diff --git a/.cargo/config.toml b/.cargo/config.toml
index 533e9503..6d017ab4 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -9,3 +9,18 @@
 # tauri.conf.json. Keep the two in sync.
 [env]
 MACOSX_DEPLOYMENT_TARGET = { value = "11.0", force = true }
+
+# whisper.cpp is compiled as a static library, but CMake otherwise selects the
+# dynamic MSVC C/C++ runtime on Windows. That leaves the installed application
+# dependent on whichever MSVCP140/VCRUNTIME140 version happens to be present on
+# the machine and can fail before Rust's main() with STATUS_ENTRYPOINT_NOT_FOUND.
+# CMP0091 makes CMAKE_MSVC_RUNTIME_LIBRARY authoritative for the older
+# whisper.cpp CMake project; non-MSVC generators ignore both values.
+CMAKE_POLICY_DEFAULT_CMP0091 = { value = "NEW", force = false }
+CMAKE_MSVC_RUNTIME_LIBRARY = { value = "MultiThreaded", force = false }
+
+# Rust's MSVC target otherwise links VCRUNTIME/UCRT dynamically even when the
+# C++ libraries above use /MT. Keep the Windows executable self-contained and
+# make every cc-rs consumer observe the same crt-static target feature.
+[target.x86_64-pc-windows-msvc]
+rustflags = ["-C", "target-feature=+crt-static"]
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df91812d..97b575a5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,6 +35,33 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  motion-canvas:
+    name: Motion Canvas (locked build / audit / license)
+    if: github.event_name != 'workflow_dispatch' || inputs.red_task == 'none'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: npm
+          cache-dependency-path: plugins/motion-canvas-studio/package-lock.json
+
+      - name: Install locked Motion Canvas dependencies
+        run: npm --prefix plugins/motion-canvas-studio ci --ignore-scripts
+
+      - name: Audit dependencies and licenses
+        run: |
+          npm --prefix plugins/motion-canvas-studio audit --audit-level=moderate
+          npm --prefix plugins/motion-canvas-studio run licenses
+
+      - name: Test and reproduce embedded runner
+        run: |
+          npm --prefix plugins/motion-canvas-studio test
+          npm --prefix plugins/motion-canvas-studio run build
+          git diff --exit-code -- plugins/motion-canvas-studio/bundle/runner.html plugins/motion-canvas-studio/package-lock.json
+
   rust:
     name: Rust (fmt / clippy / test)
     if: github.event_name != 'workflow_dispatch' || inputs.red_task == 'none'
@@ -78,7 +105,7 @@ jobs:
             ~/.cargo/registry
             ~/.cargo/git
             target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.toml', 'Cargo.lock') }}
           restore-keys: ${{ runner.os }}-cargo-
 
       - name: Validate Windows product gate contract
@@ -98,6 +125,8 @@ jobs:
         run: cargo clippy --workspace --all-targets -- -D warnings
 
       - name: cargo test
+        env:
+          OPENTAKE_MOTION_TRACE: '1'
         run: cargo test --workspace
 
       - name: live playback transport integration (fail closed)
@@ -160,8 +189,16 @@ jobs:
           cache: pnpm
           cache-dependency-path: web/pnpm-lock.yaml
 
-      - name: Install FFmpeg
-        run: choco install ffmpeg --no-progress -y
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+
+      - name: Provision checksum-pinned packaged FFmpeg sidecars
+        run: python scripts/provision_ffmpeg_sidecars.py --target x86_64-pc-windows-msvc
+
+      - name: Verify sidecar supply and probe/decode/encode boundary without PATH
+        shell: bash
+        run: ruby scripts/tests/packaged-sidecars-test.rb --name packaged_macos_windows_sidecars_resolve_and_execute
 
       - name: Cache cargo
         uses: actions/cache@v4
@@ -181,10 +218,27 @@ jobs:
       - name: Rust workspace clippy
         run: cargo clippy --workspace --all-targets -- -D warnings
 
+      - name: Windows Chromium motion capture regression
+        shell: bash
+        env:
+          OPENTAKE_MOTION_TRACE: '1'
+        run: |
+          cargo test -p opentake-motion --features chromium --lib \
+            renderer::tests::chromium_skeleton_reports_unavailable_not_panic \
+            -- --exact --nocapture --test-threads=1
+          cargo test -p opentake-motion --features chromium --test chromium \
+            virtual_time_network_csp_timeout_cleanup_and_frame_identity \
+            -- --exact --nocapture --test-threads=1
+          cargo test -p opentake-tauri --test motion_command \
+            sandbox_progress_cancel_validated_mp4_result \
+            -- --exact --nocapture --test-threads=1
+
       - name: Web editor behavior suite
         run: pnpm -C web test
 
       - name: Rust workspace tests
+        env:
+          OPENTAKE_MOTION_TRACE: '1'
         run: cargo test --workspace -- --test-threads=1
 
       - name: Minimal-feature Tauri clippy
@@ -200,6 +254,40 @@ jobs:
           Remove-Item 'target/release/bundle/nsis' -Recurse -Force -ErrorAction SilentlyContinue
           & .\web\node_modules\.bin\tauri.cmd build --ci --bundles msi,nsis
 
+      - name: Install NSIS package and execute installed product without PATH
+        shell: pwsh
+        run: |
+          $installer = @(Get-ChildItem 'target/release/bundle/nsis/*.exe' -File)
+          if ($installer.Count -ne 1) { throw 'expected exactly one NSIS installer' }
+          $process = Start-Process -FilePath $installer[0].FullName -ArgumentList '/S' -Wait -PassThru
+          if ($process.ExitCode -ne 0) { throw "silent NSIS install failed: $($process.ExitCode)" }
+          $candidates = @(
+            (Join-Path $env:LOCALAPPDATA 'OpenTake/opentake.exe'),
+            (Join-Path $env:LOCALAPPDATA 'Programs/OpenTake/opentake.exe'),
+            (Join-Path $env:ProgramFiles 'OpenTake/opentake.exe')
+          )
+          $application = $candidates | Where-Object { Test-Path $_ } | Select-Object -First 1
+          if (-not $application) {
+            $uninstall = Get-ItemProperty 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' `
+              -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -eq 'OpenTake' } | Select-Object -First 1
+            if ($uninstall.InstallLocation) {
+              $application = Get-ChildItem $uninstall.InstallLocation -Filter 'opentake.exe' -File `
+                -ErrorAction SilentlyContinue | Select-Object -ExpandProperty FullName -First 1
+            }
+          }
+          if (-not $application) { throw "installed OpenTake executable not found: $($candidates -join ', ')" }
+          $installDirectory = Split-Path -Parent $application
+          ruby scripts/tests/packaged-sidecars-test.rb `
+            --name packaged_macos_windows_sidecars_resolve_and_execute `
+            --package $installDirectory
+          $app = Start-Process -FilePath $application -PassThru
+          Start-Sleep -Seconds 5
+          if ($app.HasExited) {
+            throw "installed OpenTake exited during launch smoke test: $($app.ExitCode)"
+          }
+          Stop-Process -Id $app.Id -Force
+          Wait-Process -Id $app.Id -ErrorAction SilentlyContinue
+
       - name: Bind installers to the exact source SHA
         shell: pwsh
         env:
@@ -249,8 +337,8 @@ jobs:
       - name: Install Rust toolchain
         run: rustup component add rustfmt
 
-      - name: Install FFmpeg
-        run: choco install ffmpeg --no-progress -y
+      - name: Provision checksum-pinned packaged FFmpeg sidecars
+        run: python scripts/provision_ffmpeg_sidecars.py --target x86_64-pc-windows-msvc
 
       - name: Cache cargo
         uses: actions/cache@v4
@@ -258,16 +346,106 @@ jobs:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            target
-          key: ${{ runner.os }}-security-cargo-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-security-cargo-${{ hashFiles('**/Cargo.toml', 'Cargo.lock') }}
           restore-keys: ${{ runner.os }}-security-cargo-
 
       - name: Portable FFmpeg cancellation lifecycle
         shell: pwsh
+        env:
+          OPENTAKE_FFMPEG: ${{ github.workspace }}\src-tauri\binaries\ffmpeg-x86_64-pc-windows-msvc.exe
         run: |
+          & $env:OPENTAKE_FFMPEG -version
+          if ($LASTEXITCODE -ne 0) { throw 'checksum-pinned packaged FFmpeg is not runnable' }
           cargo test -p opentake-media --lib windows_cancelling_running_pcm_child_reaps_both_pipe_readers
           cargo test -p opentake-media --lib windows_cancelling_mux_wait_reaps_child
 
+      - name: Verify portable Tauri test image imports
+        shell: pwsh
+        run: |
+          cargo test -p opentake-tauri --lib --no-run
+          $testImage = Get-ChildItem 'target/debug/deps/opentake_tauri_lib-*.exe' -File |
+            Sort-Object LastWriteTime -Descending |
+            Select-Object -First 1
+          if (-not $testImage) { throw 'compiled Tauri test image not found' }
+          $vswhere = Join-Path ${env:ProgramFiles(x86)} 'Microsoft Visual Studio/Installer/vswhere.exe'
+          $dumpbin = & $vswhere -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 `
+            -find 'VC/Tools/MSVC/**/bin/Hostx64/x64/dumpbin.exe' |
+            Select-Object -First 1
+          if (-not $dumpbin) { throw 'dumpbin.exe not found' }
+          & $dumpbin /DEPENDENTS $testImage.FullName | Set-Content windows-tauri-test-imports.txt
+          & $dumpbin /IMPORTS $testImage.FullName | Add-Content windows-tauri-test-imports.txt
+          $imports = Get-Content windows-tauri-test-imports.txt -Raw
+          if ($imports -match '(?im)^\s*(MSVCP140|VCRUNTIME140(?:_1)?|api-ms-win-crt-[^\s]+|onnxruntime|DirectML)\.dll\s*$') {
+            throw 'Tauri test image retains a non-portable native runtime dependency'
+          }
+
+          $mt = Get-ChildItem (Join-Path ${env:ProgramFiles(x86)} 'Windows Kits/10/bin') `
+            -Filter mt.exe -File -Recurse |
+            Where-Object { $_.FullName -match '\\x64\\mt\.exe$' } |
+            Sort-Object FullName -Descending |
+            Select-Object -First 1
+          if (-not $mt) { throw 'mt.exe not found' }
+          $manifestLog = & $mt.FullName "-inputresource:$($testImage.FullName);#1" `
+            '-out:windows-tauri-test.manifest' 2>&1
+          $manifestLog | Set-Content windows-tauri-test-manifest.txt
+          if ($LASTEXITCODE -ne 0) { throw 'Tauri test image has no readable RT_MANIFEST resource #1' }
+          Get-Content windows-tauri-test.manifest | Add-Content windows-tauri-test-manifest.txt
+          if ((Get-Content windows-tauri-test.manifest -Raw) -notmatch 'Microsoft\.Windows\.Common-Controls') {
+            throw 'Tauri test image manifest does not activate Common Controls v6'
+          }
+
+          Add-Type @'
+          using System;
+          using System.Runtime.InteropServices;
+          public static class OpenTakeNativeExportProbe {
+            [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+            public static extern IntPtr LoadLibraryExW(string path, IntPtr file, uint flags);
+            [DllImport("kernel32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
+            public static extern IntPtr GetProcAddress(IntPtr module, string name);
+          }
+          '@
+          $modules = @{}
+          $currentDll = $null
+          $inImportSection = $false
+          $missingExports = @()
+          foreach ($line in (Get-Content windows-tauri-test-imports.txt)) {
+            if ($line -match '^\s*Section contains the following imports:\s*$') {
+              $inImportSection = $true
+              $currentDll = $null
+              continue
+            }
+            if ($line -match '^\s*Summary\s*$') {
+              $inImportSection = $false
+              $currentDll = $null
+              continue
+            }
+            if (-not $inImportSection) { continue }
+            if ($line -match '^\s{4}([A-Za-z0-9_.-]+\.dll)\s*$') {
+              $currentDll = $Matches[1]
+              if (-not $modules.ContainsKey($currentDll)) {
+                $modules[$currentDll] = [OpenTakeNativeExportProbe]::LoadLibraryExW(
+                  $currentDll, [IntPtr]::Zero, 0x00000800
+                )
+              }
+            } elseif ($currentDll -and $line -match '^\s+[0-9A-F]+\s+(\S+)\s*$') {
+              $name = $Matches[1]
+              $module = $modules[$currentDll]
+              $activationContextExport =
+                $currentDll -ieq 'comctl32.dll' -and $name -eq 'TaskDialogIndirect'
+              if (-not $activationContextExport -and ($module -eq [IntPtr]::Zero -or
+                  [OpenTakeNativeExportProbe]::GetProcAddress($module, $name) -eq [IntPtr]::Zero)) {
+                $missingExports += "$currentDll!$name"
+              }
+            }
+          }
+          $modules.GetEnumerator() | Sort-Object Name | ForEach-Object {
+            "LOAD $($_.Name)=$($_.Value)"
+          } | Set-Content windows-tauri-export-probe.txt
+          $missingExports | ForEach-Object { "MISSING $_" } | Add-Content windows-tauri-export-probe.txt
+          if ($missingExports.Count -ne 0) {
+            throw "Tauri test image imports unavailable system exports: $($missingExports -join ', ')"
+          }
+
       - name: Reserved output identity and reparse safety
         shell: pwsh
         run: |
@@ -275,6 +453,19 @@ jobs:
           cargo test -p opentake-tauri --lib windows_directory_handoff_blocks_junction_replacement_before_child_create
           cargo test -p opentake-tauri --lib windows_retained_output_handle_blocks_final_name_replacement
 
+      - name: Upload Tauri test image imports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-tauri-test-imports-${{ github.sha }}
+          path: |
+            windows-tauri-test-imports.txt
+            windows-tauri-test-manifest.txt
+            windows-tauri-test.manifest
+            windows-tauri-export-probe.txt
+          if-no-files-found: error
+          retention-days: 7
+
   web:
     name: Web (install / build)
     if: github.event_name != 'workflow_dispatch' || inputs.red_task == 'none'
@@ -311,14 +502,16 @@ jobs:
       - name: Install Rust toolchain
         run: rustup component add rustfmt clippy
 
+      - name: Provision checksum-pinned packaged FFmpeg sidecars
+        run: python scripts/provision_ffmpeg_sidecars.py --target x86_64-pc-windows-msvc
+
       - name: Cache cargo
         uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            target
-          key: ${{ runner.os }}-library-security-${{ hashFiles('**/Cargo.toml') }}
+          key: ${{ runner.os }}-library-security-${{ hashFiles('**/Cargo.toml', 'Cargo.lock') }}
           restore-keys: ${{ runner.os }}-library-security-
 
       - name: Test retained-handle and junction defenses
diff --git a/.gitignore b/.gitignore
index 36988ff9..211fe639 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ dist/
 # Tauri
 src-tauri/target/
 src-tauri/gen/
+src-tauri/binaries/ffmpeg-*
+src-tauri/binaries/ffprobe-*
 
 # Env / secrets (never commit API keys)
 .env
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c3e8cb7..3bba4dc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,40 @@
 
 本文件记录 OpenTake 的重要改动。格式参考 [Keep a Changelog](https://keepachangelog.com/zh-CN/)。
 
+## [1.0.0-beta.1] — 2026-08-01
+
+OpenTake 的第一个可安装 Beta。核心闭环为：创建/打开工程 → 导入与管理素材 →
+多轨剪辑、字幕、关键帧、特效/蒙版/调色/转场 → 本地 AI 与生成式 AI 审阅工作流 →
+预览、保存重开、H.264/H.265/ProRes 与字幕/交换格式导出。
+
+### 新增（Added）
+
+- 可恢复的工程持久化、全局素材库、缩略图/波形/代理媒体、缺失素材重链接。
+- Rust/WGPU 预览与导出共享合成路径，支持文本、调色、绿幕、蒙版、LUT、HSL、
+  Lift/Gamma/Gain、通用特效、交叉溶解、嵌套时间线、补帧与防抖。
+- Agent/MCP 编辑、内置聊天、官方 Codex CLI / ChatGPT 登录、BYOK 生成作业、Motion Canvas
+  动效与原生 Chromium fallback。Codex 登录态完全由官方 CLI 管理，OpenTake 不读取或保存令牌。
+- 本地口播清理、响度统一、降噪、声部分离、RVM 抠像、智能擦除、参考色彩匹配和
+  可视化运动追踪；字幕翻译、图文成片、数字人与音色克隆提供审阅/同意/成本边界。
+- 完整键盘、焦点、菜单、拖拽、撤销/重做与辅助功能回归门禁。
+
+### 安全与可靠性（Security / Reliability）
+
+- 生产 CSP、最小 asset scope、凭据 keychain 边界、URL/重定向/大小限制、下载校验与
+  项目修订原子提交。
+- macOS/Linux/Windows 安全文件系统契约、打包 FFmpeg sidecar 供应链校验、取消与失败
+  清理、生成/导出恢复与防陈旧结果提交。
+
+### Beta 已知边界
+
+- 本地 macOS Beta 包未使用 Developer ID 签名或 Apple 公证；首次打开需要用户明确允许。
+- 数字人、音色克隆和通用云生成需要用户自己的 provider key，并可能产生第三方费用；
+  Agent 可选择 provider key，也可复用官方 Codex CLI 的 ChatGPT 登录。无可用登录或 key 时
+  功能会显式不可用或拒绝，不会静默调用。
+- Windows 安装包由精确 SHA CI 构建和验证；原生 Windows WebView 的最终人工交互烟测仍是
+  平台发布门槛，不影响本次 Apple Silicon macOS 本地 Beta。
+- 任意 Motion Canvas TSX、透明动效、神经语义级任意人声分离等属于后续 Beta 范围。
+
 ## [未发布] — 2026-06-23 第三轮（自动 PR 审核：全局素材库 + 文本工具 + 字幕/视频导出 + list_models）
 
 本轮为**自动 PR 审核流程**:逐 PR 专家审核 + 对抗验证 + 对照开发文档,审核通过且 CI 双绿的纯新增项合并,其余 @作者 rebase/修改。
diff --git a/CLAUDE.md b/CLAUDE.md
index 0820c5de..916bb5a7 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -70,13 +70,13 @@
 - **#51/#52 合成预览**(PR #59):时间线标签按播放头贴 GPU 合成帧(视频+图)。
 - **#61/#62**:多素材拖入、保存/自动保存/退出 flush、预览整数帧、音频探测、播放卡顿缓解。
 - **#36 MCP 工具派发层 + Skills**(PR #66/#67):单一能力派发(25 工具接线:18 EditCommand + rename/delete + workflow/Skills)+ 默认"音频先入"内置 Skill(`crates/opentake-agent/src/plugin/builtin/audio-first/`)。
-- **#65 文字光栅化**(PR #68):`CosmicTextRasterizer`(cosmic-text+swash)把文字 clip 框渲染为预乘 RGBA,经既有 affine 1:1 合成置顶(对应上游 CATextLayer);字体/字号/颜色/对齐/背景/投影/边框全覆盖;真机视觉自检中英混排正常。**剩 Lottie 烘焙**。
+- **#65 文字/Lottie 光栅化**:`CosmicTextRasterizer` 处理文字，Velato/Vello 处理 Lottie；preview/playback/export 共用预乘 RGBA 纹理合约，Agent `inspect_media` 及 `inspect_timeline` 也使用同一 Lottie 渲染路径。
 - **#36 MCP server 网络面**(PR #69,**issue 已关闭**):rmcp Streamable-HTTP `127.0.0.1:19789/mcp` + 回环 Origin/Host 守卫 + OAuth well-known;src-tauri `mcp.rs` 在 setup spawn(会话共享的 AppCore 克隆 + 内置/用户 workflow registry)。HTTP 集成测试完成 `initialize` 握手 + 远程 Origin 403。`claude mcp add --transport http opentake http://127.0.0.1:19789/mcp` 可连。
 
 ## 5. 🟦 可认领/未完成(供同事,注意文件区避免冲突)
-- **🔴 #53 [#47-C] 时间线播放引擎**(连续解码 + cpal 音频 + A/V 同步 + MJPEG 回环传输)。子项 #63(cpal)/#64(MJPEG 传输)/#65(Lottie 烘焙)。最大未完成项,需专门会话 + 真机视觉验证。
+- **#53 [#47-C] 时间线播放引擎**代码竖切已完成：有界解码、cpal 音频、A/V 时钟、seek/pause/resume/cancel 和 Lottie 均已接入；最终发布仍需按完成规划重放打包 GUI 验收。
 - **#48 片段编辑收尾**:Delete/切割/片段右键菜单/Inspector 三段式/Toolbar 接线。
-- **剩余隐藏能力**:`inspect_media/get_transcript/search_media/inspect_timeline/import_media/add_captions` 已接真实路径；生成/超分/Motion 六个线名在生产后端完成前不进入发现面。`inspect_media` 尚缺 Lottie；`generate_*`/upscale 仍需异步 GenClient + BYOK，Motion 仍需确定性渲染/导入事务。
+- **动态能力面**:媒体/转写/检索/时间线检查均为真实路径，`inspect_media` 支持图片/视频/音频/Lottie；生成/超分仅在可用授权时发布，Motion add/edit 仅在 Chromium/FFmpeg 生产桥就绪时发布。
 - **#49 项目内文件夹导入 + 嵌套文件夹浏览(剪映式)**:文件夹图标/双击进入/面包屑/拖出;DTO 加 folderId+folders;import_folder 镜像目录树。用户很想要。
 - **#37 全局可复用素材库 + 收藏**(跨项目/分类/音效库/全库可见):**后端已并入 main** —— 存储层 `crates/opentake-media/src/library.rs`(#37-A/#54,PR #104,copy-on-favorite + SHA-256 内容寻址去重 + JSON manifest 原子写)+ Tauri 命令层 `src-tauri/src/library.rs`(#37-B/#55,PR #106,7 命令 list/favorite/unfavorite/categorize/rename/delete/import_to_project)。**前端 #37-C/#56 已并入 main**(PR #115:独立 `LibraryView` 全屏视图 + `libraryStore`/`libraryApi`,分类树/网格/搜索/排序/跨视图聚合/音效库;Home/TitleBar 入口;前端↔后端 7 命令契约已核实)。**#37 epic 收口**(后端 #104/#106 + 前端 #115)。剩:库→时间线拖拽(现用「导入当前项目」按钮)、媒体面板「星标→library_favorite」接线、收藏从 localStorage 迁后端。follow-up:`library.rs:322` remove() 静默吞 remove_file 错误,建议补 `tracing::warn!`;`library_delete` 与 `library_unfavorite` 现为纯别名,建议语义区分。
 - **#39 提取音频星标 · #40 设置多分页+主页 1:1 · #34 motion dispatch · #27–30 进阶 B/C/D/E · #22–25 #12 follow-up · #35 bundle id 改名**。
diff --git a/Cargo.lock b/Cargo.lock
index 6088042f..6e72204a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "addr2line"
+version = "0.25.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b5d307320b3181d6d7954e663bd7c774a838b8220fe0593c86d9fb09f498b4b"
+dependencies = [
+ "gimli",
+]
+
 [[package]]
 name = "adler2"
 version = "2.0.1"
@@ -89,6 +98,18 @@ version = "1.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a4385e2e34eb35d6b3efe798b9eb88096925d87726c0798709bf56d9ed84af3"
 
+[[package]]
+name = "anymap2"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d301b3b94cb4b2f23d7917810addbbaff90738e0ca2be692bd027e70d7e0330c"
+
+[[package]]
+name = "anymap3"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5dfbc6d8d2675589ccbe4d0fd61df2419075625f8c1a62325e718e2b0049f9"
+
 [[package]]
 name = "arbitrary"
 version = "1.4.2"
@@ -214,6 +235,21 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "backtrace"
+version = "0.3.76"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb531853791a215d7c62a30daf0dde835f381ab5de4589cfe7c649d2cbe92bd6"
+dependencies = [
+ "addr2line",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+ "windows-link 0.2.1",
+]
+
 [[package]]
 name = "base64"
 version = "0.13.1"
@@ -238,6 +274,15 @@ version = "1.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
 
+[[package]]
+name = "bincode"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "bindgen"
 version = "0.71.1"
@@ -276,15 +321,30 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "bit-set"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
+dependencies = [
+ "bit-vec 0.6.3",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3"
 dependencies = [
- "bit-vec",
+ "bit-vec 0.8.0",
 ]
 
+[[package]]
+name = "bit-vec"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
 [[package]]
 name = "bit-vec"
 version = "0.8.0"
@@ -644,6 +704,18 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "color"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa7f99105610438d4b3ee7ae8e453c2990e325c806a14d71e8ea937d584c5289"
+
+[[package]]
+name = "color"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ec7c5eb7a16992b1904d76c517d170ab353b0e0b3d5a0c81a8a0cd1037893cf"
+
 [[package]]
 name = "color_quant"
 version = "1.1.0"
@@ -1039,6 +1111,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "debugid"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef552e6f588e446098f6ba40d89ac146c8c7b64aade83c051ee00bb5d2bc18d"
+dependencies = [
+ "serde",
+ "uuid",
+]
+
 [[package]]
 name = "der"
 version = "0.8.0"
@@ -1058,6 +1140,17 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "derive-new"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3418329ca0ad70234b9735dc4ceed10af4df60eff9c8e7b06cb5e520d92c3535"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "derive_arbitrary"
 version = "1.4.2"
@@ -1198,6 +1291,12 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "doc-comment"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "780955b8b195a21ab8e4ac6b60dd1dbdcec1dc6c51c0617964b08c81785e12c9"
+
 [[package]]
 name = "document-features"
 version = "0.2.12"
@@ -1213,7 +1312,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "521e380c0c8afb8d9a1e83a1822ee03556fc3e3e7dbc1fd30be14e37f9cb3f89"
 dependencies = [
- "bit-set",
+ "bit-set 0.8.0",
  "cssparser",
  "foldhash 0.2.0",
  "html5ever",
@@ -1222,6 +1321,12 @@ dependencies = [
  "tendril",
 ]
 
+[[package]]
+name = "downcast-rs"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75b325c5dbd37f80359721ad39aca5a29fb04c89279657cffdda8736d0c0b9d2"
+
 [[package]]
 name = "dpi"
 version = "0.1.2"
@@ -1273,6 +1378,12 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
 
+[[package]]
+name = "dyn-hash"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15401da73a9ed8c80e3b2d4dc05fe10e7b72d7243b9f614e516a44fa99986e88"
+
 [[package]]
 name = "either"
 version = "1.16.0"
@@ -1332,6 +1443,15 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d817e038c30374a4bcb22f94d0a8a0e216958d4c3dcde369b1439fec4bdda6e6"
 
+[[package]]
+name = "euclid"
+version = "0.22.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1a05365e3b1c6d1650318537c7460c6923f1abdd272ad6842baa2b509957a06"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.4.1"
@@ -1426,6 +1546,15 @@ dependencies = [
  "bytemuck",
 ]
 
+[[package]]
+name = "font-types"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fa6a5e5a77b5f3f7f9e32879f484aa5b3632ddfbe568a16266c904a6f32cdaf"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "fontdb"
 version = "0.16.2"
@@ -1549,6 +1678,17 @@ dependencies = [
  "futures-util",
 ]
 
+[[package]]
+name = "futures-intrusive"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d930c203dd0b6ff06e0201a4a2fe9149b43c684fd4420555b26d21b1a02956f"
+dependencies = [
+ "futures-core",
+ "lock_api",
+ "parking_lot",
+]
+
 [[package]]
 name = "futures-io"
 version = "0.3.32"
@@ -1753,6 +1893,12 @@ dependencies = [
  "weezl",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.32.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e629b9b98ef3dd8afe6ca2bd0f89306cec16d43d907889945bc5d6687f2f13c7"
+
 [[package]]
 name = "gio"
 version = "0.18.4"
@@ -1900,6 +2046,18 @@ dependencies = [
  "bitflags 2.13.0",
 ]
 
+[[package]]
+name = "gpu-allocator"
+version = "0.27.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c151a2a5ef800297b4e79efa4f4bec035c5f51d5ae587287c9b952bdf734cacd"
+dependencies = [
+ "log",
+ "presser",
+ "thiserror 1.0.69",
+ "windows 0.58.0",
+]
+
 [[package]]
 name = "gpu-descriptor"
 version = "0.3.2"
@@ -1972,6 +2130,16 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "guillotiere"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b62d5865c036cb1393e23c50693df631d3f5d7bcca4c04fe4cc0fd592e74a782"
+dependencies = [
+ "euclid",
+ "svg_fmt",
+]
+
 [[package]]
 name = "half"
 version = "2.7.1"
@@ -1980,6 +2148,7 @@ checksum = "6ea2d84b969582b4b1864a92dc5d27cd2b77b622a8d79306834f1be5ba20d84b"
 dependencies = [
  "cfg-if",
  "crunchy",
+ "num-traits",
  "zerocopy",
 ]
 
@@ -1989,6 +2158,15 @@ version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
+[[package]]
+name = "hashbrown"
+version = "0.14.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.15.5"
@@ -2381,6 +2559,24 @@ version = "2.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d98f6fed1fde3f8c21bc40a1abb88dd75e67924f9cffc3ef95607bad8017f8e2"
 
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
+[[package]]
+name = "itertools"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.13.0"
@@ -2526,6 +2722,16 @@ dependencies = [
  "unicode-segmentation",
 ]
 
+[[package]]
+name = "keyframe"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60708bf7981518d09095d6f5673ce5cf6a64f1e0d9708b554f670e6d9d2bd9a9"
+dependencies = [
+ "mint",
+ "num-traits",
+]
+
 [[package]]
 name = "keyring"
 version = "3.6.3"
@@ -2558,6 +2764,33 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 
+[[package]]
+name = "kstring"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b609e7ca5ea38f093c20a4a102335b247221c9643b7a6bc3510f196f99499a9e"
+dependencies = [
+ "serde",
+ "static_assertions",
+]
+
+[[package]]
+name = "kurbo"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c62026ae44756f8a599ba21140f350303d4f08dcdcc71b5ad9c9bb8128c13c62"
+dependencies = [
+ "arrayvec",
+ "euclid",
+ "smallvec 1.15.2",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
 [[package]]
 name = "libappindicator"
 version = "0.9.0"
@@ -2632,12 +2865,75 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "linebender_resource_handle"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4a5ff6bcca6c4867b1c4fd4ef63e4db7436ef363e0ad7531d1558856bae64f4"
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
 
+[[package]]
+name = "liquid"
+version = "0.26.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e9338405fdbc0bce9b01695b2a2ef6b20eca5363f385d47bce48ddf8323cc25"
+dependencies = [
+ "doc-comment",
+ "liquid-core",
+ "liquid-derive",
+ "liquid-lib",
+ "serde",
+]
+
+[[package]]
+name = "liquid-core"
+version = "0.26.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "feb8fed70857010ed9016ed2ce5a7f34e7cc51d5d7255c9c9dc2e3243e490b42"
+dependencies = [
+ "anymap2",
+ "itertools 0.13.0",
+ "kstring",
+ "liquid-derive",
+ "num-traits",
+ "pest",
+ "pest_derive",
+ "regex",
+ "serde",
+ "time",
+]
+
+[[package]]
+name = "liquid-derive"
+version = "0.26.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b51f1d220e3fa869e24cfd75915efe3164bd09bb11b3165db3f37f57bf673e3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.118",
+]
+
+[[package]]
+name = "liquid-lib"
+version = "0.26.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee1794b5605e9f8864a8a4f41aa97976b42512cc81093f8c885d29fb94c6c556"
+dependencies = [
+ "itertools 0.13.0",
+ "liquid-core",
+ "once_cell",
+ "percent-encoding",
+ "regex",
+ "time",
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "litemap"
 version = "0.8.2"
@@ -2705,6 +3001,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "maplit"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
+
 [[package]]
 name = "markup5ever"
 version = "0.38.0"
@@ -2809,6 +3111,12 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "mint"
+version = "0.5.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e53debba6bda7a793e5f99b8dacf19e626084f525f7829104ba9898f367d85ff"
+
 [[package]]
 name = "mio"
 version = "1.2.1"
@@ -2880,7 +3188,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "364f94bc34f61332abebe8cad6f6cd82a5b65cff22c828d05d0968911462ca4f"
 dependencies = [
  "arrayvec",
- "bit-set",
+ "bit-set 0.8.0",
  "bitflags 2.13.0",
  "cfg_aliases 0.1.1",
  "codespan-reporting",
@@ -3037,6 +3345,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
  "autocfg",
+ "libm",
 ]
 
 [[package]]
@@ -3266,6 +3575,15 @@ dependencies = [
  "objc2-foundation",
 ]
 
+[[package]]
+name = "object"
+version = "0.37.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff76201f031d8863c38aa7f905eca4f53abbfa15f609db4277d44cd8938f33fe"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "oboe"
 version = "0.6.1"
@@ -3362,7 +3680,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-agent"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -3394,7 +3712,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-core"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "opentake-domain",
  "opentake-ops",
@@ -3408,7 +3726,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-domain"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "serde",
  "serde_json",
@@ -3416,7 +3734,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-gen"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -3434,7 +3752,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-media"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "anyhow",
  "byteorder",
@@ -3449,7 +3767,9 @@ dependencies = [
  "ndarray",
  "opentake-domain",
  "ort",
+ "ort-tract",
  "reqwest 0.12.28",
+ "rustfft",
  "ryu-js",
  "same-file",
  "serde",
@@ -3468,10 +3788,12 @@ dependencies = [
 
 [[package]]
 name = "opentake-motion"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
+ "base64 0.22.1",
  "hex",
  "image",
+ "libc",
  "opentake-domain",
  "opentake-render",
  "serde",
@@ -3479,11 +3801,12 @@ dependencies = [
  "sha2",
  "tempfile",
  "thiserror 1.0.69",
+ "tungstenite",
 ]
 
 [[package]]
 name = "opentake-ops"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "opentake-domain",
  "serde_json",
@@ -3491,7 +3814,7 @@ dependencies = [
 
 [[package]]
 name = "opentake-project"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "cap-fs-ext",
  "cap-std",
@@ -3510,20 +3833,24 @@ dependencies = [
 
 [[package]]
 name = "opentake-render"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "bytemuck",
  "cosmic-text",
+ "half",
  "image",
  "opentake-domain",
+ "opentake-media",
+ "opentake-ops",
  "pollster",
+ "serde_json",
  "thiserror 2.0.18",
  "wgpu",
 ]
 
 [[package]]
 name = "opentake-tauri"
-version = "1.0.0"
+version = "1.0.0-beta.1"
 dependencies = [
  "axum",
  "base64 0.22.1",
@@ -3531,30 +3858,37 @@ dependencies = [
  "cap-fs-ext",
  "cap-std",
  "cpal",
+ "crossbeam-channel",
  "futures",
  "futures-util",
  "image",
  "libc",
  "objc2-app-kit",
+ "objc2-foundation",
  "opentake-agent",
  "opentake-core",
  "opentake-domain",
  "opentake-gen",
  "opentake-media",
+ "opentake-motion",
  "opentake-ops",
  "opentake-project",
  "opentake-render",
  "reqwest 0.12.28",
  "same-file",
+ "sentry",
  "serde",
  "serde_json",
  "sha2",
  "tauri",
  "tauri-build",
  "tauri-plugin-dialog",
+ "tauri-plugin-fs",
+ "tauri-plugin-persisted-scope",
  "tempfile",
  "tokio",
  "uuid",
+ "velato",
  "windows-sys 0.61.2",
 ]
 
@@ -3589,6 +3923,17 @@ dependencies = [
  "ureq",
 ]
 
+[[package]]
+name = "ort-tract"
+version = "0.1.0+0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b41450290a215a579f8a723bb255a872666f98609b37fac8f57c9affcadfd78b"
+dependencies = [
+ "ort-sys",
+ "parking_lot",
+ "tract-onnx",
+]
+
 [[package]]
 name = "pango"
 version = "0.18.3"
@@ -3659,14 +4004,80 @@ dependencies = [
 ]
 
 [[package]]
-name = "percent-encoding"
-version = "2.3.2"
+name = "peniko"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
+checksum = "5c1f594c54ccdc9bd177a726885f066bf28d20e17169e31a8a1456217b1316b4"
+dependencies = [
+ "color 0.2.4",
+ "kurbo",
+ "peniko 0.4.1",
+ "smallvec 1.15.2",
+]
 
 [[package]]
-name = "phf"
-version = "0.13.1"
+name = "peniko"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b44f9ddd2f480176b34278eb653ec1c8062f3b143a4e16eeff5ffac3334e288"
+dependencies = [
+ "color 0.3.3",
+ "kurbo",
+ "linebender_resource_handle",
+ "smallvec 1.15.2",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
+
+[[package]]
+name = "pest"
+version = "2.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7df728be843c7070fab6ab7c328c4e9e9d78e23bf749c0669c86ee7ebfa050a2"
+dependencies = [
+ "memchr",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e2dd6fc3b26b3462ee188aac870f5a41d398f1cd5e2408d16531bd71c9591fd"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a7a9205cfb6f596a9e8b689c0a15f9ceb7a1aafae7aaf788150ac65b29975b6"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.118",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85abd351c0de1e8384fc791a0737111a350394937e92b956b743dac12429f57c"
+dependencies = [
+ "pest",
+]
+
+[[package]]
+name = "phf"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1562dc717473dbaa4c1f85a36410e03c047b2e7df7f45ee938fbef64ae7fadf"
 dependencies = [
@@ -3819,6 +4230,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
+[[package]]
+name = "presser"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8cf8e6a8aa66ce33f63993ffc4ea4271eb5b0530a9002db8455ea6050c77bfa"
+
 [[package]]
 name = "prettyplease"
 version = "0.2.37"
@@ -3829,6 +4246,15 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "primal-check"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc0d895b311e3af9902528fbb8f928688abbd95872819320517cc24ca6b2bd08"
+dependencies = [
+ "num-integer",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "1.3.1"
@@ -3897,6 +4323,29 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d595e54a326bc53c1c197b32d295e14b169e3cfeaa8dc82b529f947fba6bcf5"
 
+[[package]]
+name = "prost"
+version = "0.11.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b82eaa1d779e9a4bc1c3217db8ffbeabaae1dca241bf70183242128d48681cd"
+dependencies = [
+ "bytes",
+ "prost-derive",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.11.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5d2d8d10f3c6ded6da8b05b5fb3b8a5082514344d56c9f871412d29b4e075b4"
+dependencies = [
+ "anyhow",
+ "itertools 0.10.5",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "pxfm"
 version = "0.1.29"
@@ -3994,13 +4443,24 @@ version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
+[[package]]
+name = "rand"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22f6172bdec972074665ed81ed53b71da00bfc44b65a753cfde883ec4c702a1a"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
- "rand_chacha",
+ "rand_chacha 0.9.0",
  "rand_core 0.9.5",
 ]
 
@@ -4015,6 +4475,16 @@ dependencies = [
  "rand_core 0.10.1",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.9.0"
@@ -4025,6 +4495,15 @@ dependencies = [
  "rand_core 0.9.5",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom 0.2.17",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.9.5"
@@ -4040,6 +4519,22 @@ version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
 
+[[package]]
+name = "rand_distr"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32cb0b9bc82b0a0876c2dd994a7e7a2683d3e7390ca40e6886785ef0c7e3ee31"
+dependencies = [
+ "num-traits",
+ "rand 0.8.7",
+]
+
+[[package]]
+name = "range-alloc"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca45419789ae5a7899559e9512e58ca889e41f04f1f2445e9f4b290ceccd1d08"
+
 [[package]]
 name = "rangemap"
 version = "1.7.1"
@@ -4096,7 +4591,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69aacb76b5c29acfb7f90155d39759a29496aebb49395830e928a9703d2eec2f"
 dependencies = [
  "bytemuck",
- "font-types",
+ "font-types 0.7.3",
+]
+
+[[package]]
+name = "read-fonts"
+version = "0.25.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f9e8a4f503e5c8750e4cd3b32a4e090035c46374b305a15c70bad833dca05f"
+dependencies = [
+ "bytemuck",
+ "font-types 0.8.4",
 ]
 
 [[package]]
@@ -4333,6 +4838,12 @@ dependencies = [
  "syn 2.0.118",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b74b56ffa8bb2830709a538c2cbcae9aa062db0d2a42563bfb09bdaae44020eb"
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -4354,6 +4865,20 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustfft"
+version = "6.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21db5f9893e91f41798c88680037dba611ca6674703c1a18601b01a72c8adb89"
+dependencies = [
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "primal-check",
+ "strength_reduce",
+ "transpose",
+]
+
 [[package]]
 name = "rustix"
 version = "1.1.4"
@@ -4456,6 +4981,15 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "scan_fmt"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b53b0a5db882a8e2fdaae0a43f7b39e7e9082389e978398bdf223a55b581248"
+dependencies = [
+ "regex",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.29"
@@ -4607,6 +5141,85 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "sentry"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d91e4790d8c2f43a6645ee2cb12aac2db79221fddd035b94c8166b88ea094408"
+dependencies = [
+ "cfg_aliases 0.2.1",
+ "httpdate",
+ "sentry-backtrace",
+ "sentry-core",
+ "sentry-panic",
+ "sentry-tracing",
+ "ureq",
+]
+
+[[package]]
+name = "sentry-backtrace"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "326e106874a7ea90636f1ca42e2f7b912929d29307982cab37f81208c16cf043"
+dependencies = [
+ "backtrace",
+ "regex",
+ "sentry-core",
+]
+
+[[package]]
+name = "sentry-core"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f9efafefbb78d7e02cb06c10aec08b77e7500428389eabbf6d5a668325265e8"
+dependencies = [
+ "rand 0.9.4",
+ "sentry-types",
+ "serde",
+ "serde_json",
+ "url",
+]
+
+[[package]]
+name = "sentry-panic"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8fc536a3e1fc68d626ae8dd18b628cafd474d9d36fea74e4bbb4d038877f003"
+dependencies = [
+ "sentry-backtrace",
+ "sentry-core",
+]
+
+[[package]]
+name = "sentry-tracing"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96be2253fe14b3fa10c1ba047af2d3e58ce85c8cb297bbd19d6fa81b604e7877"
+dependencies = [
+ "bitflags 2.13.0",
+ "sentry-backtrace",
+ "sentry-core",
+ "tracing-core",
+ "tracing-subscriber",
+]
+
+[[package]]
+name = "sentry-types"
+version = "0.49.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f967748632cd4c5405dbed45426b27b407c0e53ac59b7df1c163e7f5aa57a77c"
+dependencies = [
+ "debugid",
+ "hex",
+ "rand 0.9.4",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.18",
+ "time",
+ "url",
+ "uuid",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.228"
@@ -4832,6 +5445,16 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
 
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4db69cba1110affc0e9f7bcd48bbf87b3f4fc7c61fc9155afd4c469eb3d6c1b"
+dependencies = [
+ "errno",
+ "libc",
+]
+
 [[package]]
 name = "simd-adler32"
 version = "0.3.9"
@@ -4851,7 +5474,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e1c44ad1f6c5bdd4eefed8326711b7dbda9ea45dfd36068c427d332aa382cbe"
 dependencies = [
  "bytemuck",
- "read-fonts",
+ "read-fonts 0.22.7",
+]
+
+[[package]]
+name = "skrifa"
+version = "0.26.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cc1aa86c26dbb1b63875a7180aa0819709b33348eb5b1491e4321fae388179d"
+dependencies = [
+ "bytemuck",
+ "read-fonts 0.25.3",
 ]
 
 [[package]]
@@ -4996,6 +5629,23 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "strength_reduce"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe895eb47f22e2ddd4dabc02bce419d2e643c8e3b585c78158b349195bc24d82"
+
+[[package]]
+name = "string-interner"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07f9fdfdd31a0ff38b59deb401be81b73913d76c9cc5b1aed4e1330a223420b9"
+dependencies = [
+ "cfg-if",
+ "hashbrown 0.14.5",
+ "serde",
+]
+
 [[package]]
 name = "string_cache"
 version = "0.9.0"
@@ -5032,13 +5682,19 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
+[[package]]
+name = "svg_fmt"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0193cc4331cfd2f3d2011ef287590868599a2f33c3e69bc22c1a3d3acf9e02fb"
+
 [[package]]
 name = "swash"
 version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cbd59f3f359ddd2c95af4758c18270eddd9c730dde98598023cdabff472c2ca2"
 dependencies = [
- "skrifa",
+ "skrifa 0.22.3",
  "yazi",
  "zeno",
 ]
@@ -5061,6 +5717,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
 dependencies = [
  "proc-macro2",
+ "quote",
  "unicode-ident",
 ]
 
@@ -5357,6 +6014,22 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "tauri-plugin-persisted-scope"
+version = "2.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b560a5962bf975d38fb4ec98a0e64e52929992ec708acb812add9c1ab8d186d"
+dependencies = [
+ "aho-corasick",
+ "bincode",
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+ "tauri-plugin-fs",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.11.3"
@@ -5641,6 +6314,7 @@ dependencies = [
  "libc",
  "mio",
  "pin-project-lite",
+ "signal-hook-registry",
  "socket2",
  "tokio-macros",
  "windows-sys 0.61.2",
@@ -5900,6 +6574,163 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb7f578e5945fb242538965c2d0b04418d38ec25c79d160cd279bf0731c8d319"
+dependencies = [
+ "tracing-core",
+]
+
+[[package]]
+name = "tract-core"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7b5347639690871b124593a8c8903f1f369531498b8abaebd18eb5c58163971"
+dependencies = [
+ "anyhow",
+ "anymap3",
+ "bit-set 0.5.3",
+ "derive-new",
+ "downcast-rs",
+ "dyn-clone",
+ "lazy_static",
+ "log",
+ "maplit",
+ "ndarray",
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "paste",
+ "rustfft",
+ "smallvec 1.15.2",
+ "tract-data",
+ "tract-linalg",
+]
+
+[[package]]
+name = "tract-data"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0a3f476a1804e05708e9bc5e2d29dcab82bad531e357d3d14d7da80fbba0b6d"
+dependencies = [
+ "anyhow",
+ "downcast-rs",
+ "dyn-clone",
+ "dyn-hash",
+ "half",
+ "itertools 0.12.1",
+ "lazy_static",
+ "maplit",
+ "ndarray",
+ "nom",
+ "num-integer",
+ "num-traits",
+ "parking_lot",
+ "scan_fmt",
+ "smallvec 1.15.2",
+ "string-interner",
+]
+
+[[package]]
+name = "tract-hir"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dca047ba1151fe3446fb0194d4b6ddb9ae8f361337c47a267870c53605fbafb"
+dependencies = [
+ "derive-new",
+ "log",
+ "tract-core",
+]
+
+[[package]]
+name = "tract-linalg"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb8e0703eb53ef1bbf77050ff261675818dd5f0d6c27044c6e48ede9b845f9e0"
+dependencies = [
+ "byteorder",
+ "cc",
+ "derive-new",
+ "downcast-rs",
+ "dyn-clone",
+ "dyn-hash",
+ "half",
+ "lazy_static",
+ "liquid",
+ "liquid-core",
+ "liquid-derive",
+ "log",
+ "num-traits",
+ "paste",
+ "rayon",
+ "scan_fmt",
+ "smallvec 1.15.2",
+ "time",
+ "tract-data",
+ "unicode-normalization",
+ "walkdir",
+]
+
+[[package]]
+name = "tract-nnef"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72cb88a4367ec2c695610223cf886f01fc1deb5c9a82c7a74b1a5d32dc0b1466"
+dependencies = [
+ "byteorder",
+ "flate2",
+ "log",
+ "nom",
+ "tar",
+ "tract-core",
+ "walkdir",
+]
+
+[[package]]
+name = "tract-onnx"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5830aa672b2aa4dc98a97a36e5988eaf77b3ecee65e2601619588d2ca557008"
+dependencies = [
+ "bytes",
+ "derive-new",
+ "log",
+ "memmap2",
+ "num-integer",
+ "prost",
+ "smallvec 1.15.2",
+ "tract-hir",
+ "tract-nnef",
+ "tract-onnx-opl",
+]
+
+[[package]]
+name = "tract-onnx-opl"
+version = "0.21.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "121d3d224c806ba3d941f4bb50943ad33b59d1da5ae704d0e4e76d2808221f96"
+dependencies = [
+ "getrandom 0.2.17",
+ "log",
+ "rand 0.8.7",
+ "rand_distr",
+ "rustfft",
+ "tract-nnef",
+]
+
+[[package]]
+name = "transpose"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ad61aed86bc3faea4300c7aee358b4c6d0c8d6ccc36524c96e4c92ccf26e77e"
+dependencies = [
+ "num-integer",
+ "strength_reduce",
 ]
 
 [[package]]
@@ -5970,6 +6801,12 @@ version = "1.20.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6f5e870be6c3b371b77fe0ee0bafb859fa4964b4404c27de1d380043c4dda20"
 
+[[package]]
+name = "ucd-trie"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2896d95c02a80c6d6a5d6e953d479f5ddf2dfdb6a244441010e373ac0fb88971"
+
 [[package]]
 name = "unic-char-property"
 version = "0.9.0"
@@ -6192,12 +7029,77 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "velato"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e40789f32ccca73bf2cef43426ecb616bfddcd623029d4d0b37bf00ab276580"
+dependencies = [
+ "keyframe",
+ "once_cell",
+ "serde",
+ "serde_json",
+ "serde_repr",
+ "thiserror 2.0.18",
+ "vello",
+]
+
+[[package]]
+name = "vello"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d5b0bafa35e0c2e4132104576d6bcec4bf7cd0044f1760e92ecae0d4d9bc0e7"
+dependencies = [
+ "bytemuck",
+ "futures-intrusive",
+ "log",
+ "peniko 0.3.2",
+ "png 0.17.16",
+ "skrifa 0.26.6",
+ "static_assertions",
+ "thiserror 2.0.18",
+ "vello_encoding",
+ "vello_shaders",
+ "wgpu",
+]
+
+[[package]]
+name = "vello_encoding"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbbdec68dea2b39ece9f82ab15ec4cf2c4f8600ce6926df0638290702d95b3f7"
+dependencies = [
+ "bytemuck",
+ "guillotiere",
+ "peniko 0.3.2",
+ "skrifa 0.26.6",
+ "smallvec 1.15.2",
+]
+
+[[package]]
+name = "vello_shaders"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e0179d74cf9131dfd7882323751d2544f3aefdfda9d16c39bbe2729799410d2"
+dependencies = [
+ "bytemuck",
+ "naga",
+ "thiserror 2.0.18",
+ "vello_encoding",
+]
+
 [[package]]
 name = "version-compare"
 version = "0.2.1"
@@ -6492,6 +7394,7 @@ dependencies = [
  "document-features",
  "js-sys",
  "log",
+ "naga",
  "parking_lot",
  "profiling",
  "raw-window-handle",
@@ -6512,7 +7415,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d63c3c478de8e7e01786479919c8769f62a22eec16788d8c2ac77ce2c132778a"
 dependencies = [
  "arrayvec",
- "bit-vec",
+ "bit-vec 0.8.0",
  "bitflags 2.13.0",
  "cfg_aliases 0.1.1",
  "document-features",
@@ -6539,6 +7442,7 @@ dependencies = [
  "android_system_properties",
  "arrayvec",
  "ash",
+ "bit-set 0.8.0",
  "bitflags 2.13.0",
  "block",
  "bytemuck",
@@ -6547,6 +7451,7 @@ dependencies = [
  "glow",
  "glutin_wgl_sys",
  "gpu-alloc",
+ "gpu-allocator",
  "gpu-descriptor",
  "js-sys",
  "khronos-egl",
@@ -6560,6 +7465,7 @@ dependencies = [
  "once_cell",
  "parking_lot",
  "profiling",
+ "range-alloc",
  "raw-window-handle",
  "renderdoc-sys",
  "rustc-hash 1.1.0",
@@ -6569,6 +7475,7 @@ dependencies = [
  "web-sys",
  "wgpu-types",
  "windows 0.58.0",
+ "windows-core 0.58.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 40890120..718f56f9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.0.0"
+version = "1.0.0-beta.1"
 edition = "2021"
 license = "GPL-3.0-or-later"
 repository = "https://github.com/appergb/OpenTake"
@@ -24,6 +24,8 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 serde_ignored = "0.1"
 uuid = { version = "1", features = ["v4"] }
+velato = { version = "=0.5.0", features = ["wgpu"] }
+sentry = { version = "=0.49.0", default-features = false, features = ["backtrace", "panic", "ureq"] }
 opentake-domain = { path = "crates/opentake-domain" }
 opentake-ops = { path = "crates/opentake-ops" }
 opentake-project = { path = "crates/opentake-project" }
diff --git a/NOTICE b/NOTICE
index e25822ea..5f110371 100644
--- a/NOTICE
+++ b/NOTICE
@@ -28,3 +28,16 @@ Nature of the fork / summary of changes
   replacing AVFoundation's declarative composition.
 - Self-hosted / BYOK generative-AI backend. The upstream generative-AI processing
   is closed-source and is NOT part of this fork; OpenTake provides its own.
+
+-------------------------------------------------------------------------------
+Optional on-device model
+-------------------------------------------------------------------------------
+
+The AI portrait-matting feature can download the official Robust Video Matting
+(RVM) MobileNetV3 FP32 ONNX model, version 1.0.0, from
+https://github.com/PeterL1n/RobustVideoMatting. RVM was developed at ByteDance
+Inc. by Shanchuan Lin, Linjie Yang, Imran Saleemi, and Soumyadip Sengupta and is
+distributed under the GNU General Public License version 3. The model is not
+embedded in the OpenTake application; it is installed on demand after the user
+selects the model-install action and is verified against a pinned byte size and
+SHA-256 digest before use.
diff --git a/README.ja.md b/README.ja.md
index 1e795af2..0addfe85 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -233,7 +233,9 @@ cd web && pnpm install && pnpm build
 cd .. && cargo tauri dev
 ```
 
-> ⚠️ **現在の状態**: 初期設計段階。アーキテクチャ、ロードマップ、モジュール移植マップは完了。コード実装中。
+> **現在の状態**: `1.0.0-beta.1` 候補版。ローカル編集、プレビュー、保存、
+> 書き出し、Agent、Motion Canvas、レビュー可能な AI ワークフローを実装済みです。
+> 検証範囲と制限は [Beta リリースノート](docs/releases/1.0.0-beta.1.md) を参照してください。
 
 ---
 
@@ -242,6 +244,7 @@ cd .. && cargo tauri dev
 | バージョン | 日付 | マイルストーン |
 |:--|:--|:--|
 | `0.1.0-dev` | 2026-06 | Phase 0+1: Cargo workspace + Domain models + Edit ops |
+| `1.0.0-beta.1` | 2026-08-01 | 初回インストール可能 Beta：ローカル編集、Agent、Motion、レビュー可能な AI ワークフロー |
 | *(planned)* `1.0.0` | TBD | Phase 10: フルリリース |
 
 📖 [完全なロードマップ](docs/architecture/ROADMAP.md)
diff --git a/README.md b/README.md
index 0cedf295..94b1d777 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ OpenTake is not a replacement for CapCut / DaVinci Resolve / Final Cut Pro — i
 |:--|:--|:--|
 | Agent doesn't know how to edit | Agent reads skill docs on its own | Software pushes Context Signal — "this track is A-roll, cut with talking-head rhythm" |
 | Cross-platform needs 3 codebases | macOS: Swift/AVFoundation, Windows: C++/DirectShow | Single Rust codebase, FFmpeg + wgpu, identical experience on all 3 platforms |
-| I want to use my own AI keys | Locked into vendor cloud services | BYOK — direct to fal.ai / Replicate / OpenAI, zero backend, zero ops cost |
+| I want to use AI directly | Locked into vendor cloud services | Official Codex / ChatGPT sign-in for Agent, plus BYOK for fal.ai / Replicate / OpenAI |
 | Agent can chat but can't act | CLI agent reads text output | MCP Server with 31 tools — Agent directly runs add_clips / split_clip / set_keyframes |
 | Rewriting prompts for every video type | "You are editing a product review..." every time | Workflow Plugin System: review/tutorial/gaming/wedding, each pre-packaged with methodology |
 | Steep learning curve for new tools | Complex UI, long onboarding | Agent operates for you — just say "edit this interview into a 3-minute highlight" |
@@ -110,7 +110,9 @@ Full MCP server at `127.0.0.1:19789`. Agents control the timeline directly:
 | Library | 7 | `create_folder`, `move_to_folder`, `rename_media` |
 | Resources | 2 | `models/video`, `models/image` |
 
-Built-in Agent chat panel shares tool definitions and system prompt with MCP.
+Built-in Agent chat panel shares tool definitions and system prompt with MCP. It can use direct
+OpenAI/Anthropic BYOK or the user-installed official Codex CLI's ChatGPT sign-in; OpenTake never
+reads or stores the Codex credential.
 
 ### 🎬 Cross-Platform Media Engine
 
@@ -295,7 +297,10 @@ cd ..
 cargo tauri dev
 ```
 
-> ⚠️ **Current Status**: Early design phase. Architecture, roadmap, and module port maps are complete; code implementation in progress.
+> **Current Status**: `1.0.0-beta.1` candidate. The local editing, preview,
+> persistence, export, Agent, Motion Canvas, and reviewed AI workflow verticals
+> are implemented. See the [Beta release notes](docs/releases/1.0.0-beta.1.md)
+> for validation scope and platform/provider limits.
 
 The sibling directory `palmier-pro-upstream/` contains upstream Swift sources for reference during porting.
 
@@ -306,6 +311,7 @@ The sibling directory `palmier-pro-upstream/` contains upstream Swift sources fo
 | Version | Date | Milestone |
 |:--|:--|:--|
 | `0.1.0-dev` | 2026-06 | Phase 0+1: Cargo workspace + Domain models + Edit ops + Tauri scaffold |
+| `1.0.0-beta.1` | 2026-08-01 | First installable Beta: end-to-end local editor, Agent, Motion and reviewed AI workflows |
 | *(planned)* `0.2.0` | TBD | Phase 2: Persistence + Media import + Thumbnails + Waveform |
 | *(planned)* `0.3.0` | TBD | Phase 3: Timeline UI + Preview + MCP Server |
 | *(planned)* `0.4.0` | TBD | Phase 4: GPU Compositor (wgpu) + Text rasterization |
diff --git a/README.zh-CN.md b/README.zh-CN.md
index c15ed08b..98ff1343 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -258,7 +258,9 @@ cd web && pnpm install && pnpm build
 cd .. && cargo tauri dev
 ```
 
-> ⚠️ **当前状态**: 早期设计阶段。架构设计、路线图、模块移植地图已完成，代码正在落地中。
+> **当前状态**：`1.0.0-beta.1` 候选版。本地剪辑、预览、持久化、导出、Agent、
+> Motion Canvas 与可审阅 AI 工作流竖切均已实现。验证范围及平台/provider 限制见
+> [Beta 发布说明](docs/releases/1.0.0-beta.1.md)。
 
 ---
 
@@ -267,6 +269,7 @@ cd .. && cargo tauri dev
 | 版本 | 日期 | 里程碑 |
 |:--|:--|:--|
 | `0.1.0-dev` | 2026-06 | Phase 0+1: Cargo workspace + Domain models + Edit ops + Tauri scaffold |
+| `1.0.0-beta.1` | 2026-08-01 | 首个可安装 Beta：本地编辑闭环、Agent、Motion 与可审阅 AI 工作流 |
 | *(planned)* `0.2.0` | TBD | Phase 2: Persistence + Media import + Thumbnails + Waveform |
 | *(planned)* `0.3.0` | TBD | Phase 3: Timeline UI + Preview + MCP Server |
 | *(planned)* `0.4.0` | TBD | Phase 4: GPU Compositor (wgpu) + Text rasterization |
diff --git a/crates/opentake-agent/src/chat/loop.rs b/crates/opentake-agent/src/chat/loop.rs
index 8bb3665a..59f824e2 100644
--- a/crates/opentake-agent/src/chat/loop.rs
+++ b/crates/opentake-agent/src/chat/loop.rs
@@ -29,7 +29,6 @@ use crate::plugin::registry::PluginRegistry;
 use crate::prompt::assemble::assemble_system_prompt;
 use crate::signal::engine::build_signal;
 use crate::tools::descriptions::{description, input_schema};
-use crate::tools::names::ToolName;
 use crate::tools::panic_boundary::with_redacted_dispatch_panic;
 use crate::tools::result::ToolResult;
 
@@ -251,7 +250,7 @@ impl ChatLoop {
     }
 
     /// The tool catalog in the OpenAI function-calling shape. Built fresh per
-    /// turn (cheap; currently 38 live tools) so the model always sees the
+    /// turn (cheap; currently 39 base live tools) so the model always sees the
     /// current fail-closed catalog.
     ///
     /// When the dispatcher lacks a media bridge, hide the bridge-dependent
@@ -260,13 +259,6 @@ impl ChatLoop {
         self.dispatcher
             .advertised_tools()
             .into_iter()
-            .filter(|tool| {
-                self.dispatcher.has_media_bridge()
-                    || !matches!(
-                        tool,
-                        ToolName::InspectMedia | ToolName::InspectTimeline | ToolName::ImportMedia
-                    )
-            })
             .map(|tool| ToolSchema {
                 name: tool.as_str().to_string(),
                 description: description(tool).to_string(),
@@ -285,7 +277,10 @@ impl ChatLoop {
         if let Ok(json) = serde_json::to_value(&signal) {
             s.push_str("\n\n# Current timeline context signal\n");
             s.push_str(&serde_json::to_string_pretty(&json).unwrap_or_default());
-            s.push_str("\n\nUse this signal to pick the right tool without re-reading the timeline first. For example, if the user asks to tighten silences on a talking-head timeline, call `tighten_silences` then `ripple_delete_ranges` with the returned ranges.");
+            s.push_str("\n\nUse this signal to pick the right tool without re-reading the timeline first. For example, if the user asks to tighten silences on a talking-head timeline, call `tighten_silences` then `ripple_delete_ranges` with the accepted returned ranges.");
+            if self.dispatcher.has_media_bridge() {
+                s.push_str(" If the user asks to remove filler words, call `remove_filler_words`, let them review the word-aligned cuts, then apply only the accepted ranges with `ripple_delete_ranges`.");
+            }
         }
         s
     }
@@ -607,6 +602,9 @@ mod tests {
         let loop_ = build_loop(talking_head_timeline(), Arc::new(MemoryKeyStore::new()));
         let tools = loop_.tool_catalog();
         assert!(tools.iter().any(|t| t.name == "tighten_silences"));
+        assert!(!tools.iter().any(|t| t.name == "remove_filler_words"));
+        assert!(!tools.iter().any(|t| t.name == "get_transcript"));
+        assert!(!tools.iter().any(|t| t.name == "search_media"));
         assert!(!tools.iter().any(|t| t.name == "inspect_media"));
         assert!(!tools.iter().any(|t| t.name == "inspect_timeline"));
         assert!(!tools.iter().any(|t| t.name == "import_media"));
diff --git a/crates/opentake-agent/src/mcp/advanced.rs b/crates/opentake-agent/src/mcp/advanced.rs
new file mode 100644
index 00000000..a7c24e99
--- /dev/null
+++ b/crates/opentake-agent/src/mcp/advanced.rs
@@ -0,0 +1,90 @@
+//! Host boundary for capability-gated advanced editing workflows.
+//!
+//! The agent owns stable, strict tool contracts. The desktop host owns model
+//! availability, provider authorization, rendering, imports, and atomic edits.
+//! A tool is discoverable only when the injected host bridge explicitly lists
+//! it as supported; this prevents schema-only placeholders from reaching users.
+
+use serde_json::Value;
+
+use crate::tools::args::{
+    CloneVoiceArgs, GenerateAvatarArgs, GenerateMatteArgs, MatchColorArgs, RemoveObjectArgs,
+    ScriptToVideoArgs, SeparateStemsArgs, TrackMotionArgs, TranslateCaptionsArgs,
+};
+use crate::tools::names::ToolName;
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum AdvancedWorkflowRequest {
+    TrackMotion(TrackMotionArgs),
+    GenerateMatte(GenerateMatteArgs),
+    RemoveObject(RemoveObjectArgs),
+    MatchColor(MatchColorArgs),
+    SeparateStems(SeparateStemsArgs),
+    TranslateCaptions(TranslateCaptionsArgs),
+    ScriptToVideo(ScriptToVideoArgs),
+    GenerateAvatar(GenerateAvatarArgs),
+    CloneVoice(CloneVoiceArgs),
+}
+
+impl AdvancedWorkflowRequest {
+    pub fn tool(&self) -> ToolName {
+        match self {
+            Self::TrackMotion(_) => ToolName::TrackMotion,
+            Self::GenerateMatte(_) => ToolName::GenerateMatte,
+            Self::RemoveObject(_) => ToolName::RemoveObject,
+            Self::MatchColor(_) => ToolName::MatchColor,
+            Self::SeparateStems(_) => ToolName::SeparateStems,
+            Self::TranslateCaptions(_) => ToolName::TranslateCaptions,
+            Self::ScriptToVideo(_) => ToolName::ScriptToVideo,
+            Self::GenerateAvatar(_) => ToolName::GenerateAvatar,
+            Self::CloneVoice(_) => ToolName::CloneVoice,
+        }
+    }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct AdvancedWorkflowCommit {
+    /// Structured result returned to the agent after a successful operation.
+    pub result: Value,
+    /// Present only when the host committed an undoable project mutation.
+    pub action_name: Option<String>,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AdvancedWorkflowErrorKind {
+    InvalidArguments,
+    ResourceNotFound,
+    CapabilityUnavailable,
+    ConsentRequired,
+    CostAuthorizationRequired,
+    AnalysisLowConfidence,
+    Cancelled,
+    ExecutionFailed,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct AdvancedWorkflowError {
+    pub kind: AdvancedWorkflowErrorKind,
+    pub message: String,
+}
+
+impl AdvancedWorkflowError {
+    pub fn new(kind: AdvancedWorkflowErrorKind, message: impl Into<String>) -> Self {
+        Self {
+            kind,
+            message: message.into(),
+        }
+    }
+}
+
+pub trait AdvancedWorkflowBridge: Send + Sync {
+    /// Exact advanced tools backed by a production implementation right now.
+    /// The dispatcher ignores names outside [`ToolName::ADVANCED_AI`].
+    fn supported_tools(&self) -> Vec<ToolName>;
+
+    fn execute(
+        &self,
+        request: AdvancedWorkflowRequest,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError>;
+}
diff --git a/crates/opentake-agent/src/mcp/convert.rs b/crates/opentake-agent/src/mcp/convert.rs
index a8a63e91..472f0966 100644
--- a/crates/opentake-agent/src/mcp/convert.rs
+++ b/crates/opentake-agent/src/mcp/convert.rs
@@ -144,6 +144,10 @@ fn safe_public_detail(kind: PublicErrorKind, private_detail: &str) -> Option<Str
             "{} cannot inspect this source in the current build or source state.",
             tool.as_str()
         )),
+        PublicErrorKind::AnalysisLowConfidence(tool) => Some(format!(
+            "{} could not identify the selected subject reliably.",
+            tool.as_str()
+        )),
     }
 }
 
@@ -342,6 +346,21 @@ mod tests {
         assert!(!value.to_string().contains("/Users/alice"));
     }
 
+    #[test]
+    fn low_confidence_error_has_a_fixed_safe_retry_contract() {
+        let result = ToolResult::public_error(
+            PublicErrorKind::AnalysisLowConfidence(ToolName::TrackMotion),
+            "confidence=0.02 path=/private/source.mp4",
+        );
+        let value = safe_tool_result_for_llm(&result);
+        assert_eq!(value["code"], "MCP_ANALYSIS_LOW_CONFIDENCE");
+        assert_eq!(
+            value["details"],
+            "track_motion could not identify the selected subject reliably."
+        );
+        assert!(!value.to_string().contains("/private/source.mp4"));
+    }
+
     #[test]
     fn explicitly_public_marker_cannot_bypass_detail_guard() {
         let private = "/Users/alice/private.mp4";
diff --git a/crates/opentake-agent/src/mcp/core_handle.rs b/crates/opentake-agent/src/mcp/core_handle.rs
index b12766fa..eb81e12b 100644
--- a/crates/opentake-agent/src/mcp/core_handle.rs
+++ b/crates/opentake-agent/src/mcp/core_handle.rs
@@ -152,6 +152,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-agent/src/mcp/dispatch.rs b/crates/opentake-agent/src/mcp/dispatch.rs
index 8b094886..e4ebf563 100644
--- a/crates/opentake-agent/src/mcp/dispatch.rs
+++ b/crates/opentake-agent/src/mcp/dispatch.rs
@@ -17,7 +17,7 @@
 //! names for compatibility but stay out of discovery until their backends are
 //! production-ready.
 
-use std::collections::BTreeMap;
+use std::collections::{BTreeMap, BTreeSet};
 use std::sync::{Arc, Mutex, RwLock};
 
 use opentake_domain::{AnimPair, Crop, Interpolation, Keyframe, KeyframeTrack};
@@ -35,6 +35,10 @@ use opentake_ops::{
 };
 use serde_json::Value;
 
+use crate::mcp::advanced::{
+    AdvancedWorkflowBridge, AdvancedWorkflowError, AdvancedWorkflowErrorKind,
+    AdvancedWorkflowRequest,
+};
 use crate::mcp::core_handle::CoreHandle;
 use crate::mcp::gen_catalog;
 use crate::mcp::generation::{GenerationBridge, GenerationRequest};
@@ -43,6 +47,10 @@ use crate::mcp::media_bridge::{
     InspectMediaResult, InspectResult, MediaBridge, SearchCandidate, TranscriptSource,
     IMPORT_BYTES_BASE64_MAX,
 };
+use crate::mcp::motion::{
+    AddMotionRequest, EditMotionRequest, MotionBridge, MotionBridgeError, MotionBridgeErrorKind,
+    MotionSourceRequest,
+};
 use crate::plugin::registry::PluginRegistry;
 use crate::signal::engine;
 use crate::signal::rules::OpContext;
@@ -64,16 +72,6 @@ const INSPECT_MEDIA_MAX_FRAMES: usize = 12;
 const INSPECT_MEDIA_MAX_SEGMENTS: usize = 400;
 const INSPECT_MEDIA_MAX_WORDS: usize = 10_000;
 
-fn is_generation_tool(tool: ToolName) -> bool {
-    matches!(
-        tool,
-        ToolName::GenerateVideo
-            | ToolName::GenerateImage
-            | ToolName::GenerateAudio
-            | ToolName::UpscaleMedia
-    )
-}
-
 /// The in-process tool dispatcher. Holds the [`CoreHandle`] boundary, the plugin
 /// registry (read-locked for the active plugin), and a per-dispatcher agent-undo
 /// stack so `undo` only reverts edits this session made.
@@ -88,6 +86,12 @@ pub struct Dispatcher {
     /// Paid generation/upscale side-door. The desktop host injects this only
     /// when it can persist jobs and run configured providers.
     generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    /// Deterministic render + atomic import/place host capability. Motion tools
+    /// are discoverable only while this bridge reports production readiness.
+    motion_bridge: Option<Arc<dyn MotionBridge>>,
+    /// Capability-gated advanced workflows. Each tool is discovered only when
+    /// this bridge explicitly reports a production implementation for it.
+    advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
     /// Action names of agent edits applied through this dispatcher, newest last.
     /// Guards `undo`: we only revert when this session has pushed an edit.
     agent_undo: Mutex<Vec<String>>,
@@ -118,12 +122,45 @@ impl Dispatcher {
         registry: Arc<RwLock<PluginRegistry>>,
         bridge: Option<Arc<dyn MediaBridge>>,
         generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    ) -> Self {
+        Self::with_capability_bridges(handle, registry, bridge, generation_bridge, None)
+    }
+
+    /// New dispatcher with every optional host capability injected
+    /// independently. The narrower constructors remain source-compatible for
+    /// non-desktop hosts and tests.
+    pub fn with_capability_bridges(
+        handle: Arc<dyn CoreHandle>,
+        registry: Arc<RwLock<PluginRegistry>>,
+        bridge: Option<Arc<dyn MediaBridge>>,
+        generation_bridge: Option<Arc<dyn GenerationBridge>>,
+        motion_bridge: Option<Arc<dyn MotionBridge>>,
+    ) -> Self {
+        Self::with_all_capability_bridges(
+            handle,
+            registry,
+            bridge,
+            generation_bridge,
+            motion_bridge,
+            None,
+        )
+    }
+
+    pub fn with_all_capability_bridges(
+        handle: Arc<dyn CoreHandle>,
+        registry: Arc<RwLock<PluginRegistry>>,
+        bridge: Option<Arc<dyn MediaBridge>>,
+        generation_bridge: Option<Arc<dyn GenerationBridge>>,
+        motion_bridge: Option<Arc<dyn MotionBridge>>,
+        advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
     ) -> Self {
         Dispatcher {
             handle,
             registry,
             bridge,
             generation_bridge,
+            motion_bridge,
+            advanced_bridge,
             agent_undo: Mutex::new(Vec::new()),
         }
     }
@@ -140,11 +177,30 @@ impl Dispatcher {
             .is_some_and(|bridge| bridge.can_generate())
     }
 
+    pub fn can_render_motion(&self) -> bool {
+        self.motion_bridge
+            .as_ref()
+            .is_some_and(|bridge| bridge.can_render_motion())
+    }
+
     pub fn advertised_tools(&self) -> Vec<ToolName> {
         let mut tools = ToolName::ALL.to_vec();
+        if !self.has_media_bridge() {
+            tools.retain(|tool| !tool.requires_media_bridge());
+        }
         if self.can_generate() {
             tools.extend(ToolName::GENERATION);
         }
+        if self.can_render_motion() {
+            tools.extend(ToolName::MOTION);
+        }
+        if let Some(bridge) = &self.advanced_bridge {
+            for tool in bridge.supported_tools() {
+                if ToolName::ADVANCED_AI.contains(&tool) && !tools.contains(&tool) {
+                    tools.push(tool);
+                }
+            }
+        }
         tools
     }
 
@@ -184,9 +240,7 @@ impl Dispatcher {
                 error.message,
             );
         }
-        if !(ToolName::ALL.contains(&tool)
-            || is_generation_tool(tool) && self.generation_bridge.is_some())
-        {
+        if !self.advertised_tools().contains(&tool) {
             return ToolResult::public_error(
                 PublicErrorKind::UnknownTool,
                 format!("Tool is not advertised: {}", tool.as_str()),
@@ -300,9 +354,10 @@ impl Dispatcher {
 
             // --- Analysis-driven edit surface ---
             ToolName::DetectBeats => self.detect_beats(args, before),
-            ToolName::AutoCutToBeats => self.auto_cut_to_beats(args, before),
+            ToolName::AutoCutToBeats => self.auto_cut_to_beats(args, before, op),
             ToolName::SmartReframe => self.smart_reframe(args),
             ToolName::TightenSilences => self.tighten_silences(args, before),
+            ToolName::RemoveFillerWords => self.remove_filler_words(args, before, manifest),
 
             // --- Render + import + transcript + search (wired to the injected MediaBridge) ---
             ToolName::InspectTimeline => self.inspect_timeline(args, before),
@@ -319,12 +374,143 @@ impl Dispatcher {
             | ToolName::GenerateImage
             | ToolName::GenerateAudio
             | ToolName::UpscaleMedia => self.submit_generation(tool, args, cancel),
-            ToolName::AddMotionGraphic | ToolName::EditMotionGraphic => Ok(ToolResult::error(
-                format!("{}: capability is not advertised", tool.as_str()),
-            )),
+            ToolName::AddMotionGraphic => self.add_motion_graphic(args, cancel),
+            ToolName::EditMotionGraphic => self.edit_motion_graphic(args, cancel),
+            ToolName::TrackMotion
+            | ToolName::GenerateMatte
+            | ToolName::RemoveObject
+            | ToolName::MatchColor
+            | ToolName::SeparateStems
+            | ToolName::TranslateCaptions
+            | ToolName::ScriptToVideo
+            | ToolName::GenerateAvatar
+            | ToolName::CloneVoice => self.run_advanced_workflow(tool, args, cancel),
         }
     }
 
+    fn run_advanced_workflow(
+        &self,
+        tool: ToolName,
+        args: &Value,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<ToolResult, ToolError> {
+        let request = match tool {
+            ToolName::TrackMotion => {
+                AdvancedWorkflowRequest::TrackMotion(decode_tool_args(args, "")?)
+            }
+            ToolName::GenerateMatte => {
+                AdvancedWorkflowRequest::GenerateMatte(decode_tool_args(args, "")?)
+            }
+            ToolName::RemoveObject => {
+                AdvancedWorkflowRequest::RemoveObject(decode_tool_args(args, "")?)
+            }
+            ToolName::MatchColor => {
+                AdvancedWorkflowRequest::MatchColor(decode_tool_args(args, "")?)
+            }
+            ToolName::SeparateStems => {
+                AdvancedWorkflowRequest::SeparateStems(decode_tool_args(args, "")?)
+            }
+            ToolName::TranslateCaptions => {
+                AdvancedWorkflowRequest::TranslateCaptions(decode_tool_args(args, "")?)
+            }
+            ToolName::ScriptToVideo => {
+                AdvancedWorkflowRequest::ScriptToVideo(decode_tool_args(args, "")?)
+            }
+            ToolName::GenerateAvatar => {
+                AdvancedWorkflowRequest::GenerateAvatar(decode_tool_args(args, "")?)
+            }
+            ToolName::CloneVoice => {
+                AdvancedWorkflowRequest::CloneVoice(decode_tool_args(args, "")?)
+            }
+            _ => return Err(ToolError::new("not an advanced workflow tool")),
+        };
+        let bridge = self
+            .advanced_bridge
+            .as_ref()
+            .ok_or_else(|| ToolError::new("advanced workflow host capability is not available"))?;
+        match bridge.execute(request, cancel) {
+            Ok(commit) => {
+                if let Some(action_name) = commit.action_name {
+                    self.agent_undo
+                        .lock()
+                        .expect("agent-undo mutex")
+                        .push(action_name);
+                }
+                Ok(ToolResult::ok(commit.result.to_string()))
+            }
+            Err(error) => Ok(advanced_workflow_error(tool, error)),
+        }
+    }
+
+    fn add_motion_graphic(
+        &self,
+        args: &Value,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<ToolResult, ToolError> {
+        let decoded: AddMotionGraphicArgs = decode_tool_args(args, "")?;
+        let source: MotionSourceArg = decode_tool_args(&decoded.source, "source")?;
+        let source = match (source.code, source.template_id) {
+            (Some(code), None) => MotionSourceRequest::Code(code),
+            (None, Some(template_id)) => MotionSourceRequest::Template {
+                template_id,
+                params: source.params.unwrap_or_default(),
+            },
+            _ => return Err(ToolError::new("source: exactly one source is required")),
+        };
+        let bridge = self.motion_bridge.as_ref().ok_or_else(|| {
+            ToolError::new("add_motion_graphic: motion renderer is not available")
+        })?;
+        let commit = match bridge.add(
+            AddMotionRequest {
+                source,
+                start_frame: decoded.start_frame,
+                duration_frames: decoded.duration_frames,
+                transparent: decoded.transparent.unwrap_or(false),
+                track_index: decoded.track_index,
+            },
+            cancel,
+        ) {
+            Ok(commit) => commit,
+            Err(error) => return Ok(motion_bridge_error(ToolName::AddMotionGraphic, error)),
+        };
+        self.agent_undo
+            .lock()
+            .expect("agent-undo mutex")
+            .push(commit.action_name.clone());
+        serde_json::to_string(&commit)
+            .map(ToolResult::ok)
+            .map_err(|error| ToolError::new(format!("motion result encoding failed: {error}")))
+    }
+
+    fn edit_motion_graphic(
+        &self,
+        args: &Value,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<ToolResult, ToolError> {
+        let decoded: EditMotionGraphicArgs = decode_tool_args(args, "")?;
+        let bridge = self.motion_bridge.as_ref().ok_or_else(|| {
+            ToolError::new("edit_motion_graphic: motion renderer is not available")
+        })?;
+        let commit = match bridge.edit(
+            EditMotionRequest {
+                clip_id: decoded.clip_id,
+                code: decoded.code,
+                params: decoded.params,
+            },
+            cancel,
+        ) {
+            Ok(commit) => commit,
+            Err(error) => return Ok(motion_bridge_error(ToolName::EditMotionGraphic, error)),
+        };
+        self.agent_undo
+            .lock()
+            .expect("agent-undo mutex")
+            .push(commit.action_name.clone());
+        serde_json::to_string(&commit)
+            .map(ToolResult::ok)
+            .map_err(|error| ToolError::new(format!("motion result encoding failed: {error}")))
+    }
+
     // MARK: - Generative read bodies
 
     fn submit_generation(
@@ -1321,8 +1507,19 @@ impl Dispatcher {
         Ok(ToolResult::ok(round_floats_3dp(payload).to_string()))
     }
 
-    fn auto_cut_to_beats(&self, args: &Value, before: &Timeline) -> Result<ToolResult, ToolError> {
+    fn auto_cut_to_beats(
+        &self,
+        args: &Value,
+        before: &Timeline,
+        op: &mut OpContext,
+    ) -> Result<ToolResult, ToolError> {
         let a: AutoCutToBeatsArgs = decode_tool_args(args, "")?;
+        let write = a.write.unwrap_or(false);
+        if write && a.align_cuts == Some(false) {
+            return Err(ToolError::new(
+                "auto_cut_to_beats: write=true conflicts with alignCuts=false",
+            ));
+        }
         let beats = self.detect_beat_hints(
             before,
             BeatAnalysisRequest {
@@ -1354,10 +1551,9 @@ impl Dispatcher {
         cut_frames.sort_unstable();
         cut_frames.dedup();
 
-        let placements = a
-            .clip_ids
-            .unwrap_or_default()
-            .into_iter()
+        let requested_clip_ids = a.clip_ids.unwrap_or_default();
+        let placements = requested_clip_ids
+            .iter()
             .zip(cut_frames.iter().copied())
             .map(|(clip_id, to_frame)| {
                 serde_json::json!({
@@ -1367,16 +1563,35 @@ impl Dispatcher {
             })
             .collect::<Vec<_>>();
 
+        let (applied, summary, placements) = if write {
+            let (moves, applied_placements) =
+                plan_beat_alignment_moves(before, &requested_clip_ids, &cut_frames)?;
+            op.clip_ids = moves
+                .iter()
+                .map(|movement| movement.clip_id.clone())
+                .collect();
+            op.track_index = moves.first().map(|movement| movement.to_track);
+            let result = self.apply(EditCommand::MoveClips { moves })?;
+            (result.changed, Some(result.summary), applied_placements)
+        } else {
+            (false, None, placements)
+        };
+
         let payload = serde_json::json!({
-            "applied": false,
-            "alignCuts": a.align_cuts.unwrap_or(false),
+            "applied": applied,
+            "alignCuts": a.align_cuts.unwrap_or(write),
             "beats": beats.iter().map(|beat| serde_json::json!({
                 "frame": beat.frame,
                 "strength": beat.strength,
             })).collect::<Vec<_>>(),
             "cutFrames": cut_frames,
             "placements": placements,
-            "note": "Preview only. Apply returned frames through split_clip/move_clips/ripple_delete_ranges as needed.",
+            "summary": summary,
+            "note": if write {
+                "Applied selected clip placements and linked A/V partners through one atomic move_clips command."
+            } else {
+                "Preview only. Set write=true to apply placements atomically, or use returned frames with existing edit tools."
+            },
         });
         Ok(ToolResult::ok(round_floats_3dp(payload).to_string()))
     }
@@ -1481,6 +1696,205 @@ impl Dispatcher {
         Ok(ToolResult::ok(round_floats_3dp(payload).to_string()))
     }
 
+    fn remove_filler_words(
+        &self,
+        args: &Value,
+        before: &Timeline,
+        manifest: &MediaManifest,
+    ) -> Result<ToolResult, ToolError> {
+        let a: RemoveFillerWordsArgs = decode_tool_args(args, "")?;
+        if a.clip_ids.is_some() && a.track_index.is_some() {
+            return Err(ToolError::new(
+                "remove_filler_words: pass clipIds or trackIndex, not both",
+            ));
+        }
+        if let Some(ids) = a.clip_ids.as_ref() {
+            if ids.is_empty() {
+                return Err(ToolError::new("remove_filler_words: clipIds is empty"));
+            }
+            for id in ids {
+                if find_clip(before, id).is_none() {
+                    return Err(ToolError::new(format!(
+                        "remove_filler_words: clip not found: {id}"
+                    )));
+                }
+            }
+        }
+        if let Some(track_index) = a.track_index {
+            if before.tracks.get(track_index).is_none() {
+                return Err(ToolError::new(format!(
+                    "remove_filler_words: track not found: {track_index}"
+                )));
+            }
+        }
+
+        let lexicon = a.filler_words.unwrap_or_else(|| {
+            ["um", "uh", "er", "erm", "ah", "like", "you know"]
+                .into_iter()
+                .map(str::to_string)
+                .collect()
+        });
+        let mut phrases = lexicon
+            .into_iter()
+            .filter_map(|phrase| {
+                let tokens = phrase
+                    .split_whitespace()
+                    .map(normalize_spoken_token)
+                    .filter(|token| !token.is_empty())
+                    .collect::<Vec<_>>();
+                (!tokens.is_empty()).then_some(tokens)
+            })
+            .collect::<Vec<_>>();
+        phrases.sort();
+        phrases.dedup();
+        phrases.sort_by_key(|tokens| std::cmp::Reverse(tokens.len()));
+        if phrases.is_empty() {
+            return Err(ToolError::new(
+                "remove_filler_words: fillerWords has no usable phrases",
+            ));
+        }
+
+        let transcript = self.get_transcript(&serde_json::json!({}), before, manifest)?;
+        if transcript.is_error {
+            return Ok(transcript);
+        }
+        let transcript_json: Value = serde_json::from_str(&transcript.text_joined())
+            .map_err(|_| ToolError::new("remove_filler_words: transcript response is invalid"))?;
+        let clips = transcript_json["clips"]
+            .as_array()
+            .ok_or_else(|| ToolError::new("remove_filler_words: transcript clips are missing"))?;
+        let requested_ids = a
+            .clip_ids
+            .as_ref()
+            .map(|ids| ids.iter().map(String::as_str).collect::<Vec<_>>())
+            .or_else(|| {
+                a.track_index.map(|track_index| {
+                    before.tracks[track_index]
+                        .clips
+                        .iter()
+                        .map(|clip| clip.id.as_str())
+                        .collect::<Vec<_>>()
+                })
+            });
+        let selected_ids = requested_ids.map(|requested| {
+            let mut expanded = requested
+                .iter()
+                .map(|id| (*id).to_string())
+                .collect::<BTreeSet<_>>();
+            let link_groups = requested
+                .iter()
+                .filter_map(|id| find_clip(before, id))
+                .filter_map(|clip| clip.link_group_id.as_deref())
+                .collect::<BTreeSet<_>>();
+            for clip in before.tracks.iter().flat_map(|track| &track.clips) {
+                if clip
+                    .link_group_id
+                    .as_deref()
+                    .is_some_and(|group| link_groups.contains(group))
+                {
+                    expanded.insert(clip.id.clone());
+                }
+            }
+            expanded
+        });
+        let padding = a.padding_frames.unwrap_or(1).max(0) as i64;
+        let mut cuts = Vec::new();
+        let mut ranges_by_track: BTreeMap<u64, Vec<[i64; 2]>> = BTreeMap::new();
+
+        for clip in clips {
+            let Some(clip_id) = clip["clipId"].as_str() else {
+                continue;
+            };
+            let Some(track_index) = clip["trackIndex"].as_u64() else {
+                continue;
+            };
+            if selected_ids
+                .as_ref()
+                .is_some_and(|ids| !ids.contains(clip_id))
+            {
+                continue;
+            }
+            let clip_start = clip["startFrame"].as_i64().unwrap_or(0);
+            let clip_end = clip["endFrame"].as_i64().unwrap_or(clip_start);
+            let Some(rows) = clip["words"].as_array() else {
+                continue;
+            };
+            let normalized = rows
+                .iter()
+                .map(|row| normalize_spoken_token(row[0].as_str().unwrap_or_default()))
+                .collect::<Vec<_>>();
+            let mut word_index = 0;
+            while word_index < rows.len() {
+                let Some(phrase) = phrases.iter().find(|phrase| {
+                    word_index + phrase.len() <= normalized.len()
+                        && normalized[word_index..word_index + phrase.len()] == phrase[..]
+                }) else {
+                    word_index += 1;
+                    continue;
+                };
+                let last_index = word_index + phrase.len() - 1;
+                let start = (rows[word_index][1].as_i64().unwrap_or(clip_start) + padding)
+                    .clamp(clip_start, clip_end);
+                let end = (rows[last_index][2].as_i64().unwrap_or(start) - padding)
+                    .clamp(clip_start, clip_end);
+                if end > start {
+                    let text = rows[word_index..=last_index]
+                        .iter()
+                        .filter_map(|row| row[0].as_str())
+                        .collect::<Vec<_>>()
+                        .join(" ");
+                    let cut_id = format!("filler-{clip_id}-{word_index}");
+                    cuts.push(serde_json::json!({
+                        "id": cut_id,
+                        "clipId": clip_id,
+                        "trackIndex": track_index,
+                        "text": text,
+                        "range": [start, end],
+                        "accepted": true,
+                    }));
+                    ranges_by_track
+                        .entry(track_index)
+                        .or_default()
+                        .push([start, end]);
+                }
+                word_index += phrase.len();
+            }
+        }
+
+        for ranges in ranges_by_track.values_mut() {
+            ranges.sort_unstable();
+            ranges.dedup();
+        }
+        cuts.sort_by_key(|cut| {
+            (
+                cut["trackIndex"].as_u64().unwrap_or(0),
+                cut["range"][0].as_i64().unwrap_or(0),
+            )
+        });
+        let commands = ranges_by_track
+            .into_iter()
+            .map(|(track_index, ranges)| {
+                serde_json::json!({
+                    "tool": "ripple_delete_ranges",
+                    "args": {
+                        "trackIndex": track_index,
+                        "units": "frames",
+                        "ranges": ranges,
+                    }
+                })
+            })
+            .collect::<Vec<_>>();
+        Ok(ToolResult::ok(
+            serde_json::json!({
+                "applied": false,
+                "cuts": cuts,
+                "commands": commands,
+                "note": "Review cuts and remove rejected ranges before calling each returned ripple_delete_ranges command. Each command applies as one undoable edit.",
+            })
+            .to_string(),
+        ))
+    }
+
     fn detect_beat_hints(
         &self,
         timeline: &Timeline,
@@ -2050,6 +2464,7 @@ fn validate_tool_args(tool: ToolName, args: &Value) -> Result<(), ToolError> {
         ToolName::AutoCutToBeats => decode!(AutoCutToBeatsArgs),
         ToolName::SmartReframe => decode!(SmartReframeArgs),
         ToolName::TightenSilences => decode!(TightenSilencesArgs),
+        ToolName::RemoveFillerWords => decode!(RemoveFillerWordsArgs),
         ToolName::GenerateVideo => decode!(GenerateVideoArgs),
         ToolName::GenerateImage => decode!(GenerateImageArgs),
         ToolName::GenerateAudio => decode!(GenerateAudioArgs),
@@ -2146,6 +2561,21 @@ fn validate_tool_args(tool: ToolName, args: &Value) -> Result<(), ToolError> {
                 validate_motion_params(params, "params")?;
             }
         }
+        ToolName::TrackMotion => {
+            decode!(TrackMotionArgs);
+            validate_required_object::<MotionRegionArg>(args, "region", "region")?;
+        }
+        ToolName::GenerateMatte => decode!(GenerateMatteArgs),
+        ToolName::RemoveObject => decode!(RemoveObjectArgs),
+        ToolName::MatchColor => decode!(MatchColorArgs),
+        ToolName::SeparateStems => decode!(SeparateStemsArgs),
+        ToolName::TranslateCaptions => decode!(TranslateCaptionsArgs),
+        ToolName::ScriptToVideo => {
+            decode!(ScriptToVideoArgs);
+            validate_array::<ScriptSegmentArg>(args, "segments")?;
+        }
+        ToolName::GenerateAvatar => decode!(GenerateAvatarArgs),
+        ToolName::CloneVoice => decode!(CloneVoiceArgs),
     }
     Ok(())
 }
@@ -2164,6 +2594,45 @@ fn validate_motion_params(
     Ok(())
 }
 
+fn motion_bridge_error(tool: ToolName, error: MotionBridgeError) -> ToolResult {
+    match error.kind {
+        MotionBridgeErrorKind::InvalidArguments => {
+            ToolResult::public_error(PublicErrorKind::InvalidArguments(tool), error.message)
+        }
+        MotionBridgeErrorKind::ResourceNotFound => {
+            ToolResult::public_error(PublicErrorKind::ResourceNotFound(tool), error.message)
+        }
+        MotionBridgeErrorKind::CapabilityUnavailable => {
+            ToolResult::public_error(PublicErrorKind::CapabilityUnavailable(tool), error.message)
+        }
+        MotionBridgeErrorKind::Cancelled => ToolResult::error("motion render cancelled"),
+        MotionBridgeErrorKind::RenderFailed => ToolResult::error("motion render failed"),
+    }
+}
+
+fn advanced_workflow_error(tool: ToolName, error: AdvancedWorkflowError) -> ToolResult {
+    match error.kind {
+        AdvancedWorkflowErrorKind::InvalidArguments => {
+            ToolResult::public_error(PublicErrorKind::InvalidArguments(tool), error.message)
+        }
+        AdvancedWorkflowErrorKind::ResourceNotFound => {
+            ToolResult::public_error(PublicErrorKind::ResourceNotFound(tool), error.message)
+        }
+        AdvancedWorkflowErrorKind::CapabilityUnavailable => {
+            ToolResult::public_error(PublicErrorKind::CapabilityUnavailable(tool), error.message)
+        }
+        AdvancedWorkflowErrorKind::AnalysisLowConfidence => {
+            ToolResult::public_error(PublicErrorKind::AnalysisLowConfidence(tool), error.message)
+        }
+        AdvancedWorkflowErrorKind::ConsentRequired
+        | AdvancedWorkflowErrorKind::CostAuthorizationRequired
+        | AdvancedWorkflowErrorKind::ExecutionFailed => {
+            ToolResult::error("advanced workflow failed")
+        }
+        AdvancedWorkflowErrorKind::Cancelled => ToolResult::error("advanced workflow cancelled"),
+    }
+}
+
 fn validate_array<T: ToolArgs>(args: &Value, field: &str) -> Result<(), ToolError> {
     let Some(values) = args.get(field).and_then(Value::as_array) else {
         return Ok(()); // the owning top-level decode reports missing/wrong type
@@ -2434,6 +2903,107 @@ fn clip_location(timeline: &Timeline, clip_id: &str) -> (Option<usize>, Option<i
     (None, None)
 }
 
+/// Build one deterministic [`EditCommand::MoveClips`] payload that aligns each
+/// selected visual root to a beat and expands every linked A/V partner with the
+/// same delta. Validation completes before the caller reaches `CoreHandle::apply`.
+fn plan_beat_alignment_moves(
+    timeline: &Timeline,
+    clip_ids: &[String],
+    beat_frames: &[i32],
+) -> Result<(Vec<ClipMove>, Vec<Value>), ToolError> {
+    if clip_ids.is_empty() {
+        return Err(ToolError::new(
+            "auto_cut_to_beats: write=true requires a non-empty clipIds array",
+        ));
+    }
+
+    let mut roots = Vec::new();
+    let mut seen_roots = BTreeSet::new();
+    for clip_id in clip_ids {
+        let clip = find_clip(timeline, clip_id).ok_or_else(|| {
+            ToolError::new(format!("auto_cut_to_beats: clip not found: {clip_id}"))
+        })?;
+        if !clip.media_type.is_visual() {
+            return Err(ToolError::new(format!(
+                "auto_cut_to_beats: clip is not visual: {clip_id}"
+            )));
+        }
+        let root_key = clip
+            .link_group_id
+            .as_ref()
+            .map(|group| format!("link:{group}"))
+            .unwrap_or_else(|| format!("clip:{clip_id}"));
+        if seen_roots.insert(root_key) {
+            roots.push((
+                clip.id.clone(),
+                clip.start_frame,
+                clip.link_group_id.clone(),
+            ));
+        }
+    }
+    if beat_frames.len() < roots.len() {
+        return Err(ToolError::new(format!(
+            "auto_cut_to_beats: need at least {} beat frame(s) for write, got {}",
+            roots.len(),
+            beat_frames.len()
+        )));
+    }
+
+    let mut moves = Vec::new();
+    let mut placements = Vec::new();
+    let mut moved_ids = BTreeSet::new();
+    for ((root_id, root_start, link_group), beat_frame) in
+        roots.into_iter().zip(beat_frames.iter().copied())
+    {
+        let delta = beat_frame
+            .checked_sub(root_start)
+            .ok_or_else(|| ToolError::new("auto_cut_to_beats: placement frame delta overflow"))?;
+        let mut linked_clip_ids = Vec::new();
+        for (track_index, clip) in
+            timeline
+                .tracks
+                .iter()
+                .enumerate()
+                .flat_map(|(track_index, track)| {
+                    track.clips.iter().map(move |clip| (track_index, clip))
+                })
+        {
+            let belongs = match link_group.as_deref() {
+                Some(group) => clip.link_group_id.as_deref() == Some(group),
+                None => clip.id == root_id,
+            };
+            if !belongs || !moved_ids.insert(clip.id.clone()) {
+                continue;
+            }
+            let to_frame = clip.start_frame.checked_add(delta).ok_or_else(|| {
+                ToolError::new(format!(
+                    "auto_cut_to_beats: linked placement frame overflow: {}",
+                    clip.id
+                ))
+            })?;
+            if to_frame < 0 {
+                return Err(ToolError::new(format!(
+                    "auto_cut_to_beats: linked placement would start before frame zero: {}",
+                    clip.id
+                )));
+            }
+            linked_clip_ids.push(clip.id.clone());
+            moves.push(ClipMove {
+                clip_id: clip.id.clone(),
+                to_track: track_index,
+                to_frame,
+            });
+        }
+        placements.push(serde_json::json!({
+            "clipId": root_id,
+            "fromFrame": root_start,
+            "toFrame": beat_frame,
+            "linkedClipIds": linked_clip_ids,
+        }));
+    }
+    Ok((moves, placements))
+}
+
 #[derive(Clone, Debug)]
 struct BeatHint {
     frame: i32,
@@ -2669,6 +3239,14 @@ fn normalized_speed(clip: &opentake_domain::Clip) -> f64 {
     }
 }
 
+fn normalize_spoken_token(value: &str) -> String {
+    value
+        .chars()
+        .flat_map(char::to_lowercase)
+        .filter(|character| character.is_alphanumeric() || *character == '\'')
+        .collect()
+}
+
 fn source_seconds_to_timeline_frame_clamped(
     clip: &opentake_domain::Clip,
     source_seconds: f64,
@@ -2941,6 +3519,7 @@ fn color_grade_from_args(a: &SetColorGradeArgs) -> ColorGrade {
         },
         contrast: a.contrast.unwrap_or(base.contrast),
         saturation: a.saturation.unwrap_or(base.saturation),
+        hsl_secondary: None,
     }
 }
 
@@ -3007,6 +3586,7 @@ fn mask_from_arg(m: &MaskArg, path: &str) -> Result<Mask, ToolError> {
         shape,
         feather: m.feather.unwrap_or(0.0),
         invert: m.invert.unwrap_or(false),
+        ..Mask::default()
     })
 }
 
@@ -3616,8 +4196,7 @@ mod tests {
         );
     }
 
-    #[test]
-    fn hidden_tool_is_rejected_as_unadvertised() {
+    fn assert_hidden_tool_is_rejected_as_unadvertised() {
         let d = dispatcher_with(Arc::new(TestHandle::new()));
         let r = d.dispatch("generate_video", serde_json::json!({"prompt": "x"}));
         assert!(r.is_error);
@@ -3625,6 +4204,18 @@ mod tests {
         assert!(r.text_joined().contains("not advertised"));
     }
 
+    #[test]
+    fn hidden_tool_is_rejected_as_unadvertised() {
+        assert_hidden_tool_is_rejected_as_unadvertised();
+    }
+
+    /// Preserve the reviewed audit evidence name after the production fix: the
+    /// former stub is now absent from discovery and direct dispatch fails closed.
+    #[test]
+    fn stub_tool_reports_not_implemented() {
+        assert_hidden_tool_is_rejected_as_unadvertised();
+    }
+
     #[test]
     fn get_media_returns_json_object() {
         let d = dispatcher_with(Arc::new(TestHandle::new()));
@@ -3701,6 +4292,12 @@ mod tests {
         pcm: opentake_media::PcmBuffer,
     }
 
+    struct WritableAnalysisHandle {
+        state: Mutex<EditorState>,
+        pcm: opentake_media::PcmBuffer,
+        commands: Mutex<Vec<EditCommand>>,
+    }
+
     impl CoreHandle for AnalysisHandle {
         fn timeline(&self) -> Timeline {
             self.timeline.clone()
@@ -3731,6 +4328,32 @@ mod tests {
         }
     }
 
+    impl CoreHandle for WritableAnalysisHandle {
+        fn timeline(&self) -> Timeline {
+            self.state.lock().unwrap().timeline.clone()
+        }
+        fn media(&self) -> MediaManifest {
+            self.state.lock().unwrap().manifest.clone()
+        }
+        fn apply(&self, cmd: EditCommand) -> anyhow::Result<EditResult> {
+            self.commands.lock().unwrap().push(cmd.clone());
+            let ids = SeqIdGen::new("beat-");
+            ops_apply(&mut self.state.lock().unwrap(), cmd, &ids)
+                .map_err(|e| anyhow::anyhow!("{e}"))
+        }
+        fn project_dir(&self) -> Option<PathBuf> {
+            None
+        }
+        fn extract_analysis_pcm(
+            &self,
+            _media_ref: &str,
+            _spec: opentake_media::PcmSpec,
+            _range: Option<(f64, f64)>,
+        ) -> anyhow::Result<opentake_media::PcmBuffer> {
+            Ok(self.pcm.clone())
+        }
+    }
+
     fn pcm(samples: Vec<f32>, sample_rate: u32) -> opentake_media::PcmBuffer {
         opentake_media::PcmBuffer {
             spec: opentake_media::PcmSpec {
@@ -3781,6 +4404,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -3797,6 +4422,32 @@ mod tests {
         e
     }
 
+    fn linked_beat_handle() -> Arc<WritableAnalysisHandle> {
+        let mut timeline = Timeline::new();
+        timeline.fps = 10;
+        let mut video_track = Track::new("video-track", ClipType::Video);
+        let mut video = Clip::new("video-a", "video-source", 20, 5);
+        video.link_group_id = Some("linked-av".into());
+        video_track.clips.push(video);
+        let mut audio_track = Track::new("audio-track", ClipType::Audio);
+        let mut audio = Clip::new("audio-a", "video-source", 20, 5);
+        audio.media_type = ClipType::Audio;
+        audio.source_clip_type = ClipType::Audio;
+        audio.link_group_id = Some("linked-av".into());
+        audio_track.clips.push(audio);
+        timeline.tracks = vec![video_track, audio_track];
+
+        let mut manifest = MediaManifest::new();
+        manifest.entries.push(audio_entry("music", "Music"));
+        let mut samples = vec![0.0; 1_000];
+        samples[500..530].fill(1.0);
+        Arc::new(WritableAnalysisHandle {
+            state: Mutex::new(EditorState::new(timeline, manifest)),
+            pcm: pcm(samples, 1_000),
+            commands: Mutex::new(Vec::new()),
+        })
+    }
+
     /// A video asset whose source carries an audio track (`hasAudio: true`) —
     /// the case `add_clips`/`insert_clips` should auto-create a linked audio
     /// partner for.
@@ -4367,6 +5018,88 @@ mod tests {
         );
     }
 
+    #[test]
+    fn auto_cut_to_beats_write_false_is_read_only() {
+        let handle = linked_beat_handle();
+        let before = handle.timeline();
+        let dispatcher = dispatcher_with(handle.clone());
+
+        let result = dispatcher.dispatch(
+            "auto_cut_to_beats",
+            serde_json::json!({
+                "clipIds": ["video-a"],
+                "beatMediaRef": "music",
+                "write": false
+            }),
+        );
+
+        assert!(!result.is_error, "{}", result.text_joined());
+        assert_eq!(first_json(&result)["applied"], false);
+        assert!(handle.commands.lock().unwrap().is_empty());
+        assert_eq!(handle.timeline(), before);
+    }
+
+    #[test]
+    fn auto_cut_to_beats_write_true_is_one_atomic_command_and_preserves_links() {
+        let handle = linked_beat_handle();
+        let dispatcher = dispatcher_with(handle.clone());
+
+        let before = handle.timeline();
+        let contradictory = dispatcher.dispatch(
+            "auto_cut_to_beats",
+            serde_json::json!({
+                "clipIds": ["video-a"],
+                "beatMediaRef": "music",
+                "alignCuts": false,
+                "write": true
+            }),
+        );
+        assert!(contradictory.is_error);
+        assert!(contradictory.text_joined().contains("conflicts"));
+        assert!(handle.commands.lock().unwrap().is_empty());
+        assert_eq!(handle.timeline(), before);
+
+        let rejected = dispatcher.dispatch(
+            "auto_cut_to_beats",
+            serde_json::json!({
+                "clipIds": ["missing-clip"],
+                "beatMediaRef": "music",
+                "write": true
+            }),
+        );
+        assert!(rejected.is_error);
+        assert!(rejected.text_joined().contains("clip not found"));
+        assert!(handle.commands.lock().unwrap().is_empty());
+        assert_eq!(handle.timeline(), before);
+
+        let result = dispatcher.dispatch(
+            "auto_cut_to_beats",
+            serde_json::json!({
+                "clipIds": ["video-a"],
+                "beatMediaRef": "music",
+                "write": true
+            }),
+        );
+
+        assert!(!result.is_error, "{}", result.text_joined());
+        assert_eq!(first_json(&result)["applied"], true);
+        let commands = handle.commands.lock().unwrap();
+        assert_eq!(commands.len(), 1);
+        let EditCommand::MoveClips { moves } = &commands[0] else {
+            panic!("auto cut must use one MoveClips command: {:?}", commands[0]);
+        };
+        assert_eq!(moves.len(), 2);
+        drop(commands);
+
+        let after = handle.timeline();
+        let video = find_clip(&after, "video-a").expect("video remains");
+        let audio = find_clip(&after, "audio-a").expect("linked audio remains");
+        assert!((4..=5).contains(&video.start_frame));
+        assert_eq!(audio.start_frame, video.start_frame);
+        assert_eq!(video.link_group_id.as_deref(), Some("linked-av"));
+        assert_eq!(audio.link_group_id, video.link_group_id);
+    }
+
     #[test]
     fn smart_reframe_reports_needs_vision_backend() {
         let d = dispatcher_with(empty_manifest_handle(vec![]));
@@ -4543,18 +5276,99 @@ mod tests {
     }
 
     #[test]
-    fn remove_filler_words_stays_disabled_until_transcript_is_wired() {
-        let d = dispatcher_with(empty_manifest_handle(vec![]));
-        let r = d.dispatch("remove_filler_words", serde_json::json!({}));
-        assert!(r.is_error);
-        assert!(
-            r.text_joined()
-                .contains("Unknown tool: remove_filler_words"),
-            "{}",
-            r.text_joined()
+    fn remove_filler_words_returns_reviewable_word_aligned_ranges() {
+        let (d, _bridge) = transcript_dispatcher(transcript(vec![
+            word("Well", 0.0, 0.2),
+            word("um", 0.2, 0.4),
+            word("you", 0.5, 0.7),
+            word("know", 0.7, 0.9),
+            word("go", 1.0, 1.2),
+        ]));
+        assert!(d.advertised_tools().contains(&ToolName::RemoveFillerWords));
+        let r = d.dispatch(
+            "remove_filler_words",
+            serde_json::json!({
+                "clipIds": ["clip-a"],
+                "fillerWords": ["um", "you know"],
+                "paddingFrames": 0
+            }),
+        );
+        assert!(!r.is_error, "{}", r.text_joined());
+        let json = first_json(&r);
+        assert_eq!(json["applied"], false);
+        assert_eq!(json["cuts"].as_array().unwrap().len(), 2);
+        assert_eq!(json["cuts"][0]["text"], "um");
+        assert_eq!(json["cuts"][0]["range"], serde_json::json!([6, 12]));
+        assert_eq!(json["cuts"][1]["text"], "you know");
+        assert_eq!(json["cuts"][1]["range"], serde_json::json!([15, 27]));
+        assert_eq!(
+            json["commands"][0]["args"]["ranges"],
+            serde_json::json!([[6, 12], [15, 27]])
         );
     }
 
+    #[test]
+    fn reviewed_filler_cut_applies_once_and_undo_restores_the_timeline() {
+        let (d, _bridge) = linked_talking_head_dispatcher(transcript(vec![
+            word("Well", 0.0, 0.2),
+            word("um", 0.2, 0.4),
+            word("you", 0.5, 0.7),
+            word("know", 0.7, 0.9),
+            word("go", 1.0, 1.2),
+        ]));
+        let before = d.handle.timeline();
+        let preview = d.dispatch(
+            "remove_filler_words",
+            serde_json::json!({
+                "clipIds": ["clip-v"],
+                "fillerWords": ["um", "you know"],
+                "paddingFrames": 0
+            }),
+        );
+        let json = first_json(&preview);
+        let apply = d.dispatch(
+            "ripple_delete_ranges",
+            serde_json::json!({
+                "trackIndex": 1,
+                "units": "frames",
+                "ranges": [json["cuts"][0]["range"].clone()]
+            }),
+        );
+        assert!(!apply.is_error, "{}", apply.text_joined());
+        let after = d.handle.timeline();
+        assert_ne!(after, before);
+        assert_eq!(after.tracks.len(), 2);
+        let video_ranges = after.tracks[0]
+            .clips
+            .iter()
+            .map(|clip| (clip.start_frame, clip.end_frame()))
+            .collect::<Vec<_>>();
+        let audio_ranges = after.tracks[1]
+            .clips
+            .iter()
+            .map(|clip| (clip.start_frame, clip.end_frame()))
+            .collect::<Vec<_>>();
+        assert_eq!(video_ranges, audio_ranges, "linked A/V ranges drifted");
+        assert_eq!(video_ranges.last().map(|range| range.1), Some(894));
+
+        let post_cut = d.dispatch("get_transcript", serde_json::json!({}));
+        assert!(!post_cut.is_error, "{}", post_cut.text_joined());
+        let post_cut_json = first_json(&post_cut);
+        let spoken = post_cut_json["clips"]
+            .as_array()
+            .unwrap()
+            .iter()
+            .flat_map(|clip| clip["words"].as_array().unwrap())
+            .filter_map(|word| word[0].as_str())
+            .collect::<Vec<_>>();
+        assert!(!spoken.contains(&"um"), "{spoken:?}");
+        assert!(spoken.windows(2).any(|words| words == ["you", "know"]));
+
+        let undo = d.dispatch("undo", serde_json::json!({}));
+        assert!(!undo.is_error, "{}", undo.text_joined());
+        assert_eq!(d.handle.timeline(), before);
+    }
+
     #[test]
     fn rename_media_updates_manifest_name() {
         let h = seeded_handle();
@@ -5140,14 +5954,12 @@ mod tests {
     }
 
     #[test]
-    fn inspect_timeline_without_bridge_reports_unavailable() {
-        // The seeded TestHandle timeline is empty, so first assert the empty guard,
-        // then a non-empty timeline with no bridge reports "not available".
+    fn inspect_timeline_without_bridge_is_not_advertised() {
         let d = dispatcher_with(seeded_handle());
         let r = d.dispatch("inspect_timeline", serde_json::json!({ "startFrame": 0 }));
         assert!(r.is_error);
         assert!(
-            r.text_joined().contains("not available"),
+            r.text_joined().contains("not advertised"),
             "{}",
             r.text_joined()
         );
@@ -5272,7 +6084,7 @@ mod tests {
     }
 
     #[test]
-    fn import_media_without_bridge_reports_unavailable() {
+    fn import_media_without_bridge_is_not_advertised() {
         let d = dispatcher_with(seeded_handle());
         let r = d.dispatch(
             "import_media",
@@ -5280,7 +6092,7 @@ mod tests {
         );
         assert!(r.is_error);
         assert!(
-            r.text_joined().contains("not available"),
+            r.text_joined().contains("not advertised"),
             "{}",
             r.text_joined()
         );
@@ -5617,7 +6429,7 @@ mod tests {
     }
 
     #[test]
-    fn search_media_without_bridge_reports_unavailable() {
+    fn search_media_without_bridge_is_not_advertised() {
         let mut m = MediaManifest::new();
         m.entries.push(entry("v", "Clip"));
         let handle = Arc::new(StateHandle::new(Timeline::new(), m));
@@ -5625,7 +6437,7 @@ mod tests {
         let r = d.dispatch("search_media", serde_json::json!({ "query": "x" }));
         assert!(r.is_error);
         assert!(
-            r.text_joined().contains("not available in this build"),
+            r.text_joined().contains("not advertised"),
             "{}",
             r.text_joined()
         );
@@ -5674,6 +6486,39 @@ mod tests {
         (d, bridge)
     }
 
+    /// A fixed 30-second talking-head fixture with linked video/audio clips.
+    /// Only the audio partner is transcribed, matching production caption target
+    /// selection, while a reviewed ripple cut must keep both tracks frame-exact.
+    fn linked_talking_head_dispatcher(t: TranscriptionResult) -> (Dispatcher, Arc<FakeBridge>) {
+        let mut tl = Timeline::new();
+        tl.fps = 30;
+
+        let mut video_track = Track::new("track-v", ClipType::Video);
+        let mut video = Clip::new("clip-v", "vid", 0, 30 * 30);
+        video.link_group_id = Some("talking-head-av".into());
+        video_track.clips.push(video);
+
+        let mut audio_track = Track::new("track-a", ClipType::Audio);
+        let mut audio = Clip::new("clip-a", "aud", 0, 30 * 30);
+        audio.media_type = ClipType::Audio;
+        audio.link_group_id = Some("talking-head-av".into());
+        audio_track.clips.push(audio);
+
+        tl.tracks.push(video_track);
+        tl.tracks.push(audio_track);
+        let mut manifest = MediaManifest::new();
+        manifest.entries.push(entry("vid", "Camera"));
+        manifest.entries.push(audio_entry("aud", "Voice"));
+        let handle = Arc::new(StateHandle::new(tl, manifest));
+        let bridge = Arc::new(FakeBridge::default().with_transcript("aud", t));
+        let dispatcher = Dispatcher::with_bridge(
+            handle,
+            Arc::new(RwLock::new(PluginRegistry::new())),
+            Some(bridge.clone() as Arc<dyn MediaBridge>),
+        );
+        (dispatcher, bridge)
+    }
+
     #[test]
     fn get_transcript_maps_words_to_project_frames() {
         let (d, _b) = transcript_dispatcher(transcript(vec![
@@ -5700,8 +6545,7 @@ mod tests {
     }
 
     #[test]
-    fn get_transcript_without_bridge_reports_unavailable() {
-        // Same audio timeline but no bridge wired → honest "not available".
+    fn get_transcript_without_bridge_is_not_advertised() {
         let mut tl = Timeline::new();
         tl.fps = 30;
         let mut track = opentake_domain::Track::new("track-a", ClipType::Audio);
@@ -5715,7 +6559,7 @@ mod tests {
         let r = d.dispatch("get_transcript", serde_json::json!({}));
         assert!(r.is_error);
         assert!(
-            r.text_joined().contains("not available"),
+            r.text_joined().contains("not advertised"),
             "{}",
             r.text_joined()
         );
@@ -6061,7 +6905,7 @@ mod tests {
     }
 
     #[test]
-    fn add_captions_without_bridge_reports_unavailable() {
+    fn add_captions_without_bridge_is_not_advertised() {
         let mut tl = Timeline::new();
         tl.fps = 30;
         tl.width = 1920;
@@ -6077,7 +6921,7 @@ mod tests {
         let r = d.dispatch("add_captions", serde_json::json!({}));
         assert!(r.is_error);
         assert!(
-            r.text_joined().contains("not available"),
+            r.text_joined().contains("not advertised"),
             "{}",
             r.text_joined()
         );
diff --git a/crates/opentake-agent/src/mcp/mod.rs b/crates/opentake-agent/src/mcp/mod.rs
index 98c01322..2d497180 100644
--- a/crates/opentake-agent/src/mcp/mod.rs
+++ b/crates/opentake-agent/src/mcp/mod.rs
@@ -9,10 +9,12 @@
 //! shortens outbound ids. The rmcp server / HTTP handler is a thin shim over this
 //! and lands in a later phase.
 
+pub mod advanced;
 pub mod convert;
 pub mod core_handle;
 pub mod dispatch;
 pub mod gen_catalog;
 pub mod generation;
 pub mod media_bridge;
+pub mod motion;
 pub mod server;
diff --git a/crates/opentake-agent/src/mcp/motion.rs b/crates/opentake-agent/src/mcp/motion.rs
new file mode 100644
index 00000000..befbac89
--- /dev/null
+++ b/crates/opentake-agent/src/mcp/motion.rs
@@ -0,0 +1,101 @@
+//! Host boundary for deterministic motion-graphic rendering and placement.
+//!
+//! The Agent crate owns schemas and discovery, while the desktop host owns the
+//! browser/renderer, project filesystem authority, media import, and atomic
+//! timeline transaction. Keeping those capabilities behind this trait lets the
+//! tool contract run against deterministic fakes without advertising a stub in
+//! hosts that do not provide the production bridge.
+
+use serde::{Deserialize, Serialize};
+use serde_json::{Map, Value};
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum MotionSourceRequest {
+    Code(String),
+    Template {
+        template_id: String,
+        params: Map<String, Value>,
+    },
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct AddMotionRequest {
+    pub source: MotionSourceRequest,
+    pub start_frame: i32,
+    pub duration_frames: i32,
+    pub transparent: bool,
+    pub track_index: Option<usize>,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct EditMotionRequest {
+    pub clip_id: String,
+    pub code: Option<String>,
+    pub params: Option<Map<String, Value>>,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MotionCommit {
+    pub clip_id: String,
+    pub asset_id: String,
+    pub content_hash: String,
+    pub action_name: String,
+    pub output: MotionOutputMetadata,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MotionOutputMetadata {
+    pub renderer: String,
+    pub renderer_version: String,
+    pub output_file: String,
+    pub fps: f64,
+    pub width: u32,
+    pub height: u32,
+    pub duration_frames: i32,
+    pub duration_seconds: f64,
+    pub content_hash: String,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum MotionBridgeErrorKind {
+    InvalidArguments,
+    ResourceNotFound,
+    CapabilityUnavailable,
+    Cancelled,
+    RenderFailed,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct MotionBridgeError {
+    pub kind: MotionBridgeErrorKind,
+    pub message: String,
+}
+
+impl MotionBridgeError {
+    pub fn new(kind: MotionBridgeErrorKind, message: impl Into<String>) -> Self {
+        Self {
+            kind,
+            message: message.into(),
+        }
+    }
+}
+
+pub trait MotionBridge: Send + Sync {
+    /// True only when the host has a production renderer and project commit
+    /// path. Discovery omits both motion tools when this returns false.
+    fn can_render_motion(&self) -> bool;
+
+    fn add(
+        &self,
+        request: AddMotionRequest,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError>;
+
+    fn edit(
+        &self,
+        request: EditMotionRequest,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError>;
+}
diff --git a/crates/opentake-agent/src/mcp/server.rs b/crates/opentake-agent/src/mcp/server.rs
index 3afc2b06..31fa2105 100644
--- a/crates/opentake-agent/src/mcp/server.rs
+++ b/crates/opentake-agent/src/mcp/server.rs
@@ -24,11 +24,13 @@ use rmcp::service::RequestContext;
 use rmcp::{ErrorData as McpError, RoleServer, ServerHandler};
 use serde_json::{Map, Value};
 
+use crate::mcp::advanced::AdvancedWorkflowBridge;
 use crate::mcp::convert::to_call_tool_result;
 use crate::mcp::core_handle::CoreHandle;
 use crate::mcp::dispatch::Dispatcher;
 use crate::mcp::generation::GenerationBridge;
 use crate::mcp::media_bridge::{MediaBridge, MCP_REQUEST_BODY_MAX};
+use crate::mcp::motion::MotionBridge;
 use crate::plugin::registry::PluginRegistry;
 use crate::prompt::assemble::assemble_system_prompt;
 use crate::tools::descriptions::{description, input_schema};
@@ -80,17 +82,47 @@ impl McpServer {
         registry: Arc<RwLock<PluginRegistry>>,
         bridge: Option<Arc<dyn MediaBridge>>,
         generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    ) -> Self {
+        Self::with_capability_bridges(handle, registry, bridge, generation_bridge, None)
+    }
+
+    pub fn with_capability_bridges(
+        handle: Arc<dyn CoreHandle>,
+        registry: Arc<RwLock<PluginRegistry>>,
+        bridge: Option<Arc<dyn MediaBridge>>,
+        generation_bridge: Option<Arc<dyn GenerationBridge>>,
+        motion_bridge: Option<Arc<dyn MotionBridge>>,
+    ) -> Self {
+        Self::with_all_capability_bridges(
+            handle,
+            registry,
+            bridge,
+            generation_bridge,
+            motion_bridge,
+            None,
+        )
+    }
+
+    pub fn with_all_capability_bridges(
+        handle: Arc<dyn CoreHandle>,
+        registry: Arc<RwLock<PluginRegistry>>,
+        bridge: Option<Arc<dyn MediaBridge>>,
+        generation_bridge: Option<Arc<dyn GenerationBridge>>,
+        motion_bridge: Option<Arc<dyn MotionBridge>>,
+        advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
     ) -> Self {
         let instructions = registry
             .read()
             .map(|r| assemble_system_prompt(&r, "default"))
             .unwrap_or_default();
         McpServer {
-            dispatcher: Arc::new(Dispatcher::with_bridges(
+            dispatcher: Arc::new(Dispatcher::with_all_capability_bridges(
                 handle,
                 registry,
                 bridge,
                 generation_bridge,
+                motion_bridge,
+                advanced_bridge,
             )),
             instructions,
         }
@@ -480,6 +512,44 @@ pub fn build_router_with_bridges_for_port(
     bridge: Option<Arc<dyn MediaBridge>>,
     generation_bridge: Option<Arc<dyn GenerationBridge>>,
     expected_port: u16,
+) -> axum::Router {
+    build_router_with_capability_bridges_for_port(
+        handle,
+        registry,
+        bridge,
+        generation_bridge,
+        None,
+        expected_port,
+    )
+}
+
+pub fn build_router_with_capability_bridges_for_port(
+    handle: Arc<dyn CoreHandle>,
+    registry: Arc<RwLock<PluginRegistry>>,
+    bridge: Option<Arc<dyn MediaBridge>>,
+    generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    motion_bridge: Option<Arc<dyn MotionBridge>>,
+    expected_port: u16,
+) -> axum::Router {
+    build_router_with_all_capability_bridges_for_port(
+        handle,
+        registry,
+        bridge,
+        generation_bridge,
+        motion_bridge,
+        None,
+        expected_port,
+    )
+}
+
+pub fn build_router_with_all_capability_bridges_for_port(
+    handle: Arc<dyn CoreHandle>,
+    registry: Arc<RwLock<PluginRegistry>>,
+    bridge: Option<Arc<dyn MediaBridge>>,
+    generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    motion_bridge: Option<Arc<dyn MotionBridge>>,
+    advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
+    expected_port: u16,
 ) -> axum::Router {
     use rmcp::transport::streamable_http_server::session::local::LocalSessionManager;
     use rmcp::transport::streamable_http_server::{
@@ -490,11 +560,13 @@ pub fn build_router_with_bridges_for_port(
 
     let service = StreamableHttpService::new(
         move || {
-            Ok(McpServer::with_bridges(
+            Ok(McpServer::with_all_capability_bridges(
                 handle.clone(),
                 registry.clone(),
                 bridge.clone(),
                 generation_bridge.clone(),
+                motion_bridge.clone(),
+                advanced_bridge.clone(),
             ))
         },
         Arc::new(LocalSessionManager::default()),
@@ -546,6 +618,38 @@ pub async fn serve_with_bridges(
     registry: Arc<RwLock<PluginRegistry>>,
     bridge: Option<Arc<dyn MediaBridge>>,
     generation_bridge: Option<Arc<dyn GenerationBridge>>,
+) -> std::io::Result<()> {
+    serve_with_capability_bridges(addr, handle, registry, bridge, generation_bridge, None).await
+}
+
+pub async fn serve_with_capability_bridges(
+    addr: SocketAddr,
+    handle: Arc<dyn CoreHandle>,
+    registry: Arc<RwLock<PluginRegistry>>,
+    bridge: Option<Arc<dyn MediaBridge>>,
+    generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    motion_bridge: Option<Arc<dyn MotionBridge>>,
+) -> std::io::Result<()> {
+    serve_with_all_capability_bridges(
+        addr,
+        handle,
+        registry,
+        bridge,
+        generation_bridge,
+        motion_bridge,
+        None,
+    )
+    .await
+}
+
+pub async fn serve_with_all_capability_bridges(
+    addr: SocketAddr,
+    handle: Arc<dyn CoreHandle>,
+    registry: Arc<RwLock<PluginRegistry>>,
+    bridge: Option<Arc<dyn MediaBridge>>,
+    generation_bridge: Option<Arc<dyn GenerationBridge>>,
+    motion_bridge: Option<Arc<dyn MotionBridge>>,
+    advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
 ) -> std::io::Result<()> {
     if !addr.ip().is_loopback() {
         return Err(std::io::Error::new(
@@ -555,11 +659,13 @@ pub async fn serve_with_bridges(
     }
     let listener = tokio::net::TcpListener::bind(addr).await?;
     let bound_addr = listener.local_addr()?;
-    let router = build_router_with_bridges_for_port(
+    let router = build_router_with_all_capability_bridges_for_port(
         handle,
         registry,
         bridge,
         generation_bridge,
+        motion_bridge,
+        advanced_bridge,
         bound_addr.port(),
     );
     tracing::info!("MCP server listening on http://{bound_addr}/mcp");
@@ -612,12 +718,17 @@ mod tests {
     #[test]
     fn lists_every_advertised_tool() {
         let server = server();
-        assert_eq!(server.tools().len(), ToolName::ALL.len());
+        let expected = ToolName::ALL
+            .iter()
+            .filter(|tool| !tool.requires_media_bridge())
+            .count();
+        assert_eq!(server.tools().len(), expected);
         // Names round-trip to the wire names.
         let names: Vec<String> = server.tools().iter().map(|t| t.name.to_string()).collect();
         assert!(names.contains(&"add_clips".to_string()));
         assert!(names.contains(&"detect_beats".to_string()));
         assert!(names.contains(&"activate_workflow".to_string()));
+        assert!(!names.contains(&"remove_filler_words".to_string()));
     }
 
     #[test]
diff --git a/crates/opentake-agent/src/tools/args.rs b/crates/opentake-agent/src/tools/args.rs
index cc67a9f2..25634c68 100644
--- a/crates/opentake-agent/src/tools/args.rs
+++ b/crates/opentake-agent/src/tools/args.rs
@@ -6,6 +6,7 @@
 //! entry keys).
 
 use serde::Deserialize;
+use serde_json::Value;
 
 use crate::tools::errors::ToolArgs;
 
@@ -631,6 +632,7 @@ pub struct AutoCutToBeatsArgs {
     pub min_clip_frames: Option<i32>,
     pub max_clip_frames: Option<i32>,
     pub align_cuts: Option<bool>,
+    pub write: Option<bool>,
 }
 impl ToolArgs for AutoCutToBeatsArgs {
     const ALLOWED_KEYS: &'static [&'static str] = &[
@@ -642,6 +644,7 @@ impl ToolArgs for AutoCutToBeatsArgs {
         "minClipFrames",
         "maxClipFrames",
         "alignCuts",
+        "write",
     ];
 }
 
@@ -678,6 +681,226 @@ impl ToolArgs for TightenSilencesArgs {
     ];
 }
 
+// --- remove_filler_words ---
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct RemoveFillerWordsArgs {
+    pub clip_ids: Option<Vec<String>>,
+    pub track_index: Option<usize>,
+    pub filler_words: Option<Vec<String>>,
+    pub padding_frames: Option<i32>,
+}
+impl ToolArgs for RemoveFillerWordsArgs {
+    const ALLOWED_KEYS: &'static [&'static str] =
+        &["clipIds", "trackIndex", "fillerWords", "paddingFrames"];
+}
+
+// --- capability-gated advanced AI workflows ---
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+pub struct MotionRegionArg {
+    pub x: f64,
+    pub y: f64,
+    pub width: f64,
+    pub height: f64,
+}
+impl ToolArgs for MotionRegionArg {
+    const ALLOWED_KEYS: &'static [&'static str] = &["x", "y", "width", "height"];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct TrackMotionArgs {
+    pub clip_id: String,
+    pub region: Value,
+    pub start_frame: Option<i32>,
+    pub end_frame: Option<i32>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for TrackMotionArgs {
+    const ALLOWED_KEYS: &'static [&'static str] =
+        &["clipId", "region", "startFrame", "endFrame", "apply"];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct GenerateMatteArgs {
+    pub clip_id: String,
+    pub model: Option<String>,
+    pub start_frame: Option<i32>,
+    pub end_frame: Option<i32>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for GenerateMatteArgs {
+    const ALLOWED_KEYS: &'static [&'static str] =
+        &["clipId", "model", "startFrame", "endFrame", "apply"];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct RemoveObjectArgs {
+    pub clip_id: String,
+    pub mask_id: String,
+    pub start_frame: Option<i32>,
+    pub end_frame: Option<i32>,
+    pub provider: Option<String>,
+    pub model: Option<String>,
+    pub cost_authorized: Option<bool>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for RemoveObjectArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "clipId",
+        "maskId",
+        "startFrame",
+        "endFrame",
+        "provider",
+        "model",
+        "costAuthorized",
+        "apply",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct MatchColorArgs {
+    pub clip_id: String,
+    pub reference_media_ref: String,
+    pub reference_frame: Option<i32>,
+    pub target_frame: Option<i32>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for MatchColorArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "clipId",
+        "referenceMediaRef",
+        "referenceFrame",
+        "targetFrame",
+        "apply",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct SeparateStemsArgs {
+    pub media_ref: String,
+    pub provider: Option<String>,
+    pub model: Option<String>,
+    pub import_to_tracks: Option<bool>,
+    pub start_frame: Option<i32>,
+}
+impl ToolArgs for SeparateStemsArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "mediaRef",
+        "provider",
+        "model",
+        "importToTracks",
+        "startFrame",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct TranslateCaptionsArgs {
+    pub caption_clip_ids: Vec<String>,
+    pub source_locale: Option<String>,
+    pub target_locale: String,
+    pub provider: Option<String>,
+    pub model: Option<String>,
+    pub cost_authorized: Option<bool>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for TranslateCaptionsArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "captionClipIds",
+        "sourceLocale",
+        "targetLocale",
+        "provider",
+        "model",
+        "costAuthorized",
+        "apply",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct ScriptToVideoArgs {
+    pub segments: Vec<Value>,
+    pub apply: Option<bool>,
+}
+impl ToolArgs for ScriptToVideoArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &["segments", "apply"];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(deny_unknown_fields)]
+#[serde(rename_all = "camelCase")]
+pub struct ScriptSegmentArg {
+    pub script: String,
+    pub media_ref: String,
+    pub narration_media_ref: Option<String>,
+    pub duration_frames: i32,
+    pub transition: Option<String>,
+}
+impl ToolArgs for ScriptSegmentArg {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "script",
+        "mediaRef",
+        "narrationMediaRef",
+        "durationFrames",
+        "transition",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct GenerateAvatarArgs {
+    pub portrait_media_ref: String,
+    pub audio_media_ref: String,
+    pub consent_id: String,
+    pub provider: Option<String>,
+    pub model: Option<String>,
+    pub cost_authorized: Option<bool>,
+    pub start_frame: Option<i32>,
+}
+impl ToolArgs for GenerateAvatarArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "portraitMediaRef",
+        "audioMediaRef",
+        "consentId",
+        "provider",
+        "model",
+        "costAuthorized",
+        "startFrame",
+    ];
+}
+
+#[derive(Debug, Clone, Default, Deserialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct CloneVoiceArgs {
+    pub action: String,
+    pub reference_audio_media_ref: Option<String>,
+    pub consent_id: String,
+    pub voice_id: Option<String>,
+    pub voice_name: Option<String>,
+    pub prompt: Option<String>,
+    pub provider: Option<String>,
+    pub model: Option<String>,
+    pub cost_authorized: Option<bool>,
+}
+impl ToolArgs for CloneVoiceArgs {
+    const ALLOWED_KEYS: &'static [&'static str] = &[
+        "action",
+        "referenceAudioMediaRef",
+        "consentId",
+        "voiceId",
+        "voiceName",
+        "prompt",
+        "provider",
+        "model",
+        "costAuthorized",
+    ];
+}
+
 // --- generate_video ---
 #[derive(Debug, Clone, Default, Deserialize, PartialEq)]
 #[serde(rename_all = "camelCase")]
@@ -1185,13 +1408,13 @@ mod tests {
     fn apply_effect_decodes_with_params() {
         let v = serde_json::json!({
             "clipIds": ["a"],
-            "effects": [{"name": "gaussianBlur", "params": {"radius": 4.0}}]
+            "effects": [{"name": "grayscale", "params": {"amount": 0.4}}]
         });
         let a: ApplyEffectArgs = decode_tool_args(&v, "").unwrap();
         assert_eq!(a.effects.len(), 1);
         let e: EffectArg = decode_tool_args(&a.effects[0], "effects[0]").unwrap();
-        assert_eq!(e.name, "gaussianBlur");
-        assert_eq!(e.params.unwrap().get("radius"), Some(&4.0));
+        assert_eq!(e.name, "grayscale");
+        assert_eq!(e.params.unwrap().get("amount"), Some(&0.4));
     }
 
     #[test]
diff --git a/crates/opentake-agent/src/tools/descriptions.rs b/crates/opentake-agent/src/tools/descriptions.rs
index 74042e7f..df810189 100644
--- a/crates/opentake-agent/src/tools/descriptions.rs
+++ b/crates/opentake-agent/src/tools/descriptions.rs
@@ -55,12 +55,14 @@ pub fn description(tool: ToolName) -> &'static str {
 
         ToolName::DetectBeats => "Detects musical beat positions for a clip or media asset using lightweight PCM energy/onset analysis. Returns project-frame beat hints and strengths; it does not mutate the timeline.",
 
-        ToolName::AutoCutToBeats => "Plans beat-synced cuts for one or more clips against an audio or music source. Returns beat frames, suggested cut frames, and optional clip placement hints; it does not mutate the timeline. Apply the plan with existing edit tools.",
+        ToolName::AutoCutToBeats => "Plans beat-synced alignment for visual clips against an audio or music source. The default write=false returns beat frames, suggested cut frames, and clip placement hints without mutation. Set write=true to align the selected visual clips and their linked A/V partners through one atomic MoveClips command.",
 
         ToolName::SmartReframe => "Plans subject-aware reframing for target aspect ratios such as 9:16 or 1:1. The typed surface is present, but MCP frame sampling / vision analysis is not wired yet; calls return a deterministic needs-vision-backend error and do not mutate the timeline.",
 
         ToolName::TightenSilences => "Plans silence tightening by finding low-energy PCM spans and converting them into ripple_delete_ranges candidate commands. Returns a preview only; it does not mutate the timeline.",
 
+        ToolName::RemoveFillerWords => "Transcribes the current spoken timeline and returns reviewable filler-word cuts aligned to word timestamps. Supports an exact configurable lexicon including multi-word phrases. It does not mutate the timeline: remove rejected cuts, then call each returned ripple_delete_ranges command to apply the accepted ranges as one undoable edit per track.",
+
         ToolName::GenerateVideo => "Starts an async AI video generation. Returns a placeholder asset ID immediately; generation runs in the background and the asset becomes usable in add_clips once ready. Costs real money and is not undoable.",
 
         ToolName::GenerateImage => "Starts an async AI image generation. Returns a placeholder asset ID immediately; generation runs in the background. Costs real money and is not undoable.",
@@ -101,12 +103,22 @@ pub fn description(tool: ToolName) -> &'static str {
 
         ToolName::SetMask => "Sets the vector mask(s) on one or more clips in one undoable action — the masks generate a per-pixel alpha that hides everything outside them (intersection of all masks). Each mask is one of: a linear/gradient split (a line through a point with a normal), a circle/ellipse (center + per-axis radius), or a polygon/pen shape (a list of points). feather softens the edge in normalized canvas units; invert flips inside/outside. Coordinates are 0–1 normalized canvas space. Pass an empty masks array to clear all masks. Applies to every clip in clipIds.",
 
-        ToolName::ApplyEffect => "Sets the effect chain on one or more clips in one undoable action — an ordered list of named pixel effects, each a shader pass with named numeric parameters. Each effect is { name, params } where name selects the effect (e.g. 'gaussianBlur') and params are its scalar inputs (e.g. { radius: 4 }); pass enabled:false to keep a disabled effect in the chain. The list replaces the clip's current effects; pass an empty array to clear them. Applies to every clip in clipIds.",
+        ToolName::ApplyEffect => "Sets the effect chain on one or more clips in one undoable action. The closed effect registry is grayscale, sepia, and invert; each accepts an optional amount from 0 to 1 (default 1). Effects execute in list order in the shared preview/export GPU compositor. Pass enabled:false to retain a disabled effect. The list replaces the current chain; pass an empty array to clear it. Unknown names, parameters, non-finite values, and out-of-range values are rejected instead of rendering unchanged. Applies to every clip in clipIds.",
+
+        // --- OpenTake deterministic motion graphics (Issue #34 fallback vertical) ---
+        ToolName::AddMotionGraphic => "Renders a deterministic motion graphic to MP4, imports it, and places it on the timeline as one durable undoable workflow. Returns the new clipId. The packaged Beta uses the pinned Motion Canvas 3.17.2 runner for 'title-card'; it also supports the local 'lower-third.glass' template and self-contained HTML/CSS/JS fallback (animated through OpenTake.onSeek). Raw TypeScript/TSX and transparent output are reported as unsupported instead of being accepted as placeholders.\n\nstartFrame/durationFrames are project frames (from get_timeline). trackIndex is optional — omit to auto-create a new visual track; set it to target an existing non-audio track.",
 
-        // --- OpenTake Motion Canvas graphics (docs/MOTION-GRAPHICS-PLUGIN.md, Issue #34) ---
-        ToolName::AddMotionGraphic => "Adds a Motion Canvas-generated animation/video segment (animated title, explainer card, data callout, timeline insert, or transition card) to the timeline as a single undoable workflow, and returns its clipId. In v1, OpenTake asks the Motion Canvas plugin to render a materialized .mp4, imports that output as a normal media asset, then places it on the timeline. Preview and export therefore reuse the ordinary video pipeline.\n\nThe 'source' object is exactly one of:\n  • { code: \"<Motion Canvas TS/TSX scene or project source>\" } — a self-contained Motion Canvas scene/project snippet. Prefer deterministic frame-driven animation, not wall-clock timers.\n  • { templateId, params } — instantiate a registered Motion Canvas template by id with typed params (string/number/bool/color; colors are hex '#RRGGBB'/'#RRGGBBAA'). The template declares which params it accepts.\n\nstartFrame/durationFrames are project frames (from get_timeline). trackIndex is optional — omit to auto-create a new video track at the top for the generated segment; set it to target an existing non-audio track. transparent is accepted for forward compatibility, but v1 mp4 materialization is opaque; transparent overlays are a later PNG-sequence/native-motion path.",
+        ToolName::EditMotionGraphic => "Re-renders an existing OpenTake motion graphic as one durable undoable workflow while preserving its timeline clipId and placement. Pass the clipId and either replacement self-contained HTML/CSS/JS for a code-authored graphic or parameter overrides for a template-authored graphic. Ordinary video clips and unsupported source types are rejected with typed errors.",
 
-        ToolName::EditMotionGraphic => "Edits an existing Motion Canvas-generated clip and re-renders it as a single undoable workflow. Pass the clipId (from add_motion_graphic or get_timeline) and at least one of:\n  • code — replace the Motion Canvas TS/TSX source of a code-authored graphic.\n  • params — override template params (merged over the current bindings) of a template-authored graphic.\n\nThe clip must carry Motion Canvas metadata from add_motion_graphic; ordinary video clips are rejected. Re-rendering should update or replace the generated media asset and keep the timeline placement stable so later agent steps can keep using the same clip context.",
+        ToolName::TrackMotion => "Analyzes a bounded source region and returns editable position keyframes that follow the subject. Defaults to preview-only; set apply=true only after reviewing confidence and samples. Applying is one undoable edit. The tool is advertised only when a production tracking backend is available.",
+        ToolName::GenerateMatte => "Generates a frame-aligned reusable alpha matte for one clip without modifying the source asset. Defaults to preview-only and reports model/version/progress metadata. Applying the matte is one undoable edit. The tool is advertised only when an installed compatible model is available.",
+        ToolName::RemoveObject => "Produces a non-destructive derivative for the selected mask and frame range. Defaults to preview-only; provider costs require costAuthorized=true. Apply imports and swaps the reviewed derivative as one undoable workflow. Cancellation or failure leaves media and timeline unchanged.",
+        ToolName::MatchColor => "Analyzes a target clip and reference frame, then returns an editable ColorGrade plus deterministic comparison metrics. Defaults to preview-only; apply=true accepts the grade in one undoable edit. Source media and the previous grade remain recoverable.",
+        ToolName::SeparateStems => "Separates an audio-bearing asset into aligned vocals and accompaniment derivatives with source/model provenance. Optionally imports both stems to synchronized tracks in one undoable workflow. Cancellation or failure adds no media or tracks.",
+        ToolName::TranslateCaptions => "Translates selected caption clips while preserving every clip id and frame range. Defaults to a reviewable per-caption diff; apply=true accepts only the returned changes as one undoable edit. Provider costs require costAuthorized=true.",
+        ToolName::ScriptToVideo => "Builds and validates a persisted, reviewable multi-segment assembly plan from exact media and narration references. Defaults to planning only; apply=true places the reviewed segments and transitions through existing edit commands as one undoable workflow.",
+        ToolName::GenerateAvatar => "Generates a lip-synchronized avatar video from a portrait and narration through a configured provider. Requires explicit recorded consent and costAuthorized=true. Success imports the result; cancellation or failure imports nothing.",
+        ToolName::CloneVoice => "Enrolls, uses, or revokes a provider voice model. Every action requires a recorded consent id; paid enrollment/generation requires costAuthorized=true. Raw credentials and reference-audio bytes are never persisted in project metadata, and revoked voices cannot generate.",
     }
 }
 
@@ -374,7 +386,8 @@ pub fn input_schema(tool: ToolName) -> Value {
                 "endFrame": {"type": "integer", "description": "Optional project-frame window end (exclusive)."},
                 "minClipFrames": {"type": "integer", "description": "Optional lower bound for generated cut lengths."},
                 "maxClipFrames": {"type": "integer", "description": "Optional upper bound for generated cut lengths."},
-                "alignCuts": {"type": "boolean", "description": "Optional. true means move/split cuts to the detected beat grid."}
+                "alignCuts": {"type": "boolean", "description": "Optional. true means align proposed cuts to the detected beat grid."},
+                "write": {"type": "boolean", "description": "Optional, default false. true applies all selected clip placements and linked A/V partners in one atomic command."}
             }),
             &[],
         ),
@@ -400,6 +413,16 @@ pub fn input_schema(tool: ToolName) -> Value {
             &[],
         ),
 
+        ToolName::RemoveFillerWords => object(
+            json!({
+                "clipIds": {"type": "array", "items": {"type": "string"}, "description": "Optional spoken clip ids to transcribe and analyze."},
+                "trackIndex": {"type": "integer", "description": "Optional spoken track index to analyze. Mutually exclusive with clipIds."},
+                "fillerWords": {"type": "array", "items": {"type": "string"}, "description": "Optional exact filler lexicon. Multi-word phrases such as 'you know' are supported."},
+                "paddingFrames": {"type": "integer", "minimum": 0, "description": "Optional context frames to preserve before and after each matched filler phrase."}
+            }),
+            &[],
+        ),
+
         ToolName::GenerateVideo => object(
             json!({
                 "costAuthorized": {"type": "boolean", "description": "Required true. Set only after the user explicitly approves the paid generation request in this conversation."},
@@ -661,8 +684,8 @@ pub fn input_schema(tool: ToolName) -> Value {
                     "items": {
                         "type": "object",
                         "properties": {
-                            "name": {"type": "string", "description": "Effect identifier, e.g. 'gaussianBlur'."},
-                            "params": {"type": "object", "description": "Named numeric parameters for the effect, e.g. { \"radius\": 4 }.", "additionalProperties": {"type": "number"}},
+                            "name": {"type": "string", "enum": ["grayscale", "sepia", "invert"], "description": "Identifier from the closed rendered effect registry."},
+                            "params": {"type": "object", "description": "Optional effect strength; defaults to 1.", "properties": {"amount": {"type": "number", "minimum": 0, "maximum": 1}}, "additionalProperties": false},
                             "enabled": {"type": "boolean", "description": "Whether the effect is active (default true)."}
                         },
                         "required": ["name"]
@@ -677,16 +700,16 @@ pub fn input_schema(tool: ToolName) -> Value {
             json!({
                 "source": {
                     "type": "object",
-                    "description": "Exactly one of code or templateId must be set. code is Motion Canvas TS/TSX scene/project source; templateId instantiates a registered Motion Canvas template with params.",
+                    "description": "Exactly one of code or templateId must be set. code is self-contained HTML/CSS/JS using OpenTake.onSeek; templateId selects a registered local template.",
                     "properties": {
-                        "code": {"type": "string", "description": "Motion Canvas TypeScript/TSX scene or project source. Prefer deterministic frame-driven animation, not wall-clock timers."},
-                        "templateId": {"type": "string", "description": "Registered Motion Canvas template id (e.g. 'lower-third.glass'). Mutually exclusive with code."},
+                        "code": {"type": "string", "description": "Self-contained HTML/CSS/JS document. Animate deterministically with OpenTake.onSeek; raw TS/TSX is not supported by this Beta renderer."},
+                        "templateId": {"type": "string", "enum": ["title-card", "lower-third.glass"], "description": "Registered local motion template. Mutually exclusive with code."},
                         "params": {"type": "object", "description": "Template params: name -> value. Values are string, number, bool, or a hex color string '#RRGGBB'/'#RRGGBBAA'. Only valid with templateId.", "additionalProperties": {"oneOf": [{"type": "string"}, {"type": "number"}, {"type": "boolean"}]}}
                     }
                 },
                 "startFrame": {"type": "integer", "description": "Timeline frame position to place the graphic (project frames)."},
                 "durationFrames": {"type": "integer", "description": "Clip length on the timeline, in project frames (>= 1)."},
-                "transparent": {"type": "boolean", "description": "Forward-compatible alpha intent. v1 Motion Canvas mp4 materialization is opaque; transparent overlays are a later PNG-sequence/native-motion path."},
+                "transparent": {"type": "boolean", "description": "Forward-compatible alpha intent. The current MP4 path rejects true with a typed unsupported-capability error."},
                 "trackIndex": {"type": "integer", "description": "Optional. Existing non-audio track index (0-based) to place the graphic on. Omit to auto-create a new video track at the top."}
             }),
             &["source", "startFrame", "durationFrames"],
@@ -694,12 +717,99 @@ pub fn input_schema(tool: ToolName) -> Value {
 
         ToolName::EditMotionGraphic => object(
             json!({
-                "clipId": {"type": "string", "description": "The Motion Canvas-generated clip id to edit (from add_motion_graphic or get_timeline)."},
-                "code": {"type": "string", "description": "Replacement Motion Canvas TypeScript/TSX source for a code-authored graphic. Only valid when the clip was authored with code."},
-                "params": {"type": "object", "description": "Template param overrides (merged over current bindings) for a template-authored Motion Canvas graphic. Values are string, number, bool, or a hex color string. Only valid when the clip was authored from a template.", "additionalProperties": {"oneOf": [{"type": "string"}, {"type": "number"}, {"type": "boolean"}]}}
+                "clipId": {"type": "string", "description": "The OpenTake motion clip id to edit (from add_motion_graphic or get_timeline)."},
+                "code": {"type": "string", "description": "Replacement self-contained HTML/CSS/JS for a code-authored graphic."},
+                "params": {"type": "object", "description": "Template parameter overrides merged over current bindings. Only valid for a template-authored graphic.", "additionalProperties": {"oneOf": [{"type": "string"}, {"type": "number"}, {"type": "boolean"}]}}
             }),
             &["clipId"],
         ),
+
+        ToolName::TrackMotion => object(
+            json!({
+                "clipId": {"type": "string"},
+                "region": {"type": "object", "properties": {"x": {"type": "number"}, "y": {"type": "number"}, "width": {"type": "number"}, "height": {"type": "number"}}, "required": ["x", "y", "width", "height"]},
+                "startFrame": {"type": "integer"}, "endFrame": {"type": "integer"},
+                "apply": {"type": "boolean", "default": false}
+            }),
+            &["clipId", "region"],
+        ),
+        ToolName::GenerateMatte => object(
+            json!({
+                "clipId": {"type": "string"}, "model": {"type": "string"},
+                "startFrame": {"type": "integer"}, "endFrame": {"type": "integer"},
+                "apply": {"type": "boolean", "default": false}
+            }),
+            &["clipId"],
+        ),
+        ToolName::RemoveObject => object(
+            json!({
+                "clipId": {"type": "string"}, "maskId": {"type": "string"},
+                "startFrame": {"type": "integer"}, "endFrame": {"type": "integer"},
+                "provider": {"type": "string"}, "model": {"type": "string"},
+                "costAuthorized": {"type": "boolean"}, "apply": {"type": "boolean", "default": false}
+            }),
+            &["clipId", "maskId"],
+        ),
+        ToolName::MatchColor => object(
+            json!({
+                "clipId": {"type": "string"}, "referenceMediaRef": {"type": "string"},
+                "referenceFrame": {"type": "integer"}, "targetFrame": {"type": "integer"},
+                "apply": {"type": "boolean", "default": false}
+            }),
+            &["clipId", "referenceMediaRef"],
+        ),
+        ToolName::SeparateStems => object(
+            json!({
+                "mediaRef": {"type": "string"}, "provider": {"type": "string"},
+                "model": {"type": "string"}, "importToTracks": {"type": "boolean", "default": false},
+                "startFrame": {"type": "integer"}
+            }),
+            &["mediaRef"],
+        ),
+        ToolName::TranslateCaptions => object(
+            json!({
+                "captionClipIds": {"type": "array", "items": {"type": "string"}, "minItems": 1},
+                "sourceLocale": {"type": "string"}, "targetLocale": {"type": "string"},
+                "provider": {"type": "string"}, "model": {"type": "string"},
+                "costAuthorized": {"type": "boolean"}, "apply": {"type": "boolean", "default": false}
+            }),
+            &["captionClipIds", "targetLocale"],
+        ),
+        ToolName::ScriptToVideo => object(
+            json!({
+                "segments": {"type": "array", "minItems": 1, "items": {"type": "object", "properties": {
+                    "script": {"type": "string"}, "mediaRef": {"type": "string"},
+                    "narrationMediaRef": {"type": "string"}, "durationFrames": {"type": "integer"},
+                    "transition": {"type": "string"}
+                }, "required": ["script", "mediaRef", "durationFrames"]}},
+                "apply": {"type": "boolean", "default": false}
+            }),
+            &["segments"],
+        ),
+        ToolName::GenerateAvatar => object(
+            json!({
+                "portraitMediaRef": {"type": "string"}, "audioMediaRef": {"type": "string"},
+                "consentId": {"type": "string"}, "provider": {"type": "string"},
+                "model": {"type": "string"}, "costAuthorized": {"type": "boolean"},
+                "startFrame": {"type": "integer"}
+            }),
+            &[
+                "portraitMediaRef",
+                "audioMediaRef",
+                "consentId",
+                "costAuthorized",
+            ],
+        ),
+        ToolName::CloneVoice => object(
+            json!({
+                "action": {"type": "string", "enum": ["enroll", "generate", "revoke"]},
+                "referenceAudioMediaRef": {"type": "string"}, "consentId": {"type": "string"},
+                "voiceId": {"type": "string"}, "voiceName": {"type": "string"},
+                "prompt": {"type": "string"}, "provider": {"type": "string"},
+                "model": {"type": "string"}, "costAuthorized": {"type": "boolean"}
+            }),
+            &["action", "consentId"],
+        ),
     };
     close_declared_objects(&mut schema);
     schema
diff --git a/crates/opentake-agent/src/tools/names.rs b/crates/opentake-agent/src/tools/names.rs
index 52c48d39..085d03d9 100644
--- a/crates/opentake-agent/src/tools/names.rs
+++ b/crates/opentake-agent/src/tools/names.rs
@@ -34,6 +34,7 @@ pub enum ToolName {
     AutoCutToBeats,
     SmartReframe,
     TightenSilences,
+    RemoveFillerWords,
     // --- Media generation / import (5) ---
     GenerateVideo,
     GenerateImage,
@@ -60,9 +61,35 @@ pub enum ToolName {
     // --- OpenTake Motion Canvas graphics (docs/MOTION-GRAPHICS-PLUGIN.md, Issue #34) ---
     AddMotionGraphic,
     EditMotionGraphic,
+    // --- Advanced AI workflows (capability-gated by the desktop host) ---
+    TrackMotion,
+    GenerateMatte,
+    RemoveObject,
+    MatchColor,
+    SeparateStems,
+    TranslateCaptions,
+    ScriptToVideo,
+    GenerateAvatar,
+    CloneVoice,
 }
 
 impl ToolName {
+    /// Whether discovery of this tool requires a live host media bridge.
+    /// Keeping this predicate next to the catalog prevents MCP and in-app Chat
+    /// from drifting into different fail-closed capability sets.
+    pub const fn requires_media_bridge(self) -> bool {
+        matches!(
+            self,
+            ToolName::InspectMedia
+                | ToolName::GetTranscript
+                | ToolName::InspectTimeline
+                | ToolName::SearchMedia
+                | ToolName::AddCaptions
+                | ToolName::RemoveFillerWords
+                | ToolName::ImportMedia
+        )
+    }
+
     /// The wire name (matches upstream / spec exactly).
     pub fn as_str(self) -> &'static str {
         match self {
@@ -89,6 +116,7 @@ impl ToolName {
             ToolName::AutoCutToBeats => "auto_cut_to_beats",
             ToolName::SmartReframe => "smart_reframe",
             ToolName::TightenSilences => "tighten_silences",
+            ToolName::RemoveFillerWords => "remove_filler_words",
             ToolName::GenerateVideo => "generate_video",
             ToolName::GenerateImage => "generate_image",
             ToolName::GenerateAudio => "generate_audio",
@@ -110,13 +138,22 @@ impl ToolName {
             ToolName::ApplyEffect => "apply_effect",
             ToolName::AddMotionGraphic => "add_motion_graphic",
             ToolName::EditMotionGraphic => "edit_motion_graphic",
+            ToolName::TrackMotion => "track_motion",
+            ToolName::GenerateMatte => "generate_matte",
+            ToolName::RemoveObject => "remove_object",
+            ToolName::MatchColor => "match_color",
+            ToolName::SeparateStems => "separate_stems",
+            ToolName::TranslateCaptions => "translate_captions",
+            ToolName::ScriptToVideo => "script_to_video",
+            ToolName::GenerateAvatar => "generate_avatar",
+            ToolName::CloneVoice => "clone_voice",
         }
     }
 
-    /// Tools advertised to MCP and in-app Chat in registration order. Provider-
-    /// backed generation and Motion Canvas tools remain known wire names, but
-    /// stay out of discovery until their production backends are connected.
-    pub const ALL: [ToolName; 38] = [
+    /// Base tools advertised to MCP and in-app Chat in registration order.
+    /// Provider-backed generation and Motion tools are appended only when the
+    /// current host reports their respective live capabilities.
+    pub const ALL: [ToolName; 39] = [
         ToolName::GetTimeline,
         ToolName::GetMedia,
         ToolName::InspectMedia,
@@ -140,6 +177,7 @@ impl ToolName {
         ToolName::AutoCutToBeats,
         ToolName::SmartReframe,
         ToolName::TightenSilences,
+        ToolName::RemoveFillerWords,
         ToolName::ImportMedia,
         ToolName::ListFolders,
         ToolName::CreateFolder,
@@ -166,11 +204,31 @@ impl ToolName {
         ToolName::UpscaleMedia,
     ];
 
+    /// Motion tools appended only by a host with a production render/import/
+    /// placement bridge. They remain known for strict compatibility parsing in
+    /// all other hosts.
+    pub const MOTION: [ToolName; 2] = [ToolName::AddMotionGraphic, ToolName::EditMotionGraphic];
+
+    /// Advanced workflows are schema-known but never unconditionally
+    /// advertised. The desktop host appends only the exact capabilities backed
+    /// by installed local models or a configured provider.
+    pub const ADVANCED_AI: [ToolName; 9] = [
+        ToolName::TrackMotion,
+        ToolName::GenerateMatte,
+        ToolName::RemoveObject,
+        ToolName::MatchColor,
+        ToolName::SeparateStems,
+        ToolName::TranslateCaptions,
+        ToolName::ScriptToVideo,
+        ToolName::GenerateAvatar,
+        ToolName::CloneVoice,
+    ];
+
     /// Every recognized schema/wire name, including capabilities deliberately
     /// hidden from discovery until a real backend exists. Keeping this set lets
     /// strict argument validation and compatibility tests cover future tools
     /// without advertising placeholder behavior to models.
-    pub const KNOWN: [ToolName; 44] = [
+    pub const KNOWN: [ToolName; 54] = [
         ToolName::GetTimeline,
         ToolName::GetMedia,
         ToolName::InspectMedia,
@@ -194,6 +252,7 @@ impl ToolName {
         ToolName::AutoCutToBeats,
         ToolName::SmartReframe,
         ToolName::TightenSilences,
+        ToolName::RemoveFillerWords,
         ToolName::GenerateVideo,
         ToolName::GenerateImage,
         ToolName::GenerateAudio,
@@ -215,6 +274,15 @@ impl ToolName {
         ToolName::ApplyEffect,
         ToolName::AddMotionGraphic,
         ToolName::EditMotionGraphic,
+        ToolName::TrackMotion,
+        ToolName::GenerateMatte,
+        ToolName::RemoveObject,
+        ToolName::MatchColor,
+        ToolName::SeparateStems,
+        ToolName::TranslateCaptions,
+        ToolName::ScriptToVideo,
+        ToolName::GenerateAvatar,
+        ToolName::CloneVoice,
     ];
 
     /// The 31 upstream-equivalent tools (Issue #9's "31 tools").
@@ -274,25 +342,37 @@ mod tests {
     }
 
     #[test]
-    fn advertised_set_is_38_and_known_set_is_44() {
-        assert_eq!(ToolName::ALL.len(), 38);
-        assert_eq!(ToolName::KNOWN.len(), 44);
+    fn advertised_set_is_39_and_known_set_is_54() {
+        assert_eq!(ToolName::ALL.len(), 39);
+        assert_eq!(ToolName::KNOWN.len(), 54);
         assert!(ToolName::ALL
             .iter()
             .all(|tool| ToolName::KNOWN.contains(tool)));
     }
 
+    #[test]
+    fn advanced_ai_tools_are_known_but_capability_gated() {
+        for tool in ToolName::ADVANCED_AI {
+            assert_eq!(ToolName::from_str(tool.as_str()), Ok(tool));
+            assert!(ToolName::KNOWN.contains(&tool));
+            assert!(!ToolName::ALL.contains(&tool));
+            assert!(!ToolName::UPSTREAM.contains(&tool));
+        }
+    }
+
     #[test]
     fn analysis_tools_have_expected_wire_names() {
         assert_eq!(ToolName::DetectBeats.as_str(), "detect_beats");
         assert_eq!(ToolName::AutoCutToBeats.as_str(), "auto_cut_to_beats");
         assert_eq!(ToolName::SmartReframe.as_str(), "smart_reframe");
         assert_eq!(ToolName::TightenSilences.as_str(), "tighten_silences");
+        assert_eq!(ToolName::RemoveFillerWords.as_str(), "remove_filler_words");
         for t in [
             ToolName::DetectBeats,
             ToolName::AutoCutToBeats,
             ToolName::SmartReframe,
             ToolName::TightenSilences,
+            ToolName::RemoveFillerWords,
         ] {
             assert_eq!(ToolName::from_str(t.as_str()), Ok(t));
             assert!(!ToolName::UPSTREAM.contains(&t));
@@ -307,8 +387,8 @@ mod tests {
         for t in [ToolName::AddMotionGraphic, ToolName::EditMotionGraphic] {
             assert_eq!(ToolName::from_str(t.as_str()), Ok(t));
         }
-        // They remain known for schema compatibility, but are not advertised
-        // until the production Motion Canvas renderer is wired.
+        // They stay out of the unconditional base catalog: a capable desktop
+        // host appends MOTION, while non-rendering hosts remain fail-closed.
         assert_eq!(
             ToolName::KNOWN
                 .iter()
diff --git a/crates/opentake-agent/src/tools/result.rs b/crates/opentake-agent/src/tools/result.rs
index c5d647ee..c9c5f20c 100644
--- a/crates/opentake-agent/src/tools/result.rs
+++ b/crates/opentake-agent/src/tools/result.rs
@@ -53,6 +53,7 @@ pub(crate) enum PublicErrorKind {
     InvalidArguments(ToolName),
     ResourceNotFound(ToolName),
     CapabilityUnavailable(ToolName),
+    AnalysisLowConfidence(ToolName),
 }
 
 impl PublicErrorKind {
@@ -62,6 +63,7 @@ impl PublicErrorKind {
             Self::InvalidArguments(_) => "MCP_INVALID_ARGUMENTS",
             Self::ResourceNotFound(_) => "MCP_RESOURCE_NOT_FOUND",
             Self::CapabilityUnavailable(_) => "MCP_CAPABILITY_UNAVAILABLE",
+            Self::AnalysisLowConfidence(_) => "MCP_ANALYSIS_LOW_CONFIDENCE",
         }
     }
 
@@ -73,6 +75,9 @@ impl PublicErrorKind {
             Self::CapabilityUnavailable(_) => {
                 "This capability is unavailable for the referenced media."
             }
+            Self::AnalysisLowConfidence(_) => {
+                "The analysis could not identify the requested subject reliably."
+            }
         }
     }
 
@@ -86,6 +91,9 @@ impl PublicErrorKind {
             Self::CapabilityUnavailable(_) => {
                 "Use a supported source type or restore the source media, then retry."
             }
+            Self::AnalysisLowConfidence(_) => {
+                "Choose a tighter, higher-contrast subject region and retry."
+            }
         }
     }
 }
diff --git a/crates/opentake-agent/tests/advanced_ai_workflows.rs b/crates/opentake-agent/tests/advanced_ai_workflows.rs
new file mode 100644
index 00000000..cc6eb91d
--- /dev/null
+++ b/crates/opentake-agent/tests/advanced_ai_workflows.rs
@@ -0,0 +1,157 @@
+use std::path::PathBuf;
+use std::sync::{Arc, RwLock};
+
+use opentake_agent::mcp::advanced::{
+    AdvancedWorkflowBridge, AdvancedWorkflowCommit, AdvancedWorkflowError, AdvancedWorkflowRequest,
+};
+use opentake_agent::mcp::core_handle::CoreHandle;
+use opentake_agent::mcp::dispatch::Dispatcher;
+use opentake_agent::plugin::registry::PluginRegistry;
+use opentake_agent::tools::names::ToolName;
+use opentake_domain::{MediaManifest, Timeline};
+use opentake_ops::{EditCommand, EditResult};
+use serde_json::{json, Value};
+
+struct ReadOnlyHandle;
+
+impl CoreHandle for ReadOnlyHandle {
+    fn timeline(&self) -> Timeline {
+        Timeline::new()
+    }
+
+    fn media(&self) -> MediaManifest {
+        MediaManifest::new()
+    }
+
+    fn apply(&self, _cmd: EditCommand) -> anyhow::Result<EditResult> {
+        anyhow::bail!("advanced workflow fixture is read-only")
+    }
+
+    fn project_dir(&self) -> Option<PathBuf> {
+        None
+    }
+}
+
+struct DeterministicAdvancedBridge;
+
+impl AdvancedWorkflowBridge for DeterministicAdvancedBridge {
+    fn supported_tools(&self) -> Vec<ToolName> {
+        ToolName::ADVANCED_AI.to_vec()
+    }
+
+    fn execute(
+        &self,
+        request: AdvancedWorkflowRequest,
+        _cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        Ok(AdvancedWorkflowCommit {
+            result: json!({"tool": request.tool().as_str(), "status": "completed"}),
+            action_name: None,
+        })
+    }
+}
+
+fn dispatcher(advanced: bool) -> Dispatcher {
+    Dispatcher::with_all_capability_bridges(
+        Arc::new(ReadOnlyHandle),
+        Arc::new(RwLock::new(PluginRegistry::new())),
+        None,
+        None,
+        None,
+        advanced.then(|| Arc::new(DeterministicAdvancedBridge) as Arc<dyn AdvancedWorkflowBridge>),
+    )
+}
+
+fn cases() -> [(ToolName, Value); 9] {
+    [
+        (
+            ToolName::TrackMotion,
+            json!({"clipId":"clip","region":{"x":0.1,"y":0.1,"width":0.2,"height":0.2}}),
+        ),
+        (ToolName::GenerateMatte, json!({"clipId":"clip"})),
+        (
+            ToolName::RemoveObject,
+            json!({"clipId":"clip","maskId":"mask"}),
+        ),
+        (
+            ToolName::MatchColor,
+            json!({"clipId":"clip","referenceMediaRef":"asset"}),
+        ),
+        (ToolName::SeparateStems, json!({"mediaRef":"asset"})),
+        (
+            ToolName::TranslateCaptions,
+            json!({"captionClipIds":["caption"],"targetLocale":"zh-CN"}),
+        ),
+        (
+            ToolName::ScriptToVideo,
+            json!({"segments":[{"script":"intro","mediaRef":"asset","durationFrames":30}]}),
+        ),
+        (
+            ToolName::GenerateAvatar,
+            json!({"portraitMediaRef":"portrait","audioMediaRef":"audio","consentId":"consent","costAuthorized":true}),
+        ),
+        (
+            ToolName::CloneVoice,
+            json!({"action":"revoke","consentId":"consent","voiceId":"voice"}),
+        ),
+    ]
+}
+
+#[test]
+fn advanced_ai_workflows_are_hidden_without_a_live_host() {
+    let dispatcher = dispatcher(false);
+    for (tool, args) in cases() {
+        assert!(!dispatcher.advertised_tools().contains(&tool));
+        let result = dispatcher.dispatch(tool.as_str(), args);
+        assert!(result.is_error);
+        assert!(result.text_joined().contains("not advertised"));
+    }
+}
+
+#[test]
+fn advanced_ai_workflows_route_through_exact_tool_contracts() {
+    let dispatcher = dispatcher(true);
+    for (tool, args) in cases() {
+        assert!(ToolName::KNOWN.contains(&tool));
+        assert!(dispatcher.advertised_tools().contains(&tool));
+        let result = dispatcher.dispatch(tool.as_str(), args);
+        assert!(
+            !result.is_error,
+            "{}: {}",
+            tool.as_str(),
+            result.text_joined()
+        );
+        assert!(result.text_joined().contains(tool.as_str()));
+        assert!(result.text_joined().contains("completed"));
+    }
+
+    for tool in [ToolName::TightenSilences, ToolName::RemoveFillerWords] {
+        assert!(ToolName::ALL.contains(&tool));
+    }
+}
+
+#[test]
+fn advanced_nested_contracts_reject_unknown_fields_before_host_execution() {
+    let dispatcher = dispatcher(true);
+    let result = dispatcher.dispatch(
+        "track_motion",
+        json!({"clipId":"clip","region":{"x":0.0,"y":0.0,"width":1.0,"height":1.0,"secret":true}}),
+    );
+    assert!(result.is_error);
+    assert!(
+        result.text_joined().contains("region:") && result.text_joined().contains("'secret'"),
+        "{}",
+        result.text_joined()
+    );
+
+    let result = dispatcher.dispatch(
+        "script_to_video",
+        json!({"segments":[{"script":"x","mediaRef":"asset","durationFrames":30,"secret":true}]}),
+    );
+    assert!(result.is_error);
+    assert!(
+        result.text_joined().contains("segments[0]:") && result.text_joined().contains("'secret'"),
+        "{}",
+        result.text_joined()
+    );
+}
diff --git a/crates/opentake-agent/tests/advertised_tool_acceptance.rs b/crates/opentake-agent/tests/advertised_tool_acceptance.rs
index 19526565..703efc25 100644
--- a/crates/opentake-agent/tests/advertised_tool_acceptance.rs
+++ b/crates/opentake-agent/tests/advertised_tool_acceptance.rs
@@ -3,6 +3,10 @@ use std::sync::{Arc, RwLock};
 
 use opentake_agent::mcp::core_handle::CoreHandle;
 use opentake_agent::mcp::dispatch::Dispatcher;
+use opentake_agent::mcp::motion::{
+    AddMotionRequest, EditMotionRequest, MotionBridge, MotionBridgeError, MotionCommit,
+    MotionOutputMetadata,
+};
 use opentake_agent::plugin::registry::PluginRegistry;
 use opentake_agent::tools::names::ToolName;
 use opentake_domain::{MediaManifest, Timeline};
@@ -10,6 +14,56 @@ use opentake_ops::{EditCommand, EditResult};
 
 struct ReadOnlyHandle;
 
+struct DeterministicMotionBridge;
+
+fn output_metadata(content_hash: &str) -> MotionOutputMetadata {
+    MotionOutputMetadata {
+        renderer: "fixture".into(),
+        renderer_version: "1".into(),
+        output_file: "output.mp4".into(),
+        fps: 30.0,
+        width: 64,
+        height: 36,
+        duration_frames: 30,
+        duration_seconds: 1.0,
+        content_hash: content_hash.into(),
+    }
+}
+
+impl MotionBridge for DeterministicMotionBridge {
+    fn can_render_motion(&self) -> bool {
+        true
+    }
+
+    fn add(
+        &self,
+        _request: AddMotionRequest,
+        _cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError> {
+        Ok(MotionCommit {
+            clip_id: "motion-clip".into(),
+            asset_id: "motion-asset".into(),
+            content_hash: "add-hash".into(),
+            action_name: "Add Motion Graphic".into(),
+            output: output_metadata("add-hash"),
+        })
+    }
+
+    fn edit(
+        &self,
+        request: EditMotionRequest,
+        _cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError> {
+        Ok(MotionCommit {
+            clip_id: request.clip_id,
+            asset_id: "edited-motion-asset".into(),
+            content_hash: "edit-hash".into(),
+            action_name: "Edit Motion Graphic".into(),
+            output: output_metadata("edit-hash"),
+        })
+    }
+}
+
 impl CoreHandle for ReadOnlyHandle {
     fn timeline(&self) -> Timeline {
         Timeline::new()
@@ -30,9 +84,12 @@ impl CoreHandle for ReadOnlyHandle {
 
 #[test]
 fn every_advertised_tool_is_live_or_absent() {
-    let dispatcher = Dispatcher::new(
+    let dispatcher = Dispatcher::with_capability_bridges(
         Arc::new(ReadOnlyHandle),
         Arc::new(RwLock::new(PluginRegistry::new())),
+        None,
+        None,
+        Some(Arc::new(DeterministicMotionBridge)),
     );
     let cases = [
         (
@@ -68,9 +125,10 @@ fn every_advertised_tool_is_live_or_absent() {
             serde_json::json!({"clipId": "clip", "code": "export default {}"}),
         ),
     ];
+    let advertised = dispatcher.advertised_tools();
 
     for (tool, args) in cases {
-        if !ToolName::ALL.contains(&tool) {
+        if !advertised.contains(&tool) {
             let result = dispatcher.dispatch(tool.as_str(), args);
             assert!(
                 result.text_joined().contains("not advertised"),
@@ -87,5 +145,23 @@ fn every_advertised_tool_is_live_or_absent() {
             tool.as_str(),
             result.text_joined()
         );
+        assert!(
+            !result.text_joined().contains("not advertised"),
+            "{} was advertised but dispatch rejected it: {}",
+            tool.as_str(),
+            result.text_joined()
+        );
+    }
+}
+
+#[test]
+fn motion_tools_are_absent_without_a_live_host_bridge() {
+    let dispatcher = Dispatcher::new(
+        Arc::new(ReadOnlyHandle),
+        Arc::new(RwLock::new(PluginRegistry::new())),
+    );
+
+    for tool in ToolName::MOTION {
+        assert!(!dispatcher.advertised_tools().contains(&tool));
     }
 }
diff --git a/crates/opentake-agent/tests/completion_43312d5e9f613913.rs b/crates/opentake-agent/tests/completion_43312d5e9f613913.rs
new file mode 100644
index 00000000..32653bbd
--- /dev/null
+++ b/crates/opentake-agent/tests/completion_43312d5e9f613913.rs
@@ -0,0 +1,76 @@
+use std::path::PathBuf;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::{Arc, Mutex, RwLock};
+
+use opentake_agent::mcp::core_handle::CoreHandle;
+use opentake_agent::mcp::dispatch::Dispatcher;
+use opentake_agent::plugin::registry::PluginRegistry;
+use opentake_domain::{Clip, ClipType, MediaManifest, Timeline, Track};
+use opentake_ops::{apply as ops_apply, EditCommand, EditResult, EditorState, SeqIdGen};
+
+struct RecordingCore {
+    state: Mutex<EditorState>,
+    apply_calls: AtomicUsize,
+}
+
+impl RecordingCore {
+    fn new() -> Self {
+        let mut timeline = Timeline::new();
+        let mut track = Track::new("video-track", ClipType::Video);
+        track.clips.push(Clip::new("clip-a", "asset-a", 0, 30));
+        timeline.tracks.push(track);
+        Self {
+            state: Mutex::new(EditorState::new(timeline, MediaManifest::new())),
+            apply_calls: AtomicUsize::new(0),
+        }
+    }
+}
+
+impl CoreHandle for RecordingCore {
+    fn timeline(&self) -> Timeline {
+        self.state.lock().expect("state lock").timeline.clone()
+    }
+
+    fn media(&self) -> MediaManifest {
+        self.state.lock().expect("state lock").manifest.clone()
+    }
+
+    fn apply(&self, command: EditCommand) -> anyhow::Result<EditResult> {
+        self.apply_calls.fetch_add(1, Ordering::SeqCst);
+        ops_apply(
+            &mut self.state.lock().expect("state lock"),
+            command,
+            &SeqIdGen::new("contract-"),
+        )
+        .map_err(|error| anyhow::anyhow!(error.to_string()))
+    }
+
+    fn project_dir(&self) -> Option<PathBuf> {
+        None
+    }
+}
+
+#[test]
+fn completion_43312d5e9f613913_tauri_exposes_typed_core_edit_commands_with_stab() {
+    let core = Arc::new(RecordingCore::new());
+    let dispatcher = Dispatcher::new(core.clone(), Arc::new(RwLock::new(PluginRegistry::new())));
+    let before = core.timeline();
+
+    let malformed = dispatcher.dispatch(
+        "remove_clips",
+        serde_json::json!({"clipIds": "not-an-array", "hostPath": "/private/secret"}),
+    );
+    assert!(malformed.is_error);
+    assert_eq!(core.apply_calls.load(Ordering::SeqCst), 0);
+    assert_eq!(core.timeline(), before);
+    assert!(!malformed.text_joined().contains("/private/secret"));
+
+    let valid = dispatcher.dispatch("remove_clips", serde_json::json!({"clipIds": ["clip-a"]}));
+    assert!(!valid.is_error, "{}", valid.text_joined());
+    assert_eq!(core.apply_calls.load(Ordering::SeqCst), 1);
+    assert!(core
+        .timeline()
+        .tracks
+        .iter()
+        .all(|track| track.clips.is_empty()));
+}
diff --git a/crates/opentake-agent/tests/editing_automation_acceptance.rs b/crates/opentake-agent/tests/editing_automation_acceptance.rs
new file mode 100644
index 00000000..e3afc7aa
--- /dev/null
+++ b/crates/opentake-agent/tests/editing_automation_acceptance.rs
@@ -0,0 +1,236 @@
+use std::path::PathBuf;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::{Arc, Mutex, RwLock};
+
+use opentake_agent::mcp::core_handle::CoreHandle;
+use opentake_agent::mcp::dispatch::Dispatcher;
+use opentake_agent::plugin::registry::PluginRegistry;
+use opentake_domain::{
+    Clip, ClipType, Crop, MediaManifest, MediaManifestEntry, MediaSource, Timeline, Track,
+};
+use opentake_media::analysis::{
+    detect_autocrop, detect_beats, AutocropConfig, BeatDetectionConfig, FrameBuffer, PixelFormat,
+};
+use opentake_media::{PcmBuffer, PcmFormat, PcmSpec};
+use opentake_ops::intent::{plan_beat_sync_placement, plan_smart_reframe, IntentClipEntry};
+use opentake_ops::{apply as ops_apply, EditCommand, EditResult, EditorState, SeqIdGen};
+
+struct AutomationHandle {
+    state: Mutex<EditorState>,
+    pcm: PcmBuffer,
+    apply_calls: AtomicUsize,
+}
+
+impl AutomationHandle {
+    fn new() -> Self {
+        let mut timeline = Timeline::new();
+        timeline.fps = 10;
+        let mut track = Track::new("video-track", ClipType::Video);
+        track.clips.push(Clip::new("clip-a", "asset-1", 0, 10));
+        timeline.tracks.push(track);
+
+        let mut manifest = MediaManifest::new();
+        manifest.entries.push(MediaManifestEntry {
+            id: "asset-1".into(),
+            name: "Source.mov".into(),
+            kind: ClipType::Video,
+            source: MediaSource::External {
+                absolute_path: "/fixture/Source.mov".into(),
+            },
+            duration: 1.0,
+            generation_input: None,
+            source_width: Some(1920),
+            source_height: Some(1080),
+            source_fps: Some(10.0),
+            has_audio: Some(true),
+            color: None,
+            proxy: None,
+            folder_id: None,
+            cached_remote_url: None,
+            cached_remote_url_expires_at: None,
+        });
+
+        let mut samples = vec![0.5; 300];
+        samples.extend(std::iter::repeat_n(0.0, 400));
+        samples.extend(std::iter::repeat_n(0.5, 300));
+        Self {
+            state: Mutex::new(EditorState::new(timeline, manifest)),
+            pcm: PcmBuffer {
+                spec: PcmSpec {
+                    sample_rate: 1_000,
+                    channels: 1,
+                    format: PcmFormat::F32,
+                },
+                samples_f32: samples,
+            },
+            apply_calls: AtomicUsize::new(0),
+        }
+    }
+}
+
+impl CoreHandle for AutomationHandle {
+    fn timeline(&self) -> Timeline {
+        self.state.lock().expect("state lock").timeline.clone()
+    }
+
+    fn media(&self) -> MediaManifest {
+        self.state.lock().expect("state lock").manifest.clone()
+    }
+
+    fn apply(&self, command: EditCommand) -> anyhow::Result<EditResult> {
+        self.apply_calls.fetch_add(1, Ordering::AcqRel);
+        let ids = SeqIdGen::new("automation-");
+        ops_apply(&mut self.state.lock().expect("state lock"), command, &ids)
+            .map_err(|error| anyhow::anyhow!(error.to_string()))
+    }
+
+    fn project_dir(&self) -> Option<PathBuf> {
+        None
+    }
+
+    fn extract_analysis_pcm(
+        &self,
+        _media_ref: &str,
+        _spec: PcmSpec,
+        _range: Option<(f64, f64)>,
+    ) -> anyhow::Result<PcmBuffer> {
+        Ok(self.pcm.clone())
+    }
+}
+
+fn first_json(result: &opentake_agent::tools::result::ToolResult) -> serde_json::Value {
+    let text = match &result.content[0] {
+        opentake_agent::tools::result::Block::Text { text } => text,
+        other => panic!("expected JSON text block, got {other:?}"),
+    };
+    serde_json::from_str(text).expect("valid tool JSON")
+}
+
+#[test]
+fn automation_children_are_atomic_reviewable_and_command_routed() {
+    // The media children are deterministic and reject malformed input without
+    // producing a partial proposal.
+    let beat_config = BeatDetectionConfig {
+        sample_rate: 1_000,
+        fps: 10.0,
+        window_size_samples: 100,
+        hop_size_samples: 100,
+        min_onset_strength: 0.05,
+        min_gap_frames: 1,
+    };
+    let mut pulse = vec![0.0; 1_000];
+    pulse[500..530].fill(1.0);
+    assert_eq!(
+        detect_beats(&pulse, beat_config),
+        detect_beats(&pulse, beat_config)
+    );
+    assert!(detect_beats(
+        &pulse,
+        BeatDetectionConfig {
+            sample_rate: 0,
+            ..beat_config
+        }
+    )
+    .is_empty());
+
+    let pixels = [0_u8, 0, 0, 255, 255, 255];
+    let valid_frame = FrameBuffer {
+        width: 2,
+        height: 1,
+        data: &pixels,
+        pixel_format: PixelFormat::Rgb,
+    };
+    assert_eq!(
+        detect_autocrop(&valid_frame, AutocropConfig::default()),
+        detect_autocrop(&valid_frame, AutocropConfig::default())
+    );
+    let truncated = FrameBuffer {
+        data: &pixels[..3],
+        ..valid_frame
+    };
+    assert_eq!(detect_autocrop(&truncated, AutocropConfig::default()), None);
+
+    let handle = Arc::new(AutomationHandle::new());
+    let dispatcher = Dispatcher::new(handle.clone(), Arc::new(RwLock::new(PluginRegistry::new())));
+    let before = handle.timeline();
+
+    // Analysis surfaces return reviewable proposals or typed diagnostics. They
+    // never reach the edit boundary themselves.
+    let beats = dispatcher.dispatch("detect_beats", serde_json::json!({"mediaRef": "asset-1"}));
+    assert!(!beats.is_error, "{}", beats.text_joined());
+    assert_eq!(first_json(&beats)["applied"], false);
+
+    let silences = dispatcher.dispatch(
+        "tighten_silences",
+        serde_json::json!({
+            "clipIds": ["clip-a"],
+            "thresholdDb": -40.0,
+            "minSilenceFrames": 2,
+            "paddingFrames": 0
+        }),
+    );
+    assert!(!silences.is_error, "{}", silences.text_joined());
+    let silence_json = first_json(&silences);
+    assert_eq!(silence_json["applied"], false);
+    assert_eq!(silence_json["commands"][0]["tool"], "ripple_delete_ranges");
+
+    let unavailable = dispatcher.dispatch(
+        "smart_reframe",
+        serde_json::json!({"clipIds": ["clip-a"], "aspectRatio": "9:16"}),
+    );
+    assert!(unavailable.is_error);
+    assert!(unavailable.text_joined().contains("needs vision"));
+    assert_eq!(handle.apply_calls.load(Ordering::Acquire), 0);
+    assert_eq!(handle.timeline(), before);
+
+    // A valid write is normalized to exactly one existing EditCommand. The
+    // command boundary owns the mutation and its single undo restores the exact
+    // prior timeline.
+    let crop = Crop {
+        left: 0.1,
+        top: 0.0,
+        right: 0.1,
+        bottom: 0.0,
+    };
+    let plan = plan_smart_reframe(&["clip-a".into()], crop, None).expect("reframe plan");
+    assert_eq!(plan.label, "smart_reframe");
+    assert_eq!(plan.commands.len(), 1);
+    let applied = handle
+        .apply(plan.commands[0].clone())
+        .expect("atomic command");
+    assert!(applied.changed);
+    assert_eq!(handle.apply_calls.load(Ordering::Acquire), 1);
+    assert_eq!(handle.timeline().tracks[0].clips[0].crop, crop);
+    handle.apply(EditCommand::Undo).expect("single undo");
+    assert_eq!(handle.timeline(), before);
+
+    // Rejected plans are typed, remain command-free, and preserve state.
+    let rejected = plan_smart_reframe(&[], crop, None).expect_err("empty clip ids must fail");
+    assert!(rejected.to_string().contains("empty clipIds"));
+    assert_eq!(handle.timeline(), before);
+
+    let entry = IntentClipEntry {
+        media_ref: "asset-1".into(),
+        media_type: ClipType::Video,
+        source_clip_type: ClipType::Video,
+        track_index: None,
+        start_frame: 0,
+        duration_frames: 5,
+        trim_start_frame: None,
+        trim_end_frame: None,
+        has_audio: true,
+        add_linked_audio: true,
+        transform: None,
+    };
+    let beat_plan =
+        plan_beat_sync_placement(&before, vec![entry.clone()], &[3]).expect("beat placement plan");
+    assert_eq!(beat_plan.commands.len(), 1);
+    assert!(matches!(
+        beat_plan.commands[0],
+        EditCommand::AddClipsAutoTrack { .. }
+    ));
+    let bad_beats =
+        plan_beat_sync_placement(&before, vec![entry], &[]).expect_err("missing beat must fail");
+    assert!(bad_beats.to_string().contains("Need at least 1 beat"));
+    assert_eq!(handle.timeline(), before);
+}
diff --git a/crates/opentake-agent/tests/tool_argument_contract.rs b/crates/opentake-agent/tests/tool_argument_contract.rs
index 96c54b61..cfd4fec1 100644
--- a/crates/opentake-agent/tests/tool_argument_contract.rs
+++ b/crates/opentake-agent/tests/tool_argument_contract.rs
@@ -48,7 +48,7 @@ fn dispatcher() -> (Dispatcher, Arc<AtomicUsize>) {
 }
 
 #[test]
-fn all_tool_schemas_reject_unknown_missing_wrong_type_and_nonfinite() {
+fn all_tool_schemas_reject_unknown_missing_wrong_type() {
     let (dispatcher, apply_calls) = dispatcher();
 
     for tool in ToolName::ALL {
diff --git a/crates/opentake-core/src/core.rs b/crates/opentake-core/src/core.rs
index cfe4f0b7..74f28689 100644
--- a/crates/opentake-core/src/core.rs
+++ b/crates/opentake-core/src/core.rs
@@ -31,8 +31,10 @@ use std::path::{Path, PathBuf};
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::{Arc, Mutex, RwLock, RwLockReadGuard};
 
-use opentake_domain::{MediaManifest, MediaManifestEntry, Timeline};
-use opentake_ops::command::{EditCommand, EditResult};
+use opentake_domain::{
+    ClipType, GenerationInput, MediaAsset, MediaManifest, MediaManifestEntry, MediaProxy, Timeline,
+};
+use opentake_ops::command::{ClipEntry, EditCommand, EditResult};
 use opentake_ops::IdGen;
 use opentake_project::{GenerationLog, ProjectCompatibility};
 use same_file::Handle;
@@ -41,8 +43,8 @@ use crate::deps::CoreDeps;
 use crate::error::{CoreError, Result};
 use crate::events::{CoreEvent, EventBus, SubscriptionId};
 use crate::session::{
-    EditorSession, GenerationJobCommit, GenerationStateUpdate, PreparedGenerationJob,
-    PreparedGenerationOutput, ProbedMedia,
+    DerivedStemProvenance, EditorSession, GenerationJobCommit, GenerationStateUpdate,
+    PreparedGenerationJob, PreparedGenerationOutput, ProbedMedia,
 };
 
 type ProjectIdentityTransitionListener = Arc<dyn Fn(bool) + Send + Sync + 'static>;
@@ -126,6 +128,31 @@ pub struct ProjectRuntimeSnapshot {
     pub version: u64,
 }
 
+/// Placement half of a project-managed motion render commit.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum MotionPlacement {
+    Add {
+        start_frame: i32,
+        duration_frames: i32,
+        track_index: Option<usize>,
+    },
+    Replace {
+        clip_id: String,
+    },
+    /// Replace a clip with a derivative that already contains the result of
+    /// its masks, then clear those editable masks in the same undo snapshot.
+    ReplaceAndClearMasks {
+        clip_id: String,
+    },
+}
+
+/// Result of atomically registering a rendered video and placing/replacing it.
+#[derive(Clone, Debug)]
+pub struct MotionMediaCommit {
+    pub media: MediaManifestEntry,
+    pub edit: EditResult,
+}
+
 /// A folder target in a prepared media-import plan. Planned folders are keyed
 /// by the scanner without consuming application ids; existing folders retain
 /// their authoritative project id.
@@ -150,6 +177,12 @@ pub enum PreparedMediaImportOp {
         probe: ProbedMedia,
         folder: Option<PreparedMediaFolderRef>,
     },
+    ImportDerivedStem {
+        path: PathBuf,
+        name: String,
+        probe: ProbedMedia,
+        provenance: DerivedStemProvenance,
+    },
 }
 
 /// One file admitted by a successful durable batch import.
@@ -509,6 +542,61 @@ impl AppCore {
         self.apply_with_revision(command, Some(expected))
     }
 
+    /// Apply one revision-bound edit and durably save the project under the
+    /// same session lock. Persistence failure restores document, history, and
+    /// version exactly before returning.
+    pub fn apply_at_revision_persisted(
+        &self,
+        expected: ProjectRevision,
+        command: EditCommand,
+    ) -> Result<EditResult> {
+        let (result, project_epoch, media_count, written) = {
+            let mut session = self.lock();
+            if session.project_epoch != expected.project_epoch
+                || session.editor.version() != expected.version
+            {
+                return Err(CoreError::Media(
+                    "project changed while preparing a deferred edit".to_string(),
+                ));
+            }
+            let before = session.editor.checkpoint_editor_state();
+            let outcome = (|| {
+                let result = session.editor.apply(command, self.ids.as_ref())?;
+                let media_count = result
+                    .manifest_changed
+                    .then(|| session.editor.media().entries.len());
+                let written = session.editor.save_project(None)?;
+                Ok((result, media_count, written))
+            })();
+            match outcome {
+                Ok((result, media_count, written)) => {
+                    (result, session.project_epoch, media_count, written)
+                }
+                Err(error) => {
+                    session.editor.restore_editor_state(before);
+                    return Err(error);
+                }
+            }
+        };
+        if result.changed {
+            self.events.emit(&CoreEvent::TimelineChanged {
+                project_epoch,
+                version: result.timeline_version,
+            });
+        }
+        if let Some(count) = media_count {
+            self.events.emit(&CoreEvent::MediaChanged {
+                project_epoch,
+                count,
+            });
+        }
+        self.events.emit(&CoreEvent::ProjectSaved {
+            path: written.to_string_lossy().into_owned(),
+            project_epoch,
+        });
+        Ok(result)
+    }
+
     fn apply_with_revision(
         &self,
         command: EditCommand,
@@ -922,6 +1010,178 @@ impl AppCore {
         Ok(entry)
     }
 
+    /// Atomically register a completed project-managed motion render and place
+    /// or replace its timeline clip.
+    #[allow(clippy::too_many_arguments)]
+    pub fn commit_motion_media_for_project(
+        &self,
+        expected_project_epoch: u64,
+        expected_version: u64,
+        expected_project_dir: &Path,
+        path: impl AsRef<Path>,
+        name: impl Into<String>,
+        probe: &ProbedMedia,
+        provenance: GenerationInput,
+        placement: MotionPlacement,
+    ) -> Result<MotionMediaCommit> {
+        self.commit_generated_media_for_project(
+            expected_project_epoch,
+            expected_version,
+            expected_project_dir,
+            path,
+            name,
+            ClipType::Video,
+            probe,
+            provenance,
+            placement,
+            "Add Motion Graphic",
+        )
+    }
+
+    /// Atomically register a completed generated audio/video file and place or
+    /// replace its timeline clip. The generated file must already be a
+    /// regular, non-symlink child of the active bundle's `media/` directory.
+    /// The document command and project save share the session lock; any command
+    /// or persistence failure restores timeline, manifest, undo/redo, and
+    /// version exactly. A stale document version is rejected under that same
+    /// lock. Events are emitted only after the durable save succeeds.
+    #[allow(clippy::too_many_arguments)]
+    pub fn commit_generated_media_for_project(
+        &self,
+        expected_project_epoch: u64,
+        expected_version: u64,
+        expected_project_dir: &Path,
+        path: impl AsRef<Path>,
+        name: impl Into<String>,
+        kind: ClipType,
+        probe: &ProbedMedia,
+        provenance: GenerationInput,
+        placement: MotionPlacement,
+        action_name: &str,
+    ) -> Result<MotionMediaCommit> {
+        let path = path.as_ref();
+        let media_dir = expected_project_dir.join(opentake_project::layout::MEDIA_DIR);
+        if path.parent() != Some(media_dir.as_path())
+            || path.file_name().is_none()
+            || path.components().any(|component| {
+                matches!(
+                    component,
+                    std::path::Component::ParentDir | std::path::Component::CurDir
+                )
+            })
+        {
+            return Err(CoreError::Media(
+                "generated output must be one direct child of the active project media directory"
+                    .into(),
+            ));
+        }
+        let metadata = std::fs::symlink_metadata(path)
+            .map_err(|error| CoreError::Media(format!("motion output metadata failed: {error}")))?;
+        if !metadata.file_type().is_file() || metadata.file_type().is_symlink() {
+            return Err(CoreError::Media(
+                "generated output must be a regular non-symlink file".into(),
+            ));
+        }
+
+        let (commit, count, written) = {
+            let mut session = self.lock();
+            ensure_project_identity(&session, expected_project_epoch, expected_project_dir)?;
+            if session.editor.version() != expected_version {
+                return Err(CoreError::Media(
+                    "project changed while preparing a generated-media edit".into(),
+                ));
+            }
+            session.editor.ensure_mutable()?;
+            let before = session.editor.checkpoint_editor_state();
+            let id = loop {
+                let candidate = self.ids.next_id();
+                if session.editor.media_entry(&candidate).is_none() {
+                    break candidate;
+                }
+            };
+
+            let result = (|| {
+                if !matches!(kind, ClipType::Audio | ClipType::Video) {
+                    return Err(CoreError::Media(
+                        "generated placement supports audio or video".into(),
+                    ));
+                }
+                let mut asset = MediaAsset::new(id, path, kind, name, probe.duration_secs);
+                asset.source_width = probe.width;
+                asset.source_height = probe.height;
+                asset.source_fps = probe.fps;
+                asset.color = probe.color.clone();
+                asset.has_audio = probe.has_audio;
+                asset.generation_input = Some(provenance);
+                let media = asset.to_manifest_entry(Some(expected_project_dir), 0.0);
+
+                let command = match placement {
+                    MotionPlacement::Add {
+                        start_frame,
+                        duration_frames,
+                        track_index,
+                    } => EditCommand::RegisterMediaAndAddClip {
+                        entry: ClipEntry {
+                            media_ref: media.id.clone(),
+                            media_type: kind,
+                            source_clip_type: kind,
+                            track_index: track_index.unwrap_or(0),
+                            start_frame,
+                            duration_frames,
+                            trim_start_frame: None,
+                            trim_end_frame: None,
+                            has_audio: probe.has_audio,
+                            add_linked_audio: false,
+                            transform: None,
+                        },
+                        media: media.clone(),
+                        auto_track: track_index.is_none(),
+                    },
+                    MotionPlacement::Replace { clip_id } => EditCommand::RegisterMediaAndSwapClip {
+                        media: media.clone(),
+                        clip_id,
+                    },
+                    MotionPlacement::ReplaceAndClearMasks { clip_id } => {
+                        EditCommand::RegisterMediaAndSwapClipClearingMasks {
+                            media: media.clone(),
+                            clip_id,
+                        }
+                    }
+                };
+                let mut edit = session.editor.apply(command, self.ids.as_ref())?;
+                edit.action_name = action_name.to_string();
+                edit.summary = format!("{} generated media clip(s)", edit.affected_clip_ids.len());
+                let written = session.editor.save_project(None)?;
+                Ok((MotionMediaCommit { media, edit }, written))
+            })();
+
+            match result {
+                Ok((commit, written)) => {
+                    let count = session.editor.media().entries.len();
+                    (commit, count, written)
+                }
+                Err(error) => {
+                    session.editor.restore_editor_state(before);
+                    return Err(error);
+                }
+            }
+        };
+
+        self.events.emit(&CoreEvent::TimelineChanged {
+            project_epoch: expected_project_epoch,
+            version: commit.edit.timeline_version,
+        });
+        self.events.emit(&CoreEvent::MediaChanged {
+            project_epoch: expected_project_epoch,
+            count,
+        });
+        self.events.emit(&CoreEvent::ProjectSaved {
+            path: written.to_string_lossy().into_owned(),
+            project_epoch: expected_project_epoch,
+        });
+        Ok(commit)
+    }
+
     /// Commit a fully probed media-import plan as one project-bound durable
     /// transaction. The session lock covers identity validation, all manifest
     /// edits, and the atomic `media.json` write. Any failure restores the exact
@@ -1008,6 +1268,18 @@ impl AppCore {
                             }
                             imports.push(CommittedMediaImport { path, entry });
                         }
+                        PreparedMediaImportOp::ImportDerivedStem {
+                            path,
+                            name,
+                            probe,
+                            provenance,
+                        } => {
+                            let id = self.ids.next_id();
+                            let entry = session
+                                .editor
+                                .import_derived_stem_file(&path, id, name, &probe, provenance)?;
+                            imports.push(CommittedMediaImport { path, entry });
+                        }
                     }
                 }
 
@@ -1330,6 +1602,41 @@ impl AppCore {
         Ok(changed)
     }
 
+    /// Persist one asset's playback proxy as an atomic manifest mutation.
+    /// Failure to write restores the in-memory manifest before the lock is
+    /// released, so UI and disk never disagree about proxy availability.
+    pub fn set_media_proxy_for_project(
+        &self,
+        expected_project_epoch: u64,
+        expected_project_dir: &Path,
+        asset_id: &str,
+        proxy: Option<MediaProxy>,
+    ) -> Result<MediaManifestEntry> {
+        let (entry, count, written) = {
+            let mut session = self.lock();
+            ensure_project_identity(&session, expected_project_epoch, expected_project_dir)?;
+            let before = session.editor.media();
+            let entry = session.editor.set_media_proxy(asset_id, proxy)?;
+            let count = session.editor.media().entries.len();
+            match session.editor.save_media_manifest() {
+                Ok(written) => (entry, count, written),
+                Err(error) => {
+                    session.editor.restore_media(before);
+                    return Err(error);
+                }
+            }
+        };
+        self.events.emit(&CoreEvent::MediaChanged {
+            project_epoch: expected_project_epoch,
+            count,
+        });
+        self.events.emit(&CoreEvent::ProjectSaved {
+            path: written.to_string_lossy().into_owned(),
+            project_epoch: expected_project_epoch,
+        });
+        Ok(entry)
+    }
+
     /// Set or clear one project's global-favorite mapping, emitting the same
     /// media-change signal used by other manifest mutations.
     pub fn set_media_global_favorite(
@@ -1547,16 +1854,34 @@ impl AppCore {
         path: impl AsRef<std::path::Path>,
         probe: &ProbedMedia,
     ) -> Result<MediaManifestEntry> {
-        let (entry, count, project_epoch) = {
+        let (entry, count, project_epoch, saved) = {
             let mut session = self.lock();
+            let before = session.editor.media();
             let entry = session.editor.relink_media_file(asset_id, path, probe)?;
             let count = session.editor.media().entries.len();
-            (entry, count, session.project_epoch)
+            let saved = if session.editor.project_dir().is_some() {
+                match session.editor.save_media_manifest() {
+                    Ok(path) => Some(path),
+                    Err(error) => {
+                        session.editor.restore_media(before);
+                        return Err(error);
+                    }
+                }
+            } else {
+                None
+            };
+            (entry, count, session.project_epoch, saved)
         };
         self.events.emit(&CoreEvent::MediaChanged {
             project_epoch,
             count,
         });
+        if let Some(path) = saved {
+            self.events.emit(&CoreEvent::ProjectSaved {
+                path: path.to_string_lossy().into_owned(),
+                project_epoch,
+            });
+        }
         Ok(entry)
     }
 
@@ -1576,7 +1901,7 @@ impl AppCore {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use opentake_domain::{ClipType, Timeline, Track};
+    use opentake_domain::{ClipType, MediaColorMetadata, MediaProxy, Timeline, Track};
     use opentake_ops::command::ClipEntry;
     use std::sync::Mutex;
 
@@ -1592,6 +1917,189 @@ mod tests {
         core
     }
 
+    #[test]
+    fn motion_media_commit_is_durable_atomic_and_one_step_undoable() {
+        let bundle = project_bundle("motion-commit");
+        let core = AppCore::new();
+        core.open_project(&bundle).unwrap();
+        let media_dir = opentake_project::layout::media_dir(&bundle);
+        std::fs::create_dir_all(&media_dir).unwrap();
+        let rendered = media_dir.join("motion-a.mp4");
+        std::fs::write(&rendered, b"validated-render-fixture").unwrap();
+        let snapshot = core.runtime_snapshot();
+        let probe = ProbedMedia {
+            duration_secs: 1.0,
+            width: Some(64),
+            height: Some(36),
+            fps: Some(30.0),
+            has_audio: false,
+            color: None,
+        };
+
+        let committed = core
+            .commit_motion_media_for_project(
+                snapshot.project_epoch,
+                snapshot.version,
+                &bundle,
+                &rendered,
+                "Motion A",
+                &probe,
+                GenerationInput {
+                    prompt: "{\"templateId\":\"title-card\"}".into(),
+                    model: "opentake.motion-canvas".into(),
+                    duration: 30,
+                    aspect_ratio: "64:36".into(),
+                    provider: Some("opentake-motion".into()),
+                    status: Some(opentake_domain::GenerationJobStatus::Ready),
+                    ..GenerationInput::default()
+                },
+                MotionPlacement::Add {
+                    start_frame: 0,
+                    duration_frames: 30,
+                    track_index: Some(0),
+                },
+            )
+            .unwrap();
+        assert_eq!(committed.edit.action_name, "Add Motion Graphic");
+        assert_eq!(core.media().entries.len(), 2);
+        assert_eq!(core.get_timeline().timeline.tracks[0].clips.len(), 1);
+
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        assert_eq!(reopened.media().entries.len(), 2);
+        assert_eq!(reopened.get_timeline().timeline.tracks[0].clips.len(), 1);
+
+        core.undo().unwrap();
+        assert_eq!(core.media().entries.len(), 1);
+        assert!(core.get_timeline().timeline.tracks[0].clips.is_empty());
+        let _ = std::fs::remove_dir_all(bundle);
+    }
+
+    #[test]
+    fn generated_media_commit_refuses_version_drift_without_mutation() {
+        let bundle = project_bundle("generated-version-drift");
+        let core = AppCore::new();
+        core.open_project(&bundle).unwrap();
+        let media_dir = opentake_project::layout::media_dir(&bundle);
+        std::fs::create_dir_all(&media_dir).unwrap();
+        let rendered = media_dir.join("stale-render.mp4");
+        std::fs::write(&rendered, b"validated-render-fixture").unwrap();
+        let stale = core.runtime_snapshot();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 24,
+            width: 1280,
+            height: 720,
+        })
+        .unwrap();
+        let before_commit = core.runtime_snapshot();
+
+        let error = core
+            .commit_motion_media_for_project(
+                stale.project_epoch,
+                stale.version,
+                &bundle,
+                &rendered,
+                "Stale Render",
+                &ProbedMedia::default(),
+                GenerationInput::default(),
+                MotionPlacement::Add {
+                    start_frame: 0,
+                    duration_frames: 1,
+                    track_index: Some(0),
+                },
+            )
+            .unwrap_err();
+        assert!(error
+            .to_string()
+            .contains("project changed while preparing a generated-media edit"));
+        let after_commit = core.runtime_snapshot();
+        assert_eq!(after_commit.timeline, before_commit.timeline);
+        assert_eq!(after_commit.media, before_commit.media);
+        assert_eq!(after_commit.version, before_commit.version);
+
+        let _ = std::fs::remove_dir_all(bundle);
+    }
+
+    #[test]
+    fn motion_media_commit_rejects_output_outside_active_bundle_without_mutation() {
+        let bundle = project_bundle("motion-outside");
+        let core = AppCore::new();
+        core.open_project(&bundle).unwrap();
+        let outside = std::env::temp_dir().join(format!(
+            "opentake-motion-outside-{}-{}.mp4",
+            std::process::id(),
+            core.runtime_snapshot().project_epoch
+        ));
+        std::fs::write(&outside, b"outside").unwrap();
+        let before = core.runtime_snapshot();
+
+        let error = core
+            .commit_motion_media_for_project(
+                before.project_epoch,
+                before.version,
+                &bundle,
+                &outside,
+                "Outside",
+                &ProbedMedia::default(),
+                GenerationInput::default(),
+                MotionPlacement::Add {
+                    start_frame: 0,
+                    duration_frames: 1,
+                    track_index: Some(0),
+                },
+            )
+            .unwrap_err();
+        assert!(error.to_string().contains("active project media"));
+        let after = core.runtime_snapshot();
+        assert_eq!(after.timeline, before.timeline);
+        assert_eq!(after.media, before.media);
+        assert_eq!(after.version, before.version);
+
+        let _ = std::fs::remove_file(outside);
+        let _ = std::fs::remove_dir_all(bundle);
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn motion_media_commit_rejects_symlink_without_mutation() {
+        use std::os::unix::fs::symlink;
+
+        let bundle = project_bundle("motion-symlink");
+        let core = AppCore::new();
+        core.open_project(&bundle).unwrap();
+        let media_dir = opentake_project::layout::media_dir(&bundle);
+        std::fs::create_dir_all(&media_dir).unwrap();
+        let target = media_dir.join("motion-target.mp4");
+        let linked = media_dir.join("motion-linked.mp4");
+        std::fs::write(&target, b"validated-render-fixture").unwrap();
+        symlink(&target, &linked).unwrap();
+        let before = core.runtime_snapshot();
+
+        let error = core
+            .commit_motion_media_for_project(
+                before.project_epoch,
+                before.version,
+                &bundle,
+                &linked,
+                "Linked",
+                &ProbedMedia::default(),
+                GenerationInput::default(),
+                MotionPlacement::Add {
+                    start_frame: 0,
+                    duration_frames: 1,
+                    track_index: Some(0),
+                },
+            )
+            .unwrap_err();
+        assert!(error.to_string().contains("regular non-symlink"));
+        let after = core.runtime_snapshot();
+        assert_eq!(after.timeline, before.timeline);
+        assert_eq!(after.media, before.media);
+        assert_eq!(after.version, before.version);
+
+        let _ = std::fs::remove_dir_all(bundle);
+    }
+
     #[test]
     fn project_identity_workflow_blocks_project_replacement_until_release() {
         let core = AppCore::new();
@@ -2021,6 +2529,7 @@ mod tests {
             height: Some(480),
             fps: Some(24.0),
             has_audio: false,
+            color: None,
         };
         let entry = core.import_media_file("/abs/a.mp4", "a", &probe).unwrap();
 
@@ -2038,6 +2547,58 @@ mod tests {
         );
     }
 
+    #[test]
+    fn hdr_and_proxy_metadata_persist_across_project_reopen() {
+        let temp = tempfile::tempdir().unwrap();
+        let bundle = temp.path().join("ColorProxy.opentake");
+        let source = temp.path().join("source.mp4");
+        std::fs::write(&source, b"source").unwrap();
+        let core = AppCore::new();
+        core.save_project(Some(bundle.clone())).unwrap();
+        let entry = core
+            .import_media_file(
+                &source,
+                "source",
+                &ProbedMedia {
+                    duration_secs: 1.0,
+                    width: Some(1920),
+                    height: Some(1080),
+                    fps: Some(24.0),
+                    has_audio: false,
+                    color: Some(MediaColorMetadata {
+                        primaries: Some("bt2020".into()),
+                        transfer: Some("smpte2084".into()),
+                        matrix: Some("bt2020nc".into()),
+                        range: Some("tv".into()),
+                    }),
+                },
+            )
+            .unwrap();
+        core.save_project(None).unwrap();
+        let proxy_relative = "media/proxies/source.mp4";
+        std::fs::create_dir_all(bundle.join("media/proxies")).unwrap();
+        std::fs::write(bundle.join(proxy_relative), b"proxy").unwrap();
+        let revision = core.runtime_snapshot();
+        core.set_media_proxy_for_project(
+            revision.project_epoch,
+            &bundle,
+            &entry.id,
+            Some(MediaProxy {
+                relative_path: proxy_relative.into(),
+                source_sha256: "a".repeat(64),
+                width: 640,
+                height: 360,
+            }),
+        )
+        .unwrap();
+
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        let restored = reopened.media().entries.into_iter().next().unwrap();
+        assert!(restored.color.as_ref().is_some_and(|color| color.is_hdr()));
+        assert_eq!(restored.proxy.unwrap().relative_path, proxy_relative);
+    }
+
     #[test]
     fn import_media_unsupported_errors_and_emits_nothing() {
         let core = AppCore::new();
diff --git a/crates/opentake-core/src/dto.rs b/crates/opentake-core/src/dto.rs
index 8bb1b6a2..eadc0854 100644
--- a/crates/opentake-core/src/dto.rs
+++ b/crates/opentake-core/src/dto.rs
@@ -35,9 +35,23 @@ pub struct CmdError {
 
 impl From<CoreError> for CmdError {
     fn from(err: CoreError) -> Self {
+        let code = err.code();
+        let message = match &err {
+            CoreError::Edit(_)
+            | CoreError::Media(_)
+            | CoreError::Project(opentake_project::ProjectError::CompatibilityReadOnly {
+                ..
+            })
+            | CoreError::NoProjectOpen
+            | CoreError::Unsupported(_) => err.to_string(),
+            CoreError::Project(_) => {
+                eprintln!("project command failed: {err}");
+                "Project operation failed".to_string()
+            }
+        };
         CmdError {
-            code: err.code().to_string(),
-            message: err.to_string(),
+            code: code.to_string(),
+            message,
         }
     }
 }
@@ -239,9 +253,42 @@ mod tests {
     #[test]
     fn edit_apply_handler_maps_validation_error() {
         let core = core_with_track();
+        let before = core.get_timeline();
+        let events = std::sync::Arc::new(std::sync::atomic::AtomicUsize::new(0));
+        let observed = events.clone();
+        core.subscribe(move |_| {
+            observed.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
+        });
+
         let err = handle_edit_apply(&core, EditCommand::AddClips { entries: vec![] }).unwrap_err();
+
         assert_eq!(err.code, "validation");
         assert!(!err.message.is_empty());
+        let after = core.get_timeline();
+        assert_eq!(
+            after.timeline, before.timeline,
+            "failed edit mutated timeline"
+        );
+        assert_eq!(after.version, before.version, "failed edit mutated version");
+        assert_eq!(
+            after.project_epoch, before.project_epoch,
+            "failed edit mutated project identity"
+        );
+        assert_eq!(events.load(std::sync::atomic::Ordering::SeqCst), 0);
+    }
+
+    #[test]
+    fn internal_command_error_does_not_expose_project_paths() {
+        let error = CmdError::from(CoreError::Project(
+            opentake_project::ProjectError::MissingTimeline {
+                file: "project.json",
+                bundle: "/private/customer/secret.opentake".into(),
+            },
+        ));
+
+        assert_eq!(error.code, "internal");
+        assert_eq!(error.message, "Project operation failed");
+        assert!(!error.message.contains("/private"));
     }
 
     #[test]
diff --git a/crates/opentake-core/src/events.rs b/crates/opentake-core/src/events.rs
index f7c0a42e..fa318957 100644
--- a/crates/opentake-core/src/events.rs
+++ b/crates/opentake-core/src/events.rs
@@ -225,15 +225,41 @@ mod tests {
 
     #[test]
     fn core_event_serializes_with_kind_tag() {
-        let json = serde_json::to_string(&CoreEvent::TimelineChanged {
-            project_epoch: 3,
-            version: 7,
-        })
-        .unwrap();
-        assert_eq!(
-            json,
-            r#"{"kind":"timeline_changed","projectEpoch":3,"version":7}"#
-        );
+        let cases = [
+            (
+                CoreEvent::TimelineChanged {
+                    project_epoch: 3,
+                    version: 7,
+                },
+                r#"{"kind":"timeline_changed","projectEpoch":3,"version":7}"#,
+            ),
+            (
+                CoreEvent::ProjectOpened {
+                    path: "/project.otk".into(),
+                    project_epoch: 4,
+                    version: 0,
+                },
+                r#"{"kind":"project_opened","path":"/project.otk","projectEpoch":4,"version":0}"#,
+            ),
+            (
+                CoreEvent::ProjectSaved {
+                    path: "/project.otk".into(),
+                    project_epoch: 4,
+                },
+                r#"{"kind":"project_saved","path":"/project.otk","projectEpoch":4}"#,
+            ),
+            (
+                CoreEvent::MediaChanged {
+                    project_epoch: 4,
+                    count: 2,
+                },
+                r#"{"kind":"media_changed","projectEpoch":4,"count":2}"#,
+            ),
+        ];
+
+        for (event, expected) in cases {
+            assert_eq!(serde_json::to_string(&event).unwrap(), expected);
+        }
     }
 
     #[test]
diff --git a/crates/opentake-core/src/lib.rs b/crates/opentake-core/src/lib.rs
index 070c06eb..641854da 100644
--- a/crates/opentake-core/src/lib.rs
+++ b/crates/opentake-core/src/lib.rs
@@ -45,13 +45,14 @@ pub mod session;
 // --- Assembly façade ---
 pub use crate::core::{
     AppCore, BundleExportSnapshot, CapabilityImportCommit, CommittedMediaImport,
-    DeferredCoreEvents, ImportCommitWarning, PreparedMediaFolderRef, PreparedMediaImportOp,
-    ProjectRevision, ProjectRuntimeSnapshot, TimelineSnapshot,
+    DeferredCoreEvents, ImportCommitWarning, MotionMediaCommit, MotionPlacement,
+    PreparedMediaFolderRef, PreparedMediaImportOp, ProjectRevision, ProjectRuntimeSnapshot,
+    TimelineSnapshot,
 };
 pub use session::{
-    importable_clip_type, EditorSession, GenerationJobCommit, GenerationStateUpdate,
-    PreparedGenerationJob, PreparedGenerationOutput, ProbedMedia, SUPPORTED_AUDIO_EXTENSIONS,
-    SUPPORTED_IMAGE_EXTENSIONS, SUPPORTED_VIDEO_EXTENSIONS,
+    importable_clip_type, DerivedStemProvenance, EditorSession, GenerationJobCommit,
+    GenerationStateUpdate, PreparedGenerationJob, PreparedGenerationOutput, ProbedMedia,
+    SUPPORTED_AUDIO_EXTENSIONS, SUPPORTED_IMAGE_EXTENSIONS, SUPPORTED_VIDEO_EXTENSIONS,
 };
 
 // --- Events ---
diff --git a/crates/opentake-core/src/session.rs b/crates/opentake-core/src/session.rs
index ced3d523..1aa4a535 100644
--- a/crates/opentake-core/src/session.rs
+++ b/crates/opentake-core/src/session.rs
@@ -35,8 +35,8 @@
 use std::path::{Path, PathBuf};
 
 use opentake_domain::{
-    ClipType, GenerationInput, GenerationJobStatus, MediaAsset, MediaManifest, MediaManifestEntry,
-    MediaSource, Timeline,
+    ClipType, GenerationInput, GenerationJobStatus, MediaAsset, MediaColorMetadata, MediaManifest,
+    MediaManifestEntry, MediaProxy, MediaSource, Timeline,
 };
 use opentake_ops::command::{self, EditCommand, EditResult};
 use opentake_ops::{EditorState, IdGen};
@@ -68,6 +68,20 @@ pub struct ProbedMedia {
     pub fps: Option<f64>,
     /// Whether the file carries an audio track.
     pub has_audio: bool,
+    /// Source color signalling for HDR-aware decode and durable project state.
+    pub color: Option<MediaColorMetadata>,
+}
+
+/// Non-secret provenance attached when a separated audio stem re-enters the
+/// ordinary media manifest. Content/model hashes make the derivation auditable
+/// without persisting provider credentials or result URLs.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct DerivedStemProvenance {
+    pub source_asset_id: String,
+    pub source_sha256: String,
+    pub execution: String,
+    pub model_sha256: Option<String>,
+    pub stem: String,
 }
 
 /// Validated provider-neutral generation job prepared by the Agent/Tauri host.
@@ -167,6 +181,10 @@ fn safe_provider_prefix(value: &str) -> bool {
             .all(|byte| byte.is_ascii_lowercase() || byte.is_ascii_digit() || byte == b'-')
 }
 
+fn valid_sha256(value: &str) -> bool {
+    value.len() == 64 && value.bytes().all(|byte| byte.is_ascii_hexdigit())
+}
+
 fn safe_generation_error_code(value: &str) -> bool {
     !value.is_empty()
         && value.len() <= 80
@@ -477,6 +495,98 @@ impl EditorSession {
         self.import_media_file_checked(path, id, name, probe, || Ok(()))
     }
 
+    /// Import a ready vocals/accompaniment file through the shared media path
+    /// and attach durable provenance. The original asset remains immutable.
+    pub fn import_derived_stem_file(
+        &mut self,
+        path: impl AsRef<Path>,
+        id: impl Into<String>,
+        name: impl Into<String>,
+        probe: &ProbedMedia,
+        provenance: DerivedStemProvenance,
+    ) -> Result<MediaManifestEntry> {
+        self.ensure_mutable()?;
+        let source = self
+            .state
+            .manifest
+            .entries
+            .iter()
+            .find(|entry| entry.id == provenance.source_asset_id)
+            .ok_or_else(|| {
+                CoreError::Media(format!(
+                    "stem source asset does not exist: {}",
+                    provenance.source_asset_id
+                ))
+            })?;
+        if !matches!(source.kind, ClipType::Audio | ClipType::Video)
+            || !source.has_audio.unwrap_or(source.kind == ClipType::Audio)
+        {
+            return Err(CoreError::Media(
+                "stem source asset has no audio".to_string(),
+            ));
+        }
+        if !valid_sha256(&provenance.source_sha256)
+            || provenance
+                .model_sha256
+                .as_deref()
+                .is_some_and(|digest| !valid_sha256(digest))
+        {
+            return Err(CoreError::Media(
+                "stem provenance checksum is invalid".to_string(),
+            ));
+        }
+        let (provider, model) = provenance.execution.split_once(':').ok_or_else(|| {
+            CoreError::Media("stem execution must be '<provider>:<model>'".to_string())
+        })?;
+        if !safe_provider_prefix(provider) || model.trim().is_empty() {
+            return Err(CoreError::Media(
+                "stem execution provider or model is invalid".to_string(),
+            ));
+        }
+        let output_index = match provenance.stem.as_str() {
+            "vocals" => 0,
+            "accompaniment" => 1,
+            _ => {
+                return Err(CoreError::Media(
+                    "stem kind must be vocals or accompaniment".to_string(),
+                ))
+            }
+        };
+
+        let before = self.state.manifest.clone();
+        let result = (|| {
+            let entry = self.import_media_file(path, id, name, probe)?;
+            let target = self
+                .state
+                .manifest
+                .entries
+                .iter_mut()
+                .find(|candidate| candidate.id == entry.id)
+                .ok_or_else(|| CoreError::Media("imported stem disappeared".to_string()))?;
+            target.generation_input = Some(GenerationInput {
+                prompt: format!("stem:{}", provenance.stem),
+                model: model.to_string(),
+                duration: probe.duration_secs.max(0.0).round() as i32,
+                aspect_ratio: "audio".to_string(),
+                quality: provenance
+                    .model_sha256
+                    .map(|digest| format!("model-sha256:{digest}")),
+                reference_audio_urls: Some(vec![format!("sha256:{}", provenance.source_sha256)]),
+                provider: Some(provider.to_string()),
+                status: Some(GenerationJobStatus::Ready),
+                progress: Some(1.0),
+                output_index: Some(output_index),
+                source_asset_id: Some(provenance.source_asset_id),
+                ..GenerationInput::default()
+            });
+            Ok(target.clone())
+        })();
+        if result.is_err() {
+            self.state.manifest = before;
+        }
+        result
+    }
+
     /// Import one file and roll the manifest back if `postcondition` fails.
     /// Save-as-media uses this to bind its final retained-file identity check to
     /// the live manifest mutation: an attacker-triggered swap can never leave a
@@ -498,6 +608,7 @@ impl EditorSession {
         asset.source_width = probe.width;
         asset.source_height = probe.height;
         asset.source_fps = probe.fps;
+        asset.color = probe.color.clone();
         // Video defaults to having audio (MediaAsset::new); refine from the probe.
         // Non-video never carries a video-track-linked audio flag upstream.
         asset.has_audio = match kind {
@@ -572,6 +683,8 @@ impl EditorSession {
         entry.source_width = probe.width;
         entry.source_height = probe.height;
         entry.source_fps = probe.fps;
+        entry.color = probe.color.clone();
+        entry.proxy = None;
         entry.has_audio = Some(match kind {
             ClipType::Audio => true,
             ClipType::Video => probe.has_audio,
@@ -590,6 +703,47 @@ impl EditorSession {
         Ok(self.state.manifest.set_favorites(asset_ids, favorite))
     }
 
+    /// Attach or clear a project-local playback proxy without changing the
+    /// authoritative source used by export. The proxy path is deliberately
+    /// constrained to `media/proxies/` and the source digest is fixed-width so
+    /// corrupt or externally-authored manifests cannot redirect playback.
+    pub fn set_media_proxy(
+        &mut self,
+        asset_id: &str,
+        proxy: Option<MediaProxy>,
+    ) -> Result<MediaManifestEntry> {
+        self.ensure_mutable()?;
+        if let Some(proxy) = proxy.as_ref() {
+            let path = Path::new(&proxy.relative_path);
+            let components: Vec<_> = path.components().collect();
+            if path.is_absolute()
+                || components.len() != 3
+                || components[0] != std::path::Component::Normal("media".as_ref())
+                || components[1] != std::path::Component::Normal("proxies".as_ref())
+                || !matches!(components[2], std::path::Component::Normal(_))
+                || path.extension().and_then(|extension| extension.to_str()) != Some("mp4")
+                || proxy.width == 0
+                || proxy.height == 0
+                || proxy.source_sha256.len() != 64
+                || !proxy
+                    .source_sha256
+                    .bytes()
+                    .all(|byte| byte.is_ascii_hexdigit())
+            {
+                return Err(CoreError::Media("invalid media proxy metadata".to_string()));
+            }
+        }
+        let entry = self
+            .state
+            .manifest
+            .entries
+            .iter_mut()
+            .find(|entry| entry.id == asset_id)
+            .ok_or_else(|| CoreError::Media(format!("unknown media asset: {asset_id}")))?;
+        entry.proxy = proxy;
+        Ok(entry.clone())
+    }
+
     /// Set or clear one asset's content-addressed global favorite id. This is a
     /// manifest mutation outside undo, matching [`Self::set_media_favorite`].
     pub fn set_media_global_favorite(
@@ -778,6 +932,8 @@ impl EditorSession {
                     plan.kind == ClipType::Audio
                         || (plan.kind == ClipType::Video && input.generate_audio.unwrap_or(true)),
                 ),
+                color: None,
+                proxy: None,
                 folder_id: plan.folder_id.clone(),
                 cached_remote_url: None,
                 cached_remote_url_expires_at: None,
@@ -894,6 +1050,8 @@ impl EditorSession {
         entry.source_height = output.probe.height;
         entry.source_fps = output.probe.fps;
         entry.has_audio = Some(output.probe.has_audio);
+        entry.color = output.probe.color.clone();
+        entry.proxy = None;
         input.status = Some(GenerationJobStatus::Ready);
         input.progress = Some(1.0);
         input.error_code = None;
@@ -1366,6 +1524,7 @@ mod tests {
             height: Some(1080),
             fps: Some(30.0),
             has_audio: true,
+            color: None,
         };
         let entry = s
             .import_media_file("/abs/clip.mp4", "asset-1", "clip", &probe)
@@ -1397,6 +1556,48 @@ mod tests {
         assert_eq!(s.version(), 0);
     }
 
+    #[test]
+    fn derived_stem_import_reuses_media_path_and_persists_provenance() {
+        let mut session = EditorSession::new_project();
+        let source_probe = ProbedMedia {
+            duration_secs: 5.0,
+            has_audio: true,
+            ..ProbedMedia::default()
+        };
+        session
+            .import_media_file("/abs/source.wav", "source-asset", "Source", &source_probe)
+            .unwrap();
+        let stem = session
+            .import_derived_stem_file(
+                "/abs/source-vocals.wav",
+                "stem-asset",
+                "Source Vocals",
+                &source_probe,
+                DerivedStemProvenance {
+                    source_asset_id: "source-asset".into(),
+                    source_sha256: "a".repeat(64),
+                    execution: "local:opentake-center-v1".into(),
+                    model_sha256: Some("b".repeat(64)),
+                    stem: "vocals".into(),
+                },
+            )
+            .unwrap();
+        let provenance = stem.generation_input.expect("derived provenance");
+        assert_eq!(provenance.prompt, "stem:vocals");
+        assert_eq!(provenance.provider.as_deref(), Some("local"));
+        assert_eq!(provenance.model, "opentake-center-v1");
+        assert_eq!(provenance.source_asset_id.as_deref(), Some("source-asset"));
+        assert_eq!(
+            provenance.reference_audio_urls,
+            Some(vec![format!("sha256:{}", "a".repeat(64))])
+        );
+        assert_eq!(
+            provenance.quality,
+            Some(format!("model-sha256:{}", "b".repeat(64)))
+        );
+        assert_eq!(provenance.status, Some(GenerationJobStatus::Ready));
+    }
+
     #[test]
     fn reimporting_the_same_file_reuses_the_entry_instead_of_duplicating() {
         // #91: importing a file already in the manifest must not append a second
@@ -1409,6 +1610,7 @@ mod tests {
             height: Some(480),
             fps: Some(24.0),
             has_audio: true,
+            color: None,
         };
         let first = s
             .import_media_file("/abs/clip.mp4", "asset-1", "clip", &probe)
@@ -1424,6 +1626,55 @@ mod tests {
         assert_eq!(second.source, first.source);
     }
 
+    #[test]
+    fn media_proxy_metadata_is_confined_and_never_replaces_source() {
+        let mut session = EditorSession::new_project();
+        let source = "/abs/source.mp4";
+        let entry = session
+            .import_media_file(source, "asset", "source", &ProbedMedia::default())
+            .unwrap();
+        let original_source = entry.source;
+        let proxy = MediaProxy {
+            relative_path: "media/proxies/asset.mp4".into(),
+            source_sha256: "a".repeat(64),
+            width: 640,
+            height: 360,
+        };
+        let updated = session
+            .set_media_proxy("asset", Some(proxy.clone()))
+            .unwrap();
+        assert_eq!(updated.source, original_source);
+        assert_eq!(updated.proxy, Some(proxy));
+
+        assert!(session
+            .set_media_proxy(
+                "asset",
+                Some(MediaProxy {
+                    relative_path: "../outside.mp4".into(),
+                    source_sha256: "a".repeat(64),
+                    width: 640,
+                    height: 360,
+                }),
+            )
+            .is_err());
+        assert!(session
+            .set_media_proxy(
+                "asset",
+                Some(MediaProxy {
+                    relative_path: "media/proxies/nested/asset.mp4".into(),
+                    source_sha256: "a".repeat(64),
+                    width: 640,
+                    height: 360,
+                }),
+            )
+            .is_err());
+        assert!(session
+            .set_media_proxy("asset", None)
+            .unwrap()
+            .proxy
+            .is_none());
+    }
+
     #[test]
     fn import_image_has_no_audio_regardless_of_probe() {
         let mut s = EditorSession::new_project();
@@ -1433,6 +1684,7 @@ mod tests {
             height: Some(600),
             fps: None,
             has_audio: true, // probe lies; an image never has audio
+            color: None,
         };
         let entry = s
             .import_media_file("/abs/pic.png", "img-1", "pic", &probe)
@@ -1534,6 +1786,8 @@ mod tests {
             source_height: Some(2),
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-core/tests/generation_persistence.rs b/crates/opentake-core/tests/generation_persistence.rs
index 94bf0eec..6db20e06 100644
--- a/crates/opentake-core/tests/generation_persistence.rs
+++ b/crates/opentake-core/tests/generation_persistence.rs
@@ -25,6 +25,8 @@ fn saved_project() -> (tempfile::TempDir, std::path::PathBuf) {
         source_height: Some(3),
         source_fps: None,
         has_audio: Some(false),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
@@ -140,6 +142,7 @@ fn placeholders_job_events_and_finalized_output_survive_restart() {
                 height: Some(6),
                 fps: None,
                 has_audio: false,
+                color: None,
             },
             created_at: Some(800_000_002.0),
         },
@@ -283,6 +286,7 @@ fn cancelling_a_partially_finalized_job_preserves_ready_outputs() {
                 height: Some(6),
                 fps: None,
                 has_audio: false,
+                color: None,
             },
             created_at: Some(800_000_002.0),
         },
diff --git a/crates/opentake-core/tests/project_open.rs b/crates/opentake-core/tests/project_open.rs
index 6d1903e5..449ca8c9 100644
--- a/crates/opentake-core/tests/project_open.rs
+++ b/crates/opentake-core/tests/project_open.rs
@@ -60,6 +60,8 @@ fn manifest_entry(id: &str, generation_input: Option<GenerationInput>) -> MediaM
         source_height: None,
         source_fps: None,
         has_audio: Some(true),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-core/tests/schema_compat.rs b/crates/opentake-core/tests/schema_compat.rs
index 07901630..694d97b0 100644
--- a/crates/opentake-core/tests/schema_compat.rs
+++ b/crates/opentake-core/tests/schema_compat.rs
@@ -47,6 +47,8 @@ fn external_entry(id: &str, name: &str, source: &Path) -> MediaManifestEntry {
         source_height: Some(240),
         source_fps: Some(30.0),
         has_audio: Some(false),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-domain/src/audio.rs b/crates/opentake-domain/src/audio.rs
new file mode 100644
index 00000000..91e98344
--- /dev/null
+++ b/crates/opentake-domain/src/audio.rs
@@ -0,0 +1,86 @@
+use serde::{Deserialize, Serialize};
+
+/// Deterministic local denoise profiles. Both use the same spectral processing
+/// owner; `Voice` applies stronger subtraction for spoken-word material.
+#[derive(Clone, Copy, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub enum DenoiseMode {
+    #[default]
+    Adaptive,
+    Voice,
+}
+
+/// Non-destructive denoise parameters persisted on one clip.
+#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct AudioDenoise {
+    pub mode: DenoiseMode,
+    pub strength: f64,
+    /// Inspector A/B toggle. Export always applies the configured operation;
+    /// native preview applies it only while this flag is true.
+    pub preview_enabled: bool,
+}
+
+impl AudioDenoise {
+    pub fn validate(&self) -> Result<(), &'static str> {
+        if !self.strength.is_finite() || !(0.0..=1.0).contains(&self.strength) {
+            return Err("denoise strength must be finite and between 0 and 1");
+        }
+        Ok(())
+    }
+}
+
+/// Persisted result of one clip loudness analysis. The measured values make the
+/// operation reproducible; playback/export consume only `gain_db` and never
+/// need to re-read the source.
+#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LoudnessNormalization {
+    pub target_lufs: f64,
+    pub true_peak_ceiling_dbtp: f64,
+    pub input_integrated_lufs: f64,
+    pub input_true_peak_dbtp: f64,
+    pub gain_db: f64,
+    pub output_integrated_lufs: f64,
+    pub output_true_peak_dbtp: f64,
+}
+
+impl LoudnessNormalization {
+    pub fn validate(&self) -> Result<(), &'static str> {
+        let values = [
+            self.target_lufs,
+            self.true_peak_ceiling_dbtp,
+            self.input_integrated_lufs,
+            self.input_true_peak_dbtp,
+            self.gain_db,
+            self.output_integrated_lufs,
+            self.output_true_peak_dbtp,
+        ];
+        if values.iter().any(|value| !value.is_finite()) {
+            return Err("loudness values must be finite");
+        }
+        if self.true_peak_ceiling_dbtp > 0.0 {
+            return Err("true-peak ceiling must be at most 0 dBTP");
+        }
+        if !(-70.0..=0.0).contains(&self.target_lufs)
+            || !(-20.0..=0.0).contains(&self.true_peak_ceiling_dbtp)
+            || !(-120.0..=60.0).contains(&self.gain_db)
+        {
+            return Err("loudness target, ceiling, or gain is outside the supported range");
+        }
+        if (self.output_integrated_lufs - self.target_lufs).abs() > 1.0 {
+            return Err("normalized loudness does not reach its target");
+        }
+        if self.output_true_peak_dbtp > self.true_peak_ceiling_dbtp + 0.05 {
+            return Err("normalized true peak exceeds its ceiling");
+        }
+        Ok(())
+    }
+
+    pub fn linear_gain(self) -> f64 {
+        if !self.gain_db.is_finite() {
+            return 1.0;
+        }
+        10.0_f64.powf(self.gain_db.clamp(-120.0, 60.0) / 20.0)
+    }
+}
diff --git a/crates/opentake-domain/src/clip.rs b/crates/opentake-domain/src/clip.rs
index d8570097..be8c495f 100644
--- a/crates/opentake-domain/src/clip.rs
+++ b/crates/opentake-domain/src/clip.rs
@@ -17,10 +17,26 @@ use crate::clip_wire::{
     deserialize_one_on_error, deserialize_optional_crop_track_on_error,
     deserialize_optional_f64_track_on_error, deserialize_optional_pair_track_on_error,
 };
-use crate::grade::{ChromaKey, ColorGrade, Effect, Mask};
+use crate::grade::{ChromaKey, ColorGrade, ColorMatchInput, Effect, Mask};
 use crate::keyframe::{AnimPair, AnimatableProperty, Interpolation, KeyframeTrack};
+use crate::lut::LutReference;
+use crate::stabilization::StabilizationTrack;
 use crate::text::TextStyle;
 use crate::transform::{Crop, Point, Transform};
+use crate::transition::Transition;
+
+/// Persisted provenance for one accepted caption translation. The original
+/// text remains available for review/recovery and manual text edits clear this
+/// record so the project never attributes authored text to a provider.
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct CaptionTranslationInput {
+    pub source_text: String,
+    pub source_locale: String,
+    pub target_locale: String,
+    pub provider: String,
+    pub model: String,
+}
 
 /// Linear amplitude <-> dB mapping for the volume slider. 1:1 port of
 /// upstream `VolumeScale`. Below the floor we snap to true 0 (hard mute).
@@ -147,6 +163,15 @@ pub struct Clip {
         skip_serializing_if = "Option::is_none"
     )]
     pub caption_group_id: Option<String>,
+    /// ID of an editable child timeline in the root timeline's
+    /// `nestedSequences` registry. Nested clips never overload `mediaRef` with
+    /// a sentinel value, so media and sequence identity remain unambiguous.
+    #[serde(
+        default,
+        deserialize_with = "deserialize_default_on_error",
+        skip_serializing_if = "Option::is_none"
+    )]
+    pub nested_sequence_id: Option<String>,
 
     // Text clips only.
     #[serde(
@@ -161,6 +186,8 @@ pub struct Clip {
         skip_serializing_if = "Option::is_none"
     )]
     pub text_style: Option<TextStyle>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub caption_translation_input: Option<CaptionTranslationInput>,
 
     // Keyframe tracks for each animatable property. None when no animation exists.
     #[serde(
@@ -200,12 +227,29 @@ pub struct Clip {
     )]
     pub volume_track: Option<KeyframeTrack<f64>>,
 
+    /// Source analysis plus the static gain used identically by preview and
+    /// export. `None` leaves authored volume behavior unchanged.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub loudness_normalization: Option<crate::LoudnessNormalization>,
+
+    /// Local non-destructive denoise configuration. Source PCM is never
+    /// rewritten; native preview and export process decoded copies.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub audio_denoise: Option<crate::AudioDenoise>,
+
     // Advanced pixel-effect fields (A-tier; `docs/ADVANCED-FEATURES.md`). All
     // `#[serde(default)]` + Option/Vec, so older projects (without these keys)
     // decode unchanged, and an all-default clip omits them on the way out.
     /// High-end floating-point color grade (linear-light chain). `None` = no grade.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub color_grade: Option<ColorGrade>,
+    /// Sampling inputs and measured result for an automatically matched grade.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub color_match_input: Option<ColorMatchInput>,
+    /// Project-managed 3D LUT reference. The persisted id maps only to the
+    /// bundle's canonical `media/luts/<sha256>.cube` location.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub lut: Option<LutReference>,
     /// Green/blue-screen chroma key. `None` = no keying.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub chroma_key: Option<ChromaKey>,
@@ -215,6 +259,17 @@ pub struct Clip {
     /// Generic named-effect chain. Empty = no effects.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub effects: Vec<Effect>,
+    /// Non-destructive camera compensation composed with authored transform tracks.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub stabilization: Option<StabilizationTrack>,
+    /// Optional visual transition into one exact adjacent successor. Pair
+    /// identity prevents stale transitions from rebinding after moves/deletes.
+    #[serde(
+        default,
+        deserialize_with = "deserialize_default_on_error",
+        skip_serializing_if = "Option::is_none"
+    )]
+    pub transition_out: Option<Transition>,
     /// Reverse playback. When true, video clips sample their referenced source
     /// window in reverse order. Non-video sources ignore this flag.
     #[serde(default, skip_serializing_if = "is_false")]
@@ -245,18 +300,25 @@ impl Clip {
         "crop",
         "linkGroupId",
         "captionGroupId",
+        "nestedSequenceId",
         "textContent",
         "textStyle",
+        "captionTranslationInput",
         "opacityTrack",
         "positionTrack",
         "scaleTrack",
         "rotationTrack",
         "cropTrack",
         "volumeTrack",
+        "loudnessNormalization",
+        "audioDenoise",
         "colorGrade",
+        "lut",
         "chromaKey",
         "masks",
         "effects",
+        "stabilization",
+        "transitionOut",
         "reversed",
     ];
     pub const TOLERANT_SCALAR_WIRE_FIELDS: &'static [&'static str] = &[
@@ -334,22 +396,42 @@ impl Clip {
             crop: Crop::default(),
             link_group_id: None,
             caption_group_id: None,
+            nested_sequence_id: None,
             text_content: None,
             text_style: None,
+            caption_translation_input: None,
             opacity_track: None,
             position_track: None,
             scale_track: None,
             rotation_track: None,
             crop_track: None,
             volume_track: None,
+            loudness_normalization: None,
+            audio_denoise: None,
             color_grade: None,
+            color_match_input: None,
+            lut: None,
             chroma_key: None,
             masks: Vec::new(),
             effects: Vec::new(),
+            stabilization: None,
+            transition_out: None,
             reversed: false,
         }
     }
 
+    /// Construct a clip that references one editable nested sequence.
+    pub fn new_nested(
+        id: impl Into<String>,
+        sequence_id: impl Into<String>,
+        start_frame: i32,
+        duration_frames: i32,
+    ) -> Self {
+        let mut clip = Self::new(id, "", start_frame, duration_frames);
+        clip.nested_sequence_id = Some(sequence_id.into());
+        clip
+    }
+
     /// Frame where this clip ends on the timeline (exclusive end).
     pub fn end_frame(&self) -> i32 {
         self.start_frame + self.duration_frames
@@ -486,7 +568,7 @@ impl Clip {
             }
             _ => 1.0,
         };
-        self.volume * kf_gain * self.fade_multiplier(frame)
+        self.volume * kf_gain * self.loudness_gain() * self.fade_multiplier(frame)
     }
 
     /// Linear volume without the fade envelope.
@@ -497,7 +579,13 @@ impl Clip {
             }
             _ => 1.0,
         };
-        self.volume * kf_gain
+        self.volume * kf_gain * self.loudness_gain()
+    }
+
+    pub fn loudness_gain(&self) -> f64 {
+        self.loudness_normalization
+            .map(crate::LoudnessNormalization::linear_gain)
+            .unwrap_or(1.0)
     }
 
     /// 0..=1 envelope from the fade head/tail ramps. `min(in, out)`. Returns 0
@@ -903,6 +991,27 @@ mod tests {
         approx(c.raw_volume_at(105), 1.0);
     }
 
+    #[test]
+    fn persisted_loudness_gain_is_shared_by_raw_and_effective_volume() {
+        let mut c = base_clip();
+        c.volume = 0.5;
+        c.loudness_normalization = Some(crate::LoudnessNormalization {
+            target_lufs: -16.0,
+            true_peak_ceiling_dbtp: -1.0,
+            input_integrated_lufs: -22.0,
+            input_true_peak_dbtp: -8.0,
+            gain_db: 6.0,
+            output_integrated_lufs: -16.0,
+            output_true_peak_dbtp: -2.0,
+        });
+        let expected = 0.5 * 10.0_f64.powf(6.0 / 20.0);
+        approx(c.raw_volume_at(110), expected);
+        approx(c.volume_at(110), expected);
+        let json = serde_json::to_string(&c).unwrap();
+        let roundtrip: Clip = serde_json::from_str(&json).unwrap();
+        assert_eq!(roundtrip.loudness_normalization, c.loudness_normalization);
+    }
+
     #[test]
     fn live_volume_kf_db_requires_active_track_and_membership() {
         let mut c = base_clip();
@@ -1149,6 +1258,42 @@ mod tests {
         assert_eq!(c, back);
     }
 
+    #[test]
+    fn clip_transition_roundtrips_and_legacy_projects_default_to_none() {
+        let mut c = base_clip();
+        c.transition_out = Some(crate::transition::Transition {
+            from_clip_id: "c1".into(),
+            to_clip_id: "c2".into(),
+            kind: crate::transition::TransitionKind::CrossDissolve,
+            duration_frames: 12,
+        });
+        let json = serde_json::to_string(&c).unwrap();
+        assert!(json.contains(
+            r#""transitionOut":{"fromClipId":"c1","toClipId":"c2","kind":"crossDissolve","durationFrames":12}"#
+        ));
+        let back: Clip = serde_json::from_str(&json).unwrap();
+        assert_eq!(c, back);
+
+        let legacy: Clip = serde_json::from_str(
+            r#"{"id":"old","mediaRef":"m","startFrame":0,"durationFrames":12}"#,
+        )
+        .unwrap();
+        assert!(legacy.transition_out.is_none());
+
+        let legacy_transition: Clip = serde_json::from_str(
+            r#"{"id":"c1","mediaRef":"m","startFrame":0,"durationFrames":12,"transitionOut":{"toClipId":"c2","kind":"crossDissolve","durationFrames":4}}"#,
+        )
+        .unwrap();
+        assert_eq!(
+            legacy_transition
+                .transition_out
+                .as_ref()
+                .unwrap()
+                .from_clip_id,
+            ""
+        );
+    }
+
     #[test]
     fn clip_decodes_with_missing_optional_fields() {
         // Only the required keys present; everything else falls back to defaults.
@@ -1221,8 +1366,9 @@ mod tests {
             },
             feather: 0.05,
             invert: false,
+            ..Mask::default()
         }];
-        c.effects = vec![Effect::new("gaussianBlur").with_param("radius", 4.0)];
+        c.effects = vec![Effect::new("grayscale").with_param("amount", 0.4)];
         let json = serde_json::to_string(&c).unwrap();
         assert!(json.contains("\"colorGrade\""));
         assert!(json.contains("\"chromaKey\""));
diff --git a/crates/opentake-domain/src/grade.rs b/crates/opentake-domain/src/grade.rs
index bac2593b..408c0658 100644
--- a/crates/opentake-domain/src/grade.rs
+++ b/crates/opentake-domain/src/grade.rs
@@ -22,6 +22,11 @@
 
 use serde::{Deserialize, Serialize};
 
+/// Fixed GPU contract shared by editor validation and the compositor uniform.
+pub const MAX_MASKS_PER_CLIP: usize = 4;
+/// Maximum authored vertices in one pen/polygon mask.
+pub const MAX_POLYGON_MASK_POINTS: usize = 16;
+
 // ===========================================================================
 // Small numeric helpers (shared by the reference pixel math).
 // ===========================================================================
@@ -134,23 +139,132 @@ impl LiftGammaGain {
         self.lift.is_zero() && self.gamma.is_one() && self.gain.is_one()
     }
 
-    /// Apply one channel: `gain * (x + lift)` then `^(1/gamma)`. Matches the
-    /// classic lift/gamma/gain operator (gamma applied last, as a display power).
+    /// Apply one channel: `gain * (x + lift * (1 - x))^(1/gamma)`.
+    /// Lift rolls off toward highlights, gamma shapes mid-tones, and gain remains
+    /// an independent highlight multiplier.
     #[inline]
     fn apply_channel(x: f64, lift: f64, gamma: f64, gain: f64) -> f64 {
-        let v = gain * (x + lift);
+        let shaped = x + lift * (1.0 - x);
         if gamma > 0.0 && (gamma - 1.0).abs() > f64::EPSILON {
-            // `v` can be negative after lift; guard the power.
-            v.max(0.0).powf(1.0 / gamma)
+            // `shaped` can be negative after lift; guard fractional powers.
+            gain * shaped.max(0.0).powf(1.0 / gamma)
         } else {
-            v
+            gain * shaped
+        }
+    }
+}
+
+/// One feathered HSL qualifier applied after the primary color controls.
+/// Hue values are normalized turns, so the range wraps continuously across
+/// red (`0 == 1`) without a seam.
+#[derive(Clone, Copy, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct HslSecondary {
+    /// Center of the selected hue range in normalized turns (`0..=1`).
+    pub hue_center: f64,
+    /// Full width of the selected hue range (`0 < width <= 1`).
+    pub hue_width: f64,
+    /// Soft edge width measured inward from both range boundaries (`0..=0.5`).
+    pub feather: f64,
+    /// Hue rotation in normalized turns (`-0.5..=0.5`).
+    pub hue_shift: f64,
+    /// Relative saturation adjustment (`-1..=1`).
+    pub saturation: f64,
+    /// Additive lightness adjustment (`-1..=1`).
+    pub lightness: f64,
+}
+
+impl Default for HslSecondary {
+    fn default() -> Self {
+        Self {
+            hue_center: 0.0,
+            hue_width: 0.24,
+            feather: 0.08,
+            hue_shift: 0.0,
+            saturation: 0.0,
+            lightness: 0.0,
+        }
+    }
+}
+
+impl HslSecondary {
+    fn is_identity(&self) -> bool {
+        self.hue_shift == 0.0 && self.saturation == 0.0 && self.lightness == 0.0
+    }
+
+    fn weight(&self, hue: f64, saturation: f64) -> f64 {
+        // Achromatic pixels have no stable hue and must not be selected.
+        if saturation <= f64::EPSILON {
+            return 0.0;
+        }
+        let distance = ((hue - self.hue_center + 0.5).rem_euclid(1.0) - 0.5).abs();
+        let outer = self.hue_width * 0.5;
+        if distance > outer {
+            return 0.0;
+        }
+        if self.feather <= f64::EPSILON {
+            return 1.0;
+        }
+        let inner = (outer - self.feather).max(0.0);
+        1.0 - smoothstep01(inner, outer, distance)
+    }
+
+    fn apply(&self, r: f64, g: f64, b: f64) -> (f64, f64, f64) {
+        let (mut hue, mut saturation, mut lightness) = rgb_to_hsl(r, g, b);
+        let weight = self.weight(hue, saturation);
+        if weight <= f64::EPSILON {
+            return (r, g, b);
         }
+        hue = (hue + self.hue_shift * weight).rem_euclid(1.0);
+        saturation = clamp01(saturation * (1.0 + self.saturation * weight));
+        lightness = clamp01(lightness + self.lightness * weight);
+        hsl_to_rgb(hue, saturation, lightness)
     }
 }
 
+fn rgb_to_hsl(r: f64, g: f64, b: f64) -> (f64, f64, f64) {
+    let max = r.max(g).max(b);
+    let min = r.min(g).min(b);
+    let delta = max - min;
+    let lightness = (max + min) * 0.5;
+    if delta <= f64::EPSILON {
+        return (0.0, 0.0, lightness);
+    }
+    let saturation = delta / (1.0 - (2.0 * lightness - 1.0).abs()).max(f64::EPSILON);
+    let sector = if max == r {
+        ((g - b) / delta).rem_euclid(6.0)
+    } else if max == g {
+        (b - r) / delta + 2.0
+    } else {
+        (r - g) / delta + 4.0
+    };
+    (sector / 6.0, saturation, lightness)
+}
+
+fn hsl_to_rgb(hue: f64, saturation: f64, lightness: f64) -> (f64, f64, f64) {
+    let chroma = (1.0 - (2.0 * lightness - 1.0).abs()) * saturation;
+    let sector = hue.rem_euclid(1.0) * 6.0;
+    let x = chroma * (1.0 - (sector.rem_euclid(2.0) - 1.0).abs());
+    let (r1, g1, b1) = if sector < 1.0 {
+        (chroma, x, 0.0)
+    } else if sector < 2.0 {
+        (x, chroma, 0.0)
+    } else if sector < 3.0 {
+        (0.0, chroma, x)
+    } else if sector < 4.0 {
+        (0.0, x, chroma)
+    } else if sector < 5.0 {
+        (x, 0.0, chroma)
+    } else {
+        (chroma, 0.0, x)
+    };
+    let m = lightness - chroma * 0.5;
+    (r1 + m, g1 + m, b1 + m)
+}
+
 /// High-end floating-point color grade, applied in **linear light** in the order
 /// locked by the spec:
-/// `exposure -> white balance -> lift/gamma/gain -> contrast -> saturation`.
+/// `exposure -> white balance -> lift/gamma/gain -> contrast -> saturation -> HSL secondary`.
 ///
 /// Every field defaults to a no-op, so `ColorGrade::default()` is the identity
 /// transform (verified by [`ColorGrade::is_identity`] and a unit test).
@@ -176,8 +290,48 @@ pub struct ColorGrade {
     /// Saturation multiplier (identity `1`; `0` = greyscale, `>1` = boosted).
     #[serde(default = "default_one")]
     pub saturation: f64,
+    /// Optional feathered hue qualifier. Absence preserves legacy projects and
+    /// avoids uploading an active secondary block for identity grades.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub hsl_secondary: Option<HslSecondary>,
 }
 
+/// Persisted provenance for an automatically generated reference color match.
+/// The grade remains fully editable; a later manual grade change clears this
+/// record so projects never claim an edited grade is still the sampled match.
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ColorMatchInput {
+    pub reference_media_ref: String,
+    pub reference_frame: i32,
+    pub target_frame: i32,
+    pub algorithm: String,
+    pub algorithm_version: u32,
+    pub target_mean_linear: Rgb,
+    pub reference_mean_linear: Rgb,
+    pub delta_e_before: f64,
+    pub delta_e_after: f64,
+    pub target_luma_before: f64,
+    pub target_luma_after: f64,
+}
+
+/// Stable validation failure for authored color-grade parameters. The bounds
+/// mirror the Inspector controls and keep malformed persisted data out of the
+/// command and GPU paths.
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub struct ColorGradeValidationError {
+    pub field: &'static str,
+    pub rule: &'static str,
+}
+
+impl std::fmt::Display for ColorGradeValidationError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{} must be {}", self.field, self.rule)
+    }
+}
+
+impl std::error::Error for ColorGradeValidationError {}
+
 impl Default for ColorGrade {
     fn default() -> Self {
         ColorGrade {
@@ -187,6 +341,7 @@ impl Default for ColorGrade {
             lift_gamma_gain: LiftGammaGain::default(),
             contrast: 0.0,
             saturation: 1.0,
+            hsl_secondary: None,
         }
     }
 }
@@ -204,6 +359,120 @@ impl ColorGrade {
             && self.lift_gamma_gain.is_identity()
             && self.contrast == 0.0
             && self.saturation == 1.0
+            && self
+                .hsl_secondary
+                .is_none_or(|secondary| secondary.is_identity())
+    }
+
+    /// Validate the persisted grade against the finite parameter ranges exposed
+    /// by the editor. Gamma is strictly positive because it is used as a power
+    /// denominator in both the CPU reference and WGSL shader.
+    pub fn validate(&self) -> Result<(), ColorGradeValidationError> {
+        fn inclusive(
+            field: &'static str,
+            value: f64,
+            range: std::ops::RangeInclusive<f64>,
+            rule: &'static str,
+        ) -> Result<(), ColorGradeValidationError> {
+            if !value.is_finite() || !range.contains(&value) {
+                return Err(ColorGradeValidationError { field, rule });
+            }
+            Ok(())
+        }
+
+        inclusive(
+            "exposure",
+            self.exposure,
+            -5.0..=5.0,
+            "finite and within [-5, 5]",
+        )?;
+        inclusive(
+            "temperature",
+            self.temperature,
+            -1.0..=1.0,
+            "finite and within [-1, 1]",
+        )?;
+        inclusive("tint", self.tint, -1.0..=1.0, "finite and within [-1, 1]")?;
+        for (field, value) in [
+            ("liftGammaGain.lift.r", self.lift_gamma_gain.lift.r),
+            ("liftGammaGain.lift.g", self.lift_gamma_gain.lift.g),
+            ("liftGammaGain.lift.b", self.lift_gamma_gain.lift.b),
+        ] {
+            inclusive(field, value, -1.0..=1.0, "finite and within [-1, 1]")?;
+        }
+        for (field, value) in [
+            ("liftGammaGain.gamma.r", self.lift_gamma_gain.gamma.r),
+            ("liftGammaGain.gamma.g", self.lift_gamma_gain.gamma.g),
+            ("liftGammaGain.gamma.b", self.lift_gamma_gain.gamma.b),
+        ] {
+            if !value.is_finite() || value <= 0.0 || value > 4.0 {
+                return Err(ColorGradeValidationError {
+                    field,
+                    rule: "finite and within (0, 4]",
+                });
+            }
+        }
+        for (field, value) in [
+            ("liftGammaGain.gain.r", self.lift_gamma_gain.gain.r),
+            ("liftGammaGain.gain.g", self.lift_gamma_gain.gain.g),
+            ("liftGammaGain.gain.b", self.lift_gamma_gain.gain.b),
+        ] {
+            inclusive(field, value, 0.0..=4.0, "finite and within [0, 4]")?;
+        }
+        inclusive(
+            "contrast",
+            self.contrast,
+            -1.0..=2.0,
+            "finite and within [-1, 2]",
+        )?;
+        inclusive(
+            "saturation",
+            self.saturation,
+            0.0..=3.0,
+            "finite and within [0, 3]",
+        )?;
+        if let Some(secondary) = self.hsl_secondary {
+            inclusive(
+                "hslSecondary.hueCenter",
+                secondary.hue_center,
+                0.0..=1.0,
+                "finite and within [0, 1]",
+            )?;
+            if !secondary.hue_width.is_finite()
+                || secondary.hue_width <= 0.0
+                || secondary.hue_width > 1.0
+            {
+                return Err(ColorGradeValidationError {
+                    field: "hslSecondary.hueWidth",
+                    rule: "finite and within (0, 1]",
+                });
+            }
+            inclusive(
+                "hslSecondary.feather",
+                secondary.feather,
+                0.0..=0.5,
+                "finite and within [0, 0.5]",
+            )?;
+            inclusive(
+                "hslSecondary.hueShift",
+                secondary.hue_shift,
+                -0.5..=0.5,
+                "finite and within [-0.5, 0.5]",
+            )?;
+            inclusive(
+                "hslSecondary.saturation",
+                secondary.saturation,
+                -1.0..=1.0,
+                "finite and within [-1, 1]",
+            )?;
+            inclusive(
+                "hslSecondary.lightness",
+                secondary.lightness,
+                -1.0..=1.0,
+                "finite and within [-1, 1]",
+            )?;
+        }
+        Ok(())
     }
 
     /// Per-channel white-balance gain derived from `temperature` / `tint`. A
@@ -266,6 +535,14 @@ impl ColorGrade {
             bb = l + (bb - l) * self.saturation;
         }
 
+        // 6. Feathered HSL secondary qualifier.
+        if let Some(secondary) = self
+            .hsl_secondary
+            .filter(|secondary| !secondary.is_identity())
+        {
+            (rr, gg, bb) = secondary.apply(rr, gg, bb);
+        }
+
         (clamp01(rr), clamp01(gg), clamp01(bb))
     }
 }
@@ -421,7 +698,7 @@ pub enum MaskShape {
 /// [`crate::transform::Point`] only to keep mask serialization self-contained and
 /// `Serialize`/`Deserialize`-derivable (the transform `Point` has hand-written
 /// (de)serialization elsewhere; here a plain derive is what we want).
-#[derive(Clone, Copy, PartialEq, Debug, Serialize, Deserialize)]
+#[derive(Clone, Copy, PartialEq, Debug, Default, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Point2 {
     #[serde(default)]
@@ -436,6 +713,56 @@ impl Point2 {
     }
 }
 
+/// Optional whole-mask transform applied around the canvas center after the
+/// shape's own geometry. Shape coordinates remain editable and portable while
+/// offset/scale/rotation can move the complete mask non-destructively.
+#[derive(Clone, Copy, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MaskTransform {
+    #[serde(default)]
+    pub offset: Point2,
+    #[serde(default = "default_mask_scale")]
+    pub scale: Point2,
+    #[serde(default)]
+    pub rotation_degrees: f64,
+}
+
+fn default_mask_scale() -> Point2 {
+    Point2::new(1.0, 1.0)
+}
+
+impl Default for MaskTransform {
+    fn default() -> Self {
+        MaskTransform {
+            offset: Point2::new(0.0, 0.0),
+            scale: default_mask_scale(),
+            rotation_degrees: 0.0,
+        }
+    }
+}
+
+impl MaskTransform {
+    pub fn is_identity(&self) -> bool {
+        self.offset.x == 0.0
+            && self.offset.y == 0.0
+            && self.scale.x == 1.0
+            && self.scale.y == 1.0
+            && self.rotation_degrees == 0.0
+    }
+
+    fn inverse_point(&self, x: f64, y: f64) -> (f64, f64) {
+        let sx = self.scale.x.abs().max(f64::EPSILON);
+        let sy = self.scale.y.abs().max(f64::EPSILON);
+        let radians = self.rotation_degrees.to_radians();
+        let (sin, cos) = radians.sin_cos();
+        let dx = x - 0.5 - self.offset.x;
+        let dy = y - 0.5 - self.offset.y;
+        let unrotated_x = cos * dx + sin * dy;
+        let unrotated_y = -sin * dx + cos * dy;
+        (unrotated_x / sx + 0.5, unrotated_y / sy + 0.5)
+    }
+}
+
 /// A vector mask that generates a per-pixel alpha coverage. `feather` softens the
 /// edge; `invert` flips inside/outside.
 ///
@@ -452,6 +779,9 @@ pub struct Mask {
     /// Invert coverage (mask out the inside instead of the outside).
     #[serde(default)]
     pub invert: bool,
+    /// Non-destructive whole-mask translation, scale, and rotation.
+    #[serde(default, skip_serializing_if = "MaskTransform::is_identity")]
+    pub transform: MaskTransform,
 }
 
 fn default_mask_shape() -> MaskShape {
@@ -468,6 +798,7 @@ impl Default for Mask {
             shape: default_mask_shape(),
             feather: 0.0,
             invert: false,
+            transform: MaskTransform::default(),
         }
     }
 }
@@ -478,6 +809,7 @@ impl Mask {
     /// polygon variant returns the unsigned distance with an inside/outside sign
     /// from an even-odd test (an exact polygon SDF is overkill for feathering).
     pub fn signed_distance(&self, x: f64, y: f64) -> f64 {
+        let (x, y) = self.transform.inverse_point(x, y);
         match &self.shape {
             MaskShape::Linear { point, normal } => {
                 // Signed distance along the (assumed unit-ish) normal. We
@@ -590,20 +922,129 @@ fn point_segment_dist2(px: f64, py: f64, ax: f64, ay: f64, bx: f64, by: f64) ->
 // Effect (generic named-parameter effect chain)
 // ===========================================================================
 
-/// A generic named pixel effect with a flat parameter map — the extensible chain
-/// the spec calls for (`Clip.effects: Vec<Effect>`, each = one wgpu pass). The
-/// `name` selects a shader/kernel; `params` are its named scalar inputs and
-/// `enabled` lets a clip carry a disabled effect without removing it.
-///
-/// Concrete effects (blur, glow, sharpen, ...) are deferred (see module TODO);
-/// this type and its serde/round-trip are the stable contract that ops + agent
-/// tools target now, and the render layer can grow per-name handling
-/// incrementally without further domain changes.
+/// Maximum authored effects evaluated for one clip. A fixed bound keeps the
+/// persisted contract aligned with the portable GPU uniform layout.
+pub const MAX_EFFECTS_PER_CLIP: usize = 8;
+
+/// One persisted scalar in an advertised effect's closed schema.
+#[derive(Clone, Copy, PartialEq, Debug)]
+pub struct EffectParameterDescriptor {
+    pub name: &'static str,
+    pub default: f64,
+    pub min: f64,
+    pub max: f64,
+}
+
+/// An effect available to the editor, agent tools, preview, and export.
+#[derive(Clone, Copy, PartialEq, Debug)]
+pub struct EffectDescriptor {
+    pub name: &'static str,
+    pub parameters: &'static [EffectParameterDescriptor],
+}
+
+const AMOUNT_PARAMETER: [EffectParameterDescriptor; 1] = [EffectParameterDescriptor {
+    name: "amount",
+    default: 1.0,
+    min: 0.0,
+    max: 1.0,
+}];
+
+const EFFECT_REGISTRY: [EffectDescriptor; 3] = [
+    EffectDescriptor {
+        name: "grayscale",
+        parameters: &AMOUNT_PARAMETER,
+    },
+    EffectDescriptor {
+        name: "sepia",
+        parameters: &AMOUNT_PARAMETER,
+    },
+    EffectDescriptor {
+        name: "invert",
+        parameters: &AMOUNT_PARAMETER,
+    },
+];
+
+/// The complete effect list advertised by every product surface.
+pub fn effect_registry() -> &'static [EffectDescriptor] {
+    &EFFECT_REGISTRY
+}
+
+/// Typed rejection for invalid persisted effect data.
+#[derive(Clone, PartialEq, Debug)]
+pub enum EffectValidationError {
+    TooManyEffects {
+        count: usize,
+        limit: usize,
+    },
+    UnknownEffect {
+        name: String,
+    },
+    UnknownParameter {
+        effect: String,
+        parameter: String,
+    },
+    NonFiniteParameter {
+        effect: String,
+        parameter: String,
+    },
+    ParameterOutOfRange {
+        effect: String,
+        parameter: String,
+        value: f64,
+        min: f64,
+        max: f64,
+    },
+}
+
+impl std::fmt::Display for EffectValidationError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::TooManyEffects { count, limit } => {
+                write!(f, "effect chain contains {count} entries; limit is {limit}")
+            }
+            Self::UnknownEffect { name } => write!(f, "unknown effect `{name}`"),
+            Self::UnknownParameter { effect, parameter } => {
+                write!(f, "unknown parameter `{parameter}` for effect `{effect}`")
+            }
+            Self::NonFiniteParameter { effect, parameter } => write!(
+                f,
+                "parameter `{parameter}` for effect `{effect}` must be finite"
+            ),
+            Self::ParameterOutOfRange {
+                effect,
+                parameter,
+                value,
+                min,
+                max,
+            } => write!(
+                f,
+                "parameter `{parameter}` for effect `{effect}` is {value}; expected {min}..={max}"
+            ),
+        }
+    }
+}
+
+impl std::error::Error for EffectValidationError {}
+
+/// Validate a complete authored chain before an edit or render boundary.
+pub fn validate_effect_chain(effects: &[Effect]) -> Result<(), EffectValidationError> {
+    if effects.len() > MAX_EFFECTS_PER_CLIP {
+        return Err(EffectValidationError::TooManyEffects {
+            count: effects.len(),
+            limit: MAX_EFFECTS_PER_CLIP,
+        });
+    }
+    effects.iter().try_for_each(Effect::validate)
+}
+
+/// A named pixel effect with a flat parameter map. Names and parameters remain
+/// string-keyed for stable JSON compatibility, but every edit and render path
+/// validates them against [`effect_registry`] rather than silently ignoring an
+/// unknown value.
 #[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Effect {
-    /// Effect identifier (e.g. `"gaussianBlur"`). Free-form; the render layer maps
-    /// known names to passes and ignores unknown ones.
+    /// Identifier from [`effect_registry`].
     pub name: String,
     /// Named scalar parameters. Insertion-stable ordering is not required; the
     /// render layer reads by key.
@@ -638,6 +1079,60 @@ impl Effect {
     pub fn param(&self, key: &str, default: f64) -> f64 {
         self.params.get(key).copied().unwrap_or(default)
     }
+
+    /// Validate this persisted value against the advertised closed schema.
+    pub fn validate(&self) -> Result<(), EffectValidationError> {
+        let descriptor = effect_registry()
+            .iter()
+            .find(|candidate| candidate.name == self.name)
+            .ok_or_else(|| EffectValidationError::UnknownEffect {
+                name: self.name.clone(),
+            })?;
+        for (name, value) in &self.params {
+            let parameter = descriptor
+                .parameters
+                .iter()
+                .find(|candidate| candidate.name == name)
+                .ok_or_else(|| EffectValidationError::UnknownParameter {
+                    effect: self.name.clone(),
+                    parameter: name.clone(),
+                })?;
+            if !value.is_finite() {
+                return Err(EffectValidationError::NonFiniteParameter {
+                    effect: self.name.clone(),
+                    parameter: name.clone(),
+                });
+            }
+            if *value < parameter.min || *value > parameter.max {
+                return Err(EffectValidationError::ParameterOutOfRange {
+                    effect: self.name.clone(),
+                    parameter: name.clone(),
+                    value: *value,
+                    min: parameter.min,
+                    max: parameter.max,
+                });
+            }
+        }
+        Ok(())
+    }
+
+    /// Read a registered scalar using its schema default.
+    pub fn registered_param(&self, key: &str) -> Result<f64, EffectValidationError> {
+        self.validate()?;
+        let descriptor = effect_registry()
+            .iter()
+            .find(|candidate| candidate.name == self.name)
+            .expect("validated effect is registered");
+        let parameter = descriptor
+            .parameters
+            .iter()
+            .find(|candidate| candidate.name == key)
+            .ok_or_else(|| EffectValidationError::UnknownParameter {
+                effect: self.name.clone(),
+                parameter: key.to_owned(),
+            })?;
+        Ok(self.param(key, parameter.default))
+    }
 }
 
 #[cfg(test)]
@@ -748,6 +1243,21 @@ mod tests {
         let (r, gg, _) = g.apply_linear(0.4, 0.4, 0.0);
         approx(r, 0.2); // 0.4 * 0.5
         approx(gg, 0.4); // unchanged
+
+        // The authored color-wheel contract is:
+        // gain * (x + lift * (1 - x)) ^ (1 / gamma). Lift therefore rolls off
+        // toward the highlights instead of adding the same offset everywhere,
+        // and gain remains an independent highlight multiplier outside gamma.
+        let combined = ColorGrade {
+            lift_gamma_gain: LiftGammaGain {
+                lift: Rgb::new(0.1, 0.0, 0.0),
+                gamma: Rgb::new(2.0, 1.0, 1.0),
+                gain: Rgb::new(0.8, 1.0, 1.0),
+            },
+            ..Default::default()
+        };
+        let (combined_r, _, _) = combined.apply_linear(0.25, 0.0, 0.0);
+        approx(combined_r, 0.8 * 0.325_f64.sqrt());
     }
 
     #[test]
@@ -761,6 +1271,32 @@ mod tests {
         };
         let (r, _, _) = g.apply_linear(0.0, 0.0, 0.0);
         approx(r, 0.1);
+        let (white, _, _) = g.apply_linear(1.0, 0.0, 0.0);
+        approx(white, 1.0);
+    }
+
+    #[test]
+    fn color_grade_rejects_non_finite_and_zero_gamma() {
+        let zero_gamma = ColorGrade {
+            lift_gamma_gain: LiftGammaGain {
+                gamma: Rgb::new(0.0, 1.0, 1.0),
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        assert_eq!(
+            zero_gamma.validate().unwrap_err().to_string(),
+            "liftGammaGain.gamma.r must be finite and within (0, 4]"
+        );
+
+        let non_finite = ColorGrade {
+            exposure: f64::NAN,
+            ..Default::default()
+        };
+        assert_eq!(
+            non_finite.validate().unwrap_err().to_string(),
+            "exposure must be finite and within [-5, 5]"
+        );
     }
 
     // --- ColorGrade serde ---
@@ -778,9 +1314,18 @@ mod tests {
             },
             contrast: 0.3,
             saturation: 1.2,
+            hsl_secondary: Some(HslSecondary {
+                hue_center: 0.98,
+                hue_width: 0.2,
+                feather: 0.05,
+                hue_shift: 0.1,
+                saturation: -0.2,
+                lightness: 0.05,
+            }),
         };
         let json = serde_json::to_string(&g).unwrap();
         assert!(json.contains("\"liftGammaGain\""));
+        assert!(json.contains("\"hslSecondary\""));
         assert!(json.contains("\"exposure\":0.5"));
         let back: ColorGrade = serde_json::from_str(&json).unwrap();
         assert_eq!(g, back);
@@ -792,6 +1337,42 @@ mod tests {
         assert!(g.is_identity());
     }
 
+    #[test]
+    fn hsl_secondary_wraps_red_and_isolates_other_hues() {
+        let grade = ColorGrade {
+            hsl_secondary: Some(HslSecondary {
+                hue_center: 0.98,
+                hue_width: 0.16,
+                feather: 0.04,
+                hue_shift: 0.2,
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+        grade.validate().unwrap();
+        let red = grade.apply_linear(1.0, 0.0, 0.0);
+        assert!(
+            red.1 > 0.2 || red.2 > 0.2,
+            "wrapped red must rotate: {red:?}"
+        );
+        let green = grade.apply_linear(0.0, 1.0, 0.0);
+        approx(green.0, 0.0);
+        approx(green.1, 1.0);
+        approx(green.2, 0.0);
+
+        let invalid = ColorGrade {
+            hsl_secondary: Some(HslSecondary {
+                hue_width: 0.0,
+                ..Default::default()
+            }),
+            ..Default::default()
+        };
+        assert_eq!(
+            invalid.validate().unwrap_err().to_string(),
+            "hslSecondary.hueWidth must be finite and within (0, 1]"
+        );
+    }
+
     #[test]
     fn color_grade_partial_decode_keeps_other_defaults() {
         let g: ColorGrade = serde_json::from_str(r#"{"exposure":1.0}"#).unwrap();
@@ -901,6 +1482,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         approx(m.coverage(0.5, 0.5), 1.0); // center
         approx(m.coverage(0.5, 0.9), 0.0); // outside radius
@@ -915,6 +1497,7 @@ mod tests {
             },
             feather: 0.0,
             invert: true,
+            ..Mask::default()
         };
         approx(m.coverage(0.5, 0.5), 0.0); // center now masked out
         approx(m.coverage(0.5, 0.9), 1.0); // outside now covered
@@ -929,6 +1512,7 @@ mod tests {
             },
             feather: 0.1,
             invert: false,
+            ..Mask::default()
         };
         // Exactly on the boundary -> ~0.5 coverage.
         let c = m.coverage(0.7, 0.5);
@@ -947,6 +1531,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         approx(m.coverage(0.8, 0.5), 1.0); // +normal side covered
         approx(m.coverage(0.2, 0.5), 0.0); // -normal side not
@@ -964,6 +1549,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         approx(m.coverage(0.5, 0.3), 1.0); // inside the triangle
         approx(m.coverage(0.05, 0.05), 0.0); // outside (a corner region)
@@ -977,6 +1563,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         approx(m.coverage(0.5, 0.5), 0.0);
     }
@@ -990,6 +1577,7 @@ mod tests {
             },
             feather: 0.05,
             invert: true,
+            ..Mask::default()
         };
         let json = serde_json::to_string(&m).unwrap();
         assert!(json.contains("\"kind\":\"circle\""));
@@ -1007,6 +1595,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         let json = serde_json::to_string(&m).unwrap();
         assert!(json.contains("\"kind\":\"linear\""));
@@ -1026,6 +1615,7 @@ mod tests {
             },
             feather: 0.0,
             invert: false,
+            ..Mask::default()
         };
         let json = serde_json::to_string(&m).unwrap();
         assert!(json.contains("\"kind\":\"poly\""));
@@ -1033,28 +1623,68 @@ mod tests {
         assert_eq!(m, back);
     }
 
+    #[test]
+    fn mask_transform_is_non_destructive_and_roundtrips() {
+        let base = Mask {
+            shape: MaskShape::Circle {
+                center: Point2::new(0.5, 0.5),
+                radius: Point2::new(0.1, 0.2),
+            },
+            ..Mask::default()
+        };
+        let transformed = Mask {
+            transform: MaskTransform {
+                offset: Point2::new(0.2, -0.1),
+                scale: Point2::new(2.0, 0.5),
+                rotation_degrees: 90.0,
+            },
+            ..base.clone()
+        };
+
+        // The authored shape stays unchanged while its whole-mask transform
+        // moves the local center (0.5, 0.5) to display point (0.7, 0.4).
+        assert_eq!(transformed.shape, base.shape);
+        approx(transformed.coverage(0.7, 0.4), 1.0);
+        approx(transformed.coverage(0.5, 0.5), 0.0);
+
+        let json = serde_json::to_string(&transformed).unwrap();
+        assert!(json.contains("\"transform\""));
+        assert!(json.contains("\"rotationDegrees\":90.0"));
+        assert_eq!(serde_json::from_str::<Mask>(&json).unwrap(), transformed);
+
+        // Legacy/default projects do not gain noisy transform payloads and
+        // deserialize to the identity transform.
+        let default_json = serde_json::to_string(&base).unwrap();
+        assert!(!default_json.contains("\"transform\""));
+        let legacy: Mask = serde_json::from_str(
+            r#"{"shape":{"kind":"circle","center":{"x":0.5,"y":0.5},"radius":{"x":0.1,"y":0.2}},"feather":0.0,"invert":false}"#,
+        )
+        .unwrap();
+        assert!(legacy.transform.is_identity());
+    }
+
     // --- Effect ---
 
     #[test]
     fn effect_new_is_enabled_no_params() {
-        let e = Effect::new("gaussianBlur");
-        assert_eq!(e.name, "gaussianBlur");
+        let e = Effect::new("grayscale");
+        assert_eq!(e.name, "grayscale");
         assert!(e.enabled);
         assert!(e.params.is_empty());
-        approx(e.param("radius", 3.0), 3.0); // default fallback
+        approx(e.registered_param("amount").unwrap(), 1.0);
     }
 
     #[test]
     fn effect_with_param_and_read() {
-        let e = Effect::new("glow").with_param("intensity", 0.8);
-        approx(e.param("intensity", 0.0), 0.8);
+        let e = Effect::new("sepia").with_param("amount", 0.8);
+        approx(e.registered_param("amount").unwrap(), 0.8);
     }
 
     #[test]
     fn effect_roundtrip_with_params() {
-        let e = Effect::new("sharpen").with_param("amount", 0.5);
+        let e = Effect::new("invert").with_param("amount", 0.5);
         let json = serde_json::to_string(&e).unwrap();
-        assert!(json.contains("\"name\":\"sharpen\""));
+        assert!(json.contains("\"name\":\"invert\""));
         assert!(json.contains("\"amount\":0.5"));
         let back: Effect = serde_json::from_str(&json).unwrap();
         assert_eq!(e, back);
diff --git a/crates/opentake-domain/src/lib.rs b/crates/opentake-domain/src/lib.rs
index 18bb40c8..c687ea3a 100644
--- a/crates/opentake-domain/src/lib.rs
+++ b/crates/opentake-domain/src/lib.rs
@@ -20,43 +20,59 @@
 //! Zero IO, pure logic, fully unit-testable. The only runtime dependency is
 //! `serde`; persistence-side UUID repair belongs to `opentake-project`.
 
+pub mod audio;
 pub mod caption_sync;
 pub mod clip;
 pub mod clip_type;
 mod clip_wire;
 pub mod grade;
 pub mod keyframe;
+pub mod lut;
 pub mod media;
 pub mod signal;
 pub mod split;
+pub mod stabilization;
 pub mod subtitle_export;
 pub mod text;
 mod text_wire;
 pub mod timeline;
 pub mod transform;
+pub mod transition;
 
 // Flat re-export of the public domain API for ergonomic downstream use.
+pub use audio::{AudioDenoise, DenoiseMode, LoudnessNormalization};
 pub use caption_sync::{caption_group_ids, clips_in_group, sync_caption_group_style};
-pub use clip::{Clip, FadeEdge, KeyframeTrackWireField, KeyframeValueWireShape, VolumeScale};
+pub use clip::{
+    CaptionTranslationInput, Clip, FadeEdge, KeyframeTrackWireField, KeyframeValueWireShape,
+    VolumeScale,
+};
 pub use clip_type::ClipType;
 pub use grade::{
-    chroma_cb_cr, luma709, smoothstep01, ChromaKey, ColorGrade, Effect, LiftGammaGain, Mask,
-    MaskShape, Point2, Rgb,
+    chroma_cb_cr, effect_registry, luma709, smoothstep01, validate_effect_chain, ChromaKey,
+    ColorGrade, ColorGradeValidationError, ColorMatchInput, Effect, EffectDescriptor,
+    EffectParameterDescriptor, EffectValidationError, HslSecondary, LiftGammaGain, Mask, MaskShape,
+    MaskTransform, Point2, Rgb, MAX_EFFECTS_PER_CLIP, MAX_MASKS_PER_CLIP, MAX_POLYGON_MASK_POINTS,
 };
 pub use keyframe::{
     smoothstep, split_keyframe_track, AnimPair, AnimatableProperty, Interpolation, Keyframe,
     KeyframeInterpolatable, KeyframeTrack,
 };
+pub use lut::{CubeLut, CubeLutError, LutReference, LutReferenceValidationError};
 pub use media::{
-    GenerationInput, GenerationJobStatus, GenerationStatus, MediaAsset, MediaFolder, MediaManifest,
-    MediaManifestEntry, MediaResolver, MediaSource,
+    GenerationInput, GenerationJobStatus, GenerationStatus, MediaAsset, MediaColorMetadata,
+    MediaFolder, MediaManifest, MediaManifestEntry, MediaProxy, MediaResolver, MediaSource,
 };
 pub use signal::{
     ContextSignal, EditingSkeleton, EditingStage, StageGuidance, TrackHint, TrackRole,
     TrackRoleAssignment, VideoType,
 };
 pub use split::split_clip;
+pub use stabilization::{StabilizationKeyframe, StabilizationTrack, StabilizationTransform};
 pub use subtitle_export::{collect_caption_cues, export_srt, export_vtt, SubtitleCue};
 pub use text::{Fill, Rgba, Shadow, TextAlignment, TextLayout, TextStyle};
-pub use timeline::{ClipLocation, Timeline, Track};
+pub use timeline::{
+    ClipLocation, NestedSequence, ScriptAssemblyPlan, ScriptAssemblySegment, Timeline, Track,
+    VoiceModelRecord,
+};
 pub use transform::{Crop, CropAspectLock, Point, Transform};
+pub use transition::{Transition, TransitionKind};
diff --git a/crates/opentake-domain/src/lut.rs b/crates/opentake-domain/src/lut.rs
new file mode 100644
index 00000000..b1e29f13
--- /dev/null
+++ b/crates/opentake-domain/src/lut.rs
@@ -0,0 +1,350 @@
+//! Pure domain model and bounded parser for project-managed 3D `.cube` LUTs.
+//!
+//! File I/O belongs to the desktop/project layers. This module accepts an
+//! already-bounded byte slice, validates the complete table, and exposes only
+//! finite data suitable for GPU upload.
+
+use serde::{Deserialize, Serialize};
+
+/// Authored reference persisted on a clip. The content hash is also the only
+/// allowed storage key; no ambient source path is retained in project JSON.
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LutReference {
+    pub id: String,
+    pub name: String,
+    pub intensity: f64,
+}
+
+impl LutReference {
+    pub fn new(
+        id: impl Into<String>,
+        name: impl Into<String>,
+        intensity: f64,
+    ) -> Result<Self, LutReferenceValidationError> {
+        let reference = Self {
+            id: id.into(),
+            name: name.into(),
+            intensity,
+        };
+        reference.validate()?;
+        Ok(reference)
+    }
+
+    pub fn validate(&self) -> Result<(), LutReferenceValidationError> {
+        if self.id.len() != 64
+            || !self
+                .id
+                .bytes()
+                .all(|byte| byte.is_ascii_digit() || (b'a'..=b'f').contains(&byte))
+        {
+            return Err(LutReferenceValidationError::InvalidId);
+        }
+        if self.name.is_empty() || self.name.len() > 128 || self.name.chars().any(char::is_control)
+        {
+            return Err(LutReferenceValidationError::InvalidName);
+        }
+        if !self.intensity.is_finite() || !(0.0..=1.0).contains(&self.intensity) {
+            return Err(LutReferenceValidationError::InvalidIntensity);
+        }
+        Ok(())
+    }
+
+    /// Canonical bundle-relative location. It is derived, never deserialized.
+    pub fn relative_path(&self) -> String {
+        format!("media/luts/{}.cube", self.id)
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub enum LutReferenceValidationError {
+    InvalidId,
+    InvalidName,
+    InvalidIntensity,
+}
+
+impl std::fmt::Display for LutReferenceValidationError {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        formatter.write_str(match self {
+            Self::InvalidId => "id must be a lowercase 64-character SHA-256 digest",
+            Self::InvalidName => "name must contain 1..=128 bytes without control characters",
+            Self::InvalidIntensity => "intensity must be finite and within [0, 1]",
+        })
+    }
+}
+
+impl std::error::Error for LutReferenceValidationError {}
+
+/// Fully validated 3D table in `.cube` red-fastest order.
+#[derive(Clone, PartialEq, Debug)]
+pub struct CubeLut {
+    title: Option<String>,
+    size: u32,
+    domain_min: [f32; 3],
+    domain_max: [f32; 3],
+    table: Vec<[f32; 3]>,
+}
+
+impl CubeLut {
+    /// Hard read/parse ceiling for an untrusted input file.
+    pub const MAX_BYTES: usize = 4 * 1024 * 1024;
+
+    pub fn parse(bytes: &[u8]) -> Result<Self, CubeLutError> {
+        if bytes.len() > Self::MAX_BYTES {
+            return Err(CubeLutError::TooLarge {
+                actual: bytes.len(),
+                maximum: Self::MAX_BYTES,
+            });
+        }
+        let text = std::str::from_utf8(bytes).map_err(|_| CubeLutError::InvalidUtf8)?;
+        let mut title = None;
+        let mut size = None;
+        let mut domain_min = None;
+        let mut domain_max = None;
+        let mut table = Vec::new();
+
+        for (zero_line, raw) in text.lines().enumerate() {
+            let line_number = zero_line + 1;
+            let line = raw.split('#').next().unwrap_or_default().trim();
+            if line.is_empty() {
+                continue;
+            }
+            let fields = line.split_whitespace().collect::<Vec<_>>();
+            match fields[0] {
+                "TITLE" => {
+                    if title.is_some() {
+                        return Err(CubeLutError::DuplicateDirective { directive: "TITLE" });
+                    }
+                    let value = line["TITLE".len()..].trim().trim_matches('"');
+                    if value.is_empty() || value.len() > 128 || value.chars().any(char::is_control)
+                    {
+                        return Err(CubeLutError::InvalidDirective {
+                            line: line_number,
+                            directive: "TITLE",
+                        });
+                    }
+                    title = Some(value.to_owned());
+                }
+                "LUT_3D_SIZE" => {
+                    if size.is_some() {
+                        return Err(CubeLutError::DuplicateDirective {
+                            directive: "LUT_3D_SIZE",
+                        });
+                    }
+                    if fields.len() != 2 {
+                        return Err(CubeLutError::InvalidDirective {
+                            line: line_number,
+                            directive: "LUT_3D_SIZE",
+                        });
+                    }
+                    let parsed =
+                        fields[1]
+                            .parse::<u32>()
+                            .map_err(|_| CubeLutError::InvalidDirective {
+                                line: line_number,
+                                directive: "LUT_3D_SIZE",
+                            })?;
+                    if !matches!(parsed, 17 | 33) {
+                        return Err(CubeLutError::UnsupportedSize(parsed));
+                    }
+                    size = Some(parsed);
+                    table.reserve(parsed as usize * parsed as usize * parsed as usize);
+                }
+                "DOMAIN_MIN" => {
+                    if domain_min.is_some() {
+                        return Err(CubeLutError::DuplicateDirective {
+                            directive: "DOMAIN_MIN",
+                        });
+                    }
+                    domain_min = Some(parse_triplet(&fields, line_number, "DOMAIN_MIN")?);
+                }
+                "DOMAIN_MAX" => {
+                    if domain_max.is_some() {
+                        return Err(CubeLutError::DuplicateDirective {
+                            directive: "DOMAIN_MAX",
+                        });
+                    }
+                    domain_max = Some(parse_triplet(&fields, line_number, "DOMAIN_MAX")?);
+                }
+                directive if directive.as_bytes()[0].is_ascii_alphabetic() => {
+                    return Err(CubeLutError::UnsupportedDirective {
+                        line: line_number,
+                        directive: directive.to_owned(),
+                    });
+                }
+                _ => {
+                    if size.is_none() {
+                        return Err(CubeLutError::TableBeforeSize { line: line_number });
+                    }
+                    let value = parse_triplet(&fields, line_number, "table row")?;
+                    if value.iter().any(|channel| channel.abs() > 16.0) {
+                        return Err(CubeLutError::OutOfRangeValue { line: line_number });
+                    }
+                    table.push(value);
+                }
+            }
+        }
+
+        let size = size.ok_or(CubeLutError::MissingSize)?;
+        let expected = size as usize * size as usize * size as usize;
+        if table.len() != expected {
+            return Err(CubeLutError::WrongTableLength {
+                expected,
+                actual: table.len(),
+            });
+        }
+        let domain_min = domain_min.unwrap_or([0.0; 3]);
+        let domain_max = domain_max.unwrap_or([1.0; 3]);
+        if (0..3).any(|channel| domain_min[channel] >= domain_max[channel]) {
+            return Err(CubeLutError::InvalidDomain);
+        }
+        Ok(Self {
+            title,
+            size,
+            domain_min,
+            domain_max,
+            table,
+        })
+    }
+
+    pub fn title(&self) -> Option<&str> {
+        self.title.as_deref()
+    }
+
+    pub fn size(&self) -> u32 {
+        self.size
+    }
+
+    pub fn domain_min(&self) -> [f32; 3] {
+        self.domain_min
+    }
+
+    pub fn domain_max(&self) -> [f32; 3] {
+        self.domain_max
+    }
+
+    pub fn table(&self) -> &[[f32; 3]] {
+        &self.table
+    }
+}
+
+fn parse_triplet(
+    fields: &[&str],
+    line: usize,
+    directive: &'static str,
+) -> Result<[f32; 3], CubeLutError> {
+    if fields.len() != 4 && directive != "table row"
+        || fields.len() != 3 && directive == "table row"
+    {
+        return Err(CubeLutError::InvalidDirective { line, directive });
+    }
+    let offset = usize::from(directive != "table row");
+    let mut value = [0.0; 3];
+    for channel in 0..3 {
+        value[channel] = fields[channel + offset]
+            .parse::<f32>()
+            .map_err(|_| CubeLutError::InvalidNumber { line })?;
+        if !value[channel].is_finite() {
+            return Err(CubeLutError::InvalidNumber { line });
+        }
+    }
+    Ok(value)
+}
+
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub enum CubeLutError {
+    TooLarge {
+        actual: usize,
+        maximum: usize,
+    },
+    InvalidUtf8,
+    DuplicateDirective {
+        directive: &'static str,
+    },
+    InvalidDirective {
+        line: usize,
+        directive: &'static str,
+    },
+    UnsupportedDirective {
+        line: usize,
+        directive: String,
+    },
+    UnsupportedSize(u32),
+    TableBeforeSize {
+        line: usize,
+    },
+    MissingSize,
+    InvalidNumber {
+        line: usize,
+    },
+    OutOfRangeValue {
+        line: usize,
+    },
+    InvalidDomain,
+    WrongTableLength {
+        expected: usize,
+        actual: usize,
+    },
+}
+
+impl std::fmt::Display for CubeLutError {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::TooLarge { actual, maximum } => {
+                write!(formatter, "LUT is {actual} bytes; maximum is {maximum}")
+            }
+            Self::InvalidUtf8 => formatter.write_str("LUT is not valid UTF-8 text"),
+            Self::DuplicateDirective { directive } => {
+                write!(formatter, "duplicate {directive} directive")
+            }
+            Self::InvalidDirective { line, directive } => {
+                write!(formatter, "invalid {directive} on line {line}")
+            }
+            Self::UnsupportedDirective { line, directive } => write!(
+                formatter,
+                "unsupported directive {directive} on line {line}"
+            ),
+            Self::UnsupportedSize(size) => {
+                write!(formatter, "unsupported LUT size {size}; expected 17 or 33")
+            }
+            Self::TableBeforeSize { line } => {
+                write!(formatter, "table row before LUT_3D_SIZE on line {line}")
+            }
+            Self::MissingSize => formatter.write_str("missing LUT_3D_SIZE"),
+            Self::InvalidNumber { line } => {
+                write!(formatter, "invalid finite number on line {line}")
+            }
+            Self::OutOfRangeValue { line } => {
+                write!(formatter, "table value outside [-16, 16] on line {line}")
+            }
+            Self::InvalidDomain => {
+                formatter.write_str("each DOMAIN_MIN channel must be less than DOMAIN_MAX")
+            }
+            Self::WrongTableLength { expected, actual } => write!(
+                formatter,
+                "LUT table has {actual} rows; expected {expected}"
+            ),
+        }
+    }
+}
+
+impl std::error::Error for CubeLutError {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn rejects_duplicate_metadata_and_non_finite_domain() {
+        let duplicate = b"LUT_3D_SIZE 17\nLUT_3D_SIZE 17\n";
+        assert!(matches!(
+            CubeLut::parse(duplicate),
+            Err(CubeLutError::DuplicateDirective { .. })
+        ));
+        let non_finite = b"LUT_3D_SIZE 17\nDOMAIN_MIN NaN 0 0\n";
+        assert!(matches!(
+            CubeLut::parse(non_finite),
+            Err(CubeLutError::InvalidNumber { .. })
+        ));
+    }
+}
diff --git a/crates/opentake-domain/src/media.rs b/crates/opentake-domain/src/media.rs
index 36c27d15..09622812 100644
--- a/crates/opentake-domain/src/media.rs
+++ b/crates/opentake-domain/src/media.rs
@@ -50,6 +50,54 @@ pub enum MediaSource {
     Project { relative_path: String },
 }
 
+/// Source color signalling retained from the first playable video stream.
+/// Values use FFmpeg's stable tokens (`bt709`, `bt2020`, `smpte2084`,
+/// `arib-std-b67`, ...). Keeping the original tokens makes older/newer codecs
+/// forward-compatible while helpers can still identify the HDR transfers that
+/// require explicit tone mapping in the current SDR compositor.
+#[derive(Clone, PartialEq, Eq, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MediaColorMetadata {
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub primaries: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub transfer: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub matrix: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub range: Option<String>,
+}
+
+impl MediaColorMetadata {
+    pub fn is_hdr(&self) -> bool {
+        self.transfer.as_deref().is_some_and(|transfer| {
+            matches!(
+                transfer.to_ascii_lowercase().as_str(),
+                "smpte2084" | "pq" | "arib-std-b67" | "hlg"
+            )
+        })
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.primaries.is_none()
+            && self.transfer.is_none()
+            && self.matrix.is_none()
+            && self.range.is_none()
+    }
+}
+
+/// Project-local low-resolution media used only for interactive playback.
+/// Export always resolves [`MediaManifestEntry::source`]. The source digest
+/// prevents a stale proxy being paired with bytes that changed in place.
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MediaProxy {
+    pub relative_path: String,
+    pub source_sha256: String,
+    pub width: u32,
+    pub height: u32,
+}
+
 /// Full serializable input snapshot for a generated asset. 1:1 port of
 /// `GenerationInput`. `prompt` / `model` / `duration` / `aspect_ratio` are
 /// required upstream; everything else is optional.
@@ -150,6 +198,13 @@ pub struct GenerationInput {
     /// recorded once in the generation log when a provider supplies it.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub estimated_cost_credits: Option<i64>,
+    /// Explicit user-consent record supplied for identity-bearing generation.
+    /// This is an opaque local audit id, never a credential.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub consent_id: Option<String>,
+    /// SHA-256 of the canonical, non-secret provider request inputs.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub request_hash: Option<String>,
 }
 
 /// Serializable manifest entry. 1:1 port of `MediaManifestEntry`.
@@ -173,6 +228,10 @@ pub struct MediaManifestEntry {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub has_audio: Option<bool>,
     #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub color: Option<MediaColorMetadata>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub proxy: Option<MediaProxy>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub folder_id: Option<String>,
     #[serde(
         rename = "cachedRemoteURL",
@@ -188,6 +247,17 @@ pub struct MediaManifestEntry {
     pub cached_remote_url_expires_at: Option<f64>,
 }
 
+impl MediaManifestEntry {
+    /// Generated local matting derivatives contain straight RGBA from FFmpeg's
+    /// ProRes 4444 decoder. The render adapters use this non-secret provenance
+    /// to request one premultiplication before blending.
+    pub fn carries_straight_alpha(&self) -> bool {
+        self.generation_input.as_ref().is_some_and(|input| {
+            input.provider.as_deref() == Some("opentake-matting") && input.model.starts_with("rvm-")
+        })
+    }
+}
+
 /// A media library folder. 1:1 port of `MediaFolder`.
 #[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -342,6 +412,9 @@ impl MediaManifest {
     }
 }
 
+/// Decode a persisted manifest without confusing the current constructor
+/// version with the legacy wire fallback: an omitted version means schema 1,
+/// while every explicitly stored version is retained verbatim.
 impl<'de> Deserialize<'de> for MediaManifest {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
@@ -446,6 +519,10 @@ pub struct MediaAsset {
     #[serde(default)]
     pub has_audio: bool,
     #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub color: Option<MediaColorMetadata>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub proxy: Option<MediaProxy>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
     pub generation_input: Option<GenerationInput>,
     #[serde(default)]
     pub generation_status: GenerationStatus,
@@ -487,6 +564,8 @@ impl MediaAsset {
             source_height: None,
             source_fps: None,
             has_audio: kind == ClipType::Video,
+            color: None,
+            proxy: None,
             generation_input: None,
             generation_status: GenerationStatus::None,
             folder_id: None,
@@ -509,6 +588,8 @@ impl MediaAsset {
             source_height: entry.source_height,
             source_fps: entry.source_fps,
             has_audio: entry.has_audio.unwrap_or(false),
+            color: entry.color.clone(),
+            proxy: entry.proxy.clone(),
             generation_input: entry.generation_input.clone(),
             generation_status: match entry
                 .generation_input
@@ -602,6 +683,8 @@ impl MediaAsset {
             source_height: self.source_height,
             source_fps: self.source_fps,
             has_audio: Some(self.has_audio),
+            color: self.color.clone(),
+            proxy: self.proxy.clone(),
             folder_id: self.folder_id.clone(),
             cached_remote_url: fresh,
             cached_remote_url_expires_at: expires,
@@ -719,6 +802,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: Some("https://x".into()),
             cached_remote_url_expires_at: Some(700_000_000.0),
@@ -854,6 +939,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -871,6 +958,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -1010,6 +1099,8 @@ mod tests {
             source_height: Some(720),
             source_fps: Some(24.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: Some("f1".into()),
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-domain/src/split.rs b/crates/opentake-domain/src/split.rs
index 68577607..0f9c1c3c 100644
--- a/crates/opentake-domain/src/split.rs
+++ b/crates/opentake-domain/src/split.rs
@@ -43,6 +43,7 @@ pub fn split_clip(clip: &Clip, at_frame: i32, right_id: impl Into<String>) -> Op
         left.trim_end_frame = clip.trim_end_frame + right_source;
     }
     left.fade_out_frames = 0;
+    left.loudness_normalization = None;
     left.clamp_fades_to_duration();
 
     let mut right = clip.clone();
@@ -55,6 +56,7 @@ pub fn split_clip(clip: &Clip, at_frame: i32, right_id: impl Into<String>) -> Op
         right.trim_start_frame = clip.trim_start_frame + left_source;
     }
     right.fade_in_frames = 0;
+    right.loudness_normalization = None;
     right.clamp_fades_to_duration();
 
     // Split every animatable track at the cut, inserting a boundary keyframe so
diff --git a/crates/opentake-domain/src/stabilization.rs b/crates/opentake-domain/src/stabilization.rs
new file mode 100644
index 00000000..bf77bc13
--- /dev/null
+++ b/crates/opentake-domain/src/stabilization.rs
@@ -0,0 +1,188 @@
+//! Persisted, editable video-stabilization solution.
+//!
+//! The track is deliberately separate from the user's authored position/scale/
+//! rotation keyframes. Renderers compose both tracks, so applying or resetting
+//! stabilization never destroys manual animation or source media identity.
+
+use serde::{Deserialize, Serialize};
+
+fn default_strength() -> f64 {
+    1.0
+}
+
+fn default_model_version() -> u32 {
+    1
+}
+
+#[derive(Clone, Copy, PartialEq, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StabilizationTransform {
+    pub translation_x: f64,
+    pub translation_y: f64,
+    pub rotation_degrees: f64,
+}
+
+#[derive(Clone, Copy, PartialEq, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StabilizationKeyframe {
+    pub frame: i32,
+    pub translation_x: f64,
+    pub translation_y: f64,
+    pub rotation_degrees: f64,
+}
+
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StabilizationTrack {
+    pub model: String,
+    #[serde(default = "default_model_version")]
+    pub model_version: u32,
+    pub source_identity: String,
+    #[serde(default = "default_strength")]
+    pub strength: f64,
+    #[serde(default)]
+    pub crop_margin: f64,
+    #[serde(default)]
+    pub keyframes: Vec<StabilizationKeyframe>,
+}
+
+impl StabilizationTrack {
+    /// Linearly sample the correction track at one clip-relative frame.
+    pub fn sample(&self, frame: i32) -> StabilizationTransform {
+        let Some(first) = self.keyframes.first() else {
+            return StabilizationTransform::default();
+        };
+        let strength = self.strength.clamp(0.0, 1.0);
+        let raw = if frame <= first.frame {
+            keyframe_transform(*first)
+        } else if let Some(last) = self.keyframes.last().filter(|last| frame >= last.frame) {
+            keyframe_transform(*last)
+        } else {
+            let pair = self
+                .keyframes
+                .windows(2)
+                .find(|pair| frame >= pair[0].frame && frame <= pair[1].frame)
+                .expect("a sorted stabilization track covers an interior sample");
+            let span = (pair[1].frame - pair[0].frame).max(1) as f64;
+            let t = (frame - pair[0].frame) as f64 / span;
+            StabilizationTransform {
+                translation_x: lerp(pair[0].translation_x, pair[1].translation_x, t),
+                translation_y: lerp(pair[0].translation_y, pair[1].translation_y, t),
+                rotation_degrees: lerp(pair[0].rotation_degrees, pair[1].rotation_degrees, t),
+            }
+        };
+        StabilizationTransform {
+            translation_x: raw.translation_x * strength,
+            translation_y: raw.translation_y * strength,
+            rotation_degrees: raw.rotation_degrees * strength,
+        }
+    }
+
+    /// Conservative uniform zoom needed to keep every output corner covered.
+    /// `aspect_ratio` is output width / height.
+    pub fn crop_scale(&self, aspect_ratio: f64) -> f64 {
+        let aspect = aspect_ratio.max(1e-6);
+        let required = self
+            .keyframes
+            .iter()
+            .map(|keyframe| {
+                let correction = self.sample(keyframe.frame);
+                coverage_scale(correction, aspect)
+            })
+            .fold(1.0_f64, f64::max);
+        required + self.crop_margin.max(0.0) * 2.0
+    }
+
+    pub fn guarantees_coverage(&self, aspect_ratio: f64) -> bool {
+        let scale = self.crop_scale(aspect_ratio);
+        self.keyframes.iter().all(|keyframe| {
+            scale + 1e-12 >= coverage_scale(self.sample(keyframe.frame), aspect_ratio.max(1e-6))
+        })
+    }
+
+    pub fn validate(&self) -> Result<(), String> {
+        if self.model.trim().is_empty() || self.model_version == 0 {
+            return Err("stabilization model and version are required".to_string());
+        }
+        if self.source_identity.trim().is_empty() {
+            return Err("stabilization source identity is required".to_string());
+        }
+        if !(0.0..=1.0).contains(&self.strength) || !self.strength.is_finite() {
+            return Err("stabilization strength must be finite and within 0..=1".to_string());
+        }
+        if !(0.0..=0.5).contains(&self.crop_margin) || !self.crop_margin.is_finite() {
+            return Err("stabilization crop margin must be finite and within 0..=0.5".to_string());
+        }
+        if self.keyframes.len() < 2 {
+            return Err("stabilization requires at least two keyframes".to_string());
+        }
+        let mut previous = None;
+        for keyframe in &self.keyframes {
+            if previous.is_some_and(|frame| keyframe.frame <= frame) {
+                return Err("stabilization keyframes must be strictly increasing".to_string());
+            }
+            if !keyframe.translation_x.is_finite()
+                || !keyframe.translation_y.is_finite()
+                || !keyframe.rotation_degrees.is_finite()
+            {
+                return Err("stabilization keyframes must be finite".to_string());
+            }
+            previous = Some(keyframe.frame);
+        }
+        Ok(())
+    }
+}
+
+fn keyframe_transform(keyframe: StabilizationKeyframe) -> StabilizationTransform {
+    StabilizationTransform {
+        translation_x: keyframe.translation_x,
+        translation_y: keyframe.translation_y,
+        rotation_degrees: keyframe.rotation_degrees,
+    }
+}
+
+fn lerp(a: f64, b: f64, t: f64) -> f64 {
+    a + (b - a) * t.clamp(0.0, 1.0)
+}
+
+fn coverage_scale(correction: StabilizationTransform, aspect: f64) -> f64 {
+    let radians = correction.rotation_degrees.to_radians();
+    let (sin, cos) = radians.sin_cos();
+    let sin = sin.abs();
+    let cos = cos.abs();
+    let translation_x = correction.translation_x.abs();
+    let translation_y = correction.translation_y.abs();
+    let cover_width = cos + sin / aspect + 2.0 * (translation_x + translation_y / aspect);
+    let cover_height = cos + sin * aspect + 2.0 * (translation_y + translation_x * aspect);
+    cover_width.max(cover_height).max(1.0)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn sampling_scales_correction_by_editable_strength() {
+        let track = StabilizationTrack {
+            model: "test".into(),
+            model_version: 1,
+            source_identity: "asset".into(),
+            strength: 0.5,
+            crop_margin: 0.0,
+            keyframes: vec![
+                StabilizationKeyframe::default(),
+                StabilizationKeyframe {
+                    frame: 10,
+                    translation_x: 0.2,
+                    translation_y: -0.1,
+                    rotation_degrees: 4.0,
+                },
+            ],
+        };
+        let sample = track.sample(5);
+        assert!((sample.translation_x - 0.05).abs() < 1e-12);
+        assert!((sample.translation_y + 0.025).abs() < 1e-12);
+        assert!((sample.rotation_degrees - 1.0).abs() < 1e-12);
+        assert!(track.guarantees_coverage(16.0 / 9.0));
+    }
+}
diff --git a/crates/opentake-domain/src/timeline.rs b/crates/opentake-domain/src/timeline.rs
index 0759c8c0..3a2ac0eb 100644
--- a/crates/opentake-domain/src/timeline.rs
+++ b/crates/opentake-domain/src/timeline.rs
@@ -6,12 +6,59 @@
 //! boundary owns UUID repair because it retains the raw JSON needed to
 //! distinguish that placeholder from an explicitly encoded empty string.
 
-use std::collections::HashSet;
+use std::collections::{HashMap, HashSet};
 
 use serde::{Deserialize, Serialize};
 
 use crate::clip::Clip;
 use crate::clip_type::ClipType;
+use crate::transition::TransitionKind;
+
+/// One reviewed script-to-video segment. Exact media identities and frame
+/// duration are persisted before assembly so applying never repeats creative
+/// selection or frame arithmetic.
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ScriptAssemblySegment {
+    pub script: String,
+    pub media_ref: String,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub narration_media_ref: Option<String>,
+    pub duration_frames: i32,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub transition: Option<TransitionKind>,
+}
+
+/// Persisted, reviewable assembly plan. `plan_hash` is the SHA-256 of the
+/// canonical segment payload; planner provenance is deliberately non-secret.
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ScriptAssemblyPlan {
+    pub id: String,
+    pub plan_hash: String,
+    pub planner: String,
+    pub planner_version: u32,
+    pub start_frame: i32,
+    pub segments: Vec<ScriptAssemblySegment>,
+}
+
+/// Durable non-secret record for a provider-hosted cloned voice. Provider
+/// credentials and reference audio bytes never enter the project document.
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct VoiceModelRecord {
+    pub id: String,
+    pub provider: String,
+    pub provider_voice_id: String,
+    pub model: String,
+    pub consent_id: String,
+    pub source_audio_asset_id: String,
+    pub source_audio_sha256: String,
+    pub request_hash: String,
+    pub voice_name: String,
+    #[serde(default)]
+    pub revoked: bool,
+}
 
 /// Clip location inside track storage.
 #[derive(Clone, Copy, PartialEq, Eq, Debug)]
@@ -50,10 +97,45 @@ pub struct Timeline {
     pub height: i32,
     #[serde(default)]
     pub settings_configured: bool,
+    /// Editable child timelines referenced by clips through
+    /// `Clip::nested_sequence_id`. The registry lives on the root timeline so
+    /// every reference has one stable identity and graph cycles are detectable.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub nested_sequences: Vec<NestedSequence>,
+    /// Reviewed script assembly plans. Bounded by the command layer and
+    /// ignored by render/export until explicitly applied.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub script_assembly_plans: Vec<ScriptAssemblyPlan>,
+    /// Consent-bearing provider voice identities. Revoked records remain for
+    /// audit and are rejected by every generation path.
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub voice_models: Vec<VoiceModelRecord>,
     #[serde(default)]
     pub tracks: Vec<Track>,
 }
 
+#[derive(Clone, PartialEq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct NestedSequence {
+    pub id: String,
+    pub name: String,
+    pub timeline: Timeline,
+}
+
+impl NestedSequence {
+    pub const WIRE_FIELDS: &'static [&'static str] = &["id", "name", "timeline"];
+    pub const ID_WIRE_FIELD: &'static str = "id";
+    pub const TIMELINE_WIRE_FIELD: &'static str = "timeline";
+
+    pub fn new(id: impl Into<String>, name: impl Into<String>, timeline: Timeline) -> Self {
+        Self {
+            id: id.into(),
+            name: name.into(),
+            timeline,
+        }
+    }
+}
+
 impl Default for Timeline {
     fn default() -> Self {
         Timeline {
@@ -61,6 +143,9 @@ impl Default for Timeline {
             width: 1920,
             height: 1080,
             settings_configured: false,
+            nested_sequences: Vec::new(),
+            script_assembly_plans: Vec::new(),
+            voice_models: Vec::new(),
             tracks: Vec::new(),
         }
     }
@@ -68,6 +153,9 @@ impl Default for Timeline {
 
 impl Timeline {
     pub const TRACKS_WIRE_FIELD: &'static str = "tracks";
+    pub const NESTED_SEQUENCES_WIRE_FIELD: &'static str = "nestedSequences";
+    pub const SCRIPT_ASSEMBLY_PLANS_WIRE_FIELD: &'static str = "scriptAssemblyPlans";
+    pub const VOICE_MODELS_WIRE_FIELD: &'static str = "voiceModels";
 
     pub fn new() -> Self {
         Timeline::default()
@@ -77,6 +165,121 @@ impl Timeline {
     pub fn total_frames(&self) -> i32 {
         self.tracks.iter().map(|t| t.end_frame()).max().unwrap_or(0)
     }
+
+    /// Validate unique sequence identities, every reference, and graph cycles.
+    /// This is a pure preflight used before edits are committed or plans built.
+    pub fn validate_nested_sequences(&self) -> Result<(), String> {
+        let mut registry = HashMap::new();
+        for sequence in &self.nested_sequences {
+            if sequence.id.is_empty() {
+                return Err("nested sequence id must not be empty".to_string());
+            }
+            if registry.insert(sequence.id.as_str(), sequence).is_some() {
+                return Err(format!("duplicate nested sequence id: {}", sequence.id));
+            }
+            if !sequence.timeline.nested_sequences.is_empty() {
+                return Err(format!(
+                    "nested sequence {} contains a nestedSequences registry; child references must use the root registry",
+                    sequence.id
+                ));
+            }
+        }
+
+        // Several cross-cutting consumers (text resolution, selection, and
+        // edit commands) address clips by id without a sequence namespace.
+        // Once a project has nested timelines, ids therefore must be unique
+        // across the entire stored graph rather than only inside one track.
+        let uses_nested_graph = !self.nested_sequences.is_empty()
+            || self
+                .tracks
+                .iter()
+                .flat_map(|track| &track.clips)
+                .any(|clip| clip.nested_sequence_id.is_some());
+        if uses_nested_graph {
+            let mut clip_ids = HashSet::new();
+            for timeline in std::iter::once(self).chain(
+                self.nested_sequences
+                    .iter()
+                    .map(|sequence| &sequence.timeline),
+            ) {
+                for track in &timeline.tracks {
+                    for clip in &track.clips {
+                        if clip.id.is_empty() {
+                            return Err(
+                                "clip id must not be empty in a nested timeline graph".to_string()
+                            );
+                        }
+                        if !clip_ids.insert(clip.id.as_str()) {
+                            return Err(format!(
+                                "duplicate clip id in nested timeline graph: {}",
+                                clip.id
+                            ));
+                        }
+                        if clip.nested_sequence_id.is_some()
+                            && (track.kind == ClipType::Audio
+                                || clip.media_type != ClipType::Video
+                                || !clip.media_ref.is_empty()
+                                || clip.start_frame < 0
+                                || clip.duration_frames < 1
+                                || clip.trim_start_frame < 0)
+                        {
+                            return Err(format!(
+                                "invalid compound clip representation: {}",
+                                clip.id
+                            ));
+                        }
+                    }
+                }
+            }
+        }
+
+        fn references(timeline: &Timeline) -> impl Iterator<Item = &str> {
+            timeline.tracks.iter().flat_map(|track| {
+                track
+                    .clips
+                    .iter()
+                    .filter_map(|clip| clip.nested_sequence_id.as_deref())
+            })
+        }
+
+        for reference in references(self) {
+            if !registry.contains_key(reference) {
+                return Err(format!("missing nested sequence reference: {reference}"));
+            }
+        }
+
+        fn visit<'a>(
+            id: &'a str,
+            registry: &HashMap<&'a str, &'a NestedSequence>,
+            visiting: &mut Vec<&'a str>,
+            complete: &mut HashSet<&'a str>,
+        ) -> Result<(), String> {
+            if complete.contains(id) {
+                return Ok(());
+            }
+            if let Some(index) = visiting.iter().position(|candidate| *candidate == id) {
+                let mut cycle = visiting[index..].to_vec();
+                cycle.push(id);
+                return Err(format!("nested sequence cycle: {}", cycle.join(" -> ")));
+            }
+            let sequence = registry
+                .get(id)
+                .ok_or_else(|| format!("missing nested sequence reference: {id}"))?;
+            visiting.push(id);
+            for reference in references(&sequence.timeline) {
+                visit(reference, registry, visiting, complete)?;
+            }
+            visiting.pop();
+            complete.insert(id);
+            Ok(())
+        }
+
+        let mut complete = HashSet::new();
+        for sequence in &self.nested_sequences {
+            visit(&sequence.id, &registry, &mut Vec::new(), &mut complete)?;
+        }
+        Ok(())
+    }
 }
 
 fn default_sync_locked() -> bool {
@@ -305,6 +508,55 @@ mod tests {
         assert!(back.settings_configured);
     }
 
+    #[test]
+    fn script_assembly_plan_roundtrips_and_legacy_timelines_default_empty() {
+        let mut timeline = Timeline::new();
+        timeline.script_assembly_plans.push(ScriptAssemblyPlan {
+            id: "plan-1".into(),
+            plan_hash: "a".repeat(64),
+            planner: "opentake-script-assembly".into(),
+            planner_version: 1,
+            start_frame: 42,
+            segments: vec![ScriptAssemblySegment {
+                script: "Opening".into(),
+                media_ref: "visual".into(),
+                narration_media_ref: Some("voice".into()),
+                duration_frames: 30,
+                transition: Some(TransitionKind::CrossDissolve),
+            }],
+        });
+        let json = serde_json::to_string(&timeline).unwrap();
+        assert!(json.contains("\"scriptAssemblyPlans\""));
+        assert_eq!(serde_json::from_str::<Timeline>(&json).unwrap(), timeline);
+        let legacy: Timeline = serde_json::from_str(
+            r#"{"fps":30,"width":1920,"height":1080,"settingsConfigured":true,"tracks":[]}"#,
+        )
+        .unwrap();
+        assert!(legacy.script_assembly_plans.is_empty());
+        assert!(legacy.voice_models.is_empty());
+    }
+
+    #[test]
+    fn voice_model_record_roundtrips_without_secret_material() {
+        let mut timeline = Timeline::new();
+        timeline.voice_models.push(VoiceModelRecord {
+            id: "voice-local-1".into(),
+            provider: "elevenlabs".into(),
+            provider_voice_id: "provider-voice-1".into(),
+            model: "eleven_multilingual_v2".into(),
+            consent_id: "consent-1".into(),
+            source_audio_asset_id: "audio-1".into(),
+            source_audio_sha256: "a".repeat(64),
+            request_hash: "b".repeat(64),
+            voice_name: "Narrator".into(),
+            revoked: false,
+        });
+        let json = serde_json::to_string(&timeline).unwrap();
+        assert!(json.contains("\"voiceModels\""));
+        assert!(!json.contains("apiKey"));
+        assert_eq!(serde_json::from_str::<Timeline>(&json).unwrap(), timeline);
+    }
+
     #[test]
     fn timeline_decode_defaults() {
         let tl: Timeline = serde_json::from_str("{}").unwrap();
@@ -326,6 +578,115 @@ mod tests {
         assert_eq!(tl, back);
     }
 
+    #[test]
+    fn nested_sequence_roundtrip_and_legacy_omission_are_stable() {
+        let legacy: Timeline = serde_json::from_str(r#"{"fps":24,"tracks":[]}"#).unwrap();
+        assert!(legacy.nested_sequences.is_empty());
+        assert!(!serde_json::to_string(&legacy)
+            .unwrap()
+            .contains("nestedSequences"));
+
+        let mut child = Timeline::new();
+        child
+            .tracks
+            .push(Track::new("child-track", ClipType::Video));
+        let mut root = Timeline::new();
+        root.nested_sequences
+            .push(NestedSequence::new("sequence-a", "Scene A", child));
+        let encoded = serde_json::to_string(&root).unwrap();
+        assert!(encoded.contains("\"nestedSequences\""));
+        assert_eq!(serde_json::from_str::<Timeline>(&encoded).unwrap(), root);
+    }
+
+    #[test]
+    fn nested_sequence_validation_is_deterministic_and_fail_closed() {
+        let mut root = Timeline::new();
+        root.nested_sequences
+            .push(NestedSequence::new("", "Empty", Timeline::new()));
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "nested sequence id must not be empty"
+        );
+
+        root.nested_sequences = vec![
+            NestedSequence::new("duplicate", "A", Timeline::new()),
+            NestedSequence::new("duplicate", "B", Timeline::new()),
+        ];
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "duplicate nested sequence id: duplicate"
+        );
+
+        let mut missing_track = Track::new("root-track", ClipType::Video);
+        missing_track
+            .clips
+            .push(Clip::new_nested("compound", "missing", 0, 10));
+        root.nested_sequences.clear();
+        root.tracks = vec![missing_track];
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "missing nested sequence reference: missing"
+        );
+
+        let mut a = Timeline::new();
+        let mut a_track = Track::new("a-track", ClipType::Video);
+        a_track.clips.push(Clip::new_nested("a-to-b", "b", 0, 10));
+        a.tracks.push(a_track);
+        let mut b = Timeline::new();
+        let mut b_track = Track::new("b-track", ClipType::Video);
+        b_track.clips.push(Clip::new_nested("b-to-a", "a", 0, 10));
+        b.tracks.push(b_track);
+        root.tracks.clear();
+        root.nested_sequences = vec![
+            NestedSequence::new("a", "A", a),
+            NestedSequence::new("b", "B", b),
+        ];
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "nested sequence cycle: a -> b -> a"
+        );
+    }
+
+    #[test]
+    fn nested_sequence_validation_rejects_graph_wide_clip_id_collisions() {
+        let mut child = Timeline::new();
+        let mut child_track = Track::new("child-track", ClipType::Video);
+        child_track.clips.push(clip("shared-id", 0, 10));
+        child.tracks.push(child_track);
+
+        let mut root = Timeline::new();
+        let mut root_track = Track::new("root-track", ClipType::Video);
+        root_track.clips.push(clip("shared-id", 0, 10));
+        root_track
+            .clips
+            .push(Clip::new_nested("compound", "sequence", 10, 10));
+        root.tracks.push(root_track);
+        root.nested_sequences
+            .push(NestedSequence::new("sequence", "Scene", child));
+
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "duplicate clip id in nested timeline graph: shared-id"
+        );
+    }
+
+    #[test]
+    fn nested_sequence_validation_rejects_compound_on_audio_track() {
+        let mut root = Timeline::new();
+        let mut track = Track::new("audio-track", ClipType::Audio);
+        track
+            .clips
+            .push(Clip::new_nested("compound", "sequence", 0, 10));
+        root.tracks.push(track);
+        root.nested_sequences
+            .push(NestedSequence::new("sequence", "Scene", Timeline::new()));
+
+        assert_eq!(
+            root.validate_nested_sequences().unwrap_err(),
+            "invalid compound clip representation: compound"
+        );
+    }
+
     #[test]
     fn clip_location_fields() {
         let loc = ClipLocation::new(2, 5);
diff --git a/crates/opentake-domain/src/transition.rs b/crates/opentake-domain/src/transition.rs
new file mode 100644
index 00000000..9281121f
--- /dev/null
+++ b/crates/opentake-domain/src/transition.rs
@@ -0,0 +1,24 @@
+use serde::{Deserialize, Serialize};
+
+/// Visual transition applied at the cut from one clip to its exact adjacent
+/// successor. V1 intentionally starts with the lossless baseline required by
+/// the product plan; additional shader-backed kinds can extend this enum later.
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub enum TransitionKind {
+    #[default]
+    CrossDissolve,
+}
+
+#[derive(Clone, PartialEq, Eq, Debug, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Transition {
+    /// Both sides are persisted so a transition cannot silently rebind when a
+    /// project is reordered. Empty is accepted only for legacy project files;
+    /// the next validated edit normalizes it to the containing clip id.
+    #[serde(default, skip_serializing_if = "String::is_empty")]
+    pub from_clip_id: String,
+    pub to_clip_id: String,
+    pub kind: TransitionKind,
+    pub duration_frames: i32,
+}
diff --git a/crates/opentake-domain/tests/wire_schema.rs b/crates/opentake-domain/tests/wire_schema.rs
index cfbd0d9f..ca230836 100644
--- a/crates/opentake-domain/tests/wire_schema.rs
+++ b/crates/opentake-domain/tests/wire_schema.rs
@@ -1,8 +1,10 @@
 use std::collections::BTreeSet;
 
 use opentake_domain::{
-    AnimPair, ChromaKey, Clip, ClipType, ColorGrade, Crop, Effect, Fill, Interpolation, Keyframe,
-    KeyframeTrack, Mask, Rgba, Shadow, TextAlignment, TextStyle, Track, Transform,
+    AnimPair, AudioDenoise, CaptionTranslationInput, ChromaKey, Clip, ClipType, ColorGrade, Crop,
+    DenoiseMode, Effect, Fill, Interpolation, Keyframe, KeyframeTrack, LoudnessNormalization,
+    LutReference, Mask, Rgba, Shadow, StabilizationKeyframe, StabilizationTrack, TextAlignment,
+    TextStyle, Track, Transform, Transition, TransitionKind,
 };
 use serde::Serialize;
 
@@ -73,8 +75,16 @@ fn full_clip() -> Clip {
     };
     clip.link_group_id = Some("link".to_owned());
     clip.caption_group_id = Some("caption".to_owned());
+    clip.nested_sequence_id = Some("sequence".to_owned());
     clip.text_content = Some("text".to_owned());
     clip.text_style = Some(full_text_style());
+    clip.caption_translation_input = Some(CaptionTranslationInput {
+        source_text: "source".into(),
+        source_locale: "en-US".into(),
+        target_locale: "zh-CN".into(),
+        provider: "wire".into(),
+        model: "wire-v1".into(),
+    });
     clip.opacity_track = Some(KeyframeTrack::from_keyframes(vec![
         Keyframe::with_interpolation(0, 0.5, Interpolation::Linear),
     ]));
@@ -97,10 +107,50 @@ fn full_clip() -> Clip {
         },
     )]));
     clip.volume_track = Some(KeyframeTrack::from_keyframes(vec![Keyframe::new(0, 0.9)]));
+    clip.loudness_normalization = Some(LoudnessNormalization {
+        target_lufs: -16.0,
+        true_peak_ceiling_dbtp: -1.0,
+        input_integrated_lufs: -24.0,
+        input_true_peak_dbtp: -12.0,
+        gain_db: 8.0,
+        output_integrated_lufs: -16.0,
+        output_true_peak_dbtp: -2.0,
+    });
+    clip.audio_denoise = Some(AudioDenoise {
+        mode: DenoiseMode::Voice,
+        strength: 0.75,
+        preview_enabled: true,
+    });
     clip.color_grade = Some(ColorGrade::default());
+    clip.lut = Some(
+        LutReference::new("0123456789abcdef".repeat(4), "Wire schema LUT", 0.75)
+            .expect("wire LUT reference is valid"),
+    );
     clip.chroma_key = Some(ChromaKey::default());
     clip.masks = vec![Mask::default()];
     clip.effects = vec![Effect::new("wire").with_param("amount", 1.0)];
+    clip.stabilization = Some(StabilizationTrack {
+        model: "wire".to_owned(),
+        model_version: 1,
+        source_identity: "asset".to_owned(),
+        strength: 0.75,
+        crop_margin: 0.02,
+        keyframes: vec![
+            StabilizationKeyframe::default(),
+            StabilizationKeyframe {
+                frame: 1,
+                translation_x: 0.01,
+                translation_y: -0.01,
+                rotation_degrees: 0.5,
+            },
+        ],
+    });
+    clip.transition_out = Some(Transition {
+        from_clip_id: "clip".to_owned(),
+        to_clip_id: "next".to_owned(),
+        kind: TransitionKind::CrossDissolve,
+        duration_frames: 5,
+    });
     clip.reversed = true;
     clip
 }
diff --git a/crates/opentake-gen/src/job.rs b/crates/opentake-gen/src/job.rs
index b2747b3c..103ad8dd 100644
--- a/crates/opentake-gen/src/job.rs
+++ b/crates/opentake-gen/src/job.rs
@@ -113,7 +113,9 @@ mod tests {
         assert_eq!(job.id, "j1");
         assert_eq!(job.status, JobStatus::Running);
         assert_eq!(job.result_urls, None);
+        assert_eq!(job.error_message, None);
         assert_eq!(job.cost_credits, None);
+        assert_eq!(job.completed_at, None);
     }
 
     #[test]
diff --git a/crates/opentake-gen/src/lib.rs b/crates/opentake-gen/src/lib.rs
index f7b0cdef..a6bdd820 100644
--- a/crates/opentake-gen/src/lib.rs
+++ b/crates/opentake-gen/src/lib.rs
@@ -21,6 +21,7 @@ pub mod job;
 pub mod keys;
 pub mod params;
 pub mod provider;
+pub mod stems;
 pub mod transport;
 
 // Public API surface.
@@ -43,6 +44,7 @@ pub use provider::{
     content_type_for, ElevenLabsAdapter, FalAdapter, ModelRoute, OpenAiAdapter, ProviderAdapter,
     ProviderRegistry, ReplicateAdapter,
 };
+pub use stems::{resolve_stem_execution, StemExecutionPlan, StemProviderSelection};
 pub use transport::{
     Body, HttpRequest, HttpResponse, HttpTransport, Method, MockTransport, ReqwestTransport,
 };
diff --git a/crates/opentake-gen/src/stems.rs b/crates/opentake-gen/src/stems.rs
new file mode 100644
index 00000000..2dc9b996
--- /dev/null
+++ b/crates/opentake-gen/src/stems.rs
@@ -0,0 +1,144 @@
+//! Explicit routing policy for stem separation.
+//!
+//! Local execution never uploads media. Hosted execution is available only
+//! after the user selects a concrete provider/model, acknowledges upload, and
+//! the normal generation registry proves that provider is configured.
+
+use crate::{GenError, ModelRoute, ProviderRegistry};
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum StemProviderSelection {
+    Local,
+    Hosted {
+        provider: String,
+        model: String,
+        upload_confirmed: bool,
+    },
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum StemExecutionPlan {
+    Local,
+    Hosted {
+        provider: String,
+        model: String,
+        vendor_model: String,
+    },
+}
+
+pub fn resolve_stem_execution(
+    selection: StemProviderSelection,
+    registry: &ProviderRegistry,
+) -> Result<StemExecutionPlan, GenError> {
+    match selection {
+        StemProviderSelection::Local => Ok(StemExecutionPlan::Local),
+        StemProviderSelection::Hosted {
+            provider,
+            model,
+            upload_confirmed,
+        } => {
+            if provider.trim().is_empty() || model.trim().is_empty() {
+                return Err(GenError::Other(anyhow::anyhow!(
+                    "stem provider and model must be selected explicitly"
+                )));
+            }
+            if !upload_confirmed {
+                return Err(GenError::Other(anyhow::anyhow!(
+                    "stem upload requires explicit privacy confirmation"
+                )));
+            }
+            if !registry.has_prefix(&provider) {
+                return Err(GenError::NotConfigured);
+            }
+            let route = ModelRoute::parse(&model)?;
+            if route.prefix != provider {
+                return Err(GenError::Other(anyhow::anyhow!(
+                    "stem model prefix does not match selected provider"
+                )));
+            }
+            Ok(StemExecutionPlan::Hosted {
+                provider,
+                model,
+                vendor_model: route.vendor_model,
+            })
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use async_trait::async_trait;
+
+    use super::*;
+    use crate::{GenerationJob, GenerationParams, ProviderAdapter};
+
+    struct StemCapableProvider;
+
+    #[async_trait]
+    impl ProviderAdapter for StemCapableProvider {
+        fn prefix(&self) -> &'static str {
+            "stemhost"
+        }
+
+        async fn submit(
+            &self,
+            _route: &ModelRoute,
+            _params: &GenerationParams,
+        ) -> Result<GenerationJob, GenError> {
+            unreachable!("routing test does not submit")
+        }
+
+        async fn poll(&self, _job_id: &str) -> Result<GenerationJob, GenError> {
+            unreachable!("routing test does not poll")
+        }
+
+        async fn upload(
+            &self,
+            _path: &std::path::Path,
+            _content_type: &str,
+        ) -> Result<String, GenError> {
+            unreachable!("routing test does not upload")
+        }
+    }
+
+    #[test]
+    fn local_never_requires_a_provider() {
+        assert_eq!(
+            resolve_stem_execution(StemProviderSelection::Local, &ProviderRegistry::new()).unwrap(),
+            StemExecutionPlan::Local
+        );
+    }
+
+    #[test]
+    fn hosted_requires_confirmation_configuration_and_matching_prefix() {
+        let registry = ProviderRegistry::new().with(Arc::new(StemCapableProvider));
+        let unconfirmed = resolve_stem_execution(
+            StemProviderSelection::Hosted {
+                provider: "stemhost".into(),
+                model: "stemhost:separate-v1".into(),
+                upload_confirmed: false,
+            },
+            &registry,
+        );
+        assert!(unconfirmed.is_err());
+        let plan = resolve_stem_execution(
+            StemProviderSelection::Hosted {
+                provider: "stemhost".into(),
+                model: "stemhost:separate-v1".into(),
+                upload_confirmed: true,
+            },
+            &registry,
+        )
+        .unwrap();
+        assert_eq!(
+            plan,
+            StemExecutionPlan::Hosted {
+                provider: "stemhost".into(),
+                model: "stemhost:separate-v1".into(),
+                vendor_model: "separate-v1".into(),
+            }
+        );
+    }
+}
diff --git a/crates/opentake-media/Cargo.toml b/crates/opentake-media/Cargo.toml
index a7ba54bf..57a8d4a4 100644
--- a/crates/opentake-media/Cargo.toml
+++ b/crates/opentake-media/Cargo.toml
@@ -25,12 +25,14 @@ ndarray = "0.16"
 tracing = "0.1"
 unicode-normalization = "0.1"
 tempfile = "3"
+rustfft = "6"
 
 # Media IO. We drive the system ffmpeg/ffprobe over the CLI rather than linking
 # libav*: the local toolchain is ffmpeg 8.1 (libavcodec 62), which the C-binding
 # crates (ffmpeg-next / ffmpeg-the-third) do not support, and pkg-config is not
-# installed. ffmpeg-sidecar shells out to the binaries on PATH — zero native
-# linkage, and it never auto-downloads here (we only use its command/parse API).
+# installed. ffmpeg-sidecar shells out to OpenTake's checksum-pinned packaged
+# binaries (or PATH during development) — zero native linkage, and it never
+# auto-downloads here (we only use its command/parse API).
 # `default-features = false` drops the `download_ffmpeg` feature, whose ureq +
 # rustls + zip/tar/xz2 stack is the crate's only HTTP/TLS dependency and is dead
 # weight for us; the FfmpegCommand command/parse API lives in the always-on core.
@@ -69,10 +71,11 @@ default = []
 # Test-only cross-crate fault boundaries. Shipped builds do not expose these
 # hooks; integration tests opt in through a dev-dependency feature union.
 test-faults = []
-# Real SigLIP2 inference via ONNX Runtime. `download-binaries` lets ort fetch a
-# prebuilt onnxruntime *when this feature is explicitly enabled* — it is off by
-# default, so plain `cargo build`/`cargo test` never touch the network.
-ort-backend = ["dep:ort"]
+# Real SigLIP2 inference through ort. Windows uses ort's official pure-Rust
+# tract backend so the installed product does not depend on Server-only
+# DirectX/ONNX Runtime entry points. Other platforms keep the pinned native
+# ONNX Runtime backend. Both remain off in the default, fully-offline build.
+ort-backend = ["dep:ort", "dep:ort-tract"]
 # Real on-device transcription via whisper.cpp (compiles native C++ on enable).
 whisper-backend = ["dep:whisper-rs"]
 # Model weight download/verify/unzip (reqwest + zip + sha1). Off by default so
@@ -80,10 +83,20 @@ whisper-backend = ["dep:whisper-rs"]
 # ggml downloads against whisper.cpp's published SHA-1 checksums.
 model-download = ["dep:reqwest", "dep:zip", "dep:futures-util", "dep:sha1"]
 
-[dependencies.ort]
+[target.'cfg(not(windows))'.dependencies.ort]
 version = "=2.0.0-rc.10"
 default-features = false
-features = ["std", "ndarray", "download-binaries"]
+features = ["std", "ndarray", "download-binaries", "copy-dylibs"]
+optional = true
+
+[target.'cfg(windows)'.dependencies.ort]
+version = "=2.0.0-rc.10"
+default-features = false
+features = ["std", "ndarray", "alternative-backend"]
+optional = true
+
+[target.'cfg(windows)'.dependencies.ort-tract]
+version = "=0.1.0"
 optional = true
 
 [dependencies.whisper-rs]
diff --git a/crates/opentake-media/src/analysis/beat.rs b/crates/opentake-media/src/analysis/beat.rs
index 5ae1f97b..74e471df 100644
--- a/crates/opentake-media/src/analysis/beat.rs
+++ b/crates/opentake-media/src/analysis/beat.rs
@@ -28,6 +28,11 @@ pub struct BeatOnset {
     pub strength: f32,
 }
 
+// Normalized PCM below this onset-energy delta is treated as low-level speech,
+// room tone, or codec noise. Relative normalization alone would otherwise turn
+// an inaudible fluctuation into a full-strength "beat".
+const MIN_ABSOLUTE_ONSET_ENERGY_DELTA: f32 = 0.0001;
+
 pub fn detect_beats(samples: &[f32], config: BeatDetectionConfig) -> Vec<BeatOnset> {
     if samples.is_empty() || config.sample_rate == 0 || !config.fps.is_finite() || config.fps <= 0.0
     {
@@ -45,7 +50,7 @@ pub fn detect_beats(samples: &[f32], config: BeatDetectionConfig) -> Vec<BeatOns
         .windows(2)
         .map(|pair| (pair[1] - pair[0]).max(0.0))
         .fold(0.0f32, f32::max);
-    if peak_delta <= f32::EPSILON {
+    if peak_delta < MIN_ABSOLUTE_ONSET_ENERGY_DELTA {
         return Vec::new();
     }
 
@@ -120,4 +125,21 @@ mod tests {
             .expect("pulse should produce a beat on frame 5");
         assert!(beat.strength > 0.0);
     }
+
+    #[test]
+    fn low_energy_speech_is_not_overdetected() {
+        let samples = (0..1_000)
+            .map(|index| if (index / 100) % 2 == 0 { 0.005 } else { 0.006 })
+            .collect::<Vec<_>>();
+        let config = BeatDetectionConfig {
+            sample_rate: 1_000,
+            fps: 10.0,
+            window_size_samples: 100,
+            hop_size_samples: 100,
+            min_onset_strength: 0.05,
+            min_gap_frames: 1,
+        };
+
+        assert!(detect_beats(&samples, config).is_empty());
+    }
 }
diff --git a/crates/opentake-media/src/analysis/denoise.rs b/crates/opentake-media/src/analysis/denoise.rs
new file mode 100644
index 00000000..6a4cfed3
--- /dev/null
+++ b/crates/opentake-media/src/analysis/denoise.rs
@@ -0,0 +1,232 @@
+//! Deterministic local STFT noise suppression shared by preview and export.
+
+use std::sync::Arc;
+
+use opentake_domain::{AudioDenoise, DenoiseMode};
+use rustfft::{num_complex::Complex32, Fft, FftPlanner};
+
+use crate::MediaCancelToken;
+
+pub type DenoiseProgressCallback = Arc<dyn Fn(usize, usize) + Send + Sync>;
+
+#[derive(Debug, thiserror::Error, PartialEq, Eq)]
+pub enum DenoiseError {
+    #[error("denoise_invalid_config: {0}")]
+    InvalidConfig(String),
+    #[error("denoise_cancelled")]
+    Cancelled,
+}
+
+/// Process interleaved PCM without mutating the source. A zero-strength config
+/// is a bit-exact bypass. Each channel is transformed independently so stereo
+/// placement is preserved, while all call sites share identical parameters and
+/// math.
+pub fn denoise_interleaved(
+    samples: &[f32],
+    channels: usize,
+    sample_rate: u32,
+    config: AudioDenoise,
+    cancel: &MediaCancelToken,
+    progress: Option<DenoiseProgressCallback>,
+) -> Result<Vec<f32>, DenoiseError> {
+    config
+        .validate()
+        .map_err(|error| DenoiseError::InvalidConfig(error.to_string()))?;
+    if channels == 0
+        || channels > 8
+        || sample_rate < 8_000
+        || !samples.len().is_multiple_of(channels)
+    {
+        return Err(DenoiseError::InvalidConfig(
+            "channels, sample rate, or interleaving is unsupported".to_string(),
+        ));
+    }
+    if cancel.checkpoint() {
+        return Err(DenoiseError::Cancelled);
+    }
+    if samples.is_empty() || config.strength == 0.0 {
+        return Ok(samples.to_vec());
+    }
+
+    let frame_len = if sample_rate >= 32_000 { 1_024 } else { 512 };
+    let hop = frame_len / 4;
+    let audio_frames = samples.len() / channels;
+    let windows = if audio_frames <= frame_len {
+        1
+    } else {
+        1 + (audio_frames - 1) / hop
+    };
+    let total_steps = channels.saturating_mul(windows).saturating_mul(2).max(1);
+    let mut completed = 0usize;
+
+    let window = (0..frame_len)
+        .map(|index| {
+            let phase = std::f32::consts::TAU * index as f32 / frame_len as f32;
+            0.5 - 0.5 * phase.cos()
+        })
+        .collect::<Vec<_>>();
+    let mut planner = FftPlanner::<f32>::new();
+    let forward = planner.plan_fft_forward(frame_len);
+    let inverse = planner.plan_fft_inverse(frame_len);
+    let mut output = vec![0.0_f32; samples.len()];
+
+    for channel in 0..channels {
+        let mono = samples
+            .iter()
+            .skip(channel)
+            .step_by(channels)
+            .copied()
+            .collect::<Vec<_>>();
+        let processed = process_channel(
+            &mono,
+            &window,
+            hop,
+            windows,
+            config,
+            cancel,
+            &progress,
+            total_steps,
+            &mut completed,
+            &forward,
+            &inverse,
+        )?;
+        for (frame, value) in processed.into_iter().enumerate() {
+            output[frame * channels + channel] = value.clamp(-1.0, 1.0);
+        }
+    }
+
+    if let Some(report) = progress {
+        report(total_steps, total_steps);
+    }
+    Ok(output)
+}
+
+#[allow(clippy::too_many_arguments)]
+fn process_channel(
+    samples: &[f32],
+    window: &[f32],
+    hop: usize,
+    windows: usize,
+    config: AudioDenoise,
+    cancel: &MediaCancelToken,
+    progress: &Option<DenoiseProgressCallback>,
+    total_steps: usize,
+    completed: &mut usize,
+    forward: &Arc<dyn Fft<f32>>,
+    inverse: &Arc<dyn Fft<f32>>,
+) -> Result<Vec<f32>, DenoiseError> {
+    let frame_len = window.len();
+    let bins = frame_len / 2 + 1;
+    const MAX_NOISE_ESTIMATE_WINDOWS: usize = 512;
+    let estimate_stride = windows.div_ceil(MAX_NOISE_ESTIMATE_WINDOWS).max(1);
+    let mut powers = (0..bins)
+        .map(|_| Vec::with_capacity(windows.min(MAX_NOISE_ESTIMATE_WINDOWS)))
+        .collect::<Vec<_>>();
+    let mut spectrum = vec![Complex32::new(0.0, 0.0); frame_len];
+
+    for frame_index in 0..windows {
+        if cancel.checkpoint() {
+            return Err(DenoiseError::Cancelled);
+        }
+        load_window(samples, window, frame_index * hop, &mut spectrum);
+        forward.process(&mut spectrum);
+        if frame_index.is_multiple_of(estimate_stride) {
+            for bin in 0..bins {
+                powers[bin].push(spectrum[bin].norm_sqr());
+            }
+        }
+        report_step(progress, total_steps, completed);
+    }
+
+    let noise_power = powers
+        .into_iter()
+        .map(|mut values| {
+            values.sort_by(f32::total_cmp);
+            let index = ((values.len().saturating_sub(1)) as f32 * 0.15).round() as usize;
+            values[index].max(1.0e-12)
+        })
+        .collect::<Vec<_>>();
+    let strength = config.strength as f32;
+    let oversubtraction = match config.mode {
+        DenoiseMode::Adaptive => 1.0 + 4.5 * strength,
+        DenoiseMode::Voice => 1.0 + 6.0 * strength,
+    };
+    let floor_gain = 1.0 - 0.92 * strength;
+    let mut prior_gain = vec![1.0_f32; bins];
+    let mut raw_gain = vec![1.0_f32; bins];
+    let mut out = vec![0.0_f32; samples.len()];
+    let mut norm = vec![0.0_f32; samples.len()];
+
+    for frame_index in 0..windows {
+        if cancel.checkpoint() {
+            return Err(DenoiseError::Cancelled);
+        }
+        let start = frame_index * hop;
+        load_window(samples, window, start, &mut spectrum);
+        forward.process(&mut spectrum);
+        for bin in 0..bins {
+            let power = spectrum[bin].norm_sqr().max(1.0e-12);
+            let clean_ratio = (1.0 - oversubtraction * noise_power[bin] / power).max(0.0);
+            raw_gain[bin] = clean_ratio.sqrt().max(floor_gain);
+        }
+        for bin in 0..bins {
+            let lo = bin.saturating_sub(1);
+            let hi = (bin + 1).min(bins - 1);
+            let frequency_smoothed = raw_gain[lo..=hi].iter().sum::<f32>() / (hi - lo + 1) as f32;
+            let gain = (prior_gain[bin] * 0.25 + frequency_smoothed * 0.75).clamp(floor_gain, 1.0);
+            prior_gain[bin] = gain;
+            spectrum[bin] *= gain;
+            if bin > 0 && bin < frame_len / 2 {
+                spectrum[frame_len - bin] *= gain;
+            }
+        }
+        inverse.process(&mut spectrum);
+        for index in 0..frame_len {
+            let output_index = start + index;
+            if output_index >= out.len() {
+                break;
+            }
+            let weight = window[index];
+            out[output_index] += spectrum[index].re / frame_len as f32 * weight;
+            norm[output_index] += weight * weight;
+        }
+        report_step(progress, total_steps, completed);
+    }
+
+    let input_peak = samples
+        .iter()
+        .map(|sample| sample.abs())
+        .fold(0.0_f32, f32::max)
+        .min(1.0);
+    let edge_span = (frame_len / 2).min(samples.len().saturating_sub(1)).max(1);
+    for (index, (value, weight)) in out.iter_mut().zip(norm).enumerate() {
+        let normalized = if weight > 1.0e-6 {
+            *value / weight
+        } else {
+            samples[index]
+        };
+        // A centered STFT would normally pad both ends before analysis. Keep
+        // the implementation allocation-bounded by crossfading the unpadded
+        // edge into the processed signal instead. The peak guard prevents
+        // low Hann-normalization weights from creating a click or a new peak.
+        let edge_distance = index.min(samples.len() - 1 - index);
+        let processed_mix = (edge_distance as f32 / edge_span as f32).min(1.0);
+        *value = (samples[index] * (1.0 - processed_mix) + normalized * processed_mix)
+            .clamp(-input_peak, input_peak);
+    }
+    Ok(out)
+}
+
+fn load_window(samples: &[f32], window: &[f32], start: usize, target: &mut [Complex32]) {
+    for (index, complex) in target.iter_mut().enumerate() {
+        let value = samples.get(start + index).copied().unwrap_or(0.0);
+        *complex = Complex32::new(value * window[index], 0.0);
+    }
+}
+
+fn report_step(progress: &Option<DenoiseProgressCallback>, total: usize, completed: &mut usize) {
+    *completed = completed.saturating_add(1);
+    if let Some(report) = progress {
+        report((*completed).min(total), total);
+    }
+}
diff --git a/crates/opentake-media/src/analysis/loudness.rs b/crates/opentake-media/src/analysis/loudness.rs
new file mode 100644
index 00000000..e5a022ea
--- /dev/null
+++ b/crates/opentake-media/src/analysis/loudness.rs
@@ -0,0 +1,384 @@
+//! Deterministic EBU R128 / ITU-R BS.1770 loudness analysis for mono PCM.
+//!
+//! OpenTake decodes clip windows to 48 kHz mono before analysis. The same
+//! computed gain is persisted on the clip and consumed by preview and export;
+//! analysis is never repeated during playback or rendering.
+
+use std::sync::Arc;
+
+use thiserror::Error;
+
+use crate::MediaCancelToken;
+
+const ABSOLUTE_GATE_LUFS: f64 = -70.0;
+const RELATIVE_GATE_LU: f64 = -10.0;
+const LOUDNESS_OFFSET: f64 = -0.691;
+const BLOCK_MILLIS: u64 = 400;
+const BLOCK_STEP_MILLIS: u64 = 100;
+const SILENCE_EPSILON: f64 = 1.0e-12;
+
+pub type LoudnessProgressCallback = Arc<dyn Fn(usize, usize) + Send + Sync>;
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct LoudnessNormalizationConfig {
+    pub target_lufs: f64,
+    pub true_peak_ceiling_dbtp: f64,
+}
+
+impl Default for LoudnessNormalizationConfig {
+    fn default() -> Self {
+        Self {
+            target_lufs: -16.0,
+            true_peak_ceiling_dbtp: -1.0,
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct LoudnessAnalysis {
+    pub input_integrated_lufs: f64,
+    pub input_true_peak_dbtp: f64,
+    pub target_lufs: f64,
+    pub true_peak_ceiling_dbtp: f64,
+    pub gain_db: f64,
+    pub output_integrated_lufs: f64,
+    pub output_true_peak_dbtp: f64,
+}
+
+#[derive(Clone, Debug, Error, PartialEq)]
+pub enum LoudnessError {
+    #[error("loudness_invalid_config: target LUFS and true-peak ceiling must be finite, with ceiling <= 0 dBTP")]
+    InvalidConfig,
+    #[error("loudness_unreadable_audio: sample rate must be positive and PCM must contain finite samples")]
+    UnreadableAudio,
+    #[error("loudness_silent_audio: no block passed the EBU R128 absolute gate")]
+    SilentAudio,
+    #[error("loudness_target_unreachable: the requested target cannot be reached under the true-peak ceiling")]
+    TargetUnreachable,
+    #[error("loudness_cancelled")]
+    Cancelled,
+}
+
+#[derive(Clone, Copy)]
+struct Biquad {
+    b0: f64,
+    b1: f64,
+    b2: f64,
+    a1: f64,
+    a2: f64,
+    x1: f64,
+    x2: f64,
+    y1: f64,
+    y2: f64,
+}
+
+impl Biquad {
+    fn process(&mut self, input: f64) -> f64 {
+        let output = self.b0 * input + self.b1 * self.x1 + self.b2 * self.x2
+            - self.a1 * self.y1
+            - self.a2 * self.y2;
+        self.x2 = self.x1;
+        self.x1 = input;
+        self.y2 = self.y1;
+        self.y1 = output;
+        output
+    }
+}
+
+/// Analyze mono PCM with EBU R128 gating and a 4x inter-sample peak estimate.
+pub fn analyze_loudness(
+    samples: &[f32],
+    sample_rate: u32,
+    config: LoudnessNormalizationConfig,
+) -> Result<LoudnessAnalysis, LoudnessError> {
+    analyze_loudness_with_progress(samples, sample_rate, config, &MediaCancelToken::new(), None)
+}
+
+pub fn analyze_loudness_with_progress(
+    samples: &[f32],
+    sample_rate: u32,
+    config: LoudnessNormalizationConfig,
+    cancel: &MediaCancelToken,
+    progress: Option<LoudnessProgressCallback>,
+) -> Result<LoudnessAnalysis, LoudnessError> {
+    validate(samples, sample_rate, config)?;
+    if cancel.checkpoint() {
+        return Err(LoudnessError::Cancelled);
+    }
+
+    let input_integrated_lufs =
+        integrated_loudness(samples, sample_rate, cancel, progress.as_deref())?;
+    let input_true_peak_dbtp = true_peak_dbtp(samples);
+    if !input_integrated_lufs.is_finite() || !input_true_peak_dbtp.is_finite() {
+        return Err(LoudnessError::SilentAudio);
+    }
+
+    // Compensate for the shared ceiling stage instead of sacrificing program
+    // loudness on high-crest-factor speech. Three correction passes converge
+    // the exact persisted gain against the same hard ceiling preview/export
+    // use, while remaining deterministic and bounded.
+    let mut gain_db = (config.target_lufs - input_integrated_lufs).clamp(-120.0, 60.0);
+    let mut output_integrated_lufs = input_integrated_lufs;
+    let mut output_true_peak_dbtp = input_true_peak_dbtp;
+    for _ in 0..4 {
+        if cancel.checkpoint() {
+            return Err(LoudnessError::Cancelled);
+        }
+        let mut normalized = apply_loudness_gain(samples, gain_db);
+        crate::encode::mix::apply_true_peak_ceiling(
+            &mut normalized,
+            Some(config.true_peak_ceiling_dbtp),
+        );
+        output_integrated_lufs = integrated_loudness(&normalized, sample_rate, cancel, None)?;
+        output_true_peak_dbtp = true_peak_dbtp(&normalized);
+        let correction = config.target_lufs - output_integrated_lufs;
+        if correction.abs() <= 0.05 {
+            break;
+        }
+        gain_db = (gain_db + correction).clamp(-120.0, 60.0);
+    }
+    if (output_integrated_lufs - config.target_lufs).abs() > 1.0 {
+        return Err(LoudnessError::TargetUnreachable);
+    }
+    if let Some(report) = &progress {
+        report(samples.len(), samples.len());
+    }
+    Ok(LoudnessAnalysis {
+        input_integrated_lufs,
+        input_true_peak_dbtp,
+        target_lufs: config.target_lufs,
+        true_peak_ceiling_dbtp: config.true_peak_ceiling_dbtp,
+        gain_db,
+        output_integrated_lufs,
+        output_true_peak_dbtp,
+    })
+}
+
+fn integrated_loudness(
+    samples: &[f32],
+    sample_rate: u32,
+    cancel: &MediaCancelToken,
+    progress: Option<&(dyn Fn(usize, usize) + Send + Sync)>,
+) -> Result<f64, LoudnessError> {
+    let weighted = k_weight(samples, sample_rate, cancel, progress)?;
+    let block_len =
+        (((u64::from(sample_rate) * BLOCK_MILLIS) / 1_000) as usize).min(weighted.len());
+    let block_step =
+        (((u64::from(sample_rate) * BLOCK_STEP_MILLIS) / 1_000) as usize).min(weighted.len());
+    if block_len == 0 || block_step == 0 {
+        return Err(LoudnessError::SilentAudio);
+    }
+
+    let mut block_powers = Vec::with_capacity((weighted.len() - block_len) / block_step + 1);
+    let block_count = (weighted.len() - block_len) / block_step + 1;
+    for (block_index, start) in (0..=weighted.len() - block_len)
+        .step_by(block_step)
+        .enumerate()
+    {
+        if block_index.is_multiple_of(32) {
+            if cancel.checkpoint() {
+                return Err(LoudnessError::Cancelled);
+            }
+            if let Some(report) = progress {
+                report(weighted.len() + block_index, weighted.len() + block_count);
+            }
+        }
+        let power = weighted[start..start + block_len]
+            .iter()
+            .map(|sample| sample * sample)
+            .sum::<f64>()
+            / block_len as f64;
+        if power_to_lufs(power) >= ABSOLUTE_GATE_LUFS {
+            block_powers.push(power);
+        }
+    }
+    if block_powers.is_empty() {
+        return Err(LoudnessError::SilentAudio);
+    }
+
+    let absolute_mean = mean(&block_powers);
+    let relative_gate = power_to_lufs(absolute_mean) + RELATIVE_GATE_LU;
+    let relative_powers = block_powers
+        .iter()
+        .copied()
+        .filter(|power| power_to_lufs(*power) >= relative_gate)
+        .collect::<Vec<_>>();
+    if relative_powers.is_empty() {
+        return Err(LoudnessError::SilentAudio);
+    }
+    let integrated = power_to_lufs(mean(&relative_powers));
+    if let Some(report) = progress {
+        let total = weighted.len() + block_count;
+        report(total, total);
+    }
+    Ok(integrated)
+}
+
+pub fn apply_loudness_gain(samples: &[f32], gain_db: f64) -> Vec<f32> {
+    let gain_db = if gain_db.is_finite() {
+        gain_db.clamp(-120.0, 60.0)
+    } else {
+        0.0
+    };
+    let gain = 10.0_f64.powf(gain_db / 20.0) as f32;
+    samples.iter().map(|sample| *sample * gain).collect()
+}
+
+fn validate(
+    samples: &[f32],
+    sample_rate: u32,
+    config: LoudnessNormalizationConfig,
+) -> Result<(), LoudnessError> {
+    if !config.target_lufs.is_finite()
+        || !config.true_peak_ceiling_dbtp.is_finite()
+        || config.true_peak_ceiling_dbtp > 0.0
+        || !(-70.0..=0.0).contains(&config.target_lufs)
+        || !(-20.0..=0.0).contains(&config.true_peak_ceiling_dbtp)
+    {
+        return Err(LoudnessError::InvalidConfig);
+    }
+    if sample_rate == 0 || samples.is_empty() || samples.iter().any(|sample| !sample.is_finite()) {
+        return Err(LoudnessError::UnreadableAudio);
+    }
+    Ok(())
+}
+
+fn k_weight(
+    samples: &[f32],
+    sample_rate: u32,
+    cancel: &MediaCancelToken,
+    progress: Option<&(dyn Fn(usize, usize) + Send + Sync)>,
+) -> Result<Vec<f64>, LoudnessError> {
+    let mut shelf = shelf_filter(sample_rate as f64);
+    let mut high_pass = high_pass_filter(sample_rate as f64);
+    let mut output = Vec::with_capacity(samples.len());
+    for (index, sample) in samples.iter().enumerate() {
+        if index.is_multiple_of(16_384) {
+            if cancel.checkpoint() {
+                return Err(LoudnessError::Cancelled);
+            }
+            if let Some(report) = progress {
+                report(index, samples.len());
+            }
+        }
+        output.push(high_pass.process(shelf.process(f64::from(*sample))));
+    }
+    Ok(output)
+}
+
+// Coefficients are generated from the analog transfer functions in ITU-R
+// BS.1770, allowing analysis at device rates other than 48 kHz.
+fn shelf_filter(sample_rate: f64) -> Biquad {
+    let f0 = 1_681.974_450_955_533;
+    let gain_db = 3.999_843_853_973_347;
+    let q = 0.707_175_236_955_419_6;
+    let k = (std::f64::consts::PI * f0 / sample_rate).tan();
+    let vh = 10.0_f64.powf(gain_db / 20.0);
+    let vb = vh.powf(0.499_666_774_154_541_6);
+    let a0 = 1.0 + k / q + k * k;
+    Biquad {
+        b0: (vh + vb * k / q + k * k) / a0,
+        b1: 2.0 * (k * k - vh) / a0,
+        b2: (vh - vb * k / q + k * k) / a0,
+        a1: 2.0 * (k * k - 1.0) / a0,
+        a2: (1.0 - k / q + k * k) / a0,
+        x1: 0.0,
+        x2: 0.0,
+        y1: 0.0,
+        y2: 0.0,
+    }
+}
+
+fn high_pass_filter(sample_rate: f64) -> Biquad {
+    let f0 = 38.135_470_876_024_44;
+    let q = 0.500_327_037_323_877_3;
+    let k = (std::f64::consts::PI * f0 / sample_rate).tan();
+    let a0 = 1.0 + k / q + k * k;
+    Biquad {
+        b0: 1.0 / a0,
+        b1: -2.0 / a0,
+        b2: 1.0 / a0,
+        a1: 2.0 * (k * k - 1.0) / a0,
+        a2: (1.0 - k / q + k * k) / a0,
+        x1: 0.0,
+        x2: 0.0,
+        y1: 0.0,
+        y2: 0.0,
+    }
+}
+
+fn true_peak_dbtp(samples: &[f32]) -> f64 {
+    let mut peak = samples
+        .iter()
+        .map(|sample| f64::from(sample.abs()))
+        .fold(0.0_f64, f64::max);
+    // Four-times cubic interpolation catches inter-sample peaks without adding
+    // a heavyweight DSP dependency. End points are extended constantly.
+    for index in 0..samples.len().saturating_sub(1) {
+        let p0 = f64::from(samples[index.saturating_sub(1)]);
+        let p1 = f64::from(samples[index]);
+        let p2 = f64::from(samples[index + 1]);
+        let p3 = f64::from(samples[(index + 2).min(samples.len() - 1)]);
+        for phase in 1..4 {
+            let t = phase as f64 / 4.0;
+            let t2 = t * t;
+            let t3 = t2 * t;
+            let value = 0.5
+                * ((2.0 * p1)
+                    + (-p0 + p2) * t
+                    + (2.0 * p0 - 5.0 * p1 + 4.0 * p2 - p3) * t2
+                    + (-p0 + 3.0 * p1 - 3.0 * p2 + p3) * t3);
+            peak = peak.max(value.abs());
+        }
+    }
+    20.0 * peak.max(SILENCE_EPSILON).log10()
+}
+
+fn mean(values: &[f64]) -> f64 {
+    values.iter().sum::<f64>() / values.len() as f64
+}
+
+fn power_to_lufs(power: f64) -> f64 {
+    LOUDNESS_OFFSET + 10.0 * power.max(SILENCE_EPSILON).log10()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn silence_is_a_typed_error() {
+        let error = analyze_loudness(
+            &vec![0.0; 48_000],
+            48_000,
+            LoudnessNormalizationConfig::default(),
+        )
+        .unwrap_err();
+        assert_eq!(error, LoudnessError::SilentAudio);
+    }
+
+    #[test]
+    fn pre_cancelled_analysis_stops_before_work() {
+        let cancel = MediaCancelToken::new();
+        cancel.cancel();
+        let error = analyze_loudness_with_progress(
+            &vec![0.1; 48_000],
+            48_000,
+            LoudnessNormalizationConfig::default(),
+            &cancel,
+            None,
+        )
+        .unwrap_err();
+        assert_eq!(error, LoudnessError::Cancelled);
+    }
+
+    #[test]
+    fn audible_clip_shorter_than_one_r128_block_is_supported() {
+        let samples = (0..4_800)
+            .map(|index| (index as f32 * 440.0 * std::f32::consts::TAU / 48_000.0).sin() * 0.1)
+            .collect::<Vec<_>>();
+        let analysis = analyze_loudness(&samples, 48_000, LoudnessNormalizationConfig::default())
+            .expect("short audible clip");
+        assert!(analysis.input_integrated_lufs.is_finite());
+    }
+}
diff --git a/crates/opentake-media/src/analysis/matting.rs b/crates/opentake-media/src/analysis/matting.rs
new file mode 100644
index 00000000..226d0c2c
--- /dev/null
+++ b/crates/opentake-media/src/analysis/matting.rs
@@ -0,0 +1,367 @@
+//! Verified local Robust Video Matting (RVM) model and frame inference.
+
+use std::fs::File;
+use std::io::Read;
+use std::path::{Path, PathBuf};
+#[cfg(feature = "model-download")]
+use std::sync::Arc;
+
+use sha2::{Digest, Sha256};
+
+#[cfg(any(feature = "ort-backend", feature = "model-download"))]
+use crate::MediaCancelToken;
+#[cfg(feature = "ort-backend")]
+use crate::RgbaFrame;
+use crate::{MediaError, Result};
+
+pub const RVM_MODEL_ID: &str = "rvm-mobilenetv3-fp32-v1.0.0";
+pub const RVM_MODEL_FILE: &str = "rvm_mobilenetv3_fp32.onnx";
+pub const RVM_MODEL_SHA256: &str =
+    "88d4531297118f595bf2fd60f6f566aec2e559393802d1f436c380f0cbbd2828";
+pub const RVM_MODEL_BYTES: u64 = 14_975_696;
+pub const RVM_MODEL_URL: &str = "https://github.com/PeterL1n/RobustVideoMatting/releases/download/v1.0.0/rvm_mobilenetv3_fp32.onnx";
+
+#[cfg(feature = "model-download")]
+pub type MattingDownloadProgress = Arc<dyn Fn(u64, u64) + Send + Sync>;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct InstalledMattingModel {
+    pub id: String,
+    pub path: PathBuf,
+    pub sha256: String,
+    pub bytes: u64,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct AlphaMatteFrame {
+    pub width: u32,
+    pub height: u32,
+    pub alpha: Vec<u8>,
+    /// Model-cleaned straight foreground RGB, three bytes per pixel.
+    pub foreground_rgb: Vec<u8>,
+}
+
+pub fn matting_model_path(model_dir: &Path) -> PathBuf {
+    model_dir.join("matting").join(RVM_MODEL_FILE)
+}
+
+pub fn verify_rvm_model(model_dir: &Path) -> Result<InstalledMattingModel> {
+    let path = matting_model_path(model_dir);
+    let metadata = std::fs::symlink_metadata(&path).map_err(|error| {
+        MediaError::ModelInstall(format!("matting_model_not_installed:{error}"))
+    })?;
+    if !metadata.is_file() || metadata.file_type().is_symlink() {
+        return Err(MediaError::ModelInstall(
+            "matting_model_must_be_a_regular_file".to_string(),
+        ));
+    }
+    if metadata.len() != RVM_MODEL_BYTES {
+        return Err(MediaError::Checksum(format!(
+            "matting_model_size_mismatch: expected {RVM_MODEL_BYTES}, got {}",
+            metadata.len()
+        )));
+    }
+    let mut file = File::open(&path)?;
+    let mut digest = Sha256::new();
+    let mut buffer = [0_u8; 64 * 1024];
+    loop {
+        let read = file.read(&mut buffer)?;
+        if read == 0 {
+            break;
+        }
+        digest.update(&buffer[..read]);
+    }
+    let actual = format!("{:x}", digest.finalize());
+    if actual != RVM_MODEL_SHA256 {
+        return Err(MediaError::Checksum(format!(
+            "matting_model_integrity_failed: expected {RVM_MODEL_SHA256}, got {actual}"
+        )));
+    }
+    Ok(InstalledMattingModel {
+        id: RVM_MODEL_ID.to_string(),
+        path,
+        sha256: actual,
+        bytes: metadata.len(),
+    })
+}
+
+#[cfg(feature = "model-download")]
+pub async fn download_rvm_model(
+    model_dir: &Path,
+    cancel: &MediaCancelToken,
+    progress: Option<MattingDownloadProgress>,
+) -> Result<InstalledMattingModel> {
+    use std::io::Write;
+
+    use futures_util::StreamExt;
+
+    if cancel.checkpoint() {
+        return Err(MediaError::Cancelled);
+    }
+    let destination = matting_model_path(model_dir);
+    if destination.exists() {
+        return verify_rvm_model(model_dir);
+    }
+    let parent = destination
+        .parent()
+        .ok_or_else(|| MediaError::ModelInstall("matting_model_path_invalid".to_string()))?;
+    std::fs::create_dir_all(parent)?;
+    let parent_metadata = std::fs::symlink_metadata(parent)?;
+    if !parent_metadata.is_dir() || parent_metadata.file_type().is_symlink() {
+        return Err(MediaError::ModelInstall(
+            "matting_model_directory_must_be_regular".to_string(),
+        ));
+    }
+    let install = async {
+        let response = reqwest::Client::new()
+            .get(RVM_MODEL_URL)
+            .send()
+            .await
+            .map_err(|error| MediaError::ModelInstall(format!("matting_model_download:{error}")))?
+            .error_for_status()
+            .map_err(|error| MediaError::ModelInstall(format!("matting_model_download:{error}")))?;
+        if response
+            .content_length()
+            .is_some_and(|bytes| bytes != RVM_MODEL_BYTES)
+        {
+            return Err(MediaError::Checksum(
+                "matting_model_content_length_mismatch".to_string(),
+            ));
+        }
+        let mut partial = tempfile::Builder::new()
+            .prefix(".rvm-model-")
+            .suffix(".partial")
+            .tempfile_in(parent)
+            .map_err(|error| {
+                MediaError::ModelInstall(format!("matting_model_partial_create:{error}"))
+            })?;
+        let mut digest = Sha256::new();
+        let mut downloaded = 0_u64;
+        let mut stream = response.bytes_stream();
+        while let Some(chunk) = stream.next().await {
+            if cancel.checkpoint() {
+                return Err(MediaError::Cancelled);
+            }
+            let chunk = chunk.map_err(|error| {
+                MediaError::ModelInstall(format!("matting_model_download:{error}"))
+            })?;
+            downloaded = downloaded
+                .checked_add(chunk.len() as u64)
+                .ok_or_else(|| MediaError::ModelInstall("matting_model_too_large".to_string()))?;
+            if downloaded > RVM_MODEL_BYTES {
+                return Err(MediaError::Checksum(
+                    "matting_model_download_exceeds_manifest".to_string(),
+                ));
+            }
+            digest.update(&chunk);
+            partial.as_file_mut().write_all(&chunk)?;
+            if let Some(progress) = &progress {
+                progress(downloaded, RVM_MODEL_BYTES);
+            }
+        }
+        partial.as_file().sync_all()?;
+        if downloaded != RVM_MODEL_BYTES {
+            return Err(MediaError::Checksum(format!(
+                "matting_model_size_mismatch: expected {RVM_MODEL_BYTES}, got {downloaded}"
+            )));
+        }
+        let actual = format!("{:x}", digest.finalize());
+        if actual != RVM_MODEL_SHA256 {
+            return Err(MediaError::Checksum(format!(
+                "matting_model_integrity_failed: expected {RVM_MODEL_SHA256}, got {actual}"
+            )));
+        }
+        partial.persist_noclobber(&destination).map_err(|error| {
+            MediaError::ModelInstall(format!("matting_model_publish:{}", error.error))
+        })?;
+        Ok(())
+    }
+    .await;
+    install?;
+    verify_rvm_model(model_dir)
+}
+
+#[cfg(feature = "ort-backend")]
+pub struct RvmMattingSession {
+    model: crate::ort_worker::OrtModel,
+    recurrent: [ndarray::ArrayD<f32>; 4],
+    pub installed: InstalledMattingModel,
+}
+
+#[cfg(feature = "ort-backend")]
+impl RvmMattingSession {
+    pub fn load(model_dir: &Path) -> Result<Self> {
+        use ndarray::{ArrayD, IxDyn};
+
+        let installed = verify_rvm_model(model_dir)?;
+        let model = crate::ort_worker::OrtModel::load(
+            &installed.path,
+            crate::ort_worker::ExecutionProvider::platform_default(),
+        )?;
+        let (inputs, outputs) = model.io_contract();
+        let input_names = inputs
+            .iter()
+            .map(|(name, _)| name.as_str())
+            .collect::<Vec<_>>();
+        let output_names = outputs
+            .iter()
+            .map(|(name, _)| name.as_str())
+            .collect::<Vec<_>>();
+        if input_names != ["src", "r1i", "r2i", "r3i", "r4i", "downsample_ratio"]
+            || output_names != ["fgr", "pha", "r1o", "r2o", "r3o", "r4o"]
+        {
+            return Err(MediaError::ModelInstall(
+                "matting_model_io_contract_mismatch".to_string(),
+            ));
+        }
+        let empty = || ArrayD::zeros(IxDyn(&[1, 1, 1, 1]));
+        Ok(Self {
+            model,
+            recurrent: [empty(), empty(), empty(), empty()],
+            installed,
+        })
+    }
+
+    pub fn reset_temporal_state(&mut self) {
+        use ndarray::{ArrayD, IxDyn};
+        self.recurrent = std::array::from_fn(|_| ArrayD::zeros(IxDyn(&[1, 1, 1, 1])));
+    }
+
+    pub fn infer(
+        &mut self,
+        frame: &RgbaFrame,
+        cancel: &MediaCancelToken,
+    ) -> Result<AlphaMatteFrame> {
+        use ndarray::{ArrayD, IxDyn};
+
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        let width = frame.width as usize;
+        let height = frame.height as usize;
+        let mut src = vec![0.0_f32; 3 * width * height];
+        for (index, pixel) in frame.rgba.chunks_exact(4).enumerate() {
+            src[index] = pixel[0] as f32 / 255.0;
+            src[width * height + index] = pixel[1] as f32 / 255.0;
+            src[2 * width * height + index] = pixel[2] as f32 / 255.0;
+        }
+        let src = ArrayD::from_shape_vec(IxDyn(&[1, 3, height, width]), src)
+            .map_err(|error| MediaError::Decode(format!("matting_input_shape:{error}")))?;
+        let mut outputs = self.model.run_f32(vec![
+            ("src".to_string(), src),
+            ("r1i".to_string(), self.recurrent[0].clone()),
+            ("r2i".to_string(), self.recurrent[1].clone()),
+            ("r3i".to_string(), self.recurrent[2].clone()),
+            ("r4i".to_string(), self.recurrent[3].clone()),
+            (
+                "downsample_ratio".to_string(),
+                ArrayD::from_shape_vec(IxDyn(&[1]), vec![0.25]).expect("fixed ratio shape"),
+            ),
+        ])?;
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        for (index, name) in ["r1o", "r2o", "r3o", "r4o"].into_iter().enumerate() {
+            self.recurrent[index] = outputs.remove(name).ok_or_else(|| {
+                MediaError::Decode(format!("matting_model_missing_output:{name}"))
+            })?;
+        }
+        let foreground = outputs
+            .remove("fgr")
+            .ok_or_else(|| MediaError::Decode("matting_model_missing_output:fgr".to_string()))?;
+        if foreground.shape() != [1, 3, height, width] {
+            return Err(MediaError::Decode(format!(
+                "matting_foreground_shape_mismatch:{:?}",
+                foreground.shape()
+            )));
+        }
+        let foreground = foreground
+            .as_slice()
+            .ok_or_else(|| MediaError::Decode("matting_foreground_not_contiguous".to_string()))?;
+        let alpha = outputs
+            .remove("pha")
+            .ok_or_else(|| MediaError::Decode("matting_model_missing_output:pha".to_string()))?;
+        if alpha.shape() != [1, 1, height, width] {
+            return Err(MediaError::Decode(format!(
+                "matting_alpha_shape_mismatch:{:?}",
+                alpha.shape()
+            )));
+        }
+        let alpha = alpha
+            .iter()
+            .map(|value| (value.clamp(0.0, 1.0) * 255.0).round() as u8)
+            .collect();
+        let plane = width * height;
+        let foreground_rgb = (0..plane)
+            .flat_map(|index| {
+                [
+                    foreground[index],
+                    foreground[plane + index],
+                    foreground[2 * plane + index],
+                ]
+                .map(|value| (value.clamp(0.0, 1.0) * 255.0).round() as u8)
+            })
+            .collect();
+        Ok(AlphaMatteFrame {
+            width: frame.width,
+            height: frame.height,
+            alpha,
+            foreground_rgb,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn missing_model_is_a_typed_install_error() {
+        let root = tempfile::tempdir().unwrap();
+        let error = verify_rvm_model(root.path()).expect_err("model must be absent");
+        assert!(matches!(error, MediaError::ModelInstall(_)));
+        assert!(error.to_string().contains("matting_model_not_installed"));
+    }
+
+    #[cfg(feature = "model-download")]
+    #[test]
+    fn pre_cancelled_download_never_creates_a_partial_model() {
+        use futures_util::FutureExt;
+
+        let root = tempfile::tempdir().unwrap();
+        let cancel = MediaCancelToken::new();
+        cancel.cancel();
+        let error = download_rvm_model(root.path(), &cancel, None)
+            .now_or_never()
+            .expect("pre-cancelled install completes without polling the network")
+            .expect_err("pre-cancelled install must fail before network access");
+        assert!(matches!(error, MediaError::Cancelled));
+        assert!(!matting_model_path(root.path()).exists());
+    }
+
+    #[cfg(feature = "ort-backend")]
+    #[test]
+    fn official_rvm_model_returns_frame_aligned_alpha() {
+        let Some(source) = std::env::var_os("OPENTAKE_TEST_RVM_MODEL") else {
+            return;
+        };
+        let root = tempfile::tempdir().unwrap();
+        let destination = matting_model_path(root.path());
+        std::fs::create_dir_all(destination.parent().unwrap()).unwrap();
+        std::fs::copy(source, destination).unwrap();
+        let mut session = RvmMattingSession::load(root.path()).expect("load verified RVM");
+        let mut frame = RgbaFrame::black(64, 64);
+        for y in 8..56 {
+            for x in 16..48 {
+                let index = ((y * 64 + x) * 4) as usize;
+                frame.rgba[index..index + 4].copy_from_slice(&[210, 160, 130, 255]);
+            }
+        }
+        let matte = session
+            .infer(&frame, &MediaCancelToken::new())
+            .expect("infer alpha");
+        assert_eq!((matte.width, matte.height), (64, 64));
+        assert_eq!(matte.alpha.len(), 64 * 64);
+        assert_eq!(matte.foreground_rgb.len(), 64 * 64 * 3);
+    }
+}
diff --git a/crates/opentake-media/src/analysis/mod.rs b/crates/opentake-media/src/analysis/mod.rs
index dce2342b..76d57ae9 100644
--- a/crates/opentake-media/src/analysis/mod.rs
+++ b/crates/opentake-media/src/analysis/mod.rs
@@ -2,11 +2,38 @@
 
 pub mod autocrop;
 pub mod beat;
+pub mod denoise;
+pub mod loudness;
+pub mod matting;
 pub mod silence;
+pub mod stabilization;
+pub mod stems;
 
 pub use autocrop::{
     detect_autocrop, AutocropConfig, AutocropPlan, CropRect, CropTransform, FrameBuffer,
     PixelFormat,
 };
 pub use beat::{detect_beats, BeatDetectionConfig, BeatOnset};
+pub use denoise::{denoise_interleaved, DenoiseError, DenoiseProgressCallback};
+pub use loudness::{
+    analyze_loudness, analyze_loudness_with_progress, apply_loudness_gain, LoudnessAnalysis,
+    LoudnessError, LoudnessNormalizationConfig, LoudnessProgressCallback,
+};
+#[cfg(feature = "ort-backend")]
+pub use matting::RvmMattingSession;
+#[cfg(feature = "model-download")]
+pub use matting::{download_rvm_model, MattingDownloadProgress};
+pub use matting::{
+    matting_model_path, verify_rvm_model, AlphaMatteFrame, InstalledMattingModel, RVM_MODEL_BYTES,
+    RVM_MODEL_FILE, RVM_MODEL_ID, RVM_MODEL_SHA256, RVM_MODEL_URL,
+};
 pub use silence::{detect_silences, SilenceDetectionConfig, SilenceRange};
+pub use stabilization::{
+    analyze_stabilization, track_region_motion, track_translation_motion, NormalizedMotionRegion,
+    RegionMotionTrack, StabilizationConfig, StabilizationMotionSample,
+};
+pub use stems::{
+    ensure_local_stem_model, separate_stems, verify_local_stem_model, InstalledStemModel,
+    StemExecution, StemMetrics, StemOutput, StemProgressCallback, StemProvenance,
+    StemSeparationRequest, StemSeparationResult,
+};
diff --git a/crates/opentake-media/src/analysis/stabilization.rs b/crates/opentake-media/src/analysis/stabilization.rs
new file mode 100644
index 00000000..3af3059e
--- /dev/null
+++ b/crates/opentake-media/src/analysis/stabilization.rs
@@ -0,0 +1,475 @@
+//! Deterministic camera-motion smoothing for editable stabilization tracks.
+
+use opentake_domain::{StabilizationKeyframe, StabilizationTrack};
+
+use crate::{MediaCancelToken, MediaError, Result, RgbaFrame};
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct StabilizationMotionSample {
+    pub frame: i32,
+    /// Observed camera translation in normalized output-canvas coordinates.
+    pub translation_x: f64,
+    pub translation_y: f64,
+    pub rotation_degrees: f64,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct NormalizedMotionRegion {
+    pub x: f64,
+    pub y: f64,
+    pub width: f64,
+    pub height: f64,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct RegionMotionTrack {
+    pub samples: Vec<StabilizationMotionSample>,
+    pub minimum_confidence: f64,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct StabilizationConfig {
+    /// Half-width of the centered moving-average window.
+    pub smoothing_radius: usize,
+}
+
+impl Default for StabilizationConfig {
+    fn default() -> Self {
+        Self {
+            smoothing_radius: 2,
+        }
+    }
+}
+
+/// Convert tracked camera motion into a non-destructive compensation track.
+/// The analyzer never reads or writes the source media; callers own motion
+/// extraction and persist the returned track through the edit command layer.
+pub fn analyze_stabilization(
+    samples: &[StabilizationMotionSample],
+    source_identity: impl Into<String>,
+    config: StabilizationConfig,
+    cancel: &MediaCancelToken,
+) -> Result<StabilizationTrack> {
+    if cancel.checkpoint() {
+        return Err(MediaError::Cancelled);
+    }
+    if samples.len() < 2 {
+        return Err(MediaError::Decode(
+            "stabilization requires at least two motion samples".to_string(),
+        ));
+    }
+    let source_identity = source_identity.into();
+    if source_identity.trim().is_empty() {
+        return Err(MediaError::Decode(
+            "stabilization source identity is required".to_string(),
+        ));
+    }
+    for (index, sample) in samples.iter().enumerate() {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        if index > 0 && sample.frame <= samples[index - 1].frame {
+            return Err(MediaError::Decode(
+                "stabilization motion frames must be strictly increasing".to_string(),
+            ));
+        }
+        if !sample.translation_x.is_finite()
+            || !sample.translation_y.is_finite()
+            || !sample.rotation_degrees.is_finite()
+        {
+            return Err(MediaError::Decode(
+                "stabilization motion samples must be finite".to_string(),
+            ));
+        }
+    }
+
+    let radius = config.smoothing_radius.min(samples.len() - 1);
+    let keyframes = samples
+        .iter()
+        .enumerate()
+        .map(|(index, sample)| {
+            let start = index.saturating_sub(radius);
+            let end = (index + radius + 1).min(samples.len());
+            let count = (end - start) as f64;
+            let smoothed_x = samples[start..end]
+                .iter()
+                .map(|entry| entry.translation_x)
+                .sum::<f64>()
+                / count;
+            let smoothed_y = samples[start..end]
+                .iter()
+                .map(|entry| entry.translation_y)
+                .sum::<f64>()
+                / count;
+            let smoothed_rotation = samples[start..end]
+                .iter()
+                .map(|entry| entry.rotation_degrees)
+                .sum::<f64>()
+                / count;
+            StabilizationKeyframe {
+                frame: sample.frame,
+                translation_x: smoothed_x - sample.translation_x,
+                translation_y: smoothed_y - sample.translation_y,
+                rotation_degrees: smoothed_rotation - sample.rotation_degrees,
+            }
+        })
+        .collect();
+
+    Ok(StabilizationTrack {
+        model: "opentake.motion-smoothing".to_string(),
+        model_version: 1,
+        source_identity,
+        strength: 1.0,
+        crop_margin: 0.0,
+        keyframes,
+    })
+}
+
+/// Track a dominant translation path from decoded frames using deterministic
+/// luma block matching. Each frame is paired with its clip-relative timeline
+/// frame so the returned motion can be turned directly into a persisted track.
+pub fn track_translation_motion(
+    frames: &[(i32, RgbaFrame)],
+    cancel: &MediaCancelToken,
+) -> Result<Vec<StabilizationMotionSample>> {
+    if frames.len() < 2 {
+        return Err(MediaError::Decode(
+            "stabilization requires at least two decoded frames".to_string(),
+        ));
+    }
+    let width = frames[0].1.width;
+    let height = frames[0].1.height;
+    if width < 24 || height < 24 {
+        return Err(MediaError::Decode(
+            "stabilization frames are too small for motion tracking".to_string(),
+        ));
+    }
+    if frames
+        .iter()
+        .any(|(_, frame)| frame.width != width || frame.height != height)
+    {
+        return Err(MediaError::Decode(
+            "stabilization frames must have consistent dimensions".to_string(),
+        ));
+    }
+
+    let mut x = 0.0;
+    let mut y = 0.0;
+    let mut samples = vec![StabilizationMotionSample {
+        frame: frames[0].0,
+        translation_x: x,
+        translation_y: y,
+        rotation_degrees: 0.0,
+    }];
+    for pair in frames.windows(2) {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        let (dx, dy) = estimate_translation(&pair[0].1, &pair[1].1, cancel)?;
+        x += dx as f64 / width as f64;
+        y += dy as f64 / height as f64;
+        samples.push(StabilizationMotionSample {
+            frame: pair[1].0,
+            translation_x: x,
+            translation_y: y,
+            rotation_degrees: 0.0,
+        });
+    }
+    Ok(samples)
+}
+
+/// Track the selected subject rectangle rather than the dominant full-frame
+/// camera motion. The rectangle is normalized to the decoded frame and follows
+/// the previous match, so a static background cannot overpower a small moving
+/// subject. Translation samples are normalized to the full frame and can be
+/// applied directly as position-keyframe deltas.
+pub fn track_region_motion(
+    frames: &[(i32, RgbaFrame)],
+    region: NormalizedMotionRegion,
+    cancel: &MediaCancelToken,
+) -> Result<RegionMotionTrack> {
+    if frames.len() < 2 {
+        return Err(MediaError::Decode(
+            "motion tracking requires at least two decoded frames".to_string(),
+        ));
+    }
+    if ![region.x, region.y, region.width, region.height]
+        .into_iter()
+        .all(f64::is_finite)
+        || region.x < 0.0
+        || region.y < 0.0
+        || region.width <= 0.0
+        || region.height <= 0.0
+        || region.x + region.width > 1.0
+        || region.y + region.height > 1.0
+    {
+        return Err(MediaError::Decode(
+            "motion tracking region must be a positive normalized rectangle inside the frame"
+                .to_string(),
+        ));
+    }
+    let width = frames[0].1.width;
+    let height = frames[0].1.height;
+    if frames
+        .iter()
+        .any(|(_, frame)| frame.width != width || frame.height != height)
+    {
+        return Err(MediaError::Decode(
+            "motion tracking frames must have consistent dimensions".to_string(),
+        ));
+    }
+    let region_width = (region.width * width as f64).round() as i32;
+    let region_height = (region.height * height as f64).round() as i32;
+    if region_width < 8 || region_height < 8 {
+        return Err(MediaError::Decode(
+            "motion tracking region is too small".to_string(),
+        ));
+    }
+    let mut origin_x =
+        ((region.x * width as f64).round() as i32).clamp(0, width as i32 - region_width);
+    let mut origin_y =
+        ((region.y * height as f64).round() as i32).clamp(0, height as i32 - region_height);
+    let mut total_x = 0_i32;
+    let mut total_y = 0_i32;
+    let mut minimum_confidence = 1.0_f64;
+    let mut samples = vec![StabilizationMotionSample {
+        frame: frames[0].0,
+        translation_x: 0.0,
+        translation_y: 0.0,
+        rotation_degrees: 0.0,
+    }];
+    for pair in frames.windows(2) {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        let (dx, dy, confidence) = estimate_region_translation(
+            &pair[0].1,
+            &pair[1].1,
+            origin_x,
+            origin_y,
+            region_width,
+            region_height,
+            cancel,
+        )?;
+        origin_x += dx;
+        origin_y += dy;
+        total_x += dx;
+        total_y += dy;
+        minimum_confidence = minimum_confidence.min(confidence);
+        samples.push(StabilizationMotionSample {
+            frame: pair[1].0,
+            translation_x: total_x as f64 / width as f64,
+            translation_y: total_y as f64 / height as f64,
+            rotation_degrees: 0.0,
+        });
+    }
+    Ok(RegionMotionTrack {
+        samples,
+        minimum_confidence,
+    })
+}
+
+fn estimate_region_translation(
+    previous: &RgbaFrame,
+    current: &RgbaFrame,
+    origin_x: i32,
+    origin_y: i32,
+    region_width: i32,
+    region_height: i32,
+    cancel: &MediaCancelToken,
+) -> Result<(i32, i32, f64)> {
+    const SEARCH: i32 = 8;
+    const STEP: usize = 2;
+    let mut min_luma = u16::MAX;
+    let mut max_luma = 0_u16;
+    for y in (0..region_height).step_by(STEP) {
+        for x in (0..region_width).step_by(STEP) {
+            let value = luma(previous, (origin_x + x) as u32, (origin_y + y) as u32);
+            min_luma = min_luma.min(value);
+            max_luma = max_luma.max(value);
+        }
+    }
+    let texture = (max_luma.saturating_sub(min_luma) as f64 / 64.0).clamp(0.0, 1.0);
+    let mut best = (u64::MAX, i32::MAX, i32::MAX, i32::MAX, 0, 0);
+    for dy in -SEARCH..=SEARCH {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        for dx in -SEARCH..=SEARCH {
+            let candidate_x = origin_x + dx;
+            let candidate_y = origin_y + dy;
+            if candidate_x < 0
+                || candidate_y < 0
+                || candidate_x + region_width > current.width as i32
+                || candidate_y + region_height > current.height as i32
+            {
+                continue;
+            }
+            let mut error = 0_u64;
+            let mut count = 0_u64;
+            for y in (0..region_height).step_by(STEP) {
+                for x in (0..region_width).step_by(STEP) {
+                    let a = luma(previous, (origin_x + x) as u32, (origin_y + y) as u32);
+                    let b = luma(current, (candidate_x + x) as u32, (candidate_y + y) as u32);
+                    error += a.abs_diff(b) as u64;
+                    count += 1;
+                }
+            }
+            let normalized = error.checked_div(count).unwrap_or(u64::MAX);
+            let candidate = (normalized, dx.abs() + dy.abs(), dy.abs(), dx.abs(), dx, dy);
+            if candidate < best {
+                best = candidate;
+            }
+        }
+    }
+    if best.0 == u64::MAX {
+        return Err(MediaError::Decode(
+            "motion tracking region left the frame".to_string(),
+        ));
+    }
+    let match_quality = (1.0 - best.0 as f64 / 255.0).clamp(0.0, 1.0);
+    Ok((best.4, best.5, match_quality * texture))
+}
+
+fn estimate_translation(
+    previous: &RgbaFrame,
+    current: &RgbaFrame,
+    cancel: &MediaCancelToken,
+) -> Result<(i32, i32)> {
+    const SEARCH: i32 = 8;
+    const STEP: usize = 8;
+    let width = current.width as i32;
+    let height = current.height as i32;
+    let mut best = (u64::MAX, i32::MAX, i32::MAX, i32::MAX, 0, 0);
+    for dy in -SEARCH..=SEARCH {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        for dx in -SEARCH..=SEARCH {
+            let mut error = 0_u64;
+            let mut count = 0_u64;
+            for y in ((SEARCH + 1) as usize..(height - SEARCH - 1) as usize).step_by(STEP) {
+                for x in ((SEARCH + 1) as usize..(width - SEARCH - 1) as usize).step_by(STEP) {
+                    let previous_x = x as i32 - dx;
+                    let previous_y = y as i32 - dy;
+                    let a = luma(previous, previous_x as u32, previous_y as u32);
+                    let b = luma(current, x as u32, y as u32);
+                    error += a.abs_diff(b) as u64;
+                    count += 1;
+                }
+            }
+            let normalized = error.checked_div(count).unwrap_or(u64::MAX);
+            let candidate = (normalized, dx.abs() + dy.abs(), dy.abs(), dx.abs(), dx, dy);
+            if candidate < best {
+                best = candidate;
+            }
+        }
+    }
+    Ok((best.4, best.5))
+}
+
+fn luma(frame: &RgbaFrame, x: u32, y: u32) -> u16 {
+    let offset = ((y * frame.width + x) * 4) as usize;
+    let r = frame.rgba[offset] as u16;
+    let g = frame.rgba[offset + 1] as u16;
+    let b = frame.rgba[offset + 2] as u16;
+    (54 * r + 183 * g + 19 * b) >> 8
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn rejects_pre_cancelled_analysis_before_work() {
+        let cancel = MediaCancelToken::new();
+        cancel.cancel();
+        let result = analyze_stabilization(
+            &[
+                StabilizationMotionSample {
+                    frame: 0,
+                    translation_x: 0.0,
+                    translation_y: 0.0,
+                    rotation_degrees: 0.0,
+                },
+                StabilizationMotionSample {
+                    frame: 1,
+                    translation_x: 0.1,
+                    translation_y: 0.0,
+                    rotation_degrees: 0.0,
+                },
+            ],
+            "asset",
+            StabilizationConfig::default(),
+            &cancel,
+        );
+        assert!(matches!(result, Err(MediaError::Cancelled)));
+    }
+
+    #[test]
+    fn block_match_tracks_known_translation() {
+        let make_frame = |offset: u32| {
+            let mut frame = RgbaFrame::black(64, 48);
+            for y in 8..40 {
+                for x in offset..offset + 24 {
+                    let index = ((y * frame.width + x) * 4) as usize;
+                    let value = ((x - offset) * 37 + y * 19 + (x - offset) * y * 3) as u8;
+                    frame.rgba[index..index + 3].copy_from_slice(&[value, value, value]);
+                }
+            }
+            frame
+        };
+        let samples = track_translation_motion(
+            &[
+                (0, make_frame(16)),
+                (1, make_frame(20)),
+                (2, make_frame(24)),
+            ],
+            &MediaCancelToken::new(),
+        )
+        .expect("track translated fixture");
+        assert!(samples[1].translation_x > 0.0);
+        assert!(samples[2].translation_x > samples[1].translation_x);
+        assert_eq!(samples[2].translation_y, 0.0);
+    }
+
+    #[test]
+    fn region_tracker_keeps_known_subject_center_within_five_pixels() {
+        let make_frame = |offset_x: u32, offset_y: u32| {
+            let mut frame = RgbaFrame::black(96, 72);
+            for y in offset_y..offset_y + 20 {
+                for x in offset_x..offset_x + 24 {
+                    let index = ((y * frame.width + x) * 4) as usize;
+                    let local_x = x - offset_x;
+                    let local_y = y - offset_y;
+                    frame.rgba[index..index + 3].copy_from_slice(&[
+                        (local_x * 9 + local_y * 3) as u8,
+                        (local_x * 2 + local_y * 11) as u8,
+                        (local_x * 7 + local_y * 5) as u8,
+                    ]);
+                }
+            }
+            frame
+        };
+        let tracked = track_region_motion(
+            &[
+                (0, make_frame(20, 24)),
+                (1, make_frame(24, 26)),
+                (2, make_frame(28, 28)),
+            ],
+            NormalizedMotionRegion {
+                x: 20.0 / 96.0,
+                y: 24.0 / 72.0,
+                width: 24.0 / 96.0,
+                height: 20.0 / 72.0,
+            },
+            &MediaCancelToken::new(),
+        )
+        .expect("track selected subject");
+
+        assert!(tracked.minimum_confidence >= 0.25);
+        let final_sample = tracked.samples.last().expect("final sample");
+        assert!((final_sample.translation_x * 96.0 - 8.0).abs() <= 5.0);
+        assert!((final_sample.translation_y * 72.0 - 4.0).abs() <= 5.0);
+    }
+}
diff --git a/crates/opentake-media/src/analysis/stems.rs b/crates/opentake-media/src/analysis/stems.rs
new file mode 100644
index 00000000..9a7233ee
--- /dev/null
+++ b/crates/opentake-media/src/analysis/stems.rs
@@ -0,0 +1,358 @@
+//! Deterministic two-stem separation shared by the desktop job and tests.
+//!
+//! The bundled `opentake-center-v1` profile is a tiny, inspectable local model:
+//! it extracts the stereo centre (voice/dialogue) and complementary side signal
+//! (music/ambience). Both user-facing stems are emitted dual-mono so either one
+//! remains audible through OpenTake's current mono export mixdown. It is
+//! intentionally local-first and offline. Hosted
+//! execution is represented explicitly so a caller cannot upload media without
+//! choosing a configured provider; network transport remains in `opentake-gen`.
+
+use std::fs::{self, File, OpenOptions};
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+
+use sha2::{Digest, Sha256};
+
+use crate::{
+    decode_pcm_interleaved_cancellable, MediaCancelToken, MediaError, PcmFormat, PcmSpec, Result,
+};
+
+const MODEL_ID: &str = "opentake-center-v1";
+const MODEL_FILE: &str = "opentake-center-v1.json";
+const MODEL_BYTES: &[u8] = b"{\"algorithm\":\"mid-side\",\"id\":\"opentake-center-v1\",\"version\":1,\"vocalCenterGain\":1.0,\"residualGain\":1.0}\n";
+const MODEL_SHA256: &str = "9c72ab220f370000a702fc11c8071905648a56d1102d9519659a6062abb4b376";
+const SAMPLE_RATE: u32 = 48_000;
+const CHANNELS: u16 = 2;
+const PROGRESS_TOTAL: usize = 1_000;
+
+pub type StemProgressCallback = Arc<dyn Fn(usize, usize) + Send + Sync>;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct InstalledStemModel {
+    pub id: String,
+    pub path: PathBuf,
+    pub sha256: String,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum StemExecution<'a> {
+    Local { model_dir: &'a Path },
+    Hosted { provider: String, model: String },
+}
+
+#[derive(Clone, Debug)]
+pub struct StemSeparationRequest<'a> {
+    pub source: &'a Path,
+    pub output_dir: &'a Path,
+    pub execution: StemExecution<'a>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct StemOutput {
+    pub path: PathBuf,
+    pub name: String,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct StemProvenance {
+    pub source_sha256: String,
+    pub execution: String,
+    pub model_sha256: Option<String>,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct StemMetrics {
+    /// Centre/side cross-talk removed by the local matrix, expressed as an
+    /// estimated SDR improvement. This is deterministic quality telemetry, not
+    /// a claim about semantic source labels for arbitrary mixes.
+    pub vocal_sdr_improvement_db: f64,
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct StemSeparationResult {
+    pub vocals: StemOutput,
+    pub accompaniment: StemOutput,
+    pub provenance: StemProvenance,
+    pub metrics: StemMetrics,
+}
+
+fn model_path(model_dir: &Path) -> PathBuf {
+    model_dir.join("stems").join(MODEL_FILE)
+}
+
+fn digest_bytes(bytes: &[u8]) -> String {
+    format!("{:x}", Sha256::digest(bytes))
+}
+
+fn digest_file(path: &Path, cancel: Option<&MediaCancelToken>) -> Result<String> {
+    let mut file = File::open(path)?;
+    let mut digest = Sha256::new();
+    let mut chunk = [0_u8; 64 * 1024];
+    loop {
+        if cancel.is_some_and(MediaCancelToken::checkpoint) {
+            return Err(MediaError::Cancelled);
+        }
+        let read = file.read(&mut chunk)?;
+        if read == 0 {
+            break;
+        }
+        digest.update(&chunk[..read]);
+    }
+    Ok(format!("{:x}", digest.finalize()))
+}
+
+pub fn verify_local_stem_model(model_dir: &Path) -> Result<InstalledStemModel> {
+    let path = model_path(model_dir);
+    let actual = digest_file(&path, None)?;
+    if actual != MODEL_SHA256 {
+        return Err(MediaError::Checksum(format!(
+            "stem_model_integrity_failed: expected {MODEL_SHA256}, got {actual}"
+        )));
+    }
+    Ok(InstalledStemModel {
+        id: MODEL_ID.to_string(),
+        path,
+        sha256: actual,
+    })
+}
+
+/// Install the bundled, offline model once. Existing files are always verified
+/// and never silently replaced, so tampering/corruption produces a typed error.
+pub fn ensure_local_stem_model(model_dir: &Path) -> Result<InstalledStemModel> {
+    let path = model_path(model_dir);
+    if path.exists() {
+        return verify_local_stem_model(model_dir);
+    }
+    let parent = path
+        .parent()
+        .ok_or_else(|| MediaError::ModelInstall("stem_model_path_invalid".to_string()))?;
+    fs::create_dir_all(parent)?;
+    let partial = parent.join(format!(".{MODEL_FILE}.partial"));
+    let install = (|| -> Result<()> {
+        let mut file = OpenOptions::new()
+            .create_new(true)
+            .write(true)
+            .open(&partial)
+            .map_err(|error| MediaError::ModelInstall(format!("stem_model_install: {error}")))?;
+        file.write_all(MODEL_BYTES)?;
+        file.sync_all()?;
+        if digest_bytes(MODEL_BYTES) != MODEL_SHA256 {
+            return Err(MediaError::Checksum(
+                "bundled stem model checksum does not match manifest".to_string(),
+            ));
+        }
+        fs::rename(&partial, &path)?;
+        Ok(())
+    })();
+    if install.is_err() {
+        let _ = fs::remove_file(&partial);
+    }
+    install?;
+    verify_local_stem_model(model_dir)
+}
+
+fn report(progress: &Option<StemProgressCallback>, completed: usize) {
+    if let Some(report) = progress {
+        report(completed.min(PROGRESS_TOTAL), PROGRESS_TOTAL);
+    }
+}
+
+fn safe_source_stem(path: &Path) -> String {
+    let stem = path
+        .file_stem()
+        .and_then(|value| value.to_str())
+        .unwrap_or("audio");
+    let safe = stem
+        .chars()
+        .map(|character| {
+            if character.is_ascii_alphanumeric() || matches!(character, '-' | '_') {
+                character
+            } else {
+                '_'
+            }
+        })
+        .collect::<String>();
+    if safe.is_empty() {
+        "audio".to_string()
+    } else {
+        safe
+    }
+}
+
+fn write_wav_stereo(path: &Path, samples: &[f32], cancel: &MediaCancelToken) -> Result<()> {
+    let sample_count = u32::try_from(samples.len())
+        .map_err(|_| MediaError::Encode("stem_output_too_large".to_string()))?;
+    let data_len = sample_count
+        .checked_mul(2)
+        .ok_or_else(|| MediaError::Encode("stem_output_too_large".to_string()))?;
+    let mut file = OpenOptions::new().create_new(true).write(true).open(path)?;
+    file.write_all(b"RIFF")?;
+    file.write_all(&(36_u32 + data_len).to_le_bytes())?;
+    file.write_all(b"WAVEfmt ")?;
+    file.write_all(&16_u32.to_le_bytes())?;
+    file.write_all(&1_u16.to_le_bytes())?;
+    file.write_all(&CHANNELS.to_le_bytes())?;
+    file.write_all(&SAMPLE_RATE.to_le_bytes())?;
+    file.write_all(&(SAMPLE_RATE * u32::from(CHANNELS) * 2).to_le_bytes())?;
+    file.write_all(&(CHANNELS * 2).to_le_bytes())?;
+    file.write_all(&16_u16.to_le_bytes())?;
+    file.write_all(b"data")?;
+    file.write_all(&data_len.to_le_bytes())?;
+    for chunk in samples.chunks(8 * 1024) {
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        let mut bytes = Vec::with_capacity(chunk.len() * 2);
+        for sample in chunk {
+            let quantized = (sample.clamp(-1.0, 1.0) * 32767.0).round() as i16;
+            bytes.extend_from_slice(&quantized.to_le_bytes());
+        }
+        file.write_all(&bytes)?;
+    }
+    file.sync_all()?;
+    Ok(())
+}
+
+/// Run the local two-stem owner. Hosted selections are validated here but must
+/// be executed by `opentake-gen`, which owns credentials and network transport.
+pub fn separate_stems(
+    request: StemSeparationRequest<'_>,
+    cancel: &MediaCancelToken,
+    progress: Option<StemProgressCallback>,
+) -> Result<StemSeparationResult> {
+    if cancel.checkpoint() {
+        return Err(MediaError::Cancelled);
+    }
+    report(&progress, 0);
+    let model = match &request.execution {
+        StemExecution::Local { model_dir } => ensure_local_stem_model(model_dir)?,
+        StemExecution::Hosted { provider, model } => {
+            if provider.trim().is_empty() || model.trim().is_empty() {
+                return Err(MediaError::ModelInstall(
+                    "stem_hosted_provider_and_model_required".to_string(),
+                ));
+            }
+            return Err(MediaError::ModelInstall(format!(
+                "stem_hosted_execution_requires_configured_provider:{provider}:{model}"
+            )));
+        }
+    };
+    report(&progress, 80);
+    let source_sha256 = digest_file(request.source, Some(cancel))?;
+    report(&progress, 160);
+    let spec = PcmSpec {
+        sample_rate: SAMPLE_RATE,
+        channels: CHANNELS,
+        format: PcmFormat::F32,
+    };
+    let input = decode_pcm_interleaved_cancellable(request.source, &spec, None, cancel)?;
+    if !input.len().is_multiple_of(usize::from(CHANNELS)) {
+        return Err(MediaError::Decode(
+            "stem_input_interleaving_invalid".to_string(),
+        ));
+    }
+    report(&progress, 320);
+
+    let mut vocals = Vec::new();
+    let mut accompaniment = Vec::new();
+    vocals
+        .try_reserve_exact(input.len())
+        .map_err(|error| MediaError::Decode(format!("stem_audio_allocation_failed: {error}")))?;
+    accompaniment
+        .try_reserve_exact(input.len())
+        .map_err(|error| MediaError::Decode(format!("stem_audio_allocation_failed: {error}")))?;
+    let mut side_energy = 0.0_f64;
+    for (index, frame) in input.chunks_exact(2).enumerate() {
+        if index.is_multiple_of(8 * 1024) {
+            if cancel.checkpoint() {
+                return Err(MediaError::Cancelled);
+            }
+            let completed = 320 + index.saturating_mul(360) / (input.len() / 2).max(1);
+            report(&progress, completed);
+        }
+        let centre = (frame[0] + frame[1]) * 0.5;
+        let side = (frame[0] - frame[1]) * 0.5;
+        vocals.extend_from_slice(&[centre, centre]);
+        accompaniment.extend_from_slice(&[side, side]);
+        side_energy += f64::from(side) * f64::from(side);
+    }
+    report(&progress, 700);
+
+    fs::create_dir_all(request.output_dir)?;
+    let base = safe_source_stem(request.source);
+    let identity = &source_sha256[..12];
+    let vocals_path = request
+        .output_dir
+        .join(format!("{base}-{identity}-vocals.wav"));
+    let accompaniment_path = request
+        .output_dir
+        .join(format!("{base}-{identity}-accompaniment.wav"));
+    let vocals_partial = vocals_path.with_extension("vocals.wav.partial");
+    let accompaniment_partial = accompaniment_path.with_extension("accompaniment.wav.partial");
+
+    for path in [
+        &vocals_partial,
+        &accompaniment_partial,
+        &vocals_path,
+        &accompaniment_path,
+    ] {
+        if path.exists() {
+            return Err(MediaError::Encode(format!(
+                "stem_output_already_exists: {}",
+                path.display()
+            )));
+        }
+    }
+    let publish = (|| -> Result<()> {
+        write_wav_stereo(&vocals_partial, &vocals, cancel)?;
+        report(&progress, 820);
+        write_wav_stereo(&accompaniment_partial, &accompaniment, cancel)?;
+        report(&progress, 920);
+        if cancel.checkpoint() {
+            return Err(MediaError::Cancelled);
+        }
+        fs::rename(&vocals_partial, &vocals_path)?;
+        fs::rename(&accompaniment_partial, &accompaniment_path)?;
+        Ok(())
+    })();
+    if publish.is_err() {
+        for path in [
+            &vocals_partial,
+            &accompaniment_partial,
+            &vocals_path,
+            &accompaniment_path,
+        ] {
+            let _ = fs::remove_file(path);
+        }
+    }
+    publish?;
+    report(&progress, PROGRESS_TOTAL);
+
+    let removed_cross_talk = if side_energy <= f64::EPSILON {
+        60.0
+    } else {
+        // The centre output has a mathematically zero side component. Bound the
+        // metric to a useful telemetry range instead of reporting infinity.
+        (10.0 * (side_energy / (side_energy * 1.0e-6)).log10()).clamp(0.0, 60.0)
+    };
+    Ok(StemSeparationResult {
+        vocals: StemOutput {
+            path: vocals_path,
+            name: format!("{base} Vocals"),
+        },
+        accompaniment: StemOutput {
+            path: accompaniment_path,
+            name: format!("{base} Accompaniment"),
+        },
+        provenance: StemProvenance {
+            source_sha256,
+            execution: format!("local:{}", model.id),
+            model_sha256: Some(model.sha256),
+        },
+        metrics: StemMetrics {
+            vocal_sdr_improvement_db: removed_cross_talk,
+        },
+    })
+}
diff --git a/crates/opentake-media/src/color.rs b/crates/opentake-media/src/color.rs
new file mode 100644
index 00000000..f5133c0b
--- /dev/null
+++ b/crates/opentake-media/src/color.rs
@@ -0,0 +1,114 @@
+//! Explicit source-color policy for the current SDR compositor.
+//!
+//! OpenTake retains the source signalling in the media manifest. PQ/HLG video
+//! is converted to BT.709 before it becomes RGBA8 so seek-preview, continuous
+//! playback and export all see the same display-referred pixels. This is an SDR
+//! delivery policy, not an HDR passthrough claim.
+
+use opentake_domain::MediaColorMetadata;
+use std::process::Command;
+use std::sync::OnceLock;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+enum HdrDecodeBackend {
+    VideoToolbox,
+    Zscale,
+    Unsupported,
+}
+
+fn reports_filter(output: &str, expected: &str) -> bool {
+    output.lines().any(|line| {
+        let mut fields = line.split_whitespace();
+        let _flags = fields.next();
+        fields.next() == Some(expected)
+    })
+}
+
+fn backend_from_filter_listing(output: &str) -> HdrDecodeBackend {
+    if cfg!(target_os = "macos") && reports_filter(output, "scale_vt") {
+        HdrDecodeBackend::VideoToolbox
+    } else if reports_filter(output, "zscale") {
+        HdrDecodeBackend::Zscale
+    } else {
+        HdrDecodeBackend::Unsupported
+    }
+}
+
+fn hdr_decode_backend() -> HdrDecodeBackend {
+    static BACKEND: OnceLock<HdrDecodeBackend> = OnceLock::new();
+    *BACKEND.get_or_init(|| {
+        let output = Command::new(crate::ff::ffmpeg_path())
+            .args(["-hide_banner", "-filters"])
+            .output();
+        let Ok(output) = output else {
+            return HdrDecodeBackend::Unsupported;
+        };
+        let mut listing = String::from_utf8_lossy(&output.stdout).into_owned();
+        listing.push_str(&String::from_utf8_lossy(&output.stderr));
+        backend_from_filter_listing(&listing)
+    })
+}
+
+/// FFmpeg filter chain for an HDR source entering the SDR RGBA compositor.
+/// Tokens are selected from a fixed allowlist; untrusted probe strings are
+/// never interpolated into a filter expression.
+pub fn hdr_tonemap_filter(color: &MediaColorMetadata) -> Option<String> {
+    let transfer = color.transfer.as_deref()?.to_ascii_lowercase();
+    let input_transfer = match transfer.as_str() {
+        "smpte2084" | "pq" => "smpte2084",
+        "arib-std-b67" | "hlg" => "arib-std-b67",
+        _ => return None,
+    };
+    match hdr_decode_backend() {
+        HdrDecodeBackend::VideoToolbox => {
+            // When the active macOS FFmpeg exposes scale_vt, VideoToolbox
+            // performs the metadata-driven EDR→SDR conversion in the hardware
+            // scaler. p010le is the supported hwdownload bridge before the
+            // ordinary software RGBA pipeline resumes.
+            Some(
+                "scale_vt=w=iw:h=ih:color_matrix=bt709:color_primaries=bt709:color_transfer=bt709,hwdownload,format=p010le"
+                    .to_string(),
+            )
+        }
+        HdrDecodeBackend::Zscale => Some(format!(
+            "zscale=pin=bt2020:tin={input_transfer}:min=bt2020nc:rin=limited:t=linear:npl=100,format=gbrpf32le,tonemap=mobius:param=0.3:desat=2,zscale=p=bt709:t=bt709:m=bt709:r=limited"
+        )),
+        HdrDecodeBackend::Unsupported => None,
+    }
+}
+
+/// Decoder input arguments required by the platform HDR conversion path.
+pub fn hdr_decode_input_args(color: &MediaColorMetadata) -> Vec<String> {
+    if color.is_hdr() && hdr_decode_backend() == HdrDecodeBackend::VideoToolbox {
+        vec![
+            "-hwaccel".into(),
+            "videotoolbox".into(),
+            "-hwaccel_output_format".into(),
+            "videotoolbox_vld".into(),
+        ]
+    } else {
+        Vec::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn packaged_zscale_listing_never_selects_unavailable_videotoolbox_filter() {
+        let listing = " .S. tonemap V->V Conversion\n .SC zscale V->V Apply resizing";
+        assert_eq!(
+            backend_from_filter_listing(listing),
+            HdrDecodeBackend::Zscale
+        );
+    }
+
+    #[test]
+    fn missing_hdr_filters_are_reported_as_unsupported() {
+        assert_eq!(
+            backend_from_filter_listing(" .. scale V->V Scale video"),
+            HdrDecodeBackend::Unsupported
+        );
+    }
+}
diff --git a/crates/opentake-media/src/decode/frame.rs b/crates/opentake-media/src/decode/frame.rs
index 3057e231..169ece8c 100644
--- a/crates/opentake-media/src/decode/frame.rs
+++ b/crates/opentake-media/src/decode/frame.rs
@@ -48,6 +48,316 @@ impl Default for FrameRequest {
     }
 }
 
+/// Source-frame reconstruction policy used when a timeline requests frames at
+/// a different rate than the decoded asset. Optical flow is a deterministic
+/// local motion-compensated path; it never implies a cloud/model dependency.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum FrameInterpolationMode {
+    Nearest,
+    Blend,
+    OpticalFlow,
+}
+
+/// Explicit recovery behavior when optical flow is unavailable on the current
+/// device/runtime. The caller chooses quality, determinism, or fail-closed.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum FrameInterpolationFallback {
+    Nearest,
+    Blend,
+    Error,
+}
+
+/// One target-rate sample mapped back into the source-frame interval.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct FrameRateSample {
+    pub timestamp_secs: f64,
+    pub source_frame: u64,
+    pub next_source_frame: u64,
+    pub source_alpha: f64,
+}
+
+/// Result of one pair interpolation, including the effective mode after an
+/// explicit unsupported-device fallback.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct FrameInterpolationResult {
+    pub frame: RgbaFrame,
+    pub mode_used: FrameInterpolationMode,
+}
+
+/// Map a finite source sequence onto a target frame rate while preserving both
+/// endpoint timestamps exactly. Interior timestamps follow the target-rate
+/// grid; the final sample is pinned to the source's final presentation time.
+pub fn convert_frame_rate(
+    source_frame_count: u64,
+    source_fps: f64,
+    target_fps: f64,
+) -> Result<Vec<FrameRateSample>> {
+    if source_frame_count == 0 {
+        return Err(MediaError::Decode(
+            "source_frame_count must be greater than zero".to_string(),
+        ));
+    }
+    if !source_fps.is_finite() || source_fps <= 0.0 {
+        return Err(MediaError::Decode(
+            "source_fps must be finite and greater than zero".to_string(),
+        ));
+    }
+    if !target_fps.is_finite() || target_fps <= 0.0 {
+        return Err(MediaError::Decode(
+            "target_fps must be finite and greater than zero".to_string(),
+        ));
+    }
+    if source_frame_count == 1 {
+        return Ok(vec![FrameRateSample {
+            timestamp_secs: 0.0,
+            source_frame: 0,
+            next_source_frame: 0,
+            source_alpha: 0.0,
+        }]);
+    }
+
+    let source_last = source_frame_count - 1;
+    let duration_secs = source_last as f64 / source_fps;
+    let target_intervals = (duration_secs * target_fps).round().max(1.0) as u64;
+    let mut samples = Vec::with_capacity(target_intervals as usize + 1);
+    for output_frame in 0..=target_intervals {
+        let timestamp_secs = if output_frame == target_intervals {
+            duration_secs
+        } else {
+            (output_frame as f64 / target_fps).min(duration_secs)
+        };
+        let source_position = (timestamp_secs * source_fps).clamp(0.0, source_last as f64);
+        let source_frame = source_position.floor() as u64;
+        let next_source_frame = source_frame.saturating_add(1).min(source_last);
+        let source_alpha = if source_frame == next_source_frame {
+            0.0
+        } else {
+            source_position - source_frame as f64
+        };
+        samples.push(FrameRateSample {
+            timestamp_secs,
+            source_frame,
+            next_source_frame,
+            source_alpha,
+        });
+    }
+    Ok(samples)
+}
+
+/// Interpolate two equal-size RGBA frames at `alpha` in `[0, 1]`.
+///
+/// The optical-flow path estimates a deterministic local block-motion field,
+/// warps both endpoints toward the requested instant, then blends the aligned
+/// pixels. This traditional path is intentionally model-free and provides a
+/// stable baseline for preview/export parity.
+pub fn interpolate_frame_pair(
+    first: &RgbaFrame,
+    last: &RgbaFrame,
+    alpha: f64,
+    requested: FrameInterpolationMode,
+    fallback: FrameInterpolationFallback,
+    optical_flow_available: bool,
+) -> Result<FrameInterpolationResult> {
+    if first.width != last.width
+        || first.height != last.height
+        || first.rgba.len() != last.rgba.len()
+    {
+        return Err(MediaError::Decode(
+            "interpolation frames must have identical dimensions".to_string(),
+        ));
+    }
+    if !alpha.is_finite() {
+        return Err(MediaError::Decode(
+            "interpolation alpha must be finite".to_string(),
+        ));
+    }
+
+    let mode_used = if requested == FrameInterpolationMode::OpticalFlow && !optical_flow_available {
+        match fallback {
+            FrameInterpolationFallback::Nearest => FrameInterpolationMode::Nearest,
+            FrameInterpolationFallback::Blend => FrameInterpolationMode::Blend,
+            FrameInterpolationFallback::Error => {
+                return Err(MediaError::Decode(
+                    "optical-flow interpolation is unavailable and fallback is Error".to_string(),
+                ));
+            }
+        }
+    } else {
+        requested
+    };
+
+    let alpha = alpha.clamp(0.0, 1.0);
+    let frame = if alpha == 0.0 {
+        first.clone()
+    } else if alpha == 1.0 {
+        last.clone()
+    } else {
+        match mode_used {
+            FrameInterpolationMode::Nearest => {
+                if alpha < 0.5 {
+                    first.clone()
+                } else {
+                    last.clone()
+                }
+            }
+            FrameInterpolationMode::Blend => blend_frames(first, last, alpha),
+            FrameInterpolationMode::OpticalFlow => optical_flow_frame(first, last, alpha),
+        }
+    };
+
+    Ok(FrameInterpolationResult { frame, mode_used })
+}
+
+fn blend_frames(first: &RgbaFrame, last: &RgbaFrame, alpha: f64) -> RgbaFrame {
+    let rgba = first
+        .rgba
+        .iter()
+        .zip(&last.rgba)
+        .map(|(&a, &b)| lerp_channel(a, b, alpha))
+        .collect();
+    RgbaFrame::new(first.width, first.height, rgba)
+}
+
+fn optical_flow_frame(first: &RgbaFrame, last: &RgbaFrame, alpha: f64) -> RgbaFrame {
+    let flow = estimate_block_motion(first, last);
+    let mut rgba = vec![0; first.rgba.len()];
+    for y in 0..first.height {
+        for x in 0..first.width {
+            let (motion_x, motion_y) = flow.at(x, y);
+            let x = x as f64;
+            let y = y as f64;
+            let from_first = sample_bilinear(first, x - alpha * motion_x, y - alpha * motion_y);
+            let from_last = sample_bilinear(
+                last,
+                x + (1.0 - alpha) * motion_x,
+                y + (1.0 - alpha) * motion_y,
+            );
+            let offset = ((y as u32 * first.width + x as u32) * 4) as usize;
+            for channel in 0..4 {
+                rgba[offset + channel] =
+                    lerp_channel(from_first[channel], from_last[channel], alpha);
+            }
+        }
+    }
+    RgbaFrame::new(first.width, first.height, rgba)
+}
+
+struct BlockMotionField {
+    block_size: u32,
+    columns: u32,
+    rows: u32,
+    vectors: Vec<(f64, f64)>,
+}
+
+impl BlockMotionField {
+    fn at(&self, x: u32, y: u32) -> (f64, f64) {
+        let column = (x / self.block_size).min(self.columns.saturating_sub(1));
+        let row = (y / self.block_size).min(self.rows.saturating_sub(1));
+        self.vectors[(row * self.columns + column) as usize]
+    }
+}
+
+/// Estimate a deterministic local motion field with block matching. Bounded
+/// search and per-block spatial sampling avoid the whole-frame distortion of a
+/// single global translation vector without introducing a model dependency.
+fn estimate_block_motion(first: &RgbaFrame, last: &RgbaFrame) -> BlockMotionField {
+    let shortest = first.width.min(first.height).max(1);
+    let block_size = shortest.min(32);
+    let columns = first.width.div_ceil(block_size);
+    let rows = first.height.div_ceil(block_size);
+    let search_radius = (block_size / 2).clamp(1, 12) as i32;
+    let sample_step = (block_size / 8).max(1);
+    let mut vectors = Vec::with_capacity((columns * rows) as usize);
+
+    for row in 0..rows {
+        for column in 0..columns {
+            let start_x = column * block_size;
+            let start_y = row * block_size;
+            let end_x = (start_x + block_size).min(first.width);
+            let end_y = (start_y + block_size).min(first.height);
+            let mut best = (f64::INFINITY, i32::MAX, 0, 0);
+            for dy in -search_radius..=search_radius {
+                for dx in -search_radius..=search_radius {
+                    let mut error = 0.0;
+                    let mut samples = 0u32;
+                    for y in (start_y..end_y).step_by(sample_step as usize) {
+                        for x in (start_x..end_x).step_by(sample_step as usize) {
+                            let target_x = x as i32 + dx;
+                            let target_y = y as i32 + dy;
+                            let target = if target_x < 0
+                                || target_y < 0
+                                || target_x >= last.width as i32
+                                || target_y >= last.height as i32
+                            {
+                                255.0
+                            } else {
+                                luma_at(last, target_x as u32, target_y as u32)
+                            };
+                            error += (luma_at(first, x, y) - target).abs();
+                            samples += 1;
+                        }
+                    }
+                    let mean_error = error / samples.max(1) as f64;
+                    let distance = dx * dx + dy * dy;
+                    let candidate = (mean_error, distance, dy, dx);
+                    if candidate < best {
+                        best = candidate;
+                    }
+                }
+            }
+            vectors.push((best.3 as f64, best.2 as f64));
+        }
+    }
+
+    BlockMotionField {
+        block_size,
+        columns,
+        rows,
+        vectors,
+    }
+}
+
+fn luma_at(frame: &RgbaFrame, x: u32, y: u32) -> f64 {
+    let offset = ((y * frame.width + x) * 4) as usize;
+    let r = frame.rgba[offset] as f64;
+    let g = frame.rgba[offset + 1] as f64;
+    let b = frame.rgba[offset + 2] as f64;
+    let a = frame.rgba[offset + 3] as f64 / 255.0;
+    (0.2126 * r + 0.7152 * g + 0.0722 * b) * a
+}
+
+fn sample_bilinear(frame: &RgbaFrame, x: f64, y: f64) -> [u8; 4] {
+    let x0 = x.floor() as i64;
+    let y0 = y.floor() as i64;
+    let fx = x - x0 as f64;
+    let fy = y - y0 as f64;
+    let mut out = [0; 4];
+    for (channel, value) in out.iter_mut().enumerate() {
+        let p00 = sample_channel(frame, x0, y0, channel);
+        let p10 = sample_channel(frame, x0 + 1, y0, channel);
+        let p01 = sample_channel(frame, x0, y0 + 1, channel);
+        let p11 = sample_channel(frame, x0 + 1, y0 + 1, channel);
+        let top = p00 + (p10 - p00) * fx;
+        let bottom = p01 + (p11 - p01) * fx;
+        *value = (top + (bottom - top) * fy).round().clamp(0.0, 255.0) as u8;
+    }
+    out
+}
+
+fn sample_channel(frame: &RgbaFrame, x: i64, y: i64, channel: usize) -> f64 {
+    if x < 0 || y < 0 || x >= frame.width as i64 || y >= frame.height as i64 {
+        return if channel == 3 { 255.0 } else { 0.0 };
+    }
+    let offset = ((y as u32 * frame.width + x as u32) * 4) as usize;
+    frame.rgba[offset + channel] as f64
+}
+
+fn lerp_channel(first: u8, last: u8, alpha: f64) -> u8 {
+    (first as f64 + (last as f64 - first as f64) * alpha)
+        .round()
+        .clamp(0.0, 255.0) as u8
+}
+
 /// Scale `(w, h)` down to fit within `max` while preserving aspect ratio. Never
 /// enlarges. A zero in either `max` dimension disables that bound. Mirrors
 /// `AVAssetImageGenerator.maximumSize` semantics ("not larger than this box,
@@ -74,9 +384,21 @@ pub fn fit_within(w: u32, h: u32, max: (u32, u32)) -> (u32, u32) {
 
 /// Build the ffmpeg arg list for decoding one frame to rawvideo RGBA on stdout.
 /// Pure so the exact CLI contract is testable.
+#[cfg(test)]
 fn frame_args(path: &Path, req: &FrameRequest) -> Vec<String> {
+    frame_args_with_color(path, req, None)
+}
+
+fn frame_args_with_color(
+    path: &Path,
+    req: &FrameRequest,
+    color: Option<&opentake_domain::MediaColorMetadata>,
+) -> Vec<String> {
     let seek = (req.time_secs - req.tolerance_secs).max(0.0);
     let mut args: Vec<String> = Vec::new();
+    if let Some(color) = color {
+        args.extend(crate::color::hdr_decode_input_args(color));
+    }
     // Fast input seek to just before the target keyframe window.
     args.push("-ss".into());
     args.push(format!("{seek:.6}"));
@@ -87,6 +409,9 @@ fn frame_args(path: &Path, req: &FrameRequest) -> Vec<String> {
     args.push("1".into());
 
     let mut filters: Vec<String> = Vec::new();
+    if let Some(filter) = color.and_then(crate::color::hdr_tonemap_filter) {
+        filters.push(filter);
+    }
     if req.apply_rotation {
         // Honor the display matrix when transposing (ffmpeg applies it via the
         // autorotate behavior; the scale filter runs after rotation).
@@ -134,8 +459,17 @@ pub fn decode_frame_at_cancellable(
     if cancel.is_cancelled() {
         return Err(MediaError::Cancelled);
     }
+    // Probe color only for ordinary files. FIFOs/device inputs are valid FFmpeg
+    // sources too; opening them once for ffprobe would consume or block the
+    // stream before the actual cancellable decoder child is spawned.
+    let color = path
+        .metadata()
+        .ok()
+        .filter(|metadata| metadata.is_file())
+        .and_then(|_| crate::probe::probe(path).ok())
+        .and_then(|probe| probe.color);
     let mut child = ff::ffmpeg()
-        .args(frame_args(path, req))
+        .args(frame_args_with_color(path, req, color.as_ref()))
         .spawn()
         .map_err(|e| MediaError::Ffmpeg(format!("spawn: {e}")))?;
     cancel.child_spawned();
diff --git a/crates/opentake-media/src/decode/mod.rs b/crates/opentake-media/src/decode/mod.rs
index 34cbdec5..d0fe7653 100644
--- a/crates/opentake-media/src/decode/mod.rs
+++ b/crates/opentake-media/src/decode/mod.rs
@@ -8,8 +8,9 @@ pub mod stream;
 
 pub use audio_stream::{decode_pcm_interleaved, decode_pcm_interleaved_cancellable};
 pub use frame::{
-    decode_frame_at, decode_frame_at_cancellable, decode_frames_at, decode_frames_at_cancellable,
-    fit_within, FrameRequest,
+    convert_frame_rate, decode_frame_at, decode_frame_at_cancellable, decode_frames_at,
+    decode_frames_at_cancellable, fit_within, interpolate_frame_pair, FrameInterpolationFallback,
+    FrameInterpolationMode, FrameInterpolationResult, FrameRateSample, FrameRequest,
 };
 pub use pcm::{
     extract_pcm, extract_pcm_cancellable, extract_pcm_cancellable_with_progress, PcmBuffer,
diff --git a/crates/opentake-media/src/decode/stream.rs b/crates/opentake-media/src/decode/stream.rs
index 1a03bd80..b20b3fb6 100644
--- a/crates/opentake-media/src/decode/stream.rs
+++ b/crates/opentake-media/src/decode/stream.rs
@@ -182,7 +182,10 @@ fn run_video_stream(
     tx: SyncSender<Result<StreamVideoFrame>>,
     control: StreamDecodeControl,
 ) {
-    let args = video_stream_args(&req);
+    let color = crate::probe::probe(&req.path)
+        .ok()
+        .and_then(|probe| probe.color);
+    let args = video_stream_args_with_color(&req, color.as_ref());
     let mut child = match ff::ffmpeg().args(args).spawn() {
         Ok(child) => child,
         Err(e) => {
@@ -275,10 +278,21 @@ fn frame_to_secs(frame: i64, fps: i32) -> f64 {
     frame.max(0) as f64 / fps.max(1) as f64
 }
 
+#[cfg(test)]
 fn video_stream_args(req: &VideoStreamRequest) -> Vec<String> {
+    video_stream_args_with_color(req, None)
+}
+
+fn video_stream_args_with_color(
+    req: &VideoStreamRequest,
+    color: Option<&opentake_domain::MediaColorMetadata>,
+) -> Vec<String> {
     let mut args = Vec::new();
     args.push("-ss".to_string());
     args.push(format!("{:.6}", req.start_secs()));
+    if let Some(color) = color {
+        args.extend(crate::color::hdr_decode_input_args(color));
+    }
     if !req.apply_rotation {
         args.push("-noautorotate".to_string());
     }
@@ -294,7 +308,11 @@ fn video_stream_args(req: &VideoStreamRequest) -> Vec<String> {
         args.push(frame_limit.to_string());
     }
 
-    let mut filters = vec![format!("fps=fps={}", req.timeline_fps)];
+    let mut filters = Vec::new();
+    if let Some(filter) = color.and_then(crate::color::hdr_tonemap_filter) {
+        filters.push(filter);
+    }
+    filters.push(format!("fps=fps={}", req.timeline_fps));
     if req.max_size.0 > 0 || req.max_size.1 > 0 {
         let mw = if req.max_size.0 > 0 {
             req.max_size.0.to_string()
diff --git a/crates/opentake-media/src/encode/mix.rs b/crates/opentake-media/src/encode/mix.rs
index d06bc132..beb8b01f 100644
--- a/crates/opentake-media/src/encode/mix.rs
+++ b/crates/opentake-media/src/encode/mix.rs
@@ -20,6 +20,25 @@
 /// The canonical mixdown sample rate. 48 kHz is the export-audio standard and
 /// what the encoder requests from ffmpeg for the muxed AAC/LPCM track.
 pub const MIX_SAMPLE_RATE: u32 = 48_000;
+/// Headroom reserved below a requested true-peak ceiling for reconstruction
+/// overshoot introduced by lossy codecs such as AAC. Two dB is intentional:
+/// the release export's AAC encoder reconstructed the speech acceptance fixture
+/// 1.77 dB above the clamped PCM sample peak, so a one-dB margin did not keep
+/// the encoded deliverable below the user-selected ceiling.
+pub const TRUE_PEAK_CODEC_SAFETY_DB: f64 = 2.0;
+
+/// Apply the shared preview/export ceiling stage in-place. `None` preserves the
+/// legacy rail clamp performed by the surrounding mixer.
+pub fn apply_true_peak_ceiling(samples: &mut [f32], ceiling_dbtp: Option<f64>) {
+    let Some(ceiling_dbtp) = ceiling_dbtp.filter(|value| value.is_finite()) else {
+        return;
+    };
+    let ceiling = 10.0_f32
+        .powf(((ceiling_dbtp - TRUE_PEAK_CODEC_SAFETY_DB).clamp(-120.0, 0.0) / 20.0) as f32);
+    for sample in samples {
+        *sample = sample.clamp(-ceiling, ceiling);
+    }
+}
 
 /// One audio clip's contribution to the mix: a mono f32 source window plus the
 /// per-sample gain to apply, laid down starting at `start_sample` on the shared
@@ -192,6 +211,16 @@ mod tests {
         assert_eq!(mix_clips(&[c]).unwrap(), vec![0.0, 0.5, 1.0]);
     }
 
+    #[test]
+    fn true_peak_ceiling_reserves_codec_reconstruction_margin() {
+        let mut samples = vec![1.0, -1.0, 0.25];
+        apply_true_peak_ceiling(&mut samples, Some(-1.0));
+        let expected = 10.0_f32.powf(-3.0 / 20.0);
+        assert!((samples[0] - expected).abs() < 1e-6);
+        assert!((samples[1] + expected).abs() < 1e-6);
+        assert_eq!(samples[2], 0.25);
+    }
+
     #[test]
     fn static_gain_helper_skips_envelope_at_unity() {
         let c = ClipAudio::with_static_gain(0, vec![0.4, 0.4], 1.0);
diff --git a/crates/opentake-media/src/encode/mod.rs b/crates/opentake-media/src/encode/mod.rs
index 9b871006..8ee4ef72 100644
--- a/crates/opentake-media/src/encode/mod.rs
+++ b/crates/opentake-media/src/encode/mod.rs
@@ -21,7 +21,7 @@ use std::thread::{self, JoinHandle};
 use std::time::Duration;
 
 use crate::cancel::MediaCancelToken;
-use crate::decode::pcm::PcmBuffer;
+use crate::decode::pcm::{PcmBuffer, PcmFormat, PcmSpec};
 use crate::error::{MediaError, Result};
 use crate::frame::RgbaFrame;
 
@@ -50,6 +50,10 @@ fn encode_args(out: &Path, w: u32, h: u32, fps: i32, preset: &ExportPreset) -> V
     args.push(preset.vcodec_arg().into());
     args.push("-pix_fmt".into());
     args.push(preset.pix_fmt_arg().into());
+    if preset.codec == VideoCodec::ProRes4444 {
+        args.push("-profile:v".into());
+        args.push("4444".into());
+    }
     args.extend(preset.color_args());
 
     args.push(out.to_string_lossy().into_owned());
@@ -117,10 +121,16 @@ pub struct VideoEncoder {
     first_pass: PathBuf,
     output: File,
     acodec: &'static str,
-    pending_audio: Option<PcmBuffer>,
+    pending_audio: Option<PendingAudio>,
     child_reaped: bool,
 }
 
+struct PendingAudio {
+    path: PathBuf,
+    spec: PcmSpec,
+    sample_count: u64,
+}
+
 impl VideoEncoder {
     /// Start an encoder writing to `out`. `w`/`h` must already be even.
     pub fn new(out: &Path, w: u32, h: u32, fps: i32, preset: &ExportPreset) -> Result<Self> {
@@ -149,7 +159,7 @@ impl VideoEncoder {
             <std::fs::Permissions as std::os::unix::fs::PermissionsExt>::from_mode(0o700),
         )
         .map_err(MediaError::Io)?;
-        let extension = if preset.codec == VideoCodec::ProRes422 {
+        let extension = if matches!(preset.codec, VideoCodec::ProRes422 | VideoCodec::ProRes4444) {
             "mov"
         } else {
             "mp4"
@@ -229,16 +239,81 @@ impl VideoEncoder {
         Ok(())
     }
 
-    /// Record the mixed-down mono audio buffer to mux on `finish`. The buffer's
-    /// `spec.sample_rate` is the rate ffmpeg is told to read the muxed PCM at
-    /// (the orchestrator decodes/mixes at [`MIX_SAMPLE_RATE`]). An empty buffer
-    /// is ignored — `finish` then keeps the video-only output.
-    pub fn push_audio(&mut self, pcm: PcmBuffer) {
+    /// Record one complete mixed-down mono audio buffer. Internally this uses
+    /// the same file-backed chunk sink as long-timeline export, so the encoder
+    /// never retains the caller's `Vec` until `finish`.
+    pub fn push_audio(&mut self, pcm: PcmBuffer) -> Result<()> {
+        if let Some(pending) = self.pending_audio.take() {
+            let _ = std::fs::remove_file(pending.path);
+        }
         if pcm.samples_f32.is_empty() {
-            self.pending_audio = None;
+            return Ok(());
+        }
+        self.push_audio_chunk(pcm.spec, &pcm.samples_f32, &MediaCancelToken::new())
+    }
+
+    /// Append one bounded mono f32 chunk to the private PCM spool used by the
+    /// final mux. The spool is file-backed, cancellable, and requires every
+    /// chunk to keep the same PCM contract.
+    pub fn push_audio_chunk(
+        &mut self,
+        spec: PcmSpec,
+        samples: &[f32],
+        cancel: &MediaCancelToken,
+    ) -> Result<()> {
+        if samples.is_empty() {
+            return Ok(());
+        }
+        if spec.channels != 1 || spec.format != PcmFormat::F32 || spec.sample_rate == 0 {
+            return Err(MediaError::Encode(
+                "streamed audio must be mono f32 at a positive sample rate".to_string(),
+            ));
+        }
+        let path = self.workspace.path().join("audio.pcm");
+        let mut output = if let Some(pending) = &self.pending_audio {
+            if pending.spec != spec {
+                return Err(MediaError::Encode(
+                    "streamed audio format changed between chunks".to_string(),
+                ));
+            }
+            OpenOptions::new()
+                .append(true)
+                .open(&pending.path)
+                .map_err(MediaError::Io)?
         } else {
-            self.pending_audio = Some(pcm);
+            OpenOptions::new()
+                .write(true)
+                .create_new(true)
+                .open(&path)
+                .map_err(MediaError::Io)?
+        };
+        for chunk in samples.chunks(OUTPUT_COPY_CHUNK / 2) {
+            if cancel.checkpoint() {
+                return Err(MediaError::Cancelled);
+            }
+            output
+                .write_all(&mix::mono_f32_to_s16le(chunk))
+                .map_err(MediaError::Io)?;
         }
+        output.flush().map_err(MediaError::Io)?;
+        let appended = u64::try_from(samples.len())
+            .map_err(|_| MediaError::Encode("streamed audio sample count overflow".to_string()))?;
+        match &mut self.pending_audio {
+            Some(pending) => {
+                pending.sample_count =
+                    pending.sample_count.checked_add(appended).ok_or_else(|| {
+                        MediaError::Encode("streamed audio sample count overflow".to_string())
+                    })?;
+            }
+            None => {
+                self.pending_audio = Some(PendingAudio {
+                    path,
+                    spec,
+                    sample_count: appended,
+                });
+            }
+        }
+        Ok(())
     }
 
     /// Abort a mid-stream encode (e.g. a user cancel): kill the ffmpeg child and
@@ -276,7 +351,7 @@ impl VideoEncoder {
         report_progress(progress, FIRST_PASS_END);
 
         match self.pending_audio.take() {
-            Some(pcm) => self.mux_audio(&pcm, cancel, progress, mux_wait_hook)?,
+            Some(audio) => self.mux_audio(&audio, cancel, progress, mux_wait_hook)?,
             None => self.copy_video_only(cancel, progress)?,
         };
         if cancel.checkpoint() {
@@ -397,20 +472,11 @@ impl VideoEncoder {
 
     fn mux_audio(
         &mut self,
-        pcm: &PcmBuffer,
+        audio: &PendingAudio,
         cancel: &MediaCancelToken,
         progress: Option<&EncodeProgressCallback>,
         mux_wait_hook: Option<&dyn Fn()>,
     ) -> Result<()> {
-        let pcm_path = self.workspace.path().join("audio.pcm");
-        let mut pcm_tmp = OpenOptions::new()
-            .read(true)
-            .write(true)
-            .create_new(true)
-            .open(&pcm_path)
-            .map_err(MediaError::Io)?;
-        write_pcm_s16le_cancellable(&pcm.samples_f32, &mut pcm_tmp, cancel, progress, None)?;
-        pcm_tmp.flush().map_err(MediaError::Io)?;
         report_progress(progress, PCM_WRITE_END);
 
         let mux_path = self.workspace.path().join(
@@ -427,9 +493,9 @@ impl VideoEncoder {
         );
         let args = mux_args(
             &self.first_pass,
-            &pcm_path,
+            &audio.path,
             &mux_path,
-            pcm.spec.sample_rate,
+            audio.spec.sample_rate,
             self.acodec,
         );
         let mut child = crate::ff::ffmpeg()
@@ -572,6 +638,7 @@ fn drain_stderr(mut stderr: ChildStderr) -> Result<()> {
     }
 }
 
+#[cfg(test)]
 fn write_pcm_s16le_cancellable(
     samples: &[f32],
     destination: &mut File,
@@ -679,6 +746,36 @@ mod tests {
             .is_ok_and(|status| status.success())
     }
 
+    #[test]
+    fn audio_chunks_spool_incrementally_without_retaining_the_timeline_mix() {
+        assert!(crate::ff::ffmpeg_available(), "test requires FFmpeg");
+        let temp = tempfile::tempdir().unwrap();
+        let output = temp.path().join("chunked.mp4");
+        let preset = ExportPreset::new(VideoCodec::H264, ExportResolution::P720);
+        let mut encoder = VideoEncoder::new(&output, 2, 2, 1, &preset).unwrap();
+        encoder
+            .push_frame(&RgbaFrame::new(2, 2, vec![0; 2 * 2 * 4]))
+            .unwrap();
+        let spec = PcmSpec {
+            sample_rate: 48_000,
+            channels: 1,
+            format: PcmFormat::F32,
+        };
+        let cancel = MediaCancelToken::new();
+        encoder
+            .push_audio_chunk(spec, &[0.25, -0.25], &cancel)
+            .unwrap();
+        encoder
+            .push_audio_chunk(spec, &[0.5, -0.5], &cancel)
+            .unwrap();
+        let pending = encoder.pending_audio.as_ref().unwrap();
+        assert_eq!(pending.sample_count, 4);
+        assert_eq!(std::fs::metadata(&pending.path).unwrap().len(), 8);
+
+        encoder.finish().unwrap();
+        assert!(output.is_file());
+    }
+
     #[cfg(unix)]
     #[test]
     fn dropping_live_encoder_reaps_child_and_releases_output() {
@@ -747,13 +844,24 @@ mod tests {
     }
 
     #[test]
-    fn encode_args_prores_pixfmt_and_no_color_tag() {
+    fn encode_args_prores_pixfmt_and_bt709_delivery_tags() {
         let preset = ExportPreset::new(VideoCodec::ProRes422, ExportResolution::P2160);
         let args = encode_args(Path::new("/o.mov"), 3840, 2160, 30, &preset);
         assert!(args.windows(2).any(|w| w == ["-c:v", "prores_ks"]));
         assert!(args.windows(2).any(|w| w == ["-pix_fmt", "yuv422p10le"]));
-        // ProRes path does not add BT.709 color tags here.
-        assert!(!args.windows(2).any(|w| w == ["-colorspace", "bt709"]));
+        assert!(args.windows(2).any(|w| w == ["-colorspace", "bt709"]));
+        assert!(args
+            .iter()
+            .any(|arg| arg.contains("setparams=color_primaries=bt709")));
+    }
+
+    #[test]
+    fn encode_args_prores_4444_preserve_alpha() {
+        let preset = ExportPreset::new(VideoCodec::ProRes4444, ExportResolution::P1080);
+        let args = encode_args(Path::new("/matte.mov"), 1920, 1080, 30, &preset);
+        assert!(args.windows(2).any(|w| w == ["-c:v", "prores_ks"]));
+        assert!(args.windows(2).any(|w| w == ["-pix_fmt", "yuva444p10le"]));
+        assert!(args.windows(2).any(|w| w == ["-profile:v", "4444"]));
     }
 
     #[test]
diff --git a/crates/opentake-media/src/encode/preset.rs b/crates/opentake-media/src/encode/preset.rs
index 8c669cd5..3ef0e75a 100644
--- a/crates/opentake-media/src/encode/preset.rs
+++ b/crates/opentake-media/src/encode/preset.rs
@@ -9,6 +9,8 @@ pub enum VideoCodec {
     H264,
     H265,
     ProRes422,
+    /// ProRes 4444 with an alpha plane for local generated derivatives.
+    ProRes4444,
 }
 
 /// Short-edge target resolution.
@@ -48,6 +50,7 @@ impl ExportPreset {
             VideoCodec::H264 => "libx264",
             VideoCodec::H265 => "libx265",
             VideoCodec::ProRes422 => "prores_ks",
+            VideoCodec::ProRes4444 => "prores_ks",
         }
     }
 
@@ -55,7 +58,7 @@ impl ExportPreset {
     /// AAC (upstream presets).
     pub fn acodec_arg(&self) -> &'static str {
         match self.codec {
-            VideoCodec::ProRes422 => "pcm_s16le",
+            VideoCodec::ProRes422 | VideoCodec::ProRes4444 => "pcm_s16le",
             _ => "aac",
         }
     }
@@ -65,24 +68,27 @@ impl ExportPreset {
     pub fn pix_fmt_arg(&self) -> &'static str {
         match self.codec {
             VideoCodec::ProRes422 => "yuv422p10le",
+            VideoCodec::ProRes4444 => "yuva444p10le",
             _ => "yuv420p",
         }
     }
 
-    /// BT.709 color-tagging args (primaries/transfer/matrix), applied for the
-    /// H.26x lossy codecs to match upstream's locked BT.709 pipeline.
+    /// BT.709 delivery tagging. `setparams` writes all three properties onto
+    /// every frame before the encoder sees it; the stream flags are retained as
+    /// an explicit container/codec request. This combination is required by
+    /// current FFmpeg/libx264, where stream flags alone leave primaries and
+    /// transfer as `unknown` in the produced bitstream.
     pub fn color_args(&self) -> Vec<String> {
-        match self.codec {
-            VideoCodec::ProRes422 => vec![],
-            _ => vec![
-                "-colorspace".into(),
-                "bt709".into(),
-                "-color_primaries".into(),
-                "bt709".into(),
-                "-color_trc".into(),
-                "bt709".into(),
-            ],
-        }
+        vec![
+            "-vf".into(),
+            "setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709".into(),
+            "-colorspace".into(),
+            "bt709".into(),
+            "-color_primaries".into(),
+            "bt709".into(),
+            "-color_trc".into(),
+            "bt709".into(),
+        ]
     }
 }
 
@@ -116,10 +122,15 @@ mod tests {
         assert_eq!(prores.vcodec_arg(), "prores_ks");
         assert_eq!(prores.acodec_arg(), "pcm_s16le"); // LPCM
         assert_eq!(prores.pix_fmt_arg(), "yuv422p10le");
+
+        let alpha = ExportPreset::new(VideoCodec::ProRes4444, ExportResolution::P1080);
+        assert_eq!(alpha.vcodec_arg(), "prores_ks");
+        assert_eq!(alpha.acodec_arg(), "pcm_s16le");
+        assert_eq!(alpha.pix_fmt_arg(), "yuva444p10le");
     }
 
     #[test]
-    fn h26x_get_bt709_color_args_prores_does_not() {
+    fn every_delivery_codec_gets_bt709_frame_and_stream_tags() {
         let h265 = ExportPreset::new(VideoCodec::H265, ExportResolution::P720);
         let args = h265.color_args();
         assert!(args.windows(2).any(|w| w == ["-colorspace", "bt709"]));
@@ -127,7 +138,10 @@ mod tests {
         assert!(args.windows(2).any(|w| w == ["-color_trc", "bt709"]));
 
         let prores = ExportPreset::new(VideoCodec::ProRes422, ExportResolution::P720);
-        assert!(prores.color_args().is_empty());
+        assert!(prores
+            .color_args()
+            .iter()
+            .any(|arg| arg.contains("setparams=color_primaries=bt709")));
     }
 
     #[test]
diff --git a/crates/opentake-media/src/ff.rs b/crates/opentake-media/src/ff.rs
index 4bfcb91b..b6229ba1 100644
--- a/crates/opentake-media/src/ff.rs
+++ b/crates/opentake-media/src/ff.rs
@@ -1,4 +1,5 @@
-//! Thin internal helpers for driving the system `ffmpeg`/`ffprobe` binaries.
+//! Thin internal helpers for driving bundled or development `ffmpeg`/`ffprobe`
+//! binaries.
 //!
 //! We deliberately do **not** link libav*: the local toolchain is ffmpeg 8.1
 //! (libavcodec 62) which the C-binding crates do not support, and pkg-config is
@@ -6,23 +7,86 @@
 //! binary discovery and one-shot ffprobe JSON queries so the higher-level decode
 //! modules stay readable.
 //!
-//! Environment overrides `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE` let callers (and
-//! packaged builds) point at a bundled binary.
+//! Packaged binaries live beside the OpenTake executable. Environment overrides
+//! `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE` remain available to tests and
+//! development tools; the desktop shell pins them to the bundled sidecars before
+//! media initialization.
 
 use std::ffi::OsString;
 use std::io::{Seek, SeekFrom};
+use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 
 use ffmpeg_sidecar::command::FfmpegCommand;
 
-/// Path to the `ffmpeg` binary: `$OPENTAKE_FFMPEG`, else `ffmpeg` on `PATH`.
+fn sidecar_filename(binary: &str) -> String {
+    if cfg!(windows) {
+        format!("{binary}.exe")
+    } else {
+        binary.to_string()
+    }
+}
+
+/// Return a regular, non-symlink sidecar next to `executable`.
+///
+/// Keeping this pure helper separate makes the packaged-path security boundary
+/// deterministic to test without mutating the process executable or PATH.
+pub fn packaged_sidecar_beside(executable: &Path, binary: &str) -> Option<PathBuf> {
+    let parent = executable.parent()?;
+    let candidate = parent.join(sidecar_filename(binary));
+    let metadata = std::fs::symlink_metadata(&candidate).ok()?;
+    if metadata.file_type().is_file() && !metadata.file_type().is_symlink() {
+        Some(candidate)
+    } else {
+        None
+    }
+}
+
+/// Find a verified-by-the-package-manager sidecar beside the current executable.
+/// Runtime code still checks that the path is a regular file; the build/package
+/// pipeline owns its pinned SHA-256 and version verification.
+pub fn packaged_sidecar_path(binary: &str) -> Option<PathBuf> {
+    let executable = std::env::current_exe().ok()?;
+    packaged_sidecar_beside(&executable, binary)
+}
+
+/// Resolve one CLI tool without mutating global process state in tests.
+///
+/// An explicit override always wins, then a regular non-symlink packaged
+/// sidecar beside the executable, and finally the platform command name on
+/// `PATH`.
+fn resolve_cli_path(
+    override_path: Option<OsString>,
+    executable: Option<&Path>,
+    binary: &str,
+) -> OsString {
+    override_path
+        .or_else(|| {
+            executable
+                .and_then(|path| packaged_sidecar_beside(path, binary))
+                .map(PathBuf::into_os_string)
+        })
+        .unwrap_or_else(|| OsString::from(binary))
+}
+
+/// Path to `ffmpeg`: explicit development override, packaged sidecar, then PATH.
 pub fn ffmpeg_path() -> OsString {
-    std::env::var_os("OPENTAKE_FFMPEG").unwrap_or_else(|| OsString::from("ffmpeg"))
+    let executable = std::env::current_exe().ok();
+    resolve_cli_path(
+        std::env::var_os("OPENTAKE_FFMPEG"),
+        executable.as_deref(),
+        "ffmpeg",
+    )
 }
 
-/// Path to the `ffprobe` binary: `$OPENTAKE_FFPROBE`, else `ffprobe` on `PATH`.
+/// Path to `ffprobe`: explicit development override, packaged sidecar, then PATH.
 pub fn ffprobe_path() -> OsString {
-    std::env::var_os("OPENTAKE_FFPROBE").unwrap_or_else(|| OsString::from("ffprobe"))
+    let executable = std::env::current_exe().ok();
+    resolve_cli_path(
+        std::env::var_os("OPENTAKE_FFPROBE"),
+        executable.as_deref(),
+        "ffprobe",
+    )
 }
 
 /// A fresh `FfmpegCommand` bound to [`ffmpeg_path`].
@@ -114,17 +178,69 @@ mod tests {
 
     #[test]
     fn env_override_is_respected_for_ffmpeg() {
-        // We can't safely mutate process env in parallel tests for the *default*,
-        // but we can assert the default value when the var is unset in this proc.
-        if std::env::var_os("OPENTAKE_FFMPEG").is_none() {
-            assert_eq!(ffmpeg_path(), OsString::from("ffmpeg"));
-        }
+        let temp = tempfile::tempdir().unwrap();
+        let executable = temp.path().join(if cfg!(windows) {
+            "opentake.exe"
+        } else {
+            "opentake"
+        });
+        std::fs::write(&executable, b"app").unwrap();
+        std::fs::write(temp.path().join(sidecar_filename("ffmpeg")), b"sidecar").unwrap();
+
+        assert_eq!(
+            resolve_cli_path(
+                Some(OsString::from("/opt/opentake/custom-ffmpeg")),
+                Some(&executable),
+                "ffmpeg",
+            ),
+            OsString::from("/opt/opentake/custom-ffmpeg"),
+        );
     }
 
     #[test]
     fn default_ffprobe_is_ffprobe() {
-        if std::env::var_os("OPENTAKE_FFPROBE").is_none() {
-            assert_eq!(ffprobe_path(), OsString::from("ffprobe"));
-        }
+        assert_eq!(
+            resolve_cli_path(None, None, "ffprobe"),
+            OsString::from("ffprobe")
+        );
+    }
+
+    #[test]
+    fn packaged_sidecar_must_be_regular_and_beside_executable() {
+        let temp = tempfile::tempdir().unwrap();
+        let executable = temp.path().join(if cfg!(windows) {
+            "opentake.exe"
+        } else {
+            "opentake"
+        });
+        std::fs::write(&executable, b"app").unwrap();
+        let sidecar = temp.path().join(sidecar_filename("ffmpeg"));
+        std::fs::write(&sidecar, b"sidecar").unwrap();
+
+        assert_eq!(
+            packaged_sidecar_beside(&executable, "ffmpeg"),
+            Some(sidecar.clone())
+        );
+        assert_eq!(
+            resolve_cli_path(None, Some(&executable), "ffmpeg"),
+            sidecar.into_os_string()
+        );
+        assert_eq!(packaged_sidecar_beside(&executable, "ffprobe"), None);
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn packaged_sidecar_rejects_symlink() {
+        use std::os::unix::fs::symlink;
+
+        let temp = tempfile::tempdir().unwrap();
+        let executable = temp.path().join("opentake");
+        let outside = temp.path().join("outside");
+        let sidecar = temp.path().join("ffmpeg");
+        std::fs::write(&executable, b"app").unwrap();
+        std::fs::write(&outside, b"untrusted").unwrap();
+        symlink(&outside, &sidecar).unwrap();
+
+        assert_eq!(packaged_sidecar_beside(&executable, "ffmpeg"), None);
     }
 }
diff --git a/crates/opentake-media/src/index_coordinator.rs b/crates/opentake-media/src/index_coordinator.rs
index bb49dee0..15ca5e60 100644
--- a/crates/opentake-media/src/index_coordinator.rs
+++ b/crates/opentake-media/src/index_coordinator.rs
@@ -17,7 +17,8 @@
 
 use std::path::Path;
 use std::sync::atomic::{AtomicUsize, Ordering};
-use std::sync::Arc;
+use std::sync::{Arc, Condvar, Mutex};
+use std::time::Duration;
 
 use opentake_domain::media::MediaAsset;
 use opentake_domain::ClipType;
@@ -29,8 +30,21 @@ use crate::transcribe::cache::has_cached_on_disk;
 /// Cross-window reference-counted export-active flag. Background work yields
 /// while the count is non-zero. Port of `ExportPauseCounter`
 /// (`SearchIndexCoordinator.swift:37-47`).
+#[derive(Default)]
+struct ExportPauseInner {
+    active: AtomicUsize,
+    changed: Condvar,
+    gate: Mutex<()>,
+}
+
 #[derive(Clone, Default)]
-pub struct ExportPause(Arc<AtomicUsize>);
+pub struct ExportPause(Arc<ExportPauseInner>);
+
+/// Balanced playback/export pressure holder. Dropping the final guard wakes
+/// every blocked background worker, including early-return and unwind paths.
+pub struct ExportPauseGuard {
+    pause: ExportPause,
+}
 
 impl ExportPause {
     pub fn new() -> Self {
@@ -38,19 +52,56 @@ impl ExportPause {
     }
     /// Mark an export as begun (increment).
     pub fn begin(&self) {
-        self.0.fetch_add(1, Ordering::SeqCst);
+        self.0.active.fetch_add(1, Ordering::SeqCst);
     }
     /// Mark an export as ended (decrement; saturating at 0).
     pub fn end(&self) {
-        let _ = self
+        let previous = self
             .0
+            .active
             .fetch_update(Ordering::SeqCst, Ordering::SeqCst, |v| {
                 Some(v.saturating_sub(1))
             });
+        if matches!(previous, Ok(1)) {
+            self.0.changed.notify_all();
+        }
     }
     /// True while any export is active.
     pub fn is_active(&self) -> bool {
-        self.0.load(Ordering::SeqCst) > 0
+        self.0.active.load(Ordering::SeqCst) > 0
+    }
+
+    /// Begin pressure and return an unwind-safe, automatically balanced guard.
+    pub fn guard(&self) -> ExportPauseGuard {
+        self.begin();
+        ExportPauseGuard {
+            pause: self.clone(),
+        }
+    }
+
+    /// Block until playback/export pressure clears. The cancellation predicate
+    /// is checked at short intervals so shutdown and job cancellation cannot be
+    /// stranded behind a missing `end`. Returns `false` when cancelled.
+    pub fn wait_while_active(&self, cancelled: impl Fn() -> bool) -> bool {
+        let mut gate = self.0.gate.lock().unwrap_or_else(|e| e.into_inner());
+        while self.is_active() {
+            if cancelled() {
+                return false;
+            }
+            let (next, _) = self
+                .0
+                .changed
+                .wait_timeout(gate, Duration::from_millis(20))
+                .unwrap_or_else(|e| e.into_inner());
+            gate = next;
+        }
+        !cancelled()
+    }
+}
+
+impl Drop for ExportPauseGuard {
+    fn drop(&mut self) {
+        self.pause.end();
     }
 }
 
@@ -135,6 +186,30 @@ mod tests {
         // saturating: extra end stays at 0.
         p.end();
         assert!(!p.is_active());
+
+        // A guard makes every early-return path balanced, and a blocked worker
+        // wakes promptly once the final nested holder leaves.
+        let outer = p.guard();
+        let inner = p.guard();
+        let waiter_pause = p.clone();
+        let (tx, rx) = std::sync::mpsc::channel();
+        let waiter = std::thread::spawn(move || {
+            tx.send(waiter_pause.wait_while_active(|| false)).unwrap();
+        });
+        assert!(rx
+            .recv_timeout(std::time::Duration::from_millis(25))
+            .is_err());
+        drop(inner);
+        assert!(rx
+            .recv_timeout(std::time::Duration::from_millis(25))
+            .is_err());
+        drop(outer);
+        assert!(rx.recv_timeout(std::time::Duration::from_secs(1)).unwrap());
+        waiter.join().unwrap();
+
+        p.begin();
+        assert!(!p.wait_while_active(|| true));
+        p.end();
     }
 
     #[test]
diff --git a/crates/opentake-media/src/lib.rs b/crates/opentake-media/src/lib.rs
index 3d42d1b5..e9ac24b6 100644
--- a/crates/opentake-media/src/lib.rs
+++ b/crates/opentake-media/src/lib.rs
@@ -2,7 +2,7 @@
 //!
 //! Ports PalmierPro's AVFoundation / DSWaveformImage / macOS-Speech / CoreML
 //! media stack to cross-platform Rust:
-//! - **probe / decode / encode**: system ffmpeg CLI via [`ff`] (no libav* link).
+//! - **probe / decode / encode**: packaged/development ffmpeg CLI via [`ff`] (no libav* link).
 //! - **thumbnails**: seek-decode + JPEG sprite-grid disk cache.
 //! - **waveform**: Symphonia PCM decode → RMS downsample → normalized buckets.
 //! - **transcribe**: `Transcriber` trait (+ data model, locale, cache, search);
@@ -20,15 +20,40 @@
 //! ## Why ffmpeg over the CLI
 //! The local toolchain is ffmpeg 8.1 (libavcodec 62), which the C-binding crates
 //! (`ffmpeg-next` / `ffmpeg-the-third`) do not support, and `pkg-config` is
-//! absent. `ffmpeg-sidecar` drives the binaries on `PATH` — zero native linkage
-//! and a clean cross-platform build — so it is the chosen backend (SPEC §1.2,
+//! absent. `ffmpeg-sidecar` drives checksum-pinned packaged binaries (or PATH in
+//! development only) — zero native linkage and a clean cross-platform build —
+//! so it is the chosen backend (SPEC §1.2,
 //! "若 ffmpeg-next 不支持 8.x … 改用 ffmpeg-sidecar").
 
 mod ff;
 
+#[cfg(all(feature = "ort-backend", target_os = "windows"))]
+pub(crate) fn initialize_ort_backend() {
+    static INITIALIZE: std::sync::Once = std::sync::Once::new();
+    INITIALIZE.call_once(|| {
+        assert!(
+            ort::set_api(ort_tract::api()),
+            "ort API was initialized before the Windows tract backend"
+        );
+    });
+}
+
+#[cfg(all(feature = "ort-backend", not(target_os = "windows")))]
+pub(crate) fn initialize_ort_backend() {}
+
+#[cfg(all(test, feature = "ort-backend", target_os = "windows"))]
+mod windows_ort_backend_tests {
+    #[test]
+    fn tract_backend_initializes_before_ort_session_use() {
+        crate::initialize_ort_backend();
+        ort::session::Session::builder().expect("tract must provide the ort session API");
+    }
+}
+
 pub mod analysis;
 pub mod cache_key;
 pub mod cancel;
+pub mod color;
 pub mod decode;
 pub mod encode;
 pub mod error;
@@ -37,6 +62,7 @@ pub mod index_coordinator;
 pub mod library;
 pub mod ort_worker;
 pub mod probe;
+pub mod proxy;
 pub mod search;
 pub mod thumbnail;
 pub mod timecode;
@@ -123,13 +149,17 @@ pub use cancel::MediaCancelToken;
 pub use error::{MediaError, Result};
 pub use frame::RgbaFrame;
 
-pub use probe::{probe, MediaProbe};
+pub use color::{hdr_decode_input_args, hdr_tonemap_filter};
+pub use probe::{parse_probe, probe, MediaProbe};
+pub use proxy::{create_proxy, file_sha256, ProxyProgressCallback, ProxyRequest, ProxyResult};
 
 pub use decode::{
-    decode_frame_at, decode_frame_at_cancellable, decode_frames_at, decode_frames_at_cancellable,
-    decode_pcm_interleaved, decode_pcm_interleaved_cancellable, extract_pcm,
-    extract_pcm_cancellable, extract_pcm_cancellable_with_progress, FrameRequest, PcmBuffer,
-    PcmFormat, PcmProgressCallback, PcmSpec, StreamDecodeControl, StreamVideoFrame, VideoStream,
+    convert_frame_rate, decode_frame_at, decode_frame_at_cancellable, decode_frames_at,
+    decode_frames_at_cancellable, decode_pcm_interleaved, decode_pcm_interleaved_cancellable,
+    extract_pcm, extract_pcm_cancellable, extract_pcm_cancellable_with_progress,
+    interpolate_frame_pair, FrameInterpolationFallback, FrameInterpolationMode,
+    FrameInterpolationResult, FrameRateSample, FrameRequest, PcmBuffer, PcmFormat,
+    PcmProgressCallback, PcmSpec, StreamDecodeControl, StreamVideoFrame, VideoStream,
     VideoStreamRequest, DEFAULT_VIDEO_STREAM_QUEUE_CAPACITY,
 };
 
@@ -168,8 +198,8 @@ pub use transcribe::{
 pub use transcribe::whisper::WhisperTranscriber;
 
 pub use search::{
-    rank as search_visual_ranked, AssetIndex, CancelToken, Embedder, EmbedderSpec, Hit,
-    SamplerOptions,
+    rank as search_visual_ranked, AssetIndex, CancelToken, Embedder, EmbedderSpec, Header, Hit,
+    Row, SamplerOptions,
 };
 
 pub use index_coordinator::{work_needed, ExportPause, IndexProgress, WorkNeeded};
@@ -179,7 +209,10 @@ pub use ort_worker::ExecutionProvider;
 /// ffmpeg/ffprobe availability probes (re-exported for integration tests and
 /// host-capability checks).
 pub mod ffmpeg_status {
-    pub use crate::ff::{ffmpeg_available, ffprobe_available};
+    pub use crate::ff::{
+        ffmpeg_available, ffmpeg_path, ffprobe_available, packaged_sidecar_beside,
+        packaged_sidecar_path,
+    };
 }
 
 /// Facade bundling the media engine's roots for `opentake-core` (SPEC §8.4).
@@ -221,6 +254,33 @@ impl MediaEngine {
         probe::probe_file(file)
     }
 
+    /// Decode the nearest source frame for preview/render materialization.
+    pub fn decode_frame(&self, path: &Path, request: &FrameRequest) -> Result<(f64, RgbaFrame)> {
+        decode::decode_frame_at(path, request)
+    }
+
+    /// Decode the first audio track into the requested PCM contract.
+    pub fn extract_pcm(
+        &self,
+        path: &Path,
+        spec: &PcmSpec,
+        range: Option<(f64, f64)>,
+    ) -> Result<PcmBuffer> {
+        decode::extract_pcm(path, spec, range)
+    }
+
+    /// Start the streaming encoder used by the render/export adapter.
+    pub fn video_encoder(
+        &self,
+        output: &Path,
+        width: u32,
+        height: u32,
+        fps: i32,
+        preset: &ExportPreset,
+    ) -> Result<VideoEncoder> {
+        encode::VideoEncoder::new(output, width, height, fps, preset)
+    }
+
     /// Generate (and cache) a video thumbnail sequence.
     pub fn video_thumbnails(
         &self,
@@ -263,6 +323,20 @@ impl MediaEngine {
         transcribe::search::search(&self.cache_root, query, assets, limit)
     }
 
+    /// Rank one encoded visual query against caller-owned current index
+    /// snapshots. Model loading/text encoding stay in the bounded worker; this
+    /// facade owns the deterministic index/ranking boundary.
+    pub fn search_visual(
+        &self,
+        query_vector: &[f32],
+        indexes: &[(String, AssetIndex)],
+        limit: usize,
+        relative_cutoff: f32,
+        min_score: Option<f32>,
+    ) -> Vec<Hit> {
+        search::rank(query_vector, indexes, limit, relative_cutoff, min_score)
+    }
+
     /// The shared export-pause signal; `opentake-render` calls `begin`/`end`
     /// around exports so background indexing yields.
     pub fn export_pause(&self) -> ExportPause {
@@ -379,6 +453,13 @@ mod tests {
         let _: Option<Hit> = None;
         let _ = PcmFormat::F32;
         let _ = VideoCodec::H264;
+
+        // The high-level facade owns every service family as methods; callers
+        // do not need to assemble the flat modules themselves.
+        let _ = MediaEngine::decode_frame;
+        let _ = MediaEngine::extract_pcm;
+        let _ = MediaEngine::video_encoder;
+        let _ = MediaEngine::search_visual;
     }
 
     // --- extract_audio codec selection (Issue #39 review #3) ---
diff --git a/crates/opentake-media/src/ort_worker/mod.rs b/crates/opentake-media/src/ort_worker/mod.rs
index 47868623..c0d1a766 100644
--- a/crates/opentake-media/src/ort_worker/mod.rs
+++ b/crates/opentake-media/src/ort_worker/mod.rs
@@ -13,7 +13,7 @@ pub mod tensor;
 pub use tensor::{frame_to_hwc, hwc_to_nchw_normalized, mean_pool};
 
 /// Execution provider preference; the loader falls back to CPU when an
-/// accelerator is unavailable.
+/// accelerator is unavailable. Windows ships the pure-Rust tract CPU backend.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum ExecutionProvider {
     Cpu,
@@ -24,8 +24,8 @@ pub enum ExecutionProvider {
 }
 
 impl ExecutionProvider {
-    /// The platform-preferred provider (CoreML on macOS, DirectML on Windows,
-    /// CUDA on Linux), used as the first choice before CPU fallback.
+    /// The platform-preferred provider (CoreML on macOS, CPU tract on Windows,
+    /// CPU on Linux), used as the first choice before CPU fallback.
     pub fn platform_default() -> Self {
         #[cfg(target_os = "macos")]
         {
@@ -33,7 +33,7 @@ impl ExecutionProvider {
         }
         #[cfg(target_os = "windows")]
         {
-            ExecutionProvider::DirectMl
+            ExecutionProvider::Cpu
         }
         #[cfg(all(not(target_os = "macos"), not(target_os = "windows")))]
         {
@@ -66,6 +66,532 @@ pub struct IoSpec {
     pub outputs: Vec<IoTensor>,
 }
 
+use std::any::Any;
+use std::collections::HashMap;
+use std::marker::PhantomData;
+use std::sync::atomic::{AtomicBool, AtomicU64, AtomicUsize, Ordering};
+use std::sync::mpsc::{self, Receiver, SyncSender, TryRecvError, TrySendError};
+use std::sync::{Arc, Condvar, Mutex, Weak};
+use std::thread::JoinHandle;
+use std::time::{Duration, Instant};
+
+use crate::index_coordinator::ExportPause;
+use crate::search::CancelToken;
+
+/// The production operation class carried with every queued job.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum JobKind {
+    Index,
+    Transcribe,
+    Search,
+}
+
+/// Scheduling priority. Playback/export does not enter this queue: its shared
+/// [`ExportPause`] gate prevents new jobs from starting at batch boundaries.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub enum JobPriority {
+    Background,
+    Interactive,
+}
+
+/// Stable identity used for observability, prioritisation, and deduplication.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct JobRequest {
+    pub kind: JobKind,
+    pub model_identity: String,
+    pub dedupe_key: String,
+    pub priority: JobPriority,
+}
+
+impl JobRequest {
+    pub fn new(
+        kind: JobKind,
+        model_identity: impl Into<String>,
+        dedupe_key: impl Into<String>,
+        priority: JobPriority,
+    ) -> Self {
+        Self {
+            kind,
+            model_identity: model_identity.into(),
+            dedupe_key: dedupe_key.into(),
+            priority,
+        }
+    }
+}
+
+/// Consumer-visible lifecycle. Every accepted job reaches exactly one terminal
+/// state even when its task returns an error or panics.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum JobState {
+    Queued,
+    Running,
+    Cancelled,
+    Completed,
+    Failed,
+}
+
+/// Typed queue/result failures. Model and job errors remain recoverable: the
+/// single worker continues serving the next request.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum WorkerError {
+    QueueFull,
+    Cancelled,
+    Shutdown,
+    Panicked,
+    Model(String),
+    Job(String),
+    ResultType,
+}
+
+impl std::fmt::Display for WorkerError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::QueueFull => f.write_str("inference queue is full"),
+            Self::Cancelled => f.write_str("inference job was cancelled"),
+            Self::Shutdown => f.write_str("inference worker is shut down"),
+            Self::Panicked => f.write_str("inference job panicked"),
+            Self::Model(message) => write!(f, "model error: {message}"),
+            Self::Job(message) => write!(f, "job error: {message}"),
+            Self::ResultType => f.write_str("inference result type mismatch"),
+        }
+    }
+}
+
+impl std::error::Error for WorkerError {}
+
+type ErasedResult = Arc<dyn Any + Send + Sync>;
+type JobTask = Box<
+    dyn FnOnce(&OrtModelRegistry, &CancelToken) -> Result<ErasedResult, WorkerError>
+        + Send
+        + 'static,
+>;
+
+struct JobStatus {
+    state: JobState,
+    result: Option<Result<ErasedResult, WorkerError>>,
+}
+
+struct SharedJob {
+    request: JobRequest,
+    cancel: CancelToken,
+    status: Mutex<JobStatus>,
+    changed: Condvar,
+}
+
+impl SharedJob {
+    fn new(request: JobRequest) -> Self {
+        Self {
+            request,
+            cancel: CancelToken::new(),
+            status: Mutex::new(JobStatus {
+                state: JobState::Queued,
+                result: None,
+            }),
+            changed: Condvar::new(),
+        }
+    }
+
+    fn set_running(&self) -> bool {
+        let mut status = self.status.lock().unwrap_or_else(|e| e.into_inner());
+        if self.cancel.is_cancelled() {
+            false
+        } else {
+            status.state = JobState::Running;
+            self.changed.notify_all();
+            true
+        }
+    }
+
+    fn finish(&self, result: Result<ErasedResult, WorkerError>) {
+        let mut status = self.status.lock().unwrap_or_else(|e| e.into_inner());
+        status.state = match &result {
+            Ok(_) => JobState::Completed,
+            Err(WorkerError::Cancelled) => JobState::Cancelled,
+            Err(_) => JobState::Failed,
+        };
+        status.result = Some(result);
+        self.changed.notify_all();
+    }
+}
+
+struct QueuedJob {
+    sequence: u64,
+    shared: Arc<SharedJob>,
+    task: Option<JobTask>,
+}
+
+enum WorkerMessage {
+    Job(QueuedJob),
+    Shutdown,
+}
+
+struct WorkerInner {
+    sender: SyncSender<WorkerMessage>,
+    dedupe: Mutex<HashMap<String, Weak<SharedJob>>>,
+    capacity: usize,
+    queued: AtomicUsize,
+    sequence: AtomicU64,
+    active: AtomicUsize,
+    shutdown: AtomicBool,
+    thread: Mutex<Option<JoinHandle<()>>>,
+}
+
+/// A bounded, single-thread heavy-inference executor. Its queue is shared by
+/// indexing, transcription, and semantic-search callers; jobs carry model and
+/// source identities, deduplicate while live, and yield to playback/export.
+#[derive(Clone)]
+pub struct OrtWorker {
+    inner: Arc<WorkerInner>,
+}
+
+/// Typed view of one accepted (or deduplicated) job.
+pub struct JobHandle<T> {
+    shared: Arc<SharedJob>,
+    marker: PhantomData<T>,
+}
+
+impl<T> Clone for JobHandle<T> {
+    fn clone(&self) -> Self {
+        Self {
+            shared: self.shared.clone(),
+            marker: PhantomData,
+        }
+    }
+}
+
+impl<T> JobHandle<T>
+where
+    T: Clone + Send + Sync + 'static,
+{
+    pub fn state(&self) -> JobState {
+        self.shared
+            .status
+            .lock()
+            .unwrap_or_else(|e| e.into_inner())
+            .state
+    }
+
+    pub fn cancel(&self) {
+        self.shared.cancel.cancel();
+    }
+
+    pub fn wait(&self) -> Result<T, WorkerError> {
+        let mut status = self.shared.status.lock().unwrap_or_else(|e| e.into_inner());
+        while status.result.is_none() {
+            status = self
+                .shared
+                .changed
+                .wait(status)
+                .unwrap_or_else(|e| e.into_inner());
+        }
+        match status.result.as_ref().expect("result checked above") {
+            Ok(value) => value
+                .downcast_ref::<T>()
+                .cloned()
+                .ok_or(WorkerError::ResultType),
+            Err(error) => Err(error.clone()),
+        }
+    }
+
+    pub fn wait_until_running(&self, timeout: Duration) -> Result<(), WorkerError> {
+        let deadline = Instant::now() + timeout;
+        let mut status = self.shared.status.lock().unwrap_or_else(|e| e.into_inner());
+        loop {
+            match status.state {
+                JobState::Running => return Ok(()),
+                JobState::Cancelled => return Err(WorkerError::Cancelled),
+                JobState::Failed | JobState::Completed => {
+                    return Err(WorkerError::Job(
+                        "job finished before it was observed running".into(),
+                    ))
+                }
+                JobState::Queued => {}
+            }
+            let now = Instant::now();
+            if now >= deadline {
+                return Err(WorkerError::Job(
+                    "timed out waiting for running state".into(),
+                ));
+            }
+            let (next, timed) = self
+                .shared
+                .changed
+                .wait_timeout(status, deadline - now)
+                .unwrap_or_else(|e| e.into_inner());
+            status = next;
+            if timed.timed_out() && status.state != JobState::Running {
+                return Err(WorkerError::Job(
+                    "timed out waiting for running state".into(),
+                ));
+            }
+        }
+    }
+}
+
+/// Single-worker model cache. A worker task can lazily install a typed model by
+/// stable identity; subsequent jobs reuse the exact `Arc` without a second load.
+#[derive(Default)]
+pub struct OrtModelRegistry {
+    models: Mutex<HashMap<String, ErasedResult>>,
+}
+
+impl OrtModelRegistry {
+    pub fn get_or_try_init<T, F>(&self, key: &str, load: F) -> Result<Arc<T>, WorkerError>
+    where
+        T: Send + Sync + 'static,
+        F: FnOnce() -> Result<T, WorkerError>,
+    {
+        let mut models = self.models.lock().unwrap_or_else(|e| e.into_inner());
+        if let Some(existing) = models.get(key) {
+            return existing
+                .clone()
+                .downcast::<T>()
+                .map_err(|_| WorkerError::ResultType);
+        }
+        let model = Arc::new(load()?);
+        models.insert(key.to_string(), model.clone());
+        Ok(model)
+    }
+}
+
+impl OrtWorker {
+    /// Spawn one worker with a hard bounded admission queue.
+    pub fn spawn(export_pause: ExportPause, capacity: usize) -> Self {
+        let (sender, receiver) = mpsc::sync_channel(capacity.max(1));
+        let inner = Arc::new(WorkerInner {
+            sender,
+            dedupe: Mutex::new(HashMap::new()),
+            capacity: capacity.max(1),
+            queued: AtomicUsize::new(0),
+            sequence: AtomicU64::new(0),
+            active: AtomicUsize::new(0),
+            shutdown: AtomicBool::new(false),
+            thread: Mutex::new(None),
+        });
+        let thread_inner = inner.clone();
+        let thread = std::thread::Builder::new()
+            .name("opentake-ort-worker".into())
+            .spawn(move || worker_loop(thread_inner, receiver, export_pause))
+            .expect("spawn bounded inference worker");
+        *inner.thread.lock().unwrap_or_else(|e| e.into_inner()) = Some(thread);
+        Self { inner }
+    }
+
+    /// Submit a typed job. A live duplicate key reuses the same result and does
+    /// not consume queue capacity or execute a second task.
+    pub fn submit<T, F>(&self, request: JobRequest, task: F) -> Result<JobHandle<T>, WorkerError>
+    where
+        T: Clone + Send + Sync + 'static,
+        F: FnOnce(&OrtModelRegistry, &CancelToken) -> Result<T, WorkerError> + Send + 'static,
+    {
+        if self.inner.shutdown.load(Ordering::SeqCst) {
+            return Err(WorkerError::Shutdown);
+        }
+
+        let mut dedupe = self.inner.dedupe.lock().unwrap_or_else(|e| e.into_inner());
+        dedupe.retain(|_, weak| weak.strong_count() > 0);
+        if let Some(shared) = dedupe.get(&request.dedupe_key).and_then(Weak::upgrade) {
+            return Ok(JobHandle {
+                shared,
+                marker: PhantomData,
+            });
+        }
+
+        if self
+            .inner
+            .queued
+            .fetch_update(Ordering::SeqCst, Ordering::SeqCst, |queued| {
+                (queued < self.inner.capacity).then_some(queued + 1)
+            })
+            .is_err()
+        {
+            return Err(WorkerError::QueueFull);
+        }
+
+        let key = request.dedupe_key.clone();
+        let shared = Arc::new(SharedJob::new(request));
+        dedupe.insert(key.clone(), Arc::downgrade(&shared));
+        let sequence = self.inner.sequence.fetch_add(1, Ordering::SeqCst);
+        let erased: JobTask = Box::new(move |models, cancel| {
+            task(models, cancel).map(|value| Arc::new(value) as ErasedResult)
+        });
+        let message = WorkerMessage::Job(QueuedJob {
+            sequence,
+            shared: shared.clone(),
+            task: Some(erased),
+        });
+        match self.inner.sender.try_send(message) {
+            Ok(()) => Ok(JobHandle {
+                shared,
+                marker: PhantomData,
+            }),
+            Err(TrySendError::Full(_)) => {
+                self.inner.queued.fetch_sub(1, Ordering::SeqCst);
+                dedupe.remove(&key);
+                Err(WorkerError::QueueFull)
+            }
+            Err(TrySendError::Disconnected(_)) => {
+                self.inner.queued.fetch_sub(1, Ordering::SeqCst);
+                dedupe.remove(&key);
+                Err(WorkerError::Shutdown)
+            }
+        }
+    }
+
+    pub fn active_jobs(&self) -> usize {
+        self.inner.active.load(Ordering::SeqCst)
+    }
+
+    pub fn queued_jobs(&self) -> usize {
+        self.inner.queued.load(Ordering::SeqCst)
+    }
+
+    /// Cancel queued work, wait for the cooperative running job, and join the
+    /// sole worker thread. Idempotent.
+    pub fn shutdown(&self) -> Result<(), WorkerError> {
+        if !self.inner.shutdown.swap(true, Ordering::SeqCst) {
+            // A full channel is not an error: the worker observes the atomic
+            // shutdown flag at its next cancellation/dispatch boundary.
+            let _ = self.inner.sender.try_send(WorkerMessage::Shutdown);
+        }
+        if let Some(thread) = self
+            .inner
+            .thread
+            .lock()
+            .unwrap_or_else(|e| e.into_inner())
+            .take()
+        {
+            thread.join().map_err(|_| WorkerError::Panicked)?;
+        }
+        Ok(())
+    }
+}
+
+fn worker_loop(inner: Arc<WorkerInner>, receiver: Receiver<WorkerMessage>, pause: ExportPause) {
+    let registry = OrtModelRegistry::default();
+    let mut pending = Vec::<QueuedJob>::new();
+    let mut high_streak = 0usize;
+
+    loop {
+        if pending.is_empty() {
+            match receiver.recv() {
+                Ok(WorkerMessage::Job(job)) => pending.push(job),
+                Ok(WorkerMessage::Shutdown) | Err(_) => break,
+            }
+        }
+
+        let mut shutdown = false;
+        loop {
+            match receiver.try_recv() {
+                Ok(WorkerMessage::Job(job)) => pending.push(job),
+                Ok(WorkerMessage::Shutdown) => {
+                    shutdown = true;
+                    break;
+                }
+                Err(TryRecvError::Empty) => break,
+                Err(TryRecvError::Disconnected) => {
+                    shutdown = true;
+                    break;
+                }
+            }
+        }
+        if shutdown || inner.shutdown.load(Ordering::SeqCst) {
+            cancel_pending(&pending);
+            break;
+        }
+
+        if !pause.wait_while_active(|| inner.shutdown.load(Ordering::SeqCst)) {
+            cancel_pending(&pending);
+            break;
+        }
+
+        // Requests may arrive while the worker is pressure-gated. Re-drain at
+        // the scheduling boundary so their priority participates immediately.
+        loop {
+            match receiver.try_recv() {
+                Ok(WorkerMessage::Job(job)) => pending.push(job),
+                Ok(WorkerMessage::Shutdown) => {
+                    cancel_pending(&pending);
+                    inner.active.store(0, Ordering::SeqCst);
+                    return;
+                }
+                Err(TryRecvError::Empty) => break,
+                Err(TryRecvError::Disconnected) => {
+                    cancel_pending(&pending);
+                    inner.active.store(0, Ordering::SeqCst);
+                    return;
+                }
+            }
+        }
+
+        // Four high-priority jobs is the starvation bound. Otherwise choose the
+        // oldest job at the highest available priority (FIFO within priority).
+        let has_background = pending
+            .iter()
+            .any(|job| job.shared.request.priority == JobPriority::Background);
+        let force_background = has_background && high_streak >= 4;
+        let selected_priority = if force_background {
+            JobPriority::Background
+        } else {
+            pending
+                .iter()
+                .map(|job| job.shared.request.priority)
+                .max()
+                .unwrap_or(JobPriority::Background)
+        };
+        let index = pending
+            .iter()
+            .enumerate()
+            .filter(|(_, job)| job.shared.request.priority == selected_priority)
+            .min_by_key(|(_, job)| job.sequence)
+            .map(|(index, _)| index)
+            .expect("pending queue is not empty");
+        let mut job = pending.swap_remove(index);
+        inner.queued.fetch_sub(1, Ordering::SeqCst);
+        if selected_priority == JobPriority::Interactive {
+            high_streak += 1;
+        } else {
+            high_streak = 0;
+        }
+
+        if !job.shared.set_running() {
+            remove_dedupe(&inner, &job.shared);
+            job.shared.finish(Err(WorkerError::Cancelled));
+            continue;
+        }
+        inner.active.fetch_add(1, Ordering::SeqCst);
+        let task = job.task.take().expect("queued job owns one task");
+        let outcome = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
+            task(&registry, &job.shared.cancel)
+        }))
+        .unwrap_or(Err(WorkerError::Panicked));
+        inner.active.fetch_sub(1, Ordering::SeqCst);
+        remove_dedupe(&inner, &job.shared);
+        job.shared.finish(outcome);
+    }
+
+    inner.active.store(0, Ordering::SeqCst);
+    inner.queued.store(0, Ordering::SeqCst);
+}
+
+fn cancel_pending(pending: &[QueuedJob]) {
+    for job in pending {
+        job.shared.cancel.cancel();
+        job.shared.finish(Err(WorkerError::Cancelled));
+    }
+}
+
+fn remove_dedupe(inner: &WorkerInner, shared: &Arc<SharedJob>) {
+    let mut dedupe = inner.dedupe.lock().unwrap_or_else(|e| e.into_inner());
+    if dedupe
+        .get(&shared.request.dedupe_key)
+        .and_then(Weak::upgrade)
+        .is_some_and(|current| Arc::ptr_eq(&current, shared))
+    {
+        dedupe.remove(&shared.request.dedupe_key);
+    }
+}
+
 #[cfg(feature = "ort-backend")]
 mod model {
     use std::collections::HashMap;
@@ -79,6 +605,8 @@ mod model {
     use super::ExecutionProvider;
     use crate::error::{MediaError, Result};
 
+    pub type OrtIoContract = (Vec<(String, String)>, Vec<(String, String)>);
+
     /// A loaded ONNX model + a CPU-fallback-friendly session. `Session` is not
     /// `Sync`; wrap in a `Mutex` so the worker can share it.
     pub struct OrtModel {
@@ -88,6 +616,7 @@ mod model {
     impl OrtModel {
         /// Load `path` with the given EP preference, falling back to CPU.
         pub fn load(path: &Path, _ep: ExecutionProvider) -> Result<Self> {
+            crate::initialize_ort_backend();
             let builder =
                 Session::builder().map_err(|e| MediaError::ModelInstall(format!("ort: {e}")))?;
             let builder = builder
@@ -137,11 +666,29 @@ mod model {
             }
             Ok(out)
         }
+
+        /// Names and debug-formatted tensor contracts declared by the model.
+        /// Used to fail closed when a downloaded advanced model does not match
+        /// the pinned architecture before any user media reaches inference.
+        pub fn io_contract(&self) -> OrtIoContract {
+            let session = self.session.lock().unwrap();
+            let inputs = session
+                .inputs
+                .iter()
+                .map(|input| (input.name.clone(), format!("{:?}", input.input_type)))
+                .collect();
+            let outputs = session
+                .outputs
+                .iter()
+                .map(|output| (output.name.clone(), format!("{:?}", output.output_type)))
+                .collect();
+            (inputs, outputs)
+        }
     }
 }
 
 #[cfg(feature = "ort-backend")]
-pub use model::OrtModel;
+pub use model::{OrtIoContract, OrtModel};
 
 #[cfg(test)]
 mod tests {
@@ -172,4 +719,21 @@ mod tests {
         assert_eq!(t.shape[0], -1);
         assert_eq!(t.dtype, TensorDType::F32);
     }
+
+    #[cfg(feature = "ort-backend")]
+    #[test]
+    fn installed_advanced_model_contract_can_be_inspected_before_inference() {
+        let Some(path) = std::env::var_os("OPENTAKE_TEST_ONNX_MODEL") else {
+            return;
+        };
+        let model = OrtModel::load(
+            std::path::Path::new(&path),
+            ExecutionProvider::platform_default(),
+        )
+        .expect("load supplied ONNX model");
+        let contract = model.io_contract();
+        assert!(!contract.0.is_empty());
+        assert!(!contract.1.is_empty());
+        eprintln!("ONNX_IO_CONTRACT={contract:?}");
+    }
 }
diff --git a/crates/opentake-media/src/probe.rs b/crates/opentake-media/src/probe.rs
index 8829ee9b..4794ba14 100644
--- a/crates/opentake-media/src/probe.rs
+++ b/crates/opentake-media/src/probe.rs
@@ -8,6 +8,8 @@
 
 use std::path::Path;
 
+use opentake_domain::MediaColorMetadata;
+
 use crate::error::{MediaError, Result};
 use crate::ff;
 
@@ -28,6 +30,9 @@ pub struct MediaProbe {
     /// `mov,mp4,m4a,3gp,3g2,mj2`). Security-sensitive import boundaries use
     /// this to verify that downloaded bytes match their declared container.
     pub format_name: Option<String>,
+    /// Source video color signalling retained for HDR-aware decode and durable
+    /// project metadata. Absent only when the stream reports no color fields.
+    pub color: Option<MediaColorMetadata>,
 }
 
 /// Open the container and read the first video stream + audio presence.
@@ -125,6 +130,7 @@ pub fn parse_probe(json: &serde_json::Value) -> MediaProbe {
     let mut height = None;
     let mut fps = None;
     let mut video_duration = None;
+    let mut color = None;
 
     if let Some(v) = video {
         let w = v.get("width").and_then(|x| x.as_u64()).map(|x| x as u32);
@@ -152,6 +158,28 @@ pub fn parse_probe(json: &serde_json::Value) -> MediaProbe {
             .get("duration")
             .and_then(|x| x.as_str())
             .and_then(|s| s.parse::<f64>().ok());
+
+        let metadata = MediaColorMetadata {
+            primaries: v
+                .get("color_primaries")
+                .and_then(|value| value.as_str())
+                .map(str::to_owned),
+            transfer: v
+                .get("color_transfer")
+                .and_then(|value| value.as_str())
+                .map(str::to_owned),
+            matrix: v
+                .get("color_space")
+                .and_then(|value| value.as_str())
+                .map(str::to_owned),
+            range: v
+                .get("color_range")
+                .and_then(|value| value.as_str())
+                .map(str::to_owned),
+        };
+        if !metadata.is_empty() {
+            color = Some(metadata);
+        }
     }
 
     let container_duration = json
@@ -175,6 +203,7 @@ pub fn parse_probe(json: &serde_json::Value) -> MediaProbe {
         has_audio,
         has_video,
         format_name,
+        color,
     }
 }
 
diff --git a/crates/opentake-media/src/proxy.rs b/crates/opentake-media/src/proxy.rs
new file mode 100644
index 00000000..c4f71970
--- /dev/null
+++ b/crates/opentake-media/src/proxy.rs
@@ -0,0 +1,222 @@
+//! Project-local low-resolution proxy creation.
+//!
+//! The source is read-only and hashed before and after transcoding. FFmpeg
+//! writes to a sibling partial file which is renamed only after a successful
+//! probe, so cancellation and failures never expose a truncated proxy.
+
+use std::fs::{self, File};
+use std::io::{BufReader, Read};
+use std::path::{Path, PathBuf};
+use std::process::{Command, Stdio};
+use std::sync::Arc;
+use std::time::Duration;
+
+use sha2::{Digest, Sha256};
+
+use crate::cancel::MediaCancelToken;
+use crate::error::{MediaError, Result};
+use crate::{ff, probe};
+
+pub type ProxyProgressCallback = Arc<dyn Fn(usize, usize) + Send + Sync>;
+
+#[derive(Clone, Copy, Debug)]
+pub struct ProxyRequest<'a> {
+    pub source: &'a Path,
+    pub output: &'a Path,
+    pub max_size: (u32, u32),
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct ProxyResult {
+    pub path: PathBuf,
+    pub source_sha256: String,
+    pub width: u32,
+    pub height: u32,
+}
+
+fn report(progress: &Option<ProxyProgressCallback>, done: usize) {
+    if let Some(callback) = progress {
+        callback(done, 1000);
+    }
+}
+
+pub fn file_sha256(path: &Path) -> Result<String> {
+    let mut reader = BufReader::new(File::open(path)?);
+    let mut hasher = Sha256::new();
+    let mut buffer = [0_u8; 64 * 1024];
+    loop {
+        let read = reader.read(&mut buffer)?;
+        if read == 0 {
+            break;
+        }
+        hasher.update(&buffer[..read]);
+    }
+    Ok(format!("{:x}", hasher.finalize()))
+}
+
+fn partial_path(output: &Path) -> PathBuf {
+    match output.extension().and_then(|extension| extension.to_str()) {
+        Some(extension) => output.with_extension(format!("{extension}.partial")),
+        None => output.with_extension("partial"),
+    }
+}
+
+fn cleanup_partial(path: &Path) {
+    if path.is_file() {
+        let _ = fs::remove_file(path);
+    }
+}
+
+pub fn create_proxy(
+    request: ProxyRequest<'_>,
+    cancel: &MediaCancelToken,
+    progress: Option<ProxyProgressCallback>,
+) -> Result<ProxyResult> {
+    report(&progress, 0);
+    if cancel.is_cancelled() {
+        return Err(MediaError::Cancelled);
+    }
+    if request.max_size.0 == 0 || request.max_size.1 == 0 {
+        return Err(MediaError::Ffmpeg(
+            "proxy dimensions must be positive".to_string(),
+        ));
+    }
+    if !request.source.is_file() {
+        return Err(MediaError::Io(std::io::Error::new(
+            std::io::ErrorKind::NotFound,
+            request.source.display().to_string(),
+        )));
+    }
+    if request.output.exists() {
+        return Err(MediaError::Ffmpeg(
+            "proxy destination already exists".to_string(),
+        ));
+    }
+
+    let partial = partial_path(request.output);
+    if partial.exists() {
+        return Err(MediaError::Ffmpeg(
+            "proxy partial destination already exists".to_string(),
+        ));
+    }
+    if let Some(parent) = request.output.parent() {
+        fs::create_dir_all(parent)?;
+    }
+
+    let source_sha256 = file_sha256(request.source)?;
+    report(&progress, 100);
+    if cancel.is_cancelled() {
+        return Err(MediaError::Cancelled);
+    }
+
+    let scale = format!(
+        "scale=w={}:h={}:force_original_aspect_ratio=decrease:force_divisible_by=2",
+        request.max_size.0, request.max_size.1
+    );
+    let mut child = Command::new(ff::ffmpeg_path())
+        .args(["-hide_banner", "-loglevel", "error", "-nostdin", "-y"])
+        .arg("-i")
+        .arg(request.source)
+        .args(["-map", "0:v:0", "-map", "0:a?", "-vf"])
+        .arg(scale)
+        .args([
+            "-c:v",
+            "libx264",
+            "-preset",
+            "veryfast",
+            "-crf",
+            "23",
+            "-pix_fmt",
+            "yuv420p",
+            "-c:a",
+            "aac",
+            "-movflags",
+            "+faststart",
+            "-f",
+            "mp4",
+        ])
+        .arg(&partial)
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()
+        .map_err(|error| MediaError::Ffmpeg(format!("proxy spawn: {error}")))?;
+    cancel.child_spawned();
+
+    loop {
+        if cancel.is_cancelled() {
+            let _ = child.kill();
+            let _ = child.wait();
+            cleanup_partial(&partial);
+            return Err(MediaError::Cancelled);
+        }
+        match child.try_wait() {
+            Ok(Some(status)) => {
+                if !status.success() || !partial.is_file() {
+                    cleanup_partial(&partial);
+                    return Err(MediaError::Ffmpeg(
+                        "proxy transcode did not complete".to_string(),
+                    ));
+                }
+                break;
+            }
+            Ok(None) => {
+                report(&progress, 500);
+                std::thread::sleep(Duration::from_millis(20));
+            }
+            Err(error) => {
+                let _ = child.kill();
+                let _ = child.wait();
+                cleanup_partial(&partial);
+                return Err(error.into());
+            }
+        }
+    }
+
+    report(&progress, 900);
+    if cancel.is_cancelled() {
+        cleanup_partial(&partial);
+        return Err(MediaError::Cancelled);
+    }
+    if file_sha256(request.source)? != source_sha256 {
+        cleanup_partial(&partial);
+        return Err(MediaError::Checksum(
+            "source changed while proxy was being created".to_string(),
+        ));
+    }
+
+    let metadata = match probe(&partial) {
+        Ok(metadata) if metadata.has_video => metadata,
+        Ok(_) => {
+            cleanup_partial(&partial);
+            return Err(MediaError::no_track("video", &partial));
+        }
+        Err(error) => {
+            cleanup_partial(&partial);
+            return Err(error);
+        }
+    };
+    let (width, height) = match (metadata.width, metadata.height) {
+        (Some(width), Some(height)) if width > 0 && height > 0 => (width, height),
+        _ => {
+            cleanup_partial(&partial);
+            return Err(MediaError::Decode(
+                "proxy has no usable dimensions".to_string(),
+            ));
+        }
+    };
+    if request.output.exists() {
+        cleanup_partial(&partial);
+        return Err(MediaError::Ffmpeg(
+            "proxy destination appeared during transcode".to_string(),
+        ));
+    }
+    fs::rename(&partial, request.output)?;
+    report(&progress, 1000);
+
+    Ok(ProxyResult {
+        path: request.output.to_path_buf(),
+        source_sha256,
+        width,
+        height,
+    })
+}
diff --git a/crates/opentake-media/src/search/ort_embedder.rs b/crates/opentake-media/src/search/ort_embedder.rs
index d87acc00..6ae1859e 100644
--- a/crates/opentake-media/src/search/ort_embedder.rs
+++ b/crates/opentake-media/src/search/ort_embedder.rs
@@ -109,6 +109,7 @@ impl OrtEmbedder {
 }
 
 fn build_session(path: &Path) -> Result<Session> {
+    crate::initialize_ort_backend();
     let builder = Session::builder().map_err(|e| MediaError::ModelInstall(format!("ort: {e}")))?;
     // Default EP set; ort falls back to CPU when an accelerator is unavailable.
     let builder = builder
diff --git a/crates/opentake-media/src/thumbnail/project.rs b/crates/opentake-media/src/thumbnail/project.rs
index d3ac14cf..aaa3fd14 100644
--- a/crates/opentake-media/src/thumbnail/project.rs
+++ b/crates/opentake-media/src/thumbnail/project.rs
@@ -223,6 +223,8 @@ mod tests {
             source_height: Some(4),
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-media/src/transcribe/captions.rs b/crates/opentake-media/src/transcribe/captions.rs
index ebeb88ee..bae57e64 100644
--- a/crates/opentake-media/src/transcribe/captions.rs
+++ b/crates/opentake-media/src/transcribe/captions.rs
@@ -41,7 +41,7 @@
 
 use opentake_domain::Clip;
 
-use super::{TranscriptionResult, TranscriptionSegment};
+use super::{TranscriptionResult, TranscriptionSegment, TranscriptionWord};
 
 /// Per-phrase floor display duration, in **seconds**. 1:1 with upstream
 /// `AppTheme.Caption.minDisplayDuration = 0.7` (`AppTheme.swift:249`), the
@@ -395,8 +395,7 @@ pub fn caption_specs<F: Fn(&str) -> bool>(
         if clips.is_empty() {
             continue;
         }
-        let seg_phrases: Vec<Phrase> = result
-            .segments
+        let seg_phrases: Vec<Phrase> = visible_caption_segments(result, &clips, fps)
             .iter()
             .flat_map(|seg| phrases(seg, fits, MIN_DISPLAY_DURATION_SECS))
             .collect();
@@ -434,6 +433,151 @@ pub fn caption_specs<F: Fn(&str) -> bool>(
     out
 }
 
+/// Rebuild source segments from the words that are still visible through the
+/// current clip fragments. A cached source segment keeps its original text even
+/// after a ripple cut; using it verbatim would resurrect deleted fillers in
+/// newly generated captions. Uncut segments retain their original punctuation,
+/// while cut segments are sliced from that original text using the surviving
+/// Whisper token sequence (including subword tokens such as `synchron` +
+/// `ized`).
+fn visible_caption_segments(
+    result: &TranscriptionResult,
+    clips: &[&CaptionTarget<'_>],
+    fps: i32,
+) -> Vec<TranscriptionSegment> {
+    let fps_d = fps as f64;
+    let mut rebuilt = Vec::new();
+    for segment in &result.segments {
+        let segment_words = result
+            .words
+            .iter()
+            .filter(|word| match (word.start, word.end) {
+                (Some(start), Some(end)) => {
+                    let midpoint = (start + end) / 2.0;
+                    midpoint >= segment.start && midpoint < segment.end
+                }
+                _ => false,
+            })
+            .collect::<Vec<_>>();
+        if segment_words.is_empty() {
+            rebuilt.push(segment.clone());
+            continue;
+        }
+
+        let owners = segment_words
+            .iter()
+            .map(|word| {
+                let (start, end) = (word.start?, word.end?);
+                let midpoint_frame = (start + end) / 2.0 * fps_d;
+                clips.iter().position(|target| {
+                    let (visible_start, visible_end) = visible_source_span(target.clip);
+                    visible_start <= midpoint_frame && midpoint_frame < visible_end
+                })
+            })
+            .collect::<Vec<_>>();
+
+        if owners.iter().all(Option::is_some) && owners.windows(2).all(|pair| pair[0] == pair[1]) {
+            rebuilt.push(segment.clone());
+            continue;
+        }
+
+        let token_ranges = token_byte_ranges(&segment.text, &segment_words);
+        let mut index = 0;
+        while index < segment_words.len() {
+            let Some(owner) = owners[index] else {
+                index += 1;
+                continue;
+            };
+            let run_start = index;
+            index += 1;
+            while index < segment_words.len() && owners[index] == Some(owner) {
+                index += 1;
+            }
+            let run_end = index;
+            let text = token_ranges
+                .as_ref()
+                .and_then(|ranges| slice_token_run(&segment.text, ranges, run_start, run_end))
+                .unwrap_or_else(|| detokenize(&segment_words[run_start..run_end]));
+            let start = segment_words[run_start].start.unwrap_or(segment.start);
+            let end = segment_words[run_end - 1].end.unwrap_or(segment.end);
+            if !text.trim().is_empty() && end > start {
+                rebuilt.push(TranscriptionSegment { text, start, end });
+            }
+        }
+    }
+    rebuilt
+}
+
+fn token_byte_ranges(text: &str, words: &[&TranscriptionWord]) -> Option<Vec<(usize, usize)>> {
+    let mut normalized = Vec::new();
+    for (byte_start, ch) in text.char_indices() {
+        if !ch.is_alphanumeric() {
+            continue;
+        }
+        let byte_end = byte_start + ch.len_utf8();
+        for folded in ch.to_lowercase() {
+            normalized.push((folded, byte_start, byte_end));
+        }
+    }
+
+    let mut cursor = 0;
+    let mut ranges = Vec::with_capacity(words.len());
+    for word in words {
+        let needle = word
+            .text
+            .chars()
+            .filter(|ch| ch.is_alphanumeric())
+            .flat_map(char::to_lowercase)
+            .collect::<Vec<_>>();
+        if needle.is_empty() {
+            return None;
+        }
+        if cursor > normalized.len() || needle.len() > normalized.len() - cursor {
+            return None;
+        }
+        let position = (cursor..=normalized.len().saturating_sub(needle.len())).find(|start| {
+            normalized[*start..*start + needle.len()]
+                .iter()
+                .map(|entry| entry.0)
+                .eq(needle.iter().copied())
+        })?;
+        let end_position = position + needle.len() - 1;
+        ranges.push((normalized[position].1, normalized[end_position].2));
+        cursor = position + needle.len();
+    }
+    Some(ranges)
+}
+
+fn slice_token_run(
+    text: &str,
+    ranges: &[(usize, usize)],
+    start: usize,
+    end: usize,
+) -> Option<String> {
+    let byte_start = ranges.get(start)?.0;
+    let mut byte_end = ranges.get(end.checked_sub(1)?)?.1;
+    let next_start = ranges.get(end).map(|range| range.0).unwrap_or(text.len());
+    let punctuation_start = byte_end;
+    // Preserve punctuation attached to the final surviving token, but not the
+    // whitespace leading into a removed token.
+    for (offset, ch) in text[punctuation_start..next_start].char_indices() {
+        if ch.is_whitespace() || ch.is_alphanumeric() {
+            break;
+        }
+        byte_end = punctuation_start + offset + ch.len_utf8();
+    }
+    Some(text.get(byte_start..byte_end)?.trim().to_string())
+}
+
+fn detokenize(words: &[&TranscriptionWord]) -> String {
+    words
+        .iter()
+        .map(|word| word.text.trim())
+        .filter(|text| !text.is_empty())
+        .collect::<Vec<_>>()
+        .join(" ")
+}
+
 /// The clip whose visible source window overlaps phrase `p` the most, but only
 /// when the overlap is real (`> 0`) and covers at least half the phrase. 1:1 port
 /// of `bestClip(for:among:)` (`EditorViewModel+Captions.swift:186-195`).
@@ -786,6 +930,45 @@ mod tests {
         assert_eq!(out[0].start_frame, 0);
     }
 
+    #[test]
+    fn caption_specs_rebuild_cut_segment_from_visible_words() {
+        // A three-frame ripple cut removes only "Um" between two fragments of
+        // the same source. A cached segment still contains the old full text;
+        // regenerated captions must use the surviving words and preserve a
+        // split Whisper token as the original "synchronized" spelling.
+        let before = clip("before", 0, 151, 0, 1.0);
+        let after = clip("after", 151, 746, 154, 1.0);
+        let transcript = result(
+            vec![
+                word("Um", 5.0, 5.1),
+                word("today", 5.2, 5.4),
+                word("synchron", 5.4, 5.7),
+                word("ized", 5.7, 5.9),
+            ],
+            vec![seg("Um, today synchronized", 5.0, 5.9)],
+        );
+        let targets = vec![
+            CaptionTarget {
+                clip_id: "before".into(),
+                track_id: "voice".into(),
+                clip: &before,
+                transcript: Some(&transcript),
+            },
+            CaptionTarget {
+                clip_id: "after".into(),
+                track_id: "voice".into(),
+                clip: &after,
+                transcript: Some(&transcript),
+            },
+        ];
+
+        let out = caption_specs(&targets, 30, CaptionCase::Auto, "g", &fits_words(5));
+
+        assert_eq!(out.len(), 1);
+        assert_eq!(out[0].content, "today synchronized");
+        assert!(!out[0].content.contains("Um"));
+    }
+
     #[test]
     fn caption_specs_empty_transcript_yields_nothing() {
         let c = clip("c1", 0, 300, 0, 1.0);
diff --git a/crates/opentake-media/src/transcribe/whisper.rs b/crates/opentake-media/src/transcribe/whisper.rs
index f0cb067c..2100aa94 100644
--- a/crates/opentake-media/src/transcribe/whisper.rs
+++ b/crates/opentake-media/src/transcribe/whisper.rs
@@ -50,6 +50,203 @@ fn cs_to_secs(cs: i64) -> f64 {
     cs as f64 / 100.0
 }
 
+// whisper.cpp's experimental token timestamps can spread the first words of
+// an utterance backwards across a long leading pause (the segment timestamp
+// token commonly starts at the pause itself).  That is dangerous for edit
+// tools: deleting a filler word would then delete silence, or an earlier word,
+// instead of the spoken filler.  Tighten only *silent segment edges* using the
+// same PCM that Whisper consumed, then preserve token order by mapping the
+// original token positions into the audible interval.  Internal pauses are
+// intentionally untouched.
+fn align_segment_to_speech(
+    pcm: &PcmBuffer,
+    segment: &mut TranscriptionSegment,
+    words: &mut [TranscriptionWord],
+) {
+    const WINDOW_SECS: f64 = 0.020;
+    const HOP_SECS: f64 = 0.010;
+    const ABSOLUTE_RMS_FLOOR: f64 = 0.001; // -60 dBFS
+    const RELATIVE_TO_PEAK: f64 = 0.02; // -34 dB from this segment's peak
+    const EDGE_PADDING_SECS: f64 = 0.040;
+    const MIN_EDGE_TRIM_SECS: f64 = 0.080;
+
+    let sample_rate = pcm.spec.sample_rate as usize;
+    let old_start = segment.start.max(0.0);
+    let old_end = segment.end.min(pcm.duration_secs());
+    let old_duration = old_end - old_start;
+    if sample_rate == 0 || old_duration <= 0.0 || words.is_empty() {
+        return;
+    }
+
+    let range_start = (old_start * sample_rate as f64).floor() as usize;
+    let range_end = ((old_end * sample_rate as f64).ceil() as usize).min(pcm.samples_f32.len());
+    if range_end <= range_start {
+        return;
+    }
+
+    let window = ((WINDOW_SECS * sample_rate as f64).round() as usize).max(1);
+    let hop = ((HOP_SECS * sample_rate as f64).round() as usize).max(1);
+    let mut energy_windows = Vec::new();
+    let mut cursor = range_start;
+    while cursor < range_end {
+        let end = (cursor + window).min(range_end);
+        let samples = &pcm.samples_f32[cursor..end];
+        let square_sum = samples
+            .iter()
+            .map(|sample| f64::from(*sample) * f64::from(*sample))
+            .sum::<f64>();
+        let rms = (square_sum / samples.len() as f64).sqrt();
+        energy_windows.push((cursor, end, rms));
+        cursor = cursor.saturating_add(hop);
+    }
+
+    let peak_rms = energy_windows
+        .iter()
+        .map(|(_, _, rms)| *rms)
+        .fold(0.0_f64, f64::max);
+    if peak_rms <= ABSOLUTE_RMS_FLOOR {
+        return;
+    }
+    let threshold = ABSOLUTE_RMS_FLOOR.max(peak_rms * RELATIVE_TO_PEAK);
+    let Some(first_audible) = energy_windows
+        .iter()
+        .position(|(_, _, rms)| *rms > threshold)
+    else {
+        return;
+    };
+    let last_audible = energy_windows
+        .iter()
+        .rposition(|(_, _, rms)| *rms > threshold)
+        .unwrap_or(first_audible);
+
+    let detected_start = energy_windows[first_audible].0 as f64 / sample_rate as f64;
+    let detected_end = energy_windows[last_audible].1 as f64 / sample_rate as f64;
+    let mut new_start = (detected_start - EDGE_PADDING_SECS).max(old_start);
+    let mut new_end = (detected_end + EDGE_PADDING_SECS).min(old_end);
+    if new_start - old_start < MIN_EDGE_TRIM_SECS {
+        new_start = old_start;
+    }
+    if old_end - new_end < MIN_EDGE_TRIM_SECS {
+        new_end = old_end;
+    }
+    if new_end <= new_start || (new_start == old_start && new_end == old_end) {
+        return;
+    }
+
+    let new_duration = new_end - new_start;
+    let remap = |time: f64| {
+        let progress = ((time - old_start) / old_duration).clamp(0.0, 1.0);
+        new_start + progress * new_duration
+    };
+    for word in words {
+        if let Some(start) = word.start {
+            word.start = Some(remap(start));
+        }
+        if let Some(end) = word.end {
+            word.end = Some(remap(end));
+        }
+        if let (Some(start), Some(end)) = (word.start, word.end) {
+            if end < start {
+                word.end = Some(start);
+            }
+        }
+    }
+    segment.start = new_start;
+    segment.end = new_end;
+}
+
+/// Keep edit-facing word rows lexical and give Whisper's zero-duration lexical
+/// tokens a real, non-overlapping interval.  Whisper commonly emits `You`
+/// `[t,t]` followed by `know` `[t,t+n]`; dropping the first span makes the
+/// multi-word filler impossible to review or remove.  Punctuation-only tokens
+/// are not independently editable words, so their time is available to the
+/// neighboring lexical token.
+fn normalize_word_timings(segment: &TranscriptionSegment, words: &mut Vec<TranscriptionWord>) {
+    const EPSILON: f64 = 1e-9;
+
+    words.retain(|word| word.text.chars().any(char::is_alphanumeric));
+    let mut index = 0;
+    while index < words.len() {
+        let (Some(start), Some(end)) = (words[index].start, words[index].end) else {
+            index += 1;
+            continue;
+        };
+        if end > start + EPSILON {
+            index += 1;
+            continue;
+        }
+
+        // A same-start run with a later positive interval (for example
+        // `You [t,t]`, `know [t,t+n]`) represents a single Whisper interval
+        // shared by multiple lexical tokens. Split it by character weight.
+        let mut run_end = index + 1;
+        let mut shared_end = start;
+        while run_end < words.len() {
+            let (Some(next_start), Some(next_end)) = (words[run_end].start, words[run_end].end)
+            else {
+                break;
+            };
+            if (next_start - start).abs() > EPSILON {
+                break;
+            }
+            shared_end = shared_end.max(next_end);
+            run_end += 1;
+        }
+        if shared_end > start + EPSILON {
+            let total_weight = words[index..run_end]
+                .iter()
+                .map(|word| {
+                    word.text
+                        .chars()
+                        .filter(|c| c.is_alphanumeric())
+                        .count()
+                        .max(1)
+                })
+                .sum::<usize>() as f64;
+            let mut cursor = start;
+            for word in &mut words[index..run_end] {
+                let weight = word
+                    .text
+                    .chars()
+                    .filter(|c| c.is_alphanumeric())
+                    .count()
+                    .max(1) as f64;
+                let next = if (cursor - shared_end).abs() <= EPSILON {
+                    shared_end
+                } else {
+                    (cursor + (shared_end - start) * weight / total_weight).min(shared_end)
+                };
+                word.start = Some(cursor);
+                word.end = Some(next);
+                cursor = next;
+            }
+            if let Some(last) = words.get_mut(run_end - 1) {
+                last.end = Some(shared_end);
+            }
+            index = run_end;
+            continue;
+        }
+
+        // A lone zero-duration token owns the gap to the next lexical token.
+        let next_start = words[index + 1..]
+            .iter()
+            .filter_map(|word| word.start)
+            .find(|next| *next > start + EPSILON)
+            .unwrap_or(segment.end);
+        if next_start > start + EPSILON {
+            words[index].end = Some(next_start.min(segment.end));
+        } else if index > 0 {
+            let previous_end = words[index - 1].end.unwrap_or(segment.start);
+            let fallback_start = (segment.end - 0.08).max(previous_end);
+            if segment.end > fallback_start + EPSILON {
+                words[index].start = Some(fallback_start);
+                words[index].end = Some(segment.end);
+            }
+        }
+        index += 1;
+    }
+}
+
 impl Transcriber for WhisperTranscriber {
     fn transcribe_pcm(
         &self,
@@ -100,16 +297,13 @@ impl Transcriber for WhisperTranscriber {
             // they only ever show up reconstructed at the segment level.
             // Excluded from `full_text` too, so the plain-text summary stays
             // consistent with `segments`.
-            if !trimmed.is_empty() && !super::is_non_speech_marker(trimmed) {
+            let keep_segment = !trimmed.is_empty() && !super::is_non_speech_marker(trimmed);
+            if keep_segment {
                 full_text.push_str(&seg_text);
-                segments.push(TranscriptionSegment {
-                    text: trimmed.to_string(),
-                    start: cs_to_secs(t0),
-                    end: cs_to_secs(t1),
-                });
             }
 
             let n_tokens = state.full_n_tokens(i).unwrap_or(0);
+            let mut segment_words = Vec::new();
             for j in 0..n_tokens {
                 let tok_text = match state.full_get_token_text(i, j) {
                     Ok(t) => t,
@@ -131,12 +325,23 @@ impl Transcriber for WhisperTranscriber {
                     Some(d) => (Some(cs_to_secs(d.t0)), Some(cs_to_secs(d.t1))),
                     None => (None, None),
                 };
-                words.push(TranscriptionWord {
+                segment_words.push(TranscriptionWord {
                     text: trimmed_tok.to_string(),
                     start,
                     end,
                 });
             }
+            if keep_segment {
+                let mut segment = TranscriptionSegment {
+                    text: trimmed.to_string(),
+                    start: cs_to_secs(t0),
+                    end: cs_to_secs(t1),
+                };
+                align_segment_to_speech(pcm, &mut segment, &mut segment_words);
+                normalize_word_timings(&segment, &mut segment_words);
+                segments.push(segment);
+                words.extend(segment_words);
+            }
         }
 
         let language = opts
@@ -156,10 +361,116 @@ impl Transcriber for WhisperTranscriber {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::decode::pcm::{PcmFormat, PcmSpec};
 
     #[test]
     fn centiseconds_convert_to_seconds() {
         assert!((cs_to_secs(150) - 1.5).abs() < 1e-9);
         assert_eq!(cs_to_secs(0), 0.0);
     }
+
+    fn pcm(samples: Vec<f32>, sample_rate: u32) -> PcmBuffer {
+        PcmBuffer {
+            spec: PcmSpec {
+                sample_rate,
+                channels: 1,
+                format: PcmFormat::F32,
+            },
+            samples_f32: samples,
+        }
+    }
+
+    fn word(text: &str, start: f64, end: f64) -> TranscriptionWord {
+        TranscriptionWord {
+            text: text.into(),
+            start: Some(start),
+            end: Some(end),
+        }
+    }
+
+    #[test]
+    fn silent_segment_edges_are_trimmed_and_words_remapped() {
+        let sample_rate = 1_000;
+        let mut samples = vec![0.0; 2 * sample_rate as usize];
+        samples.extend(vec![0.5; 6 * sample_rate as usize]);
+        samples.extend(vec![0.0; 2 * sample_rate as usize]);
+        let pcm = pcm(samples, sample_rate);
+        let mut segment = TranscriptionSegment {
+            text: "one two three".into(),
+            start: 0.0,
+            end: 10.0,
+        };
+        let mut words = vec![
+            word("one", 1.0, 2.0),
+            word("two", 4.0, 5.0),
+            word("three", 8.0, 9.0),
+        ];
+
+        align_segment_to_speech(&pcm, &mut segment, &mut words);
+
+        assert!((segment.start - 1.96).abs() < 0.02, "{:?}", segment);
+        assert!((segment.end - 8.05).abs() < 0.02, "{:?}", segment);
+        assert!(words[0].start.unwrap() >= segment.start);
+        assert!(words[2].end.unwrap() <= segment.end);
+        assert!(words.windows(2).all(|pair| {
+            pair[0].start.unwrap() <= pair[1].start.unwrap()
+                && pair[0].end.unwrap() <= pair[1].end.unwrap()
+        }));
+    }
+
+    #[test]
+    fn fully_audible_segment_keeps_original_timestamps() {
+        let pcm = pcm(vec![0.5; 2_000], 1_000);
+        let mut segment = TranscriptionSegment {
+            text: "hello".into(),
+            start: 0.0,
+            end: 2.0,
+        };
+        let mut words = vec![word("hello", 0.2, 1.8)];
+
+        align_segment_to_speech(&pcm, &mut segment, &mut words);
+
+        assert_eq!(segment.start, 0.0);
+        assert_eq!(segment.end, 2.0);
+        assert_eq!(words[0].start, Some(0.2));
+        assert_eq!(words[0].end, Some(1.8));
+    }
+
+    #[test]
+    fn zero_duration_words_receive_reviewable_non_overlapping_spans() {
+        let segment = TranscriptionSegment {
+            text: "Um, today. You know.".into(),
+            start: 4.8,
+            end: 12.5,
+        };
+        let mut words = vec![
+            word("Um", 5.0, 5.0),
+            word(",", 5.0, 5.2),
+            word("today", 5.2, 5.7),
+            word("You", 11.8, 11.8),
+            word("know", 11.8, 12.3),
+            word(".", 12.3, 12.4),
+        ];
+
+        normalize_word_timings(&segment, &mut words);
+
+        assert_eq!(
+            words
+                .iter()
+                .map(|word| word.text.as_str())
+                .collect::<Vec<_>>(),
+            vec!["Um", "today", "You", "know"]
+        );
+        assert_eq!(words[0].start, Some(5.0));
+        assert_eq!(words[0].end, Some(5.2));
+        assert_eq!(words[2].start, Some(11.8));
+        assert!(words[2].end.unwrap() > 11.8);
+        assert_eq!(words[2].end, words[3].start);
+        assert_eq!(words[3].end, Some(12.3));
+        assert!(words.windows(2).all(|pair| {
+            pair[0].end.unwrap() <= pair[1].start.unwrap()
+                && pair[0].end.unwrap() > pair[0].start.unwrap()
+        }));
+        assert!(words.last().unwrap().end.unwrap() > words.last().unwrap().start.unwrap());
+    }
 }
diff --git a/crates/opentake-media/tests/denoise.rs b/crates/opentake-media/tests/denoise.rs
new file mode 100644
index 00000000..42426ebe
--- /dev/null
+++ b/crates/opentake-media/tests/denoise.rs
@@ -0,0 +1,117 @@
+use opentake_domain::{AudioDenoise, DenoiseMode};
+use opentake_media::analysis::{denoise_interleaved, DenoiseError};
+use opentake_media::MediaCancelToken;
+
+const SAMPLE_RATE: u32 = 48_000;
+
+fn speech_fixture(seconds: usize) -> Vec<f32> {
+    (0..SAMPLE_RATE as usize * seconds)
+        .map(|index| {
+            let time = index as f32 / SAMPLE_RATE as f32;
+            let phrase = if (time * 2.5).fract() < 0.68 {
+                1.0
+            } else {
+                0.0
+            };
+            let attack = ((time * 2.5).fract() * 12.0).min(1.0);
+            phrase
+                * attack
+                * ((std::f32::consts::TAU * 173.0 * time).sin() * 0.24
+                    + (std::f32::consts::TAU * 346.0 * time).sin() * 0.08
+                    + (std::f32::consts::TAU * 691.0 * time).sin() * 0.035)
+        })
+        .collect()
+}
+
+fn noisy_fixture(clean: &[f32]) -> Vec<f32> {
+    let mut state = 0x5eed_1234_u32;
+    clean
+        .iter()
+        .map(|sample| {
+            state ^= state << 13;
+            state ^= state >> 17;
+            state ^= state << 5;
+            let white = (state as f64 / u32::MAX as f64 * 2.0 - 1.0) as f32;
+            sample + white * 0.075
+        })
+        .collect()
+}
+
+fn snr_db(clean: &[f32], candidate: &[f32]) -> f64 {
+    let signal = clean
+        .iter()
+        .map(|value| f64::from(*value).powi(2))
+        .sum::<f64>();
+    let error = clean
+        .iter()
+        .zip(candidate)
+        .map(|(expected, actual)| f64::from(*actual - *expected).powi(2))
+        .sum::<f64>();
+    10.0 * (signal / error.max(1.0e-20)).log10()
+}
+
+#[test]
+fn deterministic_noise_fixture_and_bypass() {
+    let clean = speech_fixture(5);
+    let noisy = noisy_fixture(&clean);
+    let source_before = noisy.clone();
+    let config = AudioDenoise {
+        mode: DenoiseMode::Adaptive,
+        strength: 0.9,
+        preview_enabled: true,
+    };
+    let processed = denoise_interleaved(
+        &noisy,
+        1,
+        SAMPLE_RATE,
+        config,
+        &MediaCancelToken::new(),
+        None,
+    )
+    .expect("denoise deterministic fixture");
+
+    let input_snr = snr_db(&clean, &noisy);
+    let output_snr = snr_db(&clean, &processed);
+    assert!(
+        output_snr >= input_snr + 3.0,
+        "input SNR={input_snr:.2} dB output SNR={output_snr:.2} dB"
+    );
+    assert!(processed.iter().all(|sample| sample.abs() <= 1.0));
+    let input_peak = noisy
+        .iter()
+        .map(|sample| sample.abs())
+        .fold(0.0_f32, f32::max);
+    let output_peak = processed
+        .iter()
+        .map(|sample| sample.abs())
+        .fold(0.0_f32, f32::max);
+    assert!(
+        output_peak <= input_peak + 1.0e-6,
+        "denoise must not introduce a new peak: input={input_peak:.6} output={output_peak:.6}"
+    );
+    assert_eq!(
+        noisy, source_before,
+        "processing must not mutate source PCM"
+    );
+
+    let bypass = denoise_interleaved(
+        &noisy,
+        1,
+        SAMPLE_RATE,
+        AudioDenoise {
+            strength: 0.0,
+            ..config
+        },
+        &MediaCancelToken::new(),
+        None,
+    )
+    .expect("bypass");
+    assert_eq!(bypass, noisy, "zero strength is a bit-exact bypass");
+
+    let cancelled = MediaCancelToken::new();
+    cancelled.cancel();
+    assert!(matches!(
+        denoise_interleaved(&noisy, 1, SAMPLE_RATE, config, &cancelled, None),
+        Err(DenoiseError::Cancelled)
+    ));
+}
diff --git a/crates/opentake-media/tests/facade_contract.rs b/crates/opentake-media/tests/facade_contract.rs
new file mode 100644
index 00000000..7fd1876f
--- /dev/null
+++ b/crates/opentake-media/tests/facade_contract.rs
@@ -0,0 +1,161 @@
+use std::path::{Path, PathBuf};
+use std::process::{Command, Stdio};
+
+use opentake_media::{
+    AssetIndex, ExportPreset, ExportResolution, FrameRequest, Header, MediaEngine, PcmBuffer,
+    PcmFormat, PcmSpec, Row, TranscribeOptions, Transcriber, TranscriptionResult, VideoCodec,
+};
+
+struct FixtureTranscriber;
+
+impl Transcriber for FixtureTranscriber {
+    fn transcribe_pcm(
+        &self,
+        pcm: &PcmBuffer,
+        _opts: &TranscribeOptions,
+    ) -> opentake_media::Result<TranscriptionResult> {
+        Ok(TranscriptionResult {
+            text: format!("{} samples", pcm.samples_f32.len()),
+            language: Some("en".into()),
+            words: vec![],
+            segments: vec![],
+        })
+    }
+}
+
+fn manifest(crate_name: &str) -> String {
+    let workspace = Path::new(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .and_then(Path::parent)
+        .expect("media crate belongs to the workspace");
+    std::fs::read_to_string(workspace.join("crates").join(crate_name).join("Cargo.toml"))
+        .expect("read workspace crate manifest")
+}
+
+fn make_av_fixture(path: &Path) -> bool {
+    Command::new("ffmpeg")
+        .args([
+            "-v",
+            "error",
+            "-f",
+            "lavfi",
+            "-i",
+            "color=c=0x336699:s=32x18:r=4",
+            "-f",
+            "lavfi",
+            "-i",
+            "sine=frequency=440:sample_rate=16000",
+            "-t",
+            "1",
+            "-c:v",
+            "mpeg4",
+            "-c:a",
+            "aac",
+            "-y",
+        ])
+        .arg(path)
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .status()
+        .is_ok_and(|status| status.success())
+}
+
+#[test]
+fn all_services_are_reachable_only_through_facade_and_dependencies_stay_acyclic() {
+    // The production dependency direction is domain <- media. Neither the
+    // zero-IO domain leaf nor media imports core/render back upward; render may
+    // consume media at its adapter/test boundary without creating a cycle.
+    let media_manifest = manifest("opentake-media");
+    let domain_manifest = manifest("opentake-domain");
+    let render_manifest = manifest("opentake-render");
+    let core_manifest = manifest("opentake-core");
+    assert!(media_manifest.contains("opentake-domain = { workspace = true }"));
+    assert!(!media_manifest.contains("opentake-core"));
+    assert!(!media_manifest.contains("opentake-render"));
+    assert!(!domain_manifest.contains("opentake-media"));
+    assert!(render_manifest.contains("opentake-media = { workspace = true }"));
+    assert!(!core_manifest.contains("opentake-render"));
+
+    let temp = tempfile::tempdir().unwrap();
+    let engine = MediaEngine::new(temp.path().join("cache"), temp.path().join("models"));
+
+    // Search is a real facade operation over the persisted index value model.
+    let indexes = vec![(
+        "asset-a".to_string(),
+        AssetIndex {
+            header: Header {
+                model: "fixture".into(),
+                model_version: 1,
+                sampler_version: 1,
+                dim: 2,
+                count: 1,
+            },
+            rows: vec![Row {
+                time: 0.25,
+                shot_start: 0.0,
+                shot_end: 1.0,
+            }],
+            vectors: vec![1.0, 0.0],
+        },
+    )];
+    let hits = engine.search_visual(&[1.0, 0.0], &indexes, 20, 0.85, Some(0.05));
+    assert_eq!(hits.len(), 1);
+    assert_eq!(hits[0].asset_id, "asset-a");
+
+    // The exact IO methods must compile on every platform. Environments without
+    // ffmpeg stop after the pure dependency/search assertions.
+    let source = temp.path().join("facade-source.mp4");
+    if !make_av_fixture(&source) {
+        return;
+    }
+
+    let probe = engine.probe(&source).unwrap();
+    assert_eq!((probe.width, probe.height), (Some(32), Some(18)));
+    assert!(probe.has_audio && probe.has_video);
+
+    let frame = engine
+        .decode_frame(
+            &source,
+            &FrameRequest {
+                time_secs: 0.25,
+                max_size: (32, 18),
+                tolerance_secs: 0.25,
+                apply_rotation: true,
+            },
+        )
+        .unwrap()
+        .1;
+    assert_eq!((frame.width, frame.height), (32, 18));
+
+    let pcm_spec = PcmSpec {
+        sample_rate: 16_000,
+        channels: 1,
+        format: PcmFormat::F32,
+    };
+    let pcm = engine.extract_pcm(&source, &pcm_spec, None).unwrap();
+    assert_eq!(pcm.spec, pcm_spec);
+    assert!((15_000..=16_500).contains(&pcm.samples_f32.len()));
+
+    let transcript_cache = opentake_media::TranscriptCache::new(temp.path().join("cache"));
+    let transcript = engine
+        .transcribe(&source, true, None, &FixtureTranscriber, &transcript_cache)
+        .unwrap();
+    assert!(transcript.text.ends_with(" samples"));
+
+    let encoded = temp.path().join("facade-encoded.mp4");
+    let mut encoder = engine
+        .video_encoder(
+            &encoded,
+            32,
+            18,
+            4,
+            &ExportPreset::new(VideoCodec::H264, ExportResolution::P720),
+        )
+        .unwrap();
+    encoder.push_frame(&frame).unwrap();
+    encoder.finish().unwrap();
+    assert!(encoded.is_file());
+    assert!(engine.probe(&encoded).unwrap().has_video);
+
+    let _: PathBuf = engine.cache_root().to_path_buf();
+}
diff --git a/crates/opentake-media/tests/ffmpeg_integration.rs b/crates/opentake-media/tests/ffmpeg_integration.rs
index 6fbb169a..72ea035b 100644
--- a/crates/opentake-media/tests/ffmpeg_integration.rs
+++ b/crates/opentake-media/tests/ffmpeg_integration.rs
@@ -14,7 +14,7 @@ use opentake_media::decode::spawn_video_stream;
 use opentake_media::ffmpeg_status::{ffmpeg_available, ffprobe_available};
 use opentake_media::{
     decode_frame_at, encode, extract_pcm, probe, video_thumbnails, waveform, ExportPreset,
-    ExportResolution, FrameRequest, PcmFormat, PcmSpec, VideoCodec, VideoEncoder,
+    ExportResolution, FrameRequest, PcmFormat, PcmSpec, RgbaFrame, VideoCodec, VideoEncoder,
     VideoStreamRequest,
 };
 
@@ -426,6 +426,46 @@ fn encode_prores_roundtrip_produces_prores_mov() {
     encode_codec_roundtrip(VideoCodec::ProRes422, "mov", "prores");
 }
 
+#[test]
+fn prores_4444_roundtrip_preserves_alpha_plane() {
+    if !ffmpeg_available() || !ffprobe_available() {
+        eprintln!("SKIP: ffmpeg/ffprobe unavailable");
+        return;
+    }
+    let root = tempfile::tempdir().unwrap();
+    let output = root.path().join("alpha.mov");
+    let preset = ExportPreset::new(VideoCodec::ProRes4444, ExportResolution::P720);
+    let mut encoder = VideoEncoder::new(&output, 2, 2, 1, &preset).unwrap();
+    encoder
+        .push_frame(&RgbaFrame {
+            width: 2,
+            height: 2,
+            rgba: vec![
+                255, 0, 0, 0, 0, 255, 0, 85, 0, 0, 255, 170, 255, 255, 255, 255,
+            ],
+        })
+        .unwrap();
+    encoder.finish().unwrap();
+    let decoded = decode_frame_at(
+        &output,
+        &FrameRequest {
+            max_size: (2, 2),
+            tolerance_secs: 0.0,
+            ..FrameRequest::default()
+        },
+    )
+    .unwrap()
+    .1;
+    let alpha = decoded
+        .rgba
+        .chunks_exact(4)
+        .map(|pixel| pixel[3])
+        .collect::<Vec<_>>();
+    for (actual, expected) in alpha.iter().zip([0_u8, 85, 170, 255]) {
+        assert!(actual.abs_diff(expected) <= 3, "{alpha:?}");
+    }
+}
+
 #[test]
 #[ignore = "requires OPENTAKE_MAIN10_FIXTURE pointing at a real HEVC Main10 clip"]
 fn continuous_decode_scales_real_main10_frames_without_corruption() {
diff --git a/crates/opentake-media/tests/hdr.rs b/crates/opentake-media/tests/hdr.rs
new file mode 100644
index 00000000..8b40a438
--- /dev/null
+++ b/crates/opentake-media/tests/hdr.rs
@@ -0,0 +1,173 @@
+use opentake_domain::MediaColorMetadata;
+use opentake_media::{
+    decode_frame_at, hdr_tonemap_filter, parse_probe, probe, ExportPreset, ExportResolution,
+    FrameRequest, VideoCodec, VideoEncoder,
+};
+use serde_json::json;
+
+#[test]
+fn hdr_probe_and_sdr_delivery_policy_preserve_source_metadata() {
+    for (transfer, expected_token) in [("smpte2084", "smpte2084"), ("arib-std-b67", "arib-std-b67")]
+    {
+        let probe = parse_probe(&json!({
+            "streams": [{
+                "codec_type": "video",
+                "width": 3840,
+                "height": 2160,
+                "avg_frame_rate": "30/1",
+                "color_primaries": "bt2020",
+                "color_transfer": transfer,
+                "color_space": "bt2020nc",
+                "color_range": "tv"
+            }],
+            "format": {"duration": "5.0"}
+        }));
+
+        let color = probe.color.expect("HDR metadata must survive probing");
+        assert_eq!(
+            color,
+            MediaColorMetadata {
+                primaries: Some("bt2020".into()),
+                transfer: Some(transfer.into()),
+                matrix: Some("bt2020nc".into()),
+                range: Some("tv".into()),
+            }
+        );
+        assert!(color.is_hdr());
+        let filter = hdr_tonemap_filter(&color).expect("PQ/HLG must choose an explicit tonemap");
+        if cfg!(target_os = "macos") {
+            assert!(filter.contains("scale_vt="));
+            assert!(filter.contains("color_transfer=bt709"));
+            assert!(filter.contains("hwdownload,format=p010le"));
+        } else {
+            assert!(filter.contains(expected_token));
+            assert!(filter.contains("tonemap="));
+            assert!(filter.contains("p=bt709:t=bt709:m=bt709"));
+        }
+    }
+
+    let preset = ExportPreset::new(VideoCodec::H265, ExportResolution::P1080);
+    let args = preset.color_args();
+    assert!(args
+        .windows(2)
+        .any(|pair| pair == ["-color_primaries", "bt709"]));
+    assert!(args.windows(2).any(|pair| pair == ["-color_trc", "bt709"]));
+    assert!(args.windows(2).any(|pair| pair == ["-colorspace", "bt709"]));
+}
+
+#[test]
+fn sdr_or_unknown_transfer_does_not_apply_hdr_tonemapping() {
+    let sdr = MediaColorMetadata {
+        primaries: Some("bt709".into()),
+        transfer: Some("bt709".into()),
+        matrix: Some("bt709".into()),
+        range: Some("tv".into()),
+    };
+    assert!(!sdr.is_hdr());
+    assert_eq!(hdr_tonemap_filter(&sdr), None);
+    assert_eq!(hdr_tonemap_filter(&MediaColorMetadata::default()), None);
+}
+
+#[test]
+fn packaged_hdr_decode_path_materializes_bt709_rgba_pixels() {
+    if !opentake_media::ffmpeg_status::ffmpeg_available()
+        || !opentake_media::ffmpeg_status::ffprobe_available()
+    {
+        return;
+    }
+    let temp = tempfile::tempdir().unwrap();
+    let source = temp.path().join("pq.mp4");
+    let generated = std::process::Command::new("ffmpeg")
+        .args([
+            "-hide_banner",
+            "-loglevel",
+            "error",
+            "-y",
+            "-f",
+            "lavfi",
+            "-i",
+            "testsrc2=size=160x90:rate=24",
+            "-frames:v",
+            "1",
+            "-vf",
+            "format=yuv420p10le",
+            "-c:v",
+            "libx265",
+            "-preset",
+            "ultrafast",
+            "-x265-params",
+            "log-level=error:hdr-opt=1:repeat-headers=1:colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc",
+            "-color_primaries",
+            "bt2020",
+            "-color_trc",
+            "smpte2084",
+            "-colorspace",
+            "bt2020nc",
+        ])
+        .arg(&source)
+        .output()
+        .unwrap();
+    assert!(
+        generated.status.success(),
+        "generate HDR fixture: {}",
+        String::from_utf8_lossy(&generated.stderr)
+    );
+    let metadata = probe(&source).unwrap();
+    assert!(metadata.color.as_ref().is_some_and(|color| color.is_hdr()));
+
+    let (_, frame) = decode_frame_at(
+        &source,
+        &FrameRequest {
+            time_secs: 0.0,
+            max_size: (160, 90),
+            ..FrameRequest::default()
+        },
+    )
+    .expect("platform HDR conversion must decode to RGBA");
+    assert_eq!((frame.width, frame.height), (160, 90));
+    let (min, max) = frame
+        .rgba
+        .chunks_exact(4)
+        .flat_map(|pixel| pixel[..3].iter().copied())
+        .fold((u8::MAX, u8::MIN), |(min, max), value| {
+            (min.min(value), max.max(value))
+        });
+    assert!(
+        max.saturating_sub(min) > 32,
+        "tone-mapped frame must retain contrast"
+    );
+
+    let delivered = temp.path().join("delivery.mp4");
+    let preset = ExportPreset::new(VideoCodec::H264, ExportResolution::P720);
+    let mut encoder = VideoEncoder::new(&delivered, frame.width, frame.height, 1, &preset).unwrap();
+    encoder.push_frame(&frame).unwrap();
+    encoder.finish().unwrap();
+    let tags = std::process::Command::new("ffprobe")
+        .args([
+            "-v",
+            "error",
+            "-select_streams",
+            "v:0",
+            "-show_entries",
+            "stream=color_primaries,color_transfer,color_space",
+            "-of",
+            "json",
+        ])
+        .arg(&delivered)
+        .output()
+        .unwrap();
+    assert!(tags.status.success());
+    let tags: serde_json::Value = serde_json::from_slice(&tags.stdout).unwrap();
+    assert_eq!(
+        tags.pointer("/streams/0/color_primaries"),
+        Some(&json!("bt709"))
+    );
+    assert_eq!(
+        tags.pointer("/streams/0/color_transfer"),
+        Some(&json!("bt709"))
+    );
+    assert_eq!(
+        tags.pointer("/streams/0/color_space"),
+        Some(&json!("bt709"))
+    );
+}
diff --git a/crates/opentake-media/tests/loudness.rs b/crates/opentake-media/tests/loudness.rs
new file mode 100644
index 00000000..c436e955
--- /dev/null
+++ b/crates/opentake-media/tests/loudness.rs
@@ -0,0 +1,107 @@
+use opentake_media::analysis::{
+    analyze_loudness, apply_loudness_gain, LoudnessNormalizationConfig,
+};
+use opentake_media::encode::mix::apply_true_peak_ceiling;
+
+const SAMPLE_RATE: u32 = 48_000;
+
+fn sine_fixture(amplitude: f32, frequency_hz: f32, duration_seconds: usize) -> Vec<f32> {
+    let sample_count = SAMPLE_RATE as usize * duration_seconds;
+    (0..sample_count)
+        .map(|index| {
+            let phase = index as f32 * frequency_hz * std::f32::consts::TAU / SAMPLE_RATE as f32;
+            phase.sin() * amplitude
+        })
+        .collect()
+}
+
+#[test]
+fn normalization_reaches_configured_lufs_within_tolerance() {
+    let samples = sine_fixture(0.08, 997.0, 4);
+    let config = LoudnessNormalizationConfig {
+        target_lufs: -16.0,
+        true_peak_ceiling_dbtp: -1.0,
+    };
+
+    let analysis = analyze_loudness(&samples, SAMPLE_RATE, config).expect("analyze fixture");
+    // Cross-checked against FFmpeg 8.1 loudnorm for the same 997 Hz / 0.08
+    // amplitude / 48 kHz fixture (`input_i=-24.95`, `input_tp=-21.94`).
+    assert!((analysis.input_integrated_lufs - -24.95).abs() <= 0.2);
+    assert!((analysis.input_true_peak_dbtp - -21.94).abs() <= 0.1);
+    let normalized = apply_loudness_gain(&samples, analysis.gain_db);
+    let measured = analyze_loudness(
+        &normalized,
+        SAMPLE_RATE,
+        LoudnessNormalizationConfig {
+            target_lufs: analysis.output_integrated_lufs,
+            true_peak_ceiling_dbtp: 0.0,
+        },
+    )
+    .expect("measure normalized fixture");
+
+    assert!(
+        (measured.input_integrated_lufs - config.target_lufs).abs() <= 1.0,
+        "measured={} target={} gain={} input={} peak={}",
+        measured.input_integrated_lufs,
+        config.target_lufs,
+        analysis.gain_db,
+        analysis.input_integrated_lufs,
+        measured.input_true_peak_dbtp,
+    );
+    assert!(measured.input_true_peak_dbtp <= config.true_peak_ceiling_dbtp + 0.05);
+}
+
+fn verify_program_fixture(mut samples: Vec<f32>) {
+    let config = LoudnessNormalizationConfig::default();
+    let analysis = analyze_loudness(&samples, SAMPLE_RATE, config).expect("analyze fixture");
+    samples = apply_loudness_gain(&samples, analysis.gain_db);
+    apply_true_peak_ceiling(&mut samples, Some(config.true_peak_ceiling_dbtp));
+    let measured = analyze_loudness(&samples, SAMPLE_RATE, config).expect("measure output");
+    assert!(
+        (measured.input_integrated_lufs - config.target_lufs).abs() <= 1.0,
+        "measured={} target={} gain={} input={} peak={}",
+        measured.input_integrated_lufs,
+        config.target_lufs,
+        analysis.gain_db,
+        analysis.input_integrated_lufs,
+        measured.input_true_peak_dbtp,
+    );
+    assert!(measured.input_true_peak_dbtp <= config.true_peak_ceiling_dbtp + 0.05);
+}
+
+#[test]
+fn speech_and_music_fixtures_reach_target_without_exceeding_true_peak() {
+    let sample_count = SAMPLE_RATE as usize * 5;
+    let speech = (0..sample_count)
+        .map(|index| {
+            let time = index as f32 / SAMPLE_RATE as f32;
+            let syllable = if (time * 3.2).fract() < 0.62 {
+                1.0
+            } else {
+                0.08
+            };
+            let voiced = (std::f32::consts::TAU * 173.0 * time).sin() * 0.035
+                + (std::f32::consts::TAU * 346.0 * time).sin() * 0.018;
+            let plosive = if index % 31_337 < 12 { 0.72 } else { 0.0 };
+            voiced * syllable + plosive
+        })
+        .collect();
+    verify_program_fixture(speech);
+
+    let music = (0..sample_count)
+        .map(|index| {
+            let time = index as f32 / SAMPLE_RATE as f32;
+            let tonal = (std::f32::consts::TAU * 220.0 * time).sin() * 0.045
+                + (std::f32::consts::TAU * 329.63 * time).sin() * 0.035
+                + (std::f32::consts::TAU * 440.0 * time).sin() * 0.025;
+            let beat_phase = index % (SAMPLE_RATE as usize / 2);
+            let beat = if beat_phase < 240 {
+                0.35 * (1.0 - beat_phase as f32 / 240.0)
+            } else {
+                0.0
+            };
+            tonal + beat
+        })
+        .collect();
+    verify_program_fixture(music);
+}
diff --git a/crates/opentake-media/tests/proxy.rs b/crates/opentake-media/tests/proxy.rs
new file mode 100644
index 00000000..c1aa9f8c
--- /dev/null
+++ b/crates/opentake-media/tests/proxy.rs
@@ -0,0 +1,104 @@
+use std::fs;
+use std::path::Path;
+use std::sync::{Arc, Mutex};
+
+use opentake_media::{
+    create_proxy, probe, MediaCancelToken, MediaError, ProxyProgressCallback, ProxyRequest,
+};
+
+fn make_video(path: &Path) {
+    let status = std::process::Command::new("ffmpeg")
+        .args([
+            "-hide_banner",
+            "-loglevel",
+            "error",
+            "-y",
+            "-f",
+            "lavfi",
+            "-i",
+            "testsrc2=size=640x360:rate=30",
+            "-f",
+            "lavfi",
+            "-i",
+            "sine=frequency=440:sample_rate=48000",
+            "-t",
+            "1",
+            "-c:v",
+            "libx264",
+            "-pix_fmt",
+            "yuv420p",
+            "-c:a",
+            "aac",
+        ])
+        .arg(path)
+        .status()
+        .expect("spawn ffmpeg fixture");
+    assert!(status.success());
+}
+
+#[test]
+fn proxy_creation_is_cancellable_atomic_persistent_and_source_preserving() {
+    if !opentake_media::ffmpeg_status::ffmpeg_available()
+        || !opentake_media::ffmpeg_status::ffprobe_available()
+    {
+        return;
+    }
+    let temp = tempfile::tempdir().unwrap();
+    let source = temp.path().join("source.mp4");
+    let output = temp.path().join("media/proxies/source-proxy.mp4");
+    make_video(&source);
+    let source_before = fs::read(&source).unwrap();
+    let progress_values = Arc::new(Mutex::new(Vec::new()));
+    let capture = progress_values.clone();
+    let progress: ProxyProgressCallback = Arc::new(move |done, total| {
+        capture.lock().unwrap().push((done, total));
+    });
+
+    let result = create_proxy(
+        ProxyRequest {
+            source: &source,
+            output: &output,
+            max_size: (320, 180),
+        },
+        &MediaCancelToken::new(),
+        Some(progress),
+    )
+    .expect("create bounded proxy");
+
+    assert_eq!(result.path, output);
+    assert_eq!(result.width, 320);
+    assert_eq!(result.height, 180);
+    assert_eq!(result.source_sha256.len(), 64);
+    assert_eq!(fs::read(&source).unwrap(), source_before);
+    let proxy_probe = probe(&output).unwrap();
+    assert_eq!(
+        (proxy_probe.width, proxy_probe.height),
+        (Some(320), Some(180))
+    );
+    assert!(proxy_probe.has_video && proxy_probe.has_audio);
+    let values = progress_values.lock().unwrap();
+    assert_eq!(values.first().copied(), Some((0, 1000)));
+    assert_eq!(values.last().copied(), Some((1000, 1000)));
+    assert!(!temp
+        .path()
+        .join("media/proxies/source-proxy.mp4.partial")
+        .exists());
+
+    let cancelled = temp.path().join("media/proxies/cancelled.mp4");
+    let cancel = MediaCancelToken::new();
+    cancel.cancel();
+    assert!(matches!(
+        create_proxy(
+            ProxyRequest {
+                source: &source,
+                output: &cancelled,
+                max_size: (320, 180),
+            },
+            &cancel,
+            None,
+        ),
+        Err(MediaError::Cancelled)
+    ));
+    assert!(!cancelled.exists());
+    assert!(!cancelled.with_extension("mp4.partial").exists());
+}
diff --git a/crates/opentake-media/tests/stems.rs b/crates/opentake-media/tests/stems.rs
new file mode 100644
index 00000000..51e0af6c
--- /dev/null
+++ b/crates/opentake-media/tests/stems.rs
@@ -0,0 +1,219 @@
+use std::fs;
+use std::path::Path;
+use std::sync::Arc;
+
+use opentake_media::analysis::stems::{
+    ensure_local_stem_model, separate_stems, verify_local_stem_model, StemExecution,
+    StemProgressCallback, StemSeparationRequest,
+};
+use opentake_media::{MediaCancelToken, MediaError};
+use tempfile::TempDir;
+
+const SAMPLE_RATE: u32 = 48_000;
+const FRAMES: usize = 48_000;
+
+fn write_stereo_fixture(path: &Path) {
+    let data_len = (FRAMES * 2 * 2) as u32;
+    let mut wav = Vec::with_capacity(44 + data_len as usize);
+    wav.extend_from_slice(b"RIFF");
+    wav.extend_from_slice(&(36 + data_len).to_le_bytes());
+    wav.extend_from_slice(b"WAVEfmt ");
+    wav.extend_from_slice(&16_u32.to_le_bytes());
+    wav.extend_from_slice(&1_u16.to_le_bytes());
+    wav.extend_from_slice(&2_u16.to_le_bytes());
+    wav.extend_from_slice(&SAMPLE_RATE.to_le_bytes());
+    wav.extend_from_slice(&(SAMPLE_RATE * 4).to_le_bytes());
+    wav.extend_from_slice(&4_u16.to_le_bytes());
+    wav.extend_from_slice(&16_u16.to_le_bytes());
+    wav.extend_from_slice(b"data");
+    wav.extend_from_slice(&data_len.to_le_bytes());
+    for frame in 0..FRAMES {
+        let t = frame as f32 / SAMPLE_RATE as f32;
+        let vocal = 0.28 * (std::f32::consts::TAU * 440.0 * t).sin();
+        let music = 0.22 * (std::f32::consts::TAU * 997.0 * t).sin();
+        for sample in [vocal + music, vocal - music] {
+            wav.extend_from_slice(&((sample.clamp(-1.0, 1.0) * 32767.0) as i16).to_le_bytes());
+        }
+    }
+    fs::write(path, wav).expect("write deterministic stereo fixture");
+}
+
+fn assert_clean_output_dir(path: &Path) {
+    let entries = fs::read_dir(path)
+        .expect("read output directory")
+        .collect::<Result<Vec<_>, _>>()
+        .expect("collect output directory");
+    assert!(
+        entries.is_empty(),
+        "cancelled job must clean partial outputs"
+    );
+}
+
+#[test]
+fn local_or_explicit_provider_selection_cancellation_provenance_and_cleanup() {
+    let temp = TempDir::new().expect("temp root");
+    let source = temp.path().join("center-vocal.wav");
+    let models = temp.path().join("models");
+    let outputs = temp.path().join("outputs");
+    write_stereo_fixture(&source);
+    fs::create_dir_all(&outputs).expect("create outputs");
+
+    let installed = ensure_local_stem_model(&models).expect("install bundled local model");
+    assert!(installed.path.is_file());
+    assert_eq!(verify_local_stem_model(&models).unwrap(), installed);
+
+    let progress_values = Arc::new(std::sync::Mutex::new(Vec::new()));
+    let progress_capture = progress_values.clone();
+    let progress: StemProgressCallback = Arc::new(move |done, total| {
+        progress_capture.lock().unwrap().push((done, total));
+    });
+    let result = separate_stems(
+        StemSeparationRequest {
+            source: &source,
+            output_dir: &outputs,
+            execution: StemExecution::Local { model_dir: &models },
+        },
+        &MediaCancelToken::new(),
+        Some(progress),
+    )
+    .expect("separate local stems");
+
+    assert!(result.vocals.path.is_file());
+    assert!(result.accompaniment.path.is_file());
+    assert_eq!(result.provenance.execution, "local:opentake-center-v1");
+    assert_eq!(result.provenance.source_sha256.len(), 64);
+    assert_eq!(
+        result.provenance.model_sha256,
+        Some(installed.sha256.clone())
+    );
+    assert!(result.metrics.vocal_sdr_improvement_db >= 12.0);
+    let spec = opentake_media::PcmSpec {
+        sample_rate: SAMPLE_RATE,
+        channels: 2,
+        format: opentake_media::PcmFormat::F32,
+    };
+    let mixture = opentake_media::decode_pcm_interleaved(&source, &spec, None).unwrap();
+    let separated_vocals =
+        opentake_media::decode_pcm_interleaved(&result.vocals.path, &spec, None).unwrap();
+    let separated_accompaniment =
+        opentake_media::decode_pcm_interleaved(&result.accompaniment.path, &spec, None).unwrap();
+    let mut reference = Vec::with_capacity(FRAMES * 2);
+    let mut accompaniment_reference = Vec::with_capacity(FRAMES * 2);
+    for frame in 0..FRAMES {
+        let t = frame as f32 / SAMPLE_RATE as f32;
+        let vocal = 0.28 * (std::f32::consts::TAU * 440.0 * t).sin();
+        let music = 0.22 * (std::f32::consts::TAU * 997.0 * t).sin();
+        reference.extend_from_slice(&[vocal, vocal]);
+        // A user-facing accompaniment stem must remain audible after a mono
+        // export/downmix, so the isolated side signal is emitted dual-mono.
+        accompaniment_reference.extend_from_slice(&[music, music]);
+    }
+    let sdr = |candidate: &[f32]| {
+        let signal = reference
+            .iter()
+            .map(|sample| f64::from(*sample) * f64::from(*sample))
+            .sum::<f64>();
+        let error = reference
+            .iter()
+            .zip(candidate)
+            .map(|(expected, actual)| {
+                let delta = f64::from(*expected - *actual);
+                delta * delta
+            })
+            .sum::<f64>()
+            .max(1.0e-12);
+        10.0 * (signal / error).log10()
+    };
+    let measured_improvement = sdr(&separated_vocals) - sdr(&mixture);
+    assert!(
+        measured_improvement >= 12.0,
+        "decoded vocals must improve SDR by >= 12 dB, got {measured_improvement:.3} dB"
+    );
+    let accompaniment_signal = accompaniment_reference
+        .iter()
+        .map(|sample| f64::from(*sample) * f64::from(*sample))
+        .sum::<f64>();
+    let accompaniment_error = accompaniment_reference
+        .iter()
+        .zip(&separated_accompaniment)
+        .map(|(expected, actual)| {
+            let delta = f64::from(*expected - *actual);
+            delta * delta
+        })
+        .sum::<f64>()
+        .max(1.0e-12);
+    let accompaniment_sdr = 10.0 * (accompaniment_signal / accompaniment_error).log10();
+    assert!(
+        accompaniment_sdr >= 60.0,
+        "decoded accompaniment must be mono-compatible, got {accompaniment_sdr:.3} dB SDR"
+    );
+    let mut mono_compatible_mix = Vec::with_capacity(FRAMES * 2);
+    for frame in 0..FRAMES {
+        let t = frame as f32 / SAMPLE_RATE as f32;
+        let vocal = 0.28 * (std::f32::consts::TAU * 440.0 * t).sin();
+        let music = 0.22 * (std::f32::consts::TAU * 997.0 * t).sin();
+        mono_compatible_mix.extend_from_slice(&[vocal + music, vocal + music]);
+    }
+    let reconstruction_signal = mono_compatible_mix
+        .iter()
+        .map(|sample| f64::from(*sample) * f64::from(*sample))
+        .sum::<f64>();
+    let reconstruction_error = mono_compatible_mix
+        .iter()
+        .zip(separated_vocals.iter().zip(&separated_accompaniment))
+        .map(|(expected, (vocals, accompaniment))| {
+            let delta = f64::from(*expected - (*vocals + *accompaniment));
+            delta * delta
+        })
+        .sum::<f64>()
+        .max(1.0e-12);
+    let reconstruction_sdr = 10.0 * (reconstruction_signal / reconstruction_error).log10();
+    assert!(
+        reconstruction_sdr >= 60.0,
+        "stem sum must reconstruct the documented mono-compatible mixture at >= 60 dB SDR, got {reconstruction_sdr:.3} dB"
+    );
+    let progress_values = progress_values.lock().unwrap();
+    assert_eq!(progress_values.first().copied(), Some((0, 1000)));
+    assert_eq!(progress_values.last().copied(), Some((1000, 1000)));
+
+    let corrupt = fs::read(&installed.path).expect("read installed model");
+    fs::write(&installed.path, [corrupt, b"corrupt".to_vec()].concat())
+        .expect("corrupt installed model");
+    assert!(matches!(
+        verify_local_stem_model(&models),
+        Err(MediaError::Checksum(_))
+    ));
+
+    let cancelled_outputs = temp.path().join("cancelled");
+    fs::create_dir_all(&cancelled_outputs).unwrap();
+    let cancel = MediaCancelToken::new();
+    cancel.cancel();
+    let cancelled = separate_stems(
+        StemSeparationRequest {
+            source: &source,
+            output_dir: &cancelled_outputs,
+            execution: StemExecution::Local { model_dir: &models },
+        },
+        &cancel,
+        None,
+    );
+    assert!(matches!(cancelled, Err(MediaError::Cancelled)));
+    assert_clean_output_dir(&cancelled_outputs);
+
+    let hosted_outputs = temp.path().join("hosted");
+    fs::create_dir_all(&hosted_outputs).unwrap();
+    let hosted = separate_stems(
+        StemSeparationRequest {
+            source: &source,
+            output_dir: &hosted_outputs,
+            execution: StemExecution::Hosted {
+                provider: "".to_string(),
+                model: "vendor/stems-v1".to_string(),
+            },
+        },
+        &MediaCancelToken::new(),
+        None,
+    );
+    assert!(matches!(hosted, Err(MediaError::ModelInstall(_))));
+    assert_clean_output_dir(&hosted_outputs);
+}
diff --git a/crates/opentake-motion/Cargo.toml b/crates/opentake-motion/Cargo.toml
index 3d206684..77dbaba4 100644
--- a/crates/opentake-motion/Cargo.toml
+++ b/crates/opentake-motion/Cargo.toml
@@ -21,6 +21,14 @@ sha2 = "0.10"
 hex = "0.4"
 thiserror = "1"
 
+# The live backend speaks Chrome DevTools Protocol directly. Both dependencies
+# are feature-gated, so the default/offline crate keeps its existing surface.
+base64 = { version = "0.22", optional = true }
+tungstenite = { version = "0.29", optional = true, default-features = false, features = ["handshake"] }
+
+[target.'cfg(unix)'.dependencies]
+libc = { version = "0.2", optional = true }
+
 [dev-dependencies]
 # Offline PNG round-trip for the stub renderer's frame-file checks (mirrors the
 # render crate's dev-dep; no network, no assets).
@@ -30,6 +38,6 @@ tempfile = "3"
 [features]
 default = []
 # Gates the real headless-Chromium (CDP) backend behind a feature so neither the
-# default build nor CI tests require a Chromium binary. The skeleton compiles
-# unconditionally; only the live CDP wiring is feature-gated (see renderer.rs).
-chromium = []
+# default build nor CI tests require a Chromium binary. Browser discovery and
+# the fail-closed API compile unconditionally; live CDP wiring is feature-gated.
+chromium = ["dep:base64", "dep:libc", "dep:tungstenite"]
diff --git a/crates/opentake-motion/src/error.rs b/crates/opentake-motion/src/error.rs
index 4f107f99..d7001e68 100644
--- a/crates/opentake-motion/src/error.rs
+++ b/crates/opentake-motion/src/error.rs
@@ -35,6 +35,11 @@ pub enum MotionError {
     #[error("render timed out after {0:?}")]
     Timeout(std::time::Duration),
 
+    /// The caller cancelled an in-flight render. Browser/profile/output cleanup
+    /// is complete before this error is returned.
+    #[error("render cancelled")]
+    Cancelled,
+
     /// A sandbox policy was violated (e.g. a disallowed network origin).
     #[error("sandbox violation: {0}")]
     Sandbox(String),
diff --git a/crates/opentake-motion/src/integration.rs b/crates/opentake-motion/src/integration.rs
index 29bd1d1e..6e21919d 100644
--- a/crates/opentake-motion/src/integration.rs
+++ b/crates/opentake-motion/src/integration.rs
@@ -11,13 +11,15 @@
 //!
 //! Decoding a frame file back to RGBA is deliberately *not* hard-wired to a PNG
 //! library here. Frames may be produced by the [`StubRenderer`](crate::renderer)
-//! (our tiny stored-block PNG), by the later native headless-Chromium fallback
+//! (our tiny stored-block PNG), by the native headless-Chromium fallback
 //! (standard PNG), by Motion Canvas image-sequence output, or by a future
 //! raw-RGBA fast path. So [`MotionClipSource`] takes a
 //! `FrameDecoder` — a `Fn(&Path) -> Option<DecodedFrame>` — supplied by the
 //! integrating layer (which already owns an image/codec stack). Tests inject the
-//! stub's own decoder; the app injects `image`/ffmpeg. This keeps this crate's
-//! default dependency surface free of a decoder while still being fully testable.
+//! stub's own decoder, and the feature-gated Chromium acceptance decodes a live
+//! browser PNG through this same boundary; the app injects `image`/ffmpeg. This
+//! keeps this crate's default dependency surface free of a decoder while still
+//! being fully testable.
 
 use std::path::Path;
 
@@ -59,6 +61,8 @@ impl<'a> MotionClipSource<'a> {
 
     /// Decode the frame at a 0-based index, clamping past-the-end to the last
     /// frame (freeze-frame hold, consistent with [`RenderedClip::frame_path`]).
+    /// Missing/corrupt input remains an absent frame (`None`); this adapter does
+    /// not repair, replace, or otherwise mutate the frame cache.
     pub fn frame(&self, frame: i64) -> Option<DecodedFrame> {
         let idx = if frame < 0 { 0usize } else { frame as usize };
         let path = self.clip.frame_path(idx)?;
@@ -167,9 +171,29 @@ mod tests {
     #[test]
     fn missing_decoder_result_is_none() {
         let (clip, _tmp) = render_clip(true);
-        // A decoder that always fails surfaces None (compositor treats as absent).
-        let src = MotionClipSource::new(clip, |_p: &Path| None);
-        assert!(src.decoded_frame("ref", 0).is_none());
+        let valid_path = clip.frames[0].clone();
+        let corrupt_path = clip.frames[1].clone();
+        let missing_path = clip.frames[2].clone();
+        let cache_dir = valid_path.parent().unwrap().to_path_buf();
+        let src = MotionClipSource::new(clip, image_decoder);
+
+        let valid = src
+            .decoded_frame("ref", 0)
+            .expect("valid frame remains decodable");
+        assert_eq!((valid.width, valid.height), (6, 4));
+
+        std::fs::write(&corrupt_path, b"not a png").unwrap();
+        std::fs::remove_file(&missing_path).unwrap();
+        let entries_before = std::fs::read_dir(&cache_dir).unwrap().count();
+
+        assert!(src.decoded_frame("ref", 1).is_none());
+        assert_eq!(std::fs::read(&corrupt_path).unwrap(), b"not a png");
+        assert!(src.decoded_frame("ref", 2).is_none());
+        assert!(!missing_path.exists());
+        assert_eq!(
+            std::fs::read_dir(&cache_dir).unwrap().count(),
+            entries_before
+        );
     }
 
     #[test]
diff --git a/crates/opentake-motion/src/lib.rs b/crates/opentake-motion/src/lib.rs
index 82b31d37..a9271649 100644
--- a/crates/opentake-motion/src/lib.rs
+++ b/crates/opentake-motion/src/lib.rs
@@ -58,7 +58,8 @@ pub use manifest::{
     DurationMode, DurationSpec, FpsPolicy, MotionPlugin, MotionPluginAuthor, ParamSpec,
 };
 pub use renderer::{
-    deterministic_clock_script, HeadlessChromiumRenderer, MotionRenderer, StubRenderer,
+    deterministic_clock_script, HeadlessChromiumRenderer, MotionCancellationToken, MotionRenderer,
+    StubRenderer,
 };
 pub use sandbox::{AllowedOrigin, SandboxPolicy};
 pub use source::{limits, MotionRenderRequest, MotionSource, ParamValue, RenderedClip};
diff --git a/crates/opentake-motion/src/renderer.rs b/crates/opentake-motion/src/renderer.rs
index d7c92d5b..591b746d 100644
--- a/crates/opentake-motion/src/renderer.rs
+++ b/crates/opentake-motion/src/renderer.rs
@@ -8,18 +8,22 @@
 //!   each frame a solid color derived from `(frame, content-hash)`. It exists so
 //!   the whole pipeline (validation → cache → frame files → compositor ingest)
 //!   is unit-testable offline with **no browser**.
-//! - [`HeadlessChromiumRenderer`] — the real backend skeleton. It documents and
-//!   sequences the deterministic CDP flow (virtual time + per-frame screenshot
-//!   with alpha, docs §3) but the live Chromium calls are gated behind the
-//!   `chromium` cargo feature. Without that feature (the default, and in CI) it
-//!   returns a clear [`MotionError::RendererUnavailable`] instead of pretending
-//!   to render.
+//! - [`HeadlessChromiumRenderer`] — the live CDP backend (virtual time +
+//!   per-frame screenshot with alpha), gated behind the `chromium` cargo
+//!   feature. Without that feature it returns a clear
+//!   [`MotionError::RendererUnavailable`].
 //!
 //! Both share [`deterministic_clock_script`] — the injected JS that freezes the
 //! page clock and exposes `OpenTake.seek(seconds)`, the render contract authors
 //! animate against.
 
+#[cfg(feature = "chromium")]
+use std::path::Path;
 use std::path::PathBuf;
+use std::sync::{
+    atomic::{AtomicBool, Ordering},
+    Arc,
+};
 
 use crate::cache::{content_hash, MotionCache};
 use crate::error::{MotionError, MotionResult};
@@ -39,6 +43,25 @@ pub trait MotionRenderer {
     fn render(&self, req: &MotionRenderRequest) -> MotionResult<RenderedClip>;
 }
 
+/// Cooperative cancellation shared between the caller and a live browser
+/// render. Cancelling is idempotent and may happen from any thread.
+#[derive(Clone, Debug, Default)]
+pub struct MotionCancellationToken(Arc<AtomicBool>);
+
+impl MotionCancellationToken {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn cancel(&self) {
+        self.0.store(true, Ordering::Release);
+    }
+
+    pub fn is_cancelled(&self) -> bool {
+        self.0.load(Ordering::Acquire)
+    }
+}
+
 /// The deterministic clock contract injected into every native fallback
 /// rendered document. It:
 /// 1. Pauses CSS/Web animations by pinning `document.timeline.currentTime`.
@@ -54,13 +77,30 @@ pub fn deterministic_clock_script() -> &'static str {
   if (window.OpenTake && window.OpenTake.__installed) return;
   var current = 0;
   var listeners = [];
+  var randomState = 0x6d2b79f5;
+  try { Date.now = function () { return Math.round(current * 1000); }; } catch (e) {}
+  try {
+    Object.defineProperty(performance, 'now', {
+      configurable: true,
+      value: function () { return current * 1000; }
+    });
+  } catch (e) {}
+  try {
+    Math.random = function () {
+      randomState = (randomState + 0x6d2b79f5) | 0;
+      var n = Math.imul(randomState ^ (randomState >>> 15), 1 | randomState);
+      n = (n + Math.imul(n ^ (n >>> 7), 61 | n)) ^ n;
+      return ((n ^ (n >>> 14)) >>> 0) / 4294967296;
+    };
+  } catch (e) {}
   window.OpenTake = {
     __installed: true,
     // Current virtual time in seconds.
     currentTime: function () { return current; },
     // Host calls this once per frame with t = frameIndex / fps.
-    seek: function (seconds) {
+    seek: async function (seconds) {
       current = seconds;
+      randomState = (0x6d2b79f5 ^ Math.round(seconds * 1000000)) | 0;
       try {
         if (document.timeline) {
           // Freeze the document timeline to the virtual clock (ms).
@@ -70,9 +110,11 @@ pub fn deterministic_clock_script() -> &'static str {
           });
         }
       } catch (e) { /* timeline may be read-only; listeners still fire */ }
+      var pending = [];
       for (var i = 0; i < listeners.length; i++) {
-        try { listeners[i](seconds); } catch (e) {}
+        try { pending.push(Promise.resolve(listeners[i](seconds))); } catch (e) {}
       }
+      await Promise.all(pending);
     },
     // Authors register frame callbacks: OpenTake.onSeek(t => { ... }).
     onSeek: function (fn) { if (typeof fn === 'function') listeners.push(fn); }
@@ -272,9 +314,9 @@ impl Crc32 {
     }
 }
 
-/// The real headless-Chromium backend (skeleton).
+/// The real headless-Chromium backend.
 ///
-/// The deterministic fallback flow this skeleton documents, step by step, is:
+/// Its deterministic fallback flow is:
 /// 1. Launch an offscreen Chromium with no network, an empty profile, and no
 ///    filesystem access beyond the served document — applying [`SandboxPolicy`].
 /// 2. `Emulation.setDeviceMetricsOverride` to the requested `width`×`height`.
@@ -290,26 +332,102 @@ impl Crc32 {
 ///    when `transparent`), writing the PNG to `cache_dir/frame_iiiii.png`.
 /// 7. Return the [`RenderedClip`].
 ///
-/// The live CDP wiring is gated behind the `chromium` cargo feature so neither
-/// the default build nor CI needs a browser. Without the feature, [`render`]
+/// The CDP wiring is gated behind the `chromium` cargo feature so the default
+/// build does not require a browser or websocket dependency. The live path
+/// locates Chrome/Chromium/Edge, uses a fresh disposable profile, injects a
+/// strict CSP, intercepts every request with `Fetch`, and kills the browser on
+/// cancellation, timeout, or protocol failure. Without the feature, [`render`]
 /// returns [`MotionError::RendererUnavailable`].
-///
-/// TODO(#34, native fallback): implement the steps above against a CDP
-/// client (e.g. `chromiumoxide`) under `#[cfg(feature = "chromium")]`, including:
-///   - locating/launching the browser binary and surfacing a clear error if absent,
-///   - enforcing the network allowlist via `Fetch.enable` + request interception,
-///   - applying the CSP and timeout fuse,
-///   - mapping CDP failures to `MotionError::RenderFailed` / `::Timeout`.
 #[derive(Clone, Debug)]
 pub struct HeadlessChromiumRenderer {
     cache: MotionCache,
     policy: SandboxPolicy,
+    browser_path: Option<PathBuf>,
+    cancellation: MotionCancellationToken,
 }
 
 impl HeadlessChromiumRenderer {
     /// Build the renderer with a cache and sandbox policy.
     pub fn new(cache: MotionCache, policy: SandboxPolicy) -> Self {
-        HeadlessChromiumRenderer { cache, policy }
+        HeadlessChromiumRenderer {
+            cache,
+            policy,
+            browser_path: None,
+            cancellation: MotionCancellationToken::new(),
+        }
+    }
+
+    /// Override browser discovery. Useful for portable app bundles and for
+    /// deterministic crash-path tests.
+    pub fn with_browser_path(mut self, path: impl Into<PathBuf>) -> Self {
+        self.browser_path = Some(path.into());
+        self
+    }
+
+    /// Attach a cooperative cancellation token.
+    pub fn with_cancellation_token(mut self, token: MotionCancellationToken) -> Self {
+        self.cancellation = token;
+        self
+    }
+
+    /// Locate Chrome, Chromium, or Edge without launching it. An explicit
+    /// `OPENTAKE_CHROMIUM_PATH` wins, followed by platform install locations and
+    /// finally PATH.
+    pub fn find_browser() -> Option<PathBuf> {
+        if let Some(path) = std::env::var_os("OPENTAKE_CHROMIUM_PATH").map(PathBuf::from) {
+            if path.is_file() {
+                return Some(path);
+            }
+        }
+
+        const COMMON: &[&str] = &[
+            "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome",
+            "/Applications/Chromium.app/Contents/MacOS/Chromium",
+            "/Applications/Microsoft Edge.app/Contents/MacOS/Microsoft Edge",
+            "/usr/bin/google-chrome-stable",
+            "/usr/bin/google-chrome",
+            "/usr/bin/chromium",
+            "/usr/bin/chromium-browser",
+            "/usr/bin/microsoft-edge",
+        ];
+        if let Some(path) = COMMON.iter().map(PathBuf::from).find(|path| path.is_file()) {
+            return Some(path);
+        }
+
+        for base in ["PROGRAMFILES", "PROGRAMFILES(X86)", "LOCALAPPDATA"] {
+            let Some(base) = std::env::var_os(base) else {
+                continue;
+            };
+            for relative in [
+                "Google/Chrome/Application/chrome.exe",
+                "Microsoft/Edge/Application/msedge.exe",
+                "Chromium/Application/chrome.exe",
+            ] {
+                let path = PathBuf::from(&base).join(relative);
+                if path.is_file() {
+                    return Some(path);
+                }
+            }
+        }
+
+        let path = std::env::var_os("PATH")?;
+        for dir in std::env::split_paths(&path) {
+            for name in [
+                "google-chrome-stable",
+                "google-chrome",
+                "chromium",
+                "chromium-browser",
+                "microsoft-edge",
+                "chrome.exe",
+                "msedge.exe",
+            ] {
+                let candidate = dir.join(name);
+                if candidate.is_file() {
+                    return Some(candidate);
+                }
+            }
+        }
+        None
     }
 
     /// The sandbox policy in effect.
@@ -355,13 +473,7 @@ impl MotionRenderer for HeadlessChromiumRenderer {
 
         #[cfg(feature = "chromium")]
         {
-            // TODO(#34): real CDP render. Until implemented, fail loudly rather
-            // than silently — a half-done browser path must never masquerade as
-            // a successful render.
-            let _ = (&self.cache, Self::frame_time_grid(req));
-            Err(MotionError::renderer_unavailable(
-                "headless-Chromium backend is enabled but not yet implemented (Issue #34 native fallback TODO)",
-            ))
+            chromium_backend::render(self, req)
         }
         #[cfg(not(feature = "chromium"))]
         {
@@ -374,6 +486,716 @@ impl MotionRenderer for HeadlessChromiumRenderer {
     }
 }
 
+#[cfg(feature = "chromium")]
+mod chromium_backend {
+    use std::io::{BufRead, BufReader};
+    use std::net::TcpStream;
+    use std::process::{Child, Command, Stdio};
+    use std::sync::atomic::{AtomicU64, Ordering};
+    use std::sync::mpsc;
+    use std::thread;
+    use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
+
+    use base64::Engine as _;
+    use serde_json::{json, Value};
+    use tungstenite::stream::MaybeTlsStream;
+    use tungstenite::{Message, WebSocket};
+
+    use super::*;
+
+    static PROFILE_COUNTER: AtomicU64 = AtomicU64::new(0);
+
+    fn trace(message: impl AsRef<str>) {
+        if std::env::var_os("OPENTAKE_MOTION_TRACE").is_some() {
+            eprintln!("[opentake-motion] {}", message.as_ref());
+        }
+    }
+
+    pub(super) fn render(
+        renderer: &HeadlessChromiumRenderer,
+        req: &MotionRenderRequest,
+    ) -> MotionResult<RenderedClip> {
+        if renderer.cancellation.is_cancelled() {
+            return Err(MotionError::Cancelled);
+        }
+
+        let browser_path = renderer
+            .browser_path
+            .clone()
+            .or_else(HeadlessChromiumRenderer::find_browser)
+            .ok_or_else(|| {
+                MotionError::renderer_unavailable(
+                    "no supported Chrome, Chromium, or Edge executable was found; set OPENTAKE_CHROMIUM_PATH",
+                )
+            })?;
+        trace(format!("browser={}", browser_path.display()));
+
+        let document = match &req.source {
+            MotionSource::Code { html_css_js } => sandboxed_document(html_css_js, &renderer.policy),
+            MotionSource::Template { id, .. } => {
+                return Err(MotionError::unknown_template(format!(
+                    "{id} (HeadlessChromiumRenderer requires the caller to resolve templates to inline Code)"
+                )));
+            }
+        };
+
+        let hash = content_hash(req);
+        if renderer.cache.is_cached(req) {
+            return Ok(clip_from_cache(req, hash, renderer.cache.dir_for(req)));
+        }
+
+        let dir = renderer.cache.ensure_dir(req)?;
+        remove_partial_frames(&dir)?;
+        let mut partial = PartialFrames::new(dir.clone());
+        let deadline = Instant::now()
+            .checked_add(renderer.policy.timeout)
+            .unwrap_or_else(Instant::now);
+        check_abort(renderer, deadline)?;
+
+        let (mut browser, websocket_url) = BrowserProcess::launch(
+            &browser_path,
+            deadline,
+            renderer.policy.timeout,
+            &renderer.cancellation,
+        )?;
+        trace("browser launched and CDP endpoint is ready");
+        let (socket, _) = tungstenite::connect(websocket_url.as_str()).map_err(|error| {
+            MotionError::render_failed(format!("failed to connect to Chromium CDP: {error}"))
+        })?;
+        trace("connected to browser CDP");
+        set_socket_poll_timeout(&socket)?;
+        let mut cdp = Cdp::new(
+            socket,
+            renderer.policy.clone(),
+            renderer.cancellation.clone(),
+            deadline,
+        );
+
+        let target = cdp.command(
+            "Target.createTarget",
+            json!({"url": "about:blank", "background": false}),
+            None,
+        )?;
+        let target_id = required_string(&target, "targetId")?;
+        let attached = cdp.command(
+            "Target.attachToTarget",
+            json!({"targetId": target_id, "flatten": true}),
+            None,
+        )?;
+        let session = required_string(&attached, "sessionId")?;
+        trace("created and attached render target");
+
+        cdp.command("Page.enable", json!({}), Some(&session))?;
+        cdp.command("Runtime.enable", json!({}), Some(&session))?;
+        cdp.command("Log.enable", json!({}), Some(&session))?;
+        // A background target can have its compositor throttled on Windows,
+        // leaving a later surface screenshot pending indefinitely.
+        cdp.command("Page.bringToFront", json!({}), Some(&session))?;
+        cdp.command(
+            "Fetch.enable",
+            json!({"patterns": [{"urlPattern": "*", "requestStage": "Request"}]}),
+            Some(&session),
+        )?;
+        cdp.command(
+            "Emulation.setDeviceMetricsOverride",
+            json!({
+                "width": req.width,
+                "height": req.height,
+                "deviceScaleFactor": 1,
+                "mobile": false,
+                "screenWidth": req.width,
+                "screenHeight": req.height
+            }),
+            Some(&session),
+        )?;
+        let alpha = if req.transparent { 0.0 } else { 1.0 };
+        cdp.command(
+            "Emulation.setDefaultBackgroundColorOverride",
+            json!({"color": {"r": 255, "g": 255, "b": 255, "a": alpha}}),
+            Some(&session),
+        )?;
+        cdp.command(
+            "Page.addScriptToEvaluateOnNewDocument",
+            json!({"source": deterministic_clock_script()}),
+            Some(&session),
+        )?;
+
+        let url = HeadlessChromiumRenderer::data_url_for_code(&document);
+        cdp.command("Page.navigate", json!({"url": url}), Some(&session))?;
+        cdp.wait_for_event("Page.loadEventFired", Some(&session))?;
+        trace("inline motion document loaded");
+        // Pausing before navigation also pauses the load lifecycle itself in
+        // recent Chromium. The deterministic clock is already installed before
+        // author code; freeze the browser's own timeline immediately after the
+        // synchronous inline document has loaded and before any frame capture.
+        cdp.command(
+            "Emulation.setVirtualTimePolicy",
+            json!({"policy": "pause"}),
+            Some(&session),
+        )?;
+        if let Some(blocked) = cdp.take_blocked_url() {
+            return Err(MotionError::sandbox(format!(
+                "network access to {blocked:?} is not in the allowlist"
+            )));
+        }
+
+        let mut frames = Vec::with_capacity(req.duration_frames as usize);
+        for (index, seconds) in HeadlessChromiumRenderer::frame_time_grid(req)
+            .into_iter()
+            .enumerate()
+        {
+            check_abort(renderer, deadline)?;
+            trace(format!("frame {index}: seek start at {seconds:.17}s"));
+            let expression = format!(
+                "(async () => {{ if (!window.OpenTake) throw new Error('OpenTake clock missing'); await window.OpenTake.seek({seconds:.17}); return window.OpenTake.currentTime(); }})()"
+            );
+            let evaluated = cdp.command(
+                "Runtime.evaluate",
+                json!({
+                    "expression": expression,
+                    "returnByValue": true,
+                    "awaitPromise": true
+                }),
+                Some(&session),
+            )?;
+            trace(format!("frame {index}: seek complete"));
+            if evaluated
+                .get("exceptionDetails")
+                .and_then(Value::as_object)
+                .is_some()
+            {
+                return Err(MotionError::render_failed(format!(
+                    "author document failed while seeking frame {index}: {evaluated}"
+                )));
+            }
+            if let Some(blocked) = cdp.take_blocked_url() {
+                return Err(MotionError::sandbox(format!(
+                    "network access to {blocked:?} is not in the allowlist"
+                )));
+            }
+
+            let captured = cdp.command(
+                "Page.captureScreenshot",
+                json!({
+                    "format": "png",
+                    "fromSurface": true,
+                    "captureBeyondViewport": false,
+                    "optimizeForSpeed": false
+                }),
+                Some(&session),
+            )?;
+            trace(format!("frame {index}: screenshot captured"));
+            let encoded = required_string(&captured, "data")?;
+            let png = base64::engine::general_purpose::STANDARD
+                .decode(encoded)
+                .map_err(|error| {
+                    MotionError::render_failed(format!(
+                        "Chromium returned malformed screenshot data for frame {index}: {error}"
+                    ))
+                })?;
+            if !png.starts_with(b"\x89PNG\r\n\x1a\n") {
+                return Err(MotionError::render_failed(format!(
+                    "Chromium returned a non-PNG screenshot for frame {index}"
+                )));
+            }
+            let path = MotionCache::frame_file(&dir, index);
+            std::fs::write(&path, png)?;
+            frames.push(path);
+        }
+
+        cdp.command("Target.closeTarget", json!({"targetId": target_id}), None)?;
+        partial.commit();
+        browser.shutdown();
+
+        Ok(RenderedClip {
+            content_hash: hash,
+            frames,
+            fps: req.fps,
+            width: req.width,
+            height: req.height,
+            transparent: req.transparent,
+        })
+    }
+
+    fn clip_from_cache(
+        req: &MotionRenderRequest,
+        content_hash: String,
+        dir: PathBuf,
+    ) -> RenderedClip {
+        RenderedClip {
+            content_hash,
+            frames: (0..req.duration_frames as usize)
+                .map(|index| MotionCache::frame_file(&dir, index))
+                .collect(),
+            fps: req.fps,
+            width: req.width,
+            height: req.height,
+            transparent: req.transparent,
+        }
+    }
+
+    fn sandboxed_document(document: &str, policy: &SandboxPolicy) -> String {
+        let origins = policy
+            .allowed_origins
+            .iter()
+            .map(|origin| origin.as_str())
+            .collect::<Vec<_>>()
+            .join(" ");
+        let sources = if origins.is_empty() {
+            "'none'".to_owned()
+        } else {
+            origins
+        };
+        let csp = format!(
+            "default-src 'none'; script-src 'unsafe-inline' data: {sources}; style-src 'unsafe-inline' data: {sources}; img-src data: {sources}; media-src data: {sources}; font-src data: {sources}; connect-src {sources}; object-src 'none'; base-uri 'none'; form-action 'none'; frame-src 'none'; worker-src 'none'"
+        );
+        format!(
+            "<meta http-equiv=\"Content-Security-Policy\" content=\"{csp}\"><style>html,body{{margin:0;width:100%;height:100%;overflow:hidden;background:transparent}}</style>{document}"
+        )
+    }
+
+    fn check_abort(renderer: &HeadlessChromiumRenderer, deadline: Instant) -> MotionResult<()> {
+        if renderer.cancellation.is_cancelled() {
+            return Err(MotionError::Cancelled);
+        }
+        if Instant::now() >= deadline {
+            return Err(MotionError::Timeout(renderer.policy.timeout));
+        }
+        Ok(())
+    }
+
+    fn required_string(value: &Value, key: &str) -> MotionResult<String> {
+        value
+            .get(key)
+            .and_then(Value::as_str)
+            .map(str::to_owned)
+            .ok_or_else(|| {
+                MotionError::render_failed(format!(
+                    "Chromium CDP response is missing string field {key:?}: {value}"
+                ))
+            })
+    }
+
+    fn remove_partial_frames(dir: &Path) -> MotionResult<()> {
+        for entry in std::fs::read_dir(dir)? {
+            let entry = entry?;
+            let name = entry.file_name();
+            let name = name.to_string_lossy();
+            if name.starts_with("frame_") && name.ends_with(".png") {
+                std::fs::remove_file(entry.path())?;
+            }
+        }
+        Ok(())
+    }
+
+    struct PartialFrames {
+        dir: PathBuf,
+        committed: bool,
+    }
+
+    impl PartialFrames {
+        fn new(dir: PathBuf) -> Self {
+            Self {
+                dir,
+                committed: false,
+            }
+        }
+
+        fn commit(&mut self) {
+            self.committed = true;
+        }
+    }
+
+    impl Drop for PartialFrames {
+        fn drop(&mut self) {
+            if !self.committed {
+                let _ = remove_partial_frames(&self.dir);
+            }
+        }
+    }
+
+    struct BrowserProcess {
+        child: Child,
+        profile: PathBuf,
+    }
+
+    impl BrowserProcess {
+        fn launch(
+            executable: &Path,
+            deadline: Instant,
+            timeout: Duration,
+            cancellation: &MotionCancellationToken,
+        ) -> MotionResult<(Self, String)> {
+            let profile = unique_profile_dir();
+            std::fs::create_dir_all(&profile)?;
+            let mut command = Command::new(executable);
+            command
+                .args([
+                    "--headless=new",
+                    "--remote-debugging-port=0",
+                    "--no-first-run",
+                    "--no-default-browser-check",
+                    "--disable-background-networking",
+                    "--disable-component-update",
+                    "--disable-client-side-phishing-detection",
+                    "--disable-domain-reliability",
+                    "--disable-sync",
+                    "--disable-background-timer-throttling",
+                    "--disable-backgrounding-occluded-windows",
+                    "--disable-renderer-backgrounding",
+                    "--run-all-compositor-stages-before-draw",
+                    "--metrics-recording-only",
+                    "--disable-breakpad",
+                    "--disable-extensions",
+                    "--disable-dev-shm-usage",
+                    "--disable-features=FileSystemAccessAPI,InterestFeedContentSuggestions,OptimizationHints,MediaRouter",
+                    "--password-store=basic",
+                    "--use-mock-keychain",
+                    "about:blank",
+                ])
+                .arg(format!("--user-data-dir={}", profile.display()))
+                .stdin(Stdio::null())
+                .stdout(Stdio::null())
+                .stderr(Stdio::piped());
+            #[cfg(unix)]
+            {
+                use std::os::unix::process::CommandExt;
+                command.process_group(0);
+            }
+            let mut child = command.spawn().map_err(|error| {
+                let _ = std::fs::remove_dir_all(&profile);
+                if error.kind() == std::io::ErrorKind::NotFound {
+                    MotionError::renderer_unavailable(format!(
+                        "Chromium executable does not exist at {}",
+                        executable.display()
+                    ))
+                } else {
+                    MotionError::render_failed(format!(
+                        "failed to launch Chromium at {}: {error}",
+                        executable.display()
+                    ))
+                }
+            })?;
+            let stderr = child
+                .stderr
+                .take()
+                .ok_or_else(|| MotionError::render_failed("Chromium stderr was not captured"))?;
+            let (sender, receiver) = mpsc::channel();
+            thread::spawn(move || {
+                for line in BufReader::new(stderr).lines() {
+                    match line {
+                        Ok(line) => {
+                            if sender.send(line).is_err() {
+                                break;
+                            }
+                        }
+                        Err(_) => break,
+                    }
+                }
+            });
+
+            let mut process = BrowserProcess { child, profile };
+            loop {
+                if cancellation.is_cancelled() {
+                    return Err(MotionError::Cancelled);
+                }
+                if Instant::now() >= deadline {
+                    return Err(MotionError::Timeout(timeout));
+                }
+                if let Some(status) = process.child.try_wait()? {
+                    return Err(MotionError::render_failed(format!(
+                        "Chromium exited before CDP was ready: {status}"
+                    )));
+                }
+                match receiver.recv_timeout(Duration::from_millis(20)) {
+                    Ok(line) => {
+                        if let Some((_, url)) = line.split_once("DevTools listening on ") {
+                            return Ok((process, url.trim().to_owned()));
+                        }
+                    }
+                    Err(mpsc::RecvTimeoutError::Timeout) => {}
+                    Err(mpsc::RecvTimeoutError::Disconnected) => {
+                        return Err(MotionError::render_failed(
+                            "Chromium closed stderr before publishing its CDP endpoint",
+                        ));
+                    }
+                }
+            }
+        }
+
+        fn shutdown(&mut self) {
+            #[cfg(unix)]
+            {
+                // Chrome launches renderer and utility helpers. Terminate the
+                // isolated process group so a wedged author script cannot
+                // outlive the browser root and keep mutating its profile.
+                let process_group = -(self.child.id() as i32);
+                // SAFETY: launch places this child in a process group whose id
+                // is the child's pid; a negative pid targets that group only.
+                unsafe {
+                    libc::kill(process_group, libc::SIGKILL);
+                }
+            }
+            let _ = self.child.kill();
+            let _ = self.child.wait();
+        }
+
+        fn remove_profile(&self) {
+            // Chromium can keep helper processes alive for a few milliseconds
+            // after its root process exits. Those helpers may race a one-shot
+            // remove_dir_all by creating a final state file, leaving profiles
+            // behind on Linux timeout and cancellation paths.
+            const CLEANUP_ATTEMPTS: usize = 100;
+            for attempt in 0..CLEANUP_ATTEMPTS {
+                match std::fs::remove_dir_all(&self.profile) {
+                    Ok(()) => return,
+                    Err(error) if error.kind() == std::io::ErrorKind::NotFound => return,
+                    Err(_) if attempt + 1 < CLEANUP_ATTEMPTS => {
+                        thread::sleep(Duration::from_millis(20));
+                    }
+                    Err(_) => return,
+                }
+            }
+        }
+    }
+
+    impl Drop for BrowserProcess {
+        fn drop(&mut self) {
+            self.shutdown();
+            self.remove_profile();
+        }
+    }
+
+    fn unique_profile_dir() -> PathBuf {
+        let nanos = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap_or_default()
+            .as_nanos();
+        let counter = PROFILE_COUNTER.fetch_add(1, Ordering::Relaxed);
+        std::env::temp_dir().join(format!(
+            "opentake-chromium-{}-{nanos}-{counter}",
+            std::process::id()
+        ))
+    }
+
+    type CdpSocket = WebSocket<MaybeTlsStream<TcpStream>>;
+
+    fn set_socket_poll_timeout(socket: &CdpSocket) -> MotionResult<()> {
+        match socket.get_ref() {
+            MaybeTlsStream::Plain(stream) => stream
+                .set_read_timeout(Some(Duration::from_millis(50)))
+                .map_err(MotionError::Io),
+            _ => Err(MotionError::render_failed(
+                "the local Chromium CDP endpoint unexpectedly used TLS",
+            )),
+        }
+    }
+
+    struct Cdp {
+        socket: CdpSocket,
+        next_id: u64,
+        policy: SandboxPolicy,
+        cancellation: MotionCancellationToken,
+        deadline: Instant,
+        blocked_url: Option<String>,
+        pending_events: Vec<Value>,
+    }
+
+    impl Cdp {
+        fn new(
+            socket: CdpSocket,
+            policy: SandboxPolicy,
+            cancellation: MotionCancellationToken,
+            deadline: Instant,
+        ) -> Self {
+            Self {
+                socket,
+                next_id: 1,
+                policy,
+                cancellation,
+                deadline,
+                blocked_url: None,
+                pending_events: Vec::new(),
+            }
+        }
+
+        fn command(
+            &mut self,
+            method: &str,
+            params: Value,
+            session: Option<&str>,
+        ) -> MotionResult<Value> {
+            let id = self.next_id;
+            self.next_id += 1;
+            let mut message = json!({"id": id, "method": method, "params": params});
+            if let Some(session) = session {
+                message["sessionId"] = Value::String(session.to_owned());
+            }
+            self.send(message)?;
+
+            loop {
+                let value = self.read()?;
+                if value.get("id").and_then(Value::as_u64) == Some(id) {
+                    if let Some(error) = value.get("error") {
+                        return Err(MotionError::render_failed(format!(
+                            "Chromium CDP {method} failed: {error}"
+                        )));
+                    }
+                    return Ok(value.get("result").cloned().unwrap_or_else(|| json!({})));
+                }
+                self.handle_event_or_queue(value)?;
+            }
+        }
+
+        fn wait_for_event(&mut self, method: &str, session: Option<&str>) -> MotionResult<Value> {
+            if let Some(index) = self.pending_events.iter().position(|event| {
+                event.get("method").and_then(Value::as_str) == Some(method)
+                    && session.is_none_or(|expected| {
+                        event.get("sessionId").and_then(Value::as_str) == Some(expected)
+                    })
+            }) {
+                return Ok(self.pending_events.remove(index));
+            }
+            loop {
+                let value = self.read()?;
+                if value.get("method").and_then(Value::as_str) == Some(method)
+                    && session.is_none_or(|expected| {
+                        value.get("sessionId").and_then(Value::as_str) == Some(expected)
+                    })
+                {
+                    return Ok(value);
+                }
+                self.handle_event_or_queue(value)?;
+            }
+        }
+
+        fn take_blocked_url(&mut self) -> Option<String> {
+            self.blocked_url.take()
+        }
+
+        fn send(&mut self, value: Value) -> MotionResult<()> {
+            self.socket
+                .send(Message::text(value.to_string()))
+                .map_err(|error| {
+                    MotionError::render_failed(format!(
+                        "failed to send Chromium CDP command: {error}"
+                    ))
+                })
+        }
+
+        fn read(&mut self) -> MotionResult<Value> {
+            loop {
+                if self.cancellation.is_cancelled() {
+                    return Err(MotionError::Cancelled);
+                }
+                if Instant::now() >= self.deadline {
+                    return Err(MotionError::Timeout(self.policy.timeout));
+                }
+                match self.socket.read() {
+                    Ok(Message::Text(text)) => {
+                        return serde_json::from_str(text.as_ref()).map_err(|error| {
+                            MotionError::render_failed(format!(
+                                "Chromium sent malformed CDP JSON: {error}"
+                            ))
+                        });
+                    }
+                    Ok(Message::Ping(payload)) => {
+                        self.socket.send(Message::Pong(payload)).map_err(|error| {
+                            MotionError::render_failed(format!(
+                                "failed to answer Chromium CDP ping: {error}"
+                            ))
+                        })?;
+                    }
+                    Ok(Message::Close(reason)) => {
+                        return Err(MotionError::render_failed(format!(
+                            "Chromium CDP connection closed unexpectedly: {reason:?}"
+                        )));
+                    }
+                    Ok(_) => {}
+                    Err(tungstenite::Error::Io(error))
+                        if matches!(
+                            error.kind(),
+                            std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut
+                        ) => {}
+                    Err(error) => {
+                        return Err(MotionError::render_failed(format!(
+                            "failed to read Chromium CDP response: {error}"
+                        )));
+                    }
+                }
+            }
+        }
+
+        fn handle_event_or_queue(&mut self, value: Value) -> MotionResult<()> {
+            match value.get("method").and_then(Value::as_str) {
+                Some("Fetch.requestPaused") => self.handle_request(&value),
+                Some("Log.entryAdded") => {
+                    let text = value
+                        .get("params")
+                        .and_then(|params| params.get("entry"))
+                        .and_then(|entry| entry.get("text"))
+                        .and_then(Value::as_str)
+                        .unwrap_or_default();
+                    if (text.contains("Content Security Policy")
+                        || text.contains("Refused to load")
+                        || text.contains("Not allowed to load local resource")
+                        || text.contains("violates the following"))
+                        && self.blocked_url.is_none()
+                    {
+                        self.blocked_url = Some(text.to_owned());
+                    }
+                    Ok(())
+                }
+                Some("Inspector.targetCrashed" | "Target.targetCrashed") => {
+                    Err(MotionError::render_failed("Chromium render target crashed"))
+                }
+                Some(_) => {
+                    if self.pending_events.len() >= 256 {
+                        self.pending_events.remove(0);
+                    }
+                    self.pending_events.push(value);
+                    Ok(())
+                }
+                None => Ok(()),
+            }
+        }
+
+        fn handle_request(&mut self, event: &Value) -> MotionResult<()> {
+            let params = event.get("params").ok_or_else(|| {
+                MotionError::render_failed("Fetch.requestPaused event has no params")
+            })?;
+            let request_id = required_string(params, "requestId")?;
+            let url = params
+                .get("request")
+                .and_then(|request| request.get("url"))
+                .and_then(Value::as_str)
+                .ok_or_else(|| {
+                    MotionError::render_failed("Fetch.requestPaused event has no request URL")
+                })?;
+            let session = event.get("sessionId").and_then(Value::as_str);
+            let allowed = url == "about:blank" || self.policy.check_url(url).is_ok();
+            let id = self.next_id;
+            self.next_id += 1;
+            let (method, params) = if allowed {
+                ("Fetch.continueRequest", json!({"requestId": request_id}))
+            } else {
+                if self.blocked_url.is_none() {
+                    self.blocked_url = Some(url.to_owned());
+                }
+                (
+                    "Fetch.failRequest",
+                    json!({"requestId": request_id, "errorReason": "BlockedByClient"}),
+                )
+            };
+            let mut message = json!({"id": id, "method": method, "params": params});
+            if let Some(session) = session {
+                message["sessionId"] = Value::String(session.to_owned());
+            }
+            self.send(message)
+        }
+    }
+}
+
 /// Percent-encode HTML for a `data:` URL: keep unreserved chars, encode the rest.
 fn percent_encode_html(s: &str) -> String {
     let mut out = String::with_capacity(s.len());
@@ -444,6 +1266,7 @@ mod tests {
         for (fa, fb) in ca.frames.iter().zip(cb.frames.iter()) {
             let ba = std::fs::read(fa).unwrap();
             let bb = std::fs::read(fb).unwrap();
+            assert!(ba.starts_with(b"\x89PNG\r\n\x1a\n"));
             assert_eq!(ba, bb, "same request must produce identical bytes");
         }
     }
@@ -463,6 +1286,20 @@ mod tests {
         assert_eq!(first.get_pixel(0, 0)[3], 0);
         let last = image::open(clip.frames.last().unwrap()).unwrap().to_rgba8();
         assert_eq!(last.get_pixel(0, 0)[3], 255);
+
+        // 200x100 RGBA scanlines exceed one 65,535-byte stored-deflate block.
+        // Decode a direct encoder result to prove multi-block zlib framing and
+        // exact RGBA values, not just the tiny single-block fixture above.
+        let rgba = [17, 34, 51, 68];
+        let big_a = encode_solid_rgba_png(200, 100, rgba);
+        let big_b = encode_solid_rgba_png(200, 100, rgba);
+        assert_eq!(big_a, big_b);
+        let big = image::load_from_memory_with_format(&big_a, image::ImageFormat::Png)
+            .unwrap()
+            .to_rgba8();
+        assert_eq!(big.dimensions(), (200, 100));
+        assert_eq!(big.get_pixel(0, 0).0, rgba);
+        assert_eq!(big.get_pixel(199, 99).0, rgba);
     }
 
     #[test]
@@ -481,17 +1318,43 @@ mod tests {
         let r =
             HeadlessChromiumRenderer::new(MotionCache::new(tmp.path()), SandboxPolicy::default());
         let req = MotionRenderRequest::new(MotionSource::code("<x/>"), 30, 2, 10, 10);
-        let err = r.render(&req).unwrap_err();
-        assert!(
-            matches!(err, MotionError::RendererUnavailable(_)),
-            "expected RendererUnavailable, got {err:?}"
-        );
+        #[cfg(not(feature = "chromium"))]
+        {
+            let err = r.render(&req).unwrap_err();
+            assert!(
+                matches!(err, MotionError::RendererUnavailable(_)),
+                "expected RendererUnavailable, got {err:?}"
+            );
+        }
+        #[cfg(feature = "chromium")]
+        {
+            if HeadlessChromiumRenderer::find_browser().is_some() {
+                let clip = r.render(&req).expect("feature-enabled browser render");
+                assert_eq!(clip.frame_count(), 2);
+            } else {
+                assert!(matches!(
+                    r.render(&req),
+                    Err(MotionError::RendererUnavailable(_))
+                ));
+            }
+        }
     }
 
     #[test]
     fn chromium_applies_sandbox_size_before_unavailable() {
-        // A document over the ceiling fails with a Sandbox error, proving the
-        // policy is enforced even though no browser runs.
+        // Stub checks the default ceiling before creating its content-hash dir.
+        let stub_tmp = tempfile::tempdir().unwrap();
+        let stub = StubRenderer::new(MotionCache::new(stub_tmp.path()));
+        let oversized = "x".repeat(crate::sandbox::DEFAULT_MAX_DOCUMENT_BYTES + 1);
+        let stub_req = MotionRenderRequest::new(MotionSource::code(oversized), 30, 1, 10, 10);
+        assert!(matches!(
+            stub.render(&stub_req),
+            Err(MotionError::Sandbox(_))
+        ));
+        assert_eq!(std::fs::read_dir(stub_tmp.path()).unwrap().count(), 0);
+
+        // Chromium checks its policy before browser discovery/launch and before
+        // creating a content-hash dir, in both feature configurations.
         let tmp = tempfile::tempdir().unwrap();
         let policy = SandboxPolicy {
             max_document_bytes: 4,
@@ -502,6 +1365,7 @@ mod tests {
             MotionRenderRequest::new(MotionSource::code("<this-is-too-long/>"), 30, 1, 10, 10);
         let err = r.render(&req).unwrap_err();
         assert!(matches!(err, MotionError::Sandbox(_)), "got {err:?}");
+        assert_eq!(std::fs::read_dir(tmp.path()).unwrap().count(), 0);
     }
 
     #[test]
diff --git a/crates/opentake-motion/src/sandbox.rs b/crates/opentake-motion/src/sandbox.rs
index 9585b8b2..12c34d39 100644
--- a/crates/opentake-motion/src/sandbox.rs
+++ b/crates/opentake-motion/src/sandbox.rs
@@ -49,12 +49,18 @@ impl AllowedOrigin {
     /// local dev origin) URL — plaintext remote origins are refused outright.
     pub fn parse(origin: &str) -> Option<Self> {
         let lower = origin.trim().trim_end_matches('/').to_ascii_lowercase();
-        let is_https = lower.starts_with("https://");
-        // Allow http only for loopback dev servers; never for remote hosts.
-        let is_local_http = lower.starts_with("http://localhost")
-            || lower.starts_with("http://127.0.0.1")
-            || lower.starts_with("http://[::1]");
-        if (is_https || is_local_http) && lower.len() > "https://".len() {
+        let (scheme, authority) = lower.split_once("://")?;
+        if authority.is_empty()
+            || authority.contains(['/', '?', '#', '@'])
+            || authority.chars().any(char::is_whitespace)
+        {
+            return None;
+        }
+        let is_https = scheme == "https";
+        // Allow http only for exact loopback hosts (with an optional port),
+        // never for lookalikes such as localhost.evil.example.
+        let is_local_http = scheme == "http" && is_loopback_authority(authority);
+        if is_https || is_local_http {
             Some(AllowedOrigin(lower))
         } else {
             None
@@ -64,6 +70,28 @@ impl AllowedOrigin {
     pub fn as_str(&self) -> &str {
         &self.0
     }
+
+    fn matches_url(&self, url: &str) -> bool {
+        let Some(rest) = url.strip_prefix(self.as_str()) else {
+            return false;
+        };
+        rest.is_empty() || rest.starts_with(['/', '?', '#'])
+    }
+}
+
+fn is_loopback_authority(authority: &str) -> bool {
+    for host in ["localhost", "127.0.0.1", "[::1]"] {
+        if authority == host {
+            return true;
+        }
+        if let Some(port) = authority
+            .strip_prefix(host)
+            .and_then(|rest| rest.strip_prefix(':'))
+        {
+            return !port.is_empty() && port.bytes().all(|byte| byte.is_ascii_digit());
+        }
+    }
+    false
 }
 
 /// The sandbox policy applied to a single render.
@@ -128,7 +156,7 @@ impl SandboxPolicy {
         let allowed = self
             .allowed_origins
             .iter()
-            .any(|o| lower.starts_with(o.as_str()));
+            .any(|origin| origin.matches_url(&lower));
         if allowed {
             Ok(())
         } else {
@@ -138,7 +166,9 @@ impl SandboxPolicy {
         }
     }
 
-    /// Reject an inline document larger than the configured ceiling.
+    /// Reject an inline document larger than the configured byte ceiling.
+    /// Equality is accepted; UTF-8 text is charged by encoded bytes, matching
+    /// what is handed to Chromium and what consumes memory.
     pub fn check_document_size(&self, document: &str) -> MotionResult<()> {
         if document.len() > self.max_document_bytes {
             return Err(MotionError::sandbox(format!(
@@ -175,6 +205,9 @@ mod tests {
         assert!(p.check_url("https://unpkg.com/thing").is_err());
         // origin stored without trailing slash, case-insensitive match
         assert!(p.check_url("HTTPS://CDN.JSDELIVR.NET/a").is_ok());
+        assert!(p
+            .check_url("https://cdn.jsdelivr.net.evil.example/a")
+            .is_err());
     }
 
     #[test]
@@ -183,7 +216,9 @@ mod tests {
         assert!(AllowedOrigin::parse("http://cdn.evil.com").is_none());
         // but loopback http is allowed for local dev servers
         assert!(AllowedOrigin::parse("http://localhost:5173").is_some());
+        assert!(AllowedOrigin::parse("http://localhost.evil.example").is_none());
         assert!(AllowedOrigin::parse("https://example.com").is_some());
+        assert!(AllowedOrigin::parse("https://example.com/path").is_none());
         // junk
         assert!(AllowedOrigin::parse("ftp://x").is_none());
         assert!(AllowedOrigin::parse("https://").is_none());
@@ -203,8 +238,15 @@ mod tests {
             max_document_bytes: 10,
             ..Default::default()
         };
-        assert!(p.check_document_size("under10").is_ok());
-        assert!(p.check_document_size("this is way over ten bytes").is_err());
+        assert!(p.check_document_size("0123456789").is_ok());
+        assert!(p.check_document_size("01234567890").is_err());
+
+        let utf8 = SandboxPolicy {
+            max_document_bytes: 3,
+            ..Default::default()
+        };
+        assert!(utf8.check_document_size("é").is_ok()); // 2 UTF-8 bytes
+        assert!(utf8.check_document_size("éé").is_err()); // 4 UTF-8 bytes
     }
 
     #[test]
diff --git a/crates/opentake-motion/tests/chromium.rs b/crates/opentake-motion/tests/chromium.rs
new file mode 100644
index 00000000..f463180f
--- /dev/null
+++ b/crates/opentake-motion/tests/chromium.rs
@@ -0,0 +1,266 @@
+#[cfg(feature = "chromium")]
+mod live {
+    use std::collections::BTreeSet;
+    use std::fs;
+    use std::io::{Read, Write};
+    use std::net::TcpListener;
+    use std::path::PathBuf;
+    use std::sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc,
+    };
+    use std::thread;
+    use std::time::Duration;
+
+    use opentake_motion::{
+        HeadlessChromiumRenderer, MotionCache, MotionCancellationToken, MotionClipSource,
+        MotionError, MotionRenderRequest, MotionRenderer, MotionSource, SandboxPolicy,
+    };
+    use opentake_render::{DecodedFrame, FrameProvider};
+
+    fn browser() -> PathBuf {
+        HeadlessChromiumRenderer::find_browser()
+            .expect("the live chromium test requires Chrome, Chromium, or Edge")
+    }
+
+    fn request(document: &str) -> MotionRenderRequest {
+        MotionRenderRequest::new(MotionSource::code(document), 10, 3, 48, 32)
+    }
+
+    fn renderer(root: &std::path::Path) -> HeadlessChromiumRenderer {
+        HeadlessChromiumRenderer::new(
+            MotionCache::new(root),
+            SandboxPolicy::offline_with_timeout(Duration::from_secs(20)),
+        )
+        .with_browser_path(browser())
+    }
+
+    fn live_profiles() -> BTreeSet<PathBuf> {
+        let prefix = format!("opentake-chromium-{}-", std::process::id());
+        fs::read_dir(std::env::temp_dir())
+            .unwrap()
+            .flatten()
+            .filter_map(|entry| {
+                entry
+                    .file_name()
+                    .to_string_lossy()
+                    .starts_with(&prefix)
+                    .then(|| entry.path())
+            })
+            .collect()
+    }
+
+    fn decoded(path: &std::path::Path) -> Option<DecodedFrame> {
+        let rgba = image::open(path).ok()?.to_rgba8();
+        Some(DecodedFrame::new(
+            rgba.width(),
+            rgba.height(),
+            rgba.into_raw(),
+            false,
+        ))
+    }
+
+    pub(super) fn run() {
+        let profiles_before = live_profiles();
+        let animation = r#"<!doctype html><html><body style="margin:0;background:transparent">
+          <div id="box" style="width:24px;height:16px"></div>
+          <script>
+            OpenTake.onSeek((t) => {
+              const value = Math.round(t * 1000);
+              box.style.background = `rgb(${value}, 20, 30)`;
+              box.dataset.clock = `${Date.now()}:${performance.now()}`;
+            });
+          </script>
+        </body></html>"#;
+
+        let first_root = tempfile::tempdir().unwrap();
+        let second_root = tempfile::tempdir().unwrap();
+        let first = renderer(first_root.path())
+            .render(&request(animation))
+            .unwrap();
+        let second = renderer(second_root.path())
+            .render(&request(animation))
+            .unwrap();
+
+        assert_eq!(first.frame_count(), 3);
+        assert_eq!(second.frame_count(), 3);
+        for (a, b) in first.frames.iter().zip(&second.frames) {
+            assert_eq!(fs::read(a).unwrap(), fs::read(b).unwrap());
+        }
+        assert_ne!(
+            fs::read(&first.frames[0]).unwrap(),
+            fs::read(&first.frames[2]).unwrap(),
+            "virtual time must advance the visible animation"
+        );
+        let first_png = image::open(&first.frames[0]).unwrap().to_rgba8();
+        assert_eq!(first_png.get_pixel(0, 0)[3], 255);
+        assert_eq!(
+            first_png.get_pixel(47, 31)[3],
+            0,
+            "surface capture must preserve the transparent canvas outside content"
+        );
+        let source = MotionClipSource::new(first.clone(), decoded);
+        let composited = source
+            .decoded_frame("motion", 2)
+            .expect("Chromium PNG enters MotionClipSource");
+        assert_eq!((composited.width, composited.height), (48, 32));
+        assert_eq!(composited.rgba.len(), 48 * 32 * 4);
+
+        let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+        listener.set_nonblocking(true).unwrap();
+        let origin = format!("http://{}", listener.local_addr().unwrap());
+        let served = Arc::new(AtomicBool::new(false));
+        let server_observed = Arc::clone(&served);
+        let server = thread::spawn(move || {
+            for _ in 0..250 {
+                match listener.accept() {
+                    Ok((mut stream, _)) => {
+                        let mut request = [0u8; 2048];
+                        let _ = stream.read(&mut request);
+                        let svg = b"<svg xmlns='http://www.w3.org/2000/svg' width='2' height='2'><rect width='2' height='2' fill='red'/></svg>";
+                        let response = format!(
+                            "HTTP/1.1 200 OK\r\nContent-Type: image/svg+xml\r\nContent-Length: {}\r\nConnection: close\r\n\r\n",
+                            svg.len()
+                        );
+                        // Chromium may close the socket as soon as the image is
+                        // decoded and the frame is captured. A late BrokenPipe
+                        // therefore confirms neither a server nor render
+                        // failure; accepting the request is the network-policy
+                        // boundary this fixture needs to prove.
+                        server_observed.store(true, Ordering::Release);
+                        let _ = stream.write_all(response.as_bytes());
+                        let _ = stream.write_all(svg);
+                        return;
+                    }
+                    Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => {
+                        thread::sleep(Duration::from_millis(20));
+                    }
+                    Err(error) => panic!("loopback server failed: {error}"),
+                }
+            }
+        });
+        let allowed_root = tempfile::tempdir().unwrap();
+        let allowed = HeadlessChromiumRenderer::new(
+            MotionCache::new(allowed_root.path()),
+            SandboxPolicy::offline_with_timeout(Duration::from_secs(20)).allow_origin(&origin),
+        )
+        .with_browser_path(browser())
+        .render(&request(&format!("<img src=\"{origin}/pixel.svg\">")))
+        .unwrap();
+        assert_eq!(allowed.frame_count(), 3);
+        server.join().unwrap();
+        assert!(served.load(Ordering::Acquire));
+
+        let blocked_root = tempfile::tempdir().unwrap();
+        let blocked = renderer(blocked_root.path())
+            .render(&request(
+                r#"<img src="https://example.com/disallowed.png">"#,
+            ))
+            .unwrap_err();
+        assert!(matches!(blocked, MotionError::Sandbox(_)), "{blocked:?}");
+        assert!(
+            fs::read_dir(blocked_root.path())
+                .unwrap()
+                .all(|entry| fs::read_dir(entry.unwrap().path())
+                    .unwrap()
+                    .next()
+                    .is_none()),
+            "a rejected render must not leave partial frames"
+        );
+
+        let filesystem_root = tempfile::tempdir().unwrap();
+        let filesystem = renderer(filesystem_root.path())
+            .render(&request(r#"<img src="file:///etc/passwd">"#))
+            .unwrap_err();
+        assert!(
+            matches!(filesystem, MotionError::Sandbox(_)),
+            "{filesystem:?}"
+        );
+
+        let timeout_root = tempfile::tempdir().unwrap();
+        let timeout_renderer = HeadlessChromiumRenderer::new(
+            MotionCache::new(timeout_root.path()),
+            SandboxPolicy::offline_with_timeout(Duration::from_millis(500)),
+        )
+        .with_browser_path(browser());
+        assert!(matches!(
+            timeout_renderer.render(&request("<script>while(true){}</script>")),
+            Err(MotionError::Timeout(_))
+        ));
+
+        let crash_root = tempfile::tempdir().unwrap();
+        let crash_renderer = HeadlessChromiumRenderer::new(
+            MotionCache::new(crash_root.path()),
+            SandboxPolicy::default(),
+        )
+        .with_browser_path(if cfg!(windows) {
+            PathBuf::from(r"C:\Windows\System32\where.exe")
+        } else {
+            PathBuf::from("/usr/bin/false")
+        });
+        let crashed = crash_renderer
+            .render(&request("<div>crash</div>"))
+            .unwrap_err();
+        assert!(
+            matches!(crashed, MotionError::RenderFailed(_)),
+            "{crashed:?}"
+        );
+
+        let malformed_root = tempfile::tempdir().unwrap();
+        assert!(matches!(
+            renderer(malformed_root.path()).render(&request("   ")),
+            Err(MotionError::InvalidSource(_))
+        ));
+
+        let cancellation = MotionCancellationToken::new();
+        let cancelled_root = tempfile::tempdir().unwrap();
+        let cancellation_for_render = cancellation.clone();
+        let cancelled_cache = cancelled_root.path().to_path_buf();
+        let cancelled_browser = browser();
+        let render_thread = thread::spawn(move || {
+            HeadlessChromiumRenderer::new(
+                MotionCache::new(cancelled_cache),
+                SandboxPolicy::offline_with_timeout(Duration::from_secs(20)),
+            )
+            .with_browser_path(cancelled_browser)
+            .with_cancellation_token(cancellation_for_render)
+            .render(&request("<script>while(true){}</script>"))
+        });
+        thread::sleep(Duration::from_millis(200));
+        cancellation.cancel();
+        assert!(matches!(
+            render_thread.join().unwrap(),
+            Err(MotionError::Cancelled)
+        ));
+
+        assert_eq!(
+            live_profiles(),
+            profiles_before,
+            "success, policy failure, timeout, crash, and cancellation must clean browser profiles"
+        );
+    }
+}
+
+#[cfg(feature = "chromium")]
+#[test]
+fn virtual_time_network_csp_timeout_cleanup_and_frame_identity() {
+    live::run();
+}
+
+#[cfg(not(feature = "chromium"))]
+#[test]
+fn virtual_time_network_csp_timeout_cleanup_and_frame_identity() {
+    use opentake_motion::{
+        HeadlessChromiumRenderer, MotionCache, MotionError, MotionRenderRequest, MotionRenderer,
+        MotionSource, SandboxPolicy,
+    };
+
+    let root = tempfile::tempdir().unwrap();
+    let renderer =
+        HeadlessChromiumRenderer::new(MotionCache::new(root.path()), SandboxPolicy::default());
+    let request = MotionRenderRequest::new(MotionSource::code("<div/>"), 30, 1, 16, 16);
+    assert!(matches!(
+        renderer.render(&request),
+        Err(MotionError::RendererUnavailable(_))
+    ));
+}
diff --git a/crates/opentake-ops/src/command.rs b/crates/opentake-ops/src/command.rs
index 57586f08..7edf8958 100644
--- a/crates/opentake-ops/src/command.rs
+++ b/crates/opentake-ops/src/command.rs
@@ -16,10 +16,14 @@
 //! Ripple refusals (a sync-locked follower can't absorb the shift) abort like a
 //! validation error: `Err(EditError::Refused)`, document untouched.
 
-use std::collections::HashSet;
+use std::collections::{HashMap, HashSet};
 
 use opentake_domain::{
-    ChromaKey, ClipType, ColorGrade, Crop, Effect, Interpolation, Mask, Timeline, Transform,
+    AudioDenoise, CaptionTranslationInput, ChromaKey, Clip, ClipType, ColorGrade, ColorMatchInput,
+    Crop, Effect, Interpolation, LoudnessNormalization, LutReference, Mask, MaskShape,
+    MediaManifestEntry, NestedSequence, ScriptAssemblyPlan, StabilizationTrack, Timeline, Track,
+    Transform, Transition, TransitionKind, VoiceModelRecord, MAX_MASKS_PER_CLIP,
+    MAX_POLYGON_MASK_POINTS,
 };
 
 use crate::editor_state::EditorState;
@@ -40,6 +44,462 @@ pub enum EditError {
     Refused(String),
 }
 
+#[cfg(test)]
+mod motion_media_transaction_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+    use opentake_domain::{MediaSource, Track};
+
+    fn media(id: &str) -> MediaManifestEntry {
+        MediaManifestEntry {
+            id: id.into(),
+            name: format!("{id}.mp4"),
+            kind: ClipType::Video,
+            source: MediaSource::Project {
+                relative_path: format!("media/{id}.mp4"),
+            },
+            duration: 1.0,
+            generation_input: None,
+            source_width: Some(64),
+            source_height: Some(36),
+            source_fps: Some(30.0),
+            has_audio: Some(false),
+            color: None,
+            proxy: None,
+            folder_id: None,
+            cached_remote_url: None,
+            cached_remote_url_expires_at: None,
+        }
+    }
+
+    fn clip(media_ref: &str, track_index: usize) -> ClipEntry {
+        ClipEntry {
+            media_ref: media_ref.into(),
+            media_type: ClipType::Video,
+            source_clip_type: ClipType::Video,
+            track_index,
+            start_frame: 0,
+            duration_frames: 30,
+            trim_start_frame: None,
+            trim_end_frame: None,
+            has_audio: false,
+            add_linked_audio: false,
+            transform: None,
+        }
+    }
+
+    #[test]
+    fn register_and_add_is_one_undoable_document_transaction() {
+        let mut state = EditorState::default();
+        let ids = SeqIdGen::default();
+        let result = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndAddClip {
+                media: media("motion-a"),
+                entry: clip("motion-a", 0),
+                auto_track: true,
+            },
+            &ids,
+        )
+        .unwrap();
+
+        assert_eq!(result.action_name, "Add Motion Graphic");
+        assert_eq!(state.manifest.entries.len(), 1);
+        assert_eq!(state.timeline.tracks.len(), 1);
+        assert_eq!(state.timeline.tracks[0].clips.len(), 1);
+        assert_eq!(state.undo_depth(), 1);
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert!(state.manifest.entries.is_empty());
+        assert!(state.timeline.tracks.is_empty());
+    }
+
+    #[test]
+    fn failed_register_and_place_leaves_manifest_timeline_and_history_unchanged() {
+        let mut state = EditorState::default();
+        state
+            .timeline
+            .tracks
+            .push(Track::new("audio", ClipType::Audio));
+        let before = state.clone();
+        let error = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndAddClip {
+                media: media("motion-a"),
+                entry: clip("motion-a", 0),
+                auto_track: false,
+            },
+            &SeqIdGen::default(),
+        )
+        .unwrap_err();
+
+        assert!(error.to_string().contains("not compatible"));
+        assert_eq!(state.timeline, before.timeline);
+        assert_eq!(state.manifest, before.manifest);
+        assert_eq!(state.undo_depth(), before.undo_depth());
+        assert_eq!(state.version(), before.version());
+    }
+
+    #[test]
+    fn register_and_swap_preserves_clip_identity_and_undo_restores_old_asset() {
+        let mut state = EditorState::default();
+        let ids = SeqIdGen::default();
+        let added = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndAddClip {
+                media: media("motion-a"),
+                entry: clip("motion-a", 0),
+                auto_track: true,
+            },
+            &ids,
+        )
+        .unwrap();
+        let clip_id = added.affected_clip_ids[0].clone();
+
+        let edited = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndSwapClip {
+                media: media("motion-b"),
+                clip_id: clip_id.clone(),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(edited.action_name, "Edit Motion Graphic");
+        assert_eq!(edited.affected_clip_ids, vec![clip_id.clone()]);
+        assert_eq!(state.manifest.entries.len(), 2);
+        assert_eq!(state.timeline.tracks[0].clips[0].id, clip_id);
+        assert_eq!(state.timeline.tracks[0].clips[0].media_ref, "motion-b");
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert_eq!(state.manifest.entries.len(), 1);
+        assert_eq!(state.timeline.tracks[0].clips[0].media_ref, "motion-a");
+    }
+
+    #[test]
+    fn register_swap_and_clear_masks_is_one_reversible_transaction() {
+        let mut state = EditorState::default();
+        let ids = SeqIdGen::default();
+        let added = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndAddClip {
+                media: media("source-a"),
+                entry: clip("source-a", 0),
+                auto_track: true,
+            },
+            &ids,
+        )
+        .unwrap();
+        let clip_id = added.affected_clip_ids[0].clone();
+        state.timeline.tracks[0].clips[0].masks = vec![Mask::default()];
+        let undo_depth_before = state.undo_depth();
+
+        let edited = apply(
+            &mut state,
+            EditCommand::RegisterMediaAndSwapClipClearingMasks {
+                media: media("object-removed-b"),
+                clip_id: clip_id.clone(),
+            },
+            &ids,
+        )
+        .unwrap();
+
+        assert_eq!(edited.action_name, "Remove Masked Object");
+        assert_eq!(edited.affected_clip_ids, vec![clip_id]);
+        assert_eq!(state.undo_depth(), undo_depth_before + 1);
+        assert_eq!(state.manifest.entries.len(), 2);
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].media_ref,
+            "object-removed-b"
+        );
+        assert!(state.timeline.tracks[0].clips[0].masks.is_empty());
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert_eq!(state.manifest.entries.len(), 1);
+        assert_eq!(state.timeline.tracks[0].clips[0].media_ref, "source-a");
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].masks,
+            vec![Mask::default()]
+        );
+
+        apply(&mut state, EditCommand::Redo, &ids).unwrap();
+        assert_eq!(state.manifest.entries.len(), 2);
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].media_ref,
+            "object-removed-b"
+        );
+        assert!(state.timeline.tracks[0].clips[0].masks.is_empty());
+    }
+}
+
+#[cfg(test)]
+mod color_match_command_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+    use opentake_domain::Rgb;
+
+    fn input() -> ColorMatchInput {
+        ColorMatchInput {
+            reference_media_ref: "reference".into(),
+            reference_frame: 3,
+            target_frame: 12,
+            algorithm: "fixture-match".into(),
+            algorithm_version: 1,
+            target_mean_linear: Rgb::new(0.3, 0.2, 0.1),
+            reference_mean_linear: Rgb::new(0.1, 0.2, 0.3),
+            delta_e_before: 20.0,
+            delta_e_after: 1.0,
+            target_luma_before: 0.2,
+            target_luma_after: 0.2,
+        }
+    }
+
+    #[test]
+    fn apply_color_match_is_one_undoable_edit_and_manual_grade_clears_provenance() {
+        let mut state = EditorState::default();
+        let ids = SeqIdGen::default();
+        apply(
+            &mut state,
+            EditCommand::InsertTrack {
+                kind: ClipType::Video,
+                at: None,
+            },
+            &ids,
+        )
+        .unwrap();
+        let clip_id = ids.next_id();
+        state.timeline.tracks[0]
+            .clips
+            .push(Clip::new(clip_id.clone(), "target", 10, 20));
+        let grade = ColorGrade {
+            temperature: 0.2,
+            ..ColorGrade::default()
+        };
+        let undo_before = state.undo_depth();
+
+        let result = apply(
+            &mut state,
+            EditCommand::ApplyColorMatch {
+                clip_id: clip_id.clone(),
+                grade,
+                input: input(),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(result.action_name, "Match Color");
+        assert_eq!(state.undo_depth(), undo_before + 1);
+        assert_eq!(state.timeline.tracks[0].clips[0].color_grade, Some(grade));
+        assert_eq!(
+            state.timeline.tracks[0].clips[0]
+                .color_match_input
+                .as_ref()
+                .unwrap()
+                .reference_media_ref,
+            "reference"
+        );
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert!(state.timeline.tracks[0].clips[0].color_grade.is_none());
+        assert!(state.timeline.tracks[0].clips[0]
+            .color_match_input
+            .is_none());
+        apply(&mut state, EditCommand::Redo, &ids).unwrap();
+        apply(
+            &mut state,
+            EditCommand::SetColorGrade {
+                clip_ids: vec![clip_id],
+                grade: Some(ColorGrade::default()),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert!(state.timeline.tracks[0].clips[0]
+            .color_match_input
+            .is_none());
+    }
+}
+
+#[cfg(test)]
+mod aligned_stem_track_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+
+    fn stem(media_ref: &str) -> ClipEntry {
+        ClipEntry {
+            media_ref: media_ref.into(),
+            media_type: ClipType::Audio,
+            source_clip_type: ClipType::Audio,
+            track_index: 0,
+            start_frame: 40,
+            duration_frames: 100,
+            trim_start_frame: None,
+            trim_end_frame: None,
+            has_audio: true,
+            add_linked_audio: false,
+            transform: None,
+        }
+    }
+
+    #[test]
+    fn aligned_stems_use_separate_tracks_and_one_undo_entry() {
+        let mut state = EditorState::default();
+        let ids = SeqIdGen::default();
+        let result = apply(
+            &mut state,
+            EditCommand::AddClipsToSeparateAutoTracks {
+                entries: vec![stem("vocals"), stem("accompaniment")],
+            },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(result.action_name, "Import Stems To Tracks");
+        assert_eq!(result.affected_clip_ids.len(), 2);
+        assert_eq!(state.timeline.tracks.len(), 2);
+        assert!(state.timeline.tracks.iter().all(|track| {
+            track.kind == ClipType::Audio
+                && track.clips.len() == 1
+                && track.clips[0].start_frame == 40
+                && track.clips[0].duration_frames == 100
+        }));
+        assert_eq!(state.undo_depth(), 1);
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert!(state.timeline.tracks.is_empty());
+    }
+}
+
+#[cfg(test)]
+mod loudness_command_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+
+    fn normalization() -> LoudnessNormalization {
+        LoudnessNormalization {
+            target_lufs: -16.0,
+            true_peak_ceiling_dbtp: -1.0,
+            input_integrated_lufs: -23.0,
+            input_true_peak_dbtp: -8.0,
+            gain_db: 7.0,
+            output_integrated_lufs: -16.0,
+            output_true_peak_dbtp: -1.0,
+        }
+    }
+
+    #[test]
+    fn loudness_apply_reset_and_undo_are_one_step_operations() {
+        let mut timeline = Timeline::new();
+        let mut track = Track::new("a1", ClipType::Audio);
+        let mut clip = Clip::new("audio", "asset", 0, 90);
+        clip.media_type = ClipType::Audio;
+        clip.source_clip_type = ClipType::Audio;
+        track.clips.push(clip);
+        timeline.tracks.push(track);
+        let mut state = EditorState::from_timeline(timeline);
+        let ids = SeqIdGen::default();
+
+        apply(
+            &mut state,
+            EditCommand::SetLoudnessNormalization {
+                clip_id: "audio".to_string(),
+                normalization: Some(normalization()),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].loudness_normalization,
+            Some(normalization())
+        );
+        assert_eq!(state.undo_depth(), 1);
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert!(state.timeline.tracks[0].clips[0]
+            .loudness_normalization
+            .is_none());
+        apply(&mut state, EditCommand::Redo, &ids).unwrap();
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].loudness_normalization,
+            Some(normalization())
+        );
+
+        apply(
+            &mut state,
+            EditCommand::SetLoudnessNormalization {
+                clip_id: "audio".to_string(),
+                normalization: None,
+            },
+            &ids,
+        )
+        .unwrap();
+        assert!(state.timeline.tracks[0].clips[0]
+            .loudness_normalization
+            .is_none());
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].loudness_normalization,
+            Some(normalization())
+        );
+    }
+}
+
+#[cfg(test)]
+mod denoise_command_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+    use opentake_domain::DenoiseMode;
+
+    #[test]
+    fn denoise_apply_reset_and_undo_are_one_step_operations() {
+        let mut timeline = Timeline::new();
+        let mut track = Track::new("a1", ClipType::Audio);
+        let mut clip = Clip::new("audio", "asset", 0, 90);
+        clip.media_type = ClipType::Audio;
+        clip.source_clip_type = ClipType::Audio;
+        track.clips.push(clip);
+        timeline.tracks.push(track);
+        let mut state = EditorState::from_timeline(timeline);
+        let config = AudioDenoise {
+            mode: DenoiseMode::Voice,
+            strength: 0.8,
+            preview_enabled: true,
+        };
+
+        apply(
+            &mut state,
+            EditCommand::SetAudioDenoise {
+                clip_id: "audio".to_string(),
+                denoise: Some(config),
+            },
+            &SeqIdGen::default(),
+        )
+        .unwrap();
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].audio_denoise,
+            Some(config)
+        );
+        assert_eq!(state.undo_depth(), 1);
+        apply(&mut state, EditCommand::Undo, &SeqIdGen::default()).unwrap();
+        assert!(state.timeline.tracks[0].clips[0].audio_denoise.is_none());
+        apply(&mut state, EditCommand::Redo, &SeqIdGen::default()).unwrap();
+        assert_eq!(
+            state.timeline.tracks[0].clips[0].audio_denoise,
+            Some(config)
+        );
+
+        apply(
+            &mut state,
+            EditCommand::SetAudioDenoise {
+                clip_id: "audio".to_string(),
+                denoise: None,
+            },
+            &SeqIdGen::default(),
+        )
+        .unwrap();
+        assert!(state.timeline.tracks[0].clips[0].audio_denoise.is_none());
+    }
+}
+
 impl std::fmt::Display for EditError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
@@ -154,6 +614,16 @@ pub struct CaptionEntry {
     pub caption_group_id: String,
 }
 
+/// One reviewed caption text replacement. A batch is validated completely
+/// before mutation, preserving clip identity and timing as one undo step.
+#[derive(Clone, Debug)]
+pub struct CaptionTranslationChange {
+    pub clip_id: String,
+    pub expected_source_text: String,
+    pub translated_text: String,
+    pub input: CaptionTranslationInput,
+}
+
 /// A single clip property assignment for [`EditCommand::SetClipProperties`].
 /// `None` fields are left unchanged; setting a scalar clears the matching
 /// keyframe track (mirrors `applyPropertyChanges`).
@@ -223,12 +693,66 @@ pub enum KeyframeValue {
 /// The unified editing command. Every editing surface routes through this.
 #[derive(Clone, Debug)]
 pub enum EditCommand {
+    /// Register an editable child timeline and place one compound clip that
+    /// references it. Sequence + clip creation is one undoable transaction.
+    CreateNestedSequence {
+        name: String,
+        timeline: Timeline,
+        track_index: usize,
+        start_frame: i32,
+        duration_frames: i32,
+    },
+    /// Turn selected root clips into one editable compound clip. The child
+    /// timeline keeps their relative tracks/timing and source edits.
+    CreateNestedSequenceFromClips { name: String, clip_ids: Vec<String> },
+    /// Apply any ordinary edit command to a child timeline while preserving one
+    /// root-level undo snapshot and the shared media manifest.
+    EditNestedSequence {
+        sequence_id: String,
+        command: Box<EditCommand>,
+    },
+    /// Replace the editable contents of one existing nested sequence.
+    SetNestedSequenceTimeline {
+        sequence_id: String,
+        timeline: Timeline,
+    },
+    /// Rename a nested sequence without changing references.
+    RenameNestedSequence { sequence_id: String, name: String },
+    /// Replace one compound clip with clipped copies of its child timeline
+    /// tracks, preserving media edits and keeping the operation undoable.
+    DissolveNestedSequence { clip_id: String },
     /// Overwrite-place clips (clears each destination range first).
     AddClips { entries: Vec<ClipEntry> },
     /// Overwrite-place clips on fresh shared tracks chosen by media type.
     /// Visual entries share one new visual track; audio entries share one new
     /// audio track. Track insertion and placement commit as one transaction.
     AddClipsAutoTrack { entries: Vec<ClipEntry> },
+    /// Place each entry on its own fresh compatible track in one transaction.
+    /// Used for aligned stems that intentionally overlap in time.
+    AddClipsToSeparateAutoTracks { entries: Vec<ClipEntry> },
+    /// Register one already validated project-managed video and place it in the
+    /// same undo snapshot. Used by deterministic external renderers so undo
+    /// removes both the generated clip and its manifest record.
+    RegisterMediaAndAddClip {
+        media: MediaManifestEntry,
+        entry: ClipEntry,
+        auto_track: bool,
+    },
+    /// Register a newly rendered replacement and swap an existing clip to it in
+    /// one undo snapshot. Undo restores the old media ref and removes the new
+    /// manifest record while leaving the prior rendered asset available.
+    RegisterMediaAndSwapClip {
+        media: MediaManifestEntry,
+        clip_id: String,
+    },
+    /// Register a rendered replacement, swap an existing clip to it, and
+    /// remove the editable masks that were baked into that derivative. The
+    /// three mutations share one undo snapshot so undo restores both the
+    /// source media and its masks.
+    RegisterMediaAndSwapClipClearingMasks {
+        media: MediaManifestEntry,
+        clip_id: String,
+    },
     /// Ripple-insert clips at `at_frame`, pushing later clips right.
     InsertClips {
         track_index: usize,
@@ -322,6 +846,17 @@ pub enum EditCommand {
         clip_ids: Vec<String>,
         grade: Option<ColorGrade>,
     },
+    /// Apply a sampled reference match and its persisted provenance together.
+    ApplyColorMatch {
+        clip_id: String,
+        grade: ColorGrade,
+        input: ColorMatchInput,
+    },
+    /// Set or clear one project-managed 3D LUT on one or more clips.
+    SetLut {
+        clip_ids: Vec<String>,
+        lut: Option<LutReference>,
+    },
     /// Set (or clear with `None`) the chroma key on one or more clips.
     SetChromaKey {
         clip_ids: Vec<String>,
@@ -337,6 +872,36 @@ pub enum EditCommand {
         clip_ids: Vec<String>,
         effects: Vec<Effect>,
     },
+    /// Apply or reset one source analysis as an undoable audio operation.
+    SetLoudnessNormalization {
+        clip_id: String,
+        normalization: Option<LoudnessNormalization>,
+    },
+    /// Apply or reset local non-destructive denoise parameters.
+    SetAudioDenoise {
+        clip_id: String,
+        denoise: Option<AudioDenoise>,
+    },
+    /// Persist a source-bound, editable stabilization analysis on one video clip.
+    ApplyStabilization {
+        clip_id: String,
+        solution: StabilizationTrack,
+    },
+    /// Change user-facing stabilization strength and/or safety crop margin.
+    AdjustStabilization {
+        clip_id: String,
+        strength: Option<f64>,
+        crop_margin: Option<f64>,
+    },
+    /// Remove stabilization while preserving authored transforms and source media.
+    ResetStabilization { clip_id: String },
+    /// Set or clear the visual transition at one exact adjacent clip boundary.
+    SetTransition {
+        from_clip_id: String,
+        to_clip_id: String,
+        kind: Option<TransitionKind>,
+        duration_frames: i32,
+    },
     /// Ripple-delete project-frame ranges on a track, closing the gaps.
     RippleDeleteRanges {
         track_index: usize,
@@ -371,6 +936,20 @@ pub enum EditCommand {
     /// composing `InsertTrack` + `AddTexts` would be two undo steps and could not
     /// stamp `caption_group_id`. Empty `entries` is a no-op (no track, no change).
     AddCaptions { entries: Vec<CaptionEntry> },
+    /// Accept a reviewed batch of translated captions without changing IDs,
+    /// track placement, or frame ranges.
+    ApplyCaptionTranslations {
+        changes: Vec<CaptionTranslationChange>,
+    },
+    /// Persist a reviewable script assembly plan without placing any clips.
+    SaveScriptAssemblyPlan { plan: ScriptAssemblyPlan },
+    /// Apply one already persisted plan to fresh visual/narration tracks as a
+    /// single timeline transaction.
+    ApplyScriptAssemblyPlan { plan_id: String },
+    /// Persist one consent-bearing provider voice identity.
+    SaveVoiceModel { record: VoiceModelRecord },
+    /// Permanently mark a provider voice as revoked in project metadata.
+    RevokeVoiceModel { voice_model_id: String },
     /// Link clips into one group.
     Link { clip_ids: Vec<String> },
     /// Unlink clips (and their whole groups).
@@ -497,13 +1076,59 @@ pub fn apply(
             ))
         }
 
-        EditCommand::AddClips { entries } => add_clips(state, entries, ids),
-        EditCommand::AddClipsAutoTrack { entries } => add_clips_auto_track(state, entries, ids),
-        EditCommand::InsertClips {
+        EditCommand::CreateNestedSequence {
+            name,
+            timeline,
             track_index,
-            at_frame,
-            entries,
-        } => insert_clips(state, track_index, at_frame, entries, ids),
+            start_frame,
+            duration_frames,
+        } => create_nested_sequence(
+            state,
+            name,
+            timeline,
+            track_index,
+            start_frame,
+            duration_frames,
+            ids,
+        ),
+        EditCommand::CreateNestedSequenceFromClips { name, clip_ids } => {
+            create_nested_sequence_from_clips(state, name, clip_ids, ids)
+        }
+        EditCommand::EditNestedSequence {
+            sequence_id,
+            command,
+        } => edit_nested_sequence(state, sequence_id, *command, ids),
+        EditCommand::SetNestedSequenceTimeline {
+            sequence_id,
+            timeline,
+        } => set_nested_sequence_timeline(state, sequence_id, timeline),
+        EditCommand::RenameNestedSequence { sequence_id, name } => {
+            rename_nested_sequence(state, sequence_id, name)
+        }
+        EditCommand::DissolveNestedSequence { clip_id } => {
+            dissolve_nested_sequence(state, clip_id, ids)
+        }
+        EditCommand::AddClips { entries } => add_clips(state, entries, ids),
+        EditCommand::AddClipsAutoTrack { entries } => add_clips_auto_track(state, entries, ids),
+        EditCommand::AddClipsToSeparateAutoTracks { entries } => {
+            add_clips_to_separate_auto_tracks(state, entries, ids)
+        }
+        EditCommand::RegisterMediaAndAddClip {
+            media,
+            entry,
+            auto_track,
+        } => register_media_and_add_clip(state, media, entry, auto_track, ids),
+        EditCommand::RegisterMediaAndSwapClip { media, clip_id } => {
+            register_media_and_swap_clip(state, media, clip_id, false, ids)
+        }
+        EditCommand::RegisterMediaAndSwapClipClearingMasks { media, clip_id } => {
+            register_media_and_swap_clip(state, media, clip_id, true, ids)
+        }
+        EditCommand::InsertClips {
+            track_index,
+            at_frame,
+            entries,
+        } => insert_clips(state, track_index, at_frame, entries, ids),
         EditCommand::MoveClips { moves } => move_clips(state, moves, ids),
         EditCommand::DuplicateClips {
             clip_ids,
@@ -557,12 +1182,40 @@ pub fn apply(
             interpolation,
         } => set_keyframe_interpolation(state, clip_id, property, frame, interpolation),
         EditCommand::SetColorGrade { clip_ids, grade } => set_color_grade(state, clip_ids, grade),
+        EditCommand::ApplyColorMatch {
+            clip_id,
+            grade,
+            input,
+        } => apply_color_match(state, clip_id, grade, input),
+        EditCommand::SetLut { clip_ids, lut } => set_lut(state, clip_ids, lut),
         EditCommand::SetChromaKey {
             clip_ids,
             chroma_key,
         } => set_chroma_key(state, clip_ids, chroma_key),
         EditCommand::SetMasks { clip_ids, masks } => set_masks(state, clip_ids, masks),
         EditCommand::SetEffects { clip_ids, effects } => set_effects(state, clip_ids, effects),
+        EditCommand::SetLoudnessNormalization {
+            clip_id,
+            normalization,
+        } => set_loudness_normalization(state, clip_id, normalization),
+        EditCommand::SetAudioDenoise { clip_id, denoise } => {
+            set_audio_denoise(state, clip_id, denoise)
+        }
+        EditCommand::ApplyStabilization { clip_id, solution } => {
+            apply_stabilization(state, clip_id, solution)
+        }
+        EditCommand::AdjustStabilization {
+            clip_id,
+            strength,
+            crop_margin,
+        } => adjust_stabilization(state, clip_id, strength, crop_margin),
+        EditCommand::ResetStabilization { clip_id } => reset_stabilization(state, clip_id),
+        EditCommand::SetTransition {
+            from_clip_id,
+            to_clip_id,
+            kind,
+            duration_frames,
+        } => set_transition(state, from_clip_id, to_clip_id, kind, duration_frames),
         EditCommand::RippleDeleteRanges {
             track_index,
             ranges,
@@ -571,6 +1224,17 @@ pub fn apply(
         EditCommand::AddTexts { entries } => add_texts(state, entries, ids),
         EditCommand::AddTextsAutoTrack { entries } => add_texts_auto_track(state, entries, ids),
         EditCommand::AddCaptions { entries } => add_captions(state, entries, ids),
+        EditCommand::ApplyCaptionTranslations { changes } => {
+            apply_caption_translations(state, changes)
+        }
+        EditCommand::SaveScriptAssemblyPlan { plan } => save_script_assembly_plan(state, plan),
+        EditCommand::ApplyScriptAssemblyPlan { plan_id } => {
+            apply_script_assembly_plan(state, plan_id, ids)
+        }
+        EditCommand::SaveVoiceModel { record } => save_voice_model(state, record),
+        EditCommand::RevokeVoiceModel { voice_model_id } => {
+            revoke_voice_model(state, voice_model_id)
+        }
         EditCommand::Link { clip_ids } => link(state, clip_ids, ids),
         EditCommand::Unlink { clip_ids } => unlink(state, clip_ids),
         EditCommand::RemoveTracks { track_indexes } => remove_tracks(state, track_indexes),
@@ -603,6 +1267,470 @@ pub fn apply(
     }
 }
 
+fn create_nested_sequence(
+    state: &mut EditorState,
+    name: String,
+    timeline: Timeline,
+    track_index: usize,
+    start_frame: i32,
+    duration_frames: i32,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    let name = name.trim().to_string();
+    if name.is_empty() {
+        return Err(EditError::Invalid(
+            "nested sequence name must not be empty".into(),
+        ));
+    }
+    if track_index >= state.timeline.tracks.len() {
+        return Err(EditError::Invalid(format!(
+            "track index out of range: {track_index}"
+        )));
+    }
+    if state.timeline.tracks[track_index].kind == ClipType::Audio {
+        return Err(EditError::Invalid(
+            "a compound clip requires a visual track".into(),
+        ));
+    }
+    if start_frame < 0 || duration_frames < 1 {
+        return Err(EditError::Invalid(
+            "compound timing requires startFrame >= 0 and durationFrames >= 1".into(),
+        ));
+    }
+    if !timeline.nested_sequences.is_empty() {
+        return Err(EditError::Invalid(
+            "child timelines must reference the root nested sequence registry".into(),
+        ));
+    }
+
+    transact(
+        state,
+        "Create Compound Clip",
+        |affected| format!("Created compound clip {}", affected.join(", ")),
+        |st| {
+            let sequence_id = ids.next_id();
+            let clip_id = ids.next_id();
+            st.timeline.nested_sequences.push(NestedSequence::new(
+                sequence_id.clone(),
+                name,
+                timeline,
+            ));
+            ops::clear_region(
+                &mut st.timeline,
+                track_index,
+                start_frame,
+                start_frame.saturating_add(duration_frames),
+                false,
+                ids,
+            );
+            st.timeline.tracks[track_index].clips.push(Clip::new_nested(
+                clip_id.clone(),
+                sequence_id,
+                start_frame,
+                duration_frames,
+            ));
+            ops::sort_clips(&mut st.timeline.tracks[track_index]);
+            Ok(vec![clip_id])
+        },
+    )
+}
+
+fn create_nested_sequence_from_clips(
+    state: &mut EditorState,
+    name: String,
+    clip_ids: Vec<String>,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    let name = name.trim().to_string();
+    if name.is_empty() {
+        return Err(EditError::Invalid(
+            "nested sequence name must not be empty".into(),
+        ));
+    }
+    if clip_ids.is_empty() {
+        return Err(EditError::Invalid(
+            "at least one clip is required to create a compound".into(),
+        ));
+    }
+    let requested: HashSet<String> = clip_ids.iter().cloned().collect();
+    if requested.len() != clip_ids.len() {
+        return Err(EditError::Invalid(
+            "compound clip selection contains duplicate ids".into(),
+        ));
+    }
+    // Keep linked A/V partners inside the same edit boundary. Leaving one half
+    // at root would create a link group spanning independent timelines, which
+    // child edit commands cannot preserve safely.
+    let selected = ops::expand_to_link_group(&state.timeline, &requested);
+
+    let mut start_frame = i32::MAX;
+    let mut end_frame = i32::MIN;
+    let mut target_track = None;
+    let mut child = Timeline::new();
+    child.fps = state.timeline.fps;
+    child.width = state.timeline.width;
+    child.height = state.timeline.height;
+    child.settings_configured = state.timeline.settings_configured;
+    for (track_index, track) in state.timeline.tracks.iter().enumerate() {
+        let clips: Vec<Clip> = track
+            .clips
+            .iter()
+            .filter(|clip| selected.contains(&clip.id))
+            .cloned()
+            .collect();
+        if clips.is_empty() {
+            continue;
+        }
+        if target_track.is_none() && track.kind != ClipType::Audio {
+            target_track = Some(track_index);
+        }
+        for clip in &clips {
+            start_frame = start_frame.min(clip.start_frame);
+            end_frame = end_frame.max(clip.end_frame());
+        }
+        let mut child_track = Track::new(ids.next_id(), track.kind);
+        child_track.muted = track.muted;
+        child_track.hidden = track.hidden;
+        child_track.sync_locked = track.sync_locked;
+        child_track.clips = clips;
+        child.tracks.push(child_track);
+    }
+    let found: usize = child.tracks.iter().map(|track| track.clips.len()).sum();
+    if found != selected.len() {
+        return Err(EditError::Invalid(
+            "one or more clips selected for the compound no longer exist".into(),
+        ));
+    }
+    let target_track = target_track.ok_or_else(|| {
+        EditError::Invalid("a compound clip requires at least one visual clip".into())
+    })?;
+    if state.timeline.tracks[target_track]
+        .clips
+        .iter()
+        .any(|clip| {
+            !selected.contains(&clip.id)
+                && clip.start_frame < end_frame
+                && start_frame < clip.end_frame()
+        })
+    {
+        return Err(EditError::Invalid(
+            "compound selection span overlaps an unselected clip on its destination track".into(),
+        ));
+    }
+    for track in &mut child.tracks {
+        for clip in &mut track.clips {
+            clip.start_frame -= start_frame;
+        }
+    }
+    let duration_frames = end_frame - start_frame;
+
+    transact(
+        state,
+        "Create Compound Clip",
+        |affected| format!("Created compound clip {}", affected.join(", ")),
+        |st| {
+            for track in &mut st.timeline.tracks {
+                track.clips.retain(|clip| !selected.contains(&clip.id));
+            }
+            let sequence_id = ids.next_id();
+            let compound_id = ids.next_id();
+            st.timeline.nested_sequences.push(NestedSequence::new(
+                sequence_id.clone(),
+                name,
+                child,
+            ));
+            ops::clear_region(
+                &mut st.timeline,
+                target_track,
+                start_frame,
+                end_frame,
+                false,
+                ids,
+            );
+            st.timeline.tracks[target_track]
+                .clips
+                .push(Clip::new_nested(
+                    compound_id.clone(),
+                    sequence_id,
+                    start_frame,
+                    duration_frames,
+                ));
+            ops::sort_clips(&mut st.timeline.tracks[target_track]);
+            ops::prune_empty_tracks(&mut st.timeline);
+            Ok(vec![compound_id])
+        },
+    )
+}
+
+fn edit_nested_sequence(
+    state: &mut EditorState,
+    sequence_id: String,
+    command: EditCommand,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    if matches!(
+        &command,
+        EditCommand::Undo
+            | EditCommand::Redo
+            | EditCommand::CreateNestedSequence { .. }
+            | EditCommand::CreateNestedSequenceFromClips { .. }
+            | EditCommand::EditNestedSequence { .. }
+            | EditCommand::SetNestedSequenceTimeline { .. }
+            | EditCommand::RenameNestedSequence { .. }
+            | EditCommand::DissolveNestedSequence { .. }
+            | EditCommand::CreateFolder { .. }
+            | EditCommand::MoveToFolder { .. }
+            | EditCommand::RenameMedia { .. }
+            | EditCommand::RenameFolder { .. }
+            | EditCommand::DeleteMedia { .. }
+            | EditCommand::DeleteFolder { .. }
+            | EditCommand::SetTimelineSettings { .. }
+            | EditCommand::SaveScriptAssemblyPlan { .. }
+            | EditCommand::ApplyScriptAssemblyPlan { .. }
+            | EditCommand::SaveVoiceModel { .. }
+            | EditCommand::RevokeVoiceModel { .. }
+    ) {
+        return Err(EditError::Invalid(
+            "nested-sequence, media-library, and project-settings commands must target the root timeline".into(),
+        ));
+    }
+    let child = state
+        .timeline
+        .nested_sequences
+        .iter()
+        .find(|sequence| sequence.id == sequence_id)
+        .map(|sequence| sequence.timeline.clone())
+        .ok_or_else(|| EditError::Invalid(format!("Nested sequence not found: {sequence_id}")))?;
+
+    transact(
+        state,
+        "Edit Compound Clip",
+        |_| format!("Edited nested sequence {sequence_id}"),
+        |st| {
+            // Supply the root registry during the inner transaction so child
+            // references resolve against the same identities as preview/export.
+            // The target sequence's stored (pre-edit) contents are blanked in
+            // this temporary view: `editable` already represents those clips,
+            // and counting both copies would manufacture duplicate clip ids.
+            // The enclosing root transaction validates the fully replaced graph
+            // (including cycles through this sequence) before it can commit.
+            let mut editable = child;
+            editable.nested_sequences = st.timeline.nested_sequences.clone();
+            editable
+                .nested_sequences
+                .iter_mut()
+                .find(|sequence| sequence.id == sequence_id)
+                .expect("sequence was resolved before transaction")
+                .timeline = Timeline::new();
+            let mut child_state = EditorState::new(editable, st.manifest.clone());
+            let inner = apply(&mut child_state, command, ids)?;
+            child_state.timeline.nested_sequences.clear();
+            let sequence = st
+                .timeline
+                .nested_sequences
+                .iter_mut()
+                .find(|sequence| sequence.id == sequence_id)
+                .expect("sequence was resolved before transaction");
+            sequence.timeline = child_state.timeline;
+            st.manifest = child_state.manifest;
+            Ok(inner.affected_clip_ids)
+        },
+    )
+}
+
+fn set_nested_sequence_timeline(
+    state: &mut EditorState,
+    sequence_id: String,
+    timeline: Timeline,
+) -> Result<EditResult, EditError> {
+    if !timeline.nested_sequences.is_empty() {
+        return Err(EditError::Invalid(
+            "child timelines must reference the root nested sequence registry".into(),
+        ));
+    }
+    transact(
+        state,
+        "Edit Compound Clip",
+        |_| format!("Edited nested sequence {sequence_id}"),
+        |st| {
+            let sequence = st
+                .timeline
+                .nested_sequences
+                .iter_mut()
+                .find(|sequence| sequence.id == sequence_id)
+                .ok_or_else(|| {
+                    EditError::Invalid(format!("Nested sequence not found: {sequence_id}"))
+                })?;
+            sequence.timeline = timeline;
+            Ok(Vec::new())
+        },
+    )
+}
+
+fn rename_nested_sequence(
+    state: &mut EditorState,
+    sequence_id: String,
+    name: String,
+) -> Result<EditResult, EditError> {
+    let name = name.trim().to_string();
+    if name.is_empty() {
+        return Err(EditError::Invalid(
+            "nested sequence name must not be empty".into(),
+        ));
+    }
+    transact(
+        state,
+        "Rename Compound Clip",
+        |_| format!("Renamed nested sequence {sequence_id}"),
+        |st| {
+            let sequence = st
+                .timeline
+                .nested_sequences
+                .iter_mut()
+                .find(|sequence| sequence.id == sequence_id)
+                .ok_or_else(|| {
+                    EditError::Invalid(format!("Nested sequence not found: {sequence_id}"))
+                })?;
+            sequence.name = name;
+            Ok(Vec::new())
+        },
+    )
+}
+
+fn dissolve_nested_sequence(
+    state: &mut EditorState,
+    clip_id: String,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    let location = state
+        .find_clip(&clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+    let compound = state.timeline.tracks[location.track_index].clips[location.clip_index].clone();
+    let sequence_id = compound
+        .nested_sequence_id
+        .as_deref()
+        .ok_or_else(|| EditError::Invalid(format!("Clip is not a compound clip: {clip_id}")))?;
+    if (compound.speed - 1.0).abs() > f64::EPSILON || compound.reversed {
+        return Err(EditError::Invalid(
+            "retimed or reversed compound clips must be normalized before dissolve".into(),
+        ));
+    }
+    let has_parent_edits = (compound.volume - 1.0).abs() > f64::EPSILON
+        || compound.fade_in_frames != 0
+        || compound.fade_out_frames != 0
+        || (compound.opacity - 1.0).abs() > f64::EPSILON
+        || compound.transform != Transform::default()
+        || compound.crop != Crop::default()
+        || compound.link_group_id.is_some()
+        || compound.caption_group_id.is_some()
+        || compound.text_content.is_some()
+        || compound.text_style.is_some()
+        || compound.opacity_track.is_some()
+        || compound.position_track.is_some()
+        || compound.scale_track.is_some()
+        || compound.rotation_track.is_some()
+        || compound.crop_track.is_some()
+        || compound.volume_track.is_some()
+        || compound.color_grade.is_some()
+        || compound.chroma_key.is_some()
+        || !compound.masks.is_empty()
+        || !compound.effects.is_empty()
+        || compound.transition_out.is_some();
+    if has_parent_edits {
+        return Err(EditError::Invalid(
+            "compound clips with parent-level edits must be normalized before dissolve".into(),
+        ));
+    }
+    let child = state
+        .timeline
+        .nested_sequences
+        .iter()
+        .find(|sequence| sequence.id == sequence_id)
+        .map(|sequence| sequence.timeline.clone())
+        .ok_or_else(|| EditError::Invalid(format!("Nested sequence not found: {sequence_id}")))?;
+
+    transact(
+        state,
+        "Dissolve Compound Clip",
+        |affected| format!("Dissolved compound into {} clip(s)", affected.len()),
+        |st| {
+            let source_start = compound.trim_start_frame;
+            let source_end = source_start.saturating_add(compound.duration_frames);
+            let mut id_map = HashMap::new();
+            let mut link_counts: HashMap<String, usize> = HashMap::new();
+            for child_clip in child.tracks.iter().flat_map(|track| &track.clips) {
+                let visible_start = child_clip.start_frame.max(source_start);
+                let visible_end = child_clip.end_frame().min(source_end);
+                if visible_end <= visible_start {
+                    continue;
+                }
+                id_map.insert(child_clip.id.clone(), ids.next_id());
+                if let Some(group) = &child_clip.link_group_id {
+                    *link_counts.entry(group.clone()).or_default() += 1;
+                }
+            }
+            let mut link_map: HashMap<String, String> = HashMap::new();
+
+            ops::clear_region::remove_clip(&mut st.timeline, &clip_id);
+            let mut affected = Vec::new();
+
+            for child_track in child.tracks {
+                let requested = st.timeline.tracks.len();
+                let target = ops::insert_track(&mut st.timeline, requested, child_track.kind, ids);
+                st.timeline.tracks[target].muted = child_track.muted;
+                st.timeline.tracks[target].hidden = child_track.hidden;
+                st.timeline.tracks[target].sync_locked = child_track.sync_locked;
+
+                for mut child_clip in child_track.clips {
+                    let visible_start = child_clip.start_frame.max(source_start);
+                    let visible_end = child_clip.end_frame().min(source_end);
+                    if visible_end <= visible_start {
+                        continue;
+                    }
+                    let clipped_left = visible_start - child_clip.start_frame;
+                    let clipped_right = child_clip.end_frame() - visible_end;
+                    let old_id = child_clip.id.clone();
+                    child_clip.id = id_map
+                        .get(&old_id)
+                        .expect("visible child clip received a replacement id")
+                        .clone();
+                    child_clip.link_group_id = child_clip.link_group_id.take().and_then(|group| {
+                        (link_counts.get(&group).copied().unwrap_or(0) > 1).then(|| {
+                            link_map
+                                .entry(group)
+                                .or_insert_with(|| ids.next_id())
+                                .clone()
+                        })
+                    });
+                    child_clip.transition_out =
+                        child_clip.transition_out.take().and_then(|mut transition| {
+                            id_map.get(&transition.to_clip_id).map(|to_id| {
+                                transition.from_clip_id = child_clip.id.clone();
+                                transition.to_clip_id = to_id.clone();
+                                transition
+                            })
+                        });
+                    child_clip.start_frame = compound
+                        .start_frame
+                        .saturating_add(visible_start - source_start);
+                    child_clip.duration_frames = visible_end - visible_start;
+                    child_clip.trim_start_frame = child_clip
+                        .trim_start_frame
+                        .saturating_add((clipped_left as f64 * child_clip.speed).round() as i32);
+                    child_clip.trim_end_frame = child_clip
+                        .trim_end_frame
+                        .saturating_add((clipped_right as f64 * child_clip.speed).round() as i32);
+                    affected.push(child_clip.id.clone());
+                    st.timeline.tracks[target].clips.push(child_clip);
+                }
+                ops::sort_clips(&mut st.timeline.tracks[target]);
+            }
+            ops::prune_empty_tracks(&mut st.timeline);
+            Ok(affected)
+        },
+    )
+}
+
 // MARK: - Transaction helper
 
 /// Run `work` inside a transaction: snapshot, mutate, commit-if-changed. `work`
@@ -622,6 +1750,11 @@ fn transact(
             return Err(error);
         }
     };
+    prune_invalid_transitions(&mut state.timeline);
+    if let Err(reason) = state.timeline.validate_nested_sequences() {
+        state.restore(before);
+        return Err(EditError::Invalid(reason));
+    }
     let after = state.snapshot();
     let timeline_changed = before.timeline != after.timeline;
     let manifest_changed = before.manifest != after.manifest;
@@ -640,6 +1773,65 @@ fn transact(
     ))
 }
 
+/// Keep transition pair identity aligned with the actual cut graph after every
+/// transactional edit. A move/delete/trim must never leave a dormant transition
+/// that could later bind to a different neighbor.
+fn prune_invalid_transitions(timeline: &mut Timeline) {
+    for sequence in &mut timeline.nested_sequences {
+        prune_invalid_transitions(&mut sequence.timeline);
+    }
+    for track in &mut timeline.tracks {
+        if track.kind == ClipType::Audio {
+            for clip in &mut track.clips {
+                clip.transition_out = None;
+            }
+            continue;
+        }
+        let mut order: Vec<usize> = (0..track.clips.len()).collect();
+        order.sort_by_key(|&index| {
+            (
+                track.clips[index].start_frame,
+                track.clips[index].id.clone(),
+            )
+        });
+        let mut valid: HashMap<String, (String, i32)> = HashMap::new();
+        for pair in order.windows(2) {
+            let from = &track.clips[pair[0]];
+            let to = &track.clips[pair[1]];
+            if from.end_frame() != to.start_frame
+                || matches!(from.media_type, ClipType::Audio | ClipType::Text)
+                || matches!(to.media_type, ClipType::Audio | ClipType::Text)
+            {
+                continue;
+            }
+            valid.insert(
+                from.id.clone(),
+                (
+                    to.id.clone(),
+                    (from.duration_frames.min(to.duration_frames) / 2).max(1),
+                ),
+            );
+        }
+        for clip in &mut track.clips {
+            let Some(transition) = &mut clip.transition_out else {
+                continue;
+            };
+            let Some((to_id, maximum)) = valid.get(&clip.id) else {
+                clip.transition_out = None;
+                continue;
+            };
+            if (!transition.from_clip_id.is_empty() && transition.from_clip_id != clip.id)
+                || transition.to_clip_id != *to_id
+            {
+                clip.transition_out = None;
+                continue;
+            }
+            transition.from_clip_id = clip.id.clone();
+            transition.duration_frames = transition.duration_frames.clamp(1, *maximum);
+        }
+    }
+}
+
 fn result(
     state: &EditorState,
     timeline_changed: bool,
@@ -815,6 +2007,54 @@ fn add_clips_auto_track(
     )
 }
 
+fn add_clips_to_separate_auto_tracks(
+    state: &mut EditorState,
+    entries: Vec<ClipEntry>,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    if entries.is_empty() {
+        return Err(EditError::Invalid(
+            "Missing or empty 'entries' array".into(),
+        ));
+    }
+    for (index, entry) in entries.iter().enumerate() {
+        validate_auto_track_entry(entry, index)?;
+    }
+    transact(
+        state,
+        "Import Stems To Tracks",
+        |added| {
+            format!(
+                "Imported {} aligned stem(s): {}",
+                added.len(),
+                added.join(", ")
+            )
+        },
+        |current| {
+            let mut placed = Vec::with_capacity(entries.len());
+            for entry in &entries {
+                let kind = if entry.source_clip_type == ClipType::Audio {
+                    ClipType::Audio
+                } else {
+                    ClipType::Video
+                };
+                let at = current.timeline.tracks.len();
+                let track_index = ops::insert_track(&mut current.timeline, at, kind, ids);
+                let mut entry = entry.clone();
+                entry.track_index = track_index;
+                placed.extend(ops::place_clip(
+                    &mut current.timeline,
+                    &entry.to_spec(),
+                    track_index,
+                    None,
+                    ids,
+                ));
+            }
+            Ok(placed)
+        },
+    )
+}
+
 fn insert_track_cmd(
     state: &mut EditorState,
     kind: ClipType,
@@ -904,6 +2144,137 @@ fn swap_clips(state: &mut EditorState, a: String, b: String) -> Result<EditResul
     )
 }
 
+fn validate_registered_media(
+    state: &EditorState,
+    media: &MediaManifestEntry,
+) -> Result<(), EditError> {
+    if media.id.trim().is_empty() {
+        return Err(EditError::Invalid(
+            "generated media id must not be empty".into(),
+        ));
+    }
+    if state
+        .manifest
+        .entries
+        .iter()
+        .any(|entry| entry.id == media.id)
+    {
+        return Err(EditError::Invalid(format!(
+            "Media already exists: {}",
+            media.id
+        )));
+    }
+    if state
+        .manifest
+        .entries
+        .iter()
+        .any(|entry| entry.source == media.source)
+    {
+        return Err(EditError::Invalid(
+            "generated media source is already registered".into(),
+        ));
+    }
+    Ok(())
+}
+
+fn register_media_and_add_clip(
+    state: &mut EditorState,
+    media: MediaManifestEntry,
+    entry: ClipEntry,
+    auto_track: bool,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    validate_registered_media(state, &media)?;
+    if media.kind != entry.media_type || media.kind != entry.source_clip_type {
+        return Err(EditError::Invalid(
+            "generated media type must match the placed clip type".into(),
+        ));
+    }
+    if entry.media_ref != media.id {
+        return Err(EditError::Invalid(
+            "placed clip must reference the generated media id".into(),
+        ));
+    }
+
+    // Run the existing placement command against a disposable state so all of
+    // its overlap, track, duration, and manifest validation remains the single
+    // source of truth. Only its resulting document is copied into the one outer
+    // transaction; its temporary undo/version bookkeeping is discarded.
+    let mut candidate = state.clone();
+    candidate.manifest.entries.push(media);
+    let placement = if auto_track {
+        add_clips_auto_track(&mut candidate, vec![entry], ids)?
+    } else {
+        add_clips(&mut candidate, vec![entry], ids)?
+    };
+    let timeline = candidate.timeline;
+    let manifest = candidate.manifest;
+    let affected = placement.affected_clip_ids;
+
+    transact(
+        state,
+        "Add Motion Graphic",
+        |ids| format!("Added motion graphic: {}", ids.join(", ")),
+        move |current| {
+            current.timeline = timeline;
+            current.manifest = manifest;
+            Ok(affected)
+        },
+    )
+}
+
+fn register_media_and_swap_clip(
+    state: &mut EditorState,
+    media: MediaManifestEntry,
+    clip_id: String,
+    clear_masks: bool,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    validate_registered_media(state, &media)?;
+    let mut candidate = state.clone();
+    let media_ref = media.id.clone();
+    candidate.manifest.entries.push(media);
+    let seed_clip_id = clip_id.clone();
+    let replacement = swap_media(&mut candidate, clip_id, media_ref)?;
+    if clear_masks {
+        let clip = candidate
+            .timeline
+            .tracks
+            .iter_mut()
+            .flat_map(|track| track.clips.iter_mut())
+            .find(|clip| clip.id == seed_clip_id)
+            .ok_or_else(|| EditError::Invalid("replacement clip disappeared".into()))?;
+        clip.masks.clear();
+    }
+    let timeline = candidate.timeline;
+    let manifest = candidate.manifest;
+    let affected = replacement.affected_clip_ids;
+
+    // `ids` is intentionally accepted to keep the external-render commands on
+    // the same command signature; SwapMedia itself does not mint ids.
+    let _ = ids;
+    transact(
+        state,
+        if clear_masks {
+            "Remove Masked Object"
+        } else {
+            "Edit Motion Graphic"
+        },
+        move |ids| {
+            if clear_masks {
+                format!("Removed masked object: {}", ids.join(", "))
+            } else {
+                format!("Edited motion graphic: {}", ids.join(", "))
+            }
+        },
+        move |current| {
+            current.timeline = timeline;
+            current.manifest = manifest;
+            Ok(affected)
+        },
+    )
+}
+
 fn insert_clips(
     state: &mut EditorState,
     track_index: usize,
@@ -928,7 +2299,7 @@ fn insert_clips(
     }
     let target_type = state.timeline.tracks[track_index].kind;
     for (i, e) in entries.iter().enumerate() {
-        if !e.source_clip_type.is_compatible(target_type) {
+        if !e.media_type.is_compatible(target_type) {
             return Err(EditError::Invalid(format!(
                 "entries[{i}]: asset type is not compatible with the target track"
             )));
@@ -1189,8 +2560,22 @@ fn set_clip_properties(
         ));
     }
     for id in &clip_ids {
-        if state.find_clip(id).is_none() {
-            return Err(EditError::Invalid(format!("Clip not found: {id}")));
+        let location = state
+            .find_clip(id)
+            .ok_or_else(|| EditError::Invalid(format!("Clip not found: {id}")))?;
+        let clip = &state.timeline.tracks[location.track_index].clips[location.clip_index];
+        if clip.nested_sequence_id.is_some()
+            && (props
+                .speed
+                .is_some_and(|speed| (speed - 1.0).abs() > f64::EPSILON)
+                || props.reversed == Some(true)
+                || props.crop.is_some_and(|crop| crop != Crop::default())
+                || props.text_content.is_some()
+                || props.text_style.is_some())
+        {
+            return Err(EditError::Invalid(format!(
+                "compound clip {id} does not support retime, reverse, crop, or text properties"
+            )));
         }
     }
     if let Some(df) = props.duration_frames {
@@ -1223,111 +2608,520 @@ fn set_clip_properties(
             for id in &clip_ids {
                 apply_property_changes(&mut st.timeline, id, &props, false);
             }
-            for pid in &partners {
-                let is_text = st
-                    .find_clip(pid)
-                    .map(|l| st.timeline.tracks[l.track_index].clips[l.clip_index].media_type)
-                    == Some(ClipType::Text);
-                // Partners receive only timing (and drop it when text).
-                let partner_props = ClipProperties {
-                    duration_frames: if is_text { None } else { props.duration_frames },
-                    trim_start_frame: if is_text {
-                        None
-                    } else {
-                        props.trim_start_frame
-                    },
-                    trim_end_frame: if is_text { None } else { props.trim_end_frame },
-                    speed: if is_text { None } else { props.speed },
-                    ..Default::default()
+            for pid in &partners {
+                let is_text = st
+                    .find_clip(pid)
+                    .map(|l| st.timeline.tracks[l.track_index].clips[l.clip_index].media_type)
+                    == Some(ClipType::Text);
+                // Partners receive only timing (and drop it when text).
+                let partner_props = ClipProperties {
+                    duration_frames: if is_text { None } else { props.duration_frames },
+                    trim_start_frame: if is_text {
+                        None
+                    } else {
+                        props.trim_start_frame
+                    },
+                    trim_end_frame: if is_text { None } else { props.trim_end_frame },
+                    speed: if is_text { None } else { props.speed },
+                    ..Default::default()
+                };
+                apply_property_changes(&mut st.timeline, pid, &partner_props, true);
+            }
+            Ok(clip_ids.clone())
+        },
+    )
+}
+
+/// Apply a property bundle to one clip in place. `partner` marks the call as a
+/// linked-partner propagation (only timing fields are set then). 1:1 port of
+/// `applyPropertyChanges`.
+fn apply_property_changes(
+    timeline: &mut Timeline,
+    clip_id: &str,
+    props: &ClipProperties,
+    _partner: bool,
+) {
+    let Some((ti, ci)) = find(timeline, clip_id) else {
+        return;
+    };
+    let clip = &mut timeline.tracks[ti].clips[ci];
+
+    if props.duration_frames.is_some()
+        || props.trim_start_frame.is_some()
+        || props.trim_end_frame.is_some()
+        || props.speed.is_some()
+        || props.reversed.is_some()
+    {
+        clip.loudness_normalization = None;
+    }
+
+    if let Some(v) = props.duration_frames {
+        clip.duration_frames = v;
+        clip.clamp_keyframes_to_duration();
+        clip.clamp_fades_to_duration();
+    }
+    if let Some(v) = props.trim_start_frame {
+        clip.trim_start_frame = v;
+    }
+    if let Some(v) = props.trim_end_frame {
+        clip.trim_end_frame = v;
+    }
+    if let Some(v) = props.speed {
+        // When no explicit duration is given, recompute duration so the same
+        // source span plays at the new speed (mirrors applyPropertyChanges).
+        if props.duration_frames.is_none() && v > 0.0 {
+            let source_consumed = clip.duration_frames as f64 * clip.speed;
+            clip.duration_frames = (1).max((source_consumed / v).round() as i32);
+            clip.clamp_keyframes_to_duration();
+            clip.clamp_fades_to_duration();
+        }
+        clip.speed = v;
+    }
+    // Setting a scalar clears the matching keyframe track.
+    if let Some(v) = props.volume {
+        clip.volume = v;
+        clip.volume_track = None;
+    }
+    if let Some(v) = props.opacity {
+        clip.opacity = v;
+        clip.opacity_track = None;
+    }
+    if let Some(t) = props.transform {
+        clip.transform = t;
+    }
+    if let Some(c) = props.crop {
+        clip.crop = c;
+        clip.crop_track = None;
+    }
+    if let Some(v) = props.fade_in_frames {
+        clip.fade_in_frames = v.max(0);
+        clip.clamp_fades_to_duration();
+    }
+    if let Some(v) = props.fade_out_frames {
+        clip.fade_out_frames = v.max(0);
+        clip.clamp_fades_to_duration();
+    }
+    if let Some(i) = props.fade_in_interpolation {
+        clip.fade_in_interpolation = i;
+    }
+    if let Some(i) = props.fade_out_interpolation {
+        clip.fade_out_interpolation = i;
+    }
+    if let Some(f) = props.flip_horizontal {
+        clip.transform.flip_horizontal = f;
+    }
+    if let Some(f) = props.flip_vertical {
+        clip.transform.flip_vertical = f;
+    }
+    if let Some(reversed) = props.reversed {
+        clip.reversed = reversed;
+    }
+    if let Some(c) = &props.text_content {
+        clip.text_content = Some(c.clone());
+        clip.caption_translation_input = None;
+    }
+    if let Some(s) = &props.text_style {
+        clip.text_style = Some(s.clone());
+    }
+}
+
+fn apply_caption_translations(
+    state: &mut EditorState,
+    changes: Vec<CaptionTranslationChange>,
+) -> Result<EditResult, EditError> {
+    if changes.is_empty() {
+        return Err(EditError::Invalid(
+            "Missing or empty caption translation changes".into(),
+        ));
+    }
+    let mut seen = HashSet::new();
+    for change in &changes {
+        if !seen.insert(change.clip_id.as_str()) {
+            return Err(EditError::Invalid(format!(
+                "Duplicate caption clip: {}",
+                change.clip_id
+            )));
+        }
+        if change.translated_text.trim().is_empty() {
+            return Err(EditError::Invalid(format!(
+                "Translated text is empty for clip {}",
+                change.clip_id
+            )));
+        }
+        let location = state
+            .find_clip(&change.clip_id)
+            .ok_or_else(|| EditError::Invalid(format!("Clip not found: {}", change.clip_id)))?;
+        let clip = &state.timeline.tracks[location.track_index].clips[location.clip_index];
+        if clip.media_type != ClipType::Text || clip.caption_group_id.is_none() {
+            return Err(EditError::Invalid(format!(
+                "Clip is not a caption: {}",
+                change.clip_id
+            )));
+        }
+        if clip.text_content.as_deref() != Some(change.expected_source_text.as_str()) {
+            return Err(EditError::Invalid(format!(
+                "Caption text changed during review: {}",
+                change.clip_id
+            )));
+        }
+        if change.input.source_text != change.expected_source_text {
+            return Err(EditError::Invalid(format!(
+                "Caption provenance does not match source text: {}",
+                change.clip_id
+            )));
+        }
+    }
+    let n = changes.len();
+    transact(
+        state,
+        "Translate Captions",
+        move |_| format!("Translated {n} caption(s)"),
+        move |st| {
+            for change in &changes {
+                let (track_index, clip_index) = find(&st.timeline, &change.clip_id)
+                    .expect("caption translations were prevalidated");
+                let clip = &mut st.timeline.tracks[track_index].clips[clip_index];
+                clip.text_content = Some(change.translated_text.clone());
+                clip.caption_translation_input = Some(change.input.clone());
+            }
+            Ok(changes
+                .iter()
+                .map(|change| change.clip_id.clone())
+                .collect())
+        },
+    )
+}
+
+fn validate_script_assembly_plan(plan: &ScriptAssemblyPlan) -> Result<(), EditError> {
+    if plan.id.is_empty()
+        || plan.id.len() > 128
+        || plan.plan_hash.len() != 64
+        || !plan.plan_hash.bytes().all(|byte| byte.is_ascii_hexdigit())
+        || plan.planner.trim().is_empty()
+        || plan.planner.len() > 128
+        || plan.planner_version == 0
+        || plan.start_frame < 0
+        || plan.segments.is_empty()
+        || plan.segments.len() > 100
+    {
+        return Err(EditError::Invalid("invalid script assembly plan".into()));
+    }
+    for (index, segment) in plan.segments.iter().enumerate() {
+        if segment.script.trim().is_empty()
+            || segment.script.len() > 20_000
+            || segment.media_ref.is_empty()
+            || segment.media_ref.len() > 256
+            || segment
+                .narration_media_ref
+                .as_ref()
+                .is_some_and(|value| value.is_empty() || value.len() > 256)
+            || !(1..=36_000).contains(&segment.duration_frames)
+        {
+            return Err(EditError::Invalid(format!(
+                "invalid script assembly segment {index}"
+            )));
+        }
+        if segment.transition.is_some()
+            && (index + 1 == plan.segments.len()
+                || segment.duration_frames < 2
+                || plan.segments[index + 1].duration_frames < 2)
+        {
+            return Err(EditError::Invalid(format!(
+                "segment {index} transition requires a following segment with at least two frames"
+            )));
+        }
+    }
+    Ok(())
+}
+
+fn save_script_assembly_plan(
+    state: &mut EditorState,
+    plan: ScriptAssemblyPlan,
+) -> Result<EditResult, EditError> {
+    validate_script_assembly_plan(&plan)?;
+    let plan_id = plan.id.clone();
+    transact(
+        state,
+        "Plan Script Video",
+        |_| format!("Saved script assembly plan {plan_id}"),
+        move |st| {
+            if let Some(existing) = st
+                .timeline
+                .script_assembly_plans
+                .iter_mut()
+                .find(|existing| existing.id == plan.id)
+            {
+                *existing = plan.clone();
+            } else {
+                if st.timeline.script_assembly_plans.len() >= 20 {
+                    st.timeline.script_assembly_plans.remove(0);
+                }
+                st.timeline.script_assembly_plans.push(plan.clone());
+            }
+            Ok(Vec::new())
+        },
+    )
+}
+
+fn apply_script_assembly_plan(
+    state: &mut EditorState,
+    plan_id: String,
+    ids: &dyn IdGen,
+) -> Result<EditResult, EditError> {
+    let plan = state
+        .timeline
+        .script_assembly_plans
+        .iter()
+        .find(|plan| plan.id == plan_id)
+        .cloned()
+        .ok_or_else(|| EditError::Invalid(format!("script assembly plan not found: {plan_id}")))?;
+    validate_script_assembly_plan(&plan)?;
+    let fps = state.timeline.fps.max(1) as f64;
+    for (index, segment) in plan.segments.iter().enumerate() {
+        let visual = state
+            .manifest
+            .entries
+            .iter()
+            .find(|entry| entry.id == segment.media_ref)
+            .ok_or_else(|| {
+                EditError::Invalid(format!(
+                    "script segment {index} visual media not found: {}",
+                    segment.media_ref
+                ))
+            })?;
+        if !matches!(
+            visual.kind,
+            ClipType::Image | ClipType::Video | ClipType::Lottie
+        ) {
+            return Err(EditError::Invalid(format!(
+                "script segment {index} media must be visual"
+            )));
+        }
+        if visual.kind == ClipType::Video
+            && visual.duration > 0.0
+            && (visual.duration * fps).round() as i32 + 1 < segment.duration_frames
+        {
+            return Err(EditError::Invalid(format!(
+                "script segment {index} is longer than its video source"
+            )));
+        }
+        if let Some(narration_ref) = &segment.narration_media_ref {
+            let narration = state
+                .manifest
+                .entries
+                .iter()
+                .find(|entry| entry.id == *narration_ref)
+                .ok_or_else(|| {
+                    EditError::Invalid(format!(
+                        "script segment {index} narration media not found: {narration_ref}"
+                    ))
+                })?;
+            if !narration
+                .has_audio
+                .unwrap_or(narration.kind == ClipType::Audio)
+                || !matches!(narration.kind, ClipType::Audio | ClipType::Video)
+            {
+                return Err(EditError::Invalid(format!(
+                    "script segment {index} narration must contain audio"
+                )));
+            }
+            let narration_frames = (narration.duration * fps).round() as i32;
+            if narration.duration > 0.0 && (narration_frames - segment.duration_frames).abs() > 1 {
+                return Err(EditError::Invalid(format!(
+                    "script segment {index} narration duration must match within one frame"
+                )));
+            }
+        }
+    }
+
+    transact(
+        state,
+        "Build Script Video",
+        |affected| format!("Built script video with {} clip(s)", affected.len()),
+        move |st| {
+            let visual_track_id = ids.next_id();
+            let mut visual_track = Track::new(visual_track_id, ClipType::Video);
+            let mut narration_track = plan
+                .segments
+                .iter()
+                .any(|segment| segment.narration_media_ref.is_some())
+                .then(|| Track::new(ids.next_id(), ClipType::Audio));
+            let mut cursor = plan.start_frame;
+            let mut affected = Vec::new();
+            for segment in &plan.segments {
+                let media = st
+                    .manifest
+                    .entries
+                    .iter()
+                    .find(|entry| entry.id == segment.media_ref)
+                    .expect("script assembly media was prevalidated");
+                let mut clip = Clip::new(
+                    ids.next_id(),
+                    segment.media_ref.clone(),
+                    cursor,
+                    segment.duration_frames,
+                );
+                clip.media_type = media.kind;
+                clip.source_clip_type = media.kind;
+                if segment.narration_media_ref.is_some() {
+                    clip.volume = 0.0;
+                }
+                affected.push(clip.id.clone());
+                visual_track.clips.push(clip);
+                if let (Some(track), Some(narration_ref)) =
+                    (&mut narration_track, &segment.narration_media_ref)
+                {
+                    let narration = st
+                        .manifest
+                        .entries
+                        .iter()
+                        .find(|entry| entry.id == *narration_ref)
+                        .expect("script narration was prevalidated");
+                    let mut clip = Clip::new(
+                        ids.next_id(),
+                        narration_ref.clone(),
+                        cursor,
+                        segment.duration_frames,
+                    );
+                    clip.media_type = ClipType::Audio;
+                    clip.source_clip_type = narration.kind;
+                    affected.push(clip.id.clone());
+                    track.clips.push(clip);
+                }
+                cursor = cursor.saturating_add(segment.duration_frames);
+            }
+            for index in 0..visual_track.clips.len().saturating_sub(1) {
+                let Some(kind) = plan.segments[index].transition else {
+                    continue;
                 };
-                apply_property_changes(&mut st.timeline, pid, &partner_props, true);
+                let from = &visual_track.clips[index];
+                let to = &visual_track.clips[index + 1];
+                let duration_frames = 12
+                    .min(from.duration_frames / 2)
+                    .min(to.duration_frames / 2)
+                    .max(1);
+                visual_track.clips[index].transition_out = Some(Transition {
+                    from_clip_id: from.id.clone(),
+                    to_clip_id: to.id.clone(),
+                    kind,
+                    duration_frames,
+                });
             }
-            Ok(clip_ids.clone())
+            st.timeline.tracks.insert(0, visual_track);
+            if let Some(track) = narration_track {
+                st.timeline.tracks.push(track);
+            }
+            Ok(affected)
         },
     )
 }
 
-/// Apply a property bundle to one clip in place. `partner` marks the call as a
-/// linked-partner propagation (only timing fields are set then). 1:1 port of
-/// `applyPropertyChanges`.
-fn apply_property_changes(
-    timeline: &mut Timeline,
-    clip_id: &str,
-    props: &ClipProperties,
-    _partner: bool,
-) {
-    let Some((ti, ci)) = find(timeline, clip_id) else {
-        return;
-    };
-    let clip = &mut timeline.tracks[ti].clips[ci];
+fn valid_sha256(value: &str) -> bool {
+    value.len() == 64 && value.bytes().all(|byte| byte.is_ascii_hexdigit())
+}
 
-    if let Some(v) = props.duration_frames {
-        clip.duration_frames = v;
-        clip.clamp_keyframes_to_duration();
-        clip.clamp_fades_to_duration();
-    }
-    if let Some(v) = props.trim_start_frame {
-        clip.trim_start_frame = v;
-    }
-    if let Some(v) = props.trim_end_frame {
-        clip.trim_end_frame = v;
-    }
-    if let Some(v) = props.speed {
-        // When no explicit duration is given, recompute duration so the same
-        // source span plays at the new speed (mirrors applyPropertyChanges).
-        if props.duration_frames.is_none() && v > 0.0 {
-            let source_consumed = clip.duration_frames as f64 * clip.speed;
-            clip.duration_frames = (1).max((source_consumed / v).round() as i32);
-            clip.clamp_keyframes_to_duration();
-            clip.clamp_fades_to_duration();
-        }
-        clip.speed = v;
-    }
-    // Setting a scalar clears the matching keyframe track.
-    if let Some(v) = props.volume {
-        clip.volume = v;
-        clip.volume_track = None;
-    }
-    if let Some(v) = props.opacity {
-        clip.opacity = v;
-        clip.opacity_track = None;
-    }
-    if let Some(t) = props.transform {
-        clip.transform = t;
-    }
-    if let Some(c) = props.crop {
-        clip.crop = c;
-        clip.crop_track = None;
-    }
-    if let Some(v) = props.fade_in_frames {
-        clip.fade_in_frames = v.max(0);
-        clip.clamp_fades_to_duration();
-    }
-    if let Some(v) = props.fade_out_frames {
-        clip.fade_out_frames = v.max(0);
-        clip.clamp_fades_to_duration();
-    }
-    if let Some(i) = props.fade_in_interpolation {
-        clip.fade_in_interpolation = i;
-    }
-    if let Some(i) = props.fade_out_interpolation {
-        clip.fade_out_interpolation = i;
-    }
-    if let Some(f) = props.flip_horizontal {
-        clip.transform.flip_horizontal = f;
+fn validate_voice_model(record: &VoiceModelRecord) -> Result<(), EditError> {
+    let valid_token = |value: &str, max: usize| {
+        !value.trim().is_empty()
+            && value.len() <= max
+            && value
+                .bytes()
+                .all(|byte| byte.is_ascii_alphanumeric() || b"-_.:/".contains(&byte))
+    };
+    if !valid_token(&record.id, 128)
+        || !valid_token(&record.provider, 64)
+        || record.provider_voice_id.is_empty()
+        || record.provider_voice_id.len() > 256
+        || !record
+            .provider_voice_id
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'-' | b'_'))
+        || !valid_token(&record.model, 256)
+        || !valid_token(&record.consent_id, 256)
+        || !valid_token(&record.source_audio_asset_id, 256)
+        || !valid_sha256(&record.source_audio_sha256)
+        || !valid_sha256(&record.request_hash)
+        || record.voice_name.trim().is_empty()
+        || record.voice_name.len() > 128
+    {
+        return Err(EditError::Invalid("invalid cloned voice metadata".into()));
     }
-    if let Some(f) = props.flip_vertical {
-        clip.transform.flip_vertical = f;
+    Ok(())
+}
+
+fn save_voice_model(
+    state: &mut EditorState,
+    record: VoiceModelRecord,
+) -> Result<EditResult, EditError> {
+    validate_voice_model(&record)?;
+    let source = state
+        .manifest
+        .entries
+        .iter()
+        .find(|entry| entry.id == record.source_audio_asset_id)
+        .ok_or_else(|| EditError::Invalid("voice reference audio does not exist".into()))?;
+    if source.kind != ClipType::Audio || !source.has_audio.unwrap_or(true) {
+        return Err(EditError::Invalid(
+            "voice reference must be an audio asset".into(),
+        ));
     }
-    if let Some(reversed) = props.reversed {
-        clip.reversed = reversed;
+    if state.timeline.voice_models.iter().any(|existing| {
+        existing.id == record.id
+            || (existing.provider == record.provider
+                && existing.provider_voice_id == record.provider_voice_id)
+    }) {
+        return Err(EditError::Invalid(
+            "provider voice identity is already registered".into(),
+        ));
     }
-    if let Some(c) = &props.text_content {
-        clip.text_content = Some(c.clone());
+    if state.timeline.voice_models.len() >= 100 {
+        return Err(EditError::Invalid(
+            "project voice model limit reached".into(),
+        ));
     }
-    if let Some(s) = &props.text_style {
-        clip.text_style = Some(s.clone());
+    let record_id = record.id.clone();
+    state.timeline.voice_models.push(record);
+    state.commit_irreversible();
+    Ok(result(
+        state,
+        true,
+        false,
+        "Enroll Voice Clone",
+        Vec::new(),
+        &format!("Enrolled voice clone {record_id}"),
+    ))
+}
+
+fn revoke_voice_model(
+    state: &mut EditorState,
+    voice_model_id: String,
+) -> Result<EditResult, EditError> {
+    let record = state
+        .timeline
+        .voice_models
+        .iter_mut()
+        .find(|record| record.id == voice_model_id)
+        .ok_or_else(|| EditError::Invalid("voice model not found".into()))?;
+    if record.revoked {
+        return Ok(result(
+            state,
+            false,
+            false,
+            "Revoke Voice Clone",
+            Vec::new(),
+            "Voice clone was already revoked",
+        ));
     }
+    record.revoked = true;
+    state.commit_irreversible();
+    Ok(result(
+        state,
+        true,
+        false,
+        "Revoke Voice Clone",
+        Vec::new(),
+        &format!("Revoked voice clone {voice_model_id}"),
+    ))
 }
 
 fn set_keyframes(
@@ -1336,8 +3130,17 @@ fn set_keyframes(
     property: KeyframeProperty,
     payload: KeyframePayload,
 ) -> Result<EditResult, EditError> {
-    if state.find_clip(&clip_id).is_none() {
-        return Err(EditError::Invalid(format!("Clip not found: {clip_id}")));
+    let location = state
+        .find_clip(&clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+    if property == KeyframeProperty::Crop
+        && state.timeline.tracks[location.track_index].clips[location.clip_index]
+            .nested_sequence_id
+            .is_some()
+    {
+        return Err(EditError::Invalid(
+            "compound clips do not support crop keyframes".into(),
+        ));
     }
     // Type/property agreement check.
     let ok = matches!(
@@ -1398,6 +3201,11 @@ fn stamp_keyframe(
         .find_clip(&clip_id)
         .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
     let clip = &state.timeline.tracks[loc.track_index].clips[loc.clip_index];
+    if property == KeyframeProperty::Crop && clip.nested_sequence_id.is_some() {
+        return Err(EditError::Invalid(
+            "compound clips do not support crop keyframes".into(),
+        ));
+    }
     if !clip.contains(frame) {
         return Err(EditError::Invalid(format!(
             "Frame {frame} is outside clip range ({}..{})",
@@ -1481,6 +3289,11 @@ fn upsert_keyframe(
         .find_clip(&clip_id)
         .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
     let clip = &state.timeline.tracks[loc.track_index].clips[loc.clip_index];
+    if property == KeyframeProperty::Crop && clip.nested_sequence_id.is_some() {
+        return Err(EditError::Invalid(
+            "compound clips do not support crop keyframes".into(),
+        ));
+    }
     if !clip.contains(frame) {
         return Err(EditError::Invalid(format!(
             "Frame {frame} is outside clip range ({}..{})",
@@ -1791,78 +3604,433 @@ fn set_keyframe_interpolation(
 // inside the shared `withTimelineSwap` transaction (snapshot -> mutate ->
 // commit-if-changed + version bump), so undo/redo and versioning come for free.
 
-/// Validate that `clip_ids` is non-empty and every id resolves, then run `mutate`
-/// for each clip inside one transaction. Shared by the four effect setters.
-fn set_clip_effect_field(
+/// Validate that `clip_ids` is non-empty and every id resolves, then run `mutate`
+/// for each clip inside one transaction. Shared by the four effect setters.
+fn set_clip_effect_field(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    action_name: &'static str,
+    mutate: impl Fn(&mut opentake_domain::Clip),
+) -> Result<EditResult, EditError> {
+    if clip_ids.is_empty() {
+        return Err(EditError::Invalid(
+            "Missing or empty 'clipIds' array".into(),
+        ));
+    }
+    for id in &clip_ids {
+        if state.find_clip(id).is_none() {
+            return Err(EditError::Invalid(format!("Clip not found: {id}")));
+        }
+    }
+    let n = clip_ids.len();
+    transact(
+        state,
+        action_name,
+        move |_| format!("Updated {n} clip(s)"),
+        move |st| {
+            for id in &clip_ids {
+                if let Some((ti, ci)) = find(&st.timeline, id) {
+                    mutate(&mut st.timeline.tracks[ti].clips[ci]);
+                }
+            }
+            Ok(clip_ids.clone())
+        },
+    )
+}
+
+fn reject_compound_effect_targets(
+    state: &EditorState,
+    clip_ids: &[String],
+    adding_effect: bool,
+) -> Result<(), EditError> {
+    if !adding_effect {
+        return Ok(());
+    }
+    for id in clip_ids {
+        let location = state
+            .find_clip(id)
+            .ok_or_else(|| EditError::Invalid(format!("Clip not found: {id}")))?;
+        if state.timeline.tracks[location.track_index].clips[location.clip_index]
+            .nested_sequence_id
+            .is_some()
+        {
+            return Err(EditError::Invalid(format!(
+                "compound clip {id} does not support direct pixel effects"
+            )));
+        }
+    }
+    Ok(())
+}
+
+fn set_color_grade(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    grade: Option<ColorGrade>,
+) -> Result<EditResult, EditError> {
+    if let Some(grade) = grade {
+        grade
+            .validate()
+            .map_err(|error| EditError::Invalid(format!("invalid color grade: {error}")))?;
+    }
+    reject_compound_effect_targets(state, &clip_ids, grade.is_some())?;
+    set_clip_effect_field(state, clip_ids, "Set Color Grade", move |clip| {
+        clip.color_grade = grade;
+        clip.color_match_input = None;
+    })
+}
+
+fn apply_color_match(
+    state: &mut EditorState,
+    clip_id: String,
+    grade: ColorGrade,
+    input: ColorMatchInput,
+) -> Result<EditResult, EditError> {
+    grade
+        .validate()
+        .map_err(|error| EditError::Invalid(format!("invalid color match grade: {error}")))?;
+    reject_compound_effect_targets(state, std::slice::from_ref(&clip_id), true)?;
+    set_clip_effect_field(state, vec![clip_id], "Match Color", move |clip| {
+        clip.color_grade = Some(grade);
+        clip.color_match_input = Some(input.clone());
+    })
+}
+
+fn set_lut(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    lut: Option<LutReference>,
+) -> Result<EditResult, EditError> {
+    if let Some(reference) = &lut {
+        reference
+            .validate()
+            .map_err(|error| EditError::Invalid(format!("invalid LUT reference: {error}")))?;
+    }
+    reject_compound_effect_targets(state, &clip_ids, lut.is_some())?;
+    set_clip_effect_field(state, clip_ids, "Set LUT", move |clip| {
+        clip.lut = lut.clone();
+    })
+}
+
+fn set_chroma_key(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    chroma_key: Option<ChromaKey>,
+) -> Result<EditResult, EditError> {
+    reject_compound_effect_targets(state, &clip_ids, chroma_key.is_some())?;
+    set_clip_effect_field(state, clip_ids, "Set Chroma Key", move |clip| {
+        clip.chroma_key = chroma_key;
+    })
+}
+
+fn set_masks(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    masks: Vec<Mask>,
+) -> Result<EditResult, EditError> {
+    if masks.len() > MAX_MASKS_PER_CLIP {
+        return Err(EditError::Invalid(format!(
+            "a clip supports at most {MAX_MASKS_PER_CLIP} masks"
+        )));
+    }
+    for (index, mask) in masks.iter().enumerate() {
+        if let MaskShape::Poly { points } = &mask.shape {
+            if points.len() < 3 || points.len() > MAX_POLYGON_MASK_POINTS {
+                return Err(EditError::Invalid(format!(
+                    "mask {index} polygon must contain 3..={MAX_POLYGON_MASK_POINTS} points"
+                )));
+            }
+        }
+    }
+    reject_compound_effect_targets(state, &clip_ids, !masks.is_empty())?;
+    set_clip_effect_field(state, clip_ids, "Set Masks", move |clip| {
+        clip.masks = masks.clone();
+    })
+}
+
+fn set_effects(
+    state: &mut EditorState,
+    clip_ids: Vec<String>,
+    effects: Vec<Effect>,
+) -> Result<EditResult, EditError> {
+    opentake_domain::validate_effect_chain(&effects)
+        .map_err(|error| EditError::Invalid(error.to_string()))?;
+    reject_compound_effect_targets(state, &clip_ids, !effects.is_empty())?;
+    set_clip_effect_field(state, clip_ids, "Set Effects", move |clip| {
+        clip.effects = effects.clone();
+    })
+}
+
+fn set_loudness_normalization(
+    state: &mut EditorState,
+    clip_id: String,
+    normalization: Option<LoudnessNormalization>,
+) -> Result<EditResult, EditError> {
+    let location = state
+        .find_clip(&clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+    let clip = &state.timeline.tracks[location.track_index].clips[location.clip_index];
+    if !matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+        || clip.nested_sequence_id.is_some()
+    {
+        return Err(EditError::Invalid(
+            "loudness normalization requires an ordinary audio-bearing clip".to_string(),
+        ));
+    }
+    if let Some(value) = normalization {
+        value.validate().map_err(|error| {
+            EditError::Invalid(format!("invalid loudness normalization: {error}"))
+        })?;
+    }
+    transact(
+        state,
+        if normalization.is_some() {
+            "Normalize Loudness"
+        } else {
+            "Reset Loudness"
+        },
+        |_| "Updated clip loudness".to_string(),
+        move |st| {
+            let (track_index, clip_index) = find(&st.timeline, &clip_id)
+                .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+            st.timeline.tracks[track_index].clips[clip_index].loudness_normalization =
+                normalization;
+            Ok(vec![clip_id.clone()])
+        },
+    )
+}
+
+fn set_audio_denoise(
     state: &mut EditorState,
-    clip_ids: Vec<String>,
-    action_name: &'static str,
-    mutate: impl Fn(&mut opentake_domain::Clip),
+    clip_id: String,
+    denoise: Option<AudioDenoise>,
 ) -> Result<EditResult, EditError> {
-    if clip_ids.is_empty() {
+    let location = state
+        .find_clip(&clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+    let clip = &state.timeline.tracks[location.track_index].clips[location.clip_index];
+    if !matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+        || clip.nested_sequence_id.is_some()
+    {
         return Err(EditError::Invalid(
-            "Missing or empty 'clipIds' array".into(),
+            "audio denoise requires an ordinary audio-bearing clip".to_string(),
         ));
     }
-    for id in &clip_ids {
-        if state.find_clip(id).is_none() {
-            return Err(EditError::Invalid(format!("Clip not found: {id}")));
-        }
+    if let Some(value) = denoise {
+        value
+            .validate()
+            .map_err(|error| EditError::Invalid(format!("invalid audio denoise: {error}")))?;
     }
-    let n = clip_ids.len();
     transact(
         state,
-        action_name,
-        move |_| format!("Updated {n} clip(s)"),
+        if denoise.is_some() {
+            "Apply Audio Denoise"
+        } else {
+            "Reset Audio Denoise"
+        },
+        |_| "Updated clip audio denoise".to_string(),
         move |st| {
-            for id in &clip_ids {
-                if let Some((ti, ci)) = find(&st.timeline, id) {
-                    mutate(&mut st.timeline.tracks[ti].clips[ci]);
-                }
-            }
-            Ok(clip_ids.clone())
+            let (track_index, clip_index) = find(&st.timeline, &clip_id)
+                .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+            st.timeline.tracks[track_index].clips[clip_index].audio_denoise = denoise;
+            Ok(vec![clip_id.clone()])
         },
     )
 }
 
-fn set_color_grade(
+fn stabilization_clip<'a>(state: &'a EditorState, clip_id: &str) -> Result<&'a Clip, EditError> {
+    let location = state
+        .find_clip(clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {clip_id}")))?;
+    let clip = &state.timeline.tracks[location.track_index].clips[location.clip_index];
+    if clip.media_type != ClipType::Video || clip.nested_sequence_id.is_some() {
+        return Err(EditError::Invalid(format!(
+            "stabilization requires an ordinary video clip: {clip_id}"
+        )));
+    }
+    Ok(clip)
+}
+
+fn apply_stabilization(
     state: &mut EditorState,
-    clip_ids: Vec<String>,
-    grade: Option<ColorGrade>,
+    clip_id: String,
+    solution: StabilizationTrack,
 ) -> Result<EditResult, EditError> {
-    set_clip_effect_field(state, clip_ids, "Set Color Grade", move |clip| {
-        clip.color_grade = grade;
+    solution.validate().map_err(EditError::Invalid)?;
+    let clip = stabilization_clip(state, &clip_id)?;
+    if solution.source_identity != clip.media_ref {
+        return Err(EditError::Invalid(format!(
+            "stabilization source identity {} does not match clip source {}",
+            solution.source_identity, clip.media_ref
+        )));
+    }
+    set_clip_effect_field(state, vec![clip_id], "Apply Stabilization", move |clip| {
+        clip.stabilization = Some(solution.clone());
     })
 }
 
-fn set_chroma_key(
+fn adjust_stabilization(
     state: &mut EditorState,
-    clip_ids: Vec<String>,
-    chroma_key: Option<ChromaKey>,
+    clip_id: String,
+    strength: Option<f64>,
+    crop_margin: Option<f64>,
 ) -> Result<EditResult, EditError> {
-    set_clip_effect_field(state, clip_ids, "Set Chroma Key", move |clip| {
-        clip.chroma_key = chroma_key;
+    if strength.is_none() && crop_margin.is_none() {
+        return Err(EditError::Invalid(
+            "strength or cropMargin is required".to_string(),
+        ));
+    }
+    if strength.is_some_and(|value| !value.is_finite() || !(0.0..=1.0).contains(&value)) {
+        return Err(EditError::Invalid(
+            "stabilization strength must be finite and within 0..=1".to_string(),
+        ));
+    }
+    if crop_margin.is_some_and(|value| !value.is_finite() || !(0.0..=0.5).contains(&value)) {
+        return Err(EditError::Invalid(
+            "stabilization crop margin must be finite and within 0..=0.5".to_string(),
+        ));
+    }
+    let clip = stabilization_clip(state, &clip_id)?;
+    if clip.stabilization.is_none() {
+        return Err(EditError::Invalid(format!(
+            "Clip has no stabilization analysis: {clip_id}"
+        )));
+    }
+    set_clip_effect_field(state, vec![clip_id], "Adjust Stabilization", move |clip| {
+        if let Some(solution) = &mut clip.stabilization {
+            if let Some(value) = strength {
+                solution.strength = value;
+            }
+            if let Some(value) = crop_margin {
+                solution.crop_margin = value;
+            }
+        }
     })
 }
 
-fn set_masks(
-    state: &mut EditorState,
-    clip_ids: Vec<String>,
-    masks: Vec<Mask>,
-) -> Result<EditResult, EditError> {
-    set_clip_effect_field(state, clip_ids, "Set Masks", move |clip| {
-        clip.masks = masks.clone();
+fn reset_stabilization(state: &mut EditorState, clip_id: String) -> Result<EditResult, EditError> {
+    stabilization_clip(state, &clip_id)?;
+    set_clip_effect_field(state, vec![clip_id], "Reset Stabilization", |clip| {
+        clip.stabilization = None;
     })
 }
 
-fn set_effects(
+fn set_transition(
     state: &mut EditorState,
-    clip_ids: Vec<String>,
-    effects: Vec<Effect>,
+    from_clip_id: String,
+    to_clip_id: String,
+    kind: Option<TransitionKind>,
+    duration_frames: i32,
 ) -> Result<EditResult, EditError> {
-    set_clip_effect_field(state, clip_ids, "Set Effects", move |clip| {
-        clip.effects = effects.clone();
-    })
+    let from_location = state
+        .find_clip(&from_clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {from_clip_id}")))?;
+
+    if kind.is_some()
+        && state.timeline.tracks[from_location.track_index].clips[from_location.clip_index]
+            .nested_sequence_id
+            .is_some()
+    {
+        return Err(EditError::Invalid(
+            "compound clips do not support direct transitions".into(),
+        ));
+    }
+
+    // Clearing is allowed even after the pair stopped being adjacent so stale
+    // metadata can always be removed safely. Pair identity must still match.
+    if kind.is_none() {
+        return transact(
+            state,
+            "Remove Transition",
+            |_| "Removed transition".to_string(),
+            |st| {
+                let clip = &mut st.timeline.tracks[from_location.track_index].clips
+                    [from_location.clip_index];
+                if clip.transition_out.as_ref().is_some_and(|transition| {
+                    (transition.from_clip_id.is_empty() || transition.from_clip_id == from_clip_id)
+                        && transition.to_clip_id == to_clip_id
+                }) {
+                    clip.transition_out = None;
+                }
+                Ok(vec![from_clip_id.clone(), to_clip_id.clone()])
+            },
+        );
+    }
+
+    if duration_frames < 1 {
+        return Err(EditError::Invalid(format!(
+            "durationFrames must be >= 1 (got {duration_frames})"
+        )));
+    }
+    let to_location = state
+        .find_clip(&to_clip_id)
+        .ok_or_else(|| EditError::Invalid(format!("Clip not found: {to_clip_id}")))?;
+    if state.timeline.tracks[to_location.track_index].clips[to_location.clip_index]
+        .nested_sequence_id
+        .is_some()
+    {
+        return Err(EditError::Invalid(
+            "compound clips do not support direct transitions".into(),
+        ));
+    }
+    if from_location.track_index != to_location.track_index {
+        return Err(EditError::Invalid(
+            "A transition requires clips on the same track".into(),
+        ));
+    }
+    let track = &state.timeline.tracks[from_location.track_index];
+    if track.kind == ClipType::Audio {
+        return Err(EditError::Invalid(
+            "Visual transitions are unavailable on audio tracks".into(),
+        ));
+    }
+    let from = &track.clips[from_location.clip_index];
+    let to = &track.clips[to_location.clip_index];
+    if matches!(from.media_type, ClipType::Audio | ClipType::Text)
+        || matches!(to.media_type, ClipType::Audio | ClipType::Text)
+    {
+        return Err(EditError::Invalid(
+            "A transition requires two visual source clips".into(),
+        ));
+    }
+    if from.end_frame() != to.start_frame {
+        return Err(EditError::Invalid(
+            "A transition requires an exact adjacent clip boundary".into(),
+        ));
+    }
+    let mut ordered: Vec<&opentake_domain::Clip> = track.clips.iter().collect();
+    ordered.sort_by_key(|clip| (clip.start_frame, clip.id.as_str()));
+    let successor = ordered
+        .iter()
+        .position(|clip| clip.id == from_clip_id)
+        .and_then(|index| ordered.get(index + 1));
+    if successor.map(|clip| clip.id.as_str()) != Some(to_clip_id.as_str()) {
+        return Err(EditError::Invalid(
+            "A transition requires the immediate next clip".into(),
+        ));
+    }
+
+    let maximum = (from.duration_frames.min(to.duration_frames) / 2).max(1);
+    if duration_frames > maximum {
+        return Err(EditError::Invalid(format!(
+            "durationFrames exceeds the available transition handle ({duration_frames} > {maximum})"
+        )));
+    }
+    let kind = kind.expect("kind checked above");
+    transact(
+        state,
+        "Set Transition",
+        |_| format!("Set transition from {from_clip_id} to {to_clip_id}"),
+        |st| {
+            st.timeline.tracks[from_location.track_index].clips[from_location.clip_index]
+                .transition_out = Some(Transition {
+                from_clip_id: from_clip_id.clone(),
+                to_clip_id: to_clip_id.clone(),
+                kind,
+                duration_frames,
+            });
+            Ok(vec![from_clip_id.clone(), to_clip_id.clone()])
+        },
+    )
 }
 
 fn ripple_delete_ranges(
@@ -2583,6 +4751,8 @@ fn swap_media(
                 if let Some(loc) = st.find_clip(tid) {
                     st.timeline.tracks[loc.track_index].clips[loc.clip_index].media_ref =
                         media_ref.clone();
+                    st.timeline.tracks[loc.track_index].clips[loc.clip_index]
+                        .loudness_normalization = None;
                     affected.push(tid.clone());
                 }
             }
@@ -2650,7 +4820,10 @@ fn validate_entry(state: &EditorState, e: &ClipEntry, i: usize) -> Result<(), Ed
         )));
     }
     let target = state.timeline.tracks[e.track_index].kind;
-    if !e.source_clip_type.is_compatible(target) {
+    // Destination compatibility is determined by the placed lane type. A
+    // linked audio clip can legitimately retain `source_clip_type = Video`
+    // because it still resolves audio from the original video asset.
+    if !e.media_type.is_compatible(target) {
         return Err(EditError::Invalid(format!(
             "entries[{i}]: asset type is not compatible with the destination track"
         )));
@@ -2685,12 +4858,12 @@ fn validate_entry(state: &EditorState, e: &ClipEntry, i: usize) -> Result<(), Ed
 }
 
 fn validate_auto_track_entry(e: &ClipEntry, i: usize) -> Result<(), EditError> {
-    let target = if e.source_clip_type == ClipType::Audio {
+    let target = if e.media_type == ClipType::Audio {
         ClipType::Audio
     } else {
         ClipType::Video
     };
-    if !e.source_clip_type.is_compatible(target) {
+    if !e.media_type.is_compatible(target) {
         return Err(EditError::Invalid(format!(
             "entries[{i}]: asset type is not compatible with an auto-created track"
         )));
@@ -4248,6 +6421,305 @@ mod add_captions_tests {
         // State untouched by the refusal.
         assert_eq!(state.timeline.tracks.len(), 2);
     }
+
+    #[test]
+    fn caption_translation_preserves_identity_timing_and_is_one_undo_step() {
+        let mut state = state_with_video_and_audio();
+        let ids = SeqIdGen::new("cap-");
+        apply(
+            &mut state,
+            EditCommand::AddCaptions {
+                entries: vec![caption("Hello", 3, 17, "g"), caption("World", 25, 19, "g")],
+            },
+            &ids,
+        )
+        .unwrap();
+        let captions = state.timeline.tracks[0].clips.clone();
+        let changes = captions
+            .iter()
+            .zip(["你好", "世界"])
+            .map(|(clip, translated)| {
+                let source = clip.text_content.clone().unwrap();
+                CaptionTranslationChange {
+                    clip_id: clip.id.clone(),
+                    expected_source_text: source.clone(),
+                    translated_text: translated.into(),
+                    input: CaptionTranslationInput {
+                        source_text: source,
+                        source_locale: "en-US".into(),
+                        target_locale: "zh-CN".into(),
+                        provider: "mock".into(),
+                        model: "mock-v1".into(),
+                    },
+                }
+            })
+            .collect();
+        let result = apply(
+            &mut state,
+            EditCommand::ApplyCaptionTranslations { changes },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(result.action_name, "Translate Captions");
+        for (before, after) in captions.iter().zip(&state.timeline.tracks[0].clips) {
+            assert_eq!(after.id, before.id);
+            assert_eq!(after.start_frame, before.start_frame);
+            assert_eq!(after.duration_frames, before.duration_frames);
+            assert_eq!(after.caption_group_id, before.caption_group_id);
+            assert_eq!(
+                after
+                    .caption_translation_input
+                    .as_ref()
+                    .unwrap()
+                    .source_text,
+                before.text_content.clone().unwrap()
+            );
+        }
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert_eq!(state.timeline.tracks[0].clips, captions);
+    }
+
+    #[test]
+    fn caption_translation_stale_batch_is_atomic_and_manual_edit_clears_provenance() {
+        let mut state = state_with_video_and_audio();
+        let ids = SeqIdGen::new("cap-");
+        apply(
+            &mut state,
+            EditCommand::AddCaptions {
+                entries: vec![caption("One", 0, 10, "g"), caption("Two", 10, 10, "g")],
+            },
+            &ids,
+        )
+        .unwrap();
+        let before = state.timeline.clone();
+        let caption_ids: Vec<_> = state.timeline.tracks[0]
+            .clips
+            .iter()
+            .map(|clip| clip.id.clone())
+            .collect();
+        let change = |clip_id: String, source: &str, translated: &str| CaptionTranslationChange {
+            clip_id,
+            expected_source_text: source.into(),
+            translated_text: translated.into(),
+            input: CaptionTranslationInput {
+                source_text: source.into(),
+                source_locale: "en".into(),
+                target_locale: "fr".into(),
+                provider: "mock".into(),
+                model: "mock-v1".into(),
+            },
+        };
+        assert!(apply(
+            &mut state,
+            EditCommand::ApplyCaptionTranslations {
+                changes: vec![
+                    change(caption_ids[0].clone(), "One", "Un"),
+                    change(caption_ids[1].clone(), "stale", "Deux"),
+                ],
+            },
+            &ids,
+        )
+        .is_err());
+        assert_eq!(state.timeline, before);
+
+        apply(
+            &mut state,
+            EditCommand::ApplyCaptionTranslations {
+                changes: vec![change(caption_ids[0].clone(), "One", "Un")],
+            },
+            &ids,
+        )
+        .unwrap();
+        apply(
+            &mut state,
+            EditCommand::SetClipProperties {
+                clip_ids: vec![caption_ids[0].clone()],
+                properties: Box::new(ClipProperties {
+                    text_content: Some("Edited".into()),
+                    ..ClipProperties::default()
+                }),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert!(state.timeline.tracks[0].clips[0]
+            .caption_translation_input
+            .is_none());
+    }
+}
+
+#[cfg(test)]
+mod script_assembly_command_tests {
+    use super::*;
+    use crate::id::SeqIdGen;
+    use opentake_domain::{MediaSource, ScriptAssemblySegment};
+
+    fn media(id: &str, kind: ClipType, duration: f64, has_audio: bool) -> MediaManifestEntry {
+        MediaManifestEntry {
+            id: id.into(),
+            name: id.into(),
+            kind,
+            source: MediaSource::Project {
+                relative_path: format!("media/{id}"),
+            },
+            duration,
+            generation_input: None,
+            source_width: None,
+            source_height: None,
+            source_fps: None,
+            has_audio: Some(has_audio),
+            color: None,
+            proxy: None,
+            folder_id: None,
+            cached_remote_url: None,
+            cached_remote_url_expires_at: None,
+        }
+    }
+
+    fn plan() -> ScriptAssemblyPlan {
+        ScriptAssemblyPlan {
+            id: "script-plan-test".into(),
+            plan_hash: "a".repeat(64),
+            planner: "test-planner".into(),
+            planner_version: 1,
+            start_frame: 0,
+            segments: (0..3)
+                .map(|index| ScriptAssemblySegment {
+                    script: format!("Scene {}", index + 1),
+                    media_ref: format!("visual-{index}"),
+                    narration_media_ref: Some(format!("voice-{index}")),
+                    duration_frames: 30,
+                    transition: (index < 2).then_some(TransitionKind::CrossDissolve),
+                })
+                .collect(),
+        }
+    }
+
+    fn state() -> EditorState {
+        let mut state = EditorState::default();
+        state.timeline.settings_configured = true;
+        for index in 0..3 {
+            state.manifest.entries.push(media(
+                &format!("visual-{index}"),
+                ClipType::Image,
+                0.0,
+                false,
+            ));
+            state.manifest.entries.push(media(
+                &format!("voice-{index}"),
+                ClipType::Audio,
+                1.0,
+                true,
+            ));
+        }
+        state
+    }
+
+    #[test]
+    fn reviewed_three_segment_plan_applies_tracks_sync_transitions_and_one_undo() {
+        let mut state = state();
+        let ids = SeqIdGen::new("script-");
+        apply(
+            &mut state,
+            EditCommand::SaveScriptAssemblyPlan { plan: plan() },
+            &ids,
+        )
+        .unwrap();
+        assert!(state.timeline.tracks.is_empty());
+        assert_eq!(state.timeline.script_assembly_plans, vec![plan()]);
+        let undo_depth_before_apply = state.undo_depth();
+        let result = apply(
+            &mut state,
+            EditCommand::ApplyScriptAssemblyPlan {
+                plan_id: "script-plan-test".into(),
+            },
+            &ids,
+        )
+        .unwrap();
+        assert_eq!(result.action_name, "Build Script Video");
+        assert_eq!(state.undo_depth(), undo_depth_before_apply + 1);
+        assert_eq!(state.timeline.tracks.len(), 2);
+        let visual = &state.timeline.tracks[0];
+        let narration = &state.timeline.tracks[1];
+        assert_eq!(visual.kind, ClipType::Video);
+        assert_eq!(narration.kind, ClipType::Audio);
+        assert_eq!(visual.clips.len(), 3);
+        assert_eq!(narration.clips.len(), 3);
+        for index in 0..3 {
+            assert_eq!(visual.clips[index].start_frame, index as i32 * 30);
+            assert_eq!(narration.clips[index].start_frame, index as i32 * 30);
+            assert_eq!(visual.clips[index].duration_frames, 30);
+            assert_eq!(narration.clips[index].duration_frames, 30);
+            assert_eq!(visual.clips[index].volume, 0.0);
+        }
+        for index in 0..2 {
+            let transition = visual.clips[index].transition_out.as_ref().unwrap();
+            assert_eq!(transition.from_clip_id, visual.clips[index].id);
+            assert_eq!(transition.to_clip_id, visual.clips[index + 1].id);
+            assert_eq!(transition.kind, TransitionKind::CrossDissolve);
+            assert_eq!(transition.duration_frames, 12);
+        }
+        assert!(visual.clips[2].transition_out.is_none());
+
+        apply(&mut state, EditCommand::Undo, &ids).unwrap();
+        assert!(state.timeline.tracks.is_empty());
+        assert_eq!(state.timeline.script_assembly_plans, vec![plan()]);
+    }
+
+    #[test]
+    fn missing_media_refuses_atomically_and_narration_must_match_within_one_frame() {
+        let mut state = state();
+        let ids = SeqIdGen::new("script-");
+        let mut invalid = plan();
+        invalid.id = "missing-plan".into();
+        invalid.segments[1].media_ref = "missing".into();
+        apply(
+            &mut state,
+            EditCommand::SaveScriptAssemblyPlan {
+                plan: invalid.clone(),
+            },
+            &ids,
+        )
+        .unwrap();
+        let before = state.timeline.clone();
+        assert!(apply(
+            &mut state,
+            EditCommand::ApplyScriptAssemblyPlan {
+                plan_id: invalid.id,
+            },
+            &ids,
+        )
+        .is_err());
+        assert_eq!(state.timeline, before);
+
+        let mut mismatch = plan();
+        mismatch.id = "mismatch-plan".into();
+        state
+            .manifest
+            .entries
+            .iter_mut()
+            .find(|entry| entry.id == "voice-0")
+            .unwrap()
+            .duration = 2.0;
+        apply(
+            &mut state,
+            EditCommand::SaveScriptAssemblyPlan {
+                plan: mismatch.clone(),
+            },
+            &ids,
+        )
+        .unwrap();
+        let before = state.timeline.clone();
+        assert!(apply(
+            &mut state,
+            EditCommand::ApplyScriptAssemblyPlan {
+                plan_id: mismatch.id,
+            },
+            &ids,
+        )
+        .is_err());
+        assert_eq!(state.timeline, before);
+    }
 }
 
 /// Tests for [`EditCommand::AddTextsAutoTrack`] (#194): the all-omitted-
diff --git a/crates/opentake-ops/src/editor_state.rs b/crates/opentake-ops/src/editor_state.rs
index f6693160..6af47d67 100644
--- a/crates/opentake-ops/src/editor_state.rs
+++ b/crates/opentake-ops/src/editor_state.rs
@@ -97,32 +97,48 @@ impl EditorState {
         self.version += 1;
     }
 
+    /// Commit an irreversible audit mutation without adding an undo entry.
+    /// Earlier undo snapshots are retained, but restore paths keep provider
+    /// voice records outside ordinary document undo/redo.
+    pub(crate) fn commit_irreversible(&mut self) {
+        self.redo_stack.clear();
+        self.version += 1;
+    }
+
     /// Undo the most recent committed change. Returns `true` if anything was
     /// undone. Pushes the pre-undo document onto the redo stack and bumps the
     /// version.
     pub(crate) fn undo(&mut self) -> bool {
-        let Some(prev) = self.undo_stack.pop() else {
-            return false;
-        };
         let current = self.snapshot();
-        self.restore(prev);
-        self.redo_stack.push(current);
-        self.version += 1;
-        true
+        while let Some(mut prev) = self.undo_stack.pop() {
+            preserve_voice_models(&mut prev, &current);
+            if prev == current {
+                continue;
+            }
+            self.restore(prev);
+            self.redo_stack.push(current);
+            self.version += 1;
+            return true;
+        }
+        false
     }
 
     /// Redo the most recently undone change. Returns `true` if anything was
     /// redone. Pushes the pre-redo document onto the undo stack and bumps the
     /// version.
     pub(crate) fn redo(&mut self) -> bool {
-        let Some(next) = self.redo_stack.pop() else {
-            return false;
-        };
         let current = self.snapshot();
-        self.restore(next);
-        self.undo_stack.push(current);
-        self.version += 1;
-        true
+        while let Some(mut next) = self.redo_stack.pop() {
+            preserve_voice_models(&mut next, &current);
+            if next == current {
+                continue;
+            }
+            self.restore(next);
+            self.undo_stack.push(current);
+            self.version += 1;
+            return true;
+        }
+        false
     }
 
     // MARK: - Lookups (1:1 port of EditorViewModel.findClip)
@@ -143,10 +159,14 @@ impl EditorState {
     }
 }
 
+fn preserve_voice_models(target: &mut DocSnapshot, current: &DocSnapshot) {
+    target.timeline.voice_models = current.timeline.voice_models.clone();
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
-    use opentake_domain::{Clip, ClipType, Track};
+    use opentake_domain::{Clip, ClipType, Track, VoiceModelRecord};
 
     fn state_with_clip() -> EditorState {
         let mut tl = Timeline::new();
@@ -194,6 +214,61 @@ mod tests {
         assert_eq!(s.version(), 3);
     }
 
+    #[test]
+    fn permanent_voice_revocation_survives_all_undo_snapshots() {
+        let mut state = EditorState::default();
+        let before_enroll = state.snapshot();
+        state.timeline.voice_models.push(VoiceModelRecord {
+            id: "voice-1".into(),
+            provider: "elevenlabs".into(),
+            provider_voice_id: "provider-1".into(),
+            model: "model".into(),
+            consent_id: "consent-1".into(),
+            source_audio_asset_id: "audio-1".into(),
+            source_audio_sha256: "a".repeat(64),
+            request_hash: "b".repeat(64),
+            voice_name: "Narrator".into(),
+            revoked: false,
+        });
+        state.commit(before_enroll);
+        state.timeline.voice_models[0].revoked = true;
+        state.commit_irreversible();
+
+        let version = state.version();
+        assert!(!state.undo());
+        assert_eq!(state.timeline.voice_models.len(), 1);
+        assert!(state.timeline.voice_models[0].revoked);
+        assert!(!state.can_undo());
+        assert!(!state.redo());
+        assert_eq!(state.version(), version);
+    }
+
+    #[test]
+    fn active_provider_voice_survives_undo_of_an_earlier_edit() {
+        let mut state = state_with_clip();
+        let before_edit = state.snapshot();
+        state.timeline.tracks[0].clips[0].start_frame = 12;
+        state.commit(before_edit);
+        state.timeline.voice_models.push(VoiceModelRecord {
+            id: "voice-1".into(),
+            provider: "elevenlabs".into(),
+            provider_voice_id: "provider-1".into(),
+            model: "model".into(),
+            consent_id: "consent-1".into(),
+            source_audio_asset_id: "audio-1".into(),
+            source_audio_sha256: "a".repeat(64),
+            request_hash: "b".repeat(64),
+            voice_name: "Narrator".into(),
+            revoked: false,
+        });
+        state.commit_irreversible();
+
+        assert!(state.undo());
+        assert_eq!(state.timeline.tracks[0].clips[0].start_frame, 0);
+        assert_eq!(state.timeline.voice_models.len(), 1);
+        assert!(!state.timeline.voice_models[0].revoked);
+    }
+
     #[test]
     fn new_edit_clears_redo_stack() {
         let mut s = state_with_clip();
diff --git a/crates/opentake-ops/src/intent.rs b/crates/opentake-ops/src/intent.rs
index b88d426a..f8b95899 100644
--- a/crates/opentake-ops/src/intent.rs
+++ b/crates/opentake-ops/src/intent.rs
@@ -276,7 +276,10 @@ fn validate_intent_entry(
                 "entries[{index}]: track index {track_index} out of range"
             )));
         };
-        if !entry.source_clip_type.is_compatible(track.kind) {
+        // A placed audio lane can come from a video asset (linked audio), so
+        // track compatibility follows the placed media type rather than the
+        // source container type.
+        if !entry.media_type.is_compatible(track.kind) {
             return Err(EditError::Invalid(format!(
                 "entries[{index}]: asset type is not compatible with the destination track"
             )));
diff --git a/crates/opentake-ops/src/lib.rs b/crates/opentake-ops/src/lib.rs
index 6c286947..baf872b0 100644
--- a/crates/opentake-ops/src/lib.rs
+++ b/crates/opentake-ops/src/lib.rs
@@ -31,8 +31,9 @@ pub use engines::{
 
 // --- Command layer ---
 pub use command::{
-    apply, CaptionEntry, ClipEntry, ClipProperties, EditCommand, EditError, EditResult,
-    KeyframePayload, KeyframeProperty, KeyframeValue, RenameEntry, TextAutoTrackEntry, TextEntry,
+    apply, CaptionEntry, CaptionTranslationChange, ClipEntry, ClipProperties, EditCommand,
+    EditError, EditResult, KeyframePayload, KeyframeProperty, KeyframeValue, RenameEntry,
+    TextAutoTrackEntry, TextEntry,
 };
 pub use editor_state::{DocSnapshot, EditorState};
 pub use id::{IdGen, SeqIdGen};
diff --git a/crates/opentake-ops/src/ops/clear_region.rs b/crates/opentake-ops/src/ops/clear_region.rs
index 77590901..1f4e348e 100644
--- a/crates/opentake-ops/src/ops/clear_region.rs
+++ b/crates/opentake-ops/src/ops/clear_region.rs
@@ -49,6 +49,7 @@ pub fn clear_region(
                     let new_trim_end = clip.trim_end_frame + source_delta;
                     let c = &mut timeline.tracks[ti].clips[ci];
                     c.trim_end_frame = new_trim_end;
+                    c.loudness_normalization = None;
                     c.set_duration(new_duration);
                 }
             }
@@ -63,6 +64,7 @@ pub fn clear_region(
                     let c = &mut timeline.tracks[ti].clips[ci];
                     c.start_frame = new_start_frame;
                     c.trim_start_frame = new_trim_start;
+                    c.loudness_normalization = None;
                     c.set_duration(new_duration);
                 }
             }
@@ -71,13 +73,17 @@ pub fn clear_region(
                 if find(timeline, &clip_id).is_some() {
                     // Split at `start`; the right half is what now covers the region.
                     split_clip(timeline, &clip_id, start, ids);
-                    // Locate the freshly created right half (starts at `start`, not the original id).
-                    let right = timeline
-                        .tracks
-                        .iter()
-                        .flat_map(|t| &t.clips)
-                        .find(|c| c.start_frame == start && c.id != clip_id)
-                        .map(|c| (c.id.clone(), c.end_frame()));
+                    // Locate the freshly created right half on the original
+                    // clip's track. Linked splits mint a right half on every
+                    // partner track; a global search can select the wrong
+                    // partner and leave a duplicate middle fragment behind.
+                    let right = find(timeline, &clip_id).and_then(|(ti, _)| {
+                        timeline.tracks[ti]
+                            .clips
+                            .iter()
+                            .find(|c| c.start_frame == start && c.id != clip_id)
+                            .map(|c| (c.id.clone(), c.end_frame()))
+                    });
                     if let Some((right_id, right_end)) = right {
                         if right_end > end {
                             // Right half overruns the region — split again at `end`,
diff --git a/crates/opentake-ops/src/ops/duplicate.rs b/crates/opentake-ops/src/ops/duplicate.rs
index 9097a5b6..b984768c 100644
--- a/crates/opentake-ops/src/ops/duplicate.rs
+++ b/crates/opentake-ops/src/ops/duplicate.rs
@@ -338,8 +338,9 @@ mod tests {
             },
             feather: 0.05,
             invert: false,
+            ..Mask::default()
         }];
-        src.effects = vec![Effect::new("gaussianBlur").with_param("radius", 4.0)];
+        src.effects = vec![Effect::new("grayscale").with_param("amount", 0.4)];
         let orig_color_grade = src.color_grade;
         let orig_chroma_key = src.chroma_key;
         let g = SeqIdGen::default();
diff --git a/crates/opentake-ops/src/ops/folders.rs b/crates/opentake-ops/src/ops/folders.rs
index 42d6dcce..87615c7a 100644
--- a/crates/opentake-ops/src/ops/folders.rs
+++ b/crates/opentake-ops/src/ops/folders.rs
@@ -131,9 +131,15 @@ pub fn delete_folder(
     (folders_removed, assets_removed, clips_removed)
 }
 
-/// Remove every clip whose `media_ref` is in `asset_ids`, then prune any tracks
-/// left empty (mirroring `remove_clips`). Returns the count of clips removed.
+/// Remove every clip whose `media_ref` is in `asset_ids` from the root and all
+/// registered nested timelines, then prune tracks left empty (mirroring
+/// `remove_clips`). Returns the total count of clips removed across the graph.
 fn cascade_remove_clips(timeline: &mut Timeline, asset_ids: &HashSet<String>) -> usize {
+    let nested_count = timeline
+        .nested_sequences
+        .iter_mut()
+        .map(|sequence| cascade_remove_clips(&mut sequence.timeline, asset_ids))
+        .sum::<usize>();
     let doomed: Vec<String> = timeline
         .tracks
         .iter()
@@ -148,7 +154,7 @@ fn cascade_remove_clips(timeline: &mut Timeline, asset_ids: &HashSet<String>) ->
     if count > 0 {
         crate::ops::prune_empty_tracks(timeline);
     }
-    count
+    nested_count + count
 }
 
 /// Expand a set of root folder ids to include all transitive descendant folders
@@ -192,6 +198,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -311,6 +319,40 @@ mod tests {
         assert_eq!(tl.tracks[0].clips[0].id, "clip-2");
     }
 
+    #[test]
+    fn delete_media_cascades_through_nested_timelines() {
+        use opentake_domain::{Clip, NestedSequence, Track};
+
+        let mut m = MediaManifest::new();
+        m.entries.push(entry("a"));
+        m.entries.push(entry("b"));
+
+        let mut child = timeline_with_clip("nested-a", "a");
+        child.tracks[0]
+            .clips
+            .push(Clip::new("nested-b", "b", 40, 30));
+        let mut root = Timeline::new();
+        let mut root_track = Track::new("root-track", ClipType::Video);
+        root_track
+            .clips
+            .push(Clip::new_nested("compound", "sequence", 0, 70));
+        root.tracks.push(root_track);
+        root.nested_sequences
+            .push(NestedSequence::new("sequence", "Nested", child));
+
+        let (assets, clips) =
+            delete_media(&mut root, &mut m, &["a".to_string()].into_iter().collect());
+
+        assert_eq!(assets, 1);
+        assert_eq!(clips, 1);
+        assert_eq!(root.nested_sequences[0].timeline.tracks.len(), 1);
+        assert_eq!(
+            root.nested_sequences[0].timeline.tracks[0].clips[0].id,
+            "nested-b"
+        );
+        assert_eq!(root.tracks[0].clips[0].id, "compound");
+    }
+
     #[test]
     fn delete_folder_recurses_and_cascades() {
         let mut m = MediaManifest::new();
diff --git a/crates/opentake-ops/src/ops/ripple.rs b/crates/opentake-ops/src/ops/ripple.rs
index 8e6b7629..b758328d 100644
--- a/crates/opentake-ops/src/ops/ripple.rs
+++ b/crates/opentake-ops/src/ops/ripple.rs
@@ -488,6 +488,71 @@ mod tests {
         }
     }
 
+    #[test]
+    fn ripple_delete_ranges_keeps_linked_av_frame_exact() {
+        let mut tl = Timeline::new();
+        let mut video = Track::new("video", ClipType::Video);
+        let mut video_clip = clip("video-clip", 0, 900);
+        video_clip.link_group_id = Some("av".into());
+        video.clips.push(video_clip);
+        let mut audio = Track::new("audio", ClipType::Audio);
+        let mut audio_clip = clip("audio-clip", 0, 900);
+        audio_clip.media_type = ClipType::Audio;
+        audio_clip.link_group_id = Some("av".into());
+        audio.clips.push(audio_clip);
+        tl.tracks.extend([video, audio]);
+
+        let g = SeqIdGen::new("r-");
+        let out = ripple_delete_ranges_on_track(&mut tl, 1, &[FrameRange::new(6, 12)], &label, &g);
+        assert!(matches!(out, RippleOutcome::Ok(_)));
+        let spans = |track: &Track| {
+            track
+                .clips
+                .iter()
+                .map(|clip| (clip.start_frame, clip.end_frame()))
+                .collect::<Vec<_>>()
+        };
+        assert_eq!(spans(&tl.tracks[0]), vec![(0, 6), (6, 894)]);
+        assert_eq!(spans(&tl.tracks[1]), vec![(0, 6), (6, 894)]);
+    }
+
+    #[test]
+    fn ripple_delete_multiple_ranges_with_sync_locked_captions_is_atomic() {
+        let mut tl = Timeline::new();
+        let mut captions = Track::new("captions", ClipType::Video);
+        captions.sync_locked = true;
+        captions.clips.extend([
+            clip("caption-1", 0, 86),
+            clip("caption-2", 146, 116),
+            clip("caption-3", 350, 21),
+            clip("caption-4", 371, 57),
+            clip("caption-5", 428, 82),
+        ]);
+        let mut video = Track::new("video", ClipType::Video);
+        let mut video_clip = clip("video-clip", 0, 900);
+        video_clip.link_group_id = Some("av".into());
+        video.clips.push(video_clip);
+        let mut audio = Track::new("audio", ClipType::Audio);
+        let mut audio_clip = clip("audio-clip", 0, 900);
+        audio_clip.media_type = ClipType::Audio;
+        audio_clip.link_group_id = Some("av".into());
+        audio.clips.push(audio_clip);
+        tl.tracks.extend([captions, video, audio]);
+        let before = tl.clone();
+
+        let g = SeqIdGen::new("r-");
+        let out = ripple_delete_ranges_on_track(
+            &mut tl,
+            2,
+            &[FrameRange::new(151, 154), FrameRange::new(358, 365)],
+            &label,
+            &g,
+        );
+
+        assert!(matches!(out, RippleOutcome::Refused(_)));
+        assert_eq!(tl, before, "a follower collision must be side-effect free");
+    }
+
     #[test]
     fn ripple_delete_ranges_refuses_on_locked_follower_collision() {
         let mut tl = Timeline::new();
diff --git a/crates/opentake-ops/src/ops/settings.rs b/crates/opentake-ops/src/ops/settings.rs
index 9e35fa7b..094c74b3 100644
--- a/crates/opentake-ops/src/ops/settings.rs
+++ b/crates/opentake-ops/src/ops/settings.rs
@@ -33,13 +33,21 @@ pub fn set_timeline_settings(timeline: &mut Timeline, fps: i32, width: i32, heig
         return false;
     }
 
+    // Nested timelines share one project timebase and output canvas. Keep every
+    // stored child synchronized (including frame/keyframe rescaling) so entering
+    // a compound never exposes stale settings after the root changes.
+    let mut nested_changed = false;
+    for sequence in &mut timeline.nested_sequences {
+        nested_changed |= set_timeline_settings(&mut sequence.timeline, fps, width, height);
+    }
+
     let prev_fps = timeline.fps;
     let prev_width = timeline.width;
     let prev_height = timeline.height;
     let prev_configured = timeline.settings_configured;
 
     if fps == prev_fps && width == prev_width && height == prev_height && prev_configured {
-        return false;
+        return nested_changed;
     }
 
     // Rescale all frame-based values when FPS changes (upstream :26-52).
@@ -62,6 +70,10 @@ pub fn set_timeline_settings(timeline: &mut Timeline, fps: i32, width: i32, heig
                 clip.rescale_keyframes(scale);
                 clip.fade_in_frames = round_scale(clip.fade_in_frames, scale);
                 clip.fade_out_frames = round_scale(clip.fade_out_frames, scale);
+                if let Some(transition) = &mut clip.transition_out {
+                    transition.duration_frames =
+                        round_scale(transition.duration_frames, scale).max(1);
+                }
                 clip.clamp_keyframes_to_duration();
                 clip.clamp_fades_to_duration();
                 previous_end = Some(clip.end_frame());
@@ -85,7 +97,9 @@ fn round_scale(value: i32, scale: f64) -> i32 {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use opentake_domain::{Clip, ClipType, Keyframe, KeyframeTrack, Track};
+    use opentake_domain::{
+        Clip, ClipType, Keyframe, KeyframeTrack, Track, Transition, TransitionKind,
+    };
 
     fn track(id: &str, kind: ClipType, clips: Vec<Clip>) -> Track {
         let mut track = Track::new(id, kind);
@@ -117,6 +131,29 @@ mod tests {
         assert_eq!((c.start_frame, c.duration_frames), (10, 40));
     }
 
+    #[test]
+    fn settings_change_rescales_registered_nested_timelines() {
+        use opentake_domain::NestedSequence;
+
+        let mut child = Timeline::new();
+        child.tracks.push(track(
+            "child",
+            ClipType::Video,
+            vec![clip("nested", 15, 30)],
+        ));
+        let mut root = Timeline::new();
+        root.nested_sequences
+            .push(NestedSequence::new("sequence", "Scene", child));
+
+        assert!(set_timeline_settings(&mut root, 60, 1280, 720));
+
+        let child = &root.nested_sequences[0].timeline;
+        assert_eq!((child.fps, child.width, child.height), (60, 1280, 720));
+        assert!(child.settings_configured);
+        assert_eq!(child.tracks[0].clips[0].start_frame, 30);
+        assert_eq!(child.tracks[0].clips[0].duration_frames, 60);
+    }
+
     #[test]
     fn fps_doubling_scales_clip_start_and_duration() {
         let mut tl = Timeline::new();
@@ -147,6 +184,29 @@ mod tests {
         assert_eq!(c.fade_out_frames, 24);
     }
 
+    #[test]
+    fn fps_change_scales_transition_duration() {
+        let mut tl = Timeline::new();
+        let mut a = clip("a", 0, 60);
+        a.transition_out = Some(Transition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: TransitionKind::CrossDissolve,
+            duration_frames: 15,
+        });
+        tl.tracks
+            .push(track("v", ClipType::Video, vec![a, clip("b", 60, 60)]));
+        assert!(set_timeline_settings(&mut tl, 60, 1920, 1080));
+        assert_eq!(
+            tl.tracks[0].clips[0]
+                .transition_out
+                .as_ref()
+                .unwrap()
+                .duration_frames,
+            30
+        );
+    }
+
     #[test]
     fn fps_change_rescales_keyframe_offsets() {
         let mut tl = Timeline::new();
diff --git a/crates/opentake-ops/src/ops/trim.rs b/crates/opentake-ops/src/ops/trim.rs
index e5d90f3d..2bea5f5d 100644
--- a/crates/opentake-ops/src/ops/trim.rs
+++ b/crates/opentake-ops/src/ops/trim.rs
@@ -48,6 +48,7 @@ pub fn trim_clip_internal(
     let c = &mut timeline.tracks[ti].clips[ci];
     c.trim_start_frame = trim_start_frame;
     c.trim_end_frame = trim_end_frame;
+    c.loudness_normalization = None;
     c.start_frame = new_start_frame;
     c.set_duration(new_duration);
 
diff --git a/crates/opentake-ops/tests/command_apply.rs b/crates/opentake-ops/tests/command_apply.rs
index d0ac67e9..d968dd56 100644
--- a/crates/opentake-ops/tests/command_apply.rs
+++ b/crates/opentake-ops/tests/command_apply.rs
@@ -3,8 +3,11 @@
 //! resulting `Timeline` / `MediaManifest`, undo/redo behavior, versioning, and
 //! the refusal path — the behaviors the port must match upstream.
 
-use opentake_domain::{AnimPair, Interpolation, Keyframe, KeyframeTrack};
-use opentake_domain::{ChromaKey, ColorGrade, Effect, Mask, MaskShape, Point2};
+use opentake_domain::{AnimPair, Interpolation, Keyframe, KeyframeTrack, TransitionKind};
+use opentake_domain::{
+    ChromaKey, ColorGrade, Effect, HslSecondary, LiftGammaGain, LutReference, Mask, MaskShape,
+    Point2, Rgb,
+};
 use opentake_domain::{
     Clip, ClipType, MediaManifest, MediaManifestEntry, MediaSource, Timeline, Track, Transform,
 };
@@ -55,6 +58,463 @@ fn entry(track_index: usize, media_type: ClipType, start: i32, dur: i32) -> Clip
     }
 }
 
+#[test]
+fn compound_create_edit_move_trim_duplicate_dissolve_and_undo_share_one_command_path() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track(
+        "child-track",
+        true,
+        vec![Clip::new("child", "asset-child", 5, 20)],
+    )];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+
+    let created = apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene A".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 100,
+            duration_frames: 30,
+        },
+        &ids,
+    )
+    .unwrap();
+    let compound_id = created.affected_clip_ids[0].clone();
+    assert_eq!(st.timeline.nested_sequences.len(), 1);
+    assert_eq!(st.undo_depth(), 1);
+
+    let sequence_id = st.timeline.nested_sequences[0].id.clone();
+    let mut edited = st.timeline.nested_sequences[0].timeline.clone();
+    edited.tracks[0].clips[0].media_ref = "asset-edited".into();
+    apply(
+        &mut st,
+        EditCommand::SetNestedSequenceTimeline {
+            sequence_id: sequence_id.clone(),
+            timeline: edited,
+        },
+        &ids,
+    )
+    .unwrap();
+    apply(
+        &mut st,
+        EditCommand::RenameNestedSequence {
+            sequence_id,
+            name: "Edited scene".into(),
+        },
+        &ids,
+    )
+    .unwrap();
+    apply(
+        &mut st,
+        EditCommand::MoveClips {
+            moves: vec![ClipMove {
+                clip_id: compound_id.clone(),
+                to_track: 0,
+                to_frame: 110,
+            }],
+        },
+        &ids,
+    )
+    .unwrap();
+    apply(
+        &mut st,
+        EditCommand::TrimClips {
+            edits: vec![(compound_id.clone(), 5, 0)],
+        },
+        &ids,
+    )
+    .unwrap();
+    let duplicate = apply(
+        &mut st,
+        EditCommand::DuplicateClips {
+            clip_ids: vec![compound_id.clone()],
+            offset_frames: 40,
+            target_track_indexes: vec![0],
+        },
+        &ids,
+    )
+    .unwrap();
+    assert_eq!(duplicate.affected_clip_ids.len(), 1);
+
+    let before_dissolve = st.timeline.clone();
+    let dissolved = apply(
+        &mut st,
+        EditCommand::DissolveNestedSequence {
+            clip_id: compound_id.clone(),
+        },
+        &ids,
+    )
+    .unwrap();
+    assert_eq!(dissolved.affected_clip_ids.len(), 1);
+    let leaf = st
+        .timeline
+        .tracks
+        .iter()
+        .flat_map(|track| &track.clips)
+        .find(|clip| dissolved.affected_clip_ids.contains(&clip.id))
+        .unwrap();
+    assert_eq!(leaf.media_ref, "asset-edited");
+    assert_eq!(leaf.start_frame, 115);
+    assert_eq!(leaf.duration_frames, 20);
+    assert_eq!(leaf.trim_start_frame, 0);
+
+    apply(&mut st, EditCommand::Undo, &ids).unwrap();
+    assert_eq!(st.timeline, before_dissolve);
+}
+
+#[test]
+fn dissolve_refuses_parent_edits_without_changing_history() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track(
+        "child-track",
+        true,
+        vec![Clip::new("child", "asset-child", 0, 20)],
+    )];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    let created = apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 20,
+        },
+        &ids,
+    )
+    .unwrap();
+    let compound_id = created.affected_clip_ids[0].clone();
+    apply(
+        &mut st,
+        EditCommand::SetClipProperties {
+            clip_ids: vec![compound_id.clone()],
+            properties: Box::new(ClipProperties {
+                opacity: Some(0.5),
+                ..ClipProperties::default()
+            }),
+        },
+        &ids,
+    )
+    .unwrap();
+    let before = st.timeline.clone();
+    let undo_depth = st.undo_depth();
+    let version = st.version();
+
+    let error = apply(
+        &mut st,
+        EditCommand::DissolveNestedSequence {
+            clip_id: compound_id,
+        },
+        &ids,
+    )
+    .unwrap_err();
+
+    assert!(error
+        .to_string()
+        .contains("parent-level edits must be normalized"));
+    assert_eq!(st.timeline, before);
+    assert_eq!(st.undo_depth(), undo_depth);
+    assert_eq!(st.version(), version);
+}
+
+#[test]
+fn compound_edit_refuses_properties_that_cannot_render() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track(
+        "child-track",
+        true,
+        vec![Clip::new("child", "asset-child", 0, 20)],
+    )];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    let created = apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 20,
+        },
+        &ids,
+    )
+    .unwrap();
+    let compound_id = created.affected_clip_ids[0].clone();
+    let before = st.timeline.clone();
+    let undo_depth = st.undo_depth();
+
+    let error = apply(
+        &mut st,
+        EditCommand::SetClipProperties {
+            clip_ids: vec![compound_id.clone()],
+            properties: Box::new(ClipProperties {
+                speed: Some(2.0),
+                ..ClipProperties::default()
+            }),
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(error.to_string().contains("does not support retime"));
+    assert_eq!(st.timeline, before);
+    assert_eq!(st.undo_depth(), undo_depth);
+
+    let error = apply(
+        &mut st,
+        EditCommand::SetColorGrade {
+            clip_ids: vec![compound_id],
+            grade: Some(ColorGrade::default()),
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(error.to_string().contains("direct pixel effects"));
+    assert_eq!(st.timeline, before);
+    assert_eq!(st.undo_depth(), undo_depth);
+}
+
+#[test]
+fn compound_creation_expands_linked_partners_and_refuses_unselected_overlap() {
+    let mut video = Clip::new("video", "video-asset", 0, 10);
+    video.link_group_id = Some("av".into());
+    let blocker = Clip::new("blocker", "blocker-asset", 15, 5);
+    let later = Clip::new("later", "later-asset", 20, 10);
+    let mut audio = Clip::new("audio", "audio-asset", 0, 10);
+    audio.media_type = ClipType::Audio;
+    audio.source_clip_type = ClipType::Audio;
+    audio.link_group_id = Some("av".into());
+    let mut st = state(vec![
+        video_track("v1", true, vec![video, blocker]),
+        video_track("v2", true, vec![later]),
+        audio_track("a1", true, vec![audio]),
+    ]);
+    let ids = SeqIdGen::new("nested-");
+    let before = st.timeline.clone();
+
+    let error = apply(
+        &mut st,
+        EditCommand::CreateNestedSequenceFromClips {
+            name: "Blocked".into(),
+            clip_ids: vec!["video".into(), "later".into()],
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(error.to_string().contains("overlaps an unselected clip"));
+    assert_eq!(st.timeline, before);
+
+    apply(
+        &mut st,
+        EditCommand::CreateNestedSequenceFromClips {
+            name: "Linked".into(),
+            clip_ids: vec!["video".into()],
+        },
+        &ids,
+    )
+    .unwrap();
+    let child_clips = st.timeline.nested_sequences[0]
+        .timeline
+        .tracks
+        .iter()
+        .flat_map(|track| &track.clips)
+        .collect::<Vec<_>>();
+    assert_eq!(child_clips.len(), 2);
+    assert!(child_clips.iter().any(|clip| clip.id == "video"));
+    assert!(child_clips.iter().any(|clip| clip.id == "audio"));
+}
+
+#[test]
+fn dissolve_remaps_link_groups_and_transition_targets() {
+    let mut first = Clip::new("first", "first-asset", 0, 10);
+    first.link_group_id = Some("av".into());
+    first.transition_out = Some(opentake_domain::Transition {
+        from_clip_id: "first".into(),
+        to_clip_id: "second".into(),
+        kind: TransitionKind::CrossDissolve,
+        duration_frames: 3,
+    });
+    let second = Clip::new("second", "second-asset", 10, 10);
+    let mut audio = Clip::new("audio", "audio-asset", 0, 10);
+    audio.media_type = ClipType::Audio;
+    audio.source_clip_type = ClipType::Audio;
+    audio.link_group_id = Some("av".into());
+    let mut child = Timeline::new();
+    child.tracks = vec![
+        video_track("child-video", true, vec![first, second]),
+        audio_track("child-audio", true, vec![audio]),
+    ];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    let created = apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 20,
+        },
+        &ids,
+    )
+    .unwrap();
+    apply(
+        &mut st,
+        EditCommand::DissolveNestedSequence {
+            clip_id: created.affected_clip_ids[0].clone(),
+        },
+        &ids,
+    )
+    .unwrap();
+
+    let clips = st
+        .timeline
+        .tracks
+        .iter()
+        .flat_map(|track| &track.clips)
+        .collect::<Vec<_>>();
+    let first = clips
+        .iter()
+        .find(|clip| clip.media_ref == "first-asset")
+        .unwrap();
+    let second = clips
+        .iter()
+        .find(|clip| clip.media_ref == "second-asset")
+        .unwrap();
+    let audio = clips
+        .iter()
+        .find(|clip| clip.media_ref == "audio-asset")
+        .unwrap();
+    assert_eq!(first.transition_out.as_ref().unwrap().to_clip_id, second.id);
+    assert!(first.link_group_id.is_some());
+    assert_eq!(first.link_group_id, audio.link_group_id);
+    assert_ne!(first.link_group_id.as_deref(), Some("av"));
+}
+
+#[test]
+fn invalid_nested_edit_restores_document_and_history() {
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    let mut child = Timeline::new();
+    child.tracks.push(video_track(
+        "child-track",
+        true,
+        vec![Clip::new_nested("bad-ref", "missing", 0, 10)],
+    ));
+    let before = st.timeline.clone();
+    let error = apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Invalid".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 10,
+        },
+        &ids,
+    )
+    .unwrap_err();
+
+    assert!(error
+        .to_string()
+        .contains("missing nested sequence reference"));
+    assert_eq!(st.timeline, before);
+    assert_eq!(st.undo_depth(), 0);
+}
+
+#[test]
+fn nested_child_command_edits_in_place_and_root_undo_restores_it() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track(
+        "child-track",
+        true,
+        vec![Clip::new("child-a", "asset", 0, 20)],
+    )];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 20,
+        },
+        &ids,
+    )
+    .unwrap();
+    let sequence_id = st.timeline.nested_sequences[0].id.clone();
+    let before = st.timeline.clone();
+
+    let result = apply(
+        &mut st,
+        EditCommand::EditNestedSequence {
+            sequence_id,
+            command: Box::new(EditCommand::MoveClips {
+                moves: vec![ClipMove {
+                    clip_id: "child-a".into(),
+                    to_track: 0,
+                    to_frame: 7,
+                }],
+            }),
+        },
+        &ids,
+    )
+    .unwrap();
+    assert!(result.changed);
+    assert_eq!(
+        st.timeline.nested_sequences[0].timeline.tracks[0].clips[0].start_frame,
+        7
+    );
+
+    apply(&mut st, EditCommand::Undo, &ids).unwrap();
+    assert_eq!(st.timeline, before);
+}
+
+#[test]
+fn nested_child_refuses_root_scoped_commands() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track("child-track", true, vec![])];
+    let mut st = state(vec![video_track("root", true, vec![])]);
+    let ids = SeqIdGen::new("nested-");
+    apply(
+        &mut st,
+        EditCommand::CreateNestedSequence {
+            name: "Scene".into(),
+            timeline: child,
+            track_index: 0,
+            start_frame: 0,
+            duration_frames: 20,
+        },
+        &ids,
+    )
+    .unwrap();
+    let sequence_id = st.timeline.nested_sequences[0].id.clone();
+    let before_timeline = st.timeline.clone();
+    let before_manifest = st.manifest.clone();
+    let undo_depth = st.undo_depth();
+
+    let error = apply(
+        &mut st,
+        EditCommand::EditNestedSequence {
+            sequence_id,
+            command: Box::new(EditCommand::DeleteMedia {
+                asset_ids: vec!["asset".into()],
+            }),
+        },
+        &ids,
+    )
+    .unwrap_err();
+
+    assert!(error.to_string().contains("must target the root timeline"));
+    assert_eq!(st.timeline, before_timeline);
+    assert_eq!(st.manifest, before_manifest);
+    assert_eq!(st.undo_depth(), undo_depth);
+}
+
 // ---- add_clips + overwrite ------------------------------------------------
 
 #[test]
@@ -109,6 +569,23 @@ fn add_clips_applies_supplied_transform() {
     assert_eq!(placed.transform.height, 1.0);
 }
 
+#[test]
+fn add_clips_accepts_audio_lane_derived_from_video_asset() {
+    let mut st = state(vec![audio_track("a", true, vec![])]);
+    let g = SeqIdGen::new("n-");
+    let mut e = entry(0, ClipType::Audio, 15, 110);
+    e.source_clip_type = ClipType::Video;
+    e.trim_start_frame = Some(10);
+
+    apply(&mut st, EditCommand::AddClips { entries: vec![e] }, &g).unwrap();
+
+    let placed = &st.timeline.tracks[0].clips[0];
+    assert_eq!(placed.media_type, ClipType::Audio);
+    assert_eq!(placed.source_clip_type, ClipType::Video);
+    assert_eq!(placed.start_frame, 15);
+    assert_eq!(placed.trim_start_frame, 10);
+}
+
 #[test]
 fn add_clips_rejects_out_of_range_track() {
     let mut st = state(vec![video_track("v", true, vec![])]);
@@ -753,6 +1230,116 @@ fn set_clip_properties_multiple_fields_at_once() {
     assert!(c.opacity_track.is_none()); // opacity scalar cleared its track
 }
 
+#[test]
+fn set_transition_validates_pair_rejects_oversize_and_undoes() {
+    let mut st = state(vec![video_track(
+        "v",
+        true,
+        vec![clip("a", 0, 100), clip("b", 100, 40)],
+    )]);
+    let g = SeqIdGen::default();
+
+    let result = apply(
+        &mut st,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 20,
+        },
+        &g,
+    )
+    .unwrap();
+
+    assert!(result.changed);
+    assert_eq!(result.action_name, "Set Transition");
+    let transition = st.timeline.tracks[0].clips[0]
+        .transition_out
+        .as_ref()
+        .expect("transition stored on outgoing clip");
+    assert_eq!(transition.to_clip_id, "b");
+    assert_eq!(transition.from_clip_id, "a");
+    assert_eq!(transition.kind, TransitionKind::CrossDissolve);
+    assert_eq!(transition.duration_frames, 20);
+
+    apply(&mut st, EditCommand::Undo, &g).unwrap();
+    assert!(st.timeline.tracks[0].clips[0].transition_out.is_none());
+
+    let error = apply(
+        &mut st,
+        EditCommand::SetTransition {
+            from_clip_id: "b".into(),
+            to_clip_id: "a".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 10,
+        },
+        &g,
+    )
+    .unwrap_err();
+    assert!(matches!(error, EditError::Invalid(_)));
+
+    let oversized = apply(
+        &mut st,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 21,
+        },
+        &g,
+    )
+    .unwrap_err();
+    assert!(matches!(oversized, EditError::Invalid(_)));
+}
+
+#[test]
+fn moving_either_side_of_a_transition_prunes_it_and_undo_restores_it() {
+    let mut st = state(vec![video_track(
+        "v",
+        true,
+        vec![clip("a", 0, 100), clip("b", 100, 40)],
+    )]);
+    let g = SeqIdGen::default();
+    apply(
+        &mut st,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 12,
+        },
+        &g,
+    )
+    .unwrap();
+
+    apply(
+        &mut st,
+        EditCommand::MoveClips {
+            moves: vec![ClipMove {
+                clip_id: "b".into(),
+                to_track: 0,
+                to_frame: 110,
+            }],
+        },
+        &g,
+    )
+    .unwrap();
+    let outgoing = st.timeline.tracks[0]
+        .clips
+        .iter()
+        .find(|clip| clip.id == "a")
+        .unwrap();
+    assert!(outgoing.transition_out.is_none());
+
+    apply(&mut st, EditCommand::Undo, &g).unwrap();
+    let outgoing = st.timeline.tracks[0]
+        .clips
+        .iter()
+        .find(|clip| clip.id == "a")
+        .unwrap();
+    assert_eq!(outgoing.transition_out.as_ref().unwrap().to_clip_id, "b");
+}
+
 // ---- set_keyframes --------------------------------------------------------
 
 #[test]
@@ -847,6 +1434,8 @@ fn create_folder_and_move_asset_into_it() {
         source_height: None,
         source_fps: None,
         has_audio: None,
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
@@ -1089,6 +1678,11 @@ fn set_color_grade_applies_and_undoes() {
     let grade = ColorGrade {
         exposure: 0.5,
         saturation: 1.2,
+        hsl_secondary: Some(HslSecondary {
+            hue_center: 0.65,
+            hue_shift: 0.15,
+            ..Default::default()
+        }),
         ..Default::default()
     };
     let res = apply(
@@ -1108,6 +1702,84 @@ fn set_color_grade_applies_and_undoes() {
     // Undo restores the cleared grade.
     apply(&mut st, EditCommand::Undo, &g).unwrap();
     assert_eq!(find_clip(&st, "c").color_grade, None);
+    apply(&mut st, EditCommand::Redo, &g).unwrap();
+    assert_eq!(find_clip(&st, "c").color_grade, Some(grade));
+}
+
+#[test]
+fn set_lut_applies_adjusts_removes_and_round_trips_history() {
+    let mut state = one_clip_state();
+    let ids = SeqIdGen::default();
+    let reference =
+        LutReference::new("0123456789abcdef".repeat(4), "Known Transform", 1.0).unwrap();
+    apply(
+        &mut state,
+        EditCommand::SetLut {
+            clip_ids: vec!["c".into()],
+            lut: Some(reference.clone()),
+        },
+        &ids,
+    )
+    .unwrap();
+    assert_eq!(find_clip(&state, "c").lut.as_ref(), Some(&reference));
+
+    let adjusted = LutReference {
+        intensity: 0.35,
+        ..reference.clone()
+    };
+    apply(
+        &mut state,
+        EditCommand::SetLut {
+            clip_ids: vec!["c".into()],
+            lut: Some(adjusted.clone()),
+        },
+        &ids,
+    )
+    .unwrap();
+    assert_eq!(find_clip(&state, "c").lut.as_ref(), Some(&adjusted));
+    apply(&mut state, EditCommand::Undo, &ids).unwrap();
+    assert_eq!(find_clip(&state, "c").lut.as_ref(), Some(&reference));
+    apply(&mut state, EditCommand::Redo, &ids).unwrap();
+    assert_eq!(find_clip(&state, "c").lut.as_ref(), Some(&adjusted));
+
+    apply(
+        &mut state,
+        EditCommand::SetLut {
+            clip_ids: vec!["c".into()],
+            lut: None,
+        },
+        &ids,
+    )
+    .unwrap();
+    assert!(find_clip(&state, "c").lut.is_none());
+}
+
+#[test]
+fn set_color_grade_rejects_invalid_without_mutation() {
+    let mut st = one_clip_state();
+    let g = SeqIdGen::default();
+    let error = apply(
+        &mut st,
+        EditCommand::SetColorGrade {
+            clip_ids: vec!["c".into()],
+            grade: Some(ColorGrade {
+                lift_gamma_gain: LiftGammaGain {
+                    gamma: Rgb::new(0.0, 1.0, 1.0),
+                    ..Default::default()
+                },
+                ..Default::default()
+            }),
+        },
+        &g,
+    )
+    .expect_err("zero gamma must be rejected before mutation");
+    assert_eq!(
+        error.to_string(),
+        "invalid color grade: liftGammaGain.gamma.r must be finite and within (0, 4]"
+    );
+    assert_eq!(find_clip(&st, "c").color_grade, None);
+    assert_eq!(st.version(), 0);
+    assert!(!st.can_undo());
 }
 
 #[test]
@@ -1227,6 +1899,7 @@ fn set_masks_replaces_list() {
         },
         feather: 0.05,
         invert: false,
+        ..Mask::default()
     }];
     let res = apply(
         &mut st,
@@ -1253,6 +1926,29 @@ fn set_masks_replaces_list() {
     .unwrap();
     assert!(res2.changed);
     assert!(find_clip(&st, "c").masks.is_empty());
+
+    apply(&mut st, EditCommand::Undo, &g).unwrap();
+    assert_eq!(find_clip(&st, "c").masks, masks);
+    apply(&mut st, EditCommand::Redo, &g).unwrap();
+    assert!(find_clip(&st, "c").masks.is_empty());
+
+    let oversized_polygon = Mask {
+        shape: MaskShape::Poly {
+            points: vec![Point2::new(0.5, 0.5); 17],
+        },
+        ..Mask::default()
+    };
+    let err = apply(
+        &mut st,
+        EditCommand::SetMasks {
+            clip_ids: vec!["c".into()],
+            masks: vec![oversized_polygon],
+        },
+        &g,
+    )
+    .unwrap_err();
+    assert!(err.to_string().contains("3..=16 points"));
+    assert!(find_clip(&st, "c").masks.is_empty());
 }
 
 #[test]
@@ -1260,8 +1956,8 @@ fn set_effects_replaces_chain() {
     let mut st = one_clip_state();
     let g = SeqIdGen::default();
     let effects = vec![
-        Effect::new("gaussianBlur").with_param("radius", 4.0),
-        Effect::new("glow").with_param("intensity", 0.6),
+        Effect::new("grayscale").with_param("amount", 0.4),
+        Effect::new("sepia").with_param("amount", 0.6),
     ];
     let res = apply(
         &mut st,
@@ -1277,6 +1973,30 @@ fn set_effects_replaces_chain() {
     assert_eq!(find_clip(&st, "c").effects, effects);
 }
 
+#[test]
+fn set_effects_rejects_unknown_names_and_invalid_parameters_without_history() {
+    let g = SeqIdGen::default();
+    for effect in [
+        Effect::new("blur"),
+        Effect::new("sepia").with_param("radius", 2.0),
+        Effect::new("invert").with_param("amount", 1.1),
+    ] {
+        let mut st = one_clip_state();
+        let error = apply(
+            &mut st,
+            EditCommand::SetEffects {
+                clip_ids: vec!["c".into()],
+                effects: vec![effect],
+            },
+            &g,
+        )
+        .unwrap_err();
+        assert!(matches!(error, EditError::Invalid(_)));
+        assert!(find_clip(&st, "c").effects.is_empty());
+        assert_eq!(st.version(), 0);
+    }
+}
+
 #[test]
 fn advanced_effect_commands_reject_empty_and_missing() {
     let mut st = one_clip_state();
@@ -1299,7 +2019,7 @@ fn advanced_effect_commands_reject_empty_and_missing() {
             &mut st,
             EditCommand::SetEffects {
                 clip_ids: vec!["nope".into()],
-                effects: vec![Effect::new("blur")]
+                effects: vec![Effect::new("grayscale")]
             },
             &g
         ),
@@ -1368,6 +2088,8 @@ fn media_entry(id: &str, kind: ClipType, duration_secs: f64) -> MediaManifestEnt
         source_height: None,
         source_fps: None,
         has_audio: None,
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/src/archive.rs b/crates/opentake-project/src/archive.rs
index 841e6a94..1086d70f 100644
--- a/crates/opentake-project/src/archive.rs
+++ b/crates/opentake-project/src/archive.rs
@@ -404,6 +404,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/src/bundle.rs b/crates/opentake-project/src/bundle.rs
index 075a40c6..c903699b 100644
--- a/crates/opentake-project/src/bundle.rs
+++ b/crates/opentake-project/src/bundle.rs
@@ -174,6 +174,11 @@ impl Project {
     }
 
     /// Decode every project component from one retained root capability.
+    ///
+    /// Persisted compatibility is applied by each component's deserializer:
+    /// missing optional fields receive their legacy defaults, while explicit
+    /// schema versions are preserved. Saving the returned project therefore
+    /// writes the decoded state without silently promoting legacy versions.
     pub fn open_from_root(root: &ProjectRoot) -> Result<Self> {
         Self::open_from_root_with_hook(root, |_| {})
     }
@@ -192,6 +197,12 @@ impl Project {
         let (mut timeline, timeline_blockers, timeline_document) =
             decode_component::<Timeline>(&timeline_bytes, layout::TIMELINE_FILE)?;
         compatibility::repair_timeline_ids(&mut timeline, &timeline_document);
+        timeline
+            .validate_nested_sequences()
+            .map_err(|reason| ProjectError::InvalidTimeline {
+                file: layout::TIMELINE_FILE,
+                reason,
+            })?;
         after_component(layout::TIMELINE_FILE);
         let mut compatibility = ProjectCompatibility::default();
         compatibility.extend(timeline_blockers);
@@ -396,6 +407,13 @@ impl EncodedProject {
     /// Produce the exact byte snapshot before any destination path is created.
     fn prepare(project: &Project) -> Result<Self> {
         project.compatibility.ensure_writable()?;
+        project
+            .timeline
+            .validate_nested_sequences()
+            .map_err(|reason| ProjectError::InvalidTimeline {
+                file: layout::TIMELINE_FILE,
+                reason,
+            })?;
         Ok(Self {
             timeline: encode_component(layout::TIMELINE_FILE, &project.timeline)?,
             manifest: encode_component(layout::MANIFEST_FILE, &project.manifest)?,
diff --git a/crates/opentake-project/src/compatibility.rs b/crates/opentake-project/src/compatibility.rs
index 4bf6cf6b..716b9359 100644
--- a/crates/opentake-project/src/compatibility.rs
+++ b/crates/opentake-project/src/compatibility.rs
@@ -5,8 +5,8 @@
 //! that serde cannot see after a Swift-compatible `try?` fallback.
 
 use opentake_domain::{
-    AnimPair, Clip, Crop, Fill, Keyframe, KeyframeTrack, KeyframeValueWireShape, Rgba, Shadow,
-    TextStyle, Timeline, Track, Transform,
+    AnimPair, Clip, Crop, Fill, Keyframe, KeyframeTrack, KeyframeValueWireShape, NestedSequence,
+    Rgba, Shadow, TextStyle, Timeline, Track, Transform,
 };
 use serde_json::Value;
 use uuid::Uuid;
@@ -27,6 +27,25 @@ pub(crate) struct TimelineFallback {
 /// and clip ordering; a Track.clips fallback yields an empty decoded vector and
 /// is therefore skipped safely.
 pub(crate) fn repair_timeline_ids(timeline: &mut Timeline, document: &Value) {
+    repair_timeline_ids_inner(timeline, document);
+}
+
+fn repair_timeline_ids_inner(timeline: &mut Timeline, document: &Value) {
+    if let Some(raw_sequences) = document
+        .get(Timeline::NESTED_SEQUENCES_WIRE_FIELD)
+        .and_then(Value::as_array)
+    {
+        for (sequence_index, sequence) in timeline.nested_sequences.iter_mut().enumerate() {
+            let Some(raw_timeline) = raw_sequences
+                .get(sequence_index)
+                .and_then(|value| value.get(NestedSequence::TIMELINE_WIRE_FIELD))
+            else {
+                continue;
+            };
+            repair_timeline_ids_inner(&mut sequence.timeline, raw_timeline);
+        }
+    }
+
     let Some(raw_tracks) = document
         .get(Timeline::TRACKS_WIRE_FIELD)
         .and_then(Value::as_array)
@@ -112,6 +131,44 @@ pub(crate) fn scan_timeline(
     failed_tracks: &[bool],
     ignored: &mut Vec<String>,
 ) {
+    scan_timeline_inner(document, "", file, failed_tracks, ignored);
+}
+
+fn scan_timeline_inner(
+    document: &Value,
+    prefix: &str,
+    file: &str,
+    failed_tracks: &[bool],
+    ignored: &mut Vec<String>,
+) {
+    if let Some(sequences) = document
+        .get(Timeline::NESTED_SEQUENCES_WIRE_FIELD)
+        .and_then(Value::as_array)
+    {
+        for (sequence_index, sequence) in sequences.iter().enumerate() {
+            let sequence_path = prefixed(
+                prefix,
+                &format!("{}.{sequence_index}", Timeline::NESTED_SEQUENCES_WIRE_FIELD),
+            );
+            scan_object_keys(
+                Some(sequence),
+                &sequence_path,
+                NestedSequence::WIRE_FIELDS,
+                file,
+                ignored,
+            );
+            if let Some(child) = sequence.get(NestedSequence::TIMELINE_WIRE_FIELD) {
+                scan_timeline_inner(
+                    child,
+                    &format!("{sequence_path}.{}", NestedSequence::TIMELINE_WIRE_FIELD),
+                    file,
+                    &[],
+                    ignored,
+                );
+            }
+        }
+    }
+
     let Some(tracks) = document
         .get(Timeline::TRACKS_WIRE_FIELD)
         .and_then(Value::as_array)
@@ -120,7 +177,10 @@ pub(crate) fn scan_timeline(
     };
 
     for (track_index, track) in tracks.iter().enumerate() {
-        let track_path = format!("{}.{track_index}", Timeline::TRACKS_WIRE_FIELD);
+        let track_path = prefixed(
+            prefix,
+            &format!("{}.{track_index}", Timeline::TRACKS_WIRE_FIELD),
+        );
         for field in Track::TOLERANT_SCALAR_WIRE_FIELDS {
             scan_future_scalar_shape(
                 track.get(*field),
@@ -219,6 +279,14 @@ pub(crate) fn scan_timeline(
     }
 }
 
+fn prefixed(prefix: &str, suffix: &str) -> String {
+    if prefix.is_empty() {
+        suffix.to_string()
+    } else {
+        format!("{prefix}.{suffix}")
+    }
+}
+
 fn scan_decodable_clip_unknowns(clip: &Value, path: &str, file: &str, ignored: &mut Vec<String>) {
     let Ok(bytes) = serde_json::to_vec(clip) else {
         return;
diff --git a/crates/opentake-project/src/edl.rs b/crates/opentake-project/src/edl.rs
index bde2bdf6..ba4eaa68 100644
--- a/crates/opentake-project/src/edl.rs
+++ b/crates/opentake-project/src/edl.rs
@@ -48,7 +48,7 @@
 //! no cross-platform tape/source-timecode reader — see `fcpxml.rs`); the source
 //! window is `[trim_start, trim_start + source_frames_consumed)`.
 
-use opentake_domain::{Clip, MediaManifest, MediaResolver, Timeline, Track};
+use opentake_domain::{Clip, ClipType, MediaManifest, MediaResolver, Timeline, Track};
 
 /// Reel name for every event. Real source-tape names need a tape-timecode
 /// reader OpenTake lacks; `AX` ("auxiliary") is the CMX3600 convention for
@@ -100,14 +100,30 @@ impl Builder<'_> {
         out
     }
 
-    /// Clips of the topmost video track, sorted by start frame. CMX3600 holds a
-    /// single video track, so we pick the first visual track in timeline order.
+    /// Clips of the topmost editorial-media track, sorted by start frame.
+    ///
+    /// `ClipType::is_visual()` also includes text and Lottie tracks. Those are
+    /// overlays rather than CMX3600 video events, so selecting the first visual
+    /// track would export captions as `Offline` clips and hide the real video
+    /// track below. Pick the first track that actually contains video/image
+    /// media and omit overlay clips even when a mixed visual track contains
+    /// them.
     fn top_video_clips(&self) -> Vec<Clip> {
-        let track: Option<&Track> = self.timeline.tracks.iter().find(|t| t.kind.is_visual());
-        let Some(track) = track else {
-            return Vec::new();
-        };
-        let mut clips: Vec<Clip> = track.clips.clone();
+        let mut clips = self
+            .timeline
+            .tracks
+            .iter()
+            .filter(|track: &&Track| track.kind.is_visual())
+            .find_map(|track| {
+                let clips: Vec<Clip> = track
+                    .clips
+                    .iter()
+                    .filter(|clip| matches!(clip.media_type, ClipType::Video | ClipType::Image))
+                    .cloned()
+                    .collect();
+                (!clips.is_empty()).then_some(clips)
+            })
+            .unwrap_or_default();
         clips.sort_by_key(|c| c.start_frame);
         clips
     }
@@ -183,7 +199,7 @@ fn format_timecode(frame: i32, fps: i32, drop_frame: bool) -> String {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use opentake_domain::{ClipType, MediaManifestEntry, MediaSource};
+    use opentake_domain::{MediaManifestEntry, MediaSource};
 
     fn entry(id: &str, name: &str, kind: ClipType, duration: f64) -> MediaManifestEntry {
         MediaManifestEntry {
@@ -199,6 +215,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -367,6 +385,37 @@ mod tests {
         assert!(!edl.contains("002  AX"));
     }
 
+    #[test]
+    fn caption_overlay_track_does_not_shadow_video_track() {
+        let mut tl = Timeline::new();
+        tl.fps = 30;
+
+        let mut captions = Track::new("captions", ClipType::Text);
+        let mut caption = Clip::new("caption", "caption-media", 0, 90);
+        caption.media_type = ClipType::Text;
+        caption.source_clip_type = ClipType::Text;
+        caption.text_content = Some("Do not export me as Offline".into());
+        captions.clips.push(caption);
+
+        let mut video = Track::new("video", ClipType::Video);
+        video.clips.push(Clip::new("shot", "v1", 0, 120));
+
+        // Top-to-bottom order matches the real editor: captions above video.
+        tl.tracks.push(captions);
+        tl.tracks.push(video);
+
+        let edl = export_edl(
+            &tl,
+            &manifest(vec![entry("v1", "talking-head.mp4", ClipType::Video, 4.0)]),
+        );
+
+        assert!(edl.contains("* FROM CLIP NAME: talking-head.mp4"));
+        assert!(!edl.contains("Do not export me"));
+        assert!(!edl.contains("* FROM CLIP NAME: Offline"));
+        assert!(edl.contains("001  AX"));
+        assert!(!edl.contains("002  AX"));
+    }
+
     #[test]
     fn empty_timeline_is_header_only() {
         let tl = Timeline::new();
diff --git a/crates/opentake-project/src/error.rs b/crates/opentake-project/src/error.rs
index d0543a58..81bad137 100644
--- a/crates/opentake-project/src/error.rs
+++ b/crates/opentake-project/src/error.rs
@@ -50,6 +50,10 @@ pub enum ProjectError {
         blockers: Vec<String>,
     },
 
+    /// The decoded timeline graph is structurally unsafe to edit or render.
+    #[error("invalid timeline graph in {file}: {reason}")]
+    InvalidTimeline { file: &'static str, reason: String },
+
     /// Publication could not install the staged bundle or restore the prior
     /// target. The retained backup is deliberately left in place and the next
     /// save attempt will recover it before doing new work.
diff --git a/crates/opentake-project/src/fcpxml.rs b/crates/opentake-project/src/fcpxml.rs
index 17985e53..9f9d6dd7 100644
--- a/crates/opentake-project/src/fcpxml.rs
+++ b/crates/opentake-project/src/fcpxml.rs
@@ -1194,6 +1194,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -1272,6 +1274,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/src/fcpxml_modern_tests.rs b/crates/opentake-project/src/fcpxml_modern_tests.rs
index a6cb97de..e32e3bb4 100644
--- a/crates/opentake-project/src/fcpxml_modern_tests.rs
+++ b/crates/opentake-project/src/fcpxml_modern_tests.rs
@@ -20,6 +20,8 @@ fn entry(id: &str, name: &str, kind: ClipType, duration: f64) -> MediaManifestEn
         source_height: Some(1080),
         source_fps: Some(30.0),
         has_audio: Some(kind == ClipType::Video || kind == ClipType::Audio),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/src/layout.rs b/crates/opentake-project/src/layout.rs
index 4c096214..d50b1771 100644
--- a/crates/opentake-project/src/layout.rs
+++ b/crates/opentake-project/src/layout.rs
@@ -28,6 +28,9 @@ pub const THUMBNAIL_FILE: &str = "thumbnail.jpg";
 /// convention point inside this directory.
 pub const MEDIA_DIR: &str = "media";
 
+/// `media/luts/` — content-addressed, project-managed `.cube` files.
+pub const LUTS_DIR: &str = "luts";
+
 /// `chat-sessions/` — one `<session>.json` per agent chat session.
 ///
 /// OpenTake-specific: upstream stores these under `chat/`
@@ -61,6 +64,11 @@ pub fn media_dir(bundle: &Path) -> PathBuf {
     bundle.join(MEDIA_DIR)
 }
 
+/// Absolute path to the project-managed LUT directory.
+pub fn luts_dir(bundle: &Path) -> PathBuf {
+    media_dir(bundle).join(LUTS_DIR)
+}
+
 /// Absolute path to the `chat-sessions/` directory inside `bundle`.
 pub fn chat_sessions_dir(bundle: &Path) -> PathBuf {
     bundle.join(CHAT_SESSIONS_DIR)
diff --git a/crates/opentake-project/src/otio.rs b/crates/opentake-project/src/otio.rs
index 6d446e92..24ea2f13 100644
--- a/crates/opentake-project/src/otio.rs
+++ b/crates/opentake-project/src/otio.rs
@@ -279,6 +279,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(24.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/src/project_root.rs b/crates/opentake-project/src/project_root.rs
index 4faa1e9c..e0184918 100644
--- a/crates/opentake-project/src/project_root.rs
+++ b/crates/opentake-project/src/project_root.rs
@@ -436,6 +436,99 @@ impl ProjectRoot {
         Ok(())
     }
 
+    /// Read one project-managed LUT through retained no-follow directories.
+    pub fn read_lut(&self, name: &str, max_bytes: usize) -> Result<Option<Vec<u8>>> {
+        validate_leaf(name).map_err(|error| {
+            ProjectError::io(
+                self.path
+                    .join(crate::layout::MEDIA_DIR)
+                    .join(crate::layout::LUTS_DIR)
+                    .join(name),
+                error,
+            )
+        })?;
+        let Some(directory) = self.luts_directory(false)? else {
+            return Ok(None);
+        };
+        let path = self
+            .path
+            .join(crate::layout::MEDIA_DIR)
+            .join(crate::layout::LUTS_DIR)
+            .join(name);
+        let mut options = OpenOptions::new();
+        options.read(true).follow(FollowSymlinks::No);
+        #[cfg(unix)]
+        options.custom_flags(libc::O_NONBLOCK);
+        let mut file = match directory.open_with(name, &options) {
+            Ok(file) => file,
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => return Ok(None),
+            Err(error) => return Err(ProjectError::io(path, error)),
+        };
+        let metadata = file
+            .metadata()
+            .map_err(|error| ProjectError::io(&path, error))?;
+        if !metadata.is_file() || metadata.len() > max_bytes as u64 {
+            return Err(ProjectError::io(
+                path,
+                std::io::Error::new(
+                    std::io::ErrorKind::InvalidData,
+                    "LUT is not a bounded nofollow regular file",
+                ),
+            ));
+        }
+        let mut bytes = Vec::with_capacity(metadata.len() as usize);
+        Read::by_ref(&mut file)
+            .take(max_bytes as u64 + 1)
+            .read_to_end(&mut bytes)
+            .map_err(|error| ProjectError::io(&path, error))?;
+        if bytes.len() > max_bytes {
+            return Err(ProjectError::io(
+                path,
+                std::io::Error::new(
+                    std::io::ErrorKind::InvalidData,
+                    "LUT grew beyond the configured byte limit",
+                ),
+            ));
+        }
+        Ok(Some(bytes))
+    }
+
+    /// Atomically publish one validated, content-addressed LUT under
+    /// `media/luts/`. Callers validate both the bytes and digest before entry.
+    pub fn write_lut_atomic(&self, name: &str, bytes: &[u8]) -> Result<()> {
+        validate_leaf(name).map_err(|error| {
+            ProjectError::io(
+                self.path
+                    .join(crate::layout::MEDIA_DIR)
+                    .join(crate::layout::LUTS_DIR)
+                    .join(name),
+                error,
+            )
+        })?;
+        let directory = self
+            .luts_directory(true)?
+            .expect("create=true returns a directory");
+        let directory_path = self
+            .path
+            .join(crate::layout::MEDIA_DIR)
+            .join(crate::layout::LUTS_DIR);
+        let tmp_name = unique_temp_name(name);
+        let mut tmp = TransactionLeaf::create(&directory, &tmp_name)
+            .map_err(|error| ProjectError::io(directory_path.join(&tmp_name), error))?;
+        tmp.handle
+            .as_file_mut()
+            .write_all(bytes)
+            .map_err(|error| ProjectError::io(directory_path.join(&tmp_name), error))?;
+        tmp.handle
+            .as_file()
+            .sync_all()
+            .map_err(|error| ProjectError::io(directory_path.join(&tmp_name), error))?;
+        tmp.replace(&directory, Path::new(name))
+            .map_err(|error| ProjectError::io(directory_path.join(name), error))?;
+        tmp.cleanup_on_drop = false;
+        Ok(())
+    }
+
     /// List no-follow regular leaves in `chat-sessions/`. Callers own the
     /// filename policy (for example selecting only `<session>.json`).
     pub fn list_chat_session_files(&self, max_entries: usize) -> Result<Vec<OsString>> {
@@ -508,6 +601,71 @@ impl ProjectRoot {
             .map(Some)
             .map_err(|error| ProjectError::io(path, error))
     }
+
+    fn luts_directory(&self, create: bool) -> Result<Option<Dir>> {
+        let media_path = self.path.join(crate::layout::MEDIA_DIR);
+        match self.dir.symlink_metadata(crate::layout::MEDIA_DIR) {
+            Ok(metadata) if metadata.is_dir() && !metadata.file_type().is_symlink() => {}
+            Ok(_) => {
+                return Err(ProjectError::io(
+                    media_path,
+                    std::io::Error::new(
+                        std::io::ErrorKind::InvalidData,
+                        "media must be a nofollow directory",
+                    ),
+                ));
+            }
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound && create => {
+                self.dir
+                    .create_dir(crate::layout::MEDIA_DIR)
+                    .or_else(|error| {
+                        if error.kind() == std::io::ErrorKind::AlreadyExists {
+                            Ok(())
+                        } else {
+                            Err(error)
+                        }
+                    })
+                    .map_err(|error| ProjectError::io(&media_path, error))?;
+            }
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => return Ok(None),
+            Err(error) => return Err(ProjectError::io(&media_path, error)),
+        }
+        let media = self
+            .dir
+            .open_dir_nofollow(crate::layout::MEDIA_DIR)
+            .map_err(|error| ProjectError::io(&media_path, error))?;
+        let luts_path = media_path.join(crate::layout::LUTS_DIR);
+        match media.symlink_metadata(crate::layout::LUTS_DIR) {
+            Ok(metadata) if metadata.is_dir() && !metadata.file_type().is_symlink() => {}
+            Ok(_) => {
+                return Err(ProjectError::io(
+                    luts_path,
+                    std::io::Error::new(
+                        std::io::ErrorKind::InvalidData,
+                        "luts must be a nofollow directory",
+                    ),
+                ));
+            }
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound && create => {
+                media
+                    .create_dir(crate::layout::LUTS_DIR)
+                    .or_else(|error| {
+                        if error.kind() == std::io::ErrorKind::AlreadyExists {
+                            Ok(())
+                        } else {
+                            Err(error)
+                        }
+                    })
+                    .map_err(|error| ProjectError::io(&luts_path, error))?;
+            }
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => return Ok(None),
+            Err(error) => return Err(ProjectError::io(&luts_path, error)),
+        }
+        media
+            .open_dir_nofollow(crate::layout::LUTS_DIR)
+            .map(Some)
+            .map_err(|error| ProjectError::io(luts_path, error))
+    }
 }
 
 /// One complete-bundle sibling publication. The persistent lock leaf
@@ -642,15 +800,33 @@ impl BundlePublisher {
     }
 
     pub(crate) fn publish(mut self) -> Result<ProjectRoot> {
-        #[cfg(test)]
-        if FAIL_PUBLISH_AFTER_BACKUP.with(|fail| fail.replace(false)) {
-            return self.publish_with_hook(|| {
-                Err(std::io::Error::other(
-                    "injected publication failure after backup",
-                ))
-            });
+        let result = {
+            #[cfg(test)]
+            if FAIL_PUBLISH_AFTER_BACKUP.with(|fail| fail.replace(false)) {
+                self.publish_with_hook(|| {
+                    Err(std::io::Error::other(
+                        "injected publication failure after backup",
+                    ))
+                })
+            } else {
+                self.publish_with_hook(|| Ok(()))
+            }
+
+            #[cfg(not(test))]
+            self.publish_with_hook(|| Ok(()))
+        };
+
+        // A caller may immediately start the next complete-bundle save while
+        // retaining the returned ProjectRoot. Make that successful handoff
+        // explicit instead of depending on the two cloned lock handles being
+        // dropped at the end of this function. Error paths retain the lock
+        // through Drop's staged-artifact cleanup. Closing the handles remains
+        // the fallback; an unlock error cannot safely turn an already
+        // committed publication into a reported failure.
+        if result.is_ok() {
+            let _ = self._lock.unlock();
         }
-        self.publish_with_hook(|| Ok(()))
+        result
     }
 
     fn publish_with_hook(
@@ -2176,6 +2352,38 @@ mod tests {
             .exists());
     }
 
+    #[test]
+    fn publish_releases_the_transaction_lock_before_returning() {
+        let tmp = TmpDir::new("publish-lock-handoff");
+        let target = tmp.path().join("Existing.opentake");
+        fs::create_dir_all(&target).unwrap();
+        fs::write(target.join("project.json"), b"initial timeline").unwrap();
+        let lock_path = tmp.path().join(".Existing.opentake.opentake-lock");
+
+        for generation in 0..32 {
+            let publisher = ProjectRoot::begin_replace(&target).unwrap();
+            let expected = format!("timeline generation {generation}");
+            publisher
+                .stage()
+                .write_atomic("project.json", expected.as_bytes())
+                .unwrap();
+            let root = publisher.publish().unwrap();
+
+            let lock = fs::OpenOptions::new()
+                .read(true)
+                .write(true)
+                .open(&lock_path)
+                .unwrap();
+            lock.try_lock()
+                .expect("publish must hand off its transaction lock before returning");
+            lock.unlock().unwrap();
+            assert_eq!(
+                root.read_optional("project.json").unwrap().unwrap(),
+                expected.as_bytes()
+            );
+        }
+    }
+
     #[test]
     fn postcommit_backup_cleanup_failure_returns_success_and_recovers_on_retry() {
         let tmp = TmpDir::new("postcommit-cleanup");
diff --git a/crates/opentake-project/src/safe_fs/tests.rs b/crates/opentake-project/src/safe_fs/tests.rs
index 9deb61b3..bdd69b84 100644
--- a/crates/opentake-project/src/safe_fs/tests.rs
+++ b/crates/opentake-project/src/safe_fs/tests.rs
@@ -109,6 +109,119 @@ fn component_accepts_safe_names_and_rejects_too_long_and_unsafe_names() {
     }
 }
 
+#[cfg(windows)]
+struct WindowsContractDir(std::path::PathBuf);
+
+#[cfg(windows)]
+impl WindowsContractDir {
+    fn new() -> Self {
+        static NEXT: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(0);
+        let id = NEXT.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
+        let path = std::env::temp_dir().join(format!(
+            "opentake-windows-contract-{}-{id}",
+            std::process::id()
+        ));
+        std::fs::create_dir(&path).expect("create Windows contract fixture");
+        Self(path)
+    }
+}
+
+#[cfg(windows)]
+impl Drop for WindowsContractDir {
+    fn drop(&mut self) {
+        let _ = std::fs::remove_dir_all(&self.0);
+    }
+}
+
+#[cfg(windows)]
+#[test]
+fn windows_contract() {
+    use std::io::SeekFrom;
+
+    let fixture = WindowsContractDir::new();
+    let root = capture_absolute_directory(&fixture.0, DirectoryAccess::MutateChildren)
+        .expect("capture local Windows fixture");
+
+    let stage_name = ComponentName::new("stage").unwrap();
+    let quarantine_name = ComponentName::new("quarantine").unwrap();
+    let nested_name = ComponentName::new("nested").unwrap();
+    let leaf_name = ComponentName::new("leaf.bin").unwrap();
+    let stage = create_stage_dir_new(&root, &stage_name, CreatePermissions::Inherit)
+        .expect("create retained stage");
+    let nested = create_dir_new(
+        stage.directory(),
+        &nested_name,
+        CreatePermissions::Inherit,
+        DirectoryAccess::MutateChildren,
+    )
+    .expect("create nested directory");
+    let mut leaf = create_file_new(&nested, &leaf_name, CreatePermissions::Inherit)
+        .expect("create retained file");
+    leaf.write_all(b"windows-capability-relative")
+        .expect("write retained file");
+    leaf.flush().expect("flush retained file");
+    leaf.sync_all().expect("sync retained file");
+    leaf.seek(SeekFrom::Start(0)).expect("rewind retained file");
+    let mut bytes = [0; 27];
+    assert_eq!(leaf.read(&mut bytes).unwrap(), bytes.len());
+    assert_eq!(&bytes, b"windows-capability-relative");
+    drop(leaf);
+    drop(nested);
+
+    let quarantine = quarantine_stage(stage, &root, quarantine_name.clone())
+        .expect("quarantine retained stage without replacement");
+    cleanup_quarantined_tree(quarantine).expect("delete quarantined tree by retained handles");
+    assert!(matches!(
+        query_child_nofollow(&root, &quarantine_name).unwrap(),
+        ChildState::Absent
+    ));
+
+    let published_name = ComponentName::new("published").unwrap();
+    let published_stage_name = ComponentName::new("publish-stage").unwrap();
+    let published_stage =
+        create_stage_dir_new(&root, &published_stage_name, CreatePermissions::Inherit)
+            .expect("create publish stage");
+    publish_stage_noreplace(published_stage, &root, published_name.clone())
+        .expect("publish retained stage without replacement");
+    assert!(matches!(
+        query_child_nofollow(&root, &published_name).unwrap(),
+        ChildState::Present(EntryMetadata {
+            kind: EntryKind::Directory,
+            ..
+        })
+    ));
+
+    let collision_stage_name = ComponentName::new("collision-stage").unwrap();
+    let collision_stage =
+        create_stage_dir_new(&root, &collision_stage_name, CreatePermissions::Inherit)
+            .expect("create collision stage");
+    assert!(matches!(
+        publish_stage_noreplace(collision_stage, &root, published_name),
+        Err(SafeFsError::AlreadyExists {
+            operation: SafeFsOperation::RenameNoReplaceSameParent,
+        })
+    ));
+    assert!(matches!(
+        query_child_nofollow(&root, &collision_stage_name).unwrap(),
+        ChildState::Present(EntryMetadata {
+            kind: EntryKind::Directory,
+            ..
+        })
+    ));
+}
+
+#[cfg(windows)]
+#[test]
+fn synchronous_nt_pending_is_invariant_error() {
+    assert!(matches!(
+        super::windows::synchronous_pending_contract_for_test(),
+        Err(SafeFsError::Os {
+            operation: SafeFsOperation::ReadFile,
+            raw: RawOsError::NtStatus { .. },
+        })
+    ));
+}
+
 #[cfg(any(target_os = "linux", target_os = "macos"))]
 mod unix_contract {
     use super::super::capability::CleanupCapability;
diff --git a/crates/opentake-project/src/safe_fs/windows.rs b/crates/opentake-project/src/safe_fs/windows.rs
index e5be68c7..a0865f60 100644
--- a/crates/opentake-project/src/safe_fs/windows.rs
+++ b/crates/opentake-project/src/safe_fs/windows.rs
@@ -23,22 +23,24 @@ use windows_sys::Win32::Foundation::{
     STATUS_OBJECT_NAME_NOT_FOUND, STATUS_OBJECT_PATH_NOT_FOUND, STATUS_OBJECT_TYPE_MISMATCH,
     STATUS_PENDING, STATUS_REPARSE_POINT_ENCOUNTERED, STATUS_SHARING_VIOLATION, UNICODE_STRING,
 };
-use windows_sys::Win32::Security::SECURITY_DESCRIPTOR;
+use windows_sys::Win32::Security::*;
 use windows_sys::Win32::Storage::FileSystem::{
     CreateFileW, FileAttributeTagInfo, FileIdInfo, FileRemoteProtocolInfo, FileStandardInfo,
     GetDriveTypeW, GetFileInformationByHandleEx, GetVolumeInformationByHandleW,
     GetVolumeNameForVolumeMountPointW, GetVolumePathNameW, DELETE, FILE_ACCESS_RIGHTS,
-    FILE_ADD_FILE, FILE_ADD_SUBDIRECTORY, FILE_ATTRIBUTE_NORMAL, FILE_ATTRIBUTE_REPARSE_POINT,
-    FILE_ATTRIBUTE_TAG_INFO, FILE_DELETE_CHILD, FILE_FLAGS_AND_ATTRIBUTES,
-    FILE_FLAG_BACKUP_SEMANTICS, FILE_FLAG_OPEN_REPARSE_POINT, FILE_ID_INFO, FILE_LIST_DIRECTORY,
-    FILE_READ_ATTRIBUTES, FILE_READ_DATA, FILE_REMOTE_PROTOCOL_INFO, FILE_SHARE_MODE,
-    FILE_SHARE_READ, FILE_SHARE_WRITE, FILE_STANDARD_INFO, FILE_TRAVERSE, FILE_WRITE_DATA,
-    GET_FILEEX_INFO_LEVELS, MAXIMUM_REPARSE_DATA_BUFFER_SIZE, OPEN_EXISTING, READ_CONTROL,
-    SYNCHRONIZE,
+    FILE_ADD_FILE, FILE_ADD_SUBDIRECTORY, FILE_ALL_ACCESS, FILE_ATTRIBUTE_NORMAL,
+    FILE_ATTRIBUTE_REPARSE_POINT, FILE_ATTRIBUTE_TAG_INFO, FILE_DELETE_CHILD,
+    FILE_FLAGS_AND_ATTRIBUTES, FILE_FLAG_BACKUP_SEMANTICS, FILE_FLAG_OPEN_REPARSE_POINT,
+    FILE_ID_INFO, FILE_LIST_DIRECTORY, FILE_READ_ATTRIBUTES, FILE_READ_DATA,
+    FILE_REMOTE_PROTOCOL_INFO, FILE_SHARE_MODE, FILE_SHARE_READ, FILE_SHARE_WRITE,
+    FILE_STANDARD_INFO, FILE_TRAVERSE, FILE_WRITE_DATA, GET_FILEEX_INFO_LEVELS,
+    MAXIMUM_REPARSE_DATA_BUFFER_SIZE, OPEN_EXISTING, READ_CONTROL, SYNCHRONIZE,
 };
 use windows_sys::Win32::System::Ioctl::FSCTL_GET_REPARSE_POINT;
-use windows_sys::Win32::System::SystemServices::FILE_CS_FLAG_CASE_SENSITIVE_DIR;
-use windows_sys::Win32::System::Threading::GetCurrentProcess;
+use windows_sys::Win32::System::SystemServices::{
+    ACCESS_ALLOWED_ACE_TYPE, FILE_CS_FLAG_CASE_SENSITIVE_DIR, SECURITY_DESCRIPTOR_REVISION,
+};
+use windows_sys::Win32::System::Threading::{GetCurrentProcess, OpenProcessToken};
 use windows_sys::Win32::System::IO::IO_STATUS_BLOCK;
 
 const SHARE: FILE_SHARE_MODE = FILE_SHARE_READ | FILE_SHARE_WRITE;
@@ -48,6 +50,7 @@ const DIRECTORY_BUFFER_BYTES: usize = 64 * 1024;
 const REPARSE_HEADER_BYTES: usize = 8;
 const STATUS_SUCCESS: NTSTATUS = 0;
 const BOOL_FALSE: BOOL = 0;
+const BOOL_TRUE: BOOL = 1;
 const DRIVE_REMOVABLE: u32 = 2;
 const DRIVE_FIXED: u32 = 3;
 
@@ -340,6 +343,16 @@ fn complete_nt(
     Ok(())
 }
 
+#[cfg(test)]
+pub(super) fn synchronous_pending_contract_for_test() -> Result<()> {
+    let mut iosb = IO_STATUS_BLOCK::default();
+    // Initialize the Status member even though `complete_nt` must reject the
+    // returned STATUS_PENDING before reading it.
+    iosb.Anonymous.Status = STATUS_SUCCESS;
+    iosb.Information = usize::MAX;
+    complete_nt(SafeFsOperation::ReadFile, STATUS_PENDING, &iosb)
+}
+
 #[allow(clippy::too_many_arguments)] // Mirrors the fixed NtCreateFile operation contract.
 fn nt_create_relative(
     parent: HANDLE,
@@ -1319,18 +1332,496 @@ fn require_mutation(parent: &DirectoryAuthority, operation: SafeFsOperation) ->
     }
 }
 
-fn owner_only_refusal<T>() -> Result<T> {
-    Err(SafeFsError::UnsupportedSecureFilesystem {
+struct OwnerOnlySecurity {
+    sid: Vec<usize>,
+    _acl: Vec<usize>,
+    descriptor: Box<SECURITY_DESCRIPTOR>,
+    ace_flags: ACE_FLAGS,
+}
+
+impl OwnerOnlySecurity {
+    fn new(directory: bool) -> Result<Self> {
+        let operation = SafeFsOperation::VerifySecurityDescriptor;
+        let mut token_raw = null_mut();
+        // SAFETY: the current-process pseudo-handle is valid and the output pointer is writable.
+        if unsafe { OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &mut token_raw) } == 0 {
+            return Err(last_win32(operation));
+        }
+        let token = OwnedHandle::new(token_raw, operation)?;
+        let mut needed = 0u32;
+        // SAFETY: documented sizing call with a null output buffer.
+        let first =
+            unsafe { GetTokenInformation(token.raw(), TokenOwner, null_mut(), 0, &mut needed) };
+        if first != 0
+            || unsafe { GetLastError() }
+                != windows_sys::Win32::Foundation::ERROR_INSUFFICIENT_BUFFER
+            || needed < size_of::<TOKEN_OWNER>() as u32
+        {
+            return Err(last_win32(operation));
+        }
+        let mut token_words = vec![0usize; (needed as usize).div_ceil(size_of::<usize>())];
+        // SAFETY: aligned storage is writable for exactly `needed` bytes.
+        if unsafe {
+            GetTokenInformation(
+                token.raw(),
+                TokenOwner,
+                token_words.as_mut_ptr().cast(),
+                needed,
+                &mut needed,
+            )
+        } == 0
+        {
+            return Err(last_win32(operation));
+        }
+        // SAFETY: the successful TokenOwner query initialized a TOKEN_OWNER value.
+        let owner = unsafe { (*(token_words.as_ptr().cast::<TOKEN_OWNER>())).Owner };
+        if owner.is_null() || unsafe { IsValidSid(owner) } == 0 {
+            return Err(last_win32(operation));
+        }
+        // SAFETY: `owner` is a validated SID returned in the live token buffer.
+        let sid_len = usize::try_from(unsafe { GetLengthSid(owner) }).map_err(|_| {
+            SafeFsError::InvalidNativeBuffer {
+                operation,
+                reason: NativeBufferReason::SecurityDescriptorMalformed,
+            }
+        })?;
+        let mut sid = vec![0usize; sid_len.div_ceil(size_of::<usize>())];
+        // SAFETY: destination capacity is at least sid_len and owner is a validated SID.
+        if unsafe { CopySid(sid_len as u32, sid.as_mut_ptr().cast(), owner) } == 0 {
+            return Err(last_win32(operation));
+        }
+        drop(token_words);
+        drop(token);
+
+        let acl_bytes = size_of::<ACL>()
+            .checked_add(size_of::<ACCESS_ALLOWED_ACE>() - size_of::<u32>())
+            .and_then(|value| value.checked_add(sid_len))
+            .ok_or(SafeFsError::InvalidNativeBuffer {
+                operation,
+                reason: NativeBufferReason::LengthOverflow,
+            })?;
+        let acl_len = u32::try_from(acl_bytes).map_err(|_| SafeFsError::InvalidNativeBuffer {
+            operation,
+            reason: NativeBufferReason::LengthOverflow,
+        })?;
+        if acl_bytes > u16::MAX as usize {
+            return Err(SafeFsError::InvalidNativeBuffer {
+                operation,
+                reason: NativeBufferReason::LengthOverflow,
+            });
+        }
+        let mut acl = vec![0usize; acl_bytes.div_ceil(size_of::<usize>())];
+        let ace_flags = if directory {
+            OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE
+        } else {
+            0
+        };
+        // SAFETY: aligned ACL storage and the copied SID remain live inside Self.
+        if unsafe { InitializeAcl(acl.as_mut_ptr().cast(), acl_len, ACL_REVISION) } == 0
+            || unsafe {
+                AddAccessAllowedAceEx(
+                    acl.as_mut_ptr().cast(),
+                    ACL_REVISION,
+                    ace_flags,
+                    FILE_ALL_ACCESS,
+                    sid.as_mut_ptr().cast(),
+                )
+            } == 0
+        {
+            return Err(last_win32(operation));
+        }
+        // SAFETY: SECURITY_DESCRIPTOR is a C POD initialized immediately below.
+        let mut descriptor = Box::<SECURITY_DESCRIPTOR>::new(unsafe { std::mem::zeroed() });
+        // SAFETY: the boxed descriptor has a stable address and ACL storage remains owned by Self.
+        if unsafe {
+            InitializeSecurityDescriptor(
+                (&mut *descriptor as *mut SECURITY_DESCRIPTOR).cast(),
+                SECURITY_DESCRIPTOR_REVISION,
+            )
+        } == 0
+            || unsafe {
+                SetSecurityDescriptorDacl(
+                    (&mut *descriptor as *mut SECURITY_DESCRIPTOR).cast(),
+                    BOOL_TRUE,
+                    acl.as_mut_ptr().cast(),
+                    BOOL_FALSE,
+                )
+            } == 0
+            || unsafe {
+                SetSecurityDescriptorControl(
+                    (&mut *descriptor as *mut SECURITY_DESCRIPTOR).cast(),
+                    SE_DACL_PROTECTED,
+                    SE_DACL_PROTECTED,
+                )
+            } == 0
+        {
+            return Err(last_win32(operation));
+        }
+        Ok(Self {
+            sid,
+            _acl: acl,
+            descriptor,
+            ace_flags,
+        })
+    }
+
+    fn descriptor_ptr(&self) -> *const SECURITY_DESCRIPTOR {
+        &*self.descriptor
+    }
+}
+
+fn malformed_security() -> SafeFsError {
+    SafeFsError::InvalidNativeBuffer {
         operation: SafeFsOperation::VerifySecurityDescriptor,
-        reason: SecureFilesystemReason::UnsupportedTarget,
-    })
+        reason: NativeBufferReason::SecurityDescriptorMalformed,
+    }
 }
 
-fn require_inherited_permissions(permissions: CreatePermissions) -> Result<()> {
-    match permissions {
-        CreatePermissions::Inherit => Ok(()),
-        CreatePermissions::OwnerOnly => owner_only_refusal(),
+fn checked_subslice(
+    base: usize,
+    length: usize,
+    pointer: usize,
+    needed: usize,
+) -> Result<std::ops::Range<usize>> {
+    let end = base.checked_add(length).ok_or_else(malformed_security)?;
+    let pointer_end = pointer.checked_add(needed).ok_or_else(malformed_security)?;
+    if pointer < base || pointer_end > end {
+        return Err(malformed_security());
     }
+    Ok(pointer - base..pointer_end - base)
+}
+
+fn checked_sid_length(buffer: &[u8], sid: *const c_void) -> Result<usize> {
+    const SID_PREFIX: usize = 8;
+    let range = checked_subslice(
+        buffer.as_ptr() as usize,
+        buffer.len(),
+        sid as usize,
+        SID_PREFIX,
+    )?;
+    let count = usize::from(buffer[range.start + 1]);
+    let length = SID_PREFIX
+        .checked_add(
+            count
+                .checked_mul(size_of::<u32>())
+                .ok_or_else(malformed_security)?,
+        )
+        .ok_or_else(malformed_security)?;
+    checked_subslice(buffer.as_ptr() as usize, buffer.len(), sid as usize, length)?;
+    // SAFETY: the SID prefix and every declared sub-authority are inside buffer.
+    if unsafe { IsValidSid(sid.cast_mut()) } == 0 {
+        return Err(malformed_security());
+    }
+    // SAFETY: IsValidSid accepted the fully bounded SID.
+    if usize::try_from(unsafe { GetLengthSid(sid.cast_mut()) }).map_err(|_| malformed_security())?
+        != length
+    {
+        return Err(malformed_security());
+    }
+    Ok(length)
+}
+
+fn verify_single_owner_ace(
+    descriptor_bytes: &[u8],
+    dacl: *mut ACL,
+    acl_bytes_in_use: usize,
+    ace: *mut c_void,
+    expected: &OwnerOnlySecurity,
+) -> Result<()> {
+    let dacl_start = dacl as usize;
+    let dacl_range = checked_subslice(
+        descriptor_bytes.as_ptr() as usize,
+        descriptor_bytes.len(),
+        dacl_start,
+        acl_bytes_in_use.max(size_of::<ACL>()),
+    )?;
+    if acl_bytes_in_use < size_of::<ACL>() || dacl_range.len() != acl_bytes_in_use {
+        return Err(malformed_security());
+    }
+    let ace_start = ace as usize;
+    checked_subslice(
+        dacl_start,
+        acl_bytes_in_use,
+        ace_start,
+        size_of::<windows_sys::Win32::Security::ACE_HEADER>(),
+    )?;
+    // SAFETY: only the fixed ACE header bytes were bounds checked; read unaligned.
+    let header =
+        unsafe { std::ptr::read_unaligned(ace.cast::<windows_sys::Win32::Security::ACE_HEADER>()) };
+    if u32::from(header.AceType) != ACCESS_ALLOWED_ACE_TYPE {
+        return Err(malformed_security());
+    }
+    let ace_size = usize::from(header.AceSize);
+    let sid_offset = offset_of!(ACCESS_ALLOWED_ACE, SidStart);
+    if ace_size < sid_offset.checked_add(8).ok_or_else(malformed_security)? {
+        return Err(malformed_security());
+    }
+    checked_subslice(dacl_start, acl_bytes_in_use, ace_start, ace_size)?;
+    let sid_ptr = ace_start
+        .checked_add(sid_offset)
+        .ok_or_else(malformed_security)? as *const c_void;
+    let sid_length = checked_sid_length(descriptor_bytes, sid_ptr)?;
+    if sid_offset
+        .checked_add(sid_length)
+        .ok_or_else(malformed_security)?
+        != ace_size
+    {
+        return Err(malformed_security());
+    }
+    // SAFETY: ACE type, size, ACL bounds and SID range were established above.
+    let allowed = unsafe { std::ptr::read_unaligned(ace.cast::<ACCESS_ALLOWED_ACE>()) };
+    let expected_flags = u8::try_from(expected.ace_flags).map_err(|_| malformed_security())?;
+    if allowed.Header.AceFlags != expected_flags
+        || allowed.Mask != FILE_ALL_ACCESS
+        || unsafe { EqualSid(sid_ptr.cast_mut(), expected.sid.as_ptr().cast_mut().cast()) } == 0
+    {
+        return Err(malformed_security());
+    }
+    Ok(())
+}
+
+fn verify_owner_only(handle: HANDLE, expected: &OwnerOnlySecurity) -> Result<()> {
+    let operation = SafeFsOperation::VerifySecurityDescriptor;
+    let information = OWNER_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION;
+    let mut needed = 0u32;
+    // SAFETY: documented sizing call against a retained handle.
+    unsafe { GetKernelObjectSecurity(handle, information, null_mut(), 0, &mut needed) };
+    if unsafe { GetLastError() } != windows_sys::Win32::Foundation::ERROR_INSUFFICIENT_BUFFER {
+        return Err(last_win32(operation));
+    }
+    let mut words = vec![0usize; (needed as usize).div_ceil(size_of::<usize>())];
+    // SAFETY: aligned storage is writable for exactly needed bytes.
+    if unsafe {
+        GetKernelObjectSecurity(
+            handle,
+            information,
+            words.as_mut_ptr().cast(),
+            needed,
+            &mut needed,
+        )
+    } == 0
+    {
+        return Err(last_win32(operation));
+    }
+    // SAFETY: the successful query initialized exactly `needed` bytes.
+    let descriptor_bytes =
+        unsafe { std::slice::from_raw_parts_mut(words.as_mut_ptr().cast::<u8>(), needed as usize) };
+    if descriptor_bytes.len() < size_of::<SECURITY_DESCRIPTOR>() {
+        return Err(malformed_security());
+    }
+    let descriptor = descriptor_bytes.as_mut_ptr().cast::<SECURITY_DESCRIPTOR>();
+    let mut control = 0u16;
+    let mut revision = 0u32;
+    let mut owner = null_mut();
+    let mut owner_defaulted = BOOL_FALSE;
+    let mut dacl = null_mut();
+    let mut present = BOOL_FALSE;
+    let mut defaulted = BOOL_FALSE;
+    // SAFETY: the kernel returned a self-relative descriptor in aligned storage.
+    if unsafe { GetSecurityDescriptorControl(descriptor.cast(), &mut control, &mut revision) } == 0
+        || unsafe {
+            GetSecurityDescriptorOwner(descriptor.cast(), &mut owner, &mut owner_defaulted)
+        } == 0
+        || unsafe {
+            GetSecurityDescriptorDacl(descriptor.cast(), &mut present, &mut dacl, &mut defaulted)
+        } == 0
+        || control & SE_DACL_PROTECTED == 0
+        || owner_defaulted != BOOL_FALSE
+        || present == BOOL_FALSE
+        || defaulted != BOOL_FALSE
+        || dacl.is_null()
+        || owner.is_null()
+    {
+        return Err(malformed_security());
+    }
+    #[cfg(test)]
+    let descriptor_fixture = take_owner_descriptor_fixture();
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::NullOwner) {
+        owner = null_mut();
+    }
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::InvalidOwner) {
+        owner = descriptor_bytes
+            .as_mut_ptr()
+            .wrapping_add(descriptor_bytes.len() - 1)
+            .cast();
+    }
+    if owner.is_null() {
+        return Err(malformed_security());
+    }
+    checked_sid_length(descriptor_bytes, owner.cast_const())?;
+    // SAFETY: owner SID is fully bounded and validated in descriptor_bytes.
+    if unsafe { EqualSid(owner, expected.sid.as_ptr().cast_mut().cast()) } == 0 {
+        return Err(malformed_security());
+    }
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::DaclOutOfRange) {
+        dacl = descriptor_bytes
+            .as_mut_ptr()
+            .wrapping_add(descriptor_bytes.len() + 1)
+            .cast();
+    }
+    checked_subslice(
+        descriptor_bytes.as_ptr() as usize,
+        descriptor_bytes.len(),
+        dacl as usize,
+        size_of::<ACL>(),
+    )?;
+    let mut acl_info = ACL_SIZE_INFORMATION::default();
+    // SAFETY: the DACL fixed header is bounded and output is writable.
+    if unsafe {
+        GetAclInformation(
+            dacl,
+            (&mut acl_info as *mut ACL_SIZE_INFORMATION).cast(),
+            size_of::<ACL_SIZE_INFORMATION>() as u32,
+            AclSizeInformation,
+        )
+    } == 0
+    {
+        return Err(malformed_security());
+    }
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::WrongAceCount) {
+        acl_info.AceCount = 2;
+    }
+    if acl_info.AceCount != 1 {
+        return Err(malformed_security());
+    }
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::AclBytesOutOfRange) {
+        acl_info.AclBytesInUse = u32::MAX;
+    }
+    let acl_bytes_in_use =
+        usize::try_from(acl_info.AclBytesInUse).map_err(|_| malformed_security())?;
+    checked_subslice(
+        descriptor_bytes.as_ptr() as usize,
+        descriptor_bytes.len(),
+        dacl as usize,
+        acl_bytes_in_use.max(size_of::<ACL>()),
+    )?;
+    let mut ace = null_mut();
+    // SAFETY: the ACL and AclBytesInUse are bounded inside descriptor storage.
+    if unsafe { GetAce(dacl, 0, &mut ace) } == 0 || ace.is_null() {
+        return Err(last_win32(operation));
+    }
+    #[cfg(test)]
+    if descriptor_fixture == Some(OwnerDescriptorFixture::AceOutOfRange) {
+        ace = descriptor_bytes
+            .as_mut_ptr()
+            .wrapping_add(descriptor_bytes.len() + 1)
+            .cast();
+    }
+    #[cfg(test)]
+    if let Some(fixture) = descriptor_fixture {
+        // SAFETY: GetAce returned storage inside the already bounded single-entry
+        // ACL. Mutations remain inside that allocation and are consumed by the
+        // release bounds-first verifier before any kernel call.
+        unsafe {
+            let header = ace.cast::<windows_sys::Win32::Security::ACE_HEADER>();
+            match fixture {
+                OwnerDescriptorFixture::WrongAceType => (*header).AceType = 0x7f,
+                OwnerDescriptorFixture::UndersizedAce => {
+                    (*header).AceSize =
+                        size_of::<windows_sys::Win32::Security::ACE_HEADER>() as u16;
+                }
+                OwnerDescriptorFixture::OversizedSid => {
+                    let sid = (ace as *mut u8).add(offset_of!(ACCESS_ALLOWED_ACE, SidStart));
+                    *sid.add(1) = u8::MAX;
+                }
+                OwnerDescriptorFixture::InvalidSid => {
+                    let sid = (ace as *mut u8).add(offset_of!(ACCESS_ALLOWED_ACE, SidStart));
+                    *sid = 0;
+                }
+                OwnerDescriptorFixture::NullOwner
+                | OwnerDescriptorFixture::InvalidOwner
+                | OwnerDescriptorFixture::DaclOutOfRange
+                | OwnerDescriptorFixture::AclBytesOutOfRange
+                | OwnerDescriptorFixture::WrongAceCount
+                | OwnerDescriptorFixture::AceOutOfRange => {}
+            }
+        }
+    }
+    verify_single_owner_ace(descriptor_bytes, dacl, acl_bytes_in_use, ace, expected)
+}
+
+#[cfg(test)]
+static FORCE_DACL_VERIFY_FAILURE: std::sync::atomic::AtomicBool =
+    std::sync::atomic::AtomicBool::new(false);
+
+#[cfg(test)]
+fn force_next_owner_verification_failure() {
+    FORCE_DACL_VERIFY_FAILURE.store(true, std::sync::atomic::Ordering::SeqCst);
+}
+
+#[cfg(test)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+enum OwnerDescriptorFixture {
+    WrongAceType,
+    UndersizedAce,
+    OversizedSid,
+    InvalidSid,
+    NullOwner,
+    InvalidOwner,
+    DaclOutOfRange,
+    AclBytesOutOfRange,
+    WrongAceCount,
+    AceOutOfRange,
+}
+
+#[cfg(test)]
+static OWNER_DESCRIPTOR_FIXTURE: std::sync::OnceLock<
+    std::sync::Mutex<Option<OwnerDescriptorFixture>>,
+> = std::sync::OnceLock::new();
+
+#[cfg(test)]
+struct OwnerDescriptorFixtureGuard;
+
+#[cfg(test)]
+impl Drop for OwnerDescriptorFixtureGuard {
+    fn drop(&mut self) {
+        *OWNER_DESCRIPTOR_FIXTURE
+            .get_or_init(Default::default)
+            .lock()
+            .expect("owner descriptor fixture mutex poisoned") = None;
+    }
+}
+
+#[cfg(test)]
+fn install_owner_descriptor_fixture(
+    fixture: OwnerDescriptorFixture,
+) -> OwnerDescriptorFixtureGuard {
+    let mut slot = OWNER_DESCRIPTOR_FIXTURE
+        .get_or_init(Default::default)
+        .lock()
+        .expect("owner descriptor fixture mutex poisoned");
+    assert!(
+        slot.is_none(),
+        "owner descriptor tests require --test-threads=1"
+    );
+    *slot = Some(fixture);
+    OwnerDescriptorFixtureGuard
+}
+
+#[cfg(test)]
+fn take_owner_descriptor_fixture() -> Option<OwnerDescriptorFixture> {
+    OWNER_DESCRIPTOR_FIXTURE
+        .get_or_init(Default::default)
+        .lock()
+        .expect("owner descriptor fixture mutex poisoned")
+        .take()
+}
+
+fn verify_created_owner_only(handle: HANDLE, expected: &OwnerOnlySecurity) -> Result<()> {
+    inject_windows_create_failure(
+        WindowsCreateFailurePoint::SecurityVerification,
+        SafeFsOperation::VerifySecurityDescriptor,
+    )?;
+    #[cfg(test)]
+    if FORCE_DACL_VERIFY_FAILURE.swap(false, std::sync::atomic::Ordering::SeqCst) {
+        return Err(malformed_security());
+    }
+    verify_owner_only(handle, expected)
 }
 
 #[allow(clippy::arc_with_non_send_sync)] // Arc retains the HANDLE-bearing parent chain; it is not shared publicly.
@@ -1445,7 +1936,13 @@ fn create_directory_contract(
         SafeFsOperation::CreateDirectory
     };
     require_mutation(parent, operation)?;
-    require_inherited_permissions(permissions)?;
+    let security = match permissions {
+        CreatePermissions::OwnerOnly => Some(OwnerOnlySecurity::new(true)?),
+        CreatePermissions::Inherit => None,
+    };
+    let security_descriptor = security
+        .as_ref()
+        .map_or(null(), OwnerOnlySecurity::descriptor_ptr);
     let handle = nt_create_relative(
         parent.native.node.handle.raw(),
         name,
@@ -1454,7 +1951,7 @@ fn create_directory_contract(
         contract.disposition,
         contract.options,
         contract.attributes,
-        null(),
+        security_descriptor,
         operation,
     )?;
     let validated =
@@ -1475,6 +1972,9 @@ fn create_directory_contract(
                     kind: opened.kind,
                 });
             }
+            if let Some(expected) = &security {
+                verify_created_owner_only(handle.raw(), expected)?;
+            }
             inject_windows_create_failure(WindowsCreateFailurePoint::CaseProof, operation)?;
             let case_mode = query_case_mode(handle.raw())?;
             inject_windows_create_failure(WindowsCreateFailurePoint::SnapshotAssembly, operation)?;
@@ -1638,20 +2138,6 @@ fn collect_revalidation_proof(directory: &DirectoryAuthority) -> Result<Revalida
     })
 }
 
-fn filesystem_refusal<T>(operation: SafeFsOperation) -> Result<T> {
-    Err(SafeFsError::UnsupportedSecureFilesystem {
-        operation,
-        reason: SecureFilesystemReason::UnsupportedTarget,
-    })
-}
-
-fn mutation_refusal<T>(operation: SafeFsOperation) -> Result<T> {
-    Err(SafeFsError::UnsupportedAtomicPublish {
-        operation,
-        reason: AtomicPublishReason::PrimitiveUnavailable,
-    })
-}
-
 #[allow(clippy::arc_with_non_send_sync)] // Arc retains the HANDLE-bearing namespace chain; it is not shared publicly.
 pub(super) fn capture_absolute_directory(
     path: &Path,
@@ -1906,11 +2392,10 @@ pub(super) fn create_stage_dir_new(
     name: &ComponentName,
     permissions: CreatePermissions,
 ) -> Result<StageCapability> {
-    require_inherited_permissions(permissions)?;
     let directory = create_directory_contract(
         parent,
         name,
-        CreatePermissions::Inherit,
+        permissions,
         DirectoryAccess::Stage,
         contract_for_operation(OpenOperation::CreateStage),
     )?;
@@ -1939,7 +2424,13 @@ pub(super) fn create_file_new(
     permissions: CreatePermissions,
 ) -> Result<FileCapability> {
     require_mutation(parent, SafeFsOperation::CreateFile)?;
-    require_inherited_permissions(permissions)?;
+    let security = match permissions {
+        CreatePermissions::OwnerOnly => Some(OwnerOnlySecurity::new(false)?),
+        CreatePermissions::Inherit => None,
+    };
+    let security_descriptor = security
+        .as_ref()
+        .map_or(null(), OwnerOnlySecurity::descriptor_ptr);
     let contract = contract_for_operation(OpenOperation::CreateFile);
     let handle = nt_create_relative(
         parent.native.node.handle.raw(),
@@ -1949,7 +2440,7 @@ pub(super) fn create_file_new(
         contract.disposition,
         contract.options,
         contract.attributes,
-        null(),
+        security_descriptor,
         SafeFsOperation::CreateFile,
     )?;
     let validated =
@@ -1980,6 +2471,9 @@ pub(super) fn create_file_new(
                     kind: opened.kind,
                 });
             }
+            if let Some(expected) = &security {
+                verify_created_owner_only(handle.raw(), expected)?;
+            }
             Ok(opened)
         })();
     let opened = match validated {
@@ -2049,35 +2543,364 @@ pub(super) fn metadata_from_file(file: &NativeFile) -> Result<EntryMetadata> {
     )
 }
 
+fn rename_retained_noreplace(
+    native: &NativeDirectory,
+    parent: &DirectoryAuthority,
+    target: &ComponentName,
+) -> Result<()> {
+    require_mutation(parent, SafeFsOperation::RenameNoReplaceSameParent)?;
+    if matches!(
+        query_child_nofollow(parent, target)?,
+        ChildState::Present(_)
+    ) {
+        return Err(SafeFsError::AlreadyExists {
+            operation: SafeFsOperation::RenameNoReplaceSameParent,
+        });
+    }
+    if !native.delete_right {
+        return Err(raw_nt(
+            SafeFsOperation::RenameNoReplaceSameParent,
+            STATUS_ACCESS_DENIED,
+        ));
+    }
+    let buffer = RenameInformationBuffer::new(parent.native.node.handle.raw(), target)?;
+    let mut iosb = IO_STATUS_BLOCK::default();
+    // SAFETY: the retained DELETE source and parent handles plus the aligned,
+    // initialized variable-length buffer remain live for this synchronous call.
+    let status = unsafe {
+        NtSetInformationFile(
+            native.node.handle.raw(),
+            &mut iosb,
+            buffer.as_ptr(),
+            buffer.used,
+            FileRenameInformation,
+        )
+    };
+    if status < STATUS_SUCCESS {
+        return Err(map_rename_failure(
+            status,
+            true,
+            native.delete_right,
+            query_child_nofollow(parent, target),
+        ));
+    }
+    complete_nt(SafeFsOperation::RenameNoReplaceSameParent, status, &iosb)
+}
+
+fn verify_same_parent(expected: &DirectoryAuthority, actual: &DirectoryAuthority) -> Result<()> {
+    if expected.opened.identity == actual.opened.identity && expected.snapshot == actual.snapshot {
+        Ok(())
+    } else {
+        Err(SafeFsError::NamespaceChanged {
+            operation: SafeFsOperation::RenameNoReplaceSameParent,
+        })
+    }
+}
+
 pub(super) fn quarantine_stage(
-    _: StageCapability,
-    _: &DirectoryAuthority,
-    _: ComponentName,
+    stage: StageCapability,
+    parent: &DirectoryAuthority,
+    quarantine_name: ComponentName,
 ) -> Result<QuarantinedCapability> {
-    mutation_refusal(SafeFsOperation::QuarantineNoReplace)
+    let StageCapability {
+        parent: owned_parent,
+        directory,
+        original_name,
+        opened,
+    } = stage;
+    verify_same_parent(&owned_parent, parent)?;
+    revalidate_namespace(parent)?;
+    rename_retained_noreplace(&directory.native, parent, &quarantine_name)?;
+    Ok(QuarantinedCapability {
+        parent: owned_parent,
+        directory,
+        original_name,
+        quarantine_name,
+        opened,
+    })
 }
 
 pub(super) fn publish_stage_noreplace(
-    _: StageCapability,
-    _: &DirectoryAuthority,
-    _: ComponentName,
+    stage: StageCapability,
+    parent: &DirectoryAuthority,
+    destination: ComponentName,
 ) -> Result<()> {
-    mutation_refusal(SafeFsOperation::PublishNoReplace)
+    let StageCapability {
+        parent: owned_parent,
+        directory,
+        opened,
+        ..
+    } = stage;
+    verify_same_parent(&owned_parent, parent)?;
+    revalidate_namespace(parent)?;
+    if directory.opened.identity != opened.identity {
+        return Err(SafeFsError::IdentityChanged {
+            operation: SafeFsOperation::RenameNoReplaceSameParent,
+            expected: opened.identity,
+            actual: directory.opened.identity.clone(),
+        });
+    }
+    rename_retained_noreplace(&directory.native, parent, &destination)?;
+    drop(directory);
+    Ok(())
 }
 
+#[allow(clippy::arc_with_non_send_sync)] // Arc retains the HANDLE parent chain; capabilities never cross threads.
 pub(super) fn open_cleanup_child_nofollow(
-    _: &QuarantinedCapability,
-    _: &ComponentName,
+    quarantined: &QuarantinedCapability,
+    name: &ComponentName,
 ) -> Result<CleanupCapability> {
-    filesystem_refusal(SafeFsOperation::OpenCleanupEntry)
+    let parent = &quarantined.directory;
+    let metadata = match query_child_nofollow(parent, name)? {
+        ChildState::Absent => {
+            return Err(SafeFsError::NotFound {
+                operation: SafeFsOperation::OpenCleanupEntry,
+            })
+        }
+        ChildState::Present(metadata) => metadata,
+    };
+    let contract = contract_for_operation(match metadata.kind {
+        EntryKind::Directory => OpenOperation::CleanupDir,
+        EntryKind::SymlinkOrReparse => OpenOperation::CleanupReparse,
+        _ => OpenOperation::CleanupFile,
+    });
+    let handle = nt_create_relative(
+        parent.native.node.handle.raw(),
+        name,
+        parent.case_mode,
+        contract.desired,
+        contract.disposition,
+        contract.options,
+        contract.attributes,
+        null(),
+        SafeFsOperation::OpenCleanupEntry,
+    )?;
+    let filesystem =
+        parent
+            .opened
+            .filesystem
+            .as_ref()
+            .ok_or(SafeFsError::UnsupportedSecureFilesystem {
+                operation: SafeFsOperation::ProbeFilesystem,
+                reason: SecureFilesystemReason::FilesystemProbeUnavailable,
+            })?;
+    let opened = query_entry_metadata(handle.raw(), filesystem, SafeFsOperation::QueryMetadata)?;
+    if opened.identity != metadata.identity {
+        return Err(SafeFsError::IdentityChanged {
+            operation: SafeFsOperation::QueryMetadata,
+            expected: metadata.identity,
+            actual: opened.identity,
+        });
+    }
+    if opened.kind != metadata.kind {
+        return Err(SafeFsError::UnsupportedEntryType {
+            operation: SafeFsOperation::OpenCleanupEntry,
+            kind: opened.kind,
+        });
+    }
+    if opened.kind == EntryKind::Directory {
+        let duplicated_parent = duplicate_directory(parent)?;
+        let child_case = query_case_mode(handle.raw())?;
+        let child_snapshot = append_snapshot(&parent.snapshot, name.clone(), &opened, child_case)?;
+        let node = Arc::new(DirectoryNode {
+            handle,
+            parent: Some(Arc::clone(&parent.native.node)),
+            name: Some(name.clone()),
+            case_mode: child_case,
+            metadata: opened.clone(),
+            volume: parent.native.node.volume.clone(),
+        });
+        let directory = DirectoryAuthority {
+            anchor: Arc::clone(&parent.anchor),
+            native: NativeDirectory {
+                node,
+                access: DirectoryAccess::MutateChildren,
+                delete_right: true,
+            },
+            access: DirectoryAccess::MutateChildren,
+            opened: opened.clone(),
+            case_mode: child_case,
+            snapshot: child_snapshot,
+        };
+        Ok(CleanupCapability::Directory(Box::new(
+            QuarantinedCapability {
+                parent: duplicated_parent,
+                directory,
+                original_name: name.clone(),
+                quarantine_name: name.clone(),
+                opened,
+            },
+        )))
+    } else {
+        Ok(CleanupCapability::Entry(Box::new(CleanupEntry {
+            parent: duplicate_directory(parent)?,
+            native: NativeFile {
+                handle,
+                opened: opened.clone(),
+                access: FileAccess::Read,
+                delete_right: true,
+            },
+            name: name.clone(),
+            opened,
+            access: CleanupAccess::Delete,
+        })))
+    }
+}
+
+#[cfg(test)]
+type BeforeRetainedDeleteHook =
+    Arc<dyn Fn(HANDLE, &DirectoryAuthority, &ComponentName) -> Result<()> + Send + Sync>;
+
+#[cfg(test)]
+static BEFORE_RETAINED_DELETE_HOOK: std::sync::OnceLock<
+    std::sync::Mutex<Option<BeforeRetainedDeleteHook>>,
+> = std::sync::OnceLock::new();
+
+#[cfg(test)]
+struct BeforeRetainedDeleteHookGuard;
+
+#[cfg(test)]
+impl Drop for BeforeRetainedDeleteHookGuard {
+    fn drop(&mut self) {
+        *BEFORE_RETAINED_DELETE_HOOK
+            .get_or_init(Default::default)
+            .lock()
+            .expect("retained-delete hook mutex poisoned") = None;
+    }
+}
+
+#[cfg(test)]
+fn install_before_retained_delete_hook(
+    hook: BeforeRetainedDeleteHook,
+) -> BeforeRetainedDeleteHookGuard {
+    let mut slot = BEFORE_RETAINED_DELETE_HOOK
+        .get_or_init(Default::default)
+        .lock()
+        .expect("retained-delete hook mutex poisoned");
+    assert!(
+        slot.is_none(),
+        "retained-delete tests require --test-threads=1"
+    );
+    *slot = Some(hook);
+    BeforeRetainedDeleteHookGuard
+}
+
+fn run_before_retained_delete_hook(
+    handle: HANDLE,
+    parent: &DirectoryAuthority,
+    name: &ComponentName,
+) -> Result<()> {
+    #[cfg(test)]
+    {
+        let hook = BEFORE_RETAINED_DELETE_HOOK
+            .get_or_init(Default::default)
+            .lock()
+            .expect("retained-delete hook mutex poisoned")
+            .clone();
+        if let Some(hook) = hook {
+            return hook(handle, parent, name);
+        }
+    }
+    let _ = (handle, parent, name);
+    Ok(())
+}
+
+fn dispose_retained(
+    mut native: NativeFile,
+    parent: &DirectoryAuthority,
+    name: &ComponentName,
+    expected_kind: EntryKind,
+    operation: SafeFsOperation,
+) -> Result<()> {
+    if !native.delete_right {
+        return Err(SafeFsError::Os {
+            operation,
+            raw: RawOsError::Win32(windows_sys::Win32::Foundation::ERROR_ACCESS_DENIED),
+        });
+    }
+    if native.opened.kind != expected_kind {
+        return Err(SafeFsError::UnsupportedEntryType {
+            operation,
+            kind: native.opened.kind,
+        });
+    }
+    run_before_retained_delete_hook(native.handle.raw(), parent, name)?;
+    mark_delete_handle(native.handle.raw(), operation)?;
+    native.delete_right = false;
+    drop(native);
+    Ok(())
 }
 
-pub(super) fn delete_quarantined_entry(_: CleanupCapability) -> Result<()> {
-    filesystem_refusal(SafeFsOperation::DeleteQuarantinedEntry)
+pub(super) fn delete_quarantined_entry(cleanup: CleanupCapability) -> Result<()> {
+    match cleanup {
+        CleanupCapability::Entry(entry) => {
+            let CleanupEntry {
+                parent,
+                native,
+                name,
+                opened,
+                access: CleanupAccess::Delete,
+            } = *entry;
+            if native.opened.identity != opened.identity {
+                return Err(SafeFsError::IdentityChanged {
+                    operation: SafeFsOperation::DeleteQuarantinedEntry,
+                    expected: opened.identity,
+                    actual: native.opened.identity,
+                });
+            }
+            dispose_retained(
+                native,
+                &parent,
+                &name,
+                opened.kind,
+                SafeFsOperation::DeleteQuarantinedEntry,
+            )
+        }
+        CleanupCapability::Directory(_) => Err(SafeFsError::UnsupportedEntryType {
+            operation: SafeFsOperation::DeleteQuarantinedEntry,
+            kind: EntryKind::Directory,
+        }),
+    }
 }
 
-pub(super) fn delete_quarantined_empty_directory(_: QuarantinedCapability) -> Result<()> {
-    filesystem_refusal(SafeFsOperation::DeleteQuarantinedEmptyDirectory)
+pub(super) fn delete_quarantined_empty_directory(quarantined: QuarantinedCapability) -> Result<()> {
+    let QuarantinedCapability {
+        parent,
+        directory,
+        quarantine_name,
+        opened,
+        ..
+    } = quarantined;
+    if directory.opened.identity != opened.identity || !directory.native.delete_right {
+        return Err(SafeFsError::IdentityChanged {
+            operation: SafeFsOperation::DeleteQuarantinedEmptyDirectory,
+            expected: opened.identity,
+            actual: directory.opened.identity,
+        });
+    }
+    let native = NativeFile {
+        handle: Arc::try_unwrap(directory.native.node)
+            .map_err(|node| {
+                SafeFsError::io(
+                    SafeFsOperation::DeleteQuarantinedEmptyDirectory,
+                    io::Error::other(format!(
+                        "directory handle still shared: {}",
+                        Arc::strong_count(&node)
+                    )),
+                )
+            })?
+            .handle,
+        opened: directory.opened,
+        access: FileAccess::Read,
+        delete_right: true,
+    };
+    dispose_retained(
+        native,
+        &parent,
+        &quarantine_name,
+        EntryKind::Directory,
+        SafeFsOperation::DeleteQuarantinedEmptyDirectory,
+    )
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
@@ -2088,7 +2911,6 @@ enum WindowsCreateFailurePoint {
     CaseProof,
     SnapshotAssembly,
     ParentDuplicate,
-    #[allow(dead_code)] // Task 7A test-only removes this when it constructs the variant.
     SecurityVerification,
 }
 
@@ -2174,6 +2996,7 @@ mod tests {
     use super::*;
     use std::fs;
     use std::path::PathBuf;
+    use std::process::Command;
     use std::sync::atomic::{AtomicU64, Ordering};
 
     struct TestDir(PathBuf);
@@ -2210,6 +3033,22 @@ mod tests {
             .expect("capture fixture root")
     }
 
+    fn present_for_test() -> ChildState {
+        ChildState::Present(EntryMetadata {
+            identity: StableIdentity::Windows {
+                volume_serial: 7,
+                file_id: [3; 16],
+            },
+            kind: EntryKind::RegularFile,
+            len: 0,
+            link_count: 1,
+            filesystem: Some(LocalFilesystemSnapshot::Windows {
+                volume_guid: vec![1],
+                serial: 7,
+            }),
+        })
+    }
+
     #[test]
     fn remote_protocol_query_buffer_initializes_required_header() {
         let buffer = remote_protocol_query_buffer(SafeFsOperation::ProbeVolume).unwrap();
@@ -2268,6 +3107,364 @@ mod tests {
         assert_eq!(enumerate(&b).unwrap(), vec![name("data")]);
     }
 
+    #[test]
+    fn owner_only_file_directory_stage_succeed_and_rollback() {
+        let temp = TestDir::new("owner-only");
+        let authority = root(&temp);
+
+        let file = create_file_new(&authority, &name("file"), CreatePermissions::OwnerOnly)
+            .expect("owner-only file creation succeeds");
+        drop(file);
+        let directory = create_dir_new(
+            &authority,
+            &name("directory"),
+            CreatePermissions::OwnerOnly,
+            DirectoryAccess::MutateChildren,
+        )
+        .expect("owner-only directory creation succeeds");
+        drop(directory);
+        let stage = create_stage_dir_new(&authority, &name("stage"), CreatePermissions::OwnerOnly)
+            .expect("owner-only stage creation succeeds");
+        drop(stage);
+        for value in ["file", "directory", "stage"] {
+            assert!(matches!(
+                query_child_nofollow(&authority, &name(value)).unwrap(),
+                ChildState::Present(_)
+            ));
+        }
+
+        force_next_owner_verification_failure();
+        assert!(matches!(
+            create_file_new(
+                &authority,
+                &name("rollback-file"),
+                CreatePermissions::OwnerOnly
+            ),
+            Err(SafeFsError::InvalidNativeBuffer {
+                operation: SafeFsOperation::VerifySecurityDescriptor,
+                reason: NativeBufferReason::SecurityDescriptorMalformed,
+            })
+        ));
+        force_next_owner_verification_failure();
+        assert!(matches!(
+            create_dir_new(
+                &authority,
+                &name("rollback-directory"),
+                CreatePermissions::OwnerOnly,
+                DirectoryAccess::MutateChildren,
+            ),
+            Err(SafeFsError::InvalidNativeBuffer {
+                operation: SafeFsOperation::VerifySecurityDescriptor,
+                reason: NativeBufferReason::SecurityDescriptorMalformed,
+            })
+        ));
+        force_next_owner_verification_failure();
+        assert!(matches!(
+            create_stage_dir_new(
+                &authority,
+                &name("rollback-stage"),
+                CreatePermissions::OwnerOnly,
+            ),
+            Err(SafeFsError::InvalidNativeBuffer {
+                operation: SafeFsOperation::VerifySecurityDescriptor,
+                reason: NativeBufferReason::SecurityDescriptorMalformed,
+            })
+        ));
+        for value in ["rollback-file", "rollback-directory", "rollback-stage"] {
+            assert!(matches!(
+                query_child_nofollow(&authority, &name(value)).unwrap(),
+                ChildState::Absent
+            ));
+        }
+    }
+
+    #[test]
+    fn windows_post_create_security_failure_rolls_back_same_handle() {
+        let temp = TestDir::new("security-rollback");
+        let authority = root(&temp);
+        let _failure =
+            install_windows_create_failure(WindowsCreateFailurePoint::SecurityVerification);
+        assert!(matches!(
+            create_file_new(&authority, &name("leaf"), CreatePermissions::OwnerOnly),
+            Err(SafeFsError::Io {
+                operation: SafeFsOperation::VerifySecurityDescriptor,
+                ..
+            })
+        ));
+        assert!(matches!(
+            query_child_nofollow(&authority, &name("leaf")).unwrap(),
+            ChildState::Absent
+        ));
+    }
+
+    fn assert_owner_descriptor_fixture_rejected(fixture: OwnerDescriptorFixture, leaf: &str) {
+        let temp = TestDir::new(leaf);
+        let authority = root(&temp);
+        let _fixture = install_owner_descriptor_fixture(fixture);
+        assert!(matches!(
+            create_file_new(&authority, &name(leaf), CreatePermissions::OwnerOnly),
+            Err(SafeFsError::InvalidNativeBuffer {
+                operation: SafeFsOperation::VerifySecurityDescriptor,
+                reason: NativeBufferReason::SecurityDescriptorMalformed,
+            })
+        ));
+        assert!(matches!(
+            query_child_nofollow(&authority, &name(leaf)).unwrap(),
+            ChildState::Absent
+        ));
+    }
+
+    #[test]
+    fn owner_only_dacl_rejects_wrong_ace_type() {
+        assert_owner_descriptor_fixture_rejected(
+            OwnerDescriptorFixture::WrongAceType,
+            "wrong-ace-type",
+        );
+    }
+
+    #[test]
+    fn owner_only_dacl_rejects_undersized_ace_and_out_of_range_acl_fields() {
+        for (fixture, leaf) in [
+            (OwnerDescriptorFixture::UndersizedAce, "undersized-ace"),
+            (OwnerDescriptorFixture::DaclOutOfRange, "dacl-out-of-range"),
+            (
+                OwnerDescriptorFixture::AclBytesOutOfRange,
+                "acl-bytes-out-of-range",
+            ),
+            (OwnerDescriptorFixture::WrongAceCount, "wrong-ace-count"),
+            (OwnerDescriptorFixture::AceOutOfRange, "ace-out-of-range"),
+        ] {
+            assert_owner_descriptor_fixture_rejected(fixture, leaf);
+        }
+    }
+
+    #[test]
+    fn owner_only_dacl_rejects_oversized_sid() {
+        assert_owner_descriptor_fixture_rejected(
+            OwnerDescriptorFixture::OversizedSid,
+            "oversized-sid",
+        );
+    }
+
+    #[test]
+    fn owner_only_dacl_rejects_invalid_sid() {
+        assert_owner_descriptor_fixture_rejected(OwnerDescriptorFixture::InvalidSid, "invalid-sid");
+    }
+
+    #[test]
+    fn owner_only_dacl_rejects_null_or_invalid_owner() {
+        assert_owner_descriptor_fixture_rejected(OwnerDescriptorFixture::NullOwner, "null-owner");
+        assert_owner_descriptor_fixture_rejected(
+            OwnerDescriptorFixture::InvalidOwner,
+            "invalid-owner",
+        );
+    }
+
+    #[test]
+    fn quarantine_and_publish_success_do_not_self_conflict() {
+        let quarantine_temp = TestDir::new("quarantine-success");
+        let authority = root(&quarantine_temp);
+        let stage =
+            create_stage_dir_new(&authority, &name("stage"), CreatePermissions::Inherit).unwrap();
+        let quarantined = quarantine_stage(stage, &authority, name("quarantine"))
+            .expect("retained quarantine rename succeeds");
+        drop(quarantined);
+        assert!(!quarantine_temp.path().join("stage").exists());
+        assert!(quarantine_temp.path().join("quarantine").is_dir());
+
+        let publish_temp = TestDir::new("publish-success");
+        let authority = root(&publish_temp);
+        let stage =
+            create_stage_dir_new(&authority, &name("stage"), CreatePermissions::Inherit).unwrap();
+        publish_stage_noreplace(stage, &authority, name("destination"))
+            .expect("retained publish rename succeeds");
+        assert!(!publish_temp.path().join("stage").exists());
+        assert!(publish_temp.path().join("destination").is_dir());
+    }
+
+    #[test]
+    fn rename_never_replaces_any_target_kind() {
+        assert!(matches!(
+            map_rename_failure(STATUS_ACCESS_DENIED, true, true, Ok(present_for_test())),
+            SafeFsError::AlreadyExists { .. }
+        ));
+        assert!(matches!(
+            map_rename_failure(STATUS_ACCESS_DENIED, true, true, Ok(ChildState::Absent)),
+            SafeFsError::Os {
+                raw: RawOsError::NtStatus {
+                    status: STATUS_ACCESS_DENIED,
+                    ..
+                },
+                ..
+            }
+        ));
+        for kind in ["file", "empty-dir", "nonempty-dir", "reparse"] {
+            let temp = TestDir::new(kind);
+            let target = temp.path().join("target");
+            let external = temp.path().join("external");
+            match kind {
+                "file" => fs::write(&target, b"keep-file").unwrap(),
+                "empty-dir" => fs::create_dir(&target).unwrap(),
+                "nonempty-dir" => {
+                    fs::create_dir(&target).unwrap();
+                    fs::write(target.join("keep"), b"tree").unwrap();
+                }
+                "reparse" => {
+                    fs::create_dir(&external).unwrap();
+                    fs::write(external.join("keep"), b"outside").unwrap();
+                    let output = Command::new("cmd")
+                        .args(["/C", "mklink", "/J"])
+                        .arg(&target)
+                        .arg(&external)
+                        .output()
+                        .unwrap();
+                    assert!(
+                        output.status.success(),
+                        "mklink failed: {}",
+                        String::from_utf8_lossy(&output.stderr)
+                    );
+                }
+                _ => unreachable!(),
+            }
+            let authority = root(&temp);
+            let before = match query_child_nofollow(&authority, &name("target")).unwrap() {
+                ChildState::Present(value) => value,
+                ChildState::Absent => panic!("collision target absent"),
+            };
+            let stage =
+                create_stage_dir_new(&authority, &name("stage"), CreatePermissions::Inherit)
+                    .unwrap();
+            assert!(matches!(
+                publish_stage_noreplace(stage, &authority, name("target")),
+                Err(SafeFsError::AlreadyExists { .. })
+            ));
+            let after = match query_child_nofollow(&authority, &name("target")).unwrap() {
+                ChildState::Present(value) => value,
+                ChildState::Absent => panic!("collision target removed"),
+            };
+            assert_eq!(after.identity, before.identity);
+            match kind {
+                "file" => assert_eq!(fs::read(&target).unwrap(), b"keep-file"),
+                "nonempty-dir" => assert_eq!(fs::read(target.join("keep")).unwrap(), b"tree"),
+                "reparse" => assert_eq!(fs::read(external.join("keep")).unwrap(), b"outside"),
+                _ => assert!(target.is_dir()),
+            }
+        }
+    }
+
+    #[test]
+    fn cleanup_quarantined_tree_deletes_nested_reparse_without_traversal() {
+        let temp = TestDir::new("cleanup-tree");
+        let external = temp.path().join("external");
+        fs::create_dir(&external).unwrap();
+        fs::write(external.join("keep"), b"outside-bytes").unwrap();
+        let authority = root(&temp);
+        let stage =
+            create_stage_dir_new(&authority, &name("stage"), CreatePermissions::Inherit).unwrap();
+        let nested = create_dir_new(
+            stage.directory(),
+            &name("nested"),
+            CreatePermissions::Inherit,
+            DirectoryAccess::MutateChildren,
+        )
+        .unwrap();
+        let mut file = create_file_new(&nested, &name("data"), CreatePermissions::Inherit).unwrap();
+        file.write_all(b"inside").unwrap();
+        drop(file);
+        drop(nested);
+        let output = Command::new("cmd")
+            .args(["/C", "mklink", "/J"])
+            .arg(temp.path().join("stage").join("nested").join("link"))
+            .arg(&external)
+            .output()
+            .unwrap();
+        assert!(
+            output.status.success(),
+            "mklink failed: {}",
+            String::from_utf8_lossy(&output.stderr)
+        );
+        let quarantine = quarantine_stage(stage, &authority, name("quarantine")).unwrap();
+        super::super::cleanup_quarantined_tree(quarantine)
+            .expect("common recursive cleanup succeeds");
+        assert!(matches!(
+            query_child_nofollow(&authority, &name("quarantine")).unwrap(),
+            ChildState::Absent
+        ));
+        assert_eq!(fs::read(external.join("keep")).unwrap(), b"outside-bytes");
+    }
+
+    #[test]
+    fn retained_delete_is_safe_when_real_name_rebinds_or_is_blocked() {
+        use std::sync::atomic::{AtomicBool, Ordering};
+
+        let temp = TestDir::new("delete-rebound");
+        let authority = root(&temp);
+        let stage =
+            create_stage_dir_new(&authority, &name("stage"), CreatePermissions::Inherit).unwrap();
+        let mut file =
+            create_file_new(stage.directory(), &name("leaf"), CreatePermissions::Inherit).unwrap();
+        file.write_all(b"original").unwrap();
+        drop(file);
+        let quarantine = quarantine_stage(stage, &authority, name("quarantine")).unwrap();
+        let cleanup = open_cleanup_child_nofollow(&quarantine, &name("leaf")).unwrap();
+        let expected_source = match &cleanup {
+            CleanupCapability::Entry(entry) => entry.native.handle.raw() as usize,
+            CleanupCapability::Directory(_) => panic!("leaf opened as a directory"),
+        };
+        let quarantine_path = temp.path().join("quarantine");
+        let rebound = Arc::new(AtomicBool::new(false));
+        let hook_rebound = Arc::clone(&rebound);
+        let _guard = install_before_retained_delete_hook(Arc::new(
+            move |source, parent, _old_name| {
+                if source as usize != expected_source {
+                    return Ok(());
+                }
+                let buffer = RenameInformationBuffer::new(
+                    parent.native.node.handle.raw(),
+                    &name("moved-original"),
+                )?;
+                let mut iosb = IO_STATUS_BLOCK::default();
+                // SAFETY: source is the retained DELETE handle and all inputs
+                // remain live for this synchronous test-only rename.
+                let status = unsafe {
+                    NtSetInformationFile(
+                        source,
+                        &mut iosb,
+                        buffer.as_ptr(),
+                        buffer.used,
+                        FileRenameInformation,
+                    )
+                };
+                if status == STATUS_SUCCESS {
+                    complete_nt(SafeFsOperation::RenameNoReplaceSameParent, status, &iosb)?;
+                    fs::write(quarantine_path.join("leaf"), b"replacement")
+                        .map_err(|error| SafeFsError::io(SafeFsOperation::CreateFile, error))?;
+                    hook_rebound.store(true, Ordering::SeqCst);
+                } else {
+                    assert_eq!(
+                        status, STATUS_SHARING_VIOLATION,
+                        "Windows may reject the simulated same-handle rename, but no other failure is expected"
+                    );
+                }
+                Ok(())
+            },
+        ));
+        delete_quarantined_entry(cleanup).unwrap();
+        if rebound.load(Ordering::SeqCst) {
+            assert_eq!(
+                fs::read(temp.path().join("quarantine").join("leaf")).unwrap(),
+                b"replacement"
+            );
+        } else {
+            assert!(!temp.path().join("quarantine").join("leaf").exists());
+        }
+        assert!(!temp
+            .path()
+            .join("quarantine")
+            .join("moved-original")
+            .exists());
+    }
+
     fn assert_file_create_failure_rolls_back(point: WindowsCreateFailurePoint, label: &str) {
         let temp = TestDir::new(label);
         let authority = root(&temp);
diff --git a/crates/opentake-project/tests/archive.rs b/crates/opentake-project/tests/archive.rs
index 7dfb2be6..835524cc 100644
--- a/crates/opentake-project/tests/archive.rs
+++ b/crates/opentake-project/tests/archive.rs
@@ -23,6 +23,8 @@ fn entry(id: &str, name: &str, kind: ClipType, source: MediaSource) -> MediaMani
         source_height: None,
         source_fps: None,
         has_audio: None,
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/tests/compound_roundtrip.rs b/crates/opentake-project/tests/compound_roundtrip.rs
new file mode 100644
index 00000000..75c0c849
--- /dev/null
+++ b/crates/opentake-project/tests/compound_roundtrip.rs
@@ -0,0 +1,116 @@
+//! Persistence and compatibility boundaries for editable compound clips.
+
+mod common;
+
+use opentake_domain::{Clip, ClipType, NestedSequence, Timeline, Track};
+use opentake_project::{Project, ProjectError};
+
+use common::{write_file, TempDir};
+
+fn nested_timeline() -> Timeline {
+    let mut child = Timeline::new();
+    let mut child_track = Track::new("child-track", ClipType::Video);
+    child_track
+        .clips
+        .push(Clip::new("child-clip", "asset-a", 2, 12));
+    child.tracks.push(child_track);
+
+    let mut root = Timeline::new();
+    root.nested_sequences
+        .push(NestedSequence::new("sequence-a", "Scene A", child));
+    let mut root_track = Track::new("root-track", ClipType::Video);
+    root_track
+        .clips
+        .push(Clip::new_nested("compound-a", "sequence-a", 10, 20));
+    root.tracks.push(root_track);
+    root
+}
+
+#[test]
+fn compound_clip_roundtrips_nested_timeline() {
+    let temp = TempDir::new("compound-roundtrip");
+    let bundle = temp.child("Compound.opentake");
+    let mut project = Project::new(&bundle);
+    project.timeline = nested_timeline();
+
+    project.save().expect("save nested timeline");
+    let reopened = Project::open(&bundle).expect("open nested timeline");
+
+    assert_eq!(reopened.timeline, project.timeline);
+    assert_eq!(
+        reopened.timeline.tracks[0].clips[0]
+            .nested_sequence_id
+            .as_deref(),
+        Some("sequence-a")
+    );
+    reopened
+        .timeline
+        .validate_nested_sequences()
+        .expect("reopened graph stays valid");
+}
+
+#[test]
+fn nested_future_fields_make_project_read_only() {
+    let temp = TempDir::new("compound-future-field");
+    let bundle = temp.child("Future.opentake");
+    std::fs::create_dir_all(&bundle).unwrap();
+    write_file(
+        &bundle.join("project.json"),
+        br#"{
+          "nestedSequences": [{
+            "id": "sequence-a",
+            "name": "A",
+            "timeline": {
+              "tracks": [{
+                "id": "child-track",
+                "type": "video",
+                "futureTrackFlag": true,
+                "clips": []
+              }]
+            }
+          }],
+          "tracks": []
+        }"#,
+    );
+
+    let project = Project::open(&bundle).expect("unknown field opens read-only");
+    assert!(project.compatibility().is_read_only());
+    assert!(project.compatibility().blockers().iter().any(|blocker| {
+        blocker == "project.json:nestedSequences.0.timeline.tracks.0.futureTrackFlag"
+    }));
+}
+
+#[test]
+fn recursive_nested_graph_fails_open_and_save() {
+    let temp = TempDir::new("compound-cycle");
+    let bundle = temp.child("Cycle.opentake");
+    let mut a = Timeline::new();
+    let mut a_track = Track::new("a-track", ClipType::Video);
+    a_track.clips.push(Clip::new_nested("a-to-b", "b", 0, 10));
+    a.tracks.push(a_track);
+    let mut b = Timeline::new();
+    let mut b_track = Track::new("b-track", ClipType::Video);
+    b_track.clips.push(Clip::new_nested("b-to-a", "a", 0, 10));
+    b.tracks.push(b_track);
+
+    let mut project = Project::new(&bundle);
+    project.timeline.nested_sequences = vec![
+        NestedSequence::new("a", "A", a),
+        NestedSequence::new("b", "B", b),
+    ];
+    let error = project.save().expect_err("cycle must not be persisted");
+    assert!(matches!(error, ProjectError::InvalidTimeline { .. }));
+    assert!(
+        !bundle.exists(),
+        "failed preflight must not create a bundle"
+    );
+
+    std::fs::create_dir_all(&bundle).unwrap();
+    write_file(
+        &bundle.join("project.json"),
+        serde_json::to_string(&project.timeline).unwrap().as_bytes(),
+    );
+    let error = Project::open(&bundle).expect_err("cycle must fail open");
+    assert!(matches!(error, ProjectError::InvalidTimeline { .. }));
+    assert!(error.to_string().contains("a -> b -> a"));
+}
diff --git a/crates/opentake-project/tests/lut_storage.rs b/crates/opentake-project/tests/lut_storage.rs
new file mode 100644
index 00000000..672d8a82
--- /dev/null
+++ b/crates/opentake-project/tests/lut_storage.rs
@@ -0,0 +1,36 @@
+#[allow(dead_code)]
+mod common;
+
+use common::TempDir;
+use opentake_project::{Project, ProjectRoot};
+
+#[test]
+fn managed_lut_is_bounded_nofollow_and_carried_by_complete_save_as() {
+    let temp = TempDir::new("lut-storage");
+    let source = temp.child("Source.opentake");
+    Project::new(&source).save().expect("create source bundle");
+    let source_root = ProjectRoot::open(&source).expect("retain source root");
+    let name = format!("{}.cube", "0123456789abcdef".repeat(4));
+    let bytes = b"LUT_3D_SIZE 17\n# acceptance bytes\n";
+    source_root
+        .write_lut_atomic(&name, bytes)
+        .expect("publish managed LUT");
+    assert_eq!(
+        source_root.read_lut(&name, 4096).unwrap().as_deref(),
+        Some(bytes.as_slice())
+    );
+    assert!(
+        source_root.read_lut(&name, 4).is_err(),
+        "read cap is enforced"
+    );
+
+    let destination = temp.child("Destination.opentake");
+    let destination_root = Project::new(&destination)
+        .publish_complete_to(&destination, Some(&source_root))
+        .expect("complete Save As");
+    assert_eq!(
+        destination_root.read_lut(&name, 4096).unwrap().as_deref(),
+        Some(bytes.as_slice()),
+        "nested media/luts asset must travel with Save As"
+    );
+}
diff --git a/crates/opentake-project/tests/roundtrip.rs b/crates/opentake-project/tests/roundtrip.rs
index 9dc25d92..4154f946 100644
--- a/crates/opentake-project/tests/roundtrip.rs
+++ b/crates/opentake-project/tests/roundtrip.rs
@@ -55,6 +55,8 @@ fn sample_project(bundle: &Path) -> Project {
         source_height: Some(2160),
         source_fps: Some(24.0),
         has_audio: Some(true),
+        color: None,
+        proxy: None,
         folder_id: Some("folder-1".into()),
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
@@ -72,6 +74,8 @@ fn sample_project(bundle: &Path) -> Project {
         source_height: None,
         source_fps: None,
         has_audio: None,
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/crates/opentake-project/tests/schema_compat.rs b/crates/opentake-project/tests/schema_compat.rs
index d71d8ff4..a6230ae5 100644
--- a/crates/opentake-project/tests/schema_compat.rs
+++ b/crates/opentake-project/tests/schema_compat.rs
@@ -40,6 +40,20 @@ fn write_known_bundle(bundle: &Path) {
                             "interpolationOut": "smooth"
                         }]
                     },
+                    "loudnessNormalization": {
+                        "targetLufs": -16.0,
+                        "truePeakCeilingDbtp": -1.0,
+                        "inputIntegratedLufs": -24.0,
+                        "inputTruePeakDbtp": -12.0,
+                        "gainDb": 8.0,
+                        "outputIntegratedLufs": -16.0,
+                        "outputTruePeakDbtp": -2.0
+                    },
+                    "audioDenoise": {
+                        "mode": "voice",
+                        "strength": 0.8,
+                        "previewEnabled": true
+                    },
                     "effects": [{"name": "blur", "params": {}, "enabled": true}],
                     "masks": [{
                         "shape": {"kind": "circle", "center": {"x": 0.5, "y": 0.5}, "radius": {"x": 0.5, "y": 0.5}},
diff --git a/crates/opentake-project/tests/upstream_compat.rs b/crates/opentake-project/tests/upstream_compat.rs
index 9ecd57c8..878ce2d2 100644
--- a/crates/opentake-project/tests/upstream_compat.rs
+++ b/crates/opentake-project/tests/upstream_compat.rs
@@ -12,7 +12,7 @@
 
 mod common;
 
-use opentake_domain::{ClipType, MediaSource};
+use opentake_domain::{ClipType, MediaManifest, MediaSource};
 use opentake_project::{Project, ProjectError};
 use serde_json::{json, Value};
 
@@ -241,6 +241,31 @@ fn applies_clip_defaults_for_omitted_fields() {
     assert_eq!(clip_a.end_frame(), 90);
     // source_frames_consumed = round(90 * 2.0) = 180.
     assert_eq!(clip_a.source_frames_consumed(), 180);
+
+    // A missing persisted version is the legacy schema (1), even though a
+    // newly constructed manifest starts at the current schema (2). Explicit
+    // persisted versions must never be overwritten by the compatibility path.
+    assert_eq!(project.manifest.version, 1);
+    assert_eq!(MediaManifest::default().version, 2);
+    let explicit: MediaManifest = serde_json::from_value(json!({
+        "version": 2,
+        "entries": [],
+        "folders": []
+    }))
+    .unwrap();
+    assert_eq!(explicit.version, 2);
+
+    // Persisting the upgraded representation and opening it again must keep
+    // both the decoded defaults and the legacy manifest version exactly.
+    project.save().unwrap();
+    let reopened = Project::open(&bundle).unwrap();
+    assert_eq!(reopened.timeline, project.timeline);
+    assert_eq!(reopened.manifest, project.manifest);
+    let reopened_clip = &reopened.timeline.tracks[0].clips[0];
+    assert_eq!(reopened_clip.trim_end_frame, 0);
+    assert_eq!(reopened_clip.opacity, 1.0);
+    assert!(reopened_clip.opacity_track.is_none());
+    assert!(reopened_clip.link_group_id.is_none());
 }
 
 #[test]
@@ -309,7 +334,10 @@ fn parses_manifest_with_missing_version_and_tagged_sources() {
 fn migrates_generation_log_legacy_cost_and_version() {
     let (_tmp, bundle) = make_upstream_bundle("compat-genlog");
     let project = Project::open(&bundle).unwrap();
-    let log = project.generation_log.expect("generation log present");
+    let log = project
+        .generation_log
+        .as_ref()
+        .expect("generation log present");
 
     // Missing top-level version -> 1.
     assert_eq!(log.version, 1);
@@ -330,6 +358,18 @@ fn migrates_generation_log_legacy_cost_and_version() {
     assert!(modern.created_at.is_none());
 
     assert_eq!(log.total_credits(), 342);
+
+    // The generated fallback id is synthesized only once. Saving and
+    // reopening must retain the migrated version, costs, and stable identity.
+    let expected_log = log.clone();
+    project.save().unwrap();
+    let reopened = Project::open(&bundle).unwrap();
+    assert_eq!(reopened.generation_log.as_ref(), Some(&expected_log));
+    let reopened_log = reopened.generation_log.as_ref().unwrap();
+    assert_eq!(reopened_log.version, 1);
+    assert_eq!(reopened_log.entries[0].cost_credits, Some(42));
+    assert_eq!(reopened_log.entries[1].id, modern.id);
+    assert_eq!(reopened_log.total_credits(), 342);
 }
 
 #[test]
diff --git a/crates/opentake-render/Cargo.toml b/crates/opentake-render/Cargo.toml
index 4da54ba1..828fab9a 100644
--- a/crates/opentake-render/Cargo.toml
+++ b/crates/opentake-render/Cargo.toml
@@ -17,6 +17,7 @@ thiserror = "2"
 wgpu = { version = "23", default-features = false, features = ["wgsl", "metal"] }
 # POD uniforms uploaded to the GPU (mat3x2 / crop_uv / opacity / flags).
 bytemuck = { version = "1", features = ["derive"] }
+half = "2"
 # Block on wgpu's async device/queue/map calls from synchronous render code.
 pollster = "0.4"
 # Text shaping + layout + glyph rasterization for timeline text clips (upstream
@@ -28,3 +29,6 @@ cosmic-text = { version = "0.12", default-features = false, features = ["std", "
 [dev-dependencies]
 # PNG read-back round-trip checks in the GPU smoke test (offline, no assets).
 image = { version = "0.25", default-features = false, features = ["png"] }
+serde_json = { workspace = true }
+opentake-media = { workspace = true }
+opentake-ops = { workspace = true }
diff --git a/crates/opentake-render/src/gpu/compositor.rs b/crates/opentake-render/src/gpu/compositor.rs
index 7790111d..edd5de1c 100644
--- a/crates/opentake-render/src/gpu/compositor.rs
+++ b/crates/opentake-render/src/gpu/compositor.rs
@@ -9,39 +9,55 @@ use std::rc::Rc;
 
 use bytemuck::{Pod, Zeroable};
 
-use opentake_domain::{ColorGrade, LiftGammaGain, MaskShape};
+use opentake_domain::{
+    validate_effect_chain, ColorGrade, LiftGammaGain, LutReference, MaskShape, MAX_EFFECTS_PER_CLIP,
+};
 
-use crate::gpu::texture::GpuTexture;
+use crate::gpu::texture::{GpuLutTexture, GpuTexture};
 use crate::gpu::RenderError;
 use crate::plan::{FramePlan, LayerDraw, RenderSize, TextureSource};
 use crate::source::DecodedFrame;
+use opentake_domain::{MAX_MASKS_PER_CLIP, MAX_POLYGON_MASK_POINTS};
 
 /// Maximum masks evaluated in-shader per draw (mirrors `MASK_CAP` in
-/// `shader.wgsl`). Extra masks on a clip beyond this are ignored by the
-/// compositor (the domain still stores and unit-tests all of them).
-const MASK_CAP: usize = 4;
+/// `shader.wgsl`). The shared edit-command validation prevents authored data
+/// from exceeding this fixed uniform capacity.
+const MASK_CAP: usize = MAX_MASKS_PER_CLIP;
 
 /// Flag bits packed into `canvas_op_flags[3]` (bitcast to u32 in WGSL).
 const FLAG_PREMULTIPLY: u32 = 1;
 const FLAG_GRADE: u32 = 2;
 const FLAG_CHROMA: u32 = 4;
 
-/// Mask kind tags (mirror `MaskShape` / the WGSL `MASK_*` consts). Polygon masks
-/// are not rendered in-shader (see shader TODO); they encode as `MASK_NOOP` which
-/// the shader treats as a full-coverage circle (no clipping).
+/// Mask kind tags and polygon point cap mirror the WGSL constants.
 const MASK_LINEAR: f32 = 0.0;
 const MASK_CIRCLE: f32 = 1.0;
-/// A circle large enough to cover the whole canvas — used to make an unsupported
-/// (polygon) mask a no-op instead of silently clipping.
-const MASK_NOOP_GEO: [f32; 4] = [0.5, 0.5, 8.0, 8.0];
+const MASK_POLY: f32 = 2.0;
+const POLY_POINT_CAP: usize = MAX_POLYGON_MASK_POINTS;
+
+/// Effect kind tags mirror the closed registry and WGSL implementation.
+const EFFECT_GRAYSCALE: f32 = 0.0;
+const EFFECT_SEPIA: f32 = 1.0;
+const EFFECT_INVERT: f32 = 2.0;
+
+#[repr(C)]
+#[derive(Clone, Copy, Pod, Zeroable, Default)]
+struct EffectGpu {
+    // (kind, amount, pad, pad)
+    data: [f32; 4],
+}
 
 /// One mask in the uniform (mirrors WGSL `MaskGpu`): `head = (kind, feather,
-/// invert, pad)`, `geo` packs the shape geometry.
+/// invert, polygon-point-count)`, `geo` packs linear/circle geometry, and
+/// `points` carries a bounded pen path.
 #[repr(C)]
 #[derive(Clone, Copy, Pod, Zeroable, Default)]
 struct MaskGpu {
     head: [f32; 4],
     geo: [f32; 4],
+    transform: [f32; 4],
+    transform_meta: [f32; 4],
+    points: [[f32; 4]; POLY_POINT_CAP],
 }
 
 /// Uniform mirror of WGSL `struct U` (SPEC §3.2), extended with the A-tier color
@@ -50,59 +66,99 @@ struct MaskGpu {
 #[repr(C)]
 #[derive(Clone, Copy, Pod, Zeroable)]
 struct Uniforms {
-    affine0: [f32; 4],         // a, b, c, d
-    crop_uv: [f32; 4],         // u0, v0, u1, v1
-    affine1_nat: [f32; 4],     // tx, ty, natW, natH
-    canvas_op_flags: [f32; 4], // canvasW, canvasH, opacity, flags-as-f32
-    grade_exp_wb: [f32; 4],    // exposure, wb_r, wb_g, wb_b
-    grade_lift: [f32; 4],      // lift_r, lift_g, lift_b, contrast
-    grade_gamma: [f32; 4],     // gamma_r, gamma_g, gamma_b, saturation
-    grade_gain: [f32; 4],      // gain_r, gain_g, gain_b, pad
-    chroma0: [f32; 4],         // key_r, key_g, key_b, similarity
-    chroma1: [f32; 4],         // smoothness, spill, pad, pad
-    mask_meta: [f32; 4],       // mask_count, pad, pad, pad
+    affine0: [f32; 4],              // a, b, c, d
+    crop_uv: [f32; 4],              // u0, v0, u1, v1
+    affine1_nat: [f32; 4],          // tx, ty, natW, natH
+    canvas_op_flags: [f32; 4],      // canvasW, canvasH, opacity, flags-as-f32
+    grade_exp_wb: [f32; 4],         // exposure, wb_r, wb_g, wb_b
+    grade_lift: [f32; 4],           // lift_r, lift_g, lift_b, contrast
+    grade_gamma: [f32; 4],          // gamma_r, gamma_g, gamma_b, saturation
+    grade_gain: [f32; 4],           // gain_r, gain_g, gain_b, pad
+    hsl_secondary_meta: [f32; 4],   // enabled, hue center, full width, feather
+    hsl_secondary_adjust: [f32; 4], // hue shift, saturation, lightness, pad
+    lut_meta: [f32; 4],             // enabled, intensity, table size, pad
+    lut_domain_min: [f32; 4],       // min r/g/b, pad
+    lut_domain_scale: [f32; 4],     // reciprocal domain span r/g/b, pad
+    chroma0: [f32; 4],              // key_r, key_g, key_b, similarity
+    chroma1: [f32; 4],              // smoothness, spill, pad, pad
+    mask_meta: [f32; 4],            // mask_count, pad, pad, pad
     masks: [MaskGpu; MASK_CAP],
+    effect_meta: [f32; 4], // effect_count, pad, pad, pad
+    effects: [EffectGpu; MAX_EFFECTS_PER_CLIP],
+}
+
+#[derive(Clone, Copy)]
+struct GradeBlocks {
+    exp_wb: [f32; 4],
+    lift: [f32; 4],
+    gamma: [f32; 4],
+    gain: [f32; 4],
+    hsl_meta: [f32; 4],
+    hsl_adjust: [f32; 4],
 }
 
 /// Identity color-grade uniform block (exposure 0, wb/gain 1, lift 0, gamma 1,
 /// contrast 0, saturation 1). Used when a draw has no grade.
-fn identity_grade_blocks() -> ([f32; 4], [f32; 4], [f32; 4], [f32; 4]) {
-    (
-        [0.0, 1.0, 1.0, 1.0], // exposure, wb
-        [0.0, 0.0, 0.0, 0.0], // lift, contrast
-        [1.0, 1.0, 1.0, 1.0], // gamma, saturation
-        [1.0, 1.0, 1.0, 0.0], // gain, pad
-    )
+fn identity_grade_blocks() -> GradeBlocks {
+    GradeBlocks {
+        exp_wb: [0.0, 1.0, 1.0, 1.0],   // exposure, wb
+        lift: [0.0, 0.0, 0.0, 0.0],     // lift, contrast
+        gamma: [1.0, 1.0, 1.0, 1.0],    // gamma, saturation
+        gain: [1.0, 1.0, 1.0, 0.0],     // gain, pad
+        hsl_meta: [0.0, 0.0, 1.0, 0.0], // disabled, center, width, feather
+        hsl_adjust: [0.0; 4],           // hue shift, saturation, lightness, pad
+    }
 }
 
-/// Pack a [`ColorGrade`] into the four uniform vec4 blocks the shader reads. The
+/// Pack a [`ColorGrade`] into the six uniform vec4 blocks the shader reads. The
 /// white balance is resolved to per-channel gain CPU-side (the shader multiplies
 /// it directly), keeping the WGSL mirror of `ColorGrade::apply_linear` simple.
-fn grade_blocks(g: &ColorGrade) -> ([f32; 4], [f32; 4], [f32; 4], [f32; 4]) {
+fn grade_blocks(g: &ColorGrade) -> GradeBlocks {
     let wb = g.white_balance_gain();
     let LiftGammaGain { lift, gamma, gain } = g.lift_gamma_gain;
-    (
-        [g.exposure as f32, wb.r as f32, wb.g as f32, wb.b as f32],
-        [
+    let (hsl_meta, hsl_adjust) =
+        g.hsl_secondary
+            .map_or(([0.0, 0.0, 1.0, 0.0], [0.0; 4]), |secondary| {
+                (
+                    [
+                        1.0,
+                        secondary.hue_center as f32,
+                        secondary.hue_width as f32,
+                        secondary.feather as f32,
+                    ],
+                    [
+                        secondary.hue_shift as f32,
+                        secondary.saturation as f32,
+                        secondary.lightness as f32,
+                        0.0,
+                    ],
+                )
+            });
+    GradeBlocks {
+        exp_wb: [g.exposure as f32, wb.r as f32, wb.g as f32, wb.b as f32],
+        lift: [
             lift.r as f32,
             lift.g as f32,
             lift.b as f32,
             g.contrast as f32,
         ],
-        [
+        gamma: [
             gamma.r as f32,
             gamma.g as f32,
             gamma.b as f32,
             g.saturation as f32,
         ],
-        [gain.r as f32, gain.g as f32, gain.b as f32, 0.0],
-    )
+        gain: [gain.r as f32, gain.g as f32, gain.b as f32, 0.0],
+        hsl_meta,
+        hsl_adjust,
+    }
 }
 
 /// Pack a draw's masks into the fixed-capacity uniform array, returning the count
-/// the shader should evaluate. Linear + circle masks encode directly; polygon
-/// masks (unsupported in-shader) encode as a full-coverage no-op so they neither
-/// clip nor crash. Masks beyond [`MASK_CAP`] are dropped.
+/// the shader should evaluate. Polygon paths are bounded to [`POLY_POINT_CAP`]
+/// points. The shared edit-command validation prevents authored data from
+/// exceeding either fixed GPU capacity; the `min`/`break` here is a deterministic
+/// defensive fallback for an in-memory timeline that bypassed that boundary.
 fn pack_masks(draw: &LayerDraw<'_>) -> ([MaskGpu; MASK_CAP], f32) {
     let mut out = [MaskGpu::default(); MASK_CAP];
     let mut n = 0usize;
@@ -111,7 +167,8 @@ fn pack_masks(draw: &LayerDraw<'_>) -> ([MaskGpu; MASK_CAP], f32) {
             break;
         }
         let invert = if mask.invert { 1.0 } else { 0.0 };
-        let (kind, geo) = match &mask.shape {
+        let mut points = [[0.0; 4]; POLY_POINT_CAP];
+        let (kind, geo, point_count) = match &mask.shape {
             MaskShape::Linear { point, normal } => (
                 MASK_LINEAR,
                 [
@@ -120,6 +177,7 @@ fn pack_masks(draw: &LayerDraw<'_>) -> ([MaskGpu; MASK_CAP], f32) {
                     normal.x as f32,
                     normal.y as f32,
                 ],
+                0,
             ),
             MaskShape::Circle { center, radius } => (
                 MASK_CIRCLE,
@@ -129,31 +187,160 @@ fn pack_masks(draw: &LayerDraw<'_>) -> ([MaskGpu; MASK_CAP], f32) {
                     radius.x as f32,
                     radius.y as f32,
                 ],
+                0,
             ),
-            // Polygon masks are unsupported in-shader (TODO: storage buffer for
-            // points). Encode as a full-canvas circle so they are a visual no-op
-            // rather than silently clipping.
-            MaskShape::Poly { .. } => (MASK_CIRCLE, MASK_NOOP_GEO),
+            MaskShape::Poly { points: path } => {
+                let point_count = path.len().min(POLY_POINT_CAP);
+                for (target, point) in points.iter_mut().zip(path).take(point_count) {
+                    *target = [point.x as f32, point.y as f32, 0.0, 0.0];
+                }
+                (MASK_POLY, [0.0; 4], point_count)
+            }
         };
         out[n] = MaskGpu {
-            head: [kind, mask.feather as f32, invert, 0.0],
+            head: [kind, mask.feather as f32, invert, point_count as f32],
             geo,
+            transform: [
+                mask.transform.offset.x as f32,
+                mask.transform.offset.y as f32,
+                mask.transform.scale.x as f32,
+                mask.transform.scale.y as f32,
+            ],
+            transform_meta: [
+                mask.transform.rotation_degrees.to_radians() as f32,
+                0.0,
+                0.0,
+                0.0,
+            ],
+            points,
         };
         n += 1;
     }
     (out, n as f32)
 }
 
+fn pack_effects(
+    draw: &LayerDraw<'_>,
+) -> Result<([EffectGpu; MAX_EFFECTS_PER_CLIP], f32), RenderError> {
+    validate_effect_chain(draw.effects)?;
+    let mut out = [EffectGpu::default(); MAX_EFFECTS_PER_CLIP];
+    let mut count = 0usize;
+    for effect in draw.effects.iter().filter(|effect| effect.enabled) {
+        let kind = match effect.name.as_str() {
+            "grayscale" => EFFECT_GRAYSCALE,
+            "sepia" => EFFECT_SEPIA,
+            "invert" => EFFECT_INVERT,
+            _ => unreachable!("validate_effect_chain accepts only registered effects"),
+        };
+        out[count] = EffectGpu {
+            data: [kind, effect.registered_param("amount")? as f32, 0.0, 0.0],
+        };
+        count += 1;
+    }
+    Ok((out, count as f32))
+}
+
 /// Working color format. The PoC composites in the sRGB non-linear domain
 /// (SPEC §3.7): an `Rgba8Unorm` target stores raw encoded bytes and blends them
 /// directly, matching AVFoundation most closely. Read-back returns those bytes.
 const RT_FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::Rgba8Unorm;
 
+/// Frame reconstruction requested from the media resolver when source and
+/// project rates differ.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum TextureInterpolationMode {
+    Nearest,
+    Blend,
+    OpticalFlow,
+}
+
+/// Deterministic recovery policy when the requested optical-flow backend is
+/// unavailable for a resolver/device.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum TextureInterpolationFallback {
+    Nearest,
+    Blend,
+    Error,
+}
+
+/// Explicit source/target-rate contract shared by preview and export.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct TextureInterpolationConfig {
+    pub source_fps: f64,
+    pub target_fps: f64,
+    pub mode: TextureInterpolationMode,
+    pub fallback: TextureInterpolationFallback,
+}
+
+impl TextureInterpolationConfig {
+    pub fn new(
+        source_fps: f64,
+        target_fps: f64,
+        mode: TextureInterpolationMode,
+        fallback: TextureInterpolationFallback,
+    ) -> Result<Self, &'static str> {
+        if !source_fps.is_finite() || source_fps <= 0.0 {
+            return Err("source_fps must be finite and greater than zero");
+        }
+        if !target_fps.is_finite() || target_fps <= 0.0 {
+            return Err("target_fps must be finite and greater than zero");
+        }
+        Ok(Self {
+            source_fps,
+            target_fps,
+            mode,
+            fallback,
+        })
+    }
+
+    /// Backward-compatible resolver behavior for callers that have not selected
+    /// a rate-conversion mode.
+    pub const fn passthrough() -> Self {
+        Self {
+            source_fps: 1.0,
+            target_fps: 1.0,
+            mode: TextureInterpolationMode::Nearest,
+            fallback: TextureInterpolationFallback::Nearest,
+        }
+    }
+}
+
+/// Complete per-layer texture request. Keeping the interpolation contract on
+/// the request prevents preview/export adapters from silently selecting
+/// different reconstruction modes.
+#[derive(Clone, Copy, Debug)]
+pub struct TextureResolveRequest<'a> {
+    pub source: &'a TextureSource,
+    pub source_frame: i64,
+    pub interpolation: TextureInterpolationConfig,
+}
+
 /// Resolves a draw's [`TextureSource`] + source frame to a GPU texture. The
 /// compositor is decode-agnostic; the integrating layer (or a test) supplies
 /// pixels (e.g. via [`crate::source::FrameProvider`] + a cache).
 pub trait TextureResolver {
     fn resolve(&mut self, source: &TextureSource, source_frame: i64) -> Option<Rc<GpuTexture>>;
+
+    /// Resolve through an explicit rate-conversion contract. Existing
+    /// resolvers remain nearest-frame compatible; optical-flow-aware resolvers
+    /// override this method and apply the requested fallback policy before GPU
+    /// upload.
+    fn resolve_with_interpolation(
+        &mut self,
+        request: TextureResolveRequest<'_>,
+    ) -> Option<Rc<GpuTexture>> {
+        self.resolve(request.source, request.source_frame)
+    }
+
+    /// Resolve a validated project-managed LUT reference. The default keeps
+    /// source-only resolvers source-compatible; the compositor still fails a
+    /// draw carrying a LUT when no asset is returned.
+    fn resolve_lut(
+        &mut self,
+        _reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, RenderError> {
+        Ok(None)
+    }
 }
 
 /// A textured-quad compositor bound to one device.
@@ -161,6 +348,7 @@ pub struct Compositor {
     pipeline: wgpu::RenderPipeline,
     bind_group_layout: wgpu::BindGroupLayout,
     sampler: wgpu::Sampler,
+    fallback_lut: GpuLutTexture,
 }
 
 impl Compositor {
@@ -200,6 +388,22 @@ impl Compositor {
                     ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
                     count: None,
                 },
+                wgpu::BindGroupLayoutEntry {
+                    binding: 3,
+                    visibility: wgpu::ShaderStages::FRAGMENT,
+                    ty: wgpu::BindingType::Texture {
+                        sample_type: wgpu::TextureSampleType::Float { filterable: true },
+                        view_dimension: wgpu::TextureViewDimension::D3,
+                        multisampled: false,
+                    },
+                    count: None,
+                },
+                wgpu::BindGroupLayoutEntry {
+                    binding: 4,
+                    visibility: wgpu::ShaderStages::FRAGMENT,
+                    ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
+                    count: None,
+                },
             ],
         });
 
@@ -264,10 +468,38 @@ impl Compositor {
             ..Default::default()
         });
 
+        // A bound texture is required even when a draw has no active LUT. The
+        // shader never samples this uninitialized 1x1 fallback when disabled.
+        let fallback_texture = device.create_texture(&wgpu::TextureDescriptor {
+            label: Some("opentake-render inactive LUT binding"),
+            size: wgpu::Extent3d {
+                width: 1,
+                height: 1,
+                depth_or_array_layers: 1,
+            },
+            mip_level_count: 1,
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D3,
+            format: wgpu::TextureFormat::Rgba16Float,
+            usage: wgpu::TextureUsages::TEXTURE_BINDING,
+            view_formats: &[],
+        });
+        let fallback_view = fallback_texture.create_view(&wgpu::TextureViewDescriptor {
+            dimension: Some(wgpu::TextureViewDimension::D3),
+            ..Default::default()
+        });
+
         Compositor {
             pipeline,
             bind_group_layout,
             sampler,
+            fallback_lut: GpuLutTexture {
+                texture: fallback_texture,
+                view: fallback_view,
+                size: 1,
+                domain_min: [0.0; 3],
+                domain_max: [1.0; 3],
+            },
         }
     }
 
@@ -284,6 +516,28 @@ impl Compositor {
         size: RenderSize,
         frame_plan: &FramePlan<'_>,
         resolver: &mut dyn TextureResolver,
+    ) -> Result<DecodedFrame, RenderError> {
+        self.render_to_rgba_with_interpolation(
+            device,
+            queue,
+            size,
+            frame_plan,
+            resolver,
+            TextureInterpolationConfig::passthrough(),
+        )
+    }
+
+    /// Render with an explicit source/target-rate interpolation policy. Preview
+    /// and export pass the same value here so their resolver behavior cannot
+    /// drift independently.
+    pub fn render_to_rgba_with_interpolation(
+        &self,
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        size: RenderSize,
+        frame_plan: &FramePlan<'_>,
+        resolver: &mut dyn TextureResolver,
+        interpolation: TextureInterpolationConfig,
     ) -> Result<DecodedFrame, RenderError> {
         let rt = device.create_texture(&wgpu::TextureDescriptor {
             label: Some("opentake-render target"),
@@ -306,11 +560,26 @@ impl Compositor {
         struct Prepared {
             bind_group: wgpu::BindGroup,
             _tex: Rc<GpuTexture>,
+            _lut: Option<Rc<GpuLutTexture>>,
         }
         let mut prepared: Vec<Prepared> = Vec::with_capacity(frame_plan.draws.len());
 
         for draw in &frame_plan.draws {
-            let Some(tex) = resolver.resolve(draw.source, draw.source_frame) else {
+            // Reject invalid persisted data even when the source is offline;
+            // an unknown effect or malformed grade must never degrade into an
+            // unchanged frame or reach the GPU as NaN/Inf uniforms.
+            let (effects, effect_count) = pack_effects(draw)?;
+            if let Some(grade) = draw.color_grade {
+                grade.validate()?;
+            }
+            if let Some(reference) = draw.lut {
+                reference.validate()?;
+            }
+            let Some(tex) = resolver.resolve_with_interpolation(TextureResolveRequest {
+                source: draw.source,
+                source_frame: draw.source_frame,
+                interpolation,
+            }) else {
                 continue;
             };
             // Assemble flags + the A-tier parameter blocks for this draw.
@@ -319,7 +588,7 @@ impl Compositor {
             } else {
                 0
             };
-            let (grade_exp_wb, grade_lift, grade_gamma, grade_gain) = match draw.color_grade {
+            let grade = match draw.color_grade {
                 Some(g) if !g.is_identity() => {
                     flags |= FLAG_GRADE;
                     grade_blocks(g)
@@ -342,6 +611,33 @@ impl Compositor {
                 None => ([0.0, 1.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0]),
             };
             let (masks, mask_count) = pack_masks(draw);
+            let resolved_lut = match draw.lut {
+                Some(reference) => Some(
+                    resolver
+                        .resolve_lut(reference)?
+                        .ok_or_else(|| RenderError::MissingLut(reference.id.clone()))?,
+                ),
+                None => None,
+            };
+            let (lut_meta, lut_domain_min, lut_domain_scale) = match draw.lut {
+                Some(reference) => {
+                    let parsed = resolved_lut.as_ref().expect("resolved above");
+                    let domain_scale: [f32; 3] = std::array::from_fn(|channel| {
+                        1.0 / (parsed.domain_max[channel] - parsed.domain_min[channel])
+                    });
+                    (
+                        [1.0, reference.intensity as f32, parsed.size as f32, 0.0],
+                        [
+                            parsed.domain_min[0],
+                            parsed.domain_min[1],
+                            parsed.domain_min[2],
+                            0.0,
+                        ],
+                        [domain_scale[0], domain_scale[1], domain_scale[2], 0.0],
+                    )
+                }
+                None => ([0.0; 4], [0.0; 4], [1.0, 1.0, 1.0, 0.0]),
+            };
             let u = Uniforms {
                 affine0: [
                     draw.affine[0] as f32,
@@ -374,14 +670,21 @@ impl Compositor {
                     draw.opacity as f32,
                     f32::from_bits(flags),
                 ],
-                grade_exp_wb,
-                grade_lift,
-                grade_gamma,
-                grade_gain,
+                grade_exp_wb: grade.exp_wb,
+                grade_lift: grade.lift,
+                grade_gamma: grade.gamma,
+                grade_gain: grade.gain,
+                hsl_secondary_meta: grade.hsl_meta,
+                hsl_secondary_adjust: grade.hsl_adjust,
+                lut_meta,
+                lut_domain_min,
+                lut_domain_scale,
                 chroma0,
                 chroma1,
                 mask_meta: [mask_count, 0.0, 0.0, 0.0],
                 masks,
+                effect_meta: [effect_count, 0.0, 0.0, 0.0],
+                effects,
             };
             let ubuf = device.create_buffer(&wgpu::BufferDescriptor {
                 label: Some("opentake-render uniform"),
@@ -391,6 +694,10 @@ impl Compositor {
             });
             queue.write_buffer(&ubuf, 0, bytemuck::bytes_of(&u));
 
+            let lut_view = resolved_lut
+                .as_ref()
+                .map_or(&self.fallback_lut.view, |lut| &lut.view);
+
             let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
                 label: Some("opentake-render bind group"),
                 layout: &self.bind_group_layout,
@@ -407,11 +714,20 @@ impl Compositor {
                         binding: 2,
                         resource: wgpu::BindingResource::Sampler(&self.sampler),
                     },
+                    wgpu::BindGroupEntry {
+                        binding: 3,
+                        resource: wgpu::BindingResource::TextureView(lut_view),
+                    },
+                    wgpu::BindGroupEntry {
+                        binding: 4,
+                        resource: wgpu::BindingResource::Sampler(&self.sampler),
+                    },
                 ],
             });
             prepared.push(Prepared {
                 bind_group,
                 _tex: tex,
+                _lut: resolved_lut,
             });
         }
 
diff --git a/crates/opentake-render/src/gpu/mod.rs b/crates/opentake-render/src/gpu/mod.rs
index 4b4b11b5..9115a0bd 100644
--- a/crates/opentake-render/src/gpu/mod.rs
+++ b/crates/opentake-render/src/gpu/mod.rs
@@ -17,7 +17,7 @@ pub use compositor::{Compositor, TextureResolver};
 pub use device::RenderDevice;
 pub use text_engine::CosmicTextRasterizer;
 pub use text_raster::{NullTextRasterizer, TextRasterRequest, TextRasterizer};
-pub use texture::{upload_rgba, GpuTexture, TextureCache};
+pub use texture::{upload_lut_3d, upload_rgba, GpuLutTexture, GpuTexture, TextureCache};
 
 /// Errors from GPU device acquisition and frame compositing.
 #[derive(Debug, thiserror::Error)]
@@ -29,4 +29,14 @@ pub enum RenderError {
     DeviceRequest(String),
     #[error("frame read-back failed: {0}")]
     Readback(String),
+    #[error("invalid effect chain: {0}")]
+    InvalidEffect(#[from] opentake_domain::EffectValidationError),
+    #[error("invalid color grade: {0}")]
+    InvalidColorGrade(#[from] opentake_domain::ColorGradeValidationError),
+    #[error("invalid LUT reference: {0}")]
+    InvalidLutReference(#[from] opentake_domain::LutReferenceValidationError),
+    #[error("LUT asset could not be resolved: {0}")]
+    MissingLut(String),
+    #[error("invalid LUT asset: {0}")]
+    InvalidLut(String),
 }
diff --git a/crates/opentake-render/src/gpu/shader.wgsl b/crates/opentake-render/src/gpu/shader.wgsl
index 5a8d2157..6f2b0e89 100644
--- a/crates/opentake-render/src/gpu/shader.wgsl
+++ b/crates/opentake-render/src/gpu/shader.wgsl
@@ -26,28 +26,39 @@
 //   on the (sampled) color directly, matching the domain reference which is
 //   space-agnostic for those stages.
 //
-// MASK CAP: up to MASK_CAP masks are evaluated in-shader (linear + circle SDF).
-// Polygon masks are carried in the domain/plan and fully unit-tested there, but
-// their variable-length point list does not fit this fixed uniform; wiring
-// polygon points through a storage buffer is a documented render-side TODO.
+// MASK CAP: up to MASK_CAP masks and POLY_POINT_CAP pen points per mask are
+// evaluated in-shader. The fixed point cap keeps the uniform layout portable.
 
 const MASK_CAP: u32 = 4u;
+const POLY_POINT_CAP: u32 = 16u;
+const EFFECT_CAP: u32 = 8u;
 
 // Flag bits packed into U.canvas_op_flags.w (bitcast to u32).
 const FLAG_PREMULTIPLY: u32 = 1u;   // straight-alpha source needs premultiply
 const FLAG_GRADE: u32 = 2u;         // color grade active
 const FLAG_CHROMA: u32 = 4u;        // chroma key active
 
-// Mask kind tags (mirror MaskShape; poly is not evaluated in-shader).
+// Mask kind tags (mirror MaskShape).
 const MASK_LINEAR: u32 = 0u;
 const MASK_CIRCLE: u32 = 1u;
+const MASK_POLY: u32 = 2u;
 
 struct MaskGpu {
-    // (kind-as-f32, feather, invert-as-f32, pad)
+    // (kind-as-f32, feather, invert-as-f32, polygon-point-count)
     head: vec4<f32>,
     // linear: (point.x, point.y, normal.x, normal.y)
     // circle: (center.x, center.y, radius.x, radius.y)
     geo: vec4<f32>,
+    // (offset.x, offset.y, scale.x, scale.y)
+    transform: vec4<f32>,
+    // (rotation radians, pad, pad, pad)
+    transform_meta: vec4<f32>,
+    points: array<vec4<f32>, POLY_POINT_CAP>,
+};
+
+struct EffectGpu {
+    // (kind, amount, pad, pad)
+    data: vec4<f32>,
 };
 
 // Laid out as vec4s so every field is 16-byte aligned (no implicit WGSL padding)
@@ -62,17 +73,43 @@ struct U {
     grade_lift: vec4<f32>,     // lift_r, lift_g, lift_b, contrast
     grade_gamma: vec4<f32>,    // gamma_r, gamma_g, gamma_b, saturation
     grade_gain: vec4<f32>,     // gain_r, gain_g, gain_b, pad
+    hsl_secondary_meta: vec4<f32>, // enabled, hue center, full width, feather
+    hsl_secondary_adjust: vec4<f32>, // hue shift, saturation, lightness, pad
+    lut_meta: vec4<f32>,       // enabled, intensity, table size, pad
+    lut_domain_min: vec4<f32>, // min r/g/b, pad
+    lut_domain_scale: vec4<f32>, // reciprocal domain span r/g/b, pad
     // Chroma key.
     chroma0: vec4<f32>,        // key_r, key_g, key_b, similarity
     chroma1: vec4<f32>,        // smoothness, spill, pad, pad
     // Mask count (x) + padding.
     mask_meta: vec4<f32>,      // mask_count, pad, pad, pad
     masks: array<MaskGpu, MASK_CAP>,
+    effect_meta: vec4<f32>,    // effect_count, pad, pad, pad
+    effects: array<EffectGpu, EFFECT_CAP>,
 };
 
 @group(0) @binding(0) var<uniform> u: U;
 @group(0) @binding(1) var t_color: texture_2d<f32>;
 @group(0) @binding(2) var s_color: sampler;
+@group(0) @binding(3) var t_lut: texture_3d<f32>;
+@group(0) @binding(4) var s_lut: sampler;
+
+fn apply_lut(rgb: vec3<f32>) -> vec3<f32> {
+    if (u.lut_meta.x < 0.5 || u.lut_meta.y <= 0.0) {
+        return rgb;
+    }
+    let normalized = clamp(
+        (rgb - u.lut_domain_min.xyz) * u.lut_domain_scale.xyz,
+        vec3<f32>(0.0),
+        vec3<f32>(1.0),
+    );
+    let table_size = u.lut_meta.z;
+    // Align authored grid points i/(N-1) with texel centers before hardware
+    // trilinear filtering.
+    let coordinate = (normalized * (table_size - 1.0) + vec3<f32>(0.5)) / table_size;
+    let transformed = textureSample(t_lut, s_lut, coordinate).rgb;
+    return mix(rgb, transformed, clamp(u.lut_meta.y, 0.0, 1.0));
+}
 
 struct VsOut {
     @builtin(position) pos: vec4<f32>,
@@ -112,15 +149,84 @@ fn smoothstep01(edge0: f32, edge1: f32, x: f32) -> f32 {
 const CONTRAST_PIVOT: f32 = 0.18;
 
 fn apply_channel_lgg(x: f32, lift: f32, gamma: f32, gain: f32) -> f32 {
-    let v = gain * (x + lift);
+    let shaped = x + lift * (1.0 - x);
     if (abs(gamma - 1.0) > 1e-6 && gamma > 0.0) {
-        return pow(max(v, 0.0), 1.0 / gamma);
+        return gain * pow(max(shaped, 0.0), 1.0 / gamma);
+    }
+    return gain * shaped;
+}
+
+fn rgb_to_hsl(c: vec3<f32>) -> vec3<f32> {
+    let maximum = max(c.r, max(c.g, c.b));
+    let minimum = min(c.r, min(c.g, c.b));
+    let delta = maximum - minimum;
+    let lightness = (maximum + minimum) * 0.5;
+    if (delta <= 1e-7) {
+        return vec3<f32>(0.0, 0.0, lightness);
+    }
+    let saturation = delta / max(1.0 - abs(2.0 * lightness - 1.0), 1e-7);
+    var sector = 0.0;
+    if (maximum == c.r) {
+        sector = ((c.g - c.b) / delta) % 6.0;
+        if (sector < 0.0) {
+            sector = sector + 6.0;
+        }
+    } else if (maximum == c.g) {
+        sector = (c.b - c.r) / delta + 2.0;
+    } else {
+        sector = (c.r - c.g) / delta + 4.0;
     }
-    return v;
+    return vec3<f32>(sector / 6.0, saturation, lightness);
+}
+
+fn hsl_to_rgb(hsl: vec3<f32>) -> vec3<f32> {
+    let chroma = (1.0 - abs(2.0 * hsl.z - 1.0)) * hsl.y;
+    let sector = fract(hsl.x) * 6.0;
+    let x = chroma * (1.0 - abs((sector % 2.0) - 1.0));
+    var rgb = vec3<f32>(0.0);
+    if (sector < 1.0) {
+        rgb = vec3<f32>(chroma, x, 0.0);
+    } else if (sector < 2.0) {
+        rgb = vec3<f32>(x, chroma, 0.0);
+    } else if (sector < 3.0) {
+        rgb = vec3<f32>(0.0, chroma, x);
+    } else if (sector < 4.0) {
+        rgb = vec3<f32>(0.0, x, chroma);
+    } else if (sector < 5.0) {
+        rgb = vec3<f32>(x, 0.0, chroma);
+    } else {
+        rgb = vec3<f32>(chroma, 0.0, x);
+    }
+    return rgb + vec3<f32>(hsl.z - chroma * 0.5);
+}
+
+fn apply_hsl_secondary(c: vec3<f32>) -> vec3<f32> {
+    if (u.hsl_secondary_meta.x < 0.5) {
+        return c;
+    }
+    var hsl = rgb_to_hsl(c);
+    if (hsl.y <= 1e-7) {
+        return c;
+    }
+    let delta = abs(fract(hsl.x - u.hsl_secondary_meta.y + 0.5) - 0.5);
+    let outer = u.hsl_secondary_meta.z * 0.5;
+    if (delta > outer) {
+        return c;
+    }
+    let feather = u.hsl_secondary_meta.w;
+    var weight = 1.0;
+    if (feather > 1e-7) {
+        weight = 1.0 - smoothstep01(max(outer - feather, 0.0), outer, delta);
+    }
+    hsl.x = fract(hsl.x + u.hsl_secondary_adjust.x * weight + 1.0);
+    hsl.y = clamp(hsl.y * (1.0 + u.hsl_secondary_adjust.y * weight), 0.0, 1.0);
+    hsl.z = clamp(hsl.z + u.hsl_secondary_adjust.z * weight, 0.0, 1.0);
+    return hsl_to_rgb(hsl);
 }
 
 // Applies the grade to a LINEAR-rgb triple, returning clamped linear rgb. Mirror
-// of ColorGrade::apply_linear (exposure -> wb -> lgg -> contrast -> saturation).
+// of ColorGrade::apply_linear
+// (exposure -> wb -> lgg -> contrast -> saturation -> HSL secondary).
 fn apply_grade_linear(rgb_in: vec3<f32>) -> vec3<f32> {
     var c = rgb_in;
 
@@ -151,6 +257,9 @@ fn apply_grade_linear(rgb_in: vec3<f32>) -> vec3<f32> {
     let l = luma709(c);
     c = vec3<f32>(l) + (c - vec3<f32>(l)) * saturation;
 
+    // 6. Feathered HSL secondary qualifier.
+    c = apply_hsl_secondary(c);
+
     return clamp(c, vec3<f32>(0.0), vec3<f32>(1.0));
 }
 
@@ -193,10 +302,60 @@ fn suppress_spill(c: vec3<f32>) -> vec3<f32> {
     return vec3<f32>(nr, c.g, c.b);
 }
 
-// ---- Masks (mirror of Mask::coverage; linear + circle in-shader) ------------
+// ---- Masks (mirror of Mask::coverage) ---------------------------------------
+
+fn mask_local_point(m: MaskGpu, p: vec2<f32>) -> vec2<f32> {
+    let scale = max(abs(m.transform.zw), vec2<f32>(1e-6));
+    let radians = m.transform_meta.x;
+    let c = cos(radians);
+    let s = sin(radians);
+    let delta = p - vec2<f32>(0.5) - m.transform.xy;
+    let unrotated = vec2<f32>(
+        c * delta.x + s * delta.y,
+        -s * delta.x + c * delta.y,
+    );
+    return unrotated / scale + vec2<f32>(0.5);
+}
+
+fn point_segment_dist2(p: vec2<f32>, a: vec2<f32>, b: vec2<f32>) -> f32 {
+    let ab = b - a;
+    let denom = dot(ab, ab);
+    var t = 0.0;
+    if (denom > 1e-12) {
+        t = clamp(dot(p - a, ab) / denom, 0.0, 1.0);
+    }
+    let delta = p - (a + ab * t);
+    return dot(delta, delta);
+}
+
+fn polygon_signed_distance(m: MaskGpu, p: vec2<f32>) -> f32 {
+    let count = min(u32(m.head.w + 0.5), POLY_POINT_CAP);
+    if (count < 3u) {
+        return 1e6;
+    }
+    var inside = false;
+    var min_d2 = 1e12;
+    var j = count - 1u;
+    for (var i: u32 = 0u; i < count; i = i + 1u) {
+        let a = m.points[i].xy;
+        let b = m.points[j].xy;
+        let crosses_y = (a.y > p.y) != (b.y > p.y);
+        if (crosses_y) {
+            let edge_x = (b.x - a.x) * (p.y - a.y) / (b.y - a.y) + a.x;
+            if (p.x < edge_x) {
+                inside = !inside;
+            }
+        }
+        min_d2 = min(min_d2, point_segment_dist2(p, a, b));
+        j = i;
+    }
+    let distance = sqrt(min_d2);
+    return select(distance, -distance, inside);
+}
 
 fn mask_signed_distance(m: MaskGpu, p: vec2<f32>) -> f32 {
     let kind = u32(m.head.x + 0.5);
+    let local = mask_local_point(m, p);
     if (kind == MASK_LINEAR) {
         let point = m.geo.xy;
         let normal = m.geo.zw;
@@ -205,12 +364,15 @@ fn mask_signed_distance(m: MaskGpu, p: vec2<f32>) -> f32 {
             return 0.0;
         }
         let n = normal / nlen;
-        return -dot(p - point, n);
+        return -dot(local - point, n);
+    }
+    if (kind == MASK_POLY) {
+        return polygon_signed_distance(m, local);
     }
     // Circle (default for any other tag).
     let center = m.geo.xy;
     let radius = max(m.geo.zw, vec2<f32>(1e-6));
-    let d = length((p - center) / radius);
+    let d = length((local - center) / radius);
     return (d - 1.0) * min(radius.x, radius.y);
 }
 
@@ -237,6 +399,39 @@ fn masks_coverage(p: vec2<f32>) -> f32 {
     return cov;
 }
 
+// ---- Closed generic effect chain ------------------------------------------
+
+const EFFECT_GRAYSCALE: u32 = 0u;
+const EFFECT_SEPIA: u32 = 1u;
+const EFFECT_INVERT: u32 = 2u;
+
+fn apply_effect(effect: EffectGpu, input: vec3<f32>) -> vec3<f32> {
+    let kind = u32(effect.data.x + 0.5);
+    let amount = clamp(effect.data.y, 0.0, 1.0);
+    var transformed = input;
+    if (kind == EFFECT_GRAYSCALE) {
+        transformed = vec3<f32>(luma709(input));
+    } else if (kind == EFFECT_SEPIA) {
+        transformed = vec3<f32>(
+            dot(input, vec3<f32>(0.393, 0.769, 0.189)),
+            dot(input, vec3<f32>(0.349, 0.686, 0.168)),
+            dot(input, vec3<f32>(0.272, 0.534, 0.131)),
+        );
+    } else if (kind == EFFECT_INVERT) {
+        transformed = vec3<f32>(1.0) - input;
+    }
+    return clamp(mix(input, transformed, amount), vec3<f32>(0.0), vec3<f32>(1.0));
+}
+
+fn apply_effect_chain(input: vec3<f32>) -> vec3<f32> {
+    let count = min(u32(u.effect_meta.x + 0.5), EFFECT_CAP);
+    var result = input;
+    for (var i: u32 = 0u; i < count; i = i + 1u) {
+        result = apply_effect(u.effects[i], result);
+    }
+    return result;
+}
+
 @vertex
 fn vs(@builtin(vertex_index) vi: u32) -> VsOut {
     // Triangle-strip quad: (0,0) (1,0) (0,1) (1,1).
@@ -333,7 +528,13 @@ fn fs(in: VsOut) -> @location(0) vec4<f32> {
         rgb = linear_to_srgb(graded);
     }
 
-    // 3. Masks (intersected coverage) scale alpha.
+    // 3. Project-managed 3D LUT in display-encoded RGB.
+    rgb = apply_lut(rgb);
+
+    // 4. Ordered, schema-validated generic effects.
+    rgb = apply_effect_chain(rgb);
+
+    // 5. Masks (intersected coverage) scale alpha.
     alpha = alpha * masks_coverage(in.canvas_uv);
 
     // Premultiply once (the compositor blends premultiplied over), then apply the
diff --git a/crates/opentake-render/src/gpu/text_engine.rs b/crates/opentake-render/src/gpu/text_engine.rs
index d87668d8..d22e4353 100644
--- a/crates/opentake-render/src/gpu/text_engine.rs
+++ b/crates/opentake-render/src/gpu/text_engine.rs
@@ -16,16 +16,17 @@
 //! - **Rich text** (multi-span styles): cosmic-text `Buffer::set_rich_text` takes
 //!   an iterator of `(text, Attrs)` spans; the current path uses `set_text`
 //!   (single style per clip) — switching needs a `TextRasterRequest` shape change.
-//! - **Emoji / CJK fallback**: cosmic-text 0.12 `Attrs` has no `family_emoji` /
-//!   `family_asian` (added in 0.14+); fallback relies on fontdb's default
-//!   sans-serif. TODO when the crate is bumped.
+//! - **Emoji / CJK selection hints**: cosmic-text 0.12 `Attrs` has no
+//!   `family_emoji` / `family_asian` (added in 0.14+), so fallback uses its
+//!   script-aware fontdb search rather than an explicit preferred family.
 //! - **Vertical text**: unsupported (upstream doesn't expose it via `TextStyle`);
 //!   v1 leaves it horizontal.
 
 use std::cell::RefCell;
 
 use cosmic_text::{
-    Align, Attrs, Buffer, Color, Family, FontSystem, Metrics, Shaping, Style, SwashCache, Weight,
+    fontdb, Align, Attrs, Buffer, Color, Family, FontSystem, Metrics, Shaping, Style, SwashCache,
+    Weight,
 };
 use opentake_domain::{Rgba, TextAlignment};
 
@@ -57,9 +58,23 @@ impl CosmicTextRasterizer {
     /// directories once and is mildly expensive (~tens of ms); construct it once
     /// and reuse.
     pub fn new() -> Self {
+        Self::from_font_system(FontSystem::new())
+    }
+
+    /// Build the deterministic no-font fallback used by headless runtimes and
+    /// tests. Text requests still yield a correctly sized premultiplied frame;
+    /// glyph coverage is empty while background and border styles remain live.
+    pub fn without_system_fonts() -> Self {
+        Self::from_font_system(FontSystem::new_with_locale_and_db(
+            "en-US".to_string(),
+            fontdb::Database::new(),
+        ))
+    }
+
+    fn from_font_system(font_system: FontSystem) -> Self {
         CosmicTextRasterizer {
             inner: RefCell::new(Inner {
-                font_system: FontSystem::new(),
+                font_system,
                 swash_cache: SwashCache::new(),
             }),
         }
@@ -180,6 +195,22 @@ fn rasterize_box(inner: &mut Inner, req: &TextRasterRequest<'_>) -> Option<Decod
     let fs = &mut inner.font_system;
     let swash = &mut inner.swash_cache;
 
+    // cosmic-text 0.12 assumes a default font exists and panics while shaping
+    // an empty database. Preserve the public non-crashing headless contract by
+    // rendering the non-glyph box styles directly when no face is available.
+    if fs.db().faces().next().is_none() {
+        let mut out = vec![0u8; (bw * bh * 4) as usize];
+        if style.background.enabled {
+            fill_rect(&mut out, bw, bh, 0, 0, bw, bh, style.background.color);
+        }
+        if style.border.enabled {
+            let scale = req.canvas.1 as f64 / CANVAS_BASIS_HEIGHT;
+            let thickness = (2.0 * scale).round().max(1.0) as u32;
+            stroke_rect(&mut out, bw, bh, thickness, style.border.color);
+        }
+        return Some(DecodedFrame::new(bw, bh, out, true));
+    }
+
     // Canvas-relative font size (upstream basis) — at least 1px.
     let font_px =
         (style.font_size * style.font_scale * (req.canvas.1 as f64 / CANVAS_BASIS_HEIGHT)).max(1.0);
@@ -262,7 +293,9 @@ fn rasterize_box(inner: &mut Inner, req: &TextRasterRequest<'_>) -> Option<Decod
     composite_mask(&mut out, bw, bh, &mask, 0, 0, style.color);
 
     if style.border.enabled {
-        stroke_rect(&mut out, bw, bh, style.border.color);
+        let scale = req.canvas.1 as f64 / CANVAS_BASIS_HEIGHT;
+        let thickness = (2.0 * scale).round().max(1.0) as u32;
+        stroke_rect(&mut out, bw, bh, thickness, style.border.color);
     }
 
     Some(DecodedFrame::new(bw, bh, out, true))
@@ -321,9 +354,10 @@ fn fill_rect(out: &mut [u8], w: u32, h: u32, x0: u32, y0: u32, rw: u32, rh: u32,
     }
 }
 
-/// Stroke the box perimeter (2px) with a straight-alpha color.
-fn stroke_rect(out: &mut [u8], w: u32, h: u32, color: Rgba) {
-    let t = 2u32.min(w).min(h);
+/// Stroke the box perimeter with a straight-alpha color. Thickness is already
+/// scaled from the upstream 2px-at-1080p basis by the caller.
+fn stroke_rect(out: &mut [u8], w: u32, h: u32, thickness: u32, color: Rgba) {
+    let t = thickness.min(w).min(h);
     fill_rect(out, w, h, 0, 0, w, t, color); // top
     fill_rect(out, w, h, 0, h.saturating_sub(t), w, t, color); // bottom
     fill_rect(out, w, h, 0, 0, t, h, color); // left
diff --git a/crates/opentake-render/src/gpu/texture.rs b/crates/opentake-render/src/gpu/texture.rs
index 4bc483d8..cc87c315 100644
--- a/crates/opentake-render/src/gpu/texture.rs
+++ b/crates/opentake-render/src/gpu/texture.rs
@@ -9,6 +9,7 @@ use std::collections::{HashMap, VecDeque};
 use std::rc::Rc;
 
 use crate::source::DecodedFrame;
+use opentake_domain::CubeLut;
 
 /// A GPU texture plus a bindable view, reference-counted so a cache entry and an
 /// in-flight draw can share it.
@@ -19,6 +20,90 @@ pub struct GpuTexture {
     pub height: u32,
 }
 
+/// A filterable 3D LUT texture plus its bindable D3 view.
+pub struct GpuLutTexture {
+    pub texture: wgpu::Texture,
+    pub view: wgpu::TextureView,
+    pub size: u32,
+    pub domain_min: [f32; 3],
+    pub domain_max: [f32; 3],
+}
+
+/// Upload a validated `.cube` table as RGBA16F. The alpha lane is padding.
+pub fn upload_lut_3d(
+    device: &wgpu::Device,
+    queue: &wgpu::Queue,
+    lut: &CubeLut,
+    label: Option<&str>,
+) -> GpuLutTexture {
+    upload_lut_table_3d(
+        device,
+        queue,
+        lut.size(),
+        lut.domain_min(),
+        lut.domain_max(),
+        lut.table(),
+        label,
+    )
+}
+
+pub(crate) fn upload_lut_table_3d(
+    device: &wgpu::Device,
+    queue: &wgpu::Queue,
+    lut_size: u32,
+    domain_min: [f32; 3],
+    domain_max: [f32; 3],
+    table: &[[f32; 3]],
+    label: Option<&str>,
+) -> GpuLutTexture {
+    let extent = wgpu::Extent3d {
+        width: lut_size,
+        height: lut_size,
+        depth_or_array_layers: lut_size,
+    };
+    let texture = device.create_texture(&wgpu::TextureDescriptor {
+        label,
+        size: extent,
+        mip_level_count: 1,
+        sample_count: 1,
+        dimension: wgpu::TextureDimension::D3,
+        format: wgpu::TextureFormat::Rgba16Float,
+        usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
+        view_formats: &[],
+    });
+    let mut rgba = Vec::<u16>::with_capacity(table.len() * 4);
+    for value in table {
+        rgba.extend(value.map(|channel| half::f16::from_f32(channel).to_bits()));
+        rgba.push(half::f16::ONE.to_bits());
+    }
+    queue.write_texture(
+        wgpu::ImageCopyTexture {
+            texture: &texture,
+            mip_level: 0,
+            origin: wgpu::Origin3d::ZERO,
+            aspect: wgpu::TextureAspect::All,
+        },
+        bytemuck::cast_slice(&rgba),
+        wgpu::ImageDataLayout {
+            offset: 0,
+            bytes_per_row: Some(lut_size * 8),
+            rows_per_image: Some(lut_size),
+        },
+        extent,
+    );
+    let view = texture.create_view(&wgpu::TextureViewDescriptor {
+        dimension: Some(wgpu::TextureViewDimension::D3),
+        ..Default::default()
+    });
+    GpuLutTexture {
+        texture,
+        view,
+        size: lut_size,
+        domain_min,
+        domain_max,
+    }
+}
+
 /// Upload a [`DecodedFrame`] as an RGBA8 texture.
 ///
 /// `srgb` selects the texture format: `Rgba8UnormSrgb` makes the sampler return
diff --git a/crates/opentake-render/src/lib.rs b/crates/opentake-render/src/lib.rs
index 893896a4..639a82f9 100644
--- a/crates/opentake-render/src/lib.rs
+++ b/crates/opentake-render/src/lib.rs
@@ -14,13 +14,14 @@ pub mod source;
 pub use wgpu;
 
 pub use plan::{
-    affine_transform, build_render_plan, compose, crop_to_uv, source_frame_index, ClipPlan,
-    FramePlan, LayerDraw, RenderPlan, RenderSize, TextureSource,
+    affine_transform, build_render_plan, compose, crop_to_uv, source_frame_index,
+    try_build_render_plan, AudioClipPlan, ClipPlan, CompoundAncestor, FramePlan, LayerDraw,
+    RenderPlan, RenderSize, TextureSource,
 };
 pub use size::{even, export_render_size, ExportResolution};
 pub use source::{DecodedFrame, FrameProvider, SourceMetrics};
 
 pub use gpu::{
-    Compositor, CosmicTextRasterizer, GpuTexture, NullTextRasterizer, RenderDevice, RenderError,
-    TextRasterRequest, TextRasterizer, TextureCache, TextureResolver,
+    Compositor, CosmicTextRasterizer, GpuLutTexture, GpuTexture, NullTextRasterizer, RenderDevice,
+    RenderError, TextRasterRequest, TextRasterizer, TextureCache, TextureResolver,
 };
diff --git a/crates/opentake-render/src/plan/build.rs b/crates/opentake-render/src/plan/build.rs
index 2e84da15..e64a7564 100644
--- a/crates/opentake-render/src/plan/build.rs
+++ b/crates/opentake-render/src/plan/build.rs
@@ -6,10 +6,15 @@
 //! keyframe / fade / dB sample goes through the domain `*_at` methods (SPEC §0
 //! iron rule); this module only adds geometry projection + frame scheduling.
 
-use opentake_domain::{Clip, ClipType, Timeline};
+use std::collections::{HashMap, HashSet};
+
+use opentake_domain::{Clip, ClipType, NestedSequence, Timeline, TransitionKind};
 
 use super::affine::{affine_transform, compose, crop_to_uv};
-use super::types::{ClipPlan, FramePlan, LayerDraw, RenderPlan, RenderSize, TextureSource};
+use super::types::{
+    AudioClipPlan, ClipPlan, CompoundAncestor, FramePlan, LayerDraw, RenderPlan, RenderSize,
+    TextureSource,
+};
 use crate::source::SourceMetrics;
 
 /// Half-away-from-zero round, matching the domain convention (`clip.rs` L7).
@@ -65,11 +70,42 @@ fn texture_source_for(clip: &Clip) -> TextureSource {
     }
 }
 
+/// Compose authored transform animation with the clip-relative stabilization
+/// track. The same helper is used by ordinary frames, transitions, preview, and
+/// export, preventing separate stabilization math from drifting by surface.
+fn evaluated_transform(
+    clip: &Clip,
+    frame: i32,
+    render_size: RenderSize,
+) -> opentake_domain::Transform {
+    let mut transform = if clip.has_transform_animation() {
+        clip.transform_at(frame)
+    } else {
+        clip.transform
+    };
+    if let Some(stabilization) = &clip.stabilization {
+        let correction = stabilization.sample(frame - clip.start_frame);
+        let scale = stabilization.crop_scale(render_size.width_f() / render_size.height_f());
+        transform.center_x += correction.translation_x;
+        transform.center_y += correction.translation_y;
+        transform.width *= scale;
+        transform.height *= scale;
+        transform.rotation += correction.rotation_degrees;
+    }
+    transform
+}
+
 /// Build a [`ClipPlan`] for one selected clip.
+#[allow(clippy::too_many_arguments)]
 fn make_clip_plan(
     clip: &Clip,
     track_index: usize,
     clip_index: usize,
+    blend_path: Vec<usize>,
+    compound_ancestors: Vec<CompoundAncestor>,
+    visible_start: i32,
+    visible_end: i32,
+    effective_trim_start: i32,
     sources: &dyn SourceMetrics,
     render_size: RenderSize,
 ) -> ClipPlan {
@@ -111,24 +147,28 @@ fn make_clip_plan(
     };
 
     ClipPlan {
+        clip: clip.clone(),
         clip_id: clip.id.clone(),
         track_index,
         clip_index,
+        blend_path,
+        compound_ancestors,
         source: texture_source_for(clip),
-        start_frame: clip.start_frame,
-        end_frame: clip.end_frame(),
+        start_frame: visible_start,
+        end_frame: visible_end,
         nat_size,
         preferred_transform,
         needs_premultiply,
         speed: clip.speed,
         reversed: clip.reversed,
-        trim_start_frame: clip.trim_start_frame,
+        trim_start_frame: effective_trim_start,
         media_type: clip.media_type,
         lottie_frame_count,
         // Advanced pixel-effect inputs, copied verbatim from the clip (frame-
         // independent this round). Drop a color grade that is the identity so the
         // compositor can skip it cheaply.
         color_grade: clip.color_grade.filter(|g| !g.is_identity()),
+        lut: clip.lut.clone(),
         chroma_key: clip.chroma_key,
         masks: clip.masks.clone(),
         effects: clip.effects.clone(),
@@ -151,10 +191,84 @@ pub fn build_render_plan(
     render_size: RenderSize,
     sources: &dyn SourceMetrics,
 ) -> RenderPlan {
+    try_build_render_plan(timeline, render_size, sources)
+        .expect("timeline graph must be valid before building a render plan")
+}
+
+/// Fail-closed render-plan construction used by preview, export, and agents.
+pub fn try_build_render_plan(
+    timeline: &Timeline,
+    render_size: RenderSize,
+    sources: &dyn SourceMetrics,
+) -> Result<RenderPlan, String> {
+    timeline.validate_nested_sequences()?;
+    validate_nested_render_constraints(timeline)?;
     let total_frames = timeline.total_frames();
     let mut clip_plans: Vec<ClipPlan> = Vec::new();
     let mut text_plans: Vec<ClipPlan> = Vec::new();
+    let mut audio_clips: Vec<AudioClipPlan> = Vec::new();
+
+    let registry: HashMap<&str, &NestedSequence> = timeline
+        .nested_sequences
+        .iter()
+        .map(|sequence| (sequence.id.as_str(), sequence))
+        .collect();
+    collect_timeline_plans(
+        timeline,
+        &registry,
+        0,
+        None,
+        None,
+        &[],
+        &[],
+        render_size,
+        sources,
+        &mut clip_plans,
+        &mut text_plans,
+    );
+    collect_nested_audio(
+        timeline,
+        &registry,
+        0,
+        None,
+        None,
+        false,
+        &[],
+        &mut audio_clips,
+    );
+
+    // Final blend order: bottom-to-top. Upstream keeps visual track 0 topmost,
+    // so higher track indexes draw first and lower indexes draw last.
+    clip_plans.sort_by(|a, b| {
+        b.blend_path
+            .cmp(&a.blend_path)
+            .then(a.start_frame.cmp(&b.start_frame))
+    });
+
+    Ok(RenderPlan {
+        fps: timeline.fps,
+        render_size,
+        total_frames,
+        clip_plans,
+        text_plans,
+        audio_clips,
+    })
+}
 
+#[allow(clippy::too_many_arguments)]
+fn collect_timeline_plans(
+    timeline: &Timeline,
+    registry: &HashMap<&str, &NestedSequence>,
+    frame_offset: i32,
+    parent_start: Option<i32>,
+    parent_end: Option<i32>,
+    parent_blend_path: &[usize],
+    compound_ancestors: &[CompoundAncestor],
+    render_size: RenderSize,
+    sources: &dyn SourceMetrics,
+    clip_plans: &mut Vec<ClipPlan>,
+    text_plans: &mut Vec<ClipPlan>,
+) {
     for (track_index, track) in timeline.tracks.iter().enumerate() {
         if track.hidden {
             continue;
@@ -167,17 +281,79 @@ pub fn build_render_plan(
         order.sort_by_key(|&i| track.clips[i].start_frame);
 
         let mut prev_end_frame = i32::MIN;
+        let mut blend_path = parent_blend_path.to_vec();
+        blend_path.push(track_index);
         for &clip_index in &order {
             let clip = &track.clips[clip_index];
 
+            let unclamped_start = frame_offset.saturating_add(clip.start_frame);
+            let absolute_start = unclamped_start.max(parent_start.unwrap_or(i32::MIN));
+            let absolute_end = frame_offset
+                .saturating_add(clip.end_frame())
+                .min(parent_end.unwrap_or(i32::MAX));
+            if absolute_end <= absolute_start {
+                continue;
+            }
+
+            let clipped_left = absolute_start - unclamped_start;
+            let effective_trim_start = clip
+                .trim_start_frame
+                .saturating_add((clipped_left as f64 * clip.speed).round() as i32);
+            let mut mapped_clip = clip.clone();
+            mapped_clip.start_frame = unclamped_start;
+
+            // Apply the same overlap policy to compound and ordinary visual
+            // clips before recursively expanding the selected compound.
+            if clip.media_type != ClipType::Text {
+                if clip.duration_frames <= 0 || clip.start_frame < prev_end_frame {
+                    continue;
+                }
+                prev_end_frame = clip.end_frame();
+            }
+
+            if let Some(sequence_id) = clip.nested_sequence_id.as_deref() {
+                let sequence = registry
+                    .get(sequence_id)
+                    .expect("validated nested reference must exist");
+                let mut child_ancestors = compound_ancestors.to_vec();
+                child_ancestors.push(CompoundAncestor {
+                    clip: mapped_clip,
+                    // Flattened leaves are already projected into the output
+                    // canvas' normalized coordinate space. Compound transforms
+                    // therefore operate on that output canvas as their source;
+                    // using the authored child pixel size here would scale the
+                    // same normalization a second time.
+                    canvas_size: (render_size.width_f(), render_size.height_f()),
+                });
+                collect_timeline_plans(
+                    &sequence.timeline,
+                    registry,
+                    absolute_start.saturating_sub(effective_trim_start),
+                    Some(absolute_start),
+                    Some(absolute_end),
+                    &blend_path,
+                    &child_ancestors,
+                    render_size,
+                    sources,
+                    clip_plans,
+                    text_plans,
+                );
+                continue;
+            }
+
             if clip.media_type == ClipType::Text {
                 // Text: no overlap skip, no audio gate; each text clip stands
                 // alone (SPEC §4.2). Defensive: require a positive span.
                 if clip.duration_frames > 0 {
                     text_plans.push(make_clip_plan(
-                        clip,
+                        &mapped_clip,
                         track_index,
                         clip_index,
+                        blend_path.clone(),
+                        compound_ancestors.to_vec(),
+                        absolute_start,
+                        absolute_end,
+                        effective_trim_start,
                         sources,
                         render_size,
                     ));
@@ -191,34 +367,143 @@ pub fn build_render_plan(
             }
 
             // Video-track de-dup (upstream L152 / L424).
-            if clip.duration_frames <= 0 || clip.start_frame < prev_end_frame {
-                continue;
-            }
             clip_plans.push(make_clip_plan(
-                clip,
+                &mapped_clip,
                 track_index,
                 clip_index,
+                blend_path.clone(),
+                compound_ancestors.to_vec(),
+                absolute_start,
+                absolute_end,
+                effective_trim_start,
                 sources,
                 render_size,
             ));
-            prev_end_frame = clip.end_frame();
         }
     }
+}
 
-    // Final blend order: bottom-to-top. Upstream keeps visual track 0 topmost,
-    // so higher track indexes draw first and lower indexes draw last.
-    clip_plans.sort_by(|a, b| {
-        b.track_index
-            .cmp(&a.track_index)
-            .then(a.start_frame.cmp(&b.start_frame))
-    });
+fn validate_nested_render_constraints(timeline: &Timeline) -> Result<(), String> {
+    let mut timelines = Vec::with_capacity(timeline.nested_sequences.len() + 1);
+    timelines.push(timeline);
+    timelines.extend(
+        timeline
+            .nested_sequences
+            .iter()
+            .map(|sequence| &sequence.timeline),
+    );
+    let compound_ids = timelines
+        .iter()
+        .flat_map(|candidate| candidate.tracks.iter())
+        .flat_map(|track| &track.clips)
+        .filter(|clip| clip.nested_sequence_id.is_some())
+        .map(|clip| clip.id.as_str())
+        .collect::<HashSet<_>>();
+    for candidate in timelines {
+        for clip in candidate.tracks.iter().flat_map(|track| &track.clips) {
+            if clip
+                .transition_out
+                .as_ref()
+                .is_some_and(|transition| compound_ids.contains(transition.to_clip_id.as_str()))
+            {
+                return Err(format!(
+                    "transition into compound clip {} requires offscreen nesting",
+                    clip.transition_out
+                        .as_ref()
+                        .expect("transition was matched")
+                        .to_clip_id
+                ));
+            }
+        }
+        for clip in candidate
+            .tracks
+            .iter()
+            .flat_map(|track| track.clips.iter())
+            .filter(|clip| clip.nested_sequence_id.is_some())
+        {
+            if (clip.speed - 1.0).abs() > f64::EPSILON || clip.reversed {
+                return Err(format!(
+                    "compound clip {} must use forward 1x playback",
+                    clip.id
+                ));
+            }
+            if clip.crop != Default::default()
+                || clip.crop_track.is_some()
+                || clip.color_grade.is_some()
+                || clip.chroma_key.is_some()
+                || !clip.masks.is_empty()
+                || !clip.effects.is_empty()
+                || clip.transition_out.is_some()
+            {
+                return Err(format!(
+                    "compound clip {} uses effects that require offscreen nesting",
+                    clip.id
+                ));
+            }
+        }
+    }
+    Ok(())
+}
 
-    RenderPlan {
-        fps: timeline.fps,
-        render_size,
-        total_frames,
-        clip_plans,
-        text_plans,
+#[allow(clippy::too_many_arguments)]
+fn collect_nested_audio(
+    timeline: &Timeline,
+    registry: &HashMap<&str, &NestedSequence>,
+    frame_offset: i32,
+    parent_start: Option<i32>,
+    parent_end: Option<i32>,
+    parent_muted: bool,
+    compound_ancestors: &[Clip],
+    audio_clips: &mut Vec<AudioClipPlan>,
+) {
+    for track in &timeline.tracks {
+        let muted = parent_muted || track.muted;
+        for clip in &track.clips {
+            let unclamped_start = frame_offset.saturating_add(clip.start_frame);
+            let absolute_start = unclamped_start.max(parent_start.unwrap_or(i32::MIN));
+            let absolute_end = frame_offset
+                .saturating_add(clip.end_frame())
+                .min(parent_end.unwrap_or(i32::MAX));
+            if absolute_end <= absolute_start {
+                continue;
+            }
+            let clipped_left = absolute_start - unclamped_start;
+            let effective_trim_start = clip
+                .trim_start_frame
+                .saturating_add((clipped_left as f64 * clip.speed).round() as i32);
+            let mut mapped_gain_clip = clip.clone();
+            mapped_gain_clip.start_frame = unclamped_start;
+            if let Some(sequence_id) = clip.nested_sequence_id.as_deref() {
+                let sequence = registry
+                    .get(sequence_id)
+                    .expect("validated nested reference must exist");
+                let mut child_ancestors = compound_ancestors.to_vec();
+                child_ancestors.push(mapped_gain_clip);
+                collect_nested_audio(
+                    &sequence.timeline,
+                    registry,
+                    absolute_start.saturating_sub(effective_trim_start),
+                    Some(absolute_start),
+                    Some(absolute_end),
+                    muted,
+                    &child_ancestors,
+                    audio_clips,
+                );
+                continue;
+            }
+            if muted || !matches!(clip.media_type, ClipType::Audio | ClipType::Video) {
+                continue;
+            }
+            let mut flattened = clip.clone();
+            flattened.start_frame = absolute_start;
+            flattened.duration_frames = absolute_end - absolute_start;
+            flattened.trim_start_frame = effective_trim_start;
+            audio_clips.push(AudioClipPlan {
+                clip: flattened,
+                gain_clip: mapped_gain_clip,
+                compound_ancestors: compound_ancestors.to_vec(),
+            });
+        }
     }
 }
 
@@ -276,7 +561,10 @@ fn eval_layer<'a>(
     if f < plan.start_frame || f >= plan.end_frame {
         return None;
     }
-    let opacity = clip.opacity_at(f);
+    let mut opacity = clip.opacity_at(f);
+    for ancestor in plan.compound_ancestors.iter().rev() {
+        opacity *= ancestor.clip.opacity_at(f);
+    }
     if opacity <= 0.0 {
         return None; // behavior-equivalent skip (SPEC §2.4 step 3).
     }
@@ -285,15 +573,18 @@ fn eval_layer<'a>(
     // path uses `clip.transformAt(frame)` (which rebuilds top-left/size/rotation
     // and intentionally drops flip — matching domain `transform_at`). Replicate
     // that split so flip behaves exactly as upstream.
-    let transform = if clip.has_transform_animation() {
-        clip.transform_at(f)
-    } else {
-        clip.transform
-    };
-    let affine = compose(
+    let transform = evaluated_transform(clip, f, render_size);
+    let mut affine = compose(
         plan.preferred_transform,
         affine_transform(&transform, plan.nat_size, render_size),
     );
+    for ancestor in plan.compound_ancestors.iter().rev() {
+        let transform = evaluated_transform(&ancestor.clip, f, render_size);
+        affine = compose(
+            affine,
+            affine_transform(&transform, ancestor.canvas_size, render_size),
+        );
+    }
     let crop_uv = crop_to_uv(clip.crop_at(f));
     let source_frame = source_frame_index(plan, f);
 
@@ -310,6 +601,54 @@ fn eval_layer<'a>(
         needs_premultiply: plan.needs_premultiply,
         clip_id: &plan.clip_id,
         color_grade: plan.color_grade.as_ref(),
+        lut: plan.lut.as_ref(),
+        chroma_key: plan.chroma_key.as_ref(),
+        masks: &plan.masks,
+        effects: &plan.effects,
+    })
+}
+
+/// Evaluate the incoming side of a cross dissolve before its nominal timeline
+/// start. The first source frame is held during the dissolve, then regular
+/// playback begins at the cut; this avoids reading outside the clip's source
+/// window while preserving timeline duration and adjacency.
+fn eval_transition_incoming<'a>(
+    plan: &'a ClipPlan,
+    clip: &Clip,
+    progress: f64,
+    render_size: RenderSize,
+) -> Option<LayerDraw<'a>> {
+    let sample_frame = plan.start_frame;
+    let mut opacity = clip.raw_opacity_at(sample_frame) * progress.clamp(0.0, 1.0);
+    for ancestor in plan.compound_ancestors.iter().rev() {
+        opacity *= ancestor.clip.opacity_at(sample_frame);
+    }
+    if opacity <= 0.0 {
+        return None;
+    }
+    let transform = evaluated_transform(clip, sample_frame, render_size);
+    let mut affine = compose(
+        plan.preferred_transform,
+        affine_transform(&transform, plan.nat_size, render_size),
+    );
+    for ancestor in plan.compound_ancestors.iter().rev() {
+        let transform = evaluated_transform(&ancestor.clip, sample_frame, render_size);
+        affine = compose(
+            affine,
+            affine_transform(&transform, ancestor.canvas_size, render_size),
+        );
+    }
+    Some(LayerDraw {
+        source: &plan.source,
+        source_frame: source_frame_index(plan, sample_frame),
+        affine,
+        nat_size: plan.nat_size,
+        crop_uv: crop_to_uv(clip.crop_at(sample_frame)),
+        opacity,
+        needs_premultiply: plan.needs_premultiply,
+        clip_id: &plan.clip_id,
+        color_grade: plan.color_grade.as_ref(),
+        lut: plan.lut.as_ref(),
         chroma_key: plan.chroma_key.as_ref(),
         masks: &plan.masks,
         effects: &plan.effects,
@@ -322,21 +661,51 @@ impl RenderPlan {
     /// `timeline` must be the same one the plan was built from (they share clip
     /// indices). Video clips composite first; text clips composite last (on
     /// top), matching upstream's text-over-video layering (SPEC §4.2).
-    pub fn frame<'a>(&'a self, timeline: &'a Timeline, f: i32) -> FramePlan<'a> {
+    pub fn frame<'a>(&'a self, _timeline: &'a Timeline, f: i32) -> FramePlan<'a> {
         let mut draws: Vec<LayerDraw<'a>> = Vec::new();
 
-        for plan in &self.clip_plans {
-            let Some(clip) = clip_for(timeline, plan) else {
-                continue;
-            };
+        for (index, plan) in self.clip_plans.iter().enumerate() {
+            let clip = &plan.clip;
+            let transition = clip.transition_out.as_ref().and_then(|transition| {
+                let incoming_plan = self.clip_plans.get(index + 1)?;
+                if transition.kind != TransitionKind::CrossDissolve
+                    || (!transition.from_clip_id.is_empty()
+                        && transition.from_clip_id != plan.clip_id)
+                    || incoming_plan.track_index != plan.track_index
+                    || incoming_plan.clip_id != transition.to_clip_id
+                    || incoming_plan.start_frame != plan.end_frame
+                {
+                    return None;
+                }
+                let incoming = &incoming_plan.clip;
+                let duration = transition
+                    .duration_frames
+                    .max(1)
+                    .min(clip.duration_frames.max(1))
+                    .min(incoming.duration_frames.max(1));
+                let start = plan.end_frame - duration;
+                if f < start || f >= plan.end_frame {
+                    return None;
+                }
+                let progress = (f - start) as f64 / duration as f64;
+                Some((incoming_plan, incoming, progress))
+            });
+
             if let Some(d) = eval_layer(plan, clip, f, self.render_size) {
-                draws.push(d);
+                if d.opacity > 0.0 {
+                    draws.push(d);
+                }
+            }
+            if let Some((incoming_plan, incoming, progress)) = transition {
+                if let Some(d) =
+                    eval_transition_incoming(incoming_plan, incoming, progress, self.render_size)
+                {
+                    draws.push(d);
+                }
             }
         }
         for plan in &self.text_plans {
-            let Some(clip) = clip_for(timeline, plan) else {
-                continue;
-            };
+            let clip = &plan.clip;
             if let Some(d) = eval_layer(plan, clip, f, self.render_size) {
                 draws.push(d);
             }
@@ -348,19 +717,3 @@ impl RenderPlan {
         }
     }
 }
-
-/// Resolve the `&Clip` for a plan via its stored indices, falling back to an id
-/// search if the indices no longer line up (defensive; the indexed path is the
-/// fast one per SPEC §2.4).
-fn clip_for<'a>(timeline: &'a Timeline, plan: &ClipPlan) -> Option<&'a Clip> {
-    if let Some(track) = timeline.tracks.get(plan.track_index) {
-        if let Some(clip) = track.clips.get(plan.clip_index) {
-            if clip.id == plan.clip_id {
-                return Some(clip);
-            }
-        }
-        // Indices drifted: fall back to id lookup within the track.
-        return track.clips.iter().find(|c| c.id == plan.clip_id);
-    }
-    None
-}
diff --git a/crates/opentake-render/src/plan/mod.rs b/crates/opentake-render/src/plan/mod.rs
index e5a2cb68..f0c7aedf 100644
--- a/crates/opentake-render/src/plan/mod.rs
+++ b/crates/opentake-render/src/plan/mod.rs
@@ -10,5 +10,8 @@ pub mod types;
 mod tests;
 
 pub use affine::{affine_transform, compose, crop_to_uv};
-pub use build::{build_render_plan, source_frame_index};
-pub use types::{ClipPlan, FramePlan, LayerDraw, RenderPlan, RenderSize, TextureSource};
+pub use build::{build_render_plan, source_frame_index, try_build_render_plan};
+pub use types::{
+    AudioClipPlan, ClipPlan, CompoundAncestor, FramePlan, LayerDraw, RenderPlan, RenderSize,
+    TextureSource,
+};
diff --git a/crates/opentake-render/src/plan/tests.rs b/crates/opentake-render/src/plan/tests.rs
index d37984a1..d17d079b 100644
--- a/crates/opentake-render/src/plan/tests.rs
+++ b/crates/opentake-render/src/plan/tests.rs
@@ -3,7 +3,7 @@
 
 use opentake_domain::{
     AnimPair, Clip, ClipType, Crop, Interpolation, Keyframe, KeyframeTrack, Point, Timeline, Track,
-    Transform,
+    Transform, Transition, TransitionKind,
 };
 
 use super::affine::affine_transform;
@@ -76,6 +76,36 @@ const RS: RenderSize = RenderSize {
     height: 1080,
 };
 
+#[test]
+fn cross_dissolve_emits_two_weighted_layers_before_the_cut() {
+    let mut a = video_clip("a", 0, 30);
+    a.transition_out = Some(Transition {
+        from_clip_id: "a".into(),
+        to_clip_id: "b".into(),
+        kind: TransitionKind::CrossDissolve,
+        duration_frames: 10,
+    });
+    let b = video_clip("b", 30, 30);
+    let mut tl = Timeline::new();
+    let mut track = Track::new("v", ClipType::Video);
+    track.clips = vec![a, b];
+    tl.tracks.push(track);
+    let plan = build_render_plan(&tl, RS, &TestMetrics::default());
+
+    let midpoint = plan.frame(&tl, 25);
+    assert_eq!(midpoint.draws.len(), 2);
+    assert_eq!(midpoint.draws[0].clip_id, "a");
+    assert_eq!(midpoint.draws[1].clip_id, "b");
+    approx(midpoint.draws[0].opacity, 1.0);
+    approx(midpoint.draws[1].opacity, 0.5);
+    assert_eq!(midpoint.draws[1].source_frame, 0);
+
+    let after_cut = plan.frame(&tl, 30);
+    assert_eq!(after_cut.draws.len(), 1);
+    assert_eq!(after_cut.draws[0].clip_id, "b");
+    approx(after_cut.draws[0].opacity, 1.0);
+}
+
 // --- Single clip, no transform: full-canvas identity-ish affine ---
 
 #[test]
diff --git a/crates/opentake-render/src/plan/types.rs b/crates/opentake-render/src/plan/types.rs
index a4635e87..3d78a36a 100644
--- a/crates/opentake-render/src/plan/types.rs
+++ b/crates/opentake-render/src/plan/types.rs
@@ -13,7 +13,7 @@
 //! The black background is NOT a clip here — it is the compositor clear color
 //! `(0,0,0,1)` (SPEC §3.5).
 
-use opentake_domain::{ChromaKey, ClipType, ColorGrade, Effect, Mask};
+use opentake_domain::{ChromaKey, Clip, ClipType, ColorGrade, Effect, LutReference, Mask};
 
 /// Canvas pixel size (already even-ized; see [`crate::size`]).
 #[derive(Clone, Copy, PartialEq, Eq, Debug)]
@@ -51,21 +51,57 @@ pub enum TextureSource {
     Image { media_ref: String },
     /// Lottie: a texture per "Lottie internal frame" (content-hash cached).
     Lottie { media_ref: String },
-    /// Text: rasterized for this clip at the canvas size (content-hash cached,
-    /// key = style + content + canvas).
+    /// Text clip identity: rasterized at the canvas size. The resolver reads
+    /// content/style from the same timeline snapshot and includes style,
+    /// content, and canvas in its cache key, so an edited clip cannot reuse
+    /// stale pixels based on id alone.
     Text { clip_id: String },
 }
 
+/// One compound clip surrounding a flattened leaf, plus the child canvas size
+/// that clip transforms as its source.
+#[derive(Clone, PartialEq, Debug)]
+pub struct CompoundAncestor {
+    pub clip: Clip,
+    pub canvas_size: (f64, f64),
+}
+
+/// One audio-bearing leaf projected into root timeline coordinates. `clip`
+/// owns the visible source window used for decode/placement, while `gain_clip`
+/// and `compound_ancestors` retain unclipped timing for frame-accurate volume
+/// keyframe and fade sampling.
+#[derive(Clone, PartialEq, Debug)]
+pub struct AudioClipPlan {
+    pub clip: Clip,
+    pub gain_clip: Clip,
+    pub compound_ancestors: Vec<Clip>,
+}
+
+impl AudioClipPlan {
+    pub fn volume_at(&self, frame: i32) -> f64 {
+        self.compound_ancestors
+            .iter()
+            .fold(self.gain_clip.volume_at(frame), |gain, ancestor| {
+                gain * ancestor.volume_at(frame)
+            })
+    }
+}
+
 /// Static (frame-independent) render description for one clip.
 #[derive(Clone, PartialEq, Debug)]
 pub struct ClipPlan {
+    /// Immutable clip snapshot owned by this plan. This lets recursively
+    /// flattened nested clips use the exact same plan in preview and export
+    /// without indexing back into a different timeline tree.
+    pub clip: Clip,
     pub clip_id: String,
-    /// Index of the timeline track this clip belongs to (blend order; SPEC §1.5).
+    /// Flattened track index retained for diagnostics and compatibility.
     pub track_index: usize,
-    /// Index of the clip inside `timeline.tracks[track_index].clips`, so
-    /// [`RenderPlan::frame`](crate::plan::RenderPlan::frame) can fetch the `&Clip`
-    /// without a string search (SPEC §2.4 note).
+    /// Index of the source clip inside its immediate timeline track.
     pub clip_index: usize,
+    /// Root-to-leaf track path used for deterministic nested blend order.
+    pub blend_path: Vec<usize>,
+    pub compound_ancestors: Vec<CompoundAncestor>,
     pub source: TextureSource,
     pub start_frame: i32,
     /// Half-open end (`start_frame + duration_frames`).
@@ -96,6 +132,8 @@ pub struct ClipPlan {
     // shader; the pure pixel math lives in `opentake_domain::grade`.
     /// Linear-light color grade, or `None` when the clip has no grade.
     pub color_grade: Option<ColorGrade>,
+    /// Project-managed 3D LUT applied after the primary grade.
+    pub lut: Option<LutReference>,
     /// Chroma key, or `None` when the clip has no keying.
     pub chroma_key: Option<ChromaKey>,
     /// Vector masks (intersected coverage). Empty = no masking.
@@ -121,6 +159,10 @@ pub struct RenderPlan {
     /// ExportService L237-248; SPEC §4.2). Ordered by appearance, NOT deduped
     /// per track (upstream collects text clips without the per-track skip rule).
     pub text_plans: Vec<ClipPlan>,
+    /// Audio-bearing leaf clips flattened through the same nested timing map.
+    /// Export consumes this list so compound preview/video and audio share
+    /// identical in/out boundaries.
+    pub audio_clips: Vec<AudioClipPlan>,
 }
 
 /// One draw after evaluating a single frame (instantaneous).
@@ -153,6 +195,8 @@ pub struct LayerDraw<'a> {
     /// Color grade applied in-shader (linear-light chain), borrowed from the
     /// [`ClipPlan`]. `None` = no grade.
     pub color_grade: Option<&'a ColorGrade>,
+    /// Project-managed 3D LUT applied after the primary grade.
+    pub lut: Option<&'a LutReference>,
     /// Chroma key applied in-shader, borrowed from the [`ClipPlan`]. `None` = none.
     pub chroma_key: Option<&'a ChromaKey>,
     /// Masks applied in-shader (intersected coverage), borrowed from the
diff --git a/crates/opentake-render/tests/composite_acceptance.rs b/crates/opentake-render/tests/composite_acceptance.rs
new file mode 100644
index 00000000..a9361659
--- /dev/null
+++ b/crates/opentake-render/tests/composite_acceptance.rs
@@ -0,0 +1,163 @@
+const EVIDENCE: &str = include_str!(
+    "../../../docs/audit/2026-07-14/runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md"
+);
+const GPU_CHILDREN: &str = include_str!("gpu_effects.rs");
+const COMPOSITOR: &str = include_str!("../src/gpu/compositor.rs");
+const RENDER_OVERVIEW: &str = include_str!("../../../docs/modules/opentake-render/OVERVIEW.md");
+const MEDIA_PRINCIPLES: &str = include_str!("../../../docs/specs/media/0-principles.md");
+const MEDIA_DOMAIN_CONTRACT: &str = include_str!("../../../docs/specs/media/9-domain-contract.md");
+const MEDIA_FFMPEG_CHILDREN: &str =
+    include_str!("../../opentake-media/tests/ffmpeg_integration.rs");
+const MEDIA_ENGINE_SOURCE: &str = include_str!("../../opentake-media/src/lib.rs");
+const MEDIA_INDEX_SOURCE: &str = include_str!("../../opentake-media/src/index_coordinator.rs");
+
+use opentake_domain::{
+    Clip, ClipType, Effect, Mask, MaskShape, Point2, Timeline, Track, MAX_MASKS_PER_CLIP,
+    MAX_POLYGON_MASK_POINTS,
+};
+use opentake_ops::{apply, EditCommand, EditError, EditorState, SeqIdGen};
+
+#[test]
+fn hdr_proxy_account_children_close_one_composite_acceptance() {
+    let evidence = EVIDENCE.replace("\r\n", "\n");
+    for child in [
+        "HDR child result: **PASS**",
+        "Proxy child result: **PASS**",
+        "Account child result: **PASS**",
+    ] {
+        assert!(evidence.contains(child), "missing child evidence: {child}");
+    }
+    assert!(evidence.contains("`HDR child PASS + proxy child PASS + account child PASS`"));
+    assert!(evidence.contains("closes one composite\nacceptance"));
+    assert!(evidence.contains("codesign --verify --deep --strict"));
+    assert!(evidence.contains("This is not\nan HDR-passthrough claim."));
+    assert!(evidence.contains("Export therefore used the original source, not the enabled proxy."));
+    assert!(evidence.contains("Local editing remains the default"));
+}
+
+fn state_with_visual_clip() -> EditorState {
+    let mut timeline = Timeline::new();
+    let mut track = Track::new("video", ClipType::Video);
+    track.clips.push(Clip::new("clip", "asset", 0, 30));
+    timeline.tracks.push(track);
+    EditorState::from_timeline(timeline)
+}
+
+#[test]
+fn mask_and_effect_records_have_separate_child_owners() {
+    // The mixed audit record is closed by two executable pixel owners, rather
+    // than by duplicating either renderer in this aggregation test.
+    for owner in [
+        "linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export",
+        "advertised_effect_registry_has_preview_export_golden_fixtures",
+    ] {
+        assert!(
+            GPU_CHILDREN.contains(owner),
+            "missing executable child owner: {owner}"
+        );
+    }
+    for boundary in [
+        "fn pack_masks",
+        "MAX_POLYGON_MASK_POINTS",
+        "fn pack_effects",
+        "validate_effect_chain(draw.effects)",
+    ] {
+        assert!(
+            COMPOSITOR.contains(boundary),
+            "missing compositor boundary: {boundary}"
+        );
+    }
+
+    // Authored overflow and unknown registry entries fail before mutation.
+    let ids = SeqIdGen::default();
+    let mut state = state_with_visual_clip();
+    let original = state.timeline.clone();
+    let too_many = vec![Mask::default(); MAX_MASKS_PER_CLIP + 1];
+    let error = apply(
+        &mut state,
+        EditCommand::SetMasks {
+            clip_ids: vec!["clip".into()],
+            masks: too_many,
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(matches!(error, EditError::Invalid(message) if message.contains("at most")));
+    assert_eq!(state.timeline, original);
+    assert_eq!(state.undo_depth(), 0);
+
+    let polygon = Mask {
+        shape: MaskShape::Poly {
+            points: vec![Point2::new(0.5, 0.5); MAX_POLYGON_MASK_POINTS + 1],
+        },
+        ..Mask::default()
+    };
+    let error = apply(
+        &mut state,
+        EditCommand::SetMasks {
+            clip_ids: vec!["clip".into()],
+            masks: vec![polygon],
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(matches!(error, EditError::Invalid(message) if message.contains("polygon")));
+    assert_eq!(state.timeline, original);
+
+    let error = apply(
+        &mut state,
+        EditCommand::SetEffects {
+            clip_ids: vec!["clip".into()],
+            effects: vec![Effect::new("unadvertised")],
+        },
+        &ids,
+    )
+    .unwrap_err();
+    assert!(matches!(error, EditError::Invalid(message) if message.contains("unknown effect")));
+    assert_eq!(state.timeline, original);
+
+    assert!(RENDER_OVERVIEW.contains("多边形（钢笔）蒙版与通用 Effect 链已落地"));
+    assert!(!RENDER_OVERVIEW.contains("编码为全画布 no-op"));
+}
+
+#[test]
+fn media_principles_headings_reference_exact_child_capabilities() {
+    assert!(MEDIA_PRINCIPLES.starts_with("# 设计原则与移植铁律(本 crate 必须遵守)"));
+    assert!(MEDIA_DOMAIN_CONTRACT.starts_with("# 跨平台与合规要点"));
+    for document in [MEDIA_PRINCIPLES, MEDIA_DOMAIN_CONTRACT] {
+        assert!(document.contains("可执行子能力集合"));
+        for child in [
+            "probe_reports_dimensions_fps_and_audio",
+            "decode_frame_returns_rgba_of_expected_size",
+            "extract_pcm_yields_16k_mono",
+            "waveform_has_expected_bucket_count",
+            "encode_roundtrip_produces_playable_video",
+            "export_pause_ref_counts",
+        ] {
+            assert!(document.contains(child), "missing child reference: {child}");
+        }
+    }
+
+    for child in [
+        "fn probe_reports_dimensions_fps_and_audio",
+        "fn decode_frame_returns_rgba_of_expected_size",
+        "fn extract_pcm_yields_16k_mono",
+        "fn waveform_has_expected_bucket_count",
+        "fn encode_roundtrip_produces_playable_video",
+    ] {
+        assert!(
+            MEDIA_FFMPEG_CHILDREN.contains(child),
+            "missing executable media child: {child}"
+        );
+    }
+    assert!(MEDIA_ENGINE_SOURCE.contains("seconds (f64) at every IO"));
+    assert!(MEDIA_ENGINE_SOURCE.contains("pub struct MediaEngine"));
+    assert!(MEDIA_INDEX_SOURCE.contains("fn export_pause_ref_counts"));
+
+    // The compliance collection must describe the actual subprocess-sidecar
+    // architecture and preserve the known release blocker instead of claiming
+    // dynamic linking or a completed public distribution review.
+    assert!(MEDIA_DOMAIN_CONTRACT.contains("FFmpeg 子进程 sidecar"));
+    assert!(MEDIA_DOMAIN_CONTRACT.contains("Beta 发布阻塞"));
+    assert!(!MEDIA_DOMAIN_CONTRACT.contains("动态链接 + NOTICE"));
+}
diff --git a/crates/opentake-render/tests/compound_render.rs b/crates/opentake-render/tests/compound_render.rs
new file mode 100644
index 00000000..440ea7a0
--- /dev/null
+++ b/crates/opentake-render/tests/compound_render.rs
@@ -0,0 +1,128 @@
+use opentake_domain::{Clip, ClipType, NestedSequence, Timeline, Track};
+use opentake_render::{try_build_render_plan, RenderSize, SourceMetrics};
+
+struct Metrics;
+
+impl SourceMetrics for Metrics {
+    fn natural_size(&self, _media_ref: &str) -> Option<(u32, u32)> {
+        Some((64, 64))
+    }
+}
+
+fn video_track(id: &str, clips: Vec<Clip>) -> Track {
+    let mut track = Track::new(id, ClipType::Video);
+    track.clips = clips;
+    track
+}
+
+#[test]
+fn compound_clip_preview_export_frames_match() {
+    let mut leaf = Clip::new("leaf", "asset-a", 3, 10);
+    leaf.trim_start_frame = 2;
+    let mut sequence_b = Timeline::new();
+    sequence_b.tracks = vec![video_track("b-track", vec![leaf])];
+
+    let mut nested_b = Clip::new_nested("nested-b", "sequence-b", 5, 8);
+    nested_b.trim_start_frame = 3;
+    let mut sequence_a = Timeline::new();
+    sequence_a.tracks = vec![video_track("a-track", vec![nested_b])];
+
+    let mut root = Timeline::new();
+    root.nested_sequences = vec![
+        NestedSequence::new("sequence-a", "A", sequence_a),
+        NestedSequence::new("sequence-b", "B", sequence_b),
+    ];
+    let mut compound = Clip::new_nested("compound", "sequence-a", 20, 6);
+    compound.trim_start_frame = 5;
+    compound.opacity = 0.5;
+    compound.transform.width = 0.5;
+    compound.transform.height = 0.5;
+    root.tracks = vec![video_track("root-track", vec![compound])];
+
+    let preview = try_build_render_plan(&root, RenderSize::new(64, 64), &Metrics).unwrap();
+    let export = try_build_render_plan(&root, RenderSize::new(64, 64), &Metrics).unwrap();
+    for frame in 19..=27 {
+        assert_eq!(preview.frame(&root, frame), export.frame(&root, frame));
+    }
+    assert!(preview.frame(&root, 19).draws.is_empty());
+    assert_eq!(preview.frame(&root, 20).draws[0].source_frame, 2);
+    assert_eq!(preview.frame(&root, 20).draws[0].opacity, 0.5);
+    assert_eq!(
+        preview.frame(&root, 20).draws[0].affine,
+        [0.5, 0.0, 0.0, 0.5, 16.0, 16.0]
+    );
+    assert_eq!(preview.frame(&root, 25).draws[0].source_frame, 7);
+    assert!(preview.frame(&root, 26).draws.is_empty());
+}
+
+#[test]
+fn compound_trim_preserves_inner_fade_sampling_offset() {
+    let mut leaf = Clip::new("leaf", "asset-a", 0, 20);
+    leaf.fade_in_frames = 20;
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track("child-track", vec![leaf])];
+
+    let mut root = Timeline::new();
+    root.nested_sequences
+        .push(NestedSequence::new("sequence", "Sequence", child));
+    let mut compound = Clip::new_nested("compound", "sequence", 100, 5);
+    compound.trim_start_frame = 10;
+    root.tracks = vec![video_track("root-track", vec![compound])];
+
+    let plan = try_build_render_plan(&root, RenderSize::new(64, 64), &Metrics).unwrap();
+    let first = &plan.frame(&root, 100).draws[0];
+    assert_eq!(first.source_frame, 10);
+    assert_eq!(first.opacity, 0.5);
+}
+
+#[test]
+fn unsupported_compound_retime_fails_before_preview_or_export() {
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track(
+        "child-track",
+        vec![Clip::new("leaf", "asset-a", 0, 10)],
+    )];
+    let mut root = Timeline::new();
+    root.nested_sequences
+        .push(NestedSequence::new("sequence", "Sequence", child));
+    let mut compound = Clip::new_nested("compound", "sequence", 0, 10);
+    compound.speed = 2.0;
+    root.tracks = vec![video_track("root-track", vec![compound])];
+
+    assert_eq!(
+        try_build_render_plan(&root, RenderSize::new(64, 64), &Metrics).unwrap_err(),
+        "compound clip compound must use forward 1x playback"
+    );
+}
+
+#[test]
+fn compound_audio_uses_the_same_trimmed_root_span() {
+    let mut audio = Clip::new("audio", "asset-a", 4, 10);
+    audio.media_type = ClipType::Audio;
+    audio.source_clip_type = ClipType::Audio;
+    audio.trim_start_frame = 2;
+    audio.fade_in_frames = 10;
+    let mut child = Timeline::new();
+    child.tracks = vec![video_track("unused", vec![])];
+    let mut audio_track = Track::new("audio-track", ClipType::Audio);
+    audio_track.clips.push(audio);
+    child.tracks.push(audio_track);
+
+    let mut root = Timeline::new();
+    root.nested_sequences
+        .push(NestedSequence::new("sequence", "Sequence", child));
+    let mut compound = Clip::new_nested("compound", "sequence", 20, 5);
+    compound.trim_start_frame = 6;
+    compound.volume = 0.5;
+    compound.fade_in_frames = 5;
+    root.tracks = vec![video_track("root-track", vec![compound])];
+
+    let plan = try_build_render_plan(&root, RenderSize::new(64, 64), &Metrics).unwrap();
+    assert_eq!(plan.audio_clips.len(), 1);
+    let flattened = &plan.audio_clips[0];
+    assert_eq!(flattened.clip.start_frame, 20);
+    assert_eq!(flattened.clip.duration_frames, 5);
+    assert_eq!(flattened.clip.trim_start_frame, 4);
+    assert_eq!(flattened.volume_at(20), 0.0);
+    assert!((flattened.volume_at(22) - 0.08).abs() < 1e-12);
+}
diff --git a/crates/opentake-render/tests/gpu_effects.rs b/crates/opentake-render/tests/gpu_effects.rs
index 5ec32236..91d72380 100644
--- a/crates/opentake-render/tests/gpu_effects.rs
+++ b/crates/opentake-render/tests/gpu_effects.rs
@@ -10,15 +10,16 @@
 use std::rc::Rc;
 
 use opentake_domain::{
-    ChromaKey, Clip, ClipType, ColorGrade, Mask, MaskShape, Point, Point2, Rgb, Timeline, Track,
-    Transform,
+    effect_registry, ChromaKey, Clip, ClipType, ColorGrade, Effect, EffectValidationError,
+    HslSecondary, LiftGammaGain, Mask, MaskShape, MaskTransform, Point, Point2, Rgb, Timeline,
+    Track, Transform,
 };
 use opentake_render::gpu::texture::upload_rgba;
 use opentake_render::source::DecodedFrame;
 use opentake_render::wgpu;
 use opentake_render::{
-    build_render_plan, Compositor, GpuTexture, RenderDevice, RenderSize, SourceMetrics,
-    TextureResolver, TextureSource,
+    build_render_plan, Compositor, GpuTexture, RenderDevice, RenderError, RenderSize,
+    SourceMetrics, TextureResolver, TextureSource,
 };
 
 const RS: RenderSize = RenderSize {
@@ -43,6 +44,39 @@ struct SolidResolver<'d> {
     cached: Option<Rc<GpuTexture>>,
 }
 
+/// Four equal-width chart bars: red, orange, green and blue. This lets the HSL
+/// qualifier test an in-range hue, its feather boundary and two isolated hues
+/// in one real compositor submission.
+struct ColorChartResolver<'d> {
+    device: &'d wgpu::Device,
+    queue: &'d wgpu::Queue,
+    cached: Option<Rc<GpuTexture>>,
+}
+
+impl TextureResolver for ColorChartResolver<'_> {
+    fn resolve(&mut self, _source: &TextureSource, _frame: i64) -> Option<Rc<GpuTexture>> {
+        if self.cached.is_none() {
+            let colors = [
+                [255, 0, 0, 255],
+                [255, 200, 0, 255],
+                [0, 255, 0, 255],
+                [0, 0, 255, 255],
+            ];
+            let mut buf = vec![0u8; 16 * 16 * 4];
+            for y in 0..16 {
+                for x in 0..16 {
+                    let i = (y * 16 + x) * 4;
+                    buf[i..i + 4].copy_from_slice(&colors[x / 4]);
+                }
+            }
+            let frame = DecodedFrame::new(16, 16, buf, true);
+            let tex = upload_rgba(self.device, self.queue, &frame, false, Some("hsl-chart"));
+            self.cached = Some(Rc::new(tex));
+        }
+        self.cached.clone()
+    }
+}
+
 impl TextureResolver for SolidResolver<'_> {
     fn resolve(&mut self, _source: &TextureSource, _frame: i64) -> Option<Rc<GpuTexture>> {
         if self.cached.is_none() {
@@ -118,6 +152,115 @@ fn render(dev: &RenderDevice, tl: &Timeline, rgba: [u8; 4]) -> DecodedFrame {
         .expect("render")
 }
 
+fn render_color_chart(dev: &RenderDevice, tl: &Timeline) -> DecodedFrame {
+    let plan = build_render_plan(tl, RS, &Metrics);
+    let fp = plan.frame(tl, 0);
+    let compositor = Compositor::new(&dev.device);
+    let mut resolver = ColorChartResolver {
+        device: &dev.device,
+        queue: &dev.queue,
+        cached: None,
+    };
+    compositor
+        .render_to_rgba(&dev.device, &dev.queue, RS, &fp, &mut resolver)
+        .expect("render color chart")
+}
+
+#[test]
+fn advertised_effect_registry_has_preview_export_golden_fixtures() {
+    let Some(dev) = device_or_skip("advertised_effect_registry_has_preview_export_golden_fixtures")
+    else {
+        return;
+    };
+
+    let registry = effect_registry();
+    assert_eq!(
+        registry
+            .iter()
+            .map(|effect| effect.name)
+            .collect::<Vec<_>>(),
+        ["grayscale", "sepia", "invert"]
+    );
+
+    // Golden center pixels for a fixed opaque source. Each advertised effect is
+    // exercised at its persisted default and a non-default amount. Preview and
+    // export deliberately render through fresh resolver state and must agree
+    // byte-for-byte.
+    let fixtures = [
+        ("grayscale", None, [81, 81, 81, 255]),
+        ("grayscale", Some(0.4), [164, 50, 140, 255]),
+        ("sepia", None, [144, 128, 99, 255]),
+        ("sepia", Some(0.4), [189, 69, 148, 255]),
+        ("invert", None, [35, 225, 75, 255]),
+        ("invert", Some(0.4), [146, 108, 138, 255]),
+    ];
+    for (name, amount, golden) in fixtures {
+        let mut timeline = full_canvas_timeline();
+        let effect = amount.map_or_else(
+            || Effect::new(name),
+            |value| Effect::new(name).with_param("amount", value),
+        );
+        effect.validate().expect("advertised effect validates");
+        timeline.tracks[0].clips[0].effects = vec![effect];
+
+        let preview = render(&dev, &timeline, [220, 30, 180, 255]);
+        let export = render(&dev, &timeline, [220, 30, 180, 255]);
+        assert_eq!(preview.rgba, export.rgba, "preview/export drift for {name}");
+        let actual = center_pixel(&preview);
+        for channel in 0..4 {
+            assert!(
+                (actual[channel] as i32 - golden[channel]).abs() <= 3,
+                "{name} amount={amount:?}: expected {golden:?}, got {actual:?}"
+            );
+        }
+    }
+
+    // The sequence itself is authored state: changing order must change pixels.
+    let mut first = full_canvas_timeline();
+    first.tracks[0].clips[0].effects = vec![Effect::new("sepia"), Effect::new("invert")];
+    let mut second = full_canvas_timeline();
+    second.tracks[0].clips[0].effects = vec![Effect::new("invert"), Effect::new("sepia")];
+    assert_ne!(
+        center_pixel(&render(&dev, &first, [220, 30, 180, 255])),
+        center_pixel(&render(&dev, &second, [220, 30, 180, 255])),
+        "effect order must be rendered, not stored as inert metadata"
+    );
+
+    // Disabled registered effects remain persisted but are skipped by the
+    // render chain in both preview and export.
+    let source = [220, 30, 180, 255];
+    let mut disabled = full_canvas_timeline();
+    disabled.tracks[0].clips[0].effects = vec![Effect {
+        enabled: false,
+        ..Effect::new("invert")
+    }];
+    let baseline = render(&dev, &full_canvas_timeline(), source);
+    let disabled_preview = render(&dev, &disabled, source);
+    let disabled_export = render(&dev, &disabled, source);
+    assert_eq!(disabled_preview.rgba, baseline.rgba);
+    assert_eq!(disabled_export.rgba, baseline.rgba);
+
+    let mut invalid = full_canvas_timeline();
+    invalid.tracks[0].clips[0].effects = vec![Effect::new("unadvertised")];
+    let plan = build_render_plan(&invalid, RS, &Metrics);
+    let frame_plan = plan.frame(&invalid, 0);
+    let compositor = Compositor::new(&dev.device);
+    let mut resolver = SolidResolver {
+        device: &dev.device,
+        queue: &dev.queue,
+        rgba: [220, 30, 180, 255],
+        cached: None,
+    };
+    let error = compositor
+        .render_to_rgba(&dev.device, &dev.queue, RS, &frame_plan, &mut resolver)
+        .expect_err("unknown effects must fail instead of rendering unchanged");
+    assert!(matches!(
+        error,
+        RenderError::InvalidEffect(EffectValidationError::UnknownEffect { ref name })
+            if name == "unadvertised"
+    ));
+}
+
 #[test]
 fn color_grade_zero_saturation_greyscales() {
     let Some(dev) = device_or_skip("color_grade_zero_saturation_greyscales") else {
@@ -188,6 +331,150 @@ fn color_grade_identity_is_passthrough() {
     }
 }
 
+#[test]
+fn lift_gamma_gain_matches_cpu_reference() {
+    let grade = ColorGrade {
+        lift_gamma_gain: LiftGammaGain {
+            lift: Rgb::new(0.08, -0.03, 0.12),
+            gamma: Rgb::new(1.8, 0.75, 1.25),
+            gain: Rgb::new(0.82, 1.15, 0.93),
+        },
+        ..Default::default()
+    };
+    let source = [96_u8, 128, 192, 255];
+    let linear = source[..3]
+        .iter()
+        .map(|channel| opentake_render::gpu::srgb_to_linear(f64::from(*channel) / 255.0))
+        .collect::<Vec<_>>();
+
+    let source_formula = |x: f64, lift: f64, gamma: f64, gain: f64| {
+        gain * (x + lift * (1.0 - x)).max(0.0).powf(1.0 / gamma)
+    };
+    let expected_linear = [
+        source_formula(linear[0], 0.08, 1.8, 0.82),
+        source_formula(linear[1], -0.03, 0.75, 1.15),
+        source_formula(linear[2], 0.12, 1.25, 0.93),
+    ];
+    let cpu = grade.apply_linear(linear[0], linear[1], linear[2]);
+    for (actual, expected) in [cpu.0, cpu.1, cpu.2].into_iter().zip(expected_linear) {
+        assert!(
+            (actual - expected).abs() < 1e-9,
+            "CPU color-wheel reference drift: expected {expected}, got {actual}"
+        );
+    }
+
+    let Some(dev) = device_or_skip("lift_gamma_gain_matches_cpu_reference") else {
+        return;
+    };
+    let mut timeline = full_canvas_timeline();
+    timeline.tracks[0].clips[0].color_grade = Some(grade);
+    let preview = render(&dev, &timeline, source);
+    let export = render(&dev, &timeline, source);
+    assert_eq!(preview.rgba, export.rgba, "preview/export LGG drift");
+
+    let expected = expected_linear.map(|channel| {
+        (opentake_render::gpu::linear_to_srgb(channel.clamp(0.0, 1.0)) * 255.0).round() as u8
+    });
+    let actual = center_pixel(&preview);
+    for channel in 0..3 {
+        assert!(
+            (i16::from(actual[channel]) - i16::from(expected[channel])).abs() <= 2,
+            "GPU LGG channel {channel}: expected {expected:?}, got {actual:?}"
+        );
+    }
+    assert_eq!(actual[3], 255);
+
+    // A malformed persisted grade is rejected before source resolution or any
+    // GPU submission, so preview/export cannot silently diverge or render an
+    // unchanged frame.
+    let mut invalid = full_canvas_timeline();
+    invalid.tracks[0].clips[0].color_grade = Some(ColorGrade {
+        lift_gamma_gain: LiftGammaGain {
+            gamma: Rgb::new(0.0, 1.0, 1.0),
+            ..Default::default()
+        },
+        ..Default::default()
+    });
+    let invalid_plan = build_render_plan(&invalid, RS, &Metrics);
+    let invalid_frame = invalid_plan.frame(&invalid, 0);
+    let compositor = Compositor::new(&dev.device);
+    let mut resolver = SolidResolver {
+        device: &dev.device,
+        queue: &dev.queue,
+        rgba: source,
+        cached: None,
+    };
+    let error = compositor
+        .render_to_rgba(&dev.device, &dev.queue, RS, &invalid_frame, &mut resolver)
+        .expect_err("zero gamma must be rejected before source resolution");
+    assert!(matches!(
+        error,
+        RenderError::InvalidColorGrade(ref invalid)
+            if invalid.to_string()
+                == "liftGammaGain.gamma.r must be finite and within (0, 4]"
+    ));
+    assert!(
+        resolver.cached.is_none(),
+        "invalid grade resolved source data"
+    );
+}
+
+#[test]
+fn hsl_secondary_hue_boundary_feather_and_isolation() {
+    let grade = ColorGrade {
+        hsl_secondary: Some(HslSecondary {
+            hue_center: 0.0,
+            hue_width: 0.24,
+            feather: 0.08,
+            hue_shift: 0.20,
+            saturation: -0.25,
+            lightness: 0.10,
+        }),
+        ..Default::default()
+    };
+    grade.validate().expect("bounded HSL secondary validates");
+
+    // Persisted authored state must survive a save/reopen boundary exactly.
+    let json = serde_json::to_string(&grade).expect("serialize HSL secondary");
+    let reopened: ColorGrade = serde_json::from_str(&json).expect("reopen HSL secondary");
+    assert_eq!(reopened, grade);
+
+    let Some(dev) = device_or_skip("hsl_secondary_hue_boundary_feather_and_isolation") else {
+        return;
+    };
+    let plain = render_color_chart(&dev, &full_canvas_timeline());
+    let mut timeline = full_canvas_timeline();
+    timeline.tracks[0].clips[0].color_grade = Some(grade);
+    let preview = render_color_chart(&dev, &timeline);
+    let export = render_color_chart(&dev, &timeline);
+    assert_eq!(preview.rgba, export.rgba, "preview/export HSL drift");
+
+    let delta = |x: u32| {
+        let before = pixel_at(&plain, x, 8);
+        let after = pixel_at(&preview, x, 8);
+        before[..3]
+            .iter()
+            .zip(&after[..3])
+            .map(|(a, b)| (i16::from(*a) - i16::from(*b)).unsigned_abs())
+            .max()
+            .unwrap()
+    };
+    let selected_red = delta(2);
+    let feathered_orange = delta(6);
+    let isolated_green = delta(10);
+    let isolated_blue = delta(14);
+    assert!(
+        selected_red > 20,
+        "selected red did not change: {selected_red}"
+    );
+    assert!(
+        feathered_orange > 2 && feathered_orange < selected_red,
+        "orange must receive only the feathered adjustment: red={selected_red}, orange={feathered_orange}"
+    );
+    assert!(isolated_green <= 2, "green leaked by {isolated_green}");
+    assert!(isolated_blue <= 2, "blue leaked by {isolated_blue}");
+}
+
 #[test]
 fn chroma_key_removes_green() {
     let Some(dev) = device_or_skip("chroma_key_removes_green") else {
@@ -238,6 +525,7 @@ fn circle_mask_clips_to_center() {
         },
         feather: 0.0,
         invert: false,
+        ..Mask::default()
     }];
     // White source, masked to a small centered circle over black.
     let frame = render(&dev, &tl, [255, 255, 255, 255]);
@@ -266,6 +554,7 @@ fn inverted_mask_clips_out_center() {
         },
         feather: 0.0,
         invert: true,
+        ..Mask::default()
     }];
     let frame = render(&dev, &tl, [255, 255, 255, 255]);
     // Inverted: center is now masked OUT -> black.
@@ -281,3 +570,116 @@ fn inverted_mask_clips_out_center() {
         "corner kept by inverted mask, got {corner:?}"
     );
 }
+
+#[test]
+fn linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export() {
+    let Some(dev) =
+        device_or_skip("linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export")
+    else {
+        return;
+    };
+    let shapes = [
+        MaskShape::Linear {
+            point: Point2::new(0.45, 0.55),
+            normal: Point2::new(0.8, -0.3),
+        },
+        MaskShape::Circle {
+            center: Point2::new(0.55, 0.45),
+            radius: Point2::new(0.31, 0.22),
+        },
+        MaskShape::Poly {
+            points: vec![
+                Point2::new(0.2, 0.2),
+                Point2::new(0.82, 0.28),
+                Point2::new(0.68, 0.82),
+                Point2::new(0.28, 0.72),
+            ],
+        },
+    ];
+
+    for shape in shapes {
+        for feather in [0.0, 0.18] {
+            let mask = Mask {
+                shape: shape.clone(),
+                feather,
+                invert: feather > 0.0,
+                transform: if matches!(&shape, MaskShape::Poly { .. }) {
+                    MaskTransform {
+                        offset: Point2::new(0.07, -0.04),
+                        scale: Point2::new(0.82, 1.13),
+                        rotation_degrees: 17.0,
+                    }
+                } else {
+                    MaskTransform::default()
+                },
+            };
+            let mut timeline = full_canvas_timeline();
+            timeline.tracks[0].clips[0].masks = vec![mask.clone()];
+
+            // Paused preview and export both consume the same FramePlan and
+            // compositor boundary. Render twice with fresh resolvers to guard
+            // against path-local state and compare both against the CPU mirror.
+            let preview = render(&dev, &timeline, [255, 255, 255, 255]);
+            let export = render(&dev, &timeline, [255, 255, 255, 255]);
+            assert_eq!(preview.rgba, export.rgba);
+
+            for y in 0..RS.height {
+                for x in 0..RS.width {
+                    let expected = (mask.coverage(
+                        (x as f64 + 0.5) / RS.width as f64,
+                        (y as f64 + 0.5) / RS.height as f64,
+                    ) * 255.0)
+                        .round() as i32;
+                    let actual = pixel_at(&preview, x, y)[0] as i32;
+                    assert!(
+                        (actual - expected).abs() <= 3,
+                        "shape={shape:?} feather={feather} pixel=({x},{y}) expected={expected} actual={actual}"
+                    );
+                }
+            }
+        }
+    }
+
+    // Multiple masks intersect in authored order. Compare the real GPU result
+    // against the product of both CPU coverage functions at every pixel.
+    let masks = vec![
+        Mask {
+            shape: MaskShape::Circle {
+                center: Point2::new(0.38, 0.5),
+                radius: Point2::new(0.34, 0.3),
+            },
+            feather: 0.08,
+            ..Mask::default()
+        },
+        Mask {
+            shape: MaskShape::Circle {
+                center: Point2::new(0.62, 0.5),
+                radius: Point2::new(0.34, 0.3),
+            },
+            feather: 0.08,
+            ..Mask::default()
+        },
+    ];
+    let mut timeline = full_canvas_timeline();
+    timeline.tracks[0].clips[0].masks = masks.clone();
+    let preview = render(&dev, &timeline, [255, 255, 255, 255]);
+    let export = render(&dev, &timeline, [255, 255, 255, 255]);
+    assert_eq!(preview.rgba, export.rgba);
+    for y in 0..RS.height {
+        for x in 0..RS.width {
+            let px = (x as f64 + 0.5) / RS.width as f64;
+            let py = (y as f64 + 0.5) / RS.height as f64;
+            let expected = (masks
+                .iter()
+                .map(|mask| mask.coverage(px, py))
+                .product::<f64>()
+                * 255.0)
+                .round() as i32;
+            let actual = pixel_at(&preview, x, y)[0] as i32;
+            assert!(
+                (actual - expected).abs() <= 3,
+                "multiple masks pixel=({x},{y}) expected={expected} actual={actual}"
+            );
+        }
+    }
+}
diff --git a/crates/opentake-render/tests/gpu_text.rs b/crates/opentake-render/tests/gpu_text.rs
index ce367318..3b0b811e 100644
--- a/crates/opentake-render/tests/gpu_text.rs
+++ b/crates/opentake-render/tests/gpu_text.rs
@@ -192,6 +192,33 @@ fn y_span(frame: &DecodedFrame) -> u32 {
     }
 }
 
+fn alpha_bounds(frame: &DecodedFrame) -> Option<(u32, u32, u32, u32)> {
+    let mut x0 = frame.width;
+    let mut y0 = frame.height;
+    let mut x1 = 0;
+    let mut y1 = 0;
+    let mut found = false;
+    for y in 0..frame.height {
+        for x in 0..frame.width {
+            if frame.rgba[((y * frame.width + x) * 4 + 3) as usize] > 0 {
+                found = true;
+                x0 = x0.min(x);
+                y0 = y0.min(y);
+                x1 = x1.max(x);
+                y1 = y1.max(y);
+            }
+        }
+    }
+    found.then_some((x0, y0, x1, y1))
+}
+
+fn left_alpha_run(frame: &DecodedFrame) -> u32 {
+    let y = frame.height / 2;
+    (0..frame.width)
+        .take_while(|&x| frame.rgba[((y * frame.width + x) * 4 + 3) as usize] > 0)
+        .count() as u32
+}
+
 #[test]
 fn font_size_scales_with_canvas_height() {
     let r = CosmicTextRasterizer::new();
@@ -377,3 +404,123 @@ fn natural_size_shadow_padding_matches_upstream() {
     assert_eq!(TextLayout::SHADOW_PADDING, 12.0);
     assert_eq!(TextLayout::REFERENCE_CANVAS_HEIGHT, 1080.0);
 }
+
+#[test]
+fn fallback_font_no_font_scaled_stroke_and_structural_golden_matrix() {
+    // Pinned structural values from the upstream CATextLayer/TextLayout path.
+    // Glyph edge antialiasing is renderer-specific, so the golden compares
+    // geometry and ordering rather than exact CoreText coverage bytes.
+    const UPSTREAM_REFERENCE_HEIGHT: f64 = 1080.0;
+    const UPSTREAM_BORDER_AT_REFERENCE: u32 = 2;
+    const UPSTREAM_SHADOW_PADDING_EACH_SIDE: f64 = 12.0;
+
+    assert_eq!(
+        TextLayout::REFERENCE_CANVAS_HEIGHT,
+        UPSTREAM_REFERENCE_HEIGHT
+    );
+    assert_eq!(
+        TextLayout::SHADOW_PADDING,
+        UPSTREAM_SHADOW_PADDING_EACH_SIDE
+    );
+
+    // A truly empty font database models headless CI. The request still
+    // returns a correctly sized transparent premultiplied frame and never
+    // panics or invents replacement glyphs.
+    let headless = CosmicTextRasterizer::without_system_fonts();
+    assert!(!headless.has_fonts());
+    let mut plain = TextStyle {
+        font_size: 96.0,
+        ..TextStyle::default()
+    };
+    plain.shadow.enabled = false;
+    let no_font = headless
+        .rasterize(&TextRasterRequest {
+            clip_id: "headless",
+            content: "终验 Headless",
+            style: &plain,
+            box_norm: (0.0, 0.0, 1.0, 1.0),
+            canvas: (640, 360),
+        })
+        .expect("headless frame");
+    assert_eq!((no_font.width, no_font.height), (640, 360));
+    assert!(no_font.premultiplied);
+    assert!(alpha_bounds(&no_font).is_none());
+
+    let rasterizer = CosmicTextRasterizer::new();
+    if !rasterizer.has_fonts() {
+        eprintln!("[skip] no system fonts for structural golden matrix");
+        return;
+    }
+
+    // A missing requested family must fall back through cosmic-text/fontdb.
+    let mut fallback = plain.clone();
+    fallback.font_name = "OpenTake-Definitely-Missing-Bold".into();
+    fallback.alignment = TextAlignment::Center;
+    let mixed = rasterizer
+        .rasterize(&TextRasterRequest {
+            clip_id: "fallback",
+            content: "终验 FINAL CHECK",
+            style: &fallback,
+            box_norm: (0.0, 0.0, 1.0, 1.0),
+            canvas: (960, 270),
+        })
+        .expect("fallback frame");
+    let mixed_bounds = alpha_bounds(&mixed).expect("fallback must paint glyphs");
+    assert!(mixed_bounds.0 < mixed.width / 2);
+    assert!(mixed_bounds.2 > mixed.width / 2);
+
+    // Pinned left/center/right structural matrix for the same Latin/CJK run.
+    let centroid = |alignment| {
+        let mut style = fallback.clone();
+        style.alignment = alignment;
+        let frame = rasterizer
+            .rasterize(&TextRasterRequest {
+                clip_id: "alignment",
+                content: "OpenTake 终验",
+                style: &style,
+                box_norm: (0.0, 0.0, 1.0, 1.0),
+                canvas: (960, 270),
+            })
+            .expect("alignment frame");
+        x_centroid(&frame) / frame.width as f64
+    };
+    let left = centroid(TextAlignment::Left);
+    let center = centroid(TextAlignment::Center);
+    let right = centroid(TextAlignment::Right);
+    assert!(left < 0.35, "left centroid {left}");
+    assert!((0.4..0.6).contains(&center), "center centroid {center}");
+    assert!(right > 0.65, "right centroid {right}");
+    assert!(left < center && center < right);
+
+    // A narrow box must wrap the mixed-language fixture into more vertical
+    // structure than a short line.
+    let render = |content: &str| {
+        rasterizer
+            .rasterize(&TextRasterRequest {
+                clip_id: "wrap",
+                content,
+                style: &fallback,
+                box_norm: (0.0, 0.0, 0.34, 1.0),
+                canvas: (960, 540),
+            })
+            .expect("wrap frame")
+    };
+    assert!(y_span(&render("OpenTake 终验 wraps across multiple lines")) > y_span(&render("终验")));
+
+    // The upstream box-border stroke is 2 px at 1080p and scales with canvas
+    // height, with a one-pixel floor for small canvases.
+    let mut border = plain;
+    border.border.enabled = true;
+    for (height, expected) in [(540, 1), (1080, UPSTREAM_BORDER_AT_REFERENCE), (2160, 4)] {
+        let frame = rasterizer
+            .rasterize(&TextRasterRequest {
+                clip_id: "border",
+                content: "I",
+                style: &border,
+                box_norm: (0.0, 0.0, 1.0, 1.0),
+                canvas: (height, height),
+            })
+            .expect("border frame");
+        assert_eq!(left_alpha_run(&frame), expected, "canvas height {height}");
+    }
+}
diff --git a/crates/opentake-render/tests/gpu_y_orientation.rs b/crates/opentake-render/tests/gpu_y_orientation.rs
index f45e2933..cb334686 100644
--- a/crates/opentake-render/tests/gpu_y_orientation.rs
+++ b/crates/opentake-render/tests/gpu_y_orientation.rs
@@ -243,6 +243,7 @@ fn off_center_mask_clips_to_authored_screen_region_not_mirrored() {
         },
         feather: 0.0,
         invert: false,
+        ..Mask::default()
     }];
     let mut track = Track::new("t0", ClipType::Video);
     track.clips.push(clip);
diff --git a/crates/opentake-render/tests/lut.rs b/crates/opentake-render/tests/lut.rs
new file mode 100644
index 00000000..6190a3bf
--- /dev/null
+++ b/crates/opentake-render/tests/lut.rs
@@ -0,0 +1,165 @@
+//! Real GPU acceptance for project-managed 3D `.cube` LUTs.
+
+use std::rc::Rc;
+
+use opentake_domain::{Clip, ClipType, CubeLut, LutReference, Point, Timeline, Track, Transform};
+use opentake_render::gpu::texture::{upload_lut_3d, upload_rgba};
+use opentake_render::source::DecodedFrame;
+use opentake_render::wgpu;
+use opentake_render::{
+    build_render_plan, Compositor, GpuLutTexture, GpuTexture, RenderDevice, RenderError,
+    RenderSize, SourceMetrics, TextureResolver, TextureSource,
+};
+
+const RS: RenderSize = RenderSize {
+    width: 16,
+    height: 16,
+};
+
+struct Metrics;
+impl SourceMetrics for Metrics {
+    fn natural_size(&self, _media_ref: &str) -> Option<(u32, u32)> {
+        Some((16, 16))
+    }
+}
+
+struct LutResolver<'d> {
+    device: &'d wgpu::Device,
+    queue: &'d wgpu::Queue,
+    source: Option<Rc<GpuTexture>>,
+    lut: CubeLut,
+    uploaded_lut: Option<Rc<GpuLutTexture>>,
+}
+
+impl TextureResolver for LutResolver<'_> {
+    fn resolve(&mut self, _source: &TextureSource, _frame: i64) -> Option<Rc<GpuTexture>> {
+        if self.source.is_none() {
+            let frame = DecodedFrame::new(16, 16, [64, 128, 192, 255].repeat(16 * 16), true);
+            self.source = Some(Rc::new(upload_rgba(
+                self.device,
+                self.queue,
+                &frame,
+                false,
+                Some("lut-source"),
+            )));
+        }
+        self.source.clone()
+    }
+
+    fn resolve_lut(
+        &mut self,
+        _reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, RenderError> {
+        if self.uploaded_lut.is_none() {
+            self.uploaded_lut = Some(Rc::new(upload_lut_3d(
+                self.device,
+                self.queue,
+                &self.lut,
+                Some("known-transform-lut"),
+            )));
+        }
+        Ok(self.uploaded_lut.clone())
+    }
+}
+
+fn cube(size: usize, transform: impl Fn(f32, f32, f32) -> [f32; 3]) -> Vec<u8> {
+    let mut text =
+        format!("TITLE \"acceptance\"\nLUT_3D_SIZE {size}\nDOMAIN_MIN 0 0 0\nDOMAIN_MAX 1 1 1\n");
+    let last = (size - 1) as f32;
+    for b in 0..size {
+        for g in 0..size {
+            for r in 0..size {
+                let [r, g, b] = transform(r as f32 / last, g as f32 / last, b as f32 / last);
+                text.push_str(&format!("{r:.7} {g:.7} {b:.7}\n"));
+            }
+        }
+    }
+    text.into_bytes()
+}
+
+fn timeline(reference: LutReference) -> Timeline {
+    let mut timeline = Timeline::new();
+    timeline.width = 16;
+    timeline.height = 16;
+    timeline.fps = 30;
+    let mut clip = Clip::new("clip", "asset", 0, 30);
+    clip.transform = Transform::from_top_left(Point { x: 0.0, y: 0.0 }, 1.0, 1.0);
+    clip.lut = Some(reference);
+    let mut track = Track::new("track", ClipType::Video);
+    track.clips.push(clip);
+    timeline.tracks.push(track);
+    timeline
+}
+
+fn render(dev: &RenderDevice, timeline: &Timeline, lut: CubeLut) -> DecodedFrame {
+    let plan = build_render_plan(timeline, RS, &Metrics);
+    let frame = plan.frame(timeline, 0);
+    let compositor = Compositor::new(&dev.device);
+    let mut resolver = LutResolver {
+        device: &dev.device,
+        queue: &dev.queue,
+        source: None,
+        lut,
+        uploaded_lut: None,
+    };
+    compositor
+        .render_to_rgba(&dev.device, &dev.queue, RS, &frame, &mut resolver)
+        .expect("render with a valid LUT")
+}
+
+#[test]
+fn malformed_and_oversized_luts_fail_closed_and_valid_lut_matches_preview_export() {
+    let malformed = b"LUT_3D_SIZE 17\n0 0 0\n";
+    assert!(CubeLut::parse(malformed).is_err(), "short table must fail");
+    assert!(
+        CubeLut::parse(&vec![b' '; CubeLut::MAX_BYTES + 1]).is_err(),
+        "oversized input must fail before parsing"
+    );
+    assert!(
+        CubeLut::parse(&cube(16, |r, g, b| [r, g, b])).is_err(),
+        "only planned 17- and 33-point tables are accepted"
+    );
+
+    let identity = CubeLut::parse(&cube(17, |r, g, b| [r, g, b])).expect("17-point identity");
+    let transform =
+        CubeLut::parse(&cube(33, |r, g, b| [b, g * 0.5, r])).expect("33-point transform");
+    assert_eq!(identity.size(), 17);
+    assert_eq!(transform.size(), 33);
+
+    let reference = LutReference::new(
+        "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
+        "Known Transform",
+        0.75,
+    )
+    .expect("managed reference");
+    assert_eq!(
+        reference.relative_path(),
+        "media/luts/0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef.cube"
+    );
+
+    let authored = timeline(reference.clone());
+    let json = serde_json::to_vec(&authored).expect("save project timeline");
+    let reopened: Timeline = serde_json::from_slice(&json).expect("reopen project timeline");
+    assert_eq!(reopened.tracks[0].clips[0].lut.as_ref(), Some(&reference));
+
+    let Ok(dev) = RenderDevice::try_new() else {
+        eprintln!("[skip] LUT GPU acceptance: no GPU device");
+        return;
+    };
+    let preview = render(&dev, &reopened, transform.clone());
+    let export = render(&dev, &reopened, transform);
+    assert_eq!(preview.rgba, export.rgba, "preview/export LUT drift");
+
+    let center = (8 * 16 + 8) * 4;
+    let pixel = &preview.rgba[center..center + 4];
+    assert!(pixel[0] > 140, "blue-to-red transform missing: {pixel:?}");
+    assert!(pixel[1] < 100, "green attenuation missing: {pixel:?}");
+    assert!(pixel[2] < 100, "red-to-blue transform missing: {pixel:?}");
+
+    let identity_timeline = timeline(LutReference::new(reference.id, "Identity", 1.0).unwrap());
+    let identity_frame = render(&dev, &identity_timeline, identity);
+    let identity_pixel = &identity_frame.rgba[center..center + 4];
+    for (actual, expected) in identity_pixel.iter().zip([64_u8, 128, 192, 255]) {
+        assert!((i16::from(*actual) - i16::from(expected)).abs() <= 2);
+    }
+}
diff --git a/crates/opentake-render/tests/nested_timeline.rs b/crates/opentake-render/tests/nested_timeline.rs
new file mode 100644
index 00000000..6306c35c
--- /dev/null
+++ b/crates/opentake-render/tests/nested_timeline.rs
@@ -0,0 +1,92 @@
+use opentake_domain::{Clip, ClipType, NestedSequence, Timeline, Track};
+use opentake_render::{build_render_plan, RenderSize, SourceMetrics};
+
+struct Metrics;
+
+impl SourceMetrics for Metrics {
+    fn natural_size(&self, _media_ref: &str) -> Option<(u32, u32)> {
+        Some((64, 64))
+    }
+}
+
+fn video_clip(id: &str, media_ref: &str, start: i32, duration: i32) -> Clip {
+    let mut clip = Clip::new(id, media_ref, start, duration);
+    clip.media_type = ClipType::Video;
+    clip.source_clip_type = ClipType::Video;
+    clip
+}
+
+fn sequence_clip(id: &str, sequence_id: &str, start: i32, duration: i32) -> Clip {
+    Clip::new_nested(id, sequence_id, start, duration)
+}
+
+#[test]
+fn nested_edits_preview_and_export_same_frames() {
+    let mut child_timeline = Timeline::new();
+    child_timeline.settings_configured = true;
+    let mut child_track = Track::new("child-v1", ClipType::Video);
+    child_track
+        .clips
+        .push(video_clip("child-clip", "child-source-a", 2, 8));
+    child_timeline.tracks.push(child_track);
+
+    let mut root = Timeline::new();
+    root.settings_configured = true;
+    root.nested_sequences
+        .push(NestedSequence::new("sequence-a", "Scene A", child_timeline));
+    let mut root_track = Track::new("root-v1", ClipType::Video);
+    root_track
+        .clips
+        .push(sequence_clip("compound", "sequence-a", 10, 20));
+    root.tracks.push(root_track);
+
+    root.validate_nested_sequences()
+        .expect("valid nested graph");
+    let encoded = serde_json::to_vec(&root).expect("serialize nested project");
+    let mut reopened: Timeline = serde_json::from_slice(&encoded).expect("reopen nested project");
+    assert_eq!(reopened.nested_sequences[0].name, "Scene A");
+
+    let preview_plan = build_render_plan(&reopened, RenderSize::new(64, 64), &Metrics);
+    let preview = preview_plan.frame(&reopened, 12);
+    assert_eq!(preview.draws.len(), 1);
+    assert_eq!(preview.draws[0].clip_id, "child-clip");
+    assert_eq!(preview.draws[0].source_frame, 0);
+
+    reopened.nested_sequences[0].timeline.tracks[0].clips[0].media_ref =
+        "child-source-b".to_string();
+    reopened.nested_sequences[0].timeline.tracks[0].clips[0].trim_start_frame = 3;
+
+    let preview_after_edit = build_render_plan(&reopened, RenderSize::new(64, 64), &Metrics);
+    let export_after_edit = build_render_plan(&reopened, RenderSize::new(64, 64), &Metrics);
+    for frame in 12..20 {
+        assert_eq!(
+            preview_after_edit.frame(&reopened, frame),
+            export_after_edit.frame(&reopened, frame),
+            "preview/export diverged at frame {frame}",
+        );
+    }
+    assert_eq!(
+        preview_after_edit.frame(&reopened, 12).draws[0].source_frame,
+        3
+    );
+
+    let mut cycle = Timeline::new();
+    let mut a = Timeline::new();
+    let mut a_track = Track::new("a-track", ClipType::Video);
+    a_track.clips.push(sequence_clip("a-to-b", "b", 0, 10));
+    a.tracks.push(a_track);
+    let mut b = Timeline::new();
+    let mut b_track = Track::new("b-track", ClipType::Video);
+    b_track.clips.push(sequence_clip("b-to-a", "a", 0, 10));
+    b.tracks.push(b_track);
+    cycle
+        .nested_sequences
+        .push(NestedSequence::new("a", "A", a));
+    cycle
+        .nested_sequences
+        .push(NestedSequence::new("b", "B", b));
+    let error = cycle
+        .validate_nested_sequences()
+        .expect_err("cycle must be rejected");
+    assert!(error.contains("a -> b -> a"), "unexpected error: {error}");
+}
diff --git a/crates/opentake-render/tests/optical_flow.rs b/crates/opentake-render/tests/optical_flow.rs
new file mode 100644
index 00000000..63a1d0da
--- /dev/null
+++ b/crates/opentake-render/tests/optical_flow.rs
@@ -0,0 +1,189 @@
+use std::rc::Rc;
+
+use opentake_media::{
+    convert_frame_rate, interpolate_frame_pair, FrameInterpolationFallback, FrameInterpolationMode,
+    RgbaFrame,
+};
+use opentake_render::gpu::compositor::{
+    TextureInterpolationConfig, TextureInterpolationFallback, TextureInterpolationMode,
+    TextureResolveRequest,
+};
+use opentake_render::{GpuTexture, TextureResolver, TextureSource};
+
+fn moving_square(x: u32) -> RgbaFrame {
+    let mut frame = RgbaFrame::black(8, 4);
+    for y in 1..=2 {
+        for px_x in x..x + 2 {
+            let offset = ((y * frame.width + px_x) * 4) as usize;
+            frame.rgba[offset..offset + 4].copy_from_slice(&[255, 255, 255, 255]);
+        }
+    }
+    frame
+}
+
+fn opposing_squares(left_x: u32, right_x: u32) -> RgbaFrame {
+    let mut frame = RgbaFrame::black(64, 32);
+    for y in 12..20 {
+        for x in left_x..left_x + 8 {
+            let offset = ((y * frame.width + x) * 4) as usize;
+            frame.rgba[offset..offset + 4].copy_from_slice(&[255, 255, 255, 255]);
+        }
+        for x in right_x..right_x + 8 {
+            let offset = ((y * frame.width + x) * 4) as usize;
+            frame.rgba[offset..offset + 4].copy_from_slice(&[255, 255, 255, 255]);
+        }
+    }
+    frame
+}
+
+fn is_lit(frame: &RgbaFrame, x: u32, y: u32) -> bool {
+    frame.rgba[((y * frame.width + x) * 4) as usize] > 200
+}
+
+fn light_centroid_x(frame: &RgbaFrame) -> f64 {
+    let mut weighted_x = 0.0;
+    let mut weight = 0.0;
+    for y in 0..frame.height {
+        for x in 0..frame.width {
+            let offset = ((y * frame.width + x) * 4) as usize;
+            let value = frame.rgba[offset] as f64;
+            weighted_x += x as f64 * value;
+            weight += value;
+        }
+    }
+    weighted_x / weight
+}
+
+#[derive(Default)]
+struct RecordingResolver {
+    requests: Vec<TextureInterpolationConfig>,
+}
+
+impl TextureResolver for RecordingResolver {
+    fn resolve(&mut self, _source: &TextureSource, _source_frame: i64) -> Option<Rc<GpuTexture>> {
+        None
+    }
+
+    fn resolve_with_interpolation(
+        &mut self,
+        request: TextureResolveRequest<'_>,
+    ) -> Option<Rc<GpuTexture>> {
+        self.requests.push(request.interpolation);
+        None
+    }
+}
+
+#[test]
+fn two_frame_fixture_is_deterministic_and_matches_preview_export() {
+    let first = moving_square(1);
+    let last = moving_square(5);
+    let conversion = convert_frame_rate(2, 24.0, 60.0).expect("valid 24 to 60 conversion");
+
+    assert_eq!(conversion.len(), 4);
+    assert_eq!(conversion.first().unwrap().timestamp_secs, 0.0);
+    assert_eq!(conversion.last().unwrap().timestamp_secs, 1.0 / 24.0);
+    assert_eq!(conversion[1].source_frame, 0);
+    assert_eq!(conversion[1].next_source_frame, 1);
+    assert!((conversion[1].source_alpha - 0.4).abs() < 1e-12);
+    assert!((conversion[2].source_alpha - 0.8).abs() < 1e-12);
+
+    let render = |optical_flow_available| {
+        let source = [&first, &last];
+        conversion
+            .iter()
+            .map(|sample| {
+                interpolate_frame_pair(
+                    source[sample.source_frame as usize],
+                    source[sample.next_source_frame as usize],
+                    sample.source_alpha,
+                    FrameInterpolationMode::OpticalFlow,
+                    FrameInterpolationFallback::Blend,
+                    optical_flow_available,
+                )
+                .expect("configured blend fallback is infallible")
+            })
+            .collect::<Vec<_>>()
+    };
+    let preview = render(true);
+    let export = render(true);
+
+    assert_eq!(preview, export);
+    assert_eq!(preview.first().unwrap().frame, first);
+    assert_eq!(preview.last().unwrap().frame, last);
+    let centroids = preview
+        .iter()
+        .map(|result| light_centroid_x(&result.frame))
+        .collect::<Vec<_>>();
+    assert!(centroids.windows(2).all(|pair| pair[0] < pair[1]));
+    assert!(preview
+        .iter()
+        .all(|result| result.mode_used == FrameInterpolationMode::OpticalFlow));
+
+    let fallback = render(false);
+    assert!(fallback
+        .iter()
+        .all(|result| result.mode_used == FrameInterpolationMode::Blend));
+    assert_ne!(fallback[1].frame, preview[1].frame);
+    assert!(interpolate_frame_pair(
+        &first,
+        &last,
+        0.5,
+        FrameInterpolationMode::OpticalFlow,
+        FrameInterpolationFallback::Error,
+        false,
+    )
+    .is_err());
+
+    let interpolation = TextureInterpolationConfig::new(
+        24.0,
+        60.0,
+        TextureInterpolationMode::OpticalFlow,
+        TextureInterpolationFallback::Blend,
+    )
+    .expect("valid render interpolation config");
+    assert!(TextureInterpolationConfig::new(
+        0.0,
+        60.0,
+        TextureInterpolationMode::OpticalFlow,
+        TextureInterpolationFallback::Blend,
+    )
+    .is_err());
+    let source = TextureSource::Decoded {
+        media_ref: "motion-24fps".to_string(),
+    };
+    let mut preview_resolver = RecordingResolver::default();
+    let mut export_resolver = RecordingResolver::default();
+    let request = TextureResolveRequest {
+        source: &source,
+        source_frame: 1,
+        interpolation,
+    };
+    preview_resolver.resolve_with_interpolation(request);
+    export_resolver.resolve_with_interpolation(request);
+
+    assert_eq!(preview_resolver.requests, export_resolver.requests);
+    assert_eq!(preview_resolver.requests, vec![interpolation]);
+}
+
+#[test]
+fn optical_flow_tracks_opposing_local_motion_without_global_frame_shift() {
+    let first = opposing_squares(4, 52);
+    let last = opposing_squares(12, 44);
+    let result = interpolate_frame_pair(
+        &first,
+        &last,
+        0.5,
+        FrameInterpolationMode::OpticalFlow,
+        FrameInterpolationFallback::Error,
+        true,
+    )
+    .expect("local optical flow should be available");
+
+    // Both objects move toward the center. A single global translation cannot
+    // satisfy these two regions simultaneously; the local field places both at
+    // their respective half-way locations.
+    assert!(is_lit(&result.frame, 10, 15));
+    assert!(is_lit(&result.frame, 50, 15));
+    assert!(!is_lit(&result.frame, 4, 15));
+    assert!(!is_lit(&result.frame, 59, 15));
+}
diff --git a/crates/opentake-render/tests/stabilization.rs b/crates/opentake-render/tests/stabilization.rs
new file mode 100644
index 00000000..60171f68
--- /dev/null
+++ b/crates/opentake-render/tests/stabilization.rs
@@ -0,0 +1,149 @@
+use opentake_domain::{Clip, ClipType, Timeline, Track};
+use opentake_media::analysis::{
+    analyze_stabilization, StabilizationConfig, StabilizationMotionSample,
+};
+use opentake_media::MediaCancelToken;
+use opentake_ops::{apply, EditCommand, EditorState, SeqIdGen};
+use opentake_render::{build_render_plan, RenderSize, SourceMetrics};
+
+struct FullHdSource;
+
+impl SourceMetrics for FullHdSource {
+    fn natural_size(&self, _media_ref: &str) -> Option<(u32, u32)> {
+        Some((1920, 1080))
+    }
+}
+
+fn displacement(path: &[(f64, f64)]) -> f64 {
+    path.windows(2)
+        .map(|pair| (pair[1].0 - pair[0].0).hypot(pair[1].1 - pair[0].1))
+        .sum()
+}
+
+#[test]
+fn synthetic_shake_produces_editable_undoable_preview_export_solution() {
+    let observed = [
+        (0.000, 0.000),
+        (0.040, -0.018),
+        (-0.032, 0.022),
+        (0.047, -0.026),
+        (-0.038, 0.019),
+        (0.034, -0.015),
+        (0.000, 0.000),
+    ];
+    let samples = observed
+        .iter()
+        .enumerate()
+        .map(|(frame, &(x, y))| StabilizationMotionSample {
+            frame: frame as i32,
+            translation_x: x,
+            translation_y: y,
+            rotation_degrees: 0.0,
+        })
+        .collect::<Vec<_>>();
+    let cancel = MediaCancelToken::new();
+    let solution = analyze_stabilization(
+        &samples,
+        "asset-shake",
+        StabilizationConfig::default(),
+        &cancel,
+    )
+    .expect("synthetic stabilization analysis");
+
+    assert_eq!(solution.model, "opentake.motion-smoothing");
+    assert_eq!(solution.model_version, 1);
+    assert_eq!(solution.source_identity, "asset-shake");
+    let stabilized = samples
+        .iter()
+        .map(|sample| {
+            let correction = solution.sample(sample.frame);
+            (
+                sample.translation_x + correction.translation_x,
+                sample.translation_y + correction.translation_y,
+            )
+        })
+        .collect::<Vec<_>>();
+    assert!(displacement(&stabilized) < displacement(&observed));
+    assert!(solution.guarantees_coverage(16.0 / 9.0));
+
+    let mut timeline = Timeline::new();
+    let mut track = Track::new("video-track", ClipType::Video);
+    track.clips.push(Clip::new(
+        "clip-shake",
+        "asset-shake",
+        0,
+        samples.len() as i32,
+    ));
+    timeline.tracks.push(track);
+    let mut state = EditorState::from_timeline(timeline);
+    let ids = SeqIdGen::new("stabilization");
+
+    apply(
+        &mut state,
+        EditCommand::ApplyStabilization {
+            clip_id: "clip-shake".into(),
+            solution: solution.clone(),
+        },
+        &ids,
+    )
+    .expect("apply stabilization");
+    assert_eq!(state.timeline.tracks[0].clips[0].media_ref, "asset-shake");
+    assert_eq!(state.undo_depth(), 1);
+
+    apply(
+        &mut state,
+        EditCommand::AdjustStabilization {
+            clip_id: "clip-shake".into(),
+            strength: Some(0.65),
+            crop_margin: Some(0.03),
+        },
+        &ids,
+    )
+    .expect("adjust stabilization");
+    let edited = state.timeline.tracks[0].clips[0]
+        .stabilization
+        .as_ref()
+        .expect("persisted editable stabilization track");
+    assert_eq!(edited.strength, 0.65);
+    assert_eq!(edited.crop_margin, 0.03);
+
+    let preview = build_render_plan(&state.timeline, RenderSize::new(1920, 1080), &FullHdSource);
+    let export = build_render_plan(&state.timeline, RenderSize::new(1920, 1080), &FullHdSource);
+    for frame in 0..samples.len() as i32 {
+        let preview_draw = &preview.frame(&state.timeline, frame).draws[0];
+        let export_draw = &export.frame(&state.timeline, frame).draws[0];
+        assert_eq!(preview_draw.affine, export_draw.affine);
+        assert_eq!(preview_draw.crop_uv, export_draw.crop_uv);
+    }
+
+    apply(&mut state, EditCommand::Undo, &ids).expect("undo adjustment");
+    assert_eq!(
+        state.timeline.tracks[0].clips[0]
+            .stabilization
+            .as_ref()
+            .expect("analysis remains after undo")
+            .strength,
+        1.0
+    );
+    apply(
+        &mut state,
+        EditCommand::ResetStabilization {
+            clip_id: "clip-shake".into(),
+        },
+        &ids,
+    )
+    .expect("reset stabilization");
+    assert!(state.timeline.tracks[0].clips[0].stabilization.is_none());
+    apply(&mut state, EditCommand::Undo, &ids).expect("undo reset");
+    assert!(state.timeline.tracks[0].clips[0].stabilization.is_some());
+
+    let cancelled = MediaCancelToken::new();
+    cancelled.cancel();
+    assert!(analyze_stabilization(
+        &samples,
+        "asset-shake",
+        StabilizationConfig::default(),
+        &cancelled,
+    )
+    .is_err());
+}
diff --git a/crates/opentake-render/tests/transitions.rs b/crates/opentake-render/tests/transitions.rs
new file mode 100644
index 00000000..51f59b2f
--- /dev/null
+++ b/crates/opentake-render/tests/transitions.rs
@@ -0,0 +1,237 @@
+//! Owning acceptance test for the first advertised editable transition.
+
+use std::collections::HashMap;
+use std::rc::Rc;
+
+use opentake_domain::{Clip, ClipType, Timeline, Track, Transform, TransitionKind};
+use opentake_ops::{apply, EditCommand, EditorState, SeqIdGen};
+use opentake_render::gpu::texture::upload_rgba;
+use opentake_render::source::DecodedFrame;
+use opentake_render::wgpu;
+use opentake_render::{
+    build_render_plan, Compositor, GpuTexture, RenderDevice, RenderSize, SourceMetrics,
+    TextureResolver, TextureSource,
+};
+
+const SIZE: RenderSize = RenderSize {
+    width: 16,
+    height: 16,
+};
+
+struct Metrics;
+
+impl SourceMetrics for Metrics {
+    fn natural_size(&self, _media_ref: &str) -> Option<(u32, u32)> {
+        Some((16, 16))
+    }
+}
+
+struct PairResolver<'d> {
+    device: &'d wgpu::Device,
+    queue: &'d wgpu::Queue,
+    cache: HashMap<String, Rc<GpuTexture>>,
+}
+
+impl TextureResolver for PairResolver<'_> {
+    fn resolve(&mut self, source: &TextureSource, _frame: i64) -> Option<Rc<GpuTexture>> {
+        let media_ref = match source {
+            TextureSource::Decoded { media_ref }
+            | TextureSource::Image { media_ref }
+            | TextureSource::Lottie { media_ref } => media_ref,
+            TextureSource::Text { .. } => return None,
+        };
+        if let Some(texture) = self.cache.get(media_ref) {
+            return Some(texture.clone());
+        }
+        let color = match media_ref.as_str() {
+            "red" => [255, 0, 0, 255],
+            "blue" => [0, 0, 255, 255],
+            other => panic!("unexpected transition source {other}"),
+        };
+        let mut rgba = vec![0; 16 * 16 * 4];
+        for pixel in rgba.chunks_exact_mut(4) {
+            pixel.copy_from_slice(&color);
+        }
+        let frame = DecodedFrame::new(16, 16, rgba, true);
+        let texture = Rc::new(upload_rgba(
+            self.device,
+            self.queue,
+            &frame,
+            false,
+            Some("transition fixture"),
+        ));
+        self.cache.insert(media_ref.clone(), texture.clone());
+        Some(texture)
+    }
+}
+
+fn transition_timeline() -> Timeline {
+    let mut timeline = Timeline::new();
+    timeline.fps = 30;
+    timeline.width = 16;
+    timeline.height = 16;
+    let mut outgoing = Clip::new("a", "red", 0, 12);
+    outgoing.transform = Transform::default();
+    let mut incoming = Clip::new("b", "blue", 12, 12);
+    incoming.transform = Transform::default();
+    let mut track = Track::new("v", ClipType::Video);
+    track.clips = vec![outgoing, incoming];
+    timeline.tracks.push(track);
+    timeline
+}
+
+fn render_frame(device: &RenderDevice, timeline: &Timeline, frame: i32) -> DecodedFrame {
+    let plan = build_render_plan(timeline, SIZE, &Metrics);
+    let frame_plan = plan.frame(timeline, frame);
+    let compositor = Compositor::new(&device.device);
+    let mut resolver = PairResolver {
+        device: &device.device,
+        queue: &device.queue,
+        cache: HashMap::new(),
+    };
+    compositor
+        .render_to_rgba(
+            &device.device,
+            &device.queue,
+            SIZE,
+            &frame_plan,
+            &mut resolver,
+        )
+        .expect("render transition frame")
+}
+
+fn center_pixel(frame: &DecodedFrame) -> [u8; 4] {
+    let index = ((frame.height / 2 * frame.width + frame.width / 2) * 4) as usize;
+    frame.rgba[index..index + 4].try_into().unwrap()
+}
+
+fn assert_pixel_near(actual: [u8; 4], expected: [u8; 4]) {
+    for channel in 0..4 {
+        assert!(
+            (actual[channel] as i16 - expected[channel] as i16).abs() <= 3,
+            "expected {expected:?}, got {actual:?}"
+        );
+    }
+}
+
+#[test]
+fn adjacent_clip_transition_is_editable_undoable_and_matches_preview_export() {
+    let ids = SeqIdGen::default();
+    let mut state = EditorState::from_timeline(transition_timeline());
+    apply(
+        &mut state,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 4,
+        },
+        &ids,
+    )
+    .expect("add advertised transition");
+
+    let transition = state.timeline.tracks[0].clips[0]
+        .transition_out
+        .as_ref()
+        .expect("transition persisted on outgoing clip");
+    assert_eq!(transition.to_clip_id, "b");
+    assert_eq!(transition.kind, TransitionKind::CrossDissolve);
+    assert_eq!(transition.duration_frames, 4);
+
+    // Pair identity must be explicit in the saved object, not inferred solely
+    // from whichever clip happens to contain it after reopening.
+    let saved = serde_json::to_string(&state.timeline).expect("save timeline JSON");
+    assert!(saved.contains(r#""fromClipId":"a""#));
+    assert!(saved.contains(r#""toClipId":"b""#));
+    let reopened: Timeline = serde_json::from_str(&saved).expect("reopen timeline JSON");
+    assert_eq!(reopened, state.timeline);
+
+    apply(&mut state, EditCommand::Undo, &ids).expect("undo transition");
+    assert!(state.timeline.tracks[0].clips[0].transition_out.is_none());
+    apply(&mut state, EditCommand::Redo, &ids).expect("redo transition");
+    assert_eq!(state.timeline, reopened);
+
+    apply(
+        &mut state,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 3,
+        },
+        &ids,
+    )
+    .expect("change transition duration");
+    assert_eq!(
+        state.timeline.tracks[0].clips[0]
+            .transition_out
+            .as_ref()
+            .unwrap()
+            .duration_frames,
+        3
+    );
+    apply(
+        &mut state,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: None,
+            duration_frames: 3,
+        },
+        &ids,
+    )
+    .expect("remove transition");
+    assert!(state.timeline.tracks[0].clips[0].transition_out.is_none());
+    apply(&mut state, EditCommand::Undo, &ids).expect("undo transition removal");
+    assert_eq!(
+        state.timeline.tracks[0].clips[0]
+            .transition_out
+            .as_ref()
+            .unwrap()
+            .duration_frames,
+        3
+    );
+
+    // A 12-frame pair exposes a six-frame centered transition handle. An
+    // oversized request is an explicit refusal and must not mutate history.
+    let mut invalid = EditorState::from_timeline(transition_timeline());
+    apply(
+        &mut invalid,
+        EditCommand::SetTransition {
+            from_clip_id: "a".into(),
+            to_clip_id: "b".into(),
+            kind: Some(TransitionKind::CrossDissolve),
+            duration_frames: 7,
+        },
+        &ids,
+    )
+    .expect_err("transition longer than either available handle must be rejected");
+    assert_eq!(invalid.version(), 0);
+    assert!(!invalid.can_undo());
+
+    let device = match RenderDevice::try_new() {
+        Ok(device) => device,
+        Err(error) => {
+            eprintln!("[skip] transition pixel fixture: no GPU device ({error})");
+            return;
+        }
+    };
+
+    // Duration four covers frames 8..12. Exercise the first transition frame,
+    // midpoint, last blended frame, and the exact cut/end frame. Preview and
+    // export are represented by fresh compositor/resolver executions.
+    for (frame, golden) in [
+        (8, [255, 0, 0, 255]),
+        (10, [128, 0, 128, 255]),
+        (11, [64, 0, 191, 255]),
+        (12, [0, 0, 255, 255]),
+    ] {
+        let preview = render_frame(&device, &reopened, frame);
+        let export = render_frame(&device, &reopened, frame);
+        assert_eq!(
+            preview.rgba, export.rgba,
+            "preview/export drift at frame {frame}"
+        );
+        assert_pixel_near(center_pixel(&preview), golden);
+    }
+}
diff --git a/docs/architecture/ADVANCED-FEATURES.md b/docs/architecture/ADVANCED-FEATURES.md
index eb4cd7e1..b71dd571 100644
--- a/docs/architecture/ADVANCED-FEATURES.md
+++ b/docs/architecture/ADVANCED-FEATURES.md
@@ -1,5 +1,19 @@
 # OpenTake 进阶能力设计(对标剪映模块 1–5 的差距深化)
 
+> **2026-08-01 Beta 对账附录（覆盖下表“现状”列）**：本文的 `missing` / `partial`
+> 是实现前的历史快照，继续保留作为设计来源，不再表示当前代码状态。首个 Beta 已闭环：
+> 通用特效、交叉溶解、线性光调色、Lift/Gamma/Gain、HSL、3D LUT、绿幕、圆形/线性/
+> 钢笔蒙版、参考色彩匹配、RVM 抠像、防抖、运动追踪、光流补帧、智能擦除、响度、降噪、
+> 声部分离、嵌套时间线、字幕样式同步与 SRT/VTT、口播清理、图文成片、字幕翻译、数字人和
+> 音色克隆。代码与实机证据以
+> `docs/audit/2026-07-14/runtime-artifacts/automated/` 及
+> `docs/releases/1.0.0-beta.1.md` 为准。
+>
+> 后续 Beta 明确保留的扩展是：Bezier/Spring 物理 easing、RGB 多维曲线、wipe/slide/zoom
+> 等通用双源转场、本地神经超分、任意混音的神经语义分轨、高阶曲线变速、多机位自动对齐、
+> 任意 Motion Canvas TSX 与透明 frame sequence。这些是产品路线，不属于
+> `1.0.0-beta.1` 可用性门禁；当前 UI 不把它们伪装成已可用能力。
+
 > 来源:`docs/CAPCUT-GAP.md`(5 个子 Agent 对照剪映模块 1–5 与上游源码的逐特性差距分析)。
 > 范围:**不含**剪映模块 6(自然语言交互/语音助手 —— OpenTake 已有 Agent)与模块 7(云生态/企业协作)。
 > 现状:33 项中 已有 2 / 部分 7 / 缺失 24。上游 Palmier Pro 自述「尚无:特效/转场/调色/蒙版/图形」,源码核对完全坐实。
@@ -76,7 +90,7 @@ OpenTake 补齐这些进阶能力,**几乎不需要新建基础设施**,全部
 | 复合片段嵌套 nested clip | missing | high | p2 | **过渡方案先做**:`saveTimelineRange` 用 FFmpeg/wgpu 重写为「打组烧成内部媒体 + content-hash 缓存」满足「精简图层」;**完整方案后做**:domain 新增 `MediaSource::Nested(child_timeline_id)`,RenderPlan 递归展开或子序列离屏渲染成单层 |
 | 多机位自动对齐 multicam | missing | medium | p2 | 纯本地:各机位音轨 → PCM → rustfft **互相关**求最佳时移 → ops 整体平移到同一时基;多角度切换面板作后续 UI |
 | 字幕样式全局批量同步 | partial(共享样式在,批量算子缺) | low | p1 | 新增「改一处 → 批量回写整 captionGroup」编辑命令 |
-| 导出 .srt 字幕文件 | missing | low | p1 | 从 caption 模型按时码序列化 SubRip;顺带支持 .vtt |
+| 导出 .srt 字幕文件 | **已有** | low | p1 | caption 模型按时码序列化 SubRip/WebVTT；TitleBar 原生保存对话框接 `export_subtitles`，SRT/VTT 均有 Rust 与 UI 路由测试 |
 
 ---
 
@@ -88,8 +102,8 @@ OpenTake 补齐这些进阶能力,**几乎不需要新建基础设施**,全部
 |---|---|---|---|---|
 | 智能剪口播(剔除停顿/语气词) | partial(已规划) | medium | p1 | **本地为主**:词级 `get_transcript` + 静音检测 → Rust 内一次算好 ripple 区间(高阶工具 `remove_filler_words`/`tighten_silences`,避免把帧算术外包给 LLM) |
 | 图文成片 script-to-video | partial(地基在) | high | p1 | agent 编排既有工具:脚本 → `generate_image`→`generate_video`→`generate_audio`(配音)→`add_clips`/`add_texts`/`set_transition`;素材匹配用 SigLIP2 搜索 + import_media 接 stock |
-| 音色克隆 voice cloning | missing | high | p2 | 外部 API(ElevenLabs 等)经 opentake-gen,扩展 audio 生成参数支持自定义音色 |
-| 虚拟数字人 digital avatar | missing | high | p3 | 外部 API(HeyGen/fal 等)经 opentake-gen,新增 catalog kind |
+| 音色克隆 voice cloning | **has** | high | p2 | ElevenLabs IVC 注册/TTS/永久撤销生产桥；参考音频、同意记录、请求哈希和 provider voice id 持久化，生成音频原子导入落轨并可试听/撤销 |
+| 虚拟数字人 digital avatar | **has** | high | p3 | fal Sync Lipsync v3 image-to-video 生产桥；人像+驱动音频、同意与成本确认、结果探测、原子导入落轨和预览/撤销完整接入 |
 | 多语种翻译(字幕) | partial(靠 agent) | medium | p2 | 一等公民:离线 MT 或外部 API + LLM 兜底,翻译后保持时码 |
 
 ---
diff --git a/docs/architecture/ARCHITECTURE.md b/docs/architecture/ARCHITECTURE.md
index af78cb65..a3914380 100644
--- a/docs/architecture/ARCHITECTURE.md
+++ b/docs/architecture/ARCHITECTURE.md
@@ -77,7 +77,7 @@ OpenTake/
 │   ├── opentake-motion/      # 原生 motion fallback:RGBA frame cache / sandbox / StubRenderer / 后续 alpha source
 │   └── opentake-core/        # 组装:EditorState(持有 timeline+manifest)、command 路由、事件总线
 ├── plugins/
-│   └── motion-canvas-studio/ # 待新增:Motion Canvas(MIT) fork/plugin,渲染 mp4 后导入落轨
+│   └── motion-canvas-studio/ # Motion Canvas 3.17.2 MIT wrapper,确定性渲染 mp4 后导入落轨
 ├── src-tauri/                # Tauri 2 app:#[tauri::command] 薄封装 + 窗口/菜单/生命周期
 ├── web/                      # React + TS 前端(Vite)
 ├── services/
@@ -87,7 +87,7 @@ OpenTake/
 
 依赖法则(经上游验证):`domain` 零依赖叶子;`ops` 只依赖 `domain`;`command` 是唯一编辑入口;UI/Agent/MCP 是命令层三个对等客户端。
 
-> Motion / AI Video 主线改为 `plugins/motion-canvas-studio/`:fork Motion Canvas(MIT),渲染 materialized mp4 后由 OpenTake 当普通媒体导入并落轨。`crates/opentake-motion/` 已有 scaffold 保留为后续透明 alpha / PNG sequence / HTML-CSS fallback,不作为 v1 主渲染器 blocker。
+> Motion / AI Video v1 已由 `plugins/motion-canvas-studio/` 落地：锁定 Motion Canvas 3.17.2(MIT)，渲染 materialized mp4 后由 OpenTake 当普通媒体原子导入并落轨。`crates/opentake-motion/` 同时提供离线 Chromium 宿主与 HTML/CSS fallback；透明 alpha / PNG sequence 留给后续版本。
 
 ## 4. 领域模型(可直接复刻,见 MODULE-PORT-MAP.md「Models」)
 
diff --git a/docs/architecture/BUGS.md b/docs/architecture/BUGS.md
index 4dda349b..194184b9 100644
--- a/docs/architecture/BUGS.md
+++ b/docs/architecture/BUGS.md
@@ -17,7 +17,7 @@
 
 ---
 
-### B2. 前端帧数学截断不一致（高）
+### B2. 前端帧数学截断不一致（已修复）
 
 | 属性 | 值 |
 |---|---|
@@ -25,6 +25,7 @@
 | **描述** | Rust 端 `seconds_to_frame()` 使用截断 `(seconds * fps) as i32`（对应上游 `Int(s*fps)`），前端使用 `Math.round`（四舍五入）。当 `seconds * fps` 小数部分 ≥0.5 时，双方结果差 1 帧，导致同一媒体的计算时长不一致 |
 | **影响** | 媒体导入时的帧数计算偏差可能导致 clip 时长 off-by-1 |
 | **修复方案** | 将前端的 `Math.round(seconds * fps)` 改为 `Math.floor(seconds * fps)` |
+| **验证** | 媒体时长、搜索片段 trim 起点/时长、ripple insert 与默认文本时长统一使用向零截断；`seconds_to_frame_truncates_fractional_boundaries` 覆盖 24/30 fps 的半帧、帧边界和无效输入。仅播放头吸附等明确的 nearest-frame UI 交互继续使用 `Math.round`。 |
 
 ---
 
@@ -59,12 +60,12 @@
 | **描述** | GPU 合成的 infrastructure 已就绪（`composite_frame` Tauri 命令、`useTimelineFrame` hook 均存在），但 `Preview.tsx` 仍然使用 DOM `<video>`/`<img>` 路径渲染，未接入 `useTimelineFrame`。后果：看不到关键帧动画、transform/crop/text/effects，preview ≠ export |
 | **当前状态** | 已有完整的 wgpu 合成管线，只需在 Preview.tsx 中接入 `useTimelineFrame` hook |
 
-### D2. Agent/MCP 隐藏能力仍待生产后端（高）
+### D2. Agent/MCP Lottie 检查（已关闭）
 
 | 属性 | 值 |
 |---|---|
-| **位置** | `crates/opentake-agent/src/tools/names.rs`、`crates/opentake-agent/src/mcp/dispatch.rs` |
-| **描述** | 发现面当前只发布 38 个有真实执行路径的工具。`inspect_media` 已连接桌面媒体桥，可检查图片、视频和音频（Lottie 仍明确不支持）；GenerateVideo/Image/Audio、UpscaleMedia、AddMotionGraphic、EditMotionGraphic 保留兼容线名但不进入 `ToolName::ALL`、MCP/Chat 目录或系统提示。它们的生产后端仍是 Beta 功能缺口，不能按已交付计算。 |
+| **位置** | `src-tauri/src/mcp.rs`、`src-tauri/src/render.rs` |
+| **描述** | 已关闭：`inspect_media` 使用共享 Velato/Vello 管线在中性灰底上均匀采样 Lottie，返回尺寸、帧率、时长和真实 JPEG 帧；`inspect_timeline` 也不再跳过 Lottie 层。无效文档、离线源和无 GPU 环境返回类型化失败。 |
 
 ### D3. Media 缩略图始终返回 `None`（中）
 
@@ -114,7 +115,7 @@
 | **B3** | rippleDeleteRanges 忽略 clipId | 🟠 高 | Agent 工具精度下降 | 中 |
 | **B4** | canGenerate 硬编码 false（已修复） | ✅ 已关闭 | 动态生成能力已恢复 | — |
 | **D1** | 预览未接入 GPU 合成 | 🟠 高 | 所有编辑效果不可见 | 中 |
-| **D2** | Agent 工具 30% stub | 🟠 高 | AI 协作核心缺失 | 高 |
+| **D2** | Agent/MCP Lottie 检查 | ✅ 已关闭 | 真实抽帧与合成已恢复 | — |
 | **D3** | 缩略图始终 None | 🟡 中 | 媒体库 UX 差 | 中 |
 | **D4** | Export 仅 H.264 | 🟡 中 | 输出格式受限 | 低 |
 | **D5** | TextTab/AIEdit scaffold | 🟡 中 | 功能不完整 | 中 |
diff --git a/docs/architecture/CAPCUT-GAP.md b/docs/architecture/CAPCUT-GAP.md
index bca972f6..77d05ecd 100644
--- a/docs/architecture/CAPCUT-GAP.md
+++ b/docs/architecture/CAPCUT-GAP.md
@@ -6,17 +6,19 @@
 
 **整体差距**:总体判定:6 项里只有「基础线性变速」是 OpenTake 设计稿已完整覆盖(has);「50 条多轨道复杂工程」属于"数据模型已覆盖、但大工程性能尚未验证"的 partial;其余 4 项(复合片段嵌套、多机位自动对齐、高阶曲线变速、光流补帧)在上游 Palmier Pro 源码与 OpenTake 三份设计文档里都完全没有踪迹,均为 missing,且恰好对应上游 FAQ 自述「尚无特效/转场/调色/蒙版/图形」之外的另一类"高阶时间线能力"空白。\n\n关键证据链:① 上游 Clip 模型(Models/Timeline.swift:82-85)速度是单个标量 `var speed: Double = 1.0`,而非关键帧轨;可关键帧的属性枚举 `AnimatableProperty`(Models/Keyframe.swift:77-78)只有 opacity/position/scale/rotation/crop/volume,根本没有 speed → 曲线变速在现模型里不可表达。② 插值类型 `Interpolation` 只有 linear/hold/smooth(Models/Keyframe.swift:3-5),没有任意贝塞尔曲线。③ 对全仓做穷举式 grep,multicam/nested/compound/optical-flow/interpolation/speedCurve/retime/frameblending 这些关键词除了 SF Symbol 图标名"film"和被排除的 compoundPredicate 外零命中;导出器甚至把 `frameblending=FALSE` 写死(Export/XMLExporter.swift:336)。④ 唯一与"嵌套"沾边的是 saveClipAsMedia/saveTimelineRangeAsMedia(Editor/ViewModel/EditorViewModel+SaveAsMedia.swift),那是用 AVMutableComposition 把片段/区间烘焙成一个新扁平媒体的破坏性 flatten,不是活的嵌套序列;OpenTake 设计稿(MODULE-PORT-MAP.md:233)也只把它当 FFmpeg flatten 处理。⑤ 轨道是无上限的 `tracks: [Track]` 数组,没有任何 maxTracks 闸门;多轨编辑逻辑(OverwriteEngine/RippleEngine/SnapEngine)已被 Phase 1 完整规划进 opentake-domain/opentake-ops,所以 50 轨的难点不在"功能缺失"而在 wgpu 合成器/预览引擎(架构文档点名的两大 blocker)能否扛住几十轨逐帧合成的性能。\n\n补齐落点优先级:p0 = 先保证 50 轨工程在 wgpu 合成器/预览引擎上的可用性能(否则其余高阶能力无处施展);p1 = 曲线变速(需把 speed 升级为关键帧轨 + 重做 setpts/RenderPlan 时间映射,工程量中等但牵动核心模型);p2 = 复合片段嵌套(架构性较大,建议先做"非破坏 flatten 缓存"过渡)、多机位自动对齐(可用 FFmpeg 音频互相关纯本地实现,工程独立);p3 = 光流补帧(唯一需要 ML 模型/外部 API、且对画质一致性要求最高的 blocker 级特性,放最后)。
 
+> **2026-07-31 状态更新**：上面的总体判定与证据链是实现前的上游历史基线。当前 OpenTake 已完整覆盖「基础线性变速」「复合片段嵌套」和确定性本地光流补帧；「50 条多轨道复杂工程」仍是性能待验证的 partial；多机位自动对齐与高阶曲线变速仍为 missing。当前状态以各条目的验证证据为准。
+
 ### 高达 50 条多轨道复杂工程 — `partial` · 难度 high · 优先级 p0
 - **判定依据**:上游轨道为无上限 `tracks: [Track]` 数组,全仓无 maxTracks/track limit 闸门;多轨编辑算法 OverwriteEngine/RippleEngine/SnapEngine 已是纯函数,OpenTake 已在 Phase 1 规划进 opentake-domain/opentake-ops(ROADMAP.md:10-17、MODULE-PORT-MAP.md:233、304)。但架构文档(ARCHITECTURE.md:22-27)明确把 wgpu 帧合成器与播放/预览引擎列为两大 🔴 blocker,且 PoC 场景只到『单轨视频+1个 transform 关键帧+1条字幕』(ROADMAP.md:29)——几十轨逐帧『解码→采样关键帧→仿射/裁剪/混合→多轨合成』的实时性能完全未验证。结论:数据模型与编辑逻辑层 has,但大工程的渲染/预览性能 partial。
 - **落点(crate/层)**:opentake-render(wgpu 合成器 + 预览后端,性能关键)+ opentake-domain/opentake-ops(模型与算法,已覆盖)
 - **实现方案**:模型与编辑无需新增,直接沿用既定移植。性能侧需在 wgpu 合成器做工程化:(1) 每帧只对『当前帧实际可见、未被上层完全遮挡且 opacity>0』的轨道解码合成,跳过空轨/全透明轨;(2) ffmpeg 解码器池 + 帧缓存,避免每轨重复 seek;(3) 预览分辨率降档 + scrub 丢帧到最新请求(架构已提该策略 ARCHITECTURE.md:130、MODULE-PORT-MAP.md:308);(4) RenderPlan 预计算每帧合成指令,wgpu 端用单 render pass 批量混合多层纹理。全部跨平台 Rust/wgpu,无需外部依赖。
 - **前置依赖**:强依赖 wgpu 帧合成器(blocker 1)与播放/预览引擎(blocker 2)先落地;Phase 3/4 完成后才能压测 50 轨
 
-### 新建复合片段(工程嵌套 / nested compound clip) — `missing` · 难度 high · 优先级 p2
-- **判定依据**:上游领域模型只有扁平的 Timeline→Track→Clip,Clip 永远指向单个 media_ref(asset id),没有『Clip 引用一个子 Timeline』的类型(Models/Timeline.swift)。全仓 grep nested/compound 零命中(仅 SF Symbol 与被排除的 compoundPredicate)。唯一相邻能力是 saveClipAsMedia/saveTimelineRangeAsMedia(EditorViewModel+SaveAsMedia.swift:8/60),用 AVMutableComposition 把片段或时间线区间烘焙成一个新的扁平 mp4/m4a 媒体——这是破坏性 flatten,不可再编辑内部,且 OpenTake 设计稿(MODULE-PORT-MAP.md:233)也只把它当 FFmpeg flatten 移植。真正的『活的嵌套序列/精简图层』完全缺失。
+### 新建复合片段(工程嵌套 / nested compound clip) — `has` · 难度 high · 优先级 p2
+- **判定依据**:OpenTake 现已具备持久化 `nestedSequenceId` 与子时间线注册表、依赖和循环校验、共享撤销路径下的创建/进入/编辑/重命名/移动/修剪/复制/解散、递归 RenderPlan 展开，以及预览/导出共用的扁平计划。精确 round-trip、递归渲染、循环拒绝测试和 2026-07-31 的打包 macOS 实机流程均通过；实机完成创建、进入、修剪、移动、联动音视频复制粘贴、保存重开、连续预览和 231 帧 H.264/AAC 导出。证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md`。
 - **落点(crate/层)**:opentake-domain(新增 nested 片段类型与子 Timeline 引用)+ opentake-ops(进入/退出嵌套、子树编辑命令)+ opentake-render(嵌套 RenderPlan 递归展开/物化)+ opentake-project(子序列序列化)
-- **实现方案**:分两步落地,优先级有别。【过渡方案,先做】把上游 saveTimelineRangeAsMedia 的 flatten 用 FFmpeg/wgpu 重写为『一键打组烧成内部媒体』(content-hash 缓存,源区间改了才重烧),立即满足『精简图层』的视觉诉求,纯本地、工程小。【完整方案,后做】在 domain 新增 `MediaSource::Nested(child_timeline_id)` 或独立 `CompoundClip{child: Timeline}`,Clip 可引用子 Timeline;RenderPlan 生成时对嵌套节点递归展开成扁平合成指令(或先渲染子序列为离屏纹理再当单层合成,二选一按性能定);ops 增加 enter/exit 嵌套、子树内复用既有 OverwriteEngine/RippleEngine。全程跨平台 Rust/wgpu,无外部模型。
-- **前置依赖**:完整方案依赖 wgpu 合成器支持离屏渲染/递归 RenderPlan;过渡 flatten 方案依赖导出/FFmpeg 链路可用即可
+- **实现方案**:已采用活的子时间线模型而非破坏性烘焙：父 Clip 保存子序列引用，子树复用既有编辑命令并由根命令提供单次撤销；渲染计划递归展开并对非法循环、缺失引用及当前不支持的复合级像素效果明确失败。Web 时间线提供创建、进入/返回、重命名与解散入口。
+- **前置依赖**:功能实现与 macOS 打包验证已完成；Developer ID/公证和 Windows UI 实机属于独立发布验收，不在本条功能完成声明内。
 
 ### 多机位自动对齐剪辑(multicam auto-sync) — `missing` · 难度 medium · 优先级 p2
 - **判定依据**:上游与 OpenTake 三份设计文档全无 multicam/angle/sync-cam/多机位 任何痕迹(穷举 grep 仅命中无关的 sync-locked 轨道锁与 audio/video 链接 link_group)。上游的 A/V Link(同 link_group_id 作为一个单位移动,ARCHITECTURE.md:113)只是单机位音画捆绑,与多机位多角度对齐切换是两回事。该能力 0 覆盖。
@@ -36,11 +38,11 @@
 - **实现方案**:纯本地 Rust,不需外部模型。(1) domain:把速度从标量升级为可选 `speedCurve: KeyframeTrack<f64>`(或独立 time-remap 曲线,关键帧值=源时间或瞬时速度),复用现有 sample/smoothstep 框架,新增 bezier 段以支持平滑加减速;(2) 核心是时间映射:对速度曲线做累积积分得到『时间线帧→源帧』的单调映射函数,ops 据此重算 durationFrames 与 trim,split/ripple 钳制逻辑要按曲线重做;(3) render:导出走 FFmpeg setpts='非线性表达式' 或预采样成密集 sendcmd/逐帧 PTS(类比上游 smooth 段 8 等分细分思路 MODULE-PORT-MAP.md:347),预览在 wgpu 端按映射取源帧。难点在曲线积分与帧对齐的数值一致性。
 - **前置依赖**:依赖基础线性变速链路先稳;依赖关键帧采样框架(已有);若要配合补帧出丝滑慢动作则进一步依赖光流补帧
 
-### 光流法智能补帧(optical-flow frame interpolation) — `missing` · 难度 blocker · 优先级 p3
-- **判定依据**:上游零实现:穷举 grep optical/interpolat(非关键帧插值)/RIFE/FILM/motion-interpolat 全部零命中;导出器把 frameblending 写死为 FALSE(XMLExporter.swift:336),连最基础的帧混合都不开。OpenTake 媒体引擎清单(ARCHITECTURE.md:123-137)涵盖解码/合成/字幕/转写/语义搜索,但完全没有补帧/插帧条目。该能力 0 覆盖,且是本模块技术门槛最高的一项。
-- **落点(crate/层)**:opentake-media(补帧推理:本地 ort/candle 跑光流或学习式插帧模型;或 opentake-gen 走外部 API)+ opentake-render(变速/慢动作时按需调用补帧填充中间帧)
-- **实现方案**:需要算法/模型,分两条路权衡:【本地优先】用 ort(onnxruntime,项目已用于 SigLIP2)或 candle 加载学习式插帧模型(RIFE/FILM 系)做两帧间插值,GPU 加速(wgpu/CUDA 视平台),完全离线、无云成本,契合 OpenTake 自托管定位;退一步可用传统光流(Farneback,OpenCV/纯 Rust 实现)做 warp,质量弱但零模型依赖。【外部 API 兜底】接 fal.ai/Replicate 的插帧端点(经既有 opentake-gen BYOK/代理),省去本地集成与算力,但要联网且按量计费。建议:慢动作变速场景默认本地补帧,质量不够再降级为帧混合/最近帧。这是 blocker 级:模型体积、跨平台 GPU 推理、与变速曲线的帧对齐都需打通。
-- **前置依赖**:依赖 ort/candle 推理链路(语义搜索已铺,可复用)与 GPU 推理后端;强依赖高阶曲线变速一起用才有意义;模型权重分发与许可需先确认
+### 光流法智能补帧(optical-flow frame interpolation) — `has` · 难度 blocker · 优先级 p3
+- **判定依据**:上游仍为零实现；当前 OpenTake 已在 `opentake-media` 落地确定性的局部分块运动估计、双向 warp 与混合，在 `opentake-render` 建立显式 source/target FPS、OpticalFlow/Blend/Nearest 模式和 Blend/Nearest/Error 降级策略，并让高质量暂停预览与导出使用相同解析策略。24→60 fps 的像素/时序测试固定首尾时间戳、精确目标帧数、反向局部运动与不支持设备降级。打包 macOS 工程已用 48 帧/2 秒的 24 fps 素材验证 120 帧、60/1 fps、2.000 秒 H.264 导出；第 1 帧预览/导出运动边界一致，SSIM 0.999515。证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-real-device-2026-07-31.md`。
+- **落点(crate/层)**:`opentake-media`（帧率映射、局部分块运动场、双向重采样、显式降级）+ `opentake-render`（共享纹理解析契约）+ `src-tauri/render.rs` / `src-tauri/export.rs`（生产预览/导出接线）
+- **实现方案**:当前基线为完全离线、无模型权重与云成本的传统局部 block-matching 光流。它按固定块和有限搜索半径计算亮度 SAD，确定性打破并列候选，按目标 alpha 将两个端点向中间时刻双向 warp 后混合；不可用时由调用方明确选择帧混合、最近帧或 fail-closed。后续若追求极端运动/遮挡质量，可在不改变 render 契约的前提下替换为 RIFE/FILM/RAFT 等模型后端。
+- **前置依赖**:当前本地基线无外部模型依赖；模型级升级才依赖 ort/candle、GPU 后端、权重分发与许可。低延迟连续播放流仍采用独立的实时帧归一化策略，不纳入本条高质量暂停预览/导出验收。
 
 ## 模块2:视觉特效与空间重构
 
@@ -58,14 +60,14 @@
 - **实现方案**:纯 Rust、零外部依赖、风险极低。① 把 Interpolation 从 enum 升级为可携参数:新增 CubicBezier{x1,y1,x2,y2}(用牛顿迭代或二分解 t,对齐 CSS cubic-bezier 语义)、Spring{stiffness,damping,mass} 或更简单的 Penner easing 预设集(easeIn/Out/InOut × Quad/Cubic/Quart/Quint/Sine/Expo/Circ/Back/Elastic/Bounce)。② sample() 的分支从 3 路扩到 N 路,smoothstep 作为默认保持向后兼容。③ 序列化保持 #[serde(default)] 容错——旧工程的 linear/hold/smooth 原样读;新曲线作为新 variant 追加。④ wgpu 合成器侧只需把『每段按曲线求 t』替换原 smoothstep,8 段细分对贝塞尔可提到 16~32 段保平滑。剪映的『物理级』本质是弹簧/惯性预设,用 Penner elastic/back + 可调阻尼即可覆盖 95% 体感,不必引真实物理积分器。
 - **前置依赖**:依赖现有关键帧引擎(Phase 1 已规划),不依赖 wgpu 合成器即可先在 domain 层完成并单测;最终视觉验证需 Phase 3 合成器
 
-### 蒙版工具(线性 / 圆形 / 钢笔 mask) — `missing` · 难度 medium · 优先级 p1
-- **判定依据**:上游完全没有蒙版能力。Clip 结构体无 mask 字段(Models/Timeline.swift:77-107);Crop 只是矩形四边内缩(left/top/right/bottom 归一化 0-1,Models/Timeline.swift、Keyframe.swift:65-74),不是任意形状遮罩,无羽化(feather)、无反转(invert)、无形状类型。源码里『mask』只出现在 SwiftUI 视图裁剪(GeneratingOverlay/TourOverlay)与 Search 文本 tokenizer 的 attention mask,与视频蒙版无关。AnimatableProperty 是封闭集 {opacity,position,scale,rotation,crop,volume}(Keyframe.swift:78),无 mask 项。
+### 蒙版工具(线性 / 圆形 / 钢笔 mask) — `has` · 难度 medium · 优先级 p1
+- **判定依据**:上游完全没有蒙版能力；OpenTake 已在 Clip 上持久化线性、圆形和钢笔/多边形蒙版及羽化、反相、偏移、缩放、旋转参数，wgpu 以共享 CPU/GPU SDF/even-odd 几何路径在预览与导出中合成。Inspector 支持创建、切换、增删点和删除蒙版，Preview 支持直接拖动多边形顶点，全部变更经过 `SetMasks` 的撤销/重做事务且不改源媒体；每片段最多 4 个蒙版、每个多边形 3–16 点由命令层显式拒绝越界，避免 GPU 静默截断。打包 macOS 工程已验证保存重开、偏移 0.100、旋转 20°、羽化 0.100、反相和真实 H.264 导出；第 60 帧预览/导出 SSIM 0.999753、PSNR 62.854540 dB。证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31.md`。
 - **落点(crate/层)**:opentake-domain(Clip 新增 mask: Option<Mask>,Mask 枚举 Linear/Radial/Rectangle/Ellipse/Pen{points},含 feather/invert/可关键帧化)+ opentake-render(wgpu 片元着色器算 mask alpha)+ web(前端蒙版手柄/钢笔锚点绘制)
 - **实现方案**:wgpu 片元着色器 + 纯几何,无需 AI。① 线性/圆形/矩形/椭圆蒙版:着色器内按当前像素 UV 到蒙版几何的有符号距离场(SDF)算 alpha,feather 用 smoothstep 在边界过渡带插值,invert 取 1-alpha,蒙版参数(中心/角度/半径/羽化)全部可挂关键帧(复用上面 easing 体系)。② 钢笔 mask:前端用贝塞尔锚点画闭合路径,Rust 端三角化(lyon crate)或在着色器里用 even-odd 环绕数判定内外 + 距离场做羽化。③ 蒙版作用对象 = 当前 clip 纹理的 alpha 通道,合成时按 z 序混合即可天然实现『局部显隐』。④ 与 Transform 解耦:蒙版坐标系绑定 clip 还是绑定画布需提供开关(剪映两种都有)。这是 wgpu 合成器最自然的扩展,上游因 AVFoundation layer 模型做不了,是 OpenTake 结构性优势点。
 - **前置依赖**:强依赖 wgpu 帧合成器(ROADMAP Phase 3)先落地;前端钢笔交互依赖 Phase 6 React Preview;关键帧化依赖 easing 体系
 
-### AI 运动追踪(自适应形变 motion tracking) — `missing` · 难度 high · 优先级 p2
-- **判定依据**:上游零实现且零基础设施:全目录 grep 不到 import Vision / VNTrackObjectRequest / VNDetectTrajectories / opticalFlow / 任何 tracking 相关(『tracking』命中全是 AppTheme 字间距 letter-spacing 与 NSTrackingArea 鼠标区,见 UI/AppTheme.swift:200、Timeline/TimelineView.swift:894)。关键帧只能手 K,无『跟踪点驱动关键帧』通路。
+### AI 运动追踪(自适应形变 motion tracking) — `partial` · 难度 high · 优先级 p2
+- **判定依据**:OpenTake Beta 已有本地区域块匹配的生产后端和能力门控 Agent 工具：在真实视频解码帧上跟踪归一化矩形，最多采样 48 帧，输出带算法版本与最低置信度的线性位置关键帧；低于 0.25 时返回稳定的 `MCP_ANALYSIS_LOW_CONFIDENCE`，取消、解码失败或工程版本竞争均不提交。`apply=true` 通过统一 `SetKeyframes` 事务写入可编辑 position track，并支持一步撤销。确定性移动目标测试在最终采样点保持小于等于 5 像素误差，真实 MP4 测试覆盖预览、应用、取消与撤销。Inspector 区域选取/进度交互和贴纸/文字绑定仍未完成，因此不判为 `has`。代码证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/motion-tracking-agent-backend-2026-08-01.md`。
 - **落点(crate/层)**:opentake-media(新增追踪 worker:ort/candle 跑光流或点追踪模型,输出逐帧 2D 轨迹)→ opentake-domain(把轨迹烘焙成 position/scale/rotation 关键帧)+ opentake-render(贴合 clip/蒙版/文字到轨迹)
 - **实现方案**:本地推理优先,双轨可选。① 平面/点追踪(剪映主力场景:贴文字/贴 logo 跟随):本地用 CoTracker / TAPIR(点追踪)或经典 Lucas-Kanade 光流(OpenCV-rust 或纯 candle 实现 KLT),输出目标点逐帧 (x,y[,scale,rotation]),再烘焙成现有 position/scale/rotation 关键帧轨——下游复用既有合成,改动面小。② 复用先例:上游已用 SigLIP2 经 ort/candle 做视觉嵌入(Search/Models/VisualEmbedder.swift、VisualModelLoader.swift),OpenTake 推理栈(candle/ort)已就位,追踪模型走同一条 ONNX/CoreML 通道,不必新搭 ML 基础设施。③ 『自适应形变』(网格变形跟随)较重,可二期:用 RAFT 稠密光流 + 薄板样条/网格 warp,在 wgpu 着色器里做形变采样。④ 外部 API 兜底:对追踪质量要求极高时可接 runwayml/第三方,但作为可选 BYOK,默认本地。
 - **前置依赖**:依赖 candle/ort 推理栈(设计稿已含,Phase 8 语义搜索同栈);关键帧烘焙依赖 Phase 1 关键帧引擎;形变贴合依赖 wgpu 合成器
@@ -82,8 +84,8 @@
 - **实现方案**:本地推理优先,与 chroma key 共用合成下游(都是给 clip 一张 alpha)。① 视频抠像本地模型:RobustVideoMatting(RVM,轻量、时序稳定、有 ONNX 权重)是首选,经 ort 跑,逐帧出 alpha;人像场景可用 MODNet/BiRefNet,通用前景可用 SAM2(分割+追踪一体,但较重)。② 复用上游已验证的 ONNX 推理通道(ort/candle + ModelDownloader 先例,Search/Models/ModelDownloader.swift),模型按需下载缓存,与 SigLIP2/whisper 同套基础设施。③ alpha matte 用 content-hash 缓存(ARCHITECTURE §6 已有物化缓存策略),避免重复推理。④ 外部 API 兜底:质量优先可接 fal/Replicate 的 matting 端点,作为 BYOK 可选(沿用 opentake-gen 双模),默认本地零成本。⑤ matte 出来后下游与 chroma key 完全一致(clip alpha → 多轨混合),边缘可再过 wgpu 羽化/前景色净化。
 - **前置依赖**:依赖 candle/ort 推理栈 + ModelDownloader(设计稿已含同类先例);依赖 wgpu 合成器消费 alpha;受益于追踪(SAM2 可一体化)
 
-### 视频防抖(stabilization) — `missing` · 难度 medium · 优先级 p2
-- **判定依据**:上游零实现:全目录 grep 不到 stabiliz/stabilis/VNDetectTrajectories/opticalFlow/任何防抖逻辑;无 Vision 框架引用。无运动估计基础设施。
+### 视频防抖(stabilization) — `has` · 难度 medium · 优先级 p2
+- **判定依据**:上游零实现；OpenTake 已落地本地运动估计和平滑补偿。Clip 持久化独立的防抖轨道（模型/版本、源身份、强度、额外裁切和逐帧平移/旋转关键帧），不覆盖手工变换或源媒体；渲染计划把补偿与手工变换组合，并按最坏位移/旋转自动安全缩放，预览与导出共用同一路径。Inspector 支持分析、重新分析、取消、强度/裁切调整、重置和完整撤销/重做；分析在后台阻塞任务运行，取消保持旧结果且不产生历史事务。打包 macOS 工程已验证 48 个运动采样、65% 强度、3% 裁切、保存重开、重置恢复与 H.264 导出；导出为 1920×1080、60 fps、120 帧，预览/导出第 0 帧 SSIM 0.999557、PSNR 56.843845 dB。证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/stabilization-real-device-2026-07-31.md`。
 - **落点(crate/层)**:opentake-media(防抖 worker:两遍分析——估计逐帧全局运动→平滑相机轨迹→反向补偿)+ opentake-domain(把补偿写成 position/scale/rotation 关键帧,或标记 stabilize 参数由 render 应用)
 - **实现方案**:成熟开源算法可移植,本地、无需重型 AI、难度中。① 最省力路线:直接复用 FFmpeg vidstab(vidstabdetect + vidstabtransform 两遍),OpenTake 已绑 ffmpeg-next(ARCHITECTURE §10),导出路径几乎零成本接入;实时预览可先用降采样代理。② 自研路线(更可控):光流/特征点(KLT)估全局仿射运动 → 用低通/高斯平滑相机路径 → 反向仿射补偿 + 自动裁掉边缘黑边(轻微放大)。补偿量可烘焙进现有 transform 关键帧轨,复用既有合成,无需新合成原语。③ 平滑强度/裁切比例作为可调参数。④ 可选 AI 增强(深度学习防抖如 DUT)作为远期 p3,默认经典算法已够用。
 - **前置依赖**:FFmpeg vidstab 路线仅依赖 ffmpeg-next(已有);自研路线依赖光流(与追踪共用);补偿应用依赖关键帧引擎/wgpu
@@ -101,13 +103,15 @@
 - **实现方案**:依赖蒙版先行,本地+云双轨。① 用户/AI 用蒙版工具(本模块第2项)圈出待消除区域(或 AI 自动分割出对象),生成逐帧 mask。② 本地推理:图像用 LaMa(ONNX,擦除效果好);视频用 ProPainter / E2FGVI(时序一致视频补全,有开源权重),经 ort 跑;轻度瑕疵/人脸可用更小模型。复用 RVM/SAM2/超分同套 ONNX 通道。③ 外部 API 兜底:fal/Replicate 的 video-inpaint / object-removal 端点作为 BYOK 可选(opentake-gen 双模),质量优先时用。④ 与 AI 抠像、追踪强协同:SAM2 可同时给分割 mask + 跨帧追踪,是消除/抠像/追踪三项的共享上游。结果回填为新片段或叠加层。这是模块2 里依赖链最长、工程量最大的一项。
 - **前置依赖**:强依赖蒙版工具(p1)产出区域 + AI 抠像/追踪(SAM2 共享)+ candle/ort 推理栈;视频 inpaint 模型较重
 
-### 通用视觉特效 / 滤镜(effects/filters)+ 调色 — `missing` · 难度 medium · 优先级 p0
+### 通用视觉特效 / 滤镜(effects/filters)+ 调色 — `has` · 难度 medium · 优先级 p0
+- **OpenTake 当前状态(2026-07-31)**:首个完整效果链竖切已落地。闭合注册表提供灰度、棕褐、反相三个真实 WGSL 滤镜，每项支持 0–100% 强度、启用开关和有序串联；领域/命令/渲染边界校验名称与参数，未知效果返回类型化错误而不静默直通。Inspector 的新增、上移/下移、调参、开关、删除均经同一个可撤销 `SetEffects` 命令；原生播放路由与导出复用同一 GPU 合成器。拥有测试覆盖每个滤镜默认/非默认像素基准、顺序可观察性和预览/导出逐字节一致；打包端真实工程还完成了保存重开、原生播放、H.264 导出和首帧一致性复核（SSIM 0.999838、PSNR 39.679823 dB），证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-real-device-2026-07-31.md`。更大的模糊、发光、LUT 和关键帧化库属于后续扩展，不影响本竖切的完成语义。
 - **判定依据**:上游 FAQ 明示『尚无特效/调色/图形』,源码坐实:Clip 无 effect/filter/colorGrade/lut 字段(Models/Timeline.swift:77-107);Preview 合成 grep 不到 CIFilter/blendMode/colorControls/任何调色或滤镜(Preview/CompositionBuilder.swift 等);AVVideoComposition 只做 transform/crop/opacity ramp。AnimatableProperty 封闭集无 effect。导出 XMLExporter 也只导 transform/crop/opacity/fade/音量,不导任何滤镜。
 - **落点(crate/层)**:opentake-domain(Clip 新增 effects: Vec<Effect> 效果链 + 调色字段/LUT 引用,Effect 参数可关键帧)+ opentake-render(wgpu 片元着色器效果库 + RenderPlan 串联效果链)+ opentake-agent(MCP 加 apply_effect 工具)
 - **实现方案**:wgpu 着色器效果框架 = 一切像素特效的地基,本地、无需 AI。① 在 RenderPlan 里给每个 clip 增加『效果链』:解码纹理 → 依次过 N 个着色器 pass → 合成。② 基础调色(剪映高频):brightness/contrast/saturation/exposure/temperature/tint/HSL/曲线,纯片元运算;专业级支持 3D LUT(.cube 加载为 3D 纹理,着色器三线性采样)对齐达芬奇/剪映滤镜包。③ 滤镜/特效:模糊(高斯/方向/径向)、锐化、晕影、颗粒、故障、复古、发光(bloom,需多 pass)等,逐个着色器实现,所有参数挂关键帧(复用 easing)。④ 效果链顺序、开关、强度可调。⑤ FFmpeg 滤镜(eq/curves/lut3d/gblur)作为导出兜底,但实时预览统一走 wgpu 保预览=导出一致(ARCHITECTURE §6 共享 RenderPlan 原则)。⑥ 这是上游被 AVFoundation 锁死、OpenTake 自写合成器后『整类能力解锁』的核心机会(MODULE-PORT-MAP.md:391 自渲染方案)。建议先搭『效果链 + 1~2 个调色 pass』的最小框架,再增量加效果。
 - **前置依赖**:强依赖 wgpu 帧合成器(Phase 3,项目命门);效果参数关键帧化依赖 easing 体系;前端调参 UI 依赖 Phase 6
 
-### 转场(transitions) — `missing` · 难度 medium · 优先级 p0
+### 转场(transitions) — `has` · 难度 medium · 优先级 p0
+- **OpenTake 当前状态(2026-07-31)**:首个可编辑、可持久化、可渲染的 clip-to-clip 转场竖切已完成。`Transition` 明确保存 `fromClipId`、`toClipId`、类型和帧时长；命令只接受同一视觉轨的直接相邻片段，超出双方可用安全 handle 的时长会明确拒绝而不是静默夹取。素材面板“转场”页已启用，可添加、改时长、删除，并共享全局撤销/重做；时间线接缝绘制转场标记。首批注册类型为交叉溶解，预览与导出复用同一 RenderPlan/GPU alpha-over 路径；拥有测试覆盖保存重开、过长拒绝、添加/修改/删除/撤销/重做，以及转场首帧、中点、末混合帧和切点的像素基准与预览/导出逐字节一致。打包应用还完成了旧模型迁移、删除/撤销/重做/重加、20 帧调时长、保存重开、跨切点播放和 920 帧完整导出；第 140 帧原生预览/导出对比为 SSIM 0.997060、PSNR 37.91 dB，证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/transition-real-device-2026-07-31.md`。更多 wipe/slide/3D 类型是后续库扩展，不影响本竖切完成语义。
 - **判定依据**:上游无真正转场引擎:Clip 无 transition 字段、轨道无 clip-to-clip 转场模型(Models/Timeline.swift);源码『transition』仅两处——AppTheme.Anim.transition(UI 动画时长,与视频无关)与 XMLExporter 把单边 fade 映射成 Final Cut 的 Cross Dissolve/Cross Fade 导出占位(Export/XMLExporter.swift:296-341,且注释明示『no clip-to-clip model』『single-sided』)。所谓『matte 转场』只是 Agent 用 crop 关键帧做信箱遮罩的提示词技巧(AgentPanelView.swift:20),非转场原语。现有只有 fade in/out(fadeInFrames/fadeOutFrames + 插值,Timeline.swift:87-90),是单片淡变不是双片转场。
 - **落点(crate/层)**:opentake-domain(新增 Transition 模型:轨道上两相邻 clip 之间的转场区,含类型/时长/参数;或 clip 持 transition_in/out)+ opentake-ops(转场区与覆盖/波纹/分割的交互算法)+ opentake-render(wgpu 双源混合着色器)+ opentake-agent(MCP add_transition 工具)
 - **实现方案**:wgpu 双纹理混合着色器 + 时间线模型扩展,本地无 AI。① 数据模型:在两相邻 clip 重叠/接缝处定义转场区(duration、type、参数),需扩展 ops 层处理转场区与 ripple/overwrite/split/trim 的交互(这是逻辑难点——上游编辑算法纯按 clip 区间,引入转场区要保证不破坏对齐)。② 渲染:转场区内同时解码前后两 clip 的帧,着色器按进度 t(挂 easing)混合——溶解(crossfade,两纹理 alpha 插值)、擦除/滑动(wipe/slide,按 UV 阈值/位移切换)、缩放/旋转、模糊溶解、亮度/亮片过渡等,GL Transitions 开源库有大量现成着色器可直接移植到 wgsl。③ fade in/out 作为退化的单边转场保留兼容。④ 导出可继续映射到 XMEML Cross Dissolve(上游已有)+ wgpu 烧录非标准转场。⑤ 建议先做 crossfade(改动最小)验证转场区与编辑算法的交互,再铺开 wipe/3D 等。
@@ -125,7 +129,8 @@
 - **实现方案**:纯本地 wgpu 方案,零外部模型:在合成片元着色器里把每帧像素 BT.709→线性光(去 gamma)后,以 f32 RGB 跑统一调色链,最后线性→BT.709 编码回去。这是其余 5 项特性的公共底座——色轮/曲线/HSL/LUT 都是这条链上的算子。domain 加 ColorGrade{exposure,contrast,saturation,temp,tint,lift/gamma/gain,curves,hsl,lut_ref}(全 #[serde(default)] 保证读旧工程不破),render 把它编进 RenderPlan 逐 clip 传 uniform/storage buffer。预览与导出共享同一 RenderPlan 保证像素一致(对齐 ARCHITECTURE.md:120)。导出走 ffmpeg 编码前在 wgpu 已调好,无需 ffmpeg 调色滤镜。
 - **前置依赖**:强依赖 Phase 3 wgpu 帧合成器 blocker 先打通(ARCHITECTURE.md:24 列为🔴命门);需先确立'线性光工作空间'与色彩管理约定(BT.709 解码/编码节点)。
 
-### 色轮(暗部 lift / 中灰 gamma / 亮部 gain 矩阵) — `missing` · 难度 medium · 优先级 p1
+### 色轮(暗部 lift / 中灰 gamma / 亮部 gain 矩阵) — `has` · 难度 medium · 优先级 p1
+- **OpenTake 当前状态(2026-07-31)**:`ColorGrade` 已持久化三组 RGB lift/gamma/gain，Inspector 可逐通道调节并走统一 `SetColorGrade` 撤销/重做。CPU 参考与 WGSL 锁定同一线性光公式 `gain * pow(max(x + lift * (1 - x), 0), 1 / gamma)`：lift 向高光滚降、gamma 塑形中灰、gain 独立控制高光。所有字段按 Inspector 范围做有限数校验，gamma 严格大于 0；命令在变更前拒绝恶意输入，合成器在解析素材前拒绝损坏持久化值。拥有 GPU 测试覆盖三通道非中性参数、CPU/源公式一致、预览/导出逐字节一致和无副作用拒绝。打包应用已完成可见调节、四步撤销/重做、保存重开、播放和 920 帧完整导出；第 0 帧预览/导出 SSIM 0.999283、PSNR 38.47 dB，证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/lgg-real-device-2026-07-31.md`。
 - **判定依据**:grep lift-gamma-gain/colorWheel 上游命中 0;Clip 模型与 6 条关键帧轨(Models/Timeline.swift:102-107)均无颜色通道;设计稿无色轮规划。属浮点调色引擎之上的标准算子,上游/OpenTake 均未覆盖。
 - **落点(crate/层)**:opentake-render(着色器内 lift/gamma/gain 数学)+ opentake-domain(ColorGrade 内 lift/gamma/gain 各一组 RGB 偏移)+ web 前端(三色轮 UI 控件)
 - **实现方案**:纯本地着色器数学,DaVinci 经典公式:out = gain * (in + lift*(1-in)) ^ (1/gamma),三参数各为 RGB 三通道向量。在线性光空间(浮点引擎已建)对每像素做一次乘加+幂运算即可,GPU 成本极低。前端三个色轮控件输出 RGB 偏移,经 Tauri command 写 ColorGrade,走 SetColorGrade 命令入 UndoStack。可叠加关键帧化(复用上游关键帧采样 hold/linear/smoothstep 算法,但需为颜色新增关键帧轨,工作量在 domain 侧)。
@@ -137,14 +142,16 @@
 - **实现方案**:纯本地方案:前端用控制点定义曲线,Rust 端把每条曲线在 CPU 预烘焙成 1D LUT(256/1024 项),作为 1D 纹理上传,着色器对 R/G/B 各通道做 1D 纹理采样(textureSample)即可,运行时零计算开销。曲线插值可复用 Catmull-Rom 或单调三次样条(可直接引 crate splines)。Master 曲线作用于亮度或三通道统一,RGB 各自独立。注意曲线应在合适色彩空间(常用 gamma 编码空间而非线性,需与色轮顺序明确定义)。
 - **前置依赖**:依赖'高阶浮点调色引擎'(P0);需明确调色链内曲线相对色轮/LUT 的次序。
 
-### HSL 分区调色 — `missing` · 难度 medium · 优先级 p1
-- **判定依据**:grep HSL/hue/saturation 上游命中 0(全部 color 标识符均为 UI 主题色 primaryColor/TrackColor/textColor,见 grep 统计);Clip 无颜色字段;设计稿无规划。
+### HSL 分区调色 — `has` · 难度 medium · 优先级 p1
+- **OpenTake 当前状态(2026-07-31)**:`ColorGrade` 已持久化可环绕的色相中心/范围、羽化、色相偏移、相对饱和度和明度偏移，并在命令与合成器入口拒绝非有限或越界值。CPU 参考与 WGSL 共享圆周色相距离和 smoothstep 羽化，灰色像素不被误选；Inspector 提供启用、六参数编辑和重置，全部走统一 `SetColorGrade` 撤销/重做。真实 Metal/wgpu 四色色卡测试证明选中红色改变、边界橙色只受羽化影响、绿/蓝保持在 2 码容差内，预览/导出逐字节一致。打包应用已完成可见蓝转紫、五步撤销/重做、重置恢复、保存重开、原生播放和 920 帧完整 H.264/AAC 导出；证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/hsl-secondary-real-device-2026-07-31.md`。
+- **判定依据**:上游仍无 HSL/hue/saturation 调色实现；本状态描述的是 OpenTake 已完成的增强能力。
 - **落点(crate/层)**:opentake-render(着色器内 RGB↔HSL 转换 + 分区加权)+ opentake-domain(ColorGrade 内 8 个色相区的 H/S/L 偏移)+ web 前端(分区滑杆/取色器)
 - **实现方案**:纯本地着色器方案:片元着色器内把像素 RGB 转 HSL,按目标色相区(如红/橙/黄/绿/青/蓝/紫/品红 8 区)用平滑权重(基于色相距离的高斯/三角窗,避免硬边带)对落在该区的像素施加 H/S/L 偏移,再转回 RGB。这是 Lumetri/达芬奇 HSL Qualifier 的简化版。进阶可做'限定器'(luma/sat/hue 三维 key + 羽化),但首版做 8 固定区即可覆盖剪映同类能力。全部为本地像素数学,无需外部模型。
 - **前置依赖**:依赖'高阶浮点调色引擎'(P0);需 RGB↔HSL 着色器工具函数。
 
-### 3D LUT 导入 — `missing` · 难度 medium · 优先级 p1
-- **判定依据**:grep LUT/.cube/colorMatrix 上游命中 0;_analysis/02:11 明确上游无任何 GPU shader/CoreImage 滤镜;设计稿(含技术选型清单 ARCHITECTURE.md:172-190)无 LUT 解析或 3D 纹理规划。
+### 3D LUT 导入 — `has` · 难度 medium · 优先级 p1
+- **OpenTake 当前状态(2026-07-31)**:已实现 4 MiB 上限、严格元数据/DOMAIN 校验和完整 17/33 点表解析；导入只接受绝对路径的 no-follow 普通 `.cube` 文件，验证后按 SHA-256 原子发布到工程 `media/luts`，Clip 仅持久化无路径的 id/name/intensity。预览、原生播放、MCP 检查与导出共享同一哈希复验/解析/RGBA16F 3D 纹理三线性采样链，缺失或篡改时显式失败。Inspector 已提供导入、名称、强度、移除和撤销/重做。真实 Metal/wgpu 测试覆盖 identity、已知变换、预览/导出逐字节一致与损坏/过大拒绝；打包应用已完成可见导入、35% 强度、撤销/重做、移除恢复、保存重开、播放和 920 帧完整 H.264/AAC 导出，证据见 `docs/audit/2026-07-14/runtime-artifacts/automated/lut-real-device-2026-07-31.md`。
+- **判定依据**:上游仍无 LUT/.cube/colorMatrix 或 GPU shader/CoreImage 滤镜；本状态描述的是 OpenTake 已完成的增强能力。
 - **落点(crate/层)**:opentake-media 或 opentake-project(.cube/.3dl 文件解析 + 校验)+ opentake-render(3D 纹理三线性采样)+ opentake-domain(ColorGrade 内 lut_ref 指向工程内 LUT 资产 + 强度 0..1)
 - **实现方案**:纯本地、跨平台、无外部模型:Rust 端写 .cube 解析器(行业标准 ASCII 格式:LUT_3D_SIZE N + N³ 行 RGB,可参考 crate 'lut' 或几十行自写,顺带支持 .3dl/.cube 1D)。把 LUT 上传为 wgpu 3D 纹理(rgba16f),着色器对线性/log 输入做三线性插值采样,再按强度与原图 mix。LUT 应放进 .opentake 工程包(媒体清单管理,复刻 content-hash 缓存机制 ARCHITECTURE.md:121),clip 只存 lut_ref(=资产 id),与上游'clip 永不存路径'语义一致(_analysis/01:127)。需明确 LUT 期望的输入色彩空间(sRGB/Rec709/Log)并在采样前做对应转换,否则色偏。
 - **前置依赖**:依赖'高阶浮点调色引擎'(P0)的色彩空间约定;依赖工程包媒体管理(opentake-project,Phase 2 已规划)。
@@ -157,25 +164,25 @@
 
 ## 模块4:音频工程与智能字幕
 
-**整体差距**:总体判断:本模块在 OpenTake/上游中呈"字幕强、音频空"的两极分布。字幕侧上游有完整端上转写子系统(Transcription 模块)+确定性断句计时(CaptionBuilder)+一键生成(CaptionTab/generateCaptions)+ MCP 工具(add_captions/get_transcript),OpenTake 设计稿已在 ARCHITECTURE §6 与 Phase 8 明确把这套纯逻辑直译进 opentake-domain/opentake-media,并用 whisper-rs 替换 Apple Speech——故"高精度 ASR 一键转字幕"判 has。音频工程侧(响度统一/降噪/人声分离)经 word-boundary grep 确认上游零实现:全工程无 loudness/LUFS/EBU-R128/loudnorm/denoise/noise gate/vocal isolation/source separation/EQ/compressor 任一关键字(唯一的 VideoCompressor 是上传前视频体积压缩,与音频无关),音频能力只有 Clip 静态 volume(线性)+ volumeTrack 关键帧(以 dB 存,VolumeScale=20·log10,floor -60/ceil +15)+ fade in/out + track mute。OpenTake 设计稿同样只移植 volume 包络与 VolumeScale,未引入测量/降噪/分离——故三项音频修复全判 missing。字幕翻译上游仅以 LLM Agent 草稿提示形式存在(captionTask("translate the captions to X")→handoff 到聊天面板),非独立 MT 引擎,OpenTake 继承同一 agent 机制但无一等公民翻译能力,判 partial。字幕样式全局批量同步:上游用 captionGroupId 把同组字幕共享样式、get_timeline 把众数样式 hoist 进 shared,但无"改一处样式→批量回写整组"的命令(实际靠 agent 逐条 set_clip_properties),数据模型在、批量算子缺,判 partial。导出 .srt:上游 Export 仅有视频渲染(文字经 CoreAnimation 烤进画面)+ FCPXML/XMEML(XMLExporter 明确声明文字不导出)+ .palmier 打包,全工程零 .srt/.vtt/SubRip,OpenTake 文档亦从未提及字幕文件导出,判 missing。落地优先级:ASR 已覆盖(p0 仅指接 whisper);响度统一与 SRT 导出是高性价比纯 FFmpeg/纯逻辑补齐(p1);降噪 p1(FFmpeg 内置滤镜先行,深度学习降噪 p2);批量样式同步是低成本编辑命令(p1);人声分离需引入额外深度模型,工程量最大(p2);翻译可先靠 agent 兜底再补离线/外部 API(p2)。所有音频特性的"施加层"已存在(per-clip dB 增益 + FFmpeg 音频滤镜链),真正缺口在"分析/处理层"。
+**整体差距**:总体判断:本模块在 OpenTake/上游中呈"字幕强、音频处理逐项补齐"的分布。字幕侧 OpenTake 已用 whisper-rs + 确定性断句/计时完成一键字幕，并已补齐上游没有的 SRT/VTT 软字幕导出；前端、Tauri 文件边界和纯序列化层均已接通。音频工程侧已完成响度归一、本地智能降噪和限定范围的本地 centre/side 双 stem 提取，三者都接入真实预览/导出链；其中 stem 提取尚不等同于对任意混音进行语义级人声/伴奏分离，仍判 partial。字幕翻译仍只是 Agent 草稿路径，未形成一等公民翻译工作流，判 partial。字幕样式已具备 captionGroupId 与共享样式模型，但缺少"改一处→原子批量回写整组"的完整 UI/命令闭环，判 partial。当前落地优先级是字幕批量样式；语义级人声分离与一等公民翻译保持后续独立验收项。
 
-### 音频响度统一(loudness normalization / LUFS 归一) — `missing` · 难度 medium · 优先级 p1
-- **判定依据**:上游源码 word-boundary grep 对 loudness/LUFS/EBU/R128/loudnorm 全部 0 命中;音频模型仅 Models/Timeline.swift 的 volume(线性静态)+ volumeTrack(dB 关键帧)+ fadeIn/Out + track muted。VolumeScale(Inspector/InspectorView.swift:1072,20·log10,floor -60dB/ceil +15dB)证明只有手动增益、无任何自动测量/归一。OpenTake docs(MODULE-PORT-MAP Preview/Timeline 移植策略)只把 VolumeScale 与 volume 包络 direct-port,未提响度测量;ARCHITECTURE/ROADMAP 无任何响度相关条目。
-- **落点(crate/层)**:分析落 opentake-media(新增 audio analyze 模块,产出 integrated/true-peak/LRA);应用落 opentake-ops(新增 EditCommand::NormalizeLoudness,把目标 LUFS 反算成 clip 静态 volume 的 dB 增量,复用既有 VolumeScale/volume);单段也可走 opentake-render 导出期 FFmpeg loudnorm 二次扫描。
-- **实现方案**:纯 FFmpeg 跨平台,无需外部 API:用 ffmpeg ebur128 滤镜(或 loudnorm print_format=json 第一遍分析)测得每个音频源的 I/TP/LRA,按目标(常用 -14 LUFS / 短视频 -16 LUFS)算增益,写回 clip.volume(dB→linear 经 VolumeScale)。导出要严格达标时再走 loudnorm 双轨(linear=true,measured_* 回填)。本地算法,零模型、零联网。可做整轨/逐clip/全时间线三档。
-- **前置依赖**:依赖 opentake-media 的 FFmpeg 音频解码链(Phase 2 已规划);写回增益依赖 opentake-domain 的 volume/VolumeScale(Phase 1 已就绪)。无 blocker。
+### 音频响度统一(loudness normalization / LUFS 归一) — `has` · 难度 medium · 优先级 p1
+- **判定依据**:OpenTake 已实现本地 EBU R128/BS.1770 集成响度、门限分块和 4× 插值真峰值分析，并把目标 LUFS、真峰值上限、测量值和增益持久化在 Clip。操作可撤销/重做，检查器提供分析、重新分析、重置、进度、取消和静音/无法读取的类型错误。
+- **落点(crate/层)**:`opentake-media::analysis::loudness` 拥有纯 Rust 分析和增益计算；`opentake-domain::LoudnessNormalization` 拥有持久化合同；`opentake-ops::EditCommand::SetLoudnessNormalization` 拥有撤销语义；Tauri 分析命令、原生播放和导出混音复用同一增益与真峰值限制阶段。
+- **验收结果**:在重建的 macOS release `.app` 中，语音和音乐的 AAC 导出成品分别由独立 FFmpeg `loudnorm` 测得 `-16.07 LUFS / -1.15 dBTP` 与 `-16.02 LUFS / -1.74 dBTP`，均满足 `-16 LUFS ±1 LU` 且不超过 `-1 dBTP`。保存/重开保持可写和分析结果，静音文件在真实 UI 返回 `loudness_silent_audio`。详见 `docs/audit/2026-07-14/runtime-artifacts/automated/loudness-real-device-2026-08-01.md`。
+- **前置依赖**:已使用现有 FFmpeg 音频解码链和 Clip volume 包络完成，无外部 API、模型或联网依赖。
 
-### 智能降噪(noise reduction) — `missing` · 难度 medium · 优先级 p1
-- **判定依据**:上游对 denoise/noiseReduction/noiseGate/noiseFloor/spectralGate/audioFilter/AVAudioUnit 全部 0 命中,无任何音频效果链。Export 仅 audioMix 做音量混音(CompositionBuilder),无降噪节点。OpenTake docs 无降噪条目。
-- **落点(crate/层)**:opentake-media 新增 audio-fx 处理层(离线渲染音频片段→处理后 content-hash 缓存,与缩略图/波形缓存同构);opentake-domain clip 新增可空 audio_fx 描述字段,由 opentake-render 在合成/导出时插入 FFmpeg 音频滤镜链。
-- **实现方案**:分两档跨平台。轻量档(p1 先行):FFmpeg 内置 afftdn(FFT 频域)/anlmdn(非局部均值)/highpass+lowpass+agate(噪声门),纯本地零依赖,覆盖稳态底噪/嗡声/嘶声。深度档(p2):引入 RNNoise(成熟 C 库+Rust 绑定,可静态链接,跨平台)或用 candle/ort 跑 DeepFilterNet ONNX 做非稳态人声降噪(贴近剪映'智能降噪')。降噪做成可选音频效果而非破坏式,结果落 content-hash 缓存。避免调外部云 API。
-- **前置依赖**:需先有 opentake-media 音频解码/重编码 PCM 往返;深度档需 ort/candle 运行时(已在栈内用于 SigLIP2)+ 模型分发渠道(可学上游 SearchIndexConfig 静态 CDN 下载);需在 domain 增 clip 效果字段并打通 render 音频路径。
+### 智能降噪(noise reduction) — `has` · 难度 medium · 优先级 p1
+- **判定依据**:OpenTake 已实现自适应/人声两种本地频域降噪模式及可调强度，参数作为可空 `AudioDenoise` 合同持久化在 Clip，源素材保持不变。检查器提供预览开关、应用/重新应用、重置、进度、取消和撤销/重做；保存重开后项目仍可写且参数保持。
+- **落点(crate/层)**:`opentake-media::analysis::denoise` 是共享的纯 Rust FFT 处理 owner；`opentake-domain::AudioDenoise` 与 `opentake-ops::EditCommand::SetAudioDenoise` 分别拥有 wire/持久化和撤销语义；Tauri 原生播放与导出都调用同一参数和处理 owner，异步准备任务具备单飞、进度与取消。
+- **验收结果**:在重建的 macOS release `.app` 中，真实操作覆盖两种模式、强度、预览开关、应用/重置、长素材取消、撤销/重做、播放、保存重开和“预览关闭仍导出处理”。确定性语音加噪声夹具的 SDR 从 `10.414 dB` 提升至 `16.2872 dB`（`+5.8732 dB`），AAC 成片峰值为 `-8.645 dB`，无削顶。详见 `docs/audit/2026-07-14/runtime-artifacts/automated/denoise-real-device-2026-08-01.md`。
+- **前置依赖**:仅使用现有 PCM 解码/编码路径与新增纯 Rust FFT 处理，无云 API、模型下载或联网依赖。
 
-### 人声分离 / 提取人声(vocal isolation / source separation) — `missing` · 难度 high · 优先级 p2
-- **判定依据**:上游对 vocalIsolation/sourceSeparation/stemSeparation/demucs/spleeter 全部 0 命中(grep 命中的 stem 是 ToolExecutor+Import.swift 文件名变量,与音频无关)。无任何 stem 分离能力。OpenTake docs 无相关条目。
-- **落点(crate/层)**:opentake-media 新增 stem-separation 模块(输入音频源→输出 vocals/accompaniment 多轨 stem,落工程 media/ 作为派生素材);分离出的 stem 作为新 MediaAsset 回填,经 opentake-ops AddClips 放新轨,复用既有素材/轨道机制,无需改 domain 核心。
-- **实现方案**:必须引入深度模型,无纯 FFmpeg 等价。优先本地跨平台:用 ort(onnxruntime 已在栈)跑 Demucs(htdemucs)或 MDX-Net 的 ONNX 导出,GPU 可选 CPU 兜底;或集成成熟 C/C++ 推理库经 FFI。把分离做成异步任务(对齐上游 generate 的 job 语义:placeholder→ready),结果作为派生 stem 入库。次选:托管模式走 opentake-gen-proxy 外接分离 API。本地优先以保隐私与零成本。这是本模块工程量最大、最依赖模型与算力一项。
-- **前置依赖**:依赖 ort/candle 推理运行时 + 模型权重分发 + opentake-media 音频 IO + 任务/进度框架(可复用 opentake-gen job 状态机);GPU 加速可选。建议放在音频基建(解码/缓存/效果链)就绪之后。
+### 人声分离 / 提取人声(vocal isolation / source separation) — `partial` · 难度 high · 优先级 p2
+- **判定依据**:OpenTake 已提供可用的本地 `opentake-center-v1` centre/side 双 stem 提取：模型清单原子安装并校验 SHA-256，异步任务支持进度/取消/失败清理，vocals/accompaniment 作为带源素材和模型哈希 provenance 的派生素材原子回填工程。检查器明确显示本地不上传；托管模式必须填写 provider/model 并确认上传，但在无适配器时 fail-closed，当前不会发生网络上传。该本地算法适合人声/对白位于立体声中央、伴奏具有侧向差异的素材；它不是 Demucs/MDX 语义模型，对居中乐器、混响或单声道混音不能保证语义隔离，因此不判 `has`。
+- **落点(crate/层)**:`opentake-media::analysis::stems` 拥有安装、校验、解码、centre/side 处理和原子 WAV 发布；`opentake-gen::stems` 拥有本地/托管显式路由与隐私门槛；`opentake-core` 以普通 MediaAsset 批量导入两个 stem 并持久化 provenance；Tauri 单飞任务和 Inspector 提供进度、取消、恢复提示及直接预览。两路输出采用 stereo dual-mono，以兼容当前 mono 导出混音。
+- **验收结果**:重建的 macOS release `.app` 已验证托管门槛、本地分离、保存重开、直接预览、时间线播放、两路 H.264/AAC 导出和 1,800 秒任务取消清理。确定性 centre/side 夹具的直接 vocals/accompaniment SDR 分别为 `85.3732 dB` / `83.8316 dB`；导出 AAC 相对对应参考为 `34.1008 dB` / `25.5688 dB`。详见 `docs/architecture/STEM-SEPARATION.md` 与 `docs/audit/2026-07-14/runtime-artifacts/automated/stems-real-device-2026-08-01.md`。
+- **剩余差距**:若目标是任意混音的语义级人声/伴奏分离，仍需受校验的 Demucs/MDX 等本地模型及运行时，或实现经过隐私同意的托管 provider adapter；该能力保持独立验收项。
 
 ### 高精度 ASR 一键转字幕 — `has` · 难度 medium · 优先级 p0
 - **判定依据**:上游有完整链路:Transcription 模块(Transcription.swift/TranscriptCache.swift,词级+段级时间戳、语言匹配、缓存)、CaptionBuilder(确定性断句+按字符计时+最小时长防重叠)、EditorViewModel.generateCaptions(可见源区间转写→短语归属 clip→插新文本轨,一步撤销)、CaptionTab 一键 Generate Captions UI、MCP 工具 add_captions/get_transcript(ToolDefinitions.swift)。OpenTake 在 ARCHITECTURE §6(转写=whisper-rs,word/segment 时间戳)、Phase 8、MODULE-PORT-MAP Transcription 移植策略明确:数据模型与 CaptionBuilder/缓存/搜索算法 direct-port 进 Rust,ASR 引擎换 whisper-rs,上层'区间转写→切行→归属'逻辑不变。设计稿已完整覆盖。
@@ -195,10 +202,10 @@
 - **实现方案**:纯编辑层、零媒体依赖、低成本:按 captionGroupId 选出组内全部文本 clip,对 textStyle 做不可变 partial merge(字体/字号/颜色/背景/描边/对齐/大小写),复用既有 mutateClips 快照撤销与 timelineFrame 不变性;样式 patch 语义对齐 set_clip_properties 文本字段。可选支持'跨组/全工程所有字幕'范围与'仅改差异项'。高频刚需且实现廉价,建议早做。
 - **前置依赖**:依赖 opentake-domain captionGroupId 与 TextStyle(Phase 1 就绪)、opentake-ops 命令/撤销栈(Phase 1)、前端 Inspector(Phase 6)。无前置 blocker。
 
-### 导出 .srt 字幕文件 — `missing` · 难度 low · 优先级 p1
-- **判定依据**:上游 Export 模块(ExportService/XMLExporter/PalmierProjectExporter)对 .srt/.vtt/SubRip/WebVTT 全部 0 命中;导出只有三类——视频渲染(文字经 AVVideoCompositionCoreAnimationTool 烤进画面)、FCPXML/XMEML(MODULE-PORT-MAP 明确'文字不导出'/XMLExporter 注释声明文字叠加不进 XMEML)、.palmier 工程包。OpenTake docs(ARCHITECTURE/ROADMAP/MODULE-PORT-MAP Export)从未提及字幕文件导出。完全空白。
-- **落点(crate/层)**:opentake-project 或 opentake-render 导出层新增 subtitle exporter(纯函数 Timeline→SRT/VTT 文本);opentake-agent 可加 export_captions 工具;前端导出对话框加'导出字幕(.srt/.vtt)'选项。
-- **实现方案**:纯逻辑、跨平台、极低成本:遍历时间线文本/字幕 clip(优先 captionGroupId 组),按 startFrame/durationFrames 用 timeline.fps 反算时间码(SRT 用 HH:MM:SS,mmm 逗号毫秒;VTT 用点毫秒),按起始时间排序、合并同帧、输出标准 SubRip。帧→时间用既有 frameToSeconds(f/fps)、秒→时码做整毫秒;可选导出'烧录字幕'(已有,走视频渲染)对'软字幕文件'(本项)两条路。无外部依赖,纯字符串生成。建议同时支持 .vtt 便于 Web/平台分发。
+### 导出 .srt 字幕文件 — `has` · 难度 low · 优先级 p1
+- **判定依据**:上游仍没有 .srt/.vtt/SubRip/WebVTT 导出；OpenTake 已补齐并反超。`opentake-domain::subtitle_export` 从 caption clip 生成标准 SRT/VTT，Tauri `export_subtitles` 负责落盘并返回 cueCount，TitleBar 通过原生保存对话框提供两种格式且对完成、空字幕、失败给出可见反馈。
+- **落点(crate/层)**:`crates/opentake-domain/src/subtitle_export.rs`（纯 Timeline→SRT/VTT）→ `src-tauri/src/commands.rs#export_subtitles`（文件边界）→ `web/src/lib/api.ts#exportSubtitles` → `web/src/components/shell/TitleBar.tsx#onExportSubtitles`。
+- **验证**:`exports_non_empty_srt_with_cue_count` / `exports_vtt_with_header` 验证标准文件内容；`subtitle export menu routes srt and vtt` 与 TitleBar 交互测试验证 SRT/VTT 的扩展名、保存过滤器和 typed API 路由。真实工程文件导出证据另存审计 runtime artifact。
 - **前置依赖**:依赖 opentake-domain clip 时间字段与帧/秒换算(Phase 1 就绪);前端入口依赖导出 UI(Phase 6)。无 blocker。
 
 ## 模块5:AI 生成式创作(AIGC)
@@ -211,25 +218,29 @@
 
 对 OpenTake 的含义:四项里两项(图文成片、剪口播)OpenTake 设计稿已有"地基"(agent 工具层=opentake-agent、生成后端=opentake-gen、whisper-rs 转写、SigLIP2 搜索),且 ARCHITECTURE §7/ROADMAP Phase 7/report 04 已明确把 remove_filler_words/tighten_silences 列为"超越上游"的内置高阶工具——故判 partial。另两项(数字人、音色克隆)上游零代码、OpenTake 设计稿也完全未提,且本质都依赖外部生成模型,判 missing。所有四项的生成执行最终都要落到自建后端/BYOK(opentake-gen + opentake-gen-proxy)直连 fal/Replicate/ElevenLabs/HeyGen 等厂商,本地 Rust/FFmpeg/wgpu 只能承担编排、转写、静音检测、素材物化与落轨,不可能本地跑生成大模型。
 
-### 图文成片(文案指令 → 自动匹配素材 + 配音 + 转场 → 成片) — `partial` · 难度 high · 优先级 p1
+### 图文成片(文案指令 → 自动匹配素材 + 配音 + 转场 → 成片) — `has` · 难度 high · 优先级 p1
+- **2026-08-01 完成状态**:OpenTake 已提供 capability-gated `script_to_video` 与可视化“智能成片”面板。文案、确定的画面/旁白素材 ID、帧时长和转场先作为带 SHA-256/规划器版本来源的 `ScriptAssemblyPlan` 持久化到 `project.json`；未审阅或编辑后的计划不得直接应用。应用在一个 ops 事务中建立画面/旁白轨道、精确帧起点和相邻转场，失败/取消无部分写入，整体一步撤销。真媒体三分镜 fixture 已验证 3+3 画面/旁白对齐、两处转场、保存/重开和 18 帧 H.264/AAC 导出。下方历史判定/实现方案作为实现前背景保留。
 - **判定依据**:上游无一键成片功能,但构件齐全且 OpenTake 已规划对应层:① 编排能力=AgentPanelView.swift:13-35 的 starterPrompts("Generate an AI video"/"Generate B-roll: Inspect the current edit, identify sections...generate suitable B-roll, place it"/"Create a voiceover: Draft concise narration...add to audio track"),全靠 LLM agent 调原子工具涌现,AgentInstructions.swift:75-78 规定"Default flow: images first, then video"。② 配音=generate_audio 的 TTS 分支(AudioGenerationParams,云端;OpenTake report03 已逆向出 {kind:audio,prompt,voice,styleInstructions,...} 契约)。③ 素材匹配=端侧 SigLIP2 语义搜索(Search/,OpenTake 用 candle/ort 复刻)+ import_media 接外部 stock(ToolDefinitions.swift:431)。④ 转场=上游 FAQ 自承认"尚无",仅 fade 单边 dissolve(XMLExporter.swift:296)。OpenTake 设计稿:opentake-agent 工具层 + opentake-gen 生成 + 转写/搜索都已规划,但无"成片"高阶编排工具,也无真正的 transition 渲染。
 - **落点(crate/层)**:opentake-agent(高阶编排工具 + 系统提示词)为主;依赖 opentake-gen(TTS/视频生成)、opentake-media(whisper-rs 转写 + SigLIP2 搜索)、opentake-render(转场合成)、opentake-ops(批量落轨)。
 - **实现方案**:分两段。【编排即可达 80%】沿用上游"单一能力层、agent 编排"思路:在 opentake-agent 内置一个高阶工具/提示词模板 script_to_video(把"解析文案分镜→search_media 匹配本地素材/import_media 拉 stock→缺口走 generate_image/video→generate_audio TTS 配音→add_clips/add_texts 按节拍落轨"在 Rust 内编排成一次多步事务,易错的帧算术在 Rust 完成,只把创意决策留给 LLM)。生成执行走 BYOK/自建代理直连 fal/Replicate(opentake-gen 的 GenerationParams 联合类型已在 report03 设计)。【真转场需补 wgpu】上游本就只有 fade;若要做剪映式 dissolve/wipe/zoom 转场,必须在 opentake-render 的 wgpu 合成器里实现 clip-to-clip 双源混合(两段重叠帧按曲线 alpha/位移/缩放插值)——FFmpeg filter_complex 的 xfade 可作导出兜底但与预览难像素一致,推荐 wgpu 自渲染。配音建议优先"先转写脚本→TTS→落轨",时长按 audioTTSDurationSeconds=10s 默认(Constants,MODULE-PORT-MAP:1032)。
 - **前置依赖**:强依赖 opentake-gen 生成后端(BYOK/代理)先可用;转场依赖 wgpu 帧合成器(项目最大 blocker)落地;素材匹配依赖 SigLIP2 语义搜索与 whisper-rs 转写就绪;落轨依赖 ops 命令层。
 
 ### 智能剪口播(剔除无意义停顿与语气词 / filler & silence removal) — `partial` · 难度 medium · 优先级 p1
-- **判定依据**:上游无专用本地算法,且 OpenTake 已明确规划为"超越上游"的增强点。上游两条路径:① CaptionTab.swift:226-227 "Remove filler words (um, uh, er, like, you know)" 实为 LLM captionTask,只改字幕文本、"keeping each caption's timing unchanged",并不剪音视频;② 真正剪辑靠通用 agent:读词级 get_transcript(ToolDefinitions.swift:79)+ ripple_delete_ranges(ToolDefinitions.swift:282,"the fast path for filler-word/dead-air removal")组合,AgentInstructions.swift:65-69 反复警告"段视图有损、要把词级 transcript 当散文读"(说明这是踩坑痛点)。OpenTake 侧:ARCHITECTURE §7 与 ROADMAP Phase7 与 _analysis/04:227 均明确"内置 remove_filler_words / tighten_silences 高阶工具(参数化阈值),把读词→定位→ripple 在 Rust 内一次完成";转写已规划 whisper-rs(词/段时间戳)。故"语气词删除"设计层已覆盖且更强,但"无意义停顿检测"还缺一个真正的本地静音检测算法。
+- **判定依据**:上游无专用本地算法,且 OpenTake 已明确规划为"超越上游"的增强点。上游两条路径:① CaptionTab.swift:226-227 "Remove filler words (um, uh, er, like, you know)" 实为 LLM captionTask,只改字幕文本、保持原时码,并不剪音视频;② 真正剪辑靠通用 agent 组合词级 transcript 与 ripple。OpenTake 当前已把两条生产分析路径接通:`remove_filler_words` 从真实媒体桥读取词级项目帧,支持可配置单词/多词词典并返回逐条审阅范围;`tighten_silences` 从解码 PCM 做参数化 RMS 静音检测。二者均只预览,接受范围再由一个 `ripple_delete_ranges` 命令原子落地并一步撤销。无媒体桥时 filler 工具从 MCP/Chat 发现面消失。状态仍为 `partial`,因为审计要求的用户可见逐条接受/拒绝以及真实媒体保存/重开/导出实机证据尚未完成。
 - **落点(crate/层)**:opentake-agent(remove_filler_words/tighten_silences 工具,复用 ripple_delete_ranges 内核)+ opentake-media(whisper-rs 词级转写 + 新增基于 PCM 的 VAD/静音检测)+ opentake-ops(RippleEngine 已是纯函数,可直接承接区间删除)。
 - **实现方案**:全本地、跨平台,不需外部模型。【语气词】用 whisper-rs 拿词级时间戳,语气词识别两选一:轻量=内置多语停用词/语气词词典(um/uh/er/like/嗯/呃/那个…)直接命中;增强=可选调 LLM 给"哪些词是 filler"判定(只判定不算帧)。命中后把 [start,end] 词级区间喂给已移植的 RippleEngine::ripple_delete_ranges(MODULE-PORT-MAP:100 行该工具规格),linked A/V 同删、sync-locked 同移、放不下整体拒绝——帧算术全在 Rust,杜绝 LLM 帧错。【停顿/dead-air】用 Symphonia 解 PCM(波形管线已规划)做能量阈值 VAD:滑窗 RMS < 阈值且时长 > 最小静音时长(参数化,如 0.3s)即判为停顿,生成删除区间;同样走 ripple_delete。可选保留"留白"参数(每段静音保留 N ms 呼吸感)。导出为单步可撤销事务。
-- **前置依赖**:依赖 whisper-rs 转写(Phase8)就绪;停顿检测依赖 Symphonia PCM 波形管线(Phase2);区间删除依赖 RippleEngine(Phase1,已是纯函数);最好在 agent 工具层(Phase7)统一暴露。
+- **当前验证(2026-07-29)**:固定 30 秒、30 fps 的 linked video/audio 夹具中,词 `um` 的 `[6,12)` 帧删除后两轨均精确变为 `[(0,6),(6,894)]`,未接受的 `you know` 保留,一步 undo 恢复完整时间线。该回归同时发现并修复了 `clear_region` 在 linked split 后可能选中另一轨 right-half、留下重复中段的问题。保存/重开/导出和真实媒体 UI 流程仍待实机门禁。
+- **前置依赖**:代码依赖已接通:媒体桥词级转写、`CoreHandle` PCM 提取/静音检测和 `RippleEngine`;发布完成仍依赖上述实机门禁。
 
-### 虚拟数字人出镜(digital avatar / 数字人口播) — `missing` · 难度 high · 优先级 p3
+### 虚拟数字人出镜(digital avatar / 数字人口播) — `has` · 难度 high · 优先级 p3
+- **2026-08-01 完成状态**:OpenTake 已接入固定、可审计的 [fal `fal-ai/sync-lipsync/v3/image-to-video`](https://fal.ai/models/fal-ai/sync-lipsync/v3/image-to-video/api) 生产桥和“智能包裹 → 数字人”界面。仅接受项目内已探测的人像与音频素材；用户必须分别记录同意 ID 和确认外部成本。请求输入 SHA-256、请求哈希、provider/model/request id 写入生成来源，下载结果需通过视频+音频流与驱动音频一帧以内时长一致性检查，随后才在单个持久化事务中注册媒体并落轨。[fal 队列取消端点](https://fal.ai/docs/documentation/model-apis/inference/queue)已接入，取消/失败不产生半导入；一步撤销、保存重开及真实 H.264/AAC 导出由 fixture 集成测试覆盖。付费账号真实请求留在 Beta 实机清单，自动化不消费用户额度。
 - **判定依据**:上游完全没有。全仓库搜 avatar/digital human/lip-sync/talking head,只命中 Account/IdentityViews.swift 的 UserAvatar(账户头像 UI),零生成相关代码。模型目录的 Kind 枚举只有 {video,image,audio,upscale}(ModelCatalog.swift:126),responseShape 只有 {video,images,audio,upscaledImage},根本没有 avatar/lip-sync 类目;AudioCaps.category 只有 tts/music/sfx。OpenTake 的 ARCHITECTURE/ROADMAP/MODULE-PORT-MAP 三份设计稿也均未提及数字人。
 - **落点(crate/层)**:opentake-gen(新增 provider adapter + 一个新生成 kind=avatar/talking-head,落入 BackendGenerationParams 联合类型与 models catalog)+ services/opentake-gen-proxy(对接外部数字人 API);落轨复用 opentake-ops add_clips。
 - **实现方案**:本地无法实现(数字人=驱动型生成大模型,需 GPU 集群),必须调外部模型 API。沿用 OpenTake 既定"统一 job 抽象 + provider adapter"架构(report03 §4),新增一类生成:输入=一张人像图(或预置形象)+ 一段脚本文本或一条音频(可串联前面的 TTS/音色克隆产物),provider 调 HeyGen / D-ID / fal 上的 talking-head/lip-sync 模型(如 sadtalker/hallo/latentsync 类),后端只吃 URL(人像/音频先预签名上传),返回 resultUrls→下载落库→add_clips 落到视频轨。catalog 用 uiCapabilities 描述"需人像+音频/文本、时长上限、分辨率"。BYOK 模式下 Rust core 直连厂商。难度主要在外部依赖与成本,不在本地工程。
 - **前置依赖**:依赖 opentake-gen 生成后端骨架(job 状态机 + 上传预签名 + catalog 下发)先落地;通常需先有 TTS 或音色克隆产出音频作为驱动输入;无外部数字人 provider 则无法交付。
 
-### 音色克隆(voice cloning / 自定义音色) — `missing` · 难度 high · 优先级 p2
+### 音色克隆(voice cloning / 自定义音色) — `has` · 难度 high · 优先级 p2
+- **2026-08-01 完成状态**:OpenTake 已接入 [ElevenLabs Instant Voice Cloning](https://elevenlabs.io/docs/api-reference/voices/ivc/create) 注册、`eleven_multilingual_v2` TTS 和永久撤销生产桥，并提供“智能包裹 → 音色克隆”注册/生成/试听/撤销界面。参考音频 SHA-256、同意 ID、请求哈希、provider voice id 和撤销状态持久化到工程；注册后的生成音频经有界流式下载和媒体探测，在单个事务中导入落轨并可一步撤销。注册落盘/取消失败会清理远端 voice；voice 记录及撤销状态不进入普通工程 undo/redo，远端已不存在也按幂等撤销完成本地落盘，已撤销 voice 在调用 provider 前即拒绝。fixture 集成测试覆盖同意/成本、取消、provider 失败零导入、保存重开、撤销、撤销后禁用与普通 undo 无法复活。付费账号真实请求留在 Beta 实机清单。
 - **判定依据**:上游完全没有。搜 voice clone/voiceprint/custom voice/speaker embedding 零命中。TTS 的 voice 只能从后端 catalog 下发的【预设字符串枚举】里选:AudioCaps.voices 是 [String]?(ModelCatalog.swift:223),GenerationView.swift:852-856 的 voicePicker 仅 ForEach 预设 voices 列按钮,无任何"上传参考音频/录制样本/创建我的音色"入口;AudioGenerationParams.voice 也只是 String?(预设名),无 referenceAudio 字段用于克隆(AudioModelConfig.swift:3-9)。agent 侧同理,只暴露 voicesSample/voiceCount(ToolExecutor+Generate.swift:445-446)。OpenTake 三份设计稿亦未提音色克隆。
 - **落点(crate/层)**:opentake-gen(扩展 AudioGenerationParams 增加 referenceAudioURL/voiceId 字段 + provider adapter)+ services/opentake-gen-proxy(对接 ElevenLabs voice-clone / fal / MiniMax 等)+ 音色库管理(可存于 .opentake 工程或账户级)+ keyring 存厂商 key。
 - **实现方案**:本地无法稳定实现高质量克隆(需说话人编码+声码器大模型),走外部 API 最务实。两步:① 创建音色:用户提供参考音频样本→预签名上传→调 ElevenLabs Instant Voice Cloning / MiniMax voice clone 等→拿回一个 voiceId,存入音色库。② 使用:把该 voiceId 当作 TTS 的 voice 传入现有 generate_audio 流水线即可复用全部落轨逻辑。需扩展 OpenTake 既有的 AudioGenerationParams 联合类型(report03 已设计该 enum)加 referenceAudioURL/clonedVoiceId 字段,catalog 用 caps 标注"该模型支持克隆"。合规上需加"声音授权确认"。若坚持本地路线,可评估 OpenVoice/XTTS(candle/ort 跑)做轻量零样本音色迁移,但质量与多语稳定性远逊云端,定位为可选实验功能。
diff --git a/docs/architecture/EDITING-ENGINE-PLAN.md b/docs/architecture/EDITING-ENGINE-PLAN.md
index ab2251f9..56c708ec 100644
--- a/docs/architecture/EDITING-ENGINE-PLAN.md
+++ b/docs/architecture/EDITING-ENGINE-PLAN.md
@@ -31,6 +31,7 @@
 - 加入「带音频的视频」时,会在视频轨下方生成一条**独立的链接 audio clip**(共享 `linkGroupId`),trim/move 联动。
 - 门控条件(前端 `editActions.ts` `addLinkedAudio = item.type==="video" && item.hasAudio` → 后端 `place.rs` `should_link` 4 条件含 `spec.has_audio`)与上游 `EditorViewModel.swift:341` `shouldLink = addLinkedAudio && targetIsVideo && asset.type==.video && asset.hasAudio` **逐字一致**。
 - **无音频视频** → `has_audio=false` → 不建音轨(`probe.rs` 的 `channels==0` 守卫;`channels` 缺失保守保留,因 ffprobe 对真实音频必报 channels,且纯音频文件不能误杀)。
+- **验收结果(2026-08-01)**:Agent 的 `add_clips` / `insert_clips` owning tests 均证明 `has_audio=false` 时只保留视频 Clip 且 `link_group_id=None`；零声道 probe 测试也通过。重建的 release `.app` 在独立工程中导入一个确定性的 5 秒 H.264 无音轨文件，素材清单持久化 `hasAudio:false`，双击后时间线只出现 V1（无 A1/A2），播放推进正常；导出为 1280×720/150 帧 H.264 后 FFprobe 仍只报告视频流。详见 `docs/audit/2026-07-14/runtime-artifacts/automated/linked-audio-real-device-2026-08-01.md`。
 
 ### ⚠️ 待用户定夺(1:1 偏离决策)
 用户反馈「带音频的视频应把音频显示在视频片段内,而非独立 A1/A2 轨」。这与上游设计(独立链接音轨)**相悖**。两条路:
diff --git a/docs/architecture/FULL_PROJECT_SCAN_REPORT.md b/docs/architecture/FULL_PROJECT_SCAN_REPORT.md
index 0324b889..e2f97542 100644
--- a/docs/architecture/FULL_PROJECT_SCAN_REPORT.md
+++ b/docs/architecture/FULL_PROJECT_SCAN_REPORT.md
@@ -94,10 +94,10 @@
 - Shell 好 (short_id、encode_timeline、context_signal、dispatch 管道、描述 verbatim port)。
 
 **问题/风险**:
-- 38 个发现面工具均已脱离 `not yet implemented` 分支；`inspect_media` 已通过 Tauri `MediaBridge` 接入图片/视频抽帧及本地转写。
-- 生成/超分四个工具已接共享生产 GenerationBridge：仅在托管或兼容 BYOK 凭据可用时动态发布；Motion 两个兼容线名仍隐藏，Lottie 源检查仍明确不支持。
+- 最多 39 个基础工具均已脱离 `not yet implemented` 分支，并按主机媒体桥能力 fail-closed 过滤；`inspect_media` 与 `remove_filler_words` 已通过 Tauri `MediaBridge` 接入抽帧/本地转写与词级项目帧分析。
+- 生成/超分四个工具已接共享生产 GenerationBridge；Motion 两工具已接 Motion Canvas 3.17.2 + 本地 fallback 生产桥，并仅在 Chromium/FFmpeg 能力可用时动态发布。Lottie 源检查与时间线合成均已接共享 Velato/Vello 路径。
 - 生成作业已具备成本授权、耐久占位/日志、进度、取消、部分成功、失败码、重试与重启恢复；结果下载受协议/地址/大小/重定向约束并在探测后原子导入。
-- 严重性: **中**（生成主竖切已闭合；高级 AI workflow、Motion 与付费真实账号冒烟仍属发布验证项）。
+- 严重性: **中**（生成、Motion 与 Lottie 检查主竖切已闭合；高级 AI workflow 与付费真实账号冒烟仍属发布验证项）。
 
 **测试**: mcp_http.rs (传输) 存在；全工具执行弱。
 
@@ -142,7 +142,7 @@
 
 **Critical**:
 1. 预览不反映真实合成 (DOM 主导 + GPU 合成 infrastructure 已就绪但未接入 Preview.tsx) → [BUGS.md](BUGS.md#d1-预览未接入-gpu-合成高)
-2. Agent/MCP 的生成/超分/Motion 隐藏能力仍缺生产后端，`inspect_media` 尚缺 Lottie → [BUGS.md](BUGS.md#d2-agentmcp-隐藏能力仍待生产后端高)
+2. Agent/MCP Lottie 生产检查已关闭；剩余 Agent 目标按完成度计划继续验收。
 3. Media thumbnails 永远 None、import 无反馈/进度 → [BUGS.md](BUGS.md#d3-media-缩略图始终返回-none中)
 
 **High**:
diff --git a/docs/architecture/HANDOFF-2026-07.md b/docs/architecture/HANDOFF-2026-07.md
index ba4b2963..2b2a7b65 100644
--- a/docs/architecture/HANDOFF-2026-07.md
+++ b/docs/architecture/HANDOFF-2026-07.md
@@ -98,9 +98,9 @@ default-off Rust renderer or to perform the then-missing first device check.
 
 | Issue | 已做 | 剩余 |
 |---|---|---|
-| #13 进阶能力 | 调色链/绿幕/蒙版着色器(`8813df2`) | 转场(§3.9)、AI 推理(#27)、音频工程(#28) |
+| #13 进阶能力 | 调色链/绿幕/蒙版着色器(`8813df2`)、首个交叉溶解转场竖切(§3.9) | 扩展转场库、AI 推理(#27)、音频工程(#28) |
 | #25 Inspector/MediaPanel tab | 关键帧钻石(#187)、Text MVP(#107)、Captions(#184) | AI-Edit tab、Music tab(§3.6) |
-| #29 进阶纯逻辑 | SRT/VTT 纯逻辑(#110)、字幕批量样式纯逻辑(#113) | 两者接 UI/命令;曲线变速(§3.10)、多机位、复合片段 |
+| #29 进阶纯逻辑 | SRT/VTT 已接 UI/Tauri 命令(#110)、字幕批量样式纯逻辑(#113) | 字幕批量样式接 UI/命令；曲线变速(§3.10)、多机位、复合片段 |
 | #37 全局素材库 | 后端+前端全量(#104/#106/#115) | 库→时间线拖拽、媒体面板星标迁 `library_favorite` |
 | #48 片段编辑收尾 | 右键菜单(Copy/Swap 已接)、nudge/间隙/ripple(#186) | **Save as Media 仅前端菜单占位,后端零实现**(§3.5) |
 | #131 编解码/无缝切换 | 播放路径已被流式引擎取代 | ffmpeg 未随包分发(§3.12) |
@@ -138,7 +138,7 @@ default-off Rust renderer or to perform the then-missing first device check.
 
 - **现状**:`web/src/components/agent/AgentPanel.tsx` 仅渲染占位文案;`crates/opentake-agent/src/` 只有 mcp/plugin/prompt/signal/tools,**无会话循环**。
 - **怎么写**(对照上游 `Sources/PalmierPro/` 的 Agent 聊天 UI 结构):
-  1. 后端 `crates/opentake-agent/src/chat/`:会话结构(消息历史 + streaming)+ LLM 调用走 `opentake-gen` 的 provider/keys 基建(BYOK,钥匙串已有);工具调用直接复用统一 dispatch(当前发现面 38 个真实路径工具；44 个兼容线名保留在 `KNOWN`)。
+  1. 后端 `crates/opentake-agent/src/chat/`:会话结构(消息历史 + streaming)+ LLM 调用走 `opentake-gen` 的 provider/keys 基建(BYOK,钥匙串已有);工具调用直接复用统一 dispatch(基础集合最多 39 个、按主机能力过滤，另有 4 个动态生成工具；45 个兼容线名保留在 `KNOWN`)。
   2. `src-tauri` 命令:`chat_send`/`chat_history`/`chat_cancel` + `chat_delta` 事件流(参照 `transcribe` 的进度事件模式)。
   3. 前端:AgentPanel 消息列表 + streaming 渲染 + 工具调用卡片;Context Signal(`signal/`)注入系统提示已有,接上即可。
 - **验收**:面板内发"把这段静音剪掉"能走 tighten_silences 工具链并落 EditCommand;无 key 时有引导文案。
@@ -170,14 +170,15 @@ default-off Rust renderer or to perform the then-missing first device check.
 
 ### 3.8 【P1·用户加单】HDR v1 / 代理媒体 / 账号脚手架
 
-- **HDR v1**:`probe.rs:MediaProbe` 加 `color_primaries/transfer/matrix`(ffprobe 已能给);导出 `encode/preset.rs:80` 从硬编 BT.709 改透传;预览 wgpu 加 PQ/HLG→SDR tonemap pass(shader 链已有挂点)。
-- **代理媒体**:`opentake-media` 加 `proxy.rs`(ffmpeg 半分辨率 H.264 后台转码,进度事件);`MediaItemDto` 加 `proxyPath`;流式引擎 resolver 优先解代理、导出永远用原件;设置页加开关。
-- **账号脚手架**:可配置后端 URL 的登录面板(设置页新 pane),仅 token 存钥匙串 + 状态显示,**如实标注无官方后端**;不阻塞任何本地功能。
-- **验收**:HDR 素材导出色彩元数据不丢;4K 素材开代理后时间线流畅;账号面板断网不影响编辑。
+- **功能完成状态(2026-08-01)**:三个独立 child 均已通过，并由 `crates/opentake-render/tests/composite_acceptance.rs#hdr_proxy_account_children_close_one_composite_acceptance` 关闭同一个父验收。
+- **HDR v1 PASS**:`MediaColorMetadata` 持久化 primaries/transfer/matrix/range；PQ/HLG 在单帧、流式预览和导出共用路径进入 BT.709 SDR。运行时按实际 FFmpeg filter 能力选择 `scale_vt` 或 `zscale`，已修复 bundled sidecar 导出全黑。当前是明确的 SDR delivery policy，不声称 HDR passthrough。
+- **代理媒体 PASS**:项目内 `media/proxies/<uuid>.mp4` 以 H.264/AAC 原子生成并记录原件 SHA-256；设置开关驱动播放 resolver，导出只读原件。创建、目录祖先、授权、移除和重连均使用 exact-leaf/no-follow 约束，拒绝符号链接/Windows reparse；项目切换会取消在途转码，移除/重连在旧代理文件清理完成前持续持有项目身份租约。打包 GUI 已完成开关、播放、移除、重建、保存重开与原件导出验证。
+- **账号脚手架 PASS**:设置页如实标注无官方后端；远端只接受 HTTPS，本机回环 HTTP 仅作开发例外；token 只进钥匙串。失败登录和断网时，播放、编辑、保存与导出不被账号状态门控。
+- **证据与限制**:[`hdr-proxy-account-real-device-2026-08-01.md`](../audit/2026-07-14/runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md)。最新本地 `.app`/DMG 仅为 ad-hoc 签名且未 notarize，不能作为 Developer ID Beta 发布证据；完成度账本仍需在不覆盖用户改动的前提下重建文件清单。
 
 ### 3.9 【P2】转场(#13 切片,对标剪映)
 
-- **怎么写**:`opentake-domain` 加 `Transition { kind, duration_frames }` 挂在相邻 clip 对;`opentake-ops` 加 `SetTransition` 命令(校验相邻/时长夹取);`opentake-render` 合成器对重叠区做双纹理混合 pass(cross-dissolve 起步,shader 框架已有调色链可挂);前端时间线 clip 接缝处画转场标记 + Inspector 选型。**先 cross-dissolve 一种打通全链,再扩库。**
+- **完成状态(2026-07-31)**:cross-dissolve 首个竖切已打通。`opentake-domain::Transition` 持久化双方 clip ID、类型和时长；`SetTransition` 校验同轨、视觉源、直接相邻和最大 handle，过长请求显式失败。素材面板转场页支持添加/调时长/删除，操作进入统一 undo/redo，时间线接缝显示标记。RenderPlan 在转场区保持出片完整底层、以进度 alpha-over 入片，消除了旧双透明度造成的中点变暗；拥有测试 `crates/opentake-render/tests/transitions.rs#adjacent_clip_transition_is_editable_undoable_and_matches_preview_export` 覆盖保存重开、拒绝/恢复和四个关键帧的像素/预览导出一致性。后续工作仅是扩展 wipe/slide/3D 等转场库，不再属于首个竖切缺口。
 
 ### 3.10 【P2】曲线变速(#29 切片)
 
@@ -185,20 +186,20 @@ default-off Rust renderer or to perform the then-missing first device check.
 
 ### 3.11 【P2】流式音频分块解码(#160 剩余)
 
-- **现状**:播放前一次性 `extract_pcm` 全时间线预混(长工程首帧慢、改动即整段重混)。
-- **怎么写**:按 N 秒窗口分块解码 + 环形缓冲后台填充(cpal 回调只读环形缓冲,不破 lock-free);seek 丢弃未播块。参照 `playback/audio.rs` 现有 `AtomicU64` 主时钟结构。
+- **完成状态(2026-08-01) PASS**:播放以 2 秒窗口解码、4 窗口有界队列后台填充；cpal 回调只做非阻塞读取，underrun 输出静音且音频主时钟继续前进。seek 递增 generation、取消在途解码并丢弃旧块；pause 保留当前 generation 的下一块，resume 从同一音频时钟继续。停止会取消并回收解码、音频和协调线程。
+- **导出与另存 PASS**:视频导出逐窗口混音并把 PCM 直接追加到 encoder 私有文件 spool，完成时再 mux，不保留全时间线 `Vec`；音频片段另存 WAV 也逐窗口写文件。60 秒打包 GUI 时间线完成跨窗口播放、暂停/继续、首尾跳转后继续、完整 H.264/AAC 导出和 8 秒 WAV 另存。自动化覆盖长时间线恒定峰值分配、短参考一致性、取消、underrun、暂停不吞块及增量 spool。证据见 [`bounded-audio-streaming-real-device-2026-08-01.md`](../audit/2026-07-14/runtime-artifacts/automated/bounded-audio-streaming-real-device-2026-08-01.md)。
 
 ### 3.12 【P2】收尾杂项
 
 | 项 | 怎么写 |
 |---|---|
-| Lottie 接线(#34/#65) | `opentake-motion` 实现已在但 src-tauri 未依赖;评估 wgpu 直渲 vs 预烘焙 PNG 序列(后者先通:motion→PNG 序列→图片 clip) |
+| Lottie 接线(#34/#65) | 已完成：Velato/Vello 直渲共用于 preview/playback/export/Agent 源检查和时间线检查；无效文档及无 GPU 时 fail closed。 |
 | ffmpeg 随包(#131) | tauri sidecar 打包 ffmpeg/ffprobe,`OPENTAKE_FFMPEG` 已支持自定义路径,只差 bundle 配置 + 许可证说明(GPL 兼容) |
 | solo(#147) | `Clip.is_soloed` + 混音/合成时非 solo 轨静音/隐藏;前端轨头加 S 按钮 |
 | 布局常量(#148) | 对照上游 rulerHeight/dropZoneHeight/trackHeight 改 `theme.ts`,纯数值对齐 |
 | CSP 加固(#161) | null→非 null 白屏高风险,**必须真机逐项验证**,独立小 PR |
 | Storage/Models 设置页 | `SettingsView.tsx` 加两 pane:模型缓存管理(whisper/SigLIP 已下载模型列表+删除)、存储占用(项目/缓存目录大小) |
-| MCP 隐藏能力 | `InspectMedia` 已接 MediaBridge（剩 Lottie）；生成/超分四工具按凭据能力动态发布，Motion 两个兼容线名仍隐藏 |
+| MCP 动态能力 | `InspectMedia` 已接 MediaBridge，包含 Lottie 均匀抽帧；生成/超分按凭据动态发布；Motion add/edit 于 2026-08-01 接生产桥并按 Chromium/FFmpeg 能力动态发布 |
 | 技术债 | `fcpxml.rs` 1489 行拆分;`export_fcpxml` 名实不符(产物 XMEML)可改名 `export_xml`;`library.rs:322` remove 静默吞错补 `tracing::warn!` |
 
 ---
diff --git a/docs/architecture/MODULE-PORT-MAP.md b/docs/architecture/MODULE-PORT-MAP.md
index 58ae1809..634ba218 100644
--- a/docs/architecture/MODULE-PORT-MAP.md
+++ b/docs/architecture/MODULE-PORT-MAP.md
@@ -119,8 +119,9 @@
 - 工程缩略图生成:遍历时间线首个可用图片/视频片段,图片直接缩放,视频用 AVAssetImageGenerator 在 trimStartFrame 对应时间抽帧,JPEG 编码缓存
 - 素材恢复:打开工程时按 MediaManifest 把每个条目解析为 MediaAsset,触发波形/缩略图/元数据生成,统计 restored/missing
 - 最近工程注册表(ProjectRegistry):记录工程 URL/创建时间/最近打开时间,JSON 持久化到 ~/Documents/Palmier Pro/project-registry.json,支持注册/移除/删除到废纸篓/重命名后改 URL,带加载期间挂起变更队列
-- Home 主屏 UI:侧边栏(登录/新建/打开/设置)、工程卡片网格(缩略图/名称/相对时间/缺失态/删除确认/右键菜单)、示例工程横条、欢迎浮层、版本更新浮层
+- Home 主屏 UI:侧边栏(新建/打开/素材库/设置)、工程卡片网格(缩略图/名称/相对时间/缺失态/安全废纸篓确认/右键菜单)、示例工程横条，以及按 `__APP_VERSION__` 和本地 last-seen 版本驱动、可键盘关闭并持久化的首次欢迎/版本更新浮层
 - 示例工程服务(SampleProjectService):从 Convex HTTP 后端拉取示例列表并把单个示例「物化」成本地 .palmier 包(并发下载素材+对话,带进度回调,失败清理)
+- OpenTake 已在 `src-tauri/src/samples.rs` 接入同一 resolve 契约：所有远程路径与响应大小先校验，在同缓存卷的临时目录组装并用 `Project::open` 验证后原子发布，任一失败会删除完整暂存目录且保留旧缓存。未配置自定义后端时提供三个可离线打开的内置 `.opentake` 示例；示例缓存路径不会登记为用户最近项目，教程入口只在成功打开后进入编辑器并显示引导状态。
 - 工程设置不匹配对话框:导入视频片段时检测其 FPS/分辨率与时间线是否一致,提供「保持当前」或「改为匹配」(后者会按比例重算所有片段帧值)
 - 应用级工程编排(AppState):新建(NSSavePanel)、打开(NSOpenPanel/URL)、打开示例、Home/Editor 窗口切换、通知点击后定位生成资产
 
@@ -149,6 +150,7 @@
 - 【FPS 变更时的全片段帧重算(applyTimelineSettings 核心算法)】当新 fps≠旧 fps 且两者>0:scale = newFps/oldFps。currentFrame 与 sourcePlayheadFrame 各 ×scale 取整。对每条轨道按 startFrame 升序处理片段,维护 previousEnd:scaledStart=round(start×scale),scaledEnd=round(end×scale);新 startFrame=max(scaledStart, previousEnd ?? scaledStart)(防止重叠);durationFrames=max(1, scaledEnd−newStart);trimStart/trimEnd 各 round(×scale);关键帧 rescaleKeyframes(×scale)(每个 kf.frame=round(frame×scale) 后 upsert);fadeIn/fadeOut 各 round(×scale);再 clampKeyframesToDuration + clampFadesToDuration;更新 previousEnd=新 endFrame。这是有损但确定性的重采样,Rust 必须逐帧复刻取整与 max 防重叠逻辑。
 - 【分辨率变更时的自动适配】当 width/height 改变:对每个片段,若其 transform 恰好等于 fitTransform(asset, 旧 canvas)(即此前是自动适配的),则替换为 fitTransform(asset, 新 canvas);手动调过的 transform 保持不变。判定依据是 Transform 的 Equatable 全等。
 - 【设置不匹配判定 checkProjectSettings】传入待导入 assets:若没有 video 资产→proceed。若 timeline.settingsConfigured==false(史上第一个片段)→静默自动检测:fps=round(firstVideo.sourceFPS)、width/height=源宽高(缺则保持当前),applyTimelineSettings 后 proceed。若时间线非空→proceed(不打扰)。仅当「时间线为空但已配置过设置」时才比较:fpsMismatch = 源 fps 存在且≠时间线 fps;resMismatch = 源宽存在且≠时间线宽 或 源高存在且≠时间线高;有任一不匹配则返回 .mismatch(用源值,缺失项回退时间线值),由 UI 弹 ProjectSettingsMismatchView,用户选「改为匹配」则 applyTimelineSettings(源值)。这些都登记 undo(action name "Change Project Settings")。
+  - OpenTake 完成证据（2026-07-31）：`web/src/lib/projectSettings.ts#checkProjectSettings` 是上述四分支的单一判定边界；普通追加与定位拖放均在落片前调用该边界，首个视频通过可撤销的 `setTimelineSettings` 命令自动应用探测到的 `sourceFps`/尺寸，已配置空时间线的不匹配则由全局 `ProjectSettingsMismatchDialog` 显式保留或匹配。精确测试：`web/src/lib/projectSettings.test.ts#first_video_auto_configures_and_only_configured_empty_mismatch_prompts`、`web/src/store/editActions.test.ts#applies first-video settings before placing the first clip`、`web/src/store/editActions.test.ts#waits for configured-empty mismatch choice and preserves either decision`、`web/src/components/shell/ProjectSettingsMismatchDialog.test.tsx#renders an accessible mismatch and resolves match or keep choices`、`crates/opentake-ops/src/command.rs#set_timeline_settings_is_undoable`。
 - 【ProjectRegistry 持久化与并发】注册表 JSON 存到 ~/Documents/Palmier Pro/project-registry.json([ProjectEntry] 数组)。所有 URL 比较用 standardizedFileURL。register:已存在则更新 lastOpenedDate,否则追加新 UUID 条目。所有变更走 mutate(apply):若正在异步加载(isLoading)则把闭包加入 pendingMutations 队列延后执行,否则立即 apply 并 save。加载完成 finishLoading 后依次回放挂起变更再保存一次。delete 走后台 actor trashItem 到废纸篓成功后才从注册表移除。工程文件 URL 改名(VideoProject.fileURL setter)会调 updateURL 同步注册表并刷新 lastOpenedDate。
 - 【示例工程物化 SampleProjectService.materialize】GET base/v1/samples/resolve?slug=,返回 JSON 含 title/project/manifest/downloads[]/可选 chat[]/generationLog/posterUrl。downloads 每项{id,relativePath,url};chat 每项{name,url}转成 relativePath=chats/name。在 ~/Library/Application Support/PalmierPro/Samples/<safeSlug>/ 下建 <safeTitle>.palmier 包:写 project.json、media.json、(有则)generation-log.json,下载 posterUrl→thumbnail.jpg;用 withThrowingTaskGroup 并发下载所有 downloads(到 dest/relativePath,建父目录、覆盖旧文件),每完成一个回调进度 completed/total。任一步失败则删除整个 slug 目录并抛错。safeName:把 / : \ 替换为空格并 trim,空则用 "Sample"。Rust 复刻:HTTP 拉 JSON + 并发下载文件落盘组装目录。
 - 【新建工程流程 AppState.createNewProject】NSSavePanel(默认名 "Untitled Project",目录 ~/Documents/Palmier Pro,内容类型 io.palmier.project)→用户确认后 new VideoProject,设 fileURL/fileType,makeWindowControllers+showWindows,addDocument,save(.saveOperation) 落盘后 register 到注册表。打开:VideoProject(contentsOf:ofType:) 解码后同样建窗口并 register。
@@ -976,6 +978,8 @@
 - 【是否有回信邮箱 hasReplyEmail】若已登录(account.isSignedIn)则取决于 account.account?.user.email 是否非 nil;若未登录则取决于 trimmedEmail 非空。该值决定『允许回访』勾选框是否可用(disabled 当无邮箱),且无邮箱时即使勾选,提交时 mayContact 也被强制改为 false(submit 里 mayContact: hasReplyEmail ? mayContact : false)。
 - 【提交流程 submit()】guard canSubmit;清空 errorText;isSending=true;启动 @MainActor Task,defer 里复位 isSending;计算 attachedScreenshot = (includeScreenshot ? screenshot : nil)?.base64EncodedString()(即用户关掉开关就不带截图);await AccountService.shared.sendFeedback(message: trimmedMessage, email: trimmedEmail 为空则 nil, mayContact: 上述强制规则, screenshotPngBase64: attachedScreenshot, appVersion, osVersion);成功 didSend=true(切到致谢视图),失败把 error.localizedDescription 写入 errorText 显示为红字。
 - 【环境信息采集】appVersion = "{CFBundleShortVersionString} ({CFBundleVersion})"(任一缺失用 "?");osVersion = ProcessInfo.processInfo.operatingSystemVersion 拼成 "major.minor.patch"。这两个值随每次反馈一并上报。
+
+OpenTake 对应边界已落在 `src-tauri/src/feedback.rs`: `submit_feedback` 只通过类型化 `FeedbackSubmission` 发送，每次都从 Cargo 包版本/可选构建号和当前系统版本生成 `appVersion`/`osVersion`，缺失时显式回退为 `? (?)`/`?.?.?`。载荷采用白名单序列化，消息、邮箱和截图在 `Debug` 输出中脱敏；默认不联网，仅当运营方显式配置 `OPENTAKE_FEEDBACK_ENDPOINT` HTTPS 端点时才提交，客户端禁止重定向并设置 15 秒超时。
 - 【致谢文案分支 successDetailText】replyAddr = 登录邮箱 ?? (trimmedEmail 为空则 nil 否则 trimmedEmail);若 replyAddr 存在且 mayContact:『...may reach out at {replyAddr}』;若 replyAddr 存在但不允许:『...won't email you, as requested』;若无邮箱:『...Add an email next time...』。
 - 【主窗口截图算法 captureMainWindow(),需用 FFmpeg 体系外的方案复刻】候选窗口选择顺序:NSApp.keyWindow ?? NSApp.mainWindow ?? 第一个 (isVisible 且 title 不以 "Send feedback" 开头) 的窗口;取其 contentView;用 view.bitmapImageRepForCachingDisplay(in: bounds) + view.cacheDisplay(in:to:) 做离屏位图缓存;representation(using:.png) 得 PNG。关键时序:FeedbackWindowController.show() 必须在反馈窗口成为 key 之前先截图,否则会把反馈窗自身拍进去。
 - 【截图缩放规则 downscaledIfNeeded】maxDimension = 1920;若宽和高都 ≤1920 直接返回原 PNG;否则 scale = min(1920/width, 1920/height),newW=Int(width*scale)、newH=Int(height*scale);用 CGContext(8 位/分量, premultipliedLast, sRGB 或源色彩空间, interpolationQuality=.high)把 cgImage 重绘到新尺寸,再转回 PNG。任一步失败均回退返回原始 PNG(降级而非报错)。
@@ -1132,6 +1136,8 @@ MCPService 端口 19789 与工具注册属 Agent/MCP 子系统,App 层只做开
 
 **核心类型**:
 - `AppTheme` (enum) — 全局设计令牌根命名空间(纯静态、不可实例化)。内含嵌套枚举:Background/Border/BorderWidth/Accent/Glass/Status/Text/Opacity/TrackColor/Radius/Spacing/FontSize/FontWeight/Tracking/IconSize/ComponentSize/Window/Caption/GenerationPanel/MediaPanel/Anim,以及顶层 aiGradient/aiGradientDark 渐变与 ShadowStyle 结构和 Shadow 枚举。所有 UI 数值都必须从这里取(项目硬性规定),是整个前端的视觉单一真相源。
+
+OpenTake 的对应真相源是 `web/src/lib/theme.ts` + `web/src/styles/tokens.css`：前者供 Canvas/TypeScript 数值路径消费，后者是 DOM 投影。完整表契约测试锁定每项精确值，使用审计测试覆盖六个主界面并拒绝未定义 CSS 令牌。旧组件的语义别名只能通过 `var(...)` 指向规范令牌，不得重复声明颜色或时长字面量。
 - `AppTheme.Caption` (enum) — 字幕相关的约束常量(本目录唯一带编辑业务语义的部分):defaultFontSize=48、minFontSize=12、maxFontSize=300、minPosition=0、maxPosition=1、centerSnapValue=0.5、centerSnapThreshold=0.02、defaultCenterY=0.9、defaultCenter=(0.5,0.9)、minDisplayDuration=0.7。被 CaptionTab、ToolExecutor+Captions、EditorViewModel+Captions 消费,决定字幕默认样式、归一化坐标钳制与吸附、最短分句时长。
 - `AppTheme.ShadowStyle` (struct) — 阴影参数值类型(color/radius/x/y),配合 Shadow.sm/md/lg 预设与 View.shadow(_:) 扩展使用。
 - `CapsuleButtonStyle` (struct) — 实现 SwiftUI ButtonStyle 的胶囊按钮样式。含 Variant(secondary/prominent)与 Size(small/regular)枚举及可选 fill。内部私有 Chrome 视图持有 @State hovered,负责字号/内边距/前景背景色推导与悬停/按下交互态;通过 ButtonStyle 扩展暴露 .capsule 便捷构造器。
@@ -1247,7 +1253,9 @@ MCPService 端口 19789 与工具注册属 Agent/MCP 子系统,App 层只做开
 
 **闭源云**:不触达 Convex/Clerk/任何闭源生成式 AI 云。唯一的网络出口是第三方崩溃监控服务 Sentry(自托管或 sentry.io 均可,DSN 从 Info.plist 注入)。上报内容刻意脱敏:sendDefaultPii=false、enableCaptureFailedRequests=false,且产品文案明确声明"媒体与工程内容绝不收集",仅发送崩溃/错误/面包屑与脱敏后的 id(shortId 取前 8 位)。此为可选诊断遥测,与生成式 AI 业务云无关,且受用户开关控制(默认开启,可在隐私设置关闭后重启生效)。
 
-**移植策略**:逻辑本身简单可直接移植,但 Sentry Cocoa SDK 必须替换为 Rust 生态对应物。方案:在 Rust core 用官方 `sentry` crate(sentry-rust,支持 native 崩溃/panic 捕获、breadcrumb、scope、performance transaction,概念一一对应)。映射:SentrySDK.start→sentry::init(ClientOptions{ dsn, environment, traces_sample_rate:0.1, release:Some('palmier-pro@<ver>+<build>'.into()), send_default_pii:false, .. });breadcrumb→sentry::add_breadcrumb(Breadcrumb{ message, category, level, data });captureMessage/Error→sentry::capture_message / capture_error(或 anyhow/Error 经 sentry-anyhow);setExtra→sentry::configure_scope(|s| s.set_extra(...));logWarning/Error/Fault 的'warning 只进面包屑、error/fatal 才成事件并打 log_category tag' 这套分级语义需在 Rust 侧用同样的分支显式复刻;trace→sentry 的 start_transaction + finish(失败时 set status=internal_error)。isEnabled 三态默认(键缺省=开启)用 Tauri 的设置存储或自管 JSON/SQLite 复刻,键名沿用 'io.palmier.pro.telemetry.enabled' 或改 OpenTake 命名空间。appHangTimeoutInterval(8s 卡顿)、enableUncaughtNSExceptionReporting 这类 macOS 特有项无对应,可丢弃或用 sentry panic handler 近似。前端(React)若也要采集可用 @sentry/browser/@sentry/tauri,但核心崩溃上报建议放 Rust 端。隐私/合规:保留默认脱敏(不发 PII、不收媒体/工程内容)、保留用户可关开关、上报前对 id 做 shortId(前 8 char)截断。整体属诊断基础设施,非编辑算法,移植优先级低,可后置。
+**OpenTake 实现状态**:`src-tauri/src/telemetry.rs` 已接入固定版本的官方 Rust `sentry` SDK,并在 Tauri 启动入口最早阶段持有初始化 guard。只有显式提供有效 DSN 才会创建客户端:运行时按 `OPENTAKE_SENTRY_DSN`、`SENTRY_DSN` 顺序读取,未设置时才回退到构建期 `OPENTAKE_PACKAGED_SENTRY_DSN`;缺失、空白或无效 DSN 均不上报。运行时环境变量优先于打包值,便于受控 Beta 诊断且不会把 DSN 写入日志或 `Debug` 输出。初始化固定关闭默认 PII、失败请求体、结构化日志、指标与自动会话,仅保留 10% trace、panic 与 stacktrace;事件发送前移除 user/request/server/extra、源码上下文、局部变量、寄存器及绝对路径,并对消息、标签、异常、线程和 breadcrumb 中的路径、Bearer token 及 credential-shaped 值再次脱敏。媒体、工程内容和请求正文没有采集入口。无 DSN 是默认且完全离线的状态;启用遥测必须由受控打包配置或进程环境作出显式操作。
+
+**移植策略**:逻辑本身简单可直接移植,但 Sentry Cocoa SDK 必须替换为 Rust 生态对应物。OpenTake 已在 Rust core 使用官方 `sentry` crate 完成最小启动与隐私门控;后续若增加 breadcrumb/capture/trace 业务门面,应继续沿用同一模块及发送前脱敏边界。映射:SentrySDK.start→sentry::init(ClientOptions{ dsn, environment, traces_sample_rate:0.1, release, send_default_pii:false, .. });breadcrumb→sentry::add_breadcrumb;captureMessage/Error→sentry::capture_message / capture_error;setExtra→sentry::configure_scope;trace→Sentry transaction。用户可见的持久化启用开关与重启提示仍属于独立设置任务,不得通过把遥测改成默认开启来替代。appHangTimeoutInterval(8s 卡顿)等 Cocoa 专有项不直接移植,panic handler 仅作为近似。整体属诊断基础设施,非编辑算法。
 
 **关键文件**:Sources/PalmierPro/Telemetry/Telemetry.swift、Sources/PalmierPro/Utilities/Log.swift、Sources/PalmierPro/Settings/PrivacyPane.swift、Sources/PalmierPro/App/main.swift
 
diff --git a/docs/architecture/PLAYBACK-ENGINE.md b/docs/architecture/PLAYBACK-ENGINE.md
index 5f779cbc..d7ecc36d 100644
--- a/docs/architecture/PLAYBACK-ENGINE.md
+++ b/docs/architecture/PLAYBACK-ENGINE.md
@@ -1,6 +1,6 @@
 # Playback engine architecture
 
-> Current reviewed state: 2026-07-18. The original 2026-07-04 default-off
+> Current reviewed state: 2026-08-01. The original 2026-07-04 default-off
 > MJPEG design is historical; this document records the Wave 1A implementation.
 
 ## Capability route is the sole authority
@@ -115,6 +115,12 @@ the same project retain valid caches.
   54/570; playback integration 7/7; transport 6/6; workspace Rust passed.
   Workspace still reports seven deliberate ignored probes: one ffmpeg/ffprobe
   environment probe and six real-device probes (three export, three playback).
+- 2026-08-01 reconciliation: the four reviewed route/lifecycle owners passed
+  against the current code; Web passed 93 files/824 tests. The final packaged
+  macOS application exercised both a single-video WebKit project and a
+  text/color/multi-track Rust project, then switched back across the project
+  boundary without retaining the previous duration or playhead. Receipt:
+  [playback-route-lifecycle-real-device-2026-08-01.md](../audit/2026-07-14/runtime-artifacts/automated/playback-route-lifecycle-real-device-2026-08-01.md).
 
 Artifact hashes and the separation between older installed-app evidence and
 fresh detached bundles are recorded in
diff --git a/docs/architecture/PORT-1TO1-GAP.md b/docs/architecture/PORT-1TO1-GAP.md
index ad876f2f..a7608080 100644
--- a/docs/architecture/PORT-1TO1-GAP.md
+++ b/docs/architecture/PORT-1TO1-GAP.md
@@ -114,6 +114,10 @@
 | P2-11 | isDocumentEdited 脏标记前端反馈 | core 用 `version != last_saved_version` 派生 dirty 传前端,标题栏显示未保存态;驱动防抖保存与退出 flush | `session.rs:251` |
 | P2-12 | 两套窗口尺寸 | 单窗不强求双窗,可设 minWidth 760 避免主页空旷 | `tauri.conf.json:21-26` |
 
+P2-3 已由 `src-tauri/src/home.rs` 与 Home 卡片闭环：桌面端注册表以原子 JSON 持久化最近工程，启动同步只更新 `missing` 而不丢弃缺失条目；Reveal 和废纸篓命令只接受已注册的绝对 `.opentake` 路径。macOS 使用 `NSFileManager.trashItem`，Windows 使用系统回收站 API，Linux 使用 `gio trash`；仅在系统操作成功后才持久化移除。卡片提供缺失态、右键/按钮操作、从最近中移除、废纸篓二次确认、pending 与可重试错误状态。
+
+P1-1、P2-1 与 P2-2 已按独立所有者闭环：`useAutosave` 保持 1.5 秒防抖，原生 CloseRequested 在隐藏窗口前同步 flush；成功保存只刷新最近工程的 `modifiedAt`/`thumbnailPath`，不会改动表示打开排序的 `openedAt`。原生注册表从工程包持久化的 `project.json` 修改时间与 `thumbnail.jpg` 刷新元数据，Home 卡片显示 16:9 封面和本地化相对修改时间（路径仅作 tooltip），缺失工程保留最后元数据并停止加载封面。
+
 ---
 
 ## 二、实现批次顺序（每批一个功能分支：写 → 审 → 修 → CI 绿 → 合并）
@@ -175,6 +179,7 @@
 
 ### 批次 9 ｜ `feat/p2-samples-polish`（打磨）
 - P2-4 Sample 区、P2-12 窗口尺寸、剩余 P2 项。
+- **2026-08-01 代码门禁**:Sample 区已接入三个内置离线工程;物化成功、失败原子回滚、Home 路由成功/失败均有可执行测试。发布级 Web 门禁同时覆盖面板键盘聚焦、时间线 clip 的 24px 可访问代理、统一 `:focus-visible`、`prefers-reduced-motion` 与 `forced-colors`。打包桌面端的逐项视觉、键盘和核心编辑流证据仍必须在顺序 GUI 验证阶段留存后方可判定本批发布就绪。
 
 ---
 
diff --git a/docs/architecture/ROADMAP.md b/docs/architecture/ROADMAP.md
index 8f1e8503..895e2653 100644
--- a/docs/architecture/ROADMAP.md
+++ b/docs/architecture/ROADMAP.md
@@ -60,12 +60,12 @@
   3. 应用内 chat(reqwest→Anthropic SSE,BYOK;prompt caching)。
   4. **OpenTake 增强**:分层可组合系统提示词 + 模型策略配置化;高阶工具 `remove_filler_words`/`tighten_silences`;写工具返回结构化 JSON;新增 `get_capabilities`。
 - **验证**:`claude mcp add` 能连;每个工具走通;应用内 chat 能完成多步链式编辑;助手专属 undo 正确。
-- **进度**:`list_models` 与 `inspect_media` 已接生产桥。基础发现面为 38 个真实路径工具；存在托管或兼容 BYOK 凭据时动态增加 `generate_*`/`upscale_media` 四个工具，无凭据时保持隐藏；Motion 两个兼容线名仍未发布。生成与 Chat/MCP 复用同一 Dispatcher/GenerationBridge。
+- **进度**:`list_models`、媒体检查/转写与口播高阶工具已接生产桥。基础集合最多 39 个真实路径工具并按媒体桥能力过滤；存在托管或兼容 BYOK 凭据时动态增加 `generate_*`/`upscale_media` 四个工具，无凭据时保持隐藏；Motion 两个兼容线名仍未发布。生成与 Chat/MCP 复用同一 Dispatcher/GenerationBridge。
 
 ## Phase 8 — 文字/字幕渲染 + 转写 + 语义搜索
 - **做**:cosmic-text + tiny-skia/Vello 文字渲染(阴影/描边/背景/对齐/换行,逐帧 opacity)接入合成器;whisper-rs 转写(word/segment 时间戳,`TranscriptionResult` 模型复用);candle/ort 跑 SigLIP2 + tokenizers 做视觉/口语搜索。
 - **验证**:字幕静态渲染像素对齐上游;转写时间码映射正确;`search_media` 视觉/口语命中合理。
-- **进度**:SRT/VTT 字幕**导出纯逻辑**已落地(#110,`crates/opentake-domain/src/subtitle_export.rs`,按 `caption_group_id` 分组序列化,16 单测);剩接导出层 + `export_captions` agent 工具 + 前端导出对话框。
+- **进度**:SRT/VTT 字幕导出端到端已落地：`opentake-domain::subtitle_export` 按 `caption_group_id` 生成标准时码，Tauri `export_subtitles` 安全落盘，TitleBar 提供 SRT/VTT 原生保存入口；Rust 导出与前端菜单/交互路由均有测试。可选 Agent `export_captions` 工具不属于本 UI 导出验收项。
 - **进阶扩展(ADVANCED-FEATURES B/C/D 层)**:
   - AI 推理特性(统一 ort worker):超分(Real-ESRGAN/SeedVR)、AI 抠像(RVM/BiRefNet)、运动追踪(CoTracker)、防抖(FFmpeg vidstab 起步)、光流补帧(RIFE/FILM,p3)、消除瑕疵(p3)。
   - 音频工程(FFmpeg):响度统一(loudnorm/EBU R128)、降噪(afftdn/arnndn→DeepFilterNet)、人声分离(Demucs via ort)。
@@ -79,10 +79,11 @@
 - **进阶扩展 · AIGC 编排(ADVANCED-FEATURES E 层)**:智能剪口播(本地词级转写+静音检测→Rust 内算 ripple,高阶工具 `remove_filler_words`/`tighten_silences`)、图文成片(agent 编排既有工具+SigLIP2 选素材)、音色克隆(ElevenLabs 等)、虚拟数字人(HeyGen/fal,新增 catalog kind)、多语种字幕翻译(MT/LLM,保时码)。
 
 ## Phase 10 —(新)Motion Canvas 动效 / AI Video 插件
-对应 `plugins/motion-canvas-studio`(待新增)+ `opentake-motion` fallback。详见 [MOTION-GRAPHICS-PLUGIN.md](../modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md)。
+对应 `plugins/motion-canvas-studio` + `opentake-motion` fallback。详见 [MOTION-GRAPHICS-PLUGIN.md](../modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md)。
 - **做**:沿 issue #34,优先 fork / vendor Motion Canvas(MIT),作为独立 Motion / AI Video 插件。Agent 或 Motion Panel 生成 Motion Canvas scene/template → 插件渲染 `output.mp4` → OpenTake probe 并导入 media manifest → 单步落轨。`crates/opentake-motion` 现有 scaffold 保留为后续 PNG sequence / transparent alpha / HTML-CSS fallback,不再作为 v1 主渲染器 blocker。
 - **验证**:Motion Canvas sample template 能生成 mp4;OpenTake 自动导入并创建 timeline clip;`composite_frame` 和 `export_video` 都包含该片段;失败不污染 manifest/timeline;README/NOTICE 保留 Motion Canvas MIT license 与修改说明。
 - **时机**:v1 可复用普通视频导入/预览/导出链路,不阻塞 native alpha overlay。透明动效与 `ClipType::Motion`/frame sequence 放后续。
+- **进度(2026-08-01)**:Beta v1 竖切已完成。固定 `title-card` 使用锁定的 Motion Canvas 3.17.2 官方 `Renderer.renderFrame`，离线 Chromium 逐帧后由随包 FFmpeg 生成 `output.mp4`；Motion Panel、Agent add/edit、进度/取消、结果元数据校验、项目能力约束、单事务导入/落轨/替换/撤销/保存重开均已接通。自动化已验证重复构建与重复渲染确定性、异常/遍历/符号链接无污染，以及生成片段真实进入 `composite_frame` 和 `export_video`。透明输出、任意 TSX 和 frame-sequence 仍明确属于后续版本。
 
 ---
 
diff --git a/docs/architecture/STEM-SEPARATION.md b/docs/architecture/STEM-SEPARATION.md
new file mode 100644
index 00000000..f8a655b5
--- /dev/null
+++ b/docs/architecture/STEM-SEPARATION.md
@@ -0,0 +1,28 @@
+# Stem separation execution boundaries
+
+OpenTake currently exposes two explicit execution choices. Only the local path is executable in this release; the hosted path is intentionally fail-closed.
+
+## Local execution
+
+`opentake-center-v1` is a bundled, inspectable DSP profile, not a neural semantic-separation model. On first use OpenTake atomically installs the 104-byte profile under the application model directory and verifies SHA-256 `9c72ab220f370000a702fc11c8071905648a56d1102d9519659a6062abb4b376`. An existing file with a different digest is rejected rather than silently replaced.
+
+The processor decodes the source to stereo 48 kHz PCM and derives centre `(L + R) / 2` and side `(L - R) / 2` signals. Vocals and accompaniment are published as stereo dual-mono WAV assets so each remains audible in the current mono export mixdown. This works well when voice/dialogue is centred and the desired accompaniment has stereo side information. It does not promise semantic separation of centred instruments, reverb, or mono material and must not be described as Demucs/MDX-equivalent.
+
+Local processing is offline. Source media is hashed but never modified or uploaded. Both result files are published and imported atomically, and each media entry records the source asset id, source SHA-256, execution id, model SHA-256, and stem kind.
+
+## Hosted execution
+
+Hosted selection requires all of the following before routing can be considered:
+
+- an explicit provider;
+- a provider-qualified model whose prefix matches that provider;
+- explicit confirmation that the source audio may be uploaded;
+- a configured provider adapter.
+
+The desktop application currently has no stem-separation transport adapter. It rejects incomplete consent/configuration and performs no upload. Adding a hosted adapter later must reuse the provider registry and derived-media provenance path rather than placing credentials, signed URLs, or provider diagnostics in the project.
+
+## Job and failure semantics
+
+The Tauri owner allows one active separation job, emits source-scoped progress, and exposes cancellation. Output is written into a unique project `media/stems-<uuid>` directory via partial files and atomic renames. Cancellation, processing failure, output-probe failure, or import failure removes the job directory. The two derived assets enter the shared media manifest in one persisted batch so a project cannot retain only one side of a successful operation.
+
+The Inspector identifies the local privacy boundary, the hosted upload boundary, active progress, cancellation, typed failures, and the ids/provenance of successful outputs. Derived assets use the same preview, timeline, playback, save/reopen, and export paths as ordinary imported audio.
diff --git a/docs/architecture/editing-automation/EDITING-AUTOMATION-DOS.md b/docs/architecture/editing-automation/EDITING-AUTOMATION-DOS.md
index d7db106d..87c206ef 100644
--- a/docs/architecture/editing-automation/EDITING-AUTOMATION-DOS.md
+++ b/docs/architecture/editing-automation/EDITING-AUTOMATION-DOS.md
@@ -42,7 +42,7 @@ The v1 editing automation set is:
 - `detect_beats`: read audio PCM and return beat/onset candidates without changing the timeline.
 - `auto_cut_to_beats`: align selected clips or media ranges to beat candidates through existing edit commands.
 - `tighten_silences`: find low-energy gaps and produce ripple delete ranges.
-- `remove_filler_words`: disabled until timeline transcript tooling is truly wired; it depends on word-level transcript frames.
+- `remove_filler_words`: uses the live timeline transcript bridge to return reviewable word-aligned filler cuts and exact `ripple_delete_ranges` commands; it is discovered only when that bridge is present.
 
 ## Scope Boundaries
 
@@ -52,14 +52,16 @@ Automatic music beat sync v1 uses PCM energy/onset detection. It must not add he
 
 Agent tools may suggest edits without applying them. A write path must apply via `EditCommand` only.
 
-Current MCP status: `detect_beats`, `auto_cut_to_beats`, and `tighten_silences` are typed tools backed by `CoreHandle::extract_analysis_pcm`, so they can produce PCM-based frame hints and candidate edit commands without mutating the timeline. `smart_reframe` is still a typed preflight surface that returns a vision-backend diagnostic until sampled-frame/saliency access is exposed. `remove_filler_words` remains disabled until transcript access is truly wired.
+Current MCP status: `detect_beats`, `auto_cut_to_beats`, and `tighten_silences` are typed tools backed by `CoreHandle::extract_analysis_pcm`. Beat detection and silence tightening are read-only; `auto_cut_to_beats` defaults to a read-only proposal and, only with `write=true`, aligns selected visual clips plus linked A/V partners through one atomic `MoveClips` command. `remove_filler_words` is backed by word-level project-frame transcripts, supports configurable multi-word lexicons, and returns per-cut review data plus undoable ripple commands without mutating the timeline. `smart_reframe` is still a typed preflight surface that returns a vision-backend diagnostic until sampled-frame/saliency access is exposed.
+
+Completion evidence (2026-07-31): `crates/opentake-agent/tests/editing_automation_acceptance.rs#automation_children_are_atomic_reviewable_and_command_routed` executes the shared contract across deterministic beat and autocrop analysis, MCP beat/silence preview payloads, the typed unavailable smart-reframe boundary, one-command smart-reframe and beat-placement plans, rejection with zero mutation, and exact single-undo restoration. The seven source-bound owners in `tools/completion-tests/doc-*.test.mjs` delegate to that exact integration owner and reject a zero-test Cargo filter.
 
 ## Failure Semantics
 
 - No media decode: return a structured diagnostic and no edit.
 - Ambiguous short IDs: fail before typed args or command creation.
 - Analysis confidence below threshold: return suggestions, not writes.
-- Transcript unavailable: `remove_filler_words` remains unavailable; `tighten_silences` can still use PCM energy.
+- Transcript bridge unavailable: `remove_filler_words` is absent from discovery and direct calls fail closed as not advertised; `tighten_silences` can still use PCM energy.
 - `ripple_delete_ranges` accepts exactly one of `trackIndex` or `clipId`. `units="frames"` is the default; `units="seconds"` is valid only with `clipId` and is converted through the timeline fps plus the clip's source-frame trim/speed mapping before producing half-open project-frame ranges.
 - `add_clips` with omitted `trackIndex` must route through one atomic auto-track `EditCommand`; track creation and clip placement must undo together.
 - `swapMedia` consumes only `clipId` + `mediaRef`. Frontend types and wrappers must not expose duration/type/trim options unless the backend starts consuming them.
diff --git a/docs/architecture/editing-automation/EDITING-AUTOMATION/acceptance-tests.md b/docs/architecture/editing-automation/EDITING-AUTOMATION/acceptance-tests.md
index caff2b09..6af64287 100644
--- a/docs/architecture/editing-automation/EDITING-AUTOMATION/acceptance-tests.md
+++ b/docs/architecture/editing-automation/EDITING-AUTOMATION/acceptance-tests.md
@@ -46,13 +46,15 @@ Parent contract: [Editing Automation DOS](../EDITING-AUTOMATION-DOS.md). Source
 ## Agent / Workflow Checks
 
 - `detect_beats`, `auto_cut_to_beats`, `smart_reframe`, and `tighten_silences` are visible in tool metadata when implemented.
-- `remove_filler_words` reports unavailable until word-level transcript is wired to timeline frames.
+- `remove_filler_words` is advertised only with the transcript bridge; it returns word-aligned review cuts and direct dispatch fails closed when the bridge is absent.
 - Active workflow plugin roles affect tool target selection.
 - Plugin rules appear in `context_signal` warnings without suppressing built-in warnings.
 - Agent `ripple_delete_ranges` rejects calls that pass both `trackIndex` and `clipId`, accepts `clipId + units=seconds`, and emits half-open project-frame ranges after fps/source-trim conversion.
 - Agent `add_clips` with omitted `trackIndex` creates shared auto tracks and clips in one undoable transaction; one `undo` removes both clips and auto-created tracks.
-- PCM-backed MCP tools return deterministic preview data: `detect_beats` returns beat frame hints, `auto_cut_to_beats` returns beat/cut/placement suggestions, and `tighten_silences` returns `ripple_delete_ranges` candidate commands without mutating the timeline. `smart_reframe` still returns a deterministic vision-backend diagnostic until sampled-frame analysis is wired.
+- PCM-backed MCP tools return deterministic preview data: `detect_beats` returns beat frame hints, `auto_cut_to_beats(write=false)` returns beat/cut/placement suggestions, and `tighten_silences` returns `ripple_delete_ranges` candidate commands without mutating the timeline. `auto_cut_to_beats(write=true)` applies selected visual placements and linked A/V partners through exactly one `MoveClips` command. `smart_reframe` still returns a deterministic vision-backend diagnostic until sampled-frame analysis is wired.
 
 ## Minimum Local Verification
 
 Run a local Markdown link existence check over `docs/DOS/**/*.md`. This does not prove implementation behavior, but it prevents stale cross-document references in the DOS set.
+
+Current verification (2026-07-31): the source-bound completion owners for Documentation Checks, Shared Implementation Checks, Beat Sync Checks, and Minimum Local Verification all execute `crates/opentake-agent/tests/editing_automation_acceptance.rs#automation_children_are_atomic_reviewable_and_command_routed`. That integration test covers deterministic media analysis, review-only MCP results, typed failure with zero mutation, single-command plans, linked-A/V intent flags, command-bound mutation, and exact undo restoration. A local relative-link check over this file and its parent DOS passed with no unresolved targets.
diff --git a/docs/architecture/editing-automation/EDITING-AUTOMATION/agent-editing-suggestions.md b/docs/architecture/editing-automation/EDITING-AUTOMATION/agent-editing-suggestions.md
index 2beb75bc..f0a5bffe 100644
--- a/docs/architecture/editing-automation/EDITING-AUTOMATION/agent-editing-suggestions.md
+++ b/docs/architecture/editing-automation/EDITING-AUTOMATION/agent-editing-suggestions.md
@@ -23,9 +23,9 @@ V1 automation tools:
 - `smart_reframe`: proposal or write mode, applies crop/transform commands.
 - `tighten_silences`: detects low-energy PCM ranges and maps them to `RippleDeleteRanges`.
 
-Deferred:
+Transcript-backed:
 
-- `remove_filler_words`: depends on word-level `get_transcript` being truly wired through timeline frames. Until then, it must report unavailable rather than guessing from captions or segments.
+- `remove_filler_words`: reads word-level `get_transcript` project frames, matches a configurable multi-word lexicon, and returns reviewable cuts plus `ripple_delete_ranges` commands. It is fail-closed and undiscoverable without the transcript bridge.
 
 ## Suggestion Shape
 
@@ -62,7 +62,7 @@ Workflow plugin rules are additive. Built-in signal rules still apply.
 
 ## Current Tool Availability
 
-The analysis-driven tool names are intentionally visible in MCP. `detect_beats`, `auto_cut_to_beats`, and `tighten_silences` validate args and use PCM analysis through the `CoreHandle` boundary to return preview data or candidate edit commands. `smart_reframe` validates args but still returns a vision-backend diagnostic until sampled-frame/saliency access is available.
+The analysis-driven tool names are capability-gated in MCP. `detect_beats`, `auto_cut_to_beats`, and `tighten_silences` validate args and use PCM analysis through the `CoreHandle` boundary to return preview data or candidate edit commands. `remove_filler_words` appears only with a live media/transcript bridge. `smart_reframe` validates args but still returns a vision-backend diagnostic until sampled-frame/saliency access is available.
 
 ## Acceptance Hooks
 
@@ -72,4 +72,4 @@ See [acceptance tests](acceptance-tests.md). Required checks:
 - `write=false` never calls `CoreHandle::apply()`;
 - successful writes return shortened IDs;
 - `context_signal` survives both success and no-op proposal paths;
-- `remove_filler_words` is unavailable until transcript is wired.
+- `remove_filler_words` returns stable, word-aligned review cuts; applying only accepted ranges leaves rejected words untouched and one undo restores the exact prior timeline.
diff --git a/docs/architecture/editing-automation/EDITING-AUTOMATION/beat-sync-auto-cut.md b/docs/architecture/editing-automation/EDITING-AUTOMATION/beat-sync-auto-cut.md
index c0837d6d..727a8cf5 100644
--- a/docs/architecture/editing-automation/EDITING-AUTOMATION/beat-sync-auto-cut.md
+++ b/docs/architecture/editing-automation/EDITING-AUTOMATION/beat-sync-auto-cut.md
@@ -57,6 +57,15 @@ No FFT is required for v1. If a future version adds spectral flux, it must be do
 - trim clip boundaries to nearest beat when within a small tolerance;
 - return a proposal when confidence is low.
 
+Implemented v1 write boundary: `write` defaults to `false`. The preview payload
+contains deterministic `cutFrames` and `placements` and performs no edit. With
+`write=true`, every requested visual root is aligned to a detected beat; each
+linked A/V partner is expanded with the same frame delta and the complete move
+set is applied once as `EditCommand::MoveClips`. Missing/nonvisual clips,
+insufficient beats, and negative linked placements are rejected before the
+command boundary. The BGM analysis source is never included in the move set
+unless it is itself an explicitly linked partner of a selected visual clip.
+
 It must apply edits only through the shared path:
 
 `TimelineContainer/Inspector/Toolbar` -> `web/src/store/editActions.ts` -> `web/src/lib/api.ts editApply()` -> `src-tauri/src/commands.rs edit_apply` -> `AppCore::apply()` -> `opentake-ops::EditCommand` -> `ops/*` -> `timeline_changed` -> `sync.ts`.
@@ -81,3 +90,19 @@ See [acceptance tests](acceptance-tests.md). Minimum cases:
 - Low-energy speech track is not over-detected as montage beats.
 - `auto_cut_to_beats(write=false)` emits no `timeline_changed`.
 - Linked visual/audio pairs stay in the same `linkGroupId` alignment after auto cut.
+
+Completion evidence (2026-07-31):
+
+- `crates/opentake-media/src/analysis/beat.rs#pulse_audio_detects_beat_frame_with_strength`
+  verifies a real normalized pulse, while
+  `#low_energy_speech_is_not_overdetected` verifies the absolute energy floor.
+- `crates/opentake-agent/src/mcp/dispatch.rs#auto_cut_to_beats_write_false_is_read_only`
+  proves preview mode emits no command or timeline change.
+- `crates/opentake-agent/src/mcp/dispatch.rs#auto_cut_to_beats_write_true_is_one_atomic_command_and_preserves_links`
+  proves a rejected request is a no-op and a valid request emits exactly one
+  `MoveClips` command while retaining linked A/V identity and alignment.
+- `web/src/store/editActions.test.ts#accepts one atomic request and refuses a multi-command pseudo-transaction`
+  prevents the frontend automation adapter from representing several IPC edits
+  as one transaction.
+- The five source-bound `tools/completion-tests/doc-*.test.mjs` owners execute
+  these focused boundaries and reject zero-test filters.
diff --git a/docs/architecture/editing-automation/EDITING-AUTOMATION/workflow-plugin-recipes.md b/docs/architecture/editing-automation/EDITING-AUTOMATION/workflow-plugin-recipes.md
index 285b91c6..48b736f8 100644
--- a/docs/architecture/editing-automation/EDITING-AUTOMATION/workflow-plugin-recipes.md
+++ b/docs/architecture/editing-automation/EDITING-AUTOMATION/workflow-plugin-recipes.md
@@ -33,7 +33,7 @@ Stages:
 
 1. `get_transcript` when available.
 2. `tighten_silences` on the `VoiceOver` track.
-3. `remove_filler_words` only after transcript is truly wired.
+3. `remove_filler_words` when capability discovery exposes it; review word-aligned cuts before applying accepted ripple ranges.
 4. `smart_reframe` for vertical repurposing if target aspect differs.
 
 Rules:
diff --git a/docs/audit/2026-07-14/beta-1-convergence-2026-08-01.md b/docs/audit/2026-07-14/beta-1-convergence-2026-08-01.md
new file mode 100644
index 00000000..032d1841
--- /dev/null
+++ b/docs/audit/2026-07-14/beta-1-convergence-2026-08-01.md
@@ -0,0 +1,56 @@
+# Beta 1 目标与规划对账 — 2026-08-01
+
+## 对账范围
+
+已检查根目录 README/CHANGELOG、`docs/architecture` 路线与差距文档、
+`docs/audit/2026-07-14/implementation-plans` 的十组生成计划、
+`docs/superpowers/plans` / `.superpowers/sdd` 的执行报告，以及所有 2026-07-29 至
+2026-08-01 的自动化与实机证据。
+
+2026-07-14 的 completion ledger 是审计基线，不是随每个后续实现提交自动回填的动态状态。
+它仍保留大量 `incomplete` 与未勾选步骤，即使对应代码、测试和运行证据后来已经落地。
+因此本次不改写用户正在生成/维护的四个受保护台账文件，而以提交历史、现行代码测试和
+日期更晚的 runtime artifact 作当前裁决。
+
+## Beta 代码状态
+
+首个 Beta 范围内已经没有已知的“只有规划、没有生产入口”的代码项。最后一个确定缺口
+`requirement-fdd45062091b48f3`（运动追踪）已在 `73a245c` 补齐：Tauri 命令、Inspector、
+主预览拖框、帧范围、取消/重试、置信度/关键帧审阅、Apply、Undo、保存重开与 H.264 导出。
+
+其余近期高级竖切均已有生产入口和自动化证据：
+
+- RVM 抠像、智能擦除、参考色彩匹配；
+- 声部分离、响度、降噪；
+- 口播清理、字幕翻译、图文成片；
+- Motion Canvas、原生 Chromium fallback、Lottie；
+- 数字人和音色克隆的 provider、同意、成本、取消、原子导入与撤销边界；
+- HDR/代理/账号、保存重开、预览/播放/导出、数据安全与跨平台打包契约。
+
+## 候选包仍需顺序验证
+
+以下不是代码 TODO，而是必须在同一个 `1.0.0-beta.1` 候选包上完成的发布证据：
+
+1. 按 `docs/releases/1.0.0-beta.1.md` 的 11 个顺序阶段执行 macOS GUI 验收。
+2. 对抠像、擦除、色彩匹配、运动追踪、声部分离和 Motion 结果做保存重开与最终导出检查。
+3. 验证 Agent、生成、数字人、音色克隆在无凭据时明确拒绝，不发生付费请求或部分导入。
+4. 构建 Apple Silicon `.app` / `.dmg`，记录 SHA-256、签名状态与 Gatekeeper 结果。
+5. 把候选提交推送到远端，并运行 exact-SHA CI；Windows 安装器由该工作流生成。
+
+## 外部条件（不允许伪造）
+
+- 当前没有 fal、ElevenLabs、OpenAI 或 Anthropic key，不能执行真实付费 provider 请求或
+  Agent 云模型对话。确定性 fixture 覆盖代码契约；GUI 只验证无凭据、同意、成本、取消和
+  错误可见性。真实付费冒烟必须由用户提供 key 并明确授权费用后另行执行。
+- 钥匙串只有 Apple Development 身份，没有 Developer ID Application 与公证凭据。
+  本地 Beta 可用，但不是面向陌生用户的已公证分发包。
+- 当前主机是 macOS，不能伪造 Windows WebView 人工交互。Windows 编译、安装器、sidecar、
+  safe-fs 由 GitHub exact-SHA 原生 runner 验证；人工 UI 烟测需 Windows 交互环境。
+- Unix 生产原子目录创建因缺少可移植“mkdir 并返回所创建对象 fd”原语而严格拒绝；这是
+  安全架构裁决，不是可通过普通补丁消除的测试失败。
+
+## Beta 后续路线（不在本次发布门禁）
+
+Bezier/Spring、RGB 曲线、更多双源转场、本地神经超分、神经语义分轨、曲线变速、
+多机位对齐、任意 Motion Canvas TSX/透明序列均保留在后续 Beta。当前产品不展示虚假可用
+控件；这些未来目标不会阻止首个本地可用 Beta，但也不会被计为已经完成。
diff --git a/docs/audit/2026-07-14/implementation-plans/accessibility-polish-implementation.md b/docs/audit/2026-07-14/implementation-plans/accessibility-polish-implementation.md
index 7e7413c3..31f42d1d 100644
--- a/docs/audit/2026-07-14/implementation-plans/accessibility-polish-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/accessibility-polish-implementation.md
@@ -32,34 +32,44 @@
   - Add token, semantic-role, keyboard-focus, state, privacy, and visual assertions for every named surface; the affected lint, typecheck, and web suites must pass.
   - Exercise the named surface with keyboard and browser or packaged-app visual inspection, and retain exact accessibility or screenshot evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/tests/feedback.rs#submission_includes_app_and_os_version` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri --test feedback submission_includes_app_and_os_version -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/feedback.rs#submit_feedback`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri --test feedback submission_includes_app_and_os_version -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Completed 2026-08-01. The owning integration test was observed RED before the
+  module existed, then GREEN after the typed submission boundary was registered.
+  It covers package/build and OS metadata, missing-version fallbacks, camel-case
+  serialization, no-email contact suppression, and debug redaction. The runtime
+  remains offline unless an HTTPS endpoint is explicitly configured; redirects
+  are disabled and requests have a 15-second timeout. The formatting check and
+  `cargo test --workspace --no-fail-fast` pass. This metadata slice
+  has no user-visible surface; the disabled Beta feedback menu is not claimed as
+  an implemented feedback form by this task.
+
 ### Task 2: centralized-design-token-table + AP-design-token-consistency (implementation-slice-d434285f35d42846)
 
 **Covered records:**
@@ -331,7 +341,7 @@
   - Add token, semantic-role, keyboard-focus, state, privacy, and visual assertions for every named surface; the affected lint, typecheck, and web suites must pass.
   - Exercise the named surface with keyboard and browser or packaged-app visual inspection, and retain exact accessibility or screenshot evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/preview/TransformOverlay.test.tsx#renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/components/shell/TitleBar.visual.test.ts#TitleBar alignment` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -340,7 +350,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong"`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "TitleBar alignment"`
@@ -349,11 +359,11 @@
 
   Expected: FAIL because one or more of the 17 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/ui/PanelShell.tsx#PanelShell`, `web/src/lib/theme.ts#ACCENT`, `web/src/lib/theme.ts#BG`, `web/src/lib/theme.ts#BORDER`, `web/src/lib/theme.ts#FS`, `web/src/lib/theme.ts#LAYOUT`, `web/src/lib/theme.ts#RADIUS`, `web/src/lib/theme.ts#SPACE`, `web/src/lib/theme.ts#TEXT`, `web/src/lib/theme.ts#TRACK_COLOR`, `web/src/styles/tokens.css`, `web/src/styles/tokens.css#--bg-raised`, `docs/architecture/MODULE-PORT-MAP.md`, `docs/modules/web/SPEC.md`, `docs/specs/frontend/1-design-tokens.md`, `docs/specs/frontend/13-implementation.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong"`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "TitleBar alignment"`
@@ -362,12 +372,25 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Code acceptance completed 2026-08-01. Both reviewed-planned owners were
+  observed RED, then all four focused runners passed (17 assertions). The full
+  Web gate passes with 97 files / 834 tests and a production build; only the
+  pre-existing dynamic-import and chunk-size advisories remain. The typed table
+  now covers every documented token and local dimension, the CSS projection has
+  no undefined production references, and captions/keyframe UI consume their
+  typed local constants. Keyframe rows were corrected from 24px to the specified
+  22px.
+
+- [ ] **Runtime evidence gate:** inspect the packaged editor at the pinned
+  viewport/scale/locale and retain the six-surface Shell/Toolbar/Media/Inspector/
+  Preview/Timeline token-parity evidence during the sequential GUI phase.
+
 ### Task 3: dsn-gated-telemetry-init (implementation-slice-6fd8dbcff3a60a4b)
 
 **Covered records:**
@@ -390,34 +413,41 @@
   - Add token, semantic-role, keyboard-focus, state, privacy, and visual assertions for every named surface; the affected lint, typecheck, and web suites must pass.
   - Exercise the named surface with keyboard and browser or packaged-app visual inspection, and retain exact accessibility or screenshot evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/tests/telemetry_init.rs#starts_only_with_explicit_packaged_or_environment_dsn` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri --test telemetry_init starts_only_with_explicit_packaged_or_environment_dsn -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/telemetry.rs#init_telemetry`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri --test telemetry_init starts_only_with_explicit_packaged_or_environment_dsn -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the reviewed test first failed while the telemetry owner
+  was absent, then passed after the DSN gate and scrubber were integrated. The
+  exact owner, telemetry unit test, `cargo fmt --all -- --check`, and
+  `CARGO_INCREMENTAL=0 cargo test --workspace --no-fail-fast` all passed. The
+  workspace gate reported only the existing explicitly ignored real-device
+  probes.
+
 ### Task 4: release-accessibility-visual-parity (implementation-slice-75d12e695c4bc7e4)
 
 **Covered records:**
@@ -442,34 +472,48 @@
   - Validate sample-project load and core edit flows.
   - Run visual and accessibility regression checks on packaged desktop builds.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/releaseParity.test.tsx#sample_projects_accessibility_visual_and_interaction_gate` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/releaseParity.test.tsx -t "sample_projects_accessibility_visual_and_interaction_gate"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/ui/PanelShell.tsx#PanelShell`, `web/src/components/timeline/TimelineContainer.tsx#accessibleClipRects`, `web/src/styles/global.css`, `docs/architecture/PORT-1TO1-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/releaseParity.test.tsx -t "sample_projects_accessibility_visual_and_interaction_gate"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the focused release owner failed first because panel
+  regions were not keyboard-focusable. It passed after keyboard panel focus and
+  global focus-visible, reduced-motion, and forced-colors behavior were added.
+  The release owner also binds the existing executable sample materialization,
+  rollback, Home routing, and 24px timeline clip-access contracts. The full Web
+  gate passed with 98 files / 835 tests and the production build passed; only
+  the existing dynamic-import and chunk-size advisories remained.
+
+- [ ] **Runtime evidence gate:** on the packaged desktop build, open an offline
+  sample, perform the core edit flow, traverse panel and timeline controls by
+  keyboard, inspect focus/hover/high-contrast/reduced-motion presentation, and
+  retain screenshots plus the exact interaction result before release-ready
+  reclassification.
+
 ### Task 5: AP-keyboard-shortcut-matrix + complete-shortcut-table (implementation-slice-c9e6c68dcdf6b5bb)
 
 **Covered records:**
@@ -525,7 +569,7 @@
   - Conflicting or disabled shortcuts must not mutate state; repeat behavior and undo grouping must match the specified command.
   - Table-drive all shortcut rows across editor focus, text input, modal, locked selection, playback, and no-project states.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/hooks/useKeyboardShortcuts.matrix.test.ts#all_shortcuts_conflicts_editable_suppression_and_platform_modifiers` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `web/src/hooks/useKeyboardShortcuts.test.ts#complete_documented_shortcut_table` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
@@ -536,7 +580,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/hooks/useKeyboardShortcuts.matrix.test.ts -t "all_shortcuts_conflicts_editable_suppression_and_platform_modifiers"`
   - Run: `pnpm -C web test -- --run src/hooks/useKeyboardShortcuts.test.ts -t "complete_documented_shortcut_table"`
@@ -547,11 +591,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/App.tsx#App`, `web/src/hooks/useKeyboardShortcuts.ts#handleProjectSaveKeyDown`, `web/src/hooks/useKeyboardShortcuts.ts#handleTransportSpaceKeyDown`, `web/src/hooks/useKeyboardShortcuts.ts#useKeyboardShortcuts`, `web/src/store/editActions.ts#splitAtPlayhead`, `docs/modules/web/SPEC.md`, `docs/specs/frontend/13-implementation.md`, `docs/specs/frontend/9-interactions.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/hooks/useKeyboardShortcuts.matrix.test.ts -t "all_shortcuts_conflicts_editable_suppression_and_platform_modifiers"`
   - Run: `pnpm -C web test -- --run src/hooks/useKeyboardShortcuts.test.ts -t "complete_documented_shortcut_table"`
@@ -562,12 +606,24 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: both reviewed owners first failed because the complete
+  resolver/table did not exist. They passed after one physical-key resolver was
+  integrated with the hook and native-menu semantic command boundary. All six
+  named existing/focused owners passed; the full Web gate passed with 99 files /
+  837 tests and the production build passed, with only the existing dynamic-
+  import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** exercise every §9.6 row in the packaged desktop
+  app on the macOS accelerator path, including input focus, modal, repeat,
+  disabled/read-only and no-project states; retain the exact command/result and
+  visible-state evidence before final parity reclassification.
+
 ### Task 6: AP-hover-focus-cursor-matrix + complete-hover-cursor-table (implementation-slice-7dce3a0f53283ac9)
 
 **Covered records:**
@@ -626,7 +682,7 @@
   - Focus order and restoration must remain deterministic across panels, menus, dialogs, project switches, and hidden/maximized panels.
   - Run keyboard-only focus traversal plus pointer-state visual snapshots at default and high-contrast themes, with no focus traps or unlabeled controls.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/preview/TransformOverlay.test.tsx#TransformOverlay` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/components/preview/TransformOverlay.test.tsx#renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -636,7 +692,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "TransformOverlay"`
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong"`
@@ -646,11 +702,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/ScrubbableNumberField.tsx#ScrubbableNumberField`, `web/src/components/preview/CropOverlay.tsx#CropOverlay`, `web/src/components/preview/TransformOverlay.tsx#CORNER_CURSOR`, `web/src/components/preview/TransformOverlay.tsx#TransformOverlay`, `web/src/components/shell/SplitPane.tsx#SplitPane`, `web/src/components/timeline/TimelineContainer.tsx#TimelineContainer`, `web/src/components/timeline/TimelineContainer.tsx#toolMode`, `web/src/components/ui/HoverButton.tsx#HoverButton`, `web/src/styles/global.css`, `docs/modules/web/SPEC.md`, `docs/specs/frontend/13-implementation.md`, `docs/specs/frontend/9-interactions.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "TransformOverlay"`
   - Run: `pnpm -C web test -- --run src/components/preview/TransformOverlay.test.tsx -t "renders 4 corner handles at the OpenTake spacing/opacity tokens matching upstream AppTheme.Spacing.smMd / Opacity.strong"`
@@ -660,12 +716,24 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the two reviewed matrix owners first failed because the
+  shared timeline cursor projection and interaction-state attributes did not
+  exist. All five named focused owners passed after the cursor/focus/disabled
+  boundary was integrated. The full Web gate passed with 101 files / 839 tests
+  and the production build passed, with only the existing dynamic-import and
+  chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** traverse the packaged app by keyboard and
+  pointer, then capture default/high-contrast hover, focus-visible, pressed,
+  disabled, resize, trim, razor, forbidden, loading and dragging states with no
+  focus traps or unlabeled controls before final parity reclassification.
+
 ### Task 7: AP-i18n-runtime-contract (implementation-slice-2123bc4e99fa84c2)
 
 **Covered records:**
@@ -688,34 +756,41 @@
 - Exact acceptance contract:
   - Add deterministic unit tests for default/invalid persisted locale, zh-CN/en lookup, missing-key fallback, numeric/string interpolation, unknown placeholder preservation, locale persistence, and document.lang updates.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/i18n/index.test.ts#defaults_zh_cn_supports_en_and_preserves_unknown_named_placeholders` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/i18n/index.test.ts -t "defaults_zh_cn_supports_en_and_preserves_unknown_named_placeholders"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/i18n/index.ts#DEFAULT_LOCALE`, `web/src/i18n/index.ts#translate`, `web/src/i18n/dict.ts#DICTS`, `docs/modules/web/hooks-i18n-theme.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/i18n/index.test.ts -t "defaults_zh_cn_supports_en_and_preserves_unknown_named_placeholders"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the reviewed owner first failed because an invalid
+  persisted locale remained in storage after the runtime fell back to zh-CN.
+  The runtime now removes unsupported persisted values, tolerates unavailable
+  storage, and exports the default/translation boundaries for deterministic
+  proof. The full Web gate passed with 102 files / 840 tests and the production
+  build passed, with only the existing dynamic-import and chunk-size advisories.
+
 ### Task 8: AP-bg-placeholder-token (implementation-slice-2c3937178aa8f103)
 
 **Covered records:**
@@ -743,23 +818,23 @@
   - Visible/returned assertion: assert the exact visible text/control/state/focus result and the returned success or typed failure, including a no-op assertion for disabled, cancelled, or rejected input.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:web/src/__tests__/completion/doc-de0f95b975d2b2c6.test.ts#completion_de0f95b975d2b2c6_define_bg_placeholder_exactly_as_rgb_30_30_30_eq.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/styles/tokens.test.ts#bg_placeholder_equals_raised_rgb_30` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/styles/tokens.test.ts -t "bg_placeholder_equals_raised_rgb_30"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/styles/tokens.css#--bg-placeholder`, `web/src/styles/tokens.css#--bg-raised`, `docs/specs/frontend/1-design-tokens.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/styles/tokens.test.ts -t "bg_placeholder_equals_raised_rgb_30"`
 
@@ -771,6 +846,16 @@
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: focused RED was the reviewed owner being absent. The
+  existing CSS projection already held both tokens at exact `rgb(30,30,30)`,
+  so GREEN adds the missing direct equality proof without changing production
+  values. The focused owner passes. The full completion-audit regression gate
+  ran 206 assertions (203 passed); after removing an induced frozen-source
+  drift, the two remaining focused failures are both caused by the four
+  preserved, user-owned audit outputs not matching their normative
+  renders/inventory. Step 5 remains open until that external dirty state is
+  reconciled.
+
 ### Task 9: five-panel-layout-focus (implementation-slice-b99fb8c63f2086b0)
 
 **Covered records:**
@@ -798,37 +883,48 @@
   - Add token, semantic-role, keyboard-focus, state, privacy, and visual assertions for every named surface; the affected lint, typecheck, and web suites must pass.
   - Exercise the named surface with keyboard and browser or packaged-app visual inspection, and retain exact accessibility or screenshot evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/ui/PanelShell.test.tsx#PanelShell preview surface` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/components/shell/EditorSplit.test.tsx#all_presets_ratios_gutters_surfaces_focus` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/ui/PanelShell.test.tsx -t "PanelShell preview surface"`
   - Run: `pnpm -C web test -- --run src/components/shell/EditorSplit.test.tsx -t "all_presets_ratios_gutters_surfaces_focus"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/EditorSplit.tsx#EditorSplit`, `web/src/components/shell/EditorSplit.tsx#DefaultLayout`, `web/src/components/shell/EditorSplit.tsx#MediaLayout`, `web/src/components/shell/EditorSplit.tsx#VerticalLayout`, `web/src/components/ui/PanelShell.tsx#PanelShell`, `docs/specs/frontend/13-implementation.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/ui/PanelShell.test.tsx -t "PanelShell preview surface"`
   - Run: `pnpm -C web test -- --run src/components/shell/EditorSplit.test.tsx -t "all_presets_ratios_gutters_surfaces_focus"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reverified 2026-08-01: both owning runners pass (2 files / 4 tests), covering
+  all three presets at 1600×1000 plus reduced viewport, documented initial
+  ratios, panel visibility/maximize behavior, keyboard-adjustable separators,
+  semantic regions and focus transfer. The full Web gate passes with 103 files
+  / 841 tests and the production build passes, with only the existing
+  dynamic-import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** in the packaged app at 1600×1000, capture all
+  three presets with the five panels enabled and verify 5px gutters, 6px
+  surfaces, focused/unfocused rings, Tab focus and keyboard separator resize.
+
 ### Task 10: control-acceptance (implementation-slice-7729e824b5300938)
 
 **Covered records:**
@@ -855,34 +951,45 @@
   - Visible/accessibility/return path: success=keyframe lane seek: assert exactly if (e.target === e.currentTarget) setActiveFrame(startFrame + xToFrame(e.clientX)); contextmenu only preventDefault() and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"No dedicated shortcut is declared."}; returnPath=["Remain on the owning editor surface after local state or authoritative mirror refresh.","Retain focus on the native control or explicitly restore it when conditional UI closes; this must be asserted."].
   - Outcome matrix: {"success":"keyframe lane seek: assert exactly if (e.target === e.currentTarget) setActiveFrame(startFrame + xToFrame(e.clientX)); contextmenu only preventDefault() and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"N/A — no separate cancellation phase.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-75a9964d0b81961a keyframe lane seek` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-75a9964d0b81961a keyframe lane seek"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/KeyframesLaneRow.tsx`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframesLaneRow` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-75a9964d0b81961a keyframe lane seek"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the focused owner failed first because the lane had no
+  queryable/focusable semantic boundary. It now proves empty-lane pointer seek,
+  child-click isolation, context-menu no-op, zero edit-command emission,
+  horizontal slider semantics and keyboard frame seek with retained focus. The
+  full Web gate passes with 104 files / 842 tests and the production build
+  passes, with only the existing dynamic-import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** in the packaged Inspector keyframes panel,
+  verify pointer and keyboard seek, visible focus, frame updates, child click
+  isolation and right-click no-op before final control reclassification.
+
 ### Task 11: control-acceptance (implementation-slice-0fa7eb23d9e9be73)
 
 **Covered records:**
@@ -917,34 +1024,47 @@
   - Visible/accessibility/return path: success=keyframe diamond drag/context menu: assert exactly onMouseDown starts local drag; window mouseup calls edit.moveKeyframe(clip.id, property, fromFrame, currentFrame) only when the frame changed; onContextMenu sets menu { x: e.clientX, y: e.clientY, frame: kf.key } and emits no edit command and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"No dedicated shortcut is declared."}; returnPath=["Remain on the owning editor surface after local state or authoritative mirror refresh.","Retain focus on the native control or explicitly restore it when conditional UI closes; this must be asserted."].
   - Outcome matrix: {"success":"keyframe diamond drag/context menu: assert exactly onMouseDown starts local drag; window mouseup calls edit.moveKeyframe(clip.id, property, fromFrame, currentFrame) only when the frame changed; onContextMenu sets menu { x: e.clientX, y: e.clientY, frame: kf.key } and emits no edit command and no sibling branch/command.","pending":"A promise may be pending, but this candidate exposes no explicit progress state.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"N/A — no separate cancellation phase.","retry":"No automatic retry; repeated activation resubmits after the candidate becomes actionable.","failure":"Backend rejection is not caught/rendered at this fire-and-forget candidate; visible recovery evidence is required."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-4e0a20c7d0e54f3e keyframe diamond drag/context menu` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-4e0a20c7d0e54f3e keyframe diamond drag/context menu"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/KeyframesLaneRow.tsx`, `web/src/components/inspector/KeyframesLaneRow.tsx#handleDiamondMouseDown`, `web/src/store/editActions.ts#moveKeyframe`, `web/src/store/editActions.ts#applyAndRefresh`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-core/src/dto.rs#handle_edit_apply`, `crates/opentake-ops/src/command.rs#EditCommand::MoveKeyframe`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframesLaneRow`, `crates/opentake-ops/src/command.rs#EditCommand` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-4e0a20c7d0e54f3e keyframe diamond drag/context menu"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED proved the diamond lacked an accessible owner. The
+  focused test now covers unchanged-drag no-op, changed-drag exact single
+  command, right-click menu coordinates with zero edit calls, keyboard
+  one-frame movement with focus retention, and visible toast recovery on a
+  rejected command. The Web gate passes with 104 files / 843 tests plus a
+  production build. Formatting and the complete Rust workspace pass; only the
+  seven pre-existing real-device probes remain ignored.
+
+- [ ] **Runtime evidence gate:** in the packaged Inspector, drag a diamond,
+  open its menu by pointer and keyboard, verify focus/labels, and force a safe
+  rejected move to confirm visible recovery before final control
+  reclassification.
+
 ### Task 12: control-acceptance (implementation-slice-40b57db02ead9758)
 
 **Covered records:**
@@ -975,34 +1095,45 @@
   - Visible/accessibility/return path: success=dismiss keyframe context menu: assert exactly click calls onClose(); contextmenu preventDefault() then onClose() and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"Escape/outside close exists where mounted, but arrow-key roving focus and invoking-control focus restoration are not proven."}; returnPath=["Close through selected item, Escape, or outside action exactly where implemented.","Restore focus to the invoking control; current code does not explicitly prove this."].
   - Outcome matrix: {"success":"dismiss keyframe context menu: assert exactly click calls onClose(); contextmenu preventDefault() then onClose() and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Dismiss/close leaves authoritative state unchanged; invoking-control focus restoration is not proven.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-6e36c47f93f0d4fb dismiss keyframe context menu` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-6e36c47f93f0d4fb dismiss keyframe context menu"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/KeyframesLaneRow.tsx`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframeContextMenu`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframesLaneRow` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-6e36c47f93f0d4fb dismiss keyframe context menu"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED proved the context menu had no menu semantic or
+  focus contract. The owning test now proves outside click, outside
+  context-menu and Escape each dismiss without an edit command, and each path
+  restores focus to the invoking diamond. The full Web gate passes with 104
+  files / 844 tests and the production build passes, with only the existing
+  dynamic-import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** open and dismiss the packaged keyframe menu by
+  pointer, right-click and Escape, confirming visible focus returns to the
+  invoking diamond before final control reclassification.
+
 ### Task 13: control-acceptance (implementation-slice-29f0b31549c65faf)
 
 **Covered records:**
@@ -1036,34 +1167,45 @@
   - Visible/accessibility/return path: success=delete keyframe: assert exactly onDelete() -> edit.removeKeyframe(clip.id, property, menu.frame); then closeMenu() and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"Escape/outside close exists where mounted, but arrow-key roving focus and invoking-control focus restoration are not proven."}; returnPath=["Close through selected item, Escape, or outside action exactly where implemented.","Restore focus to the invoking control; current code does not explicitly prove this."].
   - Outcome matrix: {"success":"delete keyframe: assert exactly onDelete() -> edit.removeKeyframe(clip.id, property, menu.frame); then closeMenu() and no sibling branch/command.","pending":"A promise may be pending, but this candidate exposes no explicit progress state.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Dismiss/close leaves authoritative state unchanged; invoking-control focus restoration is not proven.","retry":"No automatic retry; repeated activation resubmits after the candidate becomes actionable.","failure":"Backend rejection is not caught/rendered at this fire-and-forget candidate; visible recovery evidence is required."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-c191a17716450b1a delete keyframe` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-c191a17716450b1a delete keyframe"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/KeyframesLaneRow.tsx`, `web/src/store/editActions.ts#removeKeyframe`, `web/src/store/editActions.ts#applyAndRefresh`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-core/src/dto.rs#handle_edit_apply`, `crates/opentake-ops/src/command.rs#EditCommand::RemoveKeyframe`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframesLaneRow`, `crates/opentake-ops/src/command.rs#EditCommand` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-c191a17716450b1a delete keyframe"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED proved the delete item lacked a native accessible
+  action boundary. The owner now proves one exact remove command, no sibling
+  edit command, immediate menu close, trigger-focus restoration and visible
+  toast recovery after backend rejection. The Web gate passes with 104 files /
+  845 tests plus a production build. Formatting and the complete Rust workspace
+  pass; only the seven pre-existing real-device probes remain ignored.
+
+- [ ] **Runtime evidence gate:** delete a disposable keyframe from the packaged
+  menu by pointer and keyboard, verify focus restoration and safely exercise a
+  rejected deletion before final control reclassification.
+
 ### Task 14: control-acceptance (implementation-slice-a43944e5aef30cb5)
 
 **Covered records:**
@@ -1129,7 +1271,7 @@
   - Visible/accessibility/return path: success=smooth keyframe interpolation: assert exactly onSetInterpolation('smooth') -> edit.setKeyframeInterpolation(clip.id, property, menu.frame, 'smooth'); then closeMenu() and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"Escape/outside close exists where mounted, but arrow-key roving focus and invoking-control focus restoration are not proven."}; returnPath=["Close through selected item, Escape, or outside action exactly where implemented.","Restore focus to the invoking control; current code does not explicitly prove this."].
   - Outcome matrix: {"success":"smooth keyframe interpolation: assert exactly onSetInterpolation('smooth') -> edit.setKeyframeInterpolation(clip.id, property, menu.frame, 'smooth'); then closeMenu() and no sibling branch/command.","pending":"A promise may be pending, but this candidate exposes no explicit progress state.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Dismiss/close leaves authoritative state unchanged; invoking-control focus restoration is not proven.","retry":"No automatic retry; repeated activation resubmits after the candidate becomes actionable.","failure":"Backend rejection is not caught/rendered at this fire-and-forget candidate; visible recovery evidence is required."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-3b4230aba22c9422 linear keyframe interpolation` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx#control-16737eebbe9cb784 hold keyframe interpolation` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -1137,7 +1279,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-3b4230aba22c9422 linear keyframe interpolation"`
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-16737eebbe9cb784 hold keyframe interpolation"`
@@ -1145,11 +1287,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/KeyframesLaneRow.tsx`, `web/src/store/editActions.ts#setKeyframeInterpolation`, `web/src/store/editActions.ts#applyAndRefresh`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-core/src/dto.rs#handle_edit_apply`, `crates/opentake-ops/src/command.rs#EditCommand::SetKeyframeInterpolation`, `web/src/components/inspector/KeyframesLaneRow.tsx#KeyframesLaneRow`, `crates/opentake-ops/src/command.rs#EditCommand` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-3b4230aba22c9422 linear keyframe interpolation"`
   - Run: `pnpm -C web test -- --run src/components/inspector/KeyframesLaneRow.interaction.test.tsx -t "control-16737eebbe9cb784 hold keyframe interpolation"`
@@ -1157,12 +1299,25 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: all three focused owners first failed only on absent
+  failure recovery. Linear, hold and smooth now each prove one exact
+  interpolation command, no sibling command, native menuitem activation,
+  immediate close, trigger-focus restoration and a visible rejected-command
+  toast. The Web gate passes with 104 files / 848 tests plus a production build.
+  Formatting and the complete Rust workspace pass; only the seven pre-existing
+  real-device probes remain ignored.
+
+- [ ] **Runtime evidence gate:** set linear, hold and smooth on disposable
+  keyframes in the packaged menu using pointer and keyboard, verify focus
+  restoration and a safe rejection state before final control
+  reclassification.
+
 ### Task 15: control-acceptance (implementation-slice-112e03f8a358e250)
 
 **Covered records:**
@@ -1208,37 +1363,49 @@
   - Visible/accessibility/return path: success=pointer-scrubbable numeric value: assert exactly pointerdown captures start; pointermove computes clamped startValue + delta*sensitivity (Shift x10, Command x0.1) and calls p.onChange?.(next); pointerup calls p.onCommit(provisionalValue) exactly once when moved, otherwise enters text editing and no sibling branch/command.; accessibility={"focus":"Pointer-only span has no tabIndex or keyboard adjustment.","label":"No role or accessible name exists on the displayed-value span.","shortcut":"Shift/Command change pointer sensitivity only."}; returnPath=["Pointerup/cancel releases the gesture and remains on the same editor surface.","A keyboard equivalent must retain/restore focus; current custom drag surface does not prove one."].
   - Outcome matrix: {"success":"pointer-scrubbable numeric value: assert exactly pointerdown captures start; pointermove computes clamped startValue + delta*sensitivity (Shift x10, Command x0.1) and calls p.onChange?.(next); pointerup calls p.onCommit(provisionalValue) exactly once when moved, otherwise enters text editing and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Pointer capture loss/Escape cancellation is not implemented for the drag.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/inspector/ScrubbableNumberField.interaction.test.tsx#control-481c7d66573516a6 numeric text-entry mode` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/inspector/ScrubbableNumberField.interaction.test.tsx#control-3e4fc80f4dde046e pointer-scrubbable numeric value` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/ScrubbableNumberField.interaction.test.tsx -t "control-481c7d66573516a6 numeric text-entry mode"`
   - Run: `pnpm -C web test -- --run src/components/inspector/ScrubbableNumberField.interaction.test.tsx -t "control-3e4fc80f4dde046e pointer-scrubbable numeric value"`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/inspector/ScrubbableNumberField.tsx`, `web/src/components/inspector/ScrubbableNumberField.tsx#ScrubbableNumberField` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/inspector/ScrubbableNumberField.interaction.test.tsx -t "control-481c7d66573516a6 numeric text-entry mode"`
   - Run: `pnpm -C web test -- --run src/components/inspector/ScrubbableNumberField.interaction.test.tsx -t "control-3e4fc80f4dde046e pointer-scrubbable numeric value"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED exposed missing post-edit focus restoration and
+  pointer-cancellation cleanup. The two owners now prove suffix/decimal-comma
+  parsing, finite-only clamped commit, invalid/blur and Escape behavior,
+  thresholded live scrub, Shift/Command multipliers, exactly-once pointerup
+  commit, pointercancel/lost-capture/Escape cancellation and focus retention.
+  The full Web gate passes with 105 files / 850 tests and the production build
+  passes, with only the existing dynamic-import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** exercise text entry, modifier scrubbing,
+  pointer-capture loss and Escape cancellation in the packaged Inspector,
+  confirming focus and visible values before final control reclassification.
+
 ### Task 16: control-acceptance (implementation-slice-aea2e7e06f8f518b)
 
 **Covered records:**
@@ -1272,34 +1439,47 @@
   - Visible/accessibility/return path: success=pointer scrub preview playhead: assert exactly pointerdown sets capture, calls onScrubbingChange?.(true), then seekFromEvent(clientX) -> onSeek(Math.round(ratio * total)); pointermove with buttons===1 repeats seek; pointerup/lost capture calls onScrubbingChange?.(false); hover only changes local hover state and no sibling branch/command.; accessibility={"focus":"Scrub div has no role or tabIndex.","label":"No slider accessible name/value semantics exist.","shortcut":"No Arrow/Home/End seek handling exists."}; returnPath=["Pointerup/cancel releases the gesture and remains on the same editor surface.","A keyboard equivalent must retain/restore focus; current custom drag surface does not prove one."].
   - Outcome matrix: {"success":"pointer scrub preview playhead: assert exactly pointerdown sets capture, calls onScrubbingChange?.(true), then seekFromEvent(clientX) -> onSeek(Math.round(ratio * total)); pointermove with buttons===1 repeats seek; pointerup/lost capture calls onScrubbingChange?.(false); hover only changes local hover state and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Pointerup or lost capture clears scrubbing; no keyboard/Escape path exists.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/preview/Preview.interaction.test.tsx#control-200c9fd6ec3f0f35 pointer scrub preview playhead` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/preview/Preview.interaction.test.tsx -t "control-200c9fd6ec3f0f35 pointer scrub preview playhead"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/preview/Preview.tsx`, `web/src/components/preview/Preview.tsx#ScrubBar`, `web/src/components/preview/Preview.tsx#Preview` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/preview/Preview.interaction.test.tsx -t "control-200c9fd6ec3f0f35 pointer scrub preview playhead"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED exposed a real sticky-scrubbing defect: the cancel
+  state transition intentionally has no seek effect, but the component also
+  suppressed the required `scrubbing=false` notification. The owner now proves
+  capture, down/move/exact-up seeks, buttons guard, hover-only state,
+  lost-capture/pointercancel cleanup, horizontal slider semantics and
+  Arrow/Home/End keyboard seeks with retained focus. The full Web gate passes
+  with 106 files / 851 tests and the production build passes, with only the
+  existing dynamic-import and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** scrub the packaged Preview by pointer, force
+  capture loss/cancel, hover the control and seek by keyboard while confirming
+  playhead/focus/scrubbing state before final control reclassification.
+
 ### Task 17: control-acceptance (implementation-slice-c09938dfb4f83d4c)
 
 **Covered records:**
@@ -1326,34 +1506,46 @@
   - Visible/accessibility/return path: success=resize two editor panes: pointer capture; move clamps first pane to min and secondMin; accessibility={"focus":"Non-focusable div","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Pointer capture releases on pointerup; no keyboard focus path exists."].
   - Outcome matrix: {"success":"resize two editor panes: pointer capture; move clamps first pane to min and secondMin","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/SplitPane.interaction.test.tsx#control-d88c7103e09bb382 resize two editor panes` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/SplitPane.interaction.test.tsx -t "control-d88c7103e09bb382 resize two editor panes"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/SplitPane.tsx`, `web/src/components/shell/SplitPane.tsx#SplitPane` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/SplitPane.interaction.test.tsx -t "control-d88c7103e09bb382 resize two editor panes"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: RED proved pointer cancellation left the separator in
+  its dragging state. The owner now covers stable separator capture/release,
+  horizontal and vertical geometry, both min clamps, pointerup/cancel/lost
+  capture/Escape cleanup, semantic separator values and Home/End keyboard
+  resize with retained focus. The full Web gate passes with 107 files / 852
+  tests and the production build passes, with only the existing dynamic-import
+  and chunk-size advisories.
+
+- [ ] **Runtime evidence gate:** resize horizontal and vertical packaged panes
+  by pointer and keyboard, force cancellation/capture loss and confirm clamps,
+  cursor, focus and dragging state before final control reclassification.
+
 ### Task 18: control-acceptance (implementation-slice-30967cbef194812a)
 
 **Covered records:**
@@ -1419,7 +1611,7 @@
   - Visible/accessibility/return path: success=toggle track sync lock: assert exactly setTrackProps(p.index, { syncLocked: !p.syncLocked }) and no sibling branch/command.; accessibility={"focus":"role=button span has no tabIndex and is not keyboard-focusable.","label":"title supplies text but aria-pressed is absent.","shortcut":"No Enter/Space handler exists."}; returnPath=["Remain on the owning editor surface after local state or authoritative mirror refresh.","Retain focus on the native control or explicitly restore it when conditional UI closes; this must be asserted."].
   - Outcome matrix: {"success":"toggle track sync lock: assert exactly setTrackProps(p.index, { syncLocked: !p.syncLocked }) and no sibling branch/command.","pending":"A promise may be pending, but this candidate exposes no explicit progress state.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"N/A — no separate cancellation phase.","retry":"No automatic retry; repeated activation resubmits after the candidate becomes actionable.","failure":"Backend rejection is not caught/rendered at this fire-and-forget candidate; visible recovery evidence is required."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx#control-4c72d4f81e47c57d mute audio track` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx#control-74289f5806f8162a hide visual track` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -1427,7 +1619,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-4c72d4f81e47c57d mute audio track"`
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-74289f5806f8162a hide visual track"`
@@ -1435,11 +1627,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/timeline/TrackHeaderColumn.tsx`, `web/src/store/editActions.ts#setTrackProps`, `web/src/store/editActions.ts#applyAndRefresh`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-core/src/dto.rs#handle_edit_apply`, `crates/opentake-ops/src/command.rs#EditCommand::SetTrackProps`, `web/src/components/timeline/TrackHeaderColumn.tsx#TrackHeaderColumn`, `crates/opentake-ops/src/command.rs#EditCommand` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-4c72d4f81e47c57d mute audio track"`
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-74289f5806f8162a hide visual track"`
@@ -1447,12 +1639,24 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: all three focused owners first failed because the
+  controls were non-focusable spans without pressed state. Mute, hide and sync
+  lock are now native labeled toggle buttons that each prove one exact
+  `setTrackProps` patch, no swap command, retained focus and visible recovery on
+  rejection. The Web gate passes with 108 files / 855 tests plus a production
+  build. Formatting and the complete Rust workspace pass; only the seven
+  pre-existing real-device probes remain ignored.
+
+- [ ] **Runtime evidence gate:** toggle mute, hide and sync lock by pointer and
+  keyboard in the packaged timeline, verifying icon/pressed/focus states and a
+  safe rejected update before final control reclassification.
+
 ### Task 19: control-acceptance (implementation-slice-d5ef678a62684383)
 
 **Covered records:**
@@ -1480,34 +1684,47 @@
   - Visible/accessibility/return path: success=resize track display height: assert exactly pointerdown captures startY; pointermove calls p.onResize(delta), whose wrapper computes clamp(h + delta, TRACK_SIZE.minHeight, TRACK_SIZE.maxHeight) then setTrackHeight(track.id,next); pointerup releases capture and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"No dedicated shortcut is declared."}; returnPath=["Pointerup/cancel releases the gesture and remains on the same editor surface.","A keyboard equivalent must retain/restore focus; current custom drag surface does not prove one."].
   - Outcome matrix: {"success":"resize track display height: assert exactly pointerdown captures startY; pointermove calls p.onResize(delta), whose wrapper computes clamp(h + delta, TRACK_SIZE.minHeight, TRACK_SIZE.maxHeight) then setTrackHeight(track.id,next); pointerup releases capture and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Pointerup/cancel follows the exact profile; Escape rollback is not otherwise implemented.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx#control-9f9173ff2ee37464 resize track display height` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-9f9173ff2ee37464 resize track display height"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/timeline/TrackHeaderColumn.tsx`, `web/src/components/timeline/TrackHeaderColumn.tsx#TrackHeaderRow`, `web/src/components/timeline/TrackHeaderColumn.tsx#TrackHeaderColumn` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-9f9173ff2ee37464 resize track display height"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the focused owner first failed because the resize grip
+  exposed no accessible control or cancellation state. The grip is now a
+  labeled horizontal separator with current/min/max values, retained focus,
+  Home/End/Arrow keyboard resizing, exact incremental pointer deltas and safe
+  pointerup/cancel/lost-capture release. The wrapper still owns the 32..200
+  clamp and the UI-only `setTrackHeight` write; no edit or reorder command is
+  emitted. The Web gate passes with 108 files / 856 tests plus a production
+  build.
+
+- [ ] **Runtime evidence gate:** resize an audio and visual track in the
+  packaged timeline by pointer and keyboard, then cancel an active drag and
+  verify focus/value/state recovery before final control reclassification.
+
 ### Task 20: control-acceptance (implementation-slice-a9b2786eddf478dc)
 
 **Covered records:**
@@ -1538,34 +1755,48 @@
   - Visible/accessibility/return path: success=dismiss track reorder menu: assert exactly backdrop mousedown calls onClose(); contextmenu preventDefault() then onClose() and no sibling branch/command.; accessibility={"focus":"Custom rendered element has no proven tabIndex/keyboard equivalent at this candidate.","label":"No explicit aria-label/title association was discovered at this candidate.","shortcut":"Escape/outside close exists where mounted, but arrow-key roving focus and invoking-control focus restoration are not proven."}; returnPath=["Close through selected item, Escape, or outside action exactly where implemented.","Restore focus to the invoking control; current code does not explicitly prove this."].
   - Outcome matrix: {"success":"dismiss track reorder menu: assert exactly backdrop mousedown calls onClose(); contextmenu preventDefault() then onClose() and no sibling branch/command.","pending":"N/A — synchronous local/browser state only.","empty":"N/A — owning visibility/handler guards prevent an absent target from emitting a command.","disabled":"No explicit disabled attribute beyond the listed visibility/handler guards.","cancel":"Dismiss/close leaves authoritative state unchanged; invoking-control focus restoration is not proven.","retry":"N/A — repeated activation is a new synchronous action.","failure":"N/A — no API/Tauri/Rust failure route."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx#control-db7fbb7edbcca44d dismiss track reorder menu` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-db7fbb7edbcca44d dismiss track reorder menu"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/timeline/TrackHeaderColumn.tsx`, `web/src/components/timeline/TrackHeaderColumn.tsx#TrackHeaderContextMenu`, `web/src/components/timeline/TrackHeaderColumn.tsx#TrackHeaderColumn` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/timeline/TrackHeaderColumn.interaction.test.tsx -t "control-db7fbb7edbcca44d dismiss track reorder menu"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the focused owner first failed because the invoking row
+  and menu backdrop had no stable accessible boundary. The row now supports
+  pointer context menus plus ContextMenu/Shift+F10, the menu moves focus to an
+  enabled item or its container, supports roving Arrow/Home/End focus and
+  Escape dismissal, and every dismissal restores focus to the invoking row.
+  Backdrop contextmenu now stops Portal bubbling so closing cannot immediately
+  reopen the menu. Outside mousedown and contextmenu emit no edit/reorder
+  command. The Web gate passes with 108 files / 857 tests plus a production
+  build.
+
+- [ ] **Runtime evidence gate:** open the packaged track reorder menu by right
+  click and Shift+F10, traverse it by keyboard, dismiss it by outside click,
+  right click and Escape, and verify invoking-row focus restoration.
+
 ### Task 21: control-acceptance (implementation-slice-440d530594b95cd0)
 
 **Covered records:**
@@ -1592,34 +1823,47 @@
   - Visible/accessibility/return path: success=open/close a reusable enum Dropdown: setOpen toggles; outside/Escape closes; accessibility={"focus":"Native keyboard-focusable control","label":"ariaLabel","shortcut":"None declared on this control"}; returnPath=["Outside click/Escape closes visually; DOM focus is not explicitly restored."].
   - Outcome matrix: {"success":"open/close a reusable enum Dropdown: setOpen toggles; outside/Escape closes","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in setOpen toggles; outside/Escape closes; no broader cancellation behavior is assumed.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/ui/Dropdown.interaction.test.tsx#control-f1370db38b24cf33 open/close a reusable enum Dropdown` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/ui/Dropdown.interaction.test.tsx -t "control-f1370db38b24cf33 open/close a reusable enum Dropdown"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/ui/Dropdown.tsx`, `web/src/components/ui/Dropdown.tsx#Dropdown` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/ui/Dropdown.interaction.test.tsx -t "control-f1370db38b24cf33 open/close a reusable enum Dropdown"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01: the focused owner first failed because the trigger had
+  no programmatic listbox relationship and dismissal did not restore focus.
+  Opening now focuses the selected enabled option (or first enabled fallback),
+  Arrow/Home/End move only among enabled options, and outside click, Escape,
+  option selection or a second trigger activation closes safely and restores
+  the native labeled trigger. The synchronous open/close path emits no caller
+  change. The Web gate passes with 109 files / 858 tests plus a production
+  build.
+
+- [ ] **Runtime evidence gate:** exercise a packaged reusable Dropdown by
+  pointer and keyboard, verify selected/disabled option navigation, then close
+  by outside click, Escape and the trigger while checking focus restoration.
+
 ### Task 22: control-acceptance (implementation-slice-ba029e02db838d36)
 
 **Covered records:**
@@ -1646,30 +1890,44 @@
   - Visible/accessibility/return path: success=focus an editor panel: onMouseDown -> focusPanel(panel) -> focus ring; accessibility={"focus":"Outer div is not keyboard focusable","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Focus state remains on the selected panel until another panel is clicked/shortcut-selected."].
   - Outcome matrix: {"success":"focus an editor panel: onMouseDown -> focusPanel(panel) -> focus ring","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/ui/PanelShell.interaction.test.tsx#control-bbc125bbbf2275f2 focus an editor panel` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/ui/PanelShell.interaction.test.tsx -t "control-bbc125bbbf2275f2 focus an editor panel"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/ui/PanelShell.tsx`, `web/src/components/ui/PanelShell.tsx#PanelShell` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/ui/PanelShell.interaction.test.tsx -t "control-bbc125bbbf2275f2 focus an editor panel"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
+
+  Verified 2026-08-01: the reviewed owner is now present and proves the exact
+  mousedown -> `focusPanel("media")` -> focus-ring path, including the intended
+  clip-selection clear without disturbing media selection. The baseline
+  production component already carried the required labeled region,
+  `tabIndex=0`, mouse handler and focus handler from the earlier panel-surface
+  hardening, so the contract passed without another production mutation; the
+  planned RED premise was stale. The keyboard focus path independently proves
+  retained DOM focus and the same visible ring. The Web gate passes with 110
+  files / 859 tests plus a production build.
+
+- [ ] **Runtime evidence gate:** in the packaged editor, switch among all five
+  panels by pointer and keyboard focus, verifying the focus ring and the media/
+  timeline selection-clearing rules before final control reclassification.
diff --git a/docs/audit/2026-07-14/implementation-plans/agent-settings-generation-implementation.md b/docs/audit/2026-07-14/implementation-plans/agent-settings-generation-implementation.md
index aac026fc..81f8aca3 100644
--- a/docs/audit/2026-07-14/implementation-plans/agent-settings-generation-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/agent-settings-generation-implementation.md
@@ -12,7 +12,22 @@
 
 ### Task 1: advertised-mcp-tool-reachability + AG-advertised-tool-surface-acceptance (implementation-slice-6a8f42f312c40661)
 
-**2026-07-29 progress (not closed):** The production discovery surface now contains 38 tools with real dispatch paths. `inspect_media` is wired through the desktop `MediaBridge` for image/video/audio inspection, storyboard sampling, and local/cached transcription; deterministic dispatcher tests plus Tauri image/storyboard/symlink tests pass. The six generation/upscale/Motion names remain schema-known for compatibility but are absent from MCP/Chat discovery and from the system prompt until their production backends exist. This satisfies the fail-closed discovery portion, but this task remains incomplete: Lottie inspection, generation authorization/job lifecycle/provider integration, Motion rendering/import, and retained runtime/device evidence below are still outstanding.
+**2026-08-01 completion:** The production base catalog contains 39 real dispatch
+paths and is filtered per host session: seven media/transcript tools require the
+desktop `MediaBridge`; four generation/upscale tools are appended only with
+compatible managed or BYOK authorization; Motion add/edit are appended only
+when the Chromium/FFmpeg production bridge is ready. `inspect_media` now covers
+image/video/audio/Lottie: Lottie uses the shared Velato/Vello renderer, samples
+the requested source-time window over neutral gray, and returns authoritative
+canvas, frame-rate, duration, and encoded-frame metadata. `inspect_timeline`
+uses that same materializer rather than silently omitting Lottie layers. The
+focused RED reproduced the former typed-unavailable result; the GREEN GPU test,
+advertised-tool matrix, hidden-tool fail-closed test, Clippy, formatting, and
+full workspace regression all pass. Motion rendering/import/undo/save/reopen is
+owned by and completed in Task 4. Native evidence is retained in
+`docs/audit/2026-07-14/runtime-artifacts/automated/agent-lottie-inspect-real-device-2026-08-01.md`.
+
+**2026-08-01 superseding progress:** Script-to-video now persists a hash/provenance-bearing reviewed plan before placement, exposes a multi-segment editor with retry/cancel/apply/undo, atomically builds visual/narration tracks and exact transition boundaries, and passes real save/reopen plus H.264/AAC export. The remaining open capability implementations are avatar and voice clone; the talking-head and packaged-GUI closure work described above remains separately tracked.
 
 **Covered records:**
 - `requirement-1c40dd077c50436b` (requirement)
@@ -223,32 +238,32 @@
   - Contract tests enumerate the advertised and dispatched tool sets bidirectionally, and integration tests invoke every high-risk write/generation path.
   - Agent/MCP runtime receipts and independent review pass on the exact tree.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/src/mcp/dispatch.rs#hidden_tool_is_rejected_as_unadvertised` (existing-owned) — Exact named test records the fail-closed compatibility-name boundary.
   - `crates/opentake-agent/tests/advertised_tool_acceptance.rs#every_advertised_tool_is_live_or_absent` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-agent hidden_tool_is_rejected_as_unadvertised`
   - Run: `cargo test -p opentake-agent --test advertised_tool_acceptance every_advertised_tool_is_live_or_absent -- --exact`
 
   Expected: FAIL because one or more of the 17 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-agent/src/chat/loop.rs#tool_catalog`, `crates/opentake-agent/src/mcp/dispatch.rs#Dispatcher::dispatch`, `crates/opentake-agent/src/mcp/dispatch.rs#dispatch`, `crates/opentake-agent/src/tools/names.rs#ToolName::ALL`, `CLAUDE.md`, `docs/architecture/BUGS.md`, `docs/architecture/FULL_PROJECT_SCAN_REPORT.md`, `docs/architecture/HANDOFF-2026-07.md`, `docs/architecture/ROADMAP.md`, `docs/architecture/editing-automation/EDITING-AUTOMATION/agent-editing-suggestions.md`, `docs/specs/agent/10-implementation.md`, `docs/specs/agent/2-tools.md`, `docs/superpowers/specs/2026-07-10-opentake-full-convergence-design.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent stub_tool_reports_not_implemented`
   - Run: `cargo test -p opentake-agent --test advertised_tool_acceptance every_advertised_tool_is_live_or_absent -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -489,6 +504,10 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
 
 ### Task 3: advanced-ai-workflows (implementation-slice-aec7c23c8d96431e)
 
+**2026-08-01 decomposition note (not closed):** This umbrella combines ten independent product capabilities and cannot be completed by editing only `ToolName::ALL` plus one document. Work is proceeding as independently verified vertical slices. The talking-head slice now has production `remove_filler_words` and `tighten_silences` previews, configurable transcript/PCM thresholds, reviewable accepted-by-default ranges, atomic ripple application, exact one-step undo, fail-closed transcript discovery, and a fixed 30-second linked A/V regression. `requirement-9b922be7c8e92147` remains open until the combined real-media fixture also passes save/reopen/export and the user-facing per-cut review path is exercised. Motion tracking now has a strict capability-gated Agent contract, production desktop bridge, bounded real-video region analysis, editable linear position keyframes, typed low-confidence refusal, cancellation, optimistic revision commit, and one-step undo. Its deterministic target remains within five pixels and a generated MP4 exercises preview/apply/cancel/undo. It remains open for Inspector/Preview region selection, progress/retry, preview/export transform parity, save/reopen, and packaged GUI evidence. AI matting now has an official pinned RVM model, explicit verified installation, recurrent on-device inference, frame-aligned ProRes 4444 alpha plus audio, Inspector preview/cancel/retry/apply/undo, durable provenance, save/reopen, and alpha-aware playback/export plans; packaged GUI and final export inspection remain. Object removal now has editable-mask and frame-range input, an honest on-device boundary-fill provider/model, content-addressed ProRes 422 preview with audio, cancel/retry/apply, atomic media-swap-plus-mask-clear undo, source/provenance retention, failure atomicity, save/reopen, and exact preview/published-derivative identity; packaged GUI and final export inspection remain. Color match now samples image/video references and target frames in linear BT.709, generates an ordinary editable luma-preserving grade, reports CIE Delta E before/after, persists algorithm/version/source frames/statistics, clears stale provenance after manual edits, and supports preview/cancel/retry/apply/undo/save/reopen; packaged GUI and final preview/export inspection remain. Stem separation now routes through the same verified local model from Inspector and Agent, produces two stable provenanced media assets, reports progress/cancel/retry, exposes direct auditions, imports both aligned outputs to separate tracks in one undo entry, survives save/reopen/export, and enforces a >=60 dB mono-compatible reconstruction threshold; the documented centre/side semantic scope remains explicit. Caption translation now uses consented BYOK OpenAI/Anthropic providers, produces a strict ID-keyed review draft, allows per-caption accept/reject and retry, applies accepted text atomically with source/target locale plus provider/model provenance, preserves IDs/timing, clears stale provenance on manual edits, and supports one-step undo/save/reopen. Mock success/partial/failure and Captions UI review tests pass. The remaining three capabilities (script-to-video, avatar, and voice clone) are still open.
+
+The preceding decomposition paragraph is a historical checkpoint: its final sentence is superseded by the progress record at the top of this plan. Script-to-video is now closed; avatar and voice clone remain open.
+
 **Covered records:**
 - `requirement-fdd45062091b48f3` (requirement)
 - `requirement-70db6b4ad2dbd708` (requirement)
@@ -638,6 +657,15 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
 
 ### Task 4: motion-canvas-production-runner + AG-motion-canvas-vertical (implementation-slice-0a5150eba626d02b)
 
+**2026-08-01 completion:** Beta v1 is closed. The pinned Motion Canvas 3.17.2
+wrapper, deterministic title-card render, validated `output.mp4`/result metadata,
+capability-safe Tauri/Core transaction, Motion Panel, and dynamically advertised
+Agent add/edit tools share one production path. Native acceptance verifies
+create/edit/undo/save/reopen, cancel/error/no-mutation boundaries, traversal and
+symlink rejection, deterministic duplicate pixels/metadata, and inclusion in
+both `composite_frame` and `export_video`. Transparent output, arbitrary TSX,
+and frame-sequence sources remain separately scoped post-Beta work.
+
 **Covered records:**
 - `requirement-62ed34afe0cbaddc` (requirement)
 - `requirement-8bde5113959f02c8` (requirement)
@@ -702,7 +730,7 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
   - src-tauri/src/motion_canvas.rs exposes the registered command and never accepts output/work paths outside retained application/project authorities.
   - Tests cover success, renderer failure, cancellation, traversal/symlink rejection, malformed result JSON, and no manifest/timeline mutation before validation.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/renderer.rs#chromium_skeleton_reports_unavailable_not_panic` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-motion/tests/pipeline.rs#full_pipeline_render_cache_and_ingest` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -710,7 +738,7 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion chromium_skeleton_reports_unavailable_not_panic`
   - Run: `cargo test -p opentake-motion --test pipeline full_pipeline_render_cache_and_ingest -- --exact`
@@ -718,11 +746,11 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-agent/src/mcp/dispatch.rs#Dispatcher::dispatch`, `crates/opentake-agent/src/mcp/dispatch.rs#run_body`, `crates/opentake-motion/src/cache.rs#MotionCache`, `crates/opentake-motion/src/integration.rs#MotionClipSource`, `crates/opentake-motion/src/renderer.rs#HeadlessChromiumRenderer`, `crates/opentake-motion/src/renderer.rs#HeadlessChromiumRenderer::render`, `crates/opentake-motion/src/renderer.rs#MotionRenderer`, `src-tauri/src/motion.rs#render_import_place`, `web/src/components/agent/MotionPanel.tsx#MotionPanel`, `docs/architecture/ROADMAP.md`, `docs/modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion chromium_skeleton_reports_unavailable_not_panic`
   - Run: `cargo test -p opentake-motion --test pipeline full_pipeline_render_cache_and_ingest -- --exact`
@@ -730,7 +758,7 @@ Completion evidence (2026-07-29): the four named focused tests pass; `generation
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
diff --git a/docs/audit/2026-07-14/implementation-plans/command-contracts-implementation.md b/docs/audit/2026-07-14/implementation-plans/command-contracts-implementation.md
index f15a5877..16f93eba 100644
--- a/docs/audit/2026-07-14/implementation-plans/command-contracts-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/command-contracts-implementation.md
@@ -34,34 +34,56 @@
   - Keep explicitly nearest-frame UI interactions documented and separate so the conversion policy cannot drift between call sites.
   - Add editActions cases for positive fractional values 0.49, 0.5, 0.99, and 1.01 frames at 24/30 fps plus negative/invalid inputs; assert exact parity with Rust conversion vectors.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/editActions.test.ts#seconds_to_frame_truncates_fractional_boundaries` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: The exact owner covers 24/30 fps at sub-frame, half-frame,
+  near-next-frame, and multi-frame fractional boundaries. It also exercises the
+  media-drop, ripple-insert, search-moment, and default-text call sites plus
+  negative, NaN, and infinite inputs.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/store/editActions.test.ts -t "seconds_to_frame_truncates_fractional_boundaries"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced. A 10.5-frame media duration returned 11 rather than
+  the Rust-compatible truncated value 10; Vitest reported 1 failed test and a
+  nonzero pnpm exit.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/editActions.ts#mediaDurationFrames`, `web/src/store/editActions.ts#momentDurationFrames`, `web/src/lib/timelineInsert.ts#buildInsertPlan`, `docs/architecture/BUGS.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Duration and offset conversions now truncate toward zero with finite
+  fallbacks. Media placement, moment trim start/length, ripple insertion, and
+  default text duration share the Rust conversion policy. Explicit
+  nearest-frame playhead interactions retain `Math.round` and are documented as
+  a separate UI policy.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/editActions.test.ts -t "seconds_to_frame_truncates_fractional_boundaries"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN; the exact owner passed and the command executed the complete
+  82-file Web suite: 775 tests passed, 0 failed.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: `pnpm -C web test -- --run` passed 82 files / 775 tests and
+  `pnpm -C web build` passed. Vite reported only the existing dynamic-import
+  and bundle-size advisory warnings.
+
 ### Task 2: CC-first-video-settings (implementation-slice-699b13ae9742edd8)
 
 **Covered records:**
@@ -87,37 +109,66 @@
   - Add request/response tests for every named success, boundary, rejection, validation, and secrecy rule; the affected Rust and TypeScript suites must pass.
   - Exercise the production IPC, MCP, or browser entry point end to end and record the exact command payload, result, and test names before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-ops/src/command.rs#set_timeline_settings_is_undoable` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/lib/projectSettings.test.ts#first_video_auto_configures_and_only_configured_empty_mismatch_prompts` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: The exact reviewed owner now covers no-video, fresh-project,
+  configured-nonempty, configured-empty matching/mismatching, and incomplete
+  metadata branches. `editActions.test.ts` additionally proves the production
+  placement command order and both mismatch choices; the dialog DOM owner
+  verifies its accessible role, labels, focus, values, Match response, and
+  Escape/Keep response. The Rust DTO owner asserts the `sourceFps` wire field.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-ops set_timeline_settings_is_undoable`
   - Run: `pnpm -C web test -- --run src/lib/projectSettings.test.ts -t "first_video_auto_configures_and_only_configured_empty_mismatch_prompts"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced before implementation: Vitest could not resolve
+  `./projectSettings` from the declared exact owner because the decision module
+  and its production integration did not exist.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/editActions.ts#addMediaToTimelineAt`, `crates/opentake-ops/src/command.rs#EditCommand`, `crates/opentake-ops/src/ops/settings.rs#set_timeline_settings`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Added the pure four-branch decision, projected probed source FPS
+  through the Tauri DTO, and reconciled settings on both append and positioned
+  media entry points before placement. Fresh projects apply the existing
+  undoable `setTimelineSettings` command first. Configured-empty mismatches wait
+  for a globally mounted, keyboard-accessible dialog; keeping proceeds without
+  mutation and matching applies the same command before placement. Pending
+  choices are safely resolved when project runtime state resets.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-ops set_timeline_settings_is_undoable`
   - Run: `pnpm -C web test -- --run src/lib/projectSettings.test.ts -t "first_video_auto_configures_and_only_configured_empty_mismatch_prompts"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN. The three focused Web owners passed 33/33 tests, including the
+  exact named owner and production command/dialog integration. The exact Rust
+  undo owner passed 1/1, and the Tauri media DTO owner passed 1/1.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: `cargo fmt --all -- --check`, `cargo test --workspace --no-fail-fast`,
+  `pnpm -C web test -- --run`, and `pnpm -C web build` passed. The Web gate
+  executed 84 files / 779 tests; Cargo's seven explicitly ignored real-device
+  probes remain owned by the later packaged-app verification phase. Vite
+  reported only the pre-existing dynamic-import and chunk-size advisories.
+
 ### Task 3: CC-automation-composite-headings (implementation-slice-7167819f4cff454a)
 
 **Covered records:**
@@ -238,34 +289,62 @@
   - Visible/returned assertion: assert the exact returned success/error and the observable state described by “Minimum Local Verification”, including deterministic no-op behavior when the operation is rejected.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:tools/completion-tests/doc-6b9188efd87853b7.test.mjs#completion_6b9188efd87853b7_the_named_automation_checks_have_matching_source.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/tests/editing_automation_acceptance.rs#automation_children_are_atomic_reviewable_and_command_routed` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Added the exact integration owner plus all seven candidate-bound Node
+  completion owners. The integration fixture exercises deterministic beat and
+  autocrop analysis, review-only MCP beat/silence results, typed smart-reframe
+  unavailability, single-command reframe/beat plans, linked-A/V intent flags,
+  rejected-plan no-op behavior, command-routed mutation, and exact undo.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-agent --test editing_automation_acceptance automation_children_are_atomic_reviewable_and_command_routed -- --exact`
 
   Expected: FAIL because one or more of the 7 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced: Cargo reported that no
+  `editing_automation_acceptance` test target existed, so the reviewed owner
+  could not execute.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-agent/src/mcp/dispatch.rs#Dispatcher`, `crates/opentake-media/src/analysis/autocrop.rs#detect_autocrop`, `crates/opentake-ops/src/intent.rs#plan_smart_reframe`, `crates/opentake-media/src/analysis/beat.rs#detect_beats`, `docs/architecture/editing-automation/EDITING-AUTOMATION-DOS.md`, `docs/architecture/editing-automation/EDITING-AUTOMATION/acceptance-tests.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Review confirmed the mapped production children already satisfy this
+  shared umbrella: pure detectors are deterministic/fail closed; Dispatcher
+  preview tools do not apply; smart reframe returns a typed unavailable result;
+  intent planners emit exactly one existing `EditCommand`; and the command layer
+  owns mutation/undo. Added the missing cross-boundary acceptance suite and
+  source-specific completion adapters, then recorded the concrete evidence in
+  both source documents. No redundant production branch was introduced.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent --test editing_automation_acceptance automation_children_are_atomic_reviewable_and_command_routed -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN; the exact Rust owner passed 1/1 with `--exact`. All seven Node
+  completion owners passed 7/7 and each verifies that Cargo executed exactly one
+  owning test.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: `cargo fmt --all -- --check`, `cargo clippy -p opentake-agent --tests
+  -- -D warnings`, `cargo test --workspace --no-fail-fast`, the exact Rust
+  owner, all seven source owners, and the local relative Markdown-link gate
+  passed. The workspace retained only its seven explicitly ignored real-device
+  probes, which belong to packaged-app verification.
+
 ### Task 4: CC-beat-auto-cut (implementation-slice-d9ac8c92f3d41fea)
 
 **Covered records:**
@@ -357,7 +436,7 @@
   - Visible/returned assertion: assert the exact returned success/error and the observable state described by “Acceptance Hooks”, including deterministic no-op behavior when the operation is rejected.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:tools/completion-tests/doc-e7610731e7410ad4.test.mjs#completion_e7610731e7410ad4_beat_detection_inputs_produce_bounded_reviewable.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/src/analysis/beat.rs#pulse_audio_detects_beat_frame_with_strength` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-agent/src/mcp/dispatch.rs#auto_cut_to_beats_write_false_is_read_only` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
@@ -366,7 +445,12 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Added both exact Dispatcher owners and the low-energy detector owner,
+  retained the pulse owner, and added a frontend atomic-adapter regression. Five
+  source-bound Node owners execute all mapped boundaries and reject zero-test
+  filters.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media pulse_audio_detects_beat_frame_with_strength`
   - Run: `cargo test -p opentake-agent auto_cut_to_beats_write_false_is_read_only`
@@ -375,11 +459,23 @@
 
   Expected: FAIL because one or more of the 5 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced in two independent failures. Quiet alternating speech
+  energy generated false beats, and both Dispatcher owners rejected `write` as
+  an unknown field before any auto-cut write path existed.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/analysis/beat.rs#detect_beats`, `crates/opentake-agent/src/mcp/dispatch.rs#Dispatcher`, `web/src/store/editActions.ts#applyAutomationCommands`, `docs/architecture/editing-automation/EDITING-AUTOMATION/beat-sync-auto-cut.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Added an absolute onset-energy floor before relative normalization.
+  `auto_cut_to_beats` now accepts explicit `write` (default false), validates
+  visual roots and beat capacity, expands linked A/V members with one shared
+  delta, and applies exactly one existing `MoveClips` command. Preview remains
+  read-only. The frontend automation adapter now refuses multi-request
+  pseudo-transactions instead of serially committing partial edits; tool schema,
+  descriptions, and DOS documents reflect the production behavior.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media pulse_audio_detects_beat_frame_with_strength`
   - Run: `cargo test -p opentake-agent auto_cut_to_beats_write_false_is_read_only`
@@ -388,12 +484,21 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN. Each of the four exact Rust owners passed 1/1, the frontend
+  atomic owner passed 1/1, and all five source-bound owners passed 5/5.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. `cargo fmt --all -- --check`, the complete Web suite (84
+  files / 780 tests), production Web build, and
+  `cargo test --workspace --no-fail-fast` all completed successfully. The only
+  Web build diagnostics were the repository's existing dynamic-import and
+  chunk-size warnings; `git diff --check` was clean.
+
 ### Task 5: CC-event-forwarding-complete (implementation-slice-c35c845cbc3492dd)
 
 **Covered records:**
@@ -405,6 +510,8 @@
 - Modify: `docs/modules/src-tauri/setup-lib.md`
 - Test (existing-owned): `crates/opentake-core/src/events.rs#core_event_serializes_with_kind_tag`
 - Test (existing-owned): `crates/opentake-core/src/events.rs#media_changed_serializes_with_kind_tag`
+- Test (reviewed-planned): `src-tauri/src/lib.rs#core_event_forwarding_maps_every_name_and_tagged_payload`
+- Test (reviewed-planned): `src-tauri/src/lib.rs#core_event_forwarding_swallows_emit_failure_and_delivery_continues`
 
 **Candidate-bound contracts:**
 
@@ -417,37 +524,64 @@
   - Extract or inject an event emitter boundary that can be exercised without a live Tauri window.
   - Focused tests assert every CoreEvent maps to the expected event name and tagged payload, and an emit failure is swallowed without panicking or affecting the core session.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-core/src/events.rs#core_event_serializes_with_kind_tag` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-core/src/events.rs#media_changed_serializes_with_kind_tag` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
+  - `src-tauri/src/lib.rs#core_event_forwarding_maps_every_name_and_tagged_payload` (reviewed-planned) — The emitted name and unchanged tagged payload for every variant are owned at the shell boundary.
+  - `src-tauri/src/lib.rs#core_event_forwarding_swallows_emit_failure_and_delivery_continues` (reviewed-planned) — The best-effort failure policy is owned at the shell boundary without a live WebView.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Extended the exact core serialization owner across all four variants.
+  Added Tauri-boundary owners
+  `core_event_forwarding_maps_every_name_and_tagged_payload` and
+  `core_event_forwarding_swallows_emit_failure_and_delivery_continues`, using
+  no live window or `AppHandle`.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-core core_event_serializes_with_kind_tag`
   - Run: `cargo test -p opentake-core media_changed_serializes_with_kind_tag`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced at the actual missing seam: the new Tauri owner failed
+  to compile because `forward_core_event` did not exist. The two pre-existing
+  core serialization tests alone could not exercise the WebView emit-failure
+  policy.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-core/src/events.rs#CoreEvent`, `src-tauri/src/lib.rs#forward_event`, `docs/modules/src-tauri/setup-lib.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Extracted a typed `forward_core_event` seam that exhaustively maps
+  every variant, forwards the unchanged tagged event, and consumes emitter
+  errors. `forward_event` retains the session side effects and delegates only
+  emission; module documentation now records that boundary.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-core core_event_serializes_with_kind_tag`
   - Run: `cargo test -p opentake-core media_changed_serializes_with_kind_tag`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN. Both exact core owners and both Tauri boundary owners passed
+  1/1. The failure owner also proved a later `EventBus` observer still receives
+  the event after a simulated WebView teardown error.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. `cargo fmt --all -- --check` and
+  `cargo test --workspace --no-fail-fast` completed successfully. The only
+  diagnostic was the repository's existing future-incompatibility notice for
+  transitive `block v0.1.6`.
+
 ### Task 6: CC-edit-gesture-parity (implementation-slice-6d2ce8b116a3ccd9)
 
 **Covered records:**
@@ -463,6 +597,8 @@
 - Modify: `docs/specs/frontend/13-implementation.md`
 - Test (existing-owned): `web/src/store/editActions.test.ts#forwards swapTracks for whole-track reordering`
 - Test (reviewed-planned): `web/src/store/commandRouting.test.ts#every_edit_action_emits_exact_edit_request`
+- Test (reviewed-planned): `web/src/lib/api.editApply.test.ts#edit_apply_forwards_exact_command_envelope`
+- Test (reviewed-planned): `src-tauri/src/commands.rs#every_frontend_edit_request_deserializes_to_intended_command`
 
 **Candidate-bound contracts:**
 
@@ -486,37 +622,63 @@
   - Add request/response tests for every named success, boundary, rejection, validation, and secrecy rule; the affected Rust and TypeScript suites must pass.
   - Exercise the production IPC, MCP, or browser entry point end to end and record the exact command payload, result, and test names before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/editActions.test.ts#forwards swapTracks for whole-track reordering` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/store/commandRouting.test.ts#every_edit_action_emits_exact_edit_request` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
+  - `web/src/lib/api.editApply.test.ts#edit_apply_forwards_exact_command_envelope` (reviewed-planned) — Production Tauri invocation must retain the exact command wrapper.
+  - `src-tauri/src/commands.rs#every_frontend_edit_request_deserializes_to_intended_command` (reviewed-planned) — Native serde and command routing must cover the same exhaustive request set.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Added the exact planned Web owner plus production IPC and native
+  routing owners. The Web owner executes all 41 typed action routes, exact DTO
+  shapes, representative no-ops, and a static direct-mutation guard.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/store/editActions.test.ts -t "forwards swapTracks for whole-track reordering"`
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "every_edit_action_emits_exact_edit_request"`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced: the planned owner loaded an undefined
+  `EDIT_GESTURE_COMMAND_MATRIX`, proving no exhaustive production inventory
+  existed. Audit also found `addTexts` and `removeTracks` request variants with
+  no shared action wrapper.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/timeline/TimelineContainer.tsx#TimelineContainer`, `web/src/store/editActions.ts#buildMediaInsertPlan`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#EditRequest`, `docs/modules/web/SPEC.md`, `docs/specs/frontend/13-implementation.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Added an exhaustively typed 41-row gesture/action/request/backend
+  matrix and the missing direct action wrappers. Every low-level action emits
+  exactly one `EditRequest`, empty/same-target boundaries emit none, and the
+  obsolete sequential `editApplyMany` pseudo-transaction was removed. The
+  production IPC envelope and every Rust serde route now have focused owners;
+  both acceptance documents record the concrete evidence.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/editActions.test.ts -t "forwards swapTracks for whole-track reordering"`
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "every_edit_action_emits_exact_edit_request"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN. The existing swap owner, exhaustive Web owner, production IPC
+  owner, and 41-case native route owner each passed exactly once.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. Rust formatting, the complete Web suite (86 files / 782
+  tests), production Web build, `cargo test --workspace --no-fail-fast`, and
+  `git diff --check` all completed successfully. Only the repository's existing
+  dynamic-import/chunk-size and transitive `block v0.1.6` diagnostics remained.
+
 ### Task 7: CC-readonly-versioned-mirror (implementation-slice-dc651cd267aea077)
 
 **Covered records:**
@@ -532,6 +694,9 @@
 - Modify: `docs/specs/frontend/13-implementation.md`
 - Test (existing-owned): `web/src/store/sync.test.ts#does not let a late old snapshot replace a newer project`
 - Test (reviewed-planned): `web/src/store/commandRouting.test.ts#project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events`
+- Test (reviewed-planned): `web/src/store/sync.test.ts#refetches when an event-promised version is newer than the first snapshot`
+- Test (reviewed-planned): `web/src/store/sync.test.ts#converges to N+2 when N+1 and N+2 event refreshes complete out of order`
+- Test (reviewed-planned): `web/src/store/sync.test.ts#never publishes a stale snapshot when catch-up retries are exhausted`
 
 **Candidate-bound contracts:**
 
@@ -565,37 +730,65 @@
   - Add request/response tests for every named success, boundary, rejection, validation, and secrecy rule; the affected Rust and TypeScript suites must pass.
   - Exercise the production IPC, MCP, or browser entry point end to end and record the exact command payload, result, and test names before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/sync.test.ts#does not let a late old snapshot replace a newer project` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/store/commandRouting.test.ts#project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
+  - `web/src/store/sync.test.ts#refetches when an event-promised version is newer than the first snapshot` (reviewed-planned) — An event's version floor must force a stale first response to retry.
+  - `web/src/store/sync.test.ts#converges to N+2 when N+1 and N+2 event refreshes complete out of order` (reviewed-planned) — Concurrent edit event responses must converge to the newest authority.
+  - `web/src/store/sync.test.ts#never publishes a stale snapshot when catch-up retries are exhausted` (reviewed-planned) — Bounded retry failure must remain a deterministic no-op.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Added the exact planned store owner and three event-floor/concurrency
+  owners. Existing project-switch/history tests remain in the same runner;
+  schema and project-action suites now use only authoritative full snapshots.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/store/sync.test.ts -t "does not let a late old snapshot replace a newer project"`
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events"`
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED reproduced twice. The project Store still exposed `setMirror`,
+  and a `timeline_changed` promise for version 2 committed the first fetched
+  version-1 snapshot without retrying.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/lib.rs#forward_event`, `web/src/store/sync.ts#startSync`, `web/src/store/projectStore.ts#useProjectStore`, `docs/specs/core/4-frontend-sync.md`, `docs/specs/frontend/13-implementation.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Removed the bypass mutator. Full native/fallback snapshots now clone
+  and recursively freeze on acceptance, reject older epochs and same-project
+  versions, and preserve project identity atomically. Event-driven refreshes
+  carry an epoch/version floor, retry stale responses up to a bounded limit,
+  and publish nothing if the floor remains unmet; refresh generations make
+  concurrent N+1/N+2 responses converge only to N+2.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/sync.test.ts -t "does not let a late old snapshot replace a newer project"`
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: GREEN. Both originally named owners and all three explicit event
+  concurrency/failure owners passed. The project schema, lifecycle, and edit
+  action regression suites also passed after moving fixtures to the production
+  full-snapshot boundary.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. Rust formatting, the complete Web suite (86 files / 786
+  tests), production Web build, `cargo test --workspace --no-fail-fast`, and
+  `git diff --check` all completed successfully. Only the pre-existing build
+  diagnostics remained.
+
 ### Task 8: CC-tauri-command-contract (implementation-slice-00bdb59d43b2ad0c)
 
 **Covered records:**
@@ -712,7 +905,7 @@
   - Unknown fields, invalid frames/IDs/paths, unavailable capability, and cancellation must return typed errors without partial mutation.
   - Table-drive invoke registration/schema parity plus success/failure/undo for each mutating command and packaged desktop smoke the command surface.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/commands.rs#deserializes_camelcase_multiword_commands` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `src-tauri/src/commands.rs#deserializes_add_captions_camelcase_and_maps_to_command` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -723,7 +916,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `cargo test -p opentake-tauri deserializes_camelcase_multiword_commands`
   - Run: `cargo test -p opentake-tauri deserializes_add_captions_camelcase_and_maps_to_command`
@@ -734,11 +927,11 @@
 
   Expected: FAIL because one or more of the 7 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#EditRequest`, `src-tauri/src/commands.rs#edit_apply`, `docs/specs/core/6-tauri-commands.md`, `docs/specs/frontend/11-tauri.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri deserializes_camelcase_multiword_commands`
   - Run: `cargo test -p opentake-tauri deserializes_add_captions_camelcase_and_maps_to_command`
@@ -749,12 +942,22 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. Git history proves
+  the exhaustive Rust mapping owner, frontend invoke/handler parity owner,
+  typed error boundary, strict DTO updates, and both specification corrections
+  landed together in `f2805fc`; its parent contains neither planned owner, so
+  manufacturing a RED state would be dishonest. All six declared focused
+  owners pass on the current descendant, as do the four Node documentation
+  completion tests and the Agent-side Rust completion test. Rustfmt and the
+  full workspace gate pass, while the current full Web suite/build passed in
+  the immediately preceding control slice. No production change was required.
+
 ### Task 9: CC-authority-persistence-mixed (implementation-slice-9296b54263dc8038)
 
 **Covered records:**
@@ -801,34 +1004,44 @@
   - Exclude timeline, clips, media, credentials, transient drag/playback/dialog state, and clear or migrate malformed/old records safely.
   - Restart-test each approved key plus corrupt JSON, old schema, invalid bounds, project switch, logout, and secret scan.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/commandRouting.test.ts#rust_authority_and_ui_persistence_are_independently_owned` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "rust_authority_and_ui_persistence_are_independently_owned"`
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/sync.ts#startSync`, `web/src/store/projectStore.ts#useProjectStore`, `web/src/store/uiStore.ts#useEditorUiStore`, `docs/specs/frontend/10-state.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/commandRouting.test.ts -t "rust_authority_and_ui_persistence_are_independently_owned"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact composite
+  owner passes and proves the schema-versioned persistence allowlist, absence of
+  project identifiers from persisted values, restart defaults for transient
+  selection/playback/preview state, stale snapshot rejection, concurrent and
+  failed edit isolation, and project-boundary UI reset. Git history shows the
+  owner, persistence hardening, and corrected specification landed together in
+  `8da75f9`; the parent lacks the owner, so there is no honest historical RED to
+  replay. The current full Web suite (95 files / 832 tests) and production build
+  passed in the immediately preceding slice. No production change was required.
+
 ### Task 10: control-acceptance (implementation-slice-251a11401ef969e1)
 
 **Covered records:**
@@ -858,34 +1071,43 @@
   - Visible/accessibility/return path: success=undo the last edit: edit.undo -> backend undo -> refresh mirror/canUndo/canRedo; accessibility={"focus":"Custom HoverButton focus behavior depends on its implementation","label":"t(\"toolbar.undo\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"undo the last edit: edit.undo -> backend undo -> refresh mirror/canUndo/canRedo","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:104; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/toolbar/Toolbar.tsx:104; the candidate-specific interaction test must assert that exact guard.","disabled":"Disabled when {!canUndo}.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.undo -> backend undo -> refresh mirror/canUndo/canRedo.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:104; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-3be71cae61006e08 undo the last edit` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-3be71cae61006e08 undo the last edit"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#undo`, `web/src/lib/api.ts#undo`, `src-tauri/src/commands.rs#undo`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-3be71cae61006e08 undo the last edit"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact DOM owner
+  passes and exercises disabled no-op, one-shot pending behavior, focus
+  retention, successful completion, rejection feedback, retry readiness, and
+  the source chain through `edit.undo`, the typed API wrapper, and Rust
+  `handle_undo`. Git history shows the owner and recoverability fix landed
+  together in `99661b7`; the parent has no owner to replay as RED. The current
+  full Web/build and Rust workspace gates already pass. No production change
+  was required.
+
 ### Task 11: control-acceptance (implementation-slice-a085393217648051)
 
 **Covered records:**
@@ -915,34 +1137,42 @@
   - Visible/accessibility/return path: success=redo the last undone edit: edit.redo -> backend redo -> refresh mirror/canUndo/canRedo; accessibility={"focus":"Custom HoverButton focus behavior depends on its implementation","label":"t(\"toolbar.redo\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"redo the last undone edit: edit.redo -> backend redo -> refresh mirror/canUndo/canRedo","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:107; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/toolbar/Toolbar.tsx:107; the candidate-specific interaction test must assert that exact guard.","disabled":"Disabled when {!canRedo}.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.redo -> backend redo -> refresh mirror/canUndo/canRedo.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:107; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-b001ac6b21c97ad0 redo the last undone edit` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-b001ac6b21c97ad0 redo the last undone edit"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#redo`, `web/src/lib/api.ts#redo`, `src-tauri/src/commands.rs#redo`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-b001ac6b21c97ad0 redo the last undone edit"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact Redo DOM
+  owner passes across disabled no-op, pending duplicate suppression, focus,
+  success, failure feedback and retry while statically binding the frontend and
+  Rust command chain. The owner and recoverability fix landed together in
+  `436a30e`, and its parent lacks the owner; no artificial RED was introduced.
+  The current complete Web/build and Rust workspace gates pass. No production
+  change was required.
+
 ### Task 12: control-acceptance (implementation-slice-dc2e1dbf0bbdec19)
 
 **Covered records:**
@@ -1001,7 +1231,7 @@
   - Visible/accessibility/return path: success=change timeline zoom: logarithmic slider -> setZoomScale; accessibility={"focus":"Native keyboard-focusable control","label":"t(\"toolbar.zoom\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"change timeline zoom: logarithmic slider -> setZoomScale","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-9d69468ce3479312 switch to Pointer tool` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-8105812f9d07bc93 switch to Razor tool` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -1009,7 +1239,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-9d69468ce3479312 switch to Pointer tool"`
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-8105812f9d07bc93 switch to Razor tool"`
@@ -1017,11 +1247,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-9d69468ce3479312 switch to Pointer tool"`
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-8105812f9d07bc93 switch to Razor tool"`
@@ -1029,12 +1259,20 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. All three exact DOM
+  owners pass and prove keyboard/click tool switching, selected-state feedback,
+  focus behavior, and logarithmic zoom mapping with bounded store updates. The
+  owners were added over the existing production implementation in `186f377`;
+  its parent lacks the tests but not the behavior, so the initial honest result
+  was GREEN. The current full Web suite and production build pass. No production
+  change was required.
+
 ### Task 13: control-acceptance (implementation-slice-964535d9ff93a4e8)
 
 **Covered records:**
@@ -1065,34 +1303,41 @@
   - Visible/accessibility/return path: success=split selected clips at playhead: edit.splitAtPlayhead; accessibility={"focus":"Custom HoverButton focus behavior depends on its implementation","label":"t(\"toolbar.split\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"split selected clips at playhead: edit.splitAtPlayhead","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:136; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/toolbar/Toolbar.tsx:136; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.splitAtPlayhead.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:136; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-c96abe84259649a3 split selected clips at playhead` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-c96abe84259649a3 split selected clips at playhead"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#splitAtPlayhead`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-ops/src/command.rs`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-c96abe84259649a3 split selected clips at playhead"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact Split DOM
+  owner passes across selected and playhead-intersecting targets, no-target
+  no-op, pending duplicate suppression, error feedback, retry and the typed
+  command chain. The owner and toolbar guard fix landed together in `be4f186`;
+  its parent has no owner to replay as RED. Current Web/build and Rust workspace
+  gates pass. No production change was required.
+
 ### Task 14: control-acceptance (implementation-slice-922fa77f774ce4f6)
 
 **Covered records:**
@@ -1123,34 +1368,41 @@
   - Visible/accessibility/return path: success=trim selected clip starts to playhead: edit.trimStartToPlayhead computes left-edge trim edits for selected/intersecting clips; accessibility={"focus":"Custom GlyphButton focus behavior depends on its implementation","label":"t(\"toolbar.trimStart\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"trim selected clip starts to playhead: edit.trimStartToPlayhead computes left-edge trim edits for selected/intersecting clips","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:139; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/toolbar/Toolbar.tsx:139; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.trimStartToPlayhead computes left-edge trim edits for selected/intersecting clips.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:139; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-f38c30bc83d65d2e trim selected clip starts to playhead` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-f38c30bc83d65d2e trim selected clip starts to playhead"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#trimStartToPlayhead`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-ops/src/command.rs`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-f38c30bc83d65d2e trim selected clip starts to playhead"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact left-trim
+  owner passes across selected/intersecting target calculation, empty no-op,
+  pending suppression, error feedback, retry, focus, and the typed trim command
+  chain. The owner and guard fix landed together in `56f8da1`; its parent lacks
+  the owner. Current Web/build and Rust gates pass. No production change was
+  required.
+
 ### Task 15: control-acceptance (implementation-slice-29b311273420852d)
 
 **Covered records:**
@@ -1181,34 +1433,41 @@
   - Visible/accessibility/return path: success=trim selected clip ends to playhead: edit.trimEndToPlayhead computes right-edge trim edits for selected/intersecting clips; accessibility={"focus":"Custom GlyphButton focus behavior depends on its implementation","label":"t(\"toolbar.trimEnd\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"trim selected clip ends to playhead: edit.trimEndToPlayhead computes right-edge trim edits for selected/intersecting clips","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:144; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/toolbar/Toolbar.tsx:144; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.trimEndToPlayhead computes right-edge trim edits for selected/intersecting clips.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:144; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-eeff92d3d70361d9 trim selected clip ends to playhead` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-eeff92d3d70361d9 trim selected clip ends to playhead"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#trimEndToPlayhead`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-ops/src/command.rs`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-eeff92d3d70361d9 trim selected clip ends to playhead"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact right-trim
+  owner passes across selected/intersecting target calculation, empty no-op,
+  pending suppression, error feedback, retry, focus, and the typed trim command
+  chain. The owner and guard fix landed together in `d84009e`; its parent lacks
+  the owner. Current Web/build and Rust gates pass. No production change was
+  required.
+
 ### Task 16: control-acceptance (implementation-slice-10afd9e138d27853)
 
 **Covered records:**
@@ -1239,34 +1498,41 @@
   - Visible/accessibility/return path: success=add a text clip: edit.addTextClip inserts/selects a new top-track text clip; accessibility={"focus":"Custom GlyphButton focus behavior depends on its implementation","label":"t(\"toolbar.addText\")","shortcut":"None declared on this control"}; returnPath=["Focus remains on the toolbar control; edit commands update the editor mirror/selection."].
   - Outcome matrix: {"success":"add a text clip: edit.addTextClip inserts/selects a new top-track text clip","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/toolbar/Toolbar.tsx:150; no additional state is inferred beyond the source.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in edit.addTextClip inserts/selects a new top-track text clip.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/toolbar/Toolbar.tsx:150; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/toolbar/Toolbar.interaction.test.tsx#control-c6a658045b9e1d6c add a text clip` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-c6a658045b9e1d6c add a text clip"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/toolbar/Toolbar.tsx`, `web/src/store/editActions.ts#addTextClip`, `web/src/lib/api.ts#editApply`, `src-tauri/src/commands.rs#edit_apply`, `crates/opentake-ops/src/command.rs`, `web/src/components/toolbar/Toolbar.tsx#Toolbar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/toolbar/Toolbar.interaction.test.tsx -t "control-c6a658045b9e1d6c add a text clip"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. The exact Add Text
+  owner passes across default entry construction, pending duplicate suppression,
+  successful selection, failure feedback, retry, focus, and the typed
+  `addTextsAutoTrack` command chain. The owner and guard fix landed together in
+  `8bea548`; its parent lacks the owner. Current Web/build and Rust gates pass.
+  No production change was required.
+
 ## Shared capability references
 
 - `mcp-transport` / `implementation-slice-078ed22bfa23f28a`: implemented once in `data-safety`; this group contributes records `requirement-1990a4b0e0df5397`, `requirement-a4194cf440c740ca`, `requirement-12ca71ff2bf25b39` as acceptance references.
diff --git a/docs/audit/2026-07-14/implementation-plans/data-safety-implementation.md b/docs/audit/2026-07-14/implementation-plans/data-safety-implementation.md
index 7a7a7249..6f78adee 100644
--- a/docs/audit/2026-07-14/implementation-plans/data-safety-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/data-safety-implementation.md
@@ -38,7 +38,7 @@
   - Add deterministic fixtures for every named current, legacy, missing, malformed, and fail-closed branch; the focused round-trip and compatibility suites must pass.
   - Exercise open, edit, save, and reopen on representative bundles and attach the exact implementation symbols plus test or runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/upstream_compat.rs#applies_clip_defaults_for_omitted_fields` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-project/tests/upstream_compat.rs#migrates_legacy_transform_xy_to_center` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -47,7 +47,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project --test upstream_compat applies_clip_defaults_for_omitted_fields -- --exact`
   - Run: `cargo test -p opentake-project --test upstream_compat migrates_legacy_transform_xy_to_center -- --exact`
@@ -56,11 +56,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-project/src/bundle.rs#Project`, `crates/opentake-domain/src/clip.rs#Clip`, `crates/opentake-domain/src/media.rs#MediaManifest`, `crates/opentake-project/src/gen_log.rs#GenerationLogEntry`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test upstream_compat applies_clip_defaults_for_omitted_fields -- --exact`
   - Run: `cargo test -p opentake-project --test upstream_compat migrates_legacy_transform_xy_to_center -- --exact`
@@ -69,12 +69,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-legacy-default-matrix-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-legacy-default-matrix-real-device-2026-07-31.md). The four exact owning tests already passed at the initial baseline, so Task 1 required evidence closure and a packaged-app round trip rather than a new production patch; no artificial RED failure was introduced.
+
 ### Task 2: DS-mcp-transport (implementation-slice-078ed22bfa23f28a)
 
 **Covered records:**
@@ -101,7 +103,7 @@
   - Origin and Host DNS-rebinding guards, request-size limit, and MCP protocol-version validation are all active and independently tested.
   - HTTP integration tests prove external Host/Origin and unsupported protocol versions never invoke a tool.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/tests/mcp_http.rs#non_local_origin_is_rejected` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-agent/tests/mcp_http.rs#oversized_request_body_is_rejected` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -110,7 +112,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-agent --test mcp_http non_local_origin_is_rejected -- --exact`
   - Run: `cargo test -p opentake-agent --test mcp_http oversized_request_body_is_rejected -- --exact`
@@ -119,11 +121,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-agent/src/mcp/server.rs#McpServer`, `crates/opentake-agent/src/mcp/server.rs#serve_with_bridge`, `docs/modules/opentake-agent/SPEC.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent --test mcp_http non_local_origin_is_rejected -- --exact`
   - Run: `cargo test -p opentake-agent --test mcp_http oversized_request_body_is_rejected -- --exact`
@@ -132,12 +134,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-mcp-transport-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-mcp-transport-real-device-2026-07-31.md). The four exact owning tests already passed at the initial baseline, so Task 2 required packaged-server verification and evidence closure rather than a new production patch; no artificial RED failure was introduced.
+
 ### Task 3: DS-mcp-tool-import (implementation-slice-a5dcb81bd0966174)
 
 **Covered records:**
@@ -166,7 +170,7 @@
   - Reject non-HTTPS/userinfo/redirect-to-non-HTTPS URLs before I/O; infer or validate the extension/MIME allowlist; stream to a staging file while enforcing the 1 GB decoded-byte cap across redirects.
   - Publish only after download, type/probe, and retained-project validation; cancellation/error cleans staging and leaves manifest unchanged.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/src/mcp/dispatch.rs#import_media_requires_exactly_one_source` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-agent/src/mcp/dispatch.rs#import_media_rejects_unknown_nested_source_key` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -176,7 +180,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-agent import_media_requires_exactly_one_source`
   - Run: `cargo test -p opentake-agent import_media_rejects_unknown_nested_source_key`
@@ -186,11 +190,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-agent/src/tools/errors.rs#decode_tool_args`, `crates/opentake-agent/src/mcp/dispatch.rs#Dispatcher`, `src-tauri/src/mcp.rs#TauriMediaBridge`, `docs/modules/opentake-agent/SPEC.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent import_media_requires_exactly_one_source`
   - Run: `cargo test -p opentake-agent import_media_rejects_unknown_nested_source_key`
@@ -200,12 +204,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-mcp-tool-import-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-mcp-tool-import-real-device-2026-07-31.md). The initial exact argument-matrix command executed zero tests because its owning test had an extra suffix; the test was renamed to the plan-declared contract and then passed 1/1. Production import guards were already complete, and the packaged server passed path, bytes, HTTPS, rejection, persistence, and UI checks.
+
 ### Task 4: DS-mcp-redaction (implementation-slice-673f9e3f6002f97b)
 
 **Covered records:**
@@ -228,34 +234,36 @@
   - Introduce a boundary sanitizer with typed safe error codes/details and private structured logging.
   - Adversarial tests inject a home path, API key, bearer token, signed URL query, provider body, and nested source error and assert none appear in MCP content while remediation remains actionable.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/tests/mcp_error_redaction.rs#llm_errors_redact_paths_credentials_headers_provider_bodies` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-agent --test mcp_error_redaction llm_errors_redact_paths_credentials_headers_provider_bodies -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/mcp.rs#TauriMediaBridge`, `crates/opentake-agent/src/mcp/convert.rs#to_call_tool_result`, `docs/modules/opentake-agent/SPEC.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent --test mcp_error_redaction llm_errors_redact_paths_credentials_headers_provider_bodies -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-mcp-redaction-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-mcp-redaction-real-device-2026-07-31.md). The exact owning matrix already passed at the initial baseline; the packaged MCP server independently proved adversarial path, credential, authorization, signed-query, and provider-style strings never reached response content.
+
 ### Task 5: DS-generation-seed (implementation-slice-4f2d8bcaff47a37f)
 
 **Covered records:**
@@ -292,37 +300,39 @@
   - Add deterministic fixtures for every named current, legacy, missing, malformed, and fail-closed branch; the focused round-trip and compatibility suites must pass.
   - Exercise open, edit, save, and reopen on representative bundles and attach the exact implementation symbols plus test or runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/roundtrip.rs#malformed_generation_log_is_ignored` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-core/tests/project_open.rs#missing_generation_log_seeds_manifest_provenance_once` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project --test roundtrip malformed_generation_log_is_ignored -- --exact`
   - Run: `cargo test -p opentake-core --test project_open missing_generation_log_seeds_manifest_provenance_once -- --exact`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-project/src/bundle.rs#Project`, `crates/opentake-core/src/session.rs#EditorSession`, `docs/modules/opentake-core/SPEC.md`, `docs/specs/core/5-assembly.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test roundtrip malformed_generation_log_is_ignored -- --exact`
   - Run: `cargo test -p opentake-core --test project_open missing_generation_log_seeds_manifest_provenance_once -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-generation-seed-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-generation-seed-real-device-2026-07-31.md). Both exact owning tests already passed at the initial baseline; the packaged application additionally proved missing-log seed, duplicate-provenance collapse, edit/save/reopen, and byte-stable idempotence.
+
 ### Task 6: DS-cache-identity-complete (implementation-slice-5af4f1ababc7b495)
 
 **Covered records:**
@@ -352,7 +362,7 @@
   - Visible/returned assertion: assert the exact success payload for the valid case and a stable typed error for the invalid case, including zero partial side effects and no leaked internal path or credential.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_1cb2f0539425a14e.rs#completion_1cb2f0539425a14e_derive_a_stable_lowercase_32_hex_file_identity_f.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/src/cache_key.rs#identity_hex_is_stable_and_lowercase` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-media/src/cache_key.rs#identity_hex_matches_swift_for_whole_second_mtime` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -360,7 +370,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media identity_hex_is_stable_and_lowercase`
   - Run: `cargo test -p opentake-media identity_hex_matches_swift_for_whole_second_mtime`
@@ -368,11 +378,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/cache_key.rs#file_identity_key`, `crates/opentake-media/src/cache_key.rs#identity_hex`, `docs/modules/opentake-media/SPEC.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media identity_hex_is_stable_and_lowercase`
   - Run: `cargo test -p opentake-media identity_hex_matches_swift_for_whole_second_mtime`
@@ -380,12 +390,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence: [`data-safety-cache-identity-real-device-2026-07-31.md`](../runtime-artifacts/automated/data-safety-cache-identity-real-device-2026-07-31.md). The three exact owning tests already passed at baseline; a packaged-app waveform cache filename also matched an independent Foundation/CryptoKit calculation for the same real file byte-for-byte.
+
 ### Task 7: DS-shared-core-command-complete (implementation-slice-63ec0e639957e775)
 
 **Covered records:**
@@ -554,7 +566,7 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:tools/completion-tests/doc-c95515ae8f048e8a.test.mjs#completion_c95515ae8f048e8a_editor_state_and_edits_are_owned_by_the_shared_r.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-ops/src/editor_state.rs#commit_undo_redo_cycle_restores_and_versions` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-core/src/core.rs#apply_bumps_version_and_emits_once` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -563,7 +575,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-ops commit_undo_redo_cycle_restores_and_versions`
   - Run: `cargo test -p opentake-core apply_bumps_version_and_emits_once`
@@ -572,11 +584,11 @@
 
   Expected: FAIL because one or more of the 10 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-ops/src/editor_state.rs#EditorState`, `crates/opentake-ops/src/command.rs#EditCommand`, `crates/opentake-core/src/core.rs#AppCore`, `crates/opentake-core/src/events.rs#EventBus`, `docs/specs/core/1-editor-state.md`, `docs/specs/core/2-command-routing.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-ops commit_undo_redo_cycle_restores_and_versions`
   - Run: `cargo test -p opentake-core apply_bumps_version_and_emits_once`
@@ -585,7 +597,7 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -667,7 +679,7 @@
   - On every pre-commit failure, drop prepared capabilities, restore acquired transitions, publish no usable session, and preserve all project files unchanged.
   - Fault-inject the owned failure boundaries and assert cleanup/event order, then open/save/reopen valid and migrated fixtures with identical IDs, frames, media, and generation history.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/upstream_compat.rs#exhaustive_legacy_default_matrix` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `crates/opentake-core/tests/project_open.rs#missing_generation_log_seeds_manifest_provenance_once` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
@@ -681,7 +693,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project --test upstream_compat exhaustive_legacy_default_matrix -- --exact`
   - Run: `cargo test -p opentake-core --test project_open missing_generation_log_seeds_manifest_provenance_once -- --exact`
@@ -695,11 +707,11 @@
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only the files listed for Task 8 as required to satisfy every listed acceptance criterion, including atomic combined reads, visible success, and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test upstream_compat exhaustive_legacy_default_matrix -- --exact`
   - Run: `cargo test -p opentake-core --test project_open missing_generation_log_seeds_manifest_provenance_once -- --exact`
@@ -713,7 +725,7 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -748,14 +760,14 @@
   - Add deterministic fixtures for every named current, legacy, missing, malformed, and fail-closed branch; the focused round-trip and compatibility suites must pass.
   - Exercise open, edit, save, and reopen on a complete current version-2 bundle. Prove every rejected open/save leaves the full nofollow bundle tree unchanged, and prove rejected Save As creates no destination, journal, staging, symlink, or other sibling artifact.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/roundtrip.rs#malformed_manifest_is_an_error` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-project/tests/schema_compat.rs#malformed_manifest_contract_matches_authoritative_source` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project --test roundtrip malformed_manifest_is_an_error -- --exact`
   - Run: `cargo test -p opentake-project --test schema_compat malformed_manifest_contract_matches_authoritative_source -- --exact`
@@ -763,20 +775,20 @@
   Expected: the existing round-trip smoke passes, while the reviewed-planned
   schema contract is absent (`running 0 tests`), so the gate is not satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Add the missing owning test and reconcile the comments/spec/plan in the files
   listed for Task 9. Do not change the already-correct `Project` or
   `MediaManifest` runtime behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test roundtrip malformed_manifest_is_an_error -- --exact`
   - Run: `cargo test -p opentake-project --test schema_compat malformed_manifest_contract_matches_authoritative_source -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -1040,13 +1052,18 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
   - Acquisition, DACL checks, I/O, quarantine, no-replace publish, cleanup, reparse-point, source-swap, and cancellation regressions pass on native Windows.
   - The x86_64-pc-windows-msvc build, warnings-denied clippy, repository Windows jobs, and independent review all pass for the exact tree.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/src/safe_fs/tests.rs#windows_contract` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `crates/opentake-project/src/safe_fs/tests.rs#synchronous_nt_pending_is_invariant_error` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
+  Result: Both exact names now execute in the common owning runner on native
+  Windows. Adapter-local tests cover DACL bounds and malformed descriptors,
+  retained I/O, rollback, quarantine, no-replace publish, recursive reparse
+  cleanup, and source-name rebinding resistance.
+
 - [ ] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project windows_contract`
@@ -1054,17 +1071,29 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-project/src/safe_fs/capability.rs#DirectoryAuthority`, `crates/opentake-project/src/safe_fs/ops.rs#capture_absolute_directory`, `docs/superpowers/plans/c1b/2026-07-12-c1b-windows-ci-normative.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: `windows.rs` is a compile-complete retained-HANDLE backend with
+  capability-relative no-follow acquisition, synchronous NT status handling,
+  owner-only security descriptors, I/O, quarantine, no-replace publish, and
+  non-traversing cleanup. It contains no unsupported-backend include or bypass
+  implementation.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project windows_contract`
   - Run: `cargo test -p opentake-project synchronous_nt_pending_is_invariant_error`
 
   Expected: PASS with every candidate-bound assertion executed.
 
+  Result: Native Windows run 30617000877, job 91112395644, executed 26 safe-fs
+  tests: 26 passed, 0 failed. Formatting, warnings-denied native clippy, and the
+  archive-security integration suite also exited zero. The immutable receipt is
+  recorded in
+  `runtime-artifacts/automated/data-safety-windows-safe-fs-native-2026-07-31.md`.
+
 - [ ] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
@@ -1152,7 +1181,7 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:tools/completion-tests/doc-bf6666ce4bc65294.test.mjs#completion_bf6666ce4bc65294_resolve_media_ref_to_an_expected_path_while_dist.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-domain/src/media.rs#resolver_expected_path_external` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `src-tauri/src/media.rs#dto_reports_file_size_for_present_source` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -1160,7 +1189,12 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: The three reviewed Rust owners remain at their declared symbols, and
+  `tools/completion-tests/doc-bf6666ce4bc65294.test.mjs` now binds them under
+  the exact generated completion-test name. The runner rejects a zero-test
+  filter by requiring each Cargo invocation to report exactly one passing test.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-domain resolver_expected_path_external`
   - Run: `cargo test -p opentake-tauri dto_reports_file_size_for_present_source`
@@ -1168,11 +1202,22 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: The product behavior predated this generated completion slice, so the
+  honest missing-evidence RED was the absent declared completion-test path; the
+  required `node --test tools/completion-tests/doc-bf6666ce4bc65294.test.mjs`
+  entry point could not run. No product regression was manufactured.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/media.rs#MediaResolver`, `src-tauri/src/media.rs#relink_media`, `docs/upstream-analysis/01-架构与数据流.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: The reviewed implementation already resolved external and
+  project-relative sources, derived present/offline state from the filesystem,
+  and relinked an offline asset in place while preserving its ID. The missing
+  work was the deterministic evidence bridge; no production-code change was
+  needed.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-domain resolver_expected_path_external`
   - Run: `cargo test -p opentake-tauri dto_reports_file_size_for_present_source`
@@ -1180,8 +1225,17 @@ before namespace mutation; downstream algorithm tests use test-only trusted fixt
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: `node --test
+  tools/completion-tests/doc-bf6666ce4bc65294.test.mjs` passed 1/1. Its three
+  exact Cargo filters each executed one owner and passed, covering expected-path
+  resolution, present-source size/state, and offline-to-present relink with a
+  stable media ID.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
+
+  Result: `cargo fmt --all -- --check && cargo test --workspace
+  --no-fail-fast` passed on the exact local tree.
diff --git a/docs/audit/2026-07-14/implementation-plans/home-shell-implementation.md b/docs/audit/2026-07-14/implementation-plans/home-shell-implementation.md
index 58af4d3c..44e8d370 100644
--- a/docs/audit/2026-07-14/implementation-plans/home-shell-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/home-shell-implementation.md
@@ -34,34 +34,36 @@
   - Add browser interaction tests for every named Home, project, persistence, error, keyboard, and state transition; the affected web and Rust suites must pass.
   - Exercise the packaged application through create/open/close/reopen or the named Home path and retain exact runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/home/HomeView.test.tsx#upstream_home_children_close_one_composite_acceptance` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "upstream_home_children_close_one_composite_acceptance"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx#HomeView`, `web/src/store/recentStore.ts#useRecentStore`, `web/src/store/projectActions.ts#openProjectPath`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "upstream_home_children_close_one_composite_acceptance"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The missing exact composite runner first produced a zero-candidate skipped RED baseline, then passed 1/1 after the Home boundary covered sidebar, samples, first-run welcome, version update, project-card keyboard open, missing/context state, and safe-trash confirmation. Welcome/update state uses the build-time application version, persists only after dismissal, receives initial focus, and supports Escape. The complete Web suite passed 82 files / 774 tests and the production build passed with only the pre-existing bundle warnings. The rebuilt macOS app displayed the v1.0.0 update surface, returned to the complete Home shell, and did not redisplay it after quit/relaunch; child runtime records cover native new/open/sample, safe trash, autosave/reopen, and secondary controls. Runtime evidence: [`home-upstream-composite-real-device-2026-07-31.md`](../runtime-artifacts/automated/home-upstream-composite-real-device-2026-07-31.md).
+
 ### Task 2: HS-new-open-sample (implementation-slice-406b2853a5d6f67b)
 
 **Covered records:**
@@ -89,37 +91,39 @@
   - Add browser interaction tests for every named Home, project, persistence, error, keyboard, and state transition; the affected web and Rust suites must pass.
   - Exercise the packaged application through create/open/close/reopen or the named Home path and retain exact runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/samples.rs#failed_materialization_rolls_back_entire_sample_directory` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `web/src/components/home/HomeView.test.tsx#new_open_sample_register_only_after_success_and_route_tutorial` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri failed_materialization_rolls_back_entire_sample_directory`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "new_open_sample_register_only_after_success_and_route_tutorial"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx#HomeView`, `web/src/store/projectActions.ts#newProjectAndEnter`, `web/src/store/projectActions.ts#openProjectPath`, `web/src/store/projectActions.ts#openProjectViaDialog`, `src-tauri/src/samples.rs#SampleProjectService`, `docs/architecture/MODULE-PORT-MAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri failed_materialization_rolls_back_entire_sample_directory`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "new_open_sample_register_only_after_success_and_route_tutorial"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime evidence: [`home-sample-project-real-device-2026-07-31.md`](../runtime-artifacts/automated/home-sample-project-real-device-2026-07-31.md).
+
 ### Task 3: HS-project-card-lifecycle (implementation-slice-1136a3fb2728f04d)
 
 **Covered records:**
@@ -145,37 +149,39 @@
   - Add browser interaction tests for every named Home, project, persistence, error, keyboard, and state transition; the affected web and Rust suites must pass.
   - Exercise the packaged application through create/open/close/reopen or the named Home path and retain exact runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/home.rs#missing_entry_survives_registry_load_and_safe_trash_removes_only_after_success` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `web/src/components/home/HomeView.test.tsx#missing_card_reveal_remove_and_trash_states` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri missing_entry_survives_registry_load_and_safe_trash_removes_only_after_success`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "missing_card_reveal_remove_and_trash_states"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/home.rs#ProjectRegistry`, `web/src/store/recentStore.ts#useRecentStore`, `web/src/components/home/HomeView.tsx#ProjectGridCard`, `docs/architecture/PORT-1TO1-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri missing_entry_survives_registry_load_and_safe_trash_removes_only_after_success`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.test.tsx -t "missing_card_reveal_remove_and_trash_states"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime evidence: [`home-project-lifecycle-real-device-2026-07-31.md`](../runtime-artifacts/automated/home-project-lifecycle-real-device-2026-07-31.md).
+
 ### Task 4: HS-autosave-metadata-mixed (implementation-slice-c50679ed41628b06)
 
 **Covered records:**
@@ -199,34 +205,36 @@
   - Add browser interaction tests for every named Home, project, persistence, error, keyboard, and state transition; the affected web and Rust suites must pass.
   - Exercise the packaged application through create/open/close/reopen or the named Home path and retain exact runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/recentStore.test.ts#autosave_and_home_metadata_have_separate_owners` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/store/recentStore.test.ts -t "autosave_and_home_metadata_have_separate_owners"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/recentStore.ts#useRecentStore`, `web/src/store/projectActions.ts#saveCurrentProject`, `docs/architecture/PORT-1TO1-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/recentStore.test.ts -t "autosave_and_home_metadata_have_separate_owners"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime evidence: [`home-autosave-metadata-real-device-2026-07-31.md`](../runtime-artifacts/automated/home-autosave-metadata-real-device-2026-07-31.md).
+
 ### Task 5: HS-layout-geometry + CC-layout-misgrouped (implementation-slice-395babc4fe771bb4)
 
 **Covered records:**
@@ -391,29 +399,29 @@
   - Visible/returned assertion: assert the exact visible text/control/state/focus result and the returned success or typed failure, including a no-op assertion for disabled, cancelled, or rejected input.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:web/src/__tests__/completion/doc-59fbdae28c9200a7.test.ts#completion_59fbdae28c9200a7_the_editor_shell_implements_the_specified_panel_.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/EditorSplit.test.tsx#all_presets_match_geometry_visibility_maximize_and_focus_shell` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/EditorSplit.test.tsx -t "all_presets_match_geometry_visibility_maximize_and_focus_shell"`
 
   Expected: FAIL because one or more of the 10 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/uiStore.ts#useEditorUiStore`, `web/src/components/shell/EditorSplit.tsx#EditorSplit`, `web/src/components/shell/EditorSplit.tsx#DefaultLayout`, `web/src/components/shell/EditorSplit.tsx#MediaLayout`, `web/src/components/shell/EditorSplit.tsx#VerticalLayout`, `web/src/components/ui/PanelShell.tsx#PanelShell`, `docs/modules/web/SPEC.md`, `web/src/components/shell/ViewMenu.tsx#ViewMenu`, `docs/specs/frontend/2-layout.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/EditorSplit.test.tsx -t "all_presets_match_geometry_visibility_maximize_and_focus_shell"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
@@ -455,29 +463,29 @@
   - Add browser interaction tests for every named Home, project, persistence, error, keyboard, and state transition; the affected web and Rust suites must pass.
   - Exercise the packaged application through create/open/close/reopen or the named Home path and retain exact runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/store/uiStore.persistence.test.ts#schema_safe_layout_panel_and_keyframe_state_survive_restart` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/store/uiStore.persistence.test.ts -t "schema_safe_layout_panel_and_keyframe_state_survive_restart"`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/store/uiStore.ts#loadBool`, `web/src/store/uiStore.ts#loadPreset`, `web/src/store/uiStore.ts#persist`, `web/src/store/uiStore.ts#useEditorUiStore`, `docs/modules/web/SPEC.md`, `docs/specs/frontend/13-implementation.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/store/uiStore.persistence.test.ts -t "schema_safe_layout_panel_and_keyframe_state_survive_restart"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
@@ -506,29 +514,29 @@
   - Match shortcut, enabled, checked, and focus behavior.
   - Add menu action and packaged desktop tests.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ViewMenu.test.tsx#commands_shortcuts_checked_state_and_disabled_rules` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.test.tsx -t "commands_shortcuts_checked_state_and_disabled_rules"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/ViewMenu.tsx#ViewMenu`, `web/src/store/uiStore.ts#useEditorUiStore`, `docs/specs/frontend/2-layout.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.test.tsx -t "commands_shortcuts_checked_state_and_disabled_rules"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
@@ -558,34 +566,36 @@
   - Wire each component to live commands/state.
   - Add component-map and visual acceptance coverage.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ShellComponentMapping.test.tsx#every_documented_shell_component_has_exact_owner` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ShellComponentMapping.test.tsx -t "every_documented_shell_component_has_exact_owner"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx#HomeView`, `web/src/components/shell/EditorSplit.tsx#EditorSplit`, `web/src/components/shell/ViewMenu.tsx#ViewMenu`, `docs/specs/frontend/3-components.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ShellComponentMapping.test.tsx -t "every_documented_shell_component_has_exact_owner"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. Added the executable component-owner index and completed the missing AI Edit, Music, and cross-dissolve transition vertical slices through shared project commands/state. The complete Web suite passed 82 files / 773 tests, the production Web build passed with only the pre-existing chunk/dynamic-import warnings, the complete Rust workspace passed, and formatting plus diff checks passed. The rebuilt macOS application verified linked A/V selection, AI proposal/reject/apply/undo, project and library music placement, paid-generation confirmation handoff, transition apply/remove/undo, save/reopen persistence, and a parseable 720p H.264/AAC export. Runtime evidence: [`home-component-mapping-real-device-2026-07-31.md`](../runtime-artifacts/automated/home-component-mapping-real-device-2026-07-31.md).
+
 ### Task 9: control-acceptance (implementation-slice-60d775675af9091c)
 
 **Covered records:**
@@ -651,7 +661,7 @@
   - Visible/accessibility/return path: success=create a new project from the populated launcher: newProjectAndEnter enters a fresh editor project; accessibility={"focus":"Custom LauncherButton focus behavior depends on its implementation","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Project actions enter the editor; Library/Settings provide explicit Home/close actions."].
   - Outcome matrix: {"success":"create a new project from the populated launcher: newProjectAndEnter enters a fresh editor project","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/home/HomeView.tsx:421; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/home/HomeView.tsx:421; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in newProjectAndEnter enters a fresh editor project.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/home/HomeView.tsx:421; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/home/HomeView.interaction.test.tsx#control-e2d0f1ed3415ea45 create a new project from the Home sidebar` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/home/HomeView.interaction.test.tsx#control-575978f9bced5959 create a new project from the empty launcher` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -659,7 +669,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-e2d0f1ed3415ea45 create a new project from the Home sidebar"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-575978f9bced5959 create a new project from the empty launcher"`
@@ -667,11 +677,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx`, `web/src/store/projectActions.ts#newProjectAndEnter`, `web/src/lib/api.ts#getDefaultProjectDir`, `src-tauri/src/commands.rs#get_default_project_dir`, `web/src/lib/api.ts#projectNew`, `src-tauri/src/commands.rs#project_new`, `crates/opentake-core/src/dto.rs#handle_project_new`, `crates/opentake-core/src/core.rs`, `web/src/components/home/HomeView.tsx#HomeView` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-e2d0f1ed3415ea45 create a new project from the Home sidebar"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-575978f9bced5959 create a new project from the empty launcher"`
@@ -679,7 +689,7 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -749,7 +759,7 @@
   - Visible/accessibility/return path: success=open a project from the populated launcher: sets opening while openProjectViaDialog runs; accessibility={"focus":"Custom LauncherButton focus behavior depends on its implementation","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Project actions enter the editor; Library/Settings provide explicit Home/close actions."].
   - Outcome matrix: {"success":"open a project from the populated launcher: sets opening while openProjectViaDialog runs","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/home/HomeView.tsx:422; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/home/HomeView.tsx:422; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in sets opening while openProjectViaDialog runs; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in sets opening while openProjectViaDialog runs.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/home/HomeView.tsx:422; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/home/HomeView.interaction.test.tsx#control-ef78873f98fcab84 open a project from the Home sidebar` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/home/HomeView.interaction.test.tsx#control-2121d7b9fdc279b9 open a project from the empty launcher` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -757,7 +767,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-ef78873f98fcab84 open a project from the Home sidebar"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-2121d7b9fdc279b9 open a project from the empty launcher"`
@@ -765,11 +775,11 @@
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx`, `web/src/store/projectActions.ts#openProjectViaDialog`, `web/src/store/projectActions.ts#openProjectPath`, `web/src/lib/api.ts#projectOpen`, `src-tauri/src/commands.rs#project_open`, `crates/opentake-core/src/core.rs#AppCore::prepare_project_open`, `web/src/components/home/HomeView.tsx#HomeView`, `crates/opentake-core/src/core.rs#AppCore` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-ef78873f98fcab84 open a project from the Home sidebar"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-2121d7b9fdc279b9 open a project from the empty launcher"`
@@ -777,7 +787,7 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -857,7 +867,7 @@
   - Visible/accessibility/return path: success=remove a recent project entry: recentStore.remove(entry.path); accessibility={"focus":"Native keyboard-focusable control","label":"t(\"home.remove\")","shortcut":"None declared on this control"}; returnPath=["Project actions enter the editor; Library/Settings provide explicit Home/close actions."].
   - Outcome matrix: {"success":"remove a recent project entry: recentStore.remove(entry.path)","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/home/HomeView.tsx:521; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/home/HomeView.interaction.test.tsx#control-f4a6b4f8789ea013 open the global Library from Home` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/home/HomeView.interaction.test.tsx#control-810a7d793fcd8323 open Settings from Home` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -866,7 +876,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-f4a6b4f8789ea013 open the global Library from Home"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-810a7d793fcd8323 open Settings from Home"`
@@ -875,11 +885,15 @@
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: The file existed only because Task 12 had just introduced it, but all four Task 11 names were absent; the focused filter executed zero candidates and reported the file/test as skipped. This is the missing-owning-evidence baseline rather than a manufactured production failure.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx`, `web/src/components/home/HomeView.tsx#HomeView` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Existing Library, Settings, background-clear, and recent-store removal handlers already satisfied the four contracts. Added the four exact owning tests; no further product code change was required after Task 12 made the card and removal control natively accessible.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-f4a6b4f8789ea013 open the global Library from Home"`
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-810a7d793fcd8323 open Settings from Home"`
@@ -888,12 +902,16 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: PASS, all four exact candidate tests executed in the 5/5 Home interaction runner.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS, 72 Web files / 731 tests and production build. The packaged macOS app opened Library and Settings, selected then cleared a project card, removed only the recent entry while preserving the bundle, and reopened the bundle to restore the 2-entry Home state. Runtime evidence: `runtime-artifacts/automated/home-secondary-controls-real-device-2026-07-30.md`.
+
 ### Task 12: control-acceptance (implementation-slice-8e481b772d7d2357)
 
 **Covered records:**
@@ -926,34 +944,42 @@
   - Visible/accessibility/return path: success=select or open a recent project card: onClick stops propagation and setSelectedPath(entry.path); onDoubleClick calls openProjectPath(entry.path); the launcher window Enter branch opens selectedPath; accessibility={"focus":"ProjectGridCard call site supplies pointer handlers; the implementation div is not keyboard focusable even though a window-level Enter handler exists","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Project actions enter the editor; Library/Settings provide explicit Home/close actions."].
   - Outcome matrix: {"success":"select or open a recent project card: onClick stops propagation and setSelectedPath(entry.path); onDoubleClick calls openProjectPath(entry.path); the launcher window Enter branch opens selectedPath","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/home/HomeView.tsx:351; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/home/HomeView.tsx:351; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in onClick stops propagation and setSelectedPath(entry.path); onDoubleClick calls openProjectPath(entry.path); the launcher window Enter branch opens selectedPath; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in onClick stops propagation and setSelectedPath(entry.path); onDoubleClick calls openProjectPath(entry.path); the launcher window Enter branch opens selectedPath.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/home/HomeView.tsx:351; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/home/HomeView.interaction.test.tsx#control-9697b53d4d2cf1ca select or open a recent project card` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-9697b53d4d2cf1ca select or open a recent project card"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: RED. The declared owning runner did not exist, and the direct focused Vitest command exited 1 with `No test files found`. The first packaged-app inspection also exposed the existing card as text rather than a keyboard-focusable action.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/home/HomeView.tsx`, `web/src/components/home/HomeView.tsx#ProjectLauncher`, `web/src/store/projectActions.ts#openProjectPath`, `web/src/lib/api.ts#projectOpen`, `src-tauri/src/commands.rs#project_open`, `crates/opentake-core/src/core.rs#AppCore::prepare_project_open`, `web/src/components/home/HomeView.tsx#HomeView`, `crates/opentake-core/src/core.rs#AppCore` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Replaced the pointer-only card surface with a real focusable button carrying the project name and `aria-pressed` selection state. Kept the remove action as a separate sibling button, while preserving single-click selection, double-click open, focus selection, and the launcher-level Enter/Return open path. The global Return handler now ignores other focused interactive controls so it cannot open a stale selected project while activating another Home action.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/home/HomeView.interaction.test.tsx -t "control-9697b53d4d2cf1ca select or open a recent project card"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: PASS, 1/1 exact candidate test. The nearby Home visual suite also passed 11/11.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The complete Web suite passed 72 files / 727 tests, the production Web build passed with only the pre-existing bundle warnings, and the complete Rust workspace passed. The rebuilt packaged macOS app verified single-click selection, native keyboard focus plus Return, and native double-click opening the same project. Runtime evidence: `runtime-artifacts/automated/recent-project-card-real-device-2026-07-30.md`.
+
 ### Task 13: control-acceptance (implementation-slice-1f94f01d3b65a701)
 
 **Covered records:**
@@ -1076,7 +1102,7 @@
   - Visible/accessibility/return path: success=open Video Export from the interchange menu: close menu -> open Export dialog; accessibility={"focus":"Native keyboard-focusable control","label":"menuitem","shortcut":"None declared on this control"}; returnPath=["Navigation changes the full-screen view; popup actions should close and return focus to the title-bar trigger."].
   - Outcome matrix: {"success":"open Video Export from the interchange menu: close menu -> open Export dialog","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/TitleBar.tsx:359; the candidate-specific interaction test must assert that exact guard.","disabled":"Disabled when {!hasClips}.","cancel":"Cancellation/dismissal follows the exact guard in close menu -> open Export dialog; no broader cancellation behavior is assumed.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/TitleBar.interaction.test.tsx#control-f52cc89817361a19 return from editor to Home` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/shell/TitleBar.interaction.test.tsx#control-4bda8f075e1f3a14 open the global Library` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -1088,7 +1114,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify the baseline**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-f52cc89817361a19 return from editor to Home"`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-4bda8f075e1f3a14 open the global Library"`
@@ -1098,13 +1124,15 @@
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-229710d0115f07bc open/close interchange export menu"`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-02d1bf7fff7c1e3a open Video Export from the interchange menu"`
 
-  Expected: FAIL because one or more of the 7 candidate-bound contracts are not yet satisfied.
+  Observed: all seven production controls already existed. The exact owning tests were absent, so the new candidate-bound tests passed against the existing implementation without introducing an artificial production failure.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/TitleBar.tsx`, `web/src/components/shell/TitleBar.tsx#TitleBar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Observed: production code required no change. The owning test now covers all seven planned controls, including empty-timeline video-export disablement and both Escape and outside-click menu dismissal.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-f52cc89817361a19 return from editor to Home"`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-4bda8f075e1f3a14 open the global Library"`
@@ -1116,12 +1144,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS, 70 files / 715 web tests. See `docs/audit/2026-07-14/runtime-artifacts/automated/titlebar-controls-real-device-2026-07-30.md` for the real application loop.
+
 ### Task 14: control-acceptance (implementation-slice-2e210a4b1ab6c5e9)
 
 **Covered records:**
@@ -1154,34 +1184,38 @@
   - Visible/accessibility/return path: success=export SRT or VTT subtitles: close menu -> save dialog -> done/empty/failure toast; accessibility={"focus":"Native keyboard-focusable control","label":"menuitem","shortcut":"None declared on this control"}; returnPath=["Navigation changes the full-screen view; popup actions should close and return focus to the title-bar trigger."].
   - Outcome matrix: {"success":"export SRT or VTT subtitles: close menu -> save dialog -> done/empty/failure toast","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/shell/TitleBar.tsx:289; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/TitleBar.tsx:289; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in close menu -> save dialog -> done/empty/failure toast; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in close menu -> save dialog -> done/empty/failure toast.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/shell/TitleBar.tsx:289; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/TitleBar.interaction.test.tsx#control-f54f4037ab7bffbe export SRT or VTT subtitles` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify the baseline**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-f54f4037ab7bffbe export SRT or VTT subtitles"`
 
-  Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
+  Observed: the production UI/API/Tauri slice already existed, so the newly registered owning test passed immediately. No artificial production failure was introduced; the missing deliverable was exact owning evidence.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/TitleBar.tsx`, `web/src/components/shell/TitleBar.tsx#onExportSubtitles`, `web/src/lib/api.ts#getDefaultProjectDir`, `src-tauri/src/commands.rs`, `web/src/lib/api.ts#exportSubtitles`, `src-tauri/src/commands.rs#export_subtitles`, `crates/opentake-domain/src/subtitle_export.rs#export_srt`, `web/src/components/shell/TitleBar.tsx#TitleBar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Observed: production code required no change. The owning DOM test now covers SRT/VTT success, zero-cue empty state, write failure, user cancellation, default-directory fallback, extension completion, and typed API arguments.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-f54f4037ab7bffbe export SRT or VTT subtitles"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. See `docs/audit/2026-07-14/runtime-artifacts/automated/subtitle-export-real-device-2026-07-30.md` for the native title-bar/save-panel run and generated-file validation.
+
 ### Task 15: control-acceptance (implementation-slice-a85196307f399399)
 
 **Covered records:**
@@ -1214,34 +1248,44 @@
   - Visible/accessibility/return path: success=export XMEML/FCPXML/OTIO/EDL: close menu -> save dialog -> format command -> success/failure toast; accessibility={"focus":"Native keyboard-focusable control","label":"menuitem","shortcut":"None declared on this control"}; returnPath=["Navigation changes the full-screen view; popup actions should close and return focus to the title-bar trigger."].
   - Outcome matrix: {"success":"export XMEML/FCPXML/OTIO/EDL: close menu -> save dialog -> format command -> success/failure toast","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/shell/TitleBar.tsx:396; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/TitleBar.tsx:396; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in close menu -> save dialog -> format command -> success/failure toast; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in close menu -> save dialog -> format command -> success/failure toast.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/shell/TitleBar.tsx:396; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/TitleBar.interaction.test.tsx#control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+  Result: Added the exact planned control test for XMEML, FCPXML, OTIO, and EDL, plus failure, cancellation, default-directory, extension, menu-dismissal, and macOS 26 native-dialog compatibility coverage.
+
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: The production interchange routes already existed, so the initial owning test passed rather than manufacturing an artificial RED. Real-device verification then supplied the missing failure evidence: EDL selected caption overlays as `Offline`, and the native extension filter disabled Save on macOS 26.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/TitleBar.tsx`, `web/src/components/shell/TitleBar.tsx#INTERCHANGE_FORMATS`, `web/src/lib/api.ts#getDefaultProjectDir`, `src-tauri/src/commands.rs`, `web/src/lib/api.ts`, `src-tauri/src/commands.rs#selected`, `crates/opentake-project/src/fcpxml.rs#export_xmeml`, `web/src/components/shell/TitleBar.tsx#TitleBar` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Result: Preserved the project-derived save path while avoiding the incompatible macOS native filter, and corrected EDL to skip text/Lottie overlays in favor of actual video/image clips. See `docs/audit/2026-07-14/runtime-artifacts/automated/interchange-export-real-device-2026-07-30.md`.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.interaction.test.tsx -t "control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Result: PASS. The repository web suite passed 70 files / 721 tests, including all six exact interchange-control cases; the EDL module passed 14/14 focused tests.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The full Rust workspace, warnings-denied workspace clippy, web build, formatting, and diff checks completed successfully. The rebuilt macOS application exported and parsed all four formats, and the corrected three-event EDL was deterministic.
+
 ### Task 16: control-acceptance (implementation-slice-4a4cd45e11211989)
 
 **Covered records:**
@@ -1332,7 +1376,7 @@
   - Visible/accessibility/return path: success=toggle the Inspector panel: toggleInspectorPanel; accessibility={"focus":"Custom MenuItem focus behavior depends on its implementation","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Preset selection closes the menu; panel toggles leave it open; focus return is not managed."].
   - Outcome matrix: {"success":"toggle the Inspector panel: toggleInspectorPanel","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Not applicable — this control does not consume a collection, selection, or free-form payload that has an empty state.","disabled":"No explicit disabled prop on this candidate.","cancel":"Not applicable — this immediate handler has no cancellable operation or dismissible transient surface.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ViewMenu.interaction.test.tsx#control-d826a0ad433703cb open/close the View menu` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/shell/ViewMenu.interaction.test.tsx#control-a2d1b5cb37952878 select a layout preset` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -1342,7 +1386,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.interaction.test.tsx -t "control-d826a0ad433703cb open/close the View menu"`
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.interaction.test.tsx -t "control-a2d1b5cb37952878 select a layout preset"`
@@ -1352,11 +1396,11 @@
 
   Expected: FAIL because one or more of the 5 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/ViewMenu.tsx`, `web/src/components/shell/ViewMenu.tsx#ViewMenu` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.interaction.test.tsx -t "control-d826a0ad433703cb open/close the View menu"`
   - Run: `pnpm -C web test -- --run src/components/shell/ViewMenu.interaction.test.tsx -t "control-a2d1b5cb37952878 select a layout preset"`
@@ -1366,8 +1410,10 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
+
+  Result: PASS. The reviewed owning runner was the missing RED artifact; the existing `ViewMenu` implementation already satisfied all five contracts, so no production-code change was required. The true focused Vitest invocation passed 5/5, the complete web suite passed 726/726, and the production web build passed with only the pre-existing bundle warnings. The rebuilt macOS app then verified preset selection, checked states, three panel toggles, Escape dismissal, and outside-click dismissal. Runtime evidence: `runtime-artifacts/automated/view-menu-real-device-2026-07-30.md`.
diff --git a/docs/audit/2026-07-14/implementation-plans/inspector-text-keyframes-implementation.md b/docs/audit/2026-07-14/implementation-plans/inspector-text-keyframes-implementation.md
index 857cf24e..f23dbd96 100644
--- a/docs/audit/2026-07-14/implementation-plans/inspector-text-keyframes-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/inspector-text-keyframes-implementation.md
@@ -618,37 +618,41 @@
   - Visible/returned assertion: assert the exact success payload for the valid case and a stable typed error for the invalid case, including zero partial side effects and no leaked internal path or credential.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-render/tests/completion_457715e9d0e73d1b.rs#completion_457715e9d0e73d1b_captions_export_as_valid_srt_through_the_ui_comm.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/commands.rs#exports_non_empty_srt_with_cue_count` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/components/shell/TitleBar.visual.test.ts#subtitle export menu routes srt and vtt` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify the baseline**
 
   - Run: `cargo test -p opentake-tauri exports_non_empty_srt_with_cue_count`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "subtitle export menu routes srt and vtt"`
 
-  Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
+  Observed: the production UI/API/Tauri slice already existed, so the newly registered owning test passed immediately. No artificial production failure was introduced; the audit gap was missing evidence rather than missing runtime behavior.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/TitleBar.tsx#onExportSubtitles`, `web/src/lib/api.ts#exportSubtitles`, `src-tauri/src/commands.rs#export_subtitles`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+  Observed: production code required no change. The source-of-truth status documentation and focused UI/real-device evidence were corrected instead.
+
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri exports_non_empty_srt_with_cue_count`
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "subtitle export menu routes srt and vtt"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. See `docs/audit/2026-07-14/runtime-artifacts/automated/subtitle-export-real-device-2026-07-30.md` for focused, regression, native-UI, output-content, and hash evidence.
+
 ### Task 8: safe-preview-font-catalog (implementation-slice-bbb6af2d5d755acb)
 
 **Covered records:**
diff --git a/docs/audit/2026-07-14/implementation-plans/media-render-playback-export-implementation.md b/docs/audit/2026-07-14/implementation-plans/media-render-playback-export-implementation.md
index 58725b09..5bddd852 100644
--- a/docs/audit/2026-07-14/implementation-plans/media-render-playback-export-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/media-render-playback-export-implementation.md
@@ -31,34 +31,48 @@
   - Add deterministic media fixtures and golden frame, audio, timeline, or export assertions for every named capability and boundary; the affected render/media suites must pass.
   - Run the packaged preview/export path on representative media and retain exact output or runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/composite_acceptance.rs#capcut_children_close_one_composite_acceptance` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance capcut_children_close_one_composite_acceptance -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance capcut_children_close_one_composite_acceptance -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `node --test tools/completion-audit.test.mjs`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence (2026-07-31): the reviewed GPU test first failed on the
+polygon fixture (`pixel=(0,0) expected=0 actual=255`) while polygon masks were
+still encoded as a no-op, preserving the required RED receipt. The completed
+slice adds bounded polygon uniforms, CPU/GPU-matched transform geometry,
+Inspector creation/edit/delete controls, an on-canvas point editor, persistence,
+and command-routed undo/redo with explicit capacity validation. Both exact
+owning GPU tests pass; Web's 89 files / 805 tests, production build,
+`cargo fmt --check`, workspace Clippy with `-D warnings`, and
+`cargo test --workspace --no-fail-fast` pass. The ad-hoc-signed packaged macOS
+app also passes creation, point drag/add/delete, transform, feather, invert,
+undo/redo, save/reopen, preview capture, and 120-frame H.264 export. Preview and
+export frame 60 score SSIM 0.999753 and PSNR 62.854540 dB. Full receipt:
+`docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31.md`.
+
 ### Task 2: MR-nested-timeline (implementation-slice-b8f61feebde4e2ab)
 
 **Covered records:**
@@ -82,34 +96,40 @@
   - Add deterministic media fixtures and golden frame, audio, timeline, or export assertions for every named capability and boundary; the affected render/media suites must pass.
   - Run the packaged preview/export path on representative media and retain exact output or runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/nested_timeline.rs#nested_edits_preview_and_export_same_frames` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test nested_timeline nested_edits_preview_and_export_same_frames -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/clip.rs`, `crates/opentake-render/src/plan/build.rs#build_frame_plan`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test nested_timeline nested_edits_preview_and_export_same_frames -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence (2026-07-31):
+`runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md`.
+The historical parent failed because the owning targets were absent; the exact
+focused tests, full Rust/Web gates, strict local package verification, packaged
+create/edit/reopen/preview, and 231-frame H.264/AAC export now pass.
+
 ### Task 3: MR-optical-flow (implementation-slice-c85c1acc35668396)
 
 **Covered records:**
@@ -133,34 +153,41 @@
   - Convert a 24 fps motion fixture to 60 fps with exactly the expected output-frame count and unchanged first/last timestamps.
   - Add pixel/temporal regression tests plus a deterministic unsupported-device fallback; preview and export must select the same interpolation mode.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/optical_flow.rs#two_frame_fixture_is_deterministic_and_matches_preview_export` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test optical_flow two_frame_fixture_is_deterministic_and_matches_preview_export -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-render/src/gpu/compositor.rs#TextureResolver`, `crates/opentake-media/src/decode/frame.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test optical_flow two_frame_fixture_is_deterministic_and_matches_preview_export -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence (2026-07-31):
+`runtime-artifacts/automated/optical-flow-24-to-60-real-device-2026-07-31.md`.
+The historical owning target failed before the backend existed; the exact
+focused tests, opposing-local-motion regression, full Rust gates, strict local
+package verification, packaged 60 fps preview, and 120-frame H.264 export now
+pass with matching frame-1 motion bounds and SSIM 0.999515.
+
 ### Task 4: MR-mask-rendering (implementation-slice-dacb1d7732ff3450)
 
 **Covered records:**
@@ -187,32 +214,32 @@
   - Expose mask creation, point editing, delete, and undo/redo in Inspector/Preview without mutating source media.
   - Add GPU pixel fixtures for all three shapes at feather 0 and nonzero feather; preview and exported boundary frames must match within the project pixel-diff tolerance.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/gpu_effects.rs#circle_mask_clips_to_center` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-render/tests/gpu_effects.rs#linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test gpu_effects circle_mask_clips_to_center -- --exact`
   - Run: `cargo test -p opentake-render --test gpu_effects linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/grade.rs#Mask`, `crates/opentake-render/src/plan/build.rs`, `crates/opentake-render/src/gpu/compositor.rs#pack_masks`, `crates/opentake-render/src/gpu/shader.wgsl`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test gpu_effects circle_mask_clips_to_center -- --exact`
   - Run: `cargo test -p opentake-render --test gpu_effects linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -242,29 +269,29 @@
   - Expose analyze, strength/crop adjustment, cancellation, apply, reset, and undo without overwriting source media.
   - For a synthetic jitter fixture, demonstrate lower frame-to-frame tracked displacement, no uncovered pixels, and preview/export transform parity.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/stabilization.rs#synthetic_shake_produces_editable_undoable_preview_export_solution` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test stabilization synthetic_shake_produces_editable_undoable_preview_export_solution -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/analysis/stabilization.rs`, `crates/opentake-ops/src/command.rs`, `crates/opentake-render/src/plan/build.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test stabilization synthetic_shake_produces_editable_undoable_preview_export_solution -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
@@ -294,34 +321,36 @@
   - Expose add/reorder/parameter-change/remove operations through undoable Inspector commands.
   - Add one pixel fixture per advertised effect/filter and assert preview/export parity at default and non-default parameters.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/gpu_effects.rs#advertised_effect_registry_has_preview_export_golden_fixtures` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test gpu_effects advertised_effect_registry_has_preview_export_golden_fixtures -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/grade.rs#Effect`, `crates/opentake-render/src/plan/types.rs#LayerDraw`, `crates/opentake-render/src/gpu/compositor.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test gpu_effects advertised_effect_registry_has_preview_export_golden_fixtures -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime and packaged-app evidence: `docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-real-device-2026-07-31.md`.
+
 ### Task 7: MR-transitions (implementation-slice-36596c6aa0eb94d6)
 
 **Covered records:**
@@ -358,34 +387,36 @@
   - Enable the transitions media surface.
   - Add pixel/runtime tests for preview/export parity and undo.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/transitions.rs#adjacent_clip_transition_is_editable_undoable_and_matches_preview_export` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test transitions adjacent_clip_transition_is_editable_undoable_and_matches_preview_export -- --exact`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/transition.rs`, `crates/opentake-render/src/plan/build.rs`, `crates/opentake-render/src/gpu/compositor.rs`, `docs/architecture/CAPCUT-GAP.md`, `docs/architecture/HANDOFF-2026-07.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test transitions adjacent_clip_transition_is_editable_undoable_and_matches_preview_export -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime and packaged-app evidence: `docs/audit/2026-07-14/runtime-artifacts/automated/transition-real-device-2026-07-31.md`.
+
 ### Task 8: MR-lgg-proof (implementation-slice-4c614d7762698953)
 
 **Covered records:**
@@ -415,37 +446,39 @@
   - Visible/returned assertion: assert the exact success payload for the valid case and a stable typed error for the invalid case, including zero partial side effects and no leaked internal path or credential.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-render/tests/completion_2016fc49884f6dc7.rs#completion_2016fc49884f6dc7_lift_gamma_and_gain_controls_are_represented_and.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-domain/src/grade.rs#lift_gamma_gain_gain_scales` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-render/tests/gpu_effects.rs#lift_gamma_gain_matches_cpu_reference` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-domain lift_gamma_gain_gain_scales`
   - Run: `cargo test -p opentake-render --test gpu_effects lift_gamma_gain_matches_cpu_reference -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/grade.rs#ColorGrade`, `crates/opentake-render/src/gpu/compositor.rs#grade_blocks`, `crates/opentake-render/src/gpu/shader.wgsl`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-domain lift_gamma_gain_gain_scales`
   - Run: `cargo test -p opentake-render --test gpu_effects lift_gamma_gain_matches_cpu_reference -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime and packaged-app evidence: `docs/audit/2026-07-14/runtime-artifacts/automated/lgg-real-device-2026-07-31.md`.
+
 ### Task 9: MR-hsl-secondary (implementation-slice-0e1b61977fdbc412)
 
 **Covered records:**
@@ -463,40 +496,42 @@
 
 - Candidate/source: `doc-9edde6aa1ce22995` at `docs/architecture/CAPCUT-GAP.md:139` (requirement)
 - Expected behavior: HSL secondary controls are editable and rendered.
-- Resolution: `reviewed-mapping-report:MR-hsl-secondary` — No tracked HSL-secondary representation or render path was found.
+- Resolution: `implemented-and-verified:MR-hsl-secondary` — A bounded feathered HSL qualifier now persists through `ColorGrade`, renders through the shared CPU/WGSL chain, and is editable/resettable through the transactional Inspector path. Real GPU chart isolation and packaged preview/playback/export evidence are recorded below.
 - Exact acceptance contract:
   - Persist bounded hue-range, feather, hue, saturation, and lightness adjustments in the grade model.
   - Expose range selection and parameter edits with reset and undo/redo in Inspector.
   - Use a color-chart fixture to verify selected hues change while pixels outside the feathered range remain within the project pixel-diff tolerance in preview and export.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/gpu_effects.rs#hsl_secondary_hue_boundary_feather_and_isolation` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test gpu_effects hsl_secondary_hue_boundary_feather_and_isolation -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/grade.rs`, `crates/opentake-render/src/gpu/shader.wgsl`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test gpu_effects hsl_secondary_hue_boundary_feather_and_isolation -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime and packaged-app evidence: `docs/audit/2026-07-14/runtime-artifacts/automated/hsl-secondary-real-device-2026-07-31.md`.
+
 ### Task 10: MR-lut (implementation-slice-10ed256c8194fc18)
 
 **Covered records:**
@@ -514,40 +549,42 @@
 
 - Candidate/source: `doc-0b8b56b94a928929` at `docs/architecture/CAPCUT-GAP.md:145` (requirement)
 - Expected behavior: Validated 3D LUT files can be imported, previewed, and exported.
-- Resolution: `reviewed-mapping-report:MR-lut` — No validated LUT import, persisted reference, GPU 3D texture or preview/export path exists.
+- Resolution: `implemented-and-verified:MR-lut` — Validated 17/33-point `.cube` tables now publish into content-addressed project storage, persist as path-free clip references, and render through one shared 3D-texture path for preview, playback, inspection, and export. Transactional Inspector editing, real-GPU identity/known-transform parity, save/reopen, and complete packaged export evidence are recorded below.
 - Exact acceptance contract:
   - Parse and validate .cube LUT metadata, domain bounds, and 17- and 33-point tables; reject malformed or oversized input with typed errors.
   - Import, select, set intensity, remove, and undo LUT changes without copying arbitrary files outside project-managed storage.
   - Compare identity and known-transform LUT fixtures in GPU preview and export using the existing pixel-diff threshold, including save/reopen.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/lut.rs#malformed_and_oversized_luts_fail_closed_and_valid_lut_matches_preview_export` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test lut malformed_and_oversized_luts_fail_closed_and_valid_lut_matches_preview_export -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/lut.rs`, `crates/opentake-render/src/gpu/compositor.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test lut malformed_and_oversized_luts_fail_closed_and_valid_lut_matches_preview_export -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Runtime and packaged-app evidence: `docs/audit/2026-07-14/runtime-artifacts/automated/lut-real-device-2026-07-31.md`.
+
 ### Task 11: MR-loudness (implementation-slice-e668f03cd9c414d2)
 
 **Covered records:**
@@ -567,40 +604,42 @@
 
 - Candidate/source: `doc-30e9287b5c8858dd` at `docs/architecture/CAPCUT-GAP.md:161` (requirement)
 - Expected behavior: Audio loudness normalization targets and verifies a configured LUFS value.
-- Resolution: `reviewed-mapping-report:MR-loudness` — PCM, playback and export owners exist, but no loudness analysis or normalization target path exists.
+- Resolution: `implemented-and-verified:MR-loudness` — shared PCM analysis, undoable persistence, Inspector controls, native preview and export now form one verified vertical slice.
 - Exact acceptance contract:
   - Persist a target integrated loudness and true-peak ceiling as an undoable audio operation.
   - Expose analyze/apply/reset with progress and typed errors for silent or unreadable audio.
   - On speech and music fixtures, exported integrated loudness must be within ±1 LU of the configured target without exceeding the configured true-peak ceiling; preview gain must use the same computed adjustment.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/tests/loudness.rs#normalization_reaches_configured_lufs_within_tolerance` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media --test loudness normalization_reaches_configured_lufs_within_tolerance -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/decode/pcm.rs#extract_pcm`, `crates/opentake-media/src/analysis/loudness.rs`, `src-tauri/src/playback/audio.rs`, `src-tauri/src/export.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media --test loudness normalization_reaches_configured_lufs_within_tolerance -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The focused runner first failed to compile before the loudness owner existed, then passed with the known FFmpeg-cross-checked fixture and deterministic speech/music fixtures. The complete Rust workspace passed (environment-only integrations remain ignored), warnings-denied workspace Clippy, formatting and diff checks passed; the Web suite passed 90 files / 814 tests and the production build passed with only the pre-existing chunk/dynamic-import warnings. The rebuilt ad-hoc-signed macOS app verified analyze/apply/reanalyze/reset, undo/redo, native playback, writable save/reopen persistence and a typed silent-audio error. Independent FFmpeg measurements of the exported AAC deliverables were `-16.07 LUFS / -1.15 dBTP` for speech and `-16.02 LUFS / -1.74 dBTP` for music. Runtime evidence: [`loudness-real-device-2026-08-01.md`](../runtime-artifacts/automated/loudness-real-device-2026-08-01.md).
+
 ### Task 12: MR-denoise (implementation-slice-3d159672cfd1fc67)
 
 **Covered records:**
@@ -627,7 +666,7 @@
   - Expose preview toggle, apply/reset, cancellation, and undo/redo in the Audio Inspector.
   - On a speech-plus-noise fixture, assert at least 3 dB SNR improvement with no clipping, and verify preview/export use identical denoise parameters.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/tests/denoise.rs#deterministic_noise_fixture_and_bypass` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `src-tauri/src/playback/audio.rs#denoise_preview_uses_shared_processing_owner` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
@@ -635,7 +674,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media --test denoise deterministic_noise_fixture_and_bypass -- --exact`
   - Run: `cargo test -p opentake-tauri --no-default-features --features playback-engine denoise_preview_uses_shared_processing_owner`
@@ -643,11 +682,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/analysis/denoise.rs`, `src-tauri/src/playback/audio.rs`, `src-tauri/src/export.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media --test denoise deterministic_noise_fixture_and_bypass -- --exact`
   - Run: `cargo test -p opentake-tauri --no-default-features --features playback-engine denoise_preview_uses_shared_processing_owner`
@@ -655,12 +694,14 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The reviewed owning tests first failed because no shared denoise owner existed, then passed after the domain contract, pure-Rust spectral processor, playback/export integration, command/undo path, cancellable Tauri job and Inspector controls were connected. A second RED regression caught a rare STFT boundary peak (`input=0.388362`, `output=1.000000`); the edge crossfade and no-new-peak bound fixed it. The complete Rust workspace, warnings-denied Clippy, formatting and diff checks passed; the Web suite passed 91 files / 818 tests and the production build passed with only the pre-existing chunk/dynamic-import warnings. In the rebuilt ad-hoc-signed macOS app, adaptive and voice modes, strength, preview toggle, apply/reset, cancellation, undo/redo, native playback, save/reopen persistence, and export with preview disabled were exercised. The deterministic speech-plus-noise fixture improved from `10.414 dB` to `16.2872 dB` SDR (`+5.8732 dB`), while the exported AAC peak remained `-8.645 dB`. Runtime evidence: [`denoise-real-device-2026-08-01.md`](../runtime-artifacts/automated/denoise-real-device-2026-08-01.md).
+
 ### Task 13: MR-stems (implementation-slice-9139657f9c8c7ff5)
 
 **Covered records:**
@@ -679,40 +720,42 @@
 
 - Candidate/source: `doc-8a0fdfbeaab482c5` at `docs/architecture/CAPCUT-GAP.md:176` (requirement)
 - Expected behavior: Separate vocals/music/stems locally or through an explicitly configured generation provider.
-- Resolution: `reviewed-mapping-report:MR-stems` — No stem separation implementation was found; results must re-enter the shared media import and provenance path.
+- Resolution: `reviewed-mapping-report:MR-stems` — Completed for the explicitly scoped local centre/side extractor: both results re-enter the shared media import and provenance path; broader semantic separation remains tracked as a separate partial gap.
 - Exact acceptance contract:
   - Implementation: Implement an asynchronous stem-separation job with model installation/integrity checks, progress/cancel, derived-asset import, privacy/error UX, and audio-quality/integration fixtures; document local versus hosted execution.
   - Add deterministic media fixtures and golden frame, audio, timeline, or export assertions for every named capability and boundary; the affected render/media suites must pass.
   - Run the packaged preview/export path on representative media and retain exact output or runtime evidence before reclassification.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/tests/stems.rs#local_or_explicit_provider_selection_cancellation_provenance_and_cleanup` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media --test stems local_or_explicit_provider_selection_cancellation_provenance_and_cleanup -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/analysis/stems.rs`, `crates/opentake-gen/src/stems.rs`, `crates/opentake-core/src/session.rs`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media --test stems local_or_explicit_provider_selection_cancellation_provenance_and_cleanup -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. The reviewed owning test first failed because no stem owner existed, then passed after adding the bundled `opentake-center-v1` integrity-checked local profile, cancellable progress reporting, atomic two-output publication, explicit hosted-provider/privacy policy, atomic derived-asset import and source/model provenance. A packaged-runtime defect review then produced three additional RED regressions: selecting a generated source entered a Zustand selector update loop, project-relative derived media did not expose its resolved preview path, and the original side-channel accompaniment cancelled in the current mono export mixdown. Stable selectors, resolved DTO paths and dual-mono stem publication fixed those failures. The rebuilt ad-hoc-signed macOS app exercised local privacy copy, hosted consent/configuration fail-closed behavior, successful separation, save/reopen provenance, direct preview, timeline playback, independent vocals/accompaniment export, and cancellation of a 1,800-second job with no derived manifest entries or partial files. The local profile is deliberately a deterministic centre/side extractor for centred voice/dialogue, not semantic Demucs/MDX separation; hosted transport remains unavailable until an adapter is configured. Architecture and execution boundaries are documented in [`STEM-SEPARATION.md`](../../../architecture/STEM-SEPARATION.md). Runtime evidence: [`stems-real-device-2026-08-01.md`](../runtime-artifacts/automated/stems-real-device-2026-08-01.md).
+
 ### Task 14: MR-linked-audio-complete (implementation-slice-cbce9a4174a73347)
 
 **Covered records:**
@@ -741,37 +784,41 @@
   - Visible/returned assertion: assert the exact returned status plus deterministic frame/audio/container properties or typed unsupported/error output, and verify preview/export parity when both paths are named.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-render/tests/completion_1c3d81a8b3ab2d59.rs#completion_1c3d81a8b3ab2d59_do_not_create_a_linked_audio_track_when_probe_pr.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-agent/src/mcp/dispatch.rs#add_clips_does_not_link_audio_when_source_has_no_audio` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-agent/src/mcp/dispatch.rs#insert_clips_does_not_link_audio_when_source_has_no_audio` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and adjudicate the inherited baseline**
 
   - Run: `cargo test -p opentake-agent add_clips_does_not_link_audio_when_source_has_no_audio`
   - Run: `cargo test -p opentake-agent insert_clips_does_not_link_audio_when_source_has_no_audio`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Result: The current baseline was already GREEN, not RED. The two exact owning tests entered history in `a2f34cb` with the Agent linked-audio fix, while the zero-channel probe regression entered in `9920468`. No artificial failure was introduced merely to recreate historical RED; the current acceptance run executed both Agent tests and the probe regression directly.
+
+- [x] **Step 3: Verify the existing vertical slice and update its acceptance record**
 
   Modify only `crates/opentake-agent/src/mcp/dispatch.rs`, `crates/opentake-ops/src/ops/place.rs`, `docs/architecture/EDITING-ENGINE-PLAN.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-agent add_clips_does_not_link_audio_when_source_has_no_audio`
   - Run: `cargo test -p opentake-agent insert_clips_does_not_link_audio_when_source_has_no_audio`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Result: PASS. `cargo test -p opentake-agent does_not_link_audio_when_source_has_no_audio` executed both exact add/insert tests with 2/2 passing, and `cargo test -p opentake-media video_with_zero_channel_audio_has_no_audio` executed the probe test with 1/1 passing. The complete workspace gate had already passed on the same executable source immediately before this documentation-only reclassification. In the rebuilt release `.app`, an isolated project imported a five-second H.264 file with no audio stream, persisted `hasAudio:false`, created only a V1 clip with no `linkGroupId`, played normally, and exported 150 frames. Independent FFprobe inspection of the exported MP4 found one H.264 1280×720/30 fps stream and no audio stream. Runtime evidence: [`linked-audio-real-device-2026-08-01.md`](../runtime-artifacts/automated/linked-audio-real-device-2026-08-01.md).
+
 ### Task 15: MR-hdr-proxy-account-composite (implementation-slice-d2a7a5861f5ebc9b)
 
 **Covered records:**
@@ -793,23 +840,23 @@
   - Implement proxy creation, switching, relink, and persistence.
   - Finish account/provider session integration and cover offline/reopen behavior.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/composite_acceptance.rs#hdr_proxy_account_children_close_one_composite_acceptance` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance hdr_proxy_account_children_close_one_composite_acceptance -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `docs/architecture/HANDOFF-2026-07.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance hdr_proxy_account_children_close_one_composite_acceptance -- --exact`
 
@@ -821,6 +868,23 @@
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Current result (2026-08-01): product verification is GREEN (`cargo test
+  --workspace --no-fail-fast`, workspace Clippy with `-D warnings`, Rust fmt,
+  Web 93 files / 824 tests, and the production build). The exact completion
+  audit ran 206 tests with 205 passing; its only failure is the protected
+  `repository-files.json` inventory omitting previously tracked files. This
+  step remains unchecked until that user-owned inventory is reconciled rather
+  than overwritten by this slice.
+
+Functional completion evidence (2026-08-01): the owning composite test first
+failed because the target did not exist, then passed after separate HDR, proxy,
+and account children were implemented and verified. Packaged macOS testing
+found and fixed bundled-FFmpeg HDR black output, missing asset-protocol scope
+for proxies, and a final no-follow ancestor-directory boundary. The latest
+ad-hoc-signed app and its DMG copy pass strict deep verification; packaged GUI
+remove/recreate/persist/playback and original-only export pass. Full receipt:
+`../runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md`.
+
 ### Task 16: MR-bounded-audio-streaming (implementation-slice-d1864a5db0605004)
 
 **Covered records:**
@@ -846,37 +910,45 @@
   - Handle seek, pause, resume, underrun, and cancellation.
   - Add long-duration memory and A/V sync runtime tests.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/playback/audio.rs#large_mix_observes_cancellation_between_chunks` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `src-tauri/src/playback/audio.rs#long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri large_mix_observes_cancellation_between_chunks`
   - Run: `cargo test -p opentake-tauri long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/playback/audio.rs#mix_timeline_stereo`, `src-tauri/src/export.rs#mix_timeline_audio`, `crates/opentake-media/src/encode/mod.rs#VideoEncoder`, `docs/architecture/HANDOFF-2026-07.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri large_mix_observes_cancellation_between_chunks`
   - Run: `cargo test -p opentake-tauri long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completed 2026-08-01. The reviewed RED first failed because
+`mix_stereo_windows` did not exist. Playback now uses a bounded 2-second/4-slot
+generation queue; seek, pause/resume, underrun, cancellation, and teardown are
+covered. Export and save-as-WAV stream the same bounded windows to file-backed
+output. Both reviewed focused tests, the workspace gate, strict Clippy, Web
+tests/build, and packaged macOS playback/export/WAV probes pass. Full receipt:
+`../runtime-artifacts/automated/bounded-audio-streaming-real-device-2026-08-01.md`.
+
 ### Task 17: MR-renderer-debt-composite (implementation-slice-827681eebfb87194)
 
 **Covered records:**
@@ -1034,7 +1106,7 @@
   - Visible/returned assertion: assert the exact returned status plus deterministic frame/audio/container properties or typed unsupported/error output, and verify preview/export parity when both paths are named.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_428f02e756802f9f.rs#completion_428f02e756802f9f_the_playback_subsystem_implements_project_source.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/preview/playbackRoute.test.ts#routes plain forward video to WebKit` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `web/src/components/preview/nativePlaybackSession.test.ts#publishes only increasing matching frame sequences` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -1043,7 +1115,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/preview/playbackRoute.test.ts -t "routes plain forward video to WebKit"`
   - Run: `pnpm -C web test -- --run src/components/preview/nativePlaybackSession.test.ts -t "publishes only increasing matching frame sequences"`
@@ -1052,11 +1124,16 @@
 
   Expected: FAIL because one or more of the 6 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): this slice was implemented and reviewed in
+  the historical commits already named by `PLAYBACK-ENGINE.md` before this
+  generated checklist existed. The current baseline therefore produced GREEN;
+  no approved implementation was reverted merely to manufacture a new RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/preview/playbackRoute.ts#resolveTimelinePlaybackRoute`, `web/src/components/preview/nativePlaybackSession.ts`, `web/src/components/preview/rustFrameBuffer.ts`, `src-tauri/src/playback/engine.rs#PlaybackEngine`, `src-tauri/src/playback/resolver.rs#PlaybackResolverState`, `docs/architecture/PLAYBACK-ENGINE.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/preview/playbackRoute.test.ts -t "routes plain forward video to WebKit"`
   - Run: `pnpm -C web test -- --run src/components/preview/nativePlaybackSession.test.ts -t "publishes only increasing matching frame sequences"`
@@ -1065,12 +1142,20 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Verified 2026-08-01 as a reconciliation-only slice: all four exact owning tests
+pass on the current implementation; the complete Web suite is 93 files / 824
+tests, and the Task16 workspace gate already passed without an intervening code
+change. The final packaged application advanced and paused both WebKit and Rust
+routes, then reopened the WebKit project at its own zero playhead and 60-second
+duration after the Rust project boundary. Full receipt:
+`../runtime-artifacts/automated/playback-route-lifecycle-real-device-2026-08-01.md`.
+
 ### Task 19: MR-release-readiness-composite (implementation-slice-dd9855c810140649)
 
 **Covered records:**
@@ -1196,37 +1281,46 @@
   - Visible/returned assertion: assert the exact success payload for the valid case and a stable typed error for the invalid case, including zero partial side effects and no leaked internal path or credential.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_9900e773f8c063a8.rs#completion_9900e773f8c063a8_decode_both_proxy_id_and_upstream_id_job_shapes_.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-gen/src/job.rs#deserializes_proxy_shape_with_id` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-gen/src/job.rs#deserializes_upstream_shape_with_underscore_id` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-gen deserializes_proxy_shape_with_id`
   - Run: `cargo test -p opentake-gen deserializes_upstream_shape_with_underscore_id`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): the serde alias/default implementation and
+  both named tests predate this generated checklist, so the current baseline was
+  already GREEN. The proxy-shape owner was extended to assert all four absent
+  optional fields rather than reverting valid code to manufacture RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-gen/src/job.rs#GenerationJob`, `docs/modules/opentake-gen/client-transport.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-gen deserializes_proxy_shape_with_id`
   - Run: `cargo test -p opentake-gen deserializes_upstream_shape_with_underscore_id`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Verified 2026-08-01. Both exact job-shape tests and the complete
+`opentake-gen` package pass; formatting and diff checks pass. The immediately
+preceding unchanged-code workspace gate passed in Task16.
+
 ### Task 22: MR-cli-sidecar-boundary-complete (implementation-slice-bdb1294b5e15ccf0)
 
 **Covered records:**
@@ -1272,37 +1366,53 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_fd42ddbda4988918.rs#completion_fd42ddbda4988918_use_the_ffmpeg_ffprobe_sidecar_boundary_rather_t.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/src/ff.rs#env_override_is_respected_for_ffmpeg` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-media/src/ff.rs#default_ffprobe_is_ffprobe` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media env_override_is_respected_for_ffmpeg`
   - Run: `cargo test -p opentake-media default_ffprobe_is_ffprobe`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  RED recorded 2026-08-01: the corrected owning tests failed to compile because
+  the pure `resolve_cli_path` decision boundary did not exist.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/ff.rs#ffmpeg_path`, `crates/opentake-media/src/ff.rs#ffprobe_path`, `crates/opentake-media/Cargo.toml`, `docs/modules/opentake-media/OVERVIEW.md`, `docs/modules/opentake-media/probe-ff.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media env_override_is_respected_for_ffmpeg`
   - Run: `cargo test -p opentake-media default_ffprobe_is_ffprobe`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completed 2026-08-01. The resolver now has a deterministic tested priority of
+environment override, regular non-symlink packaged sidecar, then PATH. Exact
+owners and package regressions pass. The final macOS app contains runnable
+FFmpeg/ffprobe 6.0 and has no dynamic libav link; its current `--enable-nonfree`
+configuration remains a distribution-license blocker outside this boundary.
+Receipt: `../runtime-artifacts/automated/cli-sidecar-boundary-real-device-2026-08-01.md`.
+
+Superseded later on 2026-08-01: Apple Silicon now uses archive-and-binary
+checksum-pinned FFmpeg/ffprobe 7.0 GPL builds. The provisioner rejects
+`--enable-nonfree` and unredistributable license output before replacement, and
+the complete `opentake-media` suite passes against the replacement pair. See
+`../runtime-artifacts/automated/ffmpeg-license-replacement-2026-08-01.md`.
+
 ### Task 23: MR-motion-decoder-injection-complete (implementation-slice-ee5b0fb9f6f3c487)
 
 **Covered records:**
@@ -1346,37 +1456,46 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_c837d207c03a37cb.rs#completion_c837d207c03a37cb_inject_frame_decoding_into_motionclipsource_with.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/integration.rs#decoded_frame_returns_rgba_of_right_shape` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-motion/tests/pipeline.rs#full_pipeline_render_cache_and_ingest` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion decoded_frame_returns_rgba_of_right_shape`
   - Run: `cargo test -p opentake-motion --test pipeline full_pipeline_render_cache_and_ingest -- --exact`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): the closure-injection implementation and
+  both named owners predate this generated checklist, so the current baseline
+  is already GREEN; valid code was not reverted to manufacture RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-motion/src/integration.rs#MotionClipSource::new`, `docs/modules/opentake-motion/OVERVIEW.md`, `docs/modules/opentake-motion/integration.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion decoded_frame_returns_rgba_of_right_shape`
   - Run: `cargo test -p opentake-motion --test pipeline full_pipeline_render_cache_and_ingest -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Verified 2026-08-01. Both exact owners, all 58 motion tests, formatting, and
+warnings-denied motion Clippy pass. Production dependencies contain no image or
+ffmpeg decoder; `image` remains test-only. This closes decoder injection only,
+not the separately owned desktop motion/Lottie materialization.
+
 ### Task 24: MR-native-chromium (implementation-slice-1687c4455b65f8a6)
 
 **Covered records:**
@@ -1401,37 +1520,59 @@
   - Enforce request interception allowlists, CSP, document limits, cancellation, timeout, deterministic clock, and no ambient filesystem/network access.
   - Integration tests render a fixed animation twice byte-identically and cover blocked network, timeout, crash, malformed source, and cancellation.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/renderer.rs#chromium_skeleton_reports_unavailable_not_panic` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-motion/tests/chromium.rs#virtual_time_network_csp_timeout_cleanup_and_frame_identity` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion chromium_skeleton_reports_unavailable_not_panic`
   - Run: `cargo test -p opentake-motion --test chromium virtual_time_network_csp_timeout_cleanup_and_frame_identity -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  RED recorded 2026-08-01 with `--features chromium`: the planned test failed
+  to compile because cancellation, browser discovery/path injection, and the
+  live backend did not exist. The feature flag is required to exercise the live
+  owner; the unfeatured command intentionally verifies only fail-closed
+  `RendererUnavailable` behavior.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-motion/src/renderer.rs#HeadlessChromiumRenderer::render`, `crates/opentake-motion/src/integration.rs#MotionClipSource`, `docs/modules/opentake-motion/OVERVIEW.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion chromium_skeleton_reports_unavailable_not_panic`
   - Run: `cargo test -p opentake-motion --test chromium virtual_time_network_csp_timeout_cleanup_and_frame_identity -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  GREEN verified 2026-08-01 against Google Chrome 150.0.7871.187. The live
+  exact owner rendered a fixed animation twice byte-identically, advanced
+  visible virtual-time frames, decoded a real browser PNG through
+  `MotionClipSource`, allowed an exact loopback origin, blocked a disallowed
+  origin, fused a runaway script, handled process crash and malformed source,
+  cancelled an in-flight render, removed partial frames, and left no browser
+  profile. The existing owner passes both default and feature-enabled builds.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. Formatting, default and feature-enabled warnings-denied
+  Clippy, all 59 feature-enabled motion tests, and the full workspace Rust suite
+  pass. The first workspace attempt stopped only because generated debug
+  artifacts filled the disk; after deleting `target/debug/deps` and
+  `target/debug/incremental` (release bundle preserved), the identical command
+  passed. Runtime receipt:
+  `runtime-artifacts/automated/headless-chromium-real-device-2026-08-01.md`.
+
 ### Task 25: MR-motion-missing-frame-complete (implementation-slice-f16a70f238444e28)
 
 **Covered records:**
@@ -1458,34 +1599,49 @@
   - Visible/returned assertion: assert the exact success payload for the valid case and a stable typed error for the invalid case, including zero partial side effects and no leaked internal path or credential.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_379e138c3e674f1b.rs#completion_379e138c3e674f1b_treat_a_missing_corrupt_decoded_motion_frame_as_.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/integration.rs#missing_decoder_result_is_none` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion missing_decoder_result_is_none`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): `MotionClipSource::frame` already returned
+  the injected decoder's `None` unchanged, so the baseline owner was GREEN.
+  The owner was strengthened to use one valid PNG, one actually corrupted PNG,
+  and one actually deleted frame and still remained GREEN; valid code was not
+  reverted to manufacture RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-motion/src/integration.rs#MotionClipSource::frame`, `docs/modules/opentake-motion/integration.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion missing_decoder_result_is_none`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Verified 2026-08-01. The valid frame decodes at `6x4`; corrupt and missing
+  frames both return `None`; decoder calls do not recreate the missing file,
+  rewrite the corrupt bytes, or change the cache directory entry count.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. Focused owner, warnings-denied motion Clippy,
+  formatting, and the full workspace Rust suite pass. Evidence:
+  code:`crates/opentake-motion/src/integration.rs#MotionClipSource::frame` and
+  test:`crates/opentake-motion/src/integration.rs#missing_decoder_result_is_none`.
+
 ### Task 26: MR-motion-sandbox-complete (implementation-slice-70b5cbcce858ecde)
 
 **Covered records:**
@@ -1546,37 +1702,51 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_3a71829a7b489aae.rs#completion_3a71829a7b489aae_apply_sandbox_document_size_checks_before_both_s.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/sandbox.rs#document_size_ceiling_enforced` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-motion/src/renderer.rs#chromium_applies_sandbox_size_before_unavailable` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion document_size_ceiling_enforced`
   - Run: `cargo test -p opentake-motion chromium_applies_sandbox_size_before_unavailable`
 
   Expected: FAIL because one or more of the 3 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): both checks predated this generated plan,
+  so the baseline owners were already GREEN. Owners were extended with exact
+  byte/UTF-8 boundaries, both renderer paths, both Chromium feature modes, and
+  zero cache-directory side effects; valid code was not reverted to manufacture
+  RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-motion/src/renderer.rs#StubRenderer::render`, `crates/opentake-motion/src/renderer.rs#HeadlessChromiumRenderer::render`, `crates/opentake-motion/src/sandbox.rs#SandboxPolicy::check_document_size`, `docs/modules/opentake-motion/renderer.md`, `docs/modules/opentake-motion/sandbox.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion document_size_ceiling_enforced`
   - Run: `cargo test -p opentake-motion chromium_applies_sandbox_size_before_unavailable`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Verified 2026-08-01. Equality at the byte ceiling passes; one byte over and a
+  multi-byte UTF-8 overflow fail. Stub, unfeatured Chromium, and feature-enabled
+  Chromium all return `Sandbox` before creating a content-hash directory.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. Both focused owners in default mode, the Chromium owner
+  with the live feature, feature-enabled warnings-denied Clippy, formatting, and
+  the full workspace Rust suite pass.
+
 ### Task 27: MR-motion-png-complete (implementation-slice-329d3a7fb3b066f7)
 
 **Covered records:**
@@ -1604,37 +1774,52 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_2071153f8053805d.rs#completion_2071153f8053805d_emit_deterministic_rgba_png_frames_from_the_stub.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-motion/src/renderer.rs#stub_output_is_deterministic` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-motion/src/renderer.rs#stub_png_decodes_with_correct_dimensions_and_alpha` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-motion stub_output_is_deterministic`
   - Run: `cargo test -p opentake-motion stub_png_decodes_with_correct_dimensions_and_alpha`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+  Reconciliation note (2026-08-01): the dependency-free encoder and both
+  owners predated this generated plan, so baseline was already GREEN. Owners
+  were strengthened with PNG magic, exact RGBA, direct byte identity, and a
+  multi-block stored-deflate boundary; valid code was not reverted to
+  manufacture RED.
+
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-motion/src/renderer.rs#encode_solid_rgba_png`, `docs/modules/opentake-motion/renderer.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-motion stub_output_is_deterministic`
   - Run: `cargo test -p opentake-motion stub_png_decodes_with_correct_dimensions_and_alpha`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+  Verified 2026-08-01. Separate cache roots emit byte-identical PNGs; the real
+  decoder confirms dimensions/alpha and exact corner RGBA for a `200x100`
+  image whose scanlines cross the 65,535-byte deflate block boundary. `image`
+  remains dev-only in `opentake-motion/Cargo.toml`.
+
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. Both focused owners, warnings-denied motion Clippy,
+  formatting, and the full workspace Rust suite pass. `image` is listed only
+  under `opentake-motion` dev-dependencies.
+
 ### Task 28: MR-project-serde-complete (implementation-slice-9c460dd3f289f9bd)
 
 **Covered records:**
@@ -1663,37 +1848,46 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-agent/tests/completion_f2992815147bed14.rs#completion_f2992815147bed14_decode_persisted_project_domain_models_compatibl.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/upstream_compat.rs#applies_clip_defaults_for_omitted_fields` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-project/tests/upstream_compat.rs#migrates_generation_log_legacy_cost_and_version` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the baseline state**
 
   - Run: `cargo test -p opentake-project --test upstream_compat applies_clip_defaults_for_omitted_fields -- --exact`
   - Run: `cargo test -p opentake-project --test upstream_compat migrates_generation_log_legacy_cost_and_version -- --exact`
 
-  Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
+  Reconciled 2026-08-01: both strengthened owners remained GREEN before the
+  documentation-only implementation pass. The existing deserializers already
+  satisfied the candidate contract, so no artificial production regression
+  was introduced solely to manufacture RED.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-project/src/bundle.rs#Project::open_from_root`, `crates/opentake-domain/src/media.rs#MediaManifest::deserialize`, `docs/modules/opentake-project/OVERVIEW.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test upstream_compat applies_clip_defaults_for_omitted_fields -- --exact`
   - Run: `cargo test -p opentake-project --test upstream_compat migrates_generation_log_legacy_cost_and_version -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. Both focused owners pass with save/reopen equality,
+  explicit and absent manifest-version assertions, legacy generation-cost
+  migration, and stable synthesized IDs. Formatting, warnings-denied Clippy
+  for `opentake-project` and `opentake-domain`, and the full workspace Rust
+  suite pass.
+
 ### Task 29: MR-mask-effect-mixed-duplicate (implementation-slice-35e4fa716888cc28)
 
 **Covered records:**
@@ -1716,34 +1910,44 @@
   - Implement an explicit registry/pass pipeline for every shipped Effect name; reject unsupported names at the command boundary rather than silently passing metadata.
   - GPU/pixel-diff tests cover polygon inside/outside/edge/feather/invert, multiple masks, effect order, disabled effects, preview/export parity, and headless skip semantics.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/composite_acceptance.rs#mask_and_effect_records_have_separate_child_owners` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance mask_and_effect_records_have_separate_child_owners -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-render/src/gpu/compositor.rs`, `docs/modules/opentake-render/OVERVIEW.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance mask_and_effect_records_have_separate_child_owners -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The parent owner first failed on the stale module claim
+  that polygon masks and generic effects were no-op metadata, then passed after
+  the documentation and defensive compositor contract were corrected. Both
+  real-GPU child owners pass, including all three mask shapes, hard/feathered
+  and inverted coverage, multiple-mask intersection, every registered effect,
+  disabled effects, ordered chains, and byte-identical preview/export output.
+  The parent also proves mask/point overflow and unknown effects fail before
+  mutation. Formatting, warnings-denied render Clippy, and the full workspace
+  Rust suite pass.
+
 ### Task 30: MR-text-parity (implementation-slice-f92ff19f85ab4082)
 
 **Covered records:**
@@ -1768,7 +1972,7 @@
   - Add a pinned upstream comparison fixture for wrapping, fallback fonts, shadow padding, stroke width, size, and alignment across Chinese/Latin text.
   - Pass deterministic structural/pixel thresholds on macOS and the headless fallback while preserving non-crashing no-font behavior.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/gpu_text.rs#rasterize_is_deterministic_ssim_one` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-render/tests/gpu_text.rs#natural_size_shadow_padding_matches_upstream` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -1776,7 +1980,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test gpu_text rasterize_is_deterministic_ssim_one -- --exact`
   - Run: `cargo test -p opentake-render --test gpu_text natural_size_shadow_padding_matches_upstream -- --exact`
@@ -1784,11 +1988,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-render/src/gpu/text_engine.rs#CosmicTextRasterizer`, `crates/opentake-render/src/plan/types.rs#TextureSource::Text`, `docs/modules/opentake-render/text-rasterizer.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test gpu_text rasterize_is_deterministic_ssim_one -- --exact`
   - Run: `cargo test -p opentake-render --test gpu_text natural_size_shadow_padding_matches_upstream -- --exact`
@@ -1796,12 +2000,23 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The new owner first failed to compile because the
+  explicit no-font constructor did not exist; after adding it, the real empty
+  font database exposed cosmic-text's `no default font found` panic. The
+  production rasterizer now branches before shaping and returns the correctly
+  sized transparent premultiplied frame while preserving background/border
+  rendering. The pinned structural matrix passes for missing-family fallback,
+  Chinese/Latin text, wrapping, alignment, 12px-per-side shadow padding, and
+  1/2/4px border scaling at 540p/1080p/2160p. All eight text integration tests,
+  warnings-denied render Clippy, formatting, and the full workspace Rust suite
+  pass on macOS with real system fonts.
+
 ### Task 31: MR-media-principles-headings (implementation-slice-726e8186554da9b6)
 
 **Covered records:**
@@ -1843,34 +2058,48 @@
   - Visible/returned assertion: assert the exact returned status plus deterministic frame/audio/container properties or typed unsupported/error output, and verify preview/export parity when both paths are named.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-render/tests/completion_3336fb8bef6f3a49.rs#completion_3336fb8bef6f3a49_media_code_follows_cross_platform_frame_time_cac.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-render/tests/composite_acceptance.rs#media_principles_headings_reference_exact_child_capabilities` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance media_principles_headings_reference_exact_child_capabilities -- --exact`
 
   Expected: FAIL because one or more of the 2 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `docs/specs/media/0-principles.md`, `docs/specs/media/9-domain-contract.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-render --test composite_acceptance media_principles_headings_reference_exact_child_capabilities -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `node --test tools/completion-audit.test.mjs`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The aggregate owner first failed because neither
+  principle heading bound itself to executable children. Both documents now
+  reference the exact real-media probe, RGBA decode, 16 kHz PCM, waveform,
+  encode/reprobe, and export-pause owners; every child passes against local
+  generated fixtures. The compliance document now describes the actual FFmpeg
+  subprocess-sidecar architecture and explicitly retains the bundled
+  `--enable-nonfree` binary as a Beta release blocker. The focused aggregate,
+  formatting, and completion-audit Node gate pass.
+
+  Superseded later on 2026-08-01: the Apple Silicon pair is now a pinned GPL
+  7.0 build without `--enable-nonfree`, guarded by a fail-closed license check.
+  Native checks for other packaged targets and final package evidence remain
+  part of release readiness.
+
 ### Task 32: MR-bounded-index-runtime (implementation-slice-603290a188109040)
 
 **Covered records:**
@@ -1931,37 +2160,50 @@
   - Deduplicate duplicate requests, persist completed state atomically, invalidate changed media/model, and resume interrupted work after restart.
   - Test duplicate enqueue, source change, model upgrade, export pause/resume, cancellation, crash/restart, failure retry, and final index/transcript equality.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/src/index_coordinator.rs#export_pause_ref_counts` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `src-tauri/src/search.rs#bounded_single_worker_cancels_skips_stale_and_yields_to_playback_export` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media export_pause_ref_counts`
   - Run: `cargo test -p opentake-tauri bounded_single_worker_cancels_skips_stale_and_yields_to_playback_export`
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/search.rs#search_index_start`, `src-tauri/src/search.rs#index_assets`, `crates/opentake-media/src/index_coordinator.rs#ExportPause`, `crates/opentake-media/src/ort_worker/mod.rs#OrtModel`, `docs/specs/media/10-acceptance.md`, `docs/specs/media/7-ort-worker.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media export_pause_ref_counts`
   - Run: `cargo test -p opentake-tauri bounded_single_worker_cancels_skips_stale_and_yields_to_playback_export`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The owning tests first failed because the shared
+  pressure primitive had no balanced guard/wait protocol and no bounded worker
+  existed. Production `search_index_start` now submits one source/model-keyed
+  job to a process-wide capacity-8 `OrtWorker`; that job uses a lazy typed model
+  registry and serially performs missing visual and transcript work, checking
+  cancellation and playback/export pressure at every asset boundary. The
+  executor proves single-worker execution, live-key result dedupe, priority
+  FIFO, a four-interactive-job starvation bound, queue-full rejection,
+  queued/running cancellation, model-error and panic recovery, immediate failure
+  retry, balanced nested pressure wakeup, source/model invalidation, restart,
+  and clean shutdown with zero active jobs. Both focused owners, rustfmt,
+  all-feature clippy with `-D warnings`, and the full workspace suite pass.
+
 ### Task 33: MR-packaged-ffmpeg (implementation-slice-ddfcf34d5292a998)
 
 **Covered records:**
@@ -1986,34 +2228,55 @@
   - Resolve packaged sidecar paths without relying on developer PATH.
   - Run installed-app probe/decode/encode smoke tests on macOS and Windows.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `scripts/tests/packaged-sidecars-test.rb#packaged_macos_windows_sidecars_resolve_and_execute` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `ruby scripts/tests/packaged-sidecars-test.rb --name "packaged_macos_windows_sidecars_resolve_and_execute"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/ff.rs#ffmpeg_path`, `crates/opentake-media/src/ff.rs#ffprobe_path`, `src-tauri/tauri.conf.json`, `docs/specs/media/2-ffmpeg.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `ruby scripts/tests/packaged-sidecars-test.rb --name "packaged_macos_windows_sidecars_resolve_and_execute"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 from the tracked RED/GREEN receipt and reverified on
+  the current descendant. The original owner failed before the immutable
+  sidecar lock existed, then passed after checksum/version-pinned macOS arm64,
+  macOS x64, and Windows x64 supplies plus both platform `externalBin` configs
+  were added. Current macOS arm64 source binaries pass verify-only and the
+  empty-`PATH` probe/decode/encode smoke; the exact release `.app` sibling pair
+  passes the same installed-package owner and nested codesign verification.
+  GitHub Actions run `30614001607`, exact SHA
+  `9eeeb6ffe3088a16f19946ceb7db5e90090356ac`, remains a successful ancestor
+  receipt: its Windows full-product job built MSI/NSIS, silently installed NSIS,
+  and passed the installed-directory empty-`PATH` smoke. Current packaged-path
+  tests, Windows CI/config contracts, rustfmt, and the full workspace suite pass.
+  This closes sidecar resolution/execution only; the separately tracked
+  `--enable-nonfree` licensing replacement and Developer-ID/notarization gates
+  remain Beta-release blockers.
+
+  Superseded later on 2026-08-01 for Apple Silicon: the licensing replacement
+  is complete and the media suite passes against the new pair. Developer-ID/
+  notarization and native Windows/macOS Intel final-package evidence remain
+  separate release gates.
+
 ### Task 34: MR-ffmpeg-contract-complete (implementation-slice-2edbd096c204bad4)
 
 **Covered records:**
@@ -2091,7 +2354,7 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_376576e91988107c.rs#completion_376576e91988107c_the_named_ffmpeg_probe_decode_pcm_encode_contrac.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/tests/ffmpeg_integration.rs#probe_reports_dimensions_fps_and_audio` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-media/tests/ffmpeg_integration.rs#decode_frame_returns_rgba_of_expected_size` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -2100,7 +2363,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `cargo test -p opentake-media --test ffmpeg_integration probe_reports_dimensions_fps_and_audio -- --exact`
   - Run: `cargo test -p opentake-media --test ffmpeg_integration decode_frame_returns_rgba_of_expected_size -- --exact`
@@ -2109,11 +2372,11 @@
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/probe.rs#probe`, `crates/opentake-media/src/decode/frame.rs#decode_frame_at`, `crates/opentake-media/src/decode/pcm.rs#extract_pcm`, `crates/opentake-media/src/encode/mod.rs#VideoEncoder`, `docs/specs/media/2-ffmpeg.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media --test ffmpeg_integration probe_reports_dimensions_fps_and_audio -- --exact`
   - Run: `cargo test -p opentake-media --test ffmpeg_integration decode_frame_returns_rgba_of_expected_size -- --exact`
@@ -2122,12 +2385,23 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. Git history shows
+  all four named owning fixtures and their production paths landed together in
+  `d9b2812`; its parent does not contain the tests, so there is no honest
+  test-present/implementation-missing RED command to replay. On the current
+  descendant, each exact owner independently passes against generated local
+  media: probe returns dimensions/FPS/audio, frame decode returns the expected
+  RGBA shape, PCM extraction returns 16 kHz mono, and encoded output re-probes
+  as playable video. The checksum-pinned packaged sidecars also pass the
+  empty-`PATH` installed-app smoke, and rustfmt plus the full workspace suite
+  pass. No production change was required for this reconciliation.
+
 ### Task 35: MR-media-facade (implementation-slice-3adf63f547b1f57b)
 
 **Covered records:**
@@ -2205,37 +2479,48 @@
   - Visible/returned assertion: assert the returned project/error variant, exact post-operation files and decoded state, and save-then-reopen equality or the specified fail-closed no-write result.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_94ba8c5254bc852d.rs#completion_94ba8c5254bc852d_the_media_facade_exposes_probe_decode_encode_sea.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-media/src/lib.rs#crate_public_types_are_reachable` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-media/tests/facade_contract.rs#all_services_are_reachable_only_through_facade_and_dependencies_stay_acyclic` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-media crate_public_types_are_reachable`
   - Run: `cargo test -p opentake-media --test facade_contract all_services_are_reachable_only_through_facade_and_dependencies_stay_acyclic -- --exact`
 
   Expected: FAIL because one or more of the 4 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-media/src/lib.rs#MediaEngine`, `crates/opentake-media/src/probe.rs`, `crates/opentake-media/src/decode/mod.rs`, `crates/opentake-media/src/encode/mod.rs`, `crates/opentake-media/src/search/mod.rs`, `crates/opentake-media/src/transcribe/mod.rs`, `docs/specs/media/8-coordinator.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-media crate_public_types_are_reachable`
   - Run: `cargo test -p opentake-media --test facade_contract all_services_are_reachable_only_through_facade_and_dependencies_stay_acyclic -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The planned facade contract first failed to compile
+  because `MediaEngine` had no decode, PCM extraction, encoder-construction,
+  or visual-ranking methods. The minimal implementation now owns those four
+  boundaries while retaining the existing probe, transcript, and spoken-search
+  services. The owning integration test generates a deterministic 32x18 A/V
+  fixture and passes probe -> frame decode -> 16 kHz mono PCM -> fixture
+  transcriber -> H.264 encode -> re-probe through `MediaEngine`; it also ranks
+  a persisted visual index and asserts the workspace dependency DAG remains
+  acyclic. Both exact owning tests pass, strict all-feature Clippy is clean,
+  rustfmt is clean, and the full workspace suite passes.
+
 ### Task 36: MR-image-lottie-materialization (implementation-slice-a90703f04ca7e8c5)
 
 **Covered records:**
@@ -2260,34 +2545,46 @@
   - Define cache invalidation and device-loss behavior.
   - Add pixel, lifecycle, and export tests.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `src-tauri/src/playback/resolver.rs#lottie_cache_lifecycle_frame_modulo_and_preview_export_parity` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-tauri lottie_cache_lifecycle_frame_modulo_and_preview_export_parity`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `src-tauri/src/render.rs#MediaResolver::resolve`, `src-tauri/src/export.rs#MediaResolver::resolve`, `src-tauri/src/playback/resolver.rs#StreamingResolver::resolve`, `docs/specs/media/8-coordinator.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-tauri lottie_cache_lifecycle_frame_modulo_and_preview_export_parity`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+**Verified 2026-08-01:** RED was reproduced because the declared
+`LottieMaterializer` production boundary did not exist and all three product
+resolvers skipped Lottie. The shared Velato/Vello materializer now renders
+bounded, content-hashed textures on the existing wgpu device; preview,
+dedicated playback, and export own caches at their documented lifetimes and
+surface unsupported/invalid documents as explicit failures. The owning GPU
+pixel test passes and proves frame modulo, content invalidation, preview/export
+byte parity, and device-context rebuild behavior. `cargo fmt --all -- --check`,
+`cargo clippy -p opentake-tauri --all-targets --all-features -- -D warnings`,
+the focused owning test, and
+`CARGO_INCREMENTAL=0 cargo test --workspace --no-fail-fast --quiet` all pass.
+
 ### Task 37: MR-interchange-export-complete (implementation-slice-efcc28e98cc9b40e)
 
 **Covered records:**
@@ -2322,7 +2619,7 @@
   - Visible/returned assertion: assert the exact returned status plus deterministic frame/audio/container properties or typed unsupported/error output, and verify preview/export parity when both paths are named.
   - Evidence required: after the deterministic test passes, record code:<tracked-file>#<declared-symbol> and test:<tracked-test-file>#<exact-test-name>; proposed concrete evidence is test:crates/opentake-project/tests/completion_9ae7ed1acecc8998.rs#completion_9ae7ed1acecc8998_projects_export_interoperable_fcpxml_otio_and_ed.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/TitleBar.visual.test.ts#offers all four interchange formats with their extensions and commands` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
   - `crates/opentake-project/src/fcpxml_modern_tests.rs#document_has_fcpxml_header_and_version` (existing-owned) — Exact named test already exists in the reviewed owning runner and records current boundary behavior.
@@ -2331,7 +2628,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and reconcile the historical baseline**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "offers all four interchange formats with their extensions and commands"`
   - Run: `cargo test -p opentake-project document_has_fcpxml_header_and_version`
@@ -2340,11 +2637,11 @@
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-project/src/fcpxml.rs#export_xmeml`, `crates/opentake-project/src/fcpxml_modern.rs#export_fcpxml`, `crates/opentake-project/src/otio.rs#export_otio`, `crates/opentake-project/src/edl.rs#export_edl`, `src-tauri/src/commands.rs`, `web/src/components/shell/TitleBar.tsx#TitleBar`, `docs/需求与问题汇总.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/TitleBar.visual.test.ts -t "offers all four interchange formats with their extensions and commands"`
   - Run: `cargo test -p opentake-project document_has_fcpxml_header_and_version`
@@ -2353,12 +2650,26 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Reconciled 2026-08-01 as an already-integrated baseline. Git history shows
+  the EDL, OTIO and modern FCPXML writers and their format tests landed together
+  in `5713d22`, followed by the four-format title-bar route in `3d09eb6`; there
+  is therefore no honest test-present/implementation-missing RED command to
+  replay. The four declared owners pass on the current descendant, the exact
+  title-bar interaction suite covers success, failure, cancellation, extension
+  completion and all four Tauri routes, and the full workspace suite passes.
+  Existing packaged-app evidence additionally parsed both XML outputs with
+  `xmllint`, parsed OTIO with `jq`, verified the corrected three-event EDL, and
+  proved deterministic re-export. The historical requirement source now records
+  the shipped formats and their explicit degradation boundary; no production
+  code change was required for this reconciliation. Runtime evidence:
+  [`interchange-export-real-device-2026-07-30.md`](../runtime-artifacts/automated/interchange-export-real-device-2026-07-30.md).
+
 ### Task 38: control-acceptance (implementation-slice-5148c914ccdac250)
 
 **Covered records:**
@@ -2449,7 +2760,7 @@
   - Visible/accessibility/return path: success=choose export resolution: setQuality controls export preset; accessibility={"focus":"Custom Dropdown focus behavior depends on its implementation","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Success/cancel closes to the editor; failure keeps the dialog open. Trigger focus restoration is not implemented/tested."].
   - Outcome matrix: {"success":"choose export resolution: setQuality controls export preset","pending":"Not applicable — this activation only changes local/caller state and starts no Promise, API, Tauri command, or Rust work.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/ExportDialog.tsx:462; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in setQuality controls export preset; no broader cancellation behavior is assumed.","retry":"Not applicable as an error-recovery state — the synchronous local action can simply be activated again.","failure":"Not applicable — this immediate activation calls no API/Tauri/Rust boundary, so there is no backend rejection path."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ExportDialog.interaction.test.tsx#control-580ab884755388a9 dismiss Export by clicking the backdrop` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
   - `web/src/components/shell/ExportDialog.interaction.test.tsx#control-6064916ed05a1362 close Export from its header` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
@@ -2459,7 +2770,7 @@
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-580ab884755388a9 dismiss Export by clicking the backdrop"`
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-6064916ed05a1362 close Export from its header"`
@@ -2469,11 +2780,11 @@
 
   Expected: FAIL because one or more of the 5 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/ExportDialog.tsx`, `web/src/components/shell/ExportDialog.tsx#ExportDialog` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-580ab884755388a9 dismiss Export by clicking the backdrop"`
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-6064916ed05a1362 close Export from its header"`
@@ -2483,12 +2794,22 @@
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `pnpm -C web test -- --run && pnpm -C web build`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. RED was reproduced because the five declared DOM
+  owning tests did not exist. The new interaction runner exercises idle and
+  busy backdrop behavior, the header close guard, stale-error cleanup through
+  mode selection, codec-to-container routing, and resolution-to-request
+  routing against the real Zustand component state. All five focused tests
+  pass; the full Web suite passes 94 files / 829 tests, and the TypeScript plus
+  production Vite build passes with only the pre-existing chunk/dynamic-import
+  advisories. The production component already met the declared behavior, so
+  no component change was required.
+
 ### Task 39: control-acceptance (implementation-slice-c6fbd815566d6b64)
 
 **Covered records:**
@@ -2518,34 +2839,44 @@
   - Visible/accessibility/return path: success=cancel/close Export: idle closes; active video calls cancelExport(operationId); accessibility={"focus":"Native keyboard-focusable control","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Success/cancel closes to the editor; failure keeps the dialog open. Trigger focus restoration is not implemented/tested."].
   - Outcome matrix: {"success":"cancel/close Export: idle closes; active video calls cancelExport(operationId)","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/shell/ExportDialog.tsx:569; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/ExportDialog.tsx:569; the candidate-specific interaction test must assert that exact guard.","disabled":"No explicit disabled prop on this candidate.","cancel":"Cancellation/dismissal follows the exact guard in idle closes; active video calls cancelExport(operationId); no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in idle closes; active video calls cancelExport(operationId).","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/shell/ExportDialog.tsx:569; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ExportDialog.interaction.test.tsx#control-af586bdec82ebcc7 cancel/close Export` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-af586bdec82ebcc7 cancel/close Export"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/ExportDialog.tsx`, `web/src/components/shell/ExportDialog.tsx#onCancel`, `web/src/lib/api.ts#cancelExport`, `src-tauri/src/export.rs#cancel_export`, `web/src/components/shell/ExportDialog.tsx#ExportDialog` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-af586bdec82ebcc7 cancel/close Export"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The declared owner was absent, and its first execution
+  exposed an unhandled rejection when `cancel_export` failed: the dialog showed
+  neither the backend error nor failure feedback. `onCancel` now retains the
+  active dialog, renders the concrete rejection, and pushes the standard export
+  failure toast while preserving idle close and generation-safe cancellation
+  with the exact active operation id. The focused test passes, the full Web
+  suite passes 94 files / 830 tests, the production Web build passes with only
+  the pre-existing chunk/dynamic-import advisories, rustfmt is clean, and the
+  full Rust workspace suite passes.
+
 ### Task 40: control-acceptance (implementation-slice-73d069e581678e52)
 
 **Covered records:**
@@ -2577,34 +2908,45 @@
   - Visible/accessibility/return path: success=start video export: save dialog -> busy/progress -> success/cancel/failure -> cleanup; accessibility={"focus":"Native keyboard-focusable control","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["Success/cancel closes to the editor; failure keeps the dialog open. Trigger focus restoration is not implemented/tested."].
   - Outcome matrix: {"success":"start video export: save dialog -> busy/progress -> success/cancel/failure -> cleanup","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/shell/ExportDialog.tsx:587; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/ExportDialog.tsx:587; the candidate-specific interaction test must assert that exact guard.","disabled":"Disabled when {busy}.","cancel":"Cancellation/dismissal follows the exact guard in save dialog -> busy/progress -> success/cancel/failure -> cleanup; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in save dialog -> busy/progress -> success/cancel/failure -> cleanup.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/shell/ExportDialog.tsx:587; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/ExportDialog.interaction.test.tsx#control-543cacc54290eeba start video export` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-543cacc54290eeba start video export"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/ExportDialog.tsx`, `web/src/components/shell/ExportDialog.tsx#onExport`, `web/src/lib/api.ts#getDefaultProjectDir`, `src-tauri/src/commands.rs`, `web/src/lib/api.ts#exportVideo`, `src-tauri/src/export.rs#export_video`, `web/src/components/shell/ExportDialog.tsx#ExportDialog` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/ExportDialog.interaction.test.tsx -t "control-543cacc54290eeba start video export"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. The declared transaction owner was absent. The new DOM
+  test drives the real component through native-save cancellation, unsaved
+  project default-directory lookup, exact extension/request dispatch, scoped
+  progress delivery, success, backend cancellation, failure, retry readiness,
+  and listener cleanup. It passes together with all seven ExportDialog owners;
+  the full Web suite passes 94 files / 831 tests, the production Web build
+  passes with only the pre-existing chunk/dynamic-import advisories, and the
+  unchanged Rust boundary remains green under the full workspace gate run for
+  the immediately preceding cancellation slice. No production change was
+  required for this slice.
+
 ### Task 41: control-acceptance (implementation-slice-010eea5507e6b9ca)
 
 **Covered records:**
@@ -2634,34 +2976,44 @@
   - Visible/accessibility/return path: success=cancel Save Clip as Media: when current progress is cancellable and not cancelling, set cancelling=true and call cancelExport(current.operationId); rejection restores cancelling=false and pushes a failure toast; accessibility={"focus":"Native keyboard-focusable control","label":"Visible child text/title or caller-provided label; verify at runtime","shortcut":"None declared on this control"}; returnPath=["The non-modal status stays in the editor and disappears when store progress clears."].
   - Outcome matrix: {"success":"cancel Save Clip as Media: when current progress is cancellable and not cancelling, set cancelling=true and call cancelExport(current.operationId); rejection restores cancelling=false and pushes a failure toast","pending":"Pending behavior is the concrete busy/phase/disabled state in web/src/components/shell/SaveAsProgress.tsx:42; no additional state is inferred beyond the source.","empty":"Required empty/no-selection behavior is the render/handler guard in web/src/components/shell/SaveAsProgress.tsx:42; the candidate-specific interaction test must assert that exact guard.","disabled":"Disabled when {!progress.cancellable || progress.cancelling}.","cancel":"Cancellation/dismissal follows the exact guard in when current progress is cancellable and not cancelling, set cancelling=true and call cancelExport(current.operationId); rejection restores cancelling=false and pushes a failure toast; no broader cancellation behavior is assumed.","retry":"Retry is another activation after the source-defined pending guard clears; no separate retry command exists unless named in when current progress is cancellable and not cancelling, set cancelling=true and call cancelExport(current.operationId); rejection restores cancelling=false and pushes a failure toast.","failure":"Failure behavior is limited to the catch/void-call behavior visible in web/src/components/shell/SaveAsProgress.tsx:42; the missing DOM test must prove whether it is surfaced or silent."}.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `web/src/components/shell/SaveAsProgress.interaction.test.tsx#control-b0b920085e77d039 cancel Save Clip as Media` (reviewed-planned) — The control acceptance contract explicitly names this owning component test runner.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `pnpm -C web test -- --run src/components/shell/SaveAsProgress.interaction.test.tsx -t "control-b0b920085e77d039 cancel Save Clip as Media"`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `web/src/components/shell/SaveAsProgress.tsx`, `web/src/store/editActions.ts#cancelSaveAsMedia`, `web/src/lib/api.ts#cancelExport`, `src-tauri/src/export.rs#cancel_export`, `web/src/components/shell/SaveAsProgress.tsx#SaveAsProgress` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `pnpm -C web test -- --run src/components/shell/SaveAsProgress.interaction.test.tsx -t "control-b0b920085e77d039 cancel Save Clip as Media"`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+  Verified 2026-08-01. RED was reproduced because the declared DOM owner did
+  not exist. The new real-store interaction test proves visible progress,
+  disabled preparation state, exact operation-id cancellation, immediate
+  cancelling/duplicate-click protection, and rejection recovery with the
+  concrete failure toast. The focused owner passes; the full Web suite passes
+  95 files / 832 tests, and the production Web build passes with only the
+  pre-existing chunk/dynamic-import advisories. The Rust cancellation boundary
+  is unchanged and passed the full workspace gate in the immediately preceding
+  cancellation slice. No production change was required for this slice.
+
 ## Shared capability references
 
 - `event-forwarding` / `implementation-slice-c35c845cbc3492dd`: implemented once in `command-contracts`; this group contributes records `requirement-c3edeb41fee8e2a1`, `requirement-2c6c54de3cd8a488`, `requirement-30dda70b4f22a7d2` as acceptance references.
diff --git a/docs/audit/2026-07-14/implementation-plans/preview-timeline-implementation.md b/docs/audit/2026-07-14/implementation-plans/preview-timeline-implementation.md
index 3989e465..2dbc04ea 100644
--- a/docs/audit/2026-07-14/implementation-plans/preview-timeline-implementation.md
+++ b/docs/audit/2026-07-14/implementation-plans/preview-timeline-implementation.md
@@ -85,37 +85,44 @@
   - Create, open, trim, move, duplicate, and dissolve a two-level nested compound through undoable shared commands and the timeline UI.
   - Prove save/reopen equality plus preview/export frame parity at the compound in/out boundaries and fail clearly on recursive nesting cycles.
 
-- [ ] **Step 1: Write or extend every reviewed owning test**
+- [x] **Step 1: Write or extend every reviewed owning test**
 
   - `crates/opentake-project/tests/compound_roundtrip.rs#compound_clip_roundtrips_nested_timeline` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
   - `crates/opentake-render/tests/compound_render.rs#compound_clip_preview_export_frames_match` (reviewed-planned) — Reviewed planned test belongs in this tracked owning runner beside the mapped product boundary.
 
   Each assertion must exercise every covered candidate through the mapped product boundary; an existing-owned test may be extended, while a reviewed-planned test must be added at the declared runner path.
 
-- [ ] **Step 2: Run all focused tests and verify RED**
+- [x] **Step 2: Run all focused tests and verify RED**
 
   - Run: `cargo test -p opentake-project --test compound_roundtrip compound_clip_roundtrips_nested_timeline -- --exact`
   - Run: `cargo test -p opentake-render --test compound_render compound_clip_preview_export_frames_match -- --exact`
 
   Expected: FAIL because one or more of the 1 candidate-bound contracts are not yet satisfied.
 
-- [ ] **Step 3: Implement the minimal vertical slice**
+- [x] **Step 3: Implement the minimal vertical slice**
 
   Modify only `crates/opentake-domain/src/clip.rs#CompoundClip`, `crates/opentake-render/src/plan/types.rs#RenderClip::Compound`, `docs/architecture/CAPCUT-GAP.md` as required to satisfy every listed acceptance criterion, including visible success and explicit failure/recovery behavior.
 
-- [ ] **Step 4: Run all focused tests and verify GREEN**
+- [x] **Step 4: Run all focused tests and verify GREEN**
 
   - Run: `cargo test -p opentake-project --test compound_roundtrip compound_clip_roundtrips_nested_timeline -- --exact`
   - Run: `cargo test -p opentake-render --test compound_render compound_clip_preview_export_frames_match -- --exact`
 
   Expected: PASS with every candidate-bound assertion executed.
 
-- [ ] **Step 5: Run the subsystem regression gate**
+- [x] **Step 5: Run the subsystem regression gate**
 
   Run: `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast`
 
   Expected: PASS with no new warnings or unrelated changes.
 
+Completion evidence (2026-07-31):
+`runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md`.
+The exact owning tests, full Rust/Web gates, packaged create/open/trim/move/copy
+and paste flow, save/reopen persistence, paused/continuous preview, and retained
+export artifacts all pass; deterministic graph validation covers recursive
+cycle rejection.
+
 ### Task 3: multicam (implementation-slice-5902337034fd8e89)
 
 **Covered records:**
diff --git a/docs/audit/2026-07-14/repository-files.json b/docs/audit/2026-07-14/repository-files.json
index 5209f29e..77fad4f3 100644
--- a/docs/audit/2026-07-14/repository-files.json
+++ b/docs/audit/2026-07-14/repository-files.json
@@ -43,8 +43,8 @@
       "domain": "ci",
       "kind": "yml",
       "material": true,
-      "bytes": 5804,
-      "sha256": "3fc3f217490d1e7256537c0e543f7effad2f1067a0eca1763e979fe64086d7e1"
+      "bytes": 22326,
+      "sha256": "5c9003d210ff8321bba02312f560261b13310f37458f4ecd1513360caab48200"
     },
     {
       "id": "file-bc37d034bad56458",
@@ -55,6 +55,24 @@
       "bytes": 279,
       "sha256": "b93f80050368a0d8158210f81acfc92e892ad27de6d8e4361f6fc378f061bf86"
     },
+    {
+      "id": "file-794550be5bbee1a7",
+      "path": ".superpowers/sdd/task-11-red-replay.md",
+      "domain": "repository",
+      "kind": "markdown",
+      "material": true,
+      "bytes": 6328,
+      "sha256": "966a7fd7550b829bc081745922c0146e5cedf18d550535375a0af853b05e85f5"
+    },
+    {
+      "id": "file-4a547f596950c48e",
+      "path": ".superpowers/sdd/task-11-report.md",
+      "domain": "repository",
+      "kind": "markdown",
+      "material": true,
+      "bytes": 9631,
+      "sha256": "edada7a16aed1d29348ed666a0979cde89dd056a1729033715b6a88cffaccfa9"
+    },
     {
       "id": "file-a7634fad0877aa7d",
       "path": ".superpowers/sdd/task-5-agent-chat-report.md",
@@ -115,8 +133,8 @@
       "domain": "repository",
       "kind": "markdown",
       "material": true,
-      "bytes": 14438,
-      "sha256": "25bcc6200e6dcbea9a708eea66b36927a16a6805fb83b642ab0abf1c9c26d853"
+      "bytes": 14507,
+      "sha256": "30e765da63167c9f1c4130d2e017a2f2d47d36dd30f65ddcd4e7731de7c02629"
     },
     {
       "id": "file-eca12c0a30e25b4b",
@@ -133,8 +151,8 @@
       "domain": "repository",
       "kind": "lock",
       "material": true,
-      "bytes": 179112,
-      "sha256": "eb11d1de4293c81bf1b56326a04c65b651f97c88621bda0d4a74cfc1d5cd4166"
+      "bytes": 179474,
+      "sha256": "724fff40f782431628eec2370b3ad2fa6f3ee0e7b18cf1b00e364cd6aacad131"
     },
     {
       "id": "file-2e9d962a08321605",
@@ -142,8 +160,8 @@
       "domain": "repository",
       "kind": "toml",
       "material": true,
-      "bytes": 1037,
-      "sha256": "44ee820ebe8673c7652c56d1decab52902c63ea6697aa5c58226363e055110e4"
+      "bytes": 1081,
+      "sha256": "741bc589177a82c628f64bf6c1a12e45054764558d34f9802883b99a8255d077"
     },
     {
       "id": "file-be5c3eb56c8a1eeb",
@@ -214,8 +232,8 @@
       "domain": "opentake-agent",
       "kind": "toml",
       "material": true,
-      "bytes": 1431,
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       "material": true,
-      "bytes": 13247,
-      "sha256": "296eb08bd5e72d4b5435b1c44c7cd67b6d08b75711e72c156f3128c7ff9d5263"
+      "bytes": 20133,
+      "sha256": "223a28479ec731f5019e80a2f20120be4d3f20ceb1c736db43437c20701f46d8"
     },
     {
       "id": "file-ae123ba03cd6ac29",
@@ -7044,8 +7524,8 @@
       "domain": "web",
       "kind": "typescript-source",
       "material": true,
-      "bytes": 8004,
-      "sha256": "cad849b40ed4473a28df3bea683f357dae6b96e6e0930692bd1c29e8427fe320"
+      "bytes": 11950,
+      "sha256": "023ac8064222c8100dcd4ce4df50d21393eb40b51762d02d7816b3075881aaad"
     },
     {
       "id": "file-6c82a868b1fb4916",
@@ -7071,8 +7551,17 @@
       "domain": "web",
       "kind": "typescript-source",
       "material": true,
-      "bytes": 1744,
-      "sha256": "6a1e459c937279b7104b904ac289c07515c183456c709e71ba50549af2628974"
+      "bytes": 1756,
+      "sha256": "d5f0226a95d645c376e1b1e3e2f3e2c238abd26ce63e3f2f07089ee18e056760"
+    },
+    {
+      "id": "file-5c4516cda894cd83",
+      "path": "web/src/store/recentStore.test.ts",
+      "domain": "web",
+      "kind": "typescript-source",
+      "material": true,
+      "bytes": 2093,
+      "sha256": "2aaf44fef7957b25df854fc3ef61a23f6ea6b2a31ea1d19be32369198acd67af"
     },
     {
       "id": "file-5318270e4188d9b7",
@@ -7080,8 +7569,8 @@
       "domain": "web",
       "kind": "typescript-source",
       "material": true,
-      "bytes": 3165,
-      "sha256": "80a0d96b4b9c82668e77ef8c3f534249c1dbb5e0507fc1c1e0acdca6d0e940df"
+      "bytes": 5308,
+      "sha256": "4c5b0ed9f56531483267ac7a7fd7e703216a5d498d94d722f94bdd98ead31cb6"
     },
     {
       "id": "file-341f4d669a84a7d9",
@@ -7089,8 +7578,8 @@
       "domain": "web",
       "kind": "typescript-source",
       "material": true,
-      "bytes": 4381,
-      "sha256": "1419b2e0427ddef1d4cf750b8d82dc94b6d13325d8bcedf723f9735991e0bd20"
+      "bytes": 4514,
+      "sha256": "84e31e19636d1435d545d4aaafe89fbb884acfd2e3baf2d7e92ed211f1763c82"
     },
     {
       "id": "file-1cee16a36c760ade",
@@ -7110,6 +7599,15 @@
       "bytes": 3682,
       "sha256": "e2a15117b1c2aab824cd369e798a08395f2abf20a65de0c1690b5301aa542fec"
     },
+    {
+      "id": "file-df23b317193b321b",
+      "path": "web/src/store/uiStore.persistence.test.ts",
+      "domain": "web",
+      "kind": "typescript-source",
+      "material": true,
+      "bytes": 5151,
+      "sha256": "33b9660d6fb14d80d548365e7138718faca502a9d4702f213859b8d10c59c51d"
+    },
     {
       "id": "file-16b56f7f0491b365",
       "path": "web/src/store/uiStore.test.ts",
@@ -7125,8 +7623,8 @@
       "domain": "web",
       "kind": "typescript-source",
       "material": true,
-      "bytes": 18619,
-      "sha256": "c68e0d195829b7cf402930738600c6c0664d67a0ae801255be7983cf88c51aca"
+      "bytes": 23155,
+      "sha256": "99779767edc0d59c6636fd0973f2f86b7b94f424526150a1b35b46f2e8fdc0ac"
     },
     {
       "id": "file-962ac4047b1046f3",
@@ -7134,8 +7632,8 @@
       "domain": "web",
       "kind": "css",
       "material": true,
-      "bytes": 2705,
-      "sha256": "35105a71a4f9351dc28d2cb63b9308f5966b53a02609643b4cb5f20d35aeda3a"
+      "bytes": 3768,
+      "sha256": "9305547097c51b51a6678c614593983c5a1fd71444ceb44aba83ab9edafb5f25"
     },
     {
       "id": "file-5dea34a364b2d988",
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/agent-lottie-inspect-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/agent-lottie-inspect-real-device-2026-08-01.md
new file mode 100644
index 00000000..c0a109ea
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/agent-lottie-inspect-real-device-2026-08-01.md
@@ -0,0 +1,57 @@
+# Agent Lottie inspection real-device verification — 2026-08-01
+
+Scope: Agent Settings Generation Task 1 / advertised MCP tool reachability. This
+receipt covers the native Lottie source-inspection and composited-timeline
+materialization paths. Packaged desktop GUI verification remains part of the
+later plan-by-plan UI gate.
+
+## Runtime
+
+- Host: macOS, Apple Silicon, Asia/Shanghai
+- GPU: Apple M4, 8 cores, Metal 4
+- Display: built-in Liquid Retina, 2560×1664
+- Renderer: Velato/Vello on the shared `wgpu` device path
+- Test fixture: deterministic two-frame, 16×16, 2 fps Lottie document
+
+## RED
+
+The owning end-to-end test was added first and executed against the production
+`TauriMediaBridge`. It failed with the baseline typed result:
+
+```text
+inspect_media: Lottie rendering is not available in this build
+```
+
+No manifest or source bytes were mutated.
+
+## GREEN acceptance
+
+Command:
+
+```text
+CARGO_INCREMENTAL=0 cargo test -p opentake-tauri mcp::tests::inspect_media_renders_lottie_frames_over_gray_end_to_end -- --exact --nocapture
+```
+
+Result: PASS, one exact GPU-backed test executed. It verified:
+
+- the project-relative Lottie source is resolved through the live project
+  snapshot and rejected if it is not a retained regular file;
+- two evenly sampled source times (`0.25`, `0.75`) produce two different JPEG
+  frames through real Velato/Vello rasterization;
+- the first sample is red-dominant and the second green-dominant;
+- transparent pixels are composited over neutral gray;
+- returned width, height, frame rate, duration, MIME type, and source byte size
+  are authoritative;
+- no paid provider or network access is involved.
+
+The same `LottieMaterializer` is now used by `inspect_timeline`; Lottie layers
+are no longer silently omitted from Agent timeline inspection.
+
+## Gates
+
+- `cargo test -p opentake-agent hidden_tool_is_rejected_as_unadvertised`: PASS.
+- `cargo test -p opentake-agent --test advertised_tool_acceptance every_advertised_tool_is_live_or_absent -- --exact`: PASS.
+- `cargo clippy -p opentake-tauri -p opentake-agent --all-targets -- -D warnings`:
+  PASS.
+- `cargo fmt --all -- --check`: PASS.
+- `CARGO_INCREMENTAL=0 cargo test --workspace --no-fail-fast`: PASS.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/ai-matting-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/ai-matting-vertical-2026-08-01.md
new file mode 100644
index 00000000..b7ae0f5a
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/ai-matting-vertical-2026-08-01.md
@@ -0,0 +1,52 @@
+# AI Matting Vertical — 2026-08-01
+
+## Delivered surface
+
+- The capability-gated `ai_matte` Agent tool is advertised only after the
+  pinned RVM model passes regular-file, exact-byte-size, and SHA-256 checks.
+- The desktop host runs the official RVM MobileNetV3 FP32 ONNX graph through
+  the shared ORT worker with recurrent state preserved across frames.
+- Preview produces a content-addressed ProRes 4444 cache without modifying the
+  timeline or manifest. The Inspector shows that transparent result over a
+  checkerboard and reuses it for Apply.
+- Apply copies through a retained no-follow project-media capability, registers
+  generation provenance, replaces the selected clip in one durable undo entry,
+  and keeps the source media in the manifest.
+- Generated derivatives retain source audio, preserve their alpha plane, and
+  request straight-alpha premultiplication in still preview, continuous
+  playback, MCP timeline inspection, and export render plans.
+- The model installer is explicit, cancellable, reports byte progress, leaves
+  no partial model after cancellation/failure, and verifies the official
+  14,975,696-byte payload against
+  `88d4531297118f595bf2fd60f6f566aec2e559393802d1f436c380f0cbbd2828`.
+- `NOTICE` records the official Robust Video Matting project, authors,
+  ByteDance origin, and GPL-3.0 license. The model is downloaded on demand and
+  is not embedded in the application bundle.
+
+## Automated evidence
+
+- `OPENTAKE_TEST_RVM_MODEL=... CARGO_INCREMENTAL=0 cargo test -p opentake-tauri advanced::tests::official_matting_preview_apply_undo_and_reopen -- --nocapture`
+  - official ONNX inference on a real H.264/AAC fixture;
+  - preview leaves project state unchanged;
+  - apply preserves audio and provenance;
+  - undo/redo and save/reopen restore the correct media reference;
+  - a pre-cancelled cached request still returns the typed cancellation result.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-media --test ffmpeg_integration prores_4444_roundtrip_preserves_alpha_plane -- --exact`
+  - alpha samples survive the real FFmpeg encode/decode round trip.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-media --features ort-backend,model-download analysis::matting::tests::pre_cancelled_download_never_creates_a_partial_model -- --exact`
+  - cancellation completes before network access and publishes no partial file.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-media --features ort-backend,model-download --all-targets -- -D warnings`
+  - passed.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-tauri --all-targets -- -D warnings`
+  - passed.
+- `pnpm test -- MattingSection.test.tsx`
+  - the repository runner executed all 112 test files: 863 tests passed.
+- `pnpm build`
+  - TypeScript build and production Vite bundle passed; existing chunk-size and
+    ineffective-dynamic-import warnings remain non-fatal.
+
+## Remaining acceptance evidence
+
+Packaged macOS GUI verification and final delivery export inspection are still
+required before the planning checkbox is closed. Those steps intentionally run
+after the complete code gate so the evidence represents the Beta candidate.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/avatar-voice-clone-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/avatar-voice-clone-vertical-2026-08-01.md
new file mode 100644
index 00000000..a5168c19
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/avatar-voice-clone-vertical-2026-08-01.md
@@ -0,0 +1,43 @@
+# Avatar and voice-clone vertical evidence — 2026-08-01
+
+Scope: advanced AIGC identity workflows for digital avatar and custom voice. This artifact records the production contracts, deterministic provider fixtures, persistence/export checks, and UI component tests. It does not claim that a paid provider request was consumed.
+
+## Production contracts
+
+- Avatar generation uses the fixed fal `fal-ai/sync-lipsync/v3/image-to-video` endpoint with one project image and one project audio asset. Consent and paid-cost confirmation are mandatory. The fal request id, canonical request SHA-256, provider/model, source asset ids and source digests persist in generation provenance.
+- fal queue polling is bounded to 30 minutes. User cancellation requests the official remote queue cancellation endpoint and prevents local import. Result URLs use the existing redirect-disabled, public-HTTPS-only, bounded generation downloader.
+- Avatar output must probe as video with audio and match the narration duration within one project frame before a single durable Register + Place transaction. Failure/cancellation removes staging output.
+- Voice enrollment uses ElevenLabs Instant Voice Cloning multipart upload; cloned speech uses the fixed `eleven_multilingual_v2` model. Provider resource ids are restricted to safe path-segment characters before they enter an authenticated endpoint.
+- Voice reference digest, consent id, provider voice id and request hash persist without credentials. Enrollment and permanent revocation are external-identity audit mutations outside ordinary document undo/redo. Duplicate enrollment is rejected before paid submission; cancellation or local persistence failure deletes the newly created remote voice.
+- Remote voice deletion is idempotent (`404` means already absent). A deleted voice cannot be revived by undo and is rejected before any later provider generation call.
+
+Official provider references:
+
+- <https://fal.ai/models/fal-ai/sync-lipsync/v3/image-to-video/api>
+- <https://fal.ai/docs/documentation/model-apis/inference/queue>
+- <https://elevenlabs.io/docs/api-reference/voices/ivc/create>
+
+## Automated evidence
+
+The avatar fixture generates a real H.264/AAC result and covers consent/cost failure, pre-cancellation, atomic import/placement, provenance, save/reopen, one-step generated-media undo, and six-frame export with audio.
+
+The voice fixture covers invalid consent, enrollment, cancellation before provider use, provider failure with zero import, generated-audio provenance and audition path, generated-media undo, permanent provider/local revocation, undo resistance, save/reopen, and rejection after revocation without calling the provider.
+
+Passing gates:
+
+```text
+CARGO_INCREMENTAL=0 cargo test -p opentake-domain -p opentake-ops -p opentake-core -p opentake-tauri
+CARGO_INCREMENTAL=0 cargo clippy -p opentake-domain -p opentake-ops -p opentake-core -p opentake-tauri --all-targets -- -D warnings
+CARGO_INCREMENTAL=0 cargo clippy -p opentake-tauri --all-targets --no-default-features -- -D warnings
+cargo fmt --all -- --check
+npm test                         # 117 files, 876 tests
+npm run build
+```
+
+Rust results include 64 core unit tests, 234 domain unit tests, 202 ops unit tests, 416 Tauri unit tests, all selected integration tests, and their doc tests. Real-device-only playback/export probes remain explicitly ignored by their existing test annotations.
+
+## Remaining Beta gate
+
+- Enter user-owned fal and ElevenLabs keys in the packaged application and run one explicitly authorized paid request per provider.
+- Verify the packaged Smart Pack tabs, consent/cost controls, cancel/retry, avatar preview, voice audition, undo and permanent revoke interactions visually.
+- Retain the resulting packaged-app screenshots, media probes and project reopen evidence in the sequential Beta validation report.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/beta-1-sequential-validation-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/beta-1-sequential-validation-2026-08-01.md
new file mode 100644
index 00000000..ad6d4829
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/beta-1-sequential-validation-2026-08-01.md
@@ -0,0 +1,101 @@
+# OpenTake 1.0.0-beta.1 顺序验收记录
+
+- 验收时间：2026-08-01 22:48 CST（Asia/Shanghai）
+- 平台：Apple Silicon macOS
+- 候选版本：`1.0.0-beta.1`
+- 候选应用：`target/release/bundle/macos/OpenTake.app`
+- 候选 DMG：`target/release/bundle/dmg/OpenTake_1.0.0-beta.1_aarch64.dmg`
+- 验证工程：`~/Documents/OpenTake/未命名.opentake/OpenTake-Beta1-Sequential-QA.opentake`
+
+## 结论
+
+候选包按照发布清单 1 → 11 顺序完成了代码门禁、真实桌面 GUI 操作、项目保存重开、
+本地 Motion 渲染、官方 Codex Agent 编辑和最终媒体导出。验收中发现并修复了一个真实
+阻断问题：旧工程缺少可选 `voiceModels` 字段时，声音克隆页的 Zustand selector 每次
+返回新的空数组，导致 React 无限重渲染和 WebView 空白。新增回归测试先复现失败，改为
+稳定空集合后通过；重建候选包后在原旧工程上重新打开声音克隆页成功。
+
+## 代码门禁
+
+- `cargo fmt --all -- --check`：通过。
+- `git diff --check`：通过。
+- `CARGO_INCREMENTAL=0 cargo clippy --workspace --all-targets -- -D warnings`：通过。
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-tauri --no-default-features --all-targets -- -D warnings`：通过。
+- `CARGO_INCREMENTAL=0 cargo test --workspace`：通过；所有执行测试无失败，真实设备专用 probe
+  按测试声明保持 ignored。
+- `npm test`：119 个测试文件、882 项测试通过。
+- `npm run build`：通过。
+- `web/node_modules/.bin/tauri build --bundles app,dmg`：通过。
+
+已知非阻断警告：`block v0.1.6` 的 Rust future-incompatibility 提示，以及 Vite 的大 chunk /
+动态导入提示；两者均未造成编译、测试或运行失败。
+
+## 候选包哈希与签名边界
+
+- DMG SHA-256：`394ae88d0d47ffe1f1286b34903fceb79cb38acf0b73b70fe0c3ec86a1e1b1cf`
+- 应用主程序 SHA-256：`c015e1af2a9369e6e5fb030818e8c1e32648dca400d578faddd3cfda3105721e`
+- 应用架构：Mach-O arm64。
+- 当前签名：ad-hoc / linker-signed，`TeamIdentifier` 为空；没有 Developer ID Application
+  身份和 Apple 公证凭据，因此本 Beta 不宣称已 Developer ID 签名或公证。
+
+## 1 → 11 顺序桌面验收
+
+1. **Home / 工程生命周期**：保存、返回主页、完全退出应用、重新启动、从最近工程选择并
+   按 Return 打开均成功；聊天、时间线、媒体、文本和历史状态恢复正确，撤销/重做栈按重开
+   规则清空。
+2. **素材库**：视频缩略图、音频波形素材、收藏开关、“我的”全局库、音频声部分离素材、
+   文件/文件夹导入原生选择器均可见并可操作；720p 代理实际生成并持久化，重开后代理文件
+   存在；离线重链接由条件 UI 与 Rust 回归测试覆盖。
+3. **时间线**：链接选择同时选中视频/音频；播放头移动至 138 帧后对链接组实际分割为两组，
+   撤销、重做、再次撤销恢复原状；复制/粘贴和出点裁剪实际执行后全部撤销。吸附、拖放与嵌套
+   序列由相同候选包的时间线控件观察及 workspace 集成测试覆盖。
+4. **预览与画布**：真实播放/暂停从 0 推进到 138 帧（00:04:18），逐帧/seek 控件可用；
+   Transform、Crop、Mask、运动追踪和关键帧控件可见。保存工程中的 X/Y 位置关键帧重开后仍
+   标记为“已在关键帧面板动画化”；A/V 同步由实际导出媒体 probe 共同验证。
+5. **文本与字幕**：文本片段内容 `OpenTake Beta 1`、字体、字号、颜色和样式重开后正确；
+   字幕转写在无语音测试素材上明确返回“未检测到语音”，翻译保持 Provider 同意/费用门禁；
+   SRT / VTT 导出入口和原生保存流程实际执行。
+6. **特效与调色**：视频检查器实际观察并可进入曝光、色温、Lift/Gamma/Gain、对比、饱和、
+   3D LUT、HSL 二级调色、参考画面色彩匹配、绿幕、蒙版、智能擦除、效果/滤镜、防抖和运动
+   追踪；相邻片段转场面板正确识别切点并显示 15 帧交叉溶解。对应 GPU / LUT / HSL / 蒙版 /
+   防抖 / 补帧 / 擦除测试全部通过。
+7. **音频**：声部分离已实际产出 `Vocals` 与 `Accompaniment` 两个独立 WAV 素材并落入独立
+   轨道；响度目标 `-16 LUFS`、降噪预览/重置、分离控件可见；最终 H.264/H.265/ProRes 导出
+   均含 48 kHz 单声道音频。
+8. **Agent / MCP / Codex**：官方 `codex-cli 0.144.1` 显示“已通过官方 Codex 登录：
+   ChatGPT”。真实 Agent 指令仅把唯一文本改为 `OpenTake Codex Beta Verified`，Codex 通过
+   `get_timeline` 和 `set_clip_properties` 完成 MCP 编辑；撤销/重做验证后最终恢复原文并保存。
+   Anthropic 未配置时明确引导设置，不伪装成功。图文成片计划 UI、同意/费用边界和对应原子性
+   测试通过。
+9. **Motion Canvas**：实际用本地浏览器渲染 3 秒标题卡，生成 `Motion Graphic` MP4 并在
+   138 帧加入新视频轨；保存、重开后媒体和片段仍存在。再次运行 1 秒渲染正常留在编辑器并
+   显示“动效已添加到时间线”，随后撤销测试用第二片段。
+10. **数字人 / 声音克隆**：数字人页面必须同时选择素材并勾选本人/声音授权和付费授权；
+    实际触发后因无 fal key 明确拒绝。声音克隆空白页缺陷修复后，参考音频、名称、同意、费用、
+    注册、生成试听、永久撤销控件均正常显示；实际注册因无 ElevenLabs key 明确拒绝并显示重试，
+    未发起付费请求。取消、试听、撤销和撤销不可逆边界由组件及 Rust workflow 测试覆盖。
+11. **交付导出与最终重开**：实际导出 H.264、H.265/HEVC、ProRes 422、SRT、VTT、XMEML、
+    FCPXML、OTIO 和 CMX3600 EDL；随后保存、完全退出、重启并重开工程，最终文本、Motion、
+    代理、图片、媒体和时间线均恢复。
+
+## 导出媒体 probe
+
+| 输出 | 视频 | 音频 | 尺寸 / 帧率 | 时长 | SHA-256 |
+| --- | --- | --- | --- | --- | --- |
+| H.264 MP4 | `h264` | AAC, 48 kHz, mono | 1280×720 / 30 fps | 12.5 s | `e6c21d87a2de852a0cd1f73288db39defafc17edccd9e79dd428ea8f1ce282d4` |
+| H.265 MP4 | `hevc` | AAC, 48 kHz, mono | 1280×720 / 30 fps | 12.5 s | `4bf347462eef62160260c6bc4173eee4078870d0161e5c813af9ac799f064156` |
+| ProRes MOV | `prores` | PCM s16le, 48 kHz, mono | 1280×720 / 30 fps | 12.5 s | `57fba9c267f89cd097be8497f2f6cc6f438ca012fcc0e641d9422ef479d7cb80` |
+
+- `xmllint --noout` 验证 XMEML 与 FCPXML：通过。
+- `jq -e` 验证 OTIO JSON：通过。
+- EDL 含三个视频事件和 12 帧交叉溶解记录。
+- 当前时间线没有字幕 cue，因此 SRT 为 0 字节，VTT 为合法的 8 字节 `WEBVTT` 头；这是后端
+  空字幕导出的既定契约，不是静默失败。
+
+## 外部发布门槛
+
+- 最终 Git 标签必须指向包含本记录和声音克隆回归修复的精确提交。
+- GitHub Actions 必须针对该精确提交 SHA 成功完成 Windows / Web / Rust 构建测试后才可
+  创建 `v1.0.0-beta.1` prerelease。
+- macOS 资产可用于本地 Beta 测试，但因缺少 Developer ID 与公证，不适合向不愿绕过
+  Gatekeeper 的普通终端用户宣称为正式安装包。
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/bounded-audio-streaming-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/bounded-audio-streaming-real-device-2026-08-01.md
new file mode 100644
index 00000000..cf90d061
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/bounded-audio-streaming-real-device-2026-08-01.md
@@ -0,0 +1,114 @@
+# Bounded audio streaming packaged real-device evidence — 2026-08-01
+
+Parent: `MR-bounded-audio-streaming`
+
+Environment: macOS arm64, packaged release application, bundled FFmpeg 6.0,
+Chinese UI. Desktop actions were performed through the packaged GUI. Shell
+probes only generated fixtures, inspected processes, signatures, and completed
+media artifacts.
+
+## Packaged artifact and process identity
+
+- Application executable SHA-256:
+  `a92c3e31d503300b87806ecd36aec48ba3128c49f202c9c78167e301b6f75711`.
+- DMG SHA-256:
+  `040d44146f224c0aedc45cafe0cf333bae5fa10eaad3ae8c820e1f2b0fc99e57`.
+- The whole `.app`, signed DMG, and the `.app` mounted from that DMG pass
+  strict/deep code-signature verification. The mounted executable has the same
+  SHA-256 as the source bundle.
+- The signature is ad hoc (`Signature=adhoc`, `TeamIdentifier=not set`), so this
+  is local package-integrity evidence, not Developer ID/notarization evidence.
+- An already-running pre-build process was detected and explicitly quit. The
+  final probes below ran only after PID `10645` was launched from the rebuilt
+  executable above.
+
+## Fixture
+
+- Source:
+  `/private/tmp/opentake-task16-bounded-audio-60s-20260801.mp4`.
+- SHA-256:
+  `98c2f4eb83acf1a18628b008434bf129f961bef090b6ba711aaacdc23c827daa`.
+- H.264 640×360 at 30 fps plus AAC 48 kHz mono, exactly 60.000 seconds.
+- Project:
+  `/private/tmp/opentake-task16-bounded-audio-real-device-20260801.opentake`.
+
+## Packaged playback
+
+The rebuilt application opened the 60-second project at `00:00:00 / 01:00:00`.
+
+- Playback advanced across the two-second scheduling boundary to
+  `00:03:28 / 01:00:00`, then settled at `00:04:06` after pause. A second
+  observation 2.2 seconds later still reported `00:04:06`.
+- Jump-to-end reported `01:00:00`; jump-to-start reported `00:00:00`.
+- Resume after that seek advanced to `00:03:17`, proving the new generation was
+  decoded and consumed after the stale queue was discarded.
+- The preview continued rendering changing test-pattern frames while its audio
+  device clock advanced; no frozen playhead or visible black fallback occurred.
+
+## Packaged full export
+
+The final rebuilt process exported the entire 60-second timeline through the
+GUI at the 720p preset:
+
+- Output:
+  `/private/tmp/opentake-task16-final-binary-export-20260801.mp4`.
+- SHA-256:
+  `13fc06a151f07b85cdfe30ad2d497d4893a1afe94e247a70d73e90fe8bb5d381`.
+- Size: 12,670,639 bytes; duration: exactly 60.000 seconds.
+- Video: H.264, 1280×720.
+- Audio: AAC, 48 kHz, mono.
+
+During export, the encoder owned a private `audio.pcm` spool and received only
+bounded mix windows. Final AAC mux succeeded after all 1,800 video frames were
+rendered; the public output remained zero bytes until atomic completion.
+
+## Packaged WAV save-as-media
+
+An 8-second audio clip backed by the same source was selected in the final
+packaged timeline and `另存为媒体` was invoked from its context menu. The media
+panel changed from two to three entries. After normal project save,
+`media.json` persisted the new result as a project-relative audio source.
+
+- Output:
+  `/private/tmp/opentake-task16-audio-save-real-device-20260801.opentake/media/clip_22d2704d-929f-41b4-a46e-2cc1ef9f7ec2_18c780113066a660_0.wav`.
+- SHA-256:
+  `4444ced67f9b66ac37e1e4e7d537e75f12ac4b38f40322c2ed3d1e190e8378ee`.
+- PCM s16le, 48 kHz, mono, exactly 8.000 seconds and 768,044 bytes including
+  the WAV header.
+
+This path writes each bounded window directly after a pre-sized WAV header; it
+does not collect the full mix in a production `Vec`.
+
+## Automated ownership and regression gates
+
+- RED was recorded when
+  `long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference`
+  could not compile because `mix_stereo_windows` did not exist.
+- Reviewed focused tests:
+  `large_mix_observes_cancellation_between_chunks` and
+  `long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference`
+  both pass.
+- Added ownership covers stale seek generations, underrun-as-silence, pause
+  retaining the next valid chunk, decode cancellation, and encoder PCM spool
+  growth without a retained timeline mix.
+- Export integration `export_with_audio_clip_mux_aac_stream` passes with a real
+  AAC output. The real save-as-media Rust test also writes and imports WAV.
+- `cargo fmt --all -- --check` passes.
+- `cargo test --workspace --no-fail-fast` passes. Environment-dependent tests
+  remain explicitly ignored; no executed test failed.
+- `cargo clippy --workspace --all-targets -- -D warnings` passes.
+- Web: 93 files / 824 tests pass; TypeScript and production Vite build pass.
+
+Cancellation was verified at the owned decode/mix/encoder boundaries by the
+focused and workspace tests. A separate attempt to drive the packaged cancel
+button during the saturated full-resolution GPU export could not obtain a
+responsive accessibility window before that export completed, so it is not
+claimed as packaged-GUI cancellation evidence.
+
+## Result
+
+`MR-bounded-audio-streaming` is **PASS** for its declared implementation slice:
+long playback, full video export, and WAV save-as-media no longer retain the
+whole timeline PCM mix; seek, pause/resume, underrun, cancellation, and teardown
+have explicit owned tests, and the successful package probes cover the actual
+release application.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/caption-translation-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/caption-translation-vertical-2026-08-01.md
new file mode 100644
index 00000000..9c0f7680
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/caption-translation-vertical-2026-08-01.md
@@ -0,0 +1,17 @@
+# Caption translation vertical — 2026-08-01
+
+`requirement-dbe026f6228381a6` is implemented as a production desktop and Agent vertical.
+
+- Captions are addressed by persisted clip ID. Provider output is rejected on unknown or duplicate IDs, and omitted/empty items become per-caption failures.
+- The production bridge uses the existing Settings → AI BYOK keychain boundary for OpenAI or Anthropic, requires explicit cost authorization, redacts provider bodies from errors, and supports cancellation before and after the network request.
+- Preview returns the exact source/translated diff with the project epoch/version. Captions lets the user accept or reject each change, retry the provider, apply the accepted subset, cancel, and undo.
+- `ApplyCaptionTranslations` validates the complete batch before mutation, keeps clip ID, caption group, track, start frame, and duration unchanged, and stores source text, source/target locale, provider, and model. Manual text editing clears that provenance.
+- Provider-wide failure leaves the timeline unchanged. Partial success changes only successful captions; failed caption text remains original.
+
+Focused verification:
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-ops caption_translation -- --nocapture` — 2 passed.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri caption_translation -- --nocapture` — 2 passed, including success/save-reopen/undo and partial/failure atomicity.
+- `npm test -- CaptionsTab.test.tsx` — 1 passed, exercising review, individual rejection, apply, and undo.
+- `npm test` — 115 files / 872 tests passed.
+- `npm run build` — TypeScript and production Vite build passed (existing chunk-size/dynamic-import warnings only).
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/cli-sidecar-boundary-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/cli-sidecar-boundary-real-device-2026-08-01.md
new file mode 100644
index 00000000..b94e5261
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/cli-sidecar-boundary-real-device-2026-08-01.md
@@ -0,0 +1,42 @@
+# CLI sidecar boundary packaged evidence — 2026-08-01
+
+Parent: `MR-cli-sidecar-boundary-complete`
+
+## Code boundary
+
+- RED: corrected owners first failed because `resolve_cli_path` was absent.
+- GREEN: environment override, PATH fallback, regular packaged-sidecar
+  selection, and Unix symlink rejection pass without mutating process-wide
+  environment variables.
+- `ffmpeg-sidecar` is built with default features disabled, so OpenTake does not
+  use its download stack and does not link a libav ABI binding.
+
+## Final packaged macOS application
+
+- App executable SHA-256:
+  `a92c3e31d503300b87806ecd36aec48ba3128c49f202c9c78167e301b6f75711`.
+- Bundled `ffmpeg` SHA-256:
+  `68249fcf774472381c5ee0fd7bb91065ab8a8cd8ed3ab6d0672ebc2f33974190`.
+- Bundled `ffprobe` SHA-256:
+  `acf7b76a64dddcc099f272d2dfee4ae9b185244bd532ca54dc7d4d2379765940`.
+- Both sidecars report version 6.0 and execute from
+  `OpenTake.app/Contents/MacOS` beside `opentake`.
+- `otool -L` on `opentake` reports no `libavcodec`, `libavformat`, `libavutil`,
+  `libswscale`, or `libswresample` dynamic dependency.
+- `codesign --verify --deep --strict` passes for the whole app. The signature is
+  ad hoc; this is not Developer ID/notarization evidence.
+- Packaged GUI probe/decode/playback/export paths used these sidecars in the
+  immediately preceding Task15/16 real-device receipts.
+
+## Distribution limitation
+
+The current FFmpeg 6.0 binary reports a configuration containing both GPL
+components and `--enable-nonfree`. This proves the technical CLI boundary, but
+it is not a public-distribution license clearance. Replace it with a pinned,
+license-compatible build and publish the matching notices before a public Beta.
+
+## Result
+
+`MR-cli-sidecar-boundary-complete` is **PASS** for the declared implementation
+slice. Public release packaging remains blocked on the separately owned
+sidecar-license/signing acceptance.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/color-match-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/color-match-vertical-2026-08-01.md
new file mode 100644
index 00000000..0502b8e1
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/color-match-vertical-2026-08-01.md
@@ -0,0 +1,54 @@
+# Reference Color Match Vertical — 2026-08-01
+
+## Delivered surface
+
+- The capability-gated `match_color` Agent tool is backed by the desktop host
+  and accepts an ordinary forward 1x image/video target, target timeline frame,
+  reference image/video asset, and reference source frame.
+- Both frames are decoded at bounded resolution and sampled in linear BT.709.
+  The `opentake-luma-preserving-mean-match` v1 algorithm normalizes reference
+  chromaticity to the target luma, then emits an ordinary editable per-channel
+  gain grade.
+- Preview performs no project mutation and reports target/reference/matched
+  linear means, CIE Delta E 1976 before/after, target luma before/after, the
+  exact generated grade, and algorithm version.
+- The Inspector lists visual media references, exposes reference/target frame
+  inputs, preview, cancellation, retry, color swatches, measured Delta E/luma,
+  Apply, and Undo. The ordinary Color Grade controls remain the editor for the
+  applied result.
+- Apply commits the grade and persisted `ColorMatchInput` together in one
+  optimistic-revision edit. Provenance includes reference asset/frame, target
+  frame, algorithm/version, sampled means, Delta E, and luma. Any later manual
+  grade edit clears that provenance so the project cannot mislabel an altered
+  grade as the original sampled match.
+- The existing shared render plan carries the same `Clip.color_grade` into
+  interactive preview and export; there is no separate export approximation.
+
+## Automated evidence
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri color_match_improves_delta_e_preserves_luma_and_persists_editable_grade --lib -- --nocapture`
+  - passed with fixed PNG target/reference/black fixtures;
+  - preview reduced CIE Delta E to below 0.01 and below its input value while
+    keeping absolute target-luma drift below 0.01;
+  - black low-confidence analysis failed without changing timeline/version;
+  - Apply persisted an editable grade and complete provenance;
+  - Undo/redo and save/reopen restored the exact grade and provenance;
+  - pre-cancelled analysis returned typed cancellation.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-ops color_match_command_tests --lib`
+  - the grade/provenance pair forms one undo entry, and a later manual grade
+    edit clears sampled-match provenance.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-domain -p opentake-ops -p opentake-tauri --all-targets -- -D warnings`
+  - passed.
+- `npm test -- --run`
+  - all 114 web test files passed: 870 tests;
+  - preview/measurement, Apply/Undo, cancellation with stale-result rejection,
+    missing-reference refusal, and reversed-clip refusal passed.
+- `npm run build`
+  - TypeScript and the production Vite bundle passed; existing chunk-size and
+    ineffective-dynamic-import warnings remain non-fatal.
+
+## Remaining acceptance evidence
+
+Packaged macOS GUI verification and a final preview/export inspection remain
+required before `requirement-7d79665fbcb91584` is closed. These run against the
+assembled Beta candidate after the complete code gate.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cache-identity-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cache-identity-real-device-2026-07-31.md
new file mode 100644
index 00000000..4685eeb4
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cache-identity-real-device-2026-07-31.md
@@ -0,0 +1,40 @@
+# Data safety cache identity real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 6 `DS-cache-identity-complete`.
+- Requirement: `requirement-52da354b46176a99`.
+- Boundary: stable lowercase 32-hex file identity from path, Foundation/Swift modification time, and size, with no identity for missing metadata.
+
+## Exact code evidence
+
+- `identity_hex_is_stable_and_lowercase`: PASS, 1/1.
+- `identity_hex_matches_swift_for_whole_second_mtime`: PASS, 1/1.
+- `file_identity_key_missing_file_is_none`: PASS, 1/1.
+
+The full cache-key module additionally covers every identity component, Foundation subsecond rounding, pre-epoch times, Swift closest-shortest and exponential formatting, independent SHA-256 prefixes, visual versus transcript/embedding seed order, real file metadata, and missing files.
+
+These owning tests already passed at the initial baseline, so Task 6 required runtime evidence closure rather than a production patch; no artificial RED failure was introduced.
+
+## Packaged application result
+
+During Task 3, the packaged application imported `/private/tmp/opentake-task8-music.wav` and visibly rendered its waveform in the media panel. The production `MediaVisualCache` wrote:
+
+`~/Library/Caches/com.opentake.desktop/media-cache/MediaVisualCache/67f1356ac2a7dc98b08d839f7cbb38a5.waveform`
+
+The source file had:
+
+- byte size: `88278`;
+- Foundation modification time: `1785475345.638414`;
+- absolute path: `/private/tmp/opentake-task8-music.wav`.
+
+An independent Swift process used `Foundation.FileManager` for the same size/date values and `CryptoKit.SHA256`, retaining the first 32 lowercase hex characters. It produced:
+
+- transcript/embedding order `path|mtime|size`: `246a0ff48bba2d5609aff5bd6fa3e7f6`;
+- visual order `path|size|mtime`: `67f1356ac2a7dc98b08d839f7cbb38a5`.
+
+The independently calculated visual identity exactly matched the packaged application's real cache filename. The filename is 32 lowercase hex characters, representing the first 16 SHA-256 bytes as required.
+
+## Outcome
+
+Task 6 is complete: focused Rust vectors, missing-file behavior, and an actual packaged waveform cache agree with the independent Swift/Foundation implementation. This closes one data-safety record only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cross-cutting-security-partial-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cross-cutting-security-partial-2026-07-31.md
new file mode 100644
index 00000000..6d20efd4
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-cross-cutting-security-partial-2026-07-31.md
@@ -0,0 +1,72 @@
+# Data safety cross-cutting security partial evidence — 2026-07-31
+
+## Status
+
+Task 10 `DS-cross-cutting-security-headings` remains **open**. This checkpoint closes the concrete CSP, asset-scope, packaged-sidecar supply, Windows installed-package, and offline WebView2 configuration defects discovered during audit, but does not claim the task's release-signing criteria or a native Windows WebView UI smoke.
+
+## Defect found and corrected
+
+The audited `src-tauri/tauri.conf.json` had `csp: null` and asset scope `['**']`. That allowed the WebView asset protocol to request arbitrary readable paths and left production content loading without an explicit CSP.
+
+The corrected packaged boundary now has:
+
+- production CSP with `default-src 'self'`, `object-src 'none'`, `frame-ancestors 'none'`, no remote HTTPS source, and only loopback HTTP for the native preview transport;
+- separate development CSP for local Vite WebSocket traffic, so production does not retain a WebSocket allowance;
+- asset protocol static scope limited to app cache, app-owned global-library data, and packaged resources;
+- explicit deny precedence for `.ssh`, `.gnupg`, and `.aws` home trees;
+- native dialog runtime grants persisted across restart via `tauri-plugin-persisted-scope` with its `protocol-asset` feature;
+- no shell, filesystem, HTTP, or process plugin command permission exposed to the main WebView.
+- the Windows NSIS/MSI bundle embeds the silent WebView2 offline installer, so a fresh installation does not depend on network access;
+- each Windows CI job that compiles the Tauri crate provisions the checksum- and version-pinned FFmpeg/FFprobe sidecars before compilation.
+
+## Automated evidence
+
+`src-tauri/tests/security_config.rs` proves:
+
+- packaged CSP is enabled, local-only, and carries the required deny directives;
+- asset scope contains exactly the three application-owned allow patterns and no global/home wildcard;
+- the main capability contains no shell/fs/http/process command permission;
+- persisted-scope is enabled for the asset protocol and initializes after the required fs plugin.
+- the Windows platform bundle selects `offlineInstaller` with silent installation;
+- all three Windows Tauri CI jobs provision the pinned sidecars before their first Tauri compile/build step.
+
+Result: PASS, 6/6. The four existing cross-cutting owning tests also pass 1/1 each, the Web suite passes 82 files / 774 tests, and the complete Rust workspace regression passed after the hardening patch.
+
+The exact-source Windows product run also passed:
+
+- source SHA: `9eeeb6ffe3088a16f19946ceb7db5e90090356ac`;
+- workflow: [run 30614001607](https://github.com/appergb/OpenTake/actions/runs/30614001607), success;
+- product job: [job 91102897263](https://github.com/appergb/OpenTake/actions/runs/30614001607/job/91102897263), success;
+- installed-package owning test: `PASS: packaged_macos_windows_sidecars_resolve_and_execute`;
+- artifact: ID `8787369512`, server digest `sha256:f287f5a9309245b9e415b55d52b72c75ddaaae1651fccfe03bfc8c15514b3a63`;
+- MSI SHA-256: `2dfe332521214fab8892be21bd5800e2708cf38161fa0c401c3602be507c6dd7`;
+- NSIS SHA-256: `d85002098bdf6883811251261947d399800140fa3cc2c2850bc7e3fbceedb95c`.
+
+That job bundled the offline WebView2 installer, built both native installers,
+silently installed NSIS, ran the media owning test from the installed directory
+with an empty `PATH`, and bound the uploaded installer receipt to the exact
+source SHA.
+
+## Packaged application evidence
+
+The exact hardened tree built successfully with:
+
+`./web/node_modules/.bin/tauri build --debug --bundles app`
+
+The rebuilt `/target/debug/bundle/macos/OpenTake.app`:
+
+1. launched to Home under the production CSP;
+2. opened the legacy project through the native directory picker;
+3. visibly rendered the persisted text, four media entries, a waveform cache, and the project-relative HTTPS-imported image;
+4. exited and relaunched;
+5. reopened the same project from Recents without another picker;
+6. again rendered the same timeline and local-resource surfaces.
+
+The persisted runtime files `.persisted-scope` and `.persisted-scope-asset` exist under the application's support directory after the picker/restart cycle.
+
+## Remaining Task 10 blockers
+
+- Native Windows packaged-WebView launch and interactive UI smoke evidence is not yet attached. The installer itself and its installed sidecars are covered by the exact-SHA native CI receipt above.
+- macOS distribution identity signing and Apple notarization evidence is not yet available; the current debug `.app` is only a local QA artifact.
+
+Accordingly, no Task 10 plan checkbox is marked complete and this checkpoint does not authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-generation-seed-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-generation-seed-real-device-2026-07-31.md
new file mode 100644
index 00000000..329ae301
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-generation-seed-real-device-2026-07-31.md
@@ -0,0 +1,51 @@
+# Data safety generation-log seed real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 5 `DS-generation-seed`.
+- Requirements: `requirement-b9010e6717b5d5ea`, `requirement-1f35cc4131f8f0b7`.
+- Boundary: missing or malformed optional generation log, deterministic manifest-provenance seed, save, reopen, and idempotence.
+
+## Exact code evidence
+
+- `malformed_generation_log_is_ignored`: PASS, 1/1.
+- `missing_generation_log_seeds_manifest_provenance_once`: PASS, 1/1.
+
+The core owning test covers empty and mixed manifests, imported versus generated assets, duplicate provenance, manifest reorder, duplicate asset identities, signed zero timestamps, edit/save/reopen, existing-log precedence, malformed optional logs, compatibility read-only protection, and byte-stable repeated saves.
+
+Both exact tests already passed at the initial baseline, so this task required packaged-app evidence closure rather than a new production patch; no artificial RED failure was introduced.
+
+## Packaged application fixture
+
+`/private/tmp/opentake-ds-generation-seed-real-device.opentake` started with:
+
+- no `generation-log.json`;
+- one imported media entry without generation provenance;
+- two video entries carrying identical legacy provenance;
+- one audio entry carrying different legacy provenance;
+- an empty timeline.
+
+The packaged application opened the bundle and visibly rendered all four offline media entries with relink recovery controls. Before editing, a filesystem check confirmed `generation-log.json` was absent.
+
+## Edit, save, and reopen
+
+Using the packaged UI, the run added a text clip with `Generation seed verified` and returned Home to save. The new `generation-log.json` contained exactly two entries:
+
+- one deterministic `legacy-generation:{sha256}` id for `legacy-video-model` at `700000000.0`;
+- one different deterministic id for `legacy-audio-model` at `700000010.0`.
+
+The imported asset was excluded and the duplicate video provenance collapsed to one event. The application then reopened the project from Recents: the text rendered in the preview, all four media entries remained, and the timeline contained the saved clip. Returning Home again produced no duplicate event and no byte changes.
+
+Stable SHA-256 values after both the first and second save:
+
+| File | SHA-256 |
+|---|---|
+| `generation-log.json` | `9aaecae32ecef935036afc9dc918617cc80451912092623384897834ee593702` |
+| `project.json` | `ebf598a4150763d70a473cfd47ba5250952f3f1be5ac0a54af5587dbe4cccd8b` |
+| `media.json` | `ea8a7397f7f247a3bf6f71c03ff881e102b8adec9ca02c1ed0af7259eb46ddb8` |
+
+The persisted log count remained two and all ids remained unique after the second process-level open/save cycle.
+
+## Outcome
+
+Task 5 is complete: exact tests and a packaged legacy-project round trip agree on deterministic one-time seeding, deduplication, safe persistence, and idempotence. This closes two data-safety records only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-legacy-default-matrix-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-legacy-default-matrix-real-device-2026-07-31.md
new file mode 100644
index 00000000..36296df5
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-legacy-default-matrix-real-device-2026-07-31.md
@@ -0,0 +1,55 @@
+# Data safety legacy/default matrix real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 1 `DS-legacy-default-matrix`.
+- Requirement: `requirement-365ac4943b157d3e`.
+- Boundary: exhaustive current/legacy/missing/malformed/future compatibility, plus a representative packaged-app open/edit/save/reopen round trip.
+
+## Exact code evidence
+
+All four named owning tests existed at the initial baseline and passed without a production change:
+
+- `applies_clip_defaults_for_omitted_fields`: PASS, 1/1.
+- `migrates_legacy_transform_xy_to_center`: PASS, 1/1.
+- `migrates_generation_log_legacy_cost_and_version`: PASS, 1/1.
+- `exhaustive_legacy_default_matrix`: PASS, 1/1.
+
+The exhaustive test covers current and legacy decoding, omitted defaults, malformed and unknown-future fail-closed branches, read-only/save-as guards, and open/edit/save/reopen persistence. Because the reviewed production boundary was already complete, the initial baseline was GREEN; no artificial failing implementation was introduced merely to satisfy the generated RED wording.
+
+## Packaged application fixture
+
+The debug macOS application opened `/private/tmp/opentake-ds-legacy-real-device.opentake`, created specifically for this acceptance run. The input intentionally omitted project dimensions, frame rate, settings state, track and clip identifiers, track flags, media type/source type, media-manifest version/folders, and generation-log version. It also used legacy transform `x/y` and legacy generation `cost` fields, and pointed at a missing external movie.
+
+The first native-open attempt deliberately selected `/private/tmp` itself and the application visibly rejected it with `missing required project.json in bundle at /private/tmp`, then returned safely to Home. Selecting the actual package opened successfully and rendered:
+
+- 1920 × 1080 at 30 fps;
+- a three-second offline-media placeholder with relink recovery;
+- synthesized track and clip identities;
+- a migrated timeline clip on V1.
+
+## Edit, save, and reopen
+
+Using only the packaged application UI, the run added a text clip and set its content to `Legacy migration verified`, returned to Home to save, and reopened the project from the recent-project card. The reopened preview rendered the exact text, the timeline retained both V1 and V2 clips, and the offline-media recovery surface remained available.
+
+The persisted JSON then proved the full representative migration:
+
+- project defaults: `width=1920`, `height=1080`, `fps=30`, `settingsConfigured=false`;
+- track defaults: generated UUIDs, `muted=false`, `hidden=false`, `syncLocked=true`;
+- clip defaults: generated UUIDs, `mediaType/sourceClipType=video`, zero trims/fades/crop, unit speed/volume/opacity;
+- transform migration: legacy `x=0.1/y=0.2` became `centerX≈0.1/centerY≈0.2`, while width/height remained `0.5`;
+- media manifest: `version=1`, `folders=[]`;
+- generation log: `version=1`, legacy `cost=0.42` became `costCredits=42`;
+- real edit: the added text clip persisted `textContent="Legacy migration verified"` and reopened visibly.
+
+Persisted artifact SHA-256 values after the successful round trip:
+
+| File | SHA-256 |
+|---|---|
+| `generation-log.json` | `2b802e37cc1eeb8ae818de7d77f3ea6e57300232050c24765704cb879fc71cae` |
+| `media.json` | `0d56801a702905b9450fa8ff0854a224560693397f81f67d66394b488b86a8c9` |
+| `project.json` | `1ce3f603dd4a12de83733817e7b6aab97a91474ae90b66ed4ca0aa461cc78986` |
+
+## Outcome
+
+Task 1 is complete: exact compatibility tests and the packaged real-device round trip agree on the same migration behavior, including visible invalid-bundle recovery. This closes one data-safety record only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-manifest-corruption-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-manifest-corruption-real-device-2026-07-31.md
new file mode 100644
index 00000000..333c5ba0
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-manifest-corruption-real-device-2026-07-31.md
@@ -0,0 +1,58 @@
+# Data safety manifest-corruption real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 9 `DS-manifest-corruption-conflict`.
+- Requirement: `requirement-7908bd026b5a91f6`.
+- Boundary: keep `project.json` and present malformed `media.json` strict; allow only malformed optional `generation-log.json` to open in an explicit write-blocked compatibility session.
+
+## Exact code evidence
+
+- `malformed_manifest_is_an_error`: PASS, 1/1.
+- `malformed_manifest_contract_matches_authoritative_source`: PASS, 1/1.
+
+The schema contract covers complete current-version open/edit/save/reopen, missing and malformed required timeline, syntactically and structurally malformed media manifests, missing-manifest default and safe creation, legacy `{}` preservation, malformed optional generation-log recovery, error priority, same-path write rejection, Save As rejection before destination creation, and full nofollow tree-receipt equality.
+
+The plan's expected-RED note described the state before the reviewed test was introduced. On the audited branch the exact test already exists (landed with the cross-cutting data-safety gates), so both focused commands are now green; no artificial failure was introduced.
+
+## Packaged malformed-media result
+
+The application was already displaying the valid generation-seed project with four media entries and two text clips. Opening `/private/tmp/opentake-ds-task9-malformed-media.opentake`, whose `media.json` contains invalid JSON, did not replace the live session:
+
+- the same four media entries remained visible;
+- the preview still rendered `Generation seed verified`;
+- both original timeline clip IDs remained present;
+- no new project, journal, staging, or sibling artifact appeared.
+
+The rejected fixture remained exactly two files with SHA-256 values:
+
+- `project.json`: `b3973a664bd87f47496250b9a32cbbd489b2d7d14e0c43fd3ff777415a2bc1e8`;
+- `media.json`: `85c606726a48c5b18880fda848fffe4cbce09090f3b96210b37b1c415fb520c1`.
+
+## Packaged malformed-generation result
+
+Opening `/private/tmp/opentake-ds-task9-malformed-generation.opentake` succeeded only as an explicit compatibility recovery session. The UI displayed:
+
+- `兼容性只读模式`;
+- one compatibility issue;
+- `generation-log.json:invalid-or-unreadable`;
+- editing and saving disabled.
+
+Clicking **添加文本** caused no accessibility-tree or timeline change. The empty timeline stayed empty. The preserved file SHA-256 values were:
+
+- `project.json`: `b3973a664bd87f47496250b9a32cbbd489b2d7d14e0c43fd3ff777415a2bc1e8`;
+- `media.json`: `8faebdcf603b7f74817d302fe63613b7547581e03e80da3fb31977abe16df1fe`;
+- damaged `generation-log.json`: `36b98fe44f4a237ff39f862cc1083270583b9bcb3127d7bf32b67bd4d4bbea46`.
+
+No rejected Save As destination or related sibling artifact existed after the run.
+
+## Regression gate
+
+- both Task 9 focused commands: PASS.
+- `cargo fmt --all -- --check`: PASS on the same source tree.
+- `cargo test --workspace --no-fail-fast --quiet`: PASS on the same source tree immediately before this evidence-only change; all executed tests passed, with only explicitly ignored tests skipped.
+- `git diff --check`: PASS.
+
+## Outcome
+
+Task 9 is complete. Exact persistence tests and the packaged application agree on strict manifest failure, incumbent-session preservation, explicit generation-log recovery, disabled mutation, and unchanged damaged bytes. This closes one data-safety record only; it does not reclassify later tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-redaction-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-redaction-real-device-2026-07-31.md
new file mode 100644
index 00000000..08be29fc
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-redaction-real-device-2026-07-31.md
@@ -0,0 +1,38 @@
+# Data safety MCP redaction real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 4 `DS-mcp-redaction`.
+- Requirement: `requirement-2e9e6066655d5846`.
+- Boundary: typed actionable MCP errors without paths, credentials, authorization headers, signed queries, provider bodies, nested source detail, or internal stack content.
+
+## Exact code evidence
+
+The exact owning test `llm_errors_redact_paths_credentials_headers_provider_bodies` passed 1/1. The complete `mcp_error_redaction` runner passed 2/2, including the multi-block test that proves text and image blocks cannot be recombined to recover private content.
+
+The matrix independently injects:
+
+- a full user-home media path;
+- an API-key-shaped value;
+- bearer and Basic authorization values;
+- a signed URL query;
+- a provider/customer response body;
+- nested decoder and stack detail;
+- split multi-block text and image content.
+
+Every wire result retains a typed code and retry remediation while removing the injected content.
+
+## Packaged application result
+
+The rebuilt debug macOS application's production MCP server received two real `import_media` calls containing the same adversarial categories:
+
+1. A nonexistent `/Users/alice/.../sk-live-.../secret.mp4` path with an `Authorization: Bearer ...` display name.
+2. A signed HTTPS URL containing `token=signed-secret&expires=999999`, with a provider-style customer/quota body in the display name.
+
+Both operations failed as intended and returned HTTP 200 MCP envelopes whose tool results were marked `isError=true`. Response bodies contained `MCP_TOOL_ERROR_REDACTED`, a unique `errorId`, and actionable retry guidance. A byte-level search across both retained responses found none of these strings: the home path, API key, bearer token, authorization label, signed token, expiry, quota text, or customer identity.
+
+The same packaged session had immediately before this check returned non-redacted success content for valid path, HTTPS, and bytes imports. This proves the sanitizer is conditional at the LLM boundary rather than suppressing all useful tool output.
+
+## Outcome
+
+Task 4 is complete: adversarial automated coverage and the packaged MCP wire agree on typed, actionable, fail-closed redaction. This closes one data-safety record only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-tool-import-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-tool-import-real-device-2026-07-31.md
new file mode 100644
index 00000000..1f7e59e8
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-tool-import-real-device-2026-07-31.md
@@ -0,0 +1,47 @@
+# Data safety MCP tool import real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 3 `DS-mcp-tool-import`.
+- Requirement: `requirement-d317ca3e45fba737`.
+- Boundary: strict tool arguments plus path, inline-byte, and HTTPS media import with fail-closed staging and publication.
+
+## Exact code evidence
+
+Three dispatcher tests and the production URL-import test passed:
+
+- `import_media_requires_exactly_one_source`: PASS, 1/1.
+- `import_media_rejects_unknown_nested_source_key`: PASS, 1/1.
+- `import_media_bytes_rejects_oversized_base64_before_bridge`: PASS, 1/1.
+- `https_url_import_enforces_scheme_mime_and_decoded_limit`: PASS, 1/1.
+
+The initial command for `all_tool_schemas_reject_unknown_missing_wrong_type -- --exact` reported success but executed zero tests because the owning test had an extra `_and_nonfinite` suffix. The test was renamed to the exact plan-declared name without weakening its assertions; the corrected command then passed 1/1 and still covers non-finite numbers in addition to unknown, missing, wrong-root, wrong-type, and nested-field cases.
+
+The URL test covers HTTPS/userinfo/redirect restrictions, response and override MIME resolution, extension/container conflicts, Content-Length and streamed decoded-byte ceilings, cancellation, probe failure, manifest-writer failure, retained staging identity, successful publication, and reopen persistence.
+
+## Packaged application result
+
+The rebuilt debug macOS application opened the retained Task 3 fixture and exposed the production MCP bridge at `127.0.0.1:19789`.
+
+Invalid live calls used no source, two sources, an unknown nested source key, and a plain-HTTP URL. Every request returned an MCP error and the media manifest remained at one entry. The unknown nested key was reported as `MCP_INVALID_ARGUMENTS`; private operational failures were redacted with an error identifier.
+
+The valid paths then succeeded through the same live server:
+
+| Source | Runtime result |
+|---|---|
+| Absolute path WAV | Imported as `Task3 Path Music`; one-second waveform appeared in the media panel |
+| HTTPS PNG | Downloaded from `raw.githubusercontent.com`, probed as `image/png`, retained 12,746 bytes in the project, and appeared as `Task3 HTTPS Rust` |
+| Base64 PNG | Decoded 68 bytes, retained in the project, and appeared as `Task3 Inline PNG` |
+
+An initial Wikimedia image request received a source-server HTTP 403. OpenTake returned a redacted failure and left the manifest unchanged. Repeating the acceptance run with an HTTPS source that permits programmatic downloads succeeded, distinguishing external rejection from an import defect.
+
+After returning Home to save, `media.json` contained four entries: the original offline fixture, the external path WAV, and two project-retained images. The retained files were present at their declared relative paths:
+
+| Artifact | SHA-256 |
+|---|---|
+| HTTPS PNG | `cf78cef9ba96a43bda7254c0ffb10b9faffd075997ca6b7bd89df1c64e3c5605` |
+| Inline PNG | `e4bff65a73fef402fa8fbd4f4cc20d774df30ad45315617efec31455aa3fe1f0` |
+
+## Outcome
+
+Task 3 is complete: exact schemas, failure isolation, three real import modes, retained publication, disk persistence, and the visible media panel agree. This closes one data-safety record only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-transport-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-transport-real-device-2026-07-31.md
new file mode 100644
index 00000000..b4a72e84
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-mcp-transport-real-device-2026-07-31.md
@@ -0,0 +1,42 @@
+# Data safety MCP transport real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 2 `DS-mcp-transport`.
+- Requirement: `requirement-473d4379da3bd4cc`.
+- Boundary: loopback-only startup, DNS-rebinding guards, request-size limit, and MCP protocol-version validation.
+
+## Exact code evidence
+
+All four named HTTP integration tests existed at the initial baseline and passed independently:
+
+- `non_local_origin_is_rejected`: PASS, 1/1.
+- `oversized_request_body_is_rejected`: PASS, 1/1.
+- `serve_rejects_non_loopback_bind`: PASS, 1/1.
+- `unsupported_protocol_version_is_400`: PASS, 1/1.
+
+The tests drive the actual axum/Streamable HTTP router. Their mutation counters prove rejected Origin, Host, protocol-version, and oversized-body requests never reach tool dispatch. The production implementation also rejects a caller-supplied non-loopback bind before creating a listener.
+
+Because the reviewed production boundary was already complete, the initial baseline was GREEN; no artificial failing implementation was introduced merely to satisfy the generated RED wording.
+
+## Packaged application result
+
+The rebuilt debug macOS application exposed its MCP instructions in Settings, including the exact endpoint `http://127.0.0.1:19789/mcp`, client setup commands, and the visible statement that the server binds only to `127.0.0.1` while the application is running.
+
+The running packaged process was then checked through its real TCP endpoint:
+
+| Probe | Result |
+|---|---|
+| Listener inspection | `opentake` listening on `TCP 127.0.0.1:19789`, IPv4 loopback only |
+| Valid MCP `initialize` with JSON + SSE accept types | HTTP 200, protocol `2025-06-18`, server `opentake` version `1.0.0` |
+| Valid session `tools/list` | HTTP 200 and production tool catalog returned |
+| `Origin: http://evil.example.com:19789` | HTTP 403 |
+| `Host: 127.0.0.1.evil:19789` | HTTP 403 |
+| `MCP-Protocol-Version: 1900-01-01` | HTTP 400 |
+| Body larger than the 16 MiB request ceiling | HTTP 413 |
+
+The live `tools/list` response included timeline reads, media inspection/search, clip/track edits, undo, text/captions, and beat-detection tools. This demonstrates that the valid path reached the packaged server while each invalid transport path was rejected at the boundary.
+
+## Outcome
+
+Task 2 is complete: the exact owning tests and the packaged TCP server agree on loopback binding and every required request guard. This closes one data-safety record only; it does not reclassify the remaining data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-project-open-composite-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-project-open-composite-real-device-2026-07-31.md
new file mode 100644
index 00000000..81c52f38
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-project-open-composite-real-device-2026-07-31.md
@@ -0,0 +1,53 @@
+# Data safety project-open composite real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 8 `DS-project-open-composite-headings`.
+- Requirements: `requirement-6748d221ef0d9a4c`, `requirement-9335bc98b18f8d8d`, `requirement-706e744a85684655`, and `requirement-b38818cf815e0f1e`.
+- Boundary: validate and prepare a complete project candidate, admit playback/prewarm, atomically publish one runtime snapshot, then expose it consistently to media, render, playback, captions, and Agent/MCP consumers.
+
+## Exact code evidence
+
+All nine reviewed owning tests passed exactly:
+
+- `exhaustive_legacy_default_matrix`: PASS, 1/1.
+- `missing_generation_log_seeds_manifest_provenance_once`: PASS, 1/1.
+- `project_open_composite_acceptance`: PASS, 1/1.
+- `deferred_apply_rejects_version_and_project_drift_without_mutation`: PASS, 1/1.
+- `app_core_media_path_stress_never_mixes_project_snapshots`: PASS, 1/1.
+- `caption_commit_rejects_stale_project_revision`: PASS, 1/1.
+- `project_open_mapped_boundaries_composite_acceptance`: PASS, 1/1.
+- `prewarm_rejection_restores_active_playback_without_project_publish`: PASS, 1/1.
+- `transcript_batch_resolution_uses_one_snapshot_and_authoritative_types`: PASS, 1/1.
+
+Together these tests exercise current and legacy input, missing optional files, malformed media rejection without mutation, generation-log seeding, byte-stable save/reopen, prepared-versus-committed publication, stale deferred writes, concurrent Agent path reads, caption revision drift, prewarm rejection and incumbent playback recovery, plus consistent UI-media/render/playback/Agent projections from one production runtime snapshot.
+
+The owning implementation and tests were already green at the audited baseline; no artificial RED failure was introduced.
+
+## Packaged application evidence
+
+The packaged debug application supplied complementary user-visible coverage through two independent real bundle round trips:
+
+1. `/private/tmp/opentake-ds-legacy-real-device.opentake` opened with omitted legacy fields, synthesized defaults and IDs, migrated transforms and generation cost, an offline-media recovery surface, and a visible timeline. A text edit saved and reopened with exact persisted semantics.
+2. `/private/tmp/opentake-ds-generation-seed-real-device.opentake` opened with four manifest assets and no generation log. The UI exposed every media entry, deterministically seeded two unique generation records, excluded imported provenance, saved a text edit, and reopened byte-stably without duplicate history.
+
+The deliberately invalid selection of `/private/tmp` failed visibly with `missing required project.json in bundle at /private/tmp` and returned safely to Home. The malformed generation fixture also failed without replacing the live session; after correcting the fixture, the same packaged process opened successfully.
+
+While the second project remained open, the live production MCP server read the same two desktop timeline clips, added a third clip, and undid it. The desktop UI immediately converged back to those same two clips. This directly verifies that desktop and Agent consumers observe the committed shared core session, not separate placeholder state.
+
+Detailed child evidence is retained in:
+
+- `data-safety-legacy-default-matrix-real-device-2026-07-31.md`;
+- `data-safety-generation-seed-real-device-2026-07-31.md`;
+- `data-safety-shared-core-command-real-device-2026-07-31.md`.
+
+## Regression gate
+
+- all nine Task 8 focused commands: PASS.
+- `cargo fmt --all -- --check`: PASS on the same source tree.
+- `cargo test --workspace --no-fail-fast --quiet`: PASS on the same source tree immediately before this evidence-only change; all executed tests passed, with only explicitly ignored tests skipped.
+- `git diff --check`: PASS.
+
+## Outcome
+
+Task 8 is complete. Deterministic failure injection and two packaged-app round trips agree that project open is validated before publication, failure preserves the incumbent session and bytes, and every mapped consumer reads one committed snapshot. This closes four composite records only; it does not reclassify later data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-shared-core-command-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-shared-core-command-real-device-2026-07-31.md
new file mode 100644
index 00000000..463307ba
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-shared-core-command-real-device-2026-07-31.md
@@ -0,0 +1,49 @@
+# Data safety shared core command real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `data-safety-implementation.md`, Task 7 `DS-shared-core-command-complete`.
+- Requirements: the 10 records mapped to the shared `EditorState` / `EditCommand` / `AppCore` / `EventBus` command path.
+- Boundary: versioned command application, unchanged-command handling, undo/redo, and convergence between the packaged desktop client and live MCP client.
+
+## Exact code evidence
+
+- `commit_undo_redo_cycle_restores_and_versions`: PASS, 1/1.
+- `apply_bumps_version_and_emits_once`: PASS, 1/1.
+- `unchanged_command_does_not_emit_or_bump`: PASS, 1/1.
+- `undo_redo_through_core_bumps_version_and_emits`: PASS, 1/1.
+
+These owning tests prove that committed edits bump the shared revision and emit once, unchanged commands neither bump nor emit, and undo/redo restore state while producing versioned results. They were already green at the audited baseline; no artificial RED failure was introduced.
+
+## Packaged desktop command result
+
+The debug packaged application opened `/private/tmp/opentake-ds-generation-seed-real-device.opentake`, initially containing the persisted text clip `Generation seed verified`. Using the production desktop controls:
+
+1. **Add Text** created a second clip with ID `29f96e16-4133-440c-acf5-2733b28f23a8`.
+2. **Undo** removed that clip and enabled Redo.
+3. **Redo** restored the same clip ID and disabled Redo.
+
+The resulting timeline visibly contained exactly the two expected text clips.
+
+## Live MCP command result
+
+Against the same running packaged process and project, the production MCP transport returned:
+
+- initial `get_timeline`: 90 total frames and two clips (`29f96e16`, `fd55ad76`);
+- `add_texts`: added `Agent shared path` as clip `99b61c61` at frame 90 for 30 frames;
+- next `get_timeline`: 120 total frames and three clips;
+- `undo`: returned `Undid last edit`;
+- final `get_timeline`: restored 90 total frames and exactly the original two clip IDs.
+
+The already-open desktop UI updated live after the MCP undo: it showed the same two clips and enabled Redo. This demonstrates that desktop and Agent/MCP edits converge through the shared production command/history path rather than maintaining isolated client state.
+
+## Regression gate
+
+- `cargo fmt --all -- --check`: PASS.
+- all four focused owning tests: PASS.
+- `cargo test --workspace --no-fail-fast --quiet`: PASS; all executed workspace tests passed, with only the repository's explicitly ignored tests skipped.
+- `git diff --check`: PASS.
+
+## Outcome
+
+Task 7 is complete. The exact Rust version/event contracts and two real packaged clients agree on edit, undo, redo, identity restoration, and visible state. This closes the 10 mapped records only; it does not reclassify later data-safety tasks or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-windows-safe-fs-native-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-windows-safe-fs-native-2026-07-31.md
new file mode 100644
index 00000000..d3f025ca
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/data-safety-windows-safe-fs-native-2026-07-31.md
@@ -0,0 +1,58 @@
+# Data Safety Task 12 — native Windows safe-fs receipt (2026-07-31)
+
+Status: **native implementation and focused Windows acceptance complete; whole-workflow and independent-review closure pending.**
+
+## Bound contract
+
+- Plan: `data-safety-implementation.md`, Task 12
+  (`implementation-slice-c7f1cd8463f97ad5`).
+- Exact tests:
+  `crates/opentake-project/src/safe_fs/tests.rs#windows_contract` and
+  `crates/opentake-project/src/safe_fs/tests.rs#synchronous_nt_pending_is_invariant_error`.
+- Exact source SHA: `a1e9fd0ba30ac3471dd106dbe5307f18c49cf5ee`.
+
+## Native Windows receipt
+
+- Workflow: [run 30617000877](https://github.com/appergb/OpenTake/actions/runs/30617000877).
+- Job: [Safe filesystem (windows-x86_64)](https://github.com/appergb/OpenTake/actions/runs/30617000877/job/91112395644), success.
+- Artifact: `c1b-native-windows-x86_64-a1e9fd0ba30ac3471dd106dbe5307f18c49cf5ee`, ID `8787791443`, 3,197 bytes, server digest `sha256:ed079ecf16dacc28a3f1f6775d295ddf5a5ed699869994591f90d5387991ed60`.
+- Receipt binds both `requested_sha` and `checked_out_sha` to the exact source
+  SHA, run attempt 1, Windows Server 2022 x64, and aggregate exit 0.
+
+All retained command exits were zero:
+
+```text
+cargo fmt --all --check                                           0
+cargo clippy -p opentake-project --lib --tests -- -D warnings     0
+cargo test -p opentake-project --lib safe_fs -- --test-threads=1  0
+cargo test -p opentake-project --test archive_security -- --test-threads=1  0
+```
+
+The native safe-fs runner executed 26 tests with 26 passed, 0 failed. This
+includes both exact Task 12 tests plus retained-handle I/O, owner-only DACL
+validation and malformed descriptor rejection, same-handle rollback at every
+post-create validation point, quarantine/publish without self-conflict,
+no-replace rename against every target kind, recursive reparse-point cleanup,
+access non-escalation, and retained deletion without following a rebound source
+name.
+
+## Pre-GREEN failure and correction
+
+The prior exact run
+[30616574158](https://github.com/appergb/OpenTake/actions/runs/30616574158)
+retained all four command exits and failed the aggregate because one newly
+added test required a leaf rename even when the filesystem rejected the
+same-handle simulation with `STATUS_SHARING_VIOLATION`. A later parallel suite
+also proved that Windows can allow that same simulation after the retained open.
+The corrected test accepts both native outcomes while asserting the security
+invariant in each: if rebinding is blocked, the original name disappears; if it
+succeeds, consuming deletion removes the retained original and preserves the
+new replacement at that name. Production share or deletion behavior was not
+weakened to make the test pass.
+
+## Remaining closure
+
+The focused native contract is GREEN. Task 12 remains open until the remaining
+Windows jobs and the whole exact-SHA workflow finish successfully and the
+plan's independent-review criterion has a valid receipt. This file therefore
+does not authorize Beta publication by itself.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/denoise-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/denoise-real-device-2026-08-01.md
new file mode 100644
index 00000000..3a4328a1
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/denoise-real-device-2026-08-01.md
@@ -0,0 +1,62 @@
+# MR-denoise real-device evidence — 2026-08-01
+
+## Scope and acceptance
+
+- Plan task: `Task 12: MR-denoise (implementation-slice-3d159672cfd1fc67)`.
+- Contract: persist mode/strength without modifying the source; expose preview, apply/reset, cancellation and undo/redo; use the same processing owner in preview and export; improve a deterministic speech-plus-noise fixture by at least 3 dB without clipping.
+- Runtime target: rebuilt release bundle at `target/release/bundle/macos/OpenTake.app`.
+
+## TDD and code verification
+
+- Initial RED: the three reviewed owning tests could not compile because the shared denoise processing owner and domain contract did not exist.
+- Regression RED: after the first packaged export exposed an AAC peak near 0 dBFS, `deterministic_noise_fixture_and_bypass` gained a no-new-peak assertion and failed with `input=0.388362`, `output=1.000000`.
+- GREEN: unpadded STFT boundary samples now crossfade to the immutable dry input, and processed samples are bounded by the input peak. Focused media, playback-owner and export-owner tests passed.
+- `CARGO_INCREMENTAL=0 cargo test --workspace --no-fail-fast --quiet`: PASS.
+- `cargo clippy --workspace --all-targets -- -D warnings`: PASS.
+- `cargo fmt --all -- --check`: PASS.
+- `git diff --check`: PASS.
+- `pnpm -C web test`: PASS, 91 files / 818 tests.
+- `pnpm -C web build`: PASS; only the pre-existing chunk-size and ineffective-dynamic-import warnings were reported.
+
+The first full gate attempt stopped because the regenerable dev target cache filled the disk. `cargo clean --profile dev` recovered 16 GiB; the complete gate was then rerun from the beginning and passed.
+
+## Package identity
+
+- Executable SHA-256: `d9bac8eb031345b02239e9ddb63588fd780eebba70652134ee1e98947e5506a1`.
+- Bundle identifier: `com.opentake.desktop`.
+- CDHash: `cffb5e7d81e609ce5d1092ee28af718fc8f70988`.
+- `codesign --verify --deep --strict --verbose=2`: PASS for the app and bundled `ffmpeg`/`ffprobe` sidecars.
+- Signature: ad hoc (`TeamIdentifier=not set`). This proves package integrity for local runtime validation, not Developer ID distribution readiness or Beta publication eligibility.
+
+## Deterministic fixtures
+
+- Clean reference: `/private/tmp/opentake-denoise-clean-20260801.wav`, SHA-256 `3b0fd01951c94ceea1536c9a8d5e6af53b716fba1c5260e5f03ad10ef88c33b4`.
+- Noisy input: `/private/tmp/opentake-denoise-noisy-20260801.wav`, SHA-256 `a6011c2dd045e7222cd91c3d4b64916c51f4d2210a685334f71070a0a14084ed`.
+- Cancellation input: `/private/tmp/opentake-denoise-noisy-long-20260801.wav`, 300 seconds, SHA-256 `5b766d758f3b1edfb9dacf36c2f3019c029829a03d22931d3a3d704f5469fda5`.
+- All inputs are mono 48 kHz PCM float. The five-second fixture combines a speech-envelope sine signal with deterministic white noise.
+
+## Packaged desktop workflow
+
+The exact release bundle was launched through the macOS accessibility-driven desktop path. In project `/private/tmp/opentake-denoise-real-device-20260801.opentake`:
+
+1. Imported the deterministic noisy fixture and added it to A1.
+2. Applied adaptive mode at 90%; toggled preview off/on; confirmed native playback advanced; verified undo/redo restored the preview state.
+3. Saved, quit, relaunched the exact bundle, opened the recent project, and confirmed adaptive/90% persisted in a writable project.
+4. Reset denoise and undid reset, restoring the prior configuration.
+5. Added the 300-second fixture, observed asynchronous progress at 56%, cancelled, and confirmed the clip remained unapplied with no error or stale denoise configuration; then removed the long timeline clip.
+6. In the rebuilt fixed package, applied voice mode at 84%, confirmed the result label, and undid it back to adaptive/90%.
+7. Exported while preview was deliberately disabled, proving preview bypass does not bypass export processing.
+
+## Independent output measurements
+
+- Final export: `/private/tmp/opentake-denoise-real-device-v2-20260801.mp4`.
+- SHA-256: `2ab36d02bbf2cbb4a1af74df901741b75d7d9ea9bcd9f749e89c02f033701d07`.
+- `ffprobe`: H.264 1920×1080 at 30 fps; mono AAC at 48 kHz; duration 5.000 seconds; size 62,215 bytes.
+- FFmpeg `asdr`, clean reference versus noisy input: `10.414 dB`.
+- FFmpeg `asdr`, clean reference versus exported AAC: `16.2872 dB`.
+- Improvement: `+5.8732 dB`, exceeding the required `+3 dB`.
+- FFmpeg `astats` exported peak: `-8.645324 dBFS`; no clipping and no boundary peak regression.
+
+## Result
+
+PASS for Task 12's code and packaged macOS runtime acceptance contract. This evidence closes only MR-denoise; it does not remove repository-wide Beta blockers or authorize publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/ffmpeg-license-replacement-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/ffmpeg-license-replacement-2026-08-01.md
new file mode 100644
index 00000000..05aedbe7
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/ffmpeg-license-replacement-2026-08-01.md
@@ -0,0 +1,48 @@
+# Apple Silicon FFmpeg license replacement — 2026-08-01
+
+## Scope
+
+This evidence closes the Apple Silicon `--enable-nonfree` sidecar blocker for the
+first local Beta candidate. It does not close the native Windows or Intel macOS
+sidecar checks, Developer ID signing, notarization, or final packaged-app
+verification.
+
+## Pinned supply
+
+The Apple Silicon lock records pin both the downloaded archive and the exact
+extracted executable:
+
+| Tool | Source | Archive SHA-256 | Executable SHA-256 |
+| --- | --- | --- | --- |
+| FFmpeg 7.0 | `https://www.osxexperts.net/ffmpeg7arm.zip` | `563111a239fe70d2e5c84a5382204a7d0bf0a332385a92a44baff36d313e27f2` | `326895b16940f238d76e902fc71150f10c388c281985756f9850ff800a2f1499` |
+| FFprobe 7.0 | `https://www.osxexperts.net/ffprobe7arm.zip` | `e5ae34ee2f0b3594892a695fd733646904bbc7eb40af3b359ed91538ddcb5513` | `307e09bc01bd72bde5f441a1a6df68769da3b2b6e431accfbfc9cf3893ad00c4` |
+
+Both executables report a GPL configuration without `--enable-nonfree`; their
+`-L` output does not contain FFmpeg's non-redistributable warning.
+
+## Fail-closed supply verification
+
+`scripts/provision_ffmpeg_sidecars.py` now verifies the archive hash, requires
+the one pinned ZIP member, enforces an extraction-size ceiling, verifies the
+executable hash, and runs the executable license/configuration checks before it
+can replace the destination. Verification rejects `--enable-nonfree` and the
+phrase `not legally redistributable`.
+
+The Python regression suite passed all four cases covering lock validation,
+pinned ZIP extraction, archive mismatch rejection, and license rejection.
+
+## Media compatibility gate
+
+With the two pinned Apple Silicon executables selected explicitly through
+`OPENTAKE_FFMPEG` and `OPENTAKE_FFPROBE`, `cargo test -p opentake-media
+--no-fail-fast` passed. This covered 401 unit tests (one separately gated test
+ignored), 13 FFmpeg integration tests (one external-fixture test ignored), plus
+the denoise, facade, HDR, loudness, proxy, and stems test binaries. The real
+sidecar paths exercised probing, RGBA frame decoding, PCM extraction,
+thumbnails, waveforms, H.264, H.265, ProRes, HDR, and proxy generation.
+
+The final Beta gate must still recheck the pinned source hashes before signing,
+then prove the embedded executables retain the expected version and license
+metadata, pass code-sign validation, and work with an empty `PATH`. macOS code
+signing mutates Mach-O bytes, so the post-signing executable hash is not expected
+to equal the pre-signing supply hash.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/five-panel-layout-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/five-panel-layout-real-device-2026-07-31.md
new file mode 100644
index 00000000..32f2185c
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/five-panel-layout-real-device-2026-07-31.md
@@ -0,0 +1,71 @@
+# Five-panel layout packaged macOS evidence — 2026-07-31
+
+## Scope
+
+- Plans: `home-shell-implementation.md` Task 5 `HS-layout-geometry + CC-layout-misgrouped`; `accessibility-polish-implementation.md` Task 9 `five-panel-layout-focus`
+- App: `target/debug/bundle/macos/OpenTake.app`
+- Project: `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`
+- Host: packaged macOS app, exercised through the native accessibility tree and captured screenshots
+- Locale/theme/fixture: Chinese, dark theme, the same TalkingHeadQA project throughout
+- Executable SHA-256: `3c7b66247716f17ba38ca4ae1d46320c6f3211273112c3be22e21bdcd267862f`
+- Debug DMG SHA-256: `d15d7dc7f77f16fac3b27da37abd8276c07c73813287cf7a1977aded30a4d435`
+
+## Deterministic code contract
+
+The two exact owning names execute the same full matrix so the Home Shell and
+Accessibility ledgers cannot drift:
+
+- `all_presets_match_geometry_visibility_maximize_and_focus_shell`
+- `all_presets_ratios_gutters_surfaces_focus`
+
+At 1600×1000 the matrix proves Default 70%, Media 30%/55%, Vertical 50%/55%,
+500px Media, 260px Inspector, 320px Agent, leaf order, visibility, focus-ring
+transition, click side effects, maximize, and separator keyboard resizing. At
+960×600 it proves the compact boundary keeps Preview and Timeline available
+with both collapsible side panels hidden. PanelShell uses the shared 5px gap,
+6px radius, surface/base tokens, and 1.5px accent focus ring at opacity 0.6.
+
+## Gates
+
+- True focused RED: the Home Shell owning name failed while all prior 747 Web
+  tests passed because the layout had no declared preset boundary, semantic
+  panel/splitter contract, or complete collapse behavior.
+- Both exact focused GREEN names passed independently (1 executed / 1 skipped
+  in the shared two-name matrix).
+- Full Web regression: 75 files / 749 tests passed.
+- TypeScript/Vite production build passed. Its existing bundle-size and
+  ineffective-dynamic-import warnings were unchanged and non-blocking.
+- `./web/node_modules/.bin/tauri build --debug` passed and produced the exact app
+  and DMG identified above.
+- `git diff --check` passed.
+
+## Packaged sequence
+
+1. Quit the prior process and launched the exact rebuilt app bundle, then opened
+   TalkingHeadQA from Home.
+2. Default exposed Media / Preview / Inspector above Timeline. The accessibility
+   splitters reported 500px Media, 260px right anchoring through the measured
+   center split, and a 70% top split; the screenshot showed uninterrupted 5px
+   base grooves and rounded surface cards.
+3. Clicking Media moved the 0.6-opacity accent ring from Timeline to Media.
+4. `⌘2` applied Media layout: Media occupied 30% at left; Preview / Inspector
+   occupied the 55% upper-right region; Timeline filled the lower-right region.
+5. `⌘3` applied Vertical layout: the left subtree occupied 50%, its upper
+   Media / Inspector region occupied 55%, Timeline remained below, and Preview
+   filled the complete right side.
+6. `⌘⌥0` collapsed Inspector. Media expanded across the complete upper-left
+   region with no empty sibling split. `⌘0` then collapsed Media; only the
+   non-collapsible Timeline and Preview regions remained.
+7. Restored Media and Inspector and enabled Agent with `⌘⌥A`. The accessibility
+   tree exposed all five localized regions plus four localized splitters,
+   including the 320px Agent column.
+8. Clicked Preview and pressed backquote. Only Preview remained and filled the
+   editor body. Escape restored all five panels.
+9. Restored Default layout, Agent hidden, Media and Inspector visible, and
+   non-maximized state for the final packaged app state.
+
+The host display constrains the native window below an unscaled 1600×1000
+capture, so exact 1600×1000 and 960×600 geometry is owned by the deterministic
+component fixtures; the packaged screenshots cover the same three presets and
+state transitions at the largest host-available window. No project, timeline,
+media, or external file was mutated by this verification.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-export-2026-07-31.mp4 b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-export-2026-07-31.mp4
new file mode 100644
index 00000000..ce85ce36
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-export-frame-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-export-frame-2026-07-31.png
new file mode 100644
index 00000000..45ff166e
Binary files /dev/null and b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-export-frame-2026-07-31.png differ
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-packaged-ui-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-packaged-ui-2026-07-31.png
new file mode 100644
index 00000000..59f09b91
Binary files /dev/null and b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-packaged-ui-2026-07-31.png differ
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-preview-frame-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-preview-frame-2026-07-31.png
new file mode 100644
index 00000000..957d0284
Binary files /dev/null and b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-preview-frame-2026-07-31.png differ
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-real-device-2026-07-31.md
new file mode 100644
index 00000000..918202e6
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/generic-effects-real-device-2026-07-31.md
@@ -0,0 +1,111 @@
+# Generic Effects Real-Device Verification — 2026-07-31
+
+## Scope and contract
+
+- Plan item: `MR-generic-effects` / Task 6.
+- Closed persisted registry: `grayscale`, `sepia`, `invert`.
+- Each effect accepts an optional finite `amount` in `0.0..=1.0` (default `1.0`).
+- Unknown effect names, unknown parameters, non-finite values, out-of-range values, and chains longer than eight return typed validation errors. They do not silently render unchanged.
+- Inspector add, reorder, parameter, enable/disable, and remove mutations route through the undoable `SetEffects` command.
+- Preview and export use the same ordered GPU effect implementation.
+
+## Reviewed RED/GREEN owning test
+
+Owning test:
+
+```text
+crates/opentake-render/tests/gpu_effects.rs#advertised_effect_registry_has_preview_export_golden_fixtures
+```
+
+The required focused command was first run before implementation and failed to compile because `effect_registry` and `Effect::validate` did not exist. After implementation, the exact command passed:
+
+```sh
+cargo test -p opentake-render --test gpu_effects advertised_effect_registry_has_preview_export_golden_fixtures -- --exact
+```
+
+The test asserts the exact registry, default and non-default golden pixels for every advertised effect, observable chain order, fresh preview/export byte equality, and typed rejection of an unknown effect.
+
+## Code and package gates
+
+All gates completed successfully on the source used for this app bundle:
+
+- `npm test`: 89 test files and 807 tests passed.
+- `npm run build`: passed; only the repository's existing chunk-size warnings were emitted.
+- `cargo fmt --all -- --check`: passed.
+- `cargo clippy --workspace --all-targets -- -D warnings`: passed; Cargo only reported the pre-existing `block 0.1.6` future-incompatibility notice.
+- `cargo test --workspace --no-fail-fast`: passed; explicit real-device tests remained ignored as designed.
+- `web/node_modules/.bin/tauri build --bundles app --no-sign`: passed.
+
+Packaged binary:
+
+```text
+target/release/bundle/macos/OpenTake.app/Contents/MacOS/opentake
+SHA-256 a4b77109d9b59a264c7657fa71d3aaaad8655d73669b7f922604e5dfeb1f17f3
+```
+
+`codesign --verify --deep --strict --verbose=2` passed for the app and bundled `ffmpeg`/`ffprobe`. The inspected signature is ad hoc (`Signature=adhoc`, no TeamIdentifier); this is local integrity evidence only, not Developer ID signing or notarization evidence.
+
+## Packaged macOS GUI workflow
+
+The packaged app was operated through macOS accessibility/Computer Use against an isolated copy of the real `TalkingHeadQA` project:
+
+```text
+/private/tmp/opentake-generic-effects-real-device-20260731.opentake
+```
+
+Observed sequence:
+
+1. Selected visual clip `id-4` and added grayscale at 41%, then sepia.
+2. Moved sepia above grayscale; undo restored the prior order and redo restored the new order.
+3. Disabled and re-enabled grayscale.
+4. Removed sepia and used undo to restore it.
+5. Added invert, producing the ordered enabled chain `sepia(1.0) -> grayscale(0.41) -> invert(1.0)`.
+6. Native playback advanced the playhead without an unsupported-effect error and the rendered preview visibly changed from the blue source to the expected light grayscale/inverted result.
+7. Saved, returned home, and reopened the project from Recent. The exact chain, parameter, and enabled states persisted; undo and redo were disabled on this fresh project session.
+8. Captured frame 0 through the app's native “capture current frame” action and exported the full timeline through the packaged H.264/1080p UI path.
+
+Persisted `project.json` SHA-256:
+
+```text
+138ce3e2a7f7fb409a742119e987f8b1b70c9b5e65a967cf8d4fbfc427226aac
+```
+
+The persisted clip payload was inspected directly and contained:
+
+```json
+{
+  "id": "id-4",
+  "mediaRef": "id-1",
+  "effects": [
+    { "name": "sepia", "params": {}, "enabled": true },
+    { "name": "grayscale", "params": { "amount": 0.41 }, "enabled": true },
+    { "name": "invert", "params": {}, "enabled": true }
+  ]
+}
+```
+
+## Export and preview parity
+
+Bundled `ffprobe` reported the UI-exported artifact as H.264 video plus AAC audio, 1920×1080, 30 fps, 920 video frames, and 30.666667 seconds. SHA-256:
+
+```text
+7af20a51688ff3d2522e318ffeb16f126d1fd55d8bcf5df461de1f2696609fab
+```
+
+The native preview capture and decoded export frame 0 are both 1920×1080. Bundled `ffmpeg` comparison produced:
+
+```text
+SSIM All: 0.999838 (37.902042)
+PSNR average: 39.679823 dB
+```
+
+The small non-zero delta is consistent with H.264 encoding; both frames show the same ordered effect result. Exact uncompressed preview/export byte equality is separately enforced by the owning GPU test.
+
+## Evidence artifacts
+
+- `generic-effects-packaged-ui-2026-07-31.png` — reopened packaged UI showing the persisted ordered chain and 41% parameter.
+- `generic-effects-preview-frame-2026-07-31.png` — native packaged-app frame capture.
+- `generic-effects-export-2026-07-31.mp4` — full packaged-app H.264 export.
+- `generic-effects-export-frame-2026-07-31.png` — decoded export frame 0 used for parity measurement.
+
+This evidence completes Task 6 only. It does not close the project-wide Developer ID/notarization, Windows real-device, CI-dispatch, or Beta-release gates.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md
new file mode 100644
index 00000000..e5d23ce0
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/hdr-proxy-account-real-device-2026-08-01.md
@@ -0,0 +1,195 @@
+# HDR / proxy / account packaged real-device evidence — 2026-08-01
+
+Parent: `MR-hdr-proxy-account-composite`
+
+Environment: macOS arm64, packaged `target/release/bundle/macos/OpenTake.app`,
+bundled FFmpeg/FFprobe, Chinese UI. All desktop interaction below was performed
+through the packaged GUI; shell probes only generated fixtures or inspected the
+resulting project/output artifacts.
+
+## Packaged artifact under test
+
+- Executable SHA-256: `38c3c1c2aec593d8b9fea79691cec0eb69fdad5d5eae6e193897fcc4ae65cf95`
+- DMG SHA-256: `8a317e64d60ec78a67a096bff7eab5b57d56117a68c863563e5e8020eaefeae2`
+- Whole `.app` and the app copied from the rebuilt DMG pass
+  `codesign --verify --deep --strict`.
+- Signature is ad hoc (`Signature=adhoc`, `TeamIdentifier=not set`). This is
+  local verification evidence, not Developer ID/notarization evidence.
+
+## HDR child
+
+Fixture:
+
+- `/private/tmp/opentake-task15-hdr-pq-20260801.mp4`
+- SHA-256: `52cd239ae9f29dd9e990a914b00c01e075d66e3283d1644372aaa942f818ce11`
+- HEVC Main10, 640x360, `bt2020nc / smpte2084 / bt2020`.
+
+Packaged GUI evidence:
+
+- Import persisted the exact source metadata in `media.json`.
+- Source Inspector displayed `HDR 色彩` and
+  `smpte2084 · 预览与导出映射为 BT.709 SDR`.
+- Double-click insertion created a 48-frame clip at 24 fps.
+- Timeline preview rendered the color test frame and playback advanced from
+  `00:00:00` to `00:01:06 / 00:02:00`.
+- GUI export completed as `1280×720 · 48 帧`.
+
+The first packaged export exposed a real defect: it produced a 4,215-byte,
+all-black H.264 file (SHA-256
+`97a4035e2f35429609e7ba5ad69cafce6521581866cc45a86ad1b482f1eb812f`,
+Y=16..16). The active developer FFmpeg exposes `scale_vt`, while the bundled
+sidecar exposes `zscale`; the old implementation selected by OS instead of the
+actual binary capability. A full-timeline regression test reproduced RGB
+`0..=0` with the bundled sidecar. Runtime filter detection fixed the path and
+the same test passed.
+
+Final packaged GUI output:
+
+- `/private/tmp/opentake-task15-hdr-export-fixed-20260801.mp4`
+- SHA-256: `58a40abad454a5126360f9f7cd3d9a87716f6587958fb8c28ba8ae68a223b13e`
+- H.264, 1280x720, 2.000 s, yuv420p.
+- `color_space=bt709`, `color_transfer=bt709`,
+  `color_primaries=bt709`.
+- Decoded signal range Y=15..249 with non-zero saturation; the fixed delivery
+  retains picture contrast and is not a black fallback.
+
+Focused checks:
+
+- `cargo test -p opentake-media --test hdr` — 3 passed.
+- `cargo test -p opentake-media color::tests::` — 2 passed.
+- Full HDR timeline export with `OPENTAKE_FFMPEG` and `OPENTAKE_FFPROBE`
+  pointed at the packaged sidecars — passed after reproducing the RED failure.
+
+HDR child result: **PASS** for the declared v1 SDR-delivery policy. This is not
+an HDR-passthrough claim.
+
+## Proxy child
+
+Fixture and generated proxy:
+
+- Original source:
+  `/private/tmp/opentake-task15-proxy-source-20260801.mp4`
+- Original SHA-256:
+  `633043ad47858461c8939a3e57634c1070fbb219fa66e0021d434cd1836a8ca4`
+- Source: H.264 1920x1080 plus AAC, 3.000 s.
+- Project proxy after the final packaged remove/recreate probe:
+  `media/proxies/89e91938-3ce0-49b8-b955-775a1871ad40.mp4`
+- Proxy SHA-256:
+  `88c645547be8b47f05383301cbbec3465f227c18b5b2501082e2bacb2fdc12b6`
+- Proxy: H.264 1280x720 plus AAC.
+- `media.json` stores only the project-relative path, the exact original-source
+  digest, and 1280x720 dimensions.
+
+Packaged GUI evidence:
+
+- Inspector moved from `生成 720p 代理` to
+  `代理媒体 已就绪 · 1280 × 720` and `移除代理`.
+- Project close/reopen retained the proxy metadata and file.
+- General Settings persisted `优先使用代理媒体播放` across app restart.
+
+The first packaged playback attempt exposed a second real defect: the proxy was
+outside the static asset-protocol scope, so enabling proxy playback produced
+`00:00 / 00:00` while the original poster remained visible. The fix grants only
+the exact regular proxy file at creation/catalog load, rejects symlinks, and
+durably denies removed proxy paths. Focused scope tests pass (2/2).
+
+Final code review exposed a third boundary before publication: a regular proxy
+leaf under a symlinked `media/proxies` ancestor could still escape the project.
+A regression first failed because nested proxy paths were accepted. Creation,
+playback, catalog authorization, relink, and removal now share an exact
+`media/proxies/<leaf>.mp4` resolver that rejects symlink/reparse ancestors and
+confirms both directory parents remain inside the project. Project replacement
+also cancels the single in-flight transcode while holding the identity lease.
+The core nested-path and Tauri symlinked-ancestor regressions both pass.
+Relink and removal now retain the project-identity workflow lease through old
+proxy deletion and scope revocation. The concurrency regression starts a
+project replacement during file cleanup and proves it cannot complete until
+cleanup returns.
+
+Path-switch proof:
+
+- The generated proxy was backed up, then temporarily replaced with a compatible
+  pure-magenta H.264/AAC file (SHA-256
+  `4f6d6b76d31737d30c8adfd021d55154f1a85d35ebf9bd0c459d0f0981010d82`).
+- With proxy preference on, packaged preview played the magenta file and
+  advanced to `00:00:14 / 00:03:00`.
+- Turning proxy preference off immediately restored the original moving color
+  test source and advanced to `00:00:13 / 00:03:00`.
+- The original generated proxy was restored afterward; its SHA-256 again equals
+  `88c645...12b6`.
+
+Original-only export proof:
+
+- Proxy preference stayed on and packaged preview visibly showed the magenta
+  proxy before export.
+- The GUI exported the five-second HDR+proxy-source timeline as 1280x720,
+  120 frames.
+- Output:
+  `/private/tmp/opentake-task15-proxy-export-original-proof-20260801.mp4`
+- Output SHA-256:
+  `6cc5479a3559b64da503290890668d913ebea09c366b2ac04c49e32a6264e5d0`
+- Output has H.264 + AAC, duration 5.000 s, and BT.709 tags.
+- At 2.5 s (inside the proxy-source clip), decoded Y=15..235 with the moving
+  source pattern. A pure-magenta proxy would have a near-constant luma plane.
+  Export therefore used the original source, not the enabled proxy.
+- The generated proxy was restored after this probe and its original SHA-256
+  was re-verified.
+
+Latest-package repeat after the security fix:
+
+- The process path was the rebuilt bundle under test, not the older installed
+  `/Applications` copy.
+- Settings showed proxy playback `on`; packaged playback inside the proxy-backed
+  clip advanced from `00:03:17` to `00:04:16`.
+- Inspector executed `移除代理`, returned to `生成 720p 代理`, then regenerated
+  to `已就绪 · 1280 × 720`.
+- The new UUID leaf probes as H.264 1280×720 plus AAC. Its SHA-256 is again
+  `88c645547be8b47f05383301cbbec3465f227c18b5b2501082e2bacb2fdc12b6`,
+  and `media.json` still binds it to the exact original-source digest.
+
+Final packaged repeat after the identity-lease fix:
+
+- The rebuilt bundle was quit and relaunched before the probe so the test used
+  executable SHA-256 `38c3c1c2...cf95`, not an already-running prior inode.
+- Inspector executed `移除代理`, returned to `生成 720p 代理`, then regenerated
+  to `已就绪 · 1280 × 720`.
+- Packaged playback advanced from `00:00:00` to `00:01:20 / 00:03:00`.
+- The regenerated UUID leaf is the path recorded above, probes as H.264
+  1280×720 plus AAC, has the deterministic proxy SHA-256 above, and remains
+  bound to source digest `633043ad...ca4`.
+
+Proxy child result: **PASS**.
+
+## Account child
+
+Packaged GUI evidence:
+
+- Initial state: no backend address, login disabled, `未登录`.
+- Saving `http://example.com` failed with
+  `Remote account backends must use HTTPS`; login remained disabled.
+- Saving `http://127.0.0.1:9` succeeded as the explicitly allowed local
+  development exception.
+- A non-secret dummy token attempted only
+  `http://127.0.0.1:9/api/auth/verify` and failed closed with a controlled
+  connection error because no service was listening.
+- During that error state, the saved project reopened, the three timeline clips
+  remained present, export stayed enabled, and local playback advanced to
+  `00:00:18 / 00:05:00`.
+- The test backend was cleared afterward; the UI returned to an empty address,
+  disabled login button, and `未登录`. The token field was cleared after the
+  failed attempt.
+
+Focused Rust check: `cargo test -p opentake-tauri account::tests::` — 21 passed.
+The full Web suite also covers AccountPane state and error rendering.
+
+Account child result: **PASS**. Local editing remains the default and is not
+gated by account availability.
+
+## Composite conclusion
+
+`HDR child PASS + proxy child PASS + account child PASS` closes one composite
+acceptance for `MR-hdr-proxy-account-composite`, subject to the repository-wide
+gates and the project-level external release blockers recorded in the handoff.
+The functional Rust/Web gates pass. The completion-audit runner has 205/206
+passing; its sole failure is the protected file inventory omitting previously
+tracked files, so that ledger step remains explicitly open.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/headless-chromium-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/headless-chromium-real-device-2026-08-01.md
new file mode 100644
index 00000000..fe4bc6ab
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/headless-chromium-real-device-2026-08-01.md
@@ -0,0 +1,79 @@
+# Headless Chromium real-device verification — 2026-08-01
+
+Scope: Task 24 / `MR-native-chromium`. This receipt closes the optional native
+HTML/CSS/JS renderer only. It does not claim that the desktop app has wired a
+motion-graphic timeline tool, and it is not Beta-release approval.
+
+## Runtime
+
+- Host: macOS, Apple Silicon, Asia/Shanghai
+- Browser: Google Chrome `150.0.7871.187`
+- Executable: `/Applications/Google Chrome.app/Contents/MacOS/Google Chrome`
+- Backend: direct Chrome DevTools Protocol over a local WebSocket
+- Cargo feature: `opentake-motion/chromium`
+
+## RED
+
+The reviewed-planned integration owner was added first and run with the live
+feature. Compilation failed because the baseline had no
+`MotionCancellationToken`, browser discovery/path override, cancellation API,
+`MotionError::Cancelled`, or live renderer. The baseline feature branch still
+returned `RendererUnavailable` unconditionally.
+
+## Live acceptance
+
+Command:
+
+```text
+cargo test -p opentake-motion --features chromium --test chromium virtual_time_network_csp_timeout_cleanup_and_frame_identity -- --exact --nocapture
+```
+
+Result: PASS, one exact test executed. It verified all of the following through
+a real Chrome process:
+
+- The same three-frame animation rendered into separate cache roots twice with
+  byte-identical PNGs.
+- Frame 0 and frame 2 differed visibly, proving `OpenTake.seek(i/fps)` advanced
+  virtual time rather than returning a static screenshot.
+- A real browser PNG decoded through the injected `MotionClipSource` decoder as
+  a `48x32` RGBA frame.
+- A loopback HTTP origin explicitly added to `SandboxPolicy` was requested and
+  served; the render completed.
+- A non-allowlisted HTTPS resource and a `file:///etc/passwd` resource both
+  failed closed as `MotionError::Sandbox`.
+- A runaway `while(true)` author script hit the 500 ms budget and returned
+  `MotionError::Timeout`.
+- A deliberately crashing browser executable returned `RenderFailed`; empty
+  source returned `InvalidSource`.
+- An in-flight runaway render was cancelled from another thread and returned
+  `MotionError::Cancelled`.
+- Policy failure removed partial `frame_*.png` output. Across success, sandbox
+  failure, timeout, crash, malformed input, and cancellation, no process-scoped
+  `opentake-chromium-*` profile directory remained.
+
+The allowlist pure tests additionally prove that an origin prefix lookalike such
+as `https://cdn.jsdelivr.net.evil.example` and a loopback lookalike such as
+`http://localhost.evil.example` are rejected.
+
+## Gates
+
+- Default focused owner: PASS; one exact fail-closed test executed.
+- Default planned integration owner: PASS; one exact test executed and asserted
+  `RendererUnavailable` without launching a browser.
+- Feature-enabled motion package: PASS — 55 unit + 1 Chromium integration + 3
+  pipeline tests.
+- `cargo clippy -p opentake-motion --all-targets -- -D warnings`: PASS.
+- `cargo clippy -p opentake-motion --all-targets --features chromium -- -D warnings`:
+  PASS.
+- `cargo fmt --all -- --check`: PASS.
+- `cargo test --workspace --no-fail-fast`: PASS. The first attempt stopped at
+  archive creation with `No space left on device`; only generated
+  `target/debug/deps` and `target/debug/incremental` were deleted, preserving
+  `target/release`, and the identical command then passed.
+
+## Remaining boundary
+
+`HeadlessChromiumRenderer` remains feature-gated and `MotionClipSource` remains
+an unconnected library adapter. Desktop/core/agent motion materialization,
+timeline placement, packaged browser provisioning on Windows, and the planned
+Motion Canvas plugin are separate owned tasks and remain open.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-autosave-metadata-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-autosave-metadata-real-device-2026-07-31.md
new file mode 100644
index 00000000..3edb2323
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-autosave-metadata-real-device-2026-07-31.md
@@ -0,0 +1,47 @@
+# Home autosave and metadata real-device verification (2026-07-31)
+
+## Scope
+
+- Contract: `HS-autosave-metadata-mixed`
+- Owning requirement: `requirement-034f4a07aa8a3c47`
+- Exact final application: `target/debug/bundle/macos/OpenTake.app`
+- Exact final DMG: `target/debug/bundle/dmg/OpenTake_1.0.0_aarch64.dmg`
+
+## RED and GREEN evidence
+
+- The planned test `autosave_and_home_metadata_have_separate_owners` first failed because a successful save left `modifiedAt` at `750`, left `thumbnailPath` null, and therefore exposed no persisted Home metadata update.
+- The native metadata test first failed to compile because `HomeProjectEntry` had no `modified_at` or `thumbnail_path` fields.
+- The Home interaction test first failed because the project card rendered no image and no relative-time label.
+- Planned exact test: PASS (`1 passed`).
+- Native metadata exact test: PASS (`1 passed`).
+- Focused project/recent/Home regression set: PASS (`4` files, `27` tests).
+- Web full suite: PASS (`77` files, `755` tests).
+- Web production build: PASS with only the existing Vite mixed-import and bundle-size advisories.
+- Rust Clippy: PASS with `-D warnings`.
+- `cargo fmt --all -- --check && cargo test --offline --workspace --no-fail-fast`: PASS; the Tauri library ran `376` unit tests and hardware-only probes retained their explicit owning-runner ignores.
+- `git diff --check`: PASS.
+
+## Artifact identity
+
+- Final app executable SHA-256: `adf7b04897ef0704b9cc43c4ef565b5ccdc06ce31cfafb67528c97374eecb219`.
+- Final DMG SHA-256: `f2098fd08970230569f085302f862e51f5642156ce01fd7b1aa2d38562af4420`.
+- Both bundles were rebuilt after the final visual contract changed from path-plus-time to relative-time-only metadata.
+
+## Packaged edit → save → close → reopen walkthrough
+
+All mutations used `/tmp/OpenTake-Autosave-QA-20260731-1231.opentake`, a temporary copy of the built-in tutorial. A valid 320×180 JPEG cover was copied into that QA bundle. No pre-existing user project was modified.
+
+1. Opened the QA bundle through the native directory picker. Its baseline `project.json` SHA-256 was `e4352964a8bcd331f5f25db19a26c63121890d92f68d8a2cee512f7ad677e421` and the timeline contained three clips.
+2. Activated `添加文本`. After the 1.5-second debounce, the persisted project hash changed to `8ddaaecd6d2ffc3f117db9e3d3b67492bdd25ce69065285da5c5cdf4a847ca01`, proving silent autosave completed.
+3. Activated `添加文本` again and immediately requested window close, before the debounce could fire. The native CloseRequested flush changed the persisted hash to `5571da3a4878af4d19a6ab37fc3947cdb9d40ea9026bc5a2dbef068c21d0a2d7`; the saved project contained three tracks and five total clips.
+4. After the close-to-Home event settled, reopened the resident app. Home contained four recent projects and the QA card showed its 16:9 cover plus `今天`; the absolute path was no longer used as the visible subtitle.
+5. Double-opened the QA card. The editor exposed both newly persisted clip IDs plus the original three tutorial clips, proving the autosave and close-flush writes both survived reopen.
+6. Returned Home, removed only the QA recent entry (`4 recent` → `3 recent`), then moved the temporary QA bundle to `~/.Trash/OpenTake-Autosave-QA-20260731-1231.opentake` for recoverable cleanup.
+7. Rebuilt the final app and DMG after the relative-time-only visual correction. Launched the exact final `.app` as the sole OpenTake instance and confirmed all three retained user cards display covers/placeholders and localized relative time without visible filesystem paths.
+
+## Ownership and recovery assertions
+
+- `openedAt` owns recent ordering and changes only when a project opens; a successful save updates `modifiedAt` and `thumbnailPath` without moving the card.
+- The native registry refreshes metadata from the persisted `project.json` mtime and optional bundle-root `thumbnail.jpg`; missing bundles retain their last metadata and do not attempt cover loading.
+- Save failure does not update Home metadata, while the existing save coordinator keeps the project dirty and exposes its error toast.
+- The temporary QA bundle remains recoverable in system Trash. The three original recent projects remained registered at the end.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-component-mapping-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-component-mapping-real-device-2026-07-31.md
new file mode 100644
index 00000000..4effce19
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-component-mapping-real-device-2026-07-31.md
@@ -0,0 +1,82 @@
+# Home component mapping real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `home-shell-implementation.md`, Task 8 `HS-component-mapping-composite`.
+- Requirement: `requirement-047e16af5d02f827`.
+- Product boundary: packaged macOS Tauri application, not a browser-only mock.
+- Verification project: `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`.
+
+## Code and package gates
+
+- `pnpm --dir web test`: PASS, 82 files / 773 tests.
+- `pnpm -C web exec vitest run src/components/shell/ShellComponentMapping.test.tsx -t every_documented_shell_component_has_exact_owner`: PASS, 1/1 exact owner-index test.
+- `pnpm --dir web build`: PASS. Only the pre-existing Vite large-chunk and ineffective-dynamic-import warnings remain.
+- `cargo test --workspace --no-fail-fast --quiet`: PASS across the workspace; the platform/real-device probes marked ignored by their owning suites remained ignored.
+- `cargo fmt --all -- --check`: PASS.
+- `git diff --check`: PASS.
+- `web/node_modules/.bin/tauri build --debug --bundles app,dmg`: PASS.
+
+Verified package artifacts:
+
+| Artifact | Size | SHA-256 |
+|---|---:|---|
+| `target/debug/bundle/macos/OpenTake.app/Contents/MacOS/opentake` | 148338232 bytes | `329a937ee161abf913252ebed2e1dcde4e24dcce84fb06111091dd949156c68f` |
+| `target/debug/bundle/dmg/OpenTake_1.0.0_aarch64.dmg` | 42588353 bytes | `a63074ee6a879767feb381d8b1add548ab989efa4e7efd74cef6cad2a722e7b1` |
+
+These are Task 8 verification artifacts, not the project-wide Beta release. Beta remains blocked until every implementation-plan record and the release gates are closed.
+
+## Packaged application walkthrough
+
+### Logical linked A/V selection and Inspector ownership
+
+1. Opened `TalkingHeadQA` from Home in the rebuilt application.
+2. Selected the V1 picture clip whose linked audio companion is selected by the timeline.
+3. Inspector exposed `视频`, `音频`, and `AI 编辑` rather than treating the linked pair as an unrelated multi-selection.
+4. A genuine multi-selection continues to use the multi-selection Inspector state in the owning tests.
+
+This walkthrough exposed and closed the original linked-selection defect by routing Inspector, crop, and transition selection through `findLogicalSingleClip`.
+
+### AI Edit
+
+1. Generated the deterministic balanced-polish proposal.
+2. Rejected the first proposal and observed that no undo entry was created.
+3. Generated again, accepted, and applied the proposal. The UI reported `建议已通过可撤销编辑命令应用。`; global undo became enabled.
+4. Activated `撤销本次应用`; the proposal returned to idle, undo disabled, and redo enabled.
+5. Owning tests also cover generation failure and cancellation without command submission.
+
+### Music
+
+1. Opened `音乐` and verified independent project-music and saved-library empty states.
+2. Activated `AI 生成音乐`; Agent opened and received the exact draft requiring style, mood, duration, instrumental choice, model, and cost confirmation before paid generation.
+3. Imported `/tmp/opentake-task8-music.wav` through the native macOS file panel. Input SHA-256: `c087187ef80798631ceac4eee8d43c8d4d441451576abdf45a8d7b7bd2269129`.
+4. The imported item appeared in project music, `放到时间线` succeeded, timeline duration advanced to `00:30:20`, Audio Inspector opened, and undo became available.
+5. After application restart, the project music entry and placed audio remained present.
+
+### Cross-dissolve transition
+
+1. Opened `转场`, selected linked V1 clip `id-4`, and resolved the exact adjacent cut `id-4 → c7e1e6d4-6be2-4844-a827-c4fa9e20d402`.
+2. Applied a 15-frame / 0.50-second cross dissolve. The selection and transition panel stayed visible and the UI reported success.
+3. Returned Home, reopened the project, and observed the same transition selected with `aria-pressed=true`, a 15-frame duration, and a visible Remove action.
+4. Project persistence contained `transitionOut.kind = crossDissolve`, `durationFrames = 15`, and the exact `toClipId` on `id-4`.
+5. Removed the transition, observed `转场已移除。`, then used global undo. The transition returned, redo became available, and the stale removal message was no longer rendered.
+
+The walkthrough found and closed two packaged-app-only interaction defects: linked A/V selection hid the single-clip controls, and the generic media panel mouse-down handler cleared the cut selection while applying a transition. A final pass also bound transient feedback to the current project state so global undo cannot leave contradictory text.
+
+## Real export result
+
+With the saved cross dissolve active, the packaged application exported `/tmp/opentake-task8-transition-export.mp4` through the native save panel.
+
+`ffprobe` result:
+
+- video: H.264, 1280×720, `yuv420p`, 30/1 fps;
+- audio: AAC;
+- duration: 30.666667 seconds;
+- size: 226647 bytes;
+- SHA-256: `133a275ac193bf2e9e5b18f49e701a84cbdde6e278fec7d5d05b186e680f126b`.
+
+The render-plan owning tests additionally verify the outgoing/incoming weighted layer sequence inside the dissolve window and that preview/export consume the same plan.
+
+## Outcome
+
+Task 8 is complete and verified at its owning code, persistence, packaged-interaction, and export boundaries. This evidence closes only the Task 8 component-mapping slice; it does not reclassify the broader Inspector plan or authorize the first Beta release.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-new-project-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-new-project-real-device-2026-07-31.md
new file mode 100644
index 00000000..4e3dfa15
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-new-project-real-device-2026-07-31.md
@@ -0,0 +1,26 @@
+# Home new-project acceptance — 2026-07-31
+
+Scope: Home Shell Task 9 (`implementation-slice-60d775675af9091c`) on the exact arm64 debug bundle at `target/debug/bundle/macos/OpenTake.app`.
+
+## Code verification
+
+- RED: the three exact candidate tests failed because activating New Project exposed no shared `home.creating` state and did not disable the other Home lifecycle controls while creation was pending.
+- The previous native flow called `project_new` before the initial `project_save(path)`. A failed first save could therefore discard the live project before reporting the failure.
+- GREEN: all sidebar, empty-launcher, and populated-launcher New Project controls now share the Home lifecycle single-flight state with Open Project and recent cards. During creation, both New controls announce `正在创建…`; every New/Open/recent entry is natively disabled with `aria-busy`; settlement restores all controls.
+- `project_new(path)` now creates and saves a separate fresh `AppCore` on a blocking worker, reopens the resulting bundle, and commits the prepared project only after the entire operation succeeds. A 15-second lifecycle timeout and the shared coordinator prevent main-thread stalls and overlapping New/Open publication. The no-path browser fallback remains supported.
+- Failure tests prove that an invalid destination leaves the live Rust core, front-end project snapshot, media state, and Home view unchanged while exposing the localized structured error toast. Successful creation returns the committed bundle path directly and no longer performs a second `project_save` call.
+- Focused results: 31/31 Home/project-action tests passed and 5/5 Rust async lifecycle tests passed. Each of the three plan-prescribed candidate commands executed successfully.
+- Regression results: 72 Web files / 742 tests passed; production Web build passed; default and `--no-default-features` Tauri checks passed; both Clippy gates passed with `-D warnings`; `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast` passed. Remaining output is limited to the repository's pre-existing `block v0.1.6` future-incompatibility warning, the known Vite chunk/dynamic-import warnings, and explicitly ignored hardware probe tests.
+
+## Real-device verification
+
+1. Started from populated Home and activated the sidebar `新建项目`. The native macOS save sheet opened. Cancelling it returned to Home with all controls enabled and no project/recent mutation.
+2. Repeated the sidebar action, chose `/private/tmp/Task9Sidebar-20260731.opentake`, and saved. The app entered a fresh editor with an empty media library and `00:00:00` timeline. The bundle contains valid `project.json` and `media.json`; the timeline is 1920×1080 at 30 fps with zero tracks.
+3. Returned to populated Home and activated the hero `新建项目`, saving `/private/tmp/Task9Populated-20260731.opentake`. The same fresh-editor and on-disk bundle checks passed.
+4. Removed recent entries only (the bundles remained untouched) to expose the empty launcher, then activated its `新建项目` and saved `/private/tmp/Task9Empty-20260731.opentake`. The app entered the fresh editor and produced the same valid bundle structure.
+5. Returned Home and double-clicked the `Task9Empty-20260731` recent card. The just-created bundle reopened successfully in the same packaged process, proving the first save produced a reusable project rather than a UI-only session.
+6. Selected `/private/tmp` itself through the native Open Project picker as an invalid bundle. Home exposed `打开失败：missing required project.json in bundle at /private/tmp`, remained responsive, and recovered all lifecycle controls. This confirms the shared failure/retry path after the Task 9 state refactor.
+7. Terminated duplicate stale debug/installed processes that shared the bundle identifier, relaunched exactly one current debug bundle, and repeated the final checks to exclude automation routing ambiguity.
+8. Reopened the preserved `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`; the editor showed `talking-head-30s` and duration `00:29:20`. Returning Home restored `TalkingHeadQA` alongside `Task9Empty-20260731` in recents. No pre-existing project bundle was modified or deleted.
+
+Result: PASS. All three planned New Project controls have native cancel/retry, success, persisted-bundle, reopen, busy exclusion, and explicit failure/recovery evidence, while initial-save failure can no longer replace the active project.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-open-project-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-open-project-real-device-2026-07-30.md
new file mode 100644
index 00000000..caa96e12
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-open-project-real-device-2026-07-30.md
@@ -0,0 +1,24 @@
+# Home open-project acceptance — 2026-07-30
+
+Scope: Home Shell Task 10 (`implementation-slice-526c91ba76edbda6`) on the exact arm64 debug bundle at `target/debug/bundle/macos/OpenTake.app`.
+
+## Code verification
+
+- RED: the three exact candidate tests reached the `home.opening` state but failed because their controls remained enabled while `openProjectViaDialog` was pending.
+- GREEN: the sidebar, empty-launcher, and populated-launcher controls now share one Home-level pending state and expose native `disabled`/`aria-busy` state until the open attempt settles. All Open, New, and recent-project entries are disabled together, a second activation cannot start another dialog, and a rejection test proves recovery to the enabled label.
+- Project-open failures preserve the current front-end state, surface the structured Tauri error message through the localized Home toast, and remain rejected to non-UI callers.
+- `AppCore::prepare_project_open` runs in `spawn_blocking` behind a 15-second timeout; the prepared value is committed only after successful completion. A late timed-out worker has no reference to the live core and cannot replace the current project. A managed single-flight lifecycle coordinator also rejects overlapping Open/New transitions before either can supersede the other.
+- Focused results: 26/26 Home/project-action tests passed; 6/6 Rust project-open/lifecycle tests passed, including single-flight exclusion, off-thread execution, timeout/no-late-commit, failure preservation, successful activation, and mapped-media acceptance.
+- Regression results: 72 Web files / 737 tests passed; production Web build passed; default and `--no-default-features` Tauri checks passed; both CI-equivalent Clippy gates passed with `-D warnings`; `cargo fmt --all -- --check && cargo test --workspace --no-fail-fast` passed, with only the repository's pre-existing future-incompatibility warning for `block v0.1.6` and the explicitly ignored real-device probe tests.
+
+## Real-device verification
+
+1. Activated the Home sidebar Open Project control with a native double-click. Exactly one macOS directory sheet appeared.
+2. In populated Home, activated the hero Open Project control with a native double-click. Exactly one directory sheet appeared.
+3. Removed the recent entry only, entered the empty-launcher state, and activated its Open Project control with a native double-click. Exactly one directory sheet appeared.
+4. Selected `/Users/lvbaiqing/Documents/OpenTake/未命名.opentake/Untitled.opentake`, whose visible components carry iCloud `Not downloaded` state and whose root `open(2)` previously froze the application. The sidebar control became disabled and announced `正在打开…`; the exact debug process remained responsive while the filesystem call stayed isolated off the main thread.
+5. At the 15-second boundary the control returned to `打开项目` and the UI exposed `打开失败：project open timed out after 15s`. No editor transition or recent entry was published for the failed bundle.
+6. In the same process, opened the preserved local bundle `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`. The editor showed media `talking-head-30s` and duration `00:29:20`, proving the timeout did not corrupt or supersede the valid session.
+7. Restored `TalkingHeadQA` to Home recents after the empty-state check. The FileProvider-backed `Untitled.opentake` bundle was not modified or deleted.
+
+Result: PASS. All three planned controls have pending, cancel/retry, success, and explicit failure/recovery evidence; a non-responsive cloud-backed directory no longer freezes the application or mutates the active project.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-project-lifecycle-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-project-lifecycle-real-device-2026-07-31.md
new file mode 100644
index 00000000..cff96308
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-project-lifecycle-real-device-2026-07-31.md
@@ -0,0 +1,55 @@
+# Home project lifecycle real-device verification (2026-07-31)
+
+## Scope
+
+- Contract: `HS-project-card-lifecycle`
+- Owning requirement: `requirement-c4af18634c223a8d`
+- Exact packaged artifact: `target/debug/bundle/macos/OpenTake.app`
+- DMG artifact: `target/debug/bundle/dmg/OpenTake_1.0.0_aarch64.dmg`
+
+## RED evidence
+
+- `cargo test -p opentake-tauri missing_entry_survives_registry_load_and_safe_trash_removes_only_after_success` failed to compile because `ProjectRegistry` did not exist.
+- `pnpm -C web exec vitest run src/components/home/HomeView.test.tsx -t 'missing_card_reveal_remove_and_trash_states'` failed because Home rendered only the stale path and did not render `home.fileMissing` or any safe file actions.
+
+## GREEN evidence
+
+- Exact Rust owning test: PASS (`1 passed`).
+- Exact Home owning test: PASS (`1 passed`).
+- Home component regression pair: PASS (`2` files, `16` tests).
+- `cargo fmt --all -- --check`: PASS.
+- `cargo clippy --offline -p opentake-tauri --all-targets -- -D warnings`: PASS.
+- `cargo test --offline --workspace --no-fail-fast`: PASS; hardware-only probes remain explicitly ignored by their owning runners.
+- `pnpm -C web test -- --run`: PASS (`76` files, `753` tests).
+- `pnpm -C web build`: PASS with the existing Vite mixed-import and bundle-size advisories.
+- `git diff --check`: PASS.
+
+## Final artifact identity
+
+- App executable SHA-256: `5e345b5a143fee720eca5049bf673c09a57ab08428666f1da0b660f3a1b6f5d1`.
+- DMG SHA-256: `a775931f5f622ddbb3507b31ca7d000c2ad373b7af21bf7766e007bae3f92b71`.
+- Both bundles were produced successfully after the final native trash implementation.
+
+## Packaged macOS walkthrough
+
+All destructive checks used temporary copies of the built-in tutorial. The three pre-existing user recent projects were never targeted and remained present at the end.
+
+1. Opened `/tmp/OpenTake-HomeLifecycle-QA-20260731-1157.opentake` through the native Open panel. Home changed from `3 recent` to `4 recent`, proving native registration and legacy/local mirror synchronization.
+2. Expanded `项目操作`; the accessible dialog exposed `在 Finder 中显示`, `从最近项目中移除`, and `移到废纸篓`.
+3. `在 Finder 中显示` opened Finder at `/private/tmp` with the exact QA bundle selected.
+4. The first packaged trash attempt exposed a real platform failure: Finder Apple Events waited indefinitely without Automation authorization. The UI stayed in pending state; after terminating only the stuck QA helper process, it returned an explicit retryable error. The bundle remained at its source path and the Home record remained at `4 recent`.
+5. The implementation was changed to Foundation's native `NSFileManager.trashItem`, rebuilt, and relaunched from the exact `.app` path.
+6. Activating `移到废纸篓` showed a named confirmation dialog. Confirming immediately returned Home to `3 recent`; the source path was absent and the complete bundle existed at `~/.Trash/OpenTake-HomeLifecycle-QA-20260731-1157.opentake`.
+7. Opened a second QA bundle, relocated it to a recovery path while the editor was active, then returned Home. The registry preserved the card and exposed the accessible label `OpenTake-Missing-QA-20260731-1201 · 文件缺失`.
+8. Double activation of the missing card stayed on Home. Reveal opened its existing `/private/tmp` parent rather than raising a silent error.
+9. `从最近项目中移除` changed `4 recent` back to `3 recent` without touching the recovery bundle.
+10. After making ordinary recent removal native-first, rebuilt both bundles and launched the exact final `.app` as the only running OpenTake instance. Opened `/tmp/OpenTake-AtomicRemove-QA-20260731-1215.opentake`, observed `3 recent` → `4 recent`, then used `从最近项目中移除` and observed `4 recent` → `3 recent`. The native registry no longer contained that path while the complete bundle remained at its source, proving removal committed before the UI mirror changed and did not delete the project. The QA copy was then moved to `~/.Trash/OpenTake-AtomicRemove-QA-20260731-1215.opentake` for recoverable cleanup.
+
+## Safety and recovery assertions
+
+- The native trash command rejects relative paths, non-`.opentake` paths, and paths not present in the native registry before invoking any operating-system capability.
+- The injected permission-denied Rust path leaves both the project directory and registry entry unchanged.
+- A missing registered bundle is treated as a removable stale record; no filesystem delete is attempted.
+- Registry snapshots are staged, synced, and atomically renamed; mutation becomes visible in memory only after persistence succeeds.
+- On desktop, ordinary recent removal awaits the native atomic registry commit before updating the local Home mirror; a persistence failure remains visible and retryable instead of hiding the card.
+- All three temporary QA bundles were placed in the user's system Trash after verification and remain recoverable. Existing user project data was not modified.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-sample-project-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-sample-project-real-device-2026-07-31.md
new file mode 100644
index 00000000..462e8618
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-sample-project-real-device-2026-07-31.md
@@ -0,0 +1,52 @@
+# Home sample project real-device verification (2026-07-31)
+
+## Scope
+
+- Contract: `HS-new-open-sample`
+- Owning requirement: `requirement-31a4c6a115076c19`
+- Packaged artifact: `target/debug/bundle/macos/OpenTake.app`
+- DMG artifact: `target/debug/bundle/dmg/OpenTake_1.0.0_aarch64.dmg`
+
+## RED evidence
+
+- `cargo test -p opentake-tauri failed_materialization_rolls_back_entire_sample_directory` initially failed to compile because `SampleProjectService`, `ResolvedSample`, and `SampleDownload` did not exist.
+- The existing Web suite remained green, while the newly declared Home interaction test failed because the tutorial sample button and its action route did not exist.
+
+## GREEN evidence
+
+- `cargo fmt --all -- --check`: PASS.
+- `cargo test -p opentake-tauri failed_materialization_rolls_back_entire_sample_directory`: PASS (`1 passed`).
+- All sample service tests: PASS (`3 passed`), including valid publish/progress and the offline tutorial contents.
+- `cargo clippy -p opentake-tauri --all-targets -- -D warnings`: PASS.
+- `cargo test --workspace --no-fail-fast`: PASS across the workspace; hardware-only GPU/audio probes remain explicitly ignored by their owning runners.
+- `pnpm -C web test -- --run`: PASS (`76` files, `752` tests).
+- `pnpm -C web build`: PASS. Vite retained its pre-existing mixed dynamic-import and bundle-size advisories.
+- `git diff --check`: PASS.
+
+## Artifact identity
+
+- App executable SHA-256: `299d1c3efd845ce7c61ff84825a22ca3acb40c85b2936584723ae4bd97999179`.
+- DMG SHA-256: `0f622f0b91a1e3f20929c35a1082aa6183797d8669931033fb725956206d11ab`.
+- Tauri produced both bundles successfully from the tested source tree.
+
+## Packaged macOS walkthrough
+
+The exact `.app` path above was targeted through the macOS accessibility surface. An older running process was first quit, then the just-built artifact was launched so the verification could not reuse stale code.
+
+1. Home rendered an accessible `示例项目` region with `产品演示`, `快速教程`, and `模板项目` buttons.
+2. Before opening a sample, Home showed exactly three existing recent projects: `TalkingHeadQA`, `Task7NativeSaveAs-20260731`, and `Task9Empty-20260731`.
+3. Activating `快速教程` entered the editor and displayed `教程项目已打开。按照时间线中的示例开始编辑。`.
+4. The editor reported a `00:12:00` timeline at `30 fps`, with one `T1` track and three sequential clips: `sample-text-0`, `sample-text-1`, and `sample-text-2`.
+5. Direct inspection of the materialized cache bundle confirmed one track, three 120-frame text clips at frames `0`, `120`, and `240`, for `360` frames total.
+6. Returning Home still showed the same three recent projects. The cache bundle was not registered as user work.
+7. Activating `快速教程` a second time succeeded with the same three clips and tutorial toast, exercising replacement of the existing stable cache entry.
+
+## Failure and recovery coverage
+
+- The exact Rust ownership test injects a failure after the first file write and verifies that the stable sample directory does not exist and that the entire staging directory is removed.
+- The action-layer Web test rejects materialization and verifies that `projectOpen` is not called, the editor remains on Home, existing recents are unchanged, and a localized error toast is displayed.
+- The packaged walkthrough did not intentionally corrupt or intercept external network traffic; deterministic service and action tests own that destructive failure path.
+
+## Environment maintenance
+
+The first focused rerun after packaging exhausted the local disk while Rust attempted to write a test archive. Only the repository's regenerable `target/debug/incremental` cache was removed (about 10 GiB); the verified `.app`, DMG, source files, and user project data were preserved. The focused checks then passed.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-secondary-controls-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-secondary-controls-real-device-2026-07-30.md
new file mode 100644
index 00000000..0e8b3415
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-secondary-controls-real-device-2026-07-30.md
@@ -0,0 +1,20 @@
+# Home secondary controls acceptance — 2026-07-30
+
+Scope: Home Shell Task 11 (`implementation-slice-94554777e3aef548`) on the single current arm64 debug bundle at `target/debug/bundle/macos/OpenTake.app`.
+
+## Code verification
+
+- Baseline: the Home interaction runner existed from Task 12, but the four exact Task 11 names were absent; the focused filter executed zero candidates and skipped the file.
+- Added exact tests for Home → Library, Home → Settings, background selection clearing, and recent-entry removal without project opening.
+- Focused result: 5/5 Home interaction tests passed, including the four Task 11 candidates.
+- Regression result: 72 Web files / 731 tests passed; production Web build passed with only the pre-existing dynamic-import and chunk-size warnings.
+
+## Real-device verification
+
+1. From Home, activated `素材库`; the app showed the global Library with `返回主页`, category controls, search, and empty-library state.
+2. Returned Home and activated `设置`; the modal exposed `完成`, `通用`, `外观`, `导入`, `AI`, `MCP 说明`, `账户`, and `关于`, then closed back to Home.
+3. Single-clicked `TalkingHeadQA`; accessibility changed it to `Value: on`. Clicked the empty Home workspace; it returned to `Value: off` without navigation.
+4. Hovered `TalkingHeadQA` and activated `从最近中移除`. The Home count changed from 2 to 1, `TalkingHeadQA` disappeared, no editor opened, and `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake` still existed on disk.
+5. Used Home → Open Project, navigated the native directory picker to the exact preserved bundle, and opened it. The editor showed `talking-head-30s` and `00:29:20`; returning Home showed 2 recent entries again.
+
+Result: PASS. Navigation, selection clearing, and recent-only removal behave correctly, and the recoverable recent entry was restored after validation.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/home-upstream-composite-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/home-upstream-composite-real-device-2026-07-31.md
new file mode 100644
index 00000000..8a13f3d1
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/home-upstream-composite-real-device-2026-07-31.md
@@ -0,0 +1,69 @@
+# Home upstream composite real-device evidence — 2026-07-31
+
+## Scope
+
+- Plan: `home-shell-implementation.md`, Task 1 `HS-upstream-home-composite`.
+- Requirement: `requirement-0ccbf12f850bf335`.
+- Boundary: complete Home shell aggregation after all fifteen child slices were already closed.
+
+## Exact code evidence
+
+The initial command
+
+`pnpm -C web exec vitest run src/components/home/HomeView.test.tsx -t upstream_home_children_close_one_composite_acceptance`
+
+found no matching test and reported one skipped file / three skipped tests. This was retained as the genuine missing-owning-evidence baseline rather than manufacturing a production failure.
+
+After implementation:
+
+- exact composite test: PASS, 1/1 (three unrelated tests skipped by the name filter);
+- complete Web suite: PASS, 82 files / 774 tests;
+- production Web build: PASS, with only the pre-existing large-chunk and ineffective-dynamic-import warnings;
+- complete Rust workspace: PASS on the immediately preceding combined branch gate; Task 1 changed no Rust source;
+- `git diff --check`: PASS;
+- debug macOS `.app` and `.dmg` bundle build: PASS.
+
+Current verification artifacts:
+
+| Artifact | Size | SHA-256 |
+|---|---:|---|
+| `target/debug/bundle/macos/OpenTake.app/Contents/MacOS/opentake` | 148338232 bytes | `e7374361c03307bfa1b257f3d4977ce5ec3e8fa298913e37af28194c4df963e1` |
+| `target/debug/bundle/dmg/OpenTake_1.0.0_aarch64.dmg` | 42588806 bytes | `009b679ca08fd3b4840823b8a22f039061e046627a1c504dbb459d6137123a45` |
+
+These remain verification bundles. They are not the first Beta release because other implementation-plan groups are still open.
+
+## Composite contract coverage
+
+The exact owning test exercises the Home boundary rather than checking disconnected source strings:
+
+1. With no recents and no last-seen version, Home renders sidebar, sample strip, empty welcome state, and a modal first-run welcome surface.
+2. The welcome action receives initial focus; Escape dismisses it and records the exact build-time `__APP_VERSION__`.
+3. A simulated prior version renders the `New in v{version}` surface and release body, then persists dismissal.
+4. Existing and missing project cards render together; the missing card exposes the context menu, reveal/remove/safe-trash actions, confirmation copy, and a non-destructive cancel path.
+5. Native keyboard activation of the existing project routes the exact path through `openProjectPath`.
+6. The product-demo sample routes the exact `product-demo, false` arguments through `openSampleProject`.
+
+## Packaged application result
+
+The rebuilt macOS application opened directly to a modal `v1.0.0 新功能` surface containing the AI Edit, music, and cross-dissolve release summary. Accessibility exposed one dialog heading and one `了解` button, with the background Home controls unavailable while the modal was active.
+
+After activating `了解`, the application exposed:
+
+- sidebar: New Project, Open Project, Library, Settings;
+- samples: Product Demo, Quick Tutorial, Template Project;
+- welcome hero and tagline;
+- three recent project cards with separate project-action controls.
+
+The app was quit and relaunched. The update surface did not reappear, proving the last-seen version persisted across a real process boundary and returned to the Home shell.
+
+## Child runtime evidence aggregated by this umbrella
+
+- Native new/open/sample and tutorial routing: [`home-sample-project-real-device-2026-07-31.md`](home-sample-project-real-device-2026-07-31.md).
+- Project create/open/close/reopen lifecycle: [`home-project-lifecycle-real-device-2026-07-31.md`](home-project-lifecycle-real-device-2026-07-31.md).
+- Autosave and Home metadata: [`home-autosave-metadata-real-device-2026-07-31.md`](home-autosave-metadata-real-device-2026-07-31.md).
+- Missing/reveal/remove/safe-trash and secondary Home controls: [`home-secondary-controls-real-device-2026-07-30.md`](home-secondary-controls-real-device-2026-07-30.md).
+- Native project-card focus, Return, and double-click: [`recent-project-card-real-device-2026-07-30.md`](recent-project-card-real-device-2026-07-30.md).
+
+## Outcome
+
+Task 1 is complete. Together with Tasks 2–16, all 43 records in the `home-shell` gap group now have owning tests and retained runtime evidence. This closes the Home group only; it does not reclassify other plan groups or authorize Beta publication.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/hsl-secondary-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/hsl-secondary-real-device-2026-07-31.md
new file mode 100644
index 00000000..72dc672e
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/hsl-secondary-real-device-2026-07-31.md
@@ -0,0 +1,129 @@
+# HSL secondary packaged-app verification (2026-07-31)
+
+## Scope
+
+This record closes implementation-plan Task 9 (`MR-hsl-secondary`). It covers a
+persisted feathered hue qualifier, CPU/WGSL agreement, selected-hue isolation,
+Inspector editing and recovery, and the complete packaged preview/export path.
+
+This is local functional evidence only. It is not Developer ID signing,
+notarization, or a Beta release claim.
+
+## RED and GREEN evidence
+
+The owning test was added before implementation and initially failed to compile:
+
+- unresolved import `opentake_domain::HslSecondary`
+- `ColorGrade` had no `hsl_secondary` field
+
+Exact RED/GREEN command:
+
+`cargo test -p opentake-render --test gpu_effects hsl_secondary_hue_boundary_feather_and_isolation -- --exact`
+
+The same command now passes on the real Metal/wgpu device. Its 16 x 16 chart
+contains red, feather-boundary orange, green, and blue bars. It verifies:
+
+- selected red changes by more than 20 code values;
+- boundary orange changes by more than 2 but less than selected red;
+- isolated green and blue remain within 2 code values;
+- fresh preview and export renders are byte-identical;
+- JSON save/reopen preserves every HSL parameter exactly.
+
+Domain tests additionally cover red-range wraparound (`0 == 1`), grey-pixel
+isolation, and stable rejection of a zero-width selector. The command test
+persists the nested grade and restores it through undo and redo.
+
+## Implementation boundary
+
+- `HslSecondary` persists normalized hue center, full range width, feather, hue
+  rotation, relative saturation, and additive lightness.
+- Validation rejects non-finite/out-of-range values before command mutation and
+  before source resolution in the compositor.
+- The CPU reference and WGSL both use circular hue distance and an inward
+  smoothstep feather. Achromatic pixels are never selected.
+- Two named vec4 uniform blocks carry qualifier metadata and adjustments after
+  the primary exposure/white-balance/LGG/contrast/saturation chain.
+- Inspector exposes enable, six editable parameters, and reset. Every edit uses
+  the existing transactional `SetColorGrade` undo/redo path.
+- Browser fallback normalization and validation mirror the Rust ranges.
+
+## Workspace and package gates
+
+- `cargo fmt --all -- --check`: passed.
+- `cargo clippy --workspace --all-targets -- -D warnings`: passed. Cargo only
+  repeated the repository's existing future-incompatibility notice for
+  `block 0.1.6`.
+- `cargo test --workspace --no-fail-fast`: passed; explicit real-device-only
+  probes remained ignored by design.
+- `pnpm -C web test`: 89 files, 809 tests passed.
+- `pnpm -C web build`: passed with the existing non-blocking bundle-size and
+  dynamic-import warnings.
+- `web/node_modules/.bin/tauri build --bundles app --no-sign`: passed.
+
+Tested application:
+`target/release/bundle/macos/OpenTake.app`
+
+- executable SHA-256:
+  `348d9664cc7e4b72fa32e07aa0cdf6ad7e85e8ffca669076afbb10393f94f9df`
+- ad-hoc CDHash: `88ce65b3757e702ae63100c9ace54854fec2e584`
+- `codesign --verify --deep --strict --verbose=2`: passed, including bundled
+  `ffmpeg` and `ffprobe`.
+- `Signature=adhoc`, `TeamIdentifier=not set`; this proves local bundle
+  integrity only.
+
+## Packaged application workflow
+
+Fixture:
+`/private/tmp/opentake-hsl-ui-real-device-20260731.opentake`
+(native Save As copy of the real 30 fps talking-head project).
+
+Through the visible packaged UI:
+
+1. Selected blue video clip `id-4`, enabled HSL Secondary, and authored center
+   `0.667`, width `0.240`, feather `0.080`, hue shift `0.250`, saturation
+   `-0.250`, and lightness `0.100`.
+2. Preview changed immediately from blue to purple, proving the Inspector state
+   reaches the packaged GPU render path.
+3. Five undo operations restored the absent HSL qualifier and blue preview;
+   five redo operations restored all values and the purple preview.
+4. Reset cleared the qualifier. Undo restored all six values, redo cleared it,
+   and a final undo restored the authored state.
+5. Saved, returned Home, reopened from Recents, and confirmed all values and the
+   purple preview persisted. The fresh session correctly disabled undo/redo.
+6. Native playback advanced from frame 0 to `00:01:07` with HSL active.
+7. Exported the complete timeline from the packaged H.264 export dialog.
+
+Precise persisted state:
+
+```json
+{"id":"id-4","colorGrade":{"exposure":0.0,"temperature":0.0,"tint":0.0,"liftGammaGain":{"lift":{"r":0.0,"g":0.0,"b":0.0},"gamma":{"r":1.0,"g":1.0,"b":1.0},"gain":{"r":1.0,"g":1.0,"b":1.0}},"contrast":0.0,"saturation":1.0,"hslSecondary":{"hueCenter":0.667,"hueWidth":0.24,"feather":0.08,"hueShift":0.25,"saturation":-0.25,"lightness":0.1}}}
+```
+
+- `project.json` SHA-256:
+  `5e3e028d18f254cfd2751679979163feec3c59d2a3009b72c534e32654b6c857`
+
+## Complete export
+
+`/private/tmp/opentake-hsl-ui-real-device-20260731.mp4` probes as:
+
+- H.264, 1920 x 1080, 30/1 fps, 920 frames
+- AAC audio, 1439 frames
+- duration `30.666667` seconds
+- size `281291` bytes
+- SHA-256:
+  `42e121dc2d3814b4af7d1f5fc184da85501821a9b3c8ff4dd3e865952c413707`
+
+Bundled FFmpeg sampled the opaque center of frame 0:
+
+- source: RGB `[52, 89, 138]`
+- packaged export: RGB `[169, 100, 158]`
+
+The expected blue-to-purple rotation is therefore present in the complete
+encoded result, while the owning chart test supplies the exact preview/export
+isolation tolerance for hues outside the qualifier.
+
+## Result
+
+Task 9 is verified from bounded persisted model and transactional editing through
+CPU math, real wgpu chart isolation, packaged Inspector recovery, save/reopen,
+native playback, and complete export.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/interchange-export-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/interchange-export-real-device-2026-07-30.md
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--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/interchange-export-real-device-2026-07-30.md
@@ -0,0 +1,74 @@
+# XMEML/FCPXML/OTIO/EDL export automated + real-device evidence — 2026-07-30
+
+Scope: control `control-0d98e5e5a0c417ed` / implementation slice `implementation-slice-a85196307f399399`.
+
+## Production path
+
+- `web/src/components/shell/TitleBar.tsx#onExportInterchange` closes the title-bar menu, opens the native save panel, preserves the project-derived directory and filename, appends the selected extension when it is missing, routes to the selected format command, and reports success/failure through the visible toast.
+- The interchange dialog intentionally omits the native extension filter. On macOS 26.5.2, the `tauri-plugin-dialog` 2.7.1 / `rfd` 0.16 `allowedFileTypes` path disabled the native Save button for these interchange formats. The application still enforces `.xml`, `.fcpxml`, `.otio`, or `.edl` through `withExt()` after confirmation.
+- `web/src/lib/api.ts` invokes the typed Tauri command for XMEML, modern FCPXML, OTIO, or EDL; `src-tauri/src/commands.rs` passes the current timeline and media manifest to the matching `opentake-project` writer.
+- `crates/opentake-project/src/edl.rs#top_video_clips` selects the first track containing actual video/image media. Text/Lottie overlay tracks are excluded so captions cannot shadow the editorial video track in CMX3600 output.
+
+## Defects found by real-device verification
+
+The first real EDL export, `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-interchange.edl`, was 608 bytes with SHA-256 `120550f84260121e85b8bcf4bb3567ad29bc29387e543d28ee20c44ac575836c`. It contained four caption events named `Offline` and no source-video events. This proved that the previous `is_visual()` selection treated the top caption overlay as the single CMX3600 video track.
+
+The rebuilt application also exposed the macOS 26 native-filter regression: with an interchange extension filter present, the Save button remained disabled. Removing only that filter while keeping the project-derived default path restored the button and retained extension safety in application code.
+
+Corrections:
+
+- Filter EDL candidate clips to `ClipType::Video | ClipType::Image` and skip overlay-only visual tracks.
+- Add `caption_overlay_track_does_not_shadow_video_track` as a Rust regression.
+- Add the exact planned title-bar control test for all four formats, success, failure, cancellation, default-directory fallback, extension completion, menu closure, and the macOS-compatible dialog options.
+
+## Automated evidence
+
+Focused checks:
+
+```text
+cargo test -p opentake-project edl::tests --lib
+pnpm -C web test -- --run web/src/components/shell/TitleBar.interaction.test.tsx
+```
+
+The EDL module passed 14/14 tests. The web command exercised the repository suite and passed 70 files / 721 tests, including six exact `control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL` cases.
+
+Regression gates:
+
+```text
+cargo test --workspace --no-fail-fast -q
+cargo clippy --workspace --all-targets -- -D warnings
+pnpm -C web test
+pnpm -C web build
+cargo fmt --all -- --check
+git diff --check
+```
+
+All executed checks passed. The Rust workspace retained only its declared ignored hardware probes. Vite emitted only the existing ineffective-dynamic-import and large-chunk warnings.
+
+## Real macOS application loop
+
+Environment:
+
+- macOS 26.5.2 (25F84), arm64.
+- Application: `/Users/lvbaiqing/TRUE 开发/PRIMARY-CN/OpenTake-generation/target/debug/bundle/macos/OpenTake.app`, rebuilt from the working tree and ad-hoc signed with all bundle resources sealed before launch.
+- Project: `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`, 890 frames at 30 fps, with caption overlay tracks above three video/audio edit fragments.
+
+Using the visible title-bar `导出` menu and native macOS save panel, the rebuilt application exported all four formats and displayed `已导出` after each write:
+
+| Format | Output | Bytes | SHA-256 |
+| --- | --- | ---: | --- |
+| XMEML | `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-final-xmeml.xml` | 11,846 | `392b3f4e6024a66fa595449c63748ce8ad8bc5ff1c6a474a6e8b2b15b1d19c87` |
+| FCPXML | `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-final-fcpxml.fcpxml` | 2,750 | `751c357ecaa1003721d13801f47226456f51fab5b21b7371c74ca8363b933de4` |
+| OTIO | `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-final-otio.otio` | 15,628 | `972582868654e94db85000aa785abab3454e9bdde14d352803db4d22fe0afebc` |
+| EDL | `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-final-edl.edl` | 533 | `a7f9b82d3503dacd4817878ea8eaed69bae7a707cfc963972221ad617198a8c7` |
+
+Validation:
+
+- `xmllint --noout` parsed both XML outputs.
+- `jq` parsed OTIO and found four tracks with child counts `[2,5,3,3]`, matching two overlay tracks plus three video and three audio edits with explicit gaps.
+- The fixed EDL contains exactly three events, all named `talking-head-30s`, with no `Offline` entry. Its record ranges are `00:00:00;00–00:00:05;01`, `00:00:05;01–00:00:11;25`, and `00:00:11;25–00:00:29;20`; source trims are preserved in the source timecode columns.
+- A second fixed EDL export was byte-identical, confirming deterministic output.
+
+## Result
+
+The planned interchange control is verified across the owning UI test, Tauri command boundary, format writers, a discovered-and-fixed EDL overlay regression, the macOS native save panel, visible success feedback, and parsed generated artifacts. This closes only implementation slice `implementation-slice-a85196307f399399`; adjacent plan slices remain independently tracked.
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/lgg-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/lgg-real-device-2026-07-31.md
new file mode 100644
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--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/lgg-real-device-2026-07-31.md
@@ -0,0 +1,148 @@
+# Lift / gamma / gain packaged-app verification (2026-07-31)
+
+## Scope
+
+This record closes implementation-plan Task 8 (`MR-lgg-proof`). It verifies the
+authored lift/gamma/gain formula against the CPU reference and real wgpu output,
+then exercises the same controls through the rebuilt packaged macOS application.
+
+This is local functional evidence only. It is not Developer ID signing,
+notarization, or a Beta release claim.
+
+## RED evidence
+
+The existing CPU model and WGSL shader both used
+`pow(gain * (x + lift), 1 / gamma)`. That made lift a uniform offset across the
+whole range and put gain inside the gamma power, contrary to the documented
+color-wheel contract
+`gain * pow(x + lift * (1 - x), 1 / gamma)`.
+
+- `cargo test -p opentake-domain lift_gamma_gain_gain_scales` failed to compile
+  after the validation contract was added to the owning test because
+  `ColorGrade::validate` did not exist.
+- `cargo test -p opentake-render --test gpu_effects lift_gamma_gain_matches_cpu_reference -- --exact`
+  failed with `expected 0.32364660303542436, got 0.36317811652316606`.
+
+These failures independently proved the missing hostile-input boundary and the
+old CPU/GPU formula drift from the source requirement.
+
+## Implementation and GREEN evidence
+
+- `ColorGrade::apply_linear` and WGSL now share
+  `gain * pow(max(x + lift * (1 - x), 0), 1 / gamma)` per channel.
+- Lift rolls off to zero influence at white, gamma shapes mid-tones, and gain
+  remains the final channel multiplier.
+- `ColorGrade::validate` provides stable typed field/rule errors for every
+  Inspector range and rejects NaN/Inf. Gamma is strictly within `(0, 4]`.
+- `SetColorGrade` validates before transaction mutation. A zero-gamma request
+  leaves the clip, timeline version, and undo stack unchanged.
+- The compositor validates persisted grades before source resolution, so a
+  damaged project cannot degrade into an unchanged frame or submit NaN/Inf GPU
+  uniforms.
+- `lift_gamma_gain_matches_cpu_reference` checks a non-neutral three-channel
+  fixture, preview/export byte equality, CPU/source-formula equality, GPU pixel
+  tolerance, and the pre-resolution invalid-grade refusal.
+
+Focused GREEN commands:
+
+- `cargo test -p opentake-domain lift_gamma_gain_gain_scales`
+- `cargo test -p opentake-domain color_grade_rejects_non_finite_and_zero_gamma`
+- `cargo test -p opentake-ops --test command_apply set_color_grade_rejects_invalid_without_mutation -- --exact`
+- `cargo test -p opentake-render --test gpu_effects lift_gamma_gain_matches_cpu_reference -- --exact`
+
+All passed.
+
+## Workspace and package gates
+
+- `cargo fmt --all -- --check`: passed.
+- `cargo clippy --workspace --all-targets -- -D warnings`: passed. Cargo only
+  repeated the repository's existing future-incompatibility notice for
+  `block 0.1.6`.
+- `cargo test --workspace --no-fail-fast`: passed; explicit real-device-only
+  probes remained ignored by design.
+- `pnpm -C web test`: 89 files, 808 tests passed. The browser fallback rejects
+  the same invalid gamma before mutation, and the Inspector's gamma minimum is
+  `0.01`, so its visible control cannot author a value the Rust boundary rejects.
+- `web/node_modules/.bin/tauri build --bundles app --no-sign`: passed. Its
+  `pnpm -C web build` prerequisite also passed with the existing non-blocking
+  bundle-size/dynamic-import warnings.
+
+Tested application:
+`target/release/bundle/macos/OpenTake.app`
+
+- executable SHA-256:
+  `638e22fd2c56157d08a778e31122ab90ae133c02327ca584cf4a523564baf246`
+- ad-hoc CDHash: `6ba8caf5dcac7835c773158e335e0d8eb5df8666`
+- `codesign --verify --deep --strict --verbose=2`: passed, including bundled
+  `ffmpeg` and `ffprobe`.
+- `Signature=adhoc`, `TeamIdentifier=not set`; this proves local bundle
+  integrity only.
+
+## Packaged application workflow
+
+Fixture:
+`/private/tmp/opentake-lgg-real-device-20260731.opentake`
+(isolated copy of the real 30 fps talking-head project).
+
+Through the visible packaged UI:
+
+1. Selected video clip `id-4` and scrolled to the Inspector color-grade section.
+2. Scrubbed Lift R to `0.10`, Gamma R to `1.79`, and Gain R to `0.82`.
+3. The native preview changed immediately from the source blue to purple,
+   visibly proving that the controls are rendered rather than inert metadata.
+4. Four undo operations restored Lift/Gamma/Gain to `0.00/1.00/1.00` and the
+   default blue image. Four redo operations restored `0.10/1.79/0.82` and the
+   purple image.
+5. Saved, returned Home, reopened the project from Recents, selected `id-4`, and
+   confirmed all values persisted. The fresh session correctly showed disabled
+   undo and redo controls.
+6. Native playback advanced from frame 0 to frame 224 (`00:07:14`) with the grade
+   active and without a stall or crash.
+7. Captured native frame 0 and exported the complete timeline through the
+   packaged application's export dialog.
+
+The precise persisted values (scrubbing retains sub-display precision) are:
+
+```json
+{"id":"id-4","colorGrade":{"exposure":0.0,"temperature":0.0,"tint":0.0,"liftGammaGain":{"lift":{"r":0.0961456298828125,"g":0.0,"b":0.0},"gamma":{"r":1.793203125,"g":1.0,"b":1.0},"gain":{"r":0.8197265625,"g":1.0,"b":1.0}},"contrast":0.0,"saturation":1.0}}
+```
+
+- `project.json` SHA-256:
+  `213859fd864f1717ade84c0c291a07a7ad51127e87c22b6ee897c0e65e96f6a6`
+- post-capture `media.json` SHA-256:
+  `0189ca41d6ae79eab408b4dd7081a4105151fd186321c91926cc69d47041a2fe`
+
+## Preview/export parity
+
+The complete packaged export probes as:
+
+- H.264, 1920 x 1080, 30/1 fps, 920 frames
+- AAC audio
+- duration `30.666667` seconds
+- size `280672` bytes
+- SHA-256:
+  `620d1b4133feeabf2a4e75a90ee2204cfffa91fa29829ed8575af975c2033b34`
+
+Native preview frame 0 and exact exported frame 0 were compared with the bundled
+FFmpeg:
+
+- SSIM: `0.999283` (`31.445265` dB)
+- PSNR average: `38.469386` dB
+- both frames: PNG, 1920 x 1080
+
+The only difference is expected H.264 chroma/quantization loss; the purple LGG
+result and geometry match visually.
+
+## Artifacts
+
+- `lgg-packaged-ui-2026-07-31.jpg` — packaged Inspector plus visibly graded
+  preview.
+- `lgg-preview-frame-0-2026-07-31.png` — native packaged preview.
+- `lgg-export-2026-07-31.mp4` — complete packaged-app export.
+- `lgg-export-frame-0-2026-07-31.png` — exact exported comparison frame.
+
+## Result
+
+Task 8 is verified from typed model/command boundaries through CPU math, wgpu,
+packaged Inspector editing, undo/redo, save/reopen, native playback, and complete
+export parity.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/linked-audio-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/linked-audio-real-device-2026-08-01.md
new file mode 100644
index 00000000..5f997d79
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/linked-audio-real-device-2026-08-01.md
@@ -0,0 +1,29 @@
+# MR-linked-audio-complete packaged-runtime evidence — 2026-08-01
+
+## Scope and package identity
+
+This acceptance run used `target/release/bundle/macos/OpenTake.app`. The final executable SHA-256 was `942aa7d0e432c270146d04a025c5c3632b61333e17f92369d7152295d6bd20c8`; strict deep code-sign verification passed. The bundle remains ad-hoc signed with no Team ID, so this is packaged-runtime evidence rather than Developer ID notarization.
+
+The deterministic source was `/private/tmp/opentake-linked-audio-silent-20260801.mp4`, SHA-256 `ee12524fb8a661a396b2b578e06ae6d2e06cdd2ec80b3e42faa69afe45901b4f`. It is five seconds of H.264 640×360 at 30 fps and has no audio stream. The isolated saved project was `/private/tmp/opentake-linked-audio-real-device-20260801.opentake`.
+
+## Code boundary
+
+- `cargo test -p opentake-agent does_not_link_audio_when_source_has_no_audio` executed `add_clips_does_not_link_audio_when_source_has_no_audio` and `insert_clips_does_not_link_audio_when_source_has_no_audio`: 2 passed, 0 failed.
+- `cargo test -p opentake-media video_with_zero_channel_audio_has_no_audio`: 1 passed, 0 failed.
+- The owning Agent tests were introduced by `a2f34cb`; the zero-channel probe regression was introduced by `9920468`. Because the inherited implementation already satisfied the contract, the current acceptance baseline was GREEN and no artificial RED was manufactured.
+
+The effective gate is `place_clip`: linked audio requires all four conditions `add_linked_audio`, video target, video source type, and `has_audio`. `resolve_media_kind` carries the manifest value into both Agent command paths. FFprobe audio streams that explicitly report zero channels produce `has_audio=false`; an absent audio stream does likewise in the real fixture.
+
+## Packaged UI and persistence
+
+In the rebuilt desktop application:
+
+1. A new empty project was saved through the native Save panel.
+2. The source was imported through the native Import panel. The material library showed exactly one five-second video item.
+3. Double-clicking the item added it to the timeline. The accessibility tree showed exactly one track label, `V1`, with one clip. No `A1` or `A2` label or audio clip was created.
+4. Playback advanced visibly from `00:00:00` to `00:01:05` of `00:05:00`.
+5. The persisted `media.json` entry recorded `type:"video"` and `hasAudio:false`.
+6. The persisted `project.json` contained one video track and one video clip. The clip had no serialized `linkGroupId`.
+7. Export completed with the visible message `导出完成 · 1280×720 · 150 帧`.
+
+The exported file was `/private/tmp/opentake-linked-audio-real-device-20260801.mp4`, SHA-256 `1b01b65af6d3c6e8524b21a42ff6010de2e7ba69f9f361f858bb416d6d306e96`. Independent FFprobe inspection found a single H.264 video stream at 1280×720, 30 fps, duration 5.000 seconds, and no audio stream. This verifies import, timeline placement, playback, persistence, and export parity for the silent-video boundary.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/loudness-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/loudness-real-device-2026-08-01.md
new file mode 100644
index 00000000..a6602fd8
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/loudness-real-device-2026-08-01.md
@@ -0,0 +1,49 @@
+# MR-loudness packaged runtime evidence — 2026-08-01
+
+## Scope and package identity
+
+- Exact application: `target/release/bundle/macos/OpenTake.app`
+- Executable SHA-256: `43ca7cdc03657dfeb3c361595aeba0b17a5fcae625c74d7ede405bd9557095f8`
+- Code signature: valid strict/deep ad-hoc signature; CDHash `38b143d0e3f43a22d778e30ec647fd9905837baf`; no TeamIdentifier. This is runtime evidence, not a notarized Beta artifact.
+- Project: `/private/tmp/opentake-loudness-real-device-20260801.opentake`
+
+## Code verification
+
+- RED: `cargo test -p opentake-media --test loudness normalization_reaches_configured_lufs_within_tolerance -- --exact` failed before the new analysis owner existed.
+- GREEN: focused media loudness, domain persistence/wire-schema, project compatibility, undo/redo, Tauri routing/playback/export and Web Inspector/API tests passed.
+- `cargo test --workspace --all-targets --quiet`: PASS; existing environment-only integrations remained ignored.
+- `cargo clippy --workspace --all-targets -- -D warnings`: PASS.
+- `cargo fmt --all -- --check` and `git diff --check`: PASS.
+- `npm --prefix web test -- --run`: PASS, 90 files / 814 tests.
+- `npm --prefix web run build`: PASS with the pre-existing large-chunk and ineffective-dynamic-import warnings only.
+- `tauri build --bundles app --no-sign`: PASS; the resulting bundle was ad-hoc signed and passed strict/deep verification.
+
+## Packaged application workflow
+
+All UI actions below were performed against the exact release `.app` through macOS accessibility and native file/save panels.
+
+- Imported deterministic 48 kHz mono speech and music WAV fixtures.
+- Speech analysis displayed `-32.0 → -16.0 LUFS`, `+18.0 dB`, `-2.1 dBTP` after the final codec-margin fix.
+- Music analysis displayed `-27.4 → -16.0 LUFS`, `+11.8 dB`, `-2.3 dBTP`.
+- Analyze/apply, reanalyze, reset, undo and redo changed/restored the expected Inspector state.
+- Native playback advanced the transport for normalized speech and music.
+- Save and application relaunch reopened the project writable and restored the persisted speech normalization. A missing compatibility descriptor initially caused a read-only reopen; adding `loudnessNormalization` to `Clip::WIRE_FIELDS` plus the known-schema/wire-schema regression fixtures fixed it before acceptance.
+- A real one-second silent WAV returned `loudness_silent_audio: no block passed the EBU R128 absolute gate` and did not create a normalization result.
+
+## Independent export measurements
+
+The first speech export exposed an AAC reconstruction overshoot (`-16.09 LUFS / -0.23 dBTP`) with a one-dB codec margin. The shared preview/export safety margin was raised to two dB, the package was rebuilt, and both deliverables were re-exported from the GUI.
+
+| Fixture | Deliverable | FFmpeg `loudnorm` input I | input TP | Result |
+| --- | --- | ---: | ---: | --- |
+| Speech | `/private/tmp/opentake-loudness-speech-export-v2-20260801.mp4` | -16.07 LUFS | -1.15 dBTP | PASS |
+| Music | `/private/tmp/opentake-loudness-music-export-20260801.mp4` | -16.02 LUFS | -1.74 dBTP | PASS |
+
+Both files are five-second 1920×1080 H.264/AAC, 30 fps, 48 kHz mono exports. Acceptance is target `-16 LUFS ±1 LU` and true peak no hotter than `-1 dBTP`.
+
+- Speech SHA-256: `39985024152dd103db6ba02579dc16379d9dcb28855b12ae75588903d9017fd8`
+- Music SHA-256: `6f87d13f5f56377a8bb8cb78e169a12248c3056f656b4cf5d6b6194eb6f7493c`
+
+## Verdict
+
+MR-loudness is PASS for code, packaged macOS runtime, persistence, error handling, native preview and exported-deliverable measurements. This verdict covers Task 11 only and does not remove the project-wide Beta release blockers.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/lut-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/lut-real-device-2026-07-31.md
new file mode 100644
index 00000000..0af29b37
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/lut-real-device-2026-07-31.md
@@ -0,0 +1,149 @@
+# 3D LUT packaged-app verification (2026-07-31)
+
+## Scope
+
+This record closes implementation-plan Task 10 (`MR-lut`). It covers bounded
+`.cube` parsing, project-managed content-addressed storage, transactional clip
+editing, real GPU sampling, packaged preview/playback/export, and save/reopen.
+
+This is local functional evidence only. It is not Developer ID signing,
+notarization, or a Beta release claim.
+
+## RED and GREEN evidence
+
+The owning test was added before implementation and initially failed to compile
+because `CubeLut`, `LutReference`, `GpuLutTexture`, `upload_lut_3d`, the render
+plan field, and the resolver method did not exist.
+
+Exact RED/GREEN command:
+
+`cargo test -p opentake-render --test lut malformed_and_oversized_luts_fail_closed_and_valid_lut_matches_preview_export -- --exact --nocapture`
+
+It now passes on the real Metal/wgpu device. The test verifies:
+
+- malformed, oversized, and unsupported 16-point inputs fail closed;
+- valid 17-point identity and 33-point known-transform tables parse;
+- identity output remains within two code values;
+- a known transform at 75% intensity visibly changes the expected channels;
+- fresh preview and export renders are byte-identical;
+- JSON save/reopen preserves the path-free reference.
+
+The command test additionally verifies apply, intensity adjustment, removal,
+undo, and redo. Project storage tests verify bounded no-follow reads and complete
+Save As copying of `media/luts`. Tauri tests verify absolute-path enforcement,
+symlink refusal on Unix, pre-copy validation, and SHA-256-addressed publication.
+
+## Implementation boundary
+
+- `CubeLut` accepts UTF-8 `.cube` input up to 4 MiB, exactly one ordered domain,
+  and complete 17- or 33-point 3D tables with finite bounded values.
+- A clip persists only `{id, name, intensity}`. The external import path is not
+  retained; runtime paths are derived as `media/luts/<sha256>.cube`.
+- Import validates a no-follow regular source through a retained project identity
+  workflow before atomically publishing the managed asset.
+- Preview, native playback, MCP inspection, and export resolve the same managed
+  bytes, verify their content hash, parse them again, and fail closed on missing
+  or tampered assets.
+- RGBA16F 3D textures use texel-center-aligned hardware trilinear sampling after
+  the primary grade/HSL chain and before the generic effect chain.
+- Inspector provides native `.cube` selection, filename, intensity, removal,
+  explicit errors, and the shared transactional undo/redo route.
+
+## Workspace and package gates
+
+- `cargo fmt --all -- --check`: passed.
+- `cargo clippy --workspace --all-targets -- -D warnings`: passed. Cargo only
+  repeated the repository's existing future-incompatibility notice for
+  `block 0.1.6`.
+- `cargo test --workspace --all-targets --quiet`: passed; existing tests that
+  explicitly require optional external fixtures remained ignored by design.
+- `pnpm -C web test`: 89 files, 810 tests passed.
+- `pnpm -C web build`: passed with the existing non-blocking bundle-size and
+  ineffective-dynamic-import warnings.
+- `web/node_modules/.bin/tauri build --bundles app --no-sign`: passed.
+
+Tested application:
+`target/release/bundle/macos/OpenTake.app`
+
+- executable SHA-256:
+  `f8fbeaa1149652dde3175d2421274b6cb38280835ac755f2254f2106c4e5318f`
+- ad-hoc CDHash: `acd9d8f381353d0bdbf10a4d498850ea965a15e5`
+- `codesign --verify --deep --strict --verbose=2`: passed, including bundled
+  `ffmpeg` and `ffprobe`.
+- `Signature=adhoc`, `TeamIdentifier=not set`; this proves local bundle integrity
+  only.
+
+## Packaged application workflow
+
+Fixture project:
+`/private/tmp/opentake-lut-ui-real-device-20260731.opentake`
+
+Imported LUT:
+`/private/tmp/opentake-lut-ui-swap-rb-17.cube`
+
+- size: 147473 bytes / 4917 lines
+- SHA-256:
+  `f9828fe9741ec855e6e2b6184de48471171ff906108d7c5e1f28bf1ca897d7ee`
+- transform: `[r,g,b] -> [b,g*0.5,r]`
+
+Through the visible packaged UI:
+
+1. Created a native Save As copy of the prior real-device project and selected
+   blue video clip `id-4`.
+2. Imported the valid 17-point LUT through the native `.cube` picker. Inspector
+   showed `opentake-lut-ui-swap-rb-17`, the undo action became available, and the
+   preview changed immediately from lavender-purple to vivid magenta.
+3. Set intensity to `0.350`; preview moved to the expected intermediate color.
+   Undo restored `1.000`, and redo restored `0.350`.
+4. Removed the LUT, observed `未选择`, then undid removal and recovered the LUT
+   and its `0.350` intensity.
+5. Saved, returned Home, reopened from Recents, and confirmed the name, intensity,
+   and preview persisted while the new-session undo/redo stack was empty.
+6. Native playback advanced from `00:00:00` to `00:06:18` with the LUT active.
+7. Exported the complete timeline through the packaged H.264 export dialog.
+
+After the final browser-fallback validation hardening, the bundle was rebuilt,
+re-signed, reopened from Home, and again showed the persisted LUT and `0.350`
+intensity with an empty history. Its native playback advanced from `00:00:00`
+to `00:08:02`, and the complete export below was repeated from that final hash.
+
+Persisted clip state:
+
+```json
+{"id":"id-4","lut":{"id":"f9828fe9741ec855e6e2b6184de48471171ff906108d7c5e1f28bf1ca897d7ee","name":"opentake-lut-ui-swap-rb-17","intensity":0.35}}
+```
+
+The managed copy exists only at
+`media/luts/f9828fe9741ec855e6e2b6184de48471171ff906108d7c5e1f28bf1ca897d7ee.cube`
+and has the same SHA-256 as the import. The project contains no external LUT
+source path.
+
+- `project.json` SHA-256:
+  `e8d96cfa1a4fc2d227dfcc22ecf9542db93139b75dc0708572b075784ff8beb2`
+
+## Complete export
+
+`/private/tmp/opentake-lut-ui-final-package-20260731.mp4` probes as:
+
+- H.264, 1920 x 1080, 30/1 fps, 920 frames
+- AAC audio, 1439 frames
+- duration `30.666667` seconds
+- size `279902` bytes
+- SHA-256:
+  `908bde76040bbb653fc8f791a22dae5b0c776aff8da84fa33f5501e23f6cfc37`
+
+Bundled FFmpeg sampled the opaque center of frame 0:
+
+- source: RGB `[52, 89, 138]`
+- prior packaged HSL-only export: RGB `[169, 100, 158]`
+- packaged HSL + 35% LUT export: RGB `[167, 86, 161]`
+
+The red/blue movement and green attenuation match the authored transform and
+intensity. The owning real-GPU test supplies the exact identity and
+preview/export byte-parity tolerances without lossy codec noise.
+
+## Result
+
+Task 10 is verified from typed bounded parsing and project-managed storage
+through transactional Inspector editing, fresh-session persistence, native
+playback, and complete packaged export.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31.md
new file mode 100644
index 00000000..af858cdd
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31.md
@@ -0,0 +1,74 @@
+# MR-mask-rendering real-device receipt — 2026-07-31
+
+## Candidate
+
+- Source branch: `agent/advanced-ai-workflows`
+- Packaged app: `target/release/bundle/macos/OpenTake.app`
+- Executable SHA-256: `05e9b2c16b8e418170330082d0996991af6b9bc614d8f33eb5eb5ea07b69656e`
+- Code signature: local ad-hoc signature; `codesign --verify --deep --strict`
+  passed after the exact candidate bundle was re-signed.
+- Validation project:
+  `target/runtime-validation/mr-optical-flow/OpticalFlow60.opentake`
+
+## Required RED receipt
+
+The reviewed planned test
+`linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export`
+was added before implementation. It failed on the first polygon pixel with
+`pixel=(0,0) expected=0 actual=255`, proving that the previous GPU polygon path
+was a full-coverage no-op.
+
+## Code verification
+
+- `cargo test -p opentake-render --test gpu_effects circle_mask_clips_to_center -- --exact` — pass.
+- `cargo test -p opentake-render --test gpu_effects linear_circle_and_polygon_masks_match_cpu_reference_in_preview_and_export -- --exact` — pass on the local GPU for linear, circle, and polygon shapes at feather `0` and `0.18`, with preview/export bytes equal and every channel within 3 levels of the CPU reference.
+- `pnpm -C web test` — 89 files, 805 tests passed.
+- `pnpm -C web build` — production build passed.
+- `cargo fmt --all -- --check` — pass.
+- `cargo clippy --workspace --all-targets -- -D warnings` — pass.
+- `cargo test --workspace --no-fail-fast` — pass; seven pre-existing real-device probes remain intentionally ignored by the unit gate.
+
+The command layer rejects more than four masks or polygon paths outside 3–16
+points, so the fixed GPU uniform cannot silently truncate editor/Agent changes.
+
+## Packaged UI verification
+
+All actions below were executed through the packaged `.app`, not a development
+server:
+
+1. Reopened the saved 60 fps project and enabled a mask on its video clip.
+2. Switched Circle to the enabled `Pen / Polygon` option.
+3. Dragged P1 directly in Preview from `(0.250, 0.250)` to approximately
+   `(0.143, 0.140)`; the overlay and Inspector updated together.
+4. Added P5 `(0.300, 0.800)`, then deleted P5.
+5. Undid the point drag (P1 returned to `0.250`) and redid it (P1 returned to
+   `0.143`).
+6. Set mask offset X `0.100`, rotation `20°`, feather `0.100`, and invert on.
+   Preview showed the rotated/translated polygon and the expected reversed soft
+   boundary over the moving white-square fixture.
+7. Saved, quit, reopened, and reselected the clip. Shape, four points, offset,
+   scale, rotation, feather, and invert persisted exactly; the reopened undo
+   stack was correctly empty.
+8. Exported `H.264`, `1920×1080`, `60/1 fps`, `2.000 s`, exactly `120` decoded
+   frames, then captured the same preview frames through the packaged app.
+
+The persisted mask payload in `project.json` contains the four edited polygon
+points plus `feather: 0.1`, `invert: true`, `offset.x: 0.1`, identity scale, and
+`rotationDegrees: 20.0`.
+
+## Preview/export pixel comparison
+
+Artifacts live in
+`runtime-artifacts/automated/mask-rendering-2026-07-31/`:
+
+- `preview-frame-000.png` / `export-frame-000.png`: pixel-identical, SSIM 1.0 and infinite PSNR.
+- `preview-frame-060.png` / `export-frame-060.png`: soft inverted polygon boundary is visible; SSIM `0.999753`, average PSNR `62.854540 dB`.
+- `mask-runtime-h264-1080p.mp4`: playable H.264 export, 120 frames.
+
+SHA-256:
+
+- `export-frame-000.png`: `bc17b329a39fdc77b8db61cd72ecf8b8da7a7881e329096c412bce91fc531ab8`
+- `export-frame-060.png`: `eb5c7e2399a9b4c6d77c96ec3bcd1e30a9778d8c040d5372085c86c83f241cc4`
+- `mask-runtime-h264-1080p.mp4`: `362f5f959ccb3756b7a30d3fb387a78870620c64e8e8ed3923dbf8bf3fcd7231`
+- `preview-frame-000.png`: `564fe64317b8abae9bc593ee47aca81a6790fc8fea2e1fbfdb34e093f6a10add`
+- `preview-frame-060.png`: `1feb50b313e7072920cc486199bea36749f49ba5d2345e7937742380e08e147d`
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31/export-frame-000.png b/docs/audit/2026-07-14/runtime-artifacts/automated/mask-rendering-2026-07-31/export-frame-000.png
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/media-render-packaged-ffmpeg-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/media-render-packaged-ffmpeg-real-device-2026-07-31.md
new file mode 100644
index 00000000..c478c664
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/media-render-packaged-ffmpeg-real-device-2026-07-31.md
@@ -0,0 +1,165 @@
+# Media Render Task 33 — Packaged FFmpeg real-device evidence (2026-07-31)
+
+Status: **cross-platform acceptance complete.** The exact-source macOS bundle
+and Windows installed NSIS package have both passed the owning real-media smoke
+without relying on ambient `PATH`.
+
+## Bound contract
+
+- Plan: `media-render-playback-export-implementation.md`, Task 33
+  (`implementation-slice-ddfcf34d5292a998`).
+- Candidate: `requirement-ff2faf0938e25f39`.
+- Owning test:
+  `scripts/tests/packaged-sidecars-test.rb#packaged_macos_windows_sidecars_resolve_and_execute`.
+
+## RED receipt
+
+The owning test was added before the supply implementation and run exactly as
+planned:
+
+```text
+$ ruby scripts/tests/packaged-sidecars-test.rb --name packaged_macos_windows_sidecars_resolve_and_execute
+missing sidecar supply-chain lock: .../scripts/ffmpeg-sidecars.lock.json
+exit 1
+```
+
+The first provisioning attempt also correctly rejected the upstream tag label
+as insufficient evidence: the pinned Apple Silicon asset under release
+`b6.1.1` actually reports `ffmpeg version 6.0`. The final lock therefore records
+the executable-reported version per target/tool in addition to URL and SHA-256.
+
+## Code and supply-chain evidence
+
+- `scripts/ffmpeg-sidecars.lock.json`: immutable release URLs, exact reported
+  versions, and SHA-256 for macOS arm64/x64 and Windows x64.
+- `scripts/provision_ffmpeg_sidecars.py`: bounded target allowlist, retrying
+  download, streaming SHA-256, executable version verification, atomic publish,
+  and removal of only its own named partial files.
+- `src-tauri/tauri.macos.conf.json` and `src-tauri/tauri.windows.conf.json`:
+  platform-specific Tauri `externalBin` entries for both tools.
+- `crates/opentake-media/src/ff.rs#packaged_sidecar_beside`: accepts only a
+  regular non-symlink sibling of the running executable.
+- `src-tauri/src/lib.rs#resolve_media_tools`: an intact packaged pair overrides
+  ambient variables; a release package with a missing tool pins the missing
+  sibling path and fails closed instead of searching developer `PATH`.
+- `.github/workflows/ci.yml#windows-product`: provisions the Windows target,
+  runs the source smoke with an empty PATH, builds MSI/NSIS, silently installs
+  NSIS, then runs the owning test against the installed directory.
+- The package includes the repository GPL/NOTICE and
+  `resources/ffmpeg/SOURCE.md`.
+
+## Automated GREEN receipts (macOS arm64)
+
+```text
+$ python3 scripts/provision_ffmpeg_sidecars.py --verify-only
+verified src-tauri/binaries/ffmpeg-aarch64-apple-darwin
+verified src-tauri/binaries/ffprobe-aarch64-apple-darwin
+
+$ ruby scripts/tests/packaged-sidecars-test.rb --name packaged_macos_windows_sidecars_resolve_and_execute
+PASS: packaged_macos_windows_sidecars_resolve_and_execute
+
+$ cargo test -p opentake-media packaged_sidecar
+2 passed; 0 failed
+
+$ cargo test -p opentake-tauri --test security_config
+4 passed; 0 failed
+
+$ cargo test --workspace --no-fail-fast
+all workspace unit, integration, and doc-test binaries passed; only tests marked
+with their existing explicit real-device fixture requirements were ignored
+
+$ cargo clippy --workspace --all-targets -- -D warnings
+exit 0
+
+$ cargo clippy -p opentake-tauri --no-default-features --all-targets -- -D warnings
+exit 0
+
+$ pnpm -C web test
+82 files passed; 774 tests passed
+```
+
+The owning smoke clears `PATH` for every sidecar invocation, creates a 64×36
+video, verifies ffprobe metadata, decodes one exact RGBA frame, encodes a 32×18
+output, and probes the output again.
+
+## Packaged `.app` receipt
+
+Build:
+
+```text
+$ web/node_modules/.bin/tauri build --debug --bundles app
+Finished 1 bundle at target/debug/bundle/macos/OpenTake.app
+```
+
+The bundle contained `Contents/MacOS/opentake`, `ffmpeg`, and `ffprobe`, plus the
+GPL/NOTICE/source resources. Before local signing, the two packaged sidecars
+matched the locked source digests exactly:
+
+```text
+ffmpeg  a90e3db6a3fd35f6074b013f948b1aa45b31c6375489d39e572bea3f18336584
+ffprobe bb2db6f5d8cef919da12fbf592119a987202a8c060a886f3cab091f9cab90b64
+```
+
+The app and nested sidecars were then ad-hoc signed for this local candidate.
+Signing changes the Mach-O file digest, so the final installed/package gate
+verifies each nested code signature, locked reported version, and the complete
+media smoke rather than incorrectly requiring the pre-sign digest:
+
+```text
+$ ruby scripts/tests/packaged-sidecars-test.rb --name packaged_macos_windows_sidecars_resolve_and_execute --package target/debug/bundle/macos/OpenTake.app
+PASS: packaged_macos_windows_sidecars_resolve_and_execute
+
+$ codesign --verify --deep --strict --verbose=2 target/debug/bundle/macos/OpenTake.app
+... ffmpeg validated
+... ffprobe validated
+OpenTake.app: valid on disk
+OpenTake.app: satisfies its Designated Requirement
+```
+
+## Packaged UI/runtime receipt
+
+The exact app binary was launched with a minimal system `PATH` and deliberately
+invalid `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE` values. The packaged sibling pair
+therefore had to override both injected values for media decoding to work.
+
+In the real Tauri WebView:
+
+1. Home loaded with six persisted recent projects.
+2. `opentake-ds-legacy-real-device.opentake` opened and rendered its imported
+   PNG plus the existing audio waveform.
+3. `TalkingHeadQA.opentake` opened in explicit compatibility read-only mode
+   (because it contains the independently tracked `transitionOut` field), while
+   its real 30-second video still produced a visible `talking-head-30s` image,
+   duration, tracks, and audio waveform. There was no blank media library or
+   missing-FFmpeg error despite the poisoned ambient paths.
+4. The application was exited after inspection; no project edit was made.
+
+## Windows x64 installed-package receipt
+
+The first exact-head Windows run for `21f7e9ebe1a4e16a16d1ef7931f48d7ee9e9fc62`
+([run 30612593449](https://github.com/appergb/OpenTake/actions/runs/30612593449))
+passed provisioning and the source-side empty-`PATH` probe/decode/encode smoke.
+It did not reach installer creation because a Web documentation-owner test
+hard-coded the local checkout directory name. The same run also exposed two
+Windows Tauri test jobs that compiled before provisioning the new external
+binaries. Both CI portability defects are now covered by regression contracts;
+neither partial run is an installed-package receipt.
+
+The corrected exact-SHA workflow then completed on source
+`9eeeb6ffe3088a16f19946ceb7db5e90090356ac`:
+
+- workflow: [run 30614001607](https://github.com/appergb/OpenTake/actions/runs/30614001607), success;
+- product job: [Windows product build, bundle, install, and smoke](https://github.com/appergb/OpenTake/actions/runs/30614001607/job/91102897263), success;
+- uploaded artifact: `opentake-windows-9eeeb6ffe3088a16f19946ceb7db5e90090356ac`, artifact ID `8787369512`, 546,654,352 bytes, server digest `sha256:f287f5a9309245b9e415b55d52b72c75ddaaae1651fccfe03bfc8c15514b3a63`;
+- MSI: `target/release/bundle/msi/OpenTake_1.0.0_x64_en-US.msi`, 283,295,744 bytes, SHA-256 `2dfe332521214fab8892be21bd5800e2708cf38161fa0c401c3602be507c6dd7`;
+- NSIS: `target/release/bundle/nsis/OpenTake_1.0.0_x64-setup.exe`, 263,758,072 bytes, SHA-256 `d85002098bdf6883811251261947d399800140fa3cc2c2850bc7e3fbceedb95c`.
+
+The job provisioned the locked Windows sidecars, passed the source empty-`PATH`
+smoke, built both native installers, silently installed the NSIS package, found
+the installed application directory from Windows itself, and passed
+`packaged_macos_windows_sidecars_resolve_and_execute` against that installed
+directory. It then bound the uploaded installer receipt to the same source SHA.
+
+This closes the Task 33 cross-platform installed-package criterion. It does not
+claim the independently tracked distribution-signing/notarization criteria in
+Data Safety Task 10.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/motion-tracking-agent-backend-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/motion-tracking-agent-backend-2026-08-01.md
new file mode 100644
index 00000000..efd2cf0f
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/motion-tracking-agent-backend-2026-08-01.md
@@ -0,0 +1,50 @@
+# Motion tracking Agent/backend evidence — 2026-08-01
+
+Scope: Task 3 sub-slice `requirement-fdd45062091b48f3`. The production backend,
+Agent boundary, Inspector/Preview interaction, persistence, and export path are
+now complete. Only the final packaged Beta GUI pass remains open.
+
+## Production path
+
+- `track_motion` is a strict, capability-gated MCP/Chat tool. Hosts without a production advanced-workflow bridge do not advertise it and direct dispatch fails closed.
+- The desktop bridge resolves the selected ordinary video clip from one authoritative project snapshot, decodes at most 48 source-aligned frames, tracks only the normalized selected rectangle, and checks cancellation throughout.
+- Successful analysis returns editable linear position keyframes, algorithm/version provenance, and minimum confidence. Preview is the default and does not mutate the timeline.
+- Confidence below 0.25 returns `MCP_ANALYSIS_LOW_CONFIDENCE`; invalid rectangles/ranges, missing sources, cancellation, and stale project revisions do not commit.
+- `apply=true` writes the complete position track through `EditCommand::SetKeyframes` at the analyzed project revision. It is one ordinary undoable transaction.
+- The desktop command boundary exposes the same capability through
+  `advanced_track_motion`. The Inspector accepts an exact half-open clip range,
+  normalized numeric region fields, cancellation/retry, result confidence and
+  keyframe count, Apply, and visible Undo.
+- “Select region in preview” replaces the ordinary transform overlay with a
+  crosshair rectangle editor. Reverse-direction drags and out-of-canvas drags
+  are normalized and clamped; any region/range change invalidates the reviewed
+  result before Apply can be used.
+
+## RED/GREEN evidence
+
+The reviewed Agent test first failed because `track_motion` was not a typed tool. The media test then failed to compile because `track_region_motion` and `NormalizedMotionRegion` did not exist.
+
+Passing focused commands:
+
+```text
+CARGO_INCREMENTAL=0 cargo test -p opentake-media analysis::stabilization::tests::region_tracker_keeps_known_subject_center_within_five_pixels -- --exact --nocapture
+CARGO_INCREMENTAL=0 cargo test -p opentake-tauri advanced::tests:: --lib -- --nocapture
+CARGO_INCREMENTAL=0 cargo test -p opentake-agent --test advanced_ai_workflows
+CARGO_INCREMENTAL=0 cargo clippy -p opentake-agent -p opentake-media -p opentake-tauri --all-targets -- -D warnings
+```
+
+The synthetic 96×72 three-frame target moves by `(8,4)` pixels. The final normalized track converts back within five pixels on both axes. The desktop test generates a 12-frame H.264 MP4 with FFmpeg, imports and places it through the real `AppCore`, obtains a mutation-free preview, applies the returned keyframes, saves and reopens the exact position track, exports all 12 frames through the production H.264 renderer, performs one undo, and verifies a pre-cancelled retry leaves the timeline unchanged.
+
+The final integrated code gate passed:
+
+- `cargo fmt --all -- --check`;
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri --lib`: 416/416;
+- default and no-default-feature Tauri Clippy with `-D warnings`;
+- `npm test`: 119 files / 880 tests, including the Inspector flow, preview
+  rectangle normalization, cancellation/stale-result isolation, and Tauri
+  command parity;
+- `npm run build` (existing chunk advisories only).
+
+## Remaining acceptance
+
+- Packaged macOS GUI evidence retained with the Beta release run.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-export-2026-07-31.mp4 b/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-export-2026-07-31.mp4
new file mode 100644
index 00000000..893c17e1
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md
new file mode 100644
index 00000000..616ce759
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-compound-real-device-2026-07-31.md
@@ -0,0 +1,146 @@
+# Nested timeline / compound clip real-device evidence (2026-07-31)
+
+Status: **macOS packaged acceptance complete.** This receipt closes the shared
+runtime criteria for Media Render Task 2 (`MR-nested-timeline`) and Preview /
+Timeline Task 2 (`compound-clips`). It does not claim Developer ID signing,
+notarization, or Windows UI acceptance.
+
+## Bound contracts
+
+- `media-render-playback-export-implementation.md`, Task 2,
+  `implementation-slice-b8f61feebde4e2ab` /
+  `requirement-bedfdc6edfa147b9`.
+- `preview-timeline-implementation.md`, Task 2,
+  `implementation-slice-0ef5268789b6e13f` /
+  `requirement-b49e0f5ed8c2415c`.
+- Owning tests:
+  - `crates/opentake-render/tests/nested_timeline.rs#nested_edits_preview_and_export_same_frames`
+  - `crates/opentake-project/tests/compound_roundtrip.rs#compound_clip_roundtrips_nested_timeline`
+  - `crates/opentake-render/tests/compound_render.rs#compound_clip_preview_export_frames_match`
+
+## Historical RED receipt
+
+The exact planned tests were run in an isolated detached worktree at
+`8bea548`, the parent of the nested-timeline implementation commit. All three
+commands exited 101 because their owning test targets did not exist:
+
+```text
+no test target named `nested_timeline`
+no test target named `compound_roundtrip`
+no test target named `compound_render`
+historical-red-exits nested=101 roundtrip=101 render=101
+```
+
+During packaged validation, the first build also exposed a real linked-audio
+paste failure:
+
+```text
+粘贴失败：TauriCommandError: entries[1]: asset type is not compatible with the destination track
+```
+
+The audio lane correctly retained `sourceClipType=video` because it decodes
+from the original video asset. Destination validation incorrectly used that
+source-container type instead of the placed `mediaType=audio`. The corrected
+validator and regression test now preserve both meanings.
+
+## Automated GREEN receipts
+
+```text
+$ cargo test -p opentake-render --test nested_timeline nested_edits_preview_and_export_same_frames -- --exact
+1 passed; 0 failed
+
+$ cargo test -p opentake-project --test compound_roundtrip compound_clip_roundtrips_nested_timeline -- --exact
+1 passed; 0 failed
+
+$ cargo test -p opentake-render --test compound_render compound_clip_preview_export_frames_match -- --exact
+1 passed; 0 failed
+
+$ cargo fmt --all -- --check
+exit 0
+
+$ cargo clippy --workspace --all-targets -- -D warnings
+exit 0 (only the existing future-incompatibility notice for block 0.1.6)
+
+$ cargo test --workspace --no-fail-fast
+all workspace unit, integration, and doc-test binaries passed; only the seven
+explicit real-device probe tests remained ignored
+
+$ npm --prefix web test -- --run
+88 files passed; 801 tests passed
+
+$ npm --prefix web run build
+exit 0 (existing bundle-size and ineffective-dynamic-import warnings only)
+```
+
+## Packaged application receipt
+
+The release bundle was produced with the repository-locked Tauri CLI 2.11.3:
+
+```text
+$ web/node_modules/.bin/tauri build --bundles app
+Finished 1 bundle at target/release/bundle/macos/OpenTake.app
+```
+
+The unsigned local bundle was fully ad-hoc signed for this machine, including
+the packaged `ffmpeg` and `ffprobe` sidecars. Strict verification passed:
+
+```text
+$ codesign --verify --deep --strict --verbose=2 target/release/bundle/macos/OpenTake.app
+OpenTake.app: valid on disk
+OpenTake.app: satisfies its Designated Requirement
+```
+
+This local ad-hoc signature is runtime evidence only; it is not a distributable
+Developer ID / notarization receipt.
+
+## Packaged GUI and persistence receipt
+
+The exact release `.app` was operated through the macOS accessibility surface:
+
+1. Created `MRNestedTimeline.opentake` through the native Save panel.
+2. Imported deterministic 4-second red/440 Hz and blue/660 Hz H.264/AAC media
+   through the native multi-file Open panel.
+3. Added both assets to the root timeline, selected the linked blue video/audio
+   pair, and invoked **创建复合片段** from the timeline context menu.
+4. Double-clicked the compound to enter its child timeline. The breadcrumb
+   displayed **← 主时间线 / 复合片段**.
+5. Trimmed the linked child pair by 10 source frames and nudged it right by 5
+   frames. The persisted pair became `startFrame=15`, `durationFrames=110`,
+   `trimStartFrame=10` with the original shared link group.
+6. Copied the pair, moved the child playhead to its corrected local end
+   (`00:04:05 / 00:04:05`), and pasted. The new video/audio pair began at frame
+   125, preserved the trim and `sourceClipType=video`, and received a fresh
+   shared link group.
+7. Returned to the root timeline. At `00:04:10`, the paused composite showed
+   the nested blue frame. Continuous packaged playback advanced to `00:06:19`
+   while retaining the blue nested composite.
+8. Saved, returned Home, reopened the project, re-entered the compound, and
+   observed all four child clip IDs across V1/A1.
+
+The persisted `project.json` used for the final reopen had SHA-256
+`53373a35cb56f4adf3a09c3212000a4168e29c6737496623cfaacf262811b2f4`.
+
+## Export receipt
+
+The packaged Export dialog completed 231 frames and reported
+`导出完成 · 1280×720 · 231 帧`. Packaged `ffprobe` then reported:
+
+```text
+video: h264, 1280x720, 30/1 fps
+audio: aac, 48000 Hz, mono
+duration: 7.700000 seconds
+size: 86668 bytes
+```
+
+Tracked exact artifacts:
+
+- `nested-timeline-compound-export-2026-07-31.mp4` — SHA-256
+  `96a8a3cbb772336e389a101f98a2c77fe965a7a0459ac16d8a558474901f9434`
+- `nested-timeline-export-frame-1s-2026-07-31.png` — red root frame,
+  SHA-256 `d82eff581346e21a5633ae9927b982b4e3838786c49ee6429028cb321b7fbf0a`
+- `nested-timeline-export-frame-5s-2026-07-31.png` — blue nested frame,
+  SHA-256 `fe97190f271c2abe496a3658073c238eafe4c11e3649920be56be39aec7f9ecd`
+
+The two decoded frames prove the exported file crosses from the root red clip
+into the live nested blue sequence; the AAC stream proves linked nested audio
+was included by the same flattened render plan.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-export-frame-1s-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-export-frame-1s-2026-07-31.png
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-export-frame-5s-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/nested-timeline-export-frame-5s-2026-07-31.png
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/object-removal-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/object-removal-vertical-2026-08-01.md
new file mode 100644
index 00000000..7a04ca1a
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/object-removal-vertical-2026-08-01.md
@@ -0,0 +1,65 @@
+# Object Removal Vertical — 2026-08-01
+
+## Delivered surface
+
+- The strict `remove_object` Agent contract is advertised by the desktop host
+  because this build always includes the local implementation.
+- The provider/model pair is explicitly reported as `opentake-local` /
+  `opentake-boundary-fill-v1`; unsupported provider or model names fail closed
+  instead of implying an unavailable hosted service.
+- The selected editable vector mask and absolute project-frame range form part
+  of a content-addressed derivative key together with source SHA-256, trim,
+  duration, and timeline FPS.
+- Preview decodes the ordinary forward 1x source, applies deterministic
+  boundary propagation only inside the selected range, preserves feathered
+  mask edges, encodes ProRes 422, retains source audio, and does not mutate the
+  project.
+- The Inspector provides mask editing through the existing mask controls plus
+  range fields, preview, cancellation, retry, inline video review, Apply, and
+  Undo. Editing the mask invalidates a previously reviewed preview.
+- Apply publishes the exact reviewed cache bytes through the retained no-follow
+  project-media capability, registers source/range/mask/provider/model
+  provenance, and swaps the selected clip to the derivative.
+- Media registration, clip replacement, and clearing the now-baked editable
+  masks form one durable edit transaction. Undo restores source media and
+  masks; redo and save/reopen restore the derivative. The original asset stays
+  in the media manifest.
+
+## Automated evidence
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri advanced::tests --lib -- --nocapture`
+  - five advanced-workflow tests passed;
+  - the object-removal test uses a real eight-frame H.264/AAC fixture;
+  - a sampled frame outside the requested range retains the object while a
+    sampled frame inside the range removes it;
+  - preview leaves timeline and manifest unchanged;
+  - a nonexistent mask fails without changing timeline, manifest, or version;
+  - Apply preserves audio and provenance, and the published file SHA-256 equals
+    the reviewed preview SHA-256 consumed by playback/export;
+  - Undo/redo and save/reopen restore the expected media reference and masks;
+  - a pre-cancelled cached request returns typed cancellation.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-ops motion_media_transaction_tests --lib`
+  - four tests passed, including one-entry swap/clear Undo and Redo.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-core motion_media_commit --lib`
+  - three durable media-commit tests passed, including outside-bundle and
+    symlink refusal without mutation.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-core generated_media_commit_refuses_version_drift_without_mutation --lib`
+  - a project edit made while generation is running refuses the stale commit
+    atomically, preventing a reviewed mask or range from being overwritten.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-tauri -p opentake-core -p opentake-ops --all-targets -- -D warnings`
+  - passed.
+- `npm test -- --run`
+  - all 113 web test files passed: 867 tests, including preview failure/retry,
+    cancellation with stale-completion rejection, apply/undo, compatibility,
+    missing-mask refusal, and an Apply response that arrives after the baked
+    mask has already been cleared from the timeline mirror.
+- `npm run build`
+  - TypeScript and the production Vite bundle passed; existing chunk-size and
+    ineffective-dynamic-import warnings remain non-fatal.
+
+## Remaining acceptance evidence
+
+Packaged macOS GUI verification and final delivery-export inspection remain
+required before `requirement-be73dca02523d3b0` is closed. These run after the
+full code gate so the evidence represents the Beta candidate rather than an
+intermediate development build.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-export-2026-07-31.mp4 b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-export-2026-07-31.mp4
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index 00000000..9752b0e8
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-real-device-2026-07-31.md
new file mode 100644
index 00000000..dee2f3d8
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-24-to-60-real-device-2026-07-31.md
@@ -0,0 +1,131 @@
+# Optical-flow 24-to-60 real-device evidence (2026-07-31)
+
+Status: **macOS packaged acceptance complete for Media Render Task 3.** This
+receipt closes `MR-optical-flow`; it does not claim Developer ID signing,
+notarization, Windows acceptance, or Beta release readiness.
+
+## Bound contract
+
+- `media-render-playback-export-implementation.md`, Task 3,
+  `implementation-slice-c85c1acc35668396` /
+  `requirement-5933e802c9dfe372`.
+- Owning test:
+  `crates/opentake-render/tests/optical_flow.rs#two_frame_fixture_is_deterministic_and_matches_preview_export`.
+- Quality regression:
+  `crates/opentake-render/tests/optical_flow.rs#optical_flow_tracks_opposing_local_motion_without_global_frame_shift`.
+
+## Historical RED receipt
+
+The reviewed owning test was added before the implementation and the exact
+planned command exited 101. Compilation reported the five missing product
+boundaries: media interpolation types, media conversion/interpolation
+functions, render interpolation config/types, and the resolver interpolation
+method. This is the expected RED for a previously absent backend.
+
+## Automated GREEN receipts
+
+```text
+$ cargo test -p opentake-render --test optical_flow two_frame_fixture_is_deterministic_and_matches_preview_export -- --exact
+1 passed; 0 failed
+
+$ cargo test -p opentake-render --test optical_flow
+2 passed; 0 failed
+
+$ cargo fmt --all -- --check
+exit 0
+
+$ cargo clippy --workspace --all-targets -- -D warnings
+exit 0 (only the existing future-incompatibility notice for block 0.1.6)
+
+$ cargo test --workspace --no-fail-fast
+all workspace unit, integration, and doc-test binaries passed; only the seven
+explicit real-device probe tests remained ignored
+```
+
+The owning test verifies endpoint-stable 24-to-60 mapping, exact source alpha
+values, deterministic pixel output, monotonic motion, preview/export policy
+parity, explicit nearest/blend/error fallback behavior, and invalid-rate
+rejection. The second regression uses two regions moving in opposite directions
+so a single whole-frame translation cannot satisfy the fixture.
+
+## Packaged application receipt
+
+The release application was rebuilt with the repository-locked Tauri CLI and
+the final local block-motion implementation:
+
+```text
+$ web/node_modules/.bin/tauri build --bundles app
+Finished 1 bundle at target/release/bundle/macos/OpenTake.app
+
+$ codesign --verify --deep --strict --verbose=2 target/release/bundle/macos/OpenTake.app
+OpenTake.app: valid on disk
+OpenTake.app: satisfies its Designated Requirement
+```
+
+The local bundle was ad-hoc signed, including packaged `ffmpeg` / `ffprobe`.
+That proves local integrity only and is not a distributable signature.
+
+## Packaged GUI receipt
+
+The exact release `.app` was operated through the macOS accessibility surface.
+A project was created through the native Save panel. Because the current
+project-format UI displays FPS but does not edit it, the saved fixture's
+`project.json` was set from 30 to 60 fps while the application was closed, then
+reopened through the Home screen. The packaged UI displayed both the `60` badge
+and `帧率 60 fps`. Importing the 320x180, 24 fps motion fixture raised the
+expected format-mismatch dialog; **保持当前设置** retained the 1920x1080,
+60 fps project.
+
+The deterministic fixture is 48 H.264 frames over 2 seconds. Its white square
+moves from source x=20..59 to x=22..61 between frames 0 and 1; at the project
+scale those left edges are x=120 and x=132. At project frame 1 (1/60 second),
+the packaged paused preview capture had bounding box:
+
+```text
+x=126..363, y=421..658
+```
+
+The x=126 left edge lies strictly between the two source positions, proving an
+interpolated motion frame rather than nearest-frame repetition. A second
+packaged capture using the multi-region `testsrc2` fixture visually retained
+the stationary color regions while interpolating local motion; it exposed no
+whole-frame translation.
+
+## Export and preview/export parity receipt
+
+The packaged Export dialog produced `optical-flow-24-to-60-export-2026-07-31.mp4`.
+`ffprobe` and the decoded output frame reported:
+
+```text
+codec=h264
+width=1920
+height=1080
+avg_frame_rate=60/1
+duration=2.000000
+nb_frames=120
+export frame 1 bbox: x=126..363, y=421..658
+preview/export frame 1 SSIM: 0.999515
+preview/export frame 1 PSNR: 63.644069 dB
+```
+
+The identical motion bounding box proves temporal parity. The remaining pixel
+difference is the expected H.264 encode loss; the in-memory owning test asserts
+bit-exact preview/export resolver output before encoding.
+
+Tracked exact artifacts:
+
+- `optical-flow-moving-square-input-2026-07-31.mp4` — SHA-256
+  `2c344578e303e5c2c4a727eac1ea3ce79bb1a9e4aa6b40ab6535e4b8363f3c69`
+- `optical-flow-preview-frame-001-2026-07-31.png` — SHA-256
+  `7d306ac1e3e5e891404d89bfcca2c4b067ca3324f8c63d02c55ff077cc5eedd4`
+- `optical-flow-24-to-60-export-2026-07-31.mp4` — SHA-256
+  `35d7c230db896e9559509a203421cc31a4d0651dea30c9a24a68db90e7d459f6`
+- `optical-flow-export-frame-001-2026-07-31.png` — SHA-256
+  `5adfddf3bc52bd666d24a24158fba4baa159af1f9e68d2ce86e6c37d3582fdae`
+- `optical-flow-complex-preview-frame-001-2026-07-31.png` — SHA-256
+  `02eb6dee137db6053833fe02d923014c770f86c00a98450923bcd056cb13c130`
+
+This task's mapped preview boundary is the high-quality paused composite path.
+The separately governed low-latency continuous-playback stream retains its
+existing real-time frame-normalization policy; this receipt makes no claim that
+the streaming decoder runs the same block-motion algorithm.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-complex-preview-frame-001-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-complex-preview-frame-001-2026-07-31.png
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-moving-square-input-2026-07-31.mp4 b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-moving-square-input-2026-07-31.mp4
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-preview-frame-001-2026-07-31.png b/docs/audit/2026-07-14/runtime-artifacts/automated/optical-flow-preview-frame-001-2026-07-31.png
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index 00000000..fc4404b2
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/playback-route-lifecycle-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/playback-route-lifecycle-real-device-2026-08-01.md
new file mode 100644
index 00000000..03dff061
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/playback-route-lifecycle-real-device-2026-08-01.md
@@ -0,0 +1,66 @@
+# Playback route/lifecycle packaged real-device evidence — 2026-08-01
+
+Parent: `MR-playback-route-lifecycle-complete`
+
+Environment: macOS arm64, final packaged release application, Chinese UI. The
+application executable SHA-256 was
+`a92c3e31d503300b87806ecd36aec48ba3128c49f202c9c78167e301b6f75711`;
+the DMG SHA-256 was
+`040d44146f224c0aedc45cafe0cf333bae5fa10eaad3ae8c820e1f2b0fc99e57`.
+The whole app, signed DMG, and mounted-DMG app passed strict/deep signature
+verification. The signature is ad hoc, so this is package-integrity evidence,
+not Developer ID/notarization evidence.
+
+## Reviewed code owners
+
+The current baseline already contained the reviewed Wave 1A implementation, so
+the focused baseline was GREEN rather than an artificially recreated RED.
+
+- `playbackRoute.test.ts#routes plain forward video to WebKit` passed.
+- `nativePlaybackSession.test.ts#publishes only increasing matching frame sequences`
+  passed.
+- `rustFrameBuffer.test.ts#keeps two stable Rust frame image slots mounted`
+  passed.
+- `playback::resolver::tests::drain_propagates_stream_failure_instead_of_freezing_cache`
+  passed.
+- The focused Web commands execute the current Vitest configuration's full
+  suite; each run passed 93 files / 824 tests.
+- Task16's immediately preceding full Rust workspace gate, strict Clippy,
+  formatting, Web suite, and production build passed, and no product source
+  changed between that gate and this reconciliation.
+
+## Packaged WebKit route
+
+Project:
+`/private/tmp/opentake-task16-bounded-audio-real-device-20260801.opentake`.
+Its project document contains one visible ordinary video track and no
+compositor-only property, which deterministically selects the WebKit route.
+
+- The project opened at `00:00:00 / 01:00:00` after a different project had
+  been active.
+- Playback advanced to `00:02:23 / 01:00:00` and paused normally.
+- The correct 60-second duration and zero start after the project boundary show
+  that the preceding Rust session's playhead/publication did not leak into the
+  replacement project.
+
+## Packaged Rust route
+
+Project: `/private/tmp/opentake-hsl-ui-real-device-20260731.opentake`. Its
+persisted timeline has visible text, a color-graded video, multiple visible
+video tracks, and an audio track. `resolveTimelinePlaybackRoute` therefore
+selects Rust rather than WebKit.
+
+- Playback advanced from `00:00:00 / 00:30:20` to
+  `00:03:07 / 00:30:20`.
+- Pause settled at `00:03:16`; a second observation 1.8 seconds later remained
+  `00:03:16`.
+- The composited project remained visible while the playhead advanced; no stale
+  terminal image, black fallback, or previous-project duration was exposed.
+
+## Result
+
+`MR-playback-route-lifecycle-complete` is **PASS** as a reconciliation slice.
+The authoritative route, exact session identity, monotonic publication,
+retained two-slot handoff, decode failure propagation, and project-boundary
+reset have direct owning tests; the final package smoke covers both production
+routes and a cross-project lifecycle boundary.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/recent-project-card-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/recent-project-card-real-device-2026-07-30.md
new file mode 100644
index 00000000..71357aaa
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/recent-project-card-real-device-2026-07-30.md
@@ -0,0 +1,25 @@
+# Recent project card acceptance — 2026-07-30
+
+Scope: Home Shell Task 12 (`implementation-slice-8e481b772d7d2357`) on the current arm64 debug bundle at `target/debug/bundle/macos/OpenTake.app`.
+
+## Code verification
+
+- Baseline RED: `pnpm -C web exec vitest run src/components/home/HomeView.interaction.test.tsx -t 'control-9697b53d4d2cf1ca select or open a recent project card'` exited 1 because the planned owning runner did not exist.
+- Added the exact candidate-named interaction test for single-click selection, focus selection, Enter opening, and double-click opening through `openProjectPath(entry.path)`.
+- Focused result: 1 file / 1 test passed. Nearby Home visual result: 11/11 passed.
+- Regression result: 72 Web files / 727 tests passed; the production Web build and complete Rust workspace passed.
+
+## Product correction
+
+The original recent-card root was a pointer-only `div`. It was replaced with a real named button carrying `aria-pressed`, and its remove control remains a separate sibling button. Focus and single click select the path; the existing launcher Return handler and double-click both call the same project-open boundary. Return events from other focused interactive controls are ignored, preventing a stale card selection from opening alongside another Home action.
+
+## Real-device verification
+
+1. The initial pointer-only build exposed `TalkingHeadQA` and `Untitled` only as text in the macOS accessibility tree, confirming the product-level RED.
+2. Rebuilt the exact app and terminated two pre-existing debug instances before launching a single current bundle, preventing stale-process evidence from being mixed with the candidate.
+3. The fresh accessibility tree exposed `toggle button TalkingHeadQA, Value: off` and `toggle button Untitled, Value: off`.
+4. A single click selected `TalkingHeadQA` (`Value: on`) while the app remained on Home.
+5. Tab focus reached `TalkingHeadQA`; pressing Return opened the editor with the expected `talking-head-30s` media and 29:20 timeline.
+6. Returned Home and invoked a native two-click activation (`click_count: 2`) on `TalkingHeadQA`; it opened the same editor and project content.
+
+Result: PASS. The planned pointer, keyboard, accessibility, and project-open paths agree in the packaged application.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/schema-safe-persistence-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/schema-safe-persistence-real-device-2026-07-31.md
new file mode 100644
index 00000000..457deb56
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/schema-safe-persistence-real-device-2026-07-31.md
@@ -0,0 +1,59 @@
+# HS-schema-safe-persistence packaged macOS evidence — 2026-07-31
+
+## Scope
+
+- Plan: `home-shell-implementation.md`, Task 6 `HS-schema-safe-persistence`
+- App: `target/debug/bundle/macos/OpenTake.app`
+- Project: `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`
+- Host: packaged macOS app, exercised through the native accessibility tree
+
+## Code contract
+
+The store persists only five global UI preferences, each in its own versioned
+key:
+
+- `opentake.ui.v1.layoutPreset`
+- `opentake.ui.v1.agentPanelVisible`
+- `opentake.ui.v1.mediaPanelVisible`
+- `opentake.ui.v1.inspectorPanelVisible`
+- `opentake.ui.v1.keyframesPanelVisible`
+
+The exact owning test covers defaults; every valid and invalid current value;
+valid and invalid legacy unprefixed values; one-time valid migration; isolated
+per-action writes; fresh-store rehydration; unavailable/throwing reads; rejected
+writes; and exclusion of view, playhead, selection, and maximize session state.
+
+## Gates
+
+- True focused RED: the planned test failed because `createEditorUiStore` did
+  not exist and the old singleton could not prove a fresh-session boundary.
+- True focused GREEN: 1/1.
+- Plan-form focused command executed after implementation.
+- Web regression: 74 files / 747 tests passed.
+- Web production build passed.
+- `./web/node_modules/.bin/tauri build --debug` passed and produced both the app
+  and debug DMG.
+- The preceding Task 7 full Rust workspace and formatting gates passed; Task 6
+  changes only TypeScript store persistence, its tests, and documentation.
+
+## Packaged restart sequence
+
+1. Opened `TalkingHeadQA` from Home. The existing unprefixed preferences were
+   accepted and migrated: Agent reopened visible while Media and Inspector used
+   their stored/default visibility.
+2. Selected a text clip and opened the Keyframes panel.
+3. Applied Vertical layout, kept Agent visible, and hid Media and Inspector.
+   The packaged screen showed the expected distinct vertical geometry.
+4. Terminated that exact debug app process and relaunched the same bundle.
+5. The app correctly started at Home, proving `view=editor` was not persisted.
+6. Reopened `TalkingHeadQA`: Vertical layout and Agent-visible/Media-hidden/
+   Inspector-hidden preferences were restored. Playhead was `00:00:00` and every
+   timeline clip was unselected, proving project/session state did not leak.
+7. Re-enabled Inspector and selected the text clip. The Keyframes lanes appeared
+   immediately without pressing the Keyframes button, proving that preference
+   also survived the process restart.
+8. Restored Default layout, Agent off, Media and Inspector visible, Keyframes
+   closed, and cleared selection for the final app state.
+
+No project file, timeline command, media entry, or external output was written
+by this verification.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/script-to-video-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/script-to-video-vertical-2026-08-01.md
new file mode 100644
index 00000000..ed764b9c
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/script-to-video-vertical-2026-08-01.md
@@ -0,0 +1,23 @@
+# Script-to-video vertical — 2026-08-01
+
+`requirement-30bcd764cc0c454d` is implemented through the capability-gated Agent contract and the enabled Smart Pack / Script-to-Video panel.
+
+- Planning validates exact visual and narration media IDs, source duration, narration duration within one project frame, script bounds, frame durations, and supported cross-dissolve transitions.
+- The canonical plan is SHA-256 identified and persists planner/version provenance, script, media IDs, narration IDs, transition choices, start frame, and durations in `project.json` before assembly clips exist. `apply=true` refuses an unreviewed or changed plan.
+- Applying uses one `ApplyScriptAssemblyPlan` document transaction to add fresh visual/narration tracks, mute source visual audio where narration exists, preserve existing tracks, and bind outgoing transitions to exact adjacent clip IDs. One undo removes the complete assembly while retaining its reviewed plan.
+- Cancellation/failure before commit leaves no partial tracks. The panel exposes editing, add/remove segment, plan review, retry, progress phases, cancel, apply, and undo, and ignores stale async completions.
+
+Focused verification:
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-ops script_assembly -- --nocapture` — 2 passed.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri script_to_video_three_segment -- --nocapture` — passed using three real PNG sources plus real WAV narration; proved persisted preview, cancel atomicity, 3+3 aligned clips, two bound transitions, one undo, save/reopen, and an 18-frame H.264/AAC export whose audio stream probes successfully.
+- `npm test -- ScriptToVideoTab.test.tsx` — 2 passed (review/edit/retry/apply/undo and cancel/stale-result isolation).
+
+Full slice gates after integration:
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-domain -p opentake-ops -p opentake-project -p opentake-agent -p opentake-tauri` — passed, including the real script assembly/export integration; only the repository's seven explicitly ignored real-device probes remained ignored.
+- `npm test` — 116 test files and 874 tests passed.
+- `cargo fmt --all -- --check` — passed.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-domain -p opentake-ops -p opentake-project -p opentake-agent -p opentake-tauri --all-targets -- -D warnings` — passed. Cargo reported only the pre-existing future-incompatibility notice for transitive `block v0.1.6`.
+- `npm run build` — passed. Vite retained the existing dynamic-import and large-chunk advisories.
+- `git diff --check` — passed.
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/stabilization-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/stabilization-real-device-2026-07-31.md
new file mode 100644
index 00000000..7f7fe566
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/stabilization-real-device-2026-07-31.md
@@ -0,0 +1,113 @@
+# Stabilization real-device evidence (2026-07-31)
+
+Status: **macOS packaged acceptance complete for Media Render Task 5.** This
+receipt closes `MR-stabilization`; it does not claim Developer ID signing,
+notarization, Windows acceptance, or Beta release readiness.
+
+## Bound contract
+
+- `media-render-playback-export-implementation.md`, Task 5,
+  `implementation-slice-7ef9369889a0a0d6` /
+  `requirement-20198476e9083261`.
+- Owning test:
+  `crates/opentake-render/tests/stabilization.rs#synthetic_shake_produces_editable_undoable_preview_export_solution`.
+
+## Historical RED and GREEN receipts
+
+The owning test was added before implementation. The exact planned command
+exited 101 with eight missing API/type errors across the domain, media, ops, and
+render boundaries. After implementation:
+
+```text
+$ cargo test -p opentake-render --test stabilization synthetic_shake_produces_editable_undoable_preview_export_solution -- --exact
+1 passed; 0 failed
+
+$ pnpm -C web test
+89 files passed; 806 tests passed
+
+$ cargo fmt --all -- --check
+exit 0
+
+$ cargo clippy --workspace --all-targets -- -D warnings
+exit 0 (only the existing future-incompatibility notice for block 0.1.6)
+
+$ cargo test --workspace --no-fail-fast
+all workspace unit, integration, and doc-test binaries passed; only the seven
+explicit real-device probe tests remained ignored
+```
+
+The owning test verifies that a deterministic jitter sequence has lower
+post-stabilization displacement, the safety crop covers every output corner,
+preview/export sample the exact same composed transform, apply/reset are
+non-destructive, and undo restores the prior document. Media tests cover block
+motion and cooperative cancellation; Tauri tests cover single-flight token
+cancellation and command routing; Web tests cover the Inspector and native
+playback route.
+
+## Packaged application receipt
+
+The release application was rebuilt with the repository-locked Tauri CLI. The
+final binary SHA-256 was:
+
+```text
+fcea9121b4b26fe1fdf191cd03734c54e5685fc0ddf7909dfec15c39235aed4a
+```
+
+`codesign --verify --deep --strict --verbose=2` reported the ad-hoc signed app
+valid on disk and satisfying its designated requirement, including packaged
+`ffmpeg` and `ffprobe`. This proves local integrity only.
+
+## Packaged GUI receipt
+
+An isolated 1920×1080, 60 fps project containing a 2-second 320×180, 24 fps
+synthetic jitter clip was opened through the native project picker in the exact
+release `.app`. The Inspector analysis produced
+`opentake.motion-smoothing v1` with 48 motion samples. The UI then verified:
+
+- strength 100% → 65%; additional crop 0% → 3%;
+- undo restored crop to 0%, redo returned it to 3%;
+- reset removed the track and undo restored the complete 65% / 3% solution;
+- explicit save and quit/reopen retained model/version, source identity, 48
+  keyframes, strength, and crop while starting with an empty history stack;
+- the clip media reference and source file were unchanged.
+
+The persisted correction track had maximum absolute horizontal correction
+0.0075 and conservative coverage zoom. A playback-routing defect found during
+this run was fixed so every stabilized clip uses the desktop compositor rather
+than WebKit's source-video path.
+
+## Cancellation receipt
+
+A separate 60-second 3840×2160 long-GOP fixture kept analysis running long
+enough to exercise cancellation. The packaged UI remained interactive while
+showing `正在分析运动…` and `取消分析`. Clicking cancel immediately restored the
+existing 48-sample solution, emitted no error, and left both undo and redo
+disabled. The decode/motion work runs on a background blocking task so the
+cancel command can be dispatched concurrently.
+
+## Export and preview/export parity
+
+The packaged Export dialog produced `stabilization-export-2026-07-31.mp4`:
+
+```text
+codec=h264
+width=1920
+height=1080
+pixel_format=yuv420p
+avg_frame_rate=60/1
+duration=2.000000
+nb_frames=120
+preview/export frame 0 SSIM: 0.999557
+preview/export frame 0 PSNR: 56.843845 dB
+```
+
+Tracked artifacts:
+
+- `stabilization-input-2026-07-31.mp4` — SHA-256
+  `2c344578e303e5c2c4a727eac1ea3ce79bb1a9e4aa6b40ab6535e4b8363f3c69`
+- `stabilization-preview-frame-000-2026-07-31.png` — SHA-256
+  `24e959f29c3f324923f77322d7cab8225df3cca6b98eec1a7a05f153cba598f5`
+- `stabilization-export-2026-07-31.mp4` — SHA-256
+  `18440c7d62fb4afc38c28a1399a5f31a833fe3606befb9a2b3f22bca54a6ed4f`
+- `stabilization-export-frame-000-2026-07-31.png` — SHA-256
+  `58c14f1af53bd275e15e934b442a6d1526c3e4ee8e777587944d307bb818749a`
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/stem-separation-agent-vertical-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/stem-separation-agent-vertical-2026-08-01.md
new file mode 100644
index 00000000..edcafdc0
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/stem-separation-agent-vertical-2026-08-01.md
@@ -0,0 +1,58 @@
+# Stem Separation Agent / Track-Import Vertical — 2026-08-01
+
+## Delivered surface
+
+- The capability-gated `separate_stems` Agent tool now invokes the same local,
+  integrity-checked `opentake-center-v1` owner as the Inspector. Unsupported
+  hosted providers/models fail closed and no upload adapter is implied.
+- Separation produces two ordinary audio assets with stable IDs and persisted
+  source asset/SHA-256, execution, model SHA-256, stem kind, and output index.
+- Existing Inspector progress, cancellation, retry, local-privacy copy, hosted
+  consent refusal, and result state are retained. Each completed asset now has
+  an inline native audio audition.
+- A reviewed pair can be placed at the current playhead on two independent
+  aligned audio tracks. Both placements form one `Import Stems To Tracks` undo
+  entry; Undo removes both tracks while keeping reusable stem media in the
+  catalog.
+- The Agent `importToTracks` option uses the same separate-track transaction and
+  returns both placed clip IDs and the action name.
+- The local release profile remains intentionally scoped to centred dialogue
+  plus complementary stereo side content. It is not represented as arbitrary
+  semantic Demucs/MDX separation.
+
+## Automated evidence
+
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-media --test stems -- --nocapture`
+  - deterministic 48 kHz stereo mixture passed;
+  - vocals improved SDR by at least 12 dB;
+  - accompaniment achieved at least 60 dB against the documented
+    mono-compatible reference;
+  - the sum of published stems reconstructed that documented mixture at at
+    least 60 dB SDR;
+  - model integrity, progress endpoints, cancellation cleanup, and hosted
+    fail-closed behavior passed.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-tauri stem_bridge_imports_provenance_aligned_tracks_undo_reopen_and_cancel --lib -- --nocapture`
+  - a real WAV source produced two persisted provenanced assets;
+  - both three-frame outputs were placed at frame 45 on separate audio tracks;
+  - one Undo removed both tracks while retaining the two media assets;
+  - Redo plus save/reopen restored both tracks and all three media entries;
+  - a pre-cancelled repeat added no media or tracks.
+- `CARGO_INCREMENTAL=0 cargo test -p opentake-ops aligned_stem_track_tests --lib`
+  - overlapping aligned entries use separate fresh tracks and one undo entry.
+- `CARGO_INCREMENTAL=0 cargo clippy -p opentake-media -p opentake-ops -p opentake-tauri --all-targets -- -D warnings`
+  - passed.
+- `npm test -- --run`
+  - all 114 web test files passed: 871 tests;
+  - focused UI/IPC coverage includes progress, cancellation, audition elements,
+    aligned-track import at the playhead, and Undo.
+- Existing packaged-runtime evidence in
+  `runtime-artifacts/automated/stems-real-device-2026-08-01.md` verifies local
+  privacy/failure/success paths, source/model hashes, direct asset preview,
+  cancellation cleanup, save/reopen, and independent packaged exports.
+
+## Remaining acceptance evidence
+
+The newly added explicit audition and aligned-track controls still require a
+final packaged macOS GUI pass in the assembled Beta candidate. The existing
+packaged evidence already covers the underlying separation assets and export
+path; this final pass closes the updated interaction surface.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/stems-real-device-2026-08-01.md b/docs/audit/2026-07-14/runtime-artifacts/automated/stems-real-device-2026-08-01.md
new file mode 100644
index 00000000..59619256
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/stems-real-device-2026-08-01.md
@@ -0,0 +1,37 @@
+# MR-stems packaged-runtime evidence — 2026-08-01
+
+## Scope and package identity
+
+Task 13 was exercised in the rebuilt release bundle at `target/release/bundle/macos/OpenTake.app`. The final executable SHA-256 was `942aa7d0e432c270146d04a025c5c3632b61333e17f92369d7152295d6bd20c8`; strict deep code-sign verification passed. The bundle is ad-hoc signed and has no Team ID, so this evidence is local packaged-runtime verification, not Developer ID notarization or a publishable Beta signature.
+
+The saved test project was `/private/tmp/opentake-stems-real-device-20260801.opentake`. Its deterministic five-second stereo mixture was `/private/tmp/opentake-stems-mix-20260801.wav` (SHA-256 `295804e62dcc5d5f4f8146b78c485ac19823c98529ee025455c2c368d5530524`). The vocal reference SHA-256 was `835ee1c4414a75acc6ce87b9d3f2ad0f37b3f190e9e1958c08c051906524c2c6`; the final mono-compatible accompaniment reference SHA-256 was `444f012257e20c6e4fe4d70e9fcb30c7c87d26e3429498c7226e4b4529c3f495`.
+
+## Privacy, failure and success paths
+
+- Hosted mode visibly required provider/model and upload consent. Submitting without consent returned the localized error `使用托管服务前必须确认上传源音频。`. Supplying labels and consent with no adapter returned `所选托管服务尚未配置可用的音轨分离适配器。`; no upload occurred.
+- Local mode displayed `完全在本机处理，音频不会上传。首次使用会安装并校验内置模型。` and completed with execution id `local:opentake-center-v1`.
+- The installed model profile was 104 bytes and matched SHA-256 `9c72ab220f370000a702fc11c8071905648a56d1102d9519659a6062abb4b376`.
+- The two results appeared as independent derived media assets. Save/reopen retained `generationInput` source/model hashes, selecting either asset exposed its resolved project-relative path and audio preview, and both could be placed on the timeline and played.
+
+The final derived job directory was `media/stems-686f5e60-a666-4768-87e5-f610c9f92d97`. Vocals SHA-256 was `8fc799724bb9ce760fd90447ba348a64b8af6eb4dc0092735731c8a8a3790f76`; accompaniment SHA-256 was `5ef6b291022bce125a10e1954ecaefce5223051a74b352cbd768403da70dda8a`. Direct PCM comparison measured `85.3732 dB` SDR for both vocal channels and `83.8316 dB` for both accompaniment channels.
+
+## Packaged export
+
+Each stem was independently exported through the normal timeline path:
+
+- `/private/tmp/opentake-stems-vocals-export-v2-20260801.mp4`, SHA-256 `8290427162eb6fb94fc591829017646299901b75ceeb42a288585aa129054428`, five seconds, H.264 1920×1080 plus AAC mono 48 kHz, `34.1008 dB` SDR against the vocal reference.
+- `/private/tmp/opentake-stems-accompaniment-export-v2-20260801.mp4`, SHA-256 `6031b6badec7a1b57eacbde3563ce92b2e93c497685a89081e08987656b258c2`, five seconds, H.264 1920×1080 plus AAC mono 48 kHz, `25.5688 dB` SDR against the mono-compatible accompaniment reference. Its mean level was `-13.2 dB`, confirming a non-silent export.
+
+The first side-channel implementation cancelled to silence in the mono export path. A focused regression failed at `-3.010 dB` for mono compatibility; publishing both stems as dual-mono fixed the actual export while preserving the deterministic centre/side boundary. This is a compatibility choice, not a claim of semantic source separation.
+
+## Cancellation and cleanup
+
+Cancellation was verified with `/private/tmp/opentake-stems-cancel-1800s-20260801.wav` (330 MiB, SHA-256 `072c31ef023f50d6f8a87ec88e42ca1adceec2f64e1489c866f63bc163aec4b6`). The packaged UI reached `正在分离音轨… 8 %`; `取消分离` returned it to idle. The media manifest remained at nine entries with only the imported source matching that fixture, no matching derived item, no new stem job directory, and no `.partial` or temporary output. A shorter 300-second fixture finished before cancellation could be observed and is not counted as cancellation evidence.
+
+## Runtime defects found and closed
+
+- Selecting the first generated asset initially produced a black WebView through an unstable Zustand selector. A RED Inspector regression reproduced `Maximum update depth exceeded`; deriving generation sections from the stable `items` selector fixed it.
+- Project-relative derived assets initially returned no path in `MediaItemDto`. A RED Rust test observed `None`; returning the resolved path fixed direct preview and timeline use.
+- The initial anti-phase accompaniment exported silently through the mono mixer. The focused mono-compatibility RED and the packaged export above verify the dual-mono correction.
+
+The local algorithm is an integrity-checked centre/side DSP profile suited to centred voice/dialogue fixtures. It is not a neural Demucs/MDX separator and does not close the broader semantic-separation gap for arbitrary mixes.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/subtitle-export-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/subtitle-export-real-device-2026-07-30.md
new file mode 100644
index 00000000..394f88c3
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/subtitle-export-real-device-2026-07-30.md
@@ -0,0 +1,65 @@
+# Subtitle SRT/VTT export automated + real-device evidence — 2026-07-30
+
+Scope: requirement `requirement-7043d6a44938bd27` / implementation slice `implementation-slice-3b2b0548dab34607`, plus the owning title-bar controls `control-c035467e6746e570` and `control-f54f4037ab7bffbe`.
+
+## Production path
+
+- `TitleBar.tsx#onExportSubtitles` exposes SRT and VTT from the editor title bar, closes the format menu, opens the native save panel with the correct extension filter, appends a missing extension, and reports done/empty/failure through the visible toast state.
+- `web/src/lib/api.ts#exportSubtitles` invokes the typed `export_subtitles` Tauri command with the selected path and format.
+- `src-tauri/src/commands.rs#export_subtitles` serializes the current caption clips through the domain SRT/VTT writers and returns the written cue count.
+
+## Automated evidence
+
+Focused tests:
+
+```text
+cargo test -p opentake-tauri exports_non_empty_srt_with_cue_count
+cargo test -p opentake-tauri exports_vtt_with_header
+pnpm -C web exec vitest run src/components/shell/TitleBar.visual.test.ts src/components/shell/TitleBar.interaction.test.tsx
+```
+
+The Rust tests each passed with one matching test. The two title-bar files passed with the exact planned SRT/VTT routing test and owning DOM controls for menu dismissal, native save-panel arguments, extension completion, typed API arguments, success, zero-cue empty state, write failure, user cancellation, and default-directory fallback.
+
+Regression gates:
+
+```text
+pnpm -C web test
+pnpm -C web build
+cargo fmt --check
+git diff --check
+```
+
+The final web regression passed 70 files / 709 tests; the focused owning filter passed all four matching subtitle-export cases. The production build completed. The full Rust workspace passed with zero failures and only the repository-declared ignored hardware probes. Workspace clippy passed with warnings denied. Vite emitted only the existing ineffective-dynamic-import and large-chunk warnings. Formatting and diff checks passed.
+
+## Real macOS application loop
+
+Application: `/Users/lvbaiqing/TRUE 开发/PRIMARY-CN/OpenTake-generation/target/debug/bundle/macos/OpenTake.app`.
+
+Project: `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`, reopened from the saved talking-head cleanup fixture with four regenerated caption clips.
+
+Using the visible title-bar `导出字幕` popup and the native macOS save panel:
+
+1. `字幕 · SubRip (.srt)` exported `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-cleaned.srt` and the application reported `字幕已导出 · 4 条`.
+2. `字幕 · WebVTT (.vtt)` exported `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-cleaned.vtt` and the application reported `字幕已导出 · 4 条`.
+
+Both files are non-empty (307 bytes) and contain exactly these four cues in timeline order:
+
+1. `Hello and welcome to this open take beta test`
+2. `today we are testing the talking head clean up workflow`
+3. `the accepted cuts should keep`
+4. `the audio and video perfectly synchronized`
+
+Format verification:
+
+- SRT contains numbered cues and comma millisecond timestamps, beginning `00:00:00,000 --> 00:00:02,866`.
+- VTT begins with `WEBVTT`, omits SRT numbering, and uses dot millisecond timestamps, beginning `00:00:00.000 --> 00:00:02.866`.
+- Cue 4 ends at `00:00:16.400`, within the 890-frame / 29.666-second edited timeline.
+
+SHA-256:
+
+- SRT: `8b68f2abff929d100b3b2c290aa3e4768825458a785eb99b465e2fbe786afe6b`
+- VTT: `fffe46a61b6a42e59dccea2484782b8feb9a09e6ea25ce35e03582017e8d4fe0`
+
+## Result
+
+The planned caption-export requirement is verified through code, owning automated tests, the Tauri command boundary, the real OpenTake UI, the native save panel, and the generated file contents. This closes only the SRT/VTT export slice; adjacent caption authoring, styling, and provider-driven workflows remain independently tracked.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/talking-head-cleanup-2026-07-29.md b/docs/audit/2026-07-14/runtime-artifacts/automated/talking-head-cleanup-2026-07-29.md
new file mode 100644
index 00000000..374cc5ad
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/talking-head-cleanup-2026-07-29.md
@@ -0,0 +1,91 @@
+# Talking-head cleanup automated + real-device evidence — 2026-07-29/30
+
+Scope: Task 3 sub-slice `requirement-9b922be7c8e92147`. The automated contract and a real macOS application loop now pass. This artifact still does not close the complete requirement because the Agent chat/provider-driven review surface was not exercised with a configured model credential.
+
+## Production path
+
+- `remove_filler_words` is a strict typed MCP/Chat tool backed by the production `MediaBridge::transcribe` path through `get_transcript`.
+- Configurable single- and multi-word filler phrases are normalized and matched against word-level project-frame timestamps.
+- Results are preview-only, carry stable review ids and `accepted: true`, and group selected half-open ranges into one undoable `ripple_delete_ranges` command per affected track.
+- The catalog omits transcript-dependent tools when no media bridge is present; direct dispatch then returns `Tool is not advertised`.
+- `tighten_silences` remains the PCM/RMS half of the same workflow and returns reviewable ripple commands without direct mutation.
+
+## RED evidence and defect found
+
+The initial `remove_filler_words_returns_reviewable_word_aligned_ranges` test failed with `Unknown tool: remove_filler_words` before the tool was added.
+
+After adding a fixed 30-second linked A/V fixture, `reviewed_filler_cut_applies_once_and_undo_restores_the_timeline` failed because the audio track retained a duplicate `[6,12)` middle fragment while the video track did not. Root cause: `clear_region` searched all tracks for the right half created by a linked split and could select the partner track's fragment. The fix scopes that lookup to the original clip's track, and a lower-level ripple regression now pins the behavior.
+
+The first real Whisper run exposed three additional production defects that synthetic word fixtures could not reveal:
+
+- whisper.cpp's experimental absolute token timestamps spread early words backwards through long leading silence, so filler cuts targeted silence rather than speech;
+- zero-duration lexical tokens such as `You [t,t]` were discarded, preventing `you know` from being reviewed as one phrase;
+- a fresh desktop process restarted the sequential core id generator at `id-1`, allowing regenerated captions to collide with ids loaded from the saved project.
+
+PCM edge alignment now tightens only long silent segment edges and remaps token positions into the audible interval. Lexical normalization retains zero-duration words and gives them non-overlapping reviewable spans. The production desktop wiring now uses UUID ids while deterministic sequential ids remain available to tests.
+
+The first caption regeneration after accepted cuts exposed one further defect: cached source-segment text still contained deleted fillers, so captions resurrected `Um`. Caption generation now rebuilds only cut segments from visible word runs, preserving original punctuation and split-token spelling (for example `synchron` + `ized` remains `synchronized`). A sync-locked derived caption follower also correctly refused a colliding ripple operation atomically; the validated workflow removes and regenerates derived captions around the linked A/V cleanup.
+
+## Focused GREEN commands
+
+```text
+cargo test -p opentake-ops ripple_delete_ranges_keeps_linked_av_frame_exact
+cargo test -p opentake-agent filler -- --nocapture
+cargo test -p opentake-agent --test advertised_tool_acceptance every_advertised_tool_is_live_or_absent -- --exact
+cargo test -p opentake-agent without_bridge
+cargo test -p opentake-agent system_prompt_includes_context_signal
+cargo test -p opentake-agent --test tool_argument_contract
+```
+
+All commands passed on the working tree. The fixed 30-second, 30 fps fixture proves:
+
+- `um` maps to `[6,12)` and `you know` maps to `[15,27)`.
+- Applying only `[6,12)` leaves `you know` in transcript order.
+- Linked video and audio both become `[(0,6),(6,894)]`, with no drift or duplicate fragment.
+- Selecting the linked video clip expands to its transcribed audio partner before matching, so a normal talking-head video selection does not silently return zero cuts.
+- One `undo` restores the exact prior timeline.
+
+## Regression gates
+
+```text
+cargo test -p opentake-ops --no-fail-fast
+cargo test -p opentake-agent --no-fail-fast
+cargo fmt --all -- --check
+cargo clippy --workspace --all-targets -- -D warnings
+cargo test --workspace --no-fail-fast -q
+cd web && pnpm build
+cd web && pnpm test
+git diff --check
+```
+
+All gates passed. The affected subsystem totals include 184 `opentake-ops` unit tests plus 55 command integration tests and 332 `opentake-agent` unit tests plus its integration suites. The full workspace completed with zero failures; only repository-declared ignored tests remained ignored. Web verification passed 70 files / 703 tests and the production build. Vite emitted the pre-existing ineffective-dynamic-import and large-chunk warnings; they are warnings, not build failures.
+
+## Real macOS application loop
+
+Application: exact current-branch debug bundle at `target/debug/bundle/macos/OpenTake.app`.
+
+Fixture and outputs:
+
+- source: `/tmp/opentake-beta-qa-20260729/talking-head-30s.mp4`, SHA-256 `fd4eae86104ed966d82bd1dfbbdf3feb5be4370fdfbacaba0a426f8acbe771bb`;
+- saved project: `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`;
+- Whisper model: `ggml-base.bin` (local 141 MB model);
+- export: `/tmp/opentake-beta-qa-20260729/TalkingHeadQA-cleaned.mp4`, SHA-256 `4f0724b28e1762c9a532f402f99fc2f28065b2fbe1c86a0681c880007558ffa6`.
+
+Observed and accepted review results:
+
+- corrected real-word spans placed `Um` at `[150,155)` and `You know` across `[357,366)`, inside the spoken audio rather than leading silence;
+- default filler review proposed `Um [151,154)` and `You know [358,365)`; both were accepted;
+- the linked video and audio tracks each became the same three fragments: timeline `[0,151)`, `[151,355)`, `[355,890)`, with source trims `0`, `154`, and `365` respectively;
+- the operation removed exactly 10 frames across the two linked tracks and shifted four fragments; post-cut transcription contained no `Um`, `You`, or `know`;
+- regenerated captions were exactly: `Hello and welcome to this open take beta test`; `today we are testing the talking head clean up workflow`; `the accepted cuts should keep`; `the audio and video perfectly synchronized`;
+- all regenerated caption ids were UUIDs and did not collide with existing A/V ids.
+
+The project was saved, the desktop process was fully terminated, the same build was restarted, and the saved project reopened at 890 frames (`00:29:20` at 30 fps) with all three linked A/V fragments and four captions intact.
+
+The real UI export produced H.264 1920×1080 at 30 fps with 890 decoded video frames and 29.666667 s video duration; AAC audio duration was 29.666000 s (0.000667 s difference). Visual inspection of seam and caption contact sheets found no black/broken seam frames and showed the four expected captions without deleted filler text. Contact-sheet hashes are `ed5c51e95860929c3d93a5405bf2cd146d8646fd7aa68f2b1808a8b7b29d3f6d` and `97f2ef75ec54a38229e93a70ab73f1cc712d022b892e034b9656804a82c7b674`.
+
+## Remaining requirement evidence
+
+- Exercise the same review/apply flow through the Agent chat UI with a configured model provider; the local tool contract was invoked directly because no provider credential was available in this test environment.
+- Exercise the combined filler + configured-silence review in that user-facing surface. Filler review/apply passed independently, while the existing silence workflow remains covered by automated PCM/RMS tests.
+- Retain durable release-run screenshots or packaged CI artifacts rather than relying only on the local temporary contact sheets recorded above.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/titlebar-controls-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/titlebar-controls-real-device-2026-07-30.md
new file mode 100644
index 00000000..71b69185
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/titlebar-controls-real-device-2026-07-30.md
@@ -0,0 +1,49 @@
+# TitleBar controls automated + real-device evidence — 2026-07-30
+
+Scope: `home-shell-implementation.md` Task 13 / `implementation-slice-1f94f01d3b65a701`, covering seven title-bar control records.
+
+## Automated evidence
+
+The exact planned tests now exist in `web/src/components/shell/TitleBar.interaction.test.tsx`:
+
+- `control-f52cc89817361a19 return from editor to Home`
+- `control-4bda8f075e1f3a14 open the global Library`
+- `control-ff132f94a8c87906 open Settings from the editor`
+- `control-d7ba227c6447e43e open Video Export`
+- `control-c035467e6746e570 open/close subtitle export formats`
+- `control-229710d0115f07bc open/close interchange export menu`
+- `control-02d1bf7fff7c1e3a open Video Export from the interchange menu`
+
+The focused filter passed all seven candidates. It proves the exact UI-store transitions, both popup menus' expanded state, Escape/outside-click dismissal, empty-timeline video-export disablement, populated-timeline enablement, and menu-to-dialog return path.
+
+Regression:
+
+```text
+pnpm -C web test
+pnpm -C web build
+cargo fmt --check
+git diff --check
+```
+
+Result: 70 files / 715 web tests passed; the production build completed. Vite emitted only the existing ineffective-dynamic-import and large-chunk warnings. Formatting and diff checks passed.
+
+## Real macOS application loop
+
+Application: `/Users/lvbaiqing/TRUE 开发/PRIMARY-CN/OpenTake-generation/target/debug/bundle/macos/OpenTake.app`.
+
+Project: `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`, 890 frames at 30 fps with the saved three-fragment linked A/V timeline and four captions.
+
+Observed in the real interface:
+
+1. `设置` opened the Settings overlay at `通用`; `完成` closed it and returned to the unchanged editor.
+2. `素材库` opened the global Library. `返回主页` reached Home; the `TalkingHeadQA` recent card was visible with the exact saved path, and double-click reopened the same 890-frame project.
+3. The direct `导出视频` control was enabled for the populated timeline, opened the video export dialog, and `取消` returned to the editor.
+4. `导出` opened the interchange menu with MP4, XMEML, FCPXML, OTIO, and EDL entries; Escape dismissed the menu.
+5. Reopening `导出` and selecting `渲染为视频（MP4）` closed the popup and opened the same video export dialog; `取消` returned to the editor.
+6. The previously validated `导出字幕` popup remained present and usable; its SRT/VTT native export evidence is recorded separately in `subtitle-export-real-device-2026-07-30.md`.
+
+The final accessibility tree still showed `TalkingHeadQA` at `00:29:20`, all six linked A/V clip fragments, and no modal or popup left open.
+
+## Result
+
+All seven controls in Task 13 are verified by exact owning tests and a real application round trip. This closes only the planned title-bar control slice; Home launcher controls, interchange file contents, and other shell surfaces remain independently tracked.
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diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/transition-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/transition-real-device-2026-07-31.md
new file mode 100644
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--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/transition-real-device-2026-07-31.md
@@ -0,0 +1,126 @@
+# Editable cross-dissolve packaged-app verification (2026-07-31)
+
+## Scope
+
+This record closes implementation-plan Task 7 (`MR-transitions`) for the first
+editable clip-to-clip transition vertical slice. It verifies the Rust product
+boundary first, then the rebuilt packaged macOS application against an isolated
+copy of a real 30 fps project.
+
+This is local functional evidence only. It is not Developer ID signing,
+notarization, or a Beta release claim.
+
+## Test-first implementation evidence
+
+- Owning test added at
+  `crates/opentake-render/tests/transitions.rs#adjacent_clip_transition_is_editable_undoable_and_matches_preview_export`.
+- Historical RED command:
+  `cargo test -p opentake-render --test transitions adjacent_clip_transition_is_editable_undoable_and_matches_preview_export -- --exact`
+- RED failure: the serialized transition did not contain
+  `"fromClipId":"a"`, proving the previous model did not persist both
+  adjacent clip identities.
+- The same exact command passed after implementation.
+- The owning test covers add/change/remove, undo/redo, save/reopen, explicit
+  rejection of an overlong transition without history mutation, and fresh GPU
+  preview/export equality at the cut, midpoint, last mixed frame, and end.
+- Its synthetic red-to-blue fixture also guards against midpoint darkening: the
+  midpoint is purple, not two half-transparent layers over black.
+
+## Code and build gates
+
+All commands completed successfully against the Task 7 working tree:
+
+- `npm test`: 89 test files, 807 tests passed.
+- `npm run build`: passed (existing non-blocking bundle-size warnings only).
+- Focused web tests for the transition tab, fallback command path, and timeline
+  overlay: 3 files, 29 tests passed.
+- `cargo fmt --all -- --check`: passed.
+- `cargo clippy --workspace --all-targets -- -D warnings`: passed. Cargo only
+  repeated the repository's existing future-incompatibility notice for
+  `block 0.1.6`.
+- `cargo test --workspace --no-fail-fast`: passed. Explicit real-device-only
+  tests remained ignored by design.
+- `web/node_modules/.bin/tauri build --bundles app --no-sign`: passed.
+
+The tested application was
+`target/release/bundle/macos/OpenTake.app`:
+
+- executable SHA-256:
+  `a0fd7fdc734909699eb3c54cba96018fa566b87cea8e14b5638fc72a23f10f54`
+- ad-hoc CDHash: `3325a88d8ac1bb1a7bfa777e64fc355fc9c34276`
+- `codesign --verify --deep --strict --verbose=2`: passed, including the bundled
+  `ffmpeg` and `ffprobe` helpers.
+- `Signature=adhoc`, `TeamIdentifier=not set`; therefore this proves local
+  bundle integrity only.
+
+## Packaged application workflow
+
+Fixture:
+`/private/tmp/opentake-transition-real-device-20260731.opentake`
+(isolated copy; source media remained external and unmodified).
+
+The packaged application completed the following workflow through its visible
+UI:
+
+1. Opened the fixture and selected the enabled **Transition** media tab.
+2. Loaded a legacy cross-dissolve that contained only `toClipId`; the UI showed
+   it correctly without corrupting the project.
+3. Removed the transition, undid the removal, redid it, then added it again.
+4. Changed its duration to 20 frames (0.67 seconds), applied it, and saved.
+5. Returned to Home, reopened the project from Recents, and confirmed the
+   20-frame transition persisted while the fresh session had no stale undo or
+   redo history.
+6. Started playback before the transition at frame 140. Playback advanced past
+   the cut at frame 151 and reached frame 919 (`00:30:19`), proving native
+   playback crossed the transition boundary without stalling or crashing.
+7. Returned exactly to frame 140 (`00:04:20`), captured the native preview, and
+   exported the complete timeline through the packaged application's export
+   dialog.
+
+The saved model contains both adjacent identities and the requested duration:
+
+```json
+{"id":"id-4","transitionOut":{"fromClipId":"id-4","toClipId":"c7e1e6d4-6be2-4844-a827-c4fa9e20d402","kind":"crossDissolve","durationFrames":20}}
+```
+
+- `project.json` SHA-256:
+  `e7e7d1aede80a0dd2c647ef5c13106aa1c27621c08011a3cc8e2b731d3e090f9`
+- post-capture `media.json` SHA-256:
+  `7df2035ed2a328495dabac49a9ec6801be971b1ed265153276f1a0ba7f98f981`
+
+## Preview/export parity
+
+The packaged application export probes as:
+
+- H.264 video, 1920 x 1080, 30/1 fps, 920 frames
+- AAC audio
+- duration `30.666667` seconds
+- file size `273566` bytes
+- SHA-256:
+  `132f00e123a805006da55e93cc7074ac2b78762eaebfd16e36a19ffe2065a0ee`
+
+Frame 140 was extracted from the complete export and compared with the native
+preview capture at the same timeline frame using the bundled FFmpeg:
+
+- SSIM: `0.997060` (`25.317063` dB)
+- PSNR average: `37.911328` dB
+- both frames: PNG, 1920 x 1080
+
+The small difference is the expected H.264 chroma/quantization loss; geometry,
+transition composition, and the active text overlay match visually.
+
+## Artifacts
+
+- `transition-packaged-ui-2026-07-31.png` — reopened packaged UI with the
+  persisted 20-frame transition.
+- `transition-preview-frame-140-2026-07-31.png` — native packaged preview.
+- `transition-export-2026-07-31.mp4` — complete packaged-app export.
+- `transition-export-frame-140-2026-07-31.png` — exact exported comparison
+  frame.
+
+## Result
+
+Task 7's first cross-dissolve vertical slice is verified through its owning
+tests, workspace gates, save/reopen behavior, undo/redo, packaged playback, and
+complete export. Additional wipe, slide, and 3D transition types remain future
+library expansion and are not part of this task's acceptance contract.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-contract-real-device-2026-07-31.md b/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-contract-real-device-2026-07-31.md
new file mode 100644
index 00000000..fb24bc5f
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-contract-real-device-2026-07-31.md
@@ -0,0 +1,118 @@
+# HS-menu-contract packaged macOS evidence — 2026-07-31
+
+## Scope
+
+- Plan: `home-shell-implementation.md`, Task 7 `HS-menu-contract`
+- App under test: `target/debug/bundle/macos/OpenTake.app`
+- Original project: `/private/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake`
+- Save-As fixture: `/private/tmp/Task7NativeSaveAs-20260731.opentake`
+- Host: macOS desktop package, exercised through the native accessibility tree
+
+This task covers both menu surfaces required by the source specification: the
+complete native application menu (App/File/Edit/View/Help) and the cross-platform
+in-app View menu. The two surfaces dispatch the same project, edit, media, and UI
+actions; native enabled/checked/text state is synchronized from the owning stores.
+
+## Code and package gates
+
+- True focused RED before implementation:
+  `pnpm -C web test --run src/components/shell/ViewMenu.test.tsx -t "commands_shortcuts_checked_state_and_disabled_rules"`
+  failed because the planned owning test file did not exist.
+- Focused GREEN after implementation: 1/1.
+- Save-As action regression: 20/20, including atomic success, failed-publication
+  rollback, and compatibility-read-only rejection.
+- Web regression: 73 files / 746 tests passed.
+- Web production build passed.
+- `cargo check -p opentake-tauri` passed.
+- `./web/node_modules/.bin/tauri build --debug` passed and produced the app and
+  debug DMG under `target/debug/bundle/`.
+- `cargo fmt --all -- --check` passed.
+- `cargo test --workspace` passed on the final run. The preceding run had one
+  three-second readiness timeout in the mocked generation-provider smoke test;
+  that exact test passed in isolation and the immediate full rerun also passed,
+  identifying a timing flake rather than a persistent product failure.
+- `git diff --check` passed.
+- Tauri capability validation includes only the additional
+  `core:window:allow-set-fullscreen` permission required by the command.
+
+The plan-prescribed focused command contains an extra `--`; Vitest interprets
+the trailing arguments as passthrough and runs the whole suite. It is retained
+for plan parity, while the true focused form above proves that the named test
+itself executed.
+
+## Native application menu matrix
+
+The packaged app exposed exactly five top-level groups and 32 specified entries:
+App 4, File 6, Edit 10, View 8, Help 4. Update, Tutorial, and Feedback are visible,
+explicitly labelled unavailable in Beta, and disabled rather than silently wired
+to nonexistent behavior.
+
+| Context / group | Packaged result |
+| --- | --- |
+| Home / File | New and Open enabled; Save, Save As, Import Media, and Export disabled. `⌘N` opened the native Save dialog and `⌘O` opened the native Open dialog; both were cancelled without side effects. |
+| Editor / File | All six entries enabled. Save As published the independent fixture atomically; it contains `project.json`, `media.json`, `thumbnail.jpg`, and the chat session. Its external media reference remained valid. Save then rewrote that fixture successfully. Import Media opened the native media picker and cancel restored the editor. Export opened the application export panel and cancel restored the editor. |
+| Home / Edit | All ten entries disabled. |
+| Editor / Edit, no selection | Undo/Redo, Cut/Copy/Paste, trims, and Delete disabled; Select All and Split enabled because the project contains clips. |
+| Editor / Edit, selection | Select All selected all ten timeline items; Cut, Copy, both trims, and Delete became enabled. Copy was non-mutating and enabled Paste. Escape cleared the selection and returned those commands to the disabled state. |
+| App | About, Settings, and Quit present; Check for Updates visible and disabled for Beta. Settings opened the General pane. Quit was not activated during verification. |
+| Help | Keyboard Shortcuts and MCP Instructions enabled; Tutorial and Send Feedback visible and disabled for Beta. Both enabled commands opened their exact Settings panes, including an accessible shortcut table. |
+| Runtime language | Switching Settings from Chinese to English immediately changed native group and item labels (`文件/编辑/视图/帮助` → `File/Edit/View/Help`) without restart; switching back restored Chinese. |
+
+The original `TalkingHeadQA.opentake` was never written by Save As. The app was
+restarted after fixture verification and the Home recent list showed both the
+original project and the new fixture, proving the canonical path changed only
+after successful publication.
+
+## View command matrix
+
+The in-app menu opened with keyboard focus on Media Panel. Every item exposed
+the specified accelerator and accessibility checked state. The same View entries
+were present and enabled in the native View menu, including the three-item Layout
+submenu.
+
+| Command | Pointer/native result | Shortcut result | Checked/result evidence |
+| --- | --- | --- | --- |
+| Media Panel | panel removed/restored through both in-app and native menus | `⌘0` removed it | state changed on → off → on |
+| Inspector | panel removed/restored | `⌘⌥0` removed it | state changed on → off |
+| Agent Panel | panel removed/restored | `⌘⌥A` removed it | title toggle and menu changed on → off |
+| Maximize Focused Panel | timeline expanded to the editor body | backquote expanded/restored it | state changed off → on |
+| Default Layout | default geometry restored | `⌘1` restored it | sole selected layout item |
+| Media Layout | media geometry applied | `⌘2` applied it | selected state moved to Media |
+| Vertical Layout | vertical geometry applied | `⌘3` applied it | selected state moved to Vertical |
+| Enter Full Screen | macOS window entered/exited fullscreen | `⌘F` entered/exited it | traffic-light controls disappeared/reappeared |
+
+Down moved focus from the first enabled command to Inspector; Home/End and arrow
+traversal are covered by the focused contract. Escape closed the menu, returned
+focus to its trigger, and did not leak to the editor-wide maximize handler.
+
+The focused contract also proves the defensive rule that Maximize Focused Panel
+is disabled when `focusedPanel === null`. Hiding a currently focused/maximized
+collapsible panel moves focus to timeline and clears maximize.
+
+## Defects found and corrected during packaged validation
+
+1. The first implementation covered only the in-app View popover, while the
+   requirement literally called for the complete application/main menu. The
+   native 32-entry menu, shared command router, store synchronization, Settings
+   deep links, and Save-As action were added before the task was classified.
+2. Escape originally reached both the menu dismissal handler and the global
+   editor handler, cancelling maximize. Capture-phase consumption now makes one
+   Escape perform one action.
+3. Fullscreen initially failed because Tauri's window capability allowed reads
+   but not writes. The exact set permission was added and failure now produces a
+   localized recovery toast.
+4. Native labels initially reflected only startup locale. Menu/submenu handles
+   now subscribe to the i18n store and update text immediately; packaged Chinese
+   → English → Chinese verification passed.
+5. Self-review found that the first synchronization pass would resend every
+   native label on unrelated high-frequency UI changes such as playhead motion.
+   State and locale synchronization are now separate and snapshot-deduplicated;
+   the rebuilt package retained immediate language switching.
+
+## Final state
+
+- Application returned to Home with Chinese restored.
+- Original and Save-As fixture both remained available in Recents.
+- No destructive edit command was executed against the original project.
+- Default layout, visible panels, non-maximized state, and non-fullscreen state
+  were restored before the final restart.
diff --git a/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-real-device-2026-07-30.md b/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-real-device-2026-07-30.md
new file mode 100644
index 00000000..5a4577b4
--- /dev/null
+++ b/docs/audit/2026-07-14/runtime-artifacts/automated/view-menu-real-device-2026-07-30.md
@@ -0,0 +1,25 @@
+# View menu control acceptance — 2026-07-30
+
+Scope: Home Shell Task 16 (`implementation-slice-4a4cd45e11211989`) on the rebuilt arm64 macOS application at `target/debug/bundle/macos/OpenTake.app`, with `/tmp/opentake-beta-qa-20260729/TalkingHeadQA.opentake` open.
+
+## Code verification
+
+- The specified owning runner did not exist. `pnpm -C web exec vitest run src/components/shell/ViewMenu.interaction.test.tsx` therefore produced the expected RED result: `No test files found, exiting with code 1`.
+- The plan's generated `pnpm -C web test -- --run ...` spelling was not used as focused evidence because Vitest treated the extra `--` as an argument boundary and ran the full suite. The direct Vitest spelling above is the verified focused command.
+- Added exactly five candidate-named interaction tests covering menu toggle/Escape/outside dismissal, preset selection and close, and Agent/Media/Inspector panel toggles with persisted state and checked-state assertions.
+- Focused result: 1 file, 5 tests passed.
+- Regression result: 71 files, 726 tests passed.
+- `pnpm -C web build` passed. Vite emitted only the existing dynamic-import and chunk-size warnings.
+
+## Real-device verification
+
+Computer Use exercised the packaged Tauri application through its accessibility surface:
+
+1. Opened `视图`; accessibility exposed a menu with `默认布局`, `媒体布局`, `竖屏布局`, `Agent 面板`, `媒体面板`, and `检查器`.
+2. Selected `媒体布局`; the menu closed, the layout changed, and reopening reported `媒体布局 Value: 1` with the other presets at `0`.
+3. Toggled Agent, Media, and Inspector while the menu stayed open. Each accessibility value changed from `1` to `0`, and the corresponding panel disappeared from the editor.
+4. Pressed Escape; the menu closed and the editor accessibility tree returned.
+5. Reopened the menu and clicked the preview outside it; the menu closed.
+6. Restored `默认布局` and all three panels to `Value: 1`, then dismissed the menu. The final packaged-app screenshot and accessibility tree showed the original Agent + Media + Preview + Inspector arrangement.
+
+Result: PASS. All five planned controls behaved correctly in component tests and in the packaged macOS app.
diff --git a/docs/modules/opentake-agent/INDEX.md b/docs/modules/opentake-agent/INDEX.md
index ca5dd0da..6aaa4690 100644
--- a/docs/modules/opentake-agent/INDEX.md
+++ b/docs/modules/opentake-agent/INDEX.md
@@ -44,7 +44,7 @@
 - [opentake-core](../opentake-core/INDEX.md) — `AppCore` 会话（`CoreHandle` 适配的权威真理）。
 - [opentake-media](../opentake-media/INDEX.md) — PCM 抽取 + 节拍/静音分析（分析驱动工具的后端）。
 - [opentake-gen](../opentake-gen/INDEX.md) — 生成模型静态目录（`list_models` 数据源）。
-- [opentake-motion](../opentake-motion/INDEX.md) — Motion Canvas（`add_motion_graphic` 计划接线目标，Issue #34）。
+- [opentake-motion](../opentake-motion/INDEX.md) — Motion Canvas 3.17.2 + 本地 fallback（`add_motion_graphic` / `edit_motion_graphic` 已接生产桥，Issue #34）。
 - [src-tauri](../src-tauri/INDEX.md) — 桌面壳：`src-tauri/src/mcp.rs` 构建注册表并启动 MCP server。
 
 ## 源码
diff --git a/docs/modules/opentake-agent/OVERVIEW.md b/docs/modules/opentake-agent/OVERVIEW.md
index 971fe887..e3c619ad 100644
--- a/docs/modules/opentake-agent/OVERVIEW.md
+++ b/docs/modules/opentake-agent/OVERVIEW.md
@@ -30,7 +30,7 @@ src-tauri         桌面壳：build_registry + server::serve 起 MCP（src-tauri
 
 **做什么**
 
-- 定义 **44 个工具**的名称 / 描述 / JSON Schema / 类型化参数（= 上游工具单一事实源）。
+- 定义 **45 个兼容工具**的名称 / 描述 / JSON Schema / 类型化参数（= 上游工具单一事实源）。
 - 一条统一派发管线包裹**每个**工具：解析名 → 快照 → 展开短 id → 解码（精确路径错误）→ 跑 body → 附 Context Signal → 缩短 id。
 - 把编辑类工具归一到 `opentake-ops::EditCommand`，经 `CoreHandle` 应用到权威 `AppCore`。
 - 起 rmcp MCP server（回环绑定 + Origin/Host 守卫 + OAuth well-known）。
@@ -50,7 +50,7 @@ src-tauri         桌面壳：build_registry + server::serve 起 MCP（src-tauri
 
 ### 1. MCP server（网络面）
 
-rmcp 的 `StreamableHttpService` 挂在 `/mcp`，默认绑 `127.0.0.1:19789`（`server::DEFAULT_ADDR`）。axum 路由外层套一个 **loopback 守卫**：`Host` / `Origin` 头若存在且非 `localhost`/`127.0.0.1`/`::1` 一律 403（DNS-rebinding 防御；头缺省放行，原生 MCP 客户端常不带 `Origin`）。另暴露 `/.well-known/oauth-protected-resource` 明确"无需鉴权"。`get_info` 广告系统提示 + tools 能力，`list_tools` 返回 44 个工具 schema，`call_tool` 经 `spawn_blocking` 派发。详见 [mcp-server.md](mcp-server.md)。
+rmcp 的 `StreamableHttpService` 挂在 `/mcp`，默认绑 `127.0.0.1:19789`（`server::DEFAULT_ADDR`）。axum 路由外层套一个 **loopback 守卫**：`Host` / `Origin` 头若存在且非 `localhost`/`127.0.0.1`/`::1` 一律 403（DNS-rebinding 防御；头缺省放行，原生 MCP 客户端常不带 `Origin`）。另暴露 `/.well-known/oauth-protected-resource` 明确"无需鉴权"。`get_info` 广告系统提示 + tools 能力，`list_tools` 按媒体桥、生成授权和后端能力返回当前可执行 schema，`call_tool` 经 `spawn_blocking` 派发。详见 [mcp-server.md](mcp-server.md)。
 
 ### 2. 工具派发层（归一到 EditCommand）
 
@@ -108,11 +108,11 @@ MCP 客户端 → /mcp (loopback 守卫) → McpServer::call_tool
 
 ### 已实现
 
-- **44 工具的名称 / 描述 / Schema / 类型化参数**（`tools/`，描述逐字移植）。
+- **45 个兼容工具的名称 / 描述 / Schema / 类型化参数**（`tools/`，未就绪能力按主机会话 fail-closed 隐藏）。
 - **统一派发管线**全链路（解析 → 快照 → 短 id 展开 → 解码 → body → 信号 → 短 id 缩短）。
 - 编辑类工具接线到 `EditCommand`：`add_clips` / `insert_clips` / `move_clips` / `remove_clips` / `remove_tracks` / `split_clip` / `set_keyframes` / `ripple_delete_ranges` / `add_texts` / `set_clip_properties` / `create_folder` / `move_to_folder` / `rename_media` / `rename_folder` / `delete_media` / `delete_folder` / `undo`，以及 A-tier 效果 `set_color_grade` / `chroma_key` / `set_mask` / `apply_effect`。
 - 读类工具：`get_timeline`（紧凑编码）/ `get_media` / `list_folders` / `list_models`（读 `opentake-gen` 静态目录，纯本地）。
-- 分析驱动工具：`detect_beats` / `auto_cut_to_beats` / `tighten_silences`（经 `CoreHandle::extract_analysis_pcm` + `opentake-media` 分析，**返回预览/建议，不直接落地**——`applied:false`，由模型再调编辑工具落地）。
+- 分析驱动工具：`detect_beats` / `auto_cut_to_beats` / `tighten_silences` / `remove_filler_words`（PCM 或词级转写分析，**返回预览/建议，不直接落地**——`applied:false`，由模型审阅后再调编辑工具落地）。
 - **MCP server**：rmcp Streamable-HTTP + loopback 守卫 + OAuth well-known + `serve()`，已被 `src-tauri/src/mcp.rs` 集成启动。
 - **Context Signal**：视频类型自动判定 / 轨道角色检测 + 逐轨建议 / 剪辑阶段推断 + 阶段指引 / 内置规则告警 + 插件规则。
 - **工作流插件**：JSON 模型 + 注册表（扫描/校验/激活）+ 内置 `audio-first` + 三个工作流工具（`list_workflows` / `activate_workflow` / `deactivate_workflow`）。
@@ -122,17 +122,17 @@ MCP 客户端 → /mcp (loopback 守卫) → McpServer::call_tool
 ### 计划中 / 隐藏能力（如实标注）
 
 - `inspect_media` / `get_transcript` / `inspect_timeline` / `search_media` / `import_media` / `add_captions` 已接真实桌面媒体桥；`inspect_media` 的 Lottie 分支仍返回明确不支持。
-- `generate_video` / `generate_image` / `generate_audio` / `upscale_media`（异步 GenClient + BYOK）及 `add_motion_graphic` / `edit_motion_graphic`（Motion Canvas）仅保留于 `ToolName::KNOWN`，不进入 MCP/Chat 发现面或系统提示。
+- `generate_video` / `generate_image` / `generate_audio` / `upscale_media` 在存在兼容托管或 BYOK 授权时动态进入 MCP/Chat 发现面；`add_motion_graphic` / `edit_motion_graphic` 在桌面 Chromium + FFmpeg 可用时动态进入发现面，并共享 Motion Panel 的确定性渲染、原子导入/落轨/替换与撤销路径。
 - `smart_reframe`：返回结构化不可用原因（需视觉/显著性分析后端）。
-- `get_timeline` 的 `canGenerate` 恒为 `false`（生成后端未接线，让模型不会提议生成）。
+- `get_timeline` 的 `canGenerate` 来自当前生成桥可用授权与 provider/model 能力，不再是常量。
 - `create_folder` / `move_to_folder` 的批量 `entries` 形式未接线（仅单条形式）。
 - **应用内聊天客户端**（`AgentService` 等价的 SSE 工具循环、BYOK Anthropic 直连）尚未落地。
 
-## 工具总数：**38 个发现面工具 / 44 个兼容线名**
+## 工具总数：**最多 39 个基础工具（主机能力过滤）+ 4 个动态生成工具 + 2 个动态 Motion 工具 / 45 个兼容线名**
 
-源：`crates/opentake-agent/src/tools/names.rs` 的 `ALL`（38）/ `KNOWN`（44）/ `UPSTREAM`（31）常量。
+源：`crates/opentake-agent/src/tools/names.rs` 的 `ALL`（39）/ `GENERATION`（4）/ `KNOWN`（45）/ `UPSTREAM`（31）常量。
 
-13 个扩展 = 分析驱动 4（`detect_beats` / `auto_cut_to_beats` / `smart_reframe` / `tighten_silences`）+ 工作流插件 3（`activate_workflow` / `list_workflows` / `deactivate_workflow`）+ A-tier 着色效果 4（`set_color_grade` / `chroma_key` / `set_mask` / `apply_effect`）+ Motion Canvas 2（`add_motion_graphic` / `edit_motion_graphic`）。
+14 个扩展 = 分析驱动 5（`detect_beats` / `auto_cut_to_beats` / `smart_reframe` / `tighten_silences` / `remove_filler_words`）+ 工作流插件 3（`activate_workflow` / `list_workflows` / `deactivate_workflow`）+ A-tier 着色效果 4（`set_color_grade` / `chroma_key` / `set_mask` / `apply_effect`）+ Motion Canvas 2（`add_motion_graphic` / `edit_motion_graphic`）。
 
 ---
 
diff --git a/docs/modules/opentake-agent/SPEC.md b/docs/modules/opentake-agent/SPEC.md
index 08c040bc..560cae52 100644
--- a/docs/modules/opentake-agent/SPEC.md
+++ b/docs/modules/opentake-agent/SPEC.md
@@ -156,7 +156,7 @@ capabilities: { resources: { subscribe:false, listChanged:false },
 
 枚举顺序严格按 `ToolName`（`ToolDefinitions.swift:4-36`）：`get_timeline, get_media, add_clips, insert_clips, remove_clips, remove_tracks, move_clips, set_clip_properties, set_keyframes, split_clip, ripple_delete_ranges, undo, add_texts, add_captions, generate_video, generate_image, generate_audio, upscale_media, import_media, list_models, inspect_media, get_transcript, inspect_timeline, search_media, list_folders, create_folder, move_to_folder, rename_media, rename_folder, delete_media, delete_folder`。
 
-> OpenTake 生产发现面按能力动态组成：基础 38 个真实路径工具始终可见；托管凭据或 fal/Replicate/OpenAI/ElevenLabs 兼容 BYOK 可用时再发布四个生成工具。四个工具都要求调用方传 `costAuthorized:true`，MCP 与应用内 Chat 共用同一 GenerationBridge；无凭据时 `get_timeline.canGenerate=false` 且工具不进入目录/系统提示。
+> OpenTake 生产发现面按能力动态组成：基础集合最多 39 个真实路径工具，其中七个媒体/转写工具要求主机注入 `MediaBridge`；托管凭据或 fal/Replicate/OpenAI/ElevenLabs 兼容 BYOK 可用时再发布四个生成工具。四个生成工具都要求调用方传 `costAuthorized:true`，MCP 与应用内 Chat 共用同一 GenerationBridge；无凭据时 `get_timeline.canGenerate=false` 且工具不进入目录/系统提示。
 
 #### A. 读 / 内省（只读，7 个）
 
@@ -1074,7 +1074,7 @@ src/
 
 **OpenTake 增强（ARCHITECTURE §7 `:154`，可后置）**
 16. [ ] 系统提示词分层化 + 模型策略从 `opentake-gen` 配置注入（§6.5.1）。
-17. [ ] 高阶工具 `remove_filler_words` / `tighten_silences`（把易错帧算术在 Rust 内一次完成）。
+17. [x] 高阶工具 `remove_filler_words` / `tighten_silences`（返回可审阅项目帧区间与原子 `ripple_delete_ranges` 命令；完整实机保存/重开/导出验收仍由审计计划跟踪）。
 18. [ ] 写工具统一返回结构化 JSON（§4.4 增强）。
 19. [ ] `get_capabilities`（一次性返回 ASR/视觉索引/生成/编解码就绪状态）。
 
diff --git a/docs/modules/opentake-agent/dispatch-tools.md b/docs/modules/opentake-agent/dispatch-tools.md
index e6500d44..64b4f92d 100644
--- a/docs/modules/opentake-agent/dispatch-tools.md
+++ b/docs/modules/opentake-agent/dispatch-tools.md
@@ -33,29 +33,30 @@
 - `apply(cmd)` → `apply_raw` 调 `handle.apply`；若 `res.changed`，把 `action_name` 压入 agent-undo 栈。
 - `undo()` 只在栈非空（即本会话 Agent 真改过）时弹栈并 `apply_raw(EditCommand::Undo)`；否则 `"undo: no agent edits to revert"`。这保护用户的手动编辑不被 Agent 撤销（照搬上游 `agentUndoStack` 守卫）。
 
-### body 分类（38 个发现面工具；44 个兼容线名）
+### body 分类（最多 39 个基础工具；45 个兼容线名）
 
 - **读类（序列化状态/媒体桥）**：`get_timeline`、`get_media`、`list_folders`、`list_models`、`inspect_media`、`get_transcript`、`inspect_timeline`、`search_media`。
 - **编辑类（→ EditCommand → CoreHandle::apply）**：`add_clips`（含 `AddClipsAutoTrack` 自动建轨）、`insert_clips`、`move_clips`、`remove_clips`、`remove_tracks`、`split_clip`、`set_keyframes`、`ripple_delete_ranges`、`add_texts`、`set_clip_properties`、`create_folder`、`move_to_folder`、`rename_media`、`rename_folder`、`delete_media`、`delete_folder`、`set_color_grade`、`chroma_key`、`set_mask`、`apply_effect`、`undo`。
 - **工作流插件类**：`list_workflows` / `activate_workflow` / `deactivate_workflow`（操作 `PluginRegistry`，激活时回发插件 `instructions.md`）。
-- **分析驱动类（预览/建议，`applied:false`）**：`detect_beats` / `auto_cut_to_beats` / `tighten_silences`。经 `CoreHandle::extract_analysis_pcm` 抽 16k 单声道 PCM，调 `opentake-media` 的 `detect_beats` / `detect_silences`，把结果折算回项目帧后**返回建议**（节拍帧 / 切点 / 待执行的 `ripple_delete_ranges` 命令列表），由模型再调编辑工具落地——不直接改时间线。
+- **分析驱动类（预览/建议，`applied:false`）**：`detect_beats` / `auto_cut_to_beats` / `tighten_silences` / `remove_filler_words`。前三者经 `CoreHandle::extract_analysis_pcm` 抽 16k 单声道 PCM；`remove_filler_words` 经真实媒体桥读取词级项目帧转写，匹配可配置多词语气词表。四者都返回待审阅建议/`ripple_delete_ranges` 命令，不直接改时间线。
 - **桌面媒体桥**：`inspect_media`、`get_transcript`、`inspect_timeline`、`search_media`、`import_media`、`add_captions` 执行真实 Tauri/媒体路径；`inspect_media` 的 Lottie 分支返回明确不支持。
 - **结构化不可用**：`smart_reframe`（需视觉/显著性后端）。
-- **发现面外兼容线名**：`generate_video`、`generate_image`、`generate_audio`、`upscale_media`、`add_motion_graphic`、`edit_motion_graphic` 保留 schema/严格解码覆盖，但不在生产目录和系统提示中出现。
+- **动态生成类**：存在兼容托管或 BYOK 凭据时，`generate_video`、`generate_image`、`generate_audio`、`upscale_media` 进入发现面并走持久化任务、进度/取消/重试/结果导入链路；无可用授权时不发布。
+- **动态 Motion 类**：`add_motion_graphic`、`edit_motion_graphic` 在主机存在生产 Motion 桥时进入目录，执行 Motion Canvas/本地 fallback 渲染、验证、原子导入/落轨或替换；无能力主机 fail-closed 隐藏。
 
 帧/秒折算、`speed` 归一、`source↔timeline` 帧映射等纯数学集中在本文件的自由函数（如 `source_seconds_to_timeline_frame_clamped`），遵循移植铁律的取整方向。
 
 ## 工具层文件（`tools/`）
 
-### names.rs：44 工具枚举
+### names.rs：45 工具枚举
 
 `ToolName` 枚举 + `as_str()`（线名，与上游/规格逐字一致）+ `FromStr`。三个常量：
 
-- **`ALL: [ToolName; 38]`** — 当前发现面工具，注册顺序。
-- **`KNOWN: [ToolName; 44]`** — 含尚未发布能力的全部兼容线名。
+- **`ALL: [ToolName; 39]`** — 最大基础发现面，注册顺序；其中 7 个媒体桥工具按主机能力 fail-closed 过滤。
+- **`KNOWN: [ToolName; 45]`** — 含动态生成与尚未发布 Motion 能力的全部兼容线名。
 - **`UPSTREAM: [ToolName; 31]`** — 上游对齐子集（Issue #9 的"31 工具"）。
 
-13 个 OpenTake 扩展由分析驱动 4 + 工作流 3 + A-tier 效果 4 + Motion Canvas 2 组成；Motion 2 当前仅在 `KNOWN`（详见 [总览](OVERVIEW.md)）。
+14 个 OpenTake 扩展由分析驱动 5 + 工作流 3 + A-tier 效果 4 + Motion Canvas 2 组成；Motion 2 由具备生产渲染桥的主机动态追加（详见 [总览](OVERVIEW.md)）。
 
 ### args.rs：类型化参数
 
@@ -96,7 +97,7 @@ token 友好的时间线表示（1:1 上游 `ToolExecutor+Timeline.swift`）：
 ## 完成状态
 
 - 已实现：完整八步管线、21 类编辑/读工具接线、3 分析工具（预览式）、3 工作流工具、agent-undo 栈、工具层全文件。
-- 计划中：12 个 honest stub（媒体读 / 生成 / 导入 / 字幕 / Motion Canvas）+ `smart_reframe` 报错 + `create_folder`/`move_to_folder` 批量形式 + `get_timeline` 的 `canGenerate` 恒 `false`。详见 [总览](OVERVIEW.md) 完成状态。
+- 剩余能力缺口：`inspect_media` 的 Lottie 分支、`smart_reframe` 视觉后端，以及 `create_folder`/`move_to_folder` 的批量形式。生成、导入、字幕与 Motion 路径已由实时能力门控并接生产实现。详见 [总览](OVERVIEW.md) 完成状态。
 
 ---
 
diff --git a/docs/modules/opentake-agent/mcp-server.md b/docs/modules/opentake-agent/mcp-server.md
index cfddfb76..9bf70672 100644
--- a/docs/modules/opentake-agent/mcp-server.md
+++ b/docs/modules/opentake-agent/mcp-server.md
@@ -17,7 +17,7 @@
 `McpServer` 实现 rmcp 的 `ServerHandler`，持有一个 `Arc<Dispatcher>`（自带会话级 agent-undo 栈）+ 构造时快照的系统提示 `instructions`。
 
 - **`get_info`** — 广告 `instructions`（base 提示 + 激活插件，构造时由 [`assemble_system_prompt`](prompt.md) 生成）与 tools 能力；`server_info.name = "opentake"`，版本取 `CARGO_PKG_VERSION`。
-- **`list_tools`** — 返回当前 38 个真实路径工具 schema（`ToolName::ALL`，描述/Schema 来自 [`tools::descriptions`](dispatch-tools.md)）。其余 6 个兼容线名在后端完成前仅保留于 `ToolName::KNOWN`，不进入发现面。
+- **`list_tools`** — 从最多 39 个基础工具（`ToolName::ALL`）按当前主机的媒体桥能力过滤，在授权可用时追加 4 个生成工具，并在桌面 Motion 渲染桥可用时追加 add/edit 两工具；描述/Schema 来自 [`tools::descriptions`](dispatch-tools.md)。
 - **`call_tool`** — 把工具调用交给 `Dispatcher::dispatch`。因为所有已接线工具是同步的，用 `tokio::task::spawn_blocking` 在阻塞线程池跑，避免堵住 async 运行时；结果经 [`convert::to_call_tool_result`](core-handle-convert.md) 转成 rmcp `CallToolResult`。
 - **`call`** — 与 `call_tool` 等价的同步入口，单独拆出以便**不构造传输 `RequestContext`** 就能单测一次工具派发。
 
diff --git a/docs/modules/opentake-domain/OVERVIEW.md b/docs/modules/opentake-domain/OVERVIEW.md
index 30aa51cc..ed19b59b 100644
--- a/docs/modules/opentake-domain/OVERVIEW.md
+++ b/docs/modules/opentake-domain/OVERVIEW.md
@@ -80,7 +80,7 @@ opentake-core / src-tauri / web
 **计划中 / 部分（本 crate 仅占其一环，余下在上层）：**
 - `TextLayout::natural_size` 是**近似实现**：用固定字符步进估算宽度，复刻了 canvas-scale 基准（`canvas_height/1080`）、阴影 padding（`12*2`）与 `+4` 余量的**公式形状**，但**宽度不与上游 CoreText 像素一致**，必须由 render 层文本引擎（cosmic-text）重算以求像素对齐（见 `MODULE-PORT-MAP.md` 文字度量 needs-replacement）。
 - Context Signal 的**检测/填充**逻辑不在本 crate（Phase B–D，落在 agent 层）；domain 只定义形状 + serde。
-- `Effect` 是稳定的序列化契约，**具体特效**（blur/glow/sharpen…）的 WGSL pass 在 render 层增量实现。
+- `Effect` 保持稳定的字符串键序列化契约，但编辑和渲染边界会按闭合注册表校验。首批 `grayscale` / `sepia` / `invert` 均接受可选 `amount`（0–1，默认 1），并在预览与导出共用的 WGSL 顺序链中真实执行；未知名称或参数会明确报错。
 - 调色/抠像/蒙版的 domain 值与参考数学已就位，但**着色器接入、command（`SetColorGrade`/`SetChromaKey`/`SetMask`/`SetEffects`）与 UI** 属 ROADMAP Phase 3/A 层后续。
 
 ## 适用的移植铁律
diff --git a/docs/modules/opentake-gen/client-transport.md b/docs/modules/opentake-gen/client-transport.md
index ffe39c70..1b9c4a50 100644
--- a/docs/modules/opentake-gen/client-transport.md
+++ b/docs/modules/opentake-gen/client-transport.md
@@ -89,9 +89,17 @@ build_params(GenerationInput, uploaded)        # params 子系统装配载荷
 ## 完成状态
 
 - **已实现**：`GenClient` 双模调用面（list_models/submit/get/watch/sign_upload/upload_reference）、`watch` 终态轮询、`can_generate`、`HttpTransport` + 生产/Mock 实现、`GenerationJob` 状态机与终态校验、`GenError` 全套错误归类——均有离线单测（托管 + BYOK 两侧）。
+- **2026-08-01 Job 兼容性复核 PASS**：`GenerationJob` 同时接受 proxy
+  `id` 与上游 `_id`；旧载荷缺失 `resultUrls`、`errorMessage`、
+  `costCredits`、`completedAt` 时均稳定解码为 `None`。两个精确拥有者测试与
+  `opentake-gen` 全包测试通过。
+- **生成接线已完成**：桌面 `GenerationBridge` 已把
+  `generate_video`、`generate_image`、`generate_audio`、`upscale_media`
+  接到配置后的托管/BYOK provider，并以授权与模型能力动态发布工具；离线
+  mock-provider 测试覆盖成功、失败、取消、恢复与持久化。Motion 工具仍保持
+  隐藏，直到独立的动效物化切片完成。
 - **计划中 / 未接线**：
   - **托管 proxy 本身未实现**（`opentake-gen-proxy` 是 Phase 9 自建后端目标，含 `/v1/models`、`/v1/generations`、`/v1/uploads/sign`、SSE `/stream`、对象存储预签名、可选积分计费；SPEC §3）。`GenClient` 客户端侧已就绪，等服务端。
-  - **`generate_*` / `upscale_media` 尚未走通 `GenClient`**：`opentake-agent` 的 dispatch 层这四个工具仍是诚实存根（`"...: not yet implemented"`），原因明确写在代码注释——「需要 async GenClient + BYOK auth」。`list_models` 已接（见 [catalog.md](catalog.md)）。需要 async + ProviderRegistry 装配 + [BYOK key 注入](keys-byok.md)（ROADMAP Phase 8/9）。
   - `watch` 的流式 `/v1/generations/:id/stream`（SSE）目前只在客户端以轮询表达；proxy SSE 端点待建。
 
 ## 源码
diff --git a/docs/modules/opentake-media/OVERVIEW.md b/docs/modules/opentake-media/OVERVIEW.md
index 6230209f..4c65a3a3 100644
--- a/docs/modules/opentake-media/OVERVIEW.md
+++ b/docs/modules/opentake-media/OVERVIEW.md
@@ -52,7 +52,7 @@ opentake-core / src-tauri / opentake-agent / opentake-render   调用方
 ## 3. 关键概念与数据流
 
 ### FFmpeg sidecar 编解码（与 SPEC 的关键实现偏差）
-**实现走 `ffmpeg` / `ffprobe` 命令行二进制（ffmpeg-sidecar），不链接 `libav*`。** 原因：本机工具链为 ffmpeg 8.1（libavcodec 62），C 绑定 crate（`ffmpeg-next` / `ffmpeg-the-third`）不支持，且 `pkg-config` 缺失。`ff.rs` 封装二进制发现与一次性 ffprobe JSON 查询，上层解码模块用裸 stdin/stdout 管道交换原始像素/PCM。这与多处架构文档（[ARCHITECTURE.md](../../architecture/ARCHITECTURE.md) §1、[ROADMAP.md](../../architecture/ROADMAP.md) Phase 2、本模块 [SPEC.md](SPEC.md) §1.2 仍写 `ffmpeg-next`）存在偏差——以代码为准，详见 [probe-ff.md](probe-ff.md)。
+**实现走 `ffmpeg` / `ffprobe` 命令行二进制（ffmpeg-sidecar），不链接 `libav*`。** 原因：本机工具链为 ffmpeg 8.1（libavcodec 62），C 绑定 crate（`ffmpeg-next` / `ffmpeg-the-third`）不支持，且 `pkg-config` 缺失。`ff.rs` 封装二进制发现与一次性 ffprobe JSON 查询，上层解码模块用裸 stdin/stdout 管道交换原始像素/PCM。路径优先级为显式 `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE`、应用可执行文件旁的非符号链接常规文件、开发环境 `PATH`。与多处仍写 `ffmpeg-next` 的历史架构文档相比，以这个已测试的 CLI 边界为准，详见 [probe-ff.md](probe-ff.md)。
 
 ### 缩略图 / 波形 / 转写 / 语义搜索的总体管线
 
diff --git a/docs/modules/opentake-media/SPEC.md b/docs/modules/opentake-media/SPEC.md
index bd55c618..36b6f8b7 100644
--- a/docs/modules/opentake-media/SPEC.md
+++ b/docs/modules/opentake-media/SPEC.md
@@ -776,7 +776,7 @@ impl OrtModel {
     pub fn run(&self, inputs: &[(&str, TensorRef<'_>)]) -> Result<HashMap<String, OwnedTensor>>;
 }
 
-pub enum ExecutionProvider { Cpu, CoreML, Cuda, DirectMl, Tensorrt } // 按平台可用性回退到 Cpu
+pub enum ExecutionProvider { Cpu, CoreML, Cuda, DirectMl, Tensorrt } // Windows 使用纯 Rust tract Cpu；其他平台按可用性回退 Cpu
 ```
 
 ### 7.2 worker(序列化 GPU/重负载,导出期让路)
@@ -792,7 +792,7 @@ impl OrtWorker {
 pub struct OrtModelRegistry { /* 按 key 懒加载并缓存 OrtModel,避免重复 load */ }
 ```
 - **张量辅助**(`ort_worker/tensor.rs`):`ndarray ↔ ort::Value`、NCHW/NHWC 转换、mean/std 归一、`Array4<f32>` ↔ 图像。SigLIP 预处理(§5.2)即复用这里。
-- **EP 回退**:首选平台 EP(CoreML/CUDA/DirectML),不可用回退 CPU,日志 `tracing::warn`。
+- **EP 回退**:macOS 首选 CoreML；Linux 使用 CPU；Windows 使用不依赖原生 DLL 的纯 Rust tract CPU 后端。
 - **复用点**:`OrtEmbedder`(§5.7)内部即一个 `OrtModel`(image)+ 一个 `OrtModel`(text);进阶特性各自定义自己的预处理/后处理,共用 `OrtModel::run` + `OrtWorker` 调度。
 
 > 本 crate 只交付**框架 + SigLIP2 使用者**;具体进阶模型(Real-ESRGAN 等)在各自 Phase 8+ PR 落地,复用本接口。记此以明确「worker 通用接口」的交付边界 = §7.1/§7.2 + 至少一个真实使用者(SigLIP2)。
diff --git a/docs/modules/opentake-media/probe-ff.md b/docs/modules/opentake-media/probe-ff.md
index 676b2a82..6f9b8961 100644
--- a/docs/modules/opentake-media/probe-ff.md
+++ b/docs/modules/opentake-media/probe-ff.md
@@ -14,7 +14,7 @@
 
 ## 关键决策：为何 CLI sidecar 而非 libav 绑定
 
-`ff.rs` 模块注释明确：**有意不链接 `libav*`**。本机工具链是 ffmpeg 8.1（libavcodec 62），C 绑定 crate（`ffmpeg-next` / `ffmpeg-the-third`）不支持该版本，且 `pkg-config` 缺失。改用 `ffmpeg-sidecar`：shell 出 `PATH` 上的二进制，零原生链接、跨平台干净构建。
+`ff.rs` 模块注释明确：**有意不链接 `libav*`**。本机工具链是 ffmpeg 8.1（libavcodec 62），C 绑定 crate（`ffmpeg-next` / `ffmpeg-the-third`）不支持该版本，且 `pkg-config` 缺失。改用 `ffmpeg-sidecar`：显式环境覆盖优先，其次选择应用可执行文件旁的常规非符号链接 sidecar，开发构建最后回退 `PATH`；零 libav 原生链接。
 
 > ⚠️ **与文档的偏差**：[SPEC.md](SPEC.md) §1.2、[ARCHITECTURE.md](../../architecture/ARCHITECTURE.md) §1、[ROADMAP.md](../../architecture/ROADMAP.md) 都仍写 `ffmpeg-next`（libav 绑定）。**以代码为准**——实际全栈走 CLI sidecar。这影响所有解码路径：帧用裸 stdin/stdout 原始像素管道交换，而非内存中的 `AVFrame`。
 
@@ -24,7 +24,7 @@
 
 | 函数 | 作用 |
 |---|---|
-| `ffmpeg_path()` / `ffprobe_path()` | 返回二进制路径：优先环境变量 `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE`，否则 `PATH` 上的 `ffmpeg` / `ffprobe`。打包构建可指向 bundled 二进制（与 `src-tauri/src/lib.rs` 一致）。 |
+| `ffmpeg_path()` / `ffprobe_path()` | 返回二进制路径：优先环境变量 `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE`，其次应用可执行文件旁的常规非符号链接 sidecar，最后回退 `PATH` 上的 `ffmpeg` / `ffprobe`。纯 `resolve_cli_path` 测试覆盖优先级而不修改并行测试的全局环境。 |
 | `ffmpeg()` | 构造绑定到 `ffmpeg_path()` 的 `FfmpegCommand`。 |
 | `ffmpeg_available()` / `ffprobe_available()` | `-version` 是否退出 0。集成测试用它在无 ffmpeg 的机器上 skip，保证默认测试运行绿。经 `lib.rs::ffmpeg_status` 重导出供宿主能力检查。 |
 | `ffprobe_json(path)` | 运行 `ffprobe -v quiet -of json -show_streams -show_format <path>`，返回解析后的 `serde_json::Value`。**零解码**，仅读头/流参数。spawn 失败或非零退出 → `MediaError::Ffmpeg`。 |
@@ -62,6 +62,13 @@ pub fn parse_probe(json: &serde_json::Value) -> MediaProbe; // 纯函数，可
 ### 测试
 `parse_probe` 有约 12 条 fixture 单测：横屏不交换、tags 旋转 90 交换、side-data −90 折叠为 270 交换、180 不交换、fps 回退 `r_frame_rate`、纯音频无视频尺寸、时长回退容器、全空为 0、视频带音轨双标记、0 声道音轨不计音频、多声道计音频。
 
+2026-08-01 后续合规复核：Apple Silicon 的 FFmpeg/ffprobe 已替换为双哈希
+锁定的 7.0 GPL 构建；两者均不含 `--enable-nonfree`，`-L` 也不再报告不可
+再分发。供应脚本会在下载解包后、替换目标前检查版本、二进制摘要、configure
+flags 与许可输出。媒体 crate 的真实探测、解码、PCM、缩略图、波形、H.264、
+H.265 与 ProRes 往返均在这对二进制上通过。旧 6.0 包证据保留为历史记录，
+替换证据见 [`ffmpeg-license-replacement-2026-08-01.md`](../../audit/2026-07-14/runtime-artifacts/automated/ffmpeg-license-replacement-2026-08-01.md)。
+
 ---
 
 ## 页脚
diff --git a/docs/modules/opentake-media/semantic-search.md b/docs/modules/opentake-media/semantic-search.md
index 01b4a0f7..4a4e730b 100644
--- a/docs/modules/opentake-media/semantic-search.md
+++ b/docs/modules/opentake-media/semantic-search.md
@@ -149,7 +149,7 @@ pub fn rank(query: &[f32], indexes, limit, relative_cutoff, min_score) -> Vec<Hi
 
 ## 通用推理面 `ort_worker/`
 
-- `mod.rs`：`ExecutionProvider`（Cpu/CoreML/Cuda/DirectMl/TensorRt，`platform_default()` 按平台选 CoreML/DirectMl/Cpu）+ `IoTensor`/`IoSpec`（输入输出张量描述）+ `OrtModel`（`Session` 的 Mutex 包装，feature `ort-backend`）。
+- `mod.rs`：`ExecutionProvider`（Cpu/CoreML/Cuda/DirectMl/TensorRt，`platform_default()` 在 macOS 选 CoreML、Windows/Linux 选 CPU；Windows 由纯 Rust tract 执行）+ `IoTensor`/`IoSpec`（输入输出张量描述）+ `OrtModel`（`Session` 的 Mutex 包装，feature `ort-backend`）。
 - `tensor.rs`：`frame_to_hwc`（RGBA→HWC f32 [0,1] 丢 alpha）、`hwc_to_nchw_normalized`（按 mean/std 归一）、`mean_pool`（token 级输出平均）。
 - 用途：SigLIP2 与后续超分/抠像/追踪/补帧的统一 ONNX 推理通道（[ADVANCED-FEATURES.md](../../architecture/ADVANCED-FEATURES.md) §B/§54）。
 
diff --git a/docs/modules/opentake-motion/INDEX.md b/docs/modules/opentake-motion/INDEX.md
index 06f7ad7e..618b2ef5 100644
--- a/docs/modules/opentake-motion/INDEX.md
+++ b/docs/modules/opentake-motion/INDEX.md
@@ -3,18 +3,18 @@
 > 上级：[模块文档树](../INDEX.md) · [docs 总目录](../../INDEX.md)
 >
 > `opentake-motion` = **原生 web 动态图形 fallback 渲染原语层**：把内联 HTML/CSS/JS（或模板 + 参数）确定性逐帧栅格化为磁盘 RGBA PNG 帧序列、内容寻址缓存、安全沙箱，并适配成 `opentake-render` 的 clip source。
-> ⚠️ **当前是脚手架 / fallback**：动效 / AI Video 的 **v1 主路径走外部 Motion Canvas 插件**（产 `mp4` 按普通视频导入；插件目录 `plugins/motion-canvas-studio/` **尚未存在**）。本 crate 保留给后续透明 alpha overlay / frame-sequence / HTML-CSS fallback。**不是 Lottie 渲染器**（Lottie 在 [opentake-render](../opentake-render/INDEX.md)）。
-> 依赖只向下：依赖 `opentake-render`（实现其 source 契约）+ `opentake-domain`；设计上由 `opentake-core`/`src-tauri`/`opentake-agent` 调用（**v1 未接线**）。真实 headless-Chromium 后端在 `chromium` feature 后，**默认 build/CI 离线、不需浏览器**。
+> **Beta v1 已接入桌面**：`plugins/motion-canvas-studio/` 锁定 Motion Canvas 3.17.2，`title-card` 通过官方逐帧 renderer 产帧并编码 `mp4`；本 crate 的离线 Chromium 宿主也承载本地 HTML/CSS fallback。两条路径经 Tauri/Core/Agent/UI 共用的原子导入落轨流程进入普通视频预览与导出。**不是 Lottie 渲染器**（Lottie 在 [opentake-render](../opentake-render/INDEX.md)）。
+> 透明 alpha、任意 TSX 与 frame-sequence source 仍是后续能力；当前 Beta 对它们显式报不支持。
 
 ---
 
 ## 总览
 
-- **[OVERVIEW.md](OVERVIEW.md)** — 定位与依赖分层、职责边界（做什么/不做什么，含"不是 Lottie 渲染器""不是 v1 主渲染器"）、关键概念与数据流（fallback 管线、确定性时钟、沙箱、与 render 集成桥）、对应上游 Swift（**无直接对应**，上游动态图形=Lottie 落 render/media）、完成状态（已实现纯逻辑 vs 计划中真实 CDP/Motion Canvas 插件）、移植铁律。
+- **[OVERVIEW.md](OVERVIEW.md)** — 定位与依赖分层、职责边界、Motion Canvas + fallback 数据流、确定性时钟/沙箱、桌面原子落轨与完成状态、对应上游 Swift、移植铁律。
 
 ## 子系统文档
 
-- **[renderer.md](renderer.md)** — `renderer.rs`：`MotionRenderer` trait + `deterministic_clock_script()`（注入页面、冻结时钟、`OpenTake.seek`）+ `StubRenderer`（确定性纯色帧、无依赖自制 PNG 编码器）+ `HeadlessChromiumRenderer`（真实 CDP 后端**骨架**：`data_url_for_code`/`frame_time_grid`，live 渲染未实现，返回 `RendererUnavailable`）。
+- **[renderer.md](renderer.md)** — `renderer.rs`：`MotionRenderer` trait + `deterministic_clock_script()`（注入页面、冻结时钟、`OpenTake.seek`）+ `StubRenderer`（确定性纯色帧、无依赖自制 PNG 编码器）+ feature-gated `HeadlessChromiumRenderer`（真实 CDP、CSP/请求拦截、超时/取消、逐帧 PNG；默认 build 返回 `RendererUnavailable`）。
 - **[sandbox.md](sandbox.md)** — `sandbox.rs`：`SandboxPolicy`（网络默认全拒 / 超时熔断 / 文档大小上限 / 无文件系统访问，**建模为类型**）+ `AllowedOrigin`（仅 https/loopback、无通配、拒明文远程）+ 纯检查 `check_url`（`data:` 放行）/ `check_document_size`。
 - **[manifest-source.md](manifest-source.md)** — `source.rs`（值类型：`MotionSource` Code/Template、`MotionRenderRequest` camelCase + 范围校验、`RenderedClip` 磁盘帧 + 末帧定格、`ParamValue`、`limits` 硬上限）+ `manifest.rs`（`MotionPlugin` 模板清单：容错解码 + 严格 `validate`/`validate_params`、`DurationMode`/`FpsPolicy`/`ParamSpec`）+ `error.rs`（`MotionError` thiserror）。
 - **[cache.md](cache.md)** — `cache.rs`：`content_hash`（SHA-256 over 源+参数+fps+尺寸+透明，规范字节流 + `opentake-motion/v1` 版本前缀 + 参数类型标签 + `-0.0` 归一）+ `MotionCache`（`root/<hash>/`、`is_cached` 按帧数完整性判定 partial=miss、`frame_file` 零填充）。
@@ -22,7 +22,7 @@
 
 ## 规格与设计
 
-- **[MOTION-GRAPHICS-PLUGIN.md](MOTION-GRAPHICS-PLUGIN.md)** — 动效 / AI Video 插件**设计规划**（Issue #34）：方向修正（Motion Canvas 优先 / 本 crate 转 fallback）、用户体验（Motion Panel）、模块边界（待新增 `plugins/motion-canvas-studio/` + Tauri `motion_canvas.rs`）、持久化、license/README 要求、v1 MP4 → v2 图片序列 → v3 原生 HTML/CSS fallback 的渲染策略、实施顺序、验证标准、风险、已完成/待做清单。⚠️ 只读规格，本目录文档以**代码现况**为准。
+- **[MOTION-GRAPHICS-PLUGIN.md](MOTION-GRAPHICS-PLUGIN.md)** — 动效 / AI Video 插件设计与 Beta v1 实施记录（Issue #34）：Motion Canvas wrapper、Motion Panel、Tauri/Core/Agent 边界、持久化、license、验证与后续 alpha/自由代码范围。
 
 ## 相关跨切面（架构）
 
@@ -35,18 +35,18 @@
 
 - [opentake-render](../opentake-render/INDEX.md) — **定义** `SourceMetrics`/`FrameProvider`/`DecodedFrame`（本 crate 实现之）；**真正的 Lottie 渲染**（`TextureSource::Lottie`）在此。
 - [opentake-domain](../opentake-domain/INDEX.md) — workspace 依赖（当前模块内未直接消费其类型）。
-- [opentake-agent](../opentake-agent/INDEX.md) — `add_motion_graphic` / `edit_motion_graphic` 工具（语义已改为 Motion Canvas scene/template；dispatch 待接线）。
+- [opentake-agent](../opentake-agent/INDEX.md) — `add_motion_graphic` / `edit_motion_graphic` 工具（按实时能力动态发布，已接生产桥）。
 
 ## 源码
 
 ```
 crates/opentake-motion/src/
 ├── lib.rs           模块声明 + 公开 API 扁平 re-export + crate 级管线/确定性/安全文档
-├── error.rs         MotionError（thiserror：InvalidSource/Request、Manifest、RendererUnavailable、Timeout、Sandbox、RenderFailed、Io）+ MotionResult
+├── error.rs         MotionError（thiserror：InvalidSource/Request、Manifest、RendererUnavailable、Timeout、Cancelled、Sandbox、RenderFailed、Io）+ MotionResult
 ├── source.rs        值类型：MotionSource(Code/Template)、MotionRenderRequest(camelCase+validate)、RenderedClip(磁盘帧+末帧定格)、ParamValue、limits 硬上限
 ├── manifest.rs      MotionPlugin 模板清单（plugin.json，容错解码 + validate/validate_params）、DurationMode/DurationSpec/FpsPolicy/ParamSpec/MotionPluginAuthor
 ├── cache.rs         content_hash（内容寻址键 + v1 版本前缀）+ MotionCache（root/<hash>/、完整性判定、零填充帧名）
-├── renderer.rs      MotionRenderer trait + deterministic_clock_script + StubRenderer(自制 PNG 编码器) + HeadlessChromiumRenderer(骨架，feature `chromium`)
+├── renderer.rs      MotionRenderer trait + deterministic_clock_script + StubRenderer(自制 PNG 编码器) + HeadlessChromiumRenderer(真实 CDP，feature `chromium`)
 ├── sandbox.rs       SandboxPolicy（网络/超时/文档大小/无 FS，建模为类型）+ AllowedOrigin + check_url/check_document_size
 └── integration.rs   MotionClipSource（impl SourceMetrics + FrameProvider）+ FrameDecoder 解码器注入
 ```
diff --git a/docs/modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md b/docs/modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md
index 36ae72ce..9238dd35 100644
--- a/docs/modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md
+++ b/docs/modules/opentake-motion/MOTION-GRAPHICS-PLUGIN.md
@@ -1,6 +1,6 @@
-# Motion Canvas 外部动效 / AI Video 插件规划
+# Motion Canvas 动效 / AI Video 插件设计与 Beta v1 实施记录
 
-> 状态:设计规划已切换到 **Motion Canvas 优先**。已有 `opentake-motion` scaffold 作为后续原生 frame-cache / alpha fallback,不再作为 v1 主渲染器。
+> 状态:**Beta v1 已实现并通过代码/原生集成验收（2026-08-01）**。固定 `title-card` 使用 Motion Canvas 3.17.2；HTML/CSS 路径保留为受限 fallback，透明/frame-sequence 属后续版本。
 > Issue trail:#34 motion dispatch / motion graphics;已认领实现切片。
 > 决策:先 fork / vendor Motion Canvas(MIT)做独立外部模块或内置插件,让它产出可导入的视频文件;OpenTake 负责一站式导入、落轨、预览和导出。
 
@@ -46,16 +46,16 @@ Motion Panel
 
 ## 2. 模块边界
 
-### `plugins/motion-canvas-studio/`(待新增)
+### `plugins/motion-canvas-studio/`（已实现）
 
-建议作为 forked upstream 的独立目录,不要混入 Rust core:
+作为锁定上游版本的独立 wrapper，不混入 Rust core:
 
 ```
 plugins/motion-canvas-studio/
-├── upstream/ or src/             Motion Canvas fork / wrapper
-├── templates/                    OpenTake 内置动效模板
-├── renderer/                     render orchestration
-├── package.json
+├── src/templates/title-card.tsx  OpenTake 内置 Motion Canvas 模板
+├── renderer/                     官方 Renderer.renderFrame 宿主
+├── bundle/runner.html            可复现、自包含离线 release artifact
+├── package.json / package-lock.json
 ├── LICENSE                       Motion Canvas MIT license notice
 ├── THIRD_PARTY_NOTICES.md
 └── README.md                     upstream、license、修改说明
@@ -67,10 +67,10 @@ plugins/motion-canvas-studio/
 - 调用 Motion Canvas image-sequence 或 FFmpeg video exporter。
 - 输出 `motion-result.json`,包含文件路径、fps、尺寸、时长、模板/代码 hash、license 元数据。
 
-### `src-tauri/src/motion_canvas.rs`(待新增)
+### `src-tauri/src/motion.rs`（已实现）
 
 Tauri command 层,只做边界 glue:
-- `motion_canvas_render_job(job)` 启动插件进程或内置 runner。
+- `motion_add` / `motion_edit` 启动内置 runner，并由 `motion_cancel` 取消活动任务。
 - 限制 job 工作目录在 app cache / project cache 下。
 - 捕获 stdout/stderr/progress。
 - 返回输出文件路径和 metadata。
@@ -173,7 +173,7 @@ MyProject.opentake/
 
 ### v1:MP4 materialization
 
-优先使用 Motion Canvas FFmpeg video exporter 输出 `.mp4`。
+使用 Motion Canvas 官方 `Renderer.renderFrame` 按固定时间采样 RGBA 画面，再由 OpenTake 随包 FFmpeg 输出 H.264 `.mp4`。
 
 优点:
 - 直接复用现有 OpenTake import / preview / export。
@@ -201,36 +201,36 @@ MyProject.opentake/
 
 ## 6. 实施顺序
 
-1. **文档与 issue claim**
+1. **文档与 issue claim** ✅
    - #34 已认领。
    - 更新本文件、ROADMAP、ARCHITECTURE、README。
 
-2. **License spike**
+2. **License spike** ✅
    - 固定 Motion Canvas upstream tag/commit。
    - 生成第三方依赖 license 清单。
 
-3. **插件 skeleton**
+3. **插件 skeleton** ✅
    - 新增 `plugins/motion-canvas-studio/`。
    - 能跑一个固定 template,输出 mp4。
 
-4. **Tauri command**
+4. **Tauri command** ✅
    - 新增 `render_motion_canvas` 或 `add_motion_canvas_clip`。
    - 调插件生成输出。
 
-5. **导入 + 落轨**
+5. **导入 + 落轨** ✅
    - probe 输出 mp4。
    - 创建 media asset。
    - `EditCommand::AddClips` 放入 timeline。
 
-6. **Motion Panel**
+6. **Motion Panel** ✅
    - 新增独立面板入口。
    - prompt/template/params/render/status。
 
-7. **Agent tool wiring**
+7. **Agent tool wiring** ✅
    - `add_motion_graphic` 接 Motion Canvas v1。
    - `edit_motion_graphic` 接可识别的 motion metadata。
 
-8. **后续 alpha**
+8. **后续 alpha**（未纳入 Beta v1）
    - 图片序列 source。
    - `ClipType::Motion` 或 `TextureSource::FrameSequence`。
    - native `opentake-motion` renderer 再进入主流程。
@@ -268,13 +268,12 @@ v2:
 - 本规划文档已从旧 HTML/CSS/CDP 主线改为 Motion Canvas 优先方案。
 - README、README.zh-CN、ROADMAP、ARCHITECTURE、WORKFLOW-PLUGIN-SYSTEM、media-SPEC 已同步 Motion Canvas / fallback 边界。
 - `crates/opentake-motion` scaffold。
-- `add_motion_graphic` / `edit_motion_graphic` tool name、args、schema 描述已改成 Motion Canvas TS/TSX scene/template 语义。
-- preview/export 已能处理普通 video media,所以 Motion Canvas mp4 v1 能复用现有路径。
-
-待做:
-- 新增 Motion Canvas plugin 目录。
-- 新增 Tauri motion command。
-- 新增 Motion Panel。
-- 将 agent dispatch 从 `not yet implemented` 接到 Motion Canvas workflow。
-- 增加 license notice / dependency license report。
-- 后续再接透明 alpha / frame sequence / native CDP fallback。
+- `plugins/motion-canvas-studio` 已锁定 Motion Canvas 3.17.2，包含 lockfile、模板、typed job、MIT LICENSE、THIRD_PARTY_NOTICES、依赖审计/许可证检查和可复现 runner bundle。
+- Tauri Motion 命令、进度/取消/验证、Core 单事务导入/落轨/替换、保存重开和一步撤销已接通。
+- Motion Panel 与 `add_motion_graphic` / `edit_motion_graphic` 已接同一生产桥，并按实际 Chromium/FFmpeg 能力动态发布。
+- 自动化已验证真实 Motion Canvas 像素、两次渲染确定性、错误无污染，以及 `composite_frame` / `export_video` 包含生成片段。
+
+待做（后续版本）:
+- 透明 alpha / PNG frame sequence / `TextureSource::FrameSequence`。
+- 任意用户 TS/TSX 工程编译与更多受支持模板；Beta v1 仅保证固定 `title-card`。
+- 将临时 `motion-result.json` 升级为项目内长期保留的独立 motion job/metadata 模型。
diff --git a/docs/modules/opentake-motion/OVERVIEW.md b/docs/modules/opentake-motion/OVERVIEW.md
index ba39c10d..fbf8d6dd 100644
--- a/docs/modules/opentake-motion/OVERVIEW.md
+++ b/docs/modules/opentake-motion/OVERVIEW.md
@@ -2,7 +2,7 @@
 
 > 上级：[模块目录 INDEX.md](INDEX.md) · [模块文档树](../INDEX.md) · [docs 总目录](../../INDEX.md)
 >
-> ⚠️ **本模块当前是脚手架 / fallback 层**。动效 / AI Video 的 v1 主路径改为外部 **Motion Canvas 插件**（待新增 `plugins/motion-canvas-studio/`，目前仓库中**尚不存在**），由它产出可导入的 `mp4`，OpenTake 按普通视频媒体导入、落轨、预览、导出。本 crate 保留为后续**原生透明 alpha overlay / RGBA frame-sequence / HTML-CSS fallback** 的基础设施。完整设计见 [Motion Graphics 插件设计](MOTION-GRAPHICS-PLUGIN.md)（只读规格）。
+> **Beta v1 已接入桌面时间线。** `plugins/motion-canvas-studio/` 提供锁定的 Motion Canvas 3.17.2 `title-card` runner；本 crate 提供离线 Chromium 帧宿主、缓存与 HTML/CSS fallback。Tauri/Core/Agent/Motion Panel 共用同一原子 Render → Import → Place/Replace 流程。完整设计与验收见 [Motion Graphics 插件设计](MOTION-GRAPHICS-PLUGIN.md)。
 
 ---
 
@@ -19,12 +19,12 @@ opentake-render          定义 DecodedFrame / SourceMetrics / FrameProvider 契
    ▲
 opentake-motion          ← 本模块：实现上述契约，提供 motion 帧序列 source
    ▲
-opentake-core / src-tauri / opentake-agent   未来的调用方（v1 走 Motion Canvas 插件，尚未接线）
+opentake-core / src-tauri / opentake-agent   已接 v1 调用方（渲染、验证、原子导入落轨）
 ```
 
-- **依赖**：`opentake-render`（**实现**它定义的 `DecodedFrame` / `SourceMetrics` / `FrameProvider` 三个 clip-source 契约，让 motion 帧序列对合成器零特殊处理）、`opentake-domain`（作为 workspace 依赖挂着，当前模块内未直接消费其类型）；纯逻辑依赖 `serde` / `serde_json` / `sha2` / `hex`（缓存键）/ `thiserror`（错误）。
-- **被调用**：设计上由 `opentake-core` / `src-tauri` / `opentake-agent` 调用（`add_motion_graphic` / `edit_motion_graphic`）；**但当前未接线**——v1 走外部 Motion Canvas 插件，原生 fallback 入口待后续阶段补。
-- **可选后端**：真实 headless-Chromium（CDP）渲染藏在 `chromium` cargo feature 之后；**默认 build 与 CI 完全离线、不需要浏览器**，骨架仍编译但 `render()` 返回 `RendererUnavailable`。
+- **依赖**：`opentake-render`（**实现**它定义的 `DecodedFrame` / `SourceMetrics` / `FrameProvider` 三个 clip-source 契约，让 motion 帧序列对合成器零特殊处理）、`opentake-domain`（作为 workspace 依赖挂着，当前模块内未直接消费其类型）；纯逻辑依赖 `serde` / `serde_json` / `sha2` / `hex`（缓存键）/ `thiserror`（错误）；`chromium` feature 另启用 `tungstenite`（CDP WebSocket）与 `base64`（截图解码）。
+- **被调用**：`src-tauri::motion` 通过本 crate 的 Chromium 渲染器驱动嵌入式 Motion Canvas runner 或 HTML fallback，`opentake-core` 原子注册媒体并落轨/替换，`opentake-agent` 与 Motion Panel 共享该桥。
+- **可选后端**：真实 headless-Chromium（CDP）渲染藏在 `chromium` cargo feature 之后；启用后定位 Chrome / Chromium / Edge 并逐帧输出 PNG。**默认 build 与 CI 完全离线、不需要浏览器**，未启用 feature 时 `render()` 返回 `RendererUnavailable`。
 
 模块没有顶层"门面 struct"，公开 API 在 `lib.rs` 扁平 re-export（值类型 + 缓存 + 渲染 trait + 沙箱 + 集成桥）。
 
@@ -36,16 +36,16 @@ opentake-core / src-tauri / opentake-agent   未来的调用方（v1 走 Motion
 - 定义动效**值类型**：`MotionSource`（`Code` 内联 HTML/CSS/JS，或 `Template` 模板 id + 参数）、`MotionRenderRequest`（fps / 帧数 / 宽高 / 透明）、`RenderedClip`（磁盘帧路径 + 元数据）。纯值、可序列化、可全单测。
 - **边界校验**：源（空代码 / 非法 hex 颜色）、请求范围（fps / 帧数 / 尺寸硬上限，见 `source::limits`）。
 - **内容寻址缓存**：SHA-256 over（源 + 参数 + fps + 尺寸 + 透明）→ 帧目录；同输入命中复用，任意改动失效（path-independent、self-invalidating）。
-- **确定性渲染契约** `MotionRenderer` trait + 两个实现：`StubRenderer`（无浏览器、纯函数纯色帧，给测试 / 离线管线）与 `HeadlessChromiumRenderer`（真实 CDP 后端**骨架**，feature-gated）。
+- **确定性渲染契约** `MotionRenderer` trait + 两个实现：`StubRenderer`（无浏览器、纯函数纯色帧，给测试 / 离线管线）与 `HeadlessChromiumRenderer`（真实 CDP 后端，feature-gated）。
 - **沙箱策略类型** `SandboxPolicy`：网络默认全拒（仅显式 origin 白名单）、渲染超时熔断、内联文档大小上限——把安全要求建模成**类型**，渲染器无法"忘记应用"。
 - **模板清单模型** `MotionPlugin`（`plugin.json`）：名称 / 参数 schema / 时长模型 / fps 策略 / 透明，含严格校验与"已绑定参数 vs schema"校验。
 - **集成桥** `MotionClipSource`：把 `RenderedClip` 适配成 render 的 `SourceMetrics` + `FrameProvider`，解码器（PNG→RGBA）由调用层注入（本 crate 默认依赖面不带解码器）。
 
 **不做（有意省略 / 不在本模块）：**
 - **不渲染 Lottie**。Lottie 的 `TextureSource::Lottie` / `lottie_frame` / `lottie_frame_count` 在 [`opentake-render`](../opentake-render/INDEX.md)；上游 `LottieVideoGenerator`（`.json`/`.lottie`→ProRes4444 alpha）映射到 render/media，**不是本 crate**。`MotionClipSource` 虽实现了 render trait 里的 `lottie_frame` 方法签名，但其实现只是转发到自己的帧序列，并非真正的 Lottie 源（见 §3 澄清）。
-- **不是 v1 主渲染器**。完整片头 / 解释动画 / 数据动画走外部 Motion Canvas 插件产 `mp4`，复用普通视频导入/预览/导出链路；本 crate 不阻塞该路径。
-- **不做真实浏览器渲染**（默认）。`HeadlessChromiumRenderer` 只有骨架 + 步骤文档，live CDP 调用 feature-gated 且**尚未实现**（即便开了 `chromium` feature 也返回 `RendererUnavailable`，绝不假装渲染成功）。
-- **不持 UI 状态 / 不做时间线落轨**。导入 + 落轨的单事务（Render → Import Media → Place Clip）属 `opentake-core`/`opentake-ops`，本 crate 只产帧 + 提供 source。
+- **Motion Canvas 模板是 v1 主模板路径**。本 crate 的 Chromium 宿主负责逐帧执行其官方 renderer；HTML/CSS/JS 仍是兼容 fallback。二者产 `mp4` 后复用普通视频导入/预览/导出链路。
+- **默认 build 不启动浏览器**。真实 CDP 后端必须显式启用 `chromium` feature；默认路径仍 fail-closed 返回 `RendererUnavailable`。
+- **不持 UI 状态 / 不直接做时间线落轨**。导入 + 落轨的单事务（Render → Import Media → Place Clip）仍属 `src-tauri`/`opentake-core`，本 crate 负责安全、确定性的帧生产。
 - **不定义 `ClipType::Motion`**。透明动效与新 clip 类型 / frame sequence source 是后续目标。
 - **不做帧↔秒折算的真理**。本 crate 内部 `t = frame / fps` 仅用于渲染时间网格；时间线帧↔秒的真理在 domain / 调用层（移植铁律，见 §6）。
 
@@ -61,7 +61,7 @@ MotionSource (Code 内联文档 | Template id + params)
        └─ content_hash ──▶ MotionCache   (命中 → 复用磁盘帧)
             └─ MotionRenderer::render    (未命中 → 渲染)
                  ├─ StubRenderer             (确定性、无浏览器；测试 / 离线)
-                 └─ HeadlessChromiumRenderer (CDP 虚拟时间逐帧截图；feature `chromium`，骨架未实现)
+                 └─ HeadlessChromiumRenderer (CDP 虚拟时间逐帧截图；feature `chromium`)
                       └─ RenderedClip (磁盘 RGBA PNG 帧序列)
                            └─ MotionClipSource: impl SourceMetrics + FrameProvider
                                 └─ opentake-render 合成器（未来纹理层）
@@ -90,6 +90,10 @@ MotionSource (Code 内联文档 | Template id + params)
 
 > **Lottie 方法澄清**：`MotionClipSource` 为满足 render 的 `FrameProvider` trait 实现了 `lottie_frame`，但它只是把请求转发到自身的帧序列——motion clip 始终是帧序列，不存在真正的 Lottie 内部帧概念。真正的 Lottie 渲染在 render（`TextureSource::Lottie`，见 [opentake-render](../opentake-render/INDEX.md)）。
 
+> **2026-08-01 注入边界复核 PASS**：生产依赖仍不包含 image/ffmpeg
+> 解码器；解码完全由 `MotionClipSource::new` 的闭包注入。桌面 Motion MP4
+> 物化另由 Tauri 的随包 FFmpeg 路径完成；Lottie 检查仍是独立未完成能力。
+
 ---
 
 ## 4. 对应上游 Swift
@@ -117,17 +121,22 @@ MotionSource (Code 内联文档 | Template id + params)
 - 内容寻址缓存：`content_hash`（规范字节流 + v1 版本前缀 + 参数类型标签 + `-0.0` 归一）、`MotionCache`（`dir_for` / `ensure_dir` / `is_cached` 按帧数完整性判定，partial 视为 miss / `frame_file` 零填充命名）。
 - 渲染契约 `MotionRenderer` trait + `deterministic_clock_script()`。
 - `StubRenderer`：确定性纯色 RGBA 帧、自制无依赖 PNG 编码器（stored-block zlib + CRC32 + Adler-32）、透明时 alpha 线性渐变、文档大小检查。
-- `HeadlessChromiumRenderer` **骨架**：步骤文档齐全、`data_url_for_code`（百分号编码）、`frame_time_grid`（虚拟时间网格）、validate + 沙箱大小检查均在"unavailable"路径前执行；live CDP 渲染**未实现**（无论是否开 `chromium` feature 都返回 `RendererUnavailable`）。
+- `HeadlessChromiumRenderer` **真实后端**：定位 Chrome/Chromium/Edge（支持 `OPENTAKE_CHROMIUM_PATH`/显式 path）、空临时 profile 启动、CDP 页面/尺寸/透明背景配置、作者脚本前确定性时钟注入、`OpenTake.seek(i/fps)` 后逐帧 PNG 截图、完整缓存复用与 partial 清理。CSP + `Fetch` 拦截执行精确 origin 白名单，默认离线；文档上限、全程超时、运行中取消、tab/browser crash 均显式映射错误并清理进程/profile。未启用 feature 或未找到浏览器时返回可操作的 `RendererUnavailable`。
 - 沙箱：`SandboxPolicy`（默认离线 / 自定义超时 / origin 白名单去重 / `check_url`（`data:` 放行、通配不支持、明文远程拒绝）/ `check_document_size`）。
 - 模板清单：`MotionPlugin`（容错解码、严格 `validate`、`validate_params` 必填+类型+未知参数拒绝、`effective_fps`、`DurationMode`/`FpsPolicy`/`ParamSpec`）。
 - 错误：`MotionError`（thiserror，含 `RendererUnavailable` / `Timeout` / `Sandbox` / `Io` 等可匹配变体）。
 - 集成桥：`MotionClipSource` 实现 `SourceMetrics` + `FrameProvider`，解码器注入、过末端钳位、缺帧返回 `None`。
 
+**Beta v1 已实现（集成验收）：**
+- `plugins/motion-canvas-studio/`：Motion Canvas 3.17.2 lockfile、MIT LICENSE/notice、typed job、`title-card.tsx`、确定性离线 runner 与可复现 bundle；npm audit 0，锁定依赖许可证门禁通过。
+- Tauri/Core：受控临时目录、离线 Chromium、进度/取消、FFmpeg `output.mp4`、`motion-result.json` 精确校验、项目 media capability 发布、单事务注册/落轨或替换、一步撤销与保存重开。
+- 产品入口：独立 Motion Panel 与动态发布的 Agent add/edit 工具共享生产桥；普通视频 preview/export 无需识别 Motion Canvas。
+- 自动化：两次固定模板渲染像素/哈希一致；失败、取消、遍历、符号链接、畸形/篡改元数据无 manifest/timeline 变更；`composite_frame` 与 `export_video` 均验证包含生成片段。
+
 **计划中 / 待做（明确未实现）：**
-- **真实 headless-Chromium 渲染**：`#[cfg(feature = "chromium")]` 下接 CDP 客户端（如 `chromiumoxide`）——定位/启动浏览器、`Fetch.enable` 请求拦截执行白名单、应用 CSP 与超时熔断、虚拟时间逐帧截图、CDP 错误映射到 `RenderFailed`/`Timeout`。**当前为 TODO(#34)**。
-- **v1 Motion Canvas 插件链路（主路径）**：`plugins/motion-canvas-studio/`（fork/vendor，MIT）、Tauri `motion_canvas.rs` 命令、独立 Motion Panel、agent dispatch 从 `not yet implemented` 接到 Motion Canvas workflow、license notice / 依赖 license report——**仓库中尚不存在**（无 `plugins/` 目录）。
-- **原生 fallback 接线**：把本 crate 的 `MotionClipSource` 真正接入合成器纹理层、引入 `ClipType::Motion` 或 `TextureSource::FrameSequence`、PNG 序列 source、透明 alpha overlay——属 v2/v3。
-- **持久化元数据**：`motion-result.json` / `media_metadata` 字段（engine/license/prompt/sourceHash…）为规划，未落地。
+- `MotionClipSource` 直接接入 `TextureSource::FrameSequence`、PNG sequence、透明 alpha overlay/ProRes4444——属 v2。
+- 用户提供的任意 TS/TSX 编译和通用模板工程宿主——Beta 仅开放固定 `title-card`；其他输入显式拒绝或走受限 HTML fallback。
+- 独立结构化 `motion_metadata`/长期保留 job 文件；Beta 使用 `generation_input` 保存可编辑来源，并在命令结果返回经验证的 output metadata。
 
 ---
 
diff --git a/docs/modules/opentake-motion/integration.md b/docs/modules/opentake-motion/integration.md
index 523e4003..df6fa138 100644
--- a/docs/modules/opentake-motion/integration.md
+++ b/docs/modules/opentake-motion/integration.md
@@ -12,6 +12,10 @@
 关键分工：**`opentake-render` 定义** `SourceMetrics` / `FrameProvider` 两个 trait 与 `DecodedFrame` 类型；本模块**实现**它们于 `RenderedClip` 之上。合成器问 clip 的自然尺寸（渲染画布），并按需拉取解码后的 RGBA 帧。
 
 > 完成状态：`MotionClipSource` 适配器**已实现并全测**；但合成器**尚未真正接入** motion 帧序列（v1 走 Motion Canvas 视频导入，native frame-sequence source 属后续，见 [OVERVIEW.md](OVERVIEW.md) §5）。
+>
+> 2026-08-01 复核：两个精确拥有者、完整 motion 包 58 项测试和
+> warnings-denied Clippy 通过；生产 `Cargo.toml` 仍只把 `image` 放在
+> `dev-dependencies`。
 
 ---
 
@@ -19,7 +23,7 @@
 
 帧文件→RGBA 的解码**刻意不**在本 crate 硬接某个 PNG 库。帧可能来自：
 - `StubRenderer`（自制 stored-block PNG），
-- 未来 native headless-Chromium fallback（标准 PNG），
+- native headless-Chromium fallback（标准 PNG），
 - Motion Canvas 图片序列输出，
 - 未来裸 RGBA 快路径。
 
@@ -29,7 +33,7 @@
 pub type FrameDecoder<'a> = dyn Fn(&Path) -> Option<DecodedFrame> + 'a;
 ```
 
-解码器对缺失/损坏文件返回 `None`——合成器把该帧当"缺帧"处理（与视频解码失败同语义）。
+解码器对缺失/损坏文件返回 `None`——合成器把该帧当"缺帧"处理（与视频解码失败同语义）；`MotionClipSource` 不修复、不替换也不改写帧缓存。精确拥有者同时覆盖有效 PNG、实际删除的文件和实际损坏的 PNG，并断言调用前后目录/坏文件不变。
 
 ---
 
@@ -65,7 +69,7 @@ RenderedClip (磁盘 PNG 帧)
             └─ opentake-render 合成器纹理层（未来接入）
 ```
 
-测试覆盖：`natural_size` = 渲染画布、`needs_premultiply` 跟透明、`decoded_frame` 返回正确形状 RGBA、过末端钳位仍解码、解码器失败返回 `None`、负 `source_frame` 映射到首帧。
+测试覆盖：`natural_size` = 渲染画布、`needs_premultiply` 跟透明、`decoded_frame` 返回正确形状 RGBA、过末端钳位仍解码、解码器失败返回 `None`、负 `source_frame` 映射到首帧；feature-gated live 验收还把真实 Chromium PNG 通过注入的 decoder 送入 `MotionClipSource`，验证尺寸与 RGBA 长度。
 
 ---
 
diff --git a/docs/modules/opentake-motion/renderer.md b/docs/modules/opentake-motion/renderer.md
index 00973c5e..fc448446 100644
--- a/docs/modules/opentake-motion/renderer.md
+++ b/docs/modules/opentake-motion/renderer.md
@@ -9,7 +9,7 @@
 
 定义动效渲染的**单一契约** `MotionRenderer` trait，并提供两个实现 + 一个共享的确定性时钟脚本。给定一个已校验的 `MotionRenderRequest`，产出 `RenderedClip`（磁盘上的 RGBA 帧序列）。这是其余系统唯一依赖的渲染抽象。
 
-> 完成状态：`StubRenderer` 与时钟脚本**已实现并全测**；`HeadlessChromiumRenderer` 是**骨架**——live CDP 渲染未实现（见下）。
+> 完成状态：`StubRenderer`、确定性时钟与 feature-gated 的真实 `HeadlessChromiumRenderer` 均已实现并测试；桌面 app/core 接线仍属于后续工作。
 
 ---
 
@@ -30,7 +30,7 @@ pub trait MotionRenderer {
 
 两个渲染器共享的注入 JS（返回 `&'static str`，便于 CDP 后端用 `Page.addScriptToEvaluateOnNewDocument` 在作者脚本前注入）：
 
-1. 冻结页面时钟——把 `document.timeline.currentTime` 钉死在虚拟时间（`seconds * 1000` ms），暂停 CSS/Web 动画。
+1. 冻结页面时钟——把 `document.timeline.currentTime`、`Date.now()`、`performance.now()` 钉死在虚拟时间（`seconds * 1000` ms），并按帧重置确定性 `Math.random()`。
 2. 暴露 `window.OpenTake.seek(seconds)`：宿主每帧调用一次（`t = frameIndex / fps`），确定性推进时间而非依赖墙钟。
 3. 暴露 `OpenTake.onSeek(fn)`：作者注册逐帧回调。
 
@@ -44,7 +44,7 @@ pub trait MotionRenderer {
 
 - 每帧是一块纯色 RGBA 填充，颜色是 `(帧号, content-hash)` 的纯函数（`frame_color`：从 hash 前几字节 XOR/加帧号派生 RGB）——保证可复现、且不同请求不同。
 - 透明时 alpha 沿 clip 线性渐变 `0..=255`（单帧 clip 不透明），让测试能断言 alpha 通道存活。
-- 即便是 stub 也执行沙箱**文档大小检查**（`SandboxPolicy::default().check_document_size`），让安全契约被测试覆盖。
+- 即便是 stub 也执行沙箱**文档大小检查**（`SandboxPolicy::default().check_document_size`），且在创建内容哈希目录之前拒绝超限输入；精确拥有者与 Chromium 路径共同断言零缓存副作用。
 - 流程：`req.validate()` → 大小检查 → `content_hash(req)` → `cache.ensure_dir` → 逐帧 `write_solid_rgba_png` 到 `frame_{i:05}.png` → 返回 `RenderedClip`。
 
 ### 自制 PNG 编码器（无依赖）
@@ -53,34 +53,30 @@ lib 代码里不引 `image` 依赖，而用一个微型**无依赖** RGBA PNG 
 - `zlib_store`：用 stored（type 0，未压缩）deflate 块 + Adler-32 包裹原始扫描线，能被任意标准 PNG 解码器还原。
 - `write_chunk` / `Crc32`（表-free，PNG/zlib 多项式）/ `adler32`：手写校验和。
 
-输出是有效（虽未压缩）的 PNG；dev-test 用真实 `image` crate 解码回来验证尺寸与 alpha。
+输出是有效（虽未压缩）的 PNG；dev-test 用真实 `image` crate 解码回来验证尺寸、alpha、精确 RGBA，并覆盖原始扫描线超过 65,535 bytes、必须拆成多个 stored-deflate block 的边界。相同输入直接编码两次及跨两个独立缓存渲染均逐字节一致。`image` 仍只在本 crate 的 `dev-dependencies`，不进入 production 直接依赖。
 
 ---
 
-## `HeadlessChromiumRenderer`（骨架，未实现）
+## `HeadlessChromiumRenderer`（真实 CDP 后端）
 
-真实后端的骨架，文档化并排序确定性 CDP 流程，但 live Chromium 调用 feature-gated。
+真实后端 feature-gated 于 `chromium`；默认 build 不带 WebSocket/截图解码依赖，也不需要本机浏览器。
 
-**骨架已实现的纯辅助（可单测）：**
+**纯辅助（可单测）：**
 - `data_url_for_code(html_css_js)`：把内联文档百分号编码成 `data:text/html;charset=utf-8,…`（保留 alnum 与 `-_.~`，其余编码）。确定性时钟由引擎注入而非内联，作者代码无法观测/剥离。
 - `frame_time_grid(req)`：返回 `[0/fps, 1/fps, …, (n-1)/fps]` 的虚拟时间戳网格，文档化并测试时间网格而不启动任何东西。
 - `policy()` / `cache()` 访问器。
 
 **`render()` 行为：**
 - 总是先 `req.validate()` + 应用自己负责的沙箱文档大小检查，**即便最终走 "unavailable" 路径**——这样接线方无论浏览器在不在都能看到策略失败（有专门测试：超限文档先报 `Sandbox` 错）。
-- `#[cfg(feature = "chromium")]`：当前仍 `Err(RendererUnavailable("…enabled but not yet implemented (Issue #34 native fallback TODO)"))`——开了 feature 也**不假装**渲染。
-- `#[cfg(not(feature = "chromium"))]`（默认 / CI）：`Err(RendererUnavailable("…not compiled in; build with chromium feature, or use StubRenderer…"))`。
+- `#[cfg(feature = "chromium")]`：显式 path → `OPENTAKE_CHROMIUM_PATH` → 平台安装位置 → `PATH` 依次定位 Chrome / Chromium / Edge；未找到时返回可操作的 `RendererUnavailable`。
+- 每次 render 使用唯一空 profile，启动时关闭浏览器后台网络/扩展/同步/文件系统访问 API；页面只导航到内联 `data:` 文档。
+- 在作者文档最前注入严格 CSP，同时用 CDP `Fetch.enable` 拦截每个请求：`data:` 与精确匹配白名单 origin 才放行，CSP 拒绝也从 `Log.entryAdded` 作为 `Sandbox` 失败返回。重定向会再次被拦截。
+- `Page.addScriptToEvaluateOnNewDocument` 在作者脚本前安装确定性时钟；文档同步加载后暂停 Chromium 虚拟时间，逐帧 `OpenTake.seek(i/fps)` + `Page.captureScreenshot`。
+- 全程共享一个 deadline 与 `MotionCancellationToken`；超时、运行中取消、tab/browser crash、CDP/PNG 错误均 fail-closed，终止子进程、删除 profile 与 partial 帧后才返回。
+- 完整内容寻址缓存直接复用；partial cache 在重渲染前清理。
+- `#[cfg(not(feature = "chromium"))]`（默认 / CI）：返回 `RendererUnavailable("…not compiled in…")`。
 
-**计划中的真实流程（骨架文档记录的步骤，待实现）：**
-1. 启动离屏 Chromium：无网络、空 profile、除所服务文档外无文件系统访问（应用 `SandboxPolicy`）。
-2. `Emulation.setDeviceMetricsOverride` 设到请求宽高。
-3. `Page.addScriptToEvaluateOnNewDocument` 注入 `deterministic_clock_script()`。
-4. `Emulation.setVirtualTimePolicy { policy: "pause" }` 停真实时间。
-5. 导航到文档（`Code` 用内联 `data:` URL，模板用其 served `entry`）。
-6. 逐帧：推进虚拟时间到 `i/fps` + `OpenTake.seek(i/fps)` → `Page.captureScreenshot`（透明时透明背景）→ 写 `frame_iiiii.png`。
-7. 返回 `RenderedClip`。
-
-`TODO(#34)` 明确列出：定位/启动浏览器并对缺失给清晰错误、用 `Fetch.enable` + 请求拦截执行网络白名单、应用 CSP 与超时熔断、CDP 失败映射到 `RenderFailed`/`Timeout`。
+`MotionSource::Template` 必须先由调用层解析/绑定为内联 `Code`；直接交给浏览器后端会返回 `UnknownTemplate`，不会猜测模板文件或授予文件系统路径。
 
 ---
 
@@ -88,8 +84,8 @@ lib 代码里不引 `image` 依赖，而用一个微型**无依赖** RGBA PNG 
 
 - **确定性**：stub 帧色是纯函数；真实后端用虚拟时间 + 注入时钟冻结墙钟 → 同请求字节一致。
 - **显式失败不假装**：后端不可用返回带可操作文案的 `RendererUnavailable`，绝不静默或伪造成功帧。
-- **沙箱不可绕过**：连 stub 与 "unavailable" 路径都先跑文档大小检查。
-- **无依赖 lib 面**：lib 代码自带 PNG 编码器，`image` 只在 dev-dep。
+- **沙箱不可绕过**：连 stub 与 "unavailable" 路径都先跑文档大小检查；live 路径用 CSP + CDP 请求拦截双层执行。
+- **默认依赖面精简**：lib 代码自带 stub PNG 编码器，`image` 只在 dev-dep；`tungstenite` / `base64` 仅随 `chromium` feature 启用。
 
 ---
 
diff --git a/docs/modules/opentake-motion/sandbox.md b/docs/modules/opentake-motion/sandbox.md
index c53b7809..2ea8e4c3 100644
--- a/docs/modules/opentake-motion/sandbox.md
+++ b/docs/modules/opentake-motion/sandbox.md
@@ -9,7 +9,7 @@
 
 为渲染**不可信** native fallback 动效代码（agent 生成或社区模板）提供安全策略。核心思路：把安全要求建模成**类型**（`SandboxPolicy`），使渲染器在类型层面无法"忘记应用"某条约束。策略类型与其纯检查住在本 crate、无需引擎即可单测；网络/CSP 的真正执行落在 `chromium` feature 后的真实 CDP 后端。
 
-> 完成状态：策略类型与纯检查（`check_url` / `check_document_size` / origin 解析）**已实现并全测**；其在真实浏览器中的执行（请求拦截 / CSP / 超时熔断）随 `HeadlessChromiumRenderer` 待实现（见 [renderer.md](renderer.md)）。
+> 完成状态：策略类型、纯检查及其在真实浏览器中的 CSP / CDP 请求拦截 / 超时与取消执行均已实现并测试（见 [renderer.md](renderer.md)）。
 
 ---
 
@@ -33,7 +33,7 @@
 
 允许的网络 origin（scheme + host[:port]），如 `https://cdn.jsdelivr.net`。
 
-- `parse(origin)`：规范化为小写、去尾斜杠；只接受 `https://`，或 loopback 的 `http://localhost` / `http://127.0.0.1` / `http://[::1]`（本地 dev 服务器）。**明文远程 origin 一律拒绝**（返回 `None`）。
+- `parse(origin)`：规范化为小写、去尾斜杠；只接受不含 path/query/fragment/userinfo 的 `https://host[:port]`，或精确 loopback 的 `http://localhost[:port]` / `http://127.0.0.1[:port]` / `http://[::1][:port]`。`localhost.evil.example` 等相似域名不会被当作 loopback；**明文远程 origin 一律拒绝**。
 - **不支持通配**：每个 origin 必须显式命名（对齐 web/security.md：不 cargo-cult 宽泛 `connect-src`）。
 
 ---
@@ -55,17 +55,17 @@ pub struct SandboxPolicy {
 
 ### `check_url(url)`（纯）
 - `data:` URI **永远放行**（内联、无网络）。
-- 否则当且仅当 URL（小写）以某个白名单 origin 为前缀时放行；空白名单 ⇒ 所有远程 URL 拒绝，返回 `MotionError::Sandbox`。
+- 否则当且仅当 URL 的 origin 精确匹配白名单（origin 后只能是 `/`、`?`、`#` 或结束）时放行；`https://allowed.example.evil` 不会因字符串前缀误放行。空白名单 ⇒ 所有远程 URL 拒绝，返回 `MotionError::Sandbox`。
 
 ### `check_document_size(document)`（纯）
-- 文档字节长度超 `max_document_bytes` 即 `Err(MotionError::Sandbox)`。
+- 按 UTF-8 **字节**计费；等于 `max_document_bytes` 可接受，超 1 字节即 `Err(MotionError::Sandbox)`。测试覆盖 ASCII 精确边界与多字节字符。
 
 ---
 
 ## 谁在调用
 
-- `StubRenderer` 与 `HeadlessChromiumRenderer` 都在 `render()` 里对 `MotionSource::Code` 调 `check_document_size`——连 stub 与 "renderer unavailable" 路径都不放过（见 [renderer.md](renderer.md)）。
-- `check_url` 的执行点是计划中的真实 CDP 后端（`Fetch.enable` + 请求拦截），当前仅纯检查 + 单测。
+- `StubRenderer` 与 `HeadlessChromiumRenderer` 都在 `render()` 里对 `MotionSource::Code` 调 `check_document_size`——连 stub、默认的 "renderer unavailable" 与 feature-enabled live 路径都不放过，并且都在创建内容哈希输出目录前拒绝（见 [renderer.md](renderer.md)）。
+- live Chromium 后端把 CSP meta 注入作者文档最前，并通过 `Fetch.enable` 拦截所有页面请求；每次请求（含重定向）调用 `check_url`，CSP/拦截拒绝以 `Sandbox` 返回。浏览器使用独立空 profile，启动参数关闭后台网络/扩展/同步/FileSystem Access API，render 结束或失败都终止进程并删 profile。
 
 ---
 
diff --git a/docs/modules/opentake-project/OVERVIEW.md b/docs/modules/opentake-project/OVERVIEW.md
index eec9649b..fe0d3c8e 100644
--- a/docs/modules/opentake-project/OVERVIEW.md
+++ b/docs/modules/opentake-project/OVERVIEW.md
@@ -114,6 +114,8 @@ Name.opentake/
 5. **路径语义对齐 Foundation**：归档去重用**纯词法** `standardize`（不 stat、不解符号链接，两条指向同一文件的符号链接各拷一份）；扩展名提取用 Swift `URL.pathExtension` 规则而非 `Path::extension`（`foo. mp4`、`..mp4` 均判**无扩展名**）。
 6. **日期是 Apple 参考日秒**：`created_at` 是 `f64`（Apple-reference-date 秒，`JSONEncoder` 默认 `Date` 编码），墙钟换算归上层。
 
+上述 serde 边界由 `upstream_compat` 的精确所有者用例验证：旧工程缺失字段与缺失版本按约定降级，显式版本保持不变，旧美元成本向上取整迁移为 credits；保存后重新打开时，迁移结果和一次性生成的日志 ID 必须完全相等。
+
 ---
 
 > 上级：[模块文档树](../INDEX.md) · [docs 总目录](../../INDEX.md) · 本模块目录：[INDEX.md](INDEX.md)
diff --git a/docs/modules/opentake-render/OVERVIEW.md b/docs/modules/opentake-render/OVERVIEW.md
index 45044a99..8f6ef0ea 100644
--- a/docs/modules/opentake-render/OVERVIEW.md
+++ b/docs/modules/opentake-render/OVERVIEW.md
@@ -88,7 +88,7 @@ Compositor::render_to_rgba(device, queue, size, &frame_plan, resolver) -> Decode
 - 纯函数 `build_render_plan` + `RenderPlan::frame` + `source_frame_index`（变速/trim 源帧换算），含混合序、同轨去重、隐藏轨剔除、文字层分离、黑底 clear（`plan/`，单测见 `plan/tests.rs` + `affine.rs` 内联测试）。
 - render 层几何 helpers `affine_transform` / `compose` / `crop_to_uv` / `normalize_box`，对拍上游 `affineTransform`（已知点 + 手算矩阵单测）。
 - wgpu 合成器 `Compositor::render_to_rgba`：单 pipeline、预乘 alpha-over blend、离屏 RT 256 对齐回读；设备获取 `RenderDevice::try_new` 无 GPU 时优雅跳过（CI/headless）。
-- 进阶像素链 in-shader（ADVANCED-FEATURES A 层落地部分）：线性光调色（曝光/白平衡/LGG/对比/饱和）、绿幕色度抠图（matte + spill 抑制）、线性/圆形蒙版（SDF + 羽化 + 反相，上限 `MASK_CAP=4`），WGSL 1:1 镜像 `opentake_domain::grade`。
+- 进阶像素链 in-shader（ADVANCED-FEATURES A 层）：线性光调色（曝光/白平衡/LGG/对比/饱和）、绿幕色度抠图（matte + spill 抑制）、线性/圆形/多边形蒙版（SDF + 羽化 + 反相 + 变换，上限 `MASK_CAP=4`），以及按列表顺序执行的闭集通用 Effect，WGSL 1:1 镜像 `opentake_domain::grade`。
 - 文字栅格化两套：`NullTextRasterizer`（占位，永不 panic）+ `CosmicTextRasterizer`（cosmic-text 排版 + swash 栅格，含字号画布相对缩放、对齐、背景盒、投影 box-blur、描边，输出预乘 RGBA）。
 - 纹理上传 + content-hash LRU 缓存（`TextureCache`）；导出尺寸 `even` / `export_render_size`（720p/1080p/4K 短边，不夹 1.0）。
 - 媒体源契约 trait `SourceMetrics` / `FrameProvider` / `TextureResolver` + `DecodedFrame`（render 侧定义，带默认实现 + 单测）。
@@ -99,10 +99,11 @@ Compositor::render_to_rgba(device, queue, size, &frame_plan, resolver) -> Decode
 - **运行期预览接线**（PORT-1TO1-GAP P1-9）：`composite_frame(frame) → RGBA/PNG` 命令 + media 侧 `FrameProvider` 适配器 + 前端暂停态贴 canvas。合成器本身就绪，缺的是 Tauri 命令与前端粘合。
 - **真实播放引擎**（ROADMAP Phase 4 / GAP P1-10）：ffmpeg 连续解码 + wgpu 上屏 + cpal 音频 + A/V 同步 + 精确 seek + scrub 30Hz 节流（移植 `VideoEngine`）。本 crate 不含任何播放状态。
 - **线性光混合**：当前 PoC 在 **sRGB 非线性域**直接混合以最贴近 AVFoundation（`RT_FORMAT = Rgba8Unorm`，`color.rs` 的 sRGB↔linear 已备但合成 over 未切线性）；线性光（RGBA16F）为质量增强项，仅在像素 diff 通过后切换（SPEC §3.7）。
-- **多边形（钢笔）蒙版 in-shader**：变长点列不适配固定 uniform，编码为全画布 no-op；穿 storage buffer 是 render 侧 TODO（domain 已存储且单测）。`effects: Vec<Effect>` 链亦仅透传、尚无对应 pass。
 - **转场 transitions**（相邻 clip 重叠区 pass）：ADVANCED-FEATURES A 层 p0，尚无实现。
 - **图片 / Lottie 物化**：`TextureSource::Image / Lottie` + `source_frame_index` 取模语义已在 plan 侧；实际像素由 media 侧 `image_pixels` / `lottie_frame` 提供（接线进行中）。
 
+**多边形（钢笔）蒙版与通用 Effect 链已落地**：钢笔路径使用与 domain 常量一致的定长 GPU 表示，编辑命令在写入前拒绝超过 4 个蒙版或超过 16 点的多边形；合成器仍以确定性截断作为绕过命令边界时的防御。通用 Effect 采用 `grayscale` / `sepia` / `invert` 闭集注册表，未知名称或参数在命令与渲染边界报错，禁用项跳过，启用项按持久化顺序执行。两条独立 GPU 子所有者分别覆盖蒙版的形状、边缘、羽化、反相、多蒙版交集，以及 Effect 默认/非默认参数、顺序、禁用项和预览/导出逐字节一致；无 GPU 环境按明确的 headless skip 契约退出。
+
 ## 移植铁律（Swift → Rust，本模块强约束）
 
 - **几何投影方向不得擅改**：CG 行向量左乘 `p' = p·M`、原点左下 y 上、半像素中心、纹理 v 翻转只一次——任一处错会整帧偏移。靠已知点单测 + 方向标记测试图锁死，绝不靠肉眼（SPEC §1.3/§3.3/§3.4 / 风险登记）。
diff --git a/docs/modules/opentake-render/text-rasterizer.md b/docs/modules/opentake-render/text-rasterizer.md
index a0c2d7d0..4612d32e 100644
--- a/docs/modules/opentake-render/text-rasterizer.md
+++ b/docs/modules/opentake-render/text-rasterizer.md
@@ -21,9 +21,9 @@
 `rasterize_box` 流程（对拍 `TextLayerController.applyStyle` L152 + `TextLayout`）：
 1. 空内容 / 退化框（`box_pixels` 返回 `None`）→ `None`；框尺寸钳到 `MAX_BOX_SIDE=8192`。
 2. **画布相对字号**（上游基准）：`font_px = font_size * font_scale * (canvas.h / 1080)`，下限 1px；行高 `1.2×`。`1080` = `CANVAS_BASIS_HEIGHT`（上游 referenceCanvasHeight）。
-3. cosmic-text 排版：`Buffer` 设框尺寸 + `set_text`（`attrs_for` 从 PostScript 名如 `Helvetica-Bold` 切出 family + 推断 bold）+ 行对齐（`to_align`）+ `shape_until_scroll`。
+3. cosmic-text 排版：`Buffer` 设框尺寸 + `set_text`（`attrs_for` 从 PostScript 名如 `Helvetica-Bold` 切出 family + 推断 bold；指定族缺失时走 fontdb 字体/脚本回退）+ 行对齐（`to_align`）+ `shape_until_scroll`。字体库为空时在 shaping 前进入确定性的 headless 分支，避免 cosmic-text 的无默认字体 panic，并继续输出正确尺寸的透明预乘帧（背景与边框仍可绘制）。
 4. **覆盖掩码**：`buffer.draw` 用白色，按 max 合并出每像素 0..255 coverage（重叠 glyph cell 取最强）。
-5. **合成进预乘 RGBA**（底到顶）：背景盒（`background.enabled` 填色）→ 投影（box-blur 掩码，按画布缩放算 `radius`/`offset`，**Y 上→图像行 Y 下故 offset_y 取负**）→ 文字（掩码 × `style.color`）→ 描边（`border` 2px 周边）。`over` 做直通源 alpha-over 到预乘缓冲。
+5. **合成进预乘 RGBA**（底到顶）：背景盒（`background.enabled` 填色）→ 投影（box-blur 掩码，按画布缩放算 `radius`/`offset`，**Y 上→图像行 Y 下故 offset_y 取负**）→ 文字（掩码 × `style.color`）→ 边框（1080p 基准 2px，随画布高度缩放且最小 1px）。`over` 做直通源 alpha-over 到预乘缓冲。
 6. 返回框尺寸的预乘 `DecodedFrame`。
 
 ## 源文件
@@ -35,15 +35,16 @@
 - **文字层 `nat_size` = 框像素尺寸、`preferred_transform` = 单位阵**（由 plan 侧 `make_clip_plan` 文字分支保证），使框纹理经标准 affine 1:1 落位。
 - **文字不做同轨去重**：每个可见文字 clip 各自一张纹理、各自一个 `LayerDraw`，且整体叠在所有视频之上（plan 的 `text_plans`，对齐上游 CoreAnimationTool 文字在视频合成之上）。
 - **输出预乘**：`DecodedFrame.premultiplied = true`，合成器对其 `needs_premultiply=false`。
-- **无字体不崩**：headless 无字面时仍产出框尺寸帧（背景/描边照画），仅 glyph 像素缺失。
+- **无字体不崩**：headless 无字体时仍产出框尺寸帧（背景/边框照画），仅 glyph 像素缺失。
+- **结构而非字体边缘锁定**：固定矩阵以 1080 高度、每侧 12px 阴影余量、2px 边框为上游基准，覆盖中英混排、缺失字体族回退、左右/居中、窄框换行与多分辨率缩放；CoreText/cosmic-text 的抗锯齿边缘差异不作为几何失败。
 
 ## 关系
 - 输入 `TextStyle` / `Rgba` / `TextAlignment` 来自 [opentake-domain](../opentake-domain/INDEX.md)；逐帧 opacity 由 [render-plan.md](render-plan.md) 的 `opacity_at` 提供。
 - 输出预乘 RGBA 纹理给 [gpu-compositor.md](gpu-compositor.md) 合成（文字层 `TextureSource::Text`，经 `TextureResolver` 接入）。
 
-## 计划中
-- 完整样式深化（更精确的换行/字体回退/阴影 padding 12×2 余量对齐、描边宽度按缩放）属 ROADMAP Phase 8 文字渲染收口；当前已覆盖 family+weight / 画布相对字号 / 颜色 / 水平对齐 / 背景盒 / 投影（offset+box-blur）/ 描边。
-- 文字静态渲染像素对拍上游（CoreText vs cosmic-text 边缘 Δ 不可避免，验收对文字区放宽到结构一致 SSIM，几何/字号/对齐需准）见 SPEC §6.2。
+## 已验证边界与后续扩展
+- `gpu_text#fallback_font_no_font_scaled_stroke_and_structural_golden_matrix` 固定上游结构基准并验证 family+weight、字体回退、中英混排、水平对齐、窄框换行、阴影 padding、画布相对字号/边框缩放，以及真实空字体库的非崩溃输出；重复栅格化必须逐字节相等（SSIM 1.0）。
+- CoreText 与 cosmic-text 的抗锯齿边缘存在平台差异，静态文字对拍按 SPEC §6.2 采用结构阈值；富文本多 span、显式 emoji/CJK 首选族提示和竖排仍属于后续扩展，不改变当前单样式横排契约。
 
 ---
 
diff --git a/docs/modules/src-tauri/setup-lib.md b/docs/modules/src-tauri/setup-lib.md
index 49eb6da3..8ec86d06 100644
--- a/docs/modules/src-tauri/setup-lib.md
+++ b/docs/modules/src-tauri/setup-lib.md
@@ -68,7 +68,9 @@ tauri::Builder::default()
 | `ProjectSaved` | `project_saved` |
 | `MediaChanged` | `media_changed` |
 
-payload 即事件本身（带 `kind` tag 形状）。`emit` best-effort：WebView 缺失（拆卸期）失败被忽略，不 panic。
+payload 即事件本身（带 `kind` tag 形状）。事件名映射与 best-effort 策略由不依赖 live
+`AppHandle` 的 `forward_core_event` 边界持有；`forward_event` 完成本地会话副作用后调用该边界。
+`emit` 失败（包括 WebView 拆卸期）被忽略，不 panic，也不会中断同一 `EventBus` 中后续观察者。
 
 ## 窗口生命周期（关窗不退 + Dock 重开）
 
diff --git a/docs/modules/web/SPEC.md b/docs/modules/web/SPEC.md
index ed79d206..75d25e6c 100644
--- a/docs/modules/web/SPEC.md
+++ b/docs/modules/web/SPEC.md
@@ -51,6 +51,8 @@
 > 来源:`UI/AppTheme.swift` 全文。上游 `AGENTS.md` 强制「所有 UI 样式必须用 AppTheme 常量，不得硬编码」。OpenTake 前端同样:**全部令牌定义为 CSS 变量，组件只引用变量。**
 > 颜色:上游用 0–255 或 0–1 的 sRGB。下方给出等价 `rgb()/rgba()`。深色主题(上游唯一主题,不做浅色)。
 
+追踪证据：`web/src/lib/theme.contract.test.ts` 锁定完整数值表与 CSS 投影，`web/src/styles/tokenUsage.test.ts` 抽样 Shell/Toolbar/Media/Inspector/Preview/Timeline 并扫描所有生产组件，任何未定义变量都会使测试失败。字幕约束与关键帧局部几何直接消费 `LAYOUT` 类型化常量，不再在组件中重复数值。
+
 ### 1.1 背景 Background（`AppTheme.swift:8-23`）
 
 | Token | 上游值 | CSS 变量 | 值 |
@@ -971,6 +973,8 @@ TimelineContainer (relative)
 
 > **跨平台键位**:macOS ⌘ → Win/Linux Ctrl;⌥ → Alt。Tauri 下用 `accelerator` 字符串复刻。keyCode 是 macOS 物理键码,前端用 `event.code`(如 `Space`/`KeyC`/`BracketLeft`/`Backquote`/`ArrowLeft`)更可靠,**逐键对照上表语义**。
 
+**OpenTake 代码门禁（2026-08-01）**:`resolveDocumentedShortcut` 与 `APPLICATION_MENU_SPEC` 共同构成可审计的 WebView/原生菜单快捷键边界。表驱动测试覆盖 macOS/Windows 修饰键、保存/另存冲突、Space 修饰与 repeat、媒体/时间线焦点、输入控件、弹窗、只读工程及非编辑视图 no-op；实际 hook 只执行解析后的单一语义命令。代码测试与生产构建已通过，打包桌面端逐键证据仍是最终勾选前置。
+
 ### 9.7 Hover / 焦点 / 游标态
 
 | 元素 | hover 效果 | 来源 |
@@ -985,6 +989,8 @@ TimelineContainer (relative)
 | scrub 条 | `pointingHand` + 变粗 | `PreviewContainerView.swift:655,677` |
 | 数字字段 | `resizeLeftRight`（ew-resize）| `ScrubbableNumberField.swift:185-187` |
 
+**OpenTake 代码门禁（2026-08-01）**:`timelineInteractionCursor` 是时间线刻度、trim、body、razor、drag 与只读态的唯一 cursor 投影；跨组件 owning matrix 同时覆盖 Transform/Crop、SplitPane、ScrubbableNumberField 与 HoverButton 的 enabled/disabled/active/dragging/focus 状态。数字字段已具备 spinbutton 键盘语义，禁用 hover 不再着色。代码测试与生产构建已通过，打包桌面实际交互/高对比度证据仍待顺序 GUI 阶段。
+
 ### 9.8 右键菜单（汇总，见 §5.10 详表）
 
 时间线 clip / 空白 / range / 淡变拐点 / 音量 kf / 关键帧泳道，菜单项逐字照搬（`TimelineView.swift:641-799` + `KeyframesLane.swift:contextMenu`）。Media 面板资产/文件夹右键（`MediaTab` 各处）。
@@ -1260,7 +1266,7 @@ interface Clip {                  // Timeline.swift:75-117
 ### 13.2 1:1 验收清单（逐项打勾）
 
 **A. 视觉（截图对拍，1600×1000）**
-- [ ] 五面板布局(default/media/vertical)的分栏比例、沟槽 5px、surface 圆角 6px、焦点环与上游一致。
+- [x] 五面板布局(default/media/vertical)的分栏比例、沟槽 5px、surface 圆角 6px、焦点环与上游一致。
 - [ ] 所有间距/字号/圆角/颜色取自令牌且与 §1 数值一致（抽查每面板 ≥5 处）。
 - [ ] Toolbar 按钮图标/分隔/缩放滑块(对数)外观一致。
 - [ ] 时间线:刻度间隔/次刻度/标签、轨道头(色条/标签/三图标/区分隔粗线)、clip(底色/左色条/标签/trim 手柄/波形/缩略图/音量橡皮筋/淡变/关键帧菱形)、playhead(红线+下三角)、磁吸黄虚线、marquee 白虚线、新轨黄线、razor 橙虚线 —— 逐项与上游同。
@@ -1275,7 +1281,11 @@ interface Clip {                  // Timeline.swift:75-117
 - [ ] §9.4 razor/split/关键帧/淡变/音量全 8 条。
 - [ ] §9.5 playhead/scrub/缩放全 9 条（含光标锚定缩放、灵敏度常量）。
 - [ ] §9.6 快捷键全表逐键。
+
+代码门禁已完成：完整表、平台修饰键、冲突/抑制规则与菜单动作均有 owning matrix；此项保持未勾选，直到打包应用逐键实际验证完成。
 - [ ] §9.7 hover/游标全表。
+
+代码门禁已完成：完整 hover/focus/cursor 表已由跨组件矩阵和纯 cursor 投影覆盖；此项保持未勾选，直到打包应用实际验证完成。
 - [ ] §9.8 右键菜单项与分组逐字（§5.10）。
 
 **C. 几何（单测）**
@@ -1285,8 +1295,21 @@ interface Clip {                  // Timeline.swift:75-117
 
 **D. 状态/契约**
 - [ ] 镜像只由 `timeline_changed`→`get_timeline` 更新；前端无任何直接改 timeline 的路径。
-- [ ] 每个编辑手势映射到正确 `edit_apply` 命令（§11.1）。
-- [ ] 持久化键（layoutPreset/三面板可见性/keyframes）跨会话保留。
+- [x] 每个编辑手势映射到正确 `edit_apply` 命令（§11.1）。
+
+该项由 `EDIT_GESTURE_COMMAND_MATRIX` 穷举 TypeScript `EditRequest` 的 41 个变体；编译期
+sentinel 在新增但未登记变体时失败。`commandRouting.test.ts` 逐 action 断言完整 camelCase
+DTO、空输入 no-op 和组件/Store 无直接 Timeline mutation；`api.editApply.test.ts` 验证生产
+Tauri envelope；Rust `every_frontend_edit_request_deserializes_to_intended_command` 逐个反序列化
+并核对对应 `EditCommand`（`freezeFrame` 由带媒体捕获的专用 `edit_apply` 分支接管）。
+- [x] 持久化键（layoutPreset/三面板可见性/keyframes）跨会话保留。
+
+持久化契约使用逐字段、带 schema 版本的键：`opentake.ui.v1.layoutPreset`、
+`opentake.ui.v1.agentPanelVisible`、`opentake.ui.v1.mediaPanelVisible`、
+`opentake.ui.v1.inspectorPanelVisible`、`opentake.ui.v1.keyframesPanelVisible`。首次读取时仅迁移
+通过严格校验的旧版无前缀键；非法/损坏值回落到 default / false / true / true / false，且不把
+损坏值写入新 schema。localStorage 不可用、读取抛错或写入失败时不得阻止当次 UI 更新。只持久化
+这五项全局 UI 偏好；工程 view、播放头、选择、最大化等工程/会话态在新 store 中必须恢复默认。
 
 ### 13.3 关键陷阱备忘（防止 1:1 偏差）
 
diff --git a/docs/modules/web/hooks-i18n-theme.md b/docs/modules/web/hooks-i18n-theme.md
index 77769844..6dbb4ded 100644
--- a/docs/modules/web/hooks-i18n-theme.md
+++ b/docs/modules/web/hooks-i18n-theme.md
@@ -25,7 +25,7 @@
 ## i18n/（轻量自研，无外部依赖）
 
 - `dict.ts`：扁平 key→value 字典，支持两个 locale——**`zh-CN`（简体中文，默认）** 与 **`en`（英文）**；字符串内 `{placeholder}` 由 `vars` 插值。
-- `index.ts`：Zustand 持久化当前 locale 到 localStorage（键 `locale`，默认 `zh-CN`）；`useT()` 返回记忆化翻译函数（切语言触发重渲染），`t()` 为命令式翻译器（用于非组件上下文，如行为标签），`initI18n()` 启动时写 `<html lang>`。`App.tsx` 启动调 `initI18n()`。
+- `index.ts`：Zustand 持久化当前 locale 到 localStorage（键 `locale`，默认 `zh-CN`）；启动时仅接受 `zh-CN`/`en`，非法持久值会被清除并回退中文，存储不可用时仍保持内存状态与 `<html lang>` 正确。`useT()` 返回记忆化翻译函数（切语言触发重渲染），`t()` 为命令式翻译器（用于非组件上下文，如行为标签），`initI18n()` 启动时写 `<html lang>`。缺失 key 原样返回；数值/字符串变量均可插值，未提供的命名占位符原样保留。`App.tsx` 启动调 `initI18n()`。
 
 ## lib/theme.ts — 设计令牌（数值常量单一源）
 
diff --git a/docs/modules/web/ipc-api.md b/docs/modules/web/ipc-api.md
index 9411941a..4eaa80be 100644
--- a/docs/modules/web/ipc-api.md
+++ b/docs/modules/web/ipc-api.md
@@ -17,7 +17,7 @@
 - **`isTauri`**：检测 `window.__TAURI_INTERNALS__`。Tauri 注入则为 `true`；纯 `vite dev`/`vite preview` 为 `false`。
 - **`ensureTauri()`**：懒加载 `@tauri-apps/api` 的 `invoke`/`listen`，浏览器下不引入。
 - 命令封装（每个都「Tauri → `invoke`；否则 → fallback / 空值」）：
-  - 编辑：`getTimeline` / `editApply(command)` / `editApplyMany`（串行，每条仍走单一 `EditCommand` 权威）/ `undo` / `redo` / `canUndo` / `canRedo`。
+  - 编辑：`getTimeline` / `editApply(command)`（每次只接受一个原子 `EditRequest`）/ `undo` / `redo` / `canUndo` / `canRedo`。
   - 工程：`projectNew` / `projectOpen` / `projectSave` / `getDefaultProjectDir` / `exportFcpxml`（实际产物是 XMEML，注释解释命名）。
   - 媒体：`importFolder` / `importMedia` / `getMedia` / `extractAudio` / `relinkMedia`（保留资产 id 就地恢复离线 clip）。
   - 预览/波形：`compositeFrame(frame, maxSize?)`（GPU 合成一帧 PNG dataURL；`Math.floor(frame)` 后再传，避免 Tauri 反序列化非整数不一致）/ `getWaveform`（**try/catch 包裹**，解码失败 `console.warn` 而非静默吞——这正是当年波形整类失效的根因）。
diff --git a/docs/releases/1.0.0-beta.1.md b/docs/releases/1.0.0-beta.1.md
new file mode 100644
index 00000000..059d6777
--- /dev/null
+++ b/docs/releases/1.0.0-beta.1.md
@@ -0,0 +1,55 @@
+# OpenTake 1.0.0-beta.1
+
+发布日期：2026-08-01（Asia/Shanghai）
+
+## Beta 目标
+
+提供一个可安装、可回滚、具备完整本地剪辑闭环的首个 Beta，让实际用户在 Apple Silicon
+macOS 上完成工程创建、素材导入、多轨编辑、预览、保存重开与交付导出，并能按需使用
+Agent、本地 AI、Motion Canvas 与 BYOK 生成能力。
+
+## 候选包验收顺序
+
+1. Home / 工程生命周期与恢复。
+2. 素材库、文件夹、收藏、缩略图、波形、代理与重链接。
+3. 时间线选择、拖放、裁剪、分割、复制、链接、吸附、撤销/重做与嵌套序列。
+4. 预览播放、seek、scrub、A/V 同步、画布 Transform/Crop/Mask 与关键帧。
+5. 文本/字幕、转写、翻译、SRT/VTT 与样式。
+6. 特效、调色、LUT、HSL、色彩匹配、蒙版、转场、防抖、补帧与智能擦除。
+7. 音频响度、降噪、声部分离、试听、独立落轨与导出。
+8. Agent/MCP、官方 Codex CLI / ChatGPT 登录、Codex Agent 实际编辑、口播清理、图文成片、
+   本地/云生成失败边界。
+9. Motion Canvas、原生 Chromium fallback、保存重开与最终导出。
+10. 数字人/音色克隆的无凭据拒绝、同意/成本控件、取消/重试、试听与撤销界面。
+11. 最终 H.264/H.265/ProRes、字幕和交换格式导出，重启后重新打开工程。
+
+每一项必须在同一候选包上按顺序执行；代码测试不能替代 GUI 观察，GUI 观察也不能替代
+媒体 probe、项目重开或导出文件检查。
+
+## 外部门槛
+
+- `fal`、ElevenLabs、OpenAI、Anthropic 凭据当前环境均未配置。未经用户提供凭据和明确
+  费用授权，不执行真实付费请求；确定性 provider fixture 已覆盖协议、原子性与持久化。
+- 官方 Codex CLI 登录是 Agent 的独立可选入口：OpenTake 只执行 `codex login status`、
+  `codex login`、`codex logout` 与受限的 `codex exec`，不读取、复制或持久化 ChatGPT 凭据。
+  候选包必须验证登录态显示和一次真实 MCP 编辑；该调用受用户 ChatGPT/Codex 账户条款约束。
+- 当前钥匙串只有 Apple Development 身份，没有 Developer ID Application 身份，也没有
+  Apple 公证凭据。本地 Beta 可以构建和使用，但不宣称已签名/公证。
+- Windows 安装器由 GitHub Actions 的精确提交 SHA 工作流构建。原生 Windows UI 人工烟测
+  需要 Windows 交互环境，不能由本机 macOS 伪造。
+- Unix 原子“创建目录并同时取得该创建对象身份”的可移植原语不存在；安全文件系统在该
+  单一生产操作上严格拒绝，普通工程目录创建使用已审计的上层完整包发布流程。
+
+## 回滚
+
+- 本 Beta 使用独立 prerelease 标签 `v1.0.0-beta.1`，不会移动正式版标签。
+- GitHub Release 保留候选包 SHA-256；发生阻断问题时撤下 prerelease 资产并回退到前一个
+  已验证提交，不改写用户工程。
+- 工程格式保持向后兼容；新增字段使用默认值。回滚前先复制 `.opentake` 包，避免旧程序
+  忽略新功能字段后继续保存造成语义丢失。
+
+## 发布证据
+
+最终候选包哈希、代码门禁、顺序 GUI 结果、媒体 probe、工程重开与外部限制将在
+`docs/audit/2026-07-14/runtime-artifacts/automated/beta-1-sequential-validation-2026-08-01.md`
+中冻结。
diff --git a/docs/specs/agent/10-implementation.md b/docs/specs/agent/10-implementation.md
index 0b7ffc0f..178427d4 100644
--- a/docs/specs/agent/10-implementation.md
+++ b/docs/specs/agent/10-implementation.md
@@ -68,7 +68,7 @@ src/
 
 **OpenTake 增强（ARCHITECTURE §7 `:154`，可后置）**
 16. [ ] 系统提示词分层化 + 模型策略从 `opentake-gen` 配置注入（§6.5.1）。
-17. [ ] 高阶工具 `remove_filler_words` / `tighten_silences`（把易错帧算术在 Rust 内一次完成）。
+17. [x] 高阶工具 `remove_filler_words` / `tighten_silences`（返回可审阅项目帧区间与原子 `ripple_delete_ranges` 命令；完整实机保存/重开/导出验收仍由审计计划跟踪）。
 18. [ ] 写工具统一返回结构化 JSON（§4.4 增强）。
 19. [ ] `get_capabilities`（一次性返回 ASR/视觉索引/生成/编解码就绪状态）。
 
diff --git a/docs/specs/agent/2-tools.md b/docs/specs/agent/2-tools.md
index 76c4d224..445be5ee 100644
--- a/docs/specs/agent/2-tools.md
+++ b/docs/specs/agent/2-tools.md
@@ -8,7 +8,7 @@
 
 枚举顺序严格按 `ToolName`（`ToolDefinitions.swift:4-36`）：`get_timeline, get_media, add_clips, insert_clips, remove_clips, remove_tracks, move_clips, set_clip_properties, set_keyframes, split_clip, ripple_delete_ranges, undo, add_texts, add_captions, generate_video, generate_image, generate_audio, upscale_media, import_media, list_models, inspect_media, get_transcript, inspect_timeline, search_media, list_folders, create_folder, move_to_folder, rename_media, rename_folder, delete_media, delete_folder`。
 
-> 这是上游 31 工具契约清单，不等于当前发现面。OpenTake 在 `ToolName::KNOWN` 保留 44 个兼容线名：基础 38 个真实路径工具始终发布；存在托管或 fal/Replicate/OpenAI/ElevenLabs 兼容 BYOK 凭据时动态增加 `generate_video`、`generate_image`、`generate_audio`、`upscale_media`。Motion 两个兼容线名仍不发布。
+> 这是上游 31 工具契约清单，不等于当前发现面。OpenTake 在 `ToolName::KNOWN` 保留 45 个兼容线名：基础集合最多 39 个，其中媒体桥相关工具仅在主机桥存在时发布；存在托管或 fal/Replicate/OpenAI/ElevenLabs 兼容 BYOK 凭据时动态增加 `generate_video`、`generate_image`、`generate_audio`、`upscale_media`。Motion 两个兼容线名仅在桌面 Chromium/FFmpeg 桥报告可用时动态发布。
 
 ### A. 读 / 内省（只读，7 个）
 
@@ -16,7 +16,7 @@
 |---|---|---|---|---|---|
 | 1 | `get_timeline` | `startFrame?:int`, `endFrame?:int`（窗口分页） | — | `core.timeline_snapshot(window)` → 压缩编码 | `video_classification`+`track_roles`+`editing_stage`+`stage_guidance` |
 | 2 | `get_media` | （无） | — | `core.media_manifest()` | — |
-| 3 | `inspect_media` | `mediaRef*:string`, `clipId?:string`, `maxFrames?:int(≤12)`, `startSeconds?:number`, `endSeconds?:number`, `wordTimestamps?:bool`, `overview?:bool` | `mediaRef` | `opentake-media`：FFmpeg 抽帧 + whisper 转写 | `clip_analysis_hint`（镜头类型/景别） |
+| 3 | `inspect_media` | `mediaRef*:string`, `clipId?:string`, `maxFrames?:int(≤12)`, `startSeconds?:number`, `endSeconds?:number`, `wordTimestamps?:bool`, `overview?:bool` | `mediaRef` | 图片/FFmpeg 抽帧 + whisper 转写 + Velato/Vello Lottie 灰底抽帧 | `clip_analysis_hint`（镜头类型/景别） |
 | 4 | `get_transcript` | `startFrame?:int`, `endFrame?:int`, `clipId?:string` | — | `opentake-media`：遍历时间线音/视轨，映射 trim/speed/position | `break_analysis`（气口/句界/重复/啰嗦） |
 | 5 | `inspect_timeline` | `startFrame?:int`, `endFrame?:int`, `maxFrames?:int(≤12)` | — | `opentake-render`：合成帧（transform/opacity/crop/keyframe + 文字烧入） | — |
 | 6 | `search_media` | `query*:string`, `scope?:enum{visual,spoken,both}`, `mediaRef?:string`, `limit?:int(≤50)` | `query` | `opentake-media`：CLIP 视觉 + 转写口语检索 | `material_match_hint`（B-roll 匹配优先级） |
diff --git a/docs/specs/core/4-frontend-sync.md b/docs/specs/core/4-frontend-sync.md
index b782a1cf..1182734a 100644
--- a/docs/specs/core/4-frontend-sync.md
+++ b/docs/specs/core/4-frontend-sync.md
@@ -26,4 +26,20 @@
 
 `get_timeline` 返回的不是 Rust `Timeline` 本体,而是**面向前端的 DTO**(serde 序列化)。Phase 6 前端态(ARCHITECTURE §2:「Timeline 只读镜像 + UI-only 态(selection/zoom)」)只读 DTO,**永不写回**——所有变更经 `edit_apply`。DTO 可直接 `serde` 复用 domain 的 `Serialize`(与 `.opentake/project.json` 同 schema,ARCHITECTURE §9),保证"持久化格式 = 线上格式",减少一套映射。
 
+### 4.5 已落地的收敛与只读边界
+
+- `projectStore.replaceProjectSnapshot` 是唯一整棵快照入口；同一工程的低版本、低
+  `projectEpoch` 快照均被拒绝，接受的 Timeline 会先 `structuredClone` 再递归冻结。
+  Store 不再暴露可绕过 identity/version 的 `setMirror`。
+- `sync.refreshMirror` 可携带事件承诺的 `{projectEpoch, version}` 下限。若第一次
+  `get_timeline` 落后，会有界重取；重试耗尽也不会发布旧快照。
+- 并发事件由 refresh generation 仲裁：N、N+2、N+1 乱序完成时只能提交 N+2。
+  工程切换同时以 `projectEpoch` 阻断旧工程快照、历史按钮结果和事件。
+- 浏览器 fallback 仍通过相同 `editApply` → `forceRefresh` → 冻结快照入口，不把其
+  内部可变 Timeline 引用泄露到 UI mirror。
+
+确定性证据：`sync.test.ts` 覆盖乱序、事件版本下限、工程切换、失败/停止边界；
+`commandRouting.test.ts#project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events`
+覆盖无旁路 mutator、单调拒绝、引用隔离与运行时冻结。
+
 ---
diff --git a/docs/specs/core/6-tauri-commands.md b/docs/specs/core/6-tauri-commands.md
index bf52d816..31dc52fd 100644
--- a/docs/specs/core/6-tauri-commands.md
+++ b/docs/specs/core/6-tauri-commands.md
@@ -1,88 +1,55 @@
 ## 6. Tauri command 表面(精确签名草案)
 
-> 全部 `#[tauri::command] async`,在 `src-tauri` 定义,**薄**(ARCHITECTURE §2:「Tauri command 边界(薄胶水:序列化 + 路由)」),body 仅:取 `State<EditorCore>` → 调 core 方法 → map 错误。**零业务逻辑**。命名采用 ARCHITECTURE §2 列出的集合。前端命名 camelCase,Rust snake_case(Tauri 自动转换;DTO 字段用 `#[serde(rename_all="camelCase")]`)。
+Tauri 只负责参数解析、边界校验、路由和序列化；时间线业务规则仍由 `AppCore::apply` 单一持有。注册表的唯一真相源是 `src-tauri/src/lib.rs` 中的 `tauri::generate_handler!`，前端生产桥接是 `web/src/lib/api.ts`、`libraryApi.ts` 和 `haptic.ts`。`api.commandContract.test.ts#frontend_command_names_match_invoke_handler` 静态比对两侧，任何前端字面量命令没有注册 handler 都会使 CI 失败。
 
 ### 6.1 命令清单
 
-```rust
-// ───────── 读 ─────────
-#[tauri::command]
-async fn get_timeline(core: State<'_, EditorCore>) -> Result<TimelineSnapshot, CmdError>;
-// → { timeline: TimelineDTO, version: u64 }  (§4.1 规则1)
-
-// ───────── 写(唯一编辑入口) ─────────
-#[tauri::command]
-async fn edit_apply(core: State<'_, EditorCore>, command: EditCommand) -> Result<EditResult, CmdError>;
-// command: 见 §2.2;返回 EditResult(含 timeline_version, changed, summary)
-
-#[tauri::command]
-async fn undo(core: State<'_, EditorCore>) -> Result<EditResult, CmdError>;  // 全局撤销(Cmd+Z),§2.4
-#[tauri::command]
-async fn redo(core: State<'_, EditorCore>) -> Result<EditResult, CmdError>;
-
-// ───────── 工程生命周期 ─────────
-#[tauri::command]
-async fn project_open(core: State<'_, EditorCore>, path: String) -> Result<TimelineSnapshot, CmdError>;
-// 打开 .opentake 目录;成功后返回首个快照(§5.4)。对应 AppState.openProject(:143-154)
-
-#[tauri::command]
-async fn project_save(core: State<'_, EditorCore>, path: Option<String>) -> Result<(), CmdError>;
-// path=None: 存回 project_dir(对应 autosave);path=Some: 另存为。对应 VideoProject.save(:66-73)
-
-// ───────── 播放 / 预览(不进撤销栈) ─────────
-#[tauri::command]
-async fn seek(core: State<'_, EditorCore>, frame: i64, mode: SeekMode) -> Result<(), CmdError>;
-// 钳制 + 透传 render 后端;帧经 preview_frame 事件回(§3.4)。对应 seekToFrame(:259)
-
-// ───────── 媒体导入 ─────────
-#[tauri::command]
-async fn import_media(core: State<'_, EditorCore>, source: ImportSource) -> Result<ImportedMedia, CmdError>;
-// ImportSource = Path(String) | Url(String) | Bytes{name,data}(ARCHITECTURE Phase2「本地/URL/bytes」)
-// 返回 { assetId, ... };异步缩略图/波形就绪后另发事件。对应 ToolExecutor+Import.swift
-
-// ───────── 导出(后台 job + 进度事件) ─────────
-#[tauri::command]
-async fn export_start(core: State<'_, EditorCore>, opts: ExportOptions) -> Result<ExportHandle, CmdError>;
-// 立即返回 { jobId };进度走 export_progress 事件(§3.2)。对应 ExportService.export(:73)
-```
+当前默认构建注册 81 个 handler：
 
-### 6.2 关键参数类型(对齐上游)
+| 领域 | 已注册命令 |
+|---|---|
+| 时间线/历史 | `get_timeline`, `edit_apply`, `undo`, `redo`, `can_undo`, `can_redo` |
+| 工程/首页/样例 | `project_new`, `project_open`, `project_save`, `get_default_project_dir`, `check_path_exists`, `home_projects_sync`, `home_project_register`, `home_project_remove`, `home_project_trash`, `home_project_reveal`, `sample_project_materialize` |
+| 交换与导出 | `export_xmeml`, `export_fcpxml`, `export_fcpxml_modern`, `export_edl`, `export_otio`, `export_subtitles`, `export_video`, `save_range_as_media`, `cancel_export` |
+| 工程媒体 | `import_folder`, `import_media`, `relink_media`, `get_media`, `toggle_favorite`, `sync_project_favorites`, `save_clip_as_media`, `extract_audio`, `get_waveform`, `generate_thumbnail`, `request_timeline_sprite`, `set_timeline_sprite_interactive`, `preview_poster`, `preload_media` |
+| 预览/播放 | `snap_haptic`, `composite_frame`, `cancel_composite_frame`, `capture_frame_to_media`, `playback_start`, `playback_pause`, `playback_stop`, `playback_seek`, `get_preview_endpoint` |
+| 生成/字幕/搜索 | `generation_cancel`, `generation_retry`, `transcribe_model_status`, `download_transcribe_model`, `transcribe_media`, `transcript_get`, `generate_captions`, `search_model_status`, `download_search_model`, `search_index_status`, `search_index_start`, `search_query` |
+| 密钥/账户/聊天 | `secret_save`, `secret_load`, `secret_delete`, `account_set_backend_url`, `account_get_backend_url`, `account_login`, `account_logout`, `account_get_status`, `chat_send`, `chat_history`, `chat_sessions`, `chat_session_set_open`, `chat_cancel` |
+| 全局素材库 | `library_list`, `library_favorite`, `library_unfavorite`, `library_categorize`, `library_rename`, `library_delete`, `library_import_to_project` |
+
+`playback_*` 与 `get_preview_endpoint` 受 `playback-engine` feature 控制；这些 handler 在默认桌面构建中启用。历史上的 `seek`、`play`、`pause`、`export_start`、`clip_copy`、`clip_paste`、`project_save_as` 和 `set_timeline_settings` 独立命令已不是契约：播放使用 `playback_*`，编辑使用 `edit_apply`，另存为 `project_save { path }`。
 
-```rust
-pub enum SeekMode { Exact, InteractiveScrub }   // 对应 PreviewSeekMode(EditorViewModel.swift:259)
+### 6.2 关键参数类型(对齐上游)
 
-pub enum ImportSource {                          // ARCHITECTURE Phase 2「本地/URL/bytes,扩展名白名单」
-    Path(String),
-    Url(String),
-    Bytes { name: String, data: Vec<u8> },
-}
+`edit_apply` 只接收 `{ command: EditRequest }`。`EditRequest` 是以 camelCase `type` 为 tag 的 41 分支严格联合，字段使用 camelCase，未知字段直接拒绝。它与 `web/src/lib/types.ts#EditRequest` 一一对应，并由 `commands.rs#every_edit_request_maps_to_exact_edit_command` 验证每个分支只转换为同名 `EditCommand`。
 
-pub struct ExportOptions {                       // 对应 ExportService.export(format:resolution:)
-    pub format: ExportFormat,                    // H264 | H265 | ProRes | Xml(对应 ExportService.swift:5 / ExportView.swift:13-16)
-    pub resolution: ExportResolution,            // R720p | R1080p | R4K(对应 ExportView.swift:26 默认 1080p)
-    pub output_path: String,
-}
-pub enum ExportFormat { H264, H265, ProRes, Xml }
-pub enum ExportResolution { R720p, R1080p, R4K }
+成功返回 `EditResultDto`：
 
-pub struct ExportHandle { pub job_id: String }   // 后续进度经事件(§3.2)
+```ts
+type EditResult = {
+  changed: boolean;
+  actionName: string;
+  affectedClipIds: string[];
+  timelineVersion: number;
+  summary: string;
+};
 ```
 
-> **导出表面证据**:`ExportService.swift:73-78` `func export(... format: ExportFormat, resolution: ExportResolution)`;`ExportService.swift:5` `enum {h264,h265,prores,xml}`;`ExportView.swift:13-26` `VideoCodec{h264,h265}` + `ExportResolution` 默认 `.r1080p`。OpenTake 把 `xml`(FCPXML 导出,`XMLExporter.swift:40`)保留为 `ExportFormat::Xml`(纯逻辑,无需 wgpu,可早做)。**预设码率/profile** 对齐属 Phase 5(ARCHITECTURE §6、ROADMAP Phase 5),core 只定 `ExportOptions` 契约。
+`get_timeline` 返回 `{ timeline, projectEpoch, version, projectPath, compatibilityReadOnly, compatibilityBlockers }`。导出、媒体、播放等命令的请求/响应 DTO 以各自 Rust `#[derive(Deserialize, Serialize)]` 结构和同名 TypeScript wrapper 为准，不再维护一份可漂移的伪代码签名。
 
 ### 6.3 错误约定
 
-```rust
-#[derive(Serialize)]
-pub struct CmdError { pub code: String, pub message: String }  // code 机读,message 人读
+核心编辑、undo/redo 和保存边界返回稳定结构：
+
+```ts
+type CommandError = {
+  code: "validation" | "internal";
+  message: string;
+};
 ```
 
-- 校验失败(如越界帧、未知 clipId)→ `code: "validation"`,`message` 带**精确路径**(ARCHITECTURE §7:`entries[3].startFrame: missing required field`,用 `serde_path_to_error`)。对应上游 `formatDecodingError`(`ToolExecutor.swift:210-229`)与各工具的 `entries[idx]: …` 报错(`ToolExecutor+Clips.swift:148-167`)。
-- core 内部错(IO/解码)→ `code: "internal"`,`message` 友好化,详细上下文记日志(CLAUDE.md 错误处理:UI 友好 + 服务端详细)。
-- **错误不致命**:命令失败时 timeline 不变、version 不变、无事件(§2.3 步骤 2 早返回)——前端镜像保持一致。
+前端将该 DTO 投影为 `TauriCommandError`，保留 `code` 并让 `message` 可直接显示。输入校验失败必须在任何 timeline/version/event 副作用前返回 `validation`；内部失败返回 `internal`，且面向前端的消息不泄漏内部路径或凭据。`opentake-core::dto::edit_apply_handler_maps_validation_error` 同时断言 timeline、version、project identity 和事件数均不变。
 
 ### 6.4 `edit_apply` 与 agent 工具的关系(避免重复定义)
 
-UI 直接传 `EditCommand` 给 `edit_apply`。Agent/MCP **不**经 `edit_apply` Tauri 命令(它们在 Rust 进程内直接持 `EditorCore` 句柄,§2.5),但**最终汇入同一个 `EditorCore::apply`**。即:`edit_apply` Tauri 命令 = UI 客户端的入口;`EditorCore::apply` = 三客户端的共同汇聚点。二者不重复——前者是后者的一个调用方。
-
----
+UI 通过 Tauri `edit_apply` 进入；Agent/MCP 在 Rust 进程内直接持有 `AppCore`。两者最终都只调用 `AppCore::apply`，因此共享同一个校验、原子提交、undo 和事件语义；Agent 不绕过核心实现另写一套编辑逻辑。
diff --git a/docs/specs/frontend/1-design-tokens.md b/docs/specs/frontend/1-design-tokens.md
index ec9e956c..f39276bc 100644
--- a/docs/specs/frontend/1-design-tokens.md
+++ b/docs/specs/frontend/1-design-tokens.md
@@ -3,6 +3,8 @@
 > 来源:`UI/AppTheme.swift` 全文。上游 `AGENTS.md` 强制「所有 UI 样式必须用 AppTheme 常量，不得硬编码」。OpenTake 前端同样:**全部令牌定义为 CSS 变量，组件只引用变量。**
 > 颜色:上游用 0–255 或 0–1 的 sRGB。下方给出等价 `rgb()/rgba()`。深色主题(上游唯一主题,不做浅色)。
 
+OpenTake 实现以 `web/src/lib/theme.ts` 作为 Canvas/TypeScript 数值表，以 `web/src/styles/tokens.css` 作为 DOM/CSS 投影。`theme.contract.test.ts#complete_upstream_token_table_and_css_projection` 对照本文全表验证两侧精确值；`tokenUsage.test.ts#representative_panel_spacing_type_radius_and_color_matrix` 验证六个主要界面表面的代表性消费，并拒绝所有生产组件中未定义的 CSS 变量引用。
+
 ### 1.1 背景 Background（`AppTheme.swift:8-23`）
 
 | Token | 上游值 | CSS 变量 | 值 |
diff --git a/docs/specs/frontend/10-state.md b/docs/specs/frontend/10-state.md
index 435ef0bf..d050a4a8 100644
--- a/docs/specs/frontend/10-state.md
+++ b/docs/specs/frontend/10-state.md
@@ -1,99 +1,48 @@
 # Zustand 状态结构（只读镜像 + UI-only 态）
 
-> 拆分依据:上游 `EditorViewModel` 字段（`EditorViewModel.swift`）按「Rust 真相镜像」vs「纯前端 UI 态」分流。**镜像态只能由 `timeline_changed` event 更新,前端绝不直接改;UI 态前端自由改。**
+Rust 是工程、时间线和媒体的唯一真相源。前端将权威快照与纯 UI 交互状态分开：镜像只能整体替换，UI 态可以本地更新。
 
 ### 10.1 镜像态（来自 Rust，只读）—— `useProjectStore`
 
-```ts
-interface ProjectMirror {
-  // 由 timeline_changed{version} 驱动重取(get_timeline)
-  timelineVersion: number;          // ← 上游 timelineRenderRevision (EditorViewModel.swift:76)
-  timeline: Timeline;               // fps/width/height/tracks (见 §12)
-  // 媒体库(运行时富对象, 来自 Rust)
-  mediaAssets: MediaAsset[];        // EditorViewModel.swift:110
-  folders: MediaFolder[];
-  offlineMediaRefs: Set<string>;    // :111
-  unprocessableMediaRefs: Set<string>; // :112
-  // 工程信息
-  projectUrl: string | null;
-  projectId: string | null;
-  isDocumentEdited: boolean;        // :185
-  // 能力/账户(只读)
-  canGenerate: boolean;
-}
-```
+`useProjectStore` 保存 `projectEpoch`、`timelineVersion`、已深拷贝并冻结的 `timeline`、`projectPath`、兼容只读状态、保存版本与 undo/redo 可用性。工程媒体由独立 `mediaStore` 承载，同样只能由 Rust 命令返回/事件驱动刷新。
+
+权威边界规则：
+
+- 生产代码不得对镜像的 `tracks`、`clips`、帧位置或 version 做就地写入；所有编辑调用 Rust 命令。
+- `replaceProjectSnapshot` 拒绝更小的 project epoch，也拒绝同工程更小的 version。
+- 事件承诺版本 N 后，`sync` 只能发布达到 N 的快照；有界重试仍达不到时保留当前快照。
+- 并发刷新用 generation 和 mutation revision 仲裁，迟到的 N/N+1 不得覆盖已接受的 N+2。
+- 编辑、undo、redo 和工程切换后重取权威快照；失败命令不改镜像。
 
 ### 10.2 UI-only 态 —— `useEditorUiStore`（前端自管）
 
-```ts
-interface EditorUiState {
-  // —— 播放/播放头 (上游 EditorViewModel.swift:55-98) ——
-  currentFrame: number;             // 提交后的播放头帧
-  activeFrame: number;              // = playheadState.timelineFrame(scrub 时的实时帧, :58)
-  sourcePlayheadFrame: number;      // 源预览播放头(:96)
-  isPlaying: boolean;               // :59
-  isScrubbing: boolean;             // :77
-
-  // —— 选择 (上游 :60-66) ——
-  selectedClipIds: Set<string>;     // :61
-  isMarqueeSelecting: boolean;      // :62
-  selectedGap: GapSelection | null; // :63
-  selectedTimelineRange: TimelineRange | null; // :64
-  selectedMediaAssetIds: Set<string>; // :65
-  selectedFolderIds: Set<string>;   // :66
-
-  // —— 时间线视图 (上游 :68-77) ——
-  zoomScale: number;                // = pixelsPerFrame, 初值 4.0 (:68)
-  minZoomScale: number;             // 由可视宽+总帧算; 前端复刻或从镜像取
-  timelineVisibleWidth: number;     // :75
-  scrollLeft: number; scrollTop: number; // 滚动位置(上游隐含在 NSScrollView)
-  toolMode: 'pointer' | 'razor';    // :78 (ToolMode)
-  trackDisplayHeights: Record<string, number>; // 轨道高(不持久, 默认 50; 上游 Track.displayHeight)
-
-  // —— 画布(Preview) (上游 :69-74) ——
-  canvasZoom: number;               // :69 (≤1 时 offset 归零)
-  canvasOffset: { width: number; height: number }; // :74
-  cropEditingActive: boolean;       // :90
-  cropAspectLock: CropAspectLock;   // :91
-
-  // —— 面板 (上游 :46-47, 135-157) ——
-  focusedPanel: Panel | null;       // :46
-  maximizedPanel: Panel | null;     // :47
-  layoutPreset: 'default'|'media'|'vertical'; // :99 (持久化 localStorage)
-  agentPanelVisible: boolean;       // :135 (默认 false, 持久化)
-  mediaPanelVisible: boolean;       // :141 (默认 true, 持久化)
-  inspectorPanelVisible: boolean;   // :147 (默认 true, 持久化)
-  keyframesPanelVisible: boolean;   // :153 (默认 false, 持久化)
-
-  // —— Preview tabs (上游 :92-95) ——
-  previewTabs: PreviewTab[];        // 初值 [timeline]
-  activePreviewTabId: string;       // :93
-  previewTabHistory: string[]; previewTabHistoryIndex: number; // :94-95(前进/后退)
-
-  // —— Media 面板导航 (上游 :161-170) ——
-  mediaPanelCurrentFolderId: string | null;
-  mediaPanelRevealAssetId: string | null;
-  mediaPanelScrollTarget: string | null;
-  mediaPanelToast: string | null;
-
-  // —— 对话框/生成 (上游 :79-89) ——
-  showExportDialog: boolean;        // :79
-  showGenerationPanel: boolean;     // :80 (打开时切到 Media tab)
-  pendingReplacements: Set<string>; // :89 (生成中的 clip id)
-  pendingSwapClipId: string | null; // :66
-
-  // —— 剪贴板(可由 Rust 持有, 前端只读能否粘贴) ——
-  canPasteClips: boolean;
-}
-
-type Panel = 'agent'|'media'|'preview'|'inspector'|'timeline';
-```
+`useEditorUiStore` 只持有交互状态：
+
+- 导航/对话框：`view`、settings/export/save-as/project-settings 状态。
+- 播放头：`currentFrame`、`activeFrame`、播放/scrub 与 decoder fallback 状态。
+- 选择：clip/media/folder 选择、range、gap、marquee。
+- 时间线视图：`zoomScale`、最小缩放、scroll、可见宽度、工具与临时 track display height。
+- 预览：canvas zoom/offset、预览质量、媒体预览、crop 交互。
+- 面板：focus/maximize/fullscreen、layout preset、面板可见性与子标签。
+- 项目内临时 UI：当前媒体文件夹、swap 目标、toast 等。
+
+`resetProjectRuntimeState` 在工程 identity 变化时清除播放头、选择、滚动、track heights、预览媒体、crop/swap/对话框等项目内状态，同时保留全局 layout、面板可见性与 timeline zoom 偏好。
 
 ### 10.3 派生选择器（前端纯函数，不进 store）
 
-复刻上游计算属性：`totalFrames`(Timeline.swift:16-22)、clip rect / playhead x（§5.2 geometry）、`zones`(视频/音频区划分，TimelineHeaderView 用)、`validSelectedTimelineRange`、各 Inspector 的 `selectedVisualClip(s)`/`selectedAudioClip(s)`/`availableTabs`(InspectorView.swift:170-200)。**这些是纯函数,从镜像 + UI 态算,不存储**(避免冗余,符合上游"派生不存"原则)。
+`totalFrames`、clip rect、playhead x、track zones、有效 range、Inspector 选中对象与可用 tab 都由当前 Rust 镜像 + UI 态即时计算。不将这些可派生数据再次持久化或作为第二份工程真相。
 
 ### 10.4 持久化
 
-- `localStorage`：`layoutPreset` / `agentPanelVisible` / `mediaPanelVisible` / `inspectorPanelVisible` / `keyframesPanelVisible`（对应上游 `UserDefaults`，`EditorViewModel.swift:99-157`）。
-- 其余 UI 态会话内存即可。
+UI store 只写入带 schema 版本的 `opentake.ui.v1.*` 全局偏好：
+
+- `layoutPreset`
+- `agentPanelVisible`
+- `mediaPanelVisible`
+- `inspectorPanelVisible`
+- `keyframesPanelVisible`
+- `zoomScale`（`0.05...40`）
+
+旧的无前缀同名键仅作一次迁移来源；合法值迁移到 v1，损坏、越界或无法解析的值会删除并使用默认值。这些键不包含 project id/path，因为它们是跨工程用户偏好；所有项目内 UI 态在切换时清理而不持久化。
+
+主题、窗口大小、默认导入目录和 BYOK provider 选择由 `settingsStore` 持久化；API key 只进入系统密钥链，不进入 Zustand/localStorage。最近工程在桌面端以 Rust `ProjectRegistry` 为权威，localStorage 仅用于浏览器预览和旧版迁移缓存。timeline、clips、media catalog、凭据、拖拽/播放/对话框临时状态均不得写入 UI 持久化表面。
diff --git a/docs/specs/frontend/11-tauri.md b/docs/specs/frontend/11-tauri.md
index 973fac7c..2a94625e 100644
--- a/docs/specs/frontend/11-tauri.md
+++ b/docs/specs/frontend/11-tauri.md
@@ -1,60 +1,40 @@
 # Tauri command / event 对接点
 
-> 依据 ARCHITECTURE.md §2「真相源在 Rust,前端持镜像」+ §5 EditCommand 枚举。前端**所有编辑都经 invoke 发命令**,**绝不本地改镜像**;镜像由 event 更新。
+前端的时间线是 Rust 真相源的只读投影。所有提交性编辑通过 `api.editApply(command)` 调用 `edit_apply`；成功后根据事件中的 project epoch/version 重取 `get_timeline`。拖拽 ghost、hover、playhead 等短暂 UI 状态可本地更新，不得写回时间线镜像。
 
 ### 11.1 命令（invoke）—— 编辑 / 读取 / 播放 / 工程
 
-> 上游所有编辑手势最终调 `EditorViewModel` 的方法(如 `moveClips`/`commitTrim`/`splitClip`/`addClips`...),OpenTake 归一到 `EditCommand`(ARCHITECTURE §5)。前端把 §9 各手势的"提交"映射到对应 invoke。
+| 前端行为 | 生产命令 |
+|---|---|
+| 41 种时间线编辑（移动、trim、split、文字、字幕、属性、关键帧、轨道、文件夹等） | `edit_apply { command }` |
+| 撤销/重做/可用性 | `undo`, `redo`, `can_undo`, `can_redo` |
+| 工程新建/打开/保存 | `project_new`, `project_open`, `project_save { path }` |
+| 导入/重链/媒体目录 | `import_folder`, `import_media`, `relink_media`, `get_media` |
+| 播放/精确 seek/预览端点 | `playback_start`, `playback_pause`, `playback_stop`, `playback_seek`, `get_preview_endpoint` |
+| 视频导出/取消 | `export_video`, `cancel_export` |
+| 时间线交换/字幕 | `export_xmeml`, `export_fcpxml_modern`, `export_edl`, `export_otio`, `export_subtitles` |
+| 生成/转录/字幕/语义搜索 | 使用核心规范第 6.1 节的同名已注册 handler |
 
-| 前端动作（来自 §9 手势/菜单） | invoke 命令（建议名）| 上游对应方法 |
-|---|---|---|
-| 移动 clip 提交 | `edit_apply` { MoveClips } | `moveClips` (TimelineInputController:862-868) |
-| 复制 clip 到位 | `edit_apply` { DuplicateClips } | `duplicateClipsToPositions` |
-| trim 提交 | `edit_apply` { TrimClips } | `commitTrim` (:440-458) |
-| split | `edit_apply` { SplitClip } | `splitClip` (:74) |
-| 删除 / ripple 删 | `edit_apply` { RemoveClips / RippleDeleteRanges } | `deleteSelectedClips`/`rippleDelete*` |
-| 拖入添加 / ripple 插 | `edit_apply` { AddClips / InsertClips } | `addClips`/`rippleInsertClips` (:966-1020) |
-| 改属性(scale/rotation/opacity/volume/speed/fade/flip/crop) | `edit_apply` { SetClipProperties } | `commitScale/Rotation/Opacity/Volume/ClipSpeed/Fade` 等 (InspectorView) |
-| 关键帧 戳/删/移/插值 | `edit_apply` { SetKeyframes } | `stampKeyframe`/`removeKeyframe`/`commitMoveVolumeKeyframe`/`setInterpolation` |
-| 加文字 | `edit_apply` { AddTexts } | `addTextClip` (ToolbarView:39) |
-| 加字幕 | `edit_apply` { AddCaptions } | CaptionTab 生成 |
-| Link / Unlink | `edit_apply` { Link / Unlink } | `linkClips`/`unlinkClips` (:840-848) |
-| 轨道 mute/hide/sync/高度 | `edit_apply` { SetTrackProps } | `toggleTrackMute/Hidden/SyncLock`/`setTrackHeight` (TimelineHeaderView) |
-| 删轨 | `edit_apply` { RemoveTracks } | `removeTracks` |
-| 文件夹 建/移/重命名/删 | `edit_apply` { CreateFolder/MoveToFolder/... } | EditorViewModel+Folders |
-| Undo / Redo | `undo` / `redo`（或 `edit_apply{Undo/Redo}`）| `undo:`/`redo:` (ToolbarView:79-85) |
-| Copy / Paste clip | `clip_copy` / `clip_paste`{trackIndex,frame} | `copySelectedClipsToClipboard`/`pasteClips` |
-| 工程 新建/打开/保存/另存 | `project_new`/`project_open`/`project_save`/`project_save_as` | NSDocument (MainMenu) |
-| 导入媒体 | `import_media`{urls} | `importMedia` |
-| 导出 | `export_start`{preset} | `showExportDialog`→导出 |
-| seek(播放头) | `seek`{frame, mode} | `seekToFrame` (EditorViewModel:259-267) |
-| 播放/暂停 | `play`/`pause`/`toggle_playback` | `togglePlayback` (:227-233) |
-| 改工程设置(fps/分辨率/宽高比) | `set_timeline_settings`{fps,width,height} | `applyTimelineSettings` (PreviewContainerView:160) |
-| 截帧到媒体 | `capture_frame` | `captureCurrentFrameToMedia` (:117) |
-| Swap/Save as Media | `swap_media`/`save_clip_as_media` | `beginMediaSwap`/`saveClipAsMedia` |
-| 读时间线 | `get_timeline` → Timeline + version | (镜像同步用) |
-| 读媒体库 | `get_media` → assets/folders | (镜像同步用) |
-| relink 离线 | `relink_asset`{id,url} / `relink_folder`{url} | `relinkAsset`/`relinkOfflineAssets` (PreviewContainerView:367-390) |
-
-> `edit_apply` 返回 `EditResult`{changed, action_name, affected_clip_ids, timeline_version, summary}（ARCHITECTURE §5）。前端据 `changed/timeline_version` 决定是否重取。
-
-### 11.2 事件（listen）—— Rust → 前端推送
-
-| event | payload | 前端处理 |
+全部前端字面量 invoke 名由 `api.commandContract.test.ts#frontend_command_names_match_invoke_handler` 与 Rust 注册表比对。安全的自包含 bundle 导出尚未完成 Rust 持有的目标选择/披露流程，因此 UI 不提供该选项，`exportBundle` 能力门会明确拒绝，不会伪造成功或调用未注册命令。
+
+### 11.2 事件（listen）
+
+| event | 核心载荷/语义 | 前端处理 |
 |---|---|---|
-| `timeline_changed` | `{ version: u64 }` | 若 version > 本地 → `get_timeline` 重取镜像 → 触发重绘（对应上游 `timelineRenderRevision` 自增→刷新，`EditorViewModel.swift:27-29,304-312`）|
-| `preview_frame` | 帧数据(纹理/位图引用 或 共享内存句柄) | 上屏到 `PreviewCanvas`（对应上游 `videoEngine` 帧回调）|
-| `playhead_changed` | `{ frame }` | 播放时更新 `activeFrame`（上游 playheadState 由 engine 推进）|
-| `media_changed` | `{}` 或增量 | 重取 `get_media`（缩略图/波形就绪、导入完成、生成完成）|
-| `media_thumbnails` | `{ assetId, sprite/samples }` | 更新 timeline clip 缩略图/波形缓存（上游 `MediaVisualCache`）|
-| `generation_progress` | `{ assetId, status, ... }` | 更新生成中 overlay / 失败态 |
-| `export_progress` | `{ progress, ... }` | 导出进度 UI |
-| `settings_mismatch` | `{ ... }` | 弹导入设置不匹配对话框（上游 `pendingSettingsMismatch`，`EditorViewModel.swift:221`）|
+| `timeline_changed` | `{ kind, projectEpoch, version }` | 刷新不低于事件版本的权威快照 |
+| `project_opened` | `{ kind, path, projectEpoch, version }` | 原子切换工程 identity 后刷新 |
+| `media_changed` | `{ kind, projectEpoch, count }` | 重取工程媒体 |
+| `export://progress` | `{ operationId, done, total }` | 只更新同 operation 的导出进度 |
+| `transcribe://progress`, `search-model://progress`, `search-index://progress` | 各任务进度 DTO | 更新对应任务状态 |
+| `playback://frame` | 带 playback identity 的帧位置 | 仅接收当前 session |
+| `chat://delta`, `chat://tool-call`, `chat://done` | 带 session/turn identity 的流式消息 | 隔离迟到或已取消 turn |
+
+`src-tauri/src/lib.rs#forward_core_event` 负责将每个 `CoreEvent` 转换为同名 Tauri 事件；单个 WebView emit 失败不得中断后续 `EventBus` 观察者。
 
-### 11.3 缩略图 / 波形 / 帧 的传输
+### 11.3 缩略图、波形与预览帧
 
-上游 `MediaVisualCache`(`Timeline/MediaVisualCache.swift`)在内存持 sprite 网格 + PCM 降采样。OpenTake：Rust 媒体层算好（ffmpeg 抽帧 sprite + symphonia 波形），经 `media_thumbnails` event 或专门 command 传给前端（图片用 data-url / blob / 共享内存）。前端缓存后供 TimelineCanvas 的 `drawClip` 使用。**预览帧** `preview_frame` 优先共享内存/零拷贝（WebGL 纹理）以满足 scrub 实时性。
+Rust 媒体层生成波形和 timeline sprite，前端通过 `get_waveform`、`request_timeline_sprite`、`generate_thumbnail`、`preview_poster` 和 `preload_media` 按需取得并缓存。复合预览通过 `composite_frame`；持续播放通过 playback engine 的环回传输，不使用已废弃的 `preview_frame` 大块 event 契约。
 
-### 11.4 命令节流（复刻上游 debounce）
+### 11.4 命令节流与提交
 
-上游对快速重建做合并（`notifyTimelineChangedDebounced` 120ms，`EditorViewModel.swift:315-324`），对 scrub 用 `interactiveScrub` 模式只更 `playheadState` 不提交（`:261-265`）。前端：scrub/拖拽过程中**本地乐观更新 UI 态**（playhead、ghost），**松手才发 `edit_apply`**；连续属性拖拽（ScrubbableNumberField onChanged）可节流或仅在 onCommit 发命令。
+Scrub 和拖拽过程只改 playhead/ghost 等 UI 态；松手时提交一次 `edit_apply`。连续属性控件在 commit 边界合并。命令成功后仍以 Rust 快照为准，不将本地乐观状态当成已提交时间线。
diff --git a/docs/specs/frontend/13-implementation.md b/docs/specs/frontend/13-implementation.md
index ad89be90..cfde5726 100644
--- a/docs/specs/frontend/13-implementation.md
+++ b/docs/specs/frontend/13-implementation.md
@@ -17,8 +17,10 @@
 ### 13.2 1:1 验收清单（逐项打勾）
 
 **A. 视觉（截图对拍，1600×1000）**
-- [ ] 五面板布局(default/media/vertical)的分栏比例、沟槽 5px、surface 圆角 6px、焦点环与上游一致。
+- [x] 五面板布局(default/media/vertical)的分栏比例、沟槽 5px、surface 圆角 6px、焦点环与上游一致。
 - [ ] 所有间距/字号/圆角/颜色取自令牌且与 §1 数值一致（抽查每面板 ≥5 处）。
+
+代码门禁已完成：完整表/CSS 投影和六表面代表值审计已自动化，所有生产组件的未定义 CSS 变量会直接使测试失败。此项保持未勾选，直到打包应用在固定视口/缩放/语言下完成逐面板实机取证。
 - [ ] Toolbar 按钮图标/分隔/缩放滑块(对数)外观一致。
 - [ ] 时间线:刻度间隔/次刻度/标签、轨道头(色条/标签/三图标/区分隔粗线)、clip(底色/左色条/标签/trim 手柄/波形/缩略图/音量橡皮筋/淡变/关键帧菱形)、playhead(红线+下三角)、磁吸黄虚线、marquee 白虚线、新轨黄线、razor 橙虚线 —— 逐项与上游同。
 - [ ] Inspector 四态、tab 下划线、AI Edit 渐变、各字段、关键帧泳道一致。
@@ -32,7 +34,11 @@
 - [ ] §9.4 razor/split/关键帧/淡变/音量全 8 条。
 - [ ] §9.5 playhead/scrub/缩放全 9 条（含光标锚定缩放、灵敏度常量）。
 - [ ] §9.6 快捷键全表逐键。
+
+代码门禁已完成：完整快捷键表由 `DOCUMENTED_SHORTCUT_ROWS`、`resolveDocumentedShortcut`、`APPLICATION_MENU_SPEC` 和两个 owning tests 共同约束，覆盖修饰键冲突、焦点/弹窗/只读态、repeat 与语义命令。此项保持未勾选，直到打包应用按表逐键完成实际验证并留存结果。
 - [ ] §9.7 hover/游标全表。
+
+代码门禁已完成：跨组件矩阵覆盖 enabled/disabled/active/dragging/focus 与完整时间线 cursor 投影，并验证 Transform/Crop/SplitPane/数字字段/图标按钮的语义状态。此项保持未勾选，直到打包应用完成鼠标、触控板、键盘及高对比度实际验证。
 - [ ] §9.8 右键菜单项与分组逐字（§5.10）。
 
 **C. 几何（单测）**
@@ -41,9 +47,28 @@
 - [ ] 磁吸 findSnap（含黏滞 1.5×、playhead 1.5× 阈值）行为一致。
 
 **D. 状态/契约**
-- [ ] 镜像只由 `timeline_changed`→`get_timeline` 更新；前端无任何直接改 timeline 的路径。
-- [ ] 每个编辑手势映射到正确 `edit_apply` 命令（§11.1）。
-- [ ] 持久化键（layoutPreset/三面板可见性/keyframes）跨会话保留。
+- [x] 镜像只由 `timeline_changed`→`get_timeline` 更新；前端无任何直接改 timeline 的路径。
+
+Timeline 镜像入口现为 project-identity/version 单调的整快照提交：接受时 clone + deep-freeze，
+旧 epoch/旧版本拒绝；事件承诺版本高于首次快照时会有界重取且绝不发布落后快照。静态检查
+拒绝组件/Store 的 clips/tracks/timing 直接写入，浏览器 fallback 也只通过命令后重取进入同一边界。
+竞态证据见 `sync.test.ts`，只读/隔离证据见
+`commandRouting.test.ts#project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events`。
+- [x] 每个编辑手势映射到正确 `edit_apply` 命令（§11.1）。
+
+验收证据：`editActions.ts#EDIT_GESTURE_COMMAND_MATRIX` 穷举全部 41 个请求变体；
+`commandRouting.test.ts#every_edit_action_emits_exact_edit_request` 验证 action 的精确 DTO、
+no-op 与无直接镜像写入；`api.editApply.test.ts#edit_apply_forwards_exact_command_envelope`
+覆盖生产 IPC；Rust `commands.rs#every_frontend_edit_request_deserializes_to_intended_command`
+验证所有 camelCase DTO 到预期 `EditCommand` 的路由。
+- [x] 持久化键（layoutPreset/三面板可见性/keyframes）跨会话保留。
+
+持久化契约使用逐字段、带 schema 版本的键：`opentake.ui.v1.layoutPreset`、
+`opentake.ui.v1.agentPanelVisible`、`opentake.ui.v1.mediaPanelVisible`、
+`opentake.ui.v1.inspectorPanelVisible`、`opentake.ui.v1.keyframesPanelVisible`。首次读取时仅迁移
+通过严格校验的旧版无前缀键；非法/损坏值回落到 default / false / true / true / false，且不把
+损坏值写入新 schema。localStorage 不可用、读取抛错或写入失败时不得阻止当次 UI 更新。只持久化
+这五项全局 UI 偏好；工程 view、播放头、选择、最大化等工程/会话态在新 store 中必须恢复默认。
 
 ### 13.3 关键陷阱备忘（防止 1:1 偏差）
 
diff --git a/docs/specs/frontend/2-layout.md b/docs/specs/frontend/2-layout.md
index d8d22166..3f5e865d 100644
--- a/docs/specs/frontend/2-layout.md
+++ b/docs/specs/frontend/2-layout.md
@@ -84,6 +84,12 @@
 - **最大化**:聚焦面板 + 反引号键 `` ` ``（无修饰键）→ `maximizedPanel`（`MainMenu.swift:118-120`,`EditorWindowController.swift:123-128`）。最大化时折叠所有兄弟,Esc 退出（`EditorWindowController.swift:152-155`）。前端等价:把目标面板 grid 区域扩满,其余 `display:none`。
 - 折叠用动画(`item.animator().isCollapsed`,`EditorView.swift:164-166`)→ CSS 宽/高过渡。
 
+OpenTake 的每个叶面板以本地化名称暴露为 accessibility region；分隔条以
+`separator` 暴露当前像素位置，支持鼠标拖拽以及方向键每次 10px、Home/End 到边界。
+这为拖拽提供了完整键盘替代，同时保留上游 5px 命中区。Vertical 预设折叠 Inspector
+时不保留空白分栏，Media 占满左上区域；Media 和 Inspector 都折叠时该区域为空，Preview
+和 Timeline 仍不可折叠。最大化只渲染聚焦叶面板，Escape 恢复原预设。
+
 ### 2.8 窗口 chrome / 标题栏（`Editor/TitleBarView.swift`，窗口尺寸 `AppTheme.swift:231-237`）
 
 Tauri 自定义标题栏区域：
@@ -102,3 +108,16 @@ Tauri 原生菜单（macOS）/ 应用内菜单（Win/Linux）需复刻以下项
 - **Help**：Tutorial / Keyboard Shortcuts(⌘?) / MCP Instructions / Send Feedback…
 
 菜单项勾选态:layout 三项、三个面板可见性、最大化态都带 checkmark/state(`EditorWindowController.validateMenuItem`,`EditorWindowController.swift:270-303`)。
+
+OpenTake 的跨平台应用内 `ViewMenu` 是 **View 组命令的单一所有者**：按上表顺序提供
+Media / Inspector / Agent、最大化聚焦面板、三种布局和全屏共八项。菜单每次打开时从真实
+store/宿主窗口同步勾选态；无聚焦面板时仅“最大化聚焦面板”禁用。折叠当前聚焦或最大化的
+可折叠面板时，焦点回落到 timeline 并退出最大化，避免留下指向不可见面板的状态。鼠标命令
+与 `⌘/Ctrl` 快捷键复用同一组 store actions；打开菜单后焦点进入第一项，方向键/Home/End
+遍历可用项，Esc 关闭并把焦点还给菜单按钮。
+
+打包后的桌面应用同时安装完整原生 App / File / Edit / View / Help 菜单。原生菜单与应用内
+入口复用同一 action，不复制业务逻辑；enabled、checked 与中英文文本均从 store 实时同步。
+尚未交付的检查更新、教程、反馈入口保留可见但明确标记 Beta 暂不可用并禁用。Save As 必须
+先完成 Core 原子发布，成功后才切换当前工程路径和最近项目；失败时原路径、dirty 状态与最近
+项目保持不变。
diff --git a/docs/specs/frontend/3-components.md b/docs/specs/frontend/3-components.md
index e29fd9f7..8051222c 100644
--- a/docs/specs/frontend/3-components.md
+++ b/docs/specs/frontend/3-components.md
@@ -8,7 +8,7 @@ AppShell (Tauri window chrome)
 │   ├─ TitleBarLeading      ← TitleBarView.swift:3  (Agent 切换)
 │   └─ TitleBarTrailing     ← TitleBarView.swift:22 (Export, Avatar)
 └─ EditorSplit              ← EditorView / EditorSplitViewController
-    ├─ AgentPanel           ← AgentPanelView      (另一 Issue,占位)
+    ├─ AgentPanel           ← AgentPanelView      (实时会话、生成确认与草稿交接)
     └─ PresetRoot           ← buildDefault/Media/VerticalLayout
         ├─ MediaPanel       ← MediaPanelView.swift
         ├─ PreviewContainer ← PreviewContainerView.swift
@@ -35,6 +35,7 @@ AppShell (Tauri window chrome)
 | `SnapIndicatorOverlay` | `SnapIndicator` | zIndex 90,虚线 | 拖拽时显隐 |
 | `ClipGeneratingOverlay` | `ClipGeneratingOverlay` | 覆盖在 clip rect 上 | 生成中动画 |
 | `InspectorView` | `Inspector` | 标题栏 + tab + 滚动内容 | tab 切换、字段编辑 |
+| `AIEditView` | `AiEditTab` | Inspector 的 AI Edit tab | 生成建议、审阅、拒绝、一次命令应用、撤销/取消/失败恢复 |
 | `ScrubbableNumberField` | `ScrubbableNumberField` | 行内 | 拖拽改值/点击输入 |
 | `InspectorPositionFields` | `PositionFields` | 行内双字段 | X/Y 拖拽 |
 | `KeyframesPanel`/`KeyframesLane` | `KeyframesPanel` | Inspector 右半 | 关键帧 ruler+lane 拖拽/右键 |
@@ -43,13 +44,28 @@ AppShell (Tauri window chrome)
 | `AssetThumbnailView` | `AssetTile` | grid cell | 拖到时间线、双击、右键 |
 | `FolderTileView` | `FolderTile` | grid cell | 双击进入、拖入、重命名 |
 | `CaptionTab` | `CaptionTab` | 表单 + 预览 | 字幕生成参数 |
-| `MusicTab` | `MusicTab` | 列表/生成 | 音乐选取/生成 |
+| `MusicTab` | `MusicTab` | 项目音乐 + 全局音乐库 + 生成入口 | 搜索、导入、放入时间线；生成前把模型/成本确认草稿交给 Agent |
+| `TransitionTab` | `TransitionTab` | 相邻可视片段切点编辑器 | 交叉溶解、时长钳制、应用/移除、撤销；时间线显示切点标记 |
 | `PreviewContainerView` | `PreviewContainer` | tab栏 + 画布 + scrub + transport | 见§8 |
 | `PreviewView`/`TransformOverlayView`/`CropOverlayView` | `PreviewCanvas`+`TransformOverlay`+`CropOverlay` | 画布层叠 | 拖动变换/裁剪手柄 |
 | `CapsuleButtonStyle` | `CapsuleButton` | —— | hover/press |
 | `HoverHighlight` | `useHoverHighlight`/`<HoverArea>` | —— | hover 背景渐显 |
 | `GeneratingOverlay` | `GeneratingOverlay` | 覆盖 | 生成中 |
 
+### 3.2.1 当前精确所有权与实时边界
+
+以下条目是本组件地图的可执行所有权索引。组件不能维护第二套编辑状态；所有持久化编辑都进入共享命令链，预览与导出读取同一项目模型。
+
+| 能力 | 精确 React 所有者 | 实时命令/状态边界 | 可见验收所有者 |
+|---|---|---|---|
+| AI Edit 建议与审阅 | `AiEditTab` → `web/src/components/inspector/AiEditTab.tsx` | `edit.setClipProperties` / `edit.undo`；AbortSignal 取消不提交命令 | `AiEditTab.test.tsx`、`Inspector.test.tsx` |
+| 音乐浏览、导入与放置 | `MusicTab` → `web/src/components/media/MusicTab.tsx` | `addMediaToTimeline`、`libraryStore.importToProject`、`chatStore.composerDraft` | `MusicTab.test.tsx` |
+| 转场选择与应用 | `TransitionTab` → `web/src/components/media/TransitionTab.tsx` | `setTransition` → Tauri `edit_apply` → Rust `EditCommand::SetTransition` | `TransitionTab.test.tsx`、`timelineOverlays.test.ts` |
+| 画布变换覆盖层 | `TransformOverlay` → `web/src/components/preview/TransformOverlay.tsx` | `edit.setClipProperties`（一次指针提交对应一次撤销项） | `TransformOverlay.test.tsx` |
+| 画布裁剪覆盖层 | `CropOverlay` → `web/src/components/preview/CropOverlay.tsx` | 静态裁剪用 `edit.setClipProperties`；动画裁剪用 `edit.upsertKeyframe` | `cropOverlay.test.ts`、`Preview.test.tsx` |
+
+转场模型由 `crates/opentake-domain/src/transition.rs` 持久化；命令验证、相邻关系清理与撤销由 `crates/opentake-ops/src/command.rs` 所有；交叉溶解的预览/导出帧计划由 `crates/opentake-render/src/plan/build.rs` 所有。这样 UI 标记、保存重开、预览和导出不会各自形成不一致的旁路。
+
 ### 3.3 SF Symbol → 前端图标映射（逐处复刻；用统一 SVG 图标集）
 
 > 上游用 SF Symbols。前端选一套**视觉接近 SF 的图标集**（推荐 Lucide，缺的用 Phosphor/自绘）。下表给出**用到的 symbol** → 推荐替代 + 用处。命名以 Lucide 为例。
diff --git a/docs/specs/frontend/9-interactions.md b/docs/specs/frontend/9-interactions.md
index 1d7483c7..4eea9822 100644
--- a/docs/specs/frontend/9-interactions.md
+++ b/docs/specs/frontend/9-interactions.md
@@ -99,6 +99,8 @@
 
 > **跨平台键位**:macOS ⌘ → Win/Linux Ctrl;⌥ → Alt。Tauri 下用 `accelerator` 字符串复刻。keyCode 是 macOS 物理键码,前端用 `event.code`(如 `Space`/`KeyC`/`BracketLeft`/`Backquote`/`ArrowLeft`)更可靠,**逐键对照上表语义**。
 
+**OpenTake 代码门禁（2026-08-01）**:`resolveDocumentedShortcut` 是本表唯一的 WebView 物理键解析边界，按表输出语义命令；`APPLICATION_MENU_SPEC` 继续作为原生菜单 accelerator 与同一动作的声明边界。矩阵已覆盖 macOS/Windows 修饰键、`⌘S`/`⌘⇧S` 冲突、Space 修饰/重复、媒体与时间线方向键、输入控件、弹窗、只读工程及 Home/no-editor no-op。`useKeyboardShortcuts` 只执行解析结果，并对一次性命令抑制 repeat。代码测试与生产构建已通过；本表最终勾选仍须完成打包桌面端逐键取证。
+
 ### 9.7 Hover / 焦点 / 游标态
 
 | 元素 | hover 效果 | 来源 |
@@ -113,6 +115,8 @@
 | scrub 条 | `pointingHand` + 变粗 | `PreviewContainerView.swift:655,677` |
 | 数字字段 | `resizeLeftRight`（ew-resize）| `ScrubbableNumberField.swift:185-187` |
 
+**OpenTake 代码门禁（2026-08-01）**:`timelineInteractionCursor` 统一投影刻度/Shift-range、trim、clip body、razor、move/scrub/trim/marquee drag 与只读禁用态；Transform/Crop、SplitPane、ScrubbableNumberField 和 HoverButton 的 enabled/disabled/dragging/focus 状态由同一 owning matrix 校验。数字字段同时暴露 spinbutton 语义与键盘增减/进入编辑路径，禁用 hover 不再着色。代码测试与生产构建已通过；鼠标、触控板、键盘焦点、高对比度的打包桌面快照仍是最终勾选前置。
+
 ### 9.8 右键菜单（汇总，见 §5.10 详表）
 
 时间线 clip / 空白 / range / 淡变拐点 / 音量 kf / 关键帧泳道，菜单项逐字照搬（`TimelineView.swift:641-799` + `KeyframesLane.swift:contextMenu`）。Media 面板资产/文件夹右键（`MediaTab` 各处）。
diff --git a/docs/specs/media/0-principles.md b/docs/specs/media/0-principles.md
index a563a638..c8d34a60 100644
--- a/docs/specs/media/0-principles.md
+++ b/docs/specs/media/0-principles.md
@@ -7,6 +7,19 @@
 3. **缓存键与磁盘格式逐字节复刻**:`SHA256("path|mtime_unix_f64|size")` 取前 N hex、`PALMEMB1` 二进制布局、`.waveform`/`.thumbs.jpg`+`.thumbs.json` sidecar、转写 JSON。理由:让 OpenTake 与上游/旧工程的缓存目录**可互读**(同机迁移),并保证幂等判定一致。
 4. **错误用 `thiserror` 定义本 crate 错误,内部传播用 `anyhow`,边界返回 `Result<T, MediaError>`**;`opentake-domain` 零依赖,本 crate 是第一层允许 IO 的 crate。
 5. **不可变 / 纯函数优先**:排名(`VisualSearch`)、波形降采样、采样判定、转写过滤等都是无副作用纯函数,可全单测;有状态的只有索引调度器(§7.7)与模型加载器(§5.6)。
-6. **后端推理可插拔**:`Embedder` / `Transcriber` / `OrtWorker` 定义为 trait,默认实现走 ort;测试注入 mock(协议化 DI)。candle 只作为可选回退后端存在。
-7. **导出期让路**:任何后台任务(索引/缩略图/波形)在导出活跃时暂停。证据:上游 `ExportService.isExporting.didSet → SearchIndexCoordinator.exportDidBegin/End`(`MODULE-PORT-MAP` L457)、`SearchIndexCoordinator.waitWhileExportActive`(`SearchIndexCoordinator.swift:49`)。
+6. **后端推理可插拔**:`Embedder` / `Transcriber` / `OrtWorker` 定义为 trait；启用相应 feature 时使用 ORT/whisper.cpp，测试注入 mock（协议化 DI）。当前没有可调用的 candle 后端，不得把规划中的回退实现写成已交付能力。
+7. **导出期让路**:`ExportPause` 提供引用计数式压力信号；生产队列是否真正让索引/转写/缩略图/波形暂停，必须由运行期协调器的拥有测试证明，不能只凭该原语宣称完成（生产队列收口由同计划 Task 32 独立负责）。
 8. **L2 归一化对齐风险**:上游裸点积 `cblas_sgemv` 是否等价余弦,取决于导出模型是否在图内 L2 归一化(`MODULE-PORT-MAP` L860)。本 crate **必须复用上游同一份权重转 ONNX**,并在 `Embedder::encode` 后做一次**条件 L2 归一化开关**(`Spec.normalized: bool`),默认 false 以匹配上游(模型内已归一化)——除非验证证明需要外部归一化。
+
+## 可执行子能力集合
+
+本标题是合规/验收集合，不是一个额外的“大功能”。它只在下列独立所有者都通过时成立：
+
+- `crates/opentake-media/tests/ffmpeg_integration.rs#probe_reports_dimensions_fps_and_audio`：本地固定素材的尺寸、帧率和音轨探测。
+- `crates/opentake-media/tests/ffmpeg_integration.rs#decode_frame_returns_rgba_of_expected_size`：秒制 IO 边界上的真实 RGBA 解码。
+- `crates/opentake-media/tests/ffmpeg_integration.rs#extract_pcm_yields_16k_mono`：确定的 16 kHz 单声道 PCM 边界。
+- `crates/opentake-media/tests/ffmpeg_integration.rs#waveform_has_expected_bucket_count`：命名常量驱动的波形桶数量。
+- `crates/opentake-media/tests/ffmpeg_integration.rs#encode_roundtrip_produces_playable_video`：真实编码、探测和可播放容器往返。
+- `crates/opentake-media/src/index_coordinator.rs#export_pause_ref_counts`：嵌套导出压力的引用计数原语；这不替代 Task 32 的生产队列验证。
+
+配套纯函数/磁盘拥有测试继续分别锁定 `cache_key`、`waveform::store`、`thumbnail::sprite`、`search::embed_store`、转写缓存和条件 L2 归一化。跨平台路径、网络、许可证与隐私边界见 [`9-domain-contract.md`](9-domain-contract.md)；任一子项失败时，本标题不得作为完成证据。
diff --git a/docs/specs/media/10-acceptance.md b/docs/specs/media/10-acceptance.md
index 28ca15dd..9cf853d3 100644
--- a/docs/specs/media/10-acceptance.md
+++ b/docs/specs/media/10-acceptance.md
@@ -24,8 +24,8 @@
 - **T8.7 VisualSearch 排名**:矩阵·向量、best-per-shot(同分保留先出现)、minScore 过滤、`prefix(limit)` 再 `filter(floor)` 顺序、top≤0 空。验收:构造已知向量集断言命中顺序/去重/截断边界与上游 `VisualSearch.search` 逐用例一致(尤其「先 limit 后 floor」最终 ≤ limit)。
 - **T8.8 VisualIndexer**:视频 shot 累积(首镜头起点强制 0、shotEnd=下一镜头起点/末镜头=duration)、图片单 embedding 零长 shot、needsIndex 幂等、导出让路 + 取消。验收:对已知镜头视频断言 rows 的 `shot_start/shot_end`;重复 index 跳过(幂等);取消中途 `Cancelled`。
 - **T8.9 ModelDownloader**:reqwest 流式下载 + 加权进度 + 流式 SHA256 + zip 解压(单顶层条目)+ 原子安装 + 幂等。验收:mock HTTP 下载三文件、进度单调到 1、错校验和→`Checksum`、安装目录结构正确、二次 install 直接返回。
-- **T8.10 ort worker 框架**:`OrtModel::{load,run}`、`OrtWorker::submit`(序列化 + 导出暂停)、`OrtModelRegistry` 懒加载、EP 回退 CPU、tensor 辅助。验收:加载 SigLIP image encoder 跑通(即 `OrtEmbedder` 复用它);EP 不可用回退 CPU 有日志;worker 串行执行、导出暂停期间不取模型。
-- **T8.11 IndexCoordinator**:schedule 条件、单 worker、dequeue 跳过失效 id、index_one 进度分配(转写 0.5)、并发转写+视觉、failed 集、search 快照 off-thread、ExportPause 引用计数 + 2s 轮询。验收:入队/去重/失败重试(failedIds 仅批内去重)行为与上游一致;导出 begin 后 worker 暂停、end 后恢复;search 空 query 返回空、命中合理。
+- **T8.10 ort worker 框架**:`OrtModel::{load,run_f32}`、固定容量 `OrtWorker::submit`、typed request/state/result/error、`OrtModelRegistry` 懒加载、EP 平台选择、tensor 辅助。验收由 owning stress test 证明:worker count 恒为 1；priority 内 FIFO；连续 4 个 interactive 后 background 不饥饿；容量满返回 `QueueFull`；排队/运行取消、model error 与 panic 都有终态且下一 job 恢复；shutdown 后 active=0。
+- **T8.11 生产 IndexCoordinator**:`search_index_start` 的 owned manifest snapshot 进入进程唯一 worker；source fingerprint + SigLIP model/version 组成 live job identity，重复提交共享结果。`index_assets` 串行处理需更新的视觉索引与无缓存转写，每个素材边界响应 `ExportPause`/取消；embedding 原子提交、transcript fingerprint cache 使 source 变化失效，重启 sweep 跳过完成项并续作缺失项。验收:嵌套压力仅在最后 guard drop 后恢复；容量/FIFO/防饥饿/去重/失败重试/模型升级/重启/终态矩阵全绿；空 query 仍返回空且普通 Files/Spoken fallback 不依赖视觉模型。
 
 ## 持续校准(非阻塞,跨 Phase)
 
diff --git a/docs/specs/media/2-ffmpeg.md b/docs/specs/media/2-ffmpeg.md
index 6c9ba9b3..718126fd 100644
--- a/docs/specs/media/2-ffmpeg.md
+++ b/docs/specs/media/2-ffmpeg.md
@@ -1,5 +1,26 @@
 # ffmpeg-sidecar:解码 / 编码 / 缩略图(seek 解帧)/ 抽 PCM
 
+## 2.0 发布包中的可验证侧车
+
+- macOS（Apple Silicon / Intel）和 Windows x64 的 `ffmpeg` / `ffprobe`
+  由 `scripts/provision_ffmpeg_sidecars.py` 依据
+  `scripts/ffmpeg-sidecars.lock.json` 的固定 URL、实测版本和 SHA-256 供应；
+  下载断线、版本不符或校验不符均终止打包。
+- `tauri.macos.conf.json` / `tauri.windows.conf.json` 通过 Tauri `externalBin`
+  把目标三元组后缀的两个侧车放在应用可执行文件旁。发布包运行时
+  只使用这两个普通文件；侧车缺失时保留预期的同目录路径并返回 FFmpeg
+  错误，不回退到开发者 `PATH`。
+- Debug/测试运行仍可用 `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE`
+  显式覆盖；打包运行时同目录侧车优先且会覆盖环境注入。
+- 所有发布候选包都必须运行
+  `scripts/tests/packaged-sidecars-test.rb#packaged_macos_windows_sidecars_resolve_and_execute`：
+  在清空 `PATH` 的环境中对供应文件和安装后文件分别执行版本、探测、单帧
+  RGBA 解码和编码回探。Windows CI 必须静默安装 NSIS 后执行该门；
+  macOS 候选 `.app` 亦从 `Contents/MacOS` 执行同一门。
+
+二进制来源与许可说明随包放在 `resources/ffmpeg/SOURCE.md`，OpenTake
+与该 FFmpeg 分发均使用 GPL 兼容条款。
+
 ## 2.1 媒体探测 `MediaProbe`(替 `MediaAsset.loadMetadata` 的视频/音频分支)
 
 上游 `MediaAsset.loadMetadata`(`MediaAsset.swift:96-162`)用 AVFoundation 读:时长(优先 video track timeRange,否则 asset duration)、`naturalSize.applying(preferredTransform)` 校正后的像素宽高、`nominalFrameRate`、是否有音轨。Rust 用 ffprobe 等价。
diff --git a/docs/specs/media/7-ort-worker.md b/docs/specs/media/7-ort-worker.md
index 79a84d0a..34b9e8b7 100644
--- a/docs/specs/media/7-ort-worker.md
+++ b/docs/specs/media/7-ort-worker.md
@@ -17,61 +17,56 @@ impl OrtModel {
     pub fn run(&self, inputs: &[(&str, TensorRef<'_>)]) -> Result<HashMap<String, OwnedTensor>>;
 }
 
-pub enum ExecutionProvider { Cpu, CoreML, Cuda, DirectMl, Tensorrt } // 按平台可用性回退到 Cpu
+pub enum ExecutionProvider { Cpu, CoreML, Cuda, DirectMl, Tensorrt } // Windows 使用纯 Rust tract Cpu；其他平台按可用性回退 Cpu
 ```
 
 ## 7.2 worker(序列化 GPU/重负载,导出期让路)
 
 ```rust
-/// 单后台执行器:把推理任务排队,序列化访问昂贵 EP,导出活跃时暂停(与 §7.7 共享暂停信号)。
-pub struct OrtWorker { /* tokio mpsc + 单 worker */ }
+/// 固定容量 admission channel + 一个专用线程；不随调用数增加 worker。
+pub struct OrtWorker { /* sync_channel + one worker + live-key dedupe */ }
 impl OrtWorker {
-    pub fn spawn(export_pause: ExportPause) -> Self;
-    pub async fn submit<F, T>(&self, job: F) -> Result<T>
-        where F: FnOnce(&OrtModelRegistry) -> Result<T> + Send + 'static, T: Send + 'static;
+    pub fn spawn(export_pause: ExportPause, capacity: usize) -> Self;
+    pub fn submit<T, F>(&self, request: JobRequest, job: F)
+        -> Result<JobHandle<T>, WorkerError>;
+    pub fn active_jobs(&self) -> usize;
+    pub fn shutdown(&self) -> Result<(), WorkerError>;
 }
-pub struct OrtModelRegistry { /* 按 key 懒加载并缓存 OrtModel,避免重复 load */ }
+pub enum JobState { Queued, Running, Cancelled, Completed, Failed }
+pub enum JobPriority { Background, Interactive }
+pub struct JobRequest { kind: JobKind, model_identity: String,
+                        dedupe_key: String, priority: JobPriority }
+pub struct OrtModelRegistry { /* 按 model_identity 懒加载并缓存，避免重复 load */ }
 ```
+- **有界与顺序**:`try_send` 在容量满时返回 typed `QueueFull`；每个优先级内部按单调 sequence FIFO，连续 4 个 interactive 后强制服务一个 background，给出明确的 starvation bound。
+- **取消与终态**:`JobHandle` 暴露 `state/cancel/wait/wait_until_running`；排队和运行中取消都收敛到 `Cancelled`。job error、model error 与 panic 收敛到 `Failed`，worker 捕获 panic 后继续服务下一项；`shutdown` 取消队列、join 唯一线程并保证 `active_jobs()==0`。
+- **去重与结果**:同一 live `dedupe_key` 返回同一 shared typed result，不二次占队列/执行；终态前先移除 live key，因此失败可以立即用同 key 重试。
 - **张量辅助**(`ort_worker/tensor.rs`):`ndarray ↔ ort::Value`、NCHW/NHWC 转换、mean/std 归一、`Array4<f32>` ↔ 图像。SigLIP 预处理(§5.2)即复用这里。
-- **EP 回退**:首选平台 EP(CoreML/CUDA/DirectML),不可用回退 CPU,日志 `tracing::warn`。
+- **EP 回退**:macOS 首选 CoreML；Linux 使用 CPU；Windows 使用不依赖原生 DLL 的纯 Rust tract CPU 后端。
 - **复用点**:`OrtEmbedder`(§5.7)内部即一个 `OrtModel`(image)+ 一个 `OrtModel`(text);进阶特性各自定义自己的预处理/后处理,共用 `OrtModel::run` + `OrtWorker` 调度。
 
 > 本 crate 只交付**框架 + SigLIP2 使用者**;具体进阶模型(Real-ESRGAN 等)在各自 Phase 8+ PR 落地,复用本接口。记此以明确「worker 通用接口」的交付边界 = §7.1/§7.2 + 至少一个真实使用者(SigLIP2)。
 
 ## 7.3 后台索引/转写调度 `IndexCoordinator`(替 `SearchIndexCoordinator`)
 
-`Search/SearchIndexCoordinator.swift` + `MODULE-PORT-MAP` L864/L867。上游是 `@MainActor @Observable`;Rust 用 **tokio 单 worker 队列 + AtomicUsize 导出暂停 + 事件向前端推进度**(MODULE-PORT-MAP L881 (6))。**注意:UI 状态(进度/`@Observable`)属上层**;本 crate 提供调度内核 + 进度回调,UI 镜像在 `opentake-core`/前端。
+`Search/SearchIndexCoordinator.swift` + `MODULE-PORT-MAP` L864/L867。上游是 `@MainActor @Observable`;Rust 的生产拥有者是 Tauri `search_index_start` + `index_assets`，通过上面的固定容量单 worker、共享 `ExportPause` 和 `search://index` 事件实现。同步 Tauri 命令在调用线程等待 typed handle，真正的重负载只在唯一专用 worker 执行，重复命令共享结果而不是启动第二次索引。
 
 ```rust
 // index_coordinator.rs
-#[derive(Clone)] pub struct ExportPause(Arc<AtomicUsize>); // 引用计数,跨窗口
+#[derive(Clone)] pub struct ExportPause(Arc<ExportPauseInner>); // 引用计数+Condvar,跨窗口
 impl ExportPause {
     pub fn begin(&self); pub fn end(&self);      // exportDidBegin/End(:46-47)
     pub fn is_active(&self) -> bool;             // exportActive(:45)
-    pub async fn wait_while_active(&self);       // 每 2s 轮询(:49-53)
-}
-
-pub struct IndexCoordinator { /* queue, failed set, single worker, loaded_indexes cache */ }
-impl IndexCoordinator {
-    pub fn new(export_pause: ExportPause, embedder: Arc<dyn Embedder>,
-               transcriber: Arc<dyn Transcriber>, cache_root: PathBuf) -> Self;
-
-    /// 入队需要(重)索引的素材(视觉 needsIndex 或 转写无磁盘缓存)。
-    pub fn schedule(&self, asset: &opentake_domain::media::MediaAsset);
-    pub fn sweep(&self, assets: &[opentake_domain::media::MediaAsset]);
-    pub async fn cancel_all(&self);
-
-    /// 查询:快照候选 → off-thread 加载/编码/排名 → 返回 Hit(视觉)。
-    pub async fn search_visual(&self, query: &str, limit: usize,
-        within: Option<&HashSet<String>>, assets: &[MediaAsset]) -> Vec<Hit>;
-
-    pub fn progress(&self) -> IndexProgress; // {batch_total, batch_completed, current_fraction}
+    pub fn guard(&self) -> ExportPauseGuard;     // Drop 自动平衡 end
+    pub fn wait_while_active(&self, cancelled: impl Fn() -> bool) -> bool;
 }
 ```
 逐项对齐(`SearchIndexCoordinator.swift`):
-- **schedule 条件**:enabled 且有 embedder 且 `!asset.is_generating`;id 不在 queue/failed;`needsVisual(video|image 且 VisualIndexer.needs_index)` 或 `needsTranscript(audio|video+hasAudio 且 转写无磁盘缓存)` 成立才入队;`batch_total+=1`;`ensure_worker`(`:107-124`)。
-- **worker**:单个(`tokio::spawn`),`utility` 优先级;循环 dequeue,`export_pause.wait_while_active()` 每 2s 轮询(`:148-160`);`index_one`(`:178-221`)。
-- **index_one**:需转写则视觉占进度 0.5 否则 1.0(`visualShare`,`:181-185`);`async let`/`tokio::join!` 并发跑转写(`TranscriptCache.transcript`)与视觉索引;视觉完成后置 `current_fraction = visualShare` 再 await 转写(`:189-214`)。失败(非取消)记 `failed`(`:217-220`)。
-- **dequeue**:跳过已不存在的 id(`batch_completed+=1`);队列空 `reset_batch` 返回 None(`:162-170`)。
+- **schedule 条件**:`search_index_start` 固化一次 manifest snapshot；视觉只取 `needs_index` 为真者，音频/有音轨视频只取无 fingerprint cache 者。job key 包含 cache root、每个 source fingerprint 与 SigLIP model/version；live duplicate 合并。
+- **worker**:进程内一个 `OrtWorker`，容量 8；`OrtModelRegistry` 以 model/version/models-root 懒加载 SigLIP。每项开始和素材 batch boundary 都检查 cancellation 与 `ExportPause`，最终 holder drop 后 Condvar 立即唤醒（取消最多 20 ms 被观察），不再用 2 s 忙轮询。
+- **index_one**:视觉与自动转写都在同一个 heavy worker 中串行，避免两个模型同时争用 GPU/CPU；单素材失败只记录并继续，取消则终止整个 job。embedding 由原子 store 写入，transcript 由 fingerprint cache 保存；重启重新 sweep，已完成项跳过，未完成项继续。
+- **dequeue**:提交时的 owned snapshot 使项目切换不会混合素材；缺失/离线文件被该轮跳过，下一轮 source identity 变化后可重试。
 - **search**:main 快照候选 `(id,url)` + `loaded_indexes`;off-thread 算 key、命中内存缓存(key 相等)复用否则 `EmbeddingStore::load`、`encode_text(query)`、`VisualSearch::search`;回主合并 `loaded_indexes`;空 query → `[]`(`:225-257`)。
-- **generation 让路**:`exportPause` 跨窗口引用计数(`ExportPauseCounter`,`:37-47`);导出开始/结束由 `opentake-render` 调 `begin/end`(对齐上游 `ExportService.isExporting.didSet`)。
+- **generation 让路**:`ExportPause` 是跨窗口引用计数；播放/导出压力拥有者持有 `guard` 时不启动新 job，运行 job 在下一素材边界让行，嵌套 holder 仅在最后一个离开时恢复。
+
+拥有测试:`search::tests::bounded_single_worker_cancels_skips_stale_and_yields_to_playback_export` 覆盖容量、优先级 FIFO、4-job 防饥饿、live-key 去重、排队/运行取消、model error、panic 后恢复、失败同 key 重试、model registry 单次加载、压力恢复、source/model identity 失效、shutdown 与 restart；`index_coordinator::tests::export_pause_ref_counts` 覆盖嵌套 guard、唤醒与取消。
diff --git a/docs/specs/media/8-coordinator.md b/docs/specs/media/8-coordinator.md
index b161b126..55b516cb 100644
--- a/docs/specs/media/8-coordinator.md
+++ b/docs/specs/media/8-coordinator.md
@@ -12,12 +12,13 @@
 
 ## 8.2 被 `opentake-render` 复用的解码/编码
 
-`opentake-render`(RenderPlan + wgpu 合成 + 双 ffmpeg 后端)**复用本 crate 的**:
-- `decode::frame::{decode_frame_at, decode_frames_at}`(预览/导出取源帧 → 上传纹理)。
+Tauri 的 render/playback/export adapter（调用 `opentake-render` 的 RenderPlan +
+wgpu 合成器）通过 `MediaEngine` **复用本 crate 的**:
+- `MediaEngine::decode_frame` / 批量 flat decoder(预览/导出取源帧 → 上传纹理)。
 - `decode::reader`(顺序解帧迭代器,导出后端逐帧喂合成器)。
-- `decode::pcm::extract_pcm`(导出混音前取各 clip 音频 PCM)。
-- `encode::{VideoEncoder, ExportPreset}`(导出后端把合成 RGBA 帧序列 + 混音编码成容器)。
-- `MediaProbe`(渲染尺寸/源 fps 决策)。
+- `MediaEngine::extract_pcm`(导出混音前取各 clip 音频 PCM)。
+- `MediaEngine::video_encoder` + `ExportPreset`(把合成 RGBA 帧序列 + 混音编码成容器)。
+- `MediaEngine::probe`(渲染尺寸/源 fps 决策)。
 
 **职责切分**(`docs/ARCHITECTURE.md` §1/§6):
 - `opentake-media` = **读取/编码 + 离线分析**(解码到 RGBA、抽 PCM、缩略图、波形、转写、语义索引/搜索、ort worker)。
@@ -27,7 +28,11 @@
 ## 8.3 媒体物化(图片/Lottie → 纹理)的归属
 
 上游用 `ImageVideoGenerator`(图片烧静止视频)、`LottieVideoGenerator`(Lottie 烧 ProRes)、`AlphaVideoNormalizer`(直 alpha 预乘)绕开 AVPlayer 限制。`docs/_analysis/02` 表 L74/L75/L81 与 `docs/ARCHITECTURE.md` §6 L130:**自建 wgpu 合成器后,这三类 hack 整类消失**——图片/Lottie 在合成前**物化为纹理**(content-hash 缓存),由 `opentake-render` 负责。
-- 本 crate **提供**:图片解码 → `RgbaFrame`(§3.2 / `image` crate);(可选)Lottie 解码用 `rlottie` FFI 或 `velato`(`docs/_analysis/02` 表 L81),渲成 `RgbaFrame` 序列。**建议** Lottie 放 render 的物化层或独立 `opentake-motion`(Phase 10),本 crate 仅暴露图片解码;Lottie 列为**有意暂不归本 crate**。
+- 本 crate **提供**:图片解码 → `RgbaFrame`(§3.2 / `image` crate)。三个 Tauri render adapter 共用 `render::LottieMaterializer`:Velato 解析有界 Lottie JSON,Vello 在现有 wgpu 23 设备上按内部帧光栅成预乘 RGBA 纹理;不生成中间视频。
+- 图片键为 `sha256(source bytes)`,Lottie 键为 `sha256(source bytes)+internal frame+texture size`;同路径内容变化不会命中旧纹理。Lottie 内部帧使用 `sourceFrame mod ceil(op-ip)`,因此 preview/playback/export 具有相同循环语义。
+- 生命周期所有权:preview 的 Velato/Vello parser/pipeline 跟 `RenderState::GpuContext` 同生共死,单次 composite 的 `Rc` texture LRU 不进入要求 `Send+Sync` 的 Tauri state;playback LRU 仅归专用 render thread;export LRU 仅归单次 export。preview GPU 错误丢弃完整 context,下一次请求重建设备/pipeline;playback 会话和 export 失败时丢弃它们的本地 context。
+- 失败语义:空文件、超过 8 MiB、画布不在 `1..=4096`、非法帧区间/帧率、解析失败或当前 Velato 不支持的 Lottie 特性都返回明确 materialization error;三个产品路径不得把该层静默当作成功。
+- 拥有测试 `playback::resolver::tests::lottie_cache_lifecycle_frame_modulo_and_preview_export_parity` 用两帧红/绿像素 fixture 证明取模、content-hash 失效、preview/export 字节一致和 context 重建后输出一致。
 - 本 crate **不提供**:静止视频烧制、ProRes 烧制、alpha 预乘转码(整类删除)。
 
 ## 8.4 facade `MediaEngine`(供 `opentake-core` 调用)
@@ -37,21 +42,35 @@
 pub struct MediaEngine {
     cache_root: PathBuf,          // 缩略图/波形/转写/embedding 缓存根(Tauri app_cache_dir)
     models_dir: PathBuf,          // 模型安装根(Tauri app_data_dir)
-    coordinator: IndexCoordinator,
-    transcript_cache: TranscriptCache,
-    ort: OrtWorker,
+    export_pause: ExportPause,    // 与进程唯一 OrtWorker 共用的压力信号
 }
 impl MediaEngine {
     pub fn probe(&self, path: &Path) -> Result<MediaProbe>;
+    pub fn decode_frame(&self, path: &Path, req: &FrameRequest) -> Result<(f64, RgbaFrame)>;
+    pub fn extract_pcm(&self, path: &Path, spec: &PcmSpec,
+                       range: Option<(f64,f64)>) -> Result<PcmBuffer>;
+    pub fn video_encoder(&self, out: &Path, width: u32, height: u32,
+                         fps: i32, preset: &ExportPreset) -> Result<VideoEncoder>;
     pub fn video_thumbnails(&self, path: &Path, dur: f64, cb: Option<&dyn Fn(&[VideoThumb])>) -> Result<Vec<VideoThumb>>;
     pub fn image_thumbnail(&self, path: &Path) -> Result<RgbaFrame>;
     pub fn waveform(&self, path: &Path, dur: f64) -> Result<Vec<f32>>;
-    pub async fn transcribe(&self, path: &Path, is_video: bool, range: Option<(f64,f64)>) -> Result<TranscriptionResult>;
+    pub fn transcribe(&self, path: &Path, is_video: bool, range: Option<(f64,f64)>,
+                      backend: &dyn Transcriber, cache: &TranscriptCache)
+                      -> Result<TranscriptionResult>;
     pub fn search_spoken(&self, query: &str, assets: &[(String, PathBuf)], limit: usize) -> Vec<SpokenHit>;
-    pub async fn search_visual(&self, query: &str, limit: usize, assets: &[MediaAsset]) -> Vec<Hit>;
-    pub fn index_sweep(&self, assets: &[MediaAsset]);
-    pub fn export_pause(&self) -> ExportPause; // 交给 render 在导出期 begin/end
+    pub fn search_visual(&self, query_vector: &[f32], indexes: &[(String, AssetIndex)],
+                         limit: usize, relative_cutoff: f32,
+                         min_score: Option<f32>) -> Vec<Hit>;
+    pub fn export_pause(&self) -> ExportPause;
 }
 ```
 - 错误边界:`MediaEngine` 返回 `Result<_, MediaError>`;`opentake-core` 转 Tauri `Err(String)`(AGENTS.md Rust 风格)。
 - 缓存根/模型根由 core 注入(跨平台路径,替上游硬编码的 `~/Library/...`)。
+- 重模型调度不作为 facade 的伪字段保存：Tauri `search_index_start` 把 owned
+  manifest snapshot 和本 facade 的 `ExportPause` 提交给进程唯一的 bounded
+  `OrtWorker`；worker registry 负责 model identity/lazy load。这样 facade
+  保持同步值类型边界，调度生命周期仍由应用 runtime 拥有。
+- 依赖拥有测试
+  `facade_contract.rs#all_services_are_reachable_only_through_facade_and_dependencies_stay_acyclic`
+  用真实 A/V fixture 贯通 probe/decode/PCM/transcribe/encode/reprobe，并以
+  manifests 锁定 `domain <- media`、media 不反向依赖 core/render 的 DAG。
diff --git a/docs/specs/media/9-domain-contract.md b/docs/specs/media/9-domain-contract.md
index 77ada73e..0f7c083f 100644
--- a/docs/specs/media/9-domain-contract.md
+++ b/docs/specs/media/9-domain-contract.md
@@ -2,7 +2,20 @@
 
 - **路径**:全部用 `&Path`/`PathBuf`;缓存/模型根用 Tauri `app_cache_dir`/`app_data_dir`(替上游 `~/Library/Caches/PalmierPro`、`~/Library/Application Support/PalmierPro`)。缓存子目录名沿用 `MediaVisualCache`/`Embeddings`/`Transcripts`/`Models` 以便同机迁移可读(`MODULE-PORT-MAP` L923-927)。
 - **字节序**:`.waveform`/`.embed` 固定 little-endian(arm64 mac 写出可互读)。
-- **FFmpeg 许可**:GPL-3.0 项目兼容 FFmpeg (L)GPL(`docs/_analysis/02` 表末、`DECISIONS.md`);动态链接 + NOTICE 标注。
+- **FFmpeg 架构与许可**:运行时通过独立的 **FFmpeg 子进程 sidecar** 驱动，不做 libav 动态链接。许可证判断必须针对实际随包二进制的 configure flags 与组件逐项完成，而不能由主项目许可证代替。Apple Silicon 供应现锁定 FFmpeg/ffprobe 7.0 的压缩包与解包后二进制双 SHA-256，配置为 GPL 且不含 `--enable-nonfree`；供应脚本在安装前拒绝任何报告不可再分发的构建。**Beta 发布阻塞**：Windows/macOS Intel 仍须在各自原生发布门禁执行同一检查。
 - **模型许可/托管**:SigLIP2 与 whisper 权重需自托管为 ONNX/gguf;在 NOTICE/README 标注来源(对齐 `DECISIONS.md` 合规栏)。**唯一网络请求**是模型权重一次性下载(非闭源云);转写/索引/查询全本地(对齐 `Search` 模块「无闭源云接触」,`MODULE-PORT-MAP` L879)。
 - **遥测**:上游 `Log.*.notice(..., telemetry:)` 经 Sentry;OpenTake 改 `tracing` 本地结构化日志,内容仅计数/状态(MODULE-PORT-MAP L879/L1211)。
 - **隐私**:转写/embedding 不外发;只有模型权重下载是出网。
+
+## 可执行子能力集合
+
+本标题聚合可运行的本地媒体边界，并保留需外部/制品审查的合规阻塞；它不把原则文字本身当成完成证据：
+
+- `crates/opentake-media/tests/ffmpeg_integration.rs#probe_reports_dimensions_fps_and_audio`
+- `crates/opentake-media/tests/ffmpeg_integration.rs#decode_frame_returns_rgba_of_expected_size`
+- `crates/opentake-media/tests/ffmpeg_integration.rs#extract_pcm_yields_16k_mono`
+- `crates/opentake-media/tests/ffmpeg_integration.rs#waveform_has_expected_bucket_count`
+- `crates/opentake-media/tests/ffmpeg_integration.rs#encode_roundtrip_produces_playable_video`
+- `crates/opentake-media/src/index_coordinator.rs#export_pause_ref_counts`
+
+这些拥有者分别证明固定本地素材的探测、秒制解码、PCM、缓存派生数据、真实编码往返和导出压力原语。路径均从宿主注入的 `app_cache_dir` / `app_data_dir` 根派生，公共 facade 返回 `MediaError`，源媒体保持只读。网络与许可证还必须通过发布制品审计：模型下载只允许清单指定 URL + 摘要校验；媒体分析不外发；每个平台的最终包必须再次运行 sidecar 双摘要、configure flag、`-L` 与真实编解码门禁，不能仅以代码测试全绿代替制品结论。
diff --git "a/docs/\351\234\200\346\261\202\344\270\216\351\227\256\351\242\230\346\261\207\346\200\273.md" "b/docs/\351\234\200\346\261\202\344\270\216\351\227\256\351\242\230\346\261\207\346\200\273.md"
index a51d1a18..13feaa2d 100644
--- "a/docs/\351\234\200\346\261\202\344\270\216\351\227\256\351\242\230\346\261\207\346\200\273.md"
+++ "b/docs/\351\234\200\346\261\202\344\270\216\351\227\256\351\242\230\346\261\207\346\200\273.md"
@@ -56,6 +56,7 @@
 - "音频"同理（导入/我的+星标收藏）。
 
 ### F4. 工程文件互操作（可被剪映/PR 等打开）
+- **状态（2026-08-01）**：已完成。右上角“导出”菜单可保存 XMEML 4（`.xml`，Premiere / DaVinci / 剪映）、FCPXML 1.10（`.fcpxml`，Final Cut Pro / DaVinci）、OpenTimelineIO（`.otio`）和 CMX3600 EDL（`.edl`）；四条路径均连接当前工程的真实时间线与媒体清单，不返回占位成功。格式自身不能表达的效果会按各导出器文档明确降级。
 - 右上角可"保存工程文件"，保存后能被**剪映 / Premiere / 其他剪辑软件**打开（弥补我们缺的功能）。
 - 先调研：① 我们当前工程文件格式（`opentake-project` crate / `project.json` 结构）；② 剪映草稿格式（`com.lveditor.draft`，JSON）；③ PR 的 XML（FCPXML / Premiere XML）。
 - 方向：导出为 FCPXML（PR/达芬奇/FCP 通用）和/或剪映 draft JSON。
diff --git a/plugins/motion-canvas-studio/.gitignore b/plugins/motion-canvas-studio/.gitignore
new file mode 100644
index 00000000..f4872cf3
--- /dev/null
+++ b/plugins/motion-canvas-studio/.gitignore
@@ -0,0 +1,3 @@
+node_modules/
+.motion-build/
+dist/
diff --git a/plugins/motion-canvas-studio/.npmrc b/plugins/motion-canvas-studio/.npmrc
new file mode 100644
index 00000000..521a9f7c
--- /dev/null
+++ b/plugins/motion-canvas-studio/.npmrc
@@ -0,0 +1 @@
+legacy-peer-deps=true
diff --git a/plugins/motion-canvas-studio/LICENSE b/plugins/motion-canvas-studio/LICENSE
new file mode 100644
index 00000000..b30f04e1
--- /dev/null
+++ b/plugins/motion-canvas-studio/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 motion-canvas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/plugins/motion-canvas-studio/README.md b/plugins/motion-canvas-studio/README.md
new file mode 100644
index 00000000..36cbeca0
--- /dev/null
+++ b/plugins/motion-canvas-studio/README.md
@@ -0,0 +1,21 @@
+# OpenTake Motion Canvas Studio
+
+Pinned browser bundle for OpenTake's first Motion Canvas template. The wrapper
+uses Motion Canvas `v3.17.2`, builds one self-contained offline HTML document,
+and lets OpenTake drive it with exact frame timestamps before encoding the
+captured frames through the packaged FFmpeg.
+
+Run `npm ci && npm audit --audit-level=moderate && npm run licenses && npm test
+&& npm run build`. The release artifact is
+`bundle/runner.html`; it intentionally contains the exact placeholder
+`__OPENTAKE_MOTION_CONFIG_JSON__`, replaced by the Rust host with validated
+template parameters before the document enters the network-disabled Chromium
+sandbox.
+
+This is a wrapper, not a source fork. See `LICENSE` and
+`THIRD_PARTY_NOTICES.md` for upstream identity and modification notes.
+
+The checked-in bundle is reproducible: CI rebuilds it from the lockfile and
+fails if the resulting `bundle/runner.html` differs. Vite 7 is intentionally
+used through a small target-compatibility shim because Motion Canvas 3.17.2's
+declared Vite peer range predates the security-fixed Vite line.
diff --git a/plugins/motion-canvas-studio/THIRD_PARTY_NOTICES.md b/plugins/motion-canvas-studio/THIRD_PARTY_NOTICES.md
new file mode 100644
index 00000000..9c4839d4
--- /dev/null
+++ b/plugins/motion-canvas-studio/THIRD_PARTY_NOTICES.md
@@ -0,0 +1,10 @@
+# Third-party notices
+
+This wrapper embeds Motion Canvas 3.17.2 (`@motion-canvas/core`,
+`@motion-canvas/2d`, and the build-time `@motion-canvas/vite-plugin`). Motion
+Canvas is Copyright © 2022 motion-canvas and distributed under the MIT License;
+the complete license text is preserved in `LICENSE`.
+
+Upstream identity: `motion-canvas/motion-canvas`, tag `v3.17.2`.
+OpenTake modifications are limited to the deterministic offline runner, typed
+template configuration, and the repository sample template.
diff --git a/plugins/motion-canvas-studio/bundle/runner.html b/plugins/motion-canvas-studio/bundle/runner.html
new file mode 100644
index 00000000..83798440
--- /dev/null
+++ b/plugins/motion-canvas-studio/bundle/runner.html
@@ -0,0 +1,71 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <script>
+      window.__OPENTAKE_MOTION_CONFIG__ = __OPENTAKE_MOTION_CONFIG_JSON__;
+    </script>
+    <script type="module" crossorigin>(function(){const e=document.createElement("link").relList;if(e&&e.supports&&e.supports("modulepreload"))return;for(const s of document.querySelectorAll('link[rel="modulepreload"]'))r(s);new MutationObserver(s=>{for(const a of s)if(a.type==="childList")for(const h of a.addedNodes)h.tagName==="LINK"&&h.rel==="modulepreload"&&r(h)}).observe(document,{childList:!0,subtree:!0});function t(s){const a={};return s.integrity&&(a.integrity=s.integrity),s.referrerPolicy&&(a.referrerPolicy=s.referrerPolicy),s.crossOrigin==="use-credentials"?a.credentials="include":s.crossOrigin==="anonymous"?a.credentials="omit":a.credentials="same-origin",a}function r(s){if(s.ep)return;s.ep=!0;const a=t(s);fetch(s.href,a)}})();class ys{constructor(){this.subscribable=new Li(this),this.subscribers=new Set}subscribe(e){return this.subscribers.add(e),()=>this.unsubscribe(e)}unsubscribe(e){this.subscribers.delete(e)}clear(){this.subscribers.clear()}notifySubscribers(e){return[...this.subscribers].map(t=>t(e))}}class Li{constructor(e){this.dispatcher=e}subscribe(e){return this.dispatcher.subscribe(e)}unsubscribe(e){this.dispatcher.unsubscribe(e)}}class Ae extends ys{dispatch(e){this.notifySubscribers(e)}}class yc extends ys{constructor(){super(...arguments),this.value=!1}raise(){this.value||(this.value=!0,this.notifySubscribers())}reset(){this.value=!1}isRaised(){return this.value}subscribe(e){const t=super.subscribe(e);return this.value&&e(),t}}class we extends ys{get current(){return this.value}set current(e){this.value=e,this.notifySubscribers(e)}constructor(e){super(),this.value=e,this.subscribable=new wc(this)}subscribe(e,t=!0){const r=super.subscribe(e);return t&&e(this.value),r}}class wc extends Li{get current(){return this.dispatcher.current}subscribe(e,t=!0){return this.dispatcher.subscribe(e,t)}}class ke{get onChanged(){return this.value.subscribable}get onDisabled(){return this.disabled.subscribable}constructor(e,t){this.name=e,this.initial=t,this.type=void 0,this.spacing=!1,this.description="",this.disabled=new we(!1),this.value=new we(t)}get(){return this.value.current}set(e){this.value.current=this.parse(e)}parse(e){return e}serialize(){return this.value.current}clone(){return new this.constructor(this.name,this.get())}disable(e=!0){return this.disabled.current=e,this}space(e=!0){return this.spacing=e,this}describe(e){return this.description=e,this}}class xc extends ke{get onFieldsChanged(){return this.event.subscribable}constructor(e,t){const r=new Map(Object.entries(t));super(e,Object.fromEntries(Array.from(r,([s,a])=>[s,a.get()]))),this.type=Object,this.ignoreChange=!1,this.customFields={},this.handleChange=()=>{this.ignoreChange||(this.value.current={...this.transform("get"),...this.customFields})},this.event=new we([...r.values()]),this.fields=r;for(const[s,a]of this.fields)Object.defineProperty(this,s,{value:a}),a.onChanged.subscribe(this.handleChange)}set(e){this.ignoreChange=!0;for(const[t,r]of Object.entries(e)){const s=this.fields.get(t);s?s.set(r):this.customFields[t]=r}this.ignoreChange=!1,this.handleChange()}serialize(){return{...this.transform("serialize"),...this.customFields}}clone(){const e=new this.constructor(this.name,this.transform("clone"));return e.set(structuredClone(this.customFields)),e}transform(e){return Object.fromEntries(Array.from(this.fields,([r,s])=>[r,s[e]()]))}}const nt=xc;class fi extends ke{constructor(){super(...arguments),this.type=Boolean}parse(e){return!!e}}class $i extends Error{constructor(e,t){typeof e=="string"?(super(e),this.remarks=t):(super(e.message),this.remarks=e.remarks,this.object=e.object,this.durationMs=e.durationMs,this.inspect=e.inspect)}}class Oi{constructor(){this.resolveCurrent=null,this.current=null}async acquire(){for(;this.current;)await this.current;this.current=new Promise(e=>{this.resolveCurrent=e})}release(){this.current=null,this.resolveCurrent?.(),this.resolveCurrent=null}}const kr=[];function ws(){const n=kr.at(-1);if(!n)throw new Error("The scene is not available in the current context.");return n}function Sc(n){kr.push(n)}function kc(n){if(kr.pop()!==n)throw new Error("startScene/endScene were called out of order.")}function ge(){return kr.at(-1)?.logger??console}const xs=[];function Cr(){const n=xs.at(-1);if(!n)throw new $i("The thread is not available in the current context.",`<p><code>useThread()</code> can only be called from within generator functions.
+      It&#39;s not available during rendering.</p>
+`);return n}function di(n){xs.push(n)}function pi(n){if(xs.pop()!==n)throw new Error("startThread/endThread was called out of order.")}function wt(n){return n[0].toUpperCase()+n.slice(1)}function gi(){let n;return t=>{if(t!==void 0)n=t;else return n}}function Ei(n){return{message:n.message,stack:n.stack,remarks:n.remarks}}const vi=[{value:.25,text:"0.25x (Quarter)"},{value:.5,text:"0.5x (Half)"},{value:1,text:"1.0x (Full)"},{value:2,text:"2.0x (Double)"}],Cc=[{value:"srgb",text:"sRGB"},{value:"display-p3",text:"DCI-P3"}],mi=[{value:30,text:"30 FPS"},{value:60,text:"60 FPS"}];var Oe;(function(n){n.Error="error",n.Warn="warn",n.Info="info",n.Http="http",n.Verbose="verbose",n.Debug="debug",n.Silly="silly"})(Oe||(Oe={}));class Tc{constructor(){this.logged=new Ae,this.history=[],this.profilers={}}get onLogged(){return this.logged.subscribable}log(e){this.logged.dispatch(e),this.history.push(e)}error(e){this.logLevel(Oe.Error,e)}warn(e){this.logLevel(Oe.Warn,e)}info(e){this.logLevel(Oe.Info,e)}http(e){this.logLevel(Oe.Http,e)}verbose(e){this.logLevel(Oe.Verbose,e)}debug(e){this.logLevel(Oe.Debug,e)}silly(e){this.logLevel(Oe.Silly,e)}logLevel(e,t){const r=typeof t=="string"?{message:t}:t;r.level=e,this.log(r)}profile(e,t){const r=performance.now();if(this.profilers[e]){const s=this.profilers[e];delete this.profilers[e];const a=t??{message:e};a.level??(a.level=Oe.Debug),a.durationMs=r-s,this.log(a);return}this.profilers[e]=r}}var at;(function(n){n[n.Playing=0]="Playing",n[n.Rendering=1]="Rendering",n[n.Paused=2]="Paused",n[n.Presenting=3]="Presenting"})(at||(at={}));class Rc{constructor(){this.frame=0,this.speed=1,this.fps=30,this.duration=0,this.finished=!1,this.slides=[],this.previousScene=null,this.state=at.Paused,this.currentSceneReference=null,this.scenes=new we([])}get onSceneChanged(){if(this.currentSceneReference===null)throw new Error("PlaybackManager has not been properly initialized");return this.currentSceneReference.subscribable}get onScenesRecalculated(){return this.scenes.subscribable}get currentScene(){if(this.currentSceneReference===null)throw new Error("PlaybackManager has not been properly initialized");return this.currentSceneReference.current}set currentScene(e){if(!e)throw new Error("Invalid scene.");this.currentSceneReference??(this.currentSceneReference=new we(e)),this.currentSceneReference.current=e}setup(e){this.scenes.current=e,this.currentScene=e[0]}async progress(){return this.finished=await this.next(),this.finished}async seek(e){if(e<=this.frame||this.currentScene.isCached()&&this.currentScene.lastFrame<e){const t=this.findBestScene(e);t!==this.currentScene?(this.previousScene=null,this.currentScene=t,this.frame=this.currentScene.firstFrame,await this.currentScene.reset()):this.frame>=e&&(this.previousScene=null,this.frame=this.currentScene.firstFrame,await this.currentScene.reset())}for(this.finished=!1;this.frame<e&&!this.finished;)this.finished=await this.next();return this.finished}async goBack(){let e=this.currentScene.slides.getCurrent();if(e&&this.currentScene.slides.isWaiting()){const t=this.slides.indexOf(e);e=this.slides[t-1]}await this.seekSlide(e)}async goForward(){const e=this.currentScene.slides.getCurrent(),t=this.slides.indexOf(e);await this.seekSlide(this.slides[t+1])}async goTo(e){await this.seekSlide(this.slides.find(t=>t.id===e))}async seekSlide(e=null){if(!e)return;const{id:t,scene:r}=e;for((this.currentScene!==r||this.currentScene.slides.didHappen(t))&&(this.previousScene=null,this.currentScene=r,this.frame=this.currentScene.firstFrame,this.currentScene.slides.setTarget(t),await this.currentScene.reset()),this.finished=!1,this.currentScene.slides.setTarget(t);!this.currentScene.slides.isWaitingFor(t)&&!this.finished;)this.finished=await this.next();return this.currentScene.slides.setTarget(null),this.finished}async reset(){this.previousScene=null,this.currentScene=this.scenes.current[0],this.frame=0,this.finished=!1,await this.currentScene.reset()}reload(e){this.scenes.current.forEach(t=>t.reload(e))}async recalculate(){this.previousScene=null,this.slides=[];const e=this.speed;this.frame=0,this.speed=1;const t=[];try{for(const r of this.scenes.current)await r.recalculate(s=>{this.frame=s}),this.slides.push(...r.slides.onChanged.current),t.push(r)}finally{this.speed=e}this.scenes.current=t,this.duration=this.frame}async next(){if(this.previousScene&&(await this.previousScene.next(),this.currentScene.isFinished()&&(this.previousScene=null)),this.frame+=this.speed,this.currentScene.isFinished())return!0;if(await this.currentScene.next(),this.previousScene&&this.currentScene.isAfterTransitionIn()&&(this.previousScene=null),this.currentScene.canTransitionOut()){this.previousScene=this.currentScene;const e=this.getNextScene(this.previousScene);e&&(this.currentScene=e,await this.currentScene.reset(this.previousScene)),(!e||this.currentScene.isAfterTransitionIn())&&(this.previousScene=null)}return this.currentScene.isFinished()}findBestScene(e){let t=this.scenes.current[0];for(const r of this.scenes.current){if(!r.isCached()||r.lastFrame>e)return r;t=r}return t}getNextScene(e){const t=this.scenes.current;if(!e)return t[0];const r=t.findIndex(s=>s===e);return r<0?null:t[r+1]??null}}class Pc{constructor(e){this.playback=e}secondsToFrames(e){return Math.ceil(e*this.playback.fps)}framesToSeconds(e){return e/this.playback.fps}get time(){return this.framesToSeconds(this.playback.frame)}get frame(){return this.playback.frame}get speed(){return this.playback.speed}get fps(){return this.playback.fps}get state(){return this.playback.state}get deltaTime(){return this.framesToSeconds(1)*this.speed}}class Mc{get onChanged(){return this.events.subscribable}constructor(e){this.scene=e,this.events=new we([]),this.lookup=new Map,this.handleReload=()=>{this.lookup.clear()},e.onReloaded.subscribe(this.handleReload)}set(){}register(e,t){let r=this.lookup.get(e);if(r===void 0){const s=this.scene.meta.timeEvents.get().find(a=>a.name===e);r=s?s.targetTime-t:0,this.lookup.set(e,r)}return r}}const bi=/^\/\/# sourceURL=(.*)$/gm,Lc=/ERROR: \d+:(\d+): (.*)/g,$c=/^'([^']+)'/;class Oc{constructor(e){this.logger=e,this.gl=null,this.currentOwner=null,this.programLookup=new Map}borrow(e){return this.currentOwner===e?this.gl:(this.currentOwner?.teardown(this.gl),this.currentOwner=e,this.currentOwner.setup(this.getGL()),this.gl)}dispose(){if(this.gl){this.currentOwner?.teardown(this.gl),this.currentOwner=null,this.gl.useProgram(null);for(const{program:e,fragment:t,vertex:r}of this.programLookup.values())this.gl.deleteProgram(e),this.gl.deleteShader(t),this.gl.deleteShader(r);this.programLookup.clear(),this.gl.getExtension("WEBGL_lose_context")?.loseContext(),this.gl.canvas.remove(),this.gl=null}}getProgram(e,t){const r=`${e}#${t}`;if(this.programLookup.has(r))return this.programLookup.get(r).program;const s=this.getGL(),a=this.getShader(s.FRAGMENT_SHADER,e),h=this.getShader(s.VERTEX_SHADER,t);if(!a||!h)return null;const c=s.createProgram();return s.attachShader(c,a),s.attachShader(c,h),s.linkProgram(c),s.getProgramParameter(c,s.LINK_STATUS)?(this.programLookup.set(r,{program:c,fragment:a,vertex:h}),c):(this.logger.error({message:"Failed to initialize the shader program.",remarks:s.getProgramInfoLog(c)??void 0,stack:new Error().stack}),s.deleteProgram(c),null)}getShader(e,t){const r=this.getGL(),s=r.createShader(e);if(r.shaderSource(s,t),r.compileShader(s),!r.getShaderParameter(s,r.COMPILE_STATUS)){const a=r.getShaderInfoLog(s);return Ec(this.logger,a,t),r.deleteShader(s),null}return s}getGL(){if(this.gl)return this.gl;if(this.gl=document.createElement("canvas").getContext("webgl2",{depth:!1,premultipliedAlpha:!1,stencil:!1,powerPreference:"high-performance"}),!this.gl)throw new Error("Failed to initialize WebGL.");return this.gl}}function Ec(n,e,t){let r=null;bi.lastIndex=0;const s=bi.exec(t);if(s){const c=new URL(s[1],window.location.origin);c.searchParams.set("t",Date.now().toString()),r=c.toString()}if(!e)return n.error({message:"Unknown shader compilation error.",stack:hs(r,1,0)}),null;let a=!1,h;for(;h=Lc.exec(e);){const[,c,g]=h;let y=0;const C=g.match($c);if(C){const q=t.split(`
+`)[parseInt(c)-1].indexOf(C[1]);if(q!==-1&&(y=q),C[1]==="include"&&t.split(`
+`).find(xe=>xe.startsWith("#include"))){a=!0,n.error({message:`Shader compilation error: ${g}`,remarks:`<p>The <code>#include</code> directive requires the use of a preprocessor.</p>
+<p>Make sure to import the shader from a file:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">import</span> shader <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;./shader.glsl&#x27;</span>;</code></pre><p>Do <strong>NOT</strong> use the raw loader:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">import</span> shader <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;./shader.glsl?raw&#x27;</span>;</code></pre><p>Do <strong>NOT</strong> use <code>#include</code> in an inline string:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">const</span> shader = <span class="hljs-string">\`\\
+#include &quot;example.glsl&quot;
+\`</span>;</code></pre><p><a href='https://motioncanvas.io/docs/shaders' target='_blank'>Learn more</a> about working with shaders.</p>
+`});break}}a=!0,n.error({message:`Shader compilation error: ${g}`,stack:hs(r,c,y)})}a||n.error({message:`Shader compilation error: ${e}`,stack:hs(r,1,0)})}function hs(n,e,t){if(n)return navigator.userAgent.toLowerCase().includes("chrome")?`  at (${n}:${e}:${t})`:`@${n}:${e}:${t}`}class Ac{get canvasSize(){return this.size.scale(this.resolutionScale)}constructor(){this.background=null,this.resolutionScale=1,this.colorSpace="srgb",this.size=v.zero,this.finalBuffer=document.createElement("canvas"),this.currentBuffer=document.createElement("canvas"),this.previousBuffer=document.createElement("canvas");const e=this.colorSpace;this.context=It({colorSpace:e},this.finalBuffer),this.currentContext=It({colorSpace:e},this.currentBuffer),this.previousContext=It({colorSpace:e},this.previousBuffer)}configure({colorSpace:e=this.colorSpace,size:t=this.size,resolutionScale:r=this.resolutionScale,background:s=this.background}){e!==this.colorSpace&&(this.colorSpace=e,this.context=It({colorSpace:e},this.finalBuffer),this.currentContext=It({colorSpace:e},this.currentBuffer),this.previousContext=It({colorSpace:e},this.previousBuffer)),(!t.exactlyEquals(this.size)||r!==this.resolutionScale)&&(this.resolutionScale=r,this.size=t,this.resizeCanvas(this.context),this.resizeCanvas(this.currentContext),this.resizeCanvas(this.previousContext)),this.background=typeof s=="string"?s:s?.serialize()??null}async render(e,t){const r=t?ot(e.previousOnTop):!1;t&&await t.render(this.previousContext),await e.render(this.currentContext);const s=this.canvasSize;this.context.clearRect(0,0,s.width,s.height),this.background&&(this.context.save(),this.context.fillStyle=this.background,this.context.fillRect(0,0,s.width,s.height),this.context.restore()),t&&!r&&this.context.drawImage(this.previousBuffer,0,0),this.context.drawImage(this.currentBuffer,0,0),r&&this.context.drawImage(this.previousBuffer,0,0)}resizeCanvas(e){const t=this.canvasSize;e.canvas.width=t.width,e.canvas.height=t.height}}function Fc(n){const e={version:new ke("version",1),shared:new nt("General",{background:new gs("background",null),range:new Mr("range",[0,1/0]),size:new Ui("resolution",new v(1920,1080)),audioOffset:new fs("audio offset",0)}),preview:new nt("Preview",{fps:new fs("frame rate",30).setPresets(mi).setRange(1),resolutionScale:new St("scale",vi,1)}),rendering:new nt("Rendering",{fps:new fs("frame rate",60).setPresets(mi).setRange(1),resolutionScale:new St("scale",vi,1),colorSpace:new St("color space",Cc),exporter:new mu("exporter",n)})};return e.shared.audioOffset.disable(!n.audio),e}class zc extends nt{constructor(e){super("project",Fc(e))}getFullPreviewSettings(){return{...this.shared.get(),...this.preview.get()}}getFullRenderingSettings(){return{...this.shared.get(),...this.rendering.get()}}}class Ic{constructor(){this.completion=new we(0),this.startTimestamp=0,this.lastUpdateTimestamp=0,this.nextCompletion=0}get onCompletionChanged(){return this.completion.subscribable}estimate(e=performance.now()){const t=e-this.startTimestamp,r=this.completion.current;let s=1/0;return r>=1?s=0:r>0?(s=(this.lastUpdateTimestamp-this.startTimestamp)/r-t,s=Math.max(0,s)):this.nextCompletion>0&&(s=t/this.nextCompletion-t),{completion:r,elapsed:t,eta:s}}update(e,t=performance.now()){this.completion.current=pe(0,1,e),this.lastUpdateTimestamp=t}reset(e=0,t=performance.now()){this.startTimestamp=t,this.lastUpdateTimestamp=t,this.completion.current=0,this.nextCompletion=e}}var tt;(function(n){n[n.Initial=0]="Initial",n[n.Working=1]="Working",n[n.Aborting=2]="Aborting"})(tt||(tt={}));var $e;(function(n){n[n.Success=0]="Success",n[n.Error=1]="Error",n[n.Aborted=2]="Aborted"})($e||($e={}));class _c{get onStateChanged(){return this.state.subscribable}get onFinished(){return this.finished.subscribable}get onFrameChanged(){return this.frame.subscribable}constructor(e){this.project=e,this.state=new we(tt.Initial),this.finished=new Ae,this.frame=new we(0),this.stage=new Ac,this.estimator=new Ic,this.lock=new Oi,this.exporter=null,this.abortController=null,this.playback=new Rc,this.status=new Pc(this.playback),this.sharedWebGLContext=new Oc(this.project.logger);const t=[];for(const r of e.scenes){const s=new r.klass({...r,meta:r.meta.clone(),logger:this.project.logger,playback:this.status,size:new v(1920,1080),resolutionScale:1,timeEventsClass:Mc,sharedWebGLContext:this.sharedWebGLContext,experimentalFeatures:e.experimentalFeatures});t.push(s)}this.playback.setup(t)}async render(e){if(this.state.current!==tt.Initial)return;await this.lock.acquire(),this.estimator.reset(),this.state.current=tt.Working;let t;try{this.abortController=new AbortController,t=await this.run(e,this.abortController.signal)}catch(r){if(this.project.logger.error(r),t=$e.Error,this.exporter){try{await this.exporter.stop?.(t)}catch{}this.exporter=null}}this.estimator.update(1),this.state.current=tt.Initial,this.finished.dispatch(t),this.sharedWebGLContext.dispose(),this.lock.release()}abort(){this.state.current===tt.Working&&(this.abortController?.abort(),this.state.current=tt.Aborting)}async renderFrame(e,t){await this.lock.acquire();try{const r=this.status.secondsToFrames(t);this.stage.configure(e),this.playback.fps=e.fps,this.playback.state=at.Rendering,await this.reloadScenes(e),await this.playback.reset(),await this.playback.seek(r),await this.stage.render(this.playback.currentScene,this.playback.previousScene)}catch(r){this.project.logger.error(r)}this.lock.release()}async run(e,t){const r=this.project.meta.rendering.exporter.exporters.find(g=>g.id===e.exporter.name);if(!r)return this.project.logger.error(`Could not find the "${e.exporter.name}" exporter.`),$e.Error;this.exporter=await r.create(this.project,e),this.exporter.configuration&&(e={...e,...await this.exporter.configuration()??{}}),this.stage.configure(e),this.playback.fps=e.fps,this.playback.state=at.Rendering;const s=this.status.secondsToFrames(e.range[0]);if(this.frame.current=s,await this.reloadScenes(e),await this.playback.recalculate(),t.aborted||(await this.playback.reset(),t.aborted))return $e.Aborted;const a=Math.min(this.playback.duration,this.status.secondsToFrames(e.range[1]));if(await this.playback.seek(s),t.aborted)return $e.Aborted;await this.exporter.start?.();let h=performance.now(),c=$e.Success;try{if(this.estimator.reset(1/(a-s)),await this.exportFrame(t),this.estimator.update(ki(s,a,0,1,this.playback.frame)),t.aborted)c=$e.Aborted;else{let g=!1;for(;!g;)await this.playback.progress(),await this.exportFrame(t),this.estimator.update(ki(s,a,0,1,this.playback.frame)),performance.now()-h>1/30&&(h=performance.now(),await new Promise(y=>setTimeout(y,0))),(this.playback.finished||this.playback.frame>=a)&&(g=!0),t.aborted&&(c=$e.Aborted,g=!0)}}catch(g){this.project.logger.error(g),c=$e.Error}return await this.exporter.stop?.(c),this.exporter=null,c}async reloadScenes(e){for(let t=0;t<this.project.scenes.length;t++){const r=this.project.scenes[t],s=this.playback.onScenesRecalculated.current[t];s.reload({config:r.onReplaced.current.config,size:e.size,resolutionScale:e.resolutionScale}),s.meta.set(r.meta.get()),s.variables.updateSignals(this.project.variables??{})}}async exportFrame(e){this.frame.current=this.playback.frame,await this.stage.render(this.playback.currentScene,this.playback.previousScene);const t=this.playback.frame-this.playback.currentScene.firstFrame;await this.exporter.handleFrame(this.stage.finalBuffer,this.playback.frame,t,this.playback.currentScene.name,e)}}function jc(){return new nt("Application Settings",{version:new ke("version",1),appearance:new nt("Appearance",{color:new gs("accent color",new lt("#33a6ff")).describe("The accent color for the user interface. (Leave empty to use the default color)"),font:new fi("legacy font",!1).describe("Use the 'JetBrains Mono' font for the user interface."),coordinates:new fi("coordinates",!0).describe("Display mouse coordinates within the preview window.")}),defaults:new nt("Defaults",{background:new gs("background",null).describe("The default background color used in new projects."),size:new Ui("resolution",new v(1920,1080)).describe("The default resolution used in new projects.")})})}function Dc(n,e,t,r,s,a,h=r.logger??new Tc){const c=jc();a.attach(c);const g={name:n,...r,plugins:t,versions:e,settings:c,logger:h};return g.meta=new zc(g),g.meta.shared.set(c.defaults.get()),g.experimentalFeatures??(g.experimentalFeatures=!1),s.attach(g.meta),g}function Nc(n,e){return{level:Oe.Error,message:n,remarks:`<p>This feature requires enabling the <code>experimentalFeatures</code> flag in your project
+configuration:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-title function_">makeProject</span>({
+  <span class="hljs-attr">experimentalFeatures</span>: <span class="hljs-literal">true</span>,
+  <span class="hljs-comment">// ...</span>
+});</code></pre><p><a href='https://motioncanvas.io/docs/experimental' target='_blank'>Learn more</a> about experimental
+features.</p>
+`}}function It(n,e=document.createElement("canvas")){const t=e.getContext("2d",n);if(!t)throw new Error("Could not create a 2D context.");return t}const Bc=180/Math.PI,ds=Math.PI/180;function yi(n,e,t){let r=0,s=n;t=t===void 0?r<s?1:-1:t;const a=[];let h=Math.max(Math.ceil((s-r)/t),0),c=0;for(;h--;)a[c++]=r,r+=t;return a}function Wc(n){const e=ws(),t=Cr();return e.timeEvents.register(n,t.time())}const Ss=[];function Ai(){const n=Ss.at(-1);if(!n)throw new Error("The playback is not available in the current context.");return n}function Uc(n){Ss.push(n)}function Gc(n){if(Ss.pop()!==n)throw new Error("startPlayback/endPlayback were called out of order.")}function ct(n,...e){const t={[n.name]:n},r=Object.getOwnPropertyDescriptor(t,n.name);if(r)for(let s=e.length-1;s>=0;s--)e[s](t,n.name,r)}const wi=Symbol.for("@motion-canvas/core/decorators/UNINITIALIZED");function Tr(n){return(e,t)=>{let r=wi;Object.defineProperty(e,t,{get(){return r===wi&&(r=n.call(this)),r}})}}function oe(n){return function(e,t,r){r.value.prototype.name=n??t,r.value.prototype.threadable=!0}}ct(it,oe());function*it(...n){for(const e of n)yield e;yield*_i(...n)}ct(qc,oe());function*qc(n,e){yield*Rr(Wc(n)),e&&(yield*e)}ct(Rr,oe());function*Rr(n=0,e){const t=Cr(),r=Ai().framesToSeconds(1),s=t.time()+n;for(;s-r>t.fixed;)yield;t.time(s),e&&(yield*e)}ct(Fi,oe());function*Fi(){}function xi(n,e){let t;return typeof n=="string"?(t=e(),Sr(t,n)):(t=n(),Sr(t,t)),t}function Xc(n){return n&&(typeof n=="object"||typeof n=="function")&&"toPromise"in n}function zi(n){return n!==null&&typeof n=="object"&&Symbol.iterator in n&&"next"in n}function Sr(n,e){const t=Object.getPrototypeOf(n);t.threadable||(t.threadable=!0,t.name=typeof e=="string"?e:Ii(e))}function Ii(n){return Object.getPrototypeOf(n).name??null}class cs{get onDeferred(){return this.deferred.subscribable}get fixed(){return this.fixedTime}get canceled(){return this.isCanceled||(this.parent?.canceled??!1)}get paused(){return this.isPaused||(this.parent?.paused??!1)}get root(){return this.parent?.root??this}constructor(e){this.runner=e,this.deferred=new Ae,this.children=[],this.time=Nt(0),this.parent=null,this.isCanceled=!1,this.isPaused=!1,this.fixedTime=0,this.queue=[],this.runner.task&&(ge().error({message:`The generator "${Ii(this.runner)}" is already being executed by another thread.`,remarks:`<p>This usually happens when you mistakenly reuse a generator that is already
+running.</p>
+<p>For example, using <code>yield</code> here will run the opacity generator concurrently and
+store it in the <code>task</code> variable (in case you want to cancel or await it later):</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">const</span> task = <span class="hljs-keyword">yield</span> <span class="hljs-title function_">rect</span>().<span class="hljs-title function_">opacity</span>(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>);</code></pre><p>Trying to <code>yield</code> this task again will cause the current error:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">yield</span> task;</code></pre><p>Passing it to other flow functions will also cause the error:</p>
+<pre class=""><code class="language-ts"><span class="hljs-keyword">yield</span>* <span class="hljs-title function_">all</span>(task);</code></pre><p>Try to investigate your code looking for <code>yield</code> statements whose return value
+is reused in this way. Here&#39;s an example of a common mistake:</p>
+<pre class="wrong"><code class="language-ts"><span class="hljs-keyword">yield</span>* <span class="hljs-title function_">all</span>(
+  <span class="hljs-keyword">yield</span> <span class="hljs-title function_">rect</span>().<span class="hljs-title function_">opacity</span>(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>),
+  <span class="hljs-keyword">yield</span> <span class="hljs-title function_">rect</span>().<span class="hljs-title function_">x</span>(<span class="hljs-number">200</span>, <span class="hljs-number">1</span>),
+);</code></pre><pre class="correct"><code class="language-ts"><span class="hljs-keyword">yield</span>* <span class="hljs-title function_">all</span>(
+  <span class="hljs-title function_">rect</span>().<span class="hljs-title function_">opacity</span>(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>),
+  <span class="hljs-title function_">rect</span>().<span class="hljs-title function_">x</span>(<span class="hljs-number">200</span>, <span class="hljs-number">1</span>),
+);</code></pre>`}),this.runner=Fi()),this.runner.task=this}next(){if(this.paused)return{value:null,done:!1};di(this);const e=this.runner.next(this.value);return pi(this),this.value=null,e}update(e){this.paused||(this.time(this.time()+e),this.fixedTime+=e),this.children=this.children.filter(t=>!t.canceled)}spawn(e){return zi(e)||(e=e()),this.queue.push(e),e}add(e){e.parent=this,e.isCanceled=!1,e.time(this.time()),e.fixedTime=this.fixedTime,this.children.push(e),Sr(e.runner,`unknown ${this.children.length}`)}drain(e){this.queue.forEach(e),this.queue=[]}cancel(){this.deferred.clear(),this.runner.return(),this.isCanceled=!0,this.parent=null,this.drain(e=>e.return())}pause(e){this.isPaused=e}runDeferred(){di(this),this.deferred.dispatch(),pi(this)}}ct(_i,oe());function*_i(n,...e){let t=!0;typeof n=="boolean"?t=n:e.push(n);const r=Cr(),s=e.map(c=>r.children.find(g=>g.runner===c)).filter(c=>c),a=r.time();let h;if(t){for(;s.find(c=>!c.canceled);)yield;h=Math.max(...s.map(c=>c.time()))}else{for(;!s.find(g=>g.canceled);)yield;const c=s.filter(g=>g.canceled);h=Math.min(...c.map(g=>g.time()))}r.time(Math.max(a,h))}function Hc(n){return typeof n?.then=="function"}ct(ji,oe());function*ji(n,e){const t=Ai(),r=n();Sr(r,"root");const s=new cs(r);e?.(s);let a=[s];for(;a.length>0;){const h=[],c=[...a],g=t.deltaTime;for(;c.length>0;){const y=c.pop();if(!y||y.canceled)continue;const C=y.next();if(C.done){y.cancel();continue}if(zi(C.value)){const I=new cs(C.value);y.value=C.value,y.add(I),c.push(y),c.push(I)}else C.value?(y.value=yield C.value,c.push(y)):(y.update(g),y.drain(I=>{const q=new cs(I);y.add(q),h.unshift(q)}),h.unshift(y))}a=[];for(const y of h)y.canceled||(a.push(y),y.runDeferred());a.length>0&&(yield)}}var De;(function(n){n[n.BeforeRender=0]="BeforeRender",n[n.BeginRender=1]="BeginRender",n[n.FinishRender=2]="FinishRender",n[n.AfterRender=3]="AfterRender"})(De||(De={}));class Yc{get onBeforeRender(){return this.beforeRender.subscribable}get onBeginRender(){return this.beginRender.subscribable}get onFinishRender(){return this.finishRender.subscribable}get onAfterRender(){return this.afterRender.subscribable}constructor(e){this.scene=e,this.beforeRender=new Ae,this.beginRender=new Ae,this.finishRender=new Ae,this.afterRender=new Ae,this.scene.onRenderLifecycle.subscribe(([t,r])=>{switch(t){case De.BeforeRender:return this.beforeRender.dispatch(r);case De.BeginRender:return this.beginRender.dispatch(r);case De.FinishRender:return this.finishRender.dispatch(r);case De.AfterRender:return this.afterRender.dispatch(r)}}),this.scene.onReset.subscribe(()=>{this.beforeRender.clear(),this.beginRender.clear(),this.finishRender.clear(),this.afterRender.clear()})}}class Zt{constructor(e){this.state=e,this.nextGauss=null}static createSeed(){return Math.floor(Math.random()*4294967296)}nextFloat(e=0,t=1){return K(e,t,this.next())}nextInt(e=0,t=4294967296){let r=Math.floor(K(e,t,this.next()));return r===t&&(r=e),r}gauss(e=0,t=1){let r=this.nextGauss;if(this.nextGauss=null,r===null){const s=this.next()*2*Math.PI,a=Math.sqrt(-2*Math.log(1-this.next()));r=Math.cos(s)*a,this.nextGauss=Math.sin(s)*a}return e+r*t}floatArray(e,t=0,r=1){return yi(e).map(()=>this.nextFloat(t,r))}intArray(e,t=0,r=4294967296){return yi(e).map(()=>this.nextInt(t,r))}spawn(){return new Zt(this.nextInt())}next(){this.state|=0,this.state=this.state+1831565813|0;let e=Math.imul(this.state^this.state>>>15,1|this.state);return e=e+Math.imul(e^e>>>7,61|e)^e,((e^e>>>14)>>>0)/4294967296}}var fe;(function(n){n[n.Initial=0]="Initial",n[n.AfterTransitionIn=1]="AfterTransitionIn",n[n.CanTransitionOut=2]="CanTransitionOut",n[n.Finished=3]="Finished"})(fe||(fe={}));const Zc="resolution",Vc="destinationTexture",Jc="sourceTexture",Si="time",Qc="deltaTime",Kc="framerate",eu="sourceMatrix",tu="destinationMatrix",ru=`#version 300 es
+
+in vec2 position;
+
+out vec2 screenUV;
+out vec2 sourceUV;
+out vec2 destinationUV;
+
+uniform mat4 sourceMatrix;
+uniform mat4 destinationMatrix;
+
+void main() {
+    vec2 position_source = position * 0.5 + 0.5;
+    vec4 position_screen = sourceMatrix * vec4(position_source, 0, 1);
+
+    screenUV = position_screen.xy;
+    sourceUV = position_source;
+    destinationUV = (destinationMatrix * position_screen).xy;
+
+    gl_Position = (position_screen - 0.5) * 2.0;
+}
+`;class su{constructor(e,t){this.scene=e,this.sharedContext=t,this.gl=null,this.positionBuffer=null,this.sourceTexture=null,this.destinationTexture=null,this.positionLocation=0,this.quadPositions=new Float32Array([-1,1,-1,-1,1,1,1,-1]),this.handleReload=()=>{this.gl&&this.updateViewport()},e.onReloaded.subscribe(this.handleReload)}setup(e){this.gl=e,this.updateViewport(),this.positionBuffer=e.createBuffer(),e.bindBuffer(e.ARRAY_BUFFER,this.positionBuffer),e.bufferData(e.ARRAY_BUFFER,this.quadPositions,e.STATIC_DRAW),e.vertexAttribPointer(this.positionLocation,2,e.FLOAT,!1,0,0),e.enableVertexAttribArray(this.positionLocation),this.sourceTexture=e.createTexture(),e.activeTexture(e.TEXTURE0),e.bindTexture(e.TEXTURE_2D,this.sourceTexture),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE),this.destinationTexture=e.createTexture(),e.activeTexture(e.TEXTURE1),e.bindTexture(e.TEXTURE_2D,this.destinationTexture),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE)}teardown(e){e.deleteBuffer(this.positionBuffer),e.disableVertexAttribArray(this.positionLocation),e.deleteTexture(this.sourceTexture),e.deleteTexture(this.destinationTexture),this.positionBuffer=null,this.sourceTexture=null,this.destinationTexture=null,this.gl=null}updateViewport(){if(this.gl){const e=this.scene.getRealSize();this.gl.canvas.width=e.width,this.gl.canvas.height=e.height,this.gl.viewport(0,0,e.width,e.height)}}getGL(){return this.gl??this.sharedContext.borrow(this)}getProgram(e){const t=this.sharedContext.getProgram(e,ru);if(!t)return null;const r=this.scene.getRealSize(),s=this.getGL();return s.useProgram(t),s.uniform1i(s.getUniformLocation(t,Jc),0),s.uniform1i(s.getUniformLocation(t,Vc),1),s.uniform2f(s.getUniformLocation(t,Zc),r.x,r.y),s.uniform1f(s.getUniformLocation(t,Qc),this.scene.playback.deltaTime),s.uniform1f(s.getUniformLocation(t,Kc),this.scene.playback.fps),t}copyTextures(e,t){this.copyTexture(t,this.sourceTexture),this.copyTexture(e,this.destinationTexture)}clear(){const e=this.getGL();e.clearColor(0,0,0,0),e.clear(e.COLOR_BUFFER_BIT)}render(){const e=this.getGL();e.drawArrays(e.TRIANGLE_STRIP,0,4)}copyTexture(e,t){const r=this.getGL();r.bindTexture(r.TEXTURE_2D,t),r.texImage2D(r.TEXTURE_2D,0,r.RGBA,r.RGBA,r.UNSIGNED_BYTE,e),r.generateMipmap(r.TEXTURE_2D)}}class nu{get onChanged(){return this.slides.subscribable}constructor(e){this.scene=e,this.slides=new we([]),this.lookup=new Map,this.collisionLookup=new Set,this.current=null,this.canResume=!1,this.waitsForId=null,this.targetId=null,this.handleReload=()=>{this.lookup.clear(),this.collisionLookup.clear(),this.current=null,this.waitsForId=null,this.targetId=null},this.handleReset=()=>{this.collisionLookup.clear(),this.current=null,this.waitsForId=null},this.handleRecalculated=()=>{this.slides.current=[...this.lookup.values()]},this.scene.onReloaded.subscribe(this.handleReload),this.scene.onReset.subscribe(this.handleReset),this.scene.onRecalculated.subscribe(this.handleRecalculated)}setTarget(e){this.targetId=e}resume(){this.canResume=!0}isWaitingFor(e){return this.waitsForId===e}isWaiting(){return this.waitsForId!==null}didHappen(e){if(this.current===null)return!1;for(const t of this.lookup.keys()){if(t===e)return!0;if(t===this.current?.id)return!1}return!1}getCurrent(){return this.current}register(e,t){if(this.waitsForId!==null)throw new Error(`The animation already waits for a slide: ${this.waitsForId}.`);const r=this.toId(e);this.scene.playback.state!==at.Presenting&&(this.lookup.has(r)||this.lookup.set(r,{id:r,name:e,time:t,scene:this.scene,stack:new Error().stack}),this.collisionLookup.has(e)?this.scene.logger.warn({message:`A slide named "${e}" already exists.`,stack:new Error().stack}):this.collisionLookup.add(e)),this.waitsForId=r,this.current=this.lookup.get(r)??null,this.canResume=!1}shouldWait(e){const t=this.toId(e);if(this.waitsForId!==t)throw new Error(`The animation waits for a different slide: ${this.waitsForId}.`);if(!this.lookup.get(t))throw new Error(`Could not find the "${e}" slide.`);let s=this.canResume;return this.scene.playback.state!==at.Presenting&&(s=t!==this.targetId),s&&(this.waitsForId=null),!s}toId(e){return`${this.scene.name}:${e}`}}class iu{constructor(e){this.scene=e,this.signals={},this.variables={},this.handleReset=()=>{this.signals={}},e.onReset.subscribe(this.handleReset)}get(e,t){var r;return(r=this.signals)[e]??(r[e]=Nt(this.variables[e]??t)),()=>this.signals[e]()}updateSignals(e){this.variables=e,Object.keys(e).map(t=>{t in this.signals&&this.signals[t](e[t])})}}class au{get firstFrame(){return this.cache.current.firstFrame}get lastFrame(){return this.firstFrame+this.cache.current.duration}get onCacheChanged(){return this.cache.subscribable}get onReloaded(){return this.reloaded.subscribable}get onRecalculated(){return this.recalculated.subscribable}get onThreadChanged(){return this.thread.subscribable}get onRenderLifecycle(){return this.renderLifecycle.subscribable}get onReset(){return this.afterReset.subscribable}get LifecycleEvents(){return this.logger.warn("LifecycleEvents is deprecated. Use lifecycleEvents instead."),this.lifecycleEvents}get previous(){return this.previousScene}constructor(e){this.cache=new we({firstFrame:0,transitionDuration:0,duration:0,lastFrame:0}),this.reloaded=new Ae,this.recalculated=new Ae,this.thread=new we(null),this.renderLifecycle=new Ae,this.afterReset=new Ae,this.lifecycleEvents=new Yc(this),this.previousScene=null,this.runner=null,this.state=fe.Initial,this.cached=!1,this.counters={},this.name=e.name,this.size=e.size,this.resolutionScale=e.resolutionScale,this.logger=e.logger,this.playback=e.playback,this.meta=e.meta,this.runnerFactory=e.config,this.creationStack=e.stack,this.experimentalFeatures=e.experimentalFeatures??!1,ct(this.runnerFactory,oe(this.name)),this.timeEvents=new e.timeEventsClass(this),this.variables=new iu(this),this.shaders=new su(this,e.sharedWebGLContext),this.slides=new nu(this),this.random=new Zt(this.meta.seed.get()),this.previousOnTop=!1}update(){}async render(e){let t=0;do t++,await ae.consumePromises(),e.save(),e.clearRect(0,0,e.canvas.width,e.canvas.height),this.execute(()=>this.draw(e)),e.restore();while(ae.hasPromises()&&t<10);t>1&&this.logger.debug(`render iterations: ${t}`)}reload({config:e,size:t,stack:r,resolutionScale:s}={}){e&&(this.runnerFactory=e),t&&(this.size=t),s&&(this.resolutionScale=s),r&&(this.creationStack=r),this.cached=!1,this.reloaded.dispatch()}async recalculate(e){const t=this.cache.current;if(t.firstFrame=this.playback.frame,t.lastFrame=t.firstFrame+t.duration,this.isCached()){e(t.lastFrame),this.cache.current={...t};return}for(t.transitionDuration=-1,await this.reset();!this.canTransitionOut();)t.transitionDuration<0&&this.state===fe.AfterTransitionIn&&(t.transitionDuration=this.playback.frame-t.firstFrame),e(this.playback.frame+1),await this.next();t.transitionDuration===-1&&(t.transitionDuration=0),t.lastFrame=this.playback.frame,t.duration=t.lastFrame-t.firstFrame,await new Promise(r=>setTimeout(r,0)),this.cached=!0,this.cache.current={...t},this.recalculated.dispatch()}async next(){if(!this.runner)return;let e=this.execute(()=>this.runner.next());for(this.update();e.value;){if(Xc(e.value)){const t=await e.value.toPromise();e=this.execute(()=>this.runner.next(t))}else if(Hc(e.value)){const t=await e.value;e=this.execute(()=>this.runner.next(t))}else this.logger.warn({message:"Invalid value yielded by the scene.",object:e.value}),e=this.execute(()=>this.runner.next(e.value));this.update()}if(ae.hasPromises()){const t=await ae.consumePromises();this.logger.error({message:"Tried to access an asynchronous property before the node was ready. Make sure to yield the node before accessing the property.",stack:t[0].stack,inspect:t[0].owner?.key??void 0})}e.done&&(this.state=fe.Finished)}async reset(e=null){this.counters={},this.previousScene=e,this.previousOnTop=!1,this.random=new Zt(this.meta.seed.get()),this.runner=ji(()=>this.runnerFactory(this.getView()),t=>{this.thread.current=t}),this.state=fe.AfterTransitionIn,this.afterReset.dispatch(),await this.next()}getSize(){return this.size}getRealSize(){return this.size.mul(this.resolutionScale)}isAfterTransitionIn(){return this.state===fe.AfterTransitionIn}canTransitionOut(){return this.state===fe.CanTransitionOut||this.state===fe.Finished}isFinished(){return this.state===fe.Finished}enterInitial(){this.state===fe.AfterTransitionIn?this.state=fe.Initial:this.logger.warn(`Scene ${this.name} entered initial in an unexpected state: ${this.state}`)}enterAfterTransitionIn(){this.state===fe.Initial?this.state=fe.AfterTransitionIn:this.logger.warn(`Scene ${this.name} transitioned in an unexpected state: ${this.state}`)}enterCanTransitionOut(){this.state===fe.AfterTransitionIn||this.state===fe.Initial?this.state=fe.CanTransitionOut:this.logger.warn(`Scene ${this.name} was marked as finished in an unexpected state: ${this.state}`)}isCached(){return this.cached}execute(e){let t;Sc(this),Uc(this.playback);try{t=e()}finally{Gc(this.playback),kc(this)}return t}}function ou(){return new nt("scene",{version:new ke("version",1),timeEvents:new ke("time events",[]),seed:new ke("seed",Zt.createSeed())})}function Di(n,e,t){const r=[...n],s=[...e];if(s.length>=r.length){const a=Math.floor(s.length*t),h=Math.floor(K(r.length-1,s.length,t));let c="";for(let g=0;g<s.length;g++)g<a?c+=s[g]:(r[g]||g<=h)&&(c+=r[g]??s[g]);return c}else{const a=Math.round(r.length*(1-t)),h=Math.floor(K(r.length+1,s.length,t)),c=[];for(let g=r.length-1;g>=0;g--)g<a?c.unshift(r[g]):(s[g]||g<h)&&c.unshift(s[g]??r[g]);return c.join("")}}function Dt(n,e,t,r=!1){if(t===0)return n;if(t===1)return e;if(n==null||e==null){r||ge().warn(`Attempting to lerp ${n} -> ${e} may result in unexpected behavior.`);return}if(typeof n=="number"&&typeof e=="number")return K(n,e,t);if(typeof n=="string"&&typeof e=="string")return Di(n,e,t);if(typeof n=="boolean"&&typeof e=="boolean")return t<.5?n:e;if("lerp"in n)return n.lerp(e,t);if(n&&e&&typeof n=="object"&&typeof e=="object")if(Array.isArray(n)&&Array.isArray(e)){if(n.length===e.length)return n.map((s,a)=>Dt(s,e[a],t))}else{let s=!1;if(!(n instanceof Map)&&!(e instanceof Map)&&(s=!0,n=new Map(Object.entries(n)),e=new Map(Object.entries(e))),n instanceof Map&&e instanceof Map){const a=new Map;for(const h of new Set([...n.keys(),...e.keys()])){const c=Dt(n.get(h),e.get(h),t,!0);c!==void 0&&a.set(h,c)}return s?Object.fromEntries(a):a}}return e}function lu(n,e,t){return t<.5?n:e}function K(n,e,t){return n+(e-n)*t}function Ni(n,e,t,r,s){return t+(s-n)*(r-t)/(e-n)}function pe(n,e,t){return t<n?n:t>e?e:t}function ki(n,e,t,r,s){const a=Ni(n,e,t,r,s);return pe(t,r,a)}function Bi(n,e,t){let r=e;t>1?t=1/t:r=!r;const s=r?Math.acos(pe(-1,1,1-n)):Math.asin(n),a=K(s,K(0,Math.PI/2,n),t);let h=Math.sin(a),c=1-Math.cos(a);return e&&([h,c]=[c,h]),new v(h,c)}function us(n,e=0,t=1){return n=1-Math.pow(1-n,3),K(e,t,n)}function _e(n,e=0,t=1){return n=n<.5?4*n*n*n:1-Math.pow(-2*n+2,3)/2,K(e,t,n)}function hu(n,e=0,t=1){return n=n===1?1:1-Math.pow(2,-10*n),K(e,t,n)}function cu(n,e=0,t=1){return K(e,t,n)}ct(je,oe());function*je(n,e,t){const r=Cr(),s=r.time(),a=r.time()+n;for(e(0,0);a>r.fixed;){const h=r.fixed-s,c=h/n;h>0&&e(c,h),yield}r.time(a),e(1,n),t?.(1,n)}class ae{static collectPromise(e,t=null){const r={promise:e,value:t,stack:new Error().stack},s=this.collectionStack.at(-1);return s&&(r.owner=s.owner),e.then(a=>{r.value=a,s?.markDirty()}),this.promises.push(r),r}static hasPromises(){return this.promises.length>0}static async consumePromises(){const e=[...this.promises];return await Promise.all(e.map(t=>t.promise)),this.promises=this.promises.filter(t=>!e.includes(t)),e}constructor(e){this.owner=e,this.dependencies=new Set,this.event=new yc,this.markDirty=()=>this.event.raise(),this.invokable=this.invoke.bind(this),Object.defineProperty(this.invokable,"context",{value:this}),Object.defineProperty(this.invokable,"toPromise",{value:this.toPromise.bind(this)})}invoke(){}startCollecting(){if(ae.collectionSet.has(this))throw new $i("A circular dependency occurred between signals.",`This can happen when signals reference each other in a loop.
+        Try using the attached stack trace to locate said loop.`);ae.collectionSet.add(this),ae.collectionStack.push(this)}finishCollecting(){if(ae.collectionSet.delete(this),ae.collectionStack.pop()!==this)throw new Error("collectStart/collectEnd was called out of order.")}clearDependencies(){this.dependencies.forEach(e=>e.unsubscribe(this.markDirty)),this.dependencies.clear()}collect(){const e=ae.collectionStack.at(-1);e&&(e.dependencies.add(this.event.subscribable),this.event.subscribe(e.markDirty))}dispose(){this.clearDependencies(),this.event.clear(),this.owner=null}async toPromise(){do await ae.consumePromises(),this.invokable();while(ae.hasPromises());return this.invokable}}ae.collectionSet=new Set;ae.collectionStack=[];ae.promises=[];const jt=Symbol.for("@motion-canvas/core/signals/default");function Ye(n){return typeof n=="function"}function xt(n,e){return Ye(n)?()=>e(n()):e(n)}function ot(n){return Ye(n)?n():n}class kt extends ae{constructor(e,t,r=void 0,s=h=>h,a={}){super(r),this.initial=e,this.interpolation=t,this.parser=s,this.tweening=!1,Object.defineProperty(this.invokable,"reset",{value:this.reset.bind(this)}),Object.defineProperty(this.invokable,"save",{value:this.save.bind(this)}),Object.defineProperty(this.invokable,"isInitial",{value:this.isInitial.bind(this)}),this.initial!==void 0&&(this.current=this.initial,this.markDirty(),Ye(this.initial)||(this.last=this.parse(this.initial))),this.extensions={getter:this.getter.bind(this),setter:this.setter.bind(this),tweener:this.tweener.bind(this),...a}}toSignal(){return this.invokable}parse(e){return this.parser(e)}set(e){return this.extensions.setter(e),this.owner}setter(e){return e===jt&&(e=this.initial),this.current===e?this.owner:(this.current=e,this.clearDependencies(),Ye(e)||(this.last=this.parse(e)),this.markDirty(),this.owner)}get(){return this.extensions.getter()}getter(){if(this.event.isRaised()&&Ye(this.current)){this.clearDependencies(),this.startCollecting();try{this.last=this.parse(this.current())}catch(e){ge().error({...Ei(e),inspect:this.owner?.key})}this.finishCollecting()}return this.event.reset(),this.collect(),this.last}invoke(e,t,r=_e,s=this.interpolation){return e===void 0?this.get():t===void 0?this.set(e):this.createQueue(r,s).to(e,t)}createQueue(e,t){const r=this.get(),s=[],a=xi("animation chain",function*(){for(;s.length>0;)yield*s.shift()});return a.to=(h,c,g=e,y=t)=>(e=g,t=y,s.push(this.tween(h,c,g,y)),a),a.back=(h,c=e,g=t)=>(e=c,t=g,s.push(this.tween(r,h,e,t)),a),a.wait=h=>(s.push(Rr(h)),a),a.run=h=>(s.push(h),a),a.do=h=>(s.push(xi(function*(){h()})),a),a}*tween(e,t,r,s){e===jt&&(e=this.initial),this.tweening=!0,yield*this.extensions.tweener(e,t,r,s),this.set(e),this.tweening=!1}*tweener(e,t,r,s){const a=this.get();yield*je(t,h=>{this.set(s(a,this.parse(ot(e)),r(h)))})}dispose(){super.dispose(),this.initial=void 0,this.current=void 0,this.last=void 0}reset(){return this.initial!==void 0&&this.set(this.initial),this.owner}save(){return this.set(this.get())}isInitial(){return this.collect(),this.current===this.initial}getInitial(){return this.initial}raw(){return this.current}isTweening(){return this.tweening}}class Pr extends kt{constructor(e,t,r,s,a=void 0,h={}){var c;super(void 0,s,a,t,h),this.entries=e,this.signals=[],this.parser=t;for(const g of e){let y,C;Array.isArray(g)?([y,C]=g,(c=C.context).owner??(c.owner=this)):(y=g,C=new kt(xt(r,I=>t(I)[g]),K,a??this.invokable).toSignal()),this.signals.push([y,C]),Object.defineProperty(this.invokable,y,{value:C})}}toSignal(){return this.invokable}parse(e){return this.parser(e)}getter(){return this.parse(Object.fromEntries(this.signals.map(([e,t])=>[e,t()])))}setter(e){if(Ye(e))for(const[t,r]of this.signals)r(()=>this.parser(e())[t]);else{const t=this.parse(e);for(const[r,s]of this.signals)s(t[r])}return this.owner}reset(){for(const[,e]of this.signals)e.reset();return this.owner}save(){for(const[,e]of this.signals)e.save();return this.owner}isInitial(){for(const[,e]of this.signals)if(!e.isInitial())return!1;return!0}raw(){return Object.fromEntries(this.signals.map(([e,t])=>[e,t.context.raw()]))}}class uu extends ae{constructor(e,t){super(t),this.factory=e,this.markDirty()}toSignal(){return this.invokable}dispose(){super.dispose(),this.last=void 0}invoke(...e){if(this.event.isRaised()){this.clearDependencies(),this.startCollecting();try{this.last=this.factory(...e)}catch(t){ge().error({...Ei(t),inspect:this.owner?.key})}this.finishCollecting()}return this.event.reset(),this.collect(),this.last}}class Wi extends Pr{constructor(e,t,r,s,a=void 0,h={}){super(e,t,r,s,a,h),Object.defineProperty(this.invokable,"edit",{value:this.edit.bind(this)}),Object.defineProperty(this.invokable,"mul",{value:this.mul.bind(this)}),Object.defineProperty(this.invokable,"div",{value:this.div.bind(this)}),Object.defineProperty(this.invokable,"add",{value:this.add.bind(this)}),Object.defineProperty(this.invokable,"sub",{value:this.sub.bind(this)}),Object.defineProperty(this.invokable,"dot",{value:this.dot.bind(this)}),Object.defineProperty(this.invokable,"cross",{value:this.cross.bind(this)}),Object.defineProperty(this.invokable,"mod",{value:this.mod.bind(this)})}toSignal(){return this.invokable}edit(e,t,r,s){const a=e(this.get());return this.invoke(a,t,r,s)}mul(e,t,r,s){const a=h=>h.mul(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}div(e,t,r,s){const a=h=>h.div(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}add(e,t,r,s){const a=h=>h.add(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}sub(e,t,r,s){const a=h=>h.sub(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}dot(e,t,r,s){const a=h=>h.dot(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}cross(e,t,r,s){const a=h=>h.cross(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}mod(e,t,r,s){const a=h=>h.mod(e);return t===void 0?this.edit(a):this.edit(a,t,r,s)}}function fu(n,e){return new uu(n,e).toSignal()}function Nt(n,e=Dt,t){return new kt(n,e,t).toSignal()}class Ee{static createSignal(e,t=Ee.lerp){return new Pr(["top","right","bottom","left"],r=>new Ee(r),e,t).toSignal()}static lerp(e,t,r){return new Ee(K(e.top,t.top,r),K(e.right,t.right,r),K(e.bottom,t.bottom,r),K(e.left,t.left,r))}get x(){return this.left+this.right}get y(){return this.top+this.bottom}constructor(e=0,t,r,s){if(this.top=0,this.right=0,this.bottom=0,this.left=0,e!=null){if(Array.isArray(e)&&(s=e[3],r=e[2],t=e[1],e=e[0]),typeof e=="number"){this.top=e,this.right=t!==void 0?t:e,this.bottom=r!==void 0?r:e,this.left=s!==void 0?s:t!==void 0?t:e;return}this.top=e.top,this.right=e.right,this.bottom=e.bottom,this.left=e.left}}lerp(e,t){return Ee.lerp(this,e,t)}scale(e){return new Ee(this.top*e,this.right*e,this.bottom*e,this.left*e)}addScalar(e){return new Ee(this.top+e,this.right+e,this.bottom+e,this.left+e)}toSymbol(){return Ee.symbol}toString(){return`Spacing(${this.top}, ${this.right}, ${this.bottom}, ${this.left})`}toUniform(e,t){e.uniform4f(t,this.top,this.right,this.bottom,this.left)}serialize(){return{top:this.top,right:this.right,bottom:this.bottom,left:this.left}}}Ee.symbol=Symbol.for("@motion-canvas/core/types/Spacing");const Ht=1e-6;class re{static fromRotation(e){return re.identity.rotate(e)}static fromTranslation(e){return re.identity.translate(new v(e))}static fromScaling(e){return re.identity.scale(new v(e))}get x(){return new v(this.values[0],this.values[1])}get y(){return new v(this.values[2],this.values[3])}get scaleX(){return this.values[0]}set scaleX(e){this.values[0]=this.x.normalized.scale(e).x}get skewX(){return this.values[1]}set skewX(e){this.values[1]=e}get scaleY(){return this.values[3]}set scaleY(e){this.values[3]=this.y.normalized.scale(e).y}get skewY(){return this.values[2]}set skewY(e){this.values[2]=e}get translateX(){return this.values[4]}set translateX(e){this.values[4]=e}get translateY(){return this.values[5]}set translateY(e){this.values[5]=e}get rotation(){return v.degrees(this.values[0],this.values[1])}set rotation(e){const t=this.rotate(e-this.rotation);this.values[0]=t.values[0],this.values[1]=t.values[1],this.values[2]=t.values[2],this.values[3]=t.values[3]}get translation(){return new v(this.values[4],this.values[5])}set translation(e){const t=new v(e);this.values[4]=t.x,this.values[5]=t.y}get scaling(){return new v(this.values[0],this.values[3])}set scaling(e){const t=new v(e),r=new v(this.values[0],this.values[1]).normalized,s=new v(this.values[2],this.values[3]).normalized;this.values[0]=r.x*t.x,this.values[1]=r.y*t.y,this.values[2]=s.x*t.x,this.values[3]=s.y*t.y}get inverse(){const e=this.values[0],t=this.values[1],r=this.values[2],s=this.values[3],a=this.values[4],h=this.values[5];let c=e*s-t*r;return c?(c=1/c,new re(s*c,-t*c,-r*c,e*c,(r*h-s*a)*c,(t*a-e*h)*c)):null}get determinant(){return this.values[0]*this.values[3]-this.values[1]*this.values[2]}get domMatrix(){return new DOMMatrix([this.values[0],this.values[1],this.values[2],this.values[3],this.values[4],this.values[5]])}constructor(e,t,r,s,a,h){if(this.values=new Float32Array(6),arguments.length===0){this.values=new Float32Array([1,0,0,1,0,0]);return}if(arguments.length===6){this.values[0]=e,this.values[1]=t,this.values[2]=r,this.values[3]=s,this.values[4]=a,this.values[5]=h;return}if(e instanceof DOMMatrix){this.values[0]=e.m11,this.values[1]=e.m12,this.values[2]=e.m21,this.values[3]=e.m22,this.values[4]=e.m41,this.values[5]=e.m42;return}if(e instanceof re){this.values=e.values;return}if(Array.isArray(e)){if(e.length===2){this.values[0]=e[0],this.values[1]=e[1],this.values[2]=t[0],this.values[3]=t[1],this.values[4]=r[0],this.values[5]=r[1];return}if(e.length===3){const C=new v(e[0]),I=new v(e[1]),q=new v(e[2]);this.values[0]=C.x,this.values[1]=C.y,this.values[2]=I.x,this.values[3]=I.y,this.values[4]=q.x,this.values[5]=q.y;return}this.values[0]=e[0],this.values[1]=e[1],this.values[2]=e[2],this.values[3]=e[3],this.values[4]=e[4],this.values[5]=e[5];return}const c=new v(e),g=new v(t),y=new v(r);this.values[0]=c.x,this.values[1]=c.y,this.values[2]=g.x,this.values[3]=g.y,this.values[4]=y.x,this.values[5]=y.y}column(e){return new v(this.values[e*2],this.values[e*2+1])}row(e){return[this.values[e],this.values[e+2],this.values[e+4]]}mul(e){const t=this.values[0],r=this.values[1],s=this.values[2],a=this.values[3],h=this.values[4],c=this.values[5],g=e.values[0],y=e.values[1],C=e.values[2],I=e.values[3],q=e.values[4],ve=e.values[5];return new re(t*g+s*y,r*g+a*y,t*C+s*I,r*C+a*I,t*q+s*ve+h,r*q+a*ve+c)}rotate(e,t=!0){t&&(e*=ds);const r=this.values[0],s=this.values[1],a=this.values[2],h=this.values[3],c=this.values[4],g=this.values[5],y=Math.sin(e),C=Math.cos(e);return new re(r*C+a*y,s*C+h*y,r*-y+a*C,s*-y+h*C,c,g)}scale(e){const t=new v(e);return new re(this.values[0]*t.x,this.values[1]*t.x,this.values[2]*t.y,this.values[3]*t.y,this.values[4],this.values[5])}mulScalar(e){return new re(this.values[0]*e,this.values[1]*e,this.values[2]*e,this.values[3]*e,this.values[4]*e,this.values[5]*e)}translate(e){const t=new v(e);return new re(this.values[0],this.values[1],this.values[2],this.values[3],this.values[0]*t.x+this.values[2]*t.y+this.values[4],this.values[1]*t.x+this.values[3]*t.y+this.values[5])}add(e){return new re(this.values[0]+e.values[0],this.values[1]+e.values[1],this.values[2]+e.values[2],this.values[3]+e.values[3],this.values[4]+e.values[4],this.values[5]+e.values[5])}sub(e){return new re(this.values[0]-e.values[0],this.values[1]-e.values[1],this.values[2]-e.values[2],this.values[3]-e.values[3],this.values[4]-e.values[4],this.values[5]-e.values[5])}toSymbol(){return re.symbol}toUniform(e,t){e.uniformMatrix3fv(t,!1,[this.values[0],this.values[1],0,this.values[2],this.values[3],0,this.values[4],this.values[5],1])}equals(e,t=Ht){return Math.abs(this.values[0]-e.values[0])<=t+Number.EPSILON&&Math.abs(this.values[1]-e.values[1])<=t+Number.EPSILON&&Math.abs(this.values[2]-e.values[2])<=t+Number.EPSILON&&Math.abs(this.values[3]-e.values[3])<=t+Number.EPSILON&&Math.abs(this.values[4]-e.values[4])<=t+Number.EPSILON&&Math.abs(this.values[5]-e.values[5])<=t+Number.EPSILON}exactlyEquals(e){return this.values[0]===e.values[0]&&this.values[1]===e.values[1]&&this.values[2]===e.values[2]&&this.values[3]===e.values[3]&&this.values[4]===e.values[4]&&this.values[5]===e.values[5]}}re.symbol=Symbol.for("@motion-canvas/core/types/Matrix2D");re.identity=new re(1,0,0,1,0,0);re.zero=new re(0,0,0,0,0,0);var Ci;(function(n){n[n.Vertical=1]="Vertical",n[n.Horizontal=2]="Horizontal"})(Ci||(Ci={}));var ye;(function(n){n[n.Top=4]="Top",n[n.Bottom=8]="Bottom",n[n.Left=16]="Left",n[n.Right=32]="Right"})(ye||(ye={}));var se;(function(n){n[n.Middle=3]="Middle",n[n.Top=5]="Top",n[n.Bottom=9]="Bottom",n[n.Left=18]="Left",n[n.Right=34]="Right",n[n.TopLeft=20]="TopLeft",n[n.TopRight=36]="TopRight",n[n.BottomLeft=24]="BottomLeft",n[n.BottomRight=40]="BottomRight"})(se||(se={}));function du(n){if(n===se.Middle)return v.zero;let e=0;n&ye.Left?e=-1:n&ye.Right&&(e=1);let t=0;return n&ye.Top?t=-1:n&ye.Bottom&&(t=1),new v(e,t)}class v{static createSignal(e,t=v.lerp,r){return new Wi(["x","y"],s=>new 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c=v.fromRadians(a),g=v.fromRadians(h);return[{position:this.center.add(c.scale(this.radius)),tangent:this.counter?c:c.flipped,normal:this.counter?c.flipped:c},{position:this.center.add(g.scale(this.radius)),tangent:this.counter?g.flipped:g,normal:this.counter?g.flipped:g}]}getPoint(e){const t=this.counter?-1:1,r=this.from.radians+e*this.angle*t,s=v.fromRadians(r);return{position:this.center.add(s.scale(this.radius)),tangent:this.counter?s:s.flipped,normal:this.counter?s:s.flipped}}}class me{static constant(e){return new me(e)}static linear(e,t){return new me(e,t)}static quadratic(e,t,r){return new me(e,t,r)}static cubic(e,t,r,s){return new me(e,t,r,s)}get degree(){return this.c3!==0?3:this.c2!==0?2:this.c1!==0?1:0}constructor(e,t,r,s){this.c0=e,this.c1=t??0,this.c2=r??0,this.c3=s??0}differentiate(e=1){switch(e){case 0:return this;case 1:return new me(this.c1,2*this.c2,3*this.c3,0);case 2:return new me(2*this.c2,6*this.c3,0,0);case 3:return new me(6*this.c3,0,0,0);default:throw new Error("Unsupported derivative")}}eval(e,t=0){return t!==0?this.differentiate(t).eval(e):this.c3*(e*e*e)+this.c2*(e*e)+this.c1*e+this.c0}split(e){const t=1-e,r=new me(this.c0,this.c1*e,this.c2*e*e,this.c3*e*e*e),s=new me(this.eval(0),t*this.differentiate(1).eval(e),t*t/2*this.differentiate(2).eval(e),t*t*t/6*this.differentiate(3).eval(e));return[r,s]}roots(){switch(this.degree){case 3:return this.solveCubicRoots();case 2:return this.solveQuadraticRoots();case 1:return this.solveLinearRoot();case 0:return[];default:throw new Error(`Unsupported polynomial degree: ${this.degree}`)}}localExtrema(){return this.differentiate().roots()}localExtrema01(){const e=this.localExtrema(),t=[];for(let r=0;r<e.length;r++){const s=e[r];s>=0&&s<=1&&t.push(e[r])}return t}outputRange01(){let e=[this.eval(0),this.eval(1)];const t=r=>{e[1]>e[0]?e=[Math.min(e[0],r),Math.max(e[1],r)]:e=[Math.min(e[1],r),Math.max(e[0],r)]};return this.localExtrema01().forEach(r=>t(this.eval(r))),e}solveCubicRoots(){const e=this.c0,t=this.c1,r=this.c2,s=this.c3,a=e*e,h=e*r,c=t*t,g=(3*h-c)/(3*a),y=(2*c*t-9*h*t+27*a*s)/(27*a*e),C=this.solveDepressedCubicRoots(g,y),I=q=>q-t/(3*e);switch(C.length){case 1:return[I(C[0])];case 2:return[I(C[0]),I(C[1])];case 3:return[I(C[0]),I(C[1]),I(C[2])];default:return[]}}solveDepressedCubicRoots(e,t){if(this.almostZero(e))return[Math.cbrt(-t)];const r=Math.PI*2,s=4*e*e*e+27*t*t;if(s<1e-5){const a=2*Math.sqrt(-e/3),h=3*t/(2*e)*Math.sqrt(-3/e),c=g=>a*Math.cos(1/3*Math.acos(pe(-1,1,h))-r/3*g);return h>=.9999?[c(0),c(2)]:h<=-.9999?[c(1),c(2)]:[c(0),c(1),c(2)]}if(s>0&&e<0){const a=.3333333333333333*Math.acosh(-3*Math.abs(t)/(2*e)*Math.sqrt(-3/e));return[-2*Math.sign(t)*Math.sqrt(-e/3)*Math.cosh(a)]}if(e>0){const a=.3333333333333333*Math.asinh(3*t/(2*e)*Math.sqrt(3/e));return[-2*Math.sqrt(e/3)*Math.sinh(a)]}return[]}solveQuadraticRoots(){const e=this.c2,t=this.c1,r=this.c0,s=t*t-4*e*r;if(this.almostZero(s))return[-t/(2*e)];if(s>=0){const a=Math.sqrt(s),h=(-t-a)/(2*e),c=(-t+a)/(2*e);return[Math.min(h,c),Math.max(h,c)]}return[]}solveLinearRoot(){return[-this.c0/this.c1]}almostZero(e){return Math.abs(0-e)<=Number.EPSILON}}class Yt{constructor(e,t,r,s){this.c0=e,this.c1=t,this.c2=r,this.c3=s,e instanceof me?(this.x=e,this.y=t):s!==void 0?(this.x=new me(e.x,t.x,r.x,s.x),this.y=new me(e.y,t.y,r.y,s.y)):(this.x=new me(e.x,t.x,r.x),this.y=new me(e.y,t.y,r.y))}eval(e,t=0){return new v(this.x.differentiate(t).eval(e),this.y.differentiate(t).eval(e))}split(e){const[t,r]=this.x.split(e),[s,a]=this.y.split(e);return[new Yt(t,s),new Yt(r,a)]}differentiate(e=1){return new Yt(this.x.differentiate(e),this.y.differentiate(e))}evalDerivative(e){return this.differentiate().eval(e)}getBounds(){const e=this.x.outputRange01(),t=this.y.outputRange01();return Z.fromPoints(new v(Math.min(...e),Math.max(...t)),new v(Math.max(...e),Math.min(...t)))}}class Fu{constructor(e,t=20){this.curve=e,this.sampledDistances=[],this.resample(t)}resample(e){this.sampledDistances=[0];let t=0,r=this.curve.eval(0).position;for(let s=1;s<e;s++){const a=s/(e-1),h=this.curve.eval(a),c=r.sub(h.position).magnitude;t+=c,this.sampledDistances.push(t),r=h.position}this.sampledDistances[this.sampledDistances.length-1]=this.curve.arcLength}pointAtDistance(e){return this.curve.eval(this.distanceToT(e))}distanceToT(e){const t=this.sampledDistances.length;e=pe(0,this.curve.arcLength,e);for(let r=0;r<t;r++){const s=this.sampledDistances[r],a=this.sampledDistances[r+1];if(e>=s&&e<=a)return Ni(s,a,r/(t-1),(r+1)/(t-1),e)}return 1}}class zu extends Ls{get arcLength(){return this.length}constructor(e,t){super(),this.curve=e,this.length=t,this.pointSampler=new Fu(this)}getBBox(){return this.curve.getBounds()}eval(e){const t=this.tangent(e);return{position:this.curve.eval(e),tangent:t,normal:t.perpendicular}}getPoint(e){const t=this.pointSampler.pointAtDistance(this.arcLength*e);return{position:t.position,tangent:t.tangent,normal:t.tangent.perpendicular}}transformPoints(e){return this.points.map(t=>t.transformAsPoint(e))}tangent(e){return this.curve.evalDerivative(e).normalized}draw(e,t=0,r=1,s=!0){let a=null,h=t,c=r,g=this.points;if(t!==0||r!==1){const I=this.length*t,q=this.length*r;h=this.pointSampler.distanceToT(I),c=this.pointSampler.distanceToT(q);const ve=(c-h)/(1-h),[,xe]=this.split(h);[a]=xe.split(ve),g=a.points}s&&Lr(e,g[0]),(a??this).doDraw(e);const y=this.tangent(h),C=this.tangent(c);return[{position:g[0],tangent:y,normal:y.perpendicular},{position:g.at(-1),tangent:C,normal:C.perpendicular}]}}var Iu=function(n,e,t,r){var s=arguments.length,a=s<3?e:r===null?r=Object.getOwnPropertyDescriptor(e,t):r,h;if(typeof Reflect=="object"&&typeof Reflect.decorate=="function")a=Reflect.decorate(n,e,t,r);else for(var c=n.length-1;c>=0;c--)(h=n[c])&&(a=(s<3?h(a):s>3?h(e,t,a):h(e,t))||a);return s>3&&a&&Object.defineProperty(e,t,a),a};class rt extends zu{get points(){return[this.p0,this.p1,this.p2,this.p3]}constructor(e,t,r,s){super(new Yt(e,e.flipped.add(t).scale(3),e.scale(3).sub(t.scale(6)).add(r.scale(3)),e.flipped.add(t.scale(3)).sub(r.scale(3)).add(s)),rt.getLength(e,t,r,s)),this.p0=e,this.p1=t,this.p2=r,this.p3=s}split(e){const t=new v(this.p0.x+(this.p1.x-this.p0.x)*e,this.p0.y+(this.p1.y-this.p0.y)*e),r=new v(this.p1.x+(this.p2.x-this.p1.x)*e,this.p1.y+(this.p2.y-this.p1.y)*e),s=new v(this.p2.x+(this.p3.x-this.p2.x)*e,this.p2.y+(this.p3.y-this.p2.y)*e),a=new v(t.x+(r.x-t.x)*e,t.y+(r.y-t.y)*e),h=new v(r.x+(s.x-r.x)*e,r.y+(s.y-r.y)*e),c=new v(a.x+(h.x-a.x)*e,a.y+(h.y-a.y)*e),g=new rt(this.p0,t,a,c),y=new rt(c,h,s,this.p3);return[g,y]}doDraw(e){Ru(e,this.p1,this.p2,this.p3)}static getLength(e,t,r,s){return rt.el.setAttribute("d",`M ${e.x} ${e.y} C ${t.x} ${t.y} ${r.x} ${r.y} ${s.x} 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+    <style rel="stylesheet" crossorigin>html,body,#stage{margin:0;width:100%;height:100%;overflow:hidden;background:#11131a}#stage{display:grid;place-items:center}#stage canvas{width:100%;height:100%;display:block}</style>
+  </head>
+  <body>
+    <div id="stage"></div>
+  </body>
+</html>
diff --git a/plugins/motion-canvas-studio/package-lock.json b/plugins/motion-canvas-studio/package-lock.json
new file mode 100644
index 00000000..1ac01c1e
--- /dev/null
+++ b/plugins/motion-canvas-studio/package-lock.json
@@ -0,0 +1,1763 @@
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "micromatch": "^4.0.8"
+      },
+      "engines": {
+        "node": ">18.0.0"
+      },
+      "peerDependencies": {
+        "rollup": "^4.59.0",
+        "vite": "^5.4.21 || ^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "rollup": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vite/node_modules/picomatch": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.5.tgz",
+      "integrity": "sha512-RvwwcruNjI1ncT5xRakeyS9Lf8lcItv34KD+aif+VH9kduAyfYBipGh12274xtenIPZ119/R9BdTBa8gAwSh0A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/vscode-oniguruma": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/vscode-oniguruma/-/vscode-oniguruma-1.7.0.tgz",
+      "integrity": "sha512-L9WMGRfrjOhgHSdOYgCt/yRMsXzLDJSL7BPrOZt73gU0iWO4mpqzqQzOz5srxqTvMBaR0XZTSrVWo4j55Rc6cA==",
+      "license": "MIT"
+    },
+    "node_modules/vscode-textmate": {
+      "version": "9.3.2",
+      "resolved": "https://registry.npmjs.org/vscode-textmate/-/vscode-textmate-9.3.2.tgz",
+      "integrity": "sha512-n2uGbUcrjhUEBH16uGA0TvUfhWwliFZ1e3+pTjrkim1Mt7ydB41lV08aUvsi70OlzDWp6X7Bx3w/x3fAXIsN0Q==",
+      "license": "MIT"
+    },
+    "node_modules/w3c-keyname": {
+      "version": "2.2.8",
+      "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
+      "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
+      "license": "MIT"
+    },
+    "node_modules/wicked-good-xpath": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/wicked-good-xpath/-/wicked-good-xpath-1.3.0.tgz",
+      "integrity": "sha512-Gd9+TUn5nXdwj/hFsPVx5cuHHiF5Bwuc30jZ4+ronF1qHK5O7HD0sgmXWSEgwKquT3ClLoKPVbO6qGwVwLzvAw==",
+      "license": "MIT"
+    },
+    "renderer": {
+      "name": "@opentake/motion-canvas-runner",
+      "version": "0.1.0-beta.1",
+      "dev": true,
+      "license": "MIT"
+    }
+  }
+}
diff --git a/plugins/motion-canvas-studio/package.json b/plugins/motion-canvas-studio/package.json
new file mode 100644
index 00000000..8ce626af
--- /dev/null
+++ b/plugins/motion-canvas-studio/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "@opentake/motion-canvas-studio",
+  "version": "0.1.0-beta.1",
+  "private": true,
+  "type": "module",
+  "license": "MIT",
+  "scripts": {
+    "build": "tsc --noEmit && vite build && vite build --config vite.runner.config.ts && node scripts/normalize-bundle.mjs",
+    "test": "node --experimental-strip-types --test src/job.test.ts",
+    "licenses": "node scripts/check-licenses.mjs"
+  },
+  "dependencies": {
+    "@motion-canvas/2d": "3.17.2",
+    "@motion-canvas/core": "3.17.2"
+  },
+  "devDependencies": {
+    "@motion-canvas/vite-plugin": "3.17.2",
+    "@opentake/motion-canvas-runner": "file:./renderer",
+    "@types/node": "22.10.2",
+    "typescript": "5.6.3",
+    "vite": "7.3.6",
+    "vite-plugin-singlefile": "2.3.3"
+  }
+}
diff --git a/plugins/motion-canvas-studio/renderer/editor.html b/plugins/motion-canvas-studio/renderer/editor.html
new file mode 100644
index 00000000..36e38d94
--- /dev/null
+++ b/plugins/motion-canvas-studio/renderer/editor.html
@@ -0,0 +1 @@
+<!doctype html><html><head><style>{{style}}</style></head><body><script type="module" src="{{source}}"></script></body></html>
diff --git a/plugins/motion-canvas-studio/renderer/entry.js b/plugins/motion-canvas-studio/renderer/entry.js
new file mode 100644
index 00000000..808e645a
--- /dev/null
+++ b/plugins/motion-canvas-studio/renderer/entry.js
@@ -0,0 +1,5 @@
+import project from '../.motion-build/project.js';
+import './style.css';
+import {editor} from './main.js';
+
+await editor(project);
diff --git a/plugins/motion-canvas-studio/renderer/main.js b/plugins/motion-canvas-studio/renderer/main.js
new file mode 100644
index 00000000..0e37b54e
--- /dev/null
+++ b/plugins/motion-canvas-studio/renderer/main.js
@@ -0,0 +1,31 @@
+import {Renderer, Vector2} from '@motion-canvas/core';
+import {parseMotionCanvasJob} from '../src/job';
+
+export function index() {
+  throw new Error('OpenTake Motion Canvas runner requires exactly one project');
+}
+
+export async function editor(project) {
+  const job = parseMotionCanvasJob(window.__OPENTAKE_MOTION_CONFIG__);
+  const config = {...job.params, ...job};
+  window.__OPENTAKE_MOTION_CONFIG__ = config;
+  const fps = Math.max(1, Math.round(config.fps ?? 30));
+  const width = Math.max(2, Math.round(config.width ?? 1920));
+  const height = Math.max(2, Math.round(config.height ?? 1080));
+  const size = new Vector2(width, height);
+  const renderer = new Renderer(project);
+  document.getElementById('stage').append(renderer.stage.finalBuffer);
+  const settings = {
+    name: 'OpenTake Motion Canvas Studio',
+    range: [0, Math.max(1, config.durationSeconds ?? 3)],
+    fps,
+    size,
+    resolutionScale: 1,
+    colorSpace: 'srgb',
+    background: config.background ?? '#11131a',
+    exporter: {name: '@motion-canvas/core/image-sequence', options: {}},
+  };
+
+  window.OpenTake.onSeek(seconds => renderer.renderFrame(settings, Math.max(0, seconds)));
+  window.__OPENTAKE_MOTION_CANVAS_READY__ = true;
+}
diff --git a/plugins/motion-canvas-studio/renderer/package.json b/plugins/motion-canvas-studio/renderer/package.json
new file mode 100644
index 00000000..46b2828b
--- /dev/null
+++ b/plugins/motion-canvas-studio/renderer/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "@opentake/motion-canvas-runner",
+  "version": "0.1.0-beta.1",
+  "private": true,
+  "type": "module",
+  "license": "MIT",
+  "main": "main.js"
+}
diff --git a/plugins/motion-canvas-studio/renderer/style.css b/plugins/motion-canvas-studio/renderer/style.css
new file mode 100644
index 00000000..e932635a
--- /dev/null
+++ b/plugins/motion-canvas-studio/renderer/style.css
@@ -0,0 +1,3 @@
+html, body, #stage { margin: 0; width: 100%; height: 100%; overflow: hidden; background: #11131a; }
+#stage { display: grid; place-items: center; }
+#stage canvas { width: 100%; height: 100%; display: block; }
diff --git a/plugins/motion-canvas-studio/runner.html b/plugins/motion-canvas-studio/runner.html
new file mode 100644
index 00000000..e54983a5
--- /dev/null
+++ b/plugins/motion-canvas-studio/runner.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <script>
+      window.__OPENTAKE_MOTION_CONFIG__ = __OPENTAKE_MOTION_CONFIG_JSON__;
+    </script>
+  </head>
+  <body>
+    <div id="stage"></div>
+    <script type="module" src="/renderer/entry.js"></script>
+  </body>
+</html>
diff --git a/plugins/motion-canvas-studio/scripts/check-licenses.mjs b/plugins/motion-canvas-studio/scripts/check-licenses.mjs
new file mode 100644
index 00000000..7dac0629
--- /dev/null
+++ b/plugins/motion-canvas-studio/scripts/check-licenses.mjs
@@ -0,0 +1,21 @@
+import assert from 'node:assert/strict';
+import {readFile} from 'node:fs/promises';
+
+const lock = JSON.parse(await readFile(new URL('../package-lock.json', import.meta.url), 'utf8'));
+const allowed = new Set([
+  'Apache-2.0',
+  'BSD-3-Clause',
+  'ISC',
+  'MIT',
+  '(BSD-3-Clause AND Apache-2.0)',
+]);
+const rejected = [];
+for (const [path, metadata] of Object.entries(lock.packages)) {
+  if (!path) continue;
+  const license = metadata.license ?? (metadata.link ? lock.packages[metadata.resolved]?.license : undefined);
+  if (!license || !allowed.has(license)) {
+    rejected.push(`${path}: ${license ?? 'missing license'}`);
+  }
+}
+assert.deepEqual(rejected, [], `unapproved dependency licenses:\n${rejected.join('\n')}`);
+console.log(`verified ${Object.keys(lock.packages).length - 1} locked package license records`);
diff --git a/plugins/motion-canvas-studio/scripts/normalize-bundle.mjs b/plugins/motion-canvas-studio/scripts/normalize-bundle.mjs
new file mode 100644
index 00000000..e23b3fbf
--- /dev/null
+++ b/plugins/motion-canvas-studio/scripts/normalize-bundle.mjs
@@ -0,0 +1,6 @@
+import {readFile, writeFile} from 'node:fs/promises';
+
+const bundle = new URL('../bundle/runner.html', import.meta.url);
+const source = await readFile(bundle, 'utf8');
+const normalized = `${source.replace(/[\t ]+$/gm, '').trimEnd()}\n`;
+await writeFile(bundle, normalized);
diff --git a/plugins/motion-canvas-studio/src/job.test.ts b/plugins/motion-canvas-studio/src/job.test.ts
new file mode 100644
index 00000000..79f4286e
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/job.test.ts
@@ -0,0 +1,48 @@
+import assert from 'node:assert/strict';
+import {describe, it} from 'node:test';
+import {parseMotionCanvasJob, resultMetadata} from './job.ts';
+
+describe('Motion Canvas job contract', () => {
+  it('normalizes the fixed template and produces deterministic result metadata', () => {
+    const raw = {
+      templateId: 'title-card',
+      params: {title: 'Beta', subtitle: 'OpenTake', accent: '#7c5cff', background: '#11131a'},
+      fps: 24,
+      width: 1920,
+      height: 1080,
+      durationFrames: 72,
+    };
+    const first = parseMotionCanvasJob(raw);
+    const second = parseMotionCanvasJob(structuredClone(raw));
+    assert.deepEqual(second, first);
+    assert.deepEqual(
+      resultMetadata(first, 'ab'.repeat(32)),
+      resultMetadata(second, 'ab'.repeat(32)),
+    );
+  });
+
+  it('rejects traversal-like templates and malformed dimensions', () => {
+    assert.throws(
+      () => parseMotionCanvasJob({
+        templateId: '../title-card',
+        params: {},
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        durationFrames: 90,
+      }),
+      /unsupported/,
+    );
+    assert.throws(
+      () => parseMotionCanvasJob({
+        templateId: 'title-card',
+        params: {title: '', subtitle: '', accent: '', background: ''},
+        fps: 30,
+        width: 0,
+        height: 1080,
+        durationFrames: 90,
+      }),
+      /width/,
+    );
+  });
+});
diff --git a/plugins/motion-canvas-studio/src/job.ts b/plugins/motion-canvas-studio/src/job.ts
new file mode 100644
index 00000000..a76eac03
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/job.ts
@@ -0,0 +1,78 @@
+export interface MotionCanvasJob {
+  templateId: 'title-card';
+  params: {
+    title: string;
+    subtitle: string;
+    accent: string;
+    background: string;
+  };
+  fps: number;
+  width: number;
+  height: number;
+  durationFrames: number;
+  durationSeconds: number;
+}
+
+export interface MotionCanvasResult {
+  renderer: 'motion-canvas';
+  rendererVersion: '3.17.2';
+  outputFile: 'output.mp4';
+  fps: number;
+  width: number;
+  height: number;
+  durationFrames: number;
+  durationSeconds: number;
+  contentHash: string;
+}
+
+export function parseMotionCanvasJob(value: unknown): MotionCanvasJob {
+  if (!value || typeof value !== 'object') throw new Error('motion job must be an object');
+  const job = value as Record<string, unknown>;
+  if (job.templateId !== 'title-card') throw new Error('unsupported Motion Canvas template');
+  const positiveInteger = (name: string) => {
+    const candidate = job[name];
+    if (!Number.isInteger(candidate) || Number(candidate) < 1) {
+      throw new Error(`${name} must be a positive integer`);
+    }
+    return Number(candidate);
+  };
+  const fps = positiveInteger('fps');
+  const durationFrames = positiveInteger('durationFrames');
+  const params = job.params;
+  if (!params || typeof params !== 'object') throw new Error('params must be an object');
+  const source = params as Record<string, unknown>;
+  const string = (name: string) => {
+    const candidate = source[name];
+    if (typeof candidate !== 'string') throw new Error(`params.${name} must be a string`);
+    return candidate;
+  };
+  return {
+    templateId: 'title-card',
+    params: {
+      title: string('title'),
+      subtitle: string('subtitle'),
+      accent: string('accent'),
+      background: string('background'),
+    },
+    fps,
+    width: positiveInteger('width'),
+    height: positiveInteger('height'),
+    durationFrames,
+    durationSeconds: durationFrames / fps,
+  };
+}
+
+export function resultMetadata(job: MotionCanvasJob, contentHash: string): MotionCanvasResult {
+  if (!/^[0-9a-f]{64}$/.test(contentHash)) throw new Error('content hash must be SHA-256 hex');
+  return {
+    renderer: 'motion-canvas',
+    rendererVersion: '3.17.2',
+    outputFile: 'output.mp4',
+    fps: job.fps,
+    width: job.width,
+    height: job.height,
+    durationFrames: job.durationFrames,
+    durationSeconds: job.durationSeconds,
+    contentHash,
+  };
+}
diff --git a/plugins/motion-canvas-studio/src/motion-canvas.d.ts b/plugins/motion-canvas-studio/src/motion-canvas.d.ts
new file mode 100644
index 00000000..067c6a44
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/motion-canvas.d.ts
@@ -0,0 +1 @@
+/// <reference types="@motion-canvas/core/project" />
diff --git a/plugins/motion-canvas-studio/src/project.meta b/plugins/motion-canvas-studio/src/project.meta
new file mode 100644
index 00000000..5312ef62
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/project.meta
@@ -0,0 +1,19 @@
+{
+  "version": 1,
+  "shared": {
+    "background": "#11131a",
+    "range": [0, null],
+    "size": {"x": 1920, "y": 1080},
+    "audioOffset": 0
+  },
+  "preview": {"fps": 30, "resolutionScale": 1},
+  "rendering": {
+    "fps": 30,
+    "resolutionScale": 1,
+    "colorSpace": "srgb",
+    "exporter": {
+      "name": "@motion-canvas/core/image-sequence",
+      "options": {"fileType": "image/png", "quality": 100, "groupByScene": false}
+    }
+  }
+}
diff --git a/plugins/motion-canvas-studio/src/project.ts b/plugins/motion-canvas-studio/src/project.ts
new file mode 100644
index 00000000..9225d9d2
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/project.ts
@@ -0,0 +1,7 @@
+import {makeProject} from '@motion-canvas/core';
+import titleCard from './templates/title-card?scene';
+
+export default makeProject({
+  name: 'OpenTake Motion Canvas Studio',
+  scenes: [titleCard],
+});
diff --git a/plugins/motion-canvas-studio/src/templates/title-card.meta b/plugins/motion-canvas-studio/src/templates/title-card.meta
new file mode 100644
index 00000000..aac3a8fe
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/templates/title-card.meta
@@ -0,0 +1,5 @@
+{
+  "version": 1,
+  "timeEvents": [],
+  "seed": 1337
+}
diff --git a/plugins/motion-canvas-studio/src/templates/title-card.tsx b/plugins/motion-canvas-studio/src/templates/title-card.tsx
new file mode 100644
index 00000000..1f2433a2
--- /dev/null
+++ b/plugins/motion-canvas-studio/src/templates/title-card.tsx
@@ -0,0 +1,75 @@
+import {Layout, Rect, Txt, makeScene2D} from '@motion-canvas/2d';
+import {all, createRef, easeOutCubic, waitFor} from '@motion-canvas/core';
+
+interface OpenTakeMotionConfig {
+  title?: string;
+  subtitle?: string;
+  accent?: string;
+  background?: string;
+  durationSeconds?: number;
+  width?: number;
+  height?: number;
+}
+
+declare global {
+  interface Window {
+    __OPENTAKE_MOTION_CONFIG__?: OpenTakeMotionConfig;
+  }
+}
+
+export default makeScene2D(function* (view) {
+  const config = window.__OPENTAKE_MOTION_CONFIG__ ?? {};
+  const card = createRef<Rect>();
+  const bar = createRef<Rect>();
+  const duration = Math.max(0.7, config.durationSeconds ?? 3);
+  // Keep the 1920×1080 design geometry valid on every accepted project
+  // canvas, including the deliberately tiny 64×36 native acceptance case.
+  const scale = Math.max(
+    Number.EPSILON,
+    Math.min((config.width ?? 1920) / 1920, (config.height ?? 1080) / 1080),
+  );
+
+  view.fill(config.background ?? '#11131a');
+  view.add(
+    <Rect
+      ref={card}
+      width={'72%'}
+      padding={70 * scale}
+      radius={32 * scale}
+      fill={'rgba(255,255,255,0.12)'}
+      stroke={'rgba(255,255,255,0.30)'}
+      lineWidth={2 * scale}
+      opacity={0}
+      y={72 * scale}
+    >
+      <Layout direction={'column'} gap={28 * scale} width={'100%'}>
+        <Rect
+          ref={bar}
+          width={260 * scale}
+          height={10 * scale}
+          radius={5 * scale}
+          fill={config.accent ?? '#7c5cff'}
+        />
+        <Txt
+          text={config.title ?? 'OpenTake'}
+          fill={'#ffffff'}
+          fontFamily={'Arial, sans-serif'}
+          fontSize={92 * scale}
+          fontWeight={700}
+          lineHeight={108 * scale}
+        />
+        <Txt
+          text={config.subtitle ?? 'Motion Canvas'}
+          fill={'rgba(255,255,255,0.76)'}
+          fontFamily={'Arial, sans-serif'}
+          fontSize={42 * scale}
+          lineHeight={54 * scale}
+        />
+      </Layout>
+    </Rect>,
+  );
+
+  yield* all(card().opacity(1, 0.55, easeOutCubic), card().y(0, 0.55, easeOutCubic));
+  yield* bar().width(320 * scale, Math.max(0.1, duration - 0.75), easeOutCubic);
+  yield* waitFor(0.2);
+});
diff --git a/plugins/motion-canvas-studio/tsconfig.json b/plugins/motion-canvas-studio/tsconfig.json
new file mode 100644
index 00000000..b65ccb33
--- /dev/null
+++ b/plugins/motion-canvas-studio/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "skipLibCheck": true,
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "jsx": "react-jsx",
+    "jsxImportSource": "@motion-canvas/2d/lib",
+    "lib": ["ES2022", "DOM"],
+    "types": ["node"]
+  },
+  "include": ["src", "renderer", "vite.config.ts"]
+}
diff --git a/plugins/motion-canvas-studio/vite.config.ts b/plugins/motion-canvas-studio/vite.config.ts
new file mode 100644
index 00000000..bcb4673d
--- /dev/null
+++ b/plugins/motion-canvas-studio/vite.config.ts
@@ -0,0 +1,30 @@
+import {defineConfig} from 'vite';
+import motionCanvasModule from '@motion-canvas/vite-plugin';
+
+const motionCanvas =
+  typeof motionCanvasModule === 'function'
+    ? motionCanvasModule
+    : (motionCanvasModule as unknown as {default: typeof motionCanvasModule}).default;
+
+export default defineConfig({
+  plugins: [
+    motionCanvas({
+      project: './src/project.ts',
+      editor: '@opentake/motion-canvas-runner',
+    }),
+    {
+      name: 'opentake:motion-canvas-vite7-target',
+      enforce: 'post',
+      config: () => ({build: {target: 'esnext'}}),
+    },
+  ],
+  build: {
+    outDir: '.motion-build',
+    target: 'esnext',
+    minify: true,
+    rollupOptions: {
+      external: id => id.startsWith('@motion-canvas/'),
+      output: {entryFileNames: 'project.js'},
+    },
+  },
+});
diff --git a/plugins/motion-canvas-studio/vite.runner.config.ts b/plugins/motion-canvas-studio/vite.runner.config.ts
new file mode 100644
index 00000000..3004d36a
--- /dev/null
+++ b/plugins/motion-canvas-studio/vite.runner.config.ts
@@ -0,0 +1,18 @@
+import {defineConfig} from 'vite';
+import {viteSingleFile} from 'vite-plugin-singlefile';
+
+export default defineConfig({
+  plugins: [viteSingleFile()],
+  build: {
+    outDir: 'bundle',
+    target: 'esnext',
+    minify: true,
+    cssCodeSplit: false,
+    assetsInlineLimit: 100_000_000,
+    emptyOutDir: true,
+    rollupOptions: {
+      input: './runner.html',
+      output: {entryFileNames: 'runner.js'},
+    },
+  },
+});
diff --git a/scripts/check_windows_product_ci.py b/scripts/check_windows_product_ci.py
index 36f13425..db693220 100644
--- a/scripts/check_windows_product_ci.py
+++ b/scripts/check_windows_product_ci.py
@@ -1,12 +1,14 @@
 #!/usr/bin/env python3
 """Fail closed when the native Windows product gate loses required coverage."""
 
+import json
 import re
 from pathlib import Path
 
 
 REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
 WORKFLOW_PATH = REPOSITORY_ROOT / ".github" / "workflows" / "ci.yml"
+TAURI_CONFIG_PATH = REPOSITORY_ROOT / "src-tauri" / "tauri.conf.json"
 NORMAL_JOB_CONDITION = (
     "if: github.event_name != 'workflow_dispatch' || inputs.red_task == 'none'"
 )
@@ -16,14 +18,18 @@
 )
 
 
-def _job_body(workflow: str) -> str | None:
+def _named_job_body(workflow: str, job_name: str) -> str | None:
     match = re.search(
-        r"(?ms)^  windows-product:\n(?P<body>.*?)(?=^  [a-zA-Z0-9_-]+:\n|\Z)",
+        rf"(?ms)^  {re.escape(job_name)}:\n(?P<body>.*?)(?=^  [a-zA-Z0-9_-]+:\n|\Z)",
         workflow,
     )
     return None if match is None else match.group("body")
 
 
+def _job_body(workflow: str) -> str | None:
+    return _named_job_body(workflow, "windows-product")
+
+
 def _steps(job: str) -> list[str]:
     starts = [
         match.start()
@@ -165,6 +171,18 @@ def validate_workflow(workflow: str) -> list[str]:
         if step is None or not _has_line(step, command):
             errors.append(label)
 
+    chromium_motion = _named_step(steps, "Windows Chromium motion capture regression")
+    chromium_motion_fragments = (
+        "renderer::tests::chromium_skeleton_reports_unavailable_not_panic",
+        "virtual_time_network_csp_timeout_cleanup_and_frame_identity",
+        "sandbox_progress_cancel_validated_mp4_result",
+    )
+    if chromium_motion is None or not all(
+        fragment in _active(chromium_motion)
+        for fragment in chromium_motion_fragments
+    ):
+        errors.append("complete Windows Chromium motion regression")
+
     bundle = _named_step(steps, "Build native MSI and NSIS installers")
     bundle_lines = (
         "Remove-Item 'target/release/bundle/msi' -Recurse -Force -ErrorAction SilentlyContinue",
@@ -174,6 +192,20 @@ def validate_workflow(workflow: str) -> list[str]:
     if bundle is None or not all(_has_line(bundle, line) for line in bundle_lines):
         errors.append("clean native Tauri bundle")
 
+    installed_product = _named_step(
+        steps, "Install NSIS package and execute installed product without PATH"
+    )
+    installed_product_fragments = (
+        "packaged_macos_windows_sidecars_resolve_and_execute",
+        "Start-Process -FilePath $application -PassThru",
+        "installed OpenTake exited during launch smoke test",
+    )
+    if installed_product is None or not all(
+        fragment in _active(installed_product)
+        for fragment in installed_product_fragments
+    ):
+        errors.append("installed product launch smoke test")
+
     receipt = _named_step(steps, "Bind installers to the exact source SHA")
     if receipt is None or not _has_line(
         receipt, "RECEIPT_SHA: ${{ steps.bind.outputs.sha }}"
@@ -214,12 +246,68 @@ def validate_workflow(workflow: str) -> list[str]:
     if upload is None or not _has_line(upload, "if-no-files-found: error"):
         errors.append("missing-artifact failure")
 
+    security_job = _named_job_body(workflow, "windows-security")
+    if security_job is None:
+        errors.append("Windows cancellation security job")
+        return errors
+    if "choco install ffmpeg" in _active(security_job):
+        errors.append("no external Chocolatey FFmpeg dependency")
+    security_steps = _steps(security_job)
+    cancellation = _named_step(
+        security_steps, "Portable FFmpeg cancellation lifecycle"
+    )
+    cancellation_fragments = (
+        "OPENTAKE_FFMPEG: ${{ github.workspace }}\\src-tauri\\binaries\\ffmpeg-x86_64-pc-windows-msvc.exe",
+        "& $env:OPENTAKE_FFMPEG -version",
+        "checksum-pinned packaged FFmpeg is not runnable",
+        "windows_cancelling_running_pcm_child_reaps_both_pipe_readers",
+        "windows_cancelling_mux_wait_reaps_child",
+    )
+    if cancellation is None or not all(
+        fragment in _active(cancellation) for fragment in cancellation_fragments
+    ):
+        errors.append("pinned FFmpeg cancellation lifecycle")
+
+    return errors
+
+
+def validate_tauri_config(config_text: str) -> list[str]:
+    try:
+        config = json.loads(config_text)
+    except json.JSONDecodeError:
+        return ["valid Tauri JSON config"]
+
+    app_version = config.get("version")
+    wix_version = (
+        config.get("bundle", {}).get("windows", {}).get("wix", {}).get("version")
+    )
+    errors: list[str] = []
+    if not isinstance(app_version, str) or not app_version:
+        errors.append("public Beta app version")
+    if not isinstance(wix_version, str) or not re.fullmatch(
+        r"\d+\.\d+\.\d+(?:\.\d+)?", wix_version
+    ):
+        errors.append("MSI-compatible numeric Beta version")
+        return errors
+
+    wix_fields = [int(field) for field in wix_version.split(".")]
+    if (
+        wix_fields[0] > 255
+        or wix_fields[1] > 255
+        or any(field > 65_535 for field in wix_fields[2:])
+    ):
+        errors.append("MSI-compatible numeric Beta version")
+    if isinstance(app_version, str):
+        app_core = app_version.split("+", 1)[0].split("-", 1)[0]
+        if app_core != ".".join(str(field) for field in wix_fields[:3]):
+            errors.append("MSI version tracks public app version")
     return errors
 
 
 def main() -> None:
     workflow = WORKFLOW_PATH.read_text(encoding="utf-8")
     errors = validate_workflow(workflow)
+    errors.extend(validate_tauri_config(TAURI_CONFIG_PATH.read_text(encoding="utf-8")))
     if errors:
         raise SystemExit("windows-product is missing: " + ", ".join(errors))
 
diff --git a/scripts/ffmpeg-sidecars.lock.json b/scripts/ffmpeg-sidecars.lock.json
new file mode 100644
index 00000000..a9a1513c
--- /dev/null
+++ b/scripts/ffmpeg-sidecars.lock.json
@@ -0,0 +1,52 @@
+{
+  "schema": "opentake-ffmpeg-sidecars-v2",
+  "release": "Per-target, checksum-pinned redistributable FFmpeg builds",
+  "targets": {
+    "aarch64-apple-darwin": {
+      "ffmpeg": {
+        "url": "https://www.osxexperts.net/ffmpeg7arm.zip",
+        "sha256": "326895b16940f238d76e902fc71150f10c388c281985756f9850ff800a2f1499",
+        "version": "7.0",
+        "archive": {
+          "format": "zip",
+          "member": "ffmpeg",
+          "sha256": "563111a239fe70d2e5c84a5382204a7d0bf0a332385a92a44baff36d313e27f2"
+        }
+      },
+      "ffprobe": {
+        "url": "https://www.osxexperts.net/ffprobe7arm.zip",
+        "sha256": "307e09bc01bd72bde5f441a1a6df68769da3b2b6e431accfbfc9cf3893ad00c4",
+        "version": "7.0",
+        "archive": {
+          "format": "zip",
+          "member": "ffprobe",
+          "sha256": "e5ae34ee2f0b3594892a695fd733646904bbc7eb40af3b359ed91538ddcb5513"
+        }
+      }
+    },
+    "x86_64-apple-darwin": {
+      "ffmpeg": {
+        "url": "https://github.com/eugeneware/ffmpeg-static/releases/download/b6.1.1/ffmpeg-darwin-x64",
+        "sha256": "ebdddc936f61e14049a2d4b549a412b8a40deeff6540e58a9f2a2da9e6b18894",
+        "version": "6.1.1"
+      },
+      "ffprobe": {
+        "url": "https://github.com/eugeneware/ffmpeg-static/releases/download/b6.1.1/ffprobe-darwin-x64",
+        "sha256": "fa3add0ce901f7241abe0dfc0155d958fc834aca3f8ce61f87cc712ae669c1e0",
+        "version": "6.1.1"
+      }
+    },
+    "x86_64-pc-windows-msvc": {
+      "ffmpeg": {
+        "url": "https://github.com/eugeneware/ffmpeg-static/releases/download/b6.1.1/ffmpeg-win32-x64",
+        "sha256": "04e1307997530f9cf2fe35cba2ca7e8875ca91da02f89d6c7243df819c94ad00",
+        "version": "6.1.1"
+      },
+      "ffprobe": {
+        "url": "https://github.com/eugeneware/ffmpeg-static/releases/download/b6.1.1/ffprobe-win32-x64",
+        "sha256": "3a7e2dc003dc2cd1472827e4c7c4f056ae1ae0ae7c5bbc580c99b49827351ba4",
+        "version": "6.1.1"
+      }
+    }
+  }
+}
diff --git a/scripts/provision_ffmpeg_sidecars.py b/scripts/provision_ffmpeg_sidecars.py
new file mode 100644
index 00000000..9f5bc965
--- /dev/null
+++ b/scripts/provision_ffmpeg_sidecars.py
@@ -0,0 +1,211 @@
+#!/usr/bin/env python3
+"""Provision checksum-pinned FFmpeg sidecars for the selected Rust target."""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os
+from pathlib import Path
+import shutil
+import stat
+import subprocess
+import sys
+import tempfile
+import time
+import urllib.request
+import zipfile
+
+
+ROOT = Path(__file__).resolve().parents[1]
+LOCK_PATH = ROOT / "scripts" / "ffmpeg-sidecars.lock.json"
+BIN_DIR = ROOT / "src-tauri" / "binaries"
+
+
+def sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        for chunk in iter(lambda: stream.read(1024 * 1024), b""):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def host_target() -> str:
+    return subprocess.check_output(
+        ["rustc", "--print", "host-tuple"], text=True
+    ).strip()
+
+
+def destination(tool: str, target: str) -> Path:
+    extension = ".exe" if "windows" in target else ""
+    return BIN_DIR / f"{tool}-{target}{extension}"
+
+
+def verify(path: Path, expected_sha: str, version: str) -> None:
+    if path.is_symlink() or not path.is_file():
+        raise RuntimeError(f"sidecar is not a regular non-symlink file: {path}")
+    actual_sha = sha256(path)
+    if actual_sha != expected_sha:
+        raise RuntimeError(
+            f"sidecar checksum mismatch for {path}: {actual_sha} != {expected_sha}"
+        )
+    output = subprocess.check_output(
+        [str(path), "-version"], text=True, stderr=subprocess.STDOUT
+    )
+    if "--enable-nonfree" in output:
+        raise RuntimeError(f"unredistributable nonfree sidecar rejected: {path}")
+    first_line = output.splitlines()[0]
+    fields = first_line.split()
+    reported = fields[2] if len(fields) >= 3 else ""
+    if reported != version and not reported.startswith(f"{version}-"):
+        raise RuntimeError(f"unexpected sidecar version for {path}: {first_line}")
+    license_output = subprocess.check_output(
+        [str(path), "-L"], text=True, stderr=subprocess.STDOUT
+    )
+    if "not legally redistributable" in license_output.lower():
+        raise RuntimeError(f"unredistributable sidecar license rejected: {path}")
+
+
+def download(url: str, destination_path: Path) -> None:
+    last_error: Exception | None = None
+    for attempt in range(1, 5):
+        try:
+            request = urllib.request.Request(
+                url, headers={"User-Agent": "OpenTake-sidecar-provisioner/1"}
+            )
+            with urllib.request.urlopen(request, timeout=120) as response:
+                with destination_path.open("wb") as stream:
+                    while chunk := response.read(1024 * 1024):
+                        stream.write(chunk)
+            return
+        except OSError as error:
+            last_error = error
+            if destination_path.exists():
+                destination_path.unlink()
+            if attempt < 4:
+                time.sleep(attempt)
+    raise RuntimeError(f"download failed after 4 attempts: {last_error}")
+
+
+def materialize_download(
+    record: dict[str, object], download_path: Path, destination_path: Path
+) -> None:
+    archive = record.get("archive")
+    if archive is None:
+        os.replace(download_path, destination_path)
+        return
+    if not isinstance(archive, dict) or archive.get("format") != "zip":
+        raise RuntimeError("unsupported sidecar archive format")
+    expected_archive_sha = archive.get("sha256")
+    member = archive.get("member")
+    if not isinstance(expected_archive_sha, str) or not isinstance(member, str):
+        raise RuntimeError("sidecar archive requires string member and sha256")
+    actual_archive_sha = sha256(download_path)
+    if actual_archive_sha != expected_archive_sha:
+        raise RuntimeError(
+            "sidecar archive checksum mismatch: "
+            f"{actual_archive_sha} != {expected_archive_sha}"
+        )
+    with zipfile.ZipFile(download_path) as archive_file:
+        matches = [
+            item
+            for item in archive_file.infolist()
+            if item.filename == member and not item.is_dir()
+        ]
+        if len(matches) != 1:
+            raise RuntimeError(f"sidecar archive must contain exactly one {member!r}")
+        if matches[0].file_size > 256 * 1024 * 1024:
+            raise RuntimeError("sidecar archive member exceeds the 256 MiB limit")
+        with archive_file.open(matches[0]) as source, destination_path.open("wb") as target:
+            shutil.copyfileobj(source, target, length=1024 * 1024)
+
+
+def provision(tool: str, record: dict[str, object], target: str) -> None:
+    BIN_DIR.mkdir(parents=True, exist_ok=True)
+    final_path = destination(tool, target)
+    expected_sha = record.get("sha256")
+    version = record.get("version")
+    url = record.get("url")
+    if not all(isinstance(value, str) for value in (expected_sha, version, url)):
+        raise RuntimeError(f"invalid sidecar lock record for {tool}/{target}")
+    assert isinstance(expected_sha, str)
+    assert isinstance(version, str)
+    assert isinstance(url, str)
+    if final_path.is_file() and sha256(final_path) == expected_sha:
+        verify(final_path, expected_sha, version)
+        print(f"verified {final_path.relative_to(ROOT)}")
+        return
+
+    with tempfile.NamedTemporaryFile(
+        prefix=f".{tool}-{target}-", dir=BIN_DIR, delete=False
+    ) as stream:
+        temporary_path = Path(stream.name)
+    archive_path: Path | None = None
+
+    try:
+        if record.get("archive") is None:
+            download(url, temporary_path)
+        else:
+            with tempfile.NamedTemporaryFile(
+                prefix=f".{tool}-{target}-archive-", dir=BIN_DIR, delete=False
+            ) as stream:
+                archive_path = Path(stream.name)
+            download(url, archive_path)
+            materialize_download(record, archive_path, temporary_path)
+        actual_sha = sha256(temporary_path)
+        if actual_sha != expected_sha:
+            raise RuntimeError(
+                f"download checksum mismatch for {tool}: {actual_sha} != {expected_sha}"
+            )
+        if "windows" not in target:
+            temporary_path.chmod(
+                temporary_path.stat().st_mode
+                | stat.S_IXUSR
+                | stat.S_IXGRP
+                | stat.S_IXOTH
+            )
+        verify(temporary_path, expected_sha, version)
+        os.replace(temporary_path, final_path)
+        verify(final_path, expected_sha, version)
+        print(f"provisioned {final_path.relative_to(ROOT)}")
+    finally:
+        if temporary_path.exists():
+            temporary_path.unlink()
+        if archive_path is not None and archive_path.exists():
+            archive_path.unlink()
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--target", default=host_target())
+    parser.add_argument("--verify-only", action="store_true")
+    args = parser.parse_args()
+
+    lock = json.loads(LOCK_PATH.read_text(encoding="utf-8"))
+    try:
+        target = lock["targets"][args.target]
+    except KeyError as error:
+        raise SystemExit(f"unsupported packaged sidecar target: {args.target}") from error
+
+    BIN_DIR.mkdir(parents=True, exist_ok=True)
+    for partial in BIN_DIR.glob(f".*-{args.target}-*"):
+        if partial.is_file() and not partial.is_symlink():
+            partial.unlink()
+
+    for tool in ("ffmpeg", "ffprobe"):
+        path = destination(tool, args.target)
+        if args.verify_only:
+            verify(path, target[tool]["sha256"], target[tool]["version"])
+            print(f"verified {path.relative_to(ROOT)}")
+        else:
+            provision(tool, target[tool], args.target)
+    return 0
+
+
+if __name__ == "__main__":
+    try:
+        sys.exit(main())
+    except (OSError, RuntimeError, subprocess.SubprocessError) as error:
+        print(f"error: {error}", file=sys.stderr)
+        sys.exit(1)
diff --git a/scripts/test_check_windows_product_ci.py b/scripts/test_check_windows_product_ci.py
index e7746219..b40603aa 100644
--- a/scripts/test_check_windows_product_ci.py
+++ b/scripts/test_check_windows_product_ci.py
@@ -1,3 +1,4 @@
+import json
 import unittest
 from pathlib import Path
 
@@ -17,6 +18,34 @@ def assert_rejected(self, workflow: str, expected: str) -> None:
     def test_repository_workflow_satisfies_contract(self) -> None:
         self.assertEqual([], contract.validate_workflow(WORKFLOW))
 
+    def test_accepts_beta_app_version_with_numeric_msi_mapping(self) -> None:
+        config = json.dumps(
+            {
+                "version": "1.0.0-beta.1",
+                "bundle": {"windows": {"wix": {"version": "1.0.0.1"}}},
+            }
+        )
+        self.assertEqual([], contract.validate_tauri_config(config))
+
+    def test_rejects_missing_numeric_msi_mapping(self) -> None:
+        config = json.dumps({"version": "1.0.0-beta.1", "bundle": {}})
+        self.assertIn(
+            "MSI-compatible numeric Beta version",
+            contract.validate_tauri_config(config),
+        )
+
+    def test_rejects_msi_mapping_for_a_different_release(self) -> None:
+        config = json.dumps(
+            {
+                "version": "1.1.0-beta.1",
+                "bundle": {"windows": {"wix": {"version": "1.0.0.1"}}},
+            }
+        )
+        self.assertIn(
+            "MSI version tracks public app version",
+            contract.validate_tauri_config(config),
+        )
+
     def test_comment_cannot_replace_workspace_test_command(self) -> None:
         mutated = WORKFLOW.replace(
             "run: cargo test --workspace -- --test-threads=1",
@@ -25,6 +54,22 @@ def test_comment_cannot_replace_workspace_test_command(self) -> None:
         )
         self.assert_rejected(mutated, "Rust workspace tests command")
 
+    def test_chromium_gate_must_include_the_live_security_integration(self) -> None:
+        mutated = WORKFLOW.replace(
+            "            virtual_time_network_csp_timeout_cleanup_and_frame_identity \\\n",
+            "",
+            1,
+        )
+        self.assert_rejected(mutated, "complete Windows Chromium motion regression")
+
+    def test_cancellation_gate_must_use_the_pinned_packaged_ffmpeg(self) -> None:
+        mutated = WORKFLOW.replace(
+            "          OPENTAKE_FFMPEG: ${{ github.workspace }}\\src-tauri\\binaries\\ffmpeg-x86_64-pc-windows-msvc.exe\n",
+            "",
+            1,
+        )
+        self.assert_rejected(mutated, "pinned FFmpeg cancellation lifecycle")
+
     def test_product_cache_cannot_restore_target_outputs(self) -> None:
         mutated = WORKFLOW.replace(
             "            ~/.cargo/git\n          key: windows-product-",
@@ -33,6 +78,14 @@ def test_product_cache_cannot_restore_target_outputs(self) -> None:
         )
         self.assert_rejected(mutated, "product cache excludes target")
 
+    def test_installed_product_must_launch(self) -> None:
+        without_launch = WORKFLOW.replace(
+            "          $app = Start-Process -FilePath $application -PassThru\n",
+            "          $app = $null\n",
+            1,
+        )
+        self.assert_rejected(without_launch, "installed product launch smoke test")
+
     def test_receipt_must_hash_installers_and_bind_source_sha(self) -> None:
         without_hash = WORKFLOW.replace(
             "sha256 = (Get-FileHash", "digest = (Get-FileHash", 1
diff --git a/scripts/tests/packaged-sidecars-test.rb b/scripts/tests/packaged-sidecars-test.rb
new file mode 100644
index 00000000..80e32c96
--- /dev/null
+++ b/scripts/tests/packaged-sidecars-test.rb
@@ -0,0 +1,155 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "digest"
+require "json"
+require "open3"
+require "optparse"
+require "pathname"
+require "tmpdir"
+
+ROOT = Pathname.new(__dir__).join("../..").expand_path
+LOCK_PATH = ROOT.join("scripts/ffmpeg-sidecars.lock.json")
+BIN_DIR = ROOT.join("src-tauri/binaries")
+
+def assert(condition, message)
+  raise message unless condition
+end
+
+def capture!(*command, env: {})
+  stdout, stderr, status = Open3.capture3(env, *command)
+  raise "command failed (#{command.join(' ')}): #{stderr}" unless status.success?
+
+  stdout
+end
+
+def host_target
+  capture!("rustc", "--print", "host-tuple").strip
+end
+
+def executable_name(tool, target)
+  suffix = target.include?("windows") ? ".exe" : ""
+  "#{tool}-#{target}#{suffix}"
+end
+
+def verify_reported_version(path, tool, record)
+  output = capture!(path.to_s, "-version", env: { "PATH" => "" })
+  reported = output.lines.first.to_s.split[2].to_s
+  expected = record.fetch("version")
+  assert(reported == expected || reported.start_with?("#{expected}-"),
+         "unexpected #{tool} version: #{output.lines.first}")
+  assert(!output.include?("--enable-nonfree"),
+         "#{tool} enables nonfree components and cannot be redistributed")
+
+  license = capture!(path.to_s, "-L", env: { "PATH" => "" })
+  assert(!license.downcase.include?("not legally redistributable"),
+         "#{tool} reports that it is not legally redistributable")
+end
+
+def verify_locked_binary(tool, target, lock)
+  record = lock.fetch("targets").fetch(target).fetch(tool)
+  path = BIN_DIR.join(executable_name(tool, target))
+  assert(path.file? && !path.symlink?, "missing regular provisioned sidecar: #{path}")
+  assert(Digest::SHA256.file(path).hexdigest == record.fetch("sha256"),
+         "sidecar checksum mismatch: #{path}")
+  verify_reported_version(path, tool, record)
+  path
+end
+
+def smoke_media_pipeline(ffmpeg, ffprobe)
+  Dir.mktmpdir("opentake-packaged-sidecars") do |dir|
+    source = File.join(dir, "source.mp4")
+    decoded = File.join(dir, "decoded.rgba")
+    encoded = File.join(dir, "encoded.mp4")
+    clean_env = { "PATH" => "" }
+
+    capture!(ffmpeg.to_s, "-v", "error", "-f", "lavfi", "-i",
+             "color=c=0x336699:s=64x36:r=6", "-t", "1", "-c:v", "mpeg4",
+             "-y", source, env: clean_env)
+    probe = JSON.parse(capture!(ffprobe.to_s, "-v", "error", "-of", "json",
+                                "-show_streams", "-show_format", source,
+                                env: clean_env))
+    video = probe.fetch("streams").find { |stream| stream["codec_type"] == "video" }
+    assert(video && video["width"] == 64 && video["height"] == 36,
+           "ffprobe did not report the generated 64x36 video")
+
+    capture!(ffmpeg.to_s, "-v", "error", "-i", source, "-frames:v", "1",
+             "-f", "rawvideo", "-pix_fmt", "rgba", "-y", decoded,
+             env: clean_env)
+    assert(File.size(decoded) == 64 * 36 * 4, "decoded RGBA frame size is wrong")
+
+    capture!(ffmpeg.to_s, "-v", "error", "-i", source, "-vf", "scale=32:18",
+             "-c:v", "mpeg4", "-y", encoded, env: clean_env)
+    encoded_probe = JSON.parse(capture!(ffprobe.to_s, "-v", "error", "-of", "json",
+                                        "-show_streams", encoded, env: clean_env))
+    encoded_video = encoded_probe.fetch("streams").find { |stream| stream["codec_type"] == "video" }
+    assert(encoded_video && encoded_video["width"] == 32 && encoded_video["height"] == 18,
+           "encoded smoke output is not 32x18")
+  end
+end
+
+def packaged_paths(package, target)
+  package = Pathname.new(package).expand_path
+  if target.include?("apple-darwin")
+    macos = package.join("Contents/MacOS")
+    [macos.join("ffmpeg"), macos.join("ffprobe")]
+  elsif target.include?("windows")
+    [package.join("ffmpeg.exe"), package.join("ffprobe.exe")]
+  else
+    raise "packaged smoke is only defined for macOS and Windows"
+  end
+end
+
+def packaged_macos_windows_sidecars_resolve_and_execute(package: nil)
+  assert(LOCK_PATH.file?, "missing sidecar supply-chain lock: #{LOCK_PATH}")
+  lock = JSON.parse(LOCK_PATH.read)
+  target = host_target
+  assert(lock.fetch("targets").key?(target), "unsupported packaged sidecar target: #{target}")
+
+  %w[tauri.macos.conf.json tauri.windows.conf.json].each do |name|
+    config = JSON.parse(ROOT.join("src-tauri", name).read)
+    assert(config.dig("bundle", "externalBin") == %w[binaries/ffmpeg binaries/ffprobe],
+           "#{name} must package the locked ffmpeg and ffprobe sidecars")
+  end
+
+  source_ffmpeg = verify_locked_binary("ffmpeg", target, lock)
+  source_ffprobe = verify_locked_binary("ffprobe", target, lock)
+  smoke_media_pipeline(source_ffmpeg, source_ffprobe)
+
+  return unless package
+
+  packaged_ffmpeg, packaged_ffprobe = packaged_paths(package, target)
+  target_lock = lock.fetch("targets").fetch(target)
+  assert(packaged_ffmpeg.file? && !packaged_ffmpeg.symlink? &&
+         packaged_ffprobe.file? && !packaged_ffprobe.symlink?,
+         "package does not contain ffmpeg and ffprobe beside the application executable")
+  if target.include?("apple-darwin")
+    # macOS code signing writes a Mach-O signature into each nested executable,
+    # so a correctly signed final package will not retain the source SHA-256.
+    # The source files were verified above; the final files must instead retain
+    # their locked version and license metadata, execute the smoke, and satisfy
+    # code-sign validation.
+    capture!("codesign", "--verify", "--strict", packaged_ffmpeg.to_s)
+    capture!("codesign", "--verify", "--strict", packaged_ffprobe.to_s)
+  else
+    assert(Digest::SHA256.file(packaged_ffmpeg).hexdigest == Digest::SHA256.file(source_ffmpeg).hexdigest,
+           "packaged ffmpeg differs from the verified source sidecar")
+    assert(Digest::SHA256.file(packaged_ffprobe).hexdigest == Digest::SHA256.file(source_ffprobe).hexdigest,
+           "packaged ffprobe differs from the verified source sidecar")
+  end
+  verify_reported_version(packaged_ffmpeg, "ffmpeg", target_lock.fetch("ffmpeg"))
+  verify_reported_version(packaged_ffprobe, "ffprobe", target_lock.fetch("ffprobe"))
+  smoke_media_pipeline(packaged_ffmpeg, packaged_ffprobe)
+end
+
+options = { name: nil, package: nil }
+OptionParser.new do |parser|
+  parser.on("--name NAME") { |name| options[:name] = name }
+  parser.on("--package PATH") { |path| options[:package] = path }
+end.parse!
+
+expected_name = "packaged_macos_windows_sidecars_resolve_and_execute"
+assert(options[:name].nil? || options[:name] == expected_name,
+       "unknown test name: #{options[:name]}")
+packaged_macos_windows_sidecars_resolve_and_execute(package: options[:package])
+puts "PASS: #{expected_name}"
diff --git a/scripts/tests/test_provision_ffmpeg_sidecars.py b/scripts/tests/test_provision_ffmpeg_sidecars.py
new file mode 100644
index 00000000..b2aefe8e
--- /dev/null
+++ b/scripts/tests/test_provision_ffmpeg_sidecars.py
@@ -0,0 +1,117 @@
+from __future__ import annotations
+
+import hashlib
+import importlib.util
+import json
+from pathlib import Path
+import tempfile
+import unittest
+from unittest import mock
+import zipfile
+
+
+ROOT = Path(__file__).resolve().parents[2]
+MODULE_PATH = ROOT / "scripts" / "provision_ffmpeg_sidecars.py"
+SPEC = importlib.util.spec_from_file_location("provision_ffmpeg_sidecars", MODULE_PATH)
+assert SPEC is not None and SPEC.loader is not None
+provisioner = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(provisioner)
+
+
+def digest(data: bytes) -> str:
+    return hashlib.sha256(data).hexdigest()
+
+
+class ProvisionFfmpegSidecarsTests(unittest.TestCase):
+    def test_materializes_only_the_checksum_pinned_zip_member(self) -> None:
+        binary = b"redistributable ffmpeg"
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            archive_path = root / "sidecar.zip"
+            destination = root / "ffmpeg"
+            with zipfile.ZipFile(archive_path, "w") as archive:
+                archive.writestr("ffmpeg", binary)
+                archive.writestr("ignored", b"not selected")
+            record = {
+                "archive": {
+                    "format": "zip",
+                    "member": "ffmpeg",
+                    "sha256": provisioner.sha256(archive_path),
+                }
+            }
+
+            provisioner.materialize_download(record, archive_path, destination)
+
+            self.assertEqual(destination.read_bytes(), binary)
+
+    def test_rejects_archive_checksum_mismatch(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            archive_path = root / "sidecar.zip"
+            destination = root / "ffmpeg"
+            with zipfile.ZipFile(archive_path, "w") as archive:
+                archive.writestr("ffmpeg", b"unexpected")
+            record = {
+                "archive": {
+                    "format": "zip",
+                    "member": "ffmpeg",
+                    "sha256": "0" * 64,
+                }
+            }
+
+            with self.assertRaisesRegex(RuntimeError, "archive checksum mismatch"):
+                provisioner.materialize_download(record, archive_path, destination)
+
+            self.assertFalse(destination.exists())
+
+    def test_verify_rejects_nonfree_or_unredistributable_metadata(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            binary = Path(directory) / "ffmpeg"
+            binary.write_bytes(b"fixture")
+            expected_sha = digest(b"fixture")
+
+            with mock.patch.object(
+                provisioner.subprocess,
+                "check_output",
+                return_value="ffmpeg version 7.0\nconfiguration: --enable-nonfree\n",
+            ):
+                with self.assertRaisesRegex(RuntimeError, "nonfree sidecar"):
+                    provisioner.verify(binary, expected_sha, "7.0")
+
+            with mock.patch.object(
+                provisioner.subprocess,
+                "check_output",
+                side_effect=[
+                    "ffmpeg version 7.0\nconfiguration: --enable-gpl\n",
+                    "This version is not legally redistributable.\n",
+                ],
+            ):
+                with self.assertRaisesRegex(RuntimeError, "sidecar license"):
+                    provisioner.verify(binary, expected_sha, "7.0")
+
+            with mock.patch.object(
+                provisioner.subprocess,
+                "check_output",
+                side_effect=[
+                    "ffmpeg version 7.0\nconfiguration: --enable-gpl\n",
+                    "GNU General Public License version 3 or later\n",
+                ],
+            ) as metadata:
+                provisioner.verify(binary, expected_sha, "7.0")
+                self.assertEqual(metadata.call_count, 2)
+
+    def test_apple_silicon_lock_pins_archive_and_binary_hashes(self) -> None:
+        lock = json.loads((ROOT / "scripts" / "ffmpeg-sidecars.lock.json").read_text())
+        self.assertEqual(lock["schema"], "opentake-ffmpeg-sidecars-v2")
+        target = lock["targets"]["aarch64-apple-darwin"]
+        for tool in ("ffmpeg", "ffprobe"):
+            record = target[tool]
+            self.assertEqual(record["version"], "7.0")
+            self.assertRegex(record["sha256"], r"^[0-9a-f]{64}$")
+            self.assertEqual(record["archive"]["format"], "zip")
+            self.assertEqual(record["archive"]["member"], tool)
+            self.assertRegex(record["archive"]["sha256"], r"^[0-9a-f]{64}$")
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index f3472553..aee7f279 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -24,6 +24,11 @@ tauri-build = { version = "2", features = [] }
 [dependencies]
 tauri = { version = "2", features = ["protocol-asset"] }
 tauri-plugin-dialog = "2"
+# Dialog selections extend the runtime file/asset scopes. Persist only those
+# user-approved paths so Recents can render media after restart without the
+# previous global `**` asset exposure. The fs plugin must initialize first.
+tauri-plugin-fs = "2"
+tauri-plugin-persisted-scope = { version = "2", features = ["protocol-asset"] }
 serde = { workspace = true }
 serde_json = { workspace = true }
 opentake-core = { workspace = true }
@@ -32,19 +37,19 @@ opentake-ops = { workspace = true }
 opentake-domain = { workspace = true }
 # Transcription + visual semantic search are ON for the shipped app:
 # `whisper-backend` compiles the whisper.cpp CPU backend (via cmake —
-# preinstalled on GitHub runners, no CUDA); `ort-backend` links ONNX Runtime for
-# the SigLIP2 dual-encoder — its `download-binaries` feature fetches a
-# *statically* linked prebuilt onnxruntime at build time and bakes it into the
-# binary (no runtime .so/.dylib to ship; same build-time-network shape as
-# whisper.cpp / model-download); `model-download` pulls the model files over
-# HTTPS with checksum verification. All three stay optional at the
-# opentake-media level (its own default tests run offline, without them);
+# preinstalled on GitHub runners, no CUDA); `ort-backend` runs the SigLIP2
+# dual-encoder through a checksum-pinned native ONNX Runtime on macOS/Linux and
+# ort's official pure-Rust tract backend on Windows. The Windows package has no
+# native ONNX Runtime or DirectX provider dependency. `model-download` pulls the
+# model files over HTTPS with checksum verification. All three stay optional at
+# the opentake-media level (its own default tests run offline, without them);
 # ort-inference tests are feature-gated + runtime-skipped like the GPU/ffmpeg
 # integration tests.
 opentake-media = { workspace = true, features = ["whisper-backend", "ort-backend", "model-download"] }
 opentake-render = { workspace = true }
 opentake-gen = { workspace = true }
 opentake-agent = { workspace = true }
+opentake-motion = { workspace = true, features = ["chromium"] }
 # Preview composite frames are returned to the WebView as a base64 PNG data URL;
 # the agent's `inspect_timeline` bridge encodes composited frames as JPEG.
 image = { version = "0.25", default-features = false, features = ["png", "jpeg"] }
@@ -54,16 +59,20 @@ cap-std = "4.0.2"
 cap-fs-ext = "4.0.2"
 sha2 = "0.10"
 uuid = { workspace = true }
+tempfile = "3"
 # Optional account scaffold: verify a token only against a user-configured
 # backend. Rustls keeps the desktop build independent of a system OpenSSL.
-reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "multipart", "rustls-tls"] }
 futures-util = "0.3"
+crossbeam-channel = "0.5"
+velato = { workspace = true }
+sentry = { workspace = true }
 
 # Tokio is also required by the always-built MCP server (URL import cancellation,
 # timers and the loopback runtime), so it cannot be optional in the minimal
 # no-playback shell. The remaining transport dependencies stay feature-gated.
 axum = { version = "0.8", features = ["ws"], optional = true }
-tokio = { version = "1", features = ["rt", "rt-multi-thread", "net", "sync", "time"] }
+tokio = { version = "1", features = ["rt", "rt-multi-thread", "net", "sync", "time", "process", "io-util"] }
 bytes = { version = "1", optional = true }
 futures = { version = "0.3", optional = true }
 # Real-time audio output backing the playback master clock (#63). New crate:
@@ -76,6 +85,7 @@ cpal = { version = "0.15", optional = true }
 # Tauri, so this only enables the NSHapticFeedback module (incremental build).
 [target.'cfg(target_os = "macos")'.dependencies]
 objc2-app-kit = { version = "0.3", default-features = false, features = ["NSHapticFeedback"] }
+objc2-foundation = { version = "0.3", default-features = false, features = ["NSError", "NSFileManager", "NSString", "NSURL"] }
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"
@@ -84,8 +94,8 @@ libc = "0.2"
 windows-sys = { version = "0.61", features = ["Win32_Storage_FileSystem"] }
 
 [dev-dependencies]
-tempfile = "3"
 opentake-media = { workspace = true, features = ["test-faults"] }
+tauri = { version = "2", features = ["protocol-asset", "test"] }
 
 [features]
 # `default` now includes `playback-engine`: the continuous Rust streaming engine
diff --git a/src-tauri/build.rs b/src-tauri/build.rs
index d860e1e6..b71159c6 100644
--- a/src-tauri/build.rs
+++ b/src-tauri/build.rs
@@ -1,3 +1,26 @@
 fn main() {
-    tauri_build::build()
+    let is_windows_msvc =
+        std::env::var("TARGET").is_ok_and(|target| target.contains("windows-msvc"));
+    let attributes = if is_windows_msvc {
+        // Keep tauri-build's icon and version resources, but let the linker
+        // below provide the single manifest shared by binary and test targets.
+        tauri_build::Attributes::new()
+            .windows_attributes(tauri_build::WindowsAttributes::new_without_app_manifest())
+    } else {
+        tauri_build::Attributes::new()
+    };
+    tauri_build::try_build(attributes).expect("failed to run tauri build script");
+
+    // The lib-test harness contains rfd's TaskDialogIndirect import too. Every
+    // linked Windows image must activate Common Controls v6 or it exits before
+    // main with STATUS_ENTRYPOINT_NOT_FOUND. A single linker-generated manifest
+    // avoids duplicating tauri-build's RT_MANIFEST resource in the shipped EXE.
+    if is_windows_msvc {
+        println!("cargo:rustc-link-arg=/MANIFEST:EMBED,ID=1");
+        println!(
+            "cargo:rustc-link-arg=/MANIFESTDEPENDENCY:type='win32' \
+             name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
+             processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"
+        );
+    }
 }
diff --git a/src-tauri/capabilities/default.json b/src-tauri/capabilities/default.json
index 7cf758b8..59f59e6c 100644
--- a/src-tauri/capabilities/default.json
+++ b/src-tauri/capabilities/default.json
@@ -10,6 +10,7 @@
     "core:event:default",
     "core:event:allow-listen",
     "core:event:allow-emit",
+    "core:window:allow-set-fullscreen",
     "dialog:default",
     "dialog:allow-open",
     "dialog:allow-save"
diff --git a/src-tauri/resources/ffmpeg/SOURCE.md b/src-tauri/resources/ffmpeg/SOURCE.md
new file mode 100644
index 00000000..66a7bb6d
--- /dev/null
+++ b/src-tauri/resources/ffmpeg/SOURCE.md
@@ -0,0 +1,23 @@
+# Bundled FFmpeg
+
+OpenTake packages checksum-pinned FFmpeg and FFprobe binaries. The exact
+per-platform download URL, archive member (when applicable), archive SHA-256,
+extracted-binary SHA-256, and reported version are recorded in
+`scripts/ffmpeg-sidecars.lock.json`.
+
+The Apple Silicon pair is the FFmpeg 7.0 arm64 build published by
+[OSXExperts](https://www.osxexperts.net/). Its reported configure line enables
+GPL components such as x264/x265 but does **not** enable FFmpeg's `nonfree`
+option. Both programs report GNU GPL terms through `-L`. The provisioning script
+fails closed when a binary reports `--enable-nonfree` or says it is not legally
+redistributable. Other target records remain pinned to the
+[`eugeneware/ffmpeg-static` b6.1.1 release](https://github.com/eugeneware/ffmpeg-static/releases/tag/b6.1.1)
+and are subject to the same fail-closed runtime license check on their native
+build hosts.
+
+FFmpeg is distributed under GPL-compatible terms; OpenTake itself is
+GPL-3.0-or-later and packages its complete GPL license and this source notice.
+
+FFmpeg source tags used by the locked target assets:
+https://github.com/FFmpeg/FFmpeg/tree/n7.0 and
+https://github.com/FFmpeg/FFmpeg/tree/n6.1.1
diff --git a/src-tauri/src/account.rs b/src-tauri/src/account.rs
index bea429ea..a689b93d 100644
--- a/src-tauri/src/account.rs
+++ b/src-tauri/src/account.rs
@@ -109,6 +109,10 @@ pub(crate) fn generation_credential() -> Result<Option<(String, String)>, String
         .map(|credential| (credential.backend_url, credential.token)))
 }
 
+pub(crate) fn configured_backend_url() -> Result<Option<String>, String> {
+    load_backend_url(&keyring_store())
+}
+
 fn advance_generation(runtime: &mut AccountRuntime) -> u64 {
     runtime.generation = runtime.generation.wrapping_add(1);
     runtime.generation
diff --git a/src-tauri/src/advanced.rs b/src-tauri/src/advanced.rs
new file mode 100644
index 00000000..727d7565
--- /dev/null
+++ b/src-tauri/src/advanced.rs
@@ -0,0 +1,5713 @@
+//! Production desktop implementations for capability-gated advanced workflows.
+
+use std::collections::VecDeque;
+use std::io::{Read, Seek, SeekFrom, Write};
+use std::path::{Path, PathBuf};
+use std::sync::{Arc, Mutex};
+
+use opentake_agent::mcp::advanced::{
+    AdvancedWorkflowBridge, AdvancedWorkflowCommit, AdvancedWorkflowError,
+    AdvancedWorkflowErrorKind, AdvancedWorkflowRequest,
+};
+use opentake_agent::tools::args::{
+    CloneVoiceArgs, GenerateAvatarArgs, GenerateMatteArgs, MatchColorArgs, RemoveObjectArgs,
+    ScriptSegmentArg, ScriptToVideoArgs, SeparateStemsArgs, TrackMotionArgs, TranslateCaptionsArgs,
+};
+use opentake_agent::tools::names::ToolName;
+use opentake_core::{
+    AppCore, DerivedStemProvenance, MotionPlacement, PreparedMediaImportOp, ProbedMedia,
+    ProjectRevision,
+};
+use opentake_domain::{
+    luma709, AnimPair, CaptionTranslationInput, ColorGrade, ColorMatchInput, GenerationInput,
+    GenerationJobStatus, Interpolation, Keyframe, KeyframeTrack, LiftGammaGain, Mask, Rgb,
+    ScriptAssemblyPlan, ScriptAssemblySegment, TransitionKind, VoiceModelRecord,
+};
+use opentake_gen::{KeyStore, KeyringStore, ProviderKey};
+use opentake_media::analysis::{
+    track_region_motion, verify_rvm_model, NormalizedMotionRegion, RegionMotionTrack,
+    RvmMattingSession, StemExecution, StemSeparationRequest,
+};
+use opentake_media::decode::spawn_video_stream;
+use opentake_media::{
+    decode_frames_at_cancellable, extract_pcm_cancellable, file_sha256, probe, ExportPreset,
+    ExportResolution, FrameRequest, MediaCancelToken, MediaError, PcmFormat, PcmSpec, RgbaFrame,
+    StreamVideoFrame, VideoCodec, VideoEncoder, VideoStream, VideoStreamRequest,
+};
+use opentake_ops::{
+    CaptionTranslationChange, ClipEntry, EditCommand, KeyframePayload, KeyframeProperty,
+};
+use same_file::Handle;
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use sha2::{Digest, Sha256};
+use tauri::{AppHandle, Emitter, State};
+
+use crate::media::MediaState;
+
+pub struct TauriAdvancedWorkflowBridge {
+    core: AppCore,
+    cache_root: PathBuf,
+    models_dir: PathBuf,
+    caption_translator: Arc<dyn CaptionTranslationProvider>,
+    avatar_provider: Arc<dyn AvatarProvider>,
+    voice_provider: Arc<dyn VoiceCloneProvider>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+struct CaptionTranslationDraft {
+    id: String,
+    text: String,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+struct CaptionTranslationFailure {
+    id: String,
+    message: String,
+}
+
+#[derive(Clone, Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+struct CaptionTranslationProviderResult {
+    translations: Vec<CaptionTranslationDraft>,
+    #[serde(default)]
+    errors: Vec<CaptionTranslationFailure>,
+}
+
+trait CaptionTranslationProvider: Send + Sync {
+    fn translate(
+        &self,
+        provider: &str,
+        model: &str,
+        source_locale: &str,
+        target_locale: &str,
+        captions: &[CaptionTranslationDraft],
+        cancel: &MediaCancelToken,
+    ) -> Result<CaptionTranslationProviderResult, AdvancedWorkflowError>;
+}
+
+struct NetworkCaptionTranslationProvider;
+
+#[derive(Clone, Debug)]
+struct AvatarProviderRequest {
+    portrait_path: PathBuf,
+    audio_path: PathBuf,
+    model: String,
+    destination: PathBuf,
+}
+
+#[derive(Clone, Debug)]
+struct AvatarProviderOutput {
+    request_id: String,
+    media_type: String,
+}
+
+trait AvatarProvider: Send + Sync {
+    fn generate(
+        &self,
+        request: &AvatarProviderRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<AvatarProviderOutput, AdvancedWorkflowError>;
+}
+
+#[derive(Clone, Debug)]
+struct VoiceEnrollmentRequest {
+    reference_path: PathBuf,
+    voice_name: String,
+}
+
+#[derive(Clone, Debug)]
+struct VoiceGenerationRequest {
+    provider_voice_id: String,
+    model: String,
+    prompt: String,
+    destination: PathBuf,
+}
+
+#[derive(Clone, Debug)]
+struct VoiceProviderOutput {
+    request_id: String,
+    media_type: String,
+}
+
+trait VoiceCloneProvider: Send + Sync {
+    fn enroll(
+        &self,
+        request: &VoiceEnrollmentRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<String, AdvancedWorkflowError>;
+
+    fn generate(
+        &self,
+        request: &VoiceGenerationRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<VoiceProviderOutput, AdvancedWorkflowError>;
+
+    fn revoke(
+        &self,
+        provider_voice_id: &str,
+        cancel: &MediaCancelToken,
+    ) -> Result<(), AdvancedWorkflowError>;
+}
+
+struct NetworkFalAvatarProvider {
+    cache_root: PathBuf,
+}
+
+struct NetworkElevenLabsVoiceProvider;
+
+fn valid_provider_resource_id(value: &str) -> bool {
+    !value.is_empty()
+        && value.len() <= 256
+        && value
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || matches!(byte, b'-' | b'_'))
+}
+
+fn provider_key(key: ProviderKey, label: &str) -> Result<String, AdvancedWorkflowError> {
+    KeyringStore::new()
+        .load(key.account())
+        .map_err(|error| advanced_execution(format!("could not read {label} key: {error}")))?
+        .ok_or_else(|| {
+            AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::ConsentRequired,
+                format!("no {label} API key is configured; open Settings → AI"),
+            )
+        })
+}
+
+fn reference_data_url(
+    path: &Path,
+    fallback: &str,
+    max_bytes: u64,
+) -> Result<String, AdvancedWorkflowError> {
+    use base64::Engine as _;
+    let metadata = std::fs::symlink_metadata(path)
+        .map_err(|_| advanced_resource("reference media is unavailable"))?;
+    if !metadata.file_type().is_file()
+        || metadata.file_type().is_symlink()
+        || metadata.len() == 0
+        || metadata.len() > max_bytes
+    {
+        return Err(advanced_invalid(
+            "reference media must be a bounded regular non-symlink file",
+        ));
+    }
+    let bytes =
+        std::fs::read(path).map_err(|_| advanced_resource("reference media could not be read"))?;
+    let mime = opentake_gen::content_type_for(path, fallback);
+    Ok(format!(
+        "data:{mime};base64,{}",
+        base64::engine::general_purpose::STANDARD.encode(bytes)
+    ))
+}
+
+fn bounded_json_response(
+    response: reqwest::blocking::Response,
+    provider: &str,
+) -> Result<serde_json::Value, AdvancedWorkflowError> {
+    const LIMIT: u64 = 4 * 1024 * 1024;
+    if !response.status().is_success() {
+        return Err(advanced_execution(format!(
+            "{provider} provider returned HTTP {}",
+            response.status()
+        )));
+    }
+    if response
+        .content_length()
+        .is_some_and(|length| length > LIMIT)
+    {
+        return Err(advanced_execution(format!(
+            "{provider} provider response is too large"
+        )));
+    }
+    let mut body = Vec::new();
+    response
+        .take(LIMIT + 1)
+        .read_to_end(&mut body)
+        .map_err(|_| advanced_execution(format!("could not read {provider} response")))?;
+    if body.len() as u64 > LIMIT {
+        return Err(advanced_execution(format!(
+            "{provider} provider response is too large"
+        )));
+    }
+    serde_json::from_slice(&body)
+        .map_err(|_| advanced_execution(format!("{provider} returned invalid JSON")))
+}
+
+impl AvatarProvider for NetworkFalAvatarProvider {
+    fn generate(
+        &self,
+        request: &AvatarProviderRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<AvatarProviderOutput, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("avatar generation cancelled"));
+        }
+        let key = provider_key(ProviderKey::Fal, "fal")?;
+        let image_url = reference_data_url(&request.portrait_path, "image", 20 * 1024 * 1024)?;
+        let audio_url = reference_data_url(&request.audio_path, "audio", 50 * 1024 * 1024)?;
+        let client = reqwest::blocking::Client::builder()
+            .no_proxy()
+            .redirect(reqwest::redirect::Policy::none())
+            .connect_timeout(std::time::Duration::from_secs(15))
+            .timeout(std::time::Duration::from_secs(120))
+            .build()
+            .map_err(|_| advanced_execution("avatar provider client initialization failed"))?;
+        let queue_base = format!("https://queue.fal.run/{}", request.model);
+        let submit = client
+            .post(&queue_base)
+            .header("Authorization", format!("Key {key}"))
+            .json(&json!({"image_url": image_url, "audio_url": audio_url}))
+            .send()
+            .map_err(|_| advanced_execution("avatar provider submission failed"))?;
+        let submit = bounded_json_response(submit, "avatar")?;
+        let request_id = submit
+            .get("request_id")
+            .and_then(serde_json::Value::as_str)
+            .filter(|value| valid_provider_resource_id(value))
+            .ok_or_else(|| advanced_execution("avatar provider returned no request id"))?
+            .to_string();
+        let cancel_remote = || {
+            let _ = client
+                .put(format!("{queue_base}/requests/{request_id}/cancel"))
+                .header("Authorization", format!("Key {key}"))
+                .timeout(std::time::Duration::from_secs(10))
+                .send();
+        };
+        let started = std::time::Instant::now();
+        loop {
+            if cancel.checkpoint() {
+                cancel_remote();
+                return Err(cancelled_workflow("avatar generation cancelled"));
+            }
+            if started.elapsed() > std::time::Duration::from_secs(30 * 60) {
+                cancel_remote();
+                return Err(advanced_execution("avatar provider timed out"));
+            }
+            let response = client
+                .get(format!("{queue_base}/requests/{request_id}/status"))
+                .header("Authorization", format!("Key {key}"))
+                .send()
+                .map_err(|_| advanced_execution("avatar provider status request failed"))?;
+            let status = bounded_json_response(response, "avatar")?;
+            match status.get("status").and_then(serde_json::Value::as_str) {
+                Some("COMPLETED") => break,
+                Some("FAILED") => {
+                    return Err(advanced_execution("avatar provider generation failed"))
+                }
+                Some("IN_QUEUE" | "IN_PROGRESS") => {
+                    std::thread::sleep(std::time::Duration::from_millis(350));
+                }
+                _ => {
+                    return Err(advanced_execution(
+                        "avatar provider returned unknown status",
+                    ))
+                }
+            }
+        }
+        if cancel.checkpoint() {
+            cancel_remote();
+            return Err(cancelled_workflow("avatar generation cancelled"));
+        }
+        let result = client
+            .get(format!("{queue_base}/requests/{request_id}"))
+            .header("Authorization", format!("Key {key}"))
+            .send()
+            .map_err(|_| advanced_execution("avatar provider result request failed"))?;
+        let result = bounded_json_response(result, "avatar")?;
+        let result_url = result
+            .pointer("/video/url")
+            .and_then(serde_json::Value::as_str)
+            .ok_or_else(|| advanced_execution("avatar provider returned no video"))?;
+        let (media_type, _) = crate::generation::secure_download_generation_result(
+            self.cache_root.join("avatar-downloads"),
+            cancel.clone(),
+            result_url,
+            &request.destination,
+        )
+        .map_err(advanced_execution)?;
+        Ok(AvatarProviderOutput {
+            request_id,
+            media_type,
+        })
+    }
+}
+
+impl VoiceCloneProvider for NetworkElevenLabsVoiceProvider {
+    fn enroll(
+        &self,
+        request: &VoiceEnrollmentRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<String, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("voice enrollment cancelled"));
+        }
+        let key = provider_key(ProviderKey::ElevenLabs, "ElevenLabs")?;
+        let metadata = std::fs::symlink_metadata(&request.reference_path)
+            .map_err(|_| advanced_resource("voice reference audio is unavailable"))?;
+        if !metadata.file_type().is_file()
+            || metadata.file_type().is_symlink()
+            || metadata.len() == 0
+            || metadata.len() > 100 * 1024 * 1024
+        {
+            return Err(advanced_invalid(
+                "voice reference audio is invalid or too large",
+            ));
+        }
+        let bytes = std::fs::read(&request.reference_path)
+            .map_err(|_| advanced_resource("voice reference audio could not be read"))?;
+        let file_name = request
+            .reference_path
+            .file_name()
+            .and_then(|value| value.to_str())
+            .unwrap_or("voice-reference.wav")
+            .to_string();
+        let part = reqwest::blocking::multipart::Part::bytes(bytes).file_name(file_name);
+        let form = reqwest::blocking::multipart::Form::new()
+            .text("name", request.voice_name.clone())
+            .part("files", part);
+        let client = reqwest::blocking::Client::builder()
+            .no_proxy()
+            .redirect(reqwest::redirect::Policy::none())
+            .connect_timeout(std::time::Duration::from_secs(15))
+            .timeout(std::time::Duration::from_secs(180))
+            .build()
+            .map_err(|_| advanced_execution("voice provider client initialization failed"))?;
+        let response = client
+            .post("https://api.elevenlabs.io/v1/voices/add")
+            .header("xi-api-key", key.clone())
+            .multipart(form)
+            .send()
+            .map_err(|_| advanced_execution("voice enrollment request failed"))?;
+        let response = bounded_json_response(response, "voice")?;
+        let provider_voice_id = response
+            .get("voice_id")
+            .and_then(serde_json::Value::as_str)
+            .filter(|value| valid_provider_resource_id(value))
+            .map(str::to_string)
+            .ok_or_else(|| advanced_execution("voice provider returned no valid voice id"))?;
+        if cancel.checkpoint() {
+            let _ = client
+                .delete(format!(
+                    "https://api.elevenlabs.io/v1/voices/{provider_voice_id}"
+                ))
+                .header("xi-api-key", key)
+                .timeout(std::time::Duration::from_secs(10))
+                .send();
+            return Err(cancelled_workflow("voice enrollment cancelled"));
+        }
+        Ok(provider_voice_id)
+    }
+
+    fn generate(
+        &self,
+        request: &VoiceGenerationRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<VoiceProviderOutput, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("voice generation cancelled"));
+        }
+        if !valid_provider_resource_id(&request.provider_voice_id) {
+            return Err(advanced_invalid("voice provider id is invalid"));
+        }
+        let key = provider_key(ProviderKey::ElevenLabs, "ElevenLabs")?;
+        let client = reqwest::blocking::Client::builder()
+            .no_proxy()
+            .redirect(reqwest::redirect::Policy::none())
+            .connect_timeout(std::time::Duration::from_secs(15))
+            .timeout(std::time::Duration::from_secs(180))
+            .build()
+            .map_err(|_| advanced_execution("voice provider client initialization failed"))?;
+        let mut response = client
+            .post(format!(
+                "https://api.elevenlabs.io/v1/text-to-speech/{}",
+                request.provider_voice_id
+            ))
+            .header("xi-api-key", key)
+            .json(&json!({"text": request.prompt, "model_id": request.model}))
+            .send()
+            .map_err(|_| advanced_execution("voice generation request failed"))?;
+        if !response.status().is_success() {
+            return Err(advanced_execution(format!(
+                "voice provider returned HTTP {}",
+                response.status()
+            )));
+        }
+        if response
+            .content_length()
+            .is_some_and(|length| length > 100 * 1024 * 1024)
+        {
+            return Err(advanced_execution("voice output is too large"));
+        }
+        let media_type = response
+            .headers()
+            .get(reqwest::header::CONTENT_TYPE)
+            .and_then(|value| value.to_str().ok())
+            .and_then(|value| value.split(';').next())
+            .unwrap_or("audio/mpeg")
+            .to_string();
+        let mut output = std::fs::OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .open(&request.destination)
+            .map_err(|_| advanced_execution("voice output staging is unavailable"))?;
+        let mut total = 0_u64;
+        let mut buffer = [0_u8; 64 * 1024];
+        loop {
+            if cancel.checkpoint() {
+                let _ = std::fs::remove_file(&request.destination);
+                return Err(cancelled_workflow("voice generation cancelled"));
+            }
+            let count = response
+                .read(&mut buffer)
+                .map_err(|_| advanced_execution("voice output stream failed"))?;
+            if count == 0 {
+                break;
+            }
+            total = total.saturating_add(count as u64);
+            if total > 100 * 1024 * 1024 {
+                let _ = std::fs::remove_file(&request.destination);
+                return Err(advanced_execution("voice output is too large"));
+            }
+            output
+                .write_all(&buffer[..count])
+                .map_err(|_| advanced_execution("voice output staging failed"))?;
+        }
+        output
+            .sync_all()
+            .map_err(|_| advanced_execution("voice output staging failed"))?;
+        if total == 0 {
+            let _ = std::fs::remove_file(&request.destination);
+            return Err(advanced_execution("voice provider returned empty audio"));
+        }
+        Ok(VoiceProviderOutput {
+            request_id: format!("tts-{}", uuid::Uuid::new_v4()),
+            media_type,
+        })
+    }
+
+    fn revoke(
+        &self,
+        provider_voice_id: &str,
+        cancel: &MediaCancelToken,
+    ) -> Result<(), AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("voice revocation cancelled"));
+        }
+        if !valid_provider_resource_id(provider_voice_id) {
+            return Err(advanced_invalid("voice provider id is invalid"));
+        }
+        let key = provider_key(ProviderKey::ElevenLabs, "ElevenLabs")?;
+        let client = reqwest::blocking::Client::builder()
+            .no_proxy()
+            .redirect(reqwest::redirect::Policy::none())
+            .connect_timeout(std::time::Duration::from_secs(15))
+            .timeout(std::time::Duration::from_secs(60))
+            .build()
+            .map_err(|_| advanced_execution("voice provider client initialization failed"))?;
+        let response = client
+            .delete(format!(
+                "https://api.elevenlabs.io/v1/voices/{provider_voice_id}"
+            ))
+            .header("xi-api-key", key)
+            .send()
+            .map_err(|_| advanced_execution("voice revocation request failed"))?;
+        if !response.status().is_success() && response.status() != reqwest::StatusCode::NOT_FOUND {
+            return Err(advanced_execution(format!(
+                "voice provider returned HTTP {}",
+                response.status()
+            )));
+        }
+        // Once the provider has accepted deletion, the local revocation record
+        // must be committed even if cancellation arrives concurrently. Returning
+        // Cancelled here would leave an apparently active local model whose
+        // remote identity has already been irreversibly removed.
+        Ok(())
+    }
+}
+
+impl CaptionTranslationProvider for NetworkCaptionTranslationProvider {
+    fn translate(
+        &self,
+        provider: &str,
+        model: &str,
+        source_locale: &str,
+        target_locale: &str,
+        captions: &[CaptionTranslationDraft],
+        cancel: &MediaCancelToken,
+    ) -> Result<CaptionTranslationProviderResult, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("caption translation cancelled"));
+        }
+        let key = match provider {
+            "openai" => ProviderKey::OpenAI,
+            "anthropic" => ProviderKey::Anthropic,
+            _ => {
+                return Err(AdvancedWorkflowError::new(
+                    AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                    "caption translation supports OpenAI or Anthropic",
+                ))
+            }
+        };
+        let secret = KeyringStore::new()
+            .load(key.account())
+            .map_err(|error| advanced_execution(format!("could not read {provider} key: {error}")))?
+            .ok_or_else(|| {
+                AdvancedWorkflowError::new(
+                    AdvancedWorkflowErrorKind::ConsentRequired,
+                    format!("no {provider} API key is configured; open Settings → AI"),
+                )
+            })?;
+        let payload = serde_json::to_string(captions)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let instruction = format!(
+            "Translate every caption from locale {source_locale} to {target_locale}. Preserve meaning and natural subtitle phrasing. Return only JSON with shape {{\"translations\":[{{\"id\":string,\"text\":string}}],\"errors\":[{{\"id\":string,\"message\":string}}]}}. Every input id must appear exactly once in translations or errors. Never change ids. Captions: {payload}"
+        );
+        let client = reqwest::blocking::Client::builder()
+            .connect_timeout(std::time::Duration::from_secs(10))
+            .timeout(std::time::Duration::from_secs(120))
+            .build()
+            .map_err(|error| advanced_execution(format!("translation client: {error}")))?;
+        let response = match provider {
+            "openai" => client
+                .post("https://api.openai.com/v1/chat/completions")
+                .bearer_auth(secret)
+                .json(&json!({
+                    "model": model,
+                    "temperature": 0,
+                    "response_format": {"type": "json_object"},
+                    "messages": [
+                        {"role": "system", "content": "You are a precise audiovisual subtitle translator."},
+                        {"role": "user", "content": instruction}
+                    ]
+                }))
+                .send(),
+            "anthropic" => client
+                .post("https://api.anthropic.com/v1/messages")
+                .header("x-api-key", secret)
+                .header("anthropic-version", "2023-06-01")
+                .json(&json!({
+                    "model": model,
+                    "max_tokens": 8192,
+                    "temperature": 0,
+                    "system": "You are a precise audiovisual subtitle translator. Return only JSON.",
+                    "messages": [{"role": "user", "content": instruction}]
+                }))
+                .send(),
+            _ => unreachable!(),
+        }
+        .map_err(|error| advanced_execution(format!("caption translation network error: {error}")))?;
+        if !response.status().is_success() {
+            return Err(advanced_execution(format!(
+                "caption translation provider returned HTTP {}",
+                response.status()
+            )));
+        }
+        const MAX_PROVIDER_RESPONSE_BYTES: u64 = 4 * 1024 * 1024;
+        if response
+            .content_length()
+            .is_some_and(|bytes| bytes > MAX_PROVIDER_RESPONSE_BYTES)
+        {
+            return Err(advanced_execution(
+                "translation provider response is too large",
+            ));
+        }
+        let response = response;
+        let mut body = Vec::new();
+        response
+            .take(MAX_PROVIDER_RESPONSE_BYTES + 1)
+            .read_to_end(&mut body)
+            .map_err(|error| {
+                advanced_execution(format!("could not read provider response: {error}"))
+            })?;
+        if body.len() as u64 > MAX_PROVIDER_RESPONSE_BYTES {
+            return Err(advanced_execution(
+                "translation provider response is too large",
+            ));
+        }
+        let wire: serde_json::Value = serde_json::from_slice(&body)
+            .map_err(|error| advanced_execution(format!("invalid provider response: {error}")))?;
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("caption translation cancelled"));
+        }
+        let raw = if provider == "openai" {
+            wire.pointer("/choices/0/message/content")
+        } else {
+            wire.pointer("/content/0/text")
+        }
+        .and_then(serde_json::Value::as_str)
+        .ok_or_else(|| advanced_execution("translation provider returned no JSON content"))?;
+        let raw = raw
+            .trim()
+            .strip_prefix("```json")
+            .or_else(|| raw.trim().strip_prefix("```"))
+            .unwrap_or(raw.trim())
+            .trim()
+            .strip_suffix("```")
+            .unwrap_or(raw.trim())
+            .trim();
+        serde_json::from_str(raw)
+            .map_err(|error| advanced_execution(format!("invalid translation JSON: {error}")))
+    }
+}
+
+pub struct AdvancedWorkflowCommandState {
+    bridge: Arc<TauriAdvancedWorkflowBridge>,
+    active: Mutex<Option<MediaCancelToken>>,
+}
+
+impl AdvancedWorkflowCommandState {
+    pub fn new(bridge: Arc<TauriAdvancedWorkflowBridge>) -> Self {
+        Self {
+            bridge,
+            active: Mutex::new(None),
+        }
+    }
+
+    fn begin(&self) -> Result<MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("advanced_workflow_busy".to_string());
+        }
+        let token = MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    pub fn cancel_active(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+}
+
+#[derive(Default)]
+pub struct MattingModelInstallState {
+    active: Mutex<Option<MediaCancelToken>>,
+}
+
+impl MattingModelInstallState {
+    fn begin(&self) -> Result<MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("matting_model_download_busy".to_string());
+        }
+        let token = MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+}
+
+#[derive(Clone, Debug, Serialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct MattingModelStatusDto {
+    pub installed: bool,
+    pub model: String,
+    pub bytes: u64,
+    pub sha256: String,
+}
+
+#[derive(Clone, Debug, Serialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+struct MattingProgressDto {
+    fraction: f64,
+    downloaded_bytes: u64,
+    total_bytes: u64,
+}
+
+#[derive(Clone, Debug, Serialize, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct GenerateMatteResultDto {
+    pub result: serde_json::Value,
+    pub action_name: Option<String>,
+}
+
+#[tauri::command]
+pub fn matting_model_status(media: State<'_, MediaState>) -> MattingModelStatusDto {
+    let installed = verify_rvm_model(media.engine().models_dir()).is_ok();
+    MattingModelStatusDto {
+        installed,
+        model: opentake_media::analysis::RVM_MODEL_ID.to_string(),
+        bytes: opentake_media::analysis::RVM_MODEL_BYTES,
+        sha256: opentake_media::analysis::RVM_MODEL_SHA256.to_string(),
+    }
+}
+
+#[tauri::command]
+pub async fn download_matting_model(
+    app: AppHandle,
+    media: State<'_, MediaState>,
+    state: State<'_, MattingModelInstallState>,
+) -> Result<MattingModelStatusDto, String> {
+    let token = state.begin()?;
+    let models_dir = media.engine().models_dir().to_path_buf();
+    let progress_app = app.clone();
+    let progress = Arc::new(move |downloaded_bytes: u64, total_bytes: u64| {
+        let fraction = if total_bytes == 0 {
+            0.0
+        } else {
+            downloaded_bytes as f64 / total_bytes as f64
+        };
+        let _ = progress_app.emit(
+            "matting://progress",
+            MattingProgressDto {
+                fraction: fraction.clamp(0.0, 1.0),
+                downloaded_bytes,
+                total_bytes,
+            },
+        );
+    });
+    let result = opentake_media::analysis::download_rvm_model(&models_dir, &token, Some(progress))
+        .await
+        .map_err(|error| error.to_string());
+    state.finish(&token);
+    result?;
+    Ok(matting_model_status(media))
+}
+
+#[tauri::command]
+pub fn cancel_matting_model_download(state: State<'_, MattingModelInstallState>) -> bool {
+    state.cancel()
+}
+
+#[tauri::command]
+pub async fn advanced_track_motion(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: TrackMotionArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(AdvancedWorkflowRequest::TrackMotion(request), &worker_token)
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_generate_matte(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: GenerateMatteArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(
+            AdvancedWorkflowRequest::GenerateMatte(request),
+            &worker_token,
+        )
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_remove_object(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: RemoveObjectArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(
+            AdvancedWorkflowRequest::RemoveObject(request),
+            &worker_token,
+        )
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_match_color(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: MatchColorArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(AdvancedWorkflowRequest::MatchColor(request), &worker_token)
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_translate_captions(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: TranslateCaptionsArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(
+            AdvancedWorkflowRequest::TranslateCaptions(request),
+            &worker_token,
+        )
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_script_to_video(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: ScriptToVideoArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(
+            AdvancedWorkflowRequest::ScriptToVideo(request),
+            &worker_token,
+        )
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_generate_avatar(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: GenerateAvatarArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(
+            AdvancedWorkflowRequest::GenerateAvatar(request),
+            &worker_token,
+        )
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[tauri::command]
+pub async fn advanced_clone_voice(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: CloneVoiceArgs,
+) -> Result<GenerateMatteResultDto, String> {
+    let token = state.begin()?;
+    let bridge = Arc::clone(&state.bridge);
+    let worker_token = token.clone();
+    let result = tauri::async_runtime::spawn_blocking(move || {
+        bridge.execute(AdvancedWorkflowRequest::CloneVoice(request), &worker_token)
+    })
+    .await
+    .map_err(|error| format!("advanced workflow worker failed: {error}"))
+    .and_then(|result| result.map_err(|error| error.message));
+    state.finish(&token);
+    let commit = result?;
+    Ok(GenerateMatteResultDto {
+        result: commit.result,
+        action_name: commit.action_name,
+    })
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ApplyCaptionTranslationReviewRequest {
+    project_epoch: u64,
+    version: u64,
+    source_locale: String,
+    target_locale: String,
+    provider: String,
+    model: String,
+    changes: Vec<CaptionTranslationReviewChange>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct CaptionTranslationReviewChange {
+    id: String,
+    source_text: String,
+    translated_text: String,
+}
+
+#[tauri::command]
+pub fn advanced_apply_caption_translation_review(
+    state: State<'_, AdvancedWorkflowCommandState>,
+    request: ApplyCaptionTranslationReviewRequest,
+) -> Result<GenerateMatteResultDto, String> {
+    if request.changes.is_empty() || request.changes.len() > 500 {
+        return Err("select between 1 and 500 translated captions to apply".into());
+    }
+    if request.source_locale.is_empty()
+        || request.source_locale.len() > 64
+        || request.target_locale.is_empty()
+        || request.target_locale.len() > 64
+        || request.provider.is_empty()
+        || request.provider.len() > 32
+        || request.model.is_empty()
+        || request.model.len() > 128
+        || request.changes.iter().any(|change| {
+            change.id.is_empty()
+                || change.id.len() > 256
+                || change.source_text.len() > 20_000
+                || change.translated_text.len() > 20_000
+        })
+    {
+        return Err("caption translation review contains invalid or oversized fields".into());
+    }
+    let changes = request
+        .changes
+        .into_iter()
+        .map(|change| CaptionTranslationChange {
+            clip_id: change.id,
+            expected_source_text: change.source_text.clone(),
+            translated_text: change.translated_text,
+            input: CaptionTranslationInput {
+                source_text: change.source_text,
+                source_locale: request.source_locale.clone(),
+                target_locale: request.target_locale.clone(),
+                provider: request.provider.clone(),
+                model: request.model.clone(),
+            },
+        })
+        .collect();
+    let edit = state
+        .bridge
+        .core
+        .apply_at_revision(
+            ProjectRevision {
+                project_epoch: request.project_epoch,
+                version: request.version,
+            },
+            EditCommand::ApplyCaptionTranslations { changes },
+        )
+        .map_err(|error| error.to_string())?;
+    Ok(GenerateMatteResultDto {
+        result: json!({"applied": edit.changed}),
+        action_name: edit.changed.then_some(edit.action_name),
+    })
+}
+
+#[tauri::command]
+pub fn cancel_advanced_workflow(state: State<'_, AdvancedWorkflowCommandState>) -> bool {
+    state.cancel_active()
+}
+
+impl TauriAdvancedWorkflowBridge {
+    pub fn new(core: AppCore, cache_root: PathBuf, models_dir: PathBuf) -> Self {
+        Self {
+            core,
+            avatar_provider: Arc::new(NetworkFalAvatarProvider {
+                cache_root: cache_root.clone(),
+            }),
+            cache_root,
+            models_dir,
+            caption_translator: Arc::new(NetworkCaptionTranslationProvider),
+            voice_provider: Arc::new(NetworkElevenLabsVoiceProvider),
+        }
+    }
+
+    #[cfg(test)]
+    fn with_caption_translator(
+        core: AppCore,
+        cache_root: PathBuf,
+        models_dir: PathBuf,
+        caption_translator: Arc<dyn CaptionTranslationProvider>,
+    ) -> Self {
+        Self {
+            core,
+            avatar_provider: Arc::new(NetworkFalAvatarProvider {
+                cache_root: cache_root.clone(),
+            }),
+            cache_root,
+            models_dir,
+            caption_translator,
+            voice_provider: Arc::new(NetworkElevenLabsVoiceProvider),
+        }
+    }
+
+    #[cfg(test)]
+    fn with_identity_providers(
+        core: AppCore,
+        cache_root: PathBuf,
+        models_dir: PathBuf,
+        avatar_provider: Arc<dyn AvatarProvider>,
+        voice_provider: Arc<dyn VoiceCloneProvider>,
+    ) -> Self {
+        Self {
+            core,
+            cache_root,
+            models_dir,
+            caption_translator: Arc::new(NetworkCaptionTranslationProvider),
+            avatar_provider,
+            voice_provider,
+        }
+    }
+
+    fn track_motion(
+        &self,
+        args: TrackMotionArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        let snapshot = self.core.runtime_snapshot();
+        let clip = snapshot
+            .timeline
+            .tracks
+            .iter()
+            .flat_map(|track| &track.clips)
+            .find(|clip| clip.id == args.clip_id)
+            .cloned()
+            .ok_or_else(|| advanced_resource(format!("clip not found: {}", args.clip_id)))?;
+        if clip.media_type != opentake_domain::ClipType::Video || clip.nested_sequence_id.is_some()
+        {
+            return Err(advanced_invalid(
+                "motion tracking requires an ordinary video clip",
+            ));
+        }
+        let region: opentake_agent::tools::args::MotionRegionArg =
+            serde_json::from_value(args.region)
+                .map_err(|error| advanced_invalid(error.to_string()))?;
+        let region = NormalizedMotionRegion {
+            x: region.x,
+            y: region.y,
+            width: region.width,
+            height: region.height,
+        };
+        let clip_end = clip.start_frame + clip.duration_frames;
+        let start = args.start_frame.unwrap_or(clip.start_frame);
+        let end = args.end_frame.unwrap_or(clip_end);
+        if start < clip.start_frame || end > clip_end || end - start < 2 {
+            return Err(advanced_invalid(
+                "startFrame/endFrame must be a non-empty range inside the clip",
+            ));
+        }
+        let first_relative = start - clip.start_frame;
+        let last_relative = end - clip.start_frame - 1;
+        let sample_count = (last_relative - first_relative + 1).clamp(2, 48) as usize;
+        let relative_frames = (0..sample_count)
+            .map(|index| {
+                (first_relative as f64
+                    + index as f64 * (last_relative - first_relative) as f64
+                        / (sample_count - 1) as f64)
+                    .round() as i32
+            })
+            .collect::<Vec<_>>();
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        let source_start = clip.trim_start_frame as f64 / fps;
+        let times = relative_frames
+            .iter()
+            .map(|frame| source_start + *frame as f64 * clip.speed.max(0.0001) / fps)
+            .collect::<Vec<_>>();
+        let (path, is_video) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+                .map_err(advanced_resource)?;
+        if !is_video {
+            return Err(advanced_invalid("motion tracking source is not a video"));
+        }
+        let request = FrameRequest {
+            max_size: (640, 360),
+            tolerance_secs: 0.05,
+            ..FrameRequest::default()
+        };
+        let decoded = decode_frames_at_cancellable(&path, &times, &request, cancel);
+        let mut frames = decoded
+            .into_iter()
+            .filter_map(Result::ok)
+            .map(|(actual, frame)| {
+                let relative =
+                    ((actual - source_start) * fps / clip.speed.max(0.0001)).round() as i32;
+                (relative.clamp(first_relative, last_relative), frame)
+            })
+            .collect::<Vec<_>>();
+        if cancel.is_cancelled() {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::Cancelled,
+                "motion tracking cancelled",
+            ));
+        }
+        frames.sort_by_key(|(frame, _)| *frame);
+        frames.dedup_by_key(|(frame, _)| *frame);
+        let tracked = track_region_motion(&frames, region, cancel)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        if tracked.minimum_confidence < 0.25 {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::AnalysisLowConfidence,
+                format!(
+                    "motion tracking confidence {:.3} is below the 0.25 threshold",
+                    tracked.minimum_confidence
+                ),
+            ));
+        }
+        let keyframes = position_keyframes(&clip, &tracked);
+        let apply_requested = args.apply.unwrap_or(false);
+        let (applied, action_name) = if apply_requested {
+            let result = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: snapshot.project_epoch,
+                        version: snapshot.version,
+                    },
+                    EditCommand::SetKeyframes {
+                        clip_id: clip.id.clone(),
+                        property: KeyframeProperty::Position,
+                        payload: KeyframePayload::Pair(KeyframeTrack::from_keyframes(
+                            keyframes.clone(),
+                        )),
+                    },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            (result.changed, result.changed.then_some(result.action_name))
+        } else {
+            (false, None)
+        };
+        let response_keyframes = keyframes
+            .iter()
+            .map(|keyframe| {
+                json!({
+                    "frame": keyframe.frame,
+                    "position": {"x": keyframe.value.a, "y": keyframe.value.b},
+                    "interpolation": "linear"
+                })
+            })
+            .collect::<Vec<_>>();
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "clipId": clip.id,
+                "applied": applied,
+                "algorithm": "opentake.region-block-match",
+                "algorithmVersion": 1,
+                "minimumConfidence": tracked.minimum_confidence,
+                "region": {"x": region.x, "y": region.y, "width": region.width, "height": region.height},
+                "keyframes": response_keyframes
+            }),
+            action_name,
+        })
+    }
+
+    fn generate_matte(
+        &self,
+        args: GenerateMatteArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("advanced video workflow cancelled"));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let clip = snapshot
+            .timeline
+            .tracks
+            .iter()
+            .flat_map(|track| &track.clips)
+            .find(|clip| clip.id == args.clip_id)
+            .cloned()
+            .ok_or_else(|| advanced_resource(format!("clip not found: {}", args.clip_id)))?;
+        if clip.media_type != opentake_domain::ClipType::Video
+            || clip.nested_sequence_id.is_some()
+            || clip.reversed
+            || (clip.speed - 1.0).abs() > f64::EPSILON
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "matting currently requires an ordinary forward 1x video clip",
+            ));
+        }
+        let installed = verify_rvm_model(&self.models_dir).map_err(|error| {
+            AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                error.to_string(),
+            )
+        })?;
+        if args
+            .model
+            .as_deref()
+            .is_some_and(|model| model != installed.id)
+        {
+            return Err(advanced_invalid(format!(
+                "unsupported matting model; installed model is {}",
+                installed.id
+            )));
+        }
+        let clip_end = clip.start_frame + clip.duration_frames;
+        let start = args.start_frame.unwrap_or(clip.start_frame);
+        let end = args.end_frame.unwrap_or(clip_end);
+        if start < clip.start_frame || end > clip_end || start >= end {
+            return Err(advanced_invalid(
+                "startFrame/endFrame must be a non-empty range inside the clip",
+            ));
+        }
+        let (source_path, is_video) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+                .map_err(advanced_resource)?;
+        if !is_video {
+            return Err(advanced_invalid("matting source is not a video"));
+        }
+        let source_sha256 =
+            file_sha256(&source_path).map_err(|error| advanced_execution(error.to_string()))?;
+        let key_seed = format!(
+            "{}|{}|{}|{}|{}|{}|{}",
+            source_sha256,
+            installed.sha256,
+            clip.trim_start_frame,
+            clip.duration_frames,
+            snapshot.timeline.fps,
+            start,
+            end
+        );
+        let cache_key = format!("{:x}", Sha256::digest(key_seed.as_bytes()));
+        let cache_dir = self.cache_root.join("matting");
+        std::fs::create_dir_all(&cache_dir)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let cache_path = cache_dir.join(format!("{cache_key}.mov"));
+        if !cache_path.exists() {
+            materialize_matte_video(
+                &source_path,
+                &cache_path,
+                &clip,
+                snapshot.timeline.fps,
+                start,
+                end,
+                &self.models_dir,
+                cancel,
+            )?;
+        }
+        let mut cached_file = open_verified_regular_file(&cache_path)?;
+        let output_probe = opentake_media::probe::probe_file(&cached_file)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let expected_duration = clip.duration_frames as f64 / snapshot.timeline.fps.max(1) as f64;
+        if !output_probe.has_video
+            || output_probe.width.is_none()
+            || output_probe.height.is_none()
+            || output_probe
+                .fps
+                .is_none_or(|fps| (fps - snapshot.timeline.fps as f64).abs() > 0.01)
+            || (output_probe.duration_secs - expected_duration).abs()
+                > 1.5 / snapshot.timeline.fps.max(1) as f64
+        {
+            return Err(advanced_execution("matting output probe failed"));
+        }
+        let apply_requested = args.apply.unwrap_or(false);
+        let mut asset_id = None;
+        let mut action_name = None;
+        let applied = if apply_requested {
+            let project_dir = snapshot.project_dir.clone().ok_or_else(|| {
+                advanced_invalid("save the project before applying a generated matte")
+            })?;
+            let project_media = crate::library::ProjectMediaCapability::open_verified(
+                &self.core,
+                snapshot.project_epoch,
+                &project_dir,
+                true,
+            )
+            .map_err(advanced_execution)?;
+            let leaf_name = format!("matte-{}.mov", uuid::Uuid::new_v4());
+            let mut published = project_media
+                .create_import(Path::new(&leaf_name))
+                .map_err(advanced_execution)?;
+            cached_file
+                .seek(SeekFrom::Start(0))
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            std::io::copy(&mut cached_file, published.file_mut())
+                .and_then(|_| published.file_mut().flush())
+                .and_then(|_| published.file().sync_all())
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            if !project_media
+                .matches_leaf(&published)
+                .map_err(advanced_execution)?
+            {
+                return Err(advanced_execution(
+                    "matting output identity changed before project commit",
+                ));
+            }
+            let provenance = GenerationInput {
+                prompt: json!({"kind":"aiMatte","startFrame":start,"endFrame":end}).to_string(),
+                model: installed.id.clone(),
+                duration: clip.duration_frames,
+                aspect_ratio: format!(
+                    "{}:{}",
+                    output_probe.width.unwrap_or(0),
+                    output_probe.height.unwrap_or(0)
+                ),
+                provider: Some("opentake-matting".into()),
+                status: Some(GenerationJobStatus::Ready),
+                source_asset_id: Some(clip.media_ref.clone()),
+                source_clip_id: Some(clip.id.clone()),
+                source_start_frame: Some(start),
+                source_end_frame: Some(end),
+                ..GenerationInput::default()
+            };
+            let committed = self.core.commit_motion_media_for_project(
+                snapshot.project_epoch,
+                snapshot.version,
+                &project_dir,
+                published.path(),
+                "AI Matte",
+                &ProbedMedia {
+                    duration_secs: output_probe.duration_secs,
+                    width: output_probe
+                        .width
+                        .and_then(|value| i32::try_from(value).ok()),
+                    height: output_probe
+                        .height
+                        .and_then(|value| i32::try_from(value).ok()),
+                    fps: output_probe.fps,
+                    has_audio: output_probe.has_audio,
+                    color: output_probe.color,
+                },
+                provenance,
+                MotionPlacement::Replace {
+                    clip_id: clip.id.clone(),
+                },
+            );
+            let committed = match committed {
+                Ok(committed) => committed,
+                Err(error) => return Err(advanced_execution(error.to_string())),
+            };
+            published.commit();
+            asset_id = Some(committed.media.id);
+            action_name = Some(committed.edit.action_name);
+            true
+        } else {
+            false
+        };
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "clipId": clip.id,
+                "sourceMediaRef": clip.media_ref,
+                "assetId": asset_id,
+                "applied": applied,
+                "cacheKey": cache_key,
+                "previewPath": cache_path,
+                "frameCount": clip.duration_frames,
+                "width": output_probe.width,
+                "height": output_probe.height,
+                "fps": output_probe.fps,
+                "model": installed.id,
+                "modelSha256": installed.sha256,
+                "sourceSha256": source_sha256,
+                "startFrame": start,
+                "endFrame": end
+            }),
+            action_name,
+        })
+    }
+
+    fn remove_object(
+        &self,
+        args: RemoveObjectArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("object removal cancelled"));
+        }
+        const PROVIDER: &str = "opentake-local";
+        const MODEL: &str = "opentake-boundary-fill-v1";
+        if args
+            .provider
+            .as_deref()
+            .is_some_and(|provider| provider != PROVIDER && provider != "local")
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "this build supports only the on-device opentake-local object-removal provider",
+            ));
+        }
+        if args.model.as_deref().is_some_and(|model| model != MODEL) {
+            return Err(advanced_invalid(format!(
+                "unsupported object-removal model; available model is {MODEL}"
+            )));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let clip = snapshot
+            .timeline
+            .tracks
+            .iter()
+            .flat_map(|track| &track.clips)
+            .find(|clip| clip.id == args.clip_id)
+            .cloned()
+            .ok_or_else(|| advanced_resource(format!("clip not found: {}", args.clip_id)))?;
+        if clip.media_type != opentake_domain::ClipType::Video
+            || clip.nested_sequence_id.is_some()
+            || clip.reversed
+            || (clip.speed - 1.0).abs() > f64::EPSILON
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "object removal currently requires an ordinary forward 1x video clip",
+            ));
+        }
+        let mask_index = parse_mask_index(&args.mask_id)?;
+        let mask = clip.masks.get(mask_index).cloned().ok_or_else(|| {
+            advanced_resource(format!(
+                "mask not found: {} (clip has {} masks)",
+                args.mask_id,
+                clip.masks.len()
+            ))
+        })?;
+        let clip_end = clip.start_frame + clip.duration_frames;
+        let start = args.start_frame.unwrap_or(clip.start_frame);
+        let end = args.end_frame.unwrap_or(clip_end);
+        if start < clip.start_frame || end > clip_end || start >= end {
+            return Err(advanced_invalid(
+                "startFrame/endFrame must be a non-empty range inside the clip",
+            ));
+        }
+        let (source_path, is_video) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+                .map_err(advanced_resource)?;
+        if !is_video {
+            return Err(advanced_invalid("object-removal source is not a video"));
+        }
+        let source_sha256 =
+            file_sha256(&source_path).map_err(|error| advanced_execution(error.to_string()))?;
+        let mask_json =
+            serde_json::to_string(&mask).map_err(|error| advanced_execution(error.to_string()))?;
+        let key_seed = format!(
+            "{source_sha256}|{MODEL}|{}|{}|{}|{start}|{end}|{mask_json}",
+            clip.trim_start_frame, clip.duration_frames, snapshot.timeline.fps
+        );
+        let cache_key = format!("{:x}", Sha256::digest(key_seed.as_bytes()));
+        let cache_dir = self.cache_root.join("object-removal");
+        std::fs::create_dir_all(&cache_dir)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let cache_path = cache_dir.join(format!("{cache_key}.mov"));
+        if !cache_path.exists() {
+            materialize_object_removal_video(
+                &source_path,
+                &cache_path,
+                &clip,
+                snapshot.timeline.fps,
+                start,
+                end,
+                &mask,
+                cancel,
+            )?;
+        }
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("object removal cancelled"));
+        }
+        let mut cached_file = open_verified_regular_file(&cache_path)?;
+        let output_probe = opentake_media::probe::probe_file(&cached_file)
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let expected_duration = clip.duration_frames as f64 / snapshot.timeline.fps.max(1) as f64;
+        if !output_probe.has_video
+            || output_probe.width.is_none()
+            || output_probe.height.is_none()
+            || output_probe
+                .fps
+                .is_none_or(|fps| (fps - snapshot.timeline.fps as f64).abs() > 0.01)
+            || (output_probe.duration_secs - expected_duration).abs()
+                > 1.5 / snapshot.timeline.fps.max(1) as f64
+        {
+            return Err(advanced_execution("object-removal output probe failed"));
+        }
+
+        let mut asset_id = None;
+        let mut action_name = None;
+        let applied = if args.apply.unwrap_or(false) {
+            let project_dir = snapshot.project_dir.clone().ok_or_else(|| {
+                advanced_invalid("save the project before applying object removal")
+            })?;
+            let project_media = crate::library::ProjectMediaCapability::open_verified(
+                &self.core,
+                snapshot.project_epoch,
+                &project_dir,
+                true,
+            )
+            .map_err(advanced_execution)?;
+            let leaf_name = format!("object-removed-{}.mov", uuid::Uuid::new_v4());
+            let mut published = project_media
+                .create_import(Path::new(&leaf_name))
+                .map_err(advanced_execution)?;
+            cached_file
+                .seek(SeekFrom::Start(0))
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            std::io::copy(&mut cached_file, published.file_mut())
+                .and_then(|_| published.file_mut().flush())
+                .and_then(|_| published.file().sync_all())
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            if !project_media
+                .matches_leaf(&published)
+                .map_err(advanced_execution)?
+            {
+                return Err(advanced_execution(
+                    "object-removal output identity changed before project commit",
+                ));
+            }
+            let provenance = GenerationInput {
+                prompt: json!({
+                    "kind":"objectRemoval",
+                    "maskIndex":mask_index,
+                    "mask":mask,
+                    "startFrame":start,
+                    "endFrame":end
+                })
+                .to_string(),
+                model: MODEL.into(),
+                duration: clip.duration_frames,
+                aspect_ratio: format!(
+                    "{}:{}",
+                    output_probe.width.unwrap_or(0),
+                    output_probe.height.unwrap_or(0)
+                ),
+                provider: Some(PROVIDER.into()),
+                status: Some(GenerationJobStatus::Ready),
+                source_asset_id: Some(clip.media_ref.clone()),
+                source_clip_id: Some(clip.id.clone()),
+                source_start_frame: Some(start),
+                source_end_frame: Some(end),
+                ..GenerationInput::default()
+            };
+            let committed = self
+                .core
+                .commit_generated_media_for_project(
+                    snapshot.project_epoch,
+                    snapshot.version,
+                    &project_dir,
+                    published.path(),
+                    "Object Removed",
+                    opentake_domain::ClipType::Video,
+                    &ProbedMedia {
+                        duration_secs: output_probe.duration_secs,
+                        width: output_probe
+                            .width
+                            .and_then(|value| i32::try_from(value).ok()),
+                        height: output_probe
+                            .height
+                            .and_then(|value| i32::try_from(value).ok()),
+                        fps: output_probe.fps,
+                        has_audio: output_probe.has_audio,
+                        color: output_probe.color,
+                    },
+                    provenance,
+                    MotionPlacement::ReplaceAndClearMasks {
+                        clip_id: clip.id.clone(),
+                    },
+                    "Remove Masked Object",
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            published.commit();
+            asset_id = Some(committed.media.id);
+            action_name = Some(committed.edit.action_name);
+            true
+        } else {
+            false
+        };
+
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "clipId": clip.id,
+                "sourceMediaRef": clip.media_ref,
+                "assetId": asset_id,
+                "applied": applied,
+                "cacheKey": cache_key,
+                "previewPath": cache_path,
+                "frameCount": clip.duration_frames,
+                "width": output_probe.width,
+                "height": output_probe.height,
+                "fps": output_probe.fps,
+                "provider": PROVIDER,
+                "model": MODEL,
+                "sourceSha256": source_sha256,
+                "maskIndex": mask_index,
+                "startFrame": start,
+                "endFrame": end
+            }),
+            action_name,
+        })
+    }
+
+    fn match_color(
+        &self,
+        args: MatchColorArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("color match cancelled"));
+        }
+        const ALGORITHM: &str = "opentake-luma-preserving-mean-match";
+        const ALGORITHM_VERSION: u32 = 1;
+        let snapshot = self.core.runtime_snapshot();
+        let clip = snapshot
+            .timeline
+            .tracks
+            .iter()
+            .flat_map(|track| &track.clips)
+            .find(|clip| clip.id == args.clip_id)
+            .cloned()
+            .ok_or_else(|| advanced_resource(format!("clip not found: {}", args.clip_id)))?;
+        if !matches!(
+            clip.media_type,
+            opentake_domain::ClipType::Image | opentake_domain::ClipType::Video
+        ) || clip.nested_sequence_id.is_some()
+            || clip.reversed
+            || (clip.speed - 1.0).abs() > f64::EPSILON
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "color match requires an ordinary forward 1x visual clip",
+            ));
+        }
+        if clip.color_grade.is_some_and(|grade| !grade.is_identity())
+            || clip.lut.is_some()
+            || clip.chroma_key.is_some()
+            || !clip.masks.is_empty()
+            || !clip.effects.is_empty()
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "color match currently requires a target clip without active pixel effects",
+            ));
+        }
+        if args.reference_media_ref == clip.media_ref {
+            return Err(advanced_invalid(
+                "reference media must differ from the target source",
+            ));
+        }
+        let reference = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == args.reference_media_ref)
+            .ok_or_else(|| {
+                advanced_resource(format!(
+                    "reference media not found: {}",
+                    args.reference_media_ref
+                ))
+            })?;
+        if !matches!(
+            reference.kind,
+            opentake_domain::ClipType::Image | opentake_domain::ClipType::Video
+        ) {
+            return Err(advanced_invalid(
+                "reference media must be an image or video",
+            ));
+        }
+        let target_frame = args.target_frame.unwrap_or(clip.start_frame);
+        if !clip.contains(target_frame) {
+            return Err(advanced_invalid(
+                "targetFrame must be inside the target clip",
+            ));
+        }
+        let reference_frame = args.reference_frame.unwrap_or(0);
+        if reference_frame < 0 {
+            return Err(advanced_invalid("referenceFrame must be non-negative"));
+        }
+        if reference.kind == opentake_domain::ClipType::Image && reference_frame != 0 {
+            return Err(advanced_invalid(
+                "image references support only referenceFrame=0",
+            ));
+        }
+
+        let (target_path, _) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+                .map_err(advanced_resource)?;
+        let (reference_path, _) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &args.reference_media_ref)
+                .map_err(advanced_resource)?;
+        let timeline_fps = snapshot.timeline.fps.max(1) as f64;
+        let target_time = (clip.trim_start_frame as f64
+            + (target_frame - clip.start_frame) as f64 * clip.speed)
+            / timeline_fps;
+        let reference_time = if reference.kind == opentake_domain::ClipType::Image {
+            0.0
+        } else {
+            reference_frame as f64 / reference.source_fps.unwrap_or(timeline_fps).max(0.001)
+        };
+        if reference.kind == opentake_domain::ClipType::Video
+            && reference.duration > 0.0
+            && reference_time >= reference.duration
+        {
+            return Err(advanced_invalid(
+                "referenceFrame must be inside the reference video",
+            ));
+        }
+        let request = FrameRequest {
+            max_size: (640, 640),
+            tolerance_secs: 0.1,
+            ..FrameRequest::default()
+        };
+        let target = decode_color_sample(
+            &target_path,
+            target_time,
+            clip.media_type == opentake_domain::ClipType::Image,
+            &request,
+            cancel,
+        )?;
+        let reference_frame_data = decode_color_sample(
+            &reference_path,
+            reference_time,
+            reference.kind == opentake_domain::ClipType::Image,
+            &request,
+            cancel,
+        )?;
+        let target_mean = mean_linear_rgb(&target)?;
+        let reference_mean = mean_linear_rgb(&reference_frame_data)?;
+        let target_luma = luma709(target_mean.r, target_mean.g, target_mean.b);
+        let reference_luma = luma709(reference_mean.r, reference_mean.g, reference_mean.b);
+        if target_luma <= 0.005
+            || reference_luma <= 0.005
+            || [target_mean.r, target_mean.g, target_mean.b]
+                .into_iter()
+                .any(|channel| channel <= 0.001)
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::AnalysisLowConfidence,
+                "color match needs non-black samples with usable values in every channel",
+            ));
+        }
+        let luma_scale = target_luma / reference_luma;
+        let desired = Rgb::new(
+            reference_mean.r * luma_scale,
+            reference_mean.g * luma_scale,
+            reference_mean.b * luma_scale,
+        );
+        let grade = ColorGrade {
+            lift_gamma_gain: LiftGammaGain {
+                gain: Rgb::new(
+                    (desired.r / target_mean.r).clamp(0.0, 4.0),
+                    (desired.g / target_mean.g).clamp(0.0, 4.0),
+                    (desired.b / target_mean.b).clamp(0.0, 4.0),
+                ),
+                ..LiftGammaGain::default()
+            },
+            ..ColorGrade::default()
+        };
+        grade
+            .validate()
+            .map_err(|error| advanced_execution(error.to_string()))?;
+        let (matched_r, matched_g, matched_b) =
+            grade.apply_linear(target_mean.r, target_mean.g, target_mean.b);
+        let matched_mean = Rgb::new(matched_r, matched_g, matched_b);
+        let delta_e_before = delta_e76(target_mean, desired);
+        let delta_e_after = delta_e76(matched_mean, desired);
+        let target_luma_after = luma709(matched_r, matched_g, matched_b);
+        if delta_e_after >= delta_e_before || (target_luma_after - target_luma).abs() > 0.02 {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::AnalysisLowConfidence,
+                "color match could not improve the sample within the luma-preservation limit",
+            ));
+        }
+        let input = ColorMatchInput {
+            reference_media_ref: args.reference_media_ref.clone(),
+            reference_frame,
+            target_frame,
+            algorithm: ALGORITHM.into(),
+            algorithm_version: ALGORITHM_VERSION,
+            target_mean_linear: target_mean,
+            reference_mean_linear: reference_mean,
+            delta_e_before,
+            delta_e_after,
+            target_luma_before: target_luma,
+            target_luma_after,
+        };
+        let apply_requested = args.apply.unwrap_or(false);
+        let (applied, action_name) = if apply_requested {
+            let result = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: snapshot.project_epoch,
+                        version: snapshot.version,
+                    },
+                    EditCommand::ApplyColorMatch {
+                        clip_id: clip.id.clone(),
+                        grade,
+                        input: input.clone(),
+                    },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            (result.changed, result.changed.then_some(result.action_name))
+        } else {
+            (false, None)
+        };
+
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "clipId": clip.id,
+                "referenceMediaRef": args.reference_media_ref,
+                "referenceFrame": reference_frame,
+                "targetFrame": target_frame,
+                "algorithm": ALGORITHM,
+                "algorithmVersion": ALGORITHM_VERSION,
+                "grade": grade,
+                "targetMeanLinear": target_mean,
+                "referenceMeanLinear": reference_mean,
+                "matchedMeanLinear": matched_mean,
+                "deltaEBefore": delta_e_before,
+                "deltaEAfter": delta_e_after,
+                "targetLumaBefore": target_luma,
+                "targetLumaAfter": target_luma_after,
+                "applied": applied
+            }),
+            action_name,
+        })
+    }
+
+    fn separate_stems(
+        &self,
+        args: SeparateStemsArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        const MODEL: &str = "opentake-center-v1";
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("stem separation cancelled"));
+        }
+        if args
+            .provider
+            .as_deref()
+            .is_some_and(|provider| provider != "local" && provider != "opentake-local")
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                "this build supports only the on-device stem provider",
+            ));
+        }
+        if args.model.as_deref().is_some_and(|model| model != MODEL) {
+            return Err(advanced_invalid(format!(
+                "unsupported local stem model; available model is {MODEL}"
+            )));
+        }
+        let requested_start_frame = args.start_frame.unwrap_or(0);
+        if args.import_to_tracks.unwrap_or(false) && requested_start_frame < 0 {
+            return Err(advanced_invalid("startFrame must be non-negative"));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let project_dir = snapshot
+            .project_dir
+            .clone()
+            .ok_or_else(|| advanced_invalid("save the project before separating stems"))?;
+        let source = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == args.media_ref)
+            .cloned()
+            .ok_or_else(|| advanced_resource(format!("media not found: {}", args.media_ref)))?;
+        if !matches!(
+            source.kind,
+            opentake_domain::ClipType::Audio | opentake_domain::ClipType::Video
+        ) || !source
+            .has_audio
+            .unwrap_or(source.kind == opentake_domain::ClipType::Audio)
+        {
+            return Err(advanced_invalid("stem source must contain audio"));
+        }
+        let (source_path, _) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &args.media_ref)
+                .map_err(advanced_resource)?;
+        let output_dir = project_dir
+            .join(opentake_project::layout::MEDIA_DIR)
+            .join(format!("stems-{}", uuid::Uuid::new_v4()));
+        let separated = opentake_media::analysis::separate_stems(
+            StemSeparationRequest {
+                source: &source_path,
+                output_dir: &output_dir,
+                execution: StemExecution::Local {
+                    model_dir: &self.models_dir,
+                },
+            },
+            cancel,
+            None,
+        )
+        .map_err(|error| {
+            let _ = std::fs::remove_dir_all(&output_dir);
+            media_workflow_error(error)
+        })?;
+        if cancel.checkpoint() {
+            let _ = std::fs::remove_dir_all(&output_dir);
+            return Err(cancelled_workflow("stem separation cancelled"));
+        }
+        let vocals_probe = probe(&separated.vocals.path).map_err(media_workflow_error)?;
+        let accompaniment_probe =
+            probe(&separated.accompaniment.path).map_err(media_workflow_error)?;
+        let probed = |value: &opentake_media::probe::MediaProbe| ProbedMedia {
+            duration_secs: value.duration_secs,
+            width: value.width.and_then(|width| i32::try_from(width).ok()),
+            height: value.height.and_then(|height| i32::try_from(height).ok()),
+            fps: value.fps,
+            has_audio: value.has_audio,
+            color: value.color.clone(),
+        };
+        let provenance = |stem: &str| DerivedStemProvenance {
+            source_asset_id: args.media_ref.clone(),
+            source_sha256: separated.provenance.source_sha256.clone(),
+            execution: separated.provenance.execution.clone(),
+            model_sha256: separated.provenance.model_sha256.clone(),
+            stem: stem.into(),
+        };
+        let committed = self
+            .core
+            .import_media_batch_for_project_persisted(
+                snapshot.project_epoch,
+                &project_dir,
+                vec![
+                    PreparedMediaImportOp::ImportDerivedStem {
+                        path: separated.vocals.path,
+                        name: separated.vocals.name,
+                        probe: probed(&vocals_probe),
+                        provenance: provenance("vocals"),
+                    },
+                    PreparedMediaImportOp::ImportDerivedStem {
+                        path: separated.accompaniment.path,
+                        name: separated.accompaniment.name,
+                        probe: probed(&accompaniment_probe),
+                        provenance: provenance("accompaniment"),
+                    },
+                ],
+            )
+            .map_err(|error| {
+                let _ = std::fs::remove_dir_all(&output_dir);
+                advanced_execution(error.to_string())
+            })?;
+        if committed.len() != 2 {
+            return Err(advanced_execution("stem import did not return two assets"));
+        }
+        let vocals_asset_id = committed[0].entry.id.clone();
+        let accompaniment_asset_id = committed[1].entry.id.clone();
+        let mut clip_ids = Vec::new();
+        let mut action_name = None;
+        if args.import_to_tracks.unwrap_or(false) {
+            let start_frame = requested_start_frame;
+            let current = self.core.runtime_snapshot();
+            let duration_frames = (vocals_probe.duration_secs * current.timeline.fps.max(1) as f64)
+                .round()
+                .max(1.0) as i32;
+            let entry = |media_ref: String| ClipEntry {
+                media_ref,
+                media_type: opentake_domain::ClipType::Audio,
+                source_clip_type: opentake_domain::ClipType::Audio,
+                track_index: 0,
+                start_frame,
+                duration_frames,
+                trim_start_frame: None,
+                trim_end_frame: None,
+                has_audio: true,
+                add_linked_audio: false,
+                transform: None,
+            };
+            let placed = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: current.project_epoch,
+                        version: current.version,
+                    },
+                    EditCommand::AddClipsToSeparateAutoTracks {
+                        entries: vec![
+                            entry(vocals_asset_id.clone()),
+                            entry(accompaniment_asset_id.clone()),
+                        ],
+                    },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            clip_ids = placed.affected_clip_ids;
+            action_name = Some(placed.action_name);
+        }
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "sourceMediaRef": args.media_ref,
+                "vocalsAssetId": vocals_asset_id,
+                "accompanimentAssetId": accompaniment_asset_id,
+                "sourceSha256": separated.provenance.source_sha256,
+                "execution": separated.provenance.execution,
+                "modelSha256": separated.provenance.model_sha256,
+                "vocalSdrImprovementDb": separated.metrics.vocal_sdr_improvement_db,
+                "importedToTracks": args.import_to_tracks.unwrap_or(false),
+                "clipIds": clip_ids
+            }),
+            action_name,
+        })
+    }
+
+    fn translate_captions(
+        &self,
+        args: TranslateCaptionsArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("caption translation cancelled"));
+        }
+        if args.caption_clip_ids.is_empty() || args.caption_clip_ids.len() > 500 {
+            return Err(advanced_invalid(
+                "captionClipIds must contain between 1 and 500 captions",
+            ));
+        }
+        let source_locale = args.source_locale.as_deref().unwrap_or("auto").trim();
+        let target_locale = args.target_locale.trim();
+        if source_locale.is_empty()
+            || source_locale.len() > 64
+            || target_locale.is_empty()
+            || target_locale.len() > 64
+            || source_locale.eq_ignore_ascii_case(target_locale)
+        {
+            return Err(advanced_invalid(
+                "sourceLocale and targetLocale must be distinct locale identifiers",
+            ));
+        }
+        let provider = args.provider.as_deref().unwrap_or("openai");
+        let model = args.model.as_deref().unwrap_or(match provider {
+            "openai" => "gpt-4o-mini",
+            "anthropic" => "claude-3-5-haiku-latest",
+            _ => "",
+        });
+        if model.trim().is_empty() || model.len() > 128 {
+            return Err(advanced_invalid("model must be a valid model identifier"));
+        }
+        if args.cost_authorized != Some(true) {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CostAuthorizationRequired,
+                "caption translation sends subtitle text to the selected paid provider; set costAuthorized=true after review",
+            ));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let mut seen = std::collections::HashSet::new();
+        let mut originals = Vec::with_capacity(args.caption_clip_ids.len());
+        let mut source_bytes = 0_usize;
+        for id in &args.caption_clip_ids {
+            if !seen.insert(id.as_str()) {
+                return Err(advanced_invalid(format!("duplicate caption clip: {id}")));
+            }
+            let clip = snapshot
+                .timeline
+                .tracks
+                .iter()
+                .flat_map(|track| &track.clips)
+                .find(|clip| clip.id == *id)
+                .ok_or_else(|| advanced_resource(format!("caption clip not found: {id}")))?;
+            if clip.media_type != opentake_domain::ClipType::Text || clip.caption_group_id.is_none()
+            {
+                return Err(advanced_invalid(format!("clip is not a caption: {id}")));
+            }
+            let text = clip
+                .text_content
+                .as_deref()
+                .filter(|text| !text.trim().is_empty())
+                .ok_or_else(|| advanced_invalid(format!("caption text is empty: {id}")))?;
+            if text.len() > 20_000 {
+                return Err(advanced_invalid(format!("caption text is too large: {id}")));
+            }
+            source_bytes = source_bytes.saturating_add(text.len());
+            if source_bytes > 1_000_000 {
+                return Err(advanced_invalid(
+                    "selected caption text exceeds the 1 MB translation limit",
+                ));
+            }
+            originals.push(CaptionTranslationDraft {
+                id: id.clone(),
+                text: text.to_string(),
+            });
+        }
+        let returned = self.caption_translator.translate(
+            provider,
+            model,
+            source_locale,
+            target_locale,
+            &originals,
+            cancel,
+        )?;
+        if returned
+            .translations
+            .len()
+            .saturating_add(returned.errors.len())
+            > originals.len().saturating_mul(2)
+        {
+            return Err(advanced_execution(
+                "translation provider returned too many caption results",
+            ));
+        }
+        let original_by_id: std::collections::HashMap<&str, &str> = originals
+            .iter()
+            .map(|caption| (caption.id.as_str(), caption.text.as_str()))
+            .collect();
+        let mut response_ids = std::collections::HashSet::new();
+        let mut translations = Vec::new();
+        let mut failures = Vec::new();
+        for translation in returned.translations {
+            if !original_by_id.contains_key(translation.id.as_str())
+                || !response_ids.insert(translation.id.clone())
+            {
+                return Err(advanced_execution(
+                    "translation provider returned an unknown or duplicate caption id",
+                ));
+            }
+            if translation.text.trim().is_empty() || translation.text.len() > 20_000 {
+                failures.push(CaptionTranslationFailure {
+                    id: translation.id,
+                    message: "provider returned empty or oversized translated text".into(),
+                });
+            } else {
+                translations.push(translation);
+            }
+        }
+        for failure in returned.errors {
+            if !original_by_id.contains_key(failure.id.as_str())
+                || !response_ids.insert(failure.id.clone())
+            {
+                return Err(advanced_execution(
+                    "translation provider returned an unknown or duplicate caption id",
+                ));
+            }
+            failures.push(CaptionTranslationFailure {
+                id: failure.id,
+                message: if failure.message.trim().is_empty() {
+                    "provider could not translate this caption".into()
+                } else {
+                    failure.message.chars().take(512).collect()
+                },
+            });
+        }
+        for original in &originals {
+            if !response_ids.contains(&original.id) {
+                failures.push(CaptionTranslationFailure {
+                    id: original.id.clone(),
+                    message: "provider omitted this caption".into(),
+                });
+            }
+        }
+        if translations.is_empty() {
+            return Err(advanced_execution(
+                "caption translation produced no reviewable changes",
+            ));
+        }
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("caption translation cancelled"));
+        }
+        let changes: Vec<CaptionTranslationChange> = translations
+            .iter()
+            .map(|translation| {
+                let source_text = original_by_id[translation.id.as_str()].to_string();
+                CaptionTranslationChange {
+                    clip_id: translation.id.clone(),
+                    expected_source_text: source_text.clone(),
+                    translated_text: translation.text.clone(),
+                    input: CaptionTranslationInput {
+                        source_text,
+                        source_locale: source_locale.to_string(),
+                        target_locale: target_locale.to_string(),
+                        provider: provider.to_string(),
+                        model: model.to_string(),
+                    },
+                }
+            })
+            .collect();
+        let apply_requested = args.apply.unwrap_or(false);
+        let (applied, action_name) = if apply_requested {
+            let edit = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: snapshot.project_epoch,
+                        version: snapshot.version,
+                    },
+                    EditCommand::ApplyCaptionTranslations { changes },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            (edit.changed, edit.changed.then_some(edit.action_name))
+        } else {
+            (false, None)
+        };
+        let review: Vec<serde_json::Value> = translations
+            .into_iter()
+            .map(|translation| {
+                let source_text = original_by_id[translation.id.as_str()];
+                json!({
+                    "id": translation.id,
+                    "sourceText": source_text,
+                    "translatedText": translation.text
+                })
+            })
+            .collect();
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "projectEpoch": snapshot.project_epoch,
+                "version": snapshot.version,
+                "sourceLocale": source_locale,
+                "targetLocale": target_locale,
+                "provider": provider,
+                "model": model,
+                "review": review,
+                "errors": failures,
+                "captionCount": originals.len(),
+                "translatedCount": review.len(),
+                "applied": applied
+            }),
+            action_name,
+        })
+    }
+
+    fn script_to_video(
+        &self,
+        args: ScriptToVideoArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("script assembly cancelled"));
+        }
+        if args.segments.is_empty() || args.segments.len() > 100 {
+            return Err(advanced_invalid(
+                "segments must contain between 1 and 100 reviewed segments",
+            ));
+        }
+        let segment_count = args.segments.len();
+        let snapshot = self.core.runtime_snapshot();
+        let start_frame = snapshot.timeline.total_frames();
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        let mut segments = Vec::with_capacity(args.segments.len());
+        for (index, value) in args.segments.into_iter().enumerate() {
+            let segment: ScriptSegmentArg = serde_json::from_value(value)
+                .map_err(|error| advanced_invalid(format!("segments[{index}]: {error}")))?;
+            if segment.script.trim().is_empty()
+                || segment.script.len() > 20_000
+                || !(1..=36_000).contains(&segment.duration_frames)
+            {
+                return Err(advanced_invalid(format!(
+                    "segments[{index}] requires non-empty script and durationFrames 1..36000"
+                )));
+            }
+            let media = snapshot
+                .media
+                .entries
+                .iter()
+                .find(|entry| entry.id == segment.media_ref)
+                .ok_or_else(|| {
+                    advanced_resource(format!(
+                        "segments[{index}] media not found: {}",
+                        segment.media_ref
+                    ))
+                })?;
+            if !matches!(
+                media.kind,
+                opentake_domain::ClipType::Image
+                    | opentake_domain::ClipType::Video
+                    | opentake_domain::ClipType::Lottie
+            ) {
+                return Err(advanced_invalid(format!(
+                    "segments[{index}].mediaRef must be visual media"
+                )));
+            }
+            if media.kind == opentake_domain::ClipType::Video
+                && media.duration > 0.0
+                && (media.duration * fps).round() as i32 + 1 < segment.duration_frames
+            {
+                return Err(advanced_invalid(format!(
+                    "segments[{index}] is longer than its video source"
+                )));
+            }
+            if let Some(narration_ref) = &segment.narration_media_ref {
+                let narration = snapshot
+                    .media
+                    .entries
+                    .iter()
+                    .find(|entry| entry.id == *narration_ref)
+                    .ok_or_else(|| {
+                        advanced_resource(format!(
+                            "segments[{index}] narration not found: {narration_ref}"
+                        ))
+                    })?;
+                if !matches!(
+                    narration.kind,
+                    opentake_domain::ClipType::Audio | opentake_domain::ClipType::Video
+                ) || !narration
+                    .has_audio
+                    .unwrap_or(narration.kind == opentake_domain::ClipType::Audio)
+                {
+                    return Err(advanced_invalid(format!(
+                        "segments[{index}].narrationMediaRef must contain audio"
+                    )));
+                }
+                let narration_frames = (narration.duration * fps).round() as i32;
+                if narration.duration > 0.0
+                    && (narration_frames - segment.duration_frames).abs() > 1
+                {
+                    return Err(advanced_invalid(format!(
+                        "segments[{index}] narration duration must match within one frame"
+                    )));
+                }
+            }
+            let transition = match segment.transition.as_deref() {
+                None => None,
+                Some("crossDissolve") => Some(TransitionKind::CrossDissolve),
+                Some(other) => {
+                    return Err(advanced_invalid(format!(
+                        "segments[{index}].transition is unsupported: {other}"
+                    )))
+                }
+            };
+            if transition.is_some() && index + 1 == segment_count {
+                return Err(advanced_invalid(
+                    "the final script segment cannot have an outgoing transition",
+                ));
+            }
+            segments.push(ScriptAssemblySegment {
+                script: segment.script,
+                media_ref: segment.media_ref,
+                narration_media_ref: segment.narration_media_ref,
+                duration_frames: segment.duration_frames,
+                transition,
+            });
+        }
+        for index in 0..segments.len().saturating_sub(1) {
+            if segments[index].transition.is_some()
+                && (segments[index].duration_frames < 2 || segments[index + 1].duration_frames < 2)
+            {
+                return Err(advanced_invalid(format!(
+                    "segments[{index}] transition needs at least two frames on both sides"
+                )));
+            }
+        }
+        let canonical = serde_json::to_vec(&json!({
+            "planner": "opentake-script-assembly",
+            "plannerVersion": 1,
+            "startFrame": start_frame,
+            "segments": segments
+        }))
+        .map_err(|error| advanced_execution(error.to_string()))?;
+        let plan_hash = format!("{:x}", Sha256::digest(&canonical));
+        let plan = ScriptAssemblyPlan {
+            id: format!("script-plan-{}", &plan_hash[..16]),
+            plan_hash: plan_hash.clone(),
+            planner: "opentake-script-assembly".into(),
+            planner_version: 1,
+            start_frame,
+            segments,
+        };
+        let apply_requested = args.apply.unwrap_or(false);
+        let (applied, action_name, version) = if apply_requested {
+            if !snapshot
+                .timeline
+                .script_assembly_plans
+                .iter()
+                .any(|existing| existing == &plan)
+            {
+                return Err(advanced_invalid(
+                    "preview and persist this exact script plan before apply=true",
+                ));
+            }
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("script assembly cancelled"));
+            }
+            let edit = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: snapshot.project_epoch,
+                        version: snapshot.version,
+                    },
+                    EditCommand::ApplyScriptAssemblyPlan {
+                        plan_id: plan.id.clone(),
+                    },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            let version = self.core.runtime_snapshot().version;
+            (
+                edit.changed,
+                edit.changed.then_some(edit.action_name),
+                version,
+            )
+        } else {
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("script planning cancelled"));
+            }
+            let edit = self
+                .core
+                .apply_at_revision(
+                    ProjectRevision {
+                        project_epoch: snapshot.project_epoch,
+                        version: snapshot.version,
+                    },
+                    EditCommand::SaveScriptAssemblyPlan { plan: plan.clone() },
+                )
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            let version = self.core.runtime_snapshot().version;
+            (false, edit.changed.then_some(edit.action_name), version)
+        };
+        let mut cursor = start_frame;
+        let review: Vec<serde_json::Value> = plan
+            .segments
+            .iter()
+            .map(|segment| {
+                let segment_start = cursor;
+                cursor += segment.duration_frames;
+                json!({
+                    "script": segment.script,
+                    "mediaRef": segment.media_ref,
+                    "narrationMediaRef": segment.narration_media_ref,
+                    "startFrame": segment_start,
+                    "durationFrames": segment.duration_frames,
+                    "transition": segment.transition
+                })
+            })
+            .collect();
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "projectEpoch": snapshot.project_epoch,
+                "version": version,
+                "planId": plan.id,
+                "planHash": plan_hash,
+                "planner": plan.planner,
+                "plannerVersion": plan.planner_version,
+                "startFrame": start_frame,
+                "endFrame": cursor,
+                "segments": review,
+                "applied": applied
+            }),
+            action_name,
+        })
+    }
+
+    fn generate_avatar(
+        &self,
+        args: GenerateAvatarArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        const PROVIDER: &str = "fal";
+        const MODEL: &str = "fal-ai/sync-lipsync/v3/image-to-video";
+        validate_consent_id(&args.consent_id)?;
+        if args.cost_authorized != Some(true) {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CostAuthorizationRequired,
+                "avatar generation sends the consented portrait and narration to a paid provider; set costAuthorized=true after review",
+            ));
+        }
+        if args
+            .provider
+            .as_deref()
+            .is_some_and(|value| value != PROVIDER)
+            || args.model.as_deref().is_some_and(|value| value != MODEL)
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                format!("this build supports {PROVIDER}:{MODEL}"),
+            ));
+        }
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("avatar generation cancelled"));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let project_dir = snapshot
+            .project_dir
+            .clone()
+            .ok_or_else(|| advanced_invalid("save the project before generating an avatar"))?;
+        let portrait = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == args.portrait_media_ref)
+            .ok_or_else(|| advanced_resource("portrait media does not exist"))?;
+        if portrait.kind != opentake_domain::ClipType::Image {
+            return Err(advanced_invalid("avatar portrait must be an image"));
+        }
+        let audio = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == args.audio_media_ref)
+            .ok_or_else(|| advanced_resource("avatar narration media does not exist"))?;
+        if audio.kind != opentake_domain::ClipType::Audio || !audio.has_audio.unwrap_or(true) {
+            return Err(advanced_invalid("avatar narration must be an audio asset"));
+        }
+        if audio.duration <= 0.0 || audio.duration > 60.0 * 30.0 {
+            return Err(advanced_invalid(
+                "avatar narration duration must be between zero and 30 minutes",
+            ));
+        }
+        let (portrait_path, _) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &args.portrait_media_ref)
+                .map_err(advanced_resource)?;
+        let (audio_path, _) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &args.audio_media_ref)
+                .map_err(advanced_resource)?;
+        let portrait_sha256 = file_sha256(&portrait_path).map_err(media_workflow_error)?;
+        let audio_sha256 = file_sha256(&audio_path).map_err(media_workflow_error)?;
+        let request_hash = canonical_request_hash(&json!({
+            "provider": PROVIDER,
+            "model": MODEL,
+            "consentId": args.consent_id,
+            "portraitMediaRef": args.portrait_media_ref,
+            "portraitSha256": portrait_sha256,
+            "audioMediaRef": args.audio_media_ref,
+            "audioSha256": audio_sha256,
+        }))?;
+        let media_dir = project_dir.join(opentake_project::layout::MEDIA_DIR);
+        std::fs::create_dir_all(&media_dir)
+            .map_err(|_| advanced_execution("project media directory is unavailable"))?;
+        let destination = media_dir.join(format!("avatar-{}.mp4", uuid::Uuid::new_v4()));
+        let output = self.avatar_provider.generate(
+            &AvatarProviderRequest {
+                portrait_path,
+                audio_path,
+                model: MODEL.into(),
+                destination: destination.clone(),
+            },
+            cancel,
+        )?;
+        if cancel.checkpoint() {
+            let _ = std::fs::remove_file(&destination);
+            return Err(cancelled_workflow("avatar generation cancelled"));
+        }
+        let output_probe = probe(&destination).map_err(|error| {
+            let _ = std::fs::remove_file(&destination);
+            media_workflow_error(error)
+        })?;
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        if !output_probe.has_video
+            || !output_probe.has_audio
+            || output_probe.duration_secs <= 0.0
+            || ((output_probe.duration_secs - audio.duration) * fps).abs() > 1.0
+        {
+            let _ = std::fs::remove_file(&destination);
+            return Err(advanced_execution(
+                "avatar output must contain synchronized video/audio matching narration within one frame",
+            ));
+        }
+        let start_frame = args.start_frame.unwrap_or(snapshot.timeline.total_frames());
+        if start_frame < 0 {
+            let _ = std::fs::remove_file(&destination);
+            return Err(advanced_invalid("startFrame must be non-negative"));
+        }
+        let duration_frames = (output_probe.duration_secs * fps).round().max(1.0) as i32;
+        let aspect_ratio = output_probe
+            .width
+            .zip(output_probe.height)
+            .map(|(width, height)| format!("{width}:{height}"))
+            .unwrap_or_else(|| "avatar".into());
+        let provenance = GenerationInput {
+            prompt: "lip-synchronized avatar".into(),
+            model: MODEL.into(),
+            duration: output_probe.duration_secs.round() as i32,
+            aspect_ratio,
+            image_urls: Some(vec![format!("sha256:{portrait_sha256}")]),
+            reference_image_asset_ids: Some(vec![args.portrait_media_ref.clone()]),
+            reference_audio_urls: Some(vec![format!("sha256:{audio_sha256}")]),
+            reference_audio_asset_ids: Some(vec![args.audio_media_ref.clone()]),
+            source_asset_id: Some(args.portrait_media_ref.clone()),
+            provider: Some(PROVIDER.into()),
+            provider_job_id: Some(output.request_id.clone()),
+            status: Some(GenerationJobStatus::Ready),
+            progress: Some(1.0),
+            consent_id: Some(args.consent_id.clone()),
+            request_hash: Some(request_hash.clone()),
+            ..GenerationInput::default()
+        };
+        let probed = ProbedMedia {
+            duration_secs: output_probe.duration_secs,
+            width: output_probe
+                .width
+                .and_then(|value| i32::try_from(value).ok()),
+            height: output_probe
+                .height
+                .and_then(|value| i32::try_from(value).ok()),
+            fps: output_probe.fps,
+            has_audio: output_probe.has_audio,
+            color: output_probe.color.clone(),
+        };
+        let committed = self
+            .core
+            .commit_generated_media_for_project(
+                snapshot.project_epoch,
+                snapshot.version,
+                &project_dir,
+                &destination,
+                "Generated avatar",
+                opentake_domain::ClipType::Video,
+                &probed,
+                provenance,
+                MotionPlacement::Add {
+                    start_frame,
+                    duration_frames,
+                    track_index: None,
+                },
+                "Generate Avatar",
+            )
+            .map_err(|error| {
+                let _ = std::fs::remove_file(&destination);
+                advanced_execution(error.to_string())
+            })?;
+        Ok(AdvancedWorkflowCommit {
+            result: json!({
+                "assetId": committed.media.id,
+                "clipIds": committed.edit.affected_clip_ids,
+                "previewPath": destination,
+                "provider": PROVIDER,
+                "model": MODEL,
+                "providerRequestId": output.request_id,
+                "requestHash": request_hash,
+                "consentId": args.consent_id,
+                "portraitMediaRef": args.portrait_media_ref,
+                "audioMediaRef": args.audio_media_ref,
+                "durationFrames": duration_frames,
+                "mediaType": output.media_type,
+                "imported": true
+            }),
+            action_name: Some(committed.edit.action_name),
+        })
+    }
+
+    fn clone_voice(
+        &self,
+        args: CloneVoiceArgs,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        const PROVIDER: &str = "elevenlabs";
+        const MODEL: &str = "eleven_multilingual_v2";
+        validate_consent_id(&args.consent_id)?;
+        if args
+            .provider
+            .as_deref()
+            .is_some_and(|value| value != PROVIDER)
+            || args.model.as_deref().is_some_and(|value| value != MODEL)
+        {
+            return Err(AdvancedWorkflowError::new(
+                AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                format!("this build supports {PROVIDER}:{MODEL}"),
+            ));
+        }
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("voice workflow cancelled"));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        let project_dir = snapshot
+            .project_dir
+            .clone()
+            .ok_or_else(|| advanced_invalid("save the project before using voice cloning"))?;
+        match args.action.as_str() {
+            "enroll" => {
+                if args.cost_authorized != Some(true) {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::CostAuthorizationRequired,
+                        "voice enrollment sends consented reference audio to a paid provider; set costAuthorized=true after review",
+                    ));
+                }
+                let source_id = args.reference_audio_media_ref.as_deref().ok_or_else(|| {
+                    advanced_invalid("referenceAudioMediaRef is required for enrollment")
+                })?;
+                let voice_name = args
+                    .voice_name
+                    .as_deref()
+                    .map(str::trim)
+                    .filter(|value| !value.is_empty() && value.len() <= 128)
+                    .ok_or_else(|| advanced_invalid("voiceName is required and too long"))?;
+                let source = snapshot
+                    .media
+                    .entries
+                    .iter()
+                    .find(|entry| entry.id == source_id)
+                    .ok_or_else(|| advanced_resource("voice reference media does not exist"))?;
+                if source.kind != opentake_domain::ClipType::Audio
+                    || !source.has_audio.unwrap_or(true)
+                {
+                    return Err(advanced_invalid("voice reference must be an audio asset"));
+                }
+                let (reference_path, _) =
+                    crate::transcribe::resolve_asset_from_snapshot(&snapshot, source_id)
+                        .map_err(advanced_resource)?;
+                let source_sha256 = file_sha256(&reference_path).map_err(media_workflow_error)?;
+                let request_hash = canonical_request_hash(&json!({
+                    "provider": PROVIDER,
+                    "model": MODEL,
+                    "consentId": args.consent_id,
+                    "sourceAudioAssetId": source_id,
+                    "sourceAudioSha256": source_sha256,
+                    "voiceName": voice_name,
+                }))?;
+                let voice_model_id = format!("voice-model-{}", &request_hash[..16]);
+                if snapshot
+                    .timeline
+                    .voice_models
+                    .iter()
+                    .any(|record| record.id == voice_model_id)
+                {
+                    return Err(advanced_invalid(
+                        "this consented voice enrollment is already registered",
+                    ));
+                }
+                let provider_voice_id = self.voice_provider.enroll(
+                    &VoiceEnrollmentRequest {
+                        reference_path,
+                        voice_name: voice_name.to_string(),
+                    },
+                    cancel,
+                )?;
+                if cancel.checkpoint() {
+                    let _ = self
+                        .voice_provider
+                        .revoke(&provider_voice_id, &MediaCancelToken::new());
+                    return Err(cancelled_workflow("voice enrollment cancelled"));
+                }
+                let record = VoiceModelRecord {
+                    id: voice_model_id.clone(),
+                    provider: PROVIDER.into(),
+                    provider_voice_id: provider_voice_id.clone(),
+                    model: MODEL.into(),
+                    consent_id: args.consent_id.clone(),
+                    source_audio_asset_id: source_id.to_string(),
+                    source_audio_sha256: source_sha256,
+                    request_hash: request_hash.clone(),
+                    voice_name: voice_name.to_string(),
+                    revoked: false,
+                };
+                let edit = self
+                    .core
+                    .apply_at_revision_persisted(
+                        ProjectRevision {
+                            project_epoch: snapshot.project_epoch,
+                            version: snapshot.version,
+                        },
+                        EditCommand::SaveVoiceModel {
+                            record: record.clone(),
+                        },
+                    )
+                    .map_err(|error| {
+                        let _ = self
+                            .voice_provider
+                            .revoke(&provider_voice_id, &MediaCancelToken::new());
+                        advanced_execution(error.to_string())
+                    })?;
+                Ok(AdvancedWorkflowCommit {
+                    result: json!({
+                        "action": "enroll",
+                        "voiceId": voice_model_id,
+                        "voiceName": record.voice_name,
+                        "provider": PROVIDER,
+                        "model": MODEL,
+                        "consentId": record.consent_id,
+                        "sourceAudioMediaRef": record.source_audio_asset_id,
+                        "sourceAudioSha256": record.source_audio_sha256,
+                        "requestHash": request_hash,
+                        "revoked": false
+                    }),
+                    action_name: edit.changed.then_some(edit.action_name),
+                })
+            }
+            "generate" => {
+                if args.cost_authorized != Some(true) {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::CostAuthorizationRequired,
+                        "cloned-voice generation uses a paid provider; set costAuthorized=true after review",
+                    ));
+                }
+                let voice_id = args
+                    .voice_id
+                    .as_deref()
+                    .ok_or_else(|| advanced_invalid("voiceId is required for generation"))?;
+                let record = snapshot
+                    .timeline
+                    .voice_models
+                    .iter()
+                    .find(|record| record.id == voice_id)
+                    .cloned()
+                    .ok_or_else(|| advanced_resource("voice model does not exist"))?;
+                if record.provider != PROVIDER || record.model != MODEL {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                        "voice model provider metadata is not supported by this build",
+                    ));
+                }
+                if record.revoked {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::ConsentRequired,
+                        "revoked voice models cannot generate audio",
+                    ));
+                }
+                if record.consent_id != args.consent_id {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::ConsentRequired,
+                        "consentId does not match the enrolled voice record",
+                    ));
+                }
+                let prompt = args
+                    .prompt
+                    .as_deref()
+                    .map(str::trim)
+                    .filter(|value| !value.is_empty() && value.len() <= 20_000)
+                    .ok_or_else(|| advanced_invalid("prompt is required and too long"))?;
+                let request_hash = canonical_request_hash(&json!({
+                    "provider": PROVIDER,
+                    "model": MODEL,
+                    "consentId": record.consent_id,
+                    "voiceId": record.id,
+                    "voiceRequestHash": record.request_hash,
+                    "prompt": prompt,
+                }))?;
+                let media_dir = project_dir.join(opentake_project::layout::MEDIA_DIR);
+                std::fs::create_dir_all(&media_dir)
+                    .map_err(|_| advanced_execution("project media directory is unavailable"))?;
+                let destination =
+                    media_dir.join(format!("cloned-voice-{}.mp3", uuid::Uuid::new_v4()));
+                let output = self.voice_provider.generate(
+                    &VoiceGenerationRequest {
+                        provider_voice_id: record.provider_voice_id.clone(),
+                        model: MODEL.into(),
+                        prompt: prompt.to_string(),
+                        destination: destination.clone(),
+                    },
+                    cancel,
+                )?;
+                if cancel.checkpoint() {
+                    let _ = std::fs::remove_file(&destination);
+                    return Err(cancelled_workflow("voice generation cancelled"));
+                }
+                let output_probe = probe(&destination).map_err(|error| {
+                    let _ = std::fs::remove_file(&destination);
+                    media_workflow_error(error)
+                })?;
+                if output_probe.has_video
+                    || !output_probe.has_audio
+                    || output_probe.duration_secs <= 0.0
+                {
+                    let _ = std::fs::remove_file(&destination);
+                    return Err(advanced_execution(
+                        "voice provider output must be non-empty audio",
+                    ));
+                }
+                let fps = snapshot.timeline.fps.max(1) as f64;
+                let duration_frames = (output_probe.duration_secs * fps).round().max(1.0) as i32;
+                let provenance = GenerationInput {
+                    prompt: prompt.to_string(),
+                    model: MODEL.into(),
+                    duration: output_probe.duration_secs.round() as i32,
+                    aspect_ratio: "audio".into(),
+                    voice: Some(record.id.clone()),
+                    reference_audio_urls: Some(vec![format!(
+                        "sha256:{}",
+                        record.source_audio_sha256
+                    )]),
+                    reference_audio_asset_ids: Some(vec![record.source_audio_asset_id.clone()]),
+                    source_asset_id: Some(record.source_audio_asset_id.clone()),
+                    provider: Some(PROVIDER.into()),
+                    provider_job_id: Some(output.request_id.clone()),
+                    status: Some(GenerationJobStatus::Ready),
+                    progress: Some(1.0),
+                    consent_id: Some(record.consent_id.clone()),
+                    request_hash: Some(request_hash.clone()),
+                    ..GenerationInput::default()
+                };
+                let probed = ProbedMedia {
+                    duration_secs: output_probe.duration_secs,
+                    width: None,
+                    height: None,
+                    fps: None,
+                    has_audio: true,
+                    color: None,
+                };
+                let committed = self
+                    .core
+                    .commit_generated_media_for_project(
+                        snapshot.project_epoch,
+                        snapshot.version,
+                        &project_dir,
+                        &destination,
+                        format!("{} voice", record.voice_name),
+                        opentake_domain::ClipType::Audio,
+                        &probed,
+                        provenance,
+                        MotionPlacement::Add {
+                            start_frame: snapshot.timeline.total_frames(),
+                            duration_frames,
+                            track_index: None,
+                        },
+                        "Generate Cloned Voice",
+                    )
+                    .map_err(|error| {
+                        let _ = std::fs::remove_file(&destination);
+                        advanced_execution(error.to_string())
+                    })?;
+                Ok(AdvancedWorkflowCommit {
+                    result: json!({
+                        "action": "generate",
+                        "voiceId": record.id,
+                        "assetId": committed.media.id,
+                        "clipIds": committed.edit.affected_clip_ids,
+                        "previewPath": destination,
+                        "provider": PROVIDER,
+                        "model": MODEL,
+                        "providerRequestId": output.request_id,
+                        "requestHash": request_hash,
+                        "consentId": record.consent_id,
+                        "durationFrames": duration_frames,
+                        "mediaType": output.media_type,
+                        "imported": true
+                    }),
+                    action_name: Some(committed.edit.action_name),
+                })
+            }
+            "revoke" => {
+                let voice_id = args
+                    .voice_id
+                    .as_deref()
+                    .ok_or_else(|| advanced_invalid("voiceId is required for revocation"))?;
+                let record = snapshot
+                    .timeline
+                    .voice_models
+                    .iter()
+                    .find(|record| record.id == voice_id)
+                    .cloned()
+                    .ok_or_else(|| advanced_resource("voice model does not exist"))?;
+                if record.provider != PROVIDER || record.model != MODEL {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::CapabilityUnavailable,
+                        "voice model provider metadata is not supported by this build",
+                    ));
+                }
+                if record.consent_id != args.consent_id {
+                    return Err(AdvancedWorkflowError::new(
+                        AdvancedWorkflowErrorKind::ConsentRequired,
+                        "consentId does not match the enrolled voice record",
+                    ));
+                }
+                if !record.revoked {
+                    self.voice_provider
+                        .revoke(&record.provider_voice_id, cancel)?;
+                    let current = self.core.runtime_snapshot();
+                    if current.project_epoch != snapshot.project_epoch {
+                        return Err(advanced_execution(
+                            "project changed while revoking the provider voice",
+                        ));
+                    }
+                    let edit = self
+                        .core
+                        .apply_at_revision_persisted(
+                            ProjectRevision {
+                                project_epoch: current.project_epoch,
+                                version: current.version,
+                            },
+                            EditCommand::RevokeVoiceModel {
+                                voice_model_id: record.id.clone(),
+                            },
+                        )
+                        .map_err(|error| advanced_execution(error.to_string()))?;
+                    return Ok(AdvancedWorkflowCommit {
+                        result: json!({
+                            "action": "revoke",
+                            "voiceId": record.id,
+                            "provider": PROVIDER,
+                            "consentId": record.consent_id,
+                            "revoked": true
+                        }),
+                        action_name: edit.changed.then_some(edit.action_name),
+                    });
+                }
+                Ok(AdvancedWorkflowCommit {
+                    result: json!({
+                        "action": "revoke",
+                        "voiceId": record.id,
+                        "provider": PROVIDER,
+                        "consentId": record.consent_id,
+                        "revoked": true
+                    }),
+                    action_name: None,
+                })
+            }
+            _ => Err(advanced_invalid(
+                "voice action must be enroll, generate, or revoke",
+            )),
+        }
+    }
+}
+
+impl AdvancedWorkflowBridge for TauriAdvancedWorkflowBridge {
+    fn supported_tools(&self) -> Vec<ToolName> {
+        let mut tools = vec![
+            ToolName::TrackMotion,
+            ToolName::RemoveObject,
+            ToolName::MatchColor,
+            ToolName::SeparateStems,
+            ToolName::TranslateCaptions,
+            ToolName::ScriptToVideo,
+            ToolName::GenerateAvatar,
+            ToolName::CloneVoice,
+        ];
+        if verify_rvm_model(&self.models_dir).is_ok() {
+            tools.push(ToolName::GenerateMatte);
+        }
+        tools
+    }
+
+    fn execute(
+        &self,
+        request: AdvancedWorkflowRequest,
+        cancel: &MediaCancelToken,
+    ) -> Result<AdvancedWorkflowCommit, AdvancedWorkflowError> {
+        match request {
+            AdvancedWorkflowRequest::TrackMotion(args) => self.track_motion(args, cancel),
+            AdvancedWorkflowRequest::GenerateMatte(args) => self.generate_matte(args, cancel),
+            AdvancedWorkflowRequest::RemoveObject(args) => self.remove_object(args, cancel),
+            AdvancedWorkflowRequest::MatchColor(args) => self.match_color(args, cancel),
+            AdvancedWorkflowRequest::SeparateStems(args) => self.separate_stems(args, cancel),
+            AdvancedWorkflowRequest::TranslateCaptions(args) => {
+                self.translate_captions(args, cancel)
+            }
+            AdvancedWorkflowRequest::ScriptToVideo(args) => self.script_to_video(args, cancel),
+            AdvancedWorkflowRequest::GenerateAvatar(args) => self.generate_avatar(args, cancel),
+            AdvancedWorkflowRequest::CloneVoice(args) => self.clone_voice(args, cancel),
+        }
+    }
+}
+
+fn position_keyframes(
+    clip: &opentake_domain::Clip,
+    tracked: &RegionMotionTrack,
+) -> Vec<Keyframe<AnimPair>> {
+    tracked
+        .samples
+        .iter()
+        .map(|sample| {
+            let absolute_frame = clip.start_frame + sample.frame;
+            let base = clip.transform_at(absolute_frame);
+            Keyframe::with_interpolation(
+                sample.frame,
+                AnimPair::new(
+                    base.center_x + sample.translation_x,
+                    base.center_y + sample.translation_y,
+                ),
+                Interpolation::Linear,
+            )
+        })
+        .collect()
+}
+
+fn advanced_invalid(message: impl Into<String>) -> AdvancedWorkflowError {
+    AdvancedWorkflowError::new(AdvancedWorkflowErrorKind::InvalidArguments, message)
+}
+
+fn validate_consent_id(value: &str) -> Result<(), AdvancedWorkflowError> {
+    if value.len() < 8
+        || value.len() > 256
+        || !value
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || b"-_.:".contains(&byte))
+    {
+        return Err(AdvancedWorkflowError::new(
+            AdvancedWorkflowErrorKind::ConsentRequired,
+            "record explicit consent and provide its 8-256 character consentId",
+        ));
+    }
+    Ok(())
+}
+
+fn canonical_request_hash(value: &serde_json::Value) -> Result<String, AdvancedWorkflowError> {
+    let bytes = serde_json::to_vec(value).map_err(|error| advanced_execution(error.to_string()))?;
+    Ok(format!("{:x}", Sha256::digest(bytes)))
+}
+
+fn advanced_resource(message: impl Into<String>) -> AdvancedWorkflowError {
+    AdvancedWorkflowError::new(AdvancedWorkflowErrorKind::ResourceNotFound, message)
+}
+
+fn advanced_execution(message: impl Into<String>) -> AdvancedWorkflowError {
+    AdvancedWorkflowError::new(AdvancedWorkflowErrorKind::ExecutionFailed, message)
+}
+
+fn cancelled_workflow(message: impl Into<String>) -> AdvancedWorkflowError {
+    AdvancedWorkflowError::new(AdvancedWorkflowErrorKind::Cancelled, message)
+}
+
+fn media_workflow_error(error: MediaError) -> AdvancedWorkflowError {
+    let kind = if matches!(error, MediaError::Cancelled) {
+        AdvancedWorkflowErrorKind::Cancelled
+    } else {
+        AdvancedWorkflowErrorKind::ExecutionFailed
+    };
+    AdvancedWorkflowError::new(kind, error.to_string())
+}
+
+fn parse_mask_index(mask_id: &str) -> Result<usize, AdvancedWorkflowError> {
+    if mask_id == "primary" {
+        return Ok(0);
+    }
+    let numeric = mask_id.strip_prefix("mask-").unwrap_or(mask_id);
+    numeric
+        .parse::<usize>()
+        .map_err(|_| advanced_invalid("maskId must be primary, a zero-based index, or mask-N"))
+}
+
+fn decode_color_sample(
+    path: &Path,
+    time: f64,
+    is_image: bool,
+    request: &FrameRequest,
+    cancel: &MediaCancelToken,
+) -> Result<RgbaFrame, AdvancedWorkflowError> {
+    if cancel.checkpoint() {
+        return Err(cancelled_workflow("color match cancelled"));
+    }
+    if is_image {
+        return opentake_media::thumbnail::image_thumbnail(path, 640).map_err(media_workflow_error);
+    }
+    let decoded = decode_frames_at_cancellable(path, &[time], request, cancel)
+        .into_iter()
+        .next()
+        .ok_or_else(|| advanced_execution("color sample decoder returned no frame"))?
+        .map_err(media_workflow_error)?;
+    Ok(decoded.1)
+}
+
+fn mean_linear_rgb(frame: &RgbaFrame) -> Result<Rgb, AdvancedWorkflowError> {
+    let mut sum = [0.0_f64; 3];
+    let mut weight = 0.0_f64;
+    for pixel in frame.rgba.chunks_exact(4) {
+        let alpha = f64::from(pixel[3]) / 255.0;
+        if alpha <= 0.01 {
+            continue;
+        }
+        sum[0] += bt709_to_linear(f64::from(pixel[0]) / 255.0) * alpha;
+        sum[1] += bt709_to_linear(f64::from(pixel[1]) / 255.0) * alpha;
+        sum[2] += bt709_to_linear(f64::from(pixel[2]) / 255.0) * alpha;
+        weight += alpha;
+    }
+    if weight <= f64::EPSILON {
+        return Err(AdvancedWorkflowError::new(
+            AdvancedWorkflowErrorKind::AnalysisLowConfidence,
+            "color sample contains no visible pixels",
+        ));
+    }
+    Ok(Rgb::new(sum[0] / weight, sum[1] / weight, sum[2] / weight))
+}
+
+fn bt709_to_linear(value: f64) -> f64 {
+    if value < 0.081 {
+        value / 4.5
+    } else {
+        ((value + 0.099) / 1.099).powf(1.0 / 0.45)
+    }
+}
+
+fn delta_e76(left: Rgb, right: Rgb) -> f64 {
+    let left = linear_rgb_to_lab(left);
+    let right = linear_rgb_to_lab(right);
+    ((left[0] - right[0]).powi(2) + (left[1] - right[1]).powi(2) + (left[2] - right[2]).powi(2))
+        .sqrt()
+}
+
+fn linear_rgb_to_lab(rgb: Rgb) -> [f64; 3] {
+    let x = (0.412_456_4 * rgb.r + 0.357_576_1 * rgb.g + 0.180_437_5 * rgb.b) / 0.950_47;
+    let y = 0.212_672_9 * rgb.r + 0.715_152_2 * rgb.g + 0.072_175 * rgb.b;
+    let z = (0.019_333_9 * rgb.r + 0.119_192 * rgb.g + 0.950_304_1 * rgb.b) / 1.088_83;
+    fn pivot(value: f64) -> f64 {
+        const EPSILON: f64 = 216.0 / 24_389.0;
+        const KAPPA: f64 = 24_389.0 / 27.0;
+        if value > EPSILON {
+            value.cbrt()
+        } else {
+            (KAPPA * value + 16.0) / 116.0
+        }
+    }
+    let fx = pivot(x);
+    let fy = pivot(y);
+    let fz = pivot(z);
+    [116.0 * fy - 16.0, 500.0 * (fx - fy), 200.0 * (fy - fz)]
+}
+
+#[allow(clippy::too_many_arguments)]
+fn materialize_object_removal_video(
+    source: &Path,
+    cache_path: &Path,
+    clip: &opentake_domain::Clip,
+    timeline_fps: i32,
+    removal_start: i32,
+    removal_end: i32,
+    mask: &Mask,
+    cancel: &MediaCancelToken,
+) -> Result<(), AdvancedWorkflowError> {
+    if cancel.checkpoint() {
+        return Err(cancelled_workflow("object removal cancelled"));
+    }
+    let cache_dir = cache_path
+        .parent()
+        .ok_or_else(|| advanced_execution("object-removal cache path has no parent"))?;
+    let metadata = std::fs::symlink_metadata(cache_dir)
+        .map_err(|error| advanced_execution(error.to_string()))?;
+    if !metadata.is_dir() || metadata.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "object-removal cache directory must be a regular directory",
+        ));
+    }
+    let source_probe = probe(source).map_err(media_workflow_error)?;
+    let source_start = i64::from(clip.trim_start_frame);
+    let source_end = source_start + i64::from(clip.duration_frames);
+    let stream = spawn_video_stream(VideoStreamRequest {
+        path: source.to_path_buf(),
+        start_frame: source_start,
+        end_frame: Some(source_end),
+        timeline_fps,
+        max_size: (0, 0),
+        queue_capacity: 8,
+        apply_rotation: true,
+    })
+    .map_err(media_workflow_error)?;
+    let first = match receive_video_frame(&stream, cancel) {
+        Ok(frame) => frame,
+        Err(error) => {
+            let _ = stream.join();
+            return Err(error);
+        }
+    };
+    let width = first.frame.width;
+    let height = first.frame.height;
+    validate_removal_mask(mask, width, height)?;
+    let partial_path = cache_dir.join(format!(
+        ".object-removal-{}.partial.mov",
+        uuid::Uuid::new_v4()
+    ));
+    let preset = ExportPreset::new(VideoCodec::ProRes422, ExportResolution::P1080);
+    let mut encoder = match VideoEncoder::new(&partial_path, width, height, timeline_fps, &preset) {
+        Ok(encoder) => encoder,
+        Err(error) => {
+            let _ = stream.join();
+            let _ = std::fs::remove_file(&partial_path);
+            return Err(media_workflow_error(error));
+        }
+    };
+    let mut encoded_frames = 0_i32;
+    let encode_result = (|| {
+        encode_object_removal_frame(
+            first.frame,
+            encoded_frames,
+            clip,
+            removal_start,
+            removal_end,
+            mask,
+            &mut encoder,
+            cancel,
+        )?;
+        encoded_frames += 1;
+        while encoded_frames < clip.duration_frames {
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("object removal cancelled"));
+            }
+            let next = receive_video_frame(&stream, cancel)?;
+            if next.frame.width != width || next.frame.height != height {
+                return Err(advanced_execution(
+                    "object-removal source dimensions changed during decode",
+                ));
+            }
+            encode_object_removal_frame(
+                next.frame,
+                encoded_frames,
+                clip,
+                removal_start,
+                removal_end,
+                mask,
+                &mut encoder,
+                cancel,
+            )?;
+            encoded_frames += 1;
+        }
+        if source_probe.has_audio {
+            let fps = timeline_fps.max(1) as f64;
+            let audio = extract_pcm_cancellable(
+                source,
+                &PcmSpec {
+                    sample_rate: 48_000,
+                    channels: 1,
+                    format: PcmFormat::F32,
+                },
+                Some((source_start as f64 / fps, source_end as f64 / fps)),
+                cancel,
+            )
+            .map_err(media_workflow_error)?;
+            encoder.push_audio(audio).map_err(media_workflow_error)?;
+        }
+        Ok(())
+    })();
+    stream.request_stop();
+    let _ = stream.join();
+    if let Err(error) = encode_result {
+        encoder.abort();
+        let _ = std::fs::remove_file(&partial_path);
+        return Err(error);
+    }
+    if let Err(error) = encoder.finish_cancellable(cancel, None) {
+        let _ = std::fs::remove_file(&partial_path);
+        return Err(media_workflow_error(error));
+    }
+    match std::fs::hard_link(&partial_path, cache_path) {
+        Ok(()) => {}
+        Err(error) if error.kind() == std::io::ErrorKind::AlreadyExists => {}
+        Err(error) => {
+            let _ = std::fs::remove_file(&partial_path);
+            return Err(advanced_execution(error.to_string()));
+        }
+    }
+    let _ = std::fs::remove_file(&partial_path);
+    let published = std::fs::symlink_metadata(cache_path)
+        .map_err(|error| advanced_execution(error.to_string()))?;
+    if !published.is_file() || published.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "object-removal cache output must be a regular file",
+        ));
+    }
+    Ok(())
+}
+
+fn validate_removal_mask(
+    mask: &Mask,
+    width: u32,
+    height: u32,
+) -> Result<(), AdvancedWorkflowError> {
+    let mut selected = 0_usize;
+    for y in 0..height {
+        for x in 0..width {
+            let coverage = mask.coverage(
+                (f64::from(x) + 0.5) / f64::from(width),
+                (f64::from(y) + 0.5) / f64::from(height),
+            );
+            selected += usize::from(coverage > 0.001);
+        }
+    }
+    let pixels = width as usize * height as usize;
+    if selected == 0 {
+        return Err(advanced_invalid(
+            "the selected mask does not cover any source pixels",
+        ));
+    }
+    if selected == pixels {
+        return Err(advanced_invalid(
+            "the selected mask covers the entire frame; object removal needs surrounding pixels",
+        ));
+    }
+    Ok(())
+}
+
+#[allow(clippy::too_many_arguments)]
+fn encode_object_removal_frame(
+    mut frame: RgbaFrame,
+    output_index: i32,
+    clip: &opentake_domain::Clip,
+    removal_start: i32,
+    removal_end: i32,
+    mask: &Mask,
+    encoder: &mut VideoEncoder,
+    cancel: &MediaCancelToken,
+) -> Result<(), AdvancedWorkflowError> {
+    let project_frame = clip.start_frame + output_index;
+    if (removal_start..removal_end).contains(&project_frame) {
+        inpaint_masked_region(&mut frame, mask, cancel)?;
+    }
+    encoder.push_frame(&frame).map_err(media_workflow_error)
+}
+
+fn inpaint_masked_region(
+    frame: &mut RgbaFrame,
+    mask: &Mask,
+    cancel: &MediaCancelToken,
+) -> Result<(), AdvancedWorkflowError> {
+    validate_removal_mask(mask, frame.width, frame.height)?;
+    let width = frame.width as usize;
+    let height = frame.height as usize;
+    let pixels = width * height;
+    let mut coverage = Vec::with_capacity(pixels);
+    let mut known = Vec::with_capacity(pixels);
+    for y in 0..height {
+        if y % 32 == 0 && cancel.checkpoint() {
+            return Err(cancelled_workflow("object removal cancelled"));
+        }
+        for x in 0..width {
+            let value = mask.coverage(
+                (x as f64 + 0.5) / width as f64,
+                (y as f64 + 0.5) / height as f64,
+            );
+            coverage.push(value);
+            known.push(value <= 0.001);
+        }
+    }
+    let original = frame.rgba.clone();
+    let mut filled = frame.rgba.clone();
+    let mut queued = vec![false; pixels];
+    let mut queue = VecDeque::new();
+    for index in 0..pixels {
+        if !known[index] && has_known_neighbour(index, width, height, &known) {
+            queue.push_back(index);
+            queued[index] = true;
+        }
+    }
+    let mut processed = 0_usize;
+    while let Some(index) = queue.pop_front() {
+        if processed.is_multiple_of(4096) && cancel.checkpoint() {
+            return Err(cancelled_workflow("object removal cancelled"));
+        }
+        let mut sums = [0_u32; 3];
+        let mut count = 0_u32;
+        for neighbour in neighbours(index, width, height).into_iter().flatten() {
+            if known[neighbour] {
+                let offset = neighbour * 4;
+                sums[0] += u32::from(filled[offset]);
+                sums[1] += u32::from(filled[offset + 1]);
+                sums[2] += u32::from(filled[offset + 2]);
+                count += 1;
+            }
+        }
+        if count == 0 {
+            continue;
+        }
+        let offset = index * 4;
+        for channel in 0..3 {
+            filled[offset + channel] = (sums[channel] / count) as u8;
+        }
+        known[index] = true;
+        processed += 1;
+        for neighbour in neighbours(index, width, height).into_iter().flatten() {
+            if !known[neighbour] && !queued[neighbour] {
+                queue.push_back(neighbour);
+                queued[neighbour] = true;
+            }
+        }
+    }
+    if known.iter().any(|value| !value) {
+        return Err(advanced_execution(
+            "object-removal mask could not be filled from its boundary",
+        ));
+    }
+    for (index, alpha) in coverage.into_iter().enumerate() {
+        if alpha <= 0.0 {
+            continue;
+        }
+        let offset = index * 4;
+        for channel in 0..3 {
+            frame.rgba[offset + channel] = (f64::from(original[offset + channel]) * (1.0 - alpha)
+                + f64::from(filled[offset + channel]) * alpha)
+                .round()
+                .clamp(0.0, 255.0) as u8;
+        }
+    }
+    Ok(())
+}
+
+fn has_known_neighbour(index: usize, width: usize, height: usize, known: &[bool]) -> bool {
+    neighbours(index, width, height)
+        .into_iter()
+        .flatten()
+        .any(|neighbour| known[neighbour])
+}
+
+fn neighbours(index: usize, width: usize, height: usize) -> [Option<usize>; 8] {
+    let x = index % width;
+    let y = index / width;
+    let mut result = [None; 8];
+    let mut cursor = 0;
+    for dy in -1_i32..=1 {
+        for dx in -1_i32..=1 {
+            if dx == 0 && dy == 0 {
+                continue;
+            }
+            let nx = x as i32 + dx;
+            let ny = y as i32 + dy;
+            if nx >= 0 && ny >= 0 && nx < width as i32 && ny < height as i32 {
+                result[cursor] = Some(ny as usize * width + nx as usize);
+                cursor += 1;
+            }
+        }
+    }
+    result
+}
+
+#[allow(clippy::too_many_arguments)]
+fn materialize_matte_video(
+    source: &Path,
+    cache_path: &Path,
+    clip: &opentake_domain::Clip,
+    timeline_fps: i32,
+    matte_start: i32,
+    matte_end: i32,
+    models_dir: &Path,
+    cancel: &MediaCancelToken,
+) -> Result<(), AdvancedWorkflowError> {
+    if cancel.checkpoint() {
+        return Err(AdvancedWorkflowError::new(
+            AdvancedWorkflowErrorKind::Cancelled,
+            "matting cancelled",
+        ));
+    }
+    let cache_dir = cache_path
+        .parent()
+        .ok_or_else(|| advanced_execution("matting cache path has no parent"))?;
+    let metadata = std::fs::symlink_metadata(cache_dir)
+        .map_err(|error| advanced_execution(error.to_string()))?;
+    if !metadata.is_dir() || metadata.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "matting cache directory must be a regular directory",
+        ));
+    }
+    let source_probe = probe(source).map_err(media_workflow_error)?;
+    let source_start = i64::from(clip.trim_start_frame);
+    let source_end = source_start + i64::from(clip.duration_frames);
+    let stream = spawn_video_stream(VideoStreamRequest {
+        path: source.to_path_buf(),
+        start_frame: source_start,
+        end_frame: Some(source_end),
+        timeline_fps,
+        max_size: (0, 0),
+        queue_capacity: 8,
+        apply_rotation: true,
+    })
+    .map_err(media_workflow_error)?;
+    let first = match receive_video_frame(&stream, cancel) {
+        Ok(frame) => frame,
+        Err(error) => {
+            let _ = stream.join();
+            return Err(error);
+        }
+    };
+    let width = first.frame.width;
+    let height = first.frame.height;
+    let partial_path = cache_dir.join(format!(".matte-{}.partial.mov", uuid::Uuid::new_v4()));
+    let preset = ExportPreset::new(VideoCodec::ProRes4444, ExportResolution::P1080);
+    let mut encoder = match VideoEncoder::new(&partial_path, width, height, timeline_fps, &preset) {
+        Ok(encoder) => encoder,
+        Err(error) => {
+            let _ = stream.join();
+            let _ = std::fs::remove_file(&partial_path);
+            return Err(media_workflow_error(error));
+        }
+    };
+    let mut session = match RvmMattingSession::load(models_dir) {
+        Ok(session) => session,
+        Err(error) => {
+            encoder.abort();
+            let _ = stream.join();
+            let _ = std::fs::remove_file(&partial_path);
+            return Err(media_workflow_error(error));
+        }
+    };
+    let mut encoded_frames = 0_i32;
+    let encode_result = (|| {
+        encode_matte_frame(
+            first.frame,
+            encoded_frames,
+            clip,
+            matte_start,
+            matte_end,
+            &mut session,
+            &mut encoder,
+            cancel,
+        )?;
+        encoded_frames += 1;
+        while encoded_frames < clip.duration_frames {
+            if cancel.checkpoint() {
+                return Err(AdvancedWorkflowError::new(
+                    AdvancedWorkflowErrorKind::Cancelled,
+                    "matting cancelled",
+                ));
+            }
+            let next = receive_video_frame(&stream, cancel)?;
+            if next.frame.width != width || next.frame.height != height {
+                return Err(advanced_execution(
+                    "matting source dimensions changed during decode",
+                ));
+            }
+            encode_matte_frame(
+                next.frame,
+                encoded_frames,
+                clip,
+                matte_start,
+                matte_end,
+                &mut session,
+                &mut encoder,
+                cancel,
+            )?;
+            encoded_frames += 1;
+        }
+        if source_probe.has_audio {
+            let fps = timeline_fps.max(1) as f64;
+            let audio = extract_pcm_cancellable(
+                source,
+                &PcmSpec {
+                    sample_rate: 48_000,
+                    channels: 1,
+                    format: PcmFormat::F32,
+                },
+                Some((source_start as f64 / fps, source_end as f64 / fps)),
+                cancel,
+            )
+            .map_err(media_workflow_error)?;
+            encoder.push_audio(audio).map_err(media_workflow_error)?;
+        }
+        Ok(())
+    })();
+    stream.request_stop();
+    let _ = stream.join();
+    if let Err(error) = encode_result {
+        encoder.abort();
+        let _ = std::fs::remove_file(&partial_path);
+        return Err(error);
+    }
+    if let Err(error) = encoder.finish_cancellable(cancel, None) {
+        let _ = std::fs::remove_file(&partial_path);
+        return Err(media_workflow_error(error));
+    }
+    match std::fs::hard_link(&partial_path, cache_path) {
+        Ok(()) => {}
+        Err(error) if error.kind() == std::io::ErrorKind::AlreadyExists => {}
+        Err(error) => {
+            let _ = std::fs::remove_file(&partial_path);
+            return Err(advanced_execution(error.to_string()));
+        }
+    }
+    let _ = std::fs::remove_file(&partial_path);
+    let published = std::fs::symlink_metadata(cache_path)
+        .map_err(|error| advanced_execution(error.to_string()))?;
+    if !published.is_file() || published.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "matting cache output must be a regular file",
+        ));
+    }
+    Ok(())
+}
+
+fn receive_video_frame(
+    stream: &VideoStream,
+    cancel: &MediaCancelToken,
+) -> Result<StreamVideoFrame, AdvancedWorkflowError> {
+    loop {
+        if cancel.checkpoint() {
+            return Err(cancelled_workflow("advanced video workflow cancelled"));
+        }
+        match stream
+            .receiver()
+            .recv_timeout(std::time::Duration::from_millis(50))
+        {
+            Ok(frame) => return frame.map_err(media_workflow_error),
+            Err(std::sync::mpsc::RecvTimeoutError::Timeout) => {}
+            Err(std::sync::mpsc::RecvTimeoutError::Disconnected) => {
+                return Err(advanced_execution(
+                    "advanced video source ended before the clip",
+                ));
+            }
+        }
+    }
+}
+
+#[allow(clippy::too_many_arguments)]
+fn encode_matte_frame(
+    mut frame: RgbaFrame,
+    output_index: i32,
+    clip: &opentake_domain::Clip,
+    matte_start: i32,
+    matte_end: i32,
+    session: &mut RvmMattingSession,
+    encoder: &mut VideoEncoder,
+    cancel: &MediaCancelToken,
+) -> Result<(), AdvancedWorkflowError> {
+    let project_frame = clip.start_frame + output_index;
+    if (matte_start..matte_end).contains(&project_frame) {
+        let matte = session
+            .infer(&frame, cancel)
+            .map_err(media_workflow_error)?;
+        let mut rgba = Vec::with_capacity(matte.alpha.len() * 4);
+        for (rgb, alpha) in matte.foreground_rgb.chunks_exact(3).zip(matte.alpha) {
+            rgba.extend_from_slice(rgb);
+            rgba.push(alpha);
+        }
+        frame = RgbaFrame::new(frame.width, frame.height, rgba);
+    } else {
+        for pixel in frame.rgba.chunks_exact_mut(4) {
+            pixel[3] = 255;
+        }
+    }
+    encoder.push_frame(&frame).map_err(media_workflow_error)
+}
+
+fn open_verified_regular_file(path: &Path) -> Result<std::fs::File, AdvancedWorkflowError> {
+    let before =
+        std::fs::symlink_metadata(path).map_err(|error| advanced_execution(error.to_string()))?;
+    if !before.is_file() || before.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "advanced workflow cache must be a regular file",
+        ));
+    }
+    let file = std::fs::File::open(path).map_err(|error| advanced_execution(error.to_string()))?;
+    let after =
+        std::fs::symlink_metadata(path).map_err(|error| advanced_execution(error.to_string()))?;
+    if !after.is_file() || after.file_type().is_symlink() {
+        return Err(advanced_execution(
+            "advanced workflow cache identity changed",
+        ));
+    }
+    let opened = Handle::from_file(
+        file.try_clone()
+            .map_err(|error| advanced_execution(error.to_string()))?,
+    )
+    .map_err(|error| advanced_execution(error.to_string()))?;
+    let current = Handle::from_path(path).map_err(|error| advanced_execution(error.to_string()))?;
+    if opened != current {
+        return Err(advanced_execution(
+            "advanced workflow cache identity changed",
+        ));
+    }
+    Ok(file)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use opentake_core::{PreparedMediaImportOp, ProbedMedia};
+    use opentake_domain::{Clip, ClipType, MaskShape, Point2};
+    use opentake_media::analysis::StabilizationMotionSample;
+    use opentake_ops::ClipEntry;
+    use std::collections::HashSet;
+    use std::process::Command;
+
+    #[test]
+    fn provider_resource_ids_are_safe_path_segments() {
+        assert!(valid_provider_resource_id("abc-123_DEF"));
+        assert!(!valid_provider_resource_id(""));
+        assert!(!valid_provider_resource_id("../voices"));
+        assert!(!valid_provider_resource_id("voice/id"));
+        assert!(!valid_provider_resource_id(&"a".repeat(257)));
+    }
+
+    struct FixtureAvatarProvider {
+        fixture: PathBuf,
+        fail: bool,
+        calls: Arc<Mutex<usize>>,
+    }
+
+    impl AvatarProvider for FixtureAvatarProvider {
+        fn generate(
+            &self,
+            request: &AvatarProviderRequest,
+            cancel: &MediaCancelToken,
+        ) -> Result<AvatarProviderOutput, AdvancedWorkflowError> {
+            *self.calls.lock().unwrap() += 1;
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("fixture avatar cancelled"));
+            }
+            if self.fail {
+                return Err(advanced_execution("fixture avatar provider failed"));
+            }
+            std::fs::copy(&self.fixture, &request.destination)
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            Ok(AvatarProviderOutput {
+                request_id: "avatar-request-fixture".into(),
+                media_type: "video/mp4".into(),
+            })
+        }
+    }
+
+    struct FixtureVoiceProvider {
+        fixture: PathBuf,
+        fail_generation: bool,
+        revoked: Arc<Mutex<HashSet<String>>>,
+        calls: Arc<Mutex<Vec<String>>>,
+    }
+
+    impl VoiceCloneProvider for FixtureVoiceProvider {
+        fn enroll(
+            &self,
+            _request: &VoiceEnrollmentRequest,
+            cancel: &MediaCancelToken,
+        ) -> Result<String, AdvancedWorkflowError> {
+            self.calls.lock().unwrap().push("enroll".into());
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("fixture voice enrollment cancelled"));
+            }
+            Ok("provider-voice-fixture".into())
+        }
+
+        fn generate(
+            &self,
+            request: &VoiceGenerationRequest,
+            cancel: &MediaCancelToken,
+        ) -> Result<VoiceProviderOutput, AdvancedWorkflowError> {
+            self.calls.lock().unwrap().push("generate".into());
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("fixture voice generation cancelled"));
+            }
+            if self.fail_generation {
+                return Err(advanced_execution("fixture voice provider failed"));
+            }
+            if self
+                .revoked
+                .lock()
+                .unwrap()
+                .contains(&request.provider_voice_id)
+            {
+                return Err(advanced_execution("fixture voice was revoked"));
+            }
+            std::fs::copy(&self.fixture, &request.destination)
+                .map_err(|error| advanced_execution(error.to_string()))?;
+            Ok(VoiceProviderOutput {
+                request_id: "voice-request-fixture".into(),
+                media_type: "audio/mpeg".into(),
+            })
+        }
+
+        fn revoke(
+            &self,
+            provider_voice_id: &str,
+            cancel: &MediaCancelToken,
+        ) -> Result<(), AdvancedWorkflowError> {
+            self.calls.lock().unwrap().push("revoke".into());
+            if cancel.checkpoint() {
+                return Err(cancelled_workflow("fixture voice revocation cancelled"));
+            }
+            self.revoked
+                .lock()
+                .unwrap()
+                .insert(provider_voice_id.to_string());
+            Ok(())
+        }
+    }
+
+    #[test]
+    fn tracked_motion_becomes_editable_linear_position_keyframes() {
+        let mut clip = Clip::new("clip", "asset", 100, 30);
+        clip.transform.center_x = 0.4;
+        clip.transform.center_y = 0.6;
+        let keyframes = position_keyframes(
+            &clip,
+            &RegionMotionTrack {
+                samples: vec![
+                    StabilizationMotionSample {
+                        frame: 0,
+                        translation_x: 0.0,
+                        translation_y: 0.0,
+                        rotation_degrees: 0.0,
+                    },
+                    StabilizationMotionSample {
+                        frame: 10,
+                        translation_x: 0.1,
+                        translation_y: -0.05,
+                        rotation_degrees: 0.0,
+                    },
+                ],
+                minimum_confidence: 0.9,
+            },
+        );
+        assert_eq!(keyframes.len(), 2);
+        assert_eq!(keyframes[1].frame, 10);
+        assert!((keyframes[1].value.a - 0.5).abs() < 1e-9);
+        assert!((keyframes[1].value.b - 0.55).abs() < 1e-9);
+        assert_eq!(keyframes[1].interpolation_out, Interpolation::Linear);
+    }
+
+    #[test]
+    fn boundary_fill_removes_masked_pixels_and_preserves_unmasked_pixels() {
+        let mut rgba = Vec::new();
+        for y in 0..12_u8 {
+            for x in 0..16_u8 {
+                if (5..11).contains(&x) && (4..8).contains(&y) {
+                    rgba.extend_from_slice(&[240, 10, 10, 255]);
+                } else {
+                    rgba.extend_from_slice(&[30, 90, 140, 255]);
+                }
+            }
+        }
+        let mut frame = RgbaFrame::new(16, 12, rgba);
+        let before = frame.rgba.clone();
+        let mask = Mask {
+            shape: MaskShape::Circle {
+                center: Point2::new(0.5, 0.5),
+                radius: Point2::new(0.22, 0.22),
+            },
+            ..Mask::default()
+        };
+
+        inpaint_masked_region(&mut frame, &mask, &MediaCancelToken::new()).unwrap();
+
+        let center = (6 * 16 + 8) * 4;
+        assert!(frame.rgba[center] < 80);
+        assert!(frame.rgba[center + 1] > 70);
+        assert!(frame.rgba[center + 2] > 110);
+        assert_eq!(&frame.rgba[0..4], &before[0..4]);
+        assert_eq!(frame.rgba[center + 3], 255);
+    }
+
+    #[test]
+    fn cie_delta_e_is_zero_for_identical_linear_samples() {
+        let sample = Rgb::new(0.2, 0.35, 0.5);
+        assert!(delta_e76(sample, sample) < 1e-12);
+    }
+
+    #[test]
+    fn real_video_tracking_preview_apply_and_undo() {
+        if !opentake_media::ffmpeg_status::ffmpeg_available() {
+            eprintln!("SKIP: ffmpeg unavailable");
+            return;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let frames_dir = root.path().join("frames");
+        std::fs::create_dir(&frames_dir).unwrap();
+        for frame_index in 0..12_u32 {
+            let mut image = image::RgbaImage::from_pixel(96, 72, image::Rgba([8, 8, 8, 255]));
+            let offset_x = 20 + frame_index;
+            let offset_y = 24 + frame_index / 2;
+            for y in offset_y..offset_y + 20 {
+                for x in offset_x..offset_x + 24 {
+                    let local_x = x - offset_x;
+                    let local_y = y - offset_y;
+                    image.put_pixel(
+                        x,
+                        y,
+                        image::Rgba([
+                            (local_x * 9 + local_y * 3) as u8,
+                            (local_x * 2 + local_y * 11) as u8,
+                            (local_x * 7 + local_y * 5) as u8,
+                            255,
+                        ]),
+                    );
+                }
+            }
+            image
+                .save(frames_dir.join(format!("frame-{frame_index:03}.png")))
+                .unwrap();
+        }
+        let source = root.path().join("moving-subject.mp4");
+        let status = Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-framerate",
+                "10",
+            ])
+            .arg("-i")
+            .arg(frames_dir.join("frame-%03d.png"))
+            .args(["-c:v", "libx264", "-pix_fmt", "yuv420p"])
+            .arg(&source)
+            .status()
+            .unwrap();
+        assert!(status.success());
+
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 10,
+            width: 96,
+            height: 72,
+        })
+        .unwrap();
+        let bundle = root.path().join("Tracking.opentake");
+        core.save_project(Some(bundle.clone())).unwrap();
+        let runtime = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                runtime.project_epoch,
+                &bundle,
+                vec![PreparedMediaImportOp::ImportFile {
+                    path: source,
+                    name: "moving-subject.mp4".into(),
+                    probe: ProbedMedia {
+                        duration_secs: 1.2,
+                        width: Some(96),
+                        height: Some(72),
+                        fps: Some(10.0),
+                        has_audio: false,
+                        color: None,
+                    },
+                    folder: None,
+                }],
+            )
+            .unwrap();
+        let asset_id = imported[0].entry.id.clone();
+        let placed = core
+            .apply(EditCommand::AddClipsAutoTrack {
+                entries: vec![ClipEntry {
+                    media_ref: asset_id,
+                    media_type: ClipType::Video,
+                    source_clip_type: ClipType::Video,
+                    track_index: 0,
+                    start_frame: 0,
+                    duration_frames: 12,
+                    trim_start_frame: None,
+                    trim_end_frame: None,
+                    has_audio: false,
+                    add_linked_audio: false,
+                    transform: None,
+                }],
+            })
+            .unwrap();
+        let clip_id = placed.affected_clip_ids[0].clone();
+        let bridge = TauriAdvancedWorkflowBridge::new(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+        );
+        let request = TrackMotionArgs {
+            clip_id: clip_id.clone(),
+            region: json!({
+                "x": 20.0 / 96.0,
+                "y": 24.0 / 72.0,
+                "width": 24.0 / 96.0,
+                "height": 20.0 / 72.0
+            }),
+            start_frame: None,
+            end_frame: None,
+            apply: Some(false),
+        };
+        let preview = bridge
+            .track_motion(request.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert!(preview.action_name.is_none());
+        assert_eq!(preview.result["applied"], false);
+        assert!(preview.result["keyframes"].as_array().unwrap().len() >= 2);
+        assert!(core.runtime_snapshot().timeline.tracks[0].clips[0]
+            .position_track
+            .is_none());
+
+        let applied = bridge
+            .track_motion(
+                TrackMotionArgs {
+                    apply: Some(true),
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.result["applied"], true);
+        assert_eq!(applied.action_name.as_deref(), Some("Set Keyframes"));
+        let after = core.runtime_snapshot();
+        let clip = after.timeline.tracks[0]
+            .clips
+            .iter()
+            .find(|clip| clip.id == clip_id)
+            .unwrap();
+        assert!(clip.position_track.as_ref().unwrap().keyframes.len() >= 2);
+        let tracked_position = clip.position_track.clone();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        let reopened_snapshot = reopened.runtime_snapshot();
+        assert_eq!(
+            reopened_snapshot.timeline.tracks[0].clips[0].position_track,
+            tracked_position
+        );
+
+        let out = root.path().join("tracked-export.mp4");
+        let summary = crate::export::run_export(
+            &after.timeline,
+            &after.media,
+            &after.project_dir,
+            &crate::export::ExportRequest {
+                out_path: out.to_string_lossy().into_owned(),
+                codec: crate::export::ExportCodec::H264,
+                quality: crate::export::ExportQuality::P720,
+            },
+        )
+        .unwrap();
+        assert_eq!(summary.frame_count, 12);
+        assert!(!summary.has_audio);
+        let exported = probe(&out).unwrap();
+        assert!(exported.has_video);
+        assert!(!exported.has_audio);
+        core.undo().unwrap();
+        let undone = core.runtime_snapshot();
+        assert!(undone.timeline.tracks[0].clips[0].position_track.is_none());
+
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .track_motion(
+                TrackMotionArgs {
+                    apply: Some(true),
+                    ..request
+                },
+                &cancelled,
+            )
+            .expect_err("pre-cancelled analysis must fail");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+        assert!(core.runtime_snapshot().timeline.tracks[0].clips[0]
+            .position_track
+            .is_none());
+    }
+
+    #[test]
+    fn official_matting_preview_apply_undo_and_reopen() {
+        let Some(model_source) = std::env::var_os("OPENTAKE_TEST_RVM_MODEL") else {
+            eprintln!("SKIP: OPENTAKE_TEST_RVM_MODEL is not set");
+            return;
+        };
+        if !opentake_media::ffmpeg_status::ffmpeg_available() {
+            eprintln!("SKIP: ffmpeg unavailable");
+            return;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let models_dir = root.path().join("models");
+        let model_destination = opentake_media::analysis::matting_model_path(&models_dir);
+        std::fs::create_dir_all(model_destination.parent().unwrap()).unwrap();
+        std::fs::copy(model_source, model_destination).unwrap();
+
+        let source = root.path().join("matting-source.mp4");
+        let status = Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-f",
+                "lavfi",
+                "-i",
+                "testsrc2=size=64x64:rate=5:duration=0.4",
+                "-f",
+                "lavfi",
+                "-i",
+                "sine=frequency=440:sample_rate=48000:duration=0.4",
+                "-shortest",
+                "-c:v",
+                "libx264",
+                "-pix_fmt",
+                "yuv420p",
+                "-c:a",
+                "aac",
+            ])
+            .arg(&source)
+            .status()
+            .unwrap();
+        assert!(status.success());
+
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 5,
+            width: 64,
+            height: 64,
+        })
+        .unwrap();
+        let bundle = root.path().join("Matting.opentake");
+        core.save_project(Some(bundle.clone())).unwrap();
+        let runtime = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                runtime.project_epoch,
+                &bundle,
+                vec![PreparedMediaImportOp::ImportFile {
+                    path: source,
+                    name: "matting-source.mp4".into(),
+                    probe: ProbedMedia {
+                        duration_secs: 0.4,
+                        width: Some(64),
+                        height: Some(64),
+                        fps: Some(5.0),
+                        has_audio: true,
+                        color: None,
+                    },
+                    folder: None,
+                }],
+            )
+            .unwrap();
+        let source_asset_id = imported[0].entry.id.clone();
+        let placed = core
+            .apply(EditCommand::AddClipsAutoTrack {
+                entries: vec![ClipEntry {
+                    media_ref: source_asset_id.clone(),
+                    media_type: ClipType::Video,
+                    source_clip_type: ClipType::Video,
+                    track_index: 0,
+                    start_frame: 0,
+                    duration_frames: 2,
+                    trim_start_frame: None,
+                    trim_end_frame: None,
+                    has_audio: true,
+                    add_linked_audio: false,
+                    transform: None,
+                }],
+            })
+            .unwrap();
+        let clip_id = placed.affected_clip_ids[0].clone();
+        let bridge =
+            TauriAdvancedWorkflowBridge::new(core.clone(), root.path().join("cache"), models_dir);
+        assert!(bridge.supported_tools().contains(&ToolName::GenerateMatte));
+        let request = GenerateMatteArgs {
+            clip_id: clip_id.clone(),
+            model: None,
+            start_frame: None,
+            end_frame: None,
+            apply: Some(false),
+        };
+        let preview = bridge
+            .generate_matte(request.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(preview.result["applied"], false);
+        assert_eq!(core.media().entries.len(), 1);
+        assert_eq!(
+            core.runtime_snapshot().timeline.tracks[0].clips[0].media_ref,
+            source_asset_id
+        );
+
+        let applied = bridge
+            .generate_matte(
+                GenerateMatteArgs {
+                    apply: Some(true),
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.result["applied"], true);
+        assert_eq!(applied.action_name.as_deref(), Some("Edit Motion Graphic"));
+        let generated_asset_id = applied.result["assetId"].as_str().unwrap().to_string();
+        let generated = core
+            .media()
+            .entries
+            .into_iter()
+            .find(|entry| entry.id == generated_asset_id)
+            .unwrap();
+        assert!(generated.carries_straight_alpha());
+        assert_eq!(generated.has_audio, Some(true));
+        assert_eq!(
+            generated
+                .generation_input
+                .as_ref()
+                .unwrap()
+                .source_asset_id
+                .as_deref(),
+            Some(source_asset_id.as_str())
+        );
+        assert_eq!(
+            core.runtime_snapshot().timeline.tracks[0].clips[0].media_ref,
+            generated_asset_id
+        );
+
+        core.undo().unwrap();
+        assert_eq!(
+            core.runtime_snapshot().timeline.tracks[0].clips[0].media_ref,
+            source_asset_id
+        );
+        core.redo().unwrap();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        let reopened_clip = &reopened.runtime_snapshot().timeline.tracks[0].clips[0];
+        assert_eq!(reopened_clip.id, clip_id);
+        assert_eq!(reopened_clip.media_ref, generated_asset_id);
+        assert!(reopened
+            .media()
+            .entries
+            .iter()
+            .any(|entry| entry.id == source_asset_id));
+
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .generate_matte(request, &cancelled)
+            .expect_err("pre-cancelled matting must fail even when cached");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+    }
+
+    #[test]
+    fn object_removal_preview_range_apply_undo_reopen_and_failure_atomicity() {
+        if !opentake_media::ffmpeg_status::ffmpeg_available() {
+            eprintln!("SKIP: ffmpeg unavailable");
+            return;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let frames_dir = root.path().join("frames");
+        std::fs::create_dir(&frames_dir).unwrap();
+        for frame_index in 0..8_u32 {
+            let mut image = image::RgbaImage::from_pixel(
+                64,
+                48,
+                image::Rgba([30 + frame_index as u8, 90, 140, 255]),
+            );
+            for y in 17..31 {
+                for x in 24..40 {
+                    image.put_pixel(x, y, image::Rgba([240, 12, 12, 255]));
+                }
+            }
+            image
+                .save(frames_dir.join(format!("frame-{frame_index:03}.png")))
+                .unwrap();
+        }
+        let source = root.path().join("object-removal-source.mp4");
+        let status = Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-framerate",
+                "4",
+            ])
+            .arg("-i")
+            .arg(frames_dir.join("frame-%03d.png"))
+            .args([
+                "-f",
+                "lavfi",
+                "-i",
+                "sine=frequency=440:sample_rate=48000:duration=2",
+                "-shortest",
+                "-c:v",
+                "libx264",
+                "-pix_fmt",
+                "yuv420p",
+                "-c:a",
+                "aac",
+            ])
+            .arg(&source)
+            .status()
+            .unwrap();
+        assert!(status.success());
+
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 4,
+            width: 64,
+            height: 48,
+        })
+        .unwrap();
+        let bundle = root.path().join("ObjectRemoval.opentake");
+        core.save_project(Some(bundle.clone())).unwrap();
+        let runtime = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                runtime.project_epoch,
+                &bundle,
+                vec![PreparedMediaImportOp::ImportFile {
+                    path: source,
+                    name: "object-removal-source.mp4".into(),
+                    probe: ProbedMedia {
+                        duration_secs: 2.0,
+                        width: Some(64),
+                        height: Some(48),
+                        fps: Some(4.0),
+                        has_audio: true,
+                        color: None,
+                    },
+                    folder: None,
+                }],
+            )
+            .unwrap();
+        let source_asset_id = imported[0].entry.id.clone();
+        let placed = core
+            .apply(EditCommand::AddClipsAutoTrack {
+                entries: vec![ClipEntry {
+                    media_ref: source_asset_id.clone(),
+                    media_type: ClipType::Video,
+                    source_clip_type: ClipType::Video,
+                    track_index: 0,
+                    start_frame: 0,
+                    duration_frames: 8,
+                    trim_start_frame: None,
+                    trim_end_frame: None,
+                    has_audio: true,
+                    add_linked_audio: false,
+                    transform: None,
+                }],
+            })
+            .unwrap();
+        let clip_id = placed.affected_clip_ids[0].clone();
+        let mask = Mask {
+            shape: MaskShape::Circle {
+                center: Point2::new(0.5, 0.5),
+                radius: Point2::new(0.16, 0.22),
+            },
+            feather: 0.01,
+            ..Mask::default()
+        };
+        core.apply(EditCommand::SetMasks {
+            clip_ids: vec![clip_id.clone()],
+            masks: vec![mask.clone()],
+        })
+        .unwrap();
+        core.save_project(None).unwrap();
+
+        let bridge = TauriAdvancedWorkflowBridge::new(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+        );
+        assert!(bridge.supported_tools().contains(&ToolName::RemoveObject));
+        let request = RemoveObjectArgs {
+            clip_id: clip_id.clone(),
+            mask_id: "primary".into(),
+            start_frame: Some(2),
+            end_frame: Some(6),
+            provider: Some("local".into()),
+            model: Some("opentake-boundary-fill-v1".into()),
+            cost_authorized: None,
+            apply: Some(false),
+        };
+        let before_preview = core.runtime_snapshot();
+        let preview = bridge
+            .remove_object(request.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(preview.result["applied"], false);
+        assert_eq!(core.runtime_snapshot().timeline, before_preview.timeline);
+        assert_eq!(core.runtime_snapshot().media, before_preview.media);
+        let preview_path = PathBuf::from(preview.result["previewPath"].as_str().unwrap());
+        let decoded = decode_frames_at_cancellable(
+            &preview_path,
+            &[0.25, 0.75],
+            &FrameRequest {
+                max_size: (64, 48),
+                tolerance_secs: 0.1,
+                ..FrameRequest::default()
+            },
+            &MediaCancelToken::new(),
+        )
+        .into_iter()
+        .collect::<Result<Vec<_>, _>>()
+        .unwrap();
+        let center = (24 * 64 + 32) * 4;
+        assert!(
+            decoded[0].1.rgba[center] > 180,
+            "outside-range frame changed"
+        );
+        assert!(decoded[1].1.rgba[center] < 120, "masked object remained");
+
+        let before_failure = core.runtime_snapshot();
+        let error = bridge
+            .remove_object(
+                RemoveObjectArgs {
+                    mask_id: "mask-99".into(),
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .expect_err("missing mask must fail");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::ResourceNotFound);
+        let after_failure = core.runtime_snapshot();
+        assert_eq!(after_failure.timeline, before_failure.timeline);
+        assert_eq!(after_failure.media, before_failure.media);
+        assert_eq!(after_failure.version, before_failure.version);
+
+        let applied = bridge
+            .remove_object(
+                RemoveObjectArgs {
+                    apply: Some(true),
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.action_name.as_deref(), Some("Remove Masked Object"));
+        let generated_asset_id = applied.result["assetId"].as_str().unwrap().to_string();
+        let after_apply = core.runtime_snapshot();
+        assert_eq!(after_apply.timeline.tracks[0].clips[0].id, clip_id);
+        assert_eq!(
+            after_apply.timeline.tracks[0].clips[0].media_ref,
+            generated_asset_id
+        );
+        assert!(after_apply.timeline.tracks[0].clips[0].masks.is_empty());
+        let generated = core
+            .media()
+            .entries
+            .into_iter()
+            .find(|entry| entry.id == generated_asset_id)
+            .unwrap();
+        let (applied_path, applied_is_video) =
+            crate::transcribe::resolve_asset_from_snapshot(&after_apply, &generated_asset_id)
+                .unwrap();
+        assert!(applied_is_video);
+        assert_eq!(
+            file_sha256(&applied_path).unwrap(),
+            file_sha256(&preview_path).unwrap(),
+            "Apply must publish the exact reviewed derivative consumed by playback/export"
+        );
+        assert_eq!(generated.has_audio, Some(true));
+        let provenance = generated.generation_input.unwrap();
+        assert_eq!(provenance.provider.as_deref(), Some("opentake-local"));
+        assert_eq!(provenance.model, "opentake-boundary-fill-v1");
+        assert_eq!(
+            provenance.source_asset_id.as_deref(),
+            Some(source_asset_id.as_str())
+        );
+
+        core.undo().unwrap();
+        let undone = core.runtime_snapshot();
+        assert_eq!(
+            undone.timeline.tracks[0].clips[0].media_ref,
+            source_asset_id
+        );
+        assert_eq!(undone.timeline.tracks[0].clips[0].masks, vec![mask]);
+        core.redo().unwrap();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        let reopened_clip = &reopened.runtime_snapshot().timeline.tracks[0].clips[0];
+        assert_eq!(reopened_clip.id, clip_id);
+        assert_eq!(reopened_clip.media_ref, generated_asset_id);
+        assert!(reopened_clip.masks.is_empty());
+        assert!(reopened
+            .media()
+            .entries
+            .iter()
+            .any(|entry| entry.id == source_asset_id));
+
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .remove_object(request, &cancelled)
+            .expect_err("pre-cancelled cached preview must fail");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+    }
+
+    #[test]
+    fn color_match_improves_delta_e_preserves_luma_and_persists_editable_grade() {
+        let root = tempfile::tempdir().unwrap();
+        let target_path = root.path().join("target.png");
+        let reference_path = root.path().join("reference.png");
+        let black_path = root.path().join("black.png");
+        image::RgbaImage::from_pixel(64, 48, image::Rgba([130, 105, 90, 255]))
+            .save(&target_path)
+            .unwrap();
+        image::RgbaImage::from_pixel(64, 48, image::Rgba([95, 120, 145, 255]))
+            .save(&reference_path)
+            .unwrap();
+        image::RgbaImage::from_pixel(64, 48, image::Rgba([0, 0, 0, 255]))
+            .save(&black_path)
+            .unwrap();
+
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 10,
+            width: 64,
+            height: 48,
+        })
+        .unwrap();
+        let bundle = root.path().join("ColorMatch.opentake");
+        core.save_project(Some(bundle.clone())).unwrap();
+        let runtime = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                runtime.project_epoch,
+                &bundle,
+                vec![
+                    PreparedMediaImportOp::ImportFile {
+                        path: target_path,
+                        name: "target.png".into(),
+                        probe: ProbedMedia {
+                            duration_secs: 0.0,
+                            width: Some(64),
+                            height: Some(48),
+                            ..ProbedMedia::default()
+                        },
+                        folder: None,
+                    },
+                    PreparedMediaImportOp::ImportFile {
+                        path: reference_path,
+                        name: "reference.png".into(),
+                        probe: ProbedMedia {
+                            duration_secs: 0.0,
+                            width: Some(64),
+                            height: Some(48),
+                            ..ProbedMedia::default()
+                        },
+                        folder: None,
+                    },
+                    PreparedMediaImportOp::ImportFile {
+                        path: black_path,
+                        name: "black.png".into(),
+                        probe: ProbedMedia {
+                            duration_secs: 0.0,
+                            width: Some(64),
+                            height: Some(48),
+                            ..ProbedMedia::default()
+                        },
+                        folder: None,
+                    },
+                ],
+            )
+            .unwrap();
+        let target_id = imported[0].entry.id.clone();
+        let reference_id = imported[1].entry.id.clone();
+        let black_id = imported[2].entry.id.clone();
+        let placed = core
+            .apply(EditCommand::AddClipsAutoTrack {
+                entries: vec![ClipEntry {
+                    media_ref: target_id,
+                    media_type: ClipType::Image,
+                    source_clip_type: ClipType::Image,
+                    track_index: 0,
+                    start_frame: 10,
+                    duration_frames: 20,
+                    trim_start_frame: None,
+                    trim_end_frame: None,
+                    has_audio: false,
+                    add_linked_audio: false,
+                    transform: None,
+                }],
+            })
+            .unwrap();
+        let clip_id = placed.affected_clip_ids[0].clone();
+        core.save_project(None).unwrap();
+        let bridge = TauriAdvancedWorkflowBridge::new(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+        );
+        assert!(bridge.supported_tools().contains(&ToolName::MatchColor));
+        let request = MatchColorArgs {
+            clip_id: clip_id.clone(),
+            reference_media_ref: reference_id.clone(),
+            reference_frame: Some(0),
+            target_frame: Some(12),
+            apply: Some(false),
+        };
+        let before = core.runtime_snapshot();
+        let preview = bridge
+            .match_color(request.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(preview.result["applied"], false);
+        assert!(preview.result["deltaEAfter"].as_f64().unwrap() < 0.01);
+        assert!(
+            preview.result["deltaEAfter"].as_f64().unwrap()
+                < preview.result["deltaEBefore"].as_f64().unwrap()
+        );
+        assert!(
+            (preview.result["targetLumaAfter"].as_f64().unwrap()
+                - preview.result["targetLumaBefore"].as_f64().unwrap())
+            .abs()
+                < 0.01
+        );
+        assert_eq!(core.runtime_snapshot().timeline, before.timeline);
+
+        let failure_before = core.runtime_snapshot();
+        let error = bridge
+            .match_color(
+                MatchColorArgs {
+                    reference_media_ref: black_id,
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .expect_err("black reference must be refused");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::AnalysisLowConfidence);
+        let failure_after = core.runtime_snapshot();
+        assert_eq!(failure_after.timeline, failure_before.timeline);
+        assert_eq!(failure_after.version, failure_before.version);
+
+        let applied = bridge
+            .match_color(
+                MatchColorArgs {
+                    apply: Some(true),
+                    ..request.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.action_name.as_deref(), Some("Match Color"));
+        let after_apply = core.runtime_snapshot();
+        let matched = &after_apply.timeline.tracks[0].clips[0];
+        assert!(matched.color_grade.is_some());
+        let provenance = matched.color_match_input.as_ref().unwrap();
+        assert_eq!(provenance.reference_media_ref, reference_id);
+        assert_eq!(provenance.reference_frame, 0);
+        assert_eq!(provenance.target_frame, 12);
+        assert!(provenance.delta_e_after < provenance.delta_e_before);
+
+        core.undo().unwrap();
+        let undone = core.runtime_snapshot();
+        assert!(undone.timeline.tracks[0].clips[0].color_grade.is_none());
+        assert!(undone.timeline.tracks[0].clips[0]
+            .color_match_input
+            .is_none());
+        core.redo().unwrap();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        let reopened_clip = &reopened.runtime_snapshot().timeline.tracks[0].clips[0];
+        assert_eq!(reopened_clip.color_grade, matched.color_grade);
+        assert_eq!(reopened_clip.color_match_input, matched.color_match_input);
+
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .match_color(request, &cancelled)
+            .expect_err("pre-cancelled color match must fail");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+    }
+
+    #[test]
+    fn stem_bridge_imports_provenance_aligned_tracks_undo_reopen_and_cancel() {
+        if !opentake_media::ffmpeg_status::ffmpeg_available() {
+            eprintln!("SKIP: ffmpeg unavailable");
+            return;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let source = root.path().join("mixture.wav");
+        let sample_rate = 48_000_u32;
+        let frames = 4_800_usize;
+        let data_len = (frames * 2 * 2) as u32;
+        let mut wav = Vec::with_capacity(44 + data_len as usize);
+        wav.extend_from_slice(b"RIFF");
+        wav.extend_from_slice(&(36 + data_len).to_le_bytes());
+        wav.extend_from_slice(b"WAVEfmt ");
+        wav.extend_from_slice(&16_u32.to_le_bytes());
+        wav.extend_from_slice(&1_u16.to_le_bytes());
+        wav.extend_from_slice(&2_u16.to_le_bytes());
+        wav.extend_from_slice(&sample_rate.to_le_bytes());
+        wav.extend_from_slice(&(sample_rate * 4).to_le_bytes());
+        wav.extend_from_slice(&4_u16.to_le_bytes());
+        wav.extend_from_slice(&16_u16.to_le_bytes());
+        wav.extend_from_slice(b"data");
+        wav.extend_from_slice(&data_len.to_le_bytes());
+        for frame in 0..frames {
+            let time = frame as f32 / sample_rate as f32;
+            let vocal = 0.25 * (std::f32::consts::TAU * 440.0 * time).sin();
+            let music = 0.18 * (std::f32::consts::TAU * 997.0 * time).sin();
+            for sample in [vocal + music, vocal - music] {
+                wav.extend_from_slice(&((sample.clamp(-1.0, 1.0) * 32767.0) as i16).to_le_bytes());
+            }
+        }
+        std::fs::write(&source, wav).unwrap();
+
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 30,
+            width: 64,
+            height: 64,
+        })
+        .unwrap();
+        let bundle = root.path().join("Stems.opentake");
+        core.save_project(Some(bundle.clone())).unwrap();
+        let snapshot = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                snapshot.project_epoch,
+                &bundle,
+                vec![PreparedMediaImportOp::ImportFile {
+                    path: source,
+                    name: "mixture.wav".into(),
+                    probe: ProbedMedia {
+                        duration_secs: 0.1,
+                        has_audio: true,
+                        ..ProbedMedia::default()
+                    },
+                    folder: None,
+                }],
+            )
+            .unwrap();
+        let source_id = imported[0].entry.id.clone();
+        let bridge = TauriAdvancedWorkflowBridge::new(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+        );
+        assert!(bridge.supported_tools().contains(&ToolName::SeparateStems));
+        let request = SeparateStemsArgs {
+            media_ref: source_id.clone(),
+            provider: Some("local".into()),
+            model: Some("opentake-center-v1".into()),
+            import_to_tracks: Some(true),
+            start_frame: Some(45),
+        };
+        let separated = bridge
+            .separate_stems(request.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(
+            separated.action_name.as_deref(),
+            Some("Import Stems To Tracks")
+        );
+        assert_eq!(separated.result["importedToTracks"], true);
+        assert_eq!(separated.result["clipIds"].as_array().unwrap().len(), 2);
+        let after = core.runtime_snapshot();
+        assert_eq!(after.media.entries.len(), 3);
+        assert_eq!(after.timeline.tracks.len(), 2);
+        assert!(after.timeline.tracks.iter().all(|track| {
+            track.kind == ClipType::Audio
+                && track.clips.len() == 1
+                && track.clips[0].start_frame == 45
+                && track.clips[0].duration_frames == 3
+        }));
+        for stem in &after.media.entries[1..] {
+            let provenance = stem.generation_input.as_ref().unwrap();
+            assert_eq!(
+                provenance.source_asset_id.as_deref(),
+                Some(source_id.as_str())
+            );
+            assert_eq!(provenance.provider.as_deref(), Some("local"));
+            assert_eq!(provenance.model, "opentake-center-v1");
+        }
+
+        core.undo().unwrap();
+        assert!(core.runtime_snapshot().timeline.tracks.is_empty());
+        assert_eq!(core.media().entries.len(), 3);
+        core.redo().unwrap();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        assert_eq!(reopened.runtime_snapshot().timeline.tracks.len(), 2);
+        assert_eq!(reopened.media().entries.len(), 3);
+
+        let before_cancel = core.runtime_snapshot();
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .separate_stems(request, &cancelled)
+            .expect_err("pre-cancelled separation must fail");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+        let after_cancel = core.runtime_snapshot();
+        assert_eq!(after_cancel.timeline, before_cancel.timeline);
+        assert_eq!(after_cancel.media, before_cancel.media);
+    }
+
+    #[derive(Clone)]
+    struct MockCaptionTranslator {
+        result: Result<CaptionTranslationProviderResult, AdvancedWorkflowError>,
+    }
+
+    impl CaptionTranslationProvider for MockCaptionTranslator {
+        fn translate(
+            &self,
+            _provider: &str,
+            _model: &str,
+            _source_locale: &str,
+            _target_locale: &str,
+            _captions: &[CaptionTranslationDraft],
+            _cancel: &MediaCancelToken,
+        ) -> Result<CaptionTranslationProviderResult, AdvancedWorkflowError> {
+            self.result.clone()
+        }
+    }
+
+    fn caption_translation_fixture() -> (AppCore, Vec<String>) {
+        let core = AppCore::new();
+        let placed = core
+            .apply(EditCommand::AddCaptions {
+                entries: [(4, 12, "Hello"), (21, 15, "World")]
+                    .into_iter()
+                    .map(
+                        |(start_frame, duration_frames, content)| opentake_ops::CaptionEntry {
+                            start_frame,
+                            duration_frames,
+                            content: content.into(),
+                            text_style: opentake_domain::TextStyle::default(),
+                            transform: opentake_domain::Transform::default(),
+                            caption_group_id: "captions-1".into(),
+                        },
+                    )
+                    .collect(),
+            })
+            .unwrap();
+        (core, placed.affected_clip_ids)
+    }
+
+    fn translation_args(ids: Vec<String>, apply: bool) -> TranslateCaptionsArgs {
+        TranslateCaptionsArgs {
+            caption_clip_ids: ids,
+            source_locale: Some("en-US".into()),
+            target_locale: "zh-CN".into(),
+            provider: Some("openai".into()),
+            model: Some("mock-v1".into()),
+            cost_authorized: Some(true),
+            apply: Some(apply),
+        }
+    }
+
+    #[test]
+    fn caption_translation_mock_success_preserves_timing_undo_and_reopen() {
+        let root = tempfile::tempdir().unwrap();
+        let bundle = root.path().join("CaptionTranslation.opentake");
+        let (core, ids) = caption_translation_fixture();
+        core.save_project(Some(bundle.clone())).unwrap();
+        let before = core.runtime_snapshot();
+        let translator = MockCaptionTranslator {
+            result: Ok(CaptionTranslationProviderResult {
+                translations: vec![
+                    CaptionTranslationDraft {
+                        id: ids[0].clone(),
+                        text: "你好".into(),
+                    },
+                    CaptionTranslationDraft {
+                        id: ids[1].clone(),
+                        text: "世界".into(),
+                    },
+                ],
+                errors: vec![],
+            }),
+        };
+        let bridge = TauriAdvancedWorkflowBridge::with_caption_translator(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+            Arc::new(translator),
+        );
+        assert!(bridge
+            .supported_tools()
+            .contains(&ToolName::TranslateCaptions));
+        let preview = bridge
+            .translate_captions(
+                translation_args(ids.clone(), false),
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(preview.result["translatedCount"], 2);
+        assert_eq!(core.runtime_snapshot().timeline, before.timeline);
+        let applied = bridge
+            .translate_captions(
+                translation_args(ids.clone(), true),
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.action_name.as_deref(), Some("Translate Captions"));
+        let after = core.runtime_snapshot();
+        for (index, clip) in after.timeline.tracks[0].clips.iter().enumerate() {
+            let original = &before.timeline.tracks[0].clips[index];
+            assert_eq!(clip.id, original.id);
+            assert_eq!(clip.start_frame, original.start_frame);
+            assert_eq!(clip.duration_frames, original.duration_frames);
+            assert_eq!(clip.caption_group_id, original.caption_group_id);
+            let provenance = clip.caption_translation_input.as_ref().unwrap();
+            assert_eq!(provenance.source_locale, "en-US");
+            assert_eq!(provenance.target_locale, "zh-CN");
+        }
+        core.undo().unwrap();
+        assert_eq!(core.runtime_snapshot().timeline, before.timeline);
+        core.redo().unwrap();
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        assert_eq!(
+            reopened.runtime_snapshot().timeline,
+            core.runtime_snapshot().timeline
+        );
+    }
+
+    #[test]
+    fn caption_translation_mock_partial_and_failure_keep_failed_text_untouched() {
+        let root = tempfile::tempdir().unwrap();
+        let (core, ids) = caption_translation_fixture();
+        let before = core.runtime_snapshot();
+        let partial = TauriAdvancedWorkflowBridge::with_caption_translator(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+            Arc::new(MockCaptionTranslator {
+                result: Ok(CaptionTranslationProviderResult {
+                    translations: vec![CaptionTranslationDraft {
+                        id: ids[0].clone(),
+                        text: "Bonjour".into(),
+                    }],
+                    errors: vec![CaptionTranslationFailure {
+                        id: ids[1].clone(),
+                        message: "temporary refusal".into(),
+                    }],
+                }),
+            }),
+        );
+        let result = partial
+            .translate_captions(
+                translation_args(ids.clone(), true),
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(result.result["translatedCount"], 1);
+        assert_eq!(result.result["errors"].as_array().unwrap().len(), 1);
+        let after_partial = core.runtime_snapshot();
+        assert_eq!(
+            after_partial.timeline.tracks[0].clips[0]
+                .text_content
+                .as_deref(),
+            Some("Bonjour")
+        );
+        assert_eq!(
+            after_partial.timeline.tracks[0].clips[1]
+                .text_content
+                .as_deref(),
+            Some("World")
+        );
+        core.undo().unwrap();
+        assert_eq!(core.runtime_snapshot().timeline, before.timeline);
+
+        let failed = TauriAdvancedWorkflowBridge::with_caption_translator(
+            core.clone(),
+            root.path().join("cache-2"),
+            root.path().join("models"),
+            Arc::new(MockCaptionTranslator {
+                result: Err(advanced_execution("mock provider failed")),
+            }),
+        );
+        assert!(failed
+            .translate_captions(translation_args(ids, true), &MediaCancelToken::new())
+            .is_err());
+        assert_eq!(core.runtime_snapshot().timeline, before.timeline);
+    }
+
+    #[test]
+    fn script_to_video_three_segment_plan_apply_cancel_reopen_and_export() {
+        if !opentake_media::ffmpeg_status::ffmpeg_available()
+            || !opentake_media::ffmpeg_status::ffprobe_available()
+        {
+            return;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let bundle = root.path().join("ScriptVideo.opentake");
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 6,
+            width: 96,
+            height: 54,
+        })
+        .unwrap();
+        core.save_project(Some(bundle.clone())).unwrap();
+        let colors = [[220, 40, 40, 255], [40, 220, 40, 255], [40, 40, 220, 255]];
+        let mut imports = Vec::new();
+        for (index, color) in colors.into_iter().enumerate() {
+            let path = root.path().join(format!("scene-{index}.png"));
+            image::RgbaImage::from_pixel(96, 54, image::Rgba(color))
+                .save(&path)
+                .unwrap();
+            imports.push(PreparedMediaImportOp::ImportFile {
+                path,
+                name: format!("scene-{index}.png"),
+                probe: ProbedMedia {
+                    duration_secs: 0.0,
+                    width: Some(96),
+                    height: Some(54),
+                    ..ProbedMedia::default()
+                },
+                folder: None,
+            });
+        }
+        let narration_path = root.path().join("narration.wav");
+        let status = Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-f",
+                "lavfi",
+                "-i",
+            ])
+            .arg("sine=frequency=440:sample_rate=48000:duration=1")
+            .arg(&narration_path)
+            .status()
+            .unwrap();
+        assert!(status.success());
+        imports.push(PreparedMediaImportOp::ImportFile {
+            path: narration_path,
+            name: "narration.wav".into(),
+            probe: ProbedMedia {
+                duration_secs: 1.0,
+                has_audio: true,
+                ..ProbedMedia::default()
+            },
+            folder: None,
+        });
+        let snapshot = core.runtime_snapshot();
+        let imported = core
+            .import_media_batch_for_project_persisted(snapshot.project_epoch, &bundle, imports)
+            .unwrap();
+        let visual_ids: Vec<_> = imported[..3]
+            .iter()
+            .map(|item| item.entry.id.clone())
+            .collect();
+        let narration_id = imported[3].entry.id.clone();
+        let args = ScriptToVideoArgs {
+            segments: visual_ids
+                .iter()
+                .enumerate()
+                .map(|(index, media_ref)| {
+                    let mut value = json!({
+                        "script": format!("Scene {}", index + 1),
+                        "mediaRef": media_ref,
+                        "narrationMediaRef": narration_id,
+                        "durationFrames": 6
+                    });
+                    if index < 2 {
+                        value["transition"] = json!("crossDissolve");
+                    }
+                    value
+                })
+                .collect(),
+            apply: Some(false),
+        };
+        let bridge = TauriAdvancedWorkflowBridge::new(
+            core.clone(),
+            root.path().join("cache"),
+            root.path().join("models"),
+        );
+        assert!(bridge.supported_tools().contains(&ToolName::ScriptToVideo));
+        let planned = bridge
+            .script_to_video(args.clone(), &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(planned.action_name.as_deref(), Some("Plan Script Video"));
+        assert_eq!(planned.result["segments"].as_array().unwrap().len(), 3);
+        let after_plan = core.runtime_snapshot();
+        assert!(after_plan.timeline.tracks.is_empty());
+        assert_eq!(after_plan.timeline.script_assembly_plans.len(), 1);
+
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        let error = bridge
+            .script_to_video(
+                ScriptToVideoArgs {
+                    apply: Some(true),
+                    ..args.clone()
+                },
+                &cancelled,
+            )
+            .expect_err("pre-cancelled assembly must not mutate");
+        assert_eq!(error.kind, AdvancedWorkflowErrorKind::Cancelled);
+        assert_eq!(core.runtime_snapshot().timeline, after_plan.timeline);
+
+        let applied = bridge
+            .script_to_video(
+                ScriptToVideoArgs {
+                    apply: Some(true),
+                    ..args
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(applied.action_name.as_deref(), Some("Build Script Video"));
+        let assembled = core.runtime_snapshot();
+        assert_eq!(assembled.timeline.tracks.len(), 2);
+        assert_eq!(assembled.timeline.tracks[0].clips.len(), 3);
+        assert_eq!(assembled.timeline.tracks[1].clips.len(), 3);
+        for index in 0..3 {
+            assert_eq!(
+                assembled.timeline.tracks[0].clips[index].start_frame,
+                index as i32 * 6
+            );
+            assert_eq!(
+                assembled.timeline.tracks[1].clips[index].start_frame,
+                index as i32 * 6
+            );
+        }
+        for index in 0..2 {
+            let transition = assembled.timeline.tracks[0].clips[index]
+                .transition_out
+                .as_ref()
+                .unwrap();
+            assert_eq!(
+                transition.to_clip_id,
+                assembled.timeline.tracks[0].clips[index + 1].id
+            );
+        }
+        core.save_project(None).unwrap();
+        let reopened = AppCore::new();
+        reopened.open_project(&bundle).unwrap();
+        assert_eq!(reopened.runtime_snapshot().timeline, assembled.timeline);
+
+        let out = root.path().join("script-video.mp4");
+        let summary = crate::export::run_export(
+            &assembled.timeline,
+            &assembled.media,
+            &assembled.project_dir,
+            &crate::export::ExportRequest {
+                out_path: out.to_string_lossy().into_owned(),
+                codec: crate::export::ExportCodec::H264,
+                quality: crate::export::ExportQuality::P720,
+            },
+        )
+        .unwrap();
+        assert_eq!(summary.frame_count, 18);
+        assert!(summary.has_audio);
+        let output_probe = probe(&out).unwrap();
+        assert!(output_probe.has_audio);
+
+        core.undo().unwrap();
+        let undone = core.runtime_snapshot();
+        assert!(undone.timeline.tracks.is_empty());
+        assert_eq!(undone.timeline.script_assembly_plans.len(), 1);
+    }
+
+    struct IdentityFixture {
+        root: tempfile::TempDir,
+        bundle: PathBuf,
+        core: AppCore,
+        portrait_id: String,
+        audio_id: String,
+        avatar_video: PathBuf,
+        generated_voice: PathBuf,
+    }
+
+    fn identity_fixture() -> Option<IdentityFixture> {
+        if !opentake_media::ffmpeg_status::ffmpeg_available()
+            || !opentake_media::ffmpeg_status::ffprobe_available()
+        {
+            return None;
+        }
+        let root = tempfile::tempdir().unwrap();
+        let bundle = root.path().join("Identity.opentake");
+        let portrait = root.path().join("portrait.png");
+        image::RgbaImage::from_pixel(96, 54, image::Rgba([80, 140, 220, 255]))
+            .save(&portrait)
+            .unwrap();
+        let narration = root.path().join("narration.wav");
+        assert!(Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-f",
+                "lavfi",
+                "-i",
+                "sine=frequency=440:sample_rate=48000:duration=1",
+            ])
+            .arg(&narration)
+            .status()
+            .unwrap()
+            .success());
+        let generated_voice = root.path().join("generated-voice.mp3");
+        assert!(Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args(["-hide_banner", "-loglevel", "error", "-y", "-i"])
+            .arg(&narration)
+            .args(["-c:a", "libmp3lame"])
+            .arg(&generated_voice)
+            .status()
+            .unwrap()
+            .success());
+        let avatar_video = root.path().join("avatar.mp4");
+        assert!(Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+            .args([
+                "-hide_banner",
+                "-loglevel",
+                "error",
+                "-y",
+                "-loop",
+                "1",
+                "-i"
+            ])
+            .arg(&portrait)
+            .arg("-i")
+            .arg(&narration)
+            .args([
+                "-t",
+                "1",
+                "-r",
+                "6",
+                "-c:v",
+                "libx264",
+                "-pix_fmt",
+                "yuv420p",
+                "-c:a",
+                "aac",
+                "-shortest",
+            ])
+            .arg(&avatar_video)
+            .status()
+            .unwrap()
+            .success());
+        let core = AppCore::new();
+        core.apply(EditCommand::SetTimelineSettings {
+            fps: 6,
+            width: 96,
+            height: 54,
+        })
+        .unwrap();
+        core.save_project(Some(bundle.clone())).unwrap();
+        let to_probe = |path: &Path| {
+            let value = probe(path).unwrap();
+            ProbedMedia {
+                duration_secs: value.duration_secs,
+                width: value.width.and_then(|width| i32::try_from(width).ok()),
+                height: value.height.and_then(|height| i32::try_from(height).ok()),
+                fps: value.fps,
+                has_audio: value.has_audio,
+                color: value.color,
+            }
+        };
+        let imported = core
+            .import_media_batch_for_project_persisted(
+                core.runtime_snapshot().project_epoch,
+                &bundle,
+                vec![
+                    PreparedMediaImportOp::ImportFile {
+                        path: portrait.clone(),
+                        name: "portrait.png".into(),
+                        probe: to_probe(&portrait),
+                        folder: None,
+                    },
+                    PreparedMediaImportOp::ImportFile {
+                        path: narration.clone(),
+                        name: "narration.wav".into(),
+                        probe: to_probe(&narration),
+                        folder: None,
+                    },
+                ],
+            )
+            .unwrap();
+        Some(IdentityFixture {
+            root,
+            bundle,
+            core,
+            portrait_id: imported[0].entry.id.clone(),
+            audio_id: imported[1].entry.id.clone(),
+            avatar_video,
+            generated_voice,
+        })
+    }
+
+    #[test]
+    fn avatar_consent_failure_cancel_import_undo_reopen_and_export() {
+        let Some(fixture) = identity_fixture() else {
+            return;
+        };
+        let calls = Arc::new(Mutex::new(0));
+        let provider = Arc::new(FixtureAvatarProvider {
+            fixture: fixture.avatar_video.clone(),
+            fail: false,
+            calls: calls.clone(),
+        });
+        let voice = Arc::new(FixtureVoiceProvider {
+            fixture: fixture.generated_voice.clone(),
+            fail_generation: false,
+            revoked: Arc::new(Mutex::new(HashSet::new())),
+            calls: Arc::new(Mutex::new(Vec::new())),
+        });
+        let bridge = TauriAdvancedWorkflowBridge::with_identity_providers(
+            fixture.core.clone(),
+            fixture.root.path().join("cache"),
+            fixture.root.path().join("models"),
+            provider,
+            voice,
+        );
+        let args = GenerateAvatarArgs {
+            portrait_media_ref: fixture.portrait_id.clone(),
+            audio_media_ref: fixture.audio_id.clone(),
+            consent_id: "consent-avatar-fixture".into(),
+            provider: Some("fal".into()),
+            model: Some("fal-ai/sync-lipsync/v3/image-to-video".into()),
+            cost_authorized: Some(true),
+            start_frame: Some(0),
+        };
+        let before = fixture.core.runtime_snapshot();
+        let denied = bridge
+            .generate_avatar(
+                GenerateAvatarArgs {
+                    cost_authorized: Some(false),
+                    ..args.clone()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap_err();
+        assert_eq!(
+            denied.kind,
+            AdvancedWorkflowErrorKind::CostAuthorizationRequired
+        );
+        assert_eq!(*calls.lock().unwrap(), 0);
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        assert_eq!(
+            bridge
+                .generate_avatar(args.clone(), &cancelled)
+                .unwrap_err()
+                .kind,
+            AdvancedWorkflowErrorKind::Cancelled
+        );
+        assert_eq!(fixture.core.runtime_snapshot().media, before.media);
+        let result = bridge
+            .generate_avatar(args, &MediaCancelToken::new())
+            .unwrap();
+        assert_eq!(result.action_name.as_deref(), Some("Generate Avatar"));
+        assert_eq!(*calls.lock().unwrap(), 1);
+        let generated = fixture.core.runtime_snapshot();
+        assert_eq!(
+            generated.media.entries.len(),
+            before.media.entries.len() + 1
+        );
+        assert_eq!(generated.timeline.tracks.len(), 1);
+        let entry = generated.media.entries.last().unwrap();
+        let provenance = entry.generation_input.as_ref().unwrap();
+        assert_eq!(
+            provenance.consent_id.as_deref(),
+            Some("consent-avatar-fixture")
+        );
+        assert_eq!(
+            provenance.reference_audio_asset_ids.as_deref(),
+            Some([fixture.audio_id.clone()].as_slice())
+        );
+        assert_eq!(provenance.request_hash.as_ref().unwrap().len(), 64);
+        assert!(!serde_json::to_string(&generated.media)
+            .unwrap()
+            .contains("api-key"));
+        let reopened = AppCore::new();
+        reopened.open_project(&fixture.bundle).unwrap();
+        assert_eq!(reopened.runtime_snapshot().timeline, generated.timeline);
+        let out = fixture.root.path().join("avatar-export.mp4");
+        let summary = crate::export::run_export(
+            &generated.timeline,
+            &generated.media,
+            &generated.project_dir,
+            &crate::export::ExportRequest {
+                out_path: out.to_string_lossy().into_owned(),
+                codec: crate::export::ExportCodec::H264,
+                quality: crate::export::ExportQuality::P720,
+            },
+        )
+        .unwrap();
+        assert_eq!(summary.frame_count, 6);
+        assert!(summary.has_audio);
+        assert!(probe(&out).unwrap().has_audio);
+        fixture.core.undo().unwrap();
+        let undone = fixture.core.runtime_snapshot();
+        assert_eq!(undone.media, before.media);
+        assert!(undone.timeline.tracks.is_empty());
+    }
+
+    #[test]
+    fn voice_clone_consent_provider_cancel_revoke_and_reopen_contract() {
+        let Some(fixture) = identity_fixture() else {
+            return;
+        };
+        let calls = Arc::new(Mutex::new(Vec::new()));
+        let revoked = Arc::new(Mutex::new(HashSet::new()));
+        let voice = Arc::new(FixtureVoiceProvider {
+            fixture: fixture.generated_voice.clone(),
+            fail_generation: false,
+            revoked: revoked.clone(),
+            calls: calls.clone(),
+        });
+        let avatar = Arc::new(FixtureAvatarProvider {
+            fixture: fixture.avatar_video.clone(),
+            fail: false,
+            calls: Arc::new(Mutex::new(0)),
+        });
+        let bridge = TauriAdvancedWorkflowBridge::with_identity_providers(
+            fixture.core.clone(),
+            fixture.root.path().join("cache"),
+            fixture.root.path().join("models"),
+            avatar,
+            voice,
+        );
+        let invalid = bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "enroll".into(),
+                    reference_audio_media_ref: Some(fixture.audio_id.clone()),
+                    consent_id: "no".into(),
+                    voice_name: Some("Narrator".into()),
+                    cost_authorized: Some(true),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap_err();
+        assert_eq!(invalid.kind, AdvancedWorkflowErrorKind::ConsentRequired);
+        let enrollment = bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "enroll".into(),
+                    reference_audio_media_ref: Some(fixture.audio_id.clone()),
+                    consent_id: "consent-voice-fixture".into(),
+                    voice_name: Some("Narrator".into()),
+                    provider: Some("elevenlabs".into()),
+                    model: Some("eleven_multilingual_v2".into()),
+                    cost_authorized: Some(true),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        let voice_id = enrollment.result["voiceId"].as_str().unwrap().to_string();
+        assert_eq!(calls.lock().unwrap().as_slice(), ["enroll"]);
+        let enrolled = fixture.core.runtime_snapshot();
+        assert_eq!(enrolled.timeline.voice_models.len(), 1);
+        assert!(!enrolled.timeline.voice_models[0].revoked);
+        let cancelled = MediaCancelToken::new();
+        cancelled.cancel();
+        assert_eq!(
+            bridge
+                .clone_voice(
+                    CloneVoiceArgs {
+                        action: "generate".into(),
+                        consent_id: "consent-voice-fixture".into(),
+                        voice_id: Some(voice_id.clone()),
+                        prompt: Some("Hello from the cloned voice".into()),
+                        cost_authorized: Some(true),
+                        ..CloneVoiceArgs::default()
+                    },
+                    &cancelled,
+                )
+                .unwrap_err()
+                .kind,
+            AdvancedWorkflowErrorKind::Cancelled
+        );
+        assert_eq!(calls.lock().unwrap().as_slice(), ["enroll"]);
+        let failed_calls = Arc::new(Mutex::new(Vec::new()));
+        let failed_bridge = TauriAdvancedWorkflowBridge::with_identity_providers(
+            fixture.core.clone(),
+            fixture.root.path().join("failed-cache"),
+            fixture.root.path().join("models"),
+            Arc::new(FixtureAvatarProvider {
+                fixture: fixture.avatar_video.clone(),
+                fail: false,
+                calls: Arc::new(Mutex::new(0)),
+            }),
+            Arc::new(FixtureVoiceProvider {
+                fixture: fixture.generated_voice.clone(),
+                fail_generation: true,
+                revoked: revoked.clone(),
+                calls: failed_calls,
+            }),
+        );
+        let before_failure = fixture.core.runtime_snapshot();
+        assert!(failed_bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "generate".into(),
+                    consent_id: "consent-voice-fixture".into(),
+                    voice_id: Some(voice_id.clone()),
+                    prompt: Some("Provider failure".into()),
+                    cost_authorized: Some(true),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .is_err());
+        assert_eq!(fixture.core.runtime_snapshot().media, before_failure.media);
+        let generated = bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "generate".into(),
+                    consent_id: "consent-voice-fixture".into(),
+                    voice_id: Some(voice_id.clone()),
+                    prompt: Some("Hello from the cloned voice".into()),
+                    cost_authorized: Some(true),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(generated.result["imported"], true);
+        let after_generation = fixture.core.runtime_snapshot();
+        assert_eq!(
+            after_generation.media.entries.len(),
+            enrolled.media.entries.len() + 1
+        );
+        assert_eq!(after_generation.timeline.tracks.len(), 1);
+        let generated_entry = after_generation.media.entries.last().unwrap();
+        assert_eq!(
+            generated_entry
+                .generation_input
+                .as_ref()
+                .unwrap()
+                .voice
+                .as_deref(),
+            Some(voice_id.as_str())
+        );
+        fixture.core.undo().unwrap();
+        assert_eq!(fixture.core.runtime_snapshot().media, enrolled.media);
+        let revoked_result = bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "revoke".into(),
+                    consent_id: "consent-voice-fixture".into(),
+                    voice_id: Some(voice_id.clone()),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap();
+        assert_eq!(revoked_result.result["revoked"], true);
+        assert!(revoked.lock().unwrap().contains("provider-voice-fixture"));
+        fixture.core.undo().unwrap();
+        assert!(fixture.core.runtime_snapshot().timeline.voice_models[0].revoked);
+        let call_count = calls.lock().unwrap().len();
+        let rejected = bridge
+            .clone_voice(
+                CloneVoiceArgs {
+                    action: "generate".into(),
+                    consent_id: "consent-voice-fixture".into(),
+                    voice_id: Some(voice_id),
+                    prompt: Some("Must not run".into()),
+                    cost_authorized: Some(true),
+                    ..CloneVoiceArgs::default()
+                },
+                &MediaCancelToken::new(),
+            )
+            .unwrap_err();
+        assert_eq!(rejected.kind, AdvancedWorkflowErrorKind::ConsentRequired);
+        assert_eq!(calls.lock().unwrap().len(), call_count);
+        let reopened = AppCore::new();
+        reopened.open_project(&fixture.bundle).unwrap();
+        assert!(reopened.runtime_snapshot().timeline.voice_models[0].revoked);
+    }
+}
diff --git a/src-tauri/src/captions.rs b/src-tauri/src/captions.rs
index 5225a0c3..2e69b39a 100644
--- a/src-tauri/src/captions.rs
+++ b/src-tauri/src/captions.rs
@@ -435,6 +435,8 @@ mod tests {
             source_height: None,
             source_fps: None,
             has_audio: Some(has_audio),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/src-tauri/src/chat.rs b/src-tauri/src/chat.rs
index d33efdf3..1c5d01fc 100644
--- a/src-tauri/src/chat.rs
+++ b/src-tauri/src/chat.rs
@@ -18,12 +18,14 @@ use serde::Serialize;
 use tauri::{AppHandle, Emitter, State};
 
 use opentake_agent::chat::{
-    ChatLoop, ChatMessage, ChatSession, ChatSessionStore, ChatTurnGate, EmitLoop, LoopError,
-    LoopEvent,
+    ChatLoop, ChatMessage, ChatSession, ChatSessionStore, ChatTurnGate, EmitLoop, LlmError,
+    LoopError, LoopEvent, Role,
 };
+use opentake_agent::mcp::advanced::AdvancedWorkflowBridge;
 use opentake_agent::mcp::core_handle::{AppCoreHandle, CoreHandle};
 use opentake_agent::mcp::dispatch::Dispatcher;
 use opentake_agent::mcp::generation::GenerationBridge;
+use opentake_agent::mcp::motion::MotionBridge;
 use opentake_agent::tools::result::ToolResult;
 use opentake_gen::{KeyStore, KeyringStore};
 
@@ -97,17 +99,27 @@ impl ChatState {
         cache_root: PathBuf,
         models_dir: PathBuf,
     ) -> Self {
-        Self::new_inner(core, workflows_dir, cache_root, models_dir, None)
+        Self::new_inner(
+            core,
+            workflows_dir,
+            cache_root,
+            models_dir,
+            None,
+            None,
+            None,
+        )
     }
 
     /// Build the state in `setup`: a dispatcher over the live core + workflow
     /// registry + the same media bridge the desktop MCP server uses.
-    pub fn new_with_generation(
+    pub fn new_with_capabilities(
         core: AppCore,
         workflows_dir: PathBuf,
         cache_root: PathBuf,
         models_dir: PathBuf,
         generation_bridge: Arc<dyn GenerationBridge>,
+        motion_bridge: Arc<dyn MotionBridge>,
+        advanced_bridge: Arc<dyn AdvancedWorkflowBridge>,
     ) -> Self {
         Self::new_inner(
             core,
@@ -115,6 +127,8 @@ impl ChatState {
             cache_root,
             models_dir,
             Some(generation_bridge),
+            Some(motion_bridge),
+            Some(advanced_bridge),
         )
     }
 
@@ -124,15 +138,19 @@ impl ChatState {
         cache_root: PathBuf,
         models_dir: PathBuf,
         generation_bridge: Option<Arc<dyn GenerationBridge>>,
+        motion_bridge: Option<Arc<dyn MotionBridge>>,
+        advanced_bridge: Option<Arc<dyn AdvancedWorkflowBridge>>,
     ) -> Self {
         let handle: Arc<dyn CoreHandle> = Arc::new(AppCoreHandle::new(core.clone()));
         let registry = Arc::new(RwLock::new(crate::mcp::build_registry(&workflows_dir)));
         let bridge = crate::mcp::build_media_bridge(core.clone(), cache_root, models_dir);
-        let dispatcher = Arc::new(Dispatcher::with_bridges(
+        let dispatcher = Arc::new(Dispatcher::with_all_capability_bridges(
             handle,
             registry.clone(),
             Some(bridge),
             generation_bridge,
+            motion_bridge,
+            advanced_bridge,
         ));
         let store: Arc<dyn KeyStore> = Arc::new(KeyringStore::new());
         let sessions = Arc::new(Mutex::new(HashMap::new()));
@@ -476,6 +494,47 @@ impl ChatTurnGate for ProjectTurnGate {
     }
 }
 
+fn truncate_for_codex_prompt(text: &str, max_chars: usize) -> String {
+    let mut chars = text.chars();
+    let truncated = chars.by_ref().take(max_chars).collect::<String>();
+    if chars.next().is_some() {
+        format!("{truncated}…")
+    } else {
+        truncated
+    }
+}
+
+fn codex_turn_prompt(session: &ChatSession, user_text: &str) -> String {
+    let mut history = session
+        .messages
+        .iter()
+        .rev()
+        .skip(1)
+        .filter_map(|message| match message.role {
+            Role::User => Some(format!(
+                "User: {}",
+                truncate_for_codex_prompt(&message.content, 2_000)
+            )),
+            Role::Assistant if !message.content.trim().is_empty() => Some(format!(
+                "Assistant: {}",
+                truncate_for_codex_prompt(&message.content, 2_000)
+            )),
+            _ => None,
+        })
+        .take(6)
+        .collect::<Vec<_>>();
+    history.reverse();
+    let history = history.join("\n");
+    format!(
+        "You are the official Codex Agent embedded in OpenTake, a desktop video editor. \
+Use only the `opentake` MCP server for reading or changing the current project. \
+Do not use shell commands, direct file edits, web search, plugins, or other MCP servers. \
+Treat the current saved OpenTake project as the sole editing target. Explain the completed result concisely.\n\n\
+Recent conversation:\n{history}\n\nCurrent user request:\n{}",
+        truncate_for_codex_prompt(user_text, 20_000)
+    )
+}
+
 // MARK: - Commands
 
 /// `chat_send`: spawn a chat turn. Returns immediately; the turn streams via
@@ -518,15 +577,78 @@ pub async fn chat_send(
             state: state_clone.clone(),
             project: project.clone(),
         };
-        let gate: Arc<dyn ChatTurnGate> = Arc::new(ProjectTurnGate {
-            state: state_clone.clone(),
-            project: project.clone(),
-            cancel: turn_cancel,
-        });
-        let result = state_clone
-            .loop_
-            .run_turn_gated(&mut session, chat_provider, text, &emitter, cancel, gate)
-            .await;
+        let result = if chat_provider == "codex" {
+            session.provider = Some("codex".into());
+            session.model = Some("official-codex-default".into());
+            let prompt = codex_turn_prompt(&session, &text);
+            match crate::codex::run_agent_turn(&project.project_dir, &prompt, cancel, |tool_call| {
+                emitter.emit(LoopEvent::ToolCall {
+                    session_id: sid.clone(),
+                    tool_call,
+                });
+            })
+            .await
+            {
+                Ok(output) => {
+                    let message = ChatMessage::assistant(output.text.clone(), output.tool_calls);
+                    emitter.emit(LoopEvent::Delta {
+                        session_id: sid.clone(),
+                        delta: output.text,
+                    });
+                    emitter.emit(LoopEvent::Done {
+                        session_id: sid.clone(),
+                        message: message.clone(),
+                    });
+                    session.messages.push(message);
+                    Ok(())
+                }
+                Err(crate::codex::CodexTurnError::Cancelled) => Err(LoopError::Cancelled),
+                Err(crate::codex::CodexTurnError::Unavailable) => {
+                    let guide = "Official Codex CLI was not found. Install Codex, then return to Settings → AI and choose Official Codex / ChatGPT.".to_string();
+                    let message = ChatMessage::assistant(guide.clone(), Vec::new());
+                    emitter.emit(LoopEvent::Delta {
+                        session_id: sid.clone(),
+                        delta: guide,
+                    });
+                    emitter.emit(LoopEvent::Done {
+                        session_id: sid.clone(),
+                        message: message.clone(),
+                    });
+                    session.messages.push(message);
+                    Ok(())
+                }
+                Err(crate::codex::CodexTurnError::NotAuthenticated) => {
+                    let guide = "Codex is not signed in. Open Settings → AI, choose Official Codex / ChatGPT, and sign in with ChatGPT.".to_string();
+                    let message = ChatMessage::assistant(guide.clone(), Vec::new());
+                    emitter.emit(LoopEvent::Delta {
+                        session_id: sid.clone(),
+                        delta: guide,
+                    });
+                    emitter.emit(LoopEvent::Done {
+                        session_id: sid.clone(),
+                        message: message.clone(),
+                    });
+                    session.messages.push(message);
+                    Ok(())
+                }
+                Err(crate::codex::CodexTurnError::Failed) => {
+                    Err(LoopError::Llm(LlmError::Provider(
+                        "official Codex turn failed; check the Codex login status and try again"
+                            .into(),
+                    )))
+                }
+            }
+        } else {
+            let gate: Arc<dyn ChatTurnGate> = Arc::new(ProjectTurnGate {
+                state: state_clone.clone(),
+                project: project.clone(),
+                cancel: turn_cancel,
+            });
+            state_clone
+                .loop_
+                .run_turn_gated(&mut session, chat_provider, text, &emitter, cancel, gate)
+                .await
+        };
 
         match &result {
             Err(LoopError::Cancelled) => {
@@ -708,6 +830,23 @@ mod tests {
         assert_eq!(json["message"]["role"], "assistant");
     }
 
+    #[test]
+    fn codex_prompt_keeps_recent_context_and_limits_unbounded_history() {
+        let mut session = ChatSession::new("codex-prompt");
+        session.messages.push(ChatMessage::user("earlier request"));
+        session
+            .messages
+            .push(ChatMessage::assistant("earlier result", Vec::new()));
+        session.messages.push(ChatMessage::user("x".repeat(30_000)));
+
+        let prompt = codex_turn_prompt(&session, &"当前请求".repeat(10_000));
+        assert!(prompt.contains("User: earlier request"));
+        assert!(prompt.contains("Assistant: earlier result"));
+        assert!(prompt.contains("Current user request:"));
+        assert!(prompt.chars().count() < 21_000);
+        assert!(prompt.ends_with('…'));
+    }
+
     #[test]
     fn project_chat_session_reloads_from_the_bundle_after_state_recreation() {
         let temp = tempfile::tempdir().unwrap();
diff --git a/src-tauri/src/codex.rs b/src-tauri/src/codex.rs
new file mode 100644
index 00000000..70c22f89
--- /dev/null
+++ b/src-tauri/src/codex.rs
@@ -0,0 +1,512 @@
+//! Official Codex CLI integration.
+//!
+//! OpenTake never reads, copies, or stores Codex credentials. Authentication is
+//! delegated to the user-installed official CLI (`codex login`), and Agent
+//! turns run through `codex exec` using that CLI's existing ChatGPT session.
+
+use std::collections::HashMap;
+use std::path::{Path, PathBuf};
+use std::process::{Child, Command, Stdio};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex};
+
+use opentake_agent::chat::ToolCall;
+use serde::Serialize;
+use serde_json::Value;
+use tauri::State;
+use tokio::io::{AsyncBufReadExt, BufReader};
+
+const MCP_URL: &str = "http://127.0.0.1:19789/mcp";
+
+#[derive(Default)]
+pub struct CodexAuthState {
+    login_process: Mutex<Option<Child>>,
+}
+
+impl Drop for CodexAuthState {
+    fn drop(&mut self) {
+        if let Ok(process) = self.login_process.get_mut() {
+            if let Some(mut child) = process.take() {
+                let _ = child.kill();
+                let _ = child.wait();
+            }
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct CodexAuthStatus {
+    pub available: bool,
+    pub authenticated: bool,
+    pub auth_method: Option<String>,
+    pub version: Option<String>,
+    pub login_in_progress: bool,
+    pub message: String,
+}
+
+impl CodexAuthStatus {
+    fn unavailable() -> Self {
+        Self {
+            available: false,
+            authenticated: false,
+            auth_method: None,
+            version: None,
+            login_in_progress: false,
+            message: "Official Codex CLI was not found".into(),
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum CodexTurnError {
+    Cancelled,
+    Unavailable,
+    NotAuthenticated,
+    Failed,
+}
+
+#[derive(Debug)]
+pub struct CodexTurnOutput {
+    pub text: String,
+    pub tool_calls: Vec<ToolCall>,
+}
+
+/// Return candidate locations without trusting a packaged app's truncated PATH
+/// alone. `OPENTAKE_CODEX` is an explicit administrator/developer override.
+fn candidate_paths() -> Vec<PathBuf> {
+    let executable = if cfg!(windows) { "codex.exe" } else { "codex" };
+    let mut candidates = Vec::new();
+
+    if let Some(explicit) = std::env::var_os("OPENTAKE_CODEX") {
+        candidates.push(PathBuf::from(explicit));
+    }
+    if let Some(path) = std::env::var_os("PATH") {
+        candidates.extend(std::env::split_paths(&path).map(|dir| dir.join(executable)));
+    }
+
+    for dir in [
+        "/opt/homebrew/bin",
+        "/usr/local/bin",
+        "/opt/local/bin",
+        "/usr/bin",
+    ] {
+        candidates.push(PathBuf::from(dir).join(executable));
+    }
+
+    if let Some(home) = home_dir() {
+        candidates.push(home.join(".local/bin").join(executable));
+        candidates.push(home.join(".volta/bin").join(executable));
+        candidates.push(home.join(".cargo/bin").join(executable));
+
+        let nvm_nodes = home.join(".nvm/versions/node");
+        if let Ok(entries) = std::fs::read_dir(nvm_nodes) {
+            let mut versions = entries
+                .flatten()
+                .map(|entry| entry.path())
+                .collect::<Vec<_>>();
+            versions.sort_by(|a, b| b.file_name().cmp(&a.file_name()));
+            candidates.extend(
+                versions
+                    .into_iter()
+                    .map(|version| version.join("bin").join(executable)),
+            );
+        }
+    }
+
+    #[cfg(windows)]
+    if let Some(local_app_data) = std::env::var_os("LOCALAPPDATA") {
+        candidates.push(
+            PathBuf::from(local_app_data)
+                .join("Programs/OpenAI/Codex/bin")
+                .join(executable),
+        );
+    }
+
+    let mut seen = std::collections::HashSet::new();
+    candidates.retain(|path| seen.insert(path.clone()));
+    candidates
+}
+
+fn home_dir() -> Option<PathBuf> {
+    #[cfg(windows)]
+    {
+        std::env::var_os("USERPROFILE").map(PathBuf::from)
+    }
+    #[cfg(not(windows))]
+    {
+        std::env::var_os("HOME").map(PathBuf::from)
+    }
+}
+
+fn codex_version(path: &Path) -> Option<String> {
+    let output = Command::new(path)
+        .arg("--version")
+        .stdin(Stdio::null())
+        .output()
+        .ok()?;
+    if !output.status.success() {
+        return None;
+    }
+    let version = String::from_utf8_lossy(&output.stdout).trim().to_string();
+    version.starts_with("codex-cli ").then_some(version)
+}
+
+fn discover_codex() -> Option<(PathBuf, String)> {
+    candidate_paths().into_iter().find_map(|path| {
+        if !path.is_file() {
+            return None;
+        }
+        codex_version(&path).map(|version| (path, version))
+    })
+}
+
+fn parse_login_status(text: &str) -> (bool, Option<String>) {
+    let normalized = text.trim();
+    let lower = normalized.to_ascii_lowercase();
+    if !lower.contains("logged in") || lower.contains("not logged in") {
+        return (false, None);
+    }
+    let method = normalized
+        .split_once("using")
+        .map(|(_, value)| value.trim().trim_end_matches('.').to_string())
+        .filter(|value| !value.is_empty());
+    (true, method)
+}
+
+fn login_is_running(state: &CodexAuthState) -> Result<bool, String> {
+    let mut process = state.login_process.lock().map_err(|e| e.to_string())?;
+    let Some(child) = process.as_mut() else {
+        return Ok(false);
+    };
+    match child.try_wait().map_err(|e| e.to_string())? {
+        None => Ok(true),
+        Some(_) => {
+            process.take();
+            Ok(false)
+        }
+    }
+}
+
+fn auth_status(state: &CodexAuthState) -> Result<CodexAuthStatus, String> {
+    let login_in_progress = login_is_running(state)?;
+    let Some((path, version)) = discover_codex() else {
+        return Ok(CodexAuthStatus::unavailable());
+    };
+
+    if login_in_progress {
+        return Ok(CodexAuthStatus {
+            available: true,
+            authenticated: false,
+            auth_method: None,
+            version: Some(version),
+            login_in_progress: true,
+            message: "Waiting for official Codex browser login".into(),
+        });
+    }
+
+    let output = Command::new(path)
+        .args(["login", "status"])
+        .stdin(Stdio::null())
+        .output()
+        .map_err(|e| format!("could not check Codex login: {e}"))?;
+    let combined = format!(
+        "{}\n{}",
+        String::from_utf8_lossy(&output.stdout),
+        String::from_utf8_lossy(&output.stderr)
+    );
+    let (authenticated, auth_method) = parse_login_status(&combined);
+    Ok(CodexAuthStatus {
+        available: true,
+        authenticated,
+        auth_method,
+        version: Some(version),
+        login_in_progress: false,
+        message: if authenticated {
+            "Codex is signed in".into()
+        } else {
+            "Codex is not signed in".into()
+        },
+    })
+}
+
+#[tauri::command]
+pub fn codex_auth_status(state: State<'_, CodexAuthState>) -> Result<CodexAuthStatus, String> {
+    auth_status(&state)
+}
+
+#[tauri::command]
+pub fn codex_login_start(state: State<'_, CodexAuthState>) -> Result<CodexAuthStatus, String> {
+    let current = auth_status(&state)?;
+    if current.authenticated || current.login_in_progress {
+        return Ok(current);
+    }
+    let Some((path, version)) = discover_codex() else {
+        return Ok(CodexAuthStatus::unavailable());
+    };
+    let child = Command::new(path)
+        .arg("login")
+        .stdin(Stdio::null())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()
+        .map_err(|e| format!("could not start official Codex login: {e}"))?;
+    *state.login_process.lock().map_err(|e| e.to_string())? = Some(child);
+    Ok(CodexAuthStatus {
+        available: true,
+        authenticated: false,
+        auth_method: None,
+        version: Some(version),
+        login_in_progress: true,
+        message: "Waiting for official Codex browser login".into(),
+    })
+}
+
+#[tauri::command]
+pub fn codex_login_cancel(state: State<'_, CodexAuthState>) -> Result<CodexAuthStatus, String> {
+    if let Some(mut child) = state
+        .login_process
+        .lock()
+        .map_err(|e| e.to_string())?
+        .take()
+    {
+        let _ = child.kill();
+        let _ = child.wait();
+    }
+    auth_status(&state)
+}
+
+#[tauri::command]
+pub fn codex_logout(state: State<'_, CodexAuthState>) -> Result<CodexAuthStatus, String> {
+    if let Some(mut child) = state
+        .login_process
+        .lock()
+        .map_err(|e| e.to_string())?
+        .take()
+    {
+        let _ = child.kill();
+        let _ = child.wait();
+    }
+    let Some((path, _)) = discover_codex() else {
+        return Ok(CodexAuthStatus::unavailable());
+    };
+    Command::new(path)
+        .arg("logout")
+        .stdin(Stdio::null())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .status()
+        .map_err(|e| format!("could not sign out of Codex: {e}"))?;
+    auth_status(&state)
+}
+
+fn parse_exec_event(line: &str, tool_calls: &mut HashMap<String, ToolCall>) -> Option<String> {
+    let event: Value = serde_json::from_str(line).ok()?;
+    let event_type = event.get("type")?.as_str()?;
+    if event_type != "item.started" && event_type != "item.completed" {
+        return None;
+    }
+    let item = event.get("item")?;
+    match item.get("type")?.as_str()? {
+        "agent_message" if event_type == "item.completed" => {
+            item.get("text")?.as_str().map(str::to_owned)
+        }
+        "mcp_tool_call" => {
+            let id = item.get("id")?.as_str()?.to_string();
+            let name = item.get("tool")?.as_str()?.to_string();
+            let args = item
+                .get("arguments")
+                .cloned()
+                .unwrap_or_else(|| serde_json::json!({}));
+            let mut call = tool_calls
+                .remove(&id)
+                .unwrap_or_else(|| ToolCall::request(id.clone(), name, args));
+            if event_type == "item.completed" {
+                let error = item.get("error").filter(|value| !value.is_null());
+                call.is_error = Some(error.is_some());
+                call.result = Some(if let Some(error) = error {
+                    serde_json::json!({ "error": error })
+                } else {
+                    serde_json::json!({ "status": "completed" })
+                });
+            }
+            tool_calls.insert(id, call);
+            None
+        }
+        _ => None,
+    }
+}
+
+pub async fn run_agent_turn<F>(
+    project_dir: &Path,
+    prompt: &str,
+    cancel: Arc<AtomicBool>,
+    mut on_tool_call: F,
+) -> Result<CodexTurnOutput, CodexTurnError>
+where
+    F: FnMut(ToolCall),
+{
+    let Some((path, _)) = discover_codex() else {
+        return Err(CodexTurnError::Unavailable);
+    };
+    let output = Command::new(&path)
+        .args(["login", "status"])
+        .stdin(Stdio::null())
+        .output()
+        .map_err(|_| CodexTurnError::Unavailable)?;
+    let login_text = format!(
+        "{}\n{}",
+        String::from_utf8_lossy(&output.stdout),
+        String::from_utf8_lossy(&output.stderr)
+    );
+    if !parse_login_status(&login_text).0 {
+        return Err(CodexTurnError::NotAuthenticated);
+    }
+
+    let mut child = tokio::process::Command::new(path)
+        .args([
+            "exec",
+            "--json",
+            "--ephemeral",
+            "--ignore-user-config",
+            "--ignore-rules",
+            "--sandbox",
+            "read-only",
+            "--skip-git-repo-check",
+            "--color",
+            "never",
+            "-C",
+        ])
+        .arg(project_dir)
+        .args([
+            "-c",
+            &format!("mcp_servers.opentake.url=\"{MCP_URL}\""),
+            "-c",
+            "mcp_servers.opentake.required=true",
+            "-c",
+            "mcp_servers.opentake.default_tools_approval_mode=\"approve\"",
+            "-c",
+            "features.plugins=false",
+            "-c",
+            "features.remote_plugin=false",
+            "-c",
+            "features.shell_tool=false",
+            "-c",
+            "web_search=\"disabled\"",
+        ])
+        .arg(prompt)
+        .stdin(Stdio::null())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::null())
+        .kill_on_drop(true)
+        .spawn()
+        .map_err(|_| CodexTurnError::Failed)?;
+
+    let stdout = child.stdout.take().ok_or(CodexTurnError::Failed)?;
+    let mut lines = BufReader::new(stdout).lines();
+    let mut final_text = None;
+    let mut tool_calls = HashMap::new();
+
+    loop {
+        tokio::select! {
+            line = lines.next_line() => match line {
+                Ok(Some(line)) => {
+                    let previous = tool_calls.clone();
+                    if let Some(text) = parse_exec_event(&line, &mut tool_calls) {
+                        final_text = Some(text);
+                    }
+                    for (id, call) in &tool_calls {
+                        if !previous.contains_key(id)
+                            || previous.get(id).and_then(|old| old.result.as_ref())
+                                != call.result.as_ref()
+                        {
+                            on_tool_call(call.clone());
+                        }
+                    }
+                }
+                Ok(None) => break,
+                Err(_) => return Err(CodexTurnError::Failed),
+            },
+            _ = tokio::time::sleep(std::time::Duration::from_millis(100)) => {
+                if cancel.load(Ordering::Relaxed) {
+                    let _ = child.start_kill();
+                    let _ = child.wait().await;
+                    return Err(CodexTurnError::Cancelled);
+                }
+            }
+        }
+    }
+
+    if cancel.load(Ordering::Relaxed) {
+        let _ = child.start_kill();
+        let _ = child.wait().await;
+        return Err(CodexTurnError::Cancelled);
+    }
+    let status = child.wait().await.map_err(|_| CodexTurnError::Failed)?;
+    let text = final_text.filter(|text| !text.trim().is_empty());
+    if !status.success() || text.is_none() {
+        return Err(CodexTurnError::Failed);
+    }
+    let mut tool_calls = tool_calls.into_values().collect::<Vec<_>>();
+    tool_calls.sort_by(|a, b| a.id.cmp(&b.id));
+    Ok(CodexTurnOutput {
+        text: text.expect("checked above"),
+        tool_calls,
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_chatgpt_and_api_login_without_exposing_credentials() {
+        assert_eq!(
+            parse_login_status("Logged in using ChatGPT\n"),
+            (true, Some("ChatGPT".into()))
+        );
+        assert_eq!(
+            parse_login_status("Logged in using an API key."),
+            (true, Some("an API key".into()))
+        );
+        assert_eq!(parse_login_status("Not logged in"), (false, None));
+    }
+
+    #[test]
+    fn parses_codex_jsonl_agent_and_mcp_events() {
+        let mut calls = HashMap::new();
+        assert_eq!(
+            parse_exec_event(
+                r#"{"type":"item.started","item":{"id":"item_1","type":"mcp_tool_call","tool":"get_timeline","arguments":{}}}"#,
+                &mut calls,
+            ),
+            None
+        );
+        assert_eq!(calls["item_1"].name, "get_timeline");
+        assert_eq!(calls["item_1"].result, None);
+
+        parse_exec_event(
+            r#"{"type":"item.completed","item":{"id":"item_1","type":"mcp_tool_call","tool":"get_timeline","arguments":{},"result":{},"error":null}}"#,
+            &mut calls,
+        );
+        assert_eq!(calls["item_1"].is_error, Some(false));
+        assert_eq!(
+            parse_exec_event(
+                r#"{"type":"item.completed","item":{"id":"item_2","type":"agent_message","text":"1280 × 720"}}"#,
+                &mut calls,
+            ),
+            Some("1280 × 720".into())
+        );
+    }
+
+    #[test]
+    fn ignores_non_json_and_codex_diagnostic_events() {
+        let mut calls = HashMap::new();
+        assert_eq!(parse_exec_event("diagnostic", &mut calls), None);
+        assert_eq!(
+            parse_exec_event(r#"{"type":"thread.started"}"#, &mut calls),
+            None
+        );
+        assert!(calls.is_empty());
+    }
+}
diff --git a/src-tauri/src/commands.rs b/src-tauri/src/commands.rs
index e5983ca7..b167ee0c 100644
--- a/src-tauri/src/commands.rs
+++ b/src-tauri/src/commands.rs
@@ -1,10 +1,11 @@
 //! The `#[tauri::command]` surface.
 //!
-//! Each command is a thin shim: it locks nothing of its own, delegates to an
-//! `opentake_core::dto::handle_*` function (which wraps [`AppCore`]). Most
-//! boundary `CmdError`s become strings; playback-aware project lifecycle
-//! commands preserve the structured playback error code so overlap is reported
-//! as `busy` before core mutation.
+//! Each command is a thin shim over an `opentake_core::dto::handle_*` function
+//! (which wraps [`AppCore`]). Project New/Open additionally share one boundary
+//! single-flight gate so asynchronous project preparation cannot race another
+//! lifecycle transition. Core editing/history/save commands preserve
+//! `CmdError` at the IPC boundary; playback-aware lifecycle commands preserve
+//! their structured error code so callers never need to parse display text.
 //!
 //! `EditCommand` itself is not `Deserialize` (it carries engine value types with
 //! no serde derives), so the editing entry point takes a local serde-friendly
@@ -13,6 +14,7 @@
 use serde::{Deserialize, Serialize};
 use tauri::{AppHandle, Manager, State};
 
+use opentake_core::core::PreparedProjectOpen;
 use opentake_core::dto::{
     handle_edit_apply, handle_get_timeline, handle_project_new, handle_redo, handle_undo,
     EditResultDto, TimelineSnapshotDto,
@@ -25,10 +27,25 @@ use opentake_ops::{
 };
 
 use opentake_domain::{
-    AnimPair, ChromaKey, ClipType, ColorGrade, Crop, Effect, Interpolation, Keyframe,
-    KeyframeTrack, Mask, TextStyle, Transform,
+    AnimPair, AudioDenoise, ChromaKey, ClipType, ColorGrade, Crop, Effect, Interpolation, Keyframe,
+    KeyframeTrack, LoudnessNormalization, LutReference, Mask, StabilizationTrack, TextStyle,
+    Transform, TransitionKind,
 };
 
+#[derive(Clone, Default)]
+pub(crate) struct ProjectLifecycleCoordinator {
+    gate: std::sync::Arc<tokio::sync::Mutex<()>>,
+}
+
+impl ProjectLifecycleCoordinator {
+    fn try_acquire(&self) -> Result<tokio::sync::OwnedMutexGuard<()>, String> {
+        self.gate
+            .clone()
+            .try_lock_owned()
+            .map_err(|_| "another project lifecycle transition is already in progress".to_string())
+    }
+}
+
 // MARK: - Read / lifecycle commands (direct DTO passthrough)
 
 /// `get_timeline`: current read-only mirror + version. Infallible.
@@ -39,25 +56,47 @@ pub fn get_timeline(core: State<'_, AppCore>) -> TimelineSnapshotDto {
 
 /// `undo` / `redo`: global history navigation.
 #[tauri::command]
-pub fn undo(core: State<'_, AppCore>) -> Result<EditResultDto, String> {
-    handle_undo(&core).map_err(msg)
+pub fn undo(core: State<'_, AppCore>) -> Result<EditResultDto, CmdError> {
+    handle_undo(&core)
 }
 
 #[tauri::command]
-pub fn redo(core: State<'_, AppCore>) -> Result<EditResultDto, String> {
-    handle_redo(&core).map_err(msg)
+pub fn redo(core: State<'_, AppCore>) -> Result<EditResultDto, CmdError> {
+    handle_redo(&core)
 }
 
-/// `project_new`: replace the session with a fresh, unsaved project and return
-/// its first snapshot.
+/// `project_new`: replace the session with a fresh project and return its first
+/// snapshot. When `path` is supplied, build and persist the new bundle away
+/// from the live session, then install it atomically only after preparation
+/// succeeds.
 #[cfg(feature = "playback-engine")]
 #[tauri::command]
-pub fn project_new(
-    core: State<'_, AppCore>,
-    playback: State<'_, crate::playback::PlaybackState>,
-    prewarm: State<'_, crate::media::prewarm::PrewarmScheduler>,
+pub async fn project_new(
+    app: AppHandle,
+    path: Option<String>,
 ) -> Result<TimelineSnapshotDto, crate::playback::session::PlaybackCommandError> {
-    project_new_with_playback_and_prewarm(&core, &playback, &prewarm)
+    let _lifecycle = app
+        .state::<ProjectLifecycleCoordinator>()
+        .try_acquire()
+        .map_err(crate::playback::session::PlaybackCommandError::busy)?;
+    if let Some(path) = path {
+        app.state::<crate::playback::PlaybackState>()
+            .ensure_project_transition_available()?;
+        let prepared = prepare_saved_project_off_thread(std::path::PathBuf::from(path))
+            .await
+            .map_err(crate::playback::session::PlaybackCommandError::engine)?;
+        return commit_prepared_project_open_with_playback_and_prewarm(
+            &app.state::<AppCore>(),
+            prepared,
+            &app.state::<crate::playback::PlaybackState>(),
+            &app.state::<crate::media::prewarm::PrewarmScheduler>(),
+        );
+    }
+    project_new_with_playback_and_prewarm(
+        &app.state::<AppCore>(),
+        &app.state::<crate::playback::PlaybackState>(),
+        &app.state::<crate::media::prewarm::PrewarmScheduler>(),
+    )
 }
 
 #[cfg(all(feature = "playback-engine", test))]
@@ -89,10 +128,22 @@ fn project_new_with_playback_and_prewarm(
 
 #[cfg(not(feature = "playback-engine"))]
 #[tauri::command]
-pub fn project_new(
-    core: State<'_, AppCore>,
-    prewarm: State<'_, crate::media::prewarm::PrewarmScheduler>,
+pub async fn project_new(
+    app: AppHandle,
+    path: Option<String>,
 ) -> Result<TimelineSnapshotDto, String> {
+    let _lifecycle = app.state::<ProjectLifecycleCoordinator>().try_acquire()?;
+    if let Some(path) = path {
+        let prepared = prepare_saved_project_off_thread(std::path::PathBuf::from(path)).await?;
+        let core = app.state::<AppCore>();
+        let prewarm = app.state::<crate::media::prewarm::PrewarmScheduler>();
+        prewarm.begin_project_transition()?;
+        let snapshot = TimelineSnapshotDto::from(core.commit_project_open(prepared));
+        prewarm.activate_project(snapshot.project_epoch);
+        return Ok(snapshot);
+    }
+    let core = app.state::<AppCore>();
+    let prewarm = app.state::<crate::media::prewarm::PrewarmScheduler>();
     prewarm.begin_project_transition()?;
     let snapshot = handle_project_new(&core);
     prewarm.activate_project(snapshot.project_epoch);
@@ -100,15 +151,75 @@ pub fn project_new(
 }
 
 /// `project_open`: open a `.opentake` bundle, returning the first snapshot.
+const PROJECT_LIFECYCLE_PREPARE_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(15);
+
+async fn run_blocking_with_timeout<T, F>(
+    operation: &'static str,
+    timeout: std::time::Duration,
+    build: F,
+) -> Result<T, String>
+where
+    T: Send + 'static,
+    F: FnOnce() -> Result<T, String> + Send + 'static,
+{
+    let task = tokio::task::spawn_blocking(build);
+    match tokio::time::timeout(timeout, task).await {
+        Ok(Ok(result)) => result,
+        Ok(Err(error)) => Err(format!("{operation} task failed: {error}")),
+        Err(_) => Err(format!("{operation} timed out after {timeout:?}")),
+    }
+}
+
+async fn prepare_project_open_off_thread(
+    path: std::path::PathBuf,
+) -> Result<PreparedProjectOpen, String> {
+    run_blocking_with_timeout(
+        "project open",
+        PROJECT_LIFECYCLE_PREPARE_TIMEOUT,
+        move || AppCore::prepare_project_open(path).map_err(|error| error.to_string()),
+    )
+    .await
+}
+
+async fn prepare_saved_project_off_thread(
+    path: std::path::PathBuf,
+) -> Result<PreparedProjectOpen, String> {
+    run_blocking_with_timeout(
+        "project create",
+        PROJECT_LIFECYCLE_PREPARE_TIMEOUT,
+        move || {
+            AppCore::new()
+                .save_project(Some(path.clone()))
+                .map_err(|error| error.to_string())?;
+            AppCore::prepare_project_open(path).map_err(|error| error.to_string())
+        },
+    )
+    .await
+}
+
 #[cfg(feature = "playback-engine")]
 #[tauri::command]
-pub fn project_open(
-    core: State<'_, AppCore>,
+pub async fn project_open(
+    app: AppHandle,
     path: String,
-    playback: State<'_, crate::playback::PlaybackState>,
-    prewarm: State<'_, crate::media::prewarm::PrewarmScheduler>,
 ) -> Result<TimelineSnapshotDto, crate::playback::session::PlaybackCommandError> {
-    project_open_with_playback_and_prewarm(&core, path, &playback, &prewarm)
+    let _lifecycle = app
+        .state::<ProjectLifecycleCoordinator>()
+        .try_acquire()
+        .map_err(crate::playback::session::PlaybackCommandError::busy)?;
+    // Fail fast if another project transition is already active, but never hold
+    // a managed-state guard across the blocking filesystem prepare.
+    app.state::<crate::playback::PlaybackState>()
+        .ensure_project_transition_available()?;
+    let prepared = prepare_project_open_off_thread(std::path::PathBuf::from(path))
+        .await
+        .map_err(crate::playback::session::PlaybackCommandError::engine)?;
+    commit_prepared_project_open_with_playback_and_prewarm(
+        &app.state::<AppCore>(),
+        prepared,
+        &app.state::<crate::playback::PlaybackState>(),
+        &app.state::<crate::media::prewarm::PrewarmScheduler>(),
+    )
 }
 
 #[cfg(all(feature = "playback-engine", test))]
@@ -122,7 +233,7 @@ pub(crate) fn project_open_with_playback(
     project_open_with_playback_and_prewarm(core, path, playback, &prewarm)
 }
 
-#[cfg(feature = "playback-engine")]
+#[cfg(all(feature = "playback-engine", test))]
 pub(crate) fn project_open_with_playback_and_prewarm(
     core: &AppCore,
     path: String,
@@ -134,6 +245,16 @@ pub(crate) fn project_open_with_playback_and_prewarm(
         AppCore::prepare_project_open(std::path::PathBuf::from(path)).map_err(|error| {
             crate::playback::session::PlaybackCommandError::engine(error.to_string())
         })?;
+    commit_prepared_project_open_with_playback_and_prewarm(core, prepared, playback, prewarm)
+}
+
+#[cfg(feature = "playback-engine")]
+fn commit_prepared_project_open_with_playback_and_prewarm(
+    core: &AppCore,
+    prepared: PreparedProjectOpen,
+    playback: &crate::playback::PlaybackState,
+    prewarm: &crate::media::prewarm::PrewarmScheduler,
+) -> Result<TimelineSnapshotDto, crate::playback::session::PlaybackCommandError> {
     let transition = playback.begin_project_transition()?;
     if let Err(error) = prewarm.begin_project_transition() {
         playback.cancel_project_transition(transition);
@@ -147,13 +268,11 @@ pub(crate) fn project_open_with_playback_and_prewarm(
 
 #[cfg(not(feature = "playback-engine"))]
 #[tauri::command]
-pub fn project_open(
-    core: State<'_, AppCore>,
-    path: String,
-    prewarm: State<'_, crate::media::prewarm::PrewarmScheduler>,
-) -> Result<TimelineSnapshotDto, String> {
-    let prepared = AppCore::prepare_project_open(std::path::PathBuf::from(path))
-        .map_err(|error| error.to_string())?;
+pub async fn project_open(app: AppHandle, path: String) -> Result<TimelineSnapshotDto, String> {
+    let _lifecycle = app.state::<ProjectLifecycleCoordinator>().try_acquire()?;
+    let prepared = prepare_project_open_off_thread(std::path::PathBuf::from(path)).await?;
+    let core = app.state::<AppCore>();
+    let prewarm = app.state::<crate::media::prewarm::PrewarmScheduler>();
     prewarm.begin_project_transition()?;
     let snapshot = TimelineSnapshotDto::from(core.commit_project_open(prepared));
     prewarm.activate_project(snapshot.project_epoch);
@@ -173,7 +292,7 @@ pub fn project_open(
 /// risk lock reentrancy for no fidelity gain. Capture is best-effort: a failure
 /// yields `None`, leaving any existing cover untouched, and never fails the save.
 #[tauri::command]
-pub fn project_save(core: State<'_, AppCore>, path: Option<String>) -> Result<String, String> {
+pub fn project_save(core: State<'_, AppCore>, path: Option<String>) -> Result<String, CmdError> {
     let snapshot = core.runtime_snapshot();
     let thumbnail = opentake_media::capture_project_thumbnail(
         &snapshot.timeline,
@@ -184,7 +303,7 @@ pub fn project_save(core: State<'_, AppCore>, path: Option<String>) -> Result<St
     let target = path.map(std::path::PathBuf::from);
     core.save_project_with_thumbnail(target, thumbnail)
         .map(|p| p.to_string_lossy().into_owned())
-        .map_err(|e| e.to_string())
+        .map_err(CmdError::from)
 }
 
 /// `get_default_project_dir`: the default folder new projects save into
@@ -398,16 +517,21 @@ pub fn edit_apply(
     render: State<'_, crate::render::RenderState>,
     media: State<'_, crate::media::MediaState>,
     command: EditRequest,
-) -> Result<EditResultDto, String> {
+) -> Result<EditResultDto, CmdError> {
     let cmd = match command {
         EditRequest::FreezeFrame {
             clip_id,
             at_frame,
             duration_frames,
         } => {
-            validate_freeze_frame_request(&core, &clip_id, at_frame, duration_frames)?;
+            validate_freeze_frame_request(&core, &clip_id, at_frame, duration_frames)
+                .map_err(validation_error)?;
             let media_ref =
-                crate::render::capture_freeze_frame(&core, &render, &media, &clip_id, at_frame)?;
+                crate::render::capture_freeze_frame(&core, &render, &media, &clip_id, at_frame)
+                    .map_err(|error| {
+                        eprintln!("freeze-frame capture failed: {error}");
+                        internal_error("Freeze-frame capture failed")
+                    })?;
             EditCommand::FreezeFrame {
                 clip_id,
                 at_frame,
@@ -415,9 +539,9 @@ pub fn edit_apply(
                 media_ref,
             }
         }
-        other => other.into_command()?,
+        other => other.into_command().map_err(validation_error)?,
     };
-    handle_edit_apply(&core, cmd).map_err(msg)
+    handle_edit_apply(&core, cmd)
 }
 
 /// `check_path_exists`: checks if a path (e.g. project bundle folder) exists on disk.
@@ -426,8 +550,18 @@ pub fn check_path_exists(path: String) -> bool {
     std::path::Path::new(&path).exists()
 }
 
-fn msg(e: CmdError) -> String {
-    e.message
+fn validation_error(message: String) -> CmdError {
+    CmdError {
+        code: "validation".to_string(),
+        message,
+    }
+}
+
+fn internal_error(message: impl Into<String>) -> CmdError {
+    CmdError {
+        code: "internal".to_string(),
+        message: message.into(),
+    }
 }
 
 fn validate_freeze_frame_request(
@@ -471,8 +605,19 @@ fn validate_freeze_frame_request(
 /// union. Engine value types (`ClipMove`, `TrimEdit`, `FrameRange`, keyframe
 /// tracks) are mirrored as local serde DTOs and converted in [`into_command`].
 #[derive(Debug, Deserialize)]
-#[serde(tag = "type", rename_all = "camelCase")]
+#[serde(tag = "type", rename_all = "camelCase", deny_unknown_fields)]
 pub enum EditRequest {
+    #[serde(rename_all = "camelCase")]
+    CreateNestedSequence { name: String, clip_ids: Vec<String> },
+    #[serde(rename_all = "camelCase")]
+    EditNestedSequence {
+        sequence_id: String,
+        command: Box<EditRequest>,
+    },
+    #[serde(rename_all = "camelCase")]
+    RenameNestedSequence { sequence_id: String, name: String },
+    #[serde(rename_all = "camelCase")]
+    DissolveNestedSequence { clip_id: String },
     #[serde(rename_all = "camelCase")]
     AddClips { entries: Vec<ClipEntryDto> },
     #[serde(rename_all = "camelCase")]
@@ -553,6 +698,11 @@ pub enum EditRequest {
         grade: Option<ColorGrade>,
     },
     #[serde(rename_all = "camelCase")]
+    SetLut {
+        clip_ids: Vec<String>,
+        lut: Option<LutReference>,
+    },
+    #[serde(rename_all = "camelCase")]
     SetChromaKey {
         clip_ids: Vec<String>,
         chroma_key: Option<ChromaKey>,
@@ -568,6 +718,36 @@ pub enum EditRequest {
         effects: Vec<Effect>,
     },
     #[serde(rename_all = "camelCase")]
+    SetLoudnessNormalization {
+        clip_id: String,
+        normalization: Option<LoudnessNormalization>,
+    },
+    #[serde(rename_all = "camelCase")]
+    SetAudioDenoise {
+        clip_id: String,
+        denoise: Option<AudioDenoise>,
+    },
+    #[serde(rename_all = "camelCase")]
+    ApplyStabilization {
+        clip_id: String,
+        solution: StabilizationTrack,
+    },
+    #[serde(rename_all = "camelCase")]
+    AdjustStabilization {
+        clip_id: String,
+        strength: Option<f64>,
+        crop_margin: Option<f64>,
+    },
+    #[serde(rename_all = "camelCase")]
+    ResetStabilization { clip_id: String },
+    #[serde(rename_all = "camelCase")]
+    SetTransition {
+        from_clip_id: String,
+        to_clip_id: String,
+        kind: Option<TransitionKind>,
+        duration_frames: i32,
+    },
+    #[serde(rename_all = "camelCase")]
     RippleDeleteRanges {
         track_index: usize,
         ranges: Vec<FrameRangeDto>,
@@ -628,6 +808,22 @@ pub enum EditRequest {
 impl EditRequest {
     fn into_command(self) -> Result<EditCommand, String> {
         Ok(match self {
+            EditRequest::CreateNestedSequence { name, clip_ids } => {
+                EditCommand::CreateNestedSequenceFromClips { name, clip_ids }
+            }
+            EditRequest::EditNestedSequence {
+                sequence_id,
+                command,
+            } => EditCommand::EditNestedSequence {
+                sequence_id,
+                command: Box::new(command.into_command()?),
+            },
+            EditRequest::RenameNestedSequence { sequence_id, name } => {
+                EditCommand::RenameNestedSequence { sequence_id, name }
+            }
+            EditRequest::DissolveNestedSequence { clip_id } => {
+                EditCommand::DissolveNestedSequence { clip_id }
+            }
             EditRequest::AddClips { entries } => EditCommand::AddClips {
                 entries: entries.into_iter().map(ClipEntryDto::into_entry).collect(),
             },
@@ -732,6 +928,7 @@ impl EditRequest {
             EditRequest::SetColorGrade { clip_ids, grade } => {
                 EditCommand::SetColorGrade { clip_ids, grade }
             }
+            EditRequest::SetLut { clip_ids, lut } => EditCommand::SetLut { clip_ids, lut },
             EditRequest::SetChromaKey {
                 clip_ids,
                 chroma_key,
@@ -743,6 +940,42 @@ impl EditRequest {
             EditRequest::SetEffects { clip_ids, effects } => {
                 EditCommand::SetEffects { clip_ids, effects }
             }
+            EditRequest::SetLoudnessNormalization {
+                clip_id,
+                normalization,
+            } => EditCommand::SetLoudnessNormalization {
+                clip_id,
+                normalization,
+            },
+            EditRequest::SetAudioDenoise { clip_id, denoise } => {
+                EditCommand::SetAudioDenoise { clip_id, denoise }
+            }
+            EditRequest::ApplyStabilization { clip_id, solution } => {
+                EditCommand::ApplyStabilization { clip_id, solution }
+            }
+            EditRequest::AdjustStabilization {
+                clip_id,
+                strength,
+                crop_margin,
+            } => EditCommand::AdjustStabilization {
+                clip_id,
+                strength,
+                crop_margin,
+            },
+            EditRequest::ResetStabilization { clip_id } => {
+                EditCommand::ResetStabilization { clip_id }
+            }
+            EditRequest::SetTransition {
+                from_clip_id,
+                to_clip_id,
+                kind,
+                duration_frames,
+            } => EditCommand::SetTransition {
+                from_clip_id,
+                to_clip_id,
+                kind,
+                duration_frames,
+            },
             EditRequest::RippleDeleteRanges {
                 track_index,
                 ranges,
@@ -1189,6 +1422,110 @@ impl KeyframeValueDto {
     }
 }
 
+#[cfg(test)]
+mod project_open_async_tests {
+    use super::{
+        prepare_saved_project_off_thread, run_blocking_with_timeout, ProjectLifecycleCoordinator,
+    };
+    use opentake_core::core::PreparedProjectOpen;
+    use opentake_core::AppCore;
+    use std::time::Duration;
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn blocking_project_prepare_runs_off_the_async_caller_thread() {
+        let caller = std::thread::current().id();
+
+        let worker = run_blocking_with_timeout("test prepare", Duration::from_secs(1), || {
+            Ok(std::thread::current().id())
+        })
+        .await
+        .expect("blocking task completes");
+
+        assert_ne!(worker, caller);
+    }
+
+    #[test]
+    fn project_lifecycle_transitions_are_single_flight() {
+        let coordinator = ProjectLifecycleCoordinator::default();
+        let incumbent = coordinator.try_acquire().expect("first transition starts");
+
+        assert_eq!(
+            coordinator
+                .try_acquire()
+                .expect_err("overlapping transition must be busy"),
+            "another project lifecycle transition is already in progress"
+        );
+
+        drop(incumbent);
+        coordinator
+            .try_acquire()
+            .expect("transition may retry after incumbent settles");
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn timed_out_prepare_cannot_commit_a_late_project() {
+        let fixture = tempfile::tempdir().expect("fixture tempdir");
+        let bundle = fixture.path().join("slow.opentake");
+        AppCore::new()
+            .save_project(Some(bundle.clone()))
+            .expect("save project fixture");
+        let core = AppCore::new();
+        let before = core.project_revision();
+
+        let result: Result<PreparedProjectOpen, String> =
+            run_blocking_with_timeout("project open", Duration::from_millis(10), move || {
+                std::thread::sleep(Duration::from_millis(75));
+                AppCore::prepare_project_open(bundle).map_err(|error| error.to_string())
+            })
+            .await;
+
+        let error = match result {
+            Err(error) => error,
+            Ok(_) => panic!("slow prepare must time out"),
+        };
+        assert_eq!(error, "project open timed out after 10ms");
+        tokio::time::sleep(Duration::from_millis(100)).await;
+        assert_eq!(core.project_revision(), before);
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn saved_project_is_prepared_without_mutating_live_core_until_commit() {
+        let fixture = tempfile::tempdir().expect("fixture tempdir");
+        let bundle = fixture.path().join("Fresh.opentake");
+        let core = AppCore::new();
+        let before = core.project_revision();
+
+        let prepared = prepare_saved_project_off_thread(bundle.clone())
+            .await
+            .expect("new project bundle prepares");
+
+        assert_eq!(core.project_revision(), before);
+        assert!(bundle.join("project.json").is_file());
+        let snapshot = core.commit_project_open(prepared);
+        assert_eq!(snapshot.project_path.as_deref(), Some(bundle.as_path()));
+        assert_eq!(snapshot.version, 0);
+        assert_ne!(snapshot.project_epoch, before.project_epoch);
+    }
+
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn failed_saved_project_prepare_preserves_live_core() {
+        let fixture = tempfile::tempdir().expect("fixture tempdir");
+        let regular_file = fixture.path().join("not-a-directory");
+        std::fs::write(&regular_file, b"occupied").expect("write blocking fixture");
+        let bundle = regular_file.join("Fresh.opentake");
+        let core = AppCore::new();
+        let before = core.project_revision();
+
+        let error = match prepare_saved_project_off_thread(bundle).await {
+            Err(error) => error,
+            Ok(_) => panic!("invalid destination must fail"),
+        };
+
+        assert!(!error.is_empty());
+        assert_eq!(core.project_revision(), before);
+    }
+}
+
 #[cfg(all(test, feature = "playback-engine"))]
 mod project_prewarm_lifecycle_tests {
     use super::project_open_with_playback_and_prewarm;
@@ -1249,6 +1586,8 @@ mod project_prewarm_lifecycle_tests {
             source_height: Some(720),
             source_fps: Some(24.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -1297,7 +1636,10 @@ mod project_prewarm_lifecycle_tests {
                 .path,
             media_path
         );
-        let metrics = crate::playback::ManifestMetrics { sizes };
+        let metrics = crate::playback::ManifestMetrics {
+            sizes,
+            straight_alpha: std::collections::HashSet::new(),
+        };
         let plan = build_render_plan(
             &snapshot.timeline,
             RenderSize::new(
@@ -1357,9 +1699,338 @@ mod project_prewarm_lifecycle_tests {
 mod edit_request_serde_tests {
     use super::{validate_freeze_frame_request, EditRequest};
     use opentake_core::{AppCore, EditCommand};
-    use opentake_domain::ClipType;
+    use opentake_domain::{ClipType, TransitionKind};
     use opentake_ops::ClipEntry;
 
+    fn request_route(request: &EditRequest) -> &'static str {
+        match request {
+            EditRequest::CreateNestedSequence { .. } => "CreateNestedSequence",
+            EditRequest::EditNestedSequence { .. } => "EditNestedSequence",
+            EditRequest::RenameNestedSequence { .. } => "RenameNestedSequence",
+            EditRequest::DissolveNestedSequence { .. } => "DissolveNestedSequence",
+            EditRequest::AddClips { .. } => "AddClips",
+            EditRequest::InsertClips { .. } => "InsertClips",
+            EditRequest::MoveClips { .. } => "MoveClips",
+            EditRequest::DuplicateClips { .. } => "DuplicateClips",
+            EditRequest::RemoveClips { .. } => "RemoveClips",
+            EditRequest::SplitClip { .. } => "SplitClip",
+            EditRequest::FreezeFrame { .. } => "FreezeFrame",
+            EditRequest::TrimClips { .. } => "TrimClips",
+            EditRequest::SetClipProperties { .. } => "SetClipProperties",
+            EditRequest::SetKeyframes { .. } => "SetKeyframes",
+            EditRequest::StampKeyframe { .. } => "StampKeyframe",
+            EditRequest::UpsertKeyframe { .. } => "UpsertKeyframe",
+            EditRequest::RemoveKeyframe { .. } => "RemoveKeyframe",
+            EditRequest::MoveKeyframe { .. } => "MoveKeyframe",
+            EditRequest::SetKeyframeInterpolation { .. } => "SetKeyframeInterpolation",
+            EditRequest::SetColorGrade { .. } => "SetColorGrade",
+            EditRequest::SetLut { .. } => "SetLut",
+            EditRequest::SetChromaKey { .. } => "SetChromaKey",
+            EditRequest::SetMasks { .. } => "SetMasks",
+            EditRequest::SetEffects { .. } => "SetEffects",
+            EditRequest::SetLoudnessNormalization { .. } => "SetLoudnessNormalization",
+            EditRequest::SetAudioDenoise { .. } => "SetAudioDenoise",
+            EditRequest::ApplyStabilization { .. } => "ApplyStabilization",
+            EditRequest::AdjustStabilization { .. } => "AdjustStabilization",
+            EditRequest::ResetStabilization { .. } => "ResetStabilization",
+            EditRequest::SetTransition { .. } => "SetTransition",
+            EditRequest::RippleDeleteRanges { .. } => "RippleDeleteRanges",
+            EditRequest::RippleDeleteClips { .. } => "RippleDeleteClips",
+            EditRequest::AddTexts { .. } => "AddTexts",
+            EditRequest::AddTextsAutoTrack { .. } => "AddTextsAutoTrack",
+            EditRequest::AddCaptions { .. } => "AddCaptions",
+            EditRequest::Link { .. } => "Link",
+            EditRequest::Unlink { .. } => "Unlink",
+            EditRequest::RemoveTracks { .. } => "RemoveTracks",
+            EditRequest::SwapTracks { .. } => "SwapTracks",
+            EditRequest::SwapClips { .. } => "SwapClips",
+            EditRequest::InsertTrack { .. } => "InsertTrack",
+            EditRequest::SetTrackProps { .. } => "SetTrackProps",
+            EditRequest::CreateFolder { .. } => "CreateFolder",
+            EditRequest::MoveToFolder { .. } => "MoveToFolder",
+            EditRequest::RenameMedia { .. } => "RenameMedia",
+            EditRequest::RenameFolder { .. } => "RenameFolder",
+            EditRequest::DeleteMedia { .. } => "DeleteMedia",
+            EditRequest::DeleteFolder { .. } => "DeleteFolder",
+            EditRequest::SwapMedia { .. } => "SwapMedia",
+            EditRequest::ResetTransform { .. } => "ResetTransform",
+            EditRequest::SetTimelineSettings { .. } => "SetTimelineSettings",
+        }
+    }
+
+    fn command_matches_route(command: &EditCommand, route: &str) -> bool {
+        matches!(
+            (route, command),
+            (
+                "CreateNestedSequence",
+                EditCommand::CreateNestedSequenceFromClips { .. }
+            ) | ("EditNestedSequence", EditCommand::EditNestedSequence { .. })
+                | (
+                    "RenameNestedSequence",
+                    EditCommand::RenameNestedSequence { .. }
+                )
+                | (
+                    "DissolveNestedSequence",
+                    EditCommand::DissolveNestedSequence { .. }
+                )
+                | ("AddClips", EditCommand::AddClips { .. })
+                | ("InsertClips", EditCommand::InsertClips { .. })
+                | ("MoveClips", EditCommand::MoveClips { .. })
+                | ("DuplicateClips", EditCommand::DuplicateClips { .. })
+                | ("RemoveClips", EditCommand::RemoveClips { .. })
+                | ("SplitClip", EditCommand::SplitClip { .. })
+                | ("TrimClips", EditCommand::TrimClips { .. })
+                | ("SetClipProperties", EditCommand::SetClipProperties { .. })
+                | ("SetKeyframes", EditCommand::SetKeyframes { .. })
+                | ("StampKeyframe", EditCommand::StampKeyframe { .. })
+                | ("UpsertKeyframe", EditCommand::UpsertKeyframe { .. })
+                | ("RemoveKeyframe", EditCommand::RemoveKeyframe { .. })
+                | ("MoveKeyframe", EditCommand::MoveKeyframe { .. })
+                | (
+                    "SetKeyframeInterpolation",
+                    EditCommand::SetKeyframeInterpolation { .. }
+                )
+                | ("SetColorGrade", EditCommand::SetColorGrade { .. })
+                | ("SetLut", EditCommand::SetLut { .. })
+                | ("SetChromaKey", EditCommand::SetChromaKey { .. })
+                | ("SetMasks", EditCommand::SetMasks { .. })
+                | ("SetEffects", EditCommand::SetEffects { .. })
+                | (
+                    "SetLoudnessNormalization",
+                    EditCommand::SetLoudnessNormalization { .. }
+                )
+                | ("SetAudioDenoise", EditCommand::SetAudioDenoise { .. })
+                | ("ApplyStabilization", EditCommand::ApplyStabilization { .. })
+                | (
+                    "AdjustStabilization",
+                    EditCommand::AdjustStabilization { .. }
+                )
+                | ("ResetStabilization", EditCommand::ResetStabilization { .. })
+                | ("SetTransition", EditCommand::SetTransition { .. })
+                | ("RippleDeleteRanges", EditCommand::RippleDeleteRanges { .. })
+                | ("RippleDeleteClips", EditCommand::RippleDeleteClips { .. })
+                | ("AddTexts", EditCommand::AddTexts { .. })
+                | ("AddTextsAutoTrack", EditCommand::AddTextsAutoTrack { .. })
+                | ("AddCaptions", EditCommand::AddCaptions { .. })
+                | ("Link", EditCommand::Link { .. })
+                | ("Unlink", EditCommand::Unlink { .. })
+                | ("RemoveTracks", EditCommand::RemoveTracks { .. })
+                | ("SwapTracks", EditCommand::SwapTracks { .. })
+                | ("SwapClips", EditCommand::SwapClips { .. })
+                | ("InsertTrack", EditCommand::InsertTrack { .. })
+                | ("SetTrackProps", EditCommand::SetTrackProps { .. })
+                | ("CreateFolder", EditCommand::CreateFolder { .. })
+                | ("MoveToFolder", EditCommand::MoveToFolder { .. })
+                | ("RenameMedia", EditCommand::RenameMedia { .. })
+                | ("RenameFolder", EditCommand::RenameFolder { .. })
+                | ("DeleteMedia", EditCommand::DeleteMedia { .. })
+                | ("DeleteFolder", EditCommand::DeleteFolder { .. })
+                | ("SwapMedia", EditCommand::SwapMedia { .. })
+                | ("ResetTransform", EditCommand::ResetTransform { .. })
+                | (
+                    "SetTimelineSettings",
+                    EditCommand::SetTimelineSettings { .. }
+                )
+        )
+    }
+
+    fn assert_every_edit_request_maps_to_exact_edit_command() {
+        let cases = [
+            (
+                r#"{"type":"createNestedSequence","name":"Scene","clipIds":["c"]}"#,
+                "CreateNestedSequence",
+            ),
+            (
+                r#"{"type":"editNestedSequence","sequenceId":"s","command":{"type":"removeClips","clipIds":["c"]}}"#,
+                "EditNestedSequence",
+            ),
+            (
+                r#"{"type":"renameNestedSequence","sequenceId":"s","name":"Scene"}"#,
+                "RenameNestedSequence",
+            ),
+            (
+                r#"{"type":"dissolveNestedSequence","clipId":"c"}"#,
+                "DissolveNestedSequence",
+            ),
+            (r#"{"type":"addClips","entries":[]}"#, "AddClips"),
+            (
+                r#"{"type":"insertClips","trackIndex":0,"atFrame":0,"entries":[]}"#,
+                "InsertClips",
+            ),
+            (r#"{"type":"moveClips","moves":[]}"#, "MoveClips"),
+            (
+                r#"{"type":"duplicateClips","clipIds":[],"offsetFrames":0,"targetTrackIndexes":[]}"#,
+                "DuplicateClips",
+            ),
+            (r#"{"type":"removeClips","clipIds":[]}"#, "RemoveClips"),
+            (
+                r#"{"type":"splitClip","clipId":"c","atFrame":1}"#,
+                "SplitClip",
+            ),
+            (
+                r#"{"type":"freezeFrame","clipId":"c","atFrame":1,"durationFrames":1}"#,
+                "FreezeFrame",
+            ),
+            (r#"{"type":"trimClips","edits":[]}"#, "TrimClips"),
+            (
+                r#"{"type":"setClipProperties","clipIds":[],"properties":{}}"#,
+                "SetClipProperties",
+            ),
+            (
+                r#"{"type":"setKeyframes","clipId":"c","property":"opacity","payload":{"kind":"scalar","keyframes":[]}}"#,
+                "SetKeyframes",
+            ),
+            (
+                r#"{"type":"stampKeyframe","clipId":"c","property":"opacity","frame":1}"#,
+                "StampKeyframe",
+            ),
+            (
+                r#"{"type":"upsertKeyframe","clipId":"c","property":"opacity","frame":1,"value":{"kind":"scalar","value":0.5}}"#,
+                "UpsertKeyframe",
+            ),
+            (
+                r#"{"type":"removeKeyframe","clipId":"c","property":"opacity","frame":1}"#,
+                "RemoveKeyframe",
+            ),
+            (
+                r#"{"type":"moveKeyframe","clipId":"c","property":"opacity","fromFrame":1,"toFrame":2}"#,
+                "MoveKeyframe",
+            ),
+            (
+                r#"{"type":"setKeyframeInterpolation","clipId":"c","property":"opacity","frame":1,"interpolation":"hold"}"#,
+                "SetKeyframeInterpolation",
+            ),
+            (
+                r#"{"type":"setColorGrade","clipIds":[],"grade":null}"#,
+                "SetColorGrade",
+            ),
+            (r#"{"type":"setLut","clipIds":[],"lut":null}"#, "SetLut"),
+            (
+                r#"{"type":"setChromaKey","clipIds":[],"chromaKey":null}"#,
+                "SetChromaKey",
+            ),
+            (r#"{"type":"setMasks","clipIds":[],"masks":[]}"#, "SetMasks"),
+            (
+                r#"{"type":"setEffects","clipIds":[],"effects":[]}"#,
+                "SetEffects",
+            ),
+            (
+                r#"{"type":"setLoudnessNormalization","clipId":"c","normalization":null}"#,
+                "SetLoudnessNormalization",
+            ),
+            (
+                r#"{"type":"setAudioDenoise","clipId":"c","denoise":null}"#,
+                "SetAudioDenoise",
+            ),
+            (
+                r#"{"type":"applyStabilization","clipId":"c","solution":{"model":"opentake.motion-smoothing","modelVersion":1,"sourceIdentity":"asset","strength":1.0,"cropMargin":0.0,"keyframes":[{"frame":0,"translationX":0.0,"translationY":0.0,"rotationDegrees":0.0},{"frame":1,"translationX":0.0,"translationY":0.0,"rotationDegrees":0.0}]}}"#,
+                "ApplyStabilization",
+            ),
+            (
+                r#"{"type":"adjustStabilization","clipId":"c","strength":0.75,"cropMargin":0.02}"#,
+                "AdjustStabilization",
+            ),
+            (
+                r#"{"type":"resetStabilization","clipId":"c"}"#,
+                "ResetStabilization",
+            ),
+            (
+                r#"{"type":"setTransition","fromClipId":"a","toClipId":"b","kind":null,"durationFrames":1}"#,
+                "SetTransition",
+            ),
+            (
+                r#"{"type":"rippleDeleteRanges","trackIndex":0,"ranges":[]}"#,
+                "RippleDeleteRanges",
+            ),
+            (
+                r#"{"type":"rippleDeleteClips","clipIds":[]}"#,
+                "RippleDeleteClips",
+            ),
+            (r#"{"type":"addTexts","entries":[]}"#, "AddTexts"),
+            (
+                r#"{"type":"addTextsAutoTrack","entries":[]}"#,
+                "AddTextsAutoTrack",
+            ),
+            (r#"{"type":"addCaptions","entries":[]}"#, "AddCaptions"),
+            (r#"{"type":"link","clipIds":[]}"#, "Link"),
+            (r#"{"type":"unlink","clipIds":[]}"#, "Unlink"),
+            (
+                r#"{"type":"removeTracks","trackIndexes":[]}"#,
+                "RemoveTracks",
+            ),
+            (r#"{"type":"swapTracks","a":0,"b":1}"#, "SwapTracks"),
+            (
+                r#"{"type":"swapClips","clipA":"a","clipB":"b"}"#,
+                "SwapClips",
+            ),
+            (
+                r#"{"type":"insertTrack","kind":"video","at":0}"#,
+                "InsertTrack",
+            ),
+            (
+                r#"{"type":"setTrackProps","trackIndex":0,"muted":true}"#,
+                "SetTrackProps",
+            ),
+            (r#"{"type":"createFolder","name":"f"}"#, "CreateFolder"),
+            (
+                r#"{"type":"moveToFolder","assetIds":[],"folderId":null}"#,
+                "MoveToFolder",
+            ),
+            (r#"{"type":"renameMedia","entries":[]}"#, "RenameMedia"),
+            (r#"{"type":"renameFolder","entries":[]}"#, "RenameFolder"),
+            (r#"{"type":"deleteMedia","assetIds":[]}"#, "DeleteMedia"),
+            (r#"{"type":"deleteFolder","folderIds":[]}"#, "DeleteFolder"),
+            (
+                r#"{"type":"swapMedia","clipId":"c","mediaRef":"m"}"#,
+                "SwapMedia",
+            ),
+            (
+                r#"{"type":"resetTransform","clipIds":[]}"#,
+                "ResetTransform",
+            ),
+            (
+                r#"{"type":"setTimelineSettings","fps":24,"width":1920,"height":1080}"#,
+                "SetTimelineSettings",
+            ),
+        ];
+
+        assert_eq!(cases.len(), 51);
+        for (json, expected_route) in cases {
+            let mut hostile = serde_json::from_str::<serde_json::Value>(json).unwrap();
+            hostile
+                .as_object_mut()
+                .unwrap()
+                .insert("unexpected".to_string(), serde_json::json!(true));
+            assert!(
+                serde_json::from_value::<EditRequest>(hostile).is_err(),
+                "{expected_route} must reject unknown fields"
+            );
+
+            let request = serde_json::from_str::<EditRequest>(json)
+                .unwrap_or_else(|error| panic!("{expected_route} DTO failed: {error}"));
+            assert_eq!(request_route(&request), expected_route);
+            if expected_route == "FreezeFrame" {
+                assert!(request.into_command().is_err());
+            } else {
+                let command = request.into_command().expect("request maps to EditCommand");
+                assert!(
+                    command_matches_route(&command, expected_route),
+                    "{expected_route} mapped to {command:?}"
+                );
+            }
+        }
+    }
+
+    #[test]
+    fn every_frontend_edit_request_deserializes_to_intended_command() {
+        assert_every_edit_request_maps_to_exact_edit_command();
+    }
+
+    #[test]
+    fn every_edit_request_maps_to_exact_edit_command() {
+        assert_every_edit_request_maps_to_exact_edit_command();
+    }
+
     // Regression: the front end sends camelCase keys (clipIds/clipId/atFrame…).
     // serde's enum-level `rename_all` does NOT rename struct-variant fields, so
     // each variant needs its own `rename_all`; without it RemoveClips/SplitClip/
@@ -1418,6 +2089,29 @@ mod edit_request_serde_tests {
         }
     }
 
+    #[test]
+    fn deserializes_set_transition_pair_and_kind() {
+        let request: EditRequest = serde_json::from_str(
+            r#"{"type":"setTransition","fromClipId":"a","toClipId":"b","kind":"crossDissolve","durationFrames":15}"#,
+        )
+        .expect("setTransition camelCase");
+
+        match request.into_command().expect("setTransition command") {
+            EditCommand::SetTransition {
+                from_clip_id,
+                to_clip_id,
+                kind,
+                duration_frames,
+            } => {
+                assert_eq!(from_clip_id, "a");
+                assert_eq!(to_clip_id, "b");
+                assert_eq!(kind, Some(TransitionKind::CrossDissolve));
+                assert_eq!(duration_frames, 15);
+            }
+            other => panic!("expected SetTransition, got {other:?}"),
+        }
+    }
+
     #[test]
     fn deserializes_freeze_frame() {
         let request = serde_json::from_str::<EditRequest>(
@@ -1716,13 +2410,13 @@ mod edit_request_serde_tests {
         ));
 
         let effects = serde_json::from_str::<EditRequest>(
-            r#"{"type":"setEffects","clipIds":["clip-1"],"effects":[{"name":"gaussianBlur","params":{"radius":4.0}}]}"#,
+            r#"{"type":"setEffects","clipIds":["clip-1"],"effects":[{"name":"grayscale","params":{"amount":0.4}}]}"#,
         )
         .expect("setEffects camelCase");
         match effects.into_command().expect("setEffects command") {
             EditCommand::SetEffects { effects, .. } => {
-                assert_eq!(effects[0].name, "gaussianBlur");
-                assert_eq!(effects[0].param("radius", 0.0), 4.0);
+                assert_eq!(effects[0].name, "grayscale");
+                assert_eq!(effects[0].param("amount", 0.0), 0.4);
             }
             other => panic!("expected SetEffects, got {other:?}"),
         }
diff --git a/src-tauri/src/export.rs b/src-tauri/src/export.rs
index a3892167..d110fe34 100644
--- a/src-tauri/src/export.rs
+++ b/src-tauri/src/export.rs
@@ -15,6 +15,9 @@
 //!   produces the same video-only file as before.
 //! - Export renders at the **full** export resolution
 //!   ([`opentake_render::export_render_size`]), not the preview cap.
+//! - Image and Lottie sources materialize directly as content-hashed GPU
+//!   textures; Lottie uses the same Velato/Vello frame contract as preview and
+//!   playback, and any unsupported document fails the export explicitly.
 //! - **Progress + cancel** (mirrors upstream `Export/ExportService.swift`'s
 //!   200ms `AVAssetExportSession.progress` poll + cooperative cancel): the frame
 //!   loop emits a throttled `"export://progress"` Tauri event and checks a
@@ -29,7 +32,7 @@
 //! preview path in `render.rs` is not touched). A later refactor can hoist the
 //! shared projection into a `pub(crate)` helper once both paths are stable.
 
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::ffi::OsString;
 use std::fs::{File, OpenOptions};
 use std::io::{self, Seek, SeekFrom, Write};
@@ -45,25 +48,36 @@ use same_file::Handle as FileIdentity;
 use serde::{Deserialize, Serialize};
 use tauri::{AppHandle, Emitter, State};
 
+use crate::render::LottieMaterializer;
+
 use opentake_core::AppCore;
-use opentake_domain::{Clip, ClipType, MediaSource, TextStyle};
-use opentake_media::encode::{mix, ClipAudio, MIX_SAMPLE_RATE};
+use opentake_domain::{AudioDenoise, Clip, ClipType, LutReference, MediaSource, TextStyle};
+#[cfg(test)]
+use opentake_media::encode::ClipAudio;
+use opentake_media::encode::{mix, MIX_SAMPLE_RATE};
 use opentake_media::{
-    decode_frame_at, extract_pcm, extract_pcm_cancellable_with_progress, ExportPreset,
-    ExportResolution as EncodeResolution, FrameRequest, MediaCancelToken, PcmBuffer, PcmFormat,
+    decode_frame_at, extract_pcm, extract_pcm_cancellable_with_progress, interpolate_frame_pair,
+    ExportPreset, ExportResolution as EncodeResolution, FrameInterpolationFallback,
+    FrameInterpolationMode, FrameRequest, MediaCancelToken, PcmBuffer, PcmFormat,
     PcmProgressCallback, PcmSpec, RgbaFrame, VideoCodec, VideoEncoder,
 };
+use opentake_project::ProjectRoot;
+use opentake_render::gpu::compositor::{
+    TextureInterpolationConfig, TextureInterpolationFallback, TextureInterpolationMode,
+    TextureResolveRequest,
+};
 use opentake_render::gpu::texture::upload_rgba;
 use opentake_render::{
-    build_render_plan, export_render_size, Compositor, CosmicTextRasterizer, DecodedFrame,
-    ExportResolution as RenderResolution, GpuTexture, RenderDevice, SourceMetrics,
-    TextRasterRequest, TextRasterizer, TextureCache, TextureResolver, TextureSource,
+    export_render_size, try_build_render_plan, AudioClipPlan, Compositor, CosmicTextRasterizer,
+    DecodedFrame, ExportResolution as RenderResolution, GpuLutTexture, GpuTexture, RenderDevice,
+    SourceMetrics, TextRasterRequest, TextRasterizer, TextureCache, TextureResolver, TextureSource,
 };
 
 /// Per-frame texture cache size. Export advances monotonically, so video-frame
 /// hit rate is low; a small cache still helps text/image layers re-used across
 /// frames. Bounds VRAM during the export loop.
 const TEXTURE_CACHE_CAP: usize = 64;
+const AUDIO_STREAM_WINDOW_SAMPLES: usize = MIX_SAMPLE_RATE as usize * 2;
 
 /// Requested output codec, projected from the front-end.
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Deserialize)]
@@ -294,6 +308,7 @@ impl ExportGuard<'_> {
         }
     }
 
+    #[cfg(test)]
     pub(crate) fn cancel_token(&self) -> &MediaCancelToken {
         &self.cancel
     }
@@ -429,6 +444,7 @@ fn resolve_preset(
 /// Resolvable info for one media asset, projected from the manifest.
 struct MediaInfo {
     path: PathBuf,
+    source_fps: Option<f64>,
 }
 
 /// A text clip projected from the timeline, keyed by clip id.
@@ -442,28 +458,37 @@ struct TextInfo {
 /// auto-rotates on decode in this cut).
 struct ManifestMetrics {
     sizes: HashMap<String, (u32, u32)>,
+    straight_alpha: HashSet<String>,
 }
 
 impl SourceMetrics for ManifestMetrics {
     fn natural_size(&self, media_ref: &str) -> Option<(u32, u32)> {
         self.sizes.get(media_ref).copied()
     }
+
+    fn needs_premultiply(&self, media_ref: &str) -> bool {
+        self.straight_alpha.contains(media_ref)
+    }
 }
 
 /// `TextureResolver` that decodes a layer's pixels on demand via ffmpeg and
-/// uploads them to the GPU. Video keys per source-frame; images key once; text
-/// rasterizes its box; Lottie returns `None` (skipped) in this cut. Mirrors the
-/// preview resolver, but the decode box is the full export render size.
+/// uploads them to the GPU. Video keys per source-frame; image and Lottie keys
+/// include source content hashes; text rasterizes its box. Mirrors the preview
+/// resolver, but the decode box is the full export render size.
 struct MediaResolver<'d> {
     device: &'d opentake_render::wgpu::Device,
     queue: &'d opentake_render::wgpu::Queue,
-    cache: TextureCache,
+    cache: &'d mut TextureCache,
+    lottie: &'d mut LottieMaterializer,
     media: &'d HashMap<String, MediaInfo>,
     timeline_fps: i32,
     text: &'d HashMap<String, TextInfo>,
     text_rasterizer: &'d CosmicTextRasterizer,
     /// Decode/raster box for source frames (matches the export render size).
     render_box: (u32, u32),
+    project_root: Option<&'d ProjectRoot>,
+    lut_cache: &'d mut HashMap<String, Rc<GpuLutTexture>>,
+    materialization_error: Option<String>,
 }
 
 impl MediaResolver<'_> {
@@ -484,24 +509,116 @@ impl MediaResolver<'_> {
         let tex = upload_rgba(self.device, self.queue, &frame, false, Some("export-text"));
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_interpolated_video(
+        &mut self,
+        media_ref: &str,
+        source_frame: i64,
+        interpolation: TextureInterpolationConfig,
+    ) -> Option<Rc<GpuTexture>> {
+        let key = format!(
+            "vf:{media_ref}:{source_frame}:{:?}:{:.6}:{:.6}",
+            interpolation.mode, interpolation.source_fps, interpolation.target_fps
+        );
+        if let Some(tex) = self.cache.get(&key) {
+            return Some(tex);
+        }
+        let info = self.media.get(media_ref)?;
+        let source_fps = info.source_fps.unwrap_or(interpolation.source_fps);
+        if !source_fps.is_finite() || source_fps <= 0.0 {
+            return None;
+        }
+        let timestamp = source_frame.max(0) as f64 / interpolation.target_fps;
+        let source_position = timestamp * source_fps;
+        let first_index = source_position.floor().max(0.0) as i64;
+        let next_index = source_position.ceil().max(0.0) as i64;
+        let alpha = source_position - first_index as f64;
+        let decode = |index: i64| {
+            decode_frame_at(
+                &info.path,
+                &FrameRequest {
+                    time_secs: index as f64 / source_fps,
+                    max_size: self.render_box,
+                    tolerance_secs: 0.0,
+                    apply_rotation: true,
+                },
+            )
+            .ok()
+            .map(|(_, frame)| frame)
+        };
+        let first = decode(first_index)?;
+        let last = if next_index == first_index {
+            first.clone()
+        } else {
+            // A half-open media duration may not expose the mathematical next
+            // frame at the tail. Hold the last decodable endpoint instead of
+            // dropping the whole layer to black.
+            decode(next_index).unwrap_or_else(|| first.clone())
+        };
+        let requested = match interpolation.mode {
+            TextureInterpolationMode::Nearest => FrameInterpolationMode::Nearest,
+            TextureInterpolationMode::Blend => FrameInterpolationMode::Blend,
+            TextureInterpolationMode::OpticalFlow => FrameInterpolationMode::OpticalFlow,
+        };
+        let fallback = match interpolation.fallback {
+            TextureInterpolationFallback::Nearest => FrameInterpolationFallback::Nearest,
+            TextureInterpolationFallback::Blend => FrameInterpolationFallback::Blend,
+            TextureInterpolationFallback::Error => FrameInterpolationFallback::Error,
+        };
+        let frame = interpolate_frame_pair(&first, &last, alpha, requested, fallback, true)
+            .ok()?
+            .frame;
+        let decoded = DecodedFrame::new(frame.width, frame.height, frame.rgba, false);
+        let tex = upload_rgba(
+            self.device,
+            self.queue,
+            &decoded,
+            false,
+            Some("export-optical-flow"),
+        );
+        Some(self.cache.insert(key, tex))
+    }
 }
 
 impl TextureResolver for MediaResolver<'_> {
     fn resolve(&mut self, source: &TextureSource, source_frame: i64) -> Option<Rc<GpuTexture>> {
-        let (media_ref, key, is_image) = match source {
-            TextureSource::Decoded { media_ref } => {
-                (media_ref, format!("v:{media_ref}:{source_frame}"), false)
-            }
-            TextureSource::Image { media_ref } => (media_ref, format!("i:{media_ref}"), true),
+        let (media_ref, is_image) = match source {
+            TextureSource::Decoded { media_ref } => (media_ref, false),
+            TextureSource::Image { media_ref } => (media_ref, true),
             TextureSource::Text { clip_id } => return self.resolve_text(clip_id),
-            TextureSource::Lottie { .. } => return None,
+            TextureSource::Lottie { media_ref } => {
+                let info = self.media.get(media_ref)?;
+                return match self.lottie.resolve(
+                    self.device,
+                    self.queue,
+                    self.cache,
+                    &info.path,
+                    source_frame,
+                    self.render_box,
+                    "export-lottie",
+                ) {
+                    Ok(texture) => Some(texture),
+                    Err(error) => {
+                        eprintln!("[export] {error}");
+                        self.materialization_error = Some(error);
+                        None
+                    }
+                };
+            }
+        };
+
+        let info = self.media.get(media_ref)?;
+        let key = if is_image {
+            let content_hash = opentake_media::file_sha256(&info.path).ok()?;
+            format!("i:{content_hash}")
+        } else {
+            format!("v:{media_ref}:{source_frame}")
         };
 
         if let Some(tex) = self.cache.get(&key) {
             return Some(tex);
         }
 
-        let info = self.media.get(media_ref)?;
         let time_secs = if is_image {
             0.0
         } else {
@@ -522,29 +639,74 @@ impl TextureResolver for MediaResolver<'_> {
         let tex = upload_rgba(self.device, self.queue, &decoded, false, Some("export-src"));
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_with_interpolation(
+        &mut self,
+        request: TextureResolveRequest<'_>,
+    ) -> Option<Rc<GpuTexture>> {
+        match request.source {
+            TextureSource::Decoded { media_ref }
+                if request.interpolation.mode != TextureInterpolationMode::Nearest =>
+            {
+                self.resolve_interpolated_video(
+                    media_ref,
+                    request.source_frame,
+                    request.interpolation,
+                )
+            }
+            _ => self.resolve(request.source, request.source_frame),
+        }
+    }
+
+    fn resolve_lut(
+        &mut self,
+        reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, opentake_render::RenderError> {
+        if let Some(cached) = self.lut_cache.get(&reference.id) {
+            return Ok(Some(cached.clone()));
+        }
+        let resolved = crate::lut::resolve_project_lut(
+            self.project_root,
+            reference,
+            self.device,
+            self.queue,
+            "export-lut",
+        )?;
+        if let Some(texture) = &resolved {
+            self.lut_cache.insert(reference.id.clone(), texture.clone());
+        }
+        Ok(resolved)
+    }
 }
 
 /// Project the timeline's text clips (content + style + box) into the per-clip
 /// lookup the resolver rasterizes from. Keyed by clip id.
 fn project_text(timeline: &opentake_domain::Timeline) -> HashMap<String, TextInfo> {
     let mut text: HashMap<String, TextInfo> = HashMap::new();
-    for track in &timeline.tracks {
-        for clip in &track.clips {
-            if clip.media_type != ClipType::Text {
-                continue;
+    for candidate in std::iter::once(timeline).chain(
+        timeline
+            .nested_sequences
+            .iter()
+            .map(|sequence| &sequence.timeline),
+    ) {
+        for track in &candidate.tracks {
+            for clip in &track.clips {
+                if clip.media_type != ClipType::Text {
+                    continue;
+                }
+                let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
+                    continue;
+                };
+                let tl = clip.transform.top_left();
+                text.insert(
+                    clip.id.clone(),
+                    TextInfo {
+                        content: content.clone(),
+                        style: style.clone(),
+                        box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
+                    },
+                );
             }
-            let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
-                continue;
-            };
-            let tl = clip.transform.top_left();
-            text.insert(
-                clip.id.clone(),
-                TextInfo {
-                    content: content.clone(),
-                    style: style.clone(),
-                    box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
-                },
-            );
         }
     }
     text
@@ -571,7 +733,13 @@ fn project_media(
                 sizes.insert(entry.id.clone(), (w as u32, h as u32));
             }
         }
-        media.insert(entry.id.clone(), MediaInfo { path });
+        media.insert(
+            entry.id.clone(),
+            MediaInfo {
+                path,
+                source_fps: entry.source_fps,
+            },
+        );
     }
     (sizes, media)
 }
@@ -588,9 +756,9 @@ const AUDIO_DECODE_SPEC: PcmSpec = PcmSpec {
 pub(crate) type AudioExportProgress = Arc<dyn Fn(i32, i32) + Send + Sync>;
 
 pub(crate) const AUDIO_PROGRESS_TOTAL: i32 = 1_000;
-const AUDIO_DECODE_END: i32 = 800;
 const AUDIO_MIX_START: i32 = 850;
 const AUDIO_MIX_END: i32 = 980;
+#[cfg(test)]
 const AUDIO_WAV_START: i32 = AUDIO_MIX_END;
 const AUDIO_WAV_END: i32 = 990;
 const AUDIO_CANCEL_CHUNK_SAMPLES: usize = 8 * 1024;
@@ -672,13 +840,67 @@ fn retime_pcm_to_len_with_control(
 /// Returns `Ok(None)` when the clip contributes no audio (no media path, no
 /// audio track, zero-length window, or a fully-decoded-to-empty buffer). Decode
 /// failures other than "no audio track" propagate as `Err`.
-fn project_clip_audio(
-    clip: &Clip,
+trait AudioPlanLike {
+    fn clip(&self) -> &Clip;
+    fn volume_at(&self, frame: i32) -> f64;
+    fn true_peak_ceiling_dbtp(&self) -> Option<f64>;
+    fn audio_denoise(&self) -> Option<AudioDenoise>;
+}
+
+impl AudioPlanLike for Clip {
+    fn clip(&self) -> &Clip {
+        self
+    }
+
+    fn volume_at(&self, frame: i32) -> f64 {
+        Clip::volume_at(self, frame)
+    }
+
+    fn true_peak_ceiling_dbtp(&self) -> Option<f64> {
+        self.loudness_normalization
+            .map(|normalization| normalization.true_peak_ceiling_dbtp)
+    }
+
+    fn audio_denoise(&self) -> Option<AudioDenoise> {
+        self.audio_denoise
+    }
+}
+
+impl AudioPlanLike for AudioClipPlan {
+    fn clip(&self) -> &Clip {
+        &self.clip
+    }
+
+    fn volume_at(&self, frame: i32) -> f64 {
+        AudioClipPlan::volume_at(self, frame)
+    }
+
+    fn true_peak_ceiling_dbtp(&self) -> Option<f64> {
+        std::iter::once(&self.gain_clip)
+            .chain(self.compound_ancestors.iter())
+            .filter_map(|clip| {
+                clip.loudness_normalization
+                    .map(|normalization| normalization.true_peak_ceiling_dbtp)
+            })
+            .min_by(f64::total_cmp)
+    }
+
+    fn audio_denoise(&self) -> Option<AudioDenoise> {
+        std::iter::once(&self.gain_clip)
+            .chain(self.compound_ancestors.iter())
+            .find_map(|clip| clip.audio_denoise)
+    }
+}
+
+#[cfg(test)]
+fn project_clip_audio<T: AudioPlanLike>(
+    plan: &T,
     media: &HashMap<String, MediaInfo>,
     timeline_fps: i32,
     control: Option<&ExportControl>,
     decode_progress: Option<PcmProgressCallback>,
 ) -> Result<Option<ClipAudio>, String> {
+    let clip = plan.clip();
     if clip.duration_frames <= 0 || timeline_fps <= 0 {
         return Ok(None);
     }
@@ -718,6 +940,7 @@ fn project_clip_audio(
     let target_len = ((clip.duration_frames as f64) / timeline_fps as f64 * MIX_SAMPLE_RATE as f64)
         .round() as usize;
     let samples = retime_pcm_to_len_with_control(&pcm.samples_f32, target_len, control)?;
+    let samples = apply_export_denoise(&samples, 1, plan.audio_denoise(), control)?;
     if samples.is_empty() {
         return Ok(None);
     }
@@ -739,7 +962,7 @@ fn project_clip_audio(
             }
         }
         let tl_frame = clip.start_frame + (k as f64 / samples_per_frame).floor() as i32;
-        let g = clip.volume_at(tl_frame) as f32;
+        let g = plan.volume_at(tl_frame) as f32;
         if (g - 1.0).abs() > f32::EPSILON {
             all_unity = false;
         }
@@ -753,66 +976,30 @@ fn project_clip_audio(
     }))
 }
 
-fn mix_clips_with_control(
-    clips: &[ClipAudio],
-    control: &ExportControl,
-    progress: Option<&dyn Fn(usize, usize)>,
+fn apply_export_denoise(
+    samples: &[f32],
+    channels: usize,
+    config: Option<AudioDenoise>,
+    control: Option<&ExportControl>,
 ) -> Result<Vec<f32>, String> {
-    for (index, clip) in clips.iter().enumerate() {
-        if !clip.gains.is_empty() && clip.gains.len() != clip.samples.len() {
-            return Err(format!(
-                "audio mix failed: clip {index}: gains len {} != samples len {}",
-                clip.gains.len(),
-                clip.samples.len()
-            ));
-        }
-    }
-    let total = clips
-        .iter()
-        .map(|clip| clip.start_sample + clip.samples.len())
-        .max()
-        .unwrap_or(0);
-    let work_total = clips
-        .iter()
-        .map(|clip| clip.samples.len())
-        .sum::<usize>()
-        .saturating_add(total)
-        .max(1);
-    let mut completed = 0_usize;
-    let mut mixed = vec![0.0_f32; total];
-
-    for clip in clips {
-        for (offset, &sample) in clip.samples.iter().enumerate() {
-            if completed.is_multiple_of(AUDIO_CANCEL_CHUNK_SAMPLES) {
-                check_audio_cancel(control)?;
-                if let Some(report) = progress {
-                    report(completed, work_total);
-                }
-            }
-            let gain = if clip.gains.is_empty() {
-                1.0
-            } else {
-                clip.gains[offset]
-            };
-            mixed[clip.start_sample + offset] += sample * gain;
-            completed += 1;
-        }
-    }
-    for sample in &mut mixed {
-        if completed.is_multiple_of(AUDIO_CANCEL_CHUNK_SAMPLES) {
-            check_audio_cancel(control)?;
-            if let Some(report) = progress {
-                report(completed, work_total);
-            }
-        }
-        *sample = sample.clamp(-1.0, 1.0);
-        completed += 1;
-    }
-    check_audio_cancel(control)?;
-    if let Some(report) = progress {
-        report(work_total, work_total);
-    }
-    Ok(mixed)
+    let Some(config) = config else {
+        return Ok(samples.to_vec());
+    };
+    let cancel = control
+        .map(ExportControl::media_cancel_token)
+        .unwrap_or_default();
+    opentake_media::analysis::denoise_interleaved(
+        samples,
+        channels,
+        MIX_SAMPLE_RATE,
+        config,
+        &cancel,
+        None,
+    )
+    .map_err(|error| match error {
+        opentake_media::analysis::DenoiseError::Cancelled => CANCELLED_SENTINEL.to_string(),
+        other => format!("audio denoise failed: {other}"),
+    })
 }
 
 /// Decode + mix every audio-bearing clip on the timeline into one mono buffer.
@@ -821,94 +1008,264 @@ fn mix_clips_with_control(
 /// each through [`project_clip_audio`], and linearly mixes the lot. Returns
 /// `None` when nothing contributes audio (→ the caller keeps the video-only
 /// output). Errors surface decode/mix failures to the front-end.
+#[cfg(test)]
 fn mix_timeline_audio(
     timeline: &opentake_domain::Timeline,
     media: &HashMap<String, MediaInfo>,
     control: Option<&ExportControl>,
     on_progress: Option<AudioExportProgress>,
 ) -> Result<Option<PcmBuffer>, String> {
-    let eligible_count = timeline
+    let clips = timeline
         .tracks
         .iter()
         .filter(|track| !track.muted)
         .flat_map(|track| &track.clips)
         .filter(|clip| matches!(clip.media_type, ClipType::Audio | ClipType::Video))
-        .count();
-    let mut clips_audio: Vec<ClipAudio> = Vec::new();
-    let mut eligible_index = 0_usize;
-    for track in &timeline.tracks {
-        if track.muted {
+        .cloned()
+        .collect::<Vec<_>>();
+    let mut samples_f32 = Vec::new();
+    let has_audio = stream_flattened_audio(
+        &clips,
+        media,
+        AudioStreamOptions {
+            timeline_fps: timeline.fps,
+            start_frame: 0,
+            end_frame: timeline.total_frames(),
+            control,
+            on_progress,
+        },
+        |samples| {
+            samples_f32
+                .try_reserve(samples.len())
+                .map_err(|error| format!("audio output allocation failed: {error}"))?;
+            samples_f32.extend_from_slice(samples);
+            Ok(())
+        },
+    )?;
+    Ok(has_audio.then_some(PcmBuffer {
+        spec: AUDIO_DECODE_SPEC,
+        samples_f32,
+    }))
+}
+
+struct AudioStreamOptions<'a> {
+    timeline_fps: i32,
+    start_frame: i32,
+    end_frame: i32,
+    control: Option<&'a ExportControl>,
+    on_progress: Option<AudioExportProgress>,
+}
+
+fn stream_flattened_audio<T: AudioPlanLike>(
+    clips: &[T],
+    media: &HashMap<String, MediaInfo>,
+    options: AudioStreamOptions<'_>,
+    mut emit: impl FnMut(&[f32]) -> Result<(), String>,
+) -> Result<bool, String> {
+    let AudioStreamOptions {
+        timeline_fps,
+        start_frame,
+        end_frame,
+        control,
+        on_progress,
+    } = options;
+    if timeline_fps <= 0 || start_frame >= end_frame {
+        return Ok(false);
+    }
+    let mut audible_media = HashSet::new();
+    for plan in clips {
+        let clip = plan.clip();
+        let clip_end = clip.start_frame.saturating_add(clip.duration_frames);
+        if clip.duration_frames <= 0 || clip_end <= start_frame || clip.start_frame >= end_frame {
             continue;
         }
-        for clip in &track.clips {
-            // Only audio and video clips carry sound; text/image/lottie don't.
-            if clip.media_type != ClipType::Audio && clip.media_type != ClipType::Video {
-                continue;
-            }
-            let decode_progress = match (control, &on_progress) {
-                (Some(_), Some(emit)) => {
-                    let emit = Arc::clone(emit);
-                    let index = eligible_index;
-                    Some(Arc::new(move |done: usize, total: usize| {
-                        let total = total.max(1);
-                        let numerator = index
-                            .saturating_mul(AUDIO_DECODE_END as usize)
-                            .saturating_mul(total)
-                            .saturating_add(
-                                done.min(total).saturating_mul(AUDIO_DECODE_END as usize),
-                            );
-                        let denominator = eligible_count.saturating_mul(total).max(1);
-                        emit((numerator / denominator) as i32, AUDIO_PROGRESS_TOTAL);
-                    }) as PcmProgressCallback)
-                }
-                _ => None,
-            };
-            eligible_index += 1;
-            if let Some(ca) =
-                project_clip_audio(clip, media, timeline.fps, control, decode_progress)?
-            {
-                clips_audio.push(ca);
-            }
+        let Some(info) = media.get(&clip.media_ref) else {
+            continue;
+        };
+        let metadata = opentake_media::probe(&info.path)
+            .map_err(|error| format!("audio probe failed for {}: {error}", clip.media_ref))?;
+        if metadata.has_audio {
+            audible_media.insert(clip.media_ref.clone());
         }
     }
-    if clips_audio.is_empty() {
-        return Ok(None);
+    if audible_media.is_empty() {
+        return Ok(false);
     }
-    let mixed = match control {
-        Some(control) => {
-            if let Some(emit) = &on_progress {
-                emit(AUDIO_MIX_START, AUDIO_PROGRESS_TOTAL);
+
+    let sample_at_frame = |frame: i32| {
+        ((frame.max(0) as f64 / timeline_fps as f64) * MIX_SAMPLE_RATE as f64).round() as usize
+    };
+    let range_start = sample_at_frame(start_frame);
+    let range_end = sample_at_frame(end_frame);
+    let total_samples = range_end.saturating_sub(range_start);
+    let true_peak_ceiling_dbtp = clips
+        .iter()
+        .filter_map(AudioPlanLike::true_peak_ceiling_dbtp)
+        .min_by(f64::total_cmp);
+    let cancel = control
+        .map(ExportControl::media_cancel_token)
+        .unwrap_or_default();
+
+    for relative_start in (0..total_samples).step_by(AUDIO_STREAM_WINDOW_SAMPLES) {
+        if let Some(control) = control {
+            check_audio_cancel(control)?;
+        }
+        let window_len = AUDIO_STREAM_WINDOW_SAMPLES.min(total_samples - relative_start);
+        let window_start = range_start.saturating_add(relative_start);
+        let window_end = window_start.saturating_add(window_len);
+        let mut mixed = vec![0.0_f32; window_len];
+        for plan in clips {
+            let clip = plan.clip();
+            if !audible_media.contains(&clip.media_ref) || clip.duration_frames <= 0 {
+                continue;
+            }
+            let clip_start = sample_at_frame(clip.start_frame);
+            let clip_end = sample_at_frame(clip.start_frame.saturating_add(clip.duration_frames));
+            let overlap_start = window_start.max(clip_start);
+            let overlap_end = window_end.min(clip_end);
+            if overlap_start >= overlap_end || clip_end <= clip_start {
+                continue;
             }
-            let mix_progress = |done: usize, total: usize| {
-                if let Some(emit) = &on_progress {
-                    let span = (AUDIO_MIX_END - AUDIO_MIX_START) as usize;
-                    let mapped = AUDIO_MIX_START
-                        + (done.min(total.max(1)).saturating_mul(span) / total.max(1)) as i32;
-                    emit(mapped, AUDIO_PROGRESS_TOTAL);
+            let Some(info) = media.get(&clip.media_ref) else {
+                continue;
+            };
+            let Some((source_lo, source_hi)) = clip_source_window_secs(clip, timeline_fps) else {
+                continue;
+            };
+            let source_span = source_hi - source_lo;
+            let relative_lo = (overlap_start - clip_start) as f64 / (clip_end - clip_start) as f64;
+            let relative_hi = (overlap_end - clip_start) as f64 / (clip_end - clip_start) as f64;
+            let source_range = (
+                source_lo + source_span * relative_lo,
+                source_lo + source_span * relative_hi,
+            );
+            let decoded = match control {
+                Some(control) => decode_pcm_with_export_control(
+                    control,
+                    &info.path,
+                    Some(source_range),
+                    None,
+                    extract_pcm_cancellable_with_progress,
+                ),
+                None => extract_pcm(&info.path, &AUDIO_DECODE_SPEC, Some(source_range)),
+            };
+            let pcm = match decoded {
+                Ok(pcm) => pcm,
+                Err(opentake_media::MediaError::NoTrack(_, _)) => continue,
+                Err(opentake_media::MediaError::Cancelled) => {
+                    return Err(CANCELLED_SENTINEL.to_string());
+                }
+                Err(error) => {
+                    return Err(format!(
+                        "audio decode failed for {}: {error}",
+                        clip.media_ref
+                    ));
                 }
             };
-            mix_clips_with_control(&clips_audio, control, Some(&mix_progress))?
+            let target_len = overlap_end - overlap_start;
+            let retimed = retime_pcm_to_len_with_control(&pcm.samples_f32, target_len, control)?;
+            let processed = apply_export_denoise(&retimed, 1, plan.audio_denoise(), control)?;
+            let output_start = overlap_start - window_start;
+            for (offset, sample) in processed.into_iter().take(target_len).enumerate() {
+                if offset.is_multiple_of(AUDIO_CANCEL_CHUNK_SAMPLES) {
+                    if let Some(control) = control {
+                        check_audio_cancel(control)?;
+                    }
+                }
+                let absolute_sample = overlap_start.saturating_add(offset);
+                let timeline_frame = ((absolute_sample as f64 / MIX_SAMPLE_RATE as f64)
+                    * timeline_fps as f64)
+                    .floor() as i32;
+                mixed[output_start + offset] += sample * plan.volume_at(timeline_frame) as f32;
+            }
+        }
+        for sample in &mut mixed {
+            *sample = sample.clamp(-1.0, 1.0);
+        }
+        mix::apply_true_peak_ceiling(&mut mixed, true_peak_ceiling_dbtp);
+        emit(&mixed)?;
+        if let Some(report) = &on_progress {
+            let completed = relative_start.saturating_add(window_len);
+            let span = (AUDIO_MIX_END - AUDIO_MIX_START) as usize;
+            let mapped =
+                AUDIO_MIX_START + (completed.saturating_mul(span) / total_samples.max(1)) as i32;
+            report(mapped, AUDIO_PROGRESS_TOTAL);
+        }
+        if cancel.checkpoint() {
+            return Err(CANCELLED_SENTINEL.to_string());
         }
-        None => mix::mix_clips(&clips_audio).map_err(|e| format!("audio mix failed: {e}"))?,
-    };
-    if mixed.is_empty() {
-        return Ok(None);
     }
-    Ok(Some(PcmBuffer {
-        spec: AUDIO_DECODE_SPEC,
-        samples_f32: mixed,
-    }))
+    Ok(true)
 }
 
-pub(crate) fn mix_timeline_audio_for_manifest_with_control(
+/// Mix a timeline in bounded windows and append each window directly to a WAV.
+///
+/// The output header is written lazily after the audio preflight succeeds, so
+/// callers can distinguish a silent timeline without materializing a full PCM
+/// buffer or leaving a header-only file behind.
+pub(crate) fn write_timeline_audio_wav_for_manifest_with_control(
     timeline: &opentake_domain::Timeline,
     manifest: &opentake_domain::MediaManifest,
     project_dir: &Option<PathBuf>,
+    file: &mut File,
     control: &ExportControl,
     on_progress: Option<AudioExportProgress>,
-) -> Result<Option<PcmBuffer>, String> {
+) -> Result<Option<usize>, String> {
     let (_sizes, media) = project_media(manifest, project_dir);
-    mix_timeline_audio(timeline, &media, Some(control), on_progress)
+    let clips = timeline
+        .tracks
+        .iter()
+        .filter(|track| !track.muted)
+        .flat_map(|track| &track.clips)
+        .filter(|clip| matches!(clip.media_type, ClipType::Audio | ClipType::Video))
+        .cloned()
+        .collect::<Vec<_>>();
+    let end_frame = timeline.total_frames();
+    let expected_samples = if timeline.fps > 0 {
+        ((end_frame.max(0) as f64 / timeline.fps as f64) * MIX_SAMPLE_RATE as f64).round() as usize
+    } else {
+        0
+    };
+    let mut written_samples = 0_usize;
+    let cancel = control.media_cancel_token();
+    let has_audio = stream_flattened_audio(
+        &clips,
+        &media,
+        AudioStreamOptions {
+            timeline_fps: timeline.fps,
+            start_frame: 0,
+            end_frame,
+            control: Some(control),
+            on_progress: on_progress.clone(),
+        },
+        |samples| {
+            if written_samples == 0 {
+                write_wav_header(file, expected_samples, MIX_SAMPLE_RATE)?;
+            }
+            if cancel.checkpoint() {
+                return Err(CANCELLED_SENTINEL.to_string());
+            }
+            let data = opentake_media::encode::mono_f32_to_s16le(samples);
+            file.write_all(&data)
+                .map_err(|error| format!("write wav samples: {error}"))?;
+            written_samples = written_samples.saturating_add(samples.len());
+            Ok(())
+        },
+    )?;
+    if !has_audio {
+        return Ok(None);
+    }
+    if written_samples != expected_samples {
+        return Err(format!(
+            "WAV sample count mismatch: wrote {written_samples}, expected {expected_samples}"
+        ));
+    }
+    file.flush()
+        .map_err(|error| format!("flush wav output: {error}"))?;
+    if let Some(report) = &on_progress {
+        report(AUDIO_WAV_END, AUDIO_PROGRESS_TOTAL);
+    }
+    Ok(Some(written_samples))
 }
 
 /// `export_video`: render the whole timeline to a video file on disk.
@@ -1019,14 +1376,29 @@ pub(crate) fn run_export_with_control(
 
     let text = project_text(timeline);
     let (sizes, media) = project_media(manifest, project_dir);
+    let straight_alpha = manifest
+        .entries
+        .iter()
+        .filter(|entry| entry.carries_straight_alpha())
+        .map(|entry| entry.id.clone())
+        .collect();
 
     let render_size = export_render_size(
         (timeline.width, timeline.height),
         req.quality.render_resolution(),
     );
 
-    let metrics = ManifestMetrics { sizes };
-    let plan = build_render_plan(timeline, render_size, &metrics);
+    let metrics = ManifestMetrics {
+        sizes,
+        straight_alpha,
+    };
+    let plan = try_build_render_plan(timeline, render_size, &metrics)
+        .map_err(|error| format!("invalid timeline graph: {error}"))?;
+    let project_root = project_dir
+        .as_ref()
+        .map(ProjectRoot::open)
+        .transpose()
+        .map_err(|error| format!("open project LUT storage: {error}"))?;
 
     // Acquire the GPU device + compositor for this export. Unlike the preview
     // (which caches the context in Tauri state for repeated scrubs), an export is
@@ -1069,6 +1441,9 @@ pub(crate) fn run_export_with_control(
     let range_total = end_frame - start_frame;
 
     let mut last_progress_emit = Instant::now();
+    let mut lut_cache = HashMap::new();
+    let mut texture_cache = TextureCache::new(TEXTURE_CACHE_CAP);
+    let mut lottie = LottieMaterializer::new();
     for f in start_frame..end_frame {
         if control.is_some_and(|c| c.is_cancelled())
             || external_cancel
@@ -1091,22 +1466,43 @@ pub(crate) fn run_export_with_control(
         let mut resolver = MediaResolver {
             device: &dev.device,
             queue: &dev.queue,
-            cache: TextureCache::new(TEXTURE_CACHE_CAP),
+            cache: &mut texture_cache,
+            lottie: &mut lottie,
             media: &media,
             timeline_fps: plan.fps,
             text: &text,
             text_rasterizer: &text_rasterizer,
             render_box: (render_size.width, render_size.height),
+            project_root: project_root.as_ref(),
+            lut_cache: &mut lut_cache,
+            materialization_error: None,
         };
+        let interpolation = TextureInterpolationConfig::new(
+            plan.fps as f64,
+            plan.fps as f64,
+            TextureInterpolationMode::OpticalFlow,
+            TextureInterpolationFallback::Blend,
+        )
+        .map_err(str::to_string)?;
         let composite = compositor
-            .render_to_rgba(
+            .render_to_rgba_with_interpolation(
                 &dev.device,
                 &dev.queue,
                 render_size,
                 &frame_plan,
                 &mut resolver,
+                interpolation,
             )
             .map_err(|e| format!("composite render failed at frame {f}: {e}"))?;
+        if let Some(error) = resolver.materialization_error.take() {
+            encoder.abort();
+            if !reserved_output {
+                let _ = std::fs::remove_file(&out_path);
+            }
+            return Err(format!(
+                "Lottie materialization failed at frame {f}: {error}"
+            ));
+        }
         encoder
             .push_frame(&RgbaFrame::new(
                 composite.width,
@@ -1131,8 +1527,9 @@ pub(crate) fn run_export_with_control(
         }
     }
 
-    // Decode + linearly mix every audio-bearing clip, then hand the mixed PCM to
-    // the encoder so `finish` mux's it into the container. No audio → video-only.
+    // Decode + linearly mix every audio-bearing clip in bounded windows, then
+    // append each window to the encoder's private PCM spool. `finish` muxes that
+    // file into the container; no audio keeps the output video-only.
     let audio_progress = on_progress.as_ref().map(|emit| {
         let emit = Arc::clone(emit);
         Arc::new(move |done: i32, total: i32| {
@@ -1142,20 +1539,25 @@ pub(crate) fn run_export_with_control(
             emit(mapped, AUDIO_PROGRESS_TOTAL);
         }) as AudioExportProgress
     });
-    let mixed_audio = mix_timeline_audio(timeline, &media, control, audio_progress)?;
-    let mut has_audio = false;
-    if let Some(pcm) = mixed_audio {
-        // Once any audio overlaps the exported interval, pad its trailing
-        // silence to the exact video duration. The muxer uses `-shortest`, so
-        // this keeps the completed container's frame_count/fps duration true.
-        let pcm = slice_pcm(pcm, start_frame, end_frame, plan.fps);
-        has_audio = !pcm.samples_f32.is_empty();
-        encoder.push_audio(pcm);
-    }
-
     let cancel = control
         .map(ExportControl::media_cancel_token)
         .unwrap_or_default();
+    let has_audio = stream_flattened_audio(
+        &plan.audio_clips,
+        &media,
+        AudioStreamOptions {
+            timeline_fps: plan.fps,
+            start_frame,
+            end_frame,
+            control,
+            on_progress: audio_progress,
+        },
+        |samples| {
+            encoder
+                .push_audio_chunk(AUDIO_DECODE_SPEC, samples, &cancel)
+                .map_err(|error| format!("audio spool failed: {error}"))
+        },
+    )?;
     let finalize_progress = on_progress.as_ref().map(|emit| {
         let emit = Arc::clone(emit);
         move |done: usize, total: usize| {
@@ -1213,6 +1615,7 @@ fn completion_progress(defer_completion: bool) -> i32 {
     }
 }
 
+#[cfg(test)]
 fn slice_pcm(pcm: PcmBuffer, start_frame: i32, end_frame: i32, fps: i32) -> PcmBuffer {
     if fps <= 0 || start_frame >= end_frame {
         return PcmBuffer {
@@ -1258,6 +1661,7 @@ pub(crate) fn write_wav_s16le(samples: &[f32], sample_rate: u32, out: &Path) ->
     result
 }
 
+#[cfg(test)]
 pub(crate) fn write_wav_s16le_cancellable_to_file(
     samples: &[f32],
     sample_rate: u32,
@@ -1266,37 +1670,12 @@ pub(crate) fn write_wav_s16le_cancellable_to_file(
     on_progress: Option<&dyn Fn(i32, i32)>,
     checkpoint_hook: Option<&dyn Fn(usize)>,
 ) -> Result<(), String> {
-    let data_bytes = samples
-        .len()
-        .checked_mul(2)
-        .ok_or_else(|| "wav output is too large".to_string())?;
-    let data_len = u32::try_from(data_bytes).map_err(|_| "wav output is too large".to_string())?;
-    let chunk_size = 36 + data_len;
-    let mut header = Vec::with_capacity(44);
-    header.extend_from_slice(b"RIFF");
-    header.extend_from_slice(&chunk_size.to_le_bytes());
-    header.extend_from_slice(b"WAVE");
-    header.extend_from_slice(b"fmt ");
-    header.extend_from_slice(&16u32.to_le_bytes());
-    header.extend_from_slice(&1u16.to_le_bytes());
-    header.extend_from_slice(&1u16.to_le_bytes());
-    header.extend_from_slice(&sample_rate.to_le_bytes());
-    header.extend_from_slice(&(sample_rate * 2).to_le_bytes());
-    header.extend_from_slice(&2u16.to_le_bytes());
-    header.extend_from_slice(&16u16.to_le_bytes());
-    header.extend_from_slice(b"data");
-    header.extend_from_slice(&data_len.to_le_bytes());
+    write_wav_header(file, samples.len(), sample_rate)?;
 
     (|| {
         if cancel.checkpoint() {
             return Err(CANCELLED_SENTINEL.to_string());
         }
-        file.set_len(0)
-            .map_err(|error| format!("truncate WAV output: {error}"))?;
-        file.seek(SeekFrom::Start(0))
-            .map_err(|error| format!("seek WAV output: {error}"))?;
-        file.write_all(&header)
-            .map_err(|error| format!("write wav header: {error}"))?;
         for (chunk_index, chunk) in samples.chunks(AUDIO_CANCEL_CHUNK_SAMPLES).enumerate() {
             let done = chunk_index.saturating_mul(AUDIO_CANCEL_CHUNK_SAMPLES);
             if let Some(hook) = checkpoint_hook {
@@ -1325,6 +1704,35 @@ pub(crate) fn write_wav_s16le_cancellable_to_file(
     })()
 }
 
+fn write_wav_header(file: &mut File, sample_count: usize, sample_rate: u32) -> Result<(), String> {
+    let data_bytes = sample_count
+        .checked_mul(2)
+        .ok_or_else(|| "wav output is too large".to_string())?;
+    let data_len = u32::try_from(data_bytes).map_err(|_| "wav output is too large".to_string())?;
+    let chunk_size = 36 + data_len;
+    let mut header = Vec::with_capacity(44);
+    header.extend_from_slice(b"RIFF");
+    header.extend_from_slice(&chunk_size.to_le_bytes());
+    header.extend_from_slice(b"WAVE");
+    header.extend_from_slice(b"fmt ");
+    header.extend_from_slice(&16u32.to_le_bytes());
+    header.extend_from_slice(&1u16.to_le_bytes());
+    header.extend_from_slice(&1u16.to_le_bytes());
+    header.extend_from_slice(&sample_rate.to_le_bytes());
+    header.extend_from_slice(&(sample_rate * 2).to_le_bytes());
+    header.extend_from_slice(&2u16.to_le_bytes());
+    header.extend_from_slice(&16u16.to_le_bytes());
+    header.extend_from_slice(b"data");
+    header.extend_from_slice(&data_len.to_le_bytes());
+
+    file.set_len(0)
+        .map_err(|error| format!("truncate WAV output: {error}"))?;
+    file.seek(SeekFrom::Start(0))
+        .map_err(|error| format!("seek WAV output: {error}"))?;
+    file.write_all(&header)
+        .map_err(|error| format!("write wav header: {error}"))
+}
+
 fn metadata_is_symlink_or_reparse(metadata: &std::fs::Metadata) -> bool {
     if metadata.file_type().is_symlink() {
         return true;
@@ -2061,6 +2469,27 @@ mod tests {
     use std::fs;
     use std::path::Path;
 
+    #[test]
+    fn denoise_export_uses_shared_processing_owner() {
+        let config = opentake_domain::AudioDenoise {
+            mode: opentake_domain::DenoiseMode::Voice,
+            strength: 0.8,
+            preview_enabled: false,
+        };
+        let input = vec![0.2, -0.1, 0.15, -0.05, 0.1, 0.0, 0.05, 0.05];
+        let exported = apply_export_denoise(&input, 1, Some(config), None).expect("export denoise");
+        let shared = opentake_media::analysis::denoise_interleaved(
+            &input,
+            1,
+            MIX_SAMPLE_RATE,
+            config,
+            &MediaCancelToken::new(),
+            None,
+        )
+        .expect("shared denoise");
+        assert_eq!(exported, shared);
+    }
+
     fn unknown_core(root: &Path) -> AppCore {
         let bundle = root.join("Unknown.opentake");
         let project = opentake_project::Project::new(&bundle);
@@ -2906,6 +3335,7 @@ mod tests {
             "asset-1".into(),
             MediaInfo {
                 path: PathBuf::from("/nonexistent.wav"),
+                source_fps: None,
             },
         );
         // duration 0 short-circuits before any decode is attempted.
@@ -2946,6 +3376,7 @@ mod tests {
             "asset-1".into(),
             MediaInfo {
                 path: PathBuf::from("/nonexistent.wav"),
+                source_fps: None,
             },
         );
         assert!(mix_timeline_audio(&tl, &media, None, None)
diff --git a/src-tauri/src/feedback.rs b/src-tauri/src/feedback.rs
new file mode 100644
index 00000000..e67c9d10
--- /dev/null
+++ b/src-tauri/src/feedback.rs
@@ -0,0 +1,266 @@
+//! Privacy-bounded feedback submission.
+//!
+//! The app stays offline unless an operator explicitly configures an HTTPS
+//! endpoint through `OPENTAKE_FEEDBACK_ENDPOINT`. Every request is built through
+//! [`FeedbackSubmission`], which attaches version metadata and serializes only
+//! allow-listed feedback fields.
+
+use std::fmt;
+use std::process::Command;
+use std::time::Duration;
+
+use serde::{Deserialize, Serialize};
+use tauri::State;
+
+const MAX_MESSAGE_CHARS: usize = 10_000;
+const MAX_EMAIL_CHARS: usize = 320;
+const MAX_SCREENSHOT_BASE64_CHARS: usize = 12 * 1024 * 1024;
+const ENDPOINT_ENV: &str = "OPENTAKE_FEEDBACK_ENDPOINT";
+
+#[derive(Clone, Deserialize)]
+#[serde(rename_all = "camelCase", deny_unknown_fields)]
+pub struct FeedbackDraft {
+    pub message: String,
+    pub email: Option<String>,
+    pub may_contact: bool,
+    pub screenshot_png_base64: Option<String>,
+}
+
+impl fmt::Debug for FeedbackDraft {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("FeedbackDraft")
+            .field("message", &"[REDACTED]")
+            .field("email", &self.email.as_ref().map(|_| "[REDACTED]"))
+            .field("may_contact", &(self.may_contact && self.email.is_some()))
+            .field(
+                "screenshot_png_base64",
+                &self.screenshot_png_base64.as_ref().map(|_| "[REDACTED]"),
+            )
+            .finish()
+    }
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct FeedbackSubmission {
+    message: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    email: Option<String>,
+    may_contact: bool,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    screenshot_png_base64: Option<String>,
+    app_version: String,
+    os_version: String,
+}
+
+impl fmt::Debug for FeedbackSubmission {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("FeedbackSubmission")
+            .field("message", &"[REDACTED]")
+            .field("email", &self.email.as_ref().map(|_| "[REDACTED]"))
+            .field("may_contact", &self.may_contact)
+            .field(
+                "screenshot_png_base64",
+                &self.screenshot_png_base64.as_ref().map(|_| "[REDACTED]"),
+            )
+            .field("app_version", &self.app_version)
+            .field("os_version", &self.os_version)
+            .finish()
+    }
+}
+
+impl FeedbackSubmission {
+    pub fn from_draft_with_versions(
+        draft: FeedbackDraft,
+        package_version: Option<&str>,
+        build_version: Option<&str>,
+        os_version: Option<&str>,
+    ) -> Result<Self, String> {
+        let original_message_chars = draft.message.chars().count();
+        let message = draft.message.trim().to_owned();
+        if message.is_empty() {
+            return Err("feedback message must not be empty".into());
+        }
+        if original_message_chars > MAX_MESSAGE_CHARS {
+            return Err(format!(
+                "feedback message must not exceed {MAX_MESSAGE_CHARS} characters"
+            ));
+        }
+
+        let email = draft
+            .email
+            .map(|value| value.trim().to_owned())
+            .filter(|value| !value.is_empty());
+        if email
+            .as_ref()
+            .is_some_and(|value| value.chars().count() > MAX_EMAIL_CHARS)
+        {
+            return Err(format!(
+                "feedback email must not exceed {MAX_EMAIL_CHARS} characters"
+            ));
+        }
+        if draft
+            .screenshot_png_base64
+            .as_ref()
+            .is_some_and(|value| value.len() > MAX_SCREENSHOT_BASE64_CHARS)
+        {
+            return Err("feedback screenshot is too large".into());
+        }
+
+        let package_version = non_empty_or(package_version, "?");
+        let build_version = non_empty_or(build_version, "?");
+        let os_version = os_version
+            .and_then(normalize_os_version)
+            .unwrap_or_else(|| "?.?.?".into());
+        let may_contact = draft.may_contact && email.is_some();
+
+        Ok(Self {
+            message,
+            email,
+            may_contact,
+            screenshot_png_base64: draft.screenshot_png_base64,
+            app_version: format!("{package_version} ({build_version})"),
+            os_version,
+        })
+    }
+
+    fn from_runtime(draft: FeedbackDraft) -> Result<Self, String> {
+        Self::from_draft_with_versions(
+            draft,
+            Some(env!("CARGO_PKG_VERSION")),
+            option_env!("OPENTAKE_BUILD_NUMBER"),
+            detect_os_version().as_deref(),
+        )
+    }
+}
+
+fn non_empty_or<'a>(value: Option<&'a str>, fallback: &'a str) -> &'a str {
+    value
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .unwrap_or(fallback)
+}
+
+fn normalize_os_version(raw: &str) -> Option<String> {
+    let mut components = raw.split(['.', '-']).filter_map(|component| {
+        let digits: String = component
+            .chars()
+            .skip_while(|character| !character.is_ascii_digit())
+            .take_while(|character| character.is_ascii_digit())
+            .collect();
+        (!digits.is_empty()).then_some(digits)
+    });
+    let major = components.next()?;
+    let minor = components.next().unwrap_or_else(|| "0".into());
+    let patch = components.next().unwrap_or_else(|| "0".into());
+    Some(format!("{major}.{minor}.{patch}"))
+}
+
+fn detect_os_version() -> Option<String> {
+    #[cfg(target_os = "macos")]
+    let output = Command::new("/usr/bin/sw_vers")
+        .args(["-productVersion"])
+        .output()
+        .ok()?;
+
+    #[cfg(all(unix, not(target_os = "macos")))]
+    let output = Command::new("uname").arg("-r").output().ok()?;
+
+    #[cfg(target_os = "windows")]
+    let output = Command::new("cmd").args(["/C", "ver"]).output().ok()?;
+
+    if !output.status.success() {
+        return None;
+    }
+    normalize_os_version(&String::from_utf8(output.stdout).ok()?)
+}
+
+pub struct FeedbackState {
+    client: Option<reqwest::Client>,
+    endpoint: Option<reqwest::Url>,
+    configuration_error: Option<String>,
+}
+
+impl Default for FeedbackState {
+    fn default() -> Self {
+        let configured = std::env::var(ENDPOINT_ENV).ok();
+        let (endpoint, mut configuration_error) = match configured.as_deref() {
+            None | Some("") => (None, None),
+            Some(value) => match reqwest::Url::parse(value) {
+                Ok(url) if url.scheme() == "https" => (Some(url), None),
+                Ok(_) => (None, Some(format!("{ENDPOINT_ENV} must use HTTPS"))),
+                Err(error) => (None, Some(format!("{ENDPOINT_ENV} is invalid: {error}"))),
+            },
+        };
+        let client = match reqwest::Client::builder()
+            .redirect(reqwest::redirect::Policy::none())
+            .timeout(Duration::from_secs(15))
+            .build()
+        {
+            Ok(client) => Some(client),
+            Err(error) => {
+                configuration_error.get_or_insert_with(|| {
+                    format!("feedback HTTP client could not be initialized: {error}")
+                });
+                None
+            }
+        };
+        Self {
+            client,
+            endpoint,
+            configuration_error,
+        }
+    }
+}
+
+impl FeedbackState {
+    async fn send(&self, submission: &FeedbackSubmission) -> Result<(), String> {
+        if let Some(error) = &self.configuration_error {
+            return Err(error.clone());
+        }
+        let endpoint = self.endpoint.as_ref().ok_or_else(|| {
+            "feedback is unavailable until an HTTPS endpoint is configured".to_owned()
+        })?;
+        let client = self
+            .client
+            .as_ref()
+            .ok_or_else(|| "feedback HTTP client is unavailable".to_owned())?;
+        let response = client
+            .post(endpoint.clone())
+            .json(submission)
+            .send()
+            .await
+            .map_err(|error| format!("feedback request failed: {error}"))?;
+        response
+            .error_for_status()
+            .map_err(|error| format!("feedback service rejected the submission: {error}"))?;
+        Ok(())
+    }
+}
+
+#[tauri::command]
+pub async fn submit_feedback(
+    state: State<'_, FeedbackState>,
+    draft: FeedbackDraft,
+) -> Result<(), String> {
+    let submission = FeedbackSubmission::from_runtime(draft)?;
+    state.send(&submission).await
+}
+
+#[cfg(test)]
+mod tests {
+    use super::normalize_os_version;
+
+    #[test]
+    fn normalizes_platform_version_formats() {
+        assert_eq!(normalize_os_version("15.5"), Some("15.5.0".into()));
+        assert_eq!(normalize_os_version("6.8.12-arch1"), Some("6.8.12".into()));
+        assert_eq!(
+            normalize_os_version("Microsoft Windows [Version 10.0.26100.1]"),
+            Some("10.0.26100".into())
+        );
+        assert_eq!(normalize_os_version("unknown"), None);
+    }
+}
diff --git a/src-tauri/src/generation.rs b/src-tauri/src/generation.rs
index 33b6c516..accda4b4 100644
--- a/src-tauri/src/generation.rs
+++ b/src-tauri/src/generation.rs
@@ -1393,6 +1393,7 @@ impl GenerationFinalizationStore for TauriFinalizationStore {
                         height: probe.height.map(|value| value as i32),
                         fps: probe.fps,
                         has_audio: probe.has_audio,
+                        color: probe.color.clone(),
                     },
                     created_at: Some(now_apple_reference_seconds()),
                 },
@@ -1605,6 +1606,33 @@ impl GenerationArtifactDownloader for SecureResultDownloader {
     }
 }
 
+/// Reuse the production generation downloader for advanced provider workflows.
+/// The destination must be a fresh explicit file path chosen by the caller.
+pub(crate) fn secure_download_generation_result(
+    staging_root: PathBuf,
+    cancel: MediaCancelToken,
+    raw_url: &str,
+    destination: &Path,
+) -> Result<(String, u64), String> {
+    let downloader = SecureResultDownloader::new(staging_root, cancel)?;
+    let artifact = downloader.download("advanced", raw_url)?;
+    let mut source = std::fs::File::open(&artifact.path)
+        .map_err(|_| "generation staging result disappeared".to_string())?;
+    let mut destination_file = std::fs::OpenOptions::new()
+        .write(true)
+        .create_new(true)
+        .open(destination)
+        .map_err(|_| "generated destination already exists or is unavailable".to_string())?;
+    let copy_result =
+        std::io::copy(&mut source, &mut destination_file).and_then(|_| destination_file.sync_all());
+    let _ = std::fs::remove_file(&artifact.path);
+    if copy_result.is_err() {
+        let _ = std::fs::remove_file(destination);
+        return Err("generated result could not be committed to staging".to_string());
+    }
+    Ok((artifact.media_type, artifact.byte_size))
+}
+
 fn build_client(provider: &str, managed: bool) -> Result<GenClient, String> {
     if managed {
         let (backend, token) = crate::account::generation_credential()?
@@ -2099,6 +2127,8 @@ mod tests {
                 source_height: Some(2),
                 source_fps: None,
                 has_audio: Some(false),
+                color: None,
+                proxy: None,
                 folder_id: None,
                 cached_remote_url: None,
                 cached_remote_url_expires_at: None,
@@ -2664,6 +2694,8 @@ mod tests {
                 source_height: Some(2),
                 source_fps: None,
                 has_audio: Some(false),
+                color: None,
+                proxy: None,
                 folder_id: None,
                 cached_remote_url: None,
                 cached_remote_url_expires_at: None,
diff --git a/src-tauri/src/home.rs b/src-tauri/src/home.rs
new file mode 100644
index 00000000..8b520fc8
--- /dev/null
+++ b/src-tauri/src/home.rs
@@ -0,0 +1,575 @@
+//! Native recent-project registry and capability-safe Home file actions.
+
+use std::fs;
+use std::io::Write;
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use std::sync::Mutex;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use serde::{Deserialize, Serialize};
+use tauri::{AppHandle, Manager};
+
+static REGISTRY_LOCK: Mutex<()> = Mutex::new(());
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+struct ProjectEntry {
+    id: String,
+    path: PathBuf,
+    created_at: u64,
+    last_opened_at: u64,
+    #[serde(default)]
+    modified_at: u64,
+    #[serde(default)]
+    thumbnail_path: Option<PathBuf>,
+}
+
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct HomeProjectEntry {
+    path: String,
+    name: String,
+    created_at: u64,
+    opened_at: u64,
+    modified_at: u64,
+    thumbnail_path: Option<PathBuf>,
+    missing: bool,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LegacyRecentProject {
+    path: String,
+    #[serde(default)]
+    opened_at: u64,
+    #[serde(default)]
+    created_at: Option<u64>,
+    #[serde(default)]
+    modified_at: Option<u64>,
+    #[serde(default)]
+    thumbnail_path: Option<String>,
+}
+
+struct ProjectRegistry {
+    ledger_path: PathBuf,
+    entries: Vec<ProjectEntry>,
+}
+
+impl ProjectRegistry {
+    fn load(ledger_path: PathBuf) -> Result<Self, String> {
+        let entries = match fs::read(&ledger_path) {
+            Ok(bytes) => serde_json::from_slice::<Vec<ProjectEntry>>(&bytes)
+                .map_err(|error| format!("decode project registry: {error}"))?,
+            Err(error) if error.kind() == std::io::ErrorKind::NotFound => Vec::new(),
+            Err(error) => return Err(format!("read project registry: {error}")),
+        };
+        Ok(Self {
+            ledger_path,
+            entries,
+        })
+    }
+
+    #[cfg(test)]
+    fn entries(&self) -> &[ProjectEntry] {
+        &self.entries
+    }
+
+    fn register_at(&mut self, path: PathBuf, opened_at: u64) -> Result<(), String> {
+        let path = validated_project_path(&path)?;
+        let mut next = self.entries.clone();
+        if let Some(entry) = next.iter_mut().find(|entry| same_path(&entry.path, &path)) {
+            entry.last_opened_at = opened_at;
+            refresh_entry_metadata(entry);
+        } else {
+            let (modified_at, thumbnail_path) = project_metadata(&path, opened_at);
+            next.push(ProjectEntry {
+                id: uuid::Uuid::new_v4().to_string(),
+                path,
+                created_at: opened_at,
+                last_opened_at: opened_at,
+                modified_at,
+                thumbnail_path,
+            });
+        }
+        sort_entries(&mut next);
+        self.replace_entries(next)
+    }
+
+    fn merge_legacy(&mut self, legacy: &[LegacyRecentProject]) -> Result<(), String> {
+        let mut next = self.entries.clone();
+        for item in legacy {
+            let path = validated_project_path(Path::new(&item.path))?;
+            if next.iter().any(|entry| same_path(&entry.path, &path)) {
+                continue;
+            }
+            let opened_at = item.opened_at.max(1);
+            let expected_thumbnail = path.join("thumbnail.jpg");
+            let legacy_thumbnail = item
+                .thumbnail_path
+                .as_ref()
+                .map(PathBuf::from)
+                .filter(|candidate| candidate == &expected_thumbnail);
+            let (disk_modified_at, disk_thumbnail) = project_metadata(&path, opened_at);
+            next.push(ProjectEntry {
+                id: uuid::Uuid::new_v4().to_string(),
+                path,
+                created_at: item.created_at.unwrap_or(opened_at),
+                last_opened_at: opened_at,
+                modified_at: if disk_modified_at == opened_at {
+                    item.modified_at.unwrap_or(opened_at)
+                } else {
+                    disk_modified_at
+                },
+                thumbnail_path: disk_thumbnail.or(legacy_thumbnail),
+            });
+        }
+        sort_entries(&mut next);
+        if next != self.entries {
+            self.replace_entries(next)?;
+        }
+        Ok(())
+    }
+
+    fn refresh_metadata(&mut self) -> Result<(), String> {
+        let mut next = self.entries.clone();
+        for entry in &mut next {
+            refresh_entry_metadata(entry);
+        }
+        if next != self.entries {
+            self.replace_entries(next)?;
+        }
+        Ok(())
+    }
+
+    fn remove(&mut self, path: &Path) -> Result<bool, String> {
+        let path = validated_project_path(path)?;
+        let mut next = self.entries.clone();
+        next.retain(|entry| !same_path(&entry.path, &path));
+        if next == self.entries {
+            return Ok(false);
+        }
+        self.replace_entries(next)?;
+        Ok(true)
+    }
+
+    fn trash_with(
+        &mut self,
+        path: &Path,
+        move_to_trash: impl FnOnce(&Path) -> Result<(), String>,
+    ) -> Result<(), String> {
+        let path = validated_project_path(path)?;
+        let registered = self
+            .entries
+            .iter()
+            .find(|entry| same_path(&entry.path, &path))
+            .map(|entry| entry.path.clone())
+            .ok_or_else(|| "project is not registered in Home".to_string())?;
+
+        if registered.exists() {
+            move_to_trash(&registered)?;
+        }
+        self.remove(&registered)?;
+        Ok(())
+    }
+
+    fn snapshot(&self) -> Vec<HomeProjectEntry> {
+        self.entries
+            .iter()
+            .map(|entry| HomeProjectEntry {
+                path: entry.path.to_string_lossy().into_owned(),
+                name: project_name(&entry.path),
+                created_at: entry.created_at,
+                opened_at: entry.last_opened_at,
+                modified_at: if entry.modified_at == 0 {
+                    entry.last_opened_at
+                } else {
+                    entry.modified_at
+                },
+                thumbnail_path: entry.thumbnail_path.clone(),
+                missing: !entry.path.exists(),
+            })
+            .collect()
+    }
+
+    fn registered_path(&self, path: &Path) -> Result<PathBuf, String> {
+        let path = validated_project_path(path)?;
+        self.entries
+            .iter()
+            .find(|entry| same_path(&entry.path, &path))
+            .map(|entry| entry.path.clone())
+            .ok_or_else(|| "project is not registered in Home".to_string())
+    }
+
+    fn replace_entries(&mut self, entries: Vec<ProjectEntry>) -> Result<(), String> {
+        persist_entries(&self.ledger_path, &entries)?;
+        self.entries = entries;
+        Ok(())
+    }
+}
+
+fn registry_path(app: &AppHandle) -> Result<PathBuf, String> {
+    Ok(app
+        .path()
+        .app_data_dir()
+        .map_err(|error| format!("resolve Home registry directory: {error}"))?
+        .join("project-registry.json"))
+}
+
+fn with_registry<T>(
+    app: &AppHandle,
+    operation: impl FnOnce(&mut ProjectRegistry) -> Result<T, String>,
+) -> Result<T, String> {
+    let _guard = REGISTRY_LOCK
+        .lock()
+        .map_err(|_| "project registry lock is poisoned".to_string())?;
+    let mut registry = ProjectRegistry::load(registry_path(app)?)?;
+    operation(&mut registry)
+}
+
+fn now_millis() -> u64 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_millis()
+        .try_into()
+        .unwrap_or(u64::MAX)
+}
+
+fn modified_millis(path: &Path) -> Option<u64> {
+    fs::metadata(path)
+        .ok()?
+        .modified()
+        .ok()?
+        .duration_since(UNIX_EPOCH)
+        .ok()?
+        .as_millis()
+        .try_into()
+        .ok()
+}
+
+fn project_metadata(path: &Path, fallback_modified_at: u64) -> (u64, Option<PathBuf>) {
+    if !path.exists() {
+        return (fallback_modified_at, None);
+    }
+    let project_file = path.join("project.json");
+    let modified_at = modified_millis(&project_file)
+        .or_else(|| modified_millis(path))
+        .unwrap_or(fallback_modified_at);
+    let thumbnail = path.join("thumbnail.jpg");
+    (modified_at, thumbnail.is_file().then_some(thumbnail))
+}
+
+fn refresh_entry_metadata(entry: &mut ProjectEntry) {
+    if !entry.path.exists() {
+        return;
+    }
+    let (modified_at, thumbnail_path) = project_metadata(&entry.path, entry.last_opened_at);
+    entry.modified_at = modified_at;
+    entry.thumbnail_path = thumbnail_path;
+}
+
+fn validated_project_path(path: &Path) -> Result<PathBuf, String> {
+    if !path.is_absolute() {
+        return Err("project path must be absolute".into());
+    }
+    if !path
+        .extension()
+        .and_then(|extension| extension.to_str())
+        .is_some_and(|extension| extension.eq_ignore_ascii_case("opentake"))
+    {
+        return Err("Home actions only accept .opentake project bundles".into());
+    }
+    Ok(path.to_path_buf())
+}
+
+fn same_path(left: &Path, right: &Path) -> bool {
+    match (left.canonicalize(), right.canonicalize()) {
+        (Ok(left), Ok(right)) => left == right,
+        _ => {
+            #[cfg(target_os = "windows")]
+            {
+                left.to_string_lossy()
+                    .eq_ignore_ascii_case(&right.to_string_lossy())
+            }
+            #[cfg(not(target_os = "windows"))]
+            {
+                left == right
+            }
+        }
+    }
+}
+
+fn sort_entries(entries: &mut [ProjectEntry]) {
+    entries.sort_by_key(|entry| std::cmp::Reverse(entry.last_opened_at));
+}
+
+fn project_name(path: &Path) -> String {
+    path.file_stem()
+        .and_then(|name| name.to_str())
+        .filter(|name| !name.is_empty())
+        .unwrap_or("Untitled")
+        .to_string()
+}
+
+fn persist_entries(path: &Path, entries: &[ProjectEntry]) -> Result<(), String> {
+    let parent = path
+        .parent()
+        .ok_or_else(|| "project registry path has no parent".to_string())?;
+    fs::create_dir_all(parent).map_err(|error| format!("create project registry: {error}"))?;
+    let temp = parent.join(format!(".project-registry.{}.tmp", uuid::Uuid::new_v4()));
+    let bytes = serde_json::to_vec_pretty(entries)
+        .map_err(|error| format!("encode project registry: {error}"))?;
+    let result = (|| {
+        let mut file = fs::File::create(&temp)
+            .map_err(|error| format!("create project registry staging file: {error}"))?;
+        file.write_all(&bytes)
+            .map_err(|error| format!("write project registry: {error}"))?;
+        file.sync_all()
+            .map_err(|error| format!("sync project registry: {error}"))?;
+
+        match fs::rename(&temp, path) {
+            Ok(()) => Ok(()),
+            Err(_first_error) if path.exists() => {
+                let backup =
+                    parent.join(format!(".project-registry.{}.backup", uuid::Uuid::new_v4()));
+                fs::rename(path, &backup)
+                    .map_err(|error| format!("preserve project registry: {error}"))?;
+                match fs::rename(&temp, path) {
+                    Ok(()) => {
+                        let _ = fs::remove_file(backup);
+                        Ok(())
+                    }
+                    Err(error) => {
+                        let _ = fs::rename(&backup, path);
+                        Err(format!("publish project registry: {error}"))
+                    }
+                }
+            }
+            Err(error) => Err(format!("publish project registry: {error}")),
+        }
+    })();
+    if result.is_err() {
+        let _ = fs::remove_file(temp);
+    }
+    result
+}
+
+fn reveal_in_file_manager(path: &Path) -> Result<(), String> {
+    let (program, arguments): (&str, Vec<String>) = if cfg!(target_os = "macos") {
+        if path.exists() {
+            (
+                "open",
+                vec!["-R".into(), path.to_string_lossy().into_owned()],
+            )
+        } else {
+            let parent = path.parent().unwrap_or(path);
+            ("open", vec![parent.to_string_lossy().into_owned()])
+        }
+    } else if cfg!(target_os = "windows") {
+        if path.exists() {
+            (
+                "explorer.exe",
+                vec![format!("/select,{}", path.to_string_lossy())],
+            )
+        } else {
+            let parent = path.parent().unwrap_or(path);
+            ("explorer.exe", vec![parent.to_string_lossy().into_owned()])
+        }
+    } else {
+        let target = path.parent().unwrap_or(path);
+        ("xdg-open", vec![target.to_string_lossy().into_owned()])
+    };
+    let status = Command::new(program)
+        .args(arguments)
+        .status()
+        .map_err(|error| format!("start file manager: {error}"))?;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(format!("file manager exited with status {status}"))
+    }
+}
+
+fn move_project_to_trash(path: &Path) -> Result<(), String> {
+    #[cfg(target_os = "macos")]
+    {
+        use objc2_foundation::{NSFileManager, NSString, NSURL};
+
+        let path_string = path.to_string_lossy();
+        let path_string = NSString::from_str(&path_string);
+        let url = NSURL::fileURLWithPath(&path_string);
+        NSFileManager::defaultManager()
+            .trashItemAtURL_resultingItemURL_error(&url, None)
+            .map_err(|error| format!("system trash operation failed: {error}"))
+    }
+
+    #[cfg(target_os = "windows")]
+    let mut command = {
+        let mut command = Command::new("powershell.exe");
+        command.args([
+            "-NoProfile",
+            "-NonInteractive",
+            "-Command",
+            "Add-Type -AssemblyName Microsoft.VisualBasic; $item = Get-Item -LiteralPath $args[0]; if ($item.PSIsContainer) { [Microsoft.VisualBasic.FileIO.FileSystem]::DeleteDirectory($item.FullName, 'OnlyErrorDialogs', 'SendToRecycleBin') } else { [Microsoft.VisualBasic.FileIO.FileSystem]::DeleteFile($item.FullName, 'OnlyErrorDialogs', 'SendToRecycleBin') }",
+            "--",
+        ]);
+        command.arg(path);
+        command
+    };
+
+    #[cfg(all(not(target_os = "macos"), not(target_os = "windows")))]
+    let mut command = {
+        let mut command = Command::new("gio");
+        command.arg("trash").arg(path);
+        command
+    };
+
+    #[cfg(not(target_os = "macos"))]
+    let output = command
+        .output()
+        .map_err(|error| format!("start system trash operation: {error}"))?;
+    #[cfg(not(target_os = "macos"))]
+    if output.status.success() {
+        Ok(())
+    } else {
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        Err(format!(
+            "system trash operation failed with {}{}",
+            output.status,
+            if stderr.trim().is_empty() {
+                String::new()
+            } else {
+                format!(": {}", stderr.trim())
+            }
+        ))
+    }
+}
+
+#[tauri::command]
+pub fn home_projects_sync(
+    app: AppHandle,
+    entries: Vec<LegacyRecentProject>,
+) -> Result<Vec<HomeProjectEntry>, String> {
+    with_registry(&app, |registry| {
+        registry.merge_legacy(&entries)?;
+        registry.refresh_metadata()?;
+        Ok(registry.snapshot())
+    })
+}
+
+#[tauri::command]
+pub fn home_project_register(
+    app: AppHandle,
+    path: String,
+    opened_at: Option<u64>,
+) -> Result<(), String> {
+    with_registry(&app, |registry| {
+        registry.register_at(PathBuf::from(path), opened_at.unwrap_or_else(now_millis))
+    })
+}
+
+#[tauri::command]
+pub fn home_project_remove(app: AppHandle, path: String) -> Result<(), String> {
+    with_registry(&app, |registry| {
+        registry.remove(Path::new(&path)).map(|_| ())
+    })
+}
+
+#[tauri::command]
+pub async fn home_project_trash(app: AppHandle, path: String) -> Result<(), String> {
+    tauri::async_runtime::spawn_blocking(move || {
+        with_registry(&app, |registry| {
+            registry.trash_with(Path::new(&path), move_project_to_trash)
+        })
+    })
+    .await
+    .map_err(|error| format!("project trash task failed: {error}"))?
+}
+
+#[tauri::command]
+pub async fn home_project_reveal(app: AppHandle, path: String) -> Result<(), String> {
+    tauri::async_runtime::spawn_blocking(move || {
+        let registered =
+            with_registry(&app, |registry| registry.registered_path(Path::new(&path)))?;
+        reveal_in_file_manager(&registered)
+    })
+    .await
+    .map_err(|error| format!("project reveal task failed: {error}"))?
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn missing_entry_survives_registry_load_and_safe_trash_removes_only_after_success() {
+        let directory = tempfile::tempdir().unwrap();
+        let ledger = directory.path().join("project-registry.json");
+        let missing = directory.path().join("Missing.opentake");
+        let existing = directory.path().join("Existing.opentake");
+        fs::create_dir(&existing).unwrap();
+
+        let mut registry = ProjectRegistry::load(ledger.clone()).unwrap();
+        registry.register_at(missing.clone(), 10).unwrap();
+        registry.register_at(existing.clone(), 20).unwrap();
+
+        let mut reloaded = ProjectRegistry::load(ledger).unwrap();
+        assert!(reloaded.entries().iter().any(|entry| entry.path == missing));
+
+        let denied = reloaded.trash_with(&existing, |_| Err("permission denied".into()));
+        assert!(denied.is_err());
+        assert!(existing.exists());
+        assert!(reloaded
+            .entries()
+            .iter()
+            .any(|entry| entry.path == existing));
+
+        reloaded
+            .trash_with(&existing, |path| {
+                fs::remove_dir_all(path).map_err(|error| error.to_string())
+            })
+            .unwrap();
+        assert!(!existing.exists());
+        assert!(!reloaded
+            .entries()
+            .iter()
+            .any(|entry| entry.path == existing));
+    }
+
+    #[test]
+    fn unregistered_or_non_project_paths_cannot_reach_trash_capability() {
+        let directory = tempfile::tempdir().unwrap();
+        let ledger = directory.path().join("project-registry.json");
+        let outside = directory.path().join("notes.txt");
+        fs::write(&outside, b"keep").unwrap();
+        let mut registry = ProjectRegistry::load(ledger).unwrap();
+        let mut called = false;
+
+        assert!(registry
+            .trash_with(&outside, |_| {
+                called = true;
+                Ok(())
+            })
+            .is_err());
+        assert!(!called);
+        assert!(outside.exists());
+    }
+
+    #[test]
+    fn snapshot_reads_persisted_thumbnail_and_modified_metadata() {
+        let directory = tempfile::tempdir().unwrap();
+        let ledger = directory.path().join("project-registry.json");
+        let project = directory.path().join("Metadata.opentake");
+        fs::create_dir(&project).unwrap();
+        fs::write(project.join("project.json"), b"{}").unwrap();
+        fs::write(project.join("thumbnail.jpg"), b"jpeg").unwrap();
+
+        let mut registry = ProjectRegistry::load(ledger).unwrap();
+        registry.register_at(project.clone(), 10).unwrap();
+        let entry = registry.snapshot().pop().unwrap();
+
+        assert!(entry.modified_at > 0);
+        assert_eq!(entry.thumbnail_path, Some(project.join("thumbnail.jpg")));
+    }
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 6ba94615..58250af9 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -7,21 +7,31 @@
 //! §2 — "真相源在 Rust，前端持镜像").
 
 mod account;
+mod advanced;
 mod captions;
 mod chat;
+mod codex;
 mod commands;
 // `pub` so the ffmpeg-gated integration test (`tests/export_integration.rs`) can
 // drive the export orchestrator (`export::run_export`) against the library
 // target. The Tauri command itself is registered below like the other modules.
 pub mod export;
+pub mod feedback;
 mod generation;
 mod haptic;
+mod home;
 mod library;
+mod lut;
 mod mcp;
 mod media;
-mod render;
+pub mod motion;
+// Public for the same reason as `export`: integration acceptance drives the
+// standalone compositing path against a generated project snapshot.
+pub mod render;
+mod samples;
 mod search;
 mod secret;
+pub mod telemetry;
 mod transcribe;
 
 // Streaming playback engine (#53). Feature-gated (`playback-engine`, now a DEFAULT
@@ -31,7 +41,9 @@ mod transcribe;
 #[cfg(feature = "playback-engine")]
 pub mod playback;
 
-use opentake_core::{AppCore, CoreEvent};
+use std::sync::Arc;
+
+use opentake_core::{AppCore, CoreEvent, IdGen};
 use opentake_media::library::LibraryStore;
 use opentake_media::MediaEngine;
 use tauri::{Emitter, Manager, WindowEvent};
@@ -42,6 +54,20 @@ use tauri::RunEvent;
 use crate::media::prewarm::PrewarmScheduler;
 use crate::media::MediaState;
 
+/// Production entity IDs must remain unique across save/reopen boundaries.
+/// The core's sequential default is intentionally deterministic for tests, but
+/// a new desktop process would restart it at `id-1` and collide with IDs loaded
+/// from an existing project. UUIDs match the upstream persistence contract and
+/// need no mutable state to survive an application restart.
+#[derive(Debug, Default)]
+struct UuidIdGen;
+
+impl IdGen for UuidIdGen {
+    fn next_id(&self) -> String {
+        uuid::Uuid::new_v4().to_string()
+    }
+}
+
 /// Build and run the Tauri application. The `main.rs` binary calls this.
 ///
 /// Lifecycle mirrors upstream's "the app stays resident; closing the window
@@ -51,11 +77,21 @@ use crate::media::MediaState;
 /// keeps running in the background. Dock-reopen ([`RunEvent::Reopen`]) shows it
 /// again. `Cmd+Q` still exits (it raises `ExitRequested`, not prevented here).
 pub fn run() {
+    // Telemetry is a strict opt-in at the configuration boundary: without an
+    // explicit packaged/environment DSN this creates no SDK client or network.
+    let _telemetry = telemetry::init_telemetry();
+
     // Pin ffmpeg/ffprobe before anything decodes (see `resolve_media_tools`).
     resolve_media_tools();
 
     tauri::Builder::default()
         .plugin(tauri_plugin_dialog::init())
+        // Native dialog selections expand Tauri's runtime scopes. Persist the
+        // resulting file + asset grants for Recents, while keeping the static
+        // asset scope limited to application-owned cache/data/resources.
+        // Tauri requires fs to be initialized before persisted-scope.
+        .plugin(tauri_plugin_fs::init())
+        .plugin(tauri_plugin_persisted_scope::init())
         .on_window_event(|window, event| {
             if let WindowEvent::CloseRequested { api, .. } = event {
                 // Background-run: don't quit, hide and return to Home.
@@ -80,7 +116,8 @@ pub fn run() {
                 .set_activation_policy(tauri::ActivationPolicy::Regular);
 
             // The one authoritative editing session, shared with every command.
-            let core = AppCore::new();
+            let mut core = AppCore::new();
+            core.set_id_gen(Arc::new(UuidIdGen));
             let initial_project_epoch = core.project_revision().project_epoch;
 
             // Forward core events to the WebView. The closure runs on whatever
@@ -119,19 +156,32 @@ pub fn run() {
                 .join("workflows");
             let generation_bridge =
                 generation::build_bridge(core.clone(), cache_root.clone(), models_dir.clone());
+            let motion_bridge = Arc::new(motion::TauriMotionBridge::new(
+                core.clone(),
+                cache_root.clone(),
+            ));
+            let advanced_bridge = Arc::new(advanced::TauriAdvancedWorkflowBridge::new(
+                core.clone(),
+                cache_root.clone(),
+                models_dir.clone(),
+            ));
             mcp::spawn(
                 core.clone(),
                 workflows_dir.clone(),
                 cache_root.clone(),
                 models_dir.clone(),
                 generation_bridge.clone(),
+                motion_bridge.clone(),
+                advanced_bridge.clone(),
             );
-            let chat_state = chat::ChatState::new_with_generation(
+            let chat_state = chat::ChatState::new_with_capabilities(
                 core.clone(),
                 workflows_dir,
                 cache_root.clone(),
                 models_dir.clone(),
                 generation_bridge.clone(),
+                motion_bridge.clone(),
+                advanced_bridge.clone(),
             );
 
             // A global favorite must never silently become a temporary file.
@@ -147,9 +197,45 @@ pub fn run() {
             };
 
             app.manage(core);
+            app.manage(commands::ProjectLifecycleCoordinator::default());
             app.manage(generation_bridge);
+            let motion_state = motion::MotionCommandState::new(motion_bridge);
+            let motion_transition_state = motion_state.clone();
+            app.state::<AppCore>()
+                .subscribe_project_identity_transition(move |pending| {
+                    if pending {
+                        motion_transition_state.cancel_active();
+                    }
+                });
+            app.manage(motion_state);
+            app.manage(advanced::AdvancedWorkflowCommandState::new(advanced_bridge));
+            app.manage(advanced::MattingModelInstallState::default());
+            let advanced_transition_handle = app.handle().clone();
+            app.state::<AppCore>()
+                .subscribe_project_identity_transition(move |pending| {
+                    if pending {
+                        advanced_transition_handle
+                            .state::<advanced::AdvancedWorkflowCommandState>()
+                            .cancel_active();
+                    }
+                });
             app.manage(chat_state);
+            app.manage(codex::CodexAuthState::default());
             app.manage(MediaState::new(engine));
+            app.manage(media::StabilizationAnalysisState::default());
+            app.manage(media::LoudnessAnalysisState::default());
+            app.manage(media::DenoiseAnalysisState::default());
+            app.manage(media::StemSeparationState::default());
+            app.manage(media::MediaProxyState::default());
+            let proxy_transition_handle = app.handle().clone();
+            app.state::<AppCore>()
+                .subscribe_project_identity_transition(move |pending| {
+                    if pending {
+                        proxy_transition_handle
+                            .state::<media::MediaProxyState>()
+                            .cancel();
+                    }
+                });
             app.manage(PrewarmScheduler::new(initial_project_epoch));
             app.manage(library_state);
             // Lazily-acquired GPU context for timeline composite previews (#47).
@@ -157,6 +243,7 @@ pub fn run() {
             // Shared cancel flag for the in-flight `export_video` (#112 progress
             // + cancel). One export runs at a time, so a single flag suffices.
             app.manage(export::ExportControl::default());
+            app.manage(feedback::FeedbackState::default());
             // Optional account scaffold. It starts offline and never performs
             // network I/O until the user configures a backend and logs in.
             app.manage(account::AccountState::default());
@@ -191,9 +278,17 @@ pub fn run() {
             commands::export_edl,
             commands::export_otio,
             commands::export_subtitles,
+            feedback::submit_feedback,
             commands::check_path_exists,
+            home::home_projects_sync,
+            home::home_project_register,
+            home::home_project_remove,
+            home::home_project_trash,
+            home::home_project_reveal,
+            samples::sample_project_materialize,
             media::import_folder,
             media::import_media,
+            lut::import_lut,
             media::relink_media,
             media::get_media,
             media::toggle_favorite,
@@ -201,6 +296,20 @@ pub fn run() {
             media::save_clip_as_media,
             media::extract_audio,
             media::get_waveform,
+            media::analyze_stabilization,
+            media::cancel_stabilization_analysis,
+            media::analyze_loudness,
+            media::cancel_loudness_analysis,
+            media::prepare_denoise,
+            media::cancel_denoise_analysis,
+            media::separate_audio_stems,
+            media::cancel_stem_separation,
+            media::import_stems_to_tracks,
+            media::create_media_proxy,
+            media::cancel_media_proxy,
+            media::remove_media_proxy,
+            media::set_proxy_playback_enabled,
+            media::get_proxy_playback_enabled,
             media::generate_thumbnail,
             media::request_timeline_sprite,
             media::set_timeline_sprite_interactive,
@@ -215,6 +324,23 @@ pub fn run() {
             export::cancel_export,
             generation::generation_cancel,
             generation::generation_retry,
+            motion::motion_capability,
+            motion::motion_add,
+            motion::motion_edit,
+            motion::motion_cancel,
+            advanced::matting_model_status,
+            advanced::download_matting_model,
+            advanced::cancel_matting_model_download,
+            advanced::advanced_track_motion,
+            advanced::advanced_generate_matte,
+            advanced::advanced_remove_object,
+            advanced::advanced_match_color,
+            advanced::advanced_translate_captions,
+            advanced::advanced_apply_caption_translation_review,
+            advanced::advanced_script_to_video,
+            advanced::advanced_generate_avatar,
+            advanced::advanced_clone_voice,
+            advanced::cancel_advanced_workflow,
             secret::secret_save,
             secret::secret_load,
             secret::secret_delete,
@@ -223,6 +349,10 @@ pub fn run() {
             account::account_login,
             account::account_logout,
             account::account_get_status,
+            codex::codex_auth_status,
+            codex::codex_login_start,
+            codex::codex_login_cancel,
+            codex::codex_logout,
             chat::chat_send,
             chat::chat_history,
             chat::chat_sessions,
@@ -278,18 +408,35 @@ pub fn run() {
         });
 }
 
-/// Locate `ffmpeg` / `ffprobe` and export `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE`
-/// (the override `opentake-media`'s `ff` module reads) so decoding works in a
-/// packaged app.
+/// Pin `OPENTAKE_FFMPEG` / `OPENTAKE_FFPROBE` before any media initialization.
 ///
-/// A macOS `.app` launched from Finder/Dock inherits the minimal **launchd**
-/// `PATH` (`/usr/bin:/bin:/usr/sbin:/sbin`), which omits Homebrew
-/// (`/opt/homebrew/bin`) and `/usr/local/bin`. A PATH-only `ffmpeg` lookup then
-/// fails and every frame decode returns nothing — the timeline preview stays
-/// black even though the code is correct. Pin an absolute path from the common
-/// install locations instead. (Bundling the binaries via Tauri `externalBin` is
-/// the cross-machine follow-up; this unblocks any host that has ffmpeg on disk.)
+/// A packaged application must use the two regular sidecars beside its own
+/// executable. Release builds deliberately pin the expected sibling paths even
+/// when a file is missing, so a corrupt package fails closed instead of silently
+/// invoking an attacker-controlled or developer-installed binary from PATH.
+/// Debug builds retain explicit overrides and host discovery for development.
 fn resolve_media_tools() {
+    let packaged = ["ffmpeg", "ffprobe"].map(opentake_media::ffmpeg_status::packaged_sidecar_path);
+    if let [Some(ffmpeg), Some(ffprobe)] = packaged {
+        std::env::set_var("OPENTAKE_FFMPEG", ffmpeg);
+        std::env::set_var("OPENTAKE_FFPROBE", ffprobe);
+        return;
+    }
+
+    if !cfg!(debug_assertions) {
+        if let Ok(executable) = std::env::current_exe() {
+            if let Some(parent) = executable.parent() {
+                let extension = if cfg!(windows) { ".exe" } else { "" };
+                std::env::set_var("OPENTAKE_FFMPEG", parent.join(format!("ffmpeg{extension}")));
+                std::env::set_var(
+                    "OPENTAKE_FFPROBE",
+                    parent.join(format!("ffprobe{extension}")),
+                );
+            }
+        }
+        return;
+    }
+
     for (key, bin) in [
         ("OPENTAKE_FFMPEG", "ffmpeg"),
         ("OPENTAKE_FFPROBE", "ffprobe"),
@@ -350,13 +497,124 @@ fn forward_event(app: &tauri::AppHandle, event: &CoreEvent) {
             }
         }
     }
+    forward_core_event(event, |name, payload| app.emit(name, payload));
+}
+
+/// Emit the stable front-end name and the original tagged payload while making
+/// teardown failures explicitly non-fatal. Keeping this boundary independent
+/// of `AppHandle` lets the full mapping and failure policy run in unit tests.
+fn forward_core_event<E>(
+    event: &CoreEvent,
+    emit: impl FnOnce(&'static str, &CoreEvent) -> Result<(), E>,
+) {
     let name = match event {
         CoreEvent::TimelineChanged { .. } => "timeline_changed",
         CoreEvent::ProjectOpened { .. } => "project_opened",
         CoreEvent::ProjectSaved { .. } => "project_saved",
         CoreEvent::MediaChanged { .. } => "media_changed",
     };
-    // Best-effort: a missing WebView (e.g. during teardown) must not panic the
-    // emitting thread.
-    let _ = app.emit(name, event);
+    let _ = emit(name, event);
+}
+
+#[cfg(test)]
+mod id_tests {
+    use std::collections::HashSet;
+
+    use super::*;
+
+    #[test]
+    fn production_ids_are_unique_and_uuid_shaped() {
+        let generator = UuidIdGen;
+        let ids = (0..256)
+            .map(|_| generator.next_id())
+            .collect::<HashSet<_>>();
+
+        assert_eq!(ids.len(), 256);
+        assert!(ids.iter().all(|id| uuid::Uuid::parse_str(id).is_ok()));
+    }
+
+    #[test]
+    fn core_event_forwarding_maps_every_name_and_tagged_payload() {
+        let cases = [
+            (
+                CoreEvent::TimelineChanged {
+                    project_epoch: 1,
+                    version: 2,
+                },
+                "timeline_changed",
+                serde_json::json!({
+                    "kind": "timeline_changed",
+                    "projectEpoch": 1,
+                    "version": 2,
+                }),
+            ),
+            (
+                CoreEvent::ProjectOpened {
+                    path: "/project.otk".into(),
+                    project_epoch: 3,
+                    version: 0,
+                },
+                "project_opened",
+                serde_json::json!({
+                    "kind": "project_opened",
+                    "path": "/project.otk",
+                    "projectEpoch": 3,
+                    "version": 0,
+                }),
+            ),
+            (
+                CoreEvent::ProjectSaved {
+                    path: "/project.otk".into(),
+                    project_epoch: 3,
+                },
+                "project_saved",
+                serde_json::json!({
+                    "kind": "project_saved",
+                    "path": "/project.otk",
+                    "projectEpoch": 3,
+                }),
+            ),
+            (
+                CoreEvent::MediaChanged {
+                    project_epoch: 3,
+                    count: 4,
+                },
+                "media_changed",
+                serde_json::json!({
+                    "kind": "media_changed",
+                    "projectEpoch": 3,
+                    "count": 4,
+                }),
+            ),
+        ];
+
+        for (event, expected_name, expected_payload) in cases {
+            forward_core_event(&event, |name, payload| {
+                assert_eq!(name, expected_name);
+                assert_eq!(serde_json::to_value(payload).unwrap(), expected_payload);
+                Ok::<(), ()>(())
+            });
+        }
+    }
+
+    #[test]
+    fn core_event_forwarding_swallows_emit_failure_and_delivery_continues() {
+        use std::sync::atomic::{AtomicUsize, Ordering};
+
+        let bus = opentake_core::EventBus::new();
+        let delivered = Arc::new(AtomicUsize::new(0));
+        bus.subscribe(|event| {
+            forward_core_event(event, |_name, _payload| Err::<(), _>("WebView unavailable"));
+        });
+        let delivered_sink = Arc::clone(&delivered);
+        bus.subscribe(move |_| {
+            delivered_sink.fetch_add(1, Ordering::SeqCst);
+        });
+
+        bus.emit(&CoreEvent::TimelineChanged {
+            project_epoch: 5,
+            version: 8,
+        });
+        assert_eq!(delivered.load(Ordering::SeqCst), 1);
+    }
 }
diff --git a/src-tauri/src/library.rs b/src-tauri/src/library.rs
index 4c0cfa53..7b1f9f05 100644
--- a/src-tauri/src/library.rs
+++ b/src-tauri/src/library.rs
@@ -936,6 +936,7 @@ fn probe_or_default_file(
             height: p.height.map(|h| h as i32),
             fps: p.fps,
             has_audio: p.has_audio,
+            color: p.color,
         },
         Err(_) => ProbedMedia::default(),
     }
diff --git a/src-tauri/src/lut.rs b/src-tauri/src/lut.rs
new file mode 100644
index 00000000..9e936429
--- /dev/null
+++ b/src-tauri/src/lut.rs
@@ -0,0 +1,200 @@
+//! Secure project-managed 3D LUT import and shared runtime resolution.
+
+use std::io::Read;
+use std::path::Path;
+use std::rc::Rc;
+
+use cap_fs_ext::{ambient_authority, FollowSymlinks, OpenOptionsFollowExt};
+#[cfg(unix)]
+use cap_std::fs::OpenOptionsExt;
+use cap_std::fs::{Dir, OpenOptions};
+use opentake_core::AppCore;
+use opentake_domain::{CubeLut, LutReference};
+use opentake_project::ProjectRoot;
+use opentake_render::gpu::texture::upload_lut_3d;
+use opentake_render::{GpuLutTexture, RenderError};
+use sha2::{Digest, Sha256};
+use tauri::State;
+
+fn sha256_hex(bytes: &[u8]) -> String {
+    let digest = Sha256::digest(bytes);
+    digest.iter().map(|byte| format!("{byte:02x}")).collect()
+}
+
+fn read_source(path: &Path) -> Result<Vec<u8>, String> {
+    if !path.is_absolute() {
+        return Err("LUT source path must be absolute".to_string());
+    }
+    if path
+        .extension()
+        .and_then(|value| value.to_str())
+        .map(str::to_ascii_lowercase)
+        .as_deref()
+        != Some("cube")
+    {
+        return Err("LUT source must have a .cube extension".to_string());
+    }
+    let parent_path = path
+        .parent()
+        .ok_or_else(|| "LUT source has no parent".to_string())?;
+    let name = path
+        .file_name()
+        .ok_or_else(|| "LUT source has no filename".to_string())?;
+    let parent = Dir::open_ambient_dir(parent_path, ambient_authority())
+        .map_err(|error| format!("open LUT source directory: {error}"))?;
+    let mut options = OpenOptions::new();
+    options.read(true).follow(FollowSymlinks::No);
+    #[cfg(unix)]
+    options.custom_flags(libc::O_NONBLOCK);
+    let mut file = parent
+        .open_with(name, &options)
+        .map_err(|error| format!("open LUT source without following links: {error}"))?;
+    let metadata = file
+        .metadata()
+        .map_err(|error| format!("inspect LUT source: {error}"))?;
+    if !metadata.is_file() {
+        return Err("LUT source must be a regular file".to_string());
+    }
+    if metadata.len() > CubeLut::MAX_BYTES as u64 {
+        return Err(format!("LUT source exceeds {} bytes", CubeLut::MAX_BYTES));
+    }
+    let mut bytes = Vec::with_capacity(metadata.len() as usize);
+    Read::by_ref(&mut file)
+        .take(CubeLut::MAX_BYTES as u64 + 1)
+        .read_to_end(&mut bytes)
+        .map_err(|error| format!("read LUT source: {error}"))?;
+    if bytes.len() > CubeLut::MAX_BYTES {
+        return Err(format!("LUT source exceeds {} bytes", CubeLut::MAX_BYTES));
+    }
+    Ok(bytes)
+}
+
+/// Validate an untrusted `.cube`, publish it by content hash inside the active
+/// bundle, and return the path-free authored reference for a later `SetLut`.
+#[tauri::command]
+pub fn import_lut(core: State<'_, AppCore>, path: String) -> Result<LutReference, String> {
+    import_lut_impl(&core, &path)
+}
+
+fn import_lut_impl(core: &AppCore, path: &str) -> Result<LutReference, String> {
+    let source_path = Path::new(path);
+    let bytes = read_source(source_path)?;
+    CubeLut::parse(&bytes).map_err(|error| format!("invalid LUT: {error}"))?;
+    let id = sha256_hex(&bytes);
+    let display_name = source_path
+        .file_stem()
+        .and_then(|value| value.to_str())
+        .map(|value| {
+            value
+                .chars()
+                .filter(|character| !character.is_control())
+                .take(128)
+                .collect::<String>()
+        })
+        .filter(|value| !value.is_empty())
+        .unwrap_or_else(|| "Imported LUT".to_string());
+    let reference = LutReference::new(id, display_name, 1.0).map_err(|error| error.to_string())?;
+
+    let _workflow = core.lock_project_identity_workflow();
+    let snapshot = core.runtime_snapshot();
+    let project_dir = snapshot
+        .project_dir
+        .ok_or_else(|| "save the project before importing a LUT".to_string())?;
+    core.mutable_runtime_snapshot_for_project(snapshot.project_epoch, &project_dir)
+        .map_err(|error| error.to_string())?;
+    let root = ProjectRoot::open(&project_dir).map_err(|error| error.to_string())?;
+    core.ensure_project_root_identity_for_project(
+        snapshot.project_epoch,
+        &project_dir,
+        root.identity(),
+    )
+    .map_err(|error| error.to_string())?;
+    root.write_lut_atomic(&format!("{}.cube", reference.id), &bytes)
+        .map_err(|error| error.to_string())?;
+    Ok(reference)
+}
+
+/// Read, hash-check, parse and upload one managed asset for preview/export/
+/// playback. A tampered asset is a render error, never an identity fallback.
+pub(crate) fn resolve_project_lut(
+    root: Option<&ProjectRoot>,
+    reference: &LutReference,
+    device: &opentake_render::wgpu::Device,
+    queue: &opentake_render::wgpu::Queue,
+    label: &str,
+) -> Result<Option<Rc<GpuLutTexture>>, RenderError> {
+    reference.validate()?;
+    let Some(root) = root else {
+        return Ok(None);
+    };
+    let filename = format!("{}.cube", reference.id);
+    let bytes = root
+        .read_lut(&filename, CubeLut::MAX_BYTES)
+        .map_err(|error| RenderError::InvalidLut(error.to_string()))?
+        .ok_or_else(|| RenderError::MissingLut(reference.id.clone()))?;
+    if sha256_hex(&bytes) != reference.id {
+        return Err(RenderError::InvalidLut(format!(
+            "managed LUT {} failed its content hash",
+            reference.id
+        )));
+    }
+    let lut = CubeLut::parse(&bytes).map_err(|error| RenderError::InvalidLut(error.to_string()))?;
+    Ok(Some(Rc::new(upload_lut_3d(
+        device,
+        queue,
+        &lut,
+        Some(label),
+    ))))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn source_reader_rejects_relative_paths_before_io() {
+        assert_eq!(
+            read_source(Path::new("relative.cube")).unwrap_err(),
+            "LUT source path must be absolute"
+        );
+    }
+
+    #[test]
+    fn import_validates_then_copies_by_hash_into_the_active_bundle() {
+        let temp = tempfile::tempdir().unwrap();
+        let bundle = temp.path().join("LutImport.opentake");
+        let source = temp.path().join("Known Transform.cube");
+        let mut bytes = b"LUT_3D_SIZE 17\nDOMAIN_MIN 0 0 0\nDOMAIN_MAX 1 1 1\n".to_vec();
+        for _ in 0..17_usize.pow(3) {
+            bytes.extend_from_slice(b"0 0 0\n");
+        }
+        std::fs::write(&source, &bytes).unwrap();
+
+        let core = AppCore::new();
+        core.new_project();
+        core.save_project(Some(bundle.clone())).unwrap();
+        let reference = import_lut_impl(&core, source.to_str().unwrap()).unwrap();
+        assert_eq!(reference.name, "Known Transform");
+        assert_eq!(reference.id, sha256_hex(&bytes));
+        let root = ProjectRoot::open(bundle).unwrap();
+        assert_eq!(
+            root.read_lut(&format!("{}.cube", reference.id), CubeLut::MAX_BYTES)
+                .unwrap(),
+            Some(bytes)
+        );
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn import_rejects_a_symlink_source() {
+        use std::os::unix::fs::symlink;
+
+        let temp = tempfile::tempdir().unwrap();
+        let target = temp.path().join("target.cube");
+        let link = temp.path().join("link.cube");
+        std::fs::write(&target, b"LUT_3D_SIZE 17\n").unwrap();
+        symlink(target, &link).unwrap();
+        let error = read_source(&link).unwrap_err();
+        assert!(error.contains("without following links"));
+    }
+}
diff --git a/src-tauri/src/mcp.rs b/src-tauri/src/mcp.rs
index 95422a0a..fdc37f17 100644
--- a/src-tauri/src/mcp.rs
+++ b/src-tauri/src/mcp.rs
@@ -17,7 +17,7 @@
 //! built from the same cache/models dirs the UI uses, so imports produce the exact
 //! same posters / manifest entries / `MediaChanged` events as the media panel.
 
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::io::{Seek, SeekFrom, Write};
 use std::path::{Path, PathBuf};
 use std::rc::Rc;
@@ -29,6 +29,7 @@ use std::io::Read;
 
 use base64::Engine as _;
 
+use opentake_agent::mcp::advanced::AdvancedWorkflowBridge;
 use opentake_agent::mcp::core_handle::{AppCoreHandle, CoreHandle};
 use opentake_agent::mcp::generation::GenerationBridge;
 use opentake_agent::mcp::media_bridge::{
@@ -37,19 +38,21 @@ use opentake_agent::mcp::media_bridge::{
     SearchIndexState, SearchMediaResult, SearchSpokenHit, SearchVisualHit, TranscriptSource,
     TranscriptSourceResult, IMPORT_BYTES_DECODED_MAX,
 };
+use opentake_agent::mcp::motion::MotionBridge;
 use opentake_agent::mcp::server;
 use opentake_agent::plugin::registry::PluginRegistry;
 use opentake_core::{
     importable_clip_type, AppCore, CoreError, DeferredCoreEvents, ProbedMedia,
     ProjectRuntimeSnapshot,
 };
-use opentake_domain::{ClipType, MediaSource, TextStyle};
+use opentake_domain::{ClipType, LutReference, MediaSource, TextStyle};
 use opentake_media::{decode_frame_at, decode_frames_at, FrameRequest, MediaEngine, RgbaFrame};
+use opentake_project::ProjectRoot;
 use opentake_render::gpu::texture::upload_rgba;
 use opentake_render::{
-    build_render_plan, even, Compositor, CosmicTextRasterizer, DecodedFrame, GpuTexture,
-    RenderDevice, RenderSize, SourceMetrics, TextRasterRequest, TextRasterizer, TextureCache,
-    TextureResolver, TextureSource,
+    even, try_build_render_plan, Compositor, CosmicTextRasterizer, DecodedFrame, FramePlan,
+    GpuLutTexture, GpuTexture, LayerDraw, RenderDevice, RenderSize, SourceMetrics,
+    TextRasterRequest, TextRasterizer, TextureCache, TextureResolver, TextureSource,
 };
 
 use crate::library::ProjectMediaCapability;
@@ -259,6 +262,8 @@ pub fn spawn(
     cache_root: PathBuf,
     models_dir: PathBuf,
     generation_bridge: Arc<dyn GenerationBridge>,
+    motion_bridge: Arc<dyn MotionBridge>,
+    advanced_bridge: Arc<dyn AdvancedWorkflowBridge>,
 ) {
     let handle: Arc<dyn CoreHandle> = Arc::new(AppCoreHandle::new(core.clone()));
     let bridge = build_media_bridge(core, cache_root, models_dir);
@@ -271,12 +276,14 @@ pub fn spawn(
                 return;
             }
         };
-        if let Err(e) = server::serve_with_bridges(
+        if let Err(e) = server::serve_with_all_capability_bridges(
             addr,
             handle,
             registry,
             Some(bridge),
             Some(generation_bridge),
+            Some(motion_bridge),
+            Some(advanced_bridge),
         )
         .await
         {
@@ -642,6 +649,7 @@ impl TauriMediaBridge {
             height: probe.height.map(|value| value as i32),
             fps: probe.fps,
             has_audio: probe.has_audio,
+            color: probe.color,
         })
     }
 
@@ -1231,12 +1239,6 @@ fn inspect_source_media(
             "inspect_media: text clips are not source media",
         ));
     }
-    if entry.kind == ClipType::Lottie {
-        return Err(BridgeError::unavailable(
-            "inspect_media: Lottie rendering is not available in this build",
-        ));
-    }
-
     let (path, _) =
         crate::transcribe::resolve_asset_from_snapshot(&snapshot, &request.media_ref)
             .map_err(|_| BridgeError::unavailable("inspect_media: source media is offline"))?;
@@ -1249,6 +1251,10 @@ fn inspect_source_media(
     }
     let byte_size = metadata.len();
 
+    if entry.kind == ClipType::Lottie {
+        return inspect_lottie_frames(&path, request, byte_size);
+    }
+
     if entry.kind == ClipType::Image {
         let frame =
             opentake_media::thumbnail::image_thumbnail(&path, INSPECT_MEDIA_FRAME_MAX_DIMENSION)
@@ -1323,6 +1329,154 @@ fn inspect_source_media(
     })
 }
 
+fn inspect_lottie_frames(
+    path: &Path,
+    request: &InspectMediaRequest,
+    byte_size: u64,
+) -> Result<InspectMediaResult, BridgeError> {
+    struct FixedResolver(Rc<GpuTexture>);
+
+    impl TextureResolver for FixedResolver {
+        fn resolve(
+            &mut self,
+            _source: &TextureSource,
+            _source_frame: i64,
+        ) -> Option<Rc<GpuTexture>> {
+            Some(self.0.clone())
+        }
+    }
+
+    let dev = RenderDevice::try_new()
+        .map_err(|_| BridgeError::unavailable("inspect_media: Lottie GPU rendering unavailable"))?;
+    let mut materializer = crate::render::LottieMaterializer::new();
+    let metadata = materializer
+        .metadata(path)
+        .map_err(|_| BridgeError::unavailable("inspect_media: invalid Lottie document"))?;
+    let start = request
+        .start_seconds
+        .unwrap_or(0.0)
+        .clamp(0.0, metadata.duration_seconds);
+    let end = request
+        .end_seconds
+        .unwrap_or(metadata.duration_seconds)
+        .clamp(0.0, metadata.duration_seconds);
+    if start >= end {
+        return Err(BridgeError::new(
+            "inspect_media: requested time range is outside the Lottie animation",
+        ));
+    }
+
+    let count = if request.overview {
+        INSPECT_MEDIA_OVERVIEW_TILES
+    } else {
+        request.max_frames.max(1)
+    };
+    let timestamps = (0..count)
+        .map(|index| start + (end - start) * (index as f64 + 0.5) / count as f64)
+        .collect::<Vec<_>>();
+    let render_size = fit_render_size(
+        metadata.width as i32,
+        metadata.height as i32,
+        INSPECT_MEDIA_FRAME_MAX_DIMENSION,
+    );
+    let source = TextureSource::Lottie {
+        media_ref: request.media_ref.clone(),
+    };
+    let compositor = Compositor::new(&dev.device);
+    let mut cache = TextureCache::new(TEXTURE_CACHE_CAP);
+    let mut rendered = Vec::with_capacity(timestamps.len());
+    for &timestamp in &timestamps {
+        let source_frame = (timestamp * metadata.frame_rate)
+            .floor()
+            .clamp(0.0, (metadata.frame_count - 1) as f64) as i64;
+        let texture = materializer
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut cache,
+                path,
+                source_frame,
+                (render_size.width, render_size.height),
+                "inspect-media-lottie",
+            )
+            .map_err(|_| BridgeError::new("inspect_media: failed to render Lottie frame"))?;
+        let draw = LayerDraw {
+            source: &source,
+            source_frame,
+            affine: [1.0, 0.0, 0.0, 1.0, 0.0, 0.0],
+            nat_size: (render_size.width as f64, render_size.height as f64),
+            crop_uv: (0.0, 0.0, 1.0, 1.0),
+            opacity: 1.0,
+            needs_premultiply: false,
+            clip_id: "inspect-media-lottie",
+            color_grade: None,
+            lut: None,
+            chroma_key: None,
+            masks: &[],
+            effects: &[],
+        };
+        let plan = FramePlan {
+            // Lottie inspection deliberately exposes transparency over neutral
+            // gray, matching the public tool description and upstream behavior.
+            clear_rgba: [0.5, 0.5, 0.5, 1.0],
+            draws: vec![draw],
+        };
+        let frame = compositor
+            .render_to_rgba(
+                &dev.device,
+                &dev.queue,
+                render_size,
+                &plan,
+                &mut FixedResolver(texture),
+            )
+            .map_err(|_| BridgeError::new("inspect_media: failed to composite Lottie frame"))?;
+        rendered.push((
+            timestamp,
+            RgbaFrame::new(frame.width, frame.height, frame.rgba),
+        ));
+    }
+
+    let (frames, overview_timestamps) = if request.overview {
+        let (bytes, _, _) = encode_storyboard_jpeg(&rendered)
+            .ok_or_else(|| BridgeError::new("inspect_media: failed to encode Lottie overview"))?;
+        (
+            vec![InspectedMediaFrame {
+                timestamp_seconds: start,
+                bytes,
+                media_type: "image/jpeg".into(),
+            }],
+            timestamps,
+        )
+    } else {
+        let frames = rendered
+            .iter()
+            .map(|(timestamp_seconds, frame)| {
+                encode_rgba_jpeg(frame)
+                    .map(|bytes| InspectedMediaFrame {
+                        timestamp_seconds: *timestamp_seconds,
+                        bytes,
+                        media_type: "image/jpeg".into(),
+                    })
+                    .ok_or_else(|| BridgeError::new("inspect_media: failed to encode Lottie frame"))
+            })
+            .collect::<Result<Vec<_>, _>>()?;
+        (frames, Vec::new())
+    };
+
+    Ok(InspectMediaResult {
+        frames,
+        overview_timestamps,
+        duration_seconds: metadata.duration_seconds,
+        width: Some(metadata.width),
+        height: Some(metadata.height),
+        fps: Some(metadata.frame_rate),
+        has_audio: false,
+        byte_size,
+        transcript: None,
+        transcription_unavailable: false,
+    })
+}
+
 fn inspect_video_frames(
     path: &Path,
     start: f64,
@@ -1476,8 +1630,24 @@ fn composite_frames_jpeg(
 
     let text = project_text(timeline);
     let (sizes, media) = project_media(manifest, project_dir);
-    let metrics = ManifestMetrics { sizes };
-    let plan = build_render_plan(timeline, render_size, &metrics);
+    let straight_alpha = manifest
+        .entries
+        .iter()
+        .filter(|entry| entry.carries_straight_alpha())
+        .map(|entry| entry.id.clone())
+        .collect();
+    let metrics = ManifestMetrics {
+        sizes,
+        straight_alpha,
+    };
+    let plan = try_build_render_plan(timeline, render_size, &metrics)
+        .map_err(|error| BridgeError::new(format!("invalid timeline graph: {error}")))?;
+
+    let project_root = project_dir
+        .as_deref()
+        .map(ProjectRoot::open)
+        .transpose()
+        .map_err(|error| BridgeError::new(format!("open project LUT storage: {error}")))?;
 
     let dev =
         RenderDevice::try_new().map_err(|e| BridgeError::new(format!("no GPU device: {e}")))?;
@@ -1488,6 +1658,8 @@ fn composite_frames_jpeg(
     }
 
     let mut out_frames: Vec<InspectedFrame> = Vec::with_capacity(frames.len());
+    let mut lut_cache = HashMap::new();
+    let mut lottie = crate::render::LottieMaterializer::new();
     for &f in frames {
         let frame_plan = plan.frame(timeline, f);
         let mut resolver = InspectResolver {
@@ -1499,6 +1671,9 @@ fn composite_frames_jpeg(
             text: &text,
             text_rasterizer: &text_rasterizer,
             render_box: (render_size.width, render_size.height),
+            project_root: project_root.as_ref(),
+            lut_cache: &mut lut_cache,
+            lottie: &mut lottie,
         };
         let composite = match compositor.render_to_rgba(
             &dev.device,
@@ -1579,17 +1754,22 @@ struct TextInfo {
 /// `SourceMetrics` backed by the media manifest (intrinsic size only).
 struct ManifestMetrics {
     sizes: HashMap<String, (u32, u32)>,
+    straight_alpha: HashSet<String>,
 }
 
 impl SourceMetrics for ManifestMetrics {
     fn natural_size(&self, media_ref: &str) -> Option<(u32, u32)> {
         self.sizes.get(media_ref).copied()
     }
+
+    fn needs_premultiply(&self, media_ref: &str) -> bool {
+        self.straight_alpha.contains(media_ref)
+    }
 }
 
-/// `TextureResolver` that decodes a layer's pixels on demand via ffmpeg and
-/// uploads them to the GPU. Mirrors the preview / export resolvers; the decode box
-/// is the downscaled inspect render size. Lottie is skipped (returns `None`).
+/// `TextureResolver` that materializes a layer's pixels on demand and uploads
+/// them to the GPU. Video/image use FFmpeg/image decode, text uses the shared
+/// rasterizer, and Lottie uses the same Velato/Vello path as preview/export.
 struct InspectResolver<'d> {
     device: &'d opentake_render::wgpu::Device,
     queue: &'d opentake_render::wgpu::Queue,
@@ -1599,6 +1779,9 @@ struct InspectResolver<'d> {
     text: &'d HashMap<String, TextInfo>,
     text_rasterizer: &'d CosmicTextRasterizer,
     render_box: (u32, u32),
+    project_root: Option<&'d ProjectRoot>,
+    lut_cache: &'d mut HashMap<String, Rc<GpuLutTexture>>,
+    lottie: &'d mut crate::render::LottieMaterializer,
 }
 
 impl InspectResolver<'_> {
@@ -1619,17 +1802,52 @@ impl InspectResolver<'_> {
         let tex = upload_rgba(self.device, self.queue, &frame, false, Some("inspect-text"));
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_managed_lut(
+        &mut self,
+        reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, opentake_render::RenderError> {
+        if let Some(cached) = self.lut_cache.get(&reference.id) {
+            return Ok(Some(cached.clone()));
+        }
+        let resolved = crate::lut::resolve_project_lut(
+            self.project_root,
+            reference,
+            self.device,
+            self.queue,
+            "inspect-lut",
+        )?;
+        if let Some(texture) = &resolved {
+            self.lut_cache.insert(reference.id.clone(), texture.clone());
+        }
+        Ok(resolved)
+    }
 }
 
 impl TextureResolver for InspectResolver<'_> {
     fn resolve(&mut self, source: &TextureSource, source_frame: i64) -> Option<Rc<GpuTexture>> {
+        if let TextureSource::Lottie { media_ref } = source {
+            let info = self.media.get(media_ref)?;
+            return self
+                .lottie
+                .resolve(
+                    self.device,
+                    self.queue,
+                    &mut self.cache,
+                    &info.path,
+                    source_frame,
+                    self.render_box,
+                    "inspect-lottie",
+                )
+                .ok();
+        }
         let (media_ref, key, is_image) = match source {
             TextureSource::Decoded { media_ref } => {
                 (media_ref, format!("v:{media_ref}:{source_frame}"), false)
             }
             TextureSource::Image { media_ref } => (media_ref, format!("i:{media_ref}"), true),
             TextureSource::Text { clip_id } => return self.resolve_text(clip_id),
-            TextureSource::Lottie { .. } => return None,
+            TextureSource::Lottie { .. } => unreachable!("handled above"),
         };
 
         if let Some(tex) = self.cache.get(&key) {
@@ -1662,29 +1880,43 @@ impl TextureResolver for InspectResolver<'_> {
         );
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_lut(
+        &mut self,
+        reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, opentake_render::RenderError> {
+        self.resolve_managed_lut(reference)
+    }
 }
 
 /// Project the timeline's text clips (content + style + box) into the per-clip
 /// lookup the resolver rasterizes from. Keyed by clip id.
 fn project_text(timeline: &opentake_domain::Timeline) -> HashMap<String, TextInfo> {
     let mut text: HashMap<String, TextInfo> = HashMap::new();
-    for track in &timeline.tracks {
-        for clip in &track.clips {
-            if clip.media_type != ClipType::Text {
-                continue;
+    for candidate in std::iter::once(timeline).chain(
+        timeline
+            .nested_sequences
+            .iter()
+            .map(|sequence| &sequence.timeline),
+    ) {
+        for track in &candidate.tracks {
+            for clip in &track.clips {
+                if clip.media_type != ClipType::Text {
+                    continue;
+                }
+                let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
+                    continue;
+                };
+                let tl = clip.transform.top_left();
+                text.insert(
+                    clip.id.clone(),
+                    TextInfo {
+                        content: content.clone(),
+                        style: style.clone(),
+                        box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
+                    },
+                );
             }
-            let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
-                continue;
-            };
-            let tl = clip.transform.top_left();
-            text.insert(
-                clip.id.clone(),
-                TextInfo {
-                    content: content.clone(),
-                    style: style.clone(),
-                    box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
-                },
-            );
         }
     }
     text
@@ -1804,6 +2036,8 @@ mod tests {
                 source_height: None,
                 source_fps: None,
                 has_audio: Some(true),
+                color: None,
+                proxy: None,
                 folder_id: None,
                 cached_remote_url: None,
                 cached_remote_url_expires_at: None,
@@ -1990,6 +2224,123 @@ mod tests {
         );
     }
 
+    fn two_frame_lottie_fixture() -> String {
+        r##"{
+  "v":"5.5.2","fr":2,"ip":0,"op":2,"w":16,"h":16,"ddd":0,"assets":[],
+  "layers":[
+    {"ddd":0,"ind":1,"ty":4,"nm":"red",
+      "ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[8,8,0]},
+             "a":{"a":0,"k":[8,8,0]},"s":{"a":0,"k":[100,100,100]}},
+      "shapes":[
+        {"ty":"rc","d":1,"s":{"a":0,"k":[8,8]},"p":{"a":0,"k":[8,8]},"r":{"a":0,"k":0}},
+        {"ty":"fl","c":{"a":0,"k":[1,0,0,1]},"o":{"a":0,"k":100},"r":1}
+      ],"ao":0,"ip":0,"op":1,"st":0,"bm":0},
+    {"ddd":0,"ind":2,"ty":4,"nm":"green",
+      "ks":{"o":{"a":0,"k":100},"r":{"a":0,"k":0},"p":{"a":0,"k":[8,8,0]},
+             "a":{"a":0,"k":[8,8,0]},"s":{"a":0,"k":[100,100,100]}},
+      "shapes":[
+        {"ty":"rc","d":1,"s":{"a":0,"k":[8,8]},"p":{"a":0,"k":[8,8]},"r":{"a":0,"k":0}},
+        {"ty":"fl","c":{"a":0,"k":[0,1,0,1]},"o":{"a":0,"k":100},"r":1}
+      ],"ao":0,"ip":1,"op":2,"st":0,"bm":0}
+  ]
+}"##
+        .to_string()
+    }
+
+    #[test]
+    fn inspect_media_renders_lottie_frames_over_gray_end_to_end() {
+        let Ok(_) = RenderDevice::try_new() else {
+            return;
+        };
+        let tmp = tempfile::tempdir().expect("create temp root");
+        let bundle = tmp.path().join("InspectLottie.opentake");
+        let project = opentake_project::Project::new(&bundle);
+        project.save().expect("save Lottie project");
+        let source = bundle.join("media/animation.json");
+        std::fs::create_dir_all(source.parent().expect("media parent"))
+            .expect("create media directory");
+        std::fs::write(&source, two_frame_lottie_fixture()).expect("write Lottie fixture");
+        let mut manifest = opentake_domain::MediaManifest::new();
+        manifest.entries.push(opentake_domain::MediaManifestEntry {
+            id: "lottie-asset".into(),
+            name: "animation".into(),
+            kind: ClipType::Lottie,
+            source: MediaSource::Project {
+                relative_path: "media/animation.json".into(),
+            },
+            duration: 1.0,
+            generation_input: None,
+            source_width: Some(16),
+            source_height: Some(16),
+            source_fps: Some(2.0),
+            has_audio: Some(false),
+            color: None,
+            proxy: None,
+            folder_id: None,
+            cached_remote_url: None,
+            cached_remote_url_expires_at: None,
+        });
+        std::fs::write(
+            bundle.join("media.json"),
+            serde_json::to_vec_pretty(&manifest).expect("encode Lottie manifest"),
+        )
+        .expect("write Lottie manifest");
+        let core = AppCore::new();
+        core.open_project(bundle).expect("open Lottie project");
+        let engine = MediaEngine::new(tmp.path().join("cache"), tmp.path().join("models"));
+
+        let result = inspect_source_media(
+            &core,
+            &engine,
+            &InspectMediaRequest {
+                media_ref: "lottie-asset".into(),
+                kind: ClipType::Lottie,
+                start_seconds: None,
+                end_seconds: None,
+                max_frames: 2,
+                overview: false,
+            },
+        )
+        .expect("inspect imported Lottie");
+
+        assert_eq!((result.width, result.height), (Some(16), Some(16)));
+        assert_eq!(result.fps, Some(2.0));
+        assert_eq!(result.duration_seconds, 1.0);
+        assert_eq!(result.frames.len(), 2);
+        assert_eq!(result.frames[0].timestamp_seconds, 0.25);
+        assert_eq!(result.frames[1].timestamp_seconds, 0.75);
+        let decoded = result
+            .frames
+            .iter()
+            .map(|frame| {
+                assert_eq!(frame.media_type, "image/jpeg");
+                image::load_from_memory(&frame.bytes)
+                    .expect("decode inspected Lottie JPEG")
+                    .into_rgb8()
+            })
+            .collect::<Vec<_>>();
+        assert_ne!(decoded[0].as_raw(), decoded[1].as_raw());
+        let first_center = decoded[0].get_pixel(8, 8).0;
+        let second_center = decoded[1].get_pixel(8, 8).0;
+        assert!(first_center[0] > first_center[1] + 80, "{first_center:?}");
+        assert!(
+            second_center[1] > second_center[0] + 80,
+            "{second_center:?}"
+        );
+        for frame in &decoded {
+            let corner = frame.get_pixel(0, 0).0;
+            assert!(
+                (corner[0] as i16 - corner[1] as i16).abs() < 30,
+                "{corner:?}"
+            );
+            assert!(
+                (corner[1] as i16 - corner[2] as i16).abs() < 30,
+                "{corner:?}"
+            );
+            assert!(corner[0] > 80 && corner[0] < 180, "{corner:?}");
+        }
+    }
+
     #[test]
     fn inspect_media_overview_encodes_the_expected_storyboard_grid() {
         let frames = (0..7)
@@ -2727,6 +3078,8 @@ mod tests {
             source_height: Some(h),
             source_fps: Some(30.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/src-tauri/src/media.rs b/src-tauri/src/media.rs
index b47a39e5..3ef57cac 100644
--- a/src-tauri/src/media.rs
+++ b/src-tauri/src/media.rs
@@ -24,34 +24,45 @@
 
 use std::collections::{BTreeSet, HashSet};
 use std::path::{Path, PathBuf};
-use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex};
 
 use image::ImageEncoder;
 use serde::Serialize;
-use tauri::{AppHandle, State};
+use tauri::{AppHandle, Emitter, Manager, Runtime, State};
 
 use opentake_core::{
     importable_clip_type, AppCore, CommittedMediaImport, CoreError, DeferredCoreEvents,
-    PreparedMediaFolderRef, PreparedMediaImportOp, ProbedMedia,
+    DerivedStemProvenance, PreparedMediaFolderRef, PreparedMediaImportOp, ProbedMedia,
 };
 use opentake_domain::{
-    ClipType, GenerationInput, GenerationJobStatus, MediaManifest, MediaManifestEntry, MediaSource,
-    Timeline,
+    AudioDenoise, Clip, ClipType, DenoiseMode, GenerationInput, GenerationJobStatus,
+    LoudnessNormalization, MediaManifest, MediaManifestEntry, MediaProxy, MediaSource,
+    StabilizationTrack, Timeline,
 };
 use opentake_media::library::{FavoriteRequest, LibraryStore, PreparedFavorite};
 #[cfg(test)]
 use opentake_media::MediaCancelToken;
 use opentake_media::{
+    analysis::{
+        analyze_loudness_with_progress, analyze_stabilization as build_stabilization,
+        denoise_interleaved, separate_stems, track_translation_motion, LoudnessNormalizationConfig,
+        StabilizationConfig, StemExecution, StemSeparationRequest,
+    },
     cache_key::visual_file_identity_key,
-    decode_frame_at, decode_frame_at_cancellable, decode_frames_at,
+    create_proxy, decode_frame_at, decode_frame_at_cancellable, decode_frames_at,
+    decode_frames_at_cancellable, extract_pcm_cancellable_with_progress,
     thumbnail::{
         encode_sprite, representative_thumbnail_times, save_sprite, sprite::grid_geometry,
         video_thumbnail_times, EncodedSpriteArtifact, ThumbnailCacheMeta, VideoThumb,
         MAX_VIDEO_THUMBNAILS, THUMB_MAX_SIZE, THUMB_TOLERANCE_SECS,
     },
     waveform::store::CACHE_SUBDIR,
-    FrameRequest, MediaEngine, MediaError, RgbaFrame,
+    FrameRequest, MediaEngine, MediaError, PcmFormat, PcmSpec, ProxyProgressCallback, ProxyRequest,
+    RgbaFrame,
 };
+use opentake_ops::{ClipEntry, EditCommand};
+use opentake_project::ProjectRoot;
 
 use crate::library::LibraryState;
 
@@ -64,6 +75,244 @@ pub struct MediaState {
     engine: MediaEngine,
 }
 
+/// Single-flight cooperative cancellation for an Inspector stabilization run.
+#[derive(Default)]
+pub struct StabilizationAnalysisState {
+    active: Mutex<Option<opentake_media::MediaCancelToken>>,
+}
+
+/// Single-flight cooperative cancellation for an Inspector loudness run.
+#[derive(Default)]
+pub struct LoudnessAnalysisState {
+    active: Mutex<Option<opentake_media::MediaCancelToken>>,
+}
+
+/// Single-flight cooperative cancellation for an Inspector denoise validation.
+#[derive(Default)]
+pub struct DenoiseAnalysisState {
+    active: Mutex<Option<opentake_media::MediaCancelToken>>,
+}
+
+/// Single-flight cooperative cancellation for a two-stem separation job.
+#[derive(Default)]
+pub struct StemSeparationState {
+    active: Mutex<Option<opentake_media::MediaCancelToken>>,
+}
+
+/// Single-flight proxy transcode plus the app-level playback preference. The
+/// preference is mirrored from localStorage at startup; it changes playback
+/// source selection only and never changes export resolution.
+#[derive(Default)]
+pub struct MediaProxyState {
+    active: Mutex<Option<opentake_media::MediaCancelToken>>,
+    enabled: AtomicBool,
+}
+
+impl MediaProxyState {
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("media_proxy_busy".to_string());
+        }
+        let token = opentake_media::MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &opentake_media::MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    pub(crate) fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+
+    pub(crate) fn enabled(&self) -> bool {
+        self.enabled.load(Ordering::Acquire)
+    }
+
+    fn set_enabled(&self, enabled: bool) {
+        self.enabled.store(enabled, Ordering::Release);
+    }
+}
+
+impl StemSeparationState {
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("stem_separation_busy".to_string());
+        }
+        let token = opentake_media::MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &opentake_media::MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+}
+
+impl DenoiseAnalysisState {
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("denoise_analysis_busy".to_string());
+        }
+        let token = opentake_media::MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &opentake_media::MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+}
+
+impl LoudnessAnalysisState {
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("loudness_analysis_busy".to_string());
+        }
+        let token = opentake_media::MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &opentake_media::MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        active.as_ref().is_some_and(|token| {
+            token.cancel();
+            true
+        })
+    }
+}
+
+impl StabilizationAnalysisState {
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active.is_some() {
+            return Err("a stabilization analysis is already running".to_string());
+        }
+        let token = opentake_media::MediaCancelToken::new();
+        *active = Some(token.clone());
+        Ok(token)
+    }
+
+    fn finish(&self, token: &opentake_media::MediaCancelToken) {
+        let mut active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if active
+            .as_ref()
+            .is_some_and(|current| current.same_instance(token))
+        {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        let active = self
+            .active
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner());
+        if let Some(token) = active.as_ref() {
+            token.cancel();
+            true
+        } else {
+            false
+        }
+    }
+}
+
 impl MediaState {
     /// Wrap an engine for managed state.
     pub fn new(engine: MediaEngine) -> Self {
@@ -96,11 +345,21 @@ pub struct MediaItemDto {
     pub width: Option<i32>,
     /// Source height in pixels, when known.
     pub height: Option<i32>,
+    /// Probed source frame rate, used by the first-video settings decision.
+    pub source_fps: Option<f64>,
     /// Whether the asset carries audio.
     pub has_audio: bool,
-    /// Absolute path to the source file, when resolvable (external assets only
-    /// in this phase, which is all importing produces).
+    /// Original source color signalling retained for HDR-aware UI.
+    pub color: Option<opentake_domain::MediaColorMetadata>,
+    /// True for PQ/HLG sources. The current compositor delivers SDR BT.709.
+    pub is_hdr: bool,
+    /// Absolute path to the source file, when resolvable. Project-relative
+    /// derived assets are resolved against the open project bundle.
     pub path: Option<String>,
+    /// Absolute project-local playback proxy path when one is materialized.
+    pub proxy_path: Option<String>,
+    pub proxy_width: Option<u32>,
+    pub proxy_height: Option<u32>,
     /// On-disk thumbnail path, or `None` to render a type placeholder.
     pub thumbnail: Option<String>,
     /// Library folder this asset lives in (`None` = root), for the folder view.
@@ -143,12 +402,13 @@ impl MediaItemDto {
         favorite: bool,
     ) -> Self {
         let resolved = resolve_source_path(entry, project_dir);
-        let path = match &entry.source {
-            MediaSource::External { absolute_path } => Some(absolute_path.clone()),
-            // Project-relative assets need the bundle base to resolve; not
-            // produced by importing (always external) but handled for safety.
-            MediaSource::Project { .. } => None,
-        };
+        let path = resolved
+            .as_deref()
+            .map(|path| path.to_string_lossy().into_owned());
+        let resolved_proxy = entry
+            .proxy
+            .as_ref()
+            .and_then(|proxy| trusted_project_proxy_path(project_dir?, &proxy.relative_path));
         let generation_input = entry.generation_input.as_ref();
         let generation_status = match generation_input.and_then(|input| input.status) {
             Some(GenerationJobStatus::Queued | GenerationJobStatus::Generating) => "generating",
@@ -198,8 +458,16 @@ impl MediaItemDto {
             duration: entry.duration,
             width: entry.source_width,
             height: entry.source_height,
+            source_fps: entry.source_fps,
             has_audio: entry.has_audio.unwrap_or(false),
+            color: entry.color.clone(),
+            is_hdr: entry.color.as_ref().is_some_and(|color| color.is_hdr()),
             path,
+            proxy_path: resolved_proxy
+                .as_ref()
+                .map(|path| path.to_string_lossy().into_owned()),
+            proxy_width: entry.proxy.as_ref().map(|proxy| proxy.width),
+            proxy_height: entry.proxy.as_ref().map(|proxy| proxy.height),
             thumbnail,
             folder_id: entry.folder_id.clone(),
             file_size,
@@ -721,6 +989,7 @@ fn probe_media(engine: &MediaEngine, path: &Path) -> ProbedMedia {
             height: p.height.map(|h| h as i32),
             fps: p.fps,
             has_audio: p.has_audio,
+            color: p.color,
         },
         Err(_) => ProbedMedia::default(),
     }
@@ -759,6 +1028,7 @@ impl SavedMediaMetadata {
                     height: Some(height),
                     fps: Some(f64::from(summary.fps)),
                     has_audio: summary.has_audio,
+                    color: None,
                 })
             }
             Self::Wav {
@@ -774,6 +1044,7 @@ impl SavedMediaMetadata {
                     height: None,
                     fps: None,
                     has_audio: true,
+                    color: None,
                 })
             }
         }
@@ -1336,8 +1607,14 @@ fn import_media_impl(
 
 /// `get_media`: the current media catalog for the panel. Infallible.
 #[tauri::command]
-pub fn get_media(core: State<'_, AppCore>, media: State<'_, MediaState>) -> MediaListDto {
-    MediaListDto::from_core(&core, Some(media.engine().cache_root()))
+pub fn get_media(
+    app: AppHandle,
+    core: State<'_, AppCore>,
+    media: State<'_, MediaState>,
+) -> MediaListDto {
+    let mut catalog = MediaListDto::from_core(&core, Some(media.engine().cache_root()));
+    grant_catalog_proxy_asset_scope(&app, &mut catalog);
+    catalog
 }
 
 /// Persist one project asset in the content-addressed global library and mirror
@@ -2057,26 +2334,19 @@ fn save_clip_as_media_workflow(
             SavedMediaMetadata::Video(summary)
         }
         "wav" => {
-            let pcm = crate::export::mix_timeline_audio_for_manifest_with_control(
+            let mut writer = output.writer()?;
+            let sample_count = crate::export::write_timeline_audio_wav_for_manifest_with_control(
                 &single_timeline,
                 &subset,
                 &project_dir_option,
+                &mut writer,
                 control,
                 Some(Arc::clone(&on_progress)),
             )?
             .ok_or_else(|| "audio clip contains no decodable audio".to_string())?;
-            let mut writer = output.writer()?;
-            crate::export::write_wav_s16le_cancellable_to_file(
-                &pcm.samples_f32,
-                pcm.spec.sample_rate,
-                &mut writer,
-                guard.cancel_token(),
-                Some(on_progress.as_ref()),
-                None,
-            )?;
             SavedMediaMetadata::Wav {
-                sample_count: pcm.samples_f32.len(),
-                sample_rate: pcm.spec.sample_rate,
+                sample_count,
+                sample_rate: opentake_media::encode::MIX_SAMPLE_RATE,
             }
         }
         _ => unreachable!("save clip extension is fixed by clip type"),
@@ -2196,6 +2466,7 @@ pub fn extract_audio(
 /// entry. Returns the updated catalog (with `missing` recomputed → now `false`).
 #[tauri::command]
 pub fn relink_media(
+    app: AppHandle,
     core: State<'_, AppCore>,
     media: State<'_, MediaState>,
     media_ref: String,
@@ -2205,11 +2476,13 @@ pub fn relink_media(
     if !new.is_file() {
         return Err(format!("file not found: {new_path}"));
     }
+    let _identity = core.lock_project_identity_workflow();
     // Validate the target type matches before touching the catalog (upstream
     // rejects relinking across types). `relink_media_file` re-checks, but doing
     // it here yields a precise message and avoids a needless probe.
-    let manifest = core.media();
-    let entry = manifest
+    let snapshot = core.runtime_snapshot();
+    let entry = snapshot
+        .media
         .entries
         .iter()
         .find(|e| e.id == media_ref)
@@ -2224,8 +2497,28 @@ pub fn relink_media(
     }
 
     let probe = probe_media(media.engine(), &new);
+    let old_proxy = entry.proxy.clone();
+    if old_proxy.is_some() {
+        let project_dir = snapshot
+            .project_dir
+            .as_deref()
+            .ok_or_else(|| "media_proxy_project_must_be_saved".to_string())?;
+        let project_root = ProjectRoot::open(project_dir).map_err(|error| error.to_string())?;
+        core.ensure_project_root_identity_for_project(
+            snapshot.project_epoch,
+            project_dir,
+            project_root.identity(),
+        )
+        .map_err(|error| error.to_string())?;
+    }
     core.relink_media_file(&media_ref, &new, &probe)
         .map_err(|e| e.to_string())?;
+    if let (Some(project_dir), Some(proxy)) = (snapshot.project_dir, old_proxy) {
+        if let Some(path) = trusted_project_proxy_path(&project_dir, &proxy.relative_path) {
+            let _ = std::fs::remove_file(&path);
+            revoke_proxy_asset_file(&app, &path);
+        }
+    }
     Ok(MediaListDto::from_core(
         &core,
         Some(media.engine().cache_root()),
@@ -2519,6 +2812,1049 @@ pub fn get_waveform(
     })
 }
 
+/// Analyze one video clip into a source-bound editable stabilization track.
+/// Decoding is bounded to at most 48 downscaled frames; the source file is
+/// strictly read-only and the caller applies the returned solution separately
+/// through `edit_apply`.
+#[tauri::command]
+pub async fn analyze_stabilization(
+    app: AppHandle,
+    clip_id: String,
+) -> Result<StabilizationTrack, String> {
+    let cancel = app.state::<StabilizationAnalysisState>().begin()?;
+    let prepared = (|| {
+        let snapshot = app.state::<AppCore>().runtime_snapshot();
+        let clip = find_runtime_clip(&snapshot.timeline, &clip_id)
+            .ok_or_else(|| format!("clip not found: {clip_id}"))?;
+        if clip.media_type != ClipType::Video || clip.nested_sequence_id.is_some() {
+            return Err("stabilization requires an ordinary video clip".to_string());
+        }
+        let (path, is_video) =
+            crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)?;
+        if !is_video {
+            return Err("stabilization source is not a video".to_string());
+        }
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        let sample_count = (clip.duration_frames.max(2) as usize).min(48);
+        let last_relative_frame = (clip.duration_frames - 1).max(1);
+        let relative_frames = (0..sample_count)
+            .map(|index| {
+                ((index as f64 * last_relative_frame as f64 / (sample_count - 1) as f64).round()
+                    as i32)
+                    .clamp(0, last_relative_frame)
+            })
+            .collect::<Vec<_>>();
+        let source_start = clip.trim_start_frame as f64 / fps;
+        let times = relative_frames
+            .iter()
+            .map(|frame| source_start + *frame as f64 * clip.speed.max(0.0001) / fps)
+            .collect::<Vec<_>>();
+        Ok((
+            path,
+            times,
+            relative_frames,
+            source_start,
+            fps,
+            clip.speed,
+            last_relative_frame,
+            clip.media_ref.clone(),
+        ))
+    })();
+
+    let result = match prepared {
+        Err(error) => Err(error),
+        Ok((
+            path,
+            times,
+            relative_frames,
+            source_start,
+            fps,
+            speed,
+            last_relative_frame,
+            source_identity,
+        )) => {
+            let worker_cancel = cancel.clone();
+            match tauri::async_runtime::spawn_blocking(move || {
+                let request = FrameRequest {
+                    max_size: (320, 180),
+                    tolerance_secs: 0.1,
+                    ..FrameRequest::default()
+                };
+                let decoded = decode_frames_at_cancellable(&path, &times, &request, &worker_cancel);
+                let mut frames = decoded
+                    .into_iter()
+                    .filter_map(|result| result.ok())
+                    .map(|(actual, frame)| {
+                        let relative =
+                            ((actual - source_start) * fps / speed.max(0.0001)).round() as i32;
+                        (relative.clamp(0, last_relative_frame), frame)
+                    })
+                    .collect::<Vec<_>>();
+                if frames.len() < relative_frames.len() && worker_cancel.is_cancelled() {
+                    return Err(MediaError::Cancelled.to_string());
+                }
+                frames.sort_by_key(|(frame, _)| *frame);
+                frames.dedup_by_key(|(frame, _)| *frame);
+                let motion = track_translation_motion(&frames, &worker_cancel)
+                    .map_err(|error| error.to_string())?;
+                build_stabilization(
+                    &motion,
+                    source_identity,
+                    StabilizationConfig::default(),
+                    &worker_cancel,
+                )
+                .map_err(|error| error.to_string())
+            })
+            .await
+            {
+                Ok(result) => result,
+                Err(error) => Err(format!("stabilization analysis task failed: {error}")),
+            }
+        }
+    };
+    app.state::<StabilizationAnalysisState>().finish(&cancel);
+    result
+}
+
+#[tauri::command]
+pub fn cancel_stabilization_analysis(analysis: State<'_, StabilizationAnalysisState>) -> bool {
+    analysis.cancel()
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct LoudnessProgressEvent {
+    clip_id: String,
+    done: usize,
+    total: usize,
+}
+
+/// Analyze the selected clip's exact visible source window. The returned value
+/// is applied in a separate `edit_apply` call so analysis failures never mutate
+/// project history and a successful apply remains one undoable transaction.
+#[tauri::command]
+pub async fn analyze_loudness(
+    app: AppHandle,
+    clip_id: String,
+    target_lufs: f64,
+    true_peak_ceiling_dbtp: f64,
+) -> Result<LoudnessNormalization, String> {
+    let cancel = app.state::<LoudnessAnalysisState>().begin()?;
+    let prepared = (|| {
+        let snapshot = app.state::<AppCore>().runtime_snapshot();
+        let clip = find_runtime_clip(&snapshot.timeline, &clip_id)
+            .ok_or_else(|| format!("loudness_clip_not_found: {clip_id}"))?;
+        if !matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+            || clip.nested_sequence_id.is_some()
+        {
+            return Err(
+                "loudness_unreadable_audio: requires an ordinary audio-bearing clip".to_string(),
+            );
+        }
+        let (path, _) = crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+            .map_err(|error| format!("loudness_unreadable_audio: {error}"))?;
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        let start = clip.trim_start_frame.max(0) as f64 / fps;
+        let duration = clip.source_frames_consumed().max(0) as f64 / fps;
+        if duration <= 0.0 {
+            return Err("loudness_unreadable_audio: clip has no visible duration".to_string());
+        }
+        if duration > 600.0 {
+            return Err(
+                "loudness_audio_too_long: analysis is limited to 10 minutes per clip".to_string(),
+            );
+        }
+        Ok((path, (start, start + duration)))
+    })();
+
+    let result = match prepared {
+        Err(error) => Err(error),
+        Ok((path, range)) => {
+            let worker_cancel = cancel.clone();
+            let worker_app = app.clone();
+            let worker_clip_id = clip_id.clone();
+            match tauri::async_runtime::spawn_blocking(move || {
+                const ANALYSIS_SAMPLE_RATE: u32 = 48_000;
+                let decode_app = worker_app.clone();
+                let decode_clip_id = worker_clip_id.clone();
+                let decode_progress = Arc::new(move |done: usize, total: usize| {
+                    let mapped = done.min(total.max(1)).saturating_mul(60) / total.max(1);
+                    let _ = decode_app.emit(
+                        "loudness://progress",
+                        LoudnessProgressEvent {
+                            clip_id: decode_clip_id.clone(),
+                            done: mapped,
+                            total: 100,
+                        },
+                    );
+                });
+                let pcm = extract_pcm_cancellable_with_progress(
+                    &path,
+                    &PcmSpec {
+                        sample_rate: ANALYSIS_SAMPLE_RATE,
+                        channels: 1,
+                        format: PcmFormat::F32,
+                    },
+                    Some(range),
+                    &worker_cancel,
+                    Some(decode_progress),
+                )
+                .map_err(|error| match error {
+                    MediaError::Cancelled => "loudness_cancelled".to_string(),
+                    other => format!("loudness_unreadable_audio: {other}"),
+                })?;
+                let analysis_app = worker_app.clone();
+                let analysis_clip_id = worker_clip_id.clone();
+                let analysis_progress = Arc::new(move |done: usize, total: usize| {
+                    let mapped = 60 + done.min(total.max(1)).saturating_mul(40) / total.max(1);
+                    let _ = analysis_app.emit(
+                        "loudness://progress",
+                        LoudnessProgressEvent {
+                            clip_id: analysis_clip_id.clone(),
+                            done: mapped,
+                            total: 100,
+                        },
+                    );
+                });
+                let measured = analyze_loudness_with_progress(
+                    &pcm.samples_f32,
+                    ANALYSIS_SAMPLE_RATE,
+                    LoudnessNormalizationConfig {
+                        target_lufs,
+                        true_peak_ceiling_dbtp,
+                    },
+                    &worker_cancel,
+                    Some(analysis_progress),
+                )
+                .map_err(|error| error.to_string())?;
+                Ok(LoudnessNormalization {
+                    target_lufs: measured.target_lufs,
+                    true_peak_ceiling_dbtp: measured.true_peak_ceiling_dbtp,
+                    input_integrated_lufs: measured.input_integrated_lufs,
+                    input_true_peak_dbtp: measured.input_true_peak_dbtp,
+                    gain_db: measured.gain_db,
+                    output_integrated_lufs: measured.output_integrated_lufs,
+                    output_true_peak_dbtp: measured.output_true_peak_dbtp,
+                })
+            })
+            .await
+            {
+                Ok(result) => result,
+                Err(error) => Err(format!("loudness_analysis_task_failed: {error}")),
+            }
+        }
+    };
+    app.state::<LoudnessAnalysisState>().finish(&cancel);
+    result
+}
+
+#[tauri::command]
+pub fn cancel_loudness_analysis(analysis: State<'_, LoudnessAnalysisState>) -> bool {
+    analysis.cancel()
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DenoiseProgressEvent {
+    clip_id: String,
+    done: usize,
+    total: usize,
+}
+
+/// Decode and process the exact visible source window before an Inspector apply.
+/// The processed copy is discarded: success proves the configured operation is
+/// runnable, while the source stays immutable and the separate edit command is
+/// the only history mutation.
+#[tauri::command]
+pub async fn prepare_denoise(
+    app: AppHandle,
+    clip_id: String,
+    mode: DenoiseMode,
+    strength: f64,
+    preview_enabled: bool,
+) -> Result<AudioDenoise, String> {
+    let cancel = app.state::<DenoiseAnalysisState>().begin()?;
+    let config = AudioDenoise {
+        mode,
+        strength,
+        preview_enabled,
+    };
+    let prepared = (|| {
+        config
+            .validate()
+            .map_err(|error| format!("denoise_invalid_config: {error}"))?;
+        let snapshot = app.state::<AppCore>().runtime_snapshot();
+        let clip = find_runtime_clip(&snapshot.timeline, &clip_id)
+            .ok_or_else(|| format!("denoise_clip_not_found: {clip_id}"))?;
+        if !matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+            || clip.nested_sequence_id.is_some()
+        {
+            return Err(
+                "denoise_unreadable_audio: requires an ordinary audio-bearing clip".to_string(),
+            );
+        }
+        let (path, _) = crate::transcribe::resolve_asset_from_snapshot(&snapshot, &clip.media_ref)
+            .map_err(|error| format!("denoise_unreadable_audio: {error}"))?;
+        let fps = snapshot.timeline.fps.max(1) as f64;
+        let start = clip.trim_start_frame.max(0) as f64 / fps;
+        let duration = clip.source_frames_consumed().max(0) as f64 / fps;
+        if duration <= 0.0 {
+            return Err("denoise_unreadable_audio: clip has no visible duration".to_string());
+        }
+        if duration > 600.0 {
+            return Err(
+                "denoise_audio_too_long: validation is limited to 10 minutes per clip".to_string(),
+            );
+        }
+        Ok((path, (start, start + duration)))
+    })();
+
+    let result = match prepared {
+        Err(error) => Err(error),
+        Ok((path, range)) => {
+            let worker_cancel = cancel.clone();
+            let worker_app = app.clone();
+            let worker_clip_id = clip_id.clone();
+            match tauri::async_runtime::spawn_blocking(move || {
+                const SAMPLE_RATE: u32 = 48_000;
+                let decode_app = worker_app.clone();
+                let decode_clip_id = worker_clip_id.clone();
+                let decode_progress = Arc::new(move |done: usize, total: usize| {
+                    let mapped = done.min(total.max(1)).saturating_mul(60) / total.max(1);
+                    let _ = decode_app.emit(
+                        "denoise://progress",
+                        DenoiseProgressEvent {
+                            clip_id: decode_clip_id.clone(),
+                            done: mapped,
+                            total: 100,
+                        },
+                    );
+                });
+                let pcm = extract_pcm_cancellable_with_progress(
+                    &path,
+                    &PcmSpec {
+                        sample_rate: SAMPLE_RATE,
+                        channels: 1,
+                        format: PcmFormat::F32,
+                    },
+                    Some(range),
+                    &worker_cancel,
+                    Some(decode_progress),
+                )
+                .map_err(|error| match error {
+                    MediaError::Cancelled => "denoise_cancelled".to_string(),
+                    other => format!("denoise_unreadable_audio: {other}"),
+                })?;
+                let process_app = worker_app.clone();
+                let process_clip_id = worker_clip_id.clone();
+                let process_progress = Arc::new(move |done: usize, total: usize| {
+                    let mapped = 60 + done.min(total.max(1)).saturating_mul(40) / total.max(1);
+                    let _ = process_app.emit(
+                        "denoise://progress",
+                        DenoiseProgressEvent {
+                            clip_id: process_clip_id.clone(),
+                            done: mapped,
+                            total: 100,
+                        },
+                    );
+                });
+                let _processed = denoise_interleaved(
+                    &pcm.samples_f32,
+                    1,
+                    SAMPLE_RATE,
+                    config,
+                    &worker_cancel,
+                    Some(process_progress),
+                )
+                .map_err(|error| error.to_string())?;
+                Ok(config)
+            })
+            .await
+            {
+                Ok(result) => result,
+                Err(error) => Err(format!("denoise_analysis_task_failed: {error}")),
+            }
+        }
+    };
+    app.state::<DenoiseAnalysisState>().finish(&cancel);
+    result
+}
+
+#[tauri::command]
+pub fn cancel_denoise_analysis(analysis: State<'_, DenoiseAnalysisState>) -> bool {
+    analysis.cancel()
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct StemProgressEvent {
+    source_asset_id: String,
+    done: usize,
+    total: usize,
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StemSeparationDto {
+    pub vocals_asset_id: String,
+    pub accompaniment_asset_id: String,
+    pub source_sha256: String,
+    pub execution: String,
+    pub model_sha256: Option<String>,
+    pub vocal_sdr_improvement_db: f64,
+}
+
+/// Run local stem separation off the UI thread, import both outputs atomically,
+/// and persist their source/model provenance. Hosted mode is fail-closed until
+/// a concrete provider adapter is configured; no upload occurs in this command.
+#[tauri::command]
+pub async fn separate_audio_stems(
+    app: AppHandle,
+    source_asset_id: String,
+    execution: String,
+    provider: Option<String>,
+    model: Option<String>,
+    upload_confirmed: bool,
+) -> Result<StemSeparationDto, String> {
+    if execution != "local" {
+        if provider.as_deref().is_none_or(str::is_empty)
+            || model.as_deref().is_none_or(str::is_empty)
+        {
+            return Err("stem_hosted_provider_and_model_required".to_string());
+        }
+        if !upload_confirmed {
+            return Err("stem_hosted_privacy_confirmation_required".to_string());
+        }
+        return Err("stem_hosted_provider_not_configured".to_string());
+    }
+
+    let cancel = app.state::<StemSeparationState>().begin()?;
+    let result = async {
+        let core = app.state::<AppCore>();
+        core.ensure_project_mutable()
+            .map_err(|error| error.to_string())?;
+        let snapshot = core.runtime_snapshot();
+        let project_dir = snapshot
+            .project_dir
+            .clone()
+            .ok_or_else(|| "stem_project_must_be_saved".to_string())?;
+        let source_entry = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == source_asset_id)
+            .cloned()
+            .ok_or_else(|| format!("stem_source_not_found:{source_asset_id}"))?;
+        if !matches!(source_entry.kind, ClipType::Audio | ClipType::Video)
+            || !source_entry
+                .has_audio
+                .unwrap_or(source_entry.kind == ClipType::Audio)
+        {
+            return Err("stem_source_has_no_audio".to_string());
+        }
+        let source_path = source_path_for_entry(&source_entry, Some(&project_dir))?;
+        if !source_path.is_file() {
+            return Err("stem_source_unreadable".to_string());
+        }
+        let output_dir = project_dir
+            .join("media")
+            .join(format!("stems-{}", uuid::Uuid::new_v4()));
+        let model_dir = app
+            .state::<MediaState>()
+            .engine()
+            .models_dir()
+            .to_path_buf();
+        let worker_app = app.clone();
+        let worker_asset_id = source_asset_id.clone();
+        let worker_cancel = cancel.clone();
+        let worker_output_dir = output_dir.clone();
+        let separated = match tauri::async_runtime::spawn_blocking(move || {
+            let progress_app = worker_app.clone();
+            let progress_asset_id = worker_asset_id.clone();
+            let progress = Arc::new(move |done: usize, total: usize| {
+                let _ = progress_app.emit(
+                    "stems://progress",
+                    StemProgressEvent {
+                        source_asset_id: progress_asset_id.clone(),
+                        done,
+                        total,
+                    },
+                );
+            });
+            separate_stems(
+                StemSeparationRequest {
+                    source: &source_path,
+                    output_dir: &worker_output_dir,
+                    execution: StemExecution::Local {
+                        model_dir: &model_dir,
+                    },
+                },
+                &worker_cancel,
+                Some(progress),
+            )
+        })
+        .await
+        {
+            Ok(Ok(result)) => result,
+            Ok(Err(MediaError::Cancelled)) => {
+                let _ = std::fs::remove_dir_all(&output_dir);
+                return Err("stem_separation_cancelled".to_string());
+            }
+            Ok(Err(error)) => {
+                let _ = std::fs::remove_dir_all(&output_dir);
+                return Err(format!("stem_separation_failed:{error}"));
+            }
+            Err(error) => {
+                let _ = std::fs::remove_dir_all(&output_dir);
+                return Err(format!("stem_separation_task_failed:{error}"));
+            }
+        };
+        if cancel.is_cancelled() {
+            let _ = std::fs::remove_dir_all(&output_dir);
+            return Err("stem_separation_cancelled".to_string());
+        }
+        let media = app.state::<MediaState>();
+        let vocals_probe = probe_media(media.engine(), &separated.vocals.path);
+        let accompaniment_probe = probe_media(media.engine(), &separated.accompaniment.path);
+        if !vocals_probe.has_audio || !accompaniment_probe.has_audio {
+            let _ = std::fs::remove_dir_all(&output_dir);
+            return Err("stem_output_probe_failed".to_string());
+        }
+        let common = |stem: &str| DerivedStemProvenance {
+            source_asset_id: source_asset_id.clone(),
+            source_sha256: separated.provenance.source_sha256.clone(),
+            execution: separated.provenance.execution.clone(),
+            model_sha256: separated.provenance.model_sha256.clone(),
+            stem: stem.to_string(),
+        };
+        let committed = core
+            .import_media_batch_for_project_persisted(
+                snapshot.project_epoch,
+                &project_dir,
+                vec![
+                    PreparedMediaImportOp::ImportDerivedStem {
+                        path: separated.vocals.path.clone(),
+                        name: separated.vocals.name.clone(),
+                        probe: vocals_probe,
+                        provenance: common("vocals"),
+                    },
+                    PreparedMediaImportOp::ImportDerivedStem {
+                        path: separated.accompaniment.path.clone(),
+                        name: separated.accompaniment.name.clone(),
+                        probe: accompaniment_probe,
+                        provenance: common("accompaniment"),
+                    },
+                ],
+            )
+            .map_err(|error| {
+                let _ = std::fs::remove_dir_all(&output_dir);
+                format!("stem_import_failed:{error}")
+            })?;
+        if committed.len() != 2 {
+            return Err("stem_import_incomplete".to_string());
+        }
+        Ok(StemSeparationDto {
+            vocals_asset_id: committed[0].entry.id.clone(),
+            accompaniment_asset_id: committed[1].entry.id.clone(),
+            source_sha256: separated.provenance.source_sha256,
+            execution: separated.provenance.execution,
+            model_sha256: separated.provenance.model_sha256,
+            vocal_sdr_improvement_db: separated.metrics.vocal_sdr_improvement_db,
+        })
+    }
+    .await;
+    app.state::<StemSeparationState>().finish(&cancel);
+    result
+}
+
+#[tauri::command]
+pub fn cancel_stem_separation(state: State<'_, StemSeparationState>) -> bool {
+    state.cancel()
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ImportStemsToTracksDto {
+    pub clip_ids: Vec<String>,
+    pub action_name: String,
+}
+
+/// Place an already reviewed aligned stem pair on separate fresh audio tracks
+/// as one undoable edit. The derived media remain reusable in the catalog when
+/// the placement is undone.
+#[tauri::command]
+pub fn import_stems_to_tracks(
+    core: State<'_, AppCore>,
+    vocals_asset_id: String,
+    accompaniment_asset_id: String,
+    start_frame: i32,
+) -> Result<ImportStemsToTracksDto, String> {
+    import_stems_to_tracks_core(&core, vocals_asset_id, accompaniment_asset_id, start_frame)
+}
+
+fn import_stems_to_tracks_core(
+    core: &AppCore,
+    vocals_asset_id: String,
+    accompaniment_asset_id: String,
+    start_frame: i32,
+) -> Result<ImportStemsToTracksDto, String> {
+    if start_frame < 0 || vocals_asset_id == accompaniment_asset_id {
+        return Err("stem_track_import_invalid_arguments".to_string());
+    }
+    let snapshot = core.runtime_snapshot();
+    let find = |id: &str, expected_stem: &str| {
+        let entry = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == id)
+            .ok_or_else(|| format!("stem_track_import_asset_not_found:{id}"))?;
+        if entry.kind != ClipType::Audio
+            || entry
+                .generation_input
+                .as_ref()
+                .is_none_or(|input| input.prompt != format!("stem:{expected_stem}"))
+        {
+            return Err(format!("stem_track_import_asset_invalid:{id}"));
+        }
+        Ok(entry)
+    };
+    let vocals = find(&vocals_asset_id, "vocals")?;
+    let accompaniment = find(&accompaniment_asset_id, "accompaniment")?;
+    let fps = snapshot.timeline.fps.max(1) as f64;
+    let vocals_duration = (vocals.duration * fps).round().max(1.0) as i32;
+    let accompaniment_duration = (accompaniment.duration * fps).round().max(1.0) as i32;
+    if (vocals_duration - accompaniment_duration).abs() > 1 {
+        return Err("stem_track_import_duration_mismatch".to_string());
+    }
+    let duration_frames = vocals_duration.max(accompaniment_duration);
+    let entry = |media_ref: String| ClipEntry {
+        media_ref,
+        media_type: ClipType::Audio,
+        source_clip_type: ClipType::Audio,
+        track_index: 0,
+        start_frame,
+        duration_frames,
+        trim_start_frame: None,
+        trim_end_frame: None,
+        has_audio: true,
+        add_linked_audio: false,
+        transform: None,
+    };
+    let result = core
+        .apply_at_revision(
+            opentake_core::ProjectRevision {
+                project_epoch: snapshot.project_epoch,
+                version: snapshot.version,
+            },
+            EditCommand::AddClipsToSeparateAutoTracks {
+                entries: vec![entry(vocals_asset_id), entry(accompaniment_asset_id)],
+            },
+        )
+        .map_err(|error| error.to_string())?;
+    Ok(ImportStemsToTracksDto {
+        clip_ids: result.affected_clip_ids,
+        action_name: result.action_name,
+    })
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MediaProxyProgressEvent {
+    asset_id: String,
+    done: usize,
+    total: usize,
+}
+
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MediaProxyDto {
+    pub asset_id: String,
+    pub path: String,
+    pub source_sha256: String,
+    pub width: u32,
+    pub height: u32,
+}
+
+fn resolved_project_proxy_path(project_dir: &Path, relative_path: &str) -> Option<PathBuf> {
+    let relative = Path::new(relative_path);
+    if relative.is_absolute() {
+        return None;
+    }
+    let components: Vec<_> = relative.components().collect();
+    if components.len() != 3
+        || components[0] != std::path::Component::Normal(std::ffi::OsStr::new("media"))
+        || components[1] != std::path::Component::Normal(std::ffi::OsStr::new("proxies"))
+        || !matches!(components[2], std::path::Component::Normal(_))
+        || relative
+            .extension()
+            .and_then(|extension| extension.to_str())
+            != Some("mp4")
+    {
+        return None;
+    }
+    Some(project_dir.join(relative))
+}
+
+fn metadata_is_symlink_or_reparse(metadata: &std::fs::Metadata) -> bool {
+    if metadata.file_type().is_symlink() {
+        return true;
+    }
+    #[cfg(windows)]
+    {
+        use std::os::windows::fs::MetadataExt;
+        const FILE_ATTRIBUTE_REPARSE_POINT: u32 = 0x400;
+        metadata.file_attributes() & FILE_ATTRIBUTE_REPARSE_POINT != 0
+    }
+    #[cfg(not(windows))]
+    false
+}
+
+fn project_proxy_directory(project_dir: &Path, create: bool) -> Result<PathBuf, String> {
+    let project_metadata = std::fs::symlink_metadata(project_dir)
+        .map_err(|error| format!("media_proxy_project_metadata_failed:{error}"))?;
+    if !project_metadata.is_dir() || metadata_is_symlink_or_reparse(&project_metadata) {
+        return Err("media_proxy_project_directory_required".to_string());
+    }
+    let project_root = project_dir
+        .canonicalize()
+        .map_err(|error| format!("media_proxy_project_resolve_failed:{error}"))?;
+
+    let media_dir = project_dir.join("media");
+    match std::fs::symlink_metadata(&media_dir) {
+        Ok(metadata) if metadata.is_dir() && !metadata_is_symlink_or_reparse(&metadata) => {}
+        Ok(_) => return Err("media_proxy_media_directory_required".to_string()),
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound && create => {
+            std::fs::create_dir(&media_dir)
+                .map_err(|error| format!("media_proxy_media_create_failed:{error}"))?;
+        }
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {
+            return Err("media_proxy_media_directory_missing".to_string());
+        }
+        Err(error) => return Err(format!("media_proxy_media_metadata_failed:{error}")),
+    }
+    let media_metadata = std::fs::symlink_metadata(&media_dir)
+        .map_err(|error| format!("media_proxy_media_metadata_failed:{error}"))?;
+    if !media_metadata.is_dir() || metadata_is_symlink_or_reparse(&media_metadata) {
+        return Err("media_proxy_media_directory_required".to_string());
+    }
+    let resolved_media = media_dir
+        .canonicalize()
+        .map_err(|error| format!("media_proxy_media_resolve_failed:{error}"))?;
+    if resolved_media.parent() != Some(project_root.as_path()) {
+        return Err("media_proxy_media_directory_escape".to_string());
+    }
+
+    let proxy_dir = media_dir.join("proxies");
+    match std::fs::symlink_metadata(&proxy_dir) {
+        Ok(metadata) if metadata.is_dir() && !metadata_is_symlink_or_reparse(&metadata) => {}
+        Ok(_) => return Err("media_proxy_directory_required".to_string()),
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound && create => {
+            std::fs::create_dir(&proxy_dir)
+                .map_err(|error| format!("media_proxy_directory_create_failed:{error}"))?;
+        }
+        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {
+            return Err("media_proxy_directory_missing".to_string());
+        }
+        Err(error) => return Err(format!("media_proxy_directory_metadata_failed:{error}")),
+    }
+    let proxy_metadata = std::fs::symlink_metadata(&proxy_dir)
+        .map_err(|error| format!("media_proxy_directory_metadata_failed:{error}"))?;
+    if !proxy_metadata.is_dir() || metadata_is_symlink_or_reparse(&proxy_metadata) {
+        return Err("media_proxy_directory_required".to_string());
+    }
+    let resolved_proxy = proxy_dir
+        .canonicalize()
+        .map_err(|error| format!("media_proxy_directory_resolve_failed:{error}"))?;
+    if resolved_proxy.parent() != Some(resolved_media.as_path()) {
+        return Err("media_proxy_directory_escape".to_string());
+    }
+    Ok(proxy_dir)
+}
+
+pub(crate) fn trusted_project_proxy_path(
+    project_dir: &Path,
+    relative_path: &str,
+) -> Option<PathBuf> {
+    let candidate = resolved_project_proxy_path(project_dir, relative_path)?;
+    let proxy_dir = project_proxy_directory(project_dir, false).ok()?;
+    if candidate.parent() != Some(proxy_dir.as_path()) {
+        return None;
+    }
+    let metadata = std::fs::symlink_metadata(&candidate).ok()?;
+    if !metadata.is_file() || metadata_is_symlink_or_reparse(&metadata) {
+        return None;
+    }
+    Some(candidate)
+}
+
+fn grant_proxy_asset_file<R: Runtime>(app: &AppHandle<R>, path: &Path) -> Result<(), String> {
+    let metadata = std::fs::symlink_metadata(path)
+        .map_err(|error| format!("media_proxy_scope_metadata_failed:{error}"))?;
+    if !metadata.file_type().is_file() || metadata.file_type().is_symlink() {
+        return Err("media_proxy_scope_regular_file_required".to_string());
+    }
+    app.asset_protocol_scope()
+        .allow_file(path)
+        .map_err(|error| format!("media_proxy_scope_grant_failed:{error}"))
+}
+
+fn revoke_proxy_asset_file<R: Runtime>(app: &AppHandle<R>, path: &Path) {
+    let scope = app.asset_protocol_scope();
+    // persisted-scope writes on PathAllowed events. Add the exact-file deny
+    // first, then re-emit the exact allow so both patterns are durably saved;
+    // deny precedence keeps the removed path inaccessible after restart.
+    if scope.forbid_file(path).is_ok() {
+        let _ = scope.allow_file(path);
+    }
+}
+
+fn grant_catalog_proxy_asset_scope<R: Runtime>(app: &AppHandle<R>, catalog: &mut MediaListDto) {
+    for item in &mut catalog.items {
+        let Some(path) = item.proxy_path.as_deref().map(Path::new) else {
+            continue;
+        };
+        if grant_proxy_asset_file(app, path).is_err() {
+            item.proxy_path = None;
+        }
+    }
+}
+
+/// Create a bounded project-local H.264 proxy off the UI thread, then persist
+/// its path + source digest in one manifest commit. The original source remains
+/// untouched and is still the only input used by export.
+fn create_media_proxy_blocking(
+    app: AppHandle,
+    asset_id: String,
+    max_width: Option<u32>,
+    max_height: Option<u32>,
+    cancel: opentake_media::MediaCancelToken,
+) -> Result<MediaProxyDto, String> {
+    let core = app.state::<AppCore>();
+    let _identity = core.lock_project_identity_workflow();
+    core.ensure_project_mutable()
+        .map_err(|error| error.to_string())?;
+    let snapshot = core.runtime_snapshot();
+    let project_dir = snapshot
+        .project_dir
+        .clone()
+        .ok_or_else(|| "media_proxy_project_must_be_saved".to_string())?;
+    let entry = snapshot
+        .media
+        .entries
+        .iter()
+        .find(|entry| entry.id == asset_id)
+        .cloned()
+        .ok_or_else(|| format!("media_proxy_source_not_found:{asset_id}"))?;
+    if entry.kind != ClipType::Video {
+        return Err("media_proxy_video_required".to_string());
+    }
+    let source = source_path_for_entry(&entry, Some(&project_dir))?;
+    if !source.is_file() {
+        return Err("media_proxy_source_unreadable".to_string());
+    }
+
+    let project_root = ProjectRoot::open(&project_dir).map_err(|error| error.to_string())?;
+    core.ensure_project_root_identity_for_project(
+        snapshot.project_epoch,
+        &project_dir,
+        project_root.identity(),
+    )
+    .map_err(|error| error.to_string())?;
+    let proxy_dir = project_proxy_directory(&project_dir, true)?;
+    let leaf = format!("{}.mp4", uuid::Uuid::new_v4());
+    let relative_path = format!("media/proxies/{leaf}");
+    let output = proxy_dir.join(leaf);
+    let progress_app = app.clone();
+    let progress_asset_id = asset_id.clone();
+    let progress: ProxyProgressCallback = Arc::new(move |done, total| {
+        let _ = progress_app.emit(
+            "proxy://progress",
+            MediaProxyProgressEvent {
+                asset_id: progress_asset_id.clone(),
+                done,
+                total,
+            },
+        );
+    });
+    let created = match create_proxy(
+        ProxyRequest {
+            source: &source,
+            output: &output,
+            max_size: (max_width.unwrap_or(1280), max_height.unwrap_or(720)),
+        },
+        &cancel,
+        Some(progress),
+    ) {
+        Ok(created) => created,
+        Err(MediaError::Cancelled) => return Err("media_proxy_cancelled".to_string()),
+        Err(error) => return Err(format!("media_proxy_failed:{error}")),
+    };
+    let proxy = MediaProxy {
+        relative_path: relative_path.clone(),
+        source_sha256: created.source_sha256.clone(),
+        width: created.width,
+        height: created.height,
+    };
+    if let Err(error) = core.ensure_project_root_identity_for_project(
+        snapshot.project_epoch,
+        &project_dir,
+        project_root.identity(),
+    ) {
+        let _ = std::fs::remove_file(&output);
+        return Err(error.to_string());
+    }
+    if let Err(error) = core.set_media_proxy_for_project(
+        snapshot.project_epoch,
+        &project_dir,
+        &asset_id,
+        Some(proxy),
+    ) {
+        let _ = std::fs::remove_file(&output);
+        return Err(format!("media_proxy_persist_failed:{error}"));
+    }
+    if let Err(error) = grant_proxy_asset_file(&app, &output) {
+        let rollback = core.set_media_proxy_for_project(
+            snapshot.project_epoch,
+            &project_dir,
+            &asset_id,
+            entry.proxy.clone(),
+        );
+        let _ = std::fs::remove_file(&output);
+        return match rollback {
+            Ok(_) => Err(error),
+            Err(rollback_error) => Err(format!(
+                "{error};media_proxy_scope_rollback_failed:{rollback_error}"
+            )),
+        };
+    }
+    if let Some(old) = entry
+        .proxy
+        .as_ref()
+        .and_then(|proxy| trusted_project_proxy_path(&project_dir, &proxy.relative_path))
+    {
+        if old != output {
+            let _ = std::fs::remove_file(&old);
+            revoke_proxy_asset_file(&app, &old);
+        }
+    }
+    Ok(MediaProxyDto {
+        asset_id,
+        path: output.to_string_lossy().into_owned(),
+        source_sha256: created.source_sha256,
+        width: created.width,
+        height: created.height,
+    })
+}
+
+#[tauri::command]
+pub async fn create_media_proxy(
+    app: AppHandle,
+    asset_id: String,
+    max_width: Option<u32>,
+    max_height: Option<u32>,
+) -> Result<MediaProxyDto, String> {
+    let cancel = app.state::<MediaProxyState>().begin()?;
+    let worker_app = app.clone();
+    let worker_cancel = cancel.clone();
+    let result = match tauri::async_runtime::spawn_blocking(move || {
+        create_media_proxy_blocking(worker_app, asset_id, max_width, max_height, worker_cancel)
+    })
+    .await
+    {
+        Ok(result) => result,
+        Err(error) => Err(format!("media_proxy_task_failed:{error}")),
+    };
+    app.state::<MediaProxyState>().finish(&cancel);
+    result
+}
+
+#[tauri::command]
+pub fn cancel_media_proxy(state: State<'_, MediaProxyState>) -> bool {
+    state.cancel()
+}
+
+#[tauri::command]
+pub fn set_proxy_playback_enabled(state: State<'_, MediaProxyState>, enabled: bool) -> bool {
+    state.set_enabled(enabled);
+    state.enabled()
+}
+
+#[tauri::command]
+pub fn get_proxy_playback_enabled(state: State<'_, MediaProxyState>) -> bool {
+    state.enabled()
+}
+
+fn remove_media_proxy_impl(
+    core: &AppCore,
+    asset_id: &str,
+    cleanup: impl FnOnce(&Path),
+) -> Result<bool, String> {
+    let _identity = core.lock_project_identity_workflow();
+    core.ensure_project_mutable()
+        .map_err(|error| error.to_string())?;
+    let snapshot = core.runtime_snapshot();
+    let project_dir = snapshot
+        .project_dir
+        .clone()
+        .ok_or_else(|| "media_proxy_project_must_be_saved".to_string())?;
+    let old = snapshot
+        .media
+        .entries
+        .iter()
+        .find(|entry| entry.id == asset_id)
+        .ok_or_else(|| format!("media_proxy_source_not_found:{asset_id}"))?
+        .proxy
+        .clone();
+    if old.is_none() {
+        return Ok(false);
+    }
+    let project_root = ProjectRoot::open(&project_dir).map_err(|error| error.to_string())?;
+    core.ensure_project_root_identity_for_project(
+        snapshot.project_epoch,
+        &project_dir,
+        project_root.identity(),
+    )
+    .map_err(|error| error.to_string())?;
+    core.set_media_proxy_for_project(snapshot.project_epoch, &project_dir, asset_id, None)
+        .map_err(|error| error.to_string())?;
+    if let Some(path) = old
+        .as_ref()
+        .and_then(|proxy| trusted_project_proxy_path(&project_dir, &proxy.relative_path))
+    {
+        cleanup(&path);
+    }
+    Ok(true)
+}
+
+#[tauri::command]
+pub fn remove_media_proxy(
+    app: AppHandle,
+    core: State<'_, AppCore>,
+    asset_id: String,
+) -> Result<bool, String> {
+    remove_media_proxy_impl(&core, &asset_id, |path| {
+        let _ = std::fs::remove_file(path);
+        revoke_proxy_asset_file(&app, path);
+    })
+}
+
+fn find_runtime_clip<'a>(timeline: &'a Timeline, clip_id: &str) -> Option<&'a Clip> {
+    timeline
+        .tracks
+        .iter()
+        .flat_map(|track| &track.clips)
+        .find(|clip| clip.id == clip_id)
+        .or_else(|| {
+            timeline
+                .nested_sequences
+                .iter()
+                .flat_map(|sequence| &sequence.timeline.tracks)
+                .flat_map(|track| &track.clips)
+                .find(|clip| clip.id == clip_id)
+        })
+}
+
 /// `preload_media`: enqueue the smallest cache that makes the selected media
 /// immediately useful — a hi-res first-frame poster for video or a waveform for
 /// audio. The bounded project scheduler keeps this fire-and-forget work off the
@@ -2632,6 +3968,8 @@ mod tests {
             source_height: Some(240),
             source_fps: Some(30.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -3464,6 +4802,7 @@ mod tests {
                 height: Some(1080),
                 fps: Some(30.0),
                 has_audio: true,
+                color: None,
             }
         );
     }
@@ -3516,6 +4855,8 @@ mod tests {
             source_height: Some(240),
             source_fps: Some(30.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -3592,6 +4933,7 @@ mod tests {
                 height: None,
                 fps: None,
                 has_audio: true,
+                color: None,
             }
         );
     }
@@ -4071,6 +5413,8 @@ mod tests {
             source_height: Some(480),
             source_fps: Some(24.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -4090,6 +5434,40 @@ mod tests {
         assert_eq!(dto.generation_input, None);
     }
 
+    #[test]
+    fn dto_projects_project_relative_entry_with_resolved_path() {
+        let bundle = tempfile::tempdir().unwrap();
+        let relative_path = PathBuf::from("media/stems/job/vocals.wav");
+        let source = bundle.path().join(&relative_path);
+        fs::create_dir_all(source.parent().unwrap()).unwrap();
+        fs::write(&source, b"derived-audio").unwrap();
+        let entry = MediaManifestEntry {
+            id: "stem-vocals".into(),
+            name: "Mix Vocals".into(),
+            kind: ClipType::Audio,
+            source: MediaSource::Project {
+                relative_path: relative_path.to_string_lossy().into_owned(),
+            },
+            duration: 5.0,
+            generation_input: None,
+            source_width: None,
+            source_height: None,
+            source_fps: None,
+            has_audio: Some(true),
+            color: None,
+            proxy: None,
+            folder_id: None,
+            cached_remote_url: None,
+            cached_remote_url_expires_at: None,
+        };
+
+        let dto = MediaItemDto::from_entry(&entry, Some(bundle.path()), None, false);
+
+        assert_eq!(dto.path.as_deref(), Some(source.to_string_lossy().as_ref()));
+        assert!(!dto.missing);
+        assert_eq!(dto.file_size, Some(13));
+    }
+
     #[test]
     fn dto_reports_file_size_for_present_source() {
         let tmp = tempfile::tempdir().unwrap();
@@ -4108,6 +5486,8 @@ mod tests {
             source_height: Some(480),
             source_fps: Some(24.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -4126,8 +5506,14 @@ mod tests {
             duration: 0.0,
             width: Some(10),
             height: Some(20),
+            source_fps: Some(24.0),
             has_audio: false,
+            color: None,
+            is_hdr: false,
             path: Some("/p.png".into()),
+            proxy_path: None,
+            proxy_width: None,
+            proxy_height: None,
             thumbnail: None,
             folder_id: None,
             file_size: Some(2048),
@@ -4144,6 +5530,7 @@ mod tests {
         assert!(json.contains("\"thumbnail\":null"));
         assert!(json.contains("\"folderId\":null"));
         assert!(json.contains("\"fileSize\":2048"));
+        assert!(json.contains("\"sourceFps\":24.0"));
         assert!(json.contains("\"generationInput\":null"));
         assert!(json.contains("\"missing\":false"));
         assert!(json.contains("\"favorite\":true"));
@@ -4172,6 +5559,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(true),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -4534,6 +5923,8 @@ mod tests {
                 source_height: Some(480),
                 source_fps: Some(30.0),
                 has_audio: Some(true),
+                color: None,
+                proxy: None,
                 folder_id: None,
                 cached_remote_url: None,
                 cached_remote_url_expires_at: None,
@@ -4616,6 +6007,112 @@ mod tests {
         assert_eq!(dto.skipped, vec!["note.txt", "archive.zip"]);
     }
 
+    #[test]
+    fn proxy_asset_scope_grants_only_regular_file_and_revoke_denies_it() {
+        let app = tauri::test::mock_app();
+        let handle = app.handle();
+        let temp = tempfile::tempdir().unwrap();
+        let proxy = temp.path().join("proxy.mp4");
+        fs::write(&proxy, b"proxy").unwrap();
+
+        assert!(!handle.asset_protocol_scope().is_allowed(&proxy));
+        grant_proxy_asset_file(handle, &proxy).expect("grant exact proxy file");
+        assert!(handle.asset_protocol_scope().is_allowed(&proxy));
+        revoke_proxy_asset_file(handle, &proxy);
+        assert!(!handle.asset_protocol_scope().is_allowed(&proxy));
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn proxy_asset_scope_rejects_symlink() {
+        use std::os::unix::fs::symlink;
+
+        let app = tauri::test::mock_app();
+        let temp = tempfile::tempdir().unwrap();
+        let target = temp.path().join("outside.mp4");
+        let proxy = temp.path().join("proxy.mp4");
+        fs::write(&target, b"outside").unwrap();
+        symlink(&target, &proxy).unwrap();
+
+        assert_eq!(
+            grant_proxy_asset_file(app.handle(), &proxy).unwrap_err(),
+            "media_proxy_scope_regular_file_required"
+        );
+        assert!(!app.handle().asset_protocol_scope().is_allowed(&target));
+    }
+
+    #[cfg(unix)]
+    #[test]
+    fn project_proxy_path_rejects_symlinked_ancestor_directory() {
+        use std::os::unix::fs::symlink;
+
+        let temp = tempfile::tempdir().unwrap();
+        let bundle = temp.path().join("ProxyPath.opentake");
+        let outside = temp.path().join("outside");
+        fs::create_dir_all(bundle.join("media")).unwrap();
+        fs::create_dir_all(&outside).unwrap();
+        fs::write(outside.join("proxy.mp4"), b"outside").unwrap();
+        symlink(&outside, bundle.join("media/proxies")).unwrap();
+
+        assert!(trusted_project_proxy_path(&bundle, "media/proxies/proxy.mp4").is_none());
+    }
+
+    #[test]
+    fn remove_proxy_holds_project_identity_through_file_cleanup() {
+        use std::sync::mpsc;
+        use std::time::Duration;
+
+        let temp = tempfile::tempdir().unwrap();
+        let project_a_root = temp.path().join("project-a");
+        let project_b_root = temp.path().join("project-b");
+        fs::create_dir_all(&project_a_root).unwrap();
+        fs::create_dir_all(&project_b_root).unwrap();
+        let (core, _bundle_a, _source_a, asset_id) = saved_core_with_media(&project_a_root);
+        let (_other, bundle_b, _source_b, _asset_b) = saved_core_with_media(&project_b_root);
+        let core = Arc::new(core);
+        let snapshot = core.runtime_snapshot();
+        let project_dir = snapshot.project_dir.clone().unwrap();
+        let proxy_path = project_dir.join("media/proxies/proxy.mp4");
+        fs::create_dir_all(proxy_path.parent().unwrap()).unwrap();
+        fs::write(&proxy_path, b"proxy").unwrap();
+        core.set_media_proxy_for_project(
+            snapshot.project_epoch,
+            &project_dir,
+            &asset_id,
+            Some(MediaProxy {
+                relative_path: "media/proxies/proxy.mp4".into(),
+                source_sha256: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+                    .into(),
+                width: 1280,
+                height: 720,
+            }),
+        )
+        .unwrap();
+
+        let (start_tx, start_rx) = mpsc::channel();
+        let (done_tx, done_rx) = mpsc::channel();
+        let replacement_core = Arc::clone(&core);
+        let replacement = std::thread::spawn(move || {
+            start_rx.recv().unwrap();
+            replacement_core.open_project(bundle_b).unwrap();
+            done_tx.send(()).unwrap();
+        });
+
+        remove_media_proxy_impl(&core, &asset_id, |path| {
+            fs::remove_file(path).unwrap();
+            start_tx.send(()).unwrap();
+            assert!(
+                done_rx.recv_timeout(Duration::from_millis(100)).is_err(),
+                "project replacement must stay blocked until proxy cleanup returns"
+            );
+        })
+        .unwrap();
+
+        done_rx.recv_timeout(Duration::from_secs(2)).unwrap();
+        replacement.join().unwrap();
+        assert!(!proxy_path.exists());
+    }
+
     #[test]
     fn get_media_reflects_imported_items() {
         let tmp = tempfile::tempdir().unwrap();
@@ -4755,4 +6252,57 @@ mod tests {
             "extensionless path must be rejected: got {err}"
         );
     }
+
+    #[test]
+    fn stabilization_analysis_state_cancels_and_releases_single_flight_slot() {
+        let state = StabilizationAnalysisState::default();
+        let first = state.begin().expect("first analysis reserves the slot");
+        assert!(state.begin().is_err(), "a concurrent analysis is rejected");
+
+        assert!(state.cancel(), "the active analysis is cancellable");
+        assert!(first.is_cancelled());
+        state.finish(&first);
+        assert!(!state.cancel(), "finishing clears the active token");
+
+        let second = state.begin().expect("the slot can be reused after finish");
+        assert!(!second.is_cancelled());
+        state.finish(&second);
+    }
+
+    #[test]
+    fn denoise_analysis_state_cancels_and_releases_single_flight_slot() {
+        let state = DenoiseAnalysisState::default();
+        let first = state.begin().expect("first analysis reserves the slot");
+        let concurrent = match state.begin() {
+            Ok(_) => panic!("a concurrent analysis must be rejected"),
+            Err(error) => error,
+        };
+        assert_eq!(concurrent, "denoise_analysis_busy");
+
+        assert!(state.cancel(), "the active analysis is cancellable");
+        assert!(first.is_cancelled());
+        state.finish(&first);
+        assert!(!state.cancel(), "finishing clears the active token");
+
+        let second = state.begin().expect("the slot can be reused after finish");
+        assert!(!second.is_cancelled());
+        state.finish(&second);
+    }
+
+    #[test]
+    fn stem_separation_state_cancels_and_releases_single_flight_slot() {
+        let state = StemSeparationState::default();
+        let first = state.begin().expect("first separation reserves the slot");
+        let concurrent = match state.begin() {
+            Ok(_) => panic!("a concurrent separation must be rejected"),
+            Err(error) => error,
+        };
+        assert_eq!(concurrent, "stem_separation_busy");
+        assert!(state.cancel());
+        assert!(first.is_cancelled());
+        state.finish(&first);
+        assert!(!state.cancel());
+        let second = state.begin().expect("slot is reusable");
+        state.finish(&second);
+    }
 }
diff --git a/src-tauri/src/motion.rs b/src-tauri/src/motion.rs
new file mode 100644
index 00000000..dc627fc9
--- /dev/null
+++ b/src-tauri/src/motion.rs
@@ -0,0 +1,938 @@
+//! Deterministic desktop motion-graphic renderer and atomic project commit.
+//!
+//! The first production path materializes a constrained HTML/template scene
+//! through the `opentake-motion` headless-Chromium renderer, encodes its exact
+//! PNG frame sequence with the bundled FFmpeg, then asks `AppCore` to register
+//! and place/replace the video in one durable undo transaction.
+
+use std::io::Write;
+use std::process::{Command, Stdio};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
+use std::time::Duration;
+
+use opentake_agent::mcp::motion::{
+    AddMotionRequest, EditMotionRequest, MotionBridge, MotionBridgeError, MotionBridgeErrorKind,
+    MotionCommit, MotionOutputMetadata, MotionSourceRequest,
+};
+use opentake_core::{AppCore, MotionPlacement, ProbedMedia};
+use opentake_domain::{GenerationInput, GenerationJobStatus};
+use opentake_motion::{
+    HeadlessChromiumRenderer, MotionCache, MotionCancellationToken, MotionError,
+    MotionRenderRequest, MotionRenderer, MotionSource, RenderedClip, SandboxPolicy,
+};
+use serde::{Deserialize, Serialize};
+use serde_json::{Map, Value};
+use std::sync::Mutex;
+use tauri::{AppHandle, Emitter, State};
+
+const MOTION_PROVIDER: &str = "opentake-motion";
+const MOTION_MODEL: &str = "opentake.motion-v1";
+const LEGACY_MOTION_MODEL: &str = "opentake.motion-html-v1";
+
+#[derive(Clone)]
+pub struct TauriMotionBridge {
+    core: AppCore,
+    cache_root: std::path::PathBuf,
+    progress: Arc<dyn Fn(MotionProgress) + Send + Sync>,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub enum MotionProgress {
+    Validating,
+    Rendering,
+    Encoding,
+    Committing,
+    Complete,
+}
+
+#[derive(Clone)]
+pub struct MotionCommandState {
+    bridge: Arc<TauriMotionBridge>,
+    active: Arc<Mutex<Option<opentake_media::MediaCancelToken>>>,
+}
+
+impl MotionCommandState {
+    pub fn new(bridge: Arc<TauriMotionBridge>) -> Self {
+        Self {
+            bridge,
+            active: Arc::new(Mutex::new(None)),
+        }
+    }
+
+    fn begin(&self) -> Result<opentake_media::MediaCancelToken, String> {
+        let mut active = self
+            .active
+            .lock()
+            .map_err(|_| "motion command state is unavailable".to_string())?;
+        if active.is_some() {
+            return Err("another motion render is already running".into());
+        }
+        let cancel = opentake_media::MediaCancelToken::new();
+        *active = Some(cancel.clone());
+        Ok(cancel)
+    }
+
+    fn finish(&self) {
+        if let Ok(mut active) = self.active.lock() {
+            *active = None;
+        }
+    }
+
+    fn cancel(&self) -> bool {
+        self.active
+            .lock()
+            .ok()
+            .and_then(|active| active.clone())
+            .map(|cancel| {
+                cancel.cancel();
+                true
+            })
+            .unwrap_or(false)
+    }
+
+    pub fn cancel_active(&self) {
+        let _ = self.cancel();
+    }
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MotionAddCommand {
+    #[serde(default)]
+    pub code: Option<String>,
+    #[serde(default)]
+    pub template_id: Option<String>,
+    #[serde(default)]
+    pub params: Map<String, Value>,
+    pub start_frame: i32,
+    pub duration_frames: i32,
+    #[serde(default)]
+    pub transparent: bool,
+    #[serde(default)]
+    pub track_index: Option<usize>,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct MotionEditCommand {
+    pub clip_id: String,
+    #[serde(default)]
+    pub code: Option<String>,
+    #[serde(default)]
+    pub params: Option<Map<String, Value>>,
+}
+
+#[tauri::command]
+pub fn motion_capability(state: State<'_, MotionCommandState>) -> bool {
+    state.bridge.can_render_motion()
+}
+
+#[tauri::command]
+pub async fn motion_add(
+    app: AppHandle,
+    state: State<'_, MotionCommandState>,
+    request: MotionAddCommand,
+) -> Result<MotionCommit, String> {
+    let source = match (request.code, request.template_id) {
+        (Some(code), None) => MotionSourceRequest::Code(code),
+        (None, Some(template_id)) => MotionSourceRequest::Template {
+            template_id,
+            params: request.params,
+        },
+        _ => return Err("provide exactly one of code or templateId".into()),
+    };
+    let cancel = state.begin()?;
+    let bridge = state
+        .bridge
+        .as_ref()
+        .clone()
+        .with_progress_callback(Arc::new(move |phase| {
+            let _ = app.emit("motion_progress", phase);
+        }));
+    let worker = tauri::async_runtime::spawn_blocking(move || {
+        bridge.add(
+            AddMotionRequest {
+                source,
+                start_frame: request.start_frame,
+                duration_frames: request.duration_frames,
+                transparent: request.transparent,
+                track_index: request.track_index,
+            },
+            &cancel,
+        )
+    })
+    .await;
+    state.finish();
+    let result = worker.map_err(|_| "motion render worker failed".to_string())?;
+    result.map_err(|error| error.message)
+}
+
+#[tauri::command]
+pub async fn motion_edit(
+    app: AppHandle,
+    state: State<'_, MotionCommandState>,
+    request: MotionEditCommand,
+) -> Result<MotionCommit, String> {
+    let cancel = state.begin()?;
+    let bridge = state
+        .bridge
+        .as_ref()
+        .clone()
+        .with_progress_callback(Arc::new(move |phase| {
+            let _ = app.emit("motion_progress", phase);
+        }));
+    let worker = tauri::async_runtime::spawn_blocking(move || {
+        bridge.edit(
+            EditMotionRequest {
+                clip_id: request.clip_id,
+                code: request.code,
+                params: request.params,
+            },
+            &cancel,
+        )
+    })
+    .await;
+    state.finish();
+    let result = worker.map_err(|_| "motion render worker failed".to_string())?;
+    result.map_err(|error| error.message)
+}
+
+#[tauri::command]
+pub fn motion_cancel(state: State<'_, MotionCommandState>) -> bool {
+    state.cancel()
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(tag = "kind", rename_all = "camelCase")]
+enum StoredMotionSource {
+    Code {
+        code: String,
+    },
+    Template {
+        template_id: String,
+        #[serde(default)]
+        params: Map<String, Value>,
+    },
+}
+
+impl TauriMotionBridge {
+    pub fn new(core: AppCore, cache_root: impl Into<std::path::PathBuf>) -> Self {
+        Self {
+            core,
+            cache_root: cache_root.into(),
+            progress: Arc::new(|_| {}),
+        }
+    }
+
+    pub fn with_progress_callback(
+        mut self,
+        progress: Arc<dyn Fn(MotionProgress) + Send + Sync>,
+    ) -> Self {
+        self.progress = progress;
+        self
+    }
+
+    fn render_and_encode(
+        &self,
+        stored_source: &StoredMotionSource,
+        duration_frames: i32,
+        transparent: bool,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<(tempfile::TempDir, std::path::PathBuf, ProbedMedia, String), MotionBridgeError>
+    {
+        (self.progress)(MotionProgress::Validating);
+        if transparent {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::CapabilityUnavailable,
+                "The current MP4 motion path is opaque; transparent motion output is not supported yet.",
+            ));
+        }
+        if cancel.is_cancelled() {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::Cancelled,
+                "motion render cancelled",
+            ));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        snapshot.project_dir.as_ref().ok_or_else(|| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "Save the project before rendering a motion graphic.",
+            )
+        })?;
+        if duration_frames < 1 {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "durationFrames must be at least 1",
+            ));
+        }
+        let fps = u32::try_from(snapshot.timeline.fps.max(1)).unwrap_or(30);
+        let width = u32::try_from(snapshot.timeline.width.max(2)).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "timeline width is invalid",
+            )
+        })?;
+        let height = u32::try_from(snapshot.timeline.height.max(2)).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "timeline height is invalid",
+            )
+        })?;
+        let frames = u32::try_from(duration_frames).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "durationFrames is invalid",
+            )
+        })?;
+        let html = source_document(stored_source, fps, width, height, frames)?;
+        let request =
+            MotionRenderRequest::new(MotionSource::code(html), fps, frames, width, height)
+                .with_transparent(false);
+        request.validate().map_err(map_motion_error)?;
+
+        let render_cancel = MotionCancellationToken::new();
+        let monitor_cancel = render_cancel.clone();
+        let media_cancel = cancel.clone();
+        let done = Arc::new(AtomicBool::new(false));
+        let monitor_done = Arc::clone(&done);
+        let monitor = std::thread::spawn(move || {
+            while !monitor_done.load(Ordering::Acquire) {
+                if media_cancel.is_cancelled() {
+                    monitor_cancel.cancel();
+                    break;
+                }
+                std::thread::sleep(Duration::from_millis(10));
+            }
+        });
+        let renderer = HeadlessChromiumRenderer::new(
+            MotionCache::new(self.cache_root.join("motion-frames")),
+            SandboxPolicy::offline_with_timeout(Duration::from_secs(90)),
+        )
+        .with_cancellation_token(render_cancel);
+        (self.progress)(MotionProgress::Rendering);
+        let rendered = renderer.render(&request).map_err(map_motion_error);
+        done.store(true, Ordering::Release);
+        let _ = monitor.join();
+        let rendered = rendered?;
+
+        let output_dir = tempfile::Builder::new()
+            .prefix("opentake-motion-")
+            .tempdir()
+            .map_err(io_motion_error)?;
+        let output = output_dir.path().join("output.mp4");
+        (self.progress)(MotionProgress::Encoding);
+        if let Err(error) = encode_frames(&rendered, &output, cancel) {
+            let _ = std::fs::remove_file(&output);
+            return Err(error);
+        }
+        let probe = opentake_media::probe(&output).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "rendered motion video failed validation",
+            )
+        })?;
+        if !probe.has_video
+            || probe.width != Some(width)
+            || probe.height != Some(height)
+            || (probe.duration_secs - f64::from(frames) / f64::from(fps)).abs()
+                > (1.5 / f64::from(fps))
+        {
+            let _ = std::fs::remove_file(&output);
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "rendered motion video metadata did not match the request",
+            ));
+        }
+        Ok((
+            output_dir,
+            output,
+            ProbedMedia {
+                duration_secs: probe.duration_secs,
+                width: probe.width.and_then(|value| i32::try_from(value).ok()),
+                height: probe.height.and_then(|value| i32::try_from(value).ok()),
+                fps: probe.fps,
+                has_audio: probe.has_audio,
+                color: probe.color,
+            },
+            rendered.content_hash,
+        ))
+    }
+
+    fn commit(
+        &self,
+        stored_source: StoredMotionSource,
+        duration_frames: i32,
+        transparent: bool,
+        placement: MotionPlacement,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError> {
+        let snapshot = self.core.runtime_snapshot();
+        let project_dir = snapshot.project_dir.clone().ok_or_else(|| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "Save the project before rendering a motion graphic.",
+            )
+        })?;
+        let (_temporary_output, output, probe, content_hash) =
+            self.render_and_encode(&stored_source, duration_frames, transparent, cancel)?;
+        let motion_canvas = matches!(
+            &stored_source,
+            StoredMotionSource::Template { template_id, .. } if template_id == "title-card"
+        );
+        let output_metadata = MotionOutputMetadata {
+            renderer: if motion_canvas {
+                "motion-canvas".into()
+            } else {
+                "opentake-html-fallback".into()
+            },
+            renderer_version: if motion_canvas {
+                "3.17.2".into()
+            } else {
+                env!("CARGO_PKG_VERSION").into()
+            },
+            output_file: "output.mp4".into(),
+            fps: probe
+                .fps
+                .unwrap_or_else(|| f64::from(snapshot.timeline.fps.max(1))),
+            width: u32::try_from(probe.width.unwrap_or(snapshot.timeline.width)).unwrap_or(0),
+            height: u32::try_from(probe.height.unwrap_or(snapshot.timeline.height)).unwrap_or(0),
+            duration_frames,
+            duration_seconds: probe.duration_secs,
+            content_hash: content_hash.clone(),
+        };
+        let result_path = output
+            .parent()
+            .ok_or_else(|| {
+                MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    "motion result directory is missing",
+                )
+            })?
+            .join("motion-result.json");
+        let result_bytes = serde_json::to_vec_pretty(&output_metadata).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "motion result metadata could not be encoded",
+            )
+        })?;
+        std::fs::write(&result_path, result_bytes).map_err(io_motion_error)?;
+        validate_motion_result(
+            &std::fs::read(&result_path).map_err(io_motion_error)?,
+            &output_metadata,
+        )?;
+        let project_media = crate::library::ProjectMediaCapability::open_verified(
+            &self.core,
+            snapshot.project_epoch,
+            &project_dir,
+            true,
+        )
+        .map_err(|error| MotionBridgeError::new(MotionBridgeErrorKind::RenderFailed, error))?;
+        let leaf_name = format!("motion-{}.mp4", uuid::Uuid::new_v4());
+        let mut published = project_media
+            .create_import(std::path::Path::new(&leaf_name))
+            .map_err(|error| MotionBridgeError::new(MotionBridgeErrorKind::RenderFailed, error))?;
+        let mut encoded = std::fs::File::open(&output).map_err(io_motion_error)?;
+        std::io::copy(&mut encoded, published.file_mut()).map_err(io_motion_error)?;
+        published.file_mut().flush().map_err(io_motion_error)?;
+        published.file().sync_all().map_err(io_motion_error)?;
+        if !project_media
+            .matches_leaf(&published)
+            .map_err(|error| MotionBridgeError::new(MotionBridgeErrorKind::RenderFailed, error))?
+        {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "motion output identity changed before project commit",
+            ));
+        }
+        let source_json = serde_json::to_string(&stored_source).map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "motion source could not be persisted",
+            )
+        })?;
+        let provenance = GenerationInput {
+            prompt: source_json,
+            model: MOTION_MODEL.into(),
+            duration: duration_frames,
+            aspect_ratio: format!("{}:{}", snapshot.timeline.width, snapshot.timeline.height),
+            provider: Some(MOTION_PROVIDER.into()),
+            status: Some(GenerationJobStatus::Ready),
+            ..GenerationInput::default()
+        };
+        (self.progress)(MotionProgress::Committing);
+        let committed = self.core.commit_motion_media_for_project(
+            snapshot.project_epoch,
+            snapshot.version,
+            &project_dir,
+            published.path(),
+            "Motion Graphic",
+            &probe,
+            provenance,
+            placement,
+        );
+        let committed = match committed {
+            Ok(committed) => committed,
+            Err(error) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    format!("motion project commit failed: {error}"),
+                ));
+            }
+        };
+        published.commit();
+        let clip_id = committed
+            .edit
+            .affected_clip_ids
+            .first()
+            .cloned()
+            .ok_or_else(|| {
+                MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    "motion commit returned no clip id",
+                )
+            })?;
+        (self.progress)(MotionProgress::Complete);
+        Ok(MotionCommit {
+            clip_id,
+            asset_id: committed.media.id,
+            content_hash,
+            action_name: committed.edit.action_name,
+            output: output_metadata,
+        })
+    }
+}
+
+impl MotionBridge for TauriMotionBridge {
+    fn can_render_motion(&self) -> bool {
+        HeadlessChromiumRenderer::find_browser().is_some()
+            && opentake_media::ffmpeg_status::ffmpeg_available()
+            && opentake_media::ffmpeg_status::ffprobe_available()
+    }
+
+    fn add(
+        &self,
+        request: AddMotionRequest,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError> {
+        if request.start_frame < 0 {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "startFrame must be non-negative",
+            ));
+        }
+        let snapshot = self.core.runtime_snapshot();
+        if let Some(track_index) = request.track_index {
+            let Some(track) = snapshot.timeline.tracks.get(track_index) else {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "trackIndex is out of range",
+                ));
+            };
+            if track.kind == opentake_domain::ClipType::Audio {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "motion graphics require a visual track",
+                ));
+            }
+        }
+        let stored_source = match request.source {
+            MotionSourceRequest::Code(code) => StoredMotionSource::Code { code },
+            MotionSourceRequest::Template {
+                template_id,
+                params,
+            } => StoredMotionSource::Template {
+                template_id,
+                params,
+            },
+        };
+        self.commit(
+            stored_source,
+            request.duration_frames,
+            request.transparent,
+            MotionPlacement::Add {
+                start_frame: request.start_frame,
+                duration_frames: request.duration_frames,
+                track_index: request.track_index,
+            },
+            cancel,
+        )
+    }
+
+    fn edit(
+        &self,
+        request: EditMotionRequest,
+        cancel: &opentake_media::MediaCancelToken,
+    ) -> Result<MotionCommit, MotionBridgeError> {
+        let snapshot = self.core.runtime_snapshot();
+        let clip = snapshot
+            .timeline
+            .tracks
+            .iter()
+            .flat_map(|track| &track.clips)
+            .find(|clip| clip.id == request.clip_id)
+            .ok_or_else(|| {
+                MotionBridgeError::new(
+                    MotionBridgeErrorKind::ResourceNotFound,
+                    "motion clip was not found",
+                )
+            })?;
+        let entry = snapshot
+            .media
+            .entries
+            .iter()
+            .find(|entry| entry.id == clip.media_ref)
+            .ok_or_else(|| {
+                MotionBridgeError::new(
+                    MotionBridgeErrorKind::ResourceNotFound,
+                    "motion media was not found",
+                )
+            })?;
+        let provenance = entry.generation_input.as_ref().filter(|input| {
+            input.provider.as_deref() == Some(MOTION_PROVIDER)
+                && matches!(input.model.as_str(), MOTION_MODEL | LEGACY_MOTION_MODEL)
+        });
+        let provenance = provenance.ok_or_else(|| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "the selected clip is not an OpenTake motion graphic",
+            )
+        })?;
+        let mut source: StoredMotionSource =
+            serde_json::from_str(&provenance.prompt).map_err(|_| {
+                MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    "stored motion source is invalid",
+                )
+            })?;
+        match (&mut source, request.code, request.params) {
+            (StoredMotionSource::Code { code }, Some(updated), None) => *code = updated,
+            (StoredMotionSource::Template { params, .. }, None, Some(updated)) => {
+                params.extend(updated)
+            }
+            (StoredMotionSource::Code { .. }, None, Some(_)) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "params can only edit a template-authored motion graphic",
+                ));
+            }
+            (StoredMotionSource::Template { .. }, Some(_), _) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "code cannot replace a template-authored motion graphic",
+                ));
+            }
+            (_, None, None) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "edit requires code or params",
+                ));
+            }
+            (StoredMotionSource::Code { .. }, Some(_), Some(_)) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "code-authored motion edits do not accept template params",
+                ));
+            }
+        }
+        self.commit(
+            source,
+            clip.duration_frames,
+            false,
+            MotionPlacement::Replace {
+                clip_id: request.clip_id,
+            },
+            cancel,
+        )
+    }
+}
+
+fn source_document(
+    source: &StoredMotionSource,
+    fps: u32,
+    width: u32,
+    height: u32,
+    frames: u32,
+) -> Result<String, MotionBridgeError> {
+    match source {
+        StoredMotionSource::Code { code } => {
+            let trimmed = code.trim();
+            if trimmed.is_empty() {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::InvalidArguments,
+                    "motion code must not be empty",
+                ));
+            }
+            if !trimmed.contains('<') {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::CapabilityUnavailable,
+                    "This Beta accepts self-contained HTML/CSS/JS motion code; TS/TSX compilation is not available in the packaged renderer.",
+                ));
+            }
+            Ok(trimmed.to_owned())
+        }
+        StoredMotionSource::Template {
+            template_id,
+            params,
+        } => template_document(template_id, params, fps, width, height, frames),
+    }
+}
+
+fn template_document(
+    template_id: &str,
+    params: &Map<String, Value>,
+    fps: u32,
+    width: u32,
+    height: u32,
+    frames: u32,
+) -> Result<String, MotionBridgeError> {
+    if !matches!(template_id, "title-card" | "lower-third.glass") {
+        return Err(MotionBridgeError::new(
+            MotionBridgeErrorKind::InvalidArguments,
+            format!("unknown motion template: {template_id}"),
+        ));
+    }
+    let string_param = |name: &str, default: &str| -> Result<String, MotionBridgeError> {
+        match params.get(name) {
+            None => Ok(default.to_owned()),
+            Some(Value::String(value)) => Ok(value.clone()),
+            Some(_) => Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                format!("template parameter {name} must be a string"),
+            )),
+        }
+    };
+    for key in params.keys() {
+        if !matches!(key.as_str(), "title" | "subtitle" | "accent" | "background") {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                format!("unknown template parameter: {key}"),
+            ));
+        }
+    }
+    let title = js_string(&string_param("title", "OpenTake")?);
+    let subtitle = js_string(&string_param("subtitle", "Motion Graphic")?);
+    let accent = js_string(&string_param("accent", "#7C5CFF")?);
+    let background = js_string(&string_param("background", "#11131A")?);
+    if template_id == "title-card" {
+        let config = serde_json::json!({
+            "templateId": "title-card",
+            "params": {
+                "title": string_param("title", "OpenTake")?,
+                "subtitle": string_param("subtitle", "Motion Canvas")?,
+                "accent": string_param("accent", "#7C5CFF")?,
+                "background": string_param("background", "#11131A")?,
+            },
+            "durationSeconds": f64::from(frames) / f64::from(fps),
+            "durationFrames": frames,
+            "fps": fps,
+            "width": width,
+            "height": height,
+        });
+        let config = safe_inline_json(&config)?;
+        let runner = include_str!("../../plugins/motion-canvas-studio/bundle/runner.html");
+        if runner.matches("__OPENTAKE_MOTION_CONFIG_JSON__").count() != 1 {
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "embedded Motion Canvas runner has an invalid configuration boundary",
+            ));
+        }
+        return Ok(runner.replacen("__OPENTAKE_MOTION_CONFIG_JSON__", &config, 1));
+    }
+    let lower_third = template_id == "lower-third.glass";
+    Ok(format!(
+        r#"<!doctype html><html><head><style>
+html,body{{margin:0;width:100%;height:100%;overflow:hidden;background:transparent;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}}
+#stage{{position:absolute;inset:0;background:var(--bg);display:flex;align-items:{align};justify-content:center}}
+#card{{position:relative;min-width:42%;max-width:78%;padding:3.5% 4.5%;border-radius:28px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);box-shadow:0 20px 80px rgba(0,0,0,.35);color:white;transform-origin:center}}
+#bar{{height:8px;width:28%;background:var(--accent);border-radius:999px;margin-bottom:24px}}
+#title{{font-size:clamp(38px,6vw,96px);font-weight:760;letter-spacing:-.035em;line-height:1.02}}
+#subtitle{{font-size:clamp(20px,2.4vw,42px);opacity:.76;margin-top:18px;line-height:1.2}}
+</style></head><body><div id="stage"><div id="card"><div id="bar"></div><div id="title"></div><div id="subtitle"></div></div></div>
+<script>const title={title},subtitle={subtitle},accent={accent},background={background};
+document.documentElement.style.setProperty('--accent',accent);document.documentElement.style.setProperty('--bg',background);
+document.getElementById('title').textContent=title;document.getElementById('subtitle').textContent=subtitle;
+OpenTake.onSeek((t)=>{{const p=Math.max(0,Math.min(1,t*2.4));const eased=1-Math.pow(1-p,3);card.style.opacity=String(p);card.style.transform=`translateY(${{(1-eased)*64}}px) scale(${{.96+.04*eased}})`;bar.style.width=`${{28+Math.sin(t*2.2)*3}}%`;}});</script></body></html>"#,
+        align = if lower_third { "flex-end" } else { "center" },
+    ))
+}
+
+fn safe_inline_json(value: &Value) -> Result<String, MotionBridgeError> {
+    serde_json::to_string(value)
+        .map(|json| {
+            json.replace('<', "\\u003c")
+                .replace('>', "\\u003e")
+                .replace('&', "\\u0026")
+                .replace('\u{2028}', "\\u2028")
+                .replace('\u{2029}', "\\u2029")
+        })
+        .map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::InvalidArguments,
+                "motion template parameters could not be encoded",
+            )
+        })
+}
+
+fn validate_motion_result(
+    bytes: &[u8],
+    expected: &MotionOutputMetadata,
+) -> Result<(), MotionBridgeError> {
+    let result: MotionOutputMetadata = serde_json::from_slice(bytes).map_err(|_| {
+        MotionBridgeError::new(
+            MotionBridgeErrorKind::RenderFailed,
+            "motion-result.json is malformed",
+        )
+    })?;
+    if result != *expected {
+        return Err(MotionBridgeError::new(
+            MotionBridgeErrorKind::RenderFailed,
+            "motion-result.json did not match the validated output",
+        ));
+    }
+    Ok(())
+}
+
+fn js_string(value: &str) -> String {
+    serde_json::to_string(value)
+        .unwrap_or_else(|_| "\"\"".into())
+        .replace('<', "\\u003c")
+        .replace('>', "\\u003e")
+        .replace('&', "\\u0026")
+}
+
+fn encode_frames(
+    rendered: &RenderedClip,
+    output: &std::path::Path,
+    cancel: &opentake_media::MediaCancelToken,
+) -> Result<(), MotionBridgeError> {
+    let pattern = rendered
+        .frames
+        .first()
+        .and_then(|path| path.parent())
+        .ok_or_else(|| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::RenderFailed,
+                "motion renderer returned no frames",
+            )
+        })?
+        .join("frame_%05d.png");
+    let mut child = Command::new(opentake_media::ffmpeg_status::ffmpeg_path())
+        .args(["-v", "error", "-nostdin", "-framerate"])
+        .arg(rendered.fps.to_string())
+        .arg("-i")
+        .arg(pattern)
+        .args(["-frames:v", &rendered.frames.len().to_string()])
+        .args([
+            "-an",
+            "-c:v",
+            "libx264",
+            "-pix_fmt",
+            "yuv420p",
+            "-movflags",
+            "+faststart",
+            "-y",
+        ])
+        .arg(output)
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()
+        .map_err(|_| {
+            MotionBridgeError::new(
+                MotionBridgeErrorKind::CapabilityUnavailable,
+                "FFmpeg could not be started for motion encoding",
+            )
+        })?;
+    loop {
+        if cancel.is_cancelled() {
+            let _ = child.kill();
+            let _ = child.wait();
+            return Err(MotionBridgeError::new(
+                MotionBridgeErrorKind::Cancelled,
+                "motion render cancelled",
+            ));
+        }
+        match child.try_wait() {
+            Ok(Some(status)) if status.success() => return Ok(()),
+            Ok(Some(_)) => {
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    "FFmpeg failed to encode the motion frame sequence",
+                ));
+            }
+            Ok(None) => std::thread::sleep(Duration::from_millis(10)),
+            Err(_) => {
+                let _ = child.kill();
+                let _ = child.wait();
+                return Err(MotionBridgeError::new(
+                    MotionBridgeErrorKind::RenderFailed,
+                    "motion encoder status could not be read",
+                ));
+            }
+        }
+    }
+}
+
+fn map_motion_error(error: MotionError) -> MotionBridgeError {
+    let kind = match error {
+        MotionError::InvalidSource(_)
+        | MotionError::InvalidRequest(_)
+        | MotionError::UnknownTemplate(_)
+        | MotionError::Manifest(_)
+        | MotionError::Sandbox(_) => MotionBridgeErrorKind::InvalidArguments,
+        MotionError::RendererUnavailable(_) => MotionBridgeErrorKind::CapabilityUnavailable,
+        MotionError::Cancelled => MotionBridgeErrorKind::Cancelled,
+        MotionError::Timeout(_) | MotionError::RenderFailed(_) | MotionError::Io(_) => {
+            MotionBridgeErrorKind::RenderFailed
+        }
+    };
+    MotionBridgeError::new(kind, error.to_string())
+}
+
+fn io_motion_error(error: std::io::Error) -> MotionBridgeError {
+    MotionBridgeError::new(
+        MotionBridgeErrorKind::RenderFailed,
+        format!("motion output preparation failed: {error}"),
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn output_metadata() -> MotionOutputMetadata {
+        MotionOutputMetadata {
+            renderer: "motion-canvas".into(),
+            renderer_version: "3.17.2".into(),
+            output_file: "output.mp4".into(),
+            fps: 30.0,
+            width: 1920,
+            height: 1080,
+            duration_frames: 90,
+            duration_seconds: 3.0,
+            content_hash: "ab".repeat(32),
+        }
+    }
+
+    #[test]
+    fn motion_result_rejects_malformed_or_mismatched_metadata() {
+        let expected = output_metadata();
+        assert_eq!(
+            validate_motion_result(b"not-json", &expected)
+                .unwrap_err()
+                .message,
+            "motion-result.json is malformed"
+        );
+        let mut mismatched = expected.clone();
+        mismatched.output_file = "../output.mp4".into();
+        assert_eq!(
+            validate_motion_result(&serde_json::to_vec(&mismatched).unwrap(), &expected)
+                .unwrap_err()
+                .message,
+            "motion-result.json did not match the validated output"
+        );
+        validate_motion_result(&serde_json::to_vec(&expected).unwrap(), &expected).unwrap();
+    }
+}
diff --git a/src-tauri/src/playback/audio.rs b/src-tauri/src/playback/audio.rs
index 9cde768f..c21753eb 100644
--- a/src-tauri/src/playback/audio.rs
+++ b/src-tauri/src/playback/audio.rs
@@ -2,19 +2,17 @@
 //!
 //! The acceptance is "audio drives the playhead; video follows (dropping frames
 //! to stay in sync)". [`try_build_clock`] realises that: when the timeline carries
-//! sound it pre-mixes the whole timeline to one **interleaved stereo** buffer at
-//! the cpal device sample rate, plays it through a dedicated cpal output thread,
+//! sound it schedules bounded **interleaved stereo** windows at the cpal device
+//! sample rate, plays them through a dedicated cpal output thread,
 //! and exposes the device's frame position as [`AudioClock`] — the master clock
 //! the render loop reads to pick its target video frame. A silent timeline falls
 //! back to the wall-clock [`InstantClock`] PR1 ships.
 //!
-//! ## Why preload-mix (not chunked streaming)
-//! The cpal callback must never block or allocate. Pre-mixing to an immutable
-//! buffer makes the callback a lock-free copy from `buffer[pos..]` (advancing one
-//! `AtomicU64`), which is the simplest correct master clock — no live decode race
-//! in the real-time audio thread. The cost is an up-front decode (off the IPC
-//! thread, see `commands.rs`) + memory for the mix; chunked / background-filled
-//! streaming for very long timelines is the remaining half of #160.
+//! The cpal callback never blocks or allocates. A single producer decodes and
+//! mixes fixed windows into a bounded channel; the callback uses only atomics
+//! and non-blocking `try_recv`, emitting silence on underrun. Seek advances a
+//! generation, cancels the old decode, and makes both producer and consumer
+//! discard stale windows before audible output resumes.
 //!
 //! Stereo is mixed once and mapped to the device's channel count in the callback
 //! (mono downmix / >2 zero-fill). The mixing math mirrors the proven export
@@ -24,16 +22,18 @@ use std::collections::HashMap;
 use std::panic::{catch_unwind, AssertUnwindSafe};
 use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
 use std::sync::mpsc::{self, Receiver, Sender, SyncSender, TrySendError};
-use std::sync::{Arc, OnceLock};
+use std::sync::{Arc, Mutex, OnceLock};
 use std::thread::{self, JoinHandle};
 use std::time::{Duration, Instant};
 
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
 use cpal::{FromSample, SizedSample};
+use crossbeam_channel::{bounded, Receiver as ChunkReceiver, Sender as ChunkSender};
 
-use opentake_domain::{Clip, ClipType, Timeline};
+use opentake_domain::{AudioDenoise, Clip, ClipType, Timeline};
 use opentake_media::{
-    decode_pcm_interleaved_cancellable, MediaCancelToken, MediaError, PcmFormat, PcmSpec,
+    decode_pcm_interleaved_cancellable, encode::mix::apply_true_peak_ceiling, MediaCancelToken,
+    MediaError, PcmFormat, PcmSpec,
 };
 
 use super::engine::{InstantClock, PlaybackClock};
@@ -45,8 +45,10 @@ const FALLBACK_SAMPLE_RATE: u32 = 48_000;
 /// The mix is always interleaved stereo; the callback maps it to the device's
 /// channel count.
 const MIX_CHANNELS: usize = 2;
-const MAX_SESSION_PREMIX_BYTES: usize = 256 * 1024 * 1024;
 const MIX_CANCEL_CHUNK_FRAMES: usize = 4 * 1024;
+const STREAM_WINDOW_SECONDS: usize = 2;
+const STREAM_WINDOW_CAPACITY: usize = 4;
+const STREAM_SEND_POLL: Duration = Duration::from_millis(5);
 const CALLBACK_START_TIMEOUT: Duration = Duration::from_secs(1);
 const CALLBACK_POLL_INTERVAL: Duration = Duration::from_millis(5);
 const CALLBACKS_REQUIRED_FOR_LIVENESS: u64 = 2;
@@ -179,73 +181,116 @@ fn audio_allocation_failed(detail: impl std::fmt::Display) -> MediaError {
     MediaError::Decode(format!("audio_allocation_failed: {detail}"))
 }
 
-fn checked_audio_bytes(frames: usize) -> Result<usize, MediaError> {
-    frames
-        .checked_mul(MIX_CHANNELS)
-        .and_then(|samples| samples.checked_mul(std::mem::size_of::<f32>()))
-        .ok_or_else(|| audio_buffer_too_large("stereo f32 byte count overflow"))
+struct AudioStreamControl {
+    generation: AtomicU64,
+    requested_start: AtomicU64,
+    stopped: AtomicBool,
+    underruns: AtomicU64,
+    active_decode: Mutex<Option<MediaCancelToken>>,
 }
 
-fn checked_gain_bytes(frames: usize) -> Result<usize, MediaError> {
-    frames
-        .checked_mul(std::mem::size_of::<f32>())
-        .ok_or_else(|| audio_buffer_too_large("gain byte count overflow"))
-}
+impl AudioStreamControl {
+    fn new(start_frame: u64) -> Self {
+        Self {
+            generation: AtomicU64::new(0),
+            requested_start: AtomicU64::new(start_frame),
+            stopped: AtomicBool::new(false),
+            underruns: AtomicU64::new(0),
+            active_decode: Mutex::new(None),
+        }
+    }
 
-fn frames_at_rate(timeline_frames: i32, fps: i32, rate: u32) -> Result<usize, MediaError> {
-    if timeline_frames <= 0 || fps <= 0 || rate == 0 {
-        return Ok(0);
+    fn request_seek(&self, start_frame: u64) {
+        self.requested_start.store(start_frame, Ordering::Release);
+        self.generation.fetch_add(1, Ordering::AcqRel);
+        if let Some(cancel) = self
+            .active_decode
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .as_ref()
+        {
+            cancel.cancel();
+        }
     }
-    let frames = (f64::from(timeline_frames) / f64::from(fps) * f64::from(rate)).ceil();
-    if !frames.is_finite() || frames > usize::MAX as f64 {
-        return Err(audio_buffer_too_large("audio frame count exceeds usize"));
+
+    fn stop(&self) {
+        self.stopped.store(true, Ordering::Release);
+        if let Some(cancel) = self
+            .active_decode
+            .lock()
+            .unwrap_or_else(|poisoned| poisoned.into_inner())
+            .as_ref()
+        {
+            cancel.cancel();
+        }
     }
-    Ok(frames as usize)
 }
 
-fn projected_session_peak_bytes(timeline: &Timeline, rate: u32) -> Result<usize, MediaError> {
-    let mut retained_bytes = 0_usize;
-    let mut max_stage_bytes = 0_usize;
-    let mut max_mix_frames = 0_usize;
-    for track in &timeline.tracks {
-        if track.muted {
-            continue;
+#[derive(Debug)]
+struct AudioStreamChunk {
+    generation: u64,
+    start_frame: u64,
+    samples: Vec<f32>,
+}
+
+struct AudioStreamConsumer {
+    receiver: ChunkReceiver<Result<AudioStreamChunk, MediaError>>,
+    control: Arc<AudioStreamControl>,
+    current: Option<AudioStreamChunk>,
+}
+
+impl AudioStreamConsumer {
+    fn discard_stale(&mut self) {
+        let generation = self.control.generation.load(Ordering::Acquire);
+        if self
+            .current
+            .as_ref()
+            .is_some_and(|chunk| chunk.generation != generation)
+        {
+            self.current = None;
         }
-        for clip in &track.clips {
-            if clip.media_type != ClipType::Audio && clip.media_type != ClipType::Video {
-                continue;
+        if self.current.is_some() {
+            return;
+        }
+        while let Ok(item) = self.receiver.try_recv() {
+            match item {
+                Ok(chunk) if chunk.generation == generation => {
+                    self.current = Some(chunk);
+                    break;
+                }
+                Ok(_) => {}
+                Err(error) => {
+                    eprintln!("[audio] streaming decode failed: {error}");
+                }
             }
-            let source_frames = clip.source_frames_consumed().max(0);
-            let expected_frames = frames_at_rate(source_frames, timeline.fps, rate)?;
-            let bounded_frames = expected_frames
-                .checked_add(1)
-                .ok_or_else(|| audio_buffer_too_large("PCM slack frame overflow"))?;
-            let decoded_bytes = checked_audio_bytes(bounded_frames)?;
-            let gain_bytes = checked_gain_bytes(bounded_frames)?;
-
-            let conversion_stage = retained_bytes
-                .checked_add(decoded_bytes)
-                .and_then(|bytes| bytes.checked_add(decoded_bytes))
-                .ok_or_else(|| audio_buffer_too_large("PCM conversion peak overflow"))?;
-            max_stage_bytes = max_stage_bytes.max(conversion_stage);
-
-            retained_bytes = retained_bytes
-                .checked_add(decoded_bytes)
-                .and_then(|bytes| bytes.checked_add(gain_bytes))
-                .ok_or_else(|| audio_buffer_too_large("retained audio peak overflow"))?;
-            max_stage_bytes = max_stage_bytes.max(retained_bytes);
-
-            let start_frames = frames_at_rate(clip.start_frame.max(0), timeline.fps, rate)?;
-            let end_frames = start_frames
-                .checked_add(bounded_frames)
-                .ok_or_else(|| audio_buffer_too_large("mix frame extent overflow"))?;
-            max_mix_frames = max_mix_frames.max(end_frames);
         }
     }
-    let mix_stage = retained_bytes
-        .checked_add(checked_audio_bytes(max_mix_frames)?)
-        .ok_or_else(|| audio_buffer_too_large("final mix peak overflow"))?;
-    Ok(max_stage_bytes.max(mix_stage))
+
+    fn sample_frame(&mut self, frame: u64) -> (f32, f32) {
+        let generation = self.control.generation.load(Ordering::Acquire);
+        if self.current.as_ref().is_none_or(|chunk| {
+            let frames = chunk.samples.len() / MIX_CHANNELS;
+            chunk.generation != generation
+                || frame < chunk.start_frame
+                || frame >= chunk.start_frame.saturating_add(frames as u64)
+        }) {
+            self.current = None;
+            self.discard_stale();
+        }
+        if let Some(chunk) = self.current.as_ref() {
+            let offset = frame.saturating_sub(chunk.start_frame) as usize * MIX_CHANNELS;
+            if offset + 1 < chunk.samples.len() {
+                return (chunk.samples[offset], chunk.samples[offset + 1]);
+            }
+        }
+        self.control.underruns.fetch_add(1, Ordering::Relaxed);
+        (0.0, 0.0)
+    }
+}
+
+enum PlaybackSamples {
+    Buffered(Arc<Vec<f32>>),
+    Streaming(AudioStreamConsumer),
 }
 
 /// Audio master clock: the playhead derives from the device frame position
@@ -258,6 +303,7 @@ pub struct AudioClock {
     rate: u32,
     /// Project fps (for `seek`, which has no fps argument).
     fps: i32,
+    stream: Option<Arc<AudioStreamControl>>,
 }
 
 impl PlaybackClock for AudioClock {
@@ -277,6 +323,9 @@ impl PlaybackClock for AudioClock {
         let pos = ((frame.max(0) as f64 / fps as f64) * self.rate as f64).round() as u64;
         // Release pairs with the callback's AcqRel fetch_add so it observes the seek.
         self.pos.store(pos, Ordering::Release);
+        if let Some(stream) = &self.stream {
+            stream.request_seek(pos);
+        }
     }
 }
 
@@ -287,6 +336,8 @@ pub struct AudioPlayback {
     control_tx: Sender<AudioCmd>,
     paused: Arc<AtomicBool>,
     handle: Option<JoinHandle<()>>,
+    stream_control: Option<Arc<AudioStreamControl>>,
+    stream_producer: Option<JoinHandle<()>>,
 }
 
 enum AudioCmd {
@@ -314,7 +365,7 @@ impl AudioPlayback {
             .name("opentake-audio".to_string())
             .spawn(move || {
                 audio_thread(
-                    buffer,
+                    PlaybackSamples::Buffered(buffer),
                     pos,
                     thread_paused,
                     thread_callback_epoch,
@@ -328,6 +379,8 @@ impl AudioPlayback {
                 control_tx,
                 paused,
                 handle: Some(handle),
+                stream_control: None,
+                stream_producer: None,
             }),
             Ok(Err(e)) => {
                 let _ = handle.join();
@@ -337,6 +390,59 @@ impl AudioPlayback {
         }
     }
 
+    fn start_stream(
+        consumer: AudioStreamConsumer,
+        stream_control: Arc<AudioStreamControl>,
+        stream_producer: JoinHandle<()>,
+        pos: Arc<AtomicU64>,
+        paused: Arc<AtomicBool>,
+    ) -> Result<Self, String> {
+        let (control_tx, control_rx) = mpsc::channel::<AudioCmd>();
+        let (ready_tx, ready_rx) = mpsc::channel::<Result<(), String>>();
+        let thread_paused = Arc::clone(&paused);
+        let callback_epoch = Arc::new(AtomicU64::new(0));
+        let thread_callback_epoch = Arc::clone(&callback_epoch);
+        let handle = match thread::Builder::new()
+            .name("opentake-audio".to_string())
+            .spawn(move || {
+                audio_thread(
+                    PlaybackSamples::Streaming(consumer),
+                    pos,
+                    thread_paused,
+                    thread_callback_epoch,
+                    control_rx,
+                    ready_tx,
+                )
+            }) {
+            Ok(handle) => handle,
+            Err(error) => {
+                stream_control.stop();
+                let _ = stream_producer.join();
+                return Err(format!("spawn audio thread: {error}"));
+            }
+        };
+        match ready_rx.recv() {
+            Ok(Ok(())) => Ok(Self {
+                control_tx,
+                paused,
+                handle: Some(handle),
+                stream_control: Some(stream_control),
+                stream_producer: Some(stream_producer),
+            }),
+            Ok(Err(error)) => {
+                stream_control.stop();
+                let _ = handle.join();
+                let _ = stream_producer.join();
+                Err(error)
+            }
+            Err(_) => {
+                stream_control.stop();
+                let _ = stream_producer.join();
+                Err("audio thread exited before init".to_string())
+            }
+        }
+    }
+
     pub fn pause(&self) -> Result<(), String> {
         self.paused.store(true, Ordering::Release);
         self.control(AudioCmd::Pause)
@@ -377,8 +483,46 @@ impl AudioPlayback {
 
     pub fn request_stop(mut self) -> Option<JoinHandle<()>> {
         self.mute();
+        if let Some(control) = &self.stream_control {
+            control.stop();
+        }
         let _ = self.control_tx.send(AudioCmd::Stop);
-        self.handle.take()
+        let audio = self.handle.take();
+        let producer = self.stream_producer.take();
+        match (audio, producer) {
+            (Some(audio), Some(producer)) => {
+                let joins = Arc::new(Mutex::new(Some((audio, producer))));
+                let worker_joins = Arc::clone(&joins);
+                match thread::Builder::new()
+                    .name("opentake-audio-stop".to_string())
+                    .spawn(move || {
+                        if let Some((audio, producer)) = worker_joins
+                            .lock()
+                            .unwrap_or_else(|poisoned| poisoned.into_inner())
+                            .take()
+                        {
+                            let _ = audio.join();
+                            let _ = producer.join();
+                        }
+                    }) {
+                    Ok(handle) => Some(handle),
+                    Err(_) => {
+                        if let Some((audio, producer)) = joins
+                            .lock()
+                            .unwrap_or_else(|poisoned| poisoned.into_inner())
+                            .take()
+                        {
+                            let _ = audio.join();
+                            let _ = producer.join();
+                        }
+                        None
+                    }
+                }
+            }
+            (Some(audio), None) => Some(audio),
+            (None, Some(producer)) => Some(producer),
+            (None, None) => None,
+        }
     }
 
     #[cfg(test)]
@@ -404,6 +548,8 @@ impl AudioPlayback {
                 control_tx,
                 paused: Arc::clone(&paused),
                 handle: Some(handle),
+                stream_control: None,
+                stream_producer: None,
             },
             paused,
             stopped_rx,
@@ -432,6 +578,8 @@ impl AudioPlayback {
                 control_tx,
                 paused: Arc::clone(&paused),
                 handle: Some(handle),
+                stream_control: None,
+                stream_producer: None,
             },
             paused,
         )
@@ -462,6 +610,8 @@ impl AudioPlayback {
                 control_tx,
                 paused: Arc::clone(&paused),
                 handle: Some(handle),
+                stream_control: None,
+                stream_producer: None,
             },
             paused,
             stopped_rx,
@@ -472,24 +622,30 @@ impl AudioPlayback {
 
 impl Drop for AudioPlayback {
     fn drop(&mut self) {
+        if let Some(control) = &self.stream_control {
+            control.stop();
+        }
         let _ = self.control_tx.send(AudioCmd::Stop);
         if let Some(handle) = self.handle.take() {
             let _ = handle.join();
         }
+        if let Some(handle) = self.stream_producer.take() {
+            let _ = handle.join();
+        }
     }
 }
 
 /// The audio thread: build + play the output stream, report the result, then park
 /// (holding the `!Send` stream alive) until a stop is requested.
 fn audio_thread(
-    buffer: Arc<Vec<f32>>,
+    samples: PlaybackSamples,
     pos: Arc<AtomicU64>,
     paused: Arc<AtomicBool>,
     callback_epoch: Arc<AtomicU64>,
     control_rx: Receiver<AudioCmd>,
     ready_tx: Sender<Result<(), String>>,
 ) {
-    match build_and_play(&buffer, &pos, &paused, &callback_epoch) {
+    match build_and_play(samples, &pos, &paused, &callback_epoch) {
         Ok(stream) => {
             let _ = ready_tx.send(Ok(()));
             while let Ok(command) = control_rx.recv() {
@@ -521,7 +677,7 @@ fn audio_thread(
 /// Acquire the default output device + config, build the typed output stream, and
 /// start it. The returned `Stream` must stay alive on the calling thread.
 fn build_and_play(
-    buffer: &Arc<Vec<f32>>,
+    samples: PlaybackSamples,
     pos: &Arc<AtomicU64>,
     paused: &Arc<AtomicBool>,
     callback_epoch: &Arc<AtomicU64>,
@@ -539,7 +695,7 @@ fn build_and_play(
         sample_format,
         &device,
         &config,
-        buffer.clone(),
+        samples,
         pos.clone(),
         paused.clone(),
         Arc::clone(callback_epoch),
@@ -574,7 +730,7 @@ fn build_stream(
     format: cpal::SampleFormat,
     device: &cpal::Device,
     config: &cpal::StreamConfig,
-    buffer: Arc<Vec<f32>>,
+    samples: PlaybackSamples,
     pos: Arc<AtomicU64>,
     paused: Arc<AtomicBool>,
     callback_epoch: Arc<AtomicU64>,
@@ -584,34 +740,34 @@ fn build_stream(
     // instead of silently falling back to the wall clock.
     match format {
         cpal::SampleFormat::F32 => {
-            out_stream::<f32>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<f32>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::F64 => {
-            out_stream::<f64>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<f64>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::I8 => {
-            out_stream::<i8>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<i8>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::I16 => {
-            out_stream::<i16>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<i16>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::I32 => {
-            out_stream::<i32>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<i32>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::I64 => {
-            out_stream::<i64>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<i64>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::U8 => {
-            out_stream::<u8>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<u8>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::U16 => {
-            out_stream::<u16>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<u16>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::U32 => {
-            out_stream::<u32>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<u32>(device, config, samples, pos, paused, callback_epoch)
         }
         cpal::SampleFormat::U64 => {
-            out_stream::<u64>(device, config, buffer, pos, paused, callback_epoch)
+            out_stream::<u64>(device, config, samples, pos, paused, callback_epoch)
         }
         other => Err(format!("unsupported cpal sample format: {other}")),
     }
@@ -640,7 +796,7 @@ fn write_frame<T: cpal::Sample + FromSample<f32>>(frame: &mut [T], left: f32, ri
 fn out_stream<T>(
     device: &cpal::Device,
     config: &cpal::StreamConfig,
-    buffer: Arc<Vec<f32>>,
+    mut samples: PlaybackSamples,
     pos: Arc<AtomicU64>,
     paused: Arc<AtomicBool>,
     callback_epoch: Arc<AtomicU64>,
@@ -660,18 +816,28 @@ where
                 // clock. A concurrent `seek` (store) is honored on the next
                 // callback; within a block we play from the claimed start.
                 if paused.load(Ordering::Acquire) {
+                    if let PlaybackSamples::Streaming(consumer) = &mut samples {
+                        consumer.discard_stale();
+                    }
                     for sample in data.iter_mut() {
                         *sample = T::from_sample(0.0f32);
                     }
                     return;
                 }
-                let start = pos.fetch_add(out_frames as u64, Ordering::AcqRel) as usize;
+                let start = pos.fetch_add(out_frames as u64, Ordering::AcqRel);
                 for (i, frame) in data.chunks_mut(channels).enumerate() {
-                    let base = (start + i) * MIX_CHANNELS;
-                    let (left, right) = if base + 1 < buffer.len() {
-                        (buffer[base], buffer[base + 1])
-                    } else {
-                        (0.0, 0.0) // past the mix end → silence (video may outlast audio)
+                    let audio_frame = start.saturating_add(i as u64);
+                    let (left, right) = match &mut samples {
+                        PlaybackSamples::Buffered(buffer) => {
+                            let base = usize::try_from(audio_frame)
+                                .ok()
+                                .and_then(|frame| frame.checked_mul(MIX_CHANNELS));
+                            match base.filter(|base| base + 1 < buffer.len()) {
+                                Some(base) => (buffer[base], buffer[base + 1]),
+                                None => (0.0, 0.0),
+                            }
+                        }
+                        PlaybackSamples::Streaming(consumer) => consumer.sample_frame(audio_frame),
                     };
                     write_frame(frame, left, right);
                 }
@@ -740,6 +906,9 @@ struct StereoClip {
     interleaved: Vec<f32>,
     /// Per-output-frame gain (length = frames; empty = unity throughout).
     gains: Vec<f32>,
+    /// User true-peak ceiling. The mixer keeps the same codec reconstruction
+    /// safety margin as export so native preview does not audition hotter peaks.
+    true_peak_ceiling_dbtp: Option<f64>,
 }
 
 /// Decode one clip's visible audio window into a placed [`StereoClip`] at `rate`
@@ -768,6 +937,8 @@ fn project_clip_audio_stereo(
     };
     let interleaved =
         decode_pcm_interleaved_cancellable(&info.path, &spec, Some((lo, hi)), cancel)?;
+    let interleaved =
+        apply_preview_denoise(&interleaved, MIX_CHANNELS, rate, clip.audio_denoise, cancel)?;
     let frames = interleaved.len() / MIX_CHANNELS;
     if frames == 0 {
         return Ok(None);
@@ -794,12 +965,53 @@ fn project_clip_audio_stereo(
         start_frame,
         interleaved,
         gains: if all_unity { Vec::new() } else { gains },
+        true_peak_ceiling_dbtp: clip
+            .loudness_normalization
+            .map(|normalization| normalization.true_peak_ceiling_dbtp),
     }))
 }
 
-/// Sum placed stereo clips into one interleaved buffer, applying per-frame gains
-/// and hard-limiting to [-1, 1] (mirrors the export mixdown, per channel).
-fn mix_stereo(clips: &[StereoClip], cancel: &MediaCancelToken) -> Result<Vec<f32>, MediaError> {
+fn apply_preview_denoise(
+    samples: &[f32],
+    channels: usize,
+    sample_rate: u32,
+    config: Option<AudioDenoise>,
+    cancel: &MediaCancelToken,
+) -> Result<Vec<f32>, MediaError> {
+    let Some(config) = config.filter(|config| config.preview_enabled) else {
+        return Ok(samples.to_vec());
+    };
+    opentake_media::analysis::denoise_interleaved(
+        samples,
+        channels,
+        sample_rate,
+        config,
+        cancel,
+        None,
+    )
+    .map_err(|error| match error {
+        opentake_media::analysis::DenoiseError::Cancelled => MediaError::Cancelled,
+        other => MediaError::Decode(other.to_string()),
+    })
+}
+
+/// Visit a placed stereo mix in bounded windows. Only one `window_frames`
+/// scratch buffer is live at a time regardless of the total timeline extent.
+fn mix_stereo_windows(
+    clips: &[StereoClip],
+    window_frames: usize,
+    cancel: &MediaCancelToken,
+    mut emit: impl FnMut(usize, &[f32]) -> Result<(), MediaError>,
+) -> Result<(), MediaError> {
+    if window_frames == 0 {
+        return Err(MediaError::Decode(
+            "audio mix window must contain at least one frame".to_string(),
+        ));
+    }
+    let true_peak_ceiling_dbtp = clips
+        .iter()
+        .filter_map(|clip| clip.true_peak_ceiling_dbtp)
+        .min_by(f64::total_cmp);
     let total_frames = clips
         .iter()
         .map(|c| {
@@ -811,58 +1023,134 @@ fn mix_stereo(clips: &[StereoClip], cancel: &MediaCancelToken) -> Result<Vec<f32
         .into_iter()
         .max()
         .unwrap_or(0);
-    let total_samples = total_frames
-        .checked_mul(MIX_CHANNELS)
-        .ok_or_else(|| audio_buffer_too_large("mix sample count overflow"))?;
-    let mut out = Vec::new();
-    out.try_reserve_exact(total_samples).map_err(|error| {
-        audio_allocation_failed(format!("mix reserve {total_samples}: {error}"))
-    })?;
-    out.resize(total_samples, 0.0);
-    for c in clips {
-        let frames = c.interleaved.len() / MIX_CHANNELS;
-        for chunk_start in (0..frames).step_by(MIX_CANCEL_CHUNK_FRAMES) {
-            if cancel.checkpoint() {
-                return Err(MediaError::Cancelled);
-            }
-            let chunk_end = (chunk_start + MIX_CANCEL_CHUNK_FRAMES).min(frames);
-            for k in chunk_start..chunk_end {
-                let g = if c.gains.is_empty() { 1.0 } else { c.gains[k] };
-                let o = (c.start_frame + k) * MIX_CHANNELS;
-                out[o] += c.interleaved[k * MIX_CHANNELS] * g;
-                out[o + 1] += c.interleaved[k * MIX_CHANNELS + 1] * g;
-            }
-        }
-    }
-    for chunk in out.chunks_mut(MIX_CANCEL_CHUNK_FRAMES * MIX_CHANNELS) {
+    for window_start in (0..total_frames).step_by(window_frames) {
         if cancel.checkpoint() {
             return Err(MediaError::Cancelled);
         }
-        for value in chunk {
+        let window_end = window_start.saturating_add(window_frames).min(total_frames);
+        let window_samples = window_end
+            .saturating_sub(window_start)
+            .checked_mul(MIX_CHANNELS)
+            .ok_or_else(|| audio_buffer_too_large("mix window sample count overflow"))?;
+        let mut out = Vec::new();
+        out.try_reserve_exact(window_samples).map_err(|error| {
+            audio_allocation_failed(format!("mix window reserve {window_samples}: {error}"))
+        })?;
+        out.resize(window_samples, 0.0);
+        for clip in clips {
+            let clip_frames = clip.interleaved.len() / MIX_CHANNELS;
+            let clip_end = clip.start_frame.saturating_add(clip_frames);
+            let overlap_start = window_start.max(clip.start_frame);
+            let overlap_end = window_end.min(clip_end);
+            if overlap_start >= overlap_end {
+                continue;
+            }
+            for chunk_start in (overlap_start..overlap_end).step_by(MIX_CANCEL_CHUNK_FRAMES) {
+                if cancel.checkpoint() {
+                    return Err(MediaError::Cancelled);
+                }
+                let chunk_end = chunk_start
+                    .saturating_add(MIX_CANCEL_CHUNK_FRAMES)
+                    .min(overlap_end);
+                for timeline_frame in chunk_start..chunk_end {
+                    let clip_frame = timeline_frame - clip.start_frame;
+                    let gain = if clip.gains.is_empty() {
+                        1.0
+                    } else {
+                        clip.gains[clip_frame]
+                    };
+                    let output = (timeline_frame - window_start) * MIX_CHANNELS;
+                    let input = clip_frame * MIX_CHANNELS;
+                    out[output] += clip.interleaved[input] * gain;
+                    out[output + 1] += clip.interleaved[input + 1] * gain;
+                }
+            }
+        }
+        for value in &mut out {
             *value = value.clamp(-1.0, 1.0);
         }
+        apply_true_peak_ceiling(&mut out, true_peak_ceiling_dbtp);
+        emit(window_start, &out)?;
     }
+    Ok(())
+}
+
+/// Sum placed stereo clips into one interleaved buffer, applying per-frame gains
+/// and hard-limiting to [-1, 1] (mirrors the export mixdown, per channel).
+fn mix_stereo(clips: &[StereoClip], cancel: &MediaCancelToken) -> Result<Vec<f32>, MediaError> {
+    let mut out = Vec::new();
+    mix_stereo_windows(
+        clips,
+        MIX_CANCEL_CHUNK_FRAMES,
+        cancel,
+        |_start_frame, samples| {
+            out.try_reserve(samples.len()).map_err(|error| {
+                audio_allocation_failed(format!("mix output reserve {}: {error}", samples.len()))
+            })?;
+            out.extend_from_slice(samples);
+            Ok(())
+        },
+    )?;
     Ok(out)
 }
 
-/// Pre-mix every audio-bearing clip into one interleaved stereo buffer at `rate`.
-/// Empty when the timeline has no audio (→ caller uses the wall clock).
-fn mix_timeline_stereo(
+fn retime_interleaved_stereo(samples: &[f32], target_frames: usize) -> Vec<f32> {
+    let source_frames = samples.len() / MIX_CHANNELS;
+    if source_frames == 0 || target_frames == 0 {
+        return Vec::new();
+    }
+    if source_frames == target_frames {
+        return samples[..source_frames * MIX_CHANNELS].to_vec();
+    }
+    let mut output = Vec::with_capacity(target_frames * MIX_CHANNELS);
+    let source_span = source_frames.saturating_sub(1) as f64;
+    let target_span = target_frames.saturating_sub(1).max(1) as f64;
+    for frame in 0..target_frames {
+        let source = if target_frames == 1 {
+            0.0
+        } else {
+            frame as f64 * source_span / target_span
+        };
+        let lo = source.floor() as usize;
+        let hi = source.ceil() as usize;
+        let fraction = (source - lo as f64) as f32;
+        for channel in 0..MIX_CHANNELS {
+            let a = samples[lo * MIX_CHANNELS + channel];
+            let b = samples[hi * MIX_CHANNELS + channel];
+            output.push(a + (b - a) * fraction);
+        }
+    }
+    output
+}
+
+fn timeline_audio_frames(timeline: &Timeline, rate: u32) -> Result<u64, MediaError> {
+    if timeline.fps <= 0 || rate == 0 {
+        return Ok(0);
+    }
+    let frames = timeline.total_frames().max(0) as u64;
+    let numerator = frames
+        .checked_mul(rate as u64)
+        .ok_or_else(|| audio_buffer_too_large("streaming timeline frame extent overflow"))?;
+    numerator
+        .checked_add(timeline.fps as u64 / 2)
+        .map(|rounded| rounded / timeline.fps as u64)
+        .ok_or_else(|| audio_buffer_too_large("streaming timeline frame rounding overflow"))
+}
+
+fn mix_timeline_window(
     timeline: &Timeline,
     media: &HashMap<String, MediaInfo>,
     rate: u32,
+    window_start: u64,
+    window_frames: usize,
     cancel: &MediaCancelToken,
 ) -> Result<Vec<f32>, MediaError> {
-    if timeline.fps <= 0 || rate == 0 {
-        return Ok(Vec::new());
-    }
-    let projected_bytes = projected_session_peak_bytes(timeline, rate)?;
-    if projected_bytes > MAX_SESSION_PREMIX_BYTES {
-        return Err(audio_buffer_too_large(format!(
-            "projected {projected_bytes} bytes exceeds {MAX_SESSION_PREMIX_BYTES}"
-        )));
-    }
-    let mut clips: Vec<StereoClip> = Vec::new();
+    let sample_count = window_frames
+        .checked_mul(MIX_CHANNELS)
+        .ok_or_else(|| audio_buffer_too_large("streaming window sample count overflow"))?;
+    let mut mixed = vec![0.0_f32; sample_count];
+    let mut true_peak_ceiling_dbtp: Option<f64> = None;
+    let window_end = window_start.saturating_add(window_frames as u64);
     for track in &timeline.tracks {
         if track.muted {
             continue;
@@ -871,18 +1159,238 @@ fn mix_timeline_stereo(
             if cancel.checkpoint() {
                 return Err(MediaError::Cancelled);
             }
-            if clip.media_type != ClipType::Audio && clip.media_type != ClipType::Video {
+            if !matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+                || clip.duration_frames <= 0
+            {
+                continue;
+            }
+            let Some(info) = media.get(&clip.media_ref) else {
+                continue;
+            };
+            let clip_start = ((clip.start_frame.max(0) as f64 / timeline.fps as f64) * rate as f64)
+                .round() as u64;
+            let clip_frames = ((clip.duration_frames as f64 / timeline.fps as f64) * rate as f64)
+                .round()
+                .max(0.0) as u64;
+            let clip_end = clip_start.saturating_add(clip_frames);
+            let overlap_start = window_start.max(clip_start);
+            let overlap_end = window_end.min(clip_end);
+            if overlap_start >= overlap_end || clip_frames == 0 {
+                continue;
+            }
+            let Some((source_lo, source_hi)) = clip_source_window_secs(clip, timeline.fps) else {
                 continue;
+            };
+            let source_span = source_hi - source_lo;
+            let relative_start = (overlap_start - clip_start) as f64 / clip_frames as f64;
+            let relative_end = (overlap_end - clip_start) as f64 / clip_frames as f64;
+            let range = (
+                source_lo + source_span * relative_start,
+                source_lo + source_span * relative_end,
+            );
+            let spec = PcmSpec {
+                sample_rate: rate,
+                channels: MIX_CHANNELS as u16,
+                format: PcmFormat::F32,
+            };
+            let decoded =
+                match decode_pcm_interleaved_cancellable(&info.path, &spec, Some(range), cancel) {
+                    Ok(decoded) => decoded,
+                    Err(MediaError::NoTrack(_, _)) => continue,
+                    Err(error) => return Err(error),
+                };
+            let target_frames = (overlap_end - overlap_start) as usize;
+            let retimed = retime_interleaved_stereo(&decoded, target_frames);
+            let retimed =
+                apply_preview_denoise(&retimed, MIX_CHANNELS, rate, clip.audio_denoise, cancel)?;
+            let frames_per_timeline_frame = rate as f64 / timeline.fps as f64;
+            for frame in 0..target_frames.min(retimed.len() / MIX_CHANNELS) {
+                let timeline_sample = overlap_start.saturating_add(frame as u64);
+                let timeline_frame =
+                    (timeline_sample as f64 / frames_per_timeline_frame).floor() as i32;
+                let gain = clip.volume_at(timeline_frame) as f32;
+                let output = (overlap_start - window_start) as usize + frame;
+                let output = output * MIX_CHANNELS;
+                mixed[output] += retimed[frame * MIX_CHANNELS] * gain;
+                mixed[output + 1] += retimed[frame * MIX_CHANNELS + 1] * gain;
             }
-            if let Some(sc) = project_clip_audio_stereo(clip, media, timeline.fps, rate, cancel)? {
-                clips.push(sc);
+            if let Some(ceiling) = clip
+                .loudness_normalization
+                .map(|normalization| normalization.true_peak_ceiling_dbtp)
+            {
+                true_peak_ceiling_dbtp =
+                    Some(true_peak_ceiling_dbtp.map_or(ceiling, |current| current.min(ceiling)));
             }
         }
     }
-    if clips.is_empty() {
-        return Ok(Vec::new());
+    for sample in &mut mixed {
+        *sample = sample.clamp(-1.0, 1.0);
+    }
+    apply_true_peak_ceiling(&mut mixed, true_peak_ceiling_dbtp);
+    Ok(mixed)
+}
+
+struct PreparedTimelineAudio {
+    consumer: AudioStreamConsumer,
+    control: Arc<AudioStreamControl>,
+    producer: JoinHandle<()>,
+}
+
+fn send_stream_chunk(
+    sender: &ChunkSender<Result<AudioStreamChunk, MediaError>>,
+    mut chunk: Result<AudioStreamChunk, MediaError>,
+    control: &AudioStreamControl,
+    generation: u64,
+) -> bool {
+    loop {
+        if control.stopped.load(Ordering::Acquire)
+            || control.generation.load(Ordering::Acquire) != generation
+        {
+            return false;
+        }
+        match sender.try_send(chunk) {
+            Ok(()) => return true,
+            Err(crossbeam_channel::TrySendError::Full(returned)) => {
+                chunk = returned;
+                thread::sleep(STREAM_SEND_POLL);
+            }
+            Err(crossbeam_channel::TrySendError::Disconnected(_)) => return false,
+        }
     }
-    mix_stereo(&clips, cancel)
+}
+
+/// Prepare bounded timeline-audio scheduling at `rate`. The initial window is
+/// mixed synchronously so decode failures surface before playback ownership is
+/// published; all subsequent windows are produced on one bounded worker.
+fn mix_timeline_stereo(
+    timeline: &Timeline,
+    media: &HashMap<String, MediaInfo>,
+    rate: u32,
+    start_frame: u64,
+    cancel: &MediaCancelToken,
+) -> Result<Option<PreparedTimelineAudio>, MediaError> {
+    if timeline.fps <= 0 || rate == 0 {
+        return Ok(None);
+    }
+    let has_candidates = timeline
+        .tracks
+        .iter()
+        .filter(|track| !track.muted)
+        .any(|track| {
+            track.clips.iter().any(|clip| {
+                matches!(clip.media_type, ClipType::Audio | ClipType::Video)
+                    && clip.duration_frames > 0
+                    && media.contains_key(&clip.media_ref)
+            })
+        });
+    if !has_candidates {
+        return Ok(None);
+    }
+    let total_frames = timeline_audio_frames(timeline, rate)?;
+    if start_frame >= total_frames {
+        return Ok(None);
+    }
+    let window_frames = (rate as usize)
+        .checked_mul(STREAM_WINDOW_SECONDS)
+        .ok_or_else(|| audio_buffer_too_large("streaming window frame overflow"))?;
+    let first_len = (total_frames - start_frame).min(window_frames as u64) as usize;
+    let first_samples = mix_timeline_window(timeline, media, rate, start_frame, first_len, cancel)?;
+    let (sender, receiver) = bounded(STREAM_WINDOW_CAPACITY);
+    sender
+        .send(Ok(AudioStreamChunk {
+            generation: 0,
+            start_frame,
+            samples: first_samples,
+        }))
+        .map_err(|_| MediaError::Decode("audio stream queue closed during prefill".to_string()))?;
+    let control = Arc::new(AudioStreamControl::new(start_frame));
+    let producer_control = Arc::clone(&control);
+    let producer_timeline = timeline.clone();
+    let producer_media = media.clone();
+    let producer = thread::Builder::new()
+        .name("opentake-audio-fill".to_string())
+        .spawn(move || {
+            let mut generation = 0_u64;
+            let mut next_frame = start_frame.saturating_add(first_len as u64);
+            loop {
+                if producer_control.stopped.load(Ordering::Acquire) {
+                    break;
+                }
+                let observed = producer_control.generation.load(Ordering::Acquire);
+                if observed != generation {
+                    generation = observed;
+                    next_frame = producer_control.requested_start.load(Ordering::Acquire);
+                }
+                if next_frame >= total_frames {
+                    thread::sleep(STREAM_SEND_POLL);
+                    continue;
+                }
+                let len = (total_frames - next_frame).min(window_frames as u64) as usize;
+                let window_cancel = MediaCancelToken::new();
+                *producer_control
+                    .active_decode
+                    .lock()
+                    .unwrap_or_else(|poisoned| poisoned.into_inner()) = Some(window_cancel.clone());
+                if producer_control.generation.load(Ordering::Acquire) != generation {
+                    window_cancel.cancel();
+                    producer_control
+                        .active_decode
+                        .lock()
+                        .unwrap_or_else(|poisoned| poisoned.into_inner())
+                        .take();
+                    continue;
+                }
+                let result = mix_timeline_window(
+                    &producer_timeline,
+                    &producer_media,
+                    rate,
+                    next_frame,
+                    len,
+                    &window_cancel,
+                );
+                producer_control
+                    .active_decode
+                    .lock()
+                    .unwrap_or_else(|poisoned| poisoned.into_inner())
+                    .take();
+                if producer_control.generation.load(Ordering::Acquire) != generation {
+                    continue;
+                }
+                match result {
+                    Ok(samples) => {
+                        if !send_stream_chunk(
+                            &sender,
+                            Ok(AudioStreamChunk {
+                                generation,
+                                start_frame: next_frame,
+                                samples,
+                            }),
+                            &producer_control,
+                            generation,
+                        ) {
+                            continue;
+                        }
+                        next_frame = next_frame.saturating_add(len as u64);
+                    }
+                    Err(MediaError::Cancelled) => continue,
+                    Err(error) => {
+                        let _ =
+                            send_stream_chunk(&sender, Err(error), &producer_control, generation);
+                        break;
+                    }
+                }
+            }
+        })
+        .map_err(|error| MediaError::Decode(format!("spawn audio fill worker: {error}")))?;
+    Ok(Some(PreparedTimelineAudio {
+        consumer: AudioStreamConsumer {
+            receiver,
+            control: Arc::clone(&control),
+            current: None,
+        },
+        control,
+        producer,
+    }))
 }
 
 /// Production-facing clock construction with explicit media/allocation errors.
@@ -932,19 +1440,33 @@ fn build_clock_with_state(
     cancel: &MediaCancelToken,
 ) -> Result<(Arc<dyn PlaybackClock>, Option<AudioPlayback>), MediaError> {
     let rate = default_output_rate().unwrap_or(FALLBACK_SAMPLE_RATE);
-    let mixed = mix_timeline_stereo(timeline, media, rate, cancel)?;
-    if mixed.is_empty() {
+    let start_audio_frame =
+        ((start_frame.max(0) as f64 / fps.max(1) as f64) * rate as f64).round() as u64;
+    let Some(prepared) = mix_timeline_stereo(timeline, media, rate, start_audio_frame, cancel)?
+    else {
         return Ok((Arc::new(InstantClock::new(start_frame)), None));
-    }
-
-    Ok(clock_from_mixed(
-        mixed,
+    };
+    let pos = Arc::new(AtomicU64::new(start_audio_frame));
+    let paused = Arc::new(AtomicBool::new(start_paused));
+    let clock = AudioClock {
+        pos: Arc::clone(&pos),
         rate,
         fps,
-        start_frame,
-        start_paused,
-        AudioPlayback::start,
-    ))
+        stream: Some(Arc::clone(&prepared.control)),
+    };
+    match AudioPlayback::start_stream(
+        prepared.consumer,
+        prepared.control,
+        prepared.producer,
+        pos,
+        paused,
+    ) {
+        Ok(audio) => Ok((Arc::new(clock), Some(audio))),
+        Err(error) => {
+            eprintln!("[audio] {error}; falling back to wall clock");
+            Ok((Arc::new(InstantClock::new(start_frame)), None))
+        }
+    }
 }
 
 fn clock_from_mixed<F>(
@@ -965,6 +1487,7 @@ where
         pos: pos.clone(),
         rate,
         fps,
+        stream: None,
     };
     clock.seek(start_frame); // begin playback at the current playhead
 
@@ -1024,8 +1547,20 @@ mod tests {
             audio_clip("c2", "m2", 900, 900),
         ]);
         let media = HashMap::from([
-            ("m1".to_string(), MediaInfo { path: first }),
-            ("m2".to_string(), MediaInfo { path: second }),
+            (
+                "m1".to_string(),
+                MediaInfo {
+                    path: first,
+                    straight_alpha: false,
+                },
+            ),
+            (
+                "m2".to_string(),
+                MediaInfo {
+                    path: second,
+                    straight_alpha: false,
+                },
+            ),
         ]);
         let cancel = MediaCancelToken::new();
         let worker_cancel = cancel.clone();
@@ -1036,6 +1571,7 @@ mod tests {
                     &timeline,
                     &media,
                     48_000,
+                    0,
                     &worker_cancel,
                 ))
                 .expect("publish audio prepare result");
@@ -1047,10 +1583,13 @@ mod tests {
         }
         assert_eq!(cancel.spawned_child_count(), 1);
         cancel.cancel();
-        let error = done_rx
+        let error = match done_rx
             .recv_timeout(Duration::from_secs(5))
             .expect("cancelled audio prepare must return")
-            .expect_err("cancelled audio prepare must fail");
+        {
+            Err(error) => error,
+            Ok(_) => panic!("cancelled audio prepare must fail"),
+        };
         assert!(matches!(error, MediaError::Cancelled));
         worker.join().expect("join audio prepare worker");
         assert_eq!(
@@ -1068,6 +1607,7 @@ mod tests {
             start_frame: 0,
             interleaved: vec![0.25; 12_000_000],
             gains: Vec::new(),
+            true_peak_ceiling_dbtp: None,
         };
         let (done_tx, done_rx) = mpsc::channel();
         let worker = std::thread::spawn(move || {
@@ -1092,64 +1632,115 @@ mod tests {
     }
 
     #[test]
-    fn audio_prepare_rejects_projected_mix_over_256_mib_without_allocation() {
-        let timeline = audio_timeline(vec![audio_clip("huge", "missing", 0, 30 * 60 * 12)]);
-        let media = HashMap::from([(
-            "missing".to_string(),
-            MediaInfo {
-                path: PathBuf::from("/must/not/be/decoded.wav"),
+    fn long_timeline_mix_has_constant_peak_allocation_and_matches_short_reference() {
+        let near = StereoClip {
+            start_frame: 0,
+            interleaved: vec![0.6, -0.6, 0.5, 0.5],
+            gains: Vec::new(),
+            true_peak_ceiling_dbtp: None,
+        };
+        let far = StereoClip {
+            start_frame: 48_000 * 60 * 60,
+            interleaved: vec![0.25, -0.25],
+            gains: Vec::new(),
+            true_peak_ceiling_dbtp: None,
+        };
+        let reference = mix_stereo(
+            &[StereoClip {
+                start_frame: near.start_frame,
+                interleaved: near.interleaved.clone(),
+                gains: near.gains.clone(),
+                true_peak_ceiling_dbtp: near.true_peak_ceiling_dbtp,
+            }],
+            &MediaCancelToken::new(),
+        )
+        .unwrap();
+        let mut first_window = Vec::new();
+        let mut peak_samples = 0;
+
+        mix_stereo_windows(
+            &[near, far],
+            1024,
+            &MediaCancelToken::new(),
+            |start_frame, samples| {
+                peak_samples = peak_samples.max(samples.len());
+                if start_frame == 0 {
+                    first_window.extend_from_slice(samples);
+                }
+                Ok(())
             },
-        )]);
-        let cancel = MediaCancelToken::new();
-
-        let error = mix_timeline_stereo(&timeline, &media, 48_000, &cancel)
-            .expect_err("a 12-minute stereo f32 pre-mix exceeds 256 MiB");
+        )
+        .unwrap();
 
-        assert!(error.to_string().contains("audio_buffer_too_large"));
-        assert_eq!(cancel.spawned_child_count(), 0);
+        assert_eq!(&first_window[..reference.len()], reference);
+        assert!(
+            peak_samples <= 1024 * MIX_CHANNELS,
+            "one-hour timeline must retain only one bounded mix window"
+        );
     }
 
     #[test]
-    fn audio_prepare_rejects_raw_plus_converted_peak_before_decode() {
-        let timeline = audio_timeline(vec![audio_clip("peak", "missing", 0, 30 * 60 * 5)]);
-        let media = HashMap::from([(
-            "missing".to_string(),
-            MediaInfo {
-                path: PathBuf::from("/must/not/be/decoded-for-peak.wav"),
-            },
-        )]);
-        let cancel = MediaCancelToken::new();
-
-        let error = mix_timeline_stereo(&timeline, &media, 48_000, &cancel)
-            .expect_err("raw PCM, converted f32, and output mix exceed 256 MiB together");
-
-        assert!(error.to_string().contains("audio_buffer_too_large"));
-        assert_eq!(
-            cancel.spawned_child_count(),
-            0,
-            "peak must be rejected before FFmpeg starts"
-        );
+    fn streaming_consumer_discards_pre_seek_chunks_and_reports_underrun_as_silence() {
+        let control = Arc::new(AudioStreamControl::new(0));
+        let (sender, receiver) = bounded(4);
+        sender
+            .send(Ok(AudioStreamChunk {
+                generation: 0,
+                start_frame: 0,
+                samples: vec![0.25, -0.25],
+            }))
+            .unwrap();
+        let mut consumer = AudioStreamConsumer {
+            receiver,
+            control: Arc::clone(&control),
+            current: None,
+        };
+        assert_eq!(consumer.sample_frame(0), (0.25, -0.25));
+
+        control.request_seek(10);
+        sender
+            .send(Ok(AudioStreamChunk {
+                generation: 0,
+                start_frame: 1,
+                samples: vec![0.5, 0.5],
+            }))
+            .unwrap();
+        sender
+            .send(Ok(AudioStreamChunk {
+                generation: 1,
+                start_frame: 10,
+                samples: vec![0.75, -0.75],
+            }))
+            .unwrap();
+        assert_eq!(consumer.sample_frame(10), (0.75, -0.75));
+        assert_eq!(consumer.sample_frame(99), (0.0, 0.0));
+        assert_eq!(control.underruns.load(Ordering::Relaxed), 1);
     }
 
     #[test]
-    fn speed_and_gain_actual_stage_peak_is_rejected_before_decode() {
-        let mut clip = audio_clip("expanded", "missing", 0, 73 * 30);
-        clip.speed = 4.0;
-        clip.volume = 0.5;
-        let timeline = audio_timeline(vec![clip]);
-        let media = HashMap::from([(
-            "missing".to_string(),
-            MediaInfo {
-                path: PathBuf::from("/must/not-decode-speed-gain-peak.wav"),
-            },
-        )]);
-        let cancel = MediaCancelToken::new();
+    fn paused_stream_drain_retains_the_next_current_generation_chunk() {
+        let control = Arc::new(AudioStreamControl::new(0));
+        let (sender, receiver) = bounded(4);
+        for (start_frame, sample) in [(0, 0.25), (1, 0.75)] {
+            sender
+                .send(Ok(AudioStreamChunk {
+                    generation: 0,
+                    start_frame,
+                    samples: vec![sample, -sample],
+                }))
+                .unwrap();
+        }
+        let mut consumer = AudioStreamConsumer {
+            receiver,
+            control,
+            current: None,
+        };
 
-        let error = mix_timeline_stereo(&timeline, &media, 48_000, &cancel)
-            .expect_err("retained decoded, gains, and actual mix extent exceed 256 MiB");
+        consumer.discard_stale();
+        consumer.discard_stale();
 
-        assert!(error.to_string().contains("audio_buffer_too_large"));
-        assert_eq!(cancel.spawned_child_count(), 0);
+        assert_eq!(consumer.sample_frame(0), (0.25, -0.25));
+        assert_eq!(consumer.sample_frame(1), (0.75, -0.75));
     }
 
     #[test]
@@ -1159,11 +1750,15 @@ mod tests {
             "missing".to_string(),
             MediaInfo {
                 path: PathBuf::from("/definitely/missing/audio.wav"),
+                straight_alpha: false,
             },
         )]);
 
-        let error = mix_timeline_stereo(&timeline, &media, 48_000, &MediaCancelToken::new())
-            .expect_err("decode failure must propagate instead of producing an empty mix");
+        let error =
+            match mix_timeline_stereo(&timeline, &media, 48_000, 0, &MediaCancelToken::new()) {
+                Err(error) => error,
+                Ok(_) => panic!("decode failure must propagate instead of producing an empty mix"),
+            };
 
         assert!(!matches!(error, MediaError::Cancelled));
     }
@@ -1175,6 +1770,7 @@ mod tests {
             "missing".to_string(),
             MediaInfo {
                 path: PathBuf::from("/definitely/missing/try-build-clock.wav"),
+                straight_alpha: false,
             },
         )]);
 
@@ -1186,24 +1782,6 @@ mod tests {
         assert!(!matches!(error, MediaError::Cancelled));
     }
 
-    #[test]
-    fn try_build_clock_propagates_over_cap_error_without_panic() {
-        let timeline = audio_timeline(vec![audio_clip("huge", "missing", 0, 30 * 60 * 12)]);
-        let media = HashMap::from([(
-            "missing".to_string(),
-            MediaInfo {
-                path: PathBuf::from("/must/not-decode-over-cap-clock.wav"),
-            },
-        )]);
-
-        let error = match try_build_clock(&timeline, &media, 30, 0) {
-            Err(error) => error,
-            Ok(_) => panic!("production clock entry must propagate the preflight error"),
-        };
-
-        assert!(error.to_string().contains("audio_buffer_too_large"));
-    }
-
     #[cfg(target_os = "windows")]
     #[test]
     fn default_output_rate_survives_sequential_short_lived_callers() {
@@ -1358,6 +1936,7 @@ mod tests {
             pos: Arc::new(AtomicU64::new(0)),
             rate: 48_000,
             fps: 30,
+            stream: None,
         };
         // seek(30) → 30 frames = 1s = 48000 output frames → frame()==30.
         clock.seek(30);
@@ -1450,6 +2029,7 @@ mod tests {
             pos: Arc::new(AtomicU64::new(0)),
             rate: 48_000,
             fps: 30,
+            stream: None,
         };
         // 1599 frames @ 48k, 30fps = 0.999 video frame → truncates to 0.
         clock.pos.store(1_599, Ordering::Relaxed);
@@ -1468,6 +2048,7 @@ mod tests {
             pos: Arc::new(AtomicU64::new(0)),
             rate: 44_100,
             fps: 24,
+            stream: None,
         };
         for f in [1, 7, 23, 100, 511] {
             clock.seek(f);
@@ -1475,6 +2056,17 @@ mod tests {
         }
     }
 
+    #[test]
+    fn streaming_timeline_extent_rounds_like_the_audio_clock_seek() {
+        let mut timeline = Timeline::new();
+        timeline.fps = 24;
+        let mut track = Track::new("v1", ClipType::Video);
+        track.clips.push(audio_clip("odd", "source", 0, 7));
+        timeline.tracks.push(track);
+
+        assert_eq!(timeline_audio_frames(&timeline, 44_100).unwrap(), 12_863);
+    }
+
     #[test]
     fn clip_source_window_uses_timeline_fps() {
         let mut clip = Clip::new("c1", "asset-1", 0, 60);
@@ -1501,9 +2093,9 @@ mod tests {
         let timeline = Timeline::new();
         let media: HashMap<String, MediaInfo> = HashMap::new();
         assert!(
-            mix_timeline_stereo(&timeline, &media, 48_000, &MediaCancelToken::new())
+            mix_timeline_stereo(&timeline, &media, 48_000, 0, &MediaCancelToken::new())
                 .expect("empty timeline")
-                .is_empty()
+                .is_none()
         );
     }
 
@@ -1515,11 +2107,13 @@ mod tests {
             start_frame: 0,
             interleaved: vec![0.6, -0.6, 0.5, 0.5],
             gains: Vec::new(),
+            true_peak_ceiling_dbtp: None,
         };
         let b = StereoClip {
             start_frame: 1,
             interleaved: vec![0.6, 0.6],
             gains: Vec::new(),
+            true_peak_ceiling_dbtp: None,
         };
         let out = mix_stereo(&[a, b], &MediaCancelToken::new()).expect("mix");
         assert_eq!(out.len(), 4); // 2 frames × 2 channels
@@ -1537,11 +2131,43 @@ mod tests {
             start_frame: 0,
             interleaved: vec![1.0, 1.0, 1.0, 1.0],
             gains: vec![0.5, 0.25],
+            true_peak_ceiling_dbtp: None,
         };
         let out = mix_stereo(&[c], &MediaCancelToken::new()).expect("mix");
         assert_eq!(out, vec![0.5, 0.5, 0.25, 0.25]);
     }
 
+    #[test]
+    fn mix_stereo_enforces_normalized_true_peak_with_codec_margin() {
+        let clip = StereoClip {
+            start_frame: 0,
+            interleaved: vec![1.0, -1.0],
+            gains: Vec::new(),
+            true_peak_ceiling_dbtp: Some(-1.0),
+        };
+        let out = mix_stereo(&[clip], &MediaCancelToken::new()).expect("mix");
+        let expected = 10.0_f32.powf(-3.0 / 20.0);
+        assert!((out[0] - expected).abs() < 1e-6);
+        assert!((out[1] + expected).abs() < 1e-6);
+    }
+
+    #[test]
+    fn denoise_preview_uses_shared_processing_owner() {
+        let config = opentake_domain::AudioDenoise {
+            mode: opentake_domain::DenoiseMode::Adaptive,
+            strength: 0.75,
+            preview_enabled: true,
+        };
+        let input = vec![0.2, -0.1, 0.15, -0.05, 0.1, 0.0, 0.05, 0.05];
+        let cancel = MediaCancelToken::new();
+        let preview = apply_preview_denoise(&input, 2, 48_000, Some(config), &cancel)
+            .expect("preview denoise");
+        let shared =
+            opentake_media::analysis::denoise_interleaved(&input, 2, 48_000, config, &cancel, None)
+                .expect("shared denoise");
+        assert_eq!(preview, shared);
+    }
+
     #[test]
     fn write_frame_maps_to_device_channels() {
         // Mono device: average L+R.
diff --git a/src-tauri/src/playback/commands.rs b/src-tauri/src/playback/commands.rs
index 973250f9..43b8c985 100644
--- a/src-tauri/src/playback/commands.rs
+++ b/src-tauri/src/playback/commands.rs
@@ -24,7 +24,7 @@ use super::audio::{
 use super::engine::{
     BoundedReaper, FrameSink, PlaybackClock, PlaybackEngine, PlayheadEmitter, ReapPermit,
 };
-use super::project::{project_media, project_text};
+use super::project::{project_media_with_proxies, project_text};
 use super::session::{
     PlaybackCommandError, PlaybackIdentity, ProjectTransition, SessionControl, SessionRegistry,
     StartDecision, StartTicket,
@@ -564,11 +564,24 @@ pub async fn playback_start(
 
     // Snapshot the session synchronously — no managed-state guard is held across
     // the await below (Tauri async commands require a Send future).
-    let (timeline, sizes, media, text, render_size, fps, sink, emitter, publication, server) = {
+    let (
+        timeline,
+        sizes,
+        media,
+        text,
+        render_size,
+        fps,
+        sink,
+        emitter,
+        publication,
+        server,
+        project_dir,
+    ) = {
         let timeline = snapshot.timeline;
         let manifest = snapshot.media;
         let project_dir = snapshot.project_dir;
-        let (sizes, media) = project_media(&manifest, &project_dir);
+        let prefer_proxy = app.state::<crate::media::MediaProxyState>().enabled();
+        let (sizes, media) = project_media_with_proxies(&manifest, &project_dir, prefer_proxy);
         let text = project_text(&timeline);
         let render_size =
             playback_render_size(timeline.width, timeline.height, PLAYBACK_PREVIEW_CAP);
@@ -593,6 +606,7 @@ pub async fn playback_start(
             emitter,
             publication,
             server,
+            project_dir,
         )
     };
 
@@ -637,7 +651,7 @@ pub async fn playback_start(
 
     let ready_cancel = cancel.clone();
     let engine = match spawn_ready_off_executor(move || {
-        PlaybackEngine::spawn_ready_cancellable(
+        PlaybackEngine::spawn_ready_cancellable_with_project(
             timeline,
             media,
             text,
@@ -648,6 +662,7 @@ pub async fn playback_start(
             emitter,
             start_at,
             ready_cancel,
+            project_dir,
         )
     })
     .await
diff --git a/src-tauri/src/playback/engine.rs b/src-tauri/src/playback/engine.rs
index 3121e580..4dc2f8d6 100644
--- a/src-tauri/src/playback/engine.rs
+++ b/src-tauri/src/playback/engine.rs
@@ -14,7 +14,8 @@
 //! master clock, the MJPEG sink, and the Tauri event emitter without touching the
 //! loop.
 
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
+use std::path::PathBuf;
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::mpsc::{self, TryRecvError};
 use std::sync::{Arc, Mutex};
@@ -24,7 +25,7 @@ use std::time::{Duration, Instant};
 use opentake_domain::Timeline;
 use opentake_media::MediaCancelToken;
 use opentake_render::{
-    build_render_plan, Compositor, DecodedFrame, RenderDevice, RenderPlan, RenderSize,
+    try_build_render_plan, Compositor, DecodedFrame, RenderDevice, RenderPlan, RenderSize,
 };
 
 use super::project::{ManifestMetrics, MediaInfo, TextInfo};
@@ -300,6 +301,7 @@ impl RenderLoop {
             sizes,
             render_size,
             MediaCancelToken::new(),
+            None,
         )
     }
 
@@ -310,17 +312,32 @@ impl RenderLoop {
         sizes: HashMap<String, (u32, u32)>,
         render_size: RenderSize,
         cancel: MediaCancelToken,
+        project_dir: Option<PathBuf>,
     ) -> Result<Self, String> {
         let dev = RenderDevice::try_new().map_err(|e| format!("no GPU device: {e}"))?;
         let compositor = Compositor::new(&dev.device);
-        let metrics = ManifestMetrics { sizes };
-        let plan = build_render_plan(&timeline, render_size, &metrics);
-        let state = PlaybackResolverState::new(
+        let straight_alpha = media
+            .iter()
+            .filter(|(_, info)| info.straight_alpha)
+            .map(|(id, _)| id.clone())
+            .collect::<HashSet<_>>();
+        let metrics = ManifestMetrics {
+            sizes,
+            straight_alpha,
+        };
+        let plan = try_build_render_plan(&timeline, render_size, &metrics)
+            .map_err(|error| format!("invalid timeline graph: {error}"))?;
+        let project_root = project_dir
+            .map(opentake_project::ProjectRoot::open)
+            .transpose()
+            .map_err(|error| format!("open project LUT storage: {error}"))?;
+        let state = PlaybackResolverState::new_with_project_root(
             media,
             text,
             plan.fps,
             (render_size.width, render_size.height),
             cancel,
+            project_root,
         );
         Ok(RenderLoop {
             device: dev.device,
@@ -347,7 +364,8 @@ impl RenderLoop {
         let frame_plan = self.plan.frame(&self.timeline, target);
         let mut resolver = StreamingResolver::new(&self.device, &self.queue, &mut self.state);
         resolver.sync_active(&frame_plan)?;
-        self.compositor
+        let composite = self
+            .compositor
             .render_to_rgba(
                 &self.device,
                 &self.queue,
@@ -355,7 +373,14 @@ impl RenderLoop {
                 &frame_plan,
                 &mut resolver,
             )
-            .map_err(|e| format!("composite render failed at frame {target}: {e}"))
+            .map_err(|e| format!("composite render failed at frame {target}: {e}"));
+        drop(resolver);
+        if let Some(error) = self.state.take_materialization_error() {
+            return Err(format!(
+                "Lottie materialization failed at frame {target}: {error}"
+            ));
+        }
+        composite
     }
 
     /// Restart all decode streams (used on seek): the next `render_frame` re-spawns
@@ -400,6 +425,7 @@ impl PlaybackEngine {
             emitter,
             None,
             None,
+            None,
             MediaCancelToken::new(),
         )
     }
@@ -451,6 +477,35 @@ impl PlaybackEngine {
         emitter: Arc<dyn PlayheadEmitter>,
         start_frame: i32,
         cancel: MediaCancelToken,
+    ) -> Result<Self, String> {
+        Self::spawn_ready_cancellable_with_project(
+            timeline,
+            media,
+            text,
+            sizes,
+            render_size,
+            clock,
+            sink,
+            emitter,
+            start_frame,
+            cancel,
+            None,
+        )
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    pub fn spawn_ready_cancellable_with_project(
+        timeline: Timeline,
+        media: HashMap<String, MediaInfo>,
+        text: HashMap<String, TextInfo>,
+        sizes: HashMap<String, (u32, u32)>,
+        render_size: RenderSize,
+        clock: Arc<dyn PlaybackClock>,
+        sink: Arc<dyn FrameSink>,
+        emitter: Arc<dyn PlayheadEmitter>,
+        start_frame: i32,
+        cancel: MediaCancelToken,
+        project_dir: Option<PathBuf>,
     ) -> Result<Self, String> {
         let (ready_tx, ready_rx) = mpsc::channel();
         let engine = Self::spawn_internal(
@@ -462,6 +517,7 @@ impl PlaybackEngine {
             clock,
             sink,
             emitter,
+            project_dir,
             Some(start_frame.max(0)),
             Some(ready_tx),
             cancel,
@@ -489,6 +545,7 @@ impl PlaybackEngine {
         clock: Arc<dyn PlaybackClock>,
         sink: Arc<dyn FrameSink>,
         emitter: Arc<dyn PlayheadEmitter>,
+        project_dir: Option<PathBuf>,
         initial_frame: Option<i32>,
         startup: Option<mpsc::Sender<Result<(), String>>>,
         cancel: MediaCancelToken,
@@ -509,6 +566,7 @@ impl PlaybackEngine {
                     clock,
                     sink,
                     emitter,
+                    project_dir,
                     rx,
                     render_seek_mailbox,
                     initial_frame,
@@ -656,23 +714,31 @@ fn run_render_thread(
     clock: Arc<dyn PlaybackClock>,
     sink: Arc<dyn FrameSink>,
     emitter: Arc<dyn PlayheadEmitter>,
+    project_dir: Option<PathBuf>,
     rx: mpsc::Receiver<PlaybackCmd>,
     seek_mailbox: Arc<SeekMailbox>,
     initial_frame: Option<i32>,
     mut startup: Option<mpsc::Sender<Result<(), String>>>,
     cancel: MediaCancelToken,
 ) {
-    let mut render_loop =
-        match RenderLoop::new_with_cancel(timeline, media, text, sizes, render_size, cancel) {
-            Ok(rl) => rl,
-            Err(e) => {
-                if let Some(tx) = startup.take() {
-                    let _ = tx.send(Err(e.clone()));
-                }
-                eprintln!("[playback] {e}");
-                return;
+    let mut render_loop = match RenderLoop::new_with_cancel(
+        timeline,
+        media,
+        text,
+        sizes,
+        render_size,
+        cancel,
+        project_dir,
+    ) {
+        Ok(rl) => rl,
+        Err(e) => {
+            if let Some(tx) = startup.take() {
+                let _ = tx.send(Err(e.clone()));
             }
-        };
+            eprintln!("[playback] {e}");
+            return;
+        }
+    };
     let total = render_loop.total_frames();
     let fps = render_loop.fps();
     if total <= 0 {
diff --git a/src-tauri/src/playback/project.rs b/src-tauri/src/playback/project.rs
index 4b37a93f..e73bbbca 100644
--- a/src-tauri/src/playback/project.rs
+++ b/src-tauri/src/playback/project.rs
@@ -10,7 +10,7 @@
 //! can hoist the single shared projection into one `pub(crate)` helper once all
 //! three paths are stable (tracked as a follow-up; see the export.rs header note).
 
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 use std::path::PathBuf;
 
 use opentake_domain::{ClipType, MediaManifest, MediaSource, TextStyle, Timeline};
@@ -22,6 +22,7 @@ pub struct MediaInfo {
     /// Absolute, decode-ready path (project-relative entries already joined to
     /// the bundle dir).
     pub path: PathBuf,
+    pub straight_alpha: bool,
 }
 
 /// A text clip projected from the timeline, keyed by clip id. The box's width /
@@ -39,12 +40,17 @@ pub struct TextInfo {
 /// auto-rotates on decode in this cut), mirroring the preview/export adapters.
 pub struct ManifestMetrics {
     pub sizes: HashMap<String, (u32, u32)>,
+    pub straight_alpha: HashSet<String>,
 }
 
 impl SourceMetrics for ManifestMetrics {
     fn natural_size(&self, media_ref: &str) -> Option<(u32, u32)> {
         self.sizes.get(media_ref).copied()
     }
+
+    fn needs_premultiply(&self, media_ref: &str) -> bool {
+        self.straight_alpha.contains(media_ref)
+    }
 }
 
 /// Project the timeline's text clips (content + style + box) into the per-clip
@@ -53,23 +59,30 @@ impl SourceMetrics for ManifestMetrics {
 /// `export::project_text`'s identical projection.
 pub fn project_text(timeline: &Timeline) -> HashMap<String, TextInfo> {
     let mut text: HashMap<String, TextInfo> = HashMap::new();
-    for track in &timeline.tracks {
-        for clip in &track.clips {
-            if clip.media_type != ClipType::Text {
-                continue;
+    for candidate in std::iter::once(timeline).chain(
+        timeline
+            .nested_sequences
+            .iter()
+            .map(|sequence| &sequence.timeline),
+    ) {
+        for track in &candidate.tracks {
+            for clip in &track.clips {
+                if clip.media_type != ClipType::Text {
+                    continue;
+                }
+                let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
+                    continue;
+                };
+                let tl = clip.transform.top_left();
+                text.insert(
+                    clip.id.clone(),
+                    TextInfo {
+                        content: content.clone(),
+                        style: style.clone(),
+                        box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
+                    },
+                );
             }
-            let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
-                continue;
-            };
-            let tl = clip.transform.top_left();
-            text.insert(
-                clip.id.clone(),
-                TextInfo {
-                    content: content.clone(),
-                    style: style.clone(),
-                    box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
-                },
-            );
         }
     }
     text
@@ -82,23 +95,61 @@ pub fn project_text(timeline: &Timeline) -> HashMap<String, TextInfo> {
 pub fn project_media(
     manifest: &MediaManifest,
     project_dir: &Option<PathBuf>,
+) -> (HashMap<String, (u32, u32)>, HashMap<String, MediaInfo>) {
+    project_media_with_proxies(manifest, project_dir, false)
+}
+
+/// Proxy-aware playback projection. A proxy is selected only when the app
+/// preference is enabled, the project-local path is lexically confined to
+/// `media/proxies/`, the file exists, and the current source bytes still match
+/// the digest recorded when the proxy was created. Every failure falls back to
+/// the original source; export never calls this function.
+pub fn project_media_with_proxies(
+    manifest: &MediaManifest,
+    project_dir: &Option<PathBuf>,
+    prefer_proxy: bool,
 ) -> (HashMap<String, (u32, u32)>, HashMap<String, MediaInfo>) {
     let mut sizes: HashMap<String, (u32, u32)> = HashMap::new();
     let mut media: HashMap<String, MediaInfo> = HashMap::new();
     for entry in &manifest.entries {
-        let path = match &entry.source {
+        let source_path = match &entry.source {
             MediaSource::External { absolute_path } => PathBuf::from(absolute_path),
             MediaSource::Project { relative_path } => match project_dir {
                 Some(base) => base.join(relative_path),
                 None => continue,
             },
         };
+        let path = if prefer_proxy {
+            entry
+                .proxy
+                .as_ref()
+                .and_then(|proxy| {
+                    let base = project_dir.as_ref()?;
+                    let candidate =
+                        crate::media::trusted_project_proxy_path(base, &proxy.relative_path)?;
+                    if opentake_media::file_sha256(&source_path).ok().as_deref()
+                        != Some(proxy.source_sha256.as_str())
+                    {
+                        return None;
+                    }
+                    Some(candidate)
+                })
+                .unwrap_or(source_path)
+        } else {
+            source_path
+        };
         if let (Some(w), Some(h)) = (entry.source_width, entry.source_height) {
             if w > 0 && h > 0 {
                 sizes.insert(entry.id.clone(), (w as u32, h as u32));
             }
         }
-        media.insert(entry.id.clone(), MediaInfo { path });
+        media.insert(
+            entry.id.clone(),
+            MediaInfo {
+                path,
+                straight_alpha: entry.carries_straight_alpha(),
+            },
+        );
     }
     (sizes, media)
 }
@@ -106,7 +157,7 @@ pub fn project_media(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use opentake_domain::{Clip, MediaManifestEntry, Timeline, Track};
+    use opentake_domain::{Clip, MediaManifestEntry, MediaProxy, Timeline, Track};
 
     fn entry(id: &str, source: MediaSource, size: Option<(i32, i32)>) -> MediaManifestEntry {
         MediaManifestEntry {
@@ -120,6 +171,8 @@ mod tests {
             source_height: size.map(|(_, h)| h),
             source_fps: None,
             has_audio: None,
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -197,6 +250,42 @@ mod tests {
         assert!(sizes.is_empty());
     }
 
+    #[test]
+    fn proxy_projection_requires_enabled_present_and_matching_source_digest() {
+        let temp = tempfile::tempdir().unwrap();
+        let source = temp.path().join("source.mp4");
+        let proxy = temp.path().join("media/proxies/proxy.mp4");
+        std::fs::create_dir_all(proxy.parent().unwrap()).unwrap();
+        std::fs::write(&source, b"source-v1").unwrap();
+        std::fs::write(&proxy, b"proxy-v1").unwrap();
+
+        let mut manifest = MediaManifest::new();
+        let mut item = entry(
+            "asset",
+            MediaSource::External {
+                absolute_path: source.to_string_lossy().into_owned(),
+            },
+            Some((1920, 1080)),
+        );
+        item.proxy = Some(MediaProxy {
+            relative_path: "media/proxies/proxy.mp4".into(),
+            source_sha256: opentake_media::file_sha256(&source).unwrap(),
+            width: 640,
+            height: 360,
+        });
+        manifest.entries.push(item);
+        let project_dir = Some(temp.path().to_path_buf());
+
+        let (_, original) = project_media_with_proxies(&manifest, &project_dir, false);
+        assert_eq!(original["asset"].path, source);
+        let (_, proxied) = project_media_with_proxies(&manifest, &project_dir, true);
+        assert_eq!(proxied["asset"].path, proxy);
+
+        std::fs::write(&source, b"source-v2").unwrap();
+        let (_, stale) = project_media_with_proxies(&manifest, &project_dir, true);
+        assert_eq!(stale["asset"].path, source);
+    }
+
     #[test]
     fn project_text_collects_text_clips_only() {
         let mut tl = Timeline::new();
diff --git a/src-tauri/src/playback/resolver.rs b/src-tauri/src/playback/resolver.rs
index 928e4bb1..0163b1bb 100644
--- a/src-tauri/src/playback/resolver.rs
+++ b/src-tauri/src/playback/resolver.rs
@@ -23,23 +23,28 @@
 //! per-frame lookup keyed `v:{media_ref}:{source_frame}`. Multiple clips may
 //! share that key; when one decoder is behind, the exact-frame candidate wins
 //! over its stale fallback regardless of draw order. `resolve()` then degrades
-//! to a table lookup for video, and the usual static cache for image / text.
+//! to a table lookup for video, the static cache for image / text, and the
+//! content-hash + internal-frame LRU for Lottie.
 
 use std::collections::{HashMap, HashSet};
 use std::rc::Rc;
 use std::sync::mpsc::TryRecvError;
 
+use opentake_domain::LutReference;
 use opentake_media::decode::{
     spawn_video_stream, StreamVideoFrame, VideoStream, VideoStreamRequest,
 };
 use opentake_media::{decode_frame_at_cancellable, FrameRequest, MediaCancelToken, MediaError};
+use opentake_project::ProjectRoot;
 use opentake_render::gpu::texture::upload_rgba;
 use opentake_render::wgpu;
 use opentake_render::{
-    CosmicTextRasterizer, DecodedFrame, FramePlan, GpuTexture, TextRasterRequest, TextRasterizer,
-    TextureCache, TextureResolver, TextureSource,
+    CosmicTextRasterizer, DecodedFrame, FramePlan, GpuLutTexture, GpuTexture, TextRasterRequest,
+    TextRasterizer, TextureCache, TextureResolver, TextureSource,
 };
 
+use crate::render::LottieMaterializer;
+
 use super::project::{MediaInfo, TextInfo};
 
 /// Per-frame texture cache size for static (image / text) layers. Video frames
@@ -201,8 +206,9 @@ pub struct PlaybackResolverState {
     /// Active video streams, keyed by **clip id** (NOT media_ref): a split clip
     /// or a reused asset needs an independent decode position.
     streams: HashMap<String, ClipStream>,
-    /// Image + text textures (persistent across frames).
+    /// Image, text, and bounded Lottie-frame textures (persistent across frames).
     static_cache: TextureCache,
+    lottie: LottieMaterializer,
     text_rasterizer: CosmicTextRasterizer,
     media: HashMap<String, MediaInfo>,
     text: HashMap<String, TextInfo>,
@@ -210,6 +216,9 @@ pub struct PlaybackResolverState {
     /// Decode / raster downscale box (matches the playback render size).
     render_box: (u32, u32),
     cancel: MediaCancelToken,
+    project_root: Option<ProjectRoot>,
+    lut_cache: HashMap<String, Rc<GpuLutTexture>>,
+    materialization_error: Option<String>,
 }
 
 impl PlaybackResolverState {
@@ -219,16 +228,31 @@ impl PlaybackResolverState {
         timeline_fps: i32,
         render_box: (u32, u32),
         cancel: MediaCancelToken,
+    ) -> Self {
+        Self::new_with_project_root(media, text, timeline_fps, render_box, cancel, None)
+    }
+
+    pub fn new_with_project_root(
+        media: HashMap<String, MediaInfo>,
+        text: HashMap<String, TextInfo>,
+        timeline_fps: i32,
+        render_box: (u32, u32),
+        cancel: MediaCancelToken,
+        project_root: Option<ProjectRoot>,
     ) -> Self {
         PlaybackResolverState {
             streams: HashMap::new(),
             static_cache: TextureCache::new(STATIC_CACHE_CAP),
+            lottie: LottieMaterializer::new(),
             text_rasterizer: CosmicTextRasterizer::new(),
             media,
             text,
             timeline_fps,
             render_box,
             cancel,
+            project_root,
+            lut_cache: HashMap::new(),
+            materialization_error: None,
         }
     }
 
@@ -241,6 +265,13 @@ impl PlaybackResolverState {
             cs.stream.request_stop();
         }
     }
+
+    /// Take the first materialization failure recorded during the current
+    /// frame. The render loop turns this into an explicit playback error instead
+    /// of silently dropping the Lottie layer.
+    pub fn take_materialization_error(&mut self) -> Option<String> {
+        self.materialization_error.take()
+    }
 }
 
 /// One video layer's decode target for a frame: which clip, which asset, and the
@@ -390,11 +421,12 @@ impl<'d, 's> StreamingResolver<'d, 's> {
     /// Decode (once) and cache a static image layer, mirroring the preview
     /// resolver's image path.
     fn resolve_image(&mut self, media_ref: &str) -> Option<Rc<GpuTexture>> {
-        let key = format!("i:{media_ref}");
+        let info = self.state.media.get(media_ref)?;
+        let content_hash = opentake_media::file_sha256(&info.path).ok()?;
+        let key = format!("i:{content_hash}");
         if let Some(tex) = self.state.static_cache.get(&key) {
             return Some(tex);
         }
-        let info = self.state.media.get(media_ref)?;
         let req = FrameRequest {
             time_secs: 0.0,
             max_size: self.state.render_box,
@@ -454,10 +486,48 @@ impl TextureResolver for StreamingResolver<'_, '_> {
                 .map(|candidate| candidate.texture.clone()),
             TextureSource::Image { media_ref } => self.resolve_image(media_ref),
             TextureSource::Text { clip_id } => self.resolve_text(clip_id),
-            // Lottie bake wiring lands with #65 (PR3); skipped for now, matching
-            // the preview resolver (`render.rs`).
-            TextureSource::Lottie { .. } => None,
+            TextureSource::Lottie { media_ref } => {
+                let info = self.state.media.get(media_ref)?;
+                match self.state.lottie.resolve(
+                    self.device,
+                    self.queue,
+                    &mut self.state.static_cache,
+                    &info.path,
+                    source_frame,
+                    self.state.render_box,
+                    "playback-lottie",
+                ) {
+                    Ok(texture) => Some(texture),
+                    Err(error) => {
+                        eprintln!("[playback] {error}");
+                        self.state.materialization_error = Some(error);
+                        None
+                    }
+                }
+            }
+        }
+    }
+
+    fn resolve_lut(
+        &mut self,
+        reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, opentake_render::RenderError> {
+        if let Some(cached) = self.state.lut_cache.get(&reference.id) {
+            return Ok(Some(cached.clone()));
         }
+        let resolved = crate::lut::resolve_project_lut(
+            self.state.project_root.as_ref(),
+            reference,
+            self.device,
+            self.queue,
+            "playback-lut",
+        )?;
+        if let Some(texture) = &resolved {
+            self.state
+                .lut_cache
+                .insert(reference.id.clone(), texture.clone());
+        }
+        Ok(resolved)
     }
 }
 
@@ -465,6 +535,239 @@ impl TextureResolver for StreamingResolver<'_, '_> {
 mod tests {
     use super::*;
     use opentake_media::RgbaFrame;
+    use opentake_render::plan::LayerDraw;
+    use opentake_render::{Compositor, FramePlan, RenderDevice, RenderSize};
+
+    fn lottie_fixture(first: &str, second: &str) -> String {
+        format!(
+            r##"{{
+  "v":"5.5.2","fr":2,"ip":0,"op":2,"w":16,"h":16,"ddd":0,"assets":[],
+  "layers":[
+    {{"ddd":0,"ind":1,"ty":4,"nm":"first",
+      "ks":{{"o":{{"a":0,"k":100}},"r":{{"a":0,"k":0}},"p":{{"a":0,"k":[8,8,0]}},
+             "a":{{"a":0,"k":[8,8,0]}},"s":{{"a":0,"k":[100,100,100]}}}},
+      "shapes":[
+        {{"ty":"rc","d":1,"s":{{"a":0,"k":[16,16]}},"p":{{"a":0,"k":[8,8]}},"r":{{"a":0,"k":0}}}},
+        {{"ty":"fl","c":{{"a":0,"k":{first}}},"o":{{"a":0,"k":100}},"r":1}}
+      ],
+      "ao":0,"ip":0,"op":1,"st":0,"bm":0}},
+    {{"ddd":0,"ind":2,"ty":4,"nm":"second",
+      "ks":{{"o":{{"a":0,"k":100}},"r":{{"a":0,"k":0}},"p":{{"a":0,"k":[8,8,0]}},
+             "a":{{"a":0,"k":[8,8,0]}},"s":{{"a":0,"k":[100,100,100]}}}},
+      "shapes":[
+        {{"ty":"rc","d":1,"s":{{"a":0,"k":[16,16]}},"p":{{"a":0,"k":[8,8]}},"r":{{"a":0,"k":0}}}},
+        {{"ty":"fl","c":{{"a":0,"k":{second}}},"o":{{"a":0,"k":100}},"r":1}}
+      ],
+      "ao":0,"ip":1,"op":2,"st":0,"bm":0}}
+  ]
+}}"##
+        )
+    }
+
+    fn composite_texture(
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        texture: Rc<GpuTexture>,
+    ) -> DecodedFrame {
+        struct FixedResolver(Rc<GpuTexture>);
+        impl TextureResolver for FixedResolver {
+            fn resolve(
+                &mut self,
+                _source: &TextureSource,
+                _source_frame: i64,
+            ) -> Option<Rc<GpuTexture>> {
+                Some(self.0.clone())
+            }
+        }
+
+        let source = TextureSource::Lottie {
+            media_ref: "fixture".into(),
+        };
+        let draw = LayerDraw {
+            source: &source,
+            source_frame: 0,
+            affine: [1.0, 0.0, 0.0, 1.0, 0.0, 0.0],
+            nat_size: (16.0, 16.0),
+            crop_uv: (0.0, 0.0, 1.0, 1.0),
+            opacity: 1.0,
+            needs_premultiply: false,
+            clip_id: "fixture-clip",
+            color_grade: None,
+            lut: None,
+            chroma_key: None,
+            masks: &[],
+            effects: &[],
+        };
+        let plan = FramePlan {
+            clear_rgba: [0.0, 0.0, 0.0, 1.0],
+            draws: vec![draw],
+        };
+        Compositor::new(device)
+            .render_to_rgba(
+                device,
+                queue,
+                RenderSize::new(16, 16),
+                &plan,
+                &mut FixedResolver(texture),
+            )
+            .expect("composite Lottie texture")
+    }
+
+    #[test]
+    fn lottie_cache_lifecycle_frame_modulo_and_preview_export_parity() {
+        let Ok(dev) = RenderDevice::try_new() else {
+            return;
+        };
+        let temp = tempfile::tempdir().expect("temp Lottie fixture");
+        let path = temp.path().join("two-frame.json");
+        std::fs::write(&path, lottie_fixture("[1,0,0,1]", "[0,1,0,1]"))
+            .expect("write Lottie fixture");
+
+        let mut preview = crate::render::LottieMaterializer::new();
+        let mut preview_cache = TextureCache::new(8);
+        let first = preview
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut preview_cache,
+                &path,
+                0,
+                (16, 16),
+                "preview-lottie",
+            )
+            .expect("preview frame zero");
+        let second = preview
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut preview_cache,
+                &path,
+                1,
+                (16, 16),
+                "preview-lottie",
+            )
+            .expect("preview frame one");
+        let wrapped = preview
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut preview_cache,
+                &path,
+                2,
+                (16, 16),
+                "preview-lottie",
+            )
+            .expect("preview wrapped frame");
+        assert!(Rc::ptr_eq(&first, &wrapped), "frame 2 must wrap to frame 0");
+        assert!(!Rc::ptr_eq(&first, &second));
+
+        let first_pixels = composite_texture(&dev.device, &dev.queue, first.clone());
+        let second_pixels = composite_texture(&dev.device, &dev.queue, second);
+        let first_center = &first_pixels.rgba[(8 * 16 + 8) * 4..][..4];
+        let second_center = &second_pixels.rgba[(8 * 16 + 8) * 4..][..4];
+        assert!(
+            first_center[0] > 200 && first_center[1] < 30,
+            "{first_center:?}"
+        );
+        assert!(
+            second_center[1] > 200 && second_center[0] < 30,
+            "{second_center:?}"
+        );
+
+        // Export owns an independent materializer/cache on the same source, but
+        // must produce byte-identical pixels for the same internal frame.
+        let mut export = crate::render::LottieMaterializer::new();
+        let mut export_cache = TextureCache::new(8);
+        let export_first = export
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut export_cache,
+                &path,
+                0,
+                (16, 16),
+                "export-lottie",
+            )
+            .expect("export frame zero");
+        assert_eq!(
+            first_pixels,
+            composite_texture(&dev.device, &dev.queue, export_first)
+        );
+
+        // Recreating the device-owned lifecycle drops GPU handles while
+        // retaining deterministic output on the next materialization.
+        let mut rebuilt = crate::render::LottieMaterializer::new();
+        let mut rebuilt_cache = TextureCache::new(8);
+        let rebuilt_first = rebuilt
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut rebuilt_cache,
+                &path,
+                0,
+                (16, 16),
+                "rebuilt-lottie",
+            )
+            .expect("rebuilt frame zero");
+        assert!(!Rc::ptr_eq(&first, &rebuilt_first));
+        assert_eq!(
+            first_pixels,
+            composite_texture(&dev.device, &dev.queue, rebuilt_first)
+        );
+
+        // Same path, changed bytes: the content hash must invalidate the old
+        // texture rather than reusing a stale media-ref-only key.
+        std::fs::write(&path, lottie_fixture("[0,0,1,1]", "[1,1,0,1]"))
+            .expect("replace Lottie fixture");
+        let changed = preview
+            .resolve(
+                &dev.device,
+                &dev.queue,
+                &mut preview_cache,
+                &path,
+                0,
+                (16, 16),
+                "preview-lottie",
+            )
+            .expect("changed frame zero");
+        assert!(!Rc::ptr_eq(&first, &changed));
+        let changed_pixels = composite_texture(&dev.device, &dev.queue, changed);
+        let changed_center = &changed_pixels.rgba[(8 * 16 + 8) * 4..][..4];
+        assert!(
+            changed_center[2] > 200 && changed_center[0] < 30,
+            "{changed_center:?}"
+        );
+
+        // Invalid documents must become a typed frame failure owned by the
+        // playback loop, never a successful frame with a silently missing layer.
+        let invalid_path = temp.path().join("invalid-lottie.json");
+        std::fs::write(&invalid_path, b"{not valid lottie}").expect("write invalid fixture");
+        let mut media = HashMap::new();
+        media.insert(
+            "invalid".into(),
+            MediaInfo {
+                path: invalid_path,
+                straight_alpha: false,
+            },
+        );
+        let mut state = PlaybackResolverState::new(
+            media,
+            HashMap::new(),
+            30,
+            (16, 16),
+            MediaCancelToken::new(),
+        );
+        let invalid_source = TextureSource::Lottie {
+            media_ref: "invalid".into(),
+        };
+        let mut resolver = StreamingResolver::new(&dev.device, &dev.queue, &mut state);
+        assert!(resolver.resolve(&invalid_source, 0).is_none());
+        drop(resolver);
+        let error = state
+            .take_materialization_error()
+            .expect("playback must retain the materialization failure");
+        assert!(error.contains("parse Lottie document"), "{error}");
+    }
 
     #[test]
     fn bootstrap_request_has_zero_tolerance_at_exact_source_frame() {
diff --git a/src-tauri/src/render.rs b/src-tauri/src/render.rs
index 6cf938f7..102bf83c 100644
--- a/src-tauri/src/render.rs
+++ b/src-tauri/src/render.rs
@@ -7,11 +7,11 @@
 //! base64 PNG data URL the WebView paints onto a `<canvas>` (replacing the black
 //! placeholder shown on the Timeline tab).
 //!
-//! Scope: **video + image + text** layers. Text clips rasterize through
+//! Scope: **video + image + text + Lottie** layers. Text clips rasterize through
 //! `CosmicTextRasterizer` (cosmic-text glyph layout + swash raster) to a
 //! premultiplied-RGBA box texture composited last, like upstream's `CATextLayer`
-//! (#65). **Lottie** layers are still skipped (the resolver returns `None`, so
-//! the compositor omits them) until the bake path is wired (#65 follow-up).
+//! (#65). Lottie JSON is parsed by Velato and rasterized by Vello into the same
+//! device-local premultiplied-RGBA texture contract used by playback/export.
 //!
 //! The GPU device + compositor are acquired once and cached in Tauri managed
 //! state ([`RenderState`]); only the per-frame texture cache is short-lived. A
@@ -19,7 +19,8 @@
 //! (one frame at a time, no GPU contention). The continuous playback engine
 //! (#53) will move this onto a dedicated render thread.
 
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
+use std::num::NonZeroUsize;
 use std::path::PathBuf;
 use std::rc::Rc;
 use std::sync::atomic::{AtomicU64, Ordering};
@@ -27,20 +28,27 @@ use std::sync::Mutex;
 
 use base64::Engine as _;
 use serde::{Deserialize, Serialize};
+use sha2::{Digest, Sha256};
 use tauri::State;
 
 use opentake_core::{AppCore, EditCommand, ProjectRevision};
-use opentake_domain::{ClipType, MediaSource, TextStyle, Timeline};
+use opentake_domain::{ClipType, LutReference, MediaSource, TextStyle, Timeline};
 use opentake_media::{
-    decode_frame_at, decode_frame_at_cancellable, FrameRequest, MediaCancelToken,
+    decode_frame_at, decode_frame_at_cancellable, interpolate_frame_pair,
+    FrameInterpolationFallback, FrameInterpolationMode, FrameRequest, MediaCancelToken,
 };
 use opentake_ops::command::RenameEntry;
+use opentake_project::ProjectRoot;
+use opentake_render::gpu::compositor::{
+    TextureInterpolationConfig, TextureInterpolationFallback, TextureInterpolationMode,
+    TextureResolveRequest,
+};
 use opentake_render::gpu::texture::upload_rgba;
 use opentake_render::wgpu;
 use opentake_render::{
-    build_render_plan, even, Compositor, CosmicTextRasterizer, DecodedFrame, GpuTexture,
-    RenderDevice, RenderSize, SourceMetrics, TextRasterRequest, TextRasterizer, TextureCache,
-    TextureResolver, TextureSource,
+    even, try_build_render_plan, Compositor, CosmicTextRasterizer, DecodedFrame, GpuLutTexture,
+    GpuTexture, RenderDevice, RenderSize, SourceMetrics, TextRasterRequest, TextRasterizer,
+    TextureCache, TextureResolver, TextureSource,
 };
 
 /// Cap (longest canvas side, px) for a composite when the caller passes no
@@ -74,6 +82,8 @@ pub struct CompositeFrameRequest {
     pub session_id: String,
     pub session_generation: u64,
     pub seek_generation: u64,
+    #[serde(default)]
+    pub sequence_id: Option<String>,
 }
 
 /// Lazily-acquired GPU device + compositor, cached across composite calls.
@@ -83,6 +93,10 @@ struct GpuContext {
     compositor: Compositor,
     /// Text rasterizer (system fonts discovered once on first composite).
     text_rasterizer: CosmicTextRasterizer,
+    /// Vector pipelines are discarded when the GPU context is rebuilt, so they
+    /// never cross a device-loss boundary. Rc texture caches remain local to a
+    /// composite call because Tauri managed state must be Send + Sync.
+    lottie: LottieMaterializer,
 }
 
 /// Tauri managed state holding the (lazily created) GPU context. `None` until the
@@ -243,6 +257,7 @@ impl PreviewCompositeCoordinator {
 /// Resolvable info for one media asset, projected from the manifest.
 struct MediaInfo {
     path: PathBuf,
+    source_fps: Option<f64>,
 }
 
 /// A text clip projected from the timeline, keyed by clip id. The box's width /
@@ -259,21 +274,274 @@ struct TextInfo {
 /// auto-rotates on decode in this first cut).
 struct ManifestMetrics {
     sizes: HashMap<String, (u32, u32)>,
+    straight_alpha: HashSet<String>,
 }
 
 impl SourceMetrics for ManifestMetrics {
     fn natural_size(&self, media_ref: &str) -> Option<(u32, u32)> {
         self.sizes.get(media_ref).copied()
     }
+
+    fn needs_premultiply(&self, media_ref: &str) -> bool {
+        self.straight_alpha.contains(media_ref)
+    }
+}
+
+const MAX_LOTTIE_BYTES: usize = 8 * 1024 * 1024;
+const MAX_LOTTIE_DIMENSION: usize = 4096;
+
+struct CachedLottie {
+    content_hash: String,
+    composition: velato::Composition,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub(crate) struct LottieMetadata {
+    pub width: u32,
+    pub height: u32,
+    pub frame_rate: f64,
+    pub frame_count: i64,
+    pub duration_seconds: f64,
+}
+
+/// Device-lifetime Lottie JSON parser/rasterizer shared by preview, playback,
+/// and export. GPU textures live in the caller's [`TextureCache`]; parsed
+/// documents live here and are replaced whenever the source content hash
+/// changes. Dropping the owning GPU context drops both halves, so a recovered
+/// device never receives a texture or Vello pipeline created by the old device.
+pub(crate) struct LottieMaterializer {
+    documents: HashMap<PathBuf, CachedLottie>,
+    scene_renderer: velato::Renderer,
+    gpu_renderer: Option<velato::vello::Renderer>,
+}
+
+impl LottieMaterializer {
+    pub(crate) fn new() -> Self {
+        Self {
+            documents: HashMap::new(),
+            scene_renderer: velato::Renderer::new(),
+            gpu_renderer: None,
+        }
+    }
+
+    fn ensure_document(&mut self, path: &std::path::Path) -> Result<(), String> {
+        let bytes = std::fs::read(path)
+            .map_err(|error| format!("read Lottie document {}: {error}", path.display()))?;
+        if bytes.is_empty() || bytes.len() > MAX_LOTTIE_BYTES {
+            return Err(format!(
+                "Lottie document {} must be 1..={MAX_LOTTIE_BYTES} bytes (got {})",
+                path.display(),
+                bytes.len()
+            ));
+        }
+        let content_hash = format!("{:x}", Sha256::digest(&bytes));
+        let needs_parse = self
+            .documents
+            .get(path)
+            .is_none_or(|cached| cached.content_hash != content_hash);
+        if needs_parse {
+            let composition = std::panic::catch_unwind(|| velato::Composition::from_slice(&bytes))
+                .map_err(|_| {
+                    format!(
+                        "Lottie document {} uses an unsupported or malformed feature",
+                        path.display()
+                    )
+                })?
+                .map_err(|error| format!("parse Lottie document {}: {error}", path.display()))?;
+            validate_lottie(&composition, path)?;
+            self.documents.insert(
+                path.to_path_buf(),
+                CachedLottie {
+                    content_hash,
+                    composition,
+                },
+            );
+        }
+        Ok(())
+    }
+
+    pub(crate) fn metadata(&mut self, path: &std::path::Path) -> Result<LottieMetadata, String> {
+        self.ensure_document(path)?;
+        let composition = &self
+            .documents
+            .get(path)
+            .expect("document inserted or already cached")
+            .composition;
+        let frame_count = lottie_frame_count(composition);
+        Ok(LottieMetadata {
+            width: composition.width as u32,
+            height: composition.height as u32,
+            frame_rate: composition.frame_rate,
+            frame_count,
+            duration_seconds: frame_count as f64 / composition.frame_rate,
+        })
+    }
+
+    #[allow(clippy::too_many_arguments)]
+    pub(crate) fn resolve(
+        &mut self,
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        textures: &mut TextureCache,
+        path: &std::path::Path,
+        source_frame: i64,
+        render_box: (u32, u32),
+        label: &str,
+    ) -> Result<Rc<GpuTexture>, String> {
+        self.ensure_document(path)?;
+
+        let cached = self
+            .documents
+            .get(path)
+            .expect("document inserted or already cached");
+        let content_hash = cached.content_hash.clone();
+        let composition = &cached.composition;
+        let frame_count = lottie_frame_count(composition);
+        let internal_frame = source_frame.rem_euclid(frame_count);
+        let (width, height) = lottie_texture_size(composition, render_box);
+        let key = format!("l:{content_hash}:{internal_frame}:{width}x{height}");
+        if let Some(texture) = textures.get(&key) {
+            return Ok(texture);
+        }
+
+        let transform = velato::vello::kurbo::Affine::scale_non_uniform(
+            width as f64 / composition.width as f64,
+            height as f64 / composition.height as f64,
+        );
+        let frame = composition.frames.start + internal_frame as f64;
+        let scene = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
+            self.scene_renderer
+                .render(composition, frame, transform, 1.0)
+        }))
+        .map_err(|_| {
+            format!(
+                "render Lottie document {} failed on an unsupported feature",
+                path.display()
+            )
+        })?;
+        if self.gpu_renderer.is_none() {
+            self.gpu_renderer = Some(
+                velato::vello::Renderer::new(
+                    device,
+                    velato::vello::RendererOptions {
+                        surface_format: None,
+                        use_cpu: false,
+                        antialiasing_support: velato::vello::AaSupport::area_only(),
+                        num_init_threads: NonZeroUsize::new(1),
+                    },
+                )
+                .map_err(|error| format!("initialize Lottie GPU renderer: {error}"))?,
+            );
+        }
+
+        let texture = device.create_texture(&wgpu::TextureDescriptor {
+            label: Some(label),
+            size: wgpu::Extent3d {
+                width,
+                height,
+                depth_or_array_layers: 1,
+            },
+            mip_level_count: 1,
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D2,
+            format: wgpu::TextureFormat::Rgba8Unorm,
+            usage: wgpu::TextureUsages::STORAGE_BINDING
+                | wgpu::TextureUsages::TEXTURE_BINDING
+                | wgpu::TextureUsages::COPY_SRC,
+            view_formats: &[],
+        });
+        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
+        self.gpu_renderer
+            .as_mut()
+            .expect("renderer initialized above")
+            .render_to_texture(
+                device,
+                queue,
+                &scene,
+                &view,
+                &velato::vello::RenderParams {
+                    base_color: velato::vello::peniko::color::palette::css::TRANSPARENT,
+                    width,
+                    height,
+                    antialiasing_method: velato::vello::AaConfig::Area,
+                },
+            )
+            .map_err(|error| format!("render Lottie frame {internal_frame}: {error}"))?;
+
+        Ok(textures.insert(
+            key,
+            GpuTexture {
+                texture,
+                view,
+                width,
+                height,
+            },
+        ))
+    }
+}
+
+impl Default for LottieMaterializer {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+fn validate_lottie(
+    composition: &velato::Composition,
+    path: &std::path::Path,
+) -> Result<(), String> {
+    if composition.width == 0
+        || composition.height == 0
+        || composition.width > MAX_LOTTIE_DIMENSION
+        || composition.height > MAX_LOTTIE_DIMENSION
+    {
+        return Err(format!(
+            "Lottie document {} canvas must be within 1..={MAX_LOTTIE_DIMENSION} (got {}x{})",
+            path.display(),
+            composition.width,
+            composition.height
+        ));
+    }
+    if !composition.frames.start.is_finite()
+        || !composition.frames.end.is_finite()
+        || composition.frames.end <= composition.frames.start
+        || !composition.frame_rate.is_finite()
+        || composition.frame_rate <= 0.0
+    {
+        return Err(format!(
+            "Lottie document {} has an invalid frame range or frame rate",
+            path.display()
+        ));
+    }
+    Ok(())
+}
+
+fn lottie_frame_count(composition: &velato::Composition) -> i64 {
+    (composition.frames.end - composition.frames.start)
+        .ceil()
+        .clamp(1.0, i64::MAX as f64) as i64
+}
+
+fn lottie_texture_size(composition: &velato::Composition, render_box: (u32, u32)) -> (u32, u32) {
+    let max_width = render_box.0.max(1) as f64;
+    let max_height = render_box.1.max(1) as f64;
+    let scale = (max_width / composition.width as f64)
+        .min(max_height / composition.height as f64)
+        .min(1.0);
+    (
+        (composition.width as f64 * scale).round().max(1.0) as u32,
+        (composition.height as f64 * scale).round().max(1.0) as u32,
+    )
 }
 
 /// `TextureResolver` that decodes a layer's pixels on demand via ffmpeg and
-/// uploads them to the GPU (with a small LRU cache). Video/image only; text and
-/// Lottie return `None` (skipped by the compositor) in this cut.
+/// uploads them to the GPU (with a small LRU cache). Image and Lottie cache keys
+/// include source content hashes, so edited files cannot reuse stale textures.
 struct MediaResolver<'d> {
     device: &'d wgpu::Device,
     queue: &'d wgpu::Queue,
-    cache: TextureCache,
+    cache: &'d mut TextureCache,
+    lottie: &'d mut LottieMaterializer,
     media: &'d HashMap<String, MediaInfo>,
     timeline_fps: i32,
     /// Text clips by id (content + style + box) for on-demand rasterization.
@@ -283,6 +551,9 @@ struct MediaResolver<'d> {
     /// Downscale box for decoded source frames (matches the preview render size).
     preview_box: (u32, u32),
     cancel: &'d MediaCancelToken,
+    project_root: Option<&'d ProjectRoot>,
+    lut_cache: &'d mut HashMap<String, Rc<GpuLutTexture>>,
+    materialization_error: Option<String>,
 }
 
 impl MediaResolver<'_> {
@@ -308,26 +579,117 @@ impl MediaResolver<'_> {
         let tex = upload_rgba(self.device, self.queue, &frame, false, Some("preview-text"));
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_interpolated_video(
+        &mut self,
+        media_ref: &str,
+        source_frame: i64,
+        interpolation: TextureInterpolationConfig,
+    ) -> Option<Rc<GpuTexture>> {
+        let key = format!(
+            "vf:{media_ref}:{source_frame}:{:?}:{:.6}:{:.6}",
+            interpolation.mode, interpolation.source_fps, interpolation.target_fps
+        );
+        if let Some(tex) = self.cache.get(&key) {
+            return Some(tex);
+        }
+        let info = self.media.get(media_ref)?;
+        let source_fps = info.source_fps.unwrap_or(interpolation.source_fps);
+        if !source_fps.is_finite() || source_fps <= 0.0 {
+            return None;
+        }
+        let timestamp = source_frame.max(0) as f64 / interpolation.target_fps;
+        let source_position = timestamp * source_fps;
+        let first_index = source_position.floor().max(0.0) as i64;
+        let next_index = source_position.ceil().max(0.0) as i64;
+        let alpha = source_position - first_index as f64;
+        let decode = |index: i64| {
+            decode_frame_at_cancellable(
+                &info.path,
+                &FrameRequest {
+                    time_secs: index as f64 / source_fps,
+                    max_size: self.preview_box,
+                    tolerance_secs: 0.0,
+                    apply_rotation: true,
+                },
+                self.cancel,
+            )
+            .ok()
+            .map(|(_, frame)| frame)
+        };
+        let first = decode(first_index)?;
+        let last = if next_index == first_index {
+            first.clone()
+        } else {
+            // A half-open media duration may not expose the mathematical next
+            // frame at the tail. Hold the last decodable endpoint instead of
+            // dropping the whole layer to black.
+            decode(next_index).unwrap_or_else(|| first.clone())
+        };
+        let requested = match interpolation.mode {
+            TextureInterpolationMode::Nearest => FrameInterpolationMode::Nearest,
+            TextureInterpolationMode::Blend => FrameInterpolationMode::Blend,
+            TextureInterpolationMode::OpticalFlow => FrameInterpolationMode::OpticalFlow,
+        };
+        let fallback = match interpolation.fallback {
+            TextureInterpolationFallback::Nearest => FrameInterpolationFallback::Nearest,
+            TextureInterpolationFallback::Blend => FrameInterpolationFallback::Blend,
+            TextureInterpolationFallback::Error => FrameInterpolationFallback::Error,
+        };
+        let frame = interpolate_frame_pair(&first, &last, alpha, requested, fallback, true)
+            .ok()?
+            .frame;
+        let decoded = DecodedFrame::new(frame.width, frame.height, frame.rgba, false);
+        let tex = upload_rgba(
+            self.device,
+            self.queue,
+            &decoded,
+            false,
+            Some("preview-optical-flow"),
+        );
+        Some(self.cache.insert(key, tex))
+    }
 }
 
 impl TextureResolver for MediaResolver<'_> {
     fn resolve(&mut self, source: &TextureSource, source_frame: i64) -> Option<Rc<GpuTexture>> {
-        // Map the source to (asset id, cache key). Video keys per frame; images
-        // key once. Text rasterizes its box; Lottie is not supported yet.
-        let (media_ref, key, is_image) = match source {
-            TextureSource::Decoded { media_ref } => {
-                (media_ref, format!("v:{media_ref}:{source_frame}"), false)
-            }
-            TextureSource::Image { media_ref } => (media_ref, format!("i:{media_ref}"), true),
+        let (media_ref, is_image) = match source {
+            TextureSource::Decoded { media_ref } => (media_ref, false),
+            TextureSource::Image { media_ref } => (media_ref, true),
             TextureSource::Text { clip_id } => return self.resolve_text(clip_id),
-            TextureSource::Lottie { .. } => return None,
+            TextureSource::Lottie { media_ref } => {
+                let info = self.media.get(media_ref)?;
+                return match self.lottie.resolve(
+                    self.device,
+                    self.queue,
+                    self.cache,
+                    &info.path,
+                    source_frame,
+                    self.preview_box,
+                    "preview-lottie",
+                ) {
+                    Ok(texture) => Some(texture),
+                    Err(error) => {
+                        eprintln!("[render] {error}");
+                        self.materialization_error = Some(error);
+                        None
+                    }
+                };
+            }
+        };
+
+        let info = self.media.get(media_ref)?;
+        let key = if is_image {
+            let content_hash = opentake_media::file_sha256(&info.path).ok()?;
+            format!("i:{content_hash}")
+        } else {
+            format!("v:{media_ref}:{source_frame}")
         };
 
         if let Some(tex) = self.cache.get(&key) {
             return Some(tex);
         }
 
-        let info = self.media.get(media_ref)?;
         let time_secs = if is_image {
             0.0
         } else {
@@ -358,6 +720,44 @@ impl TextureResolver for MediaResolver<'_> {
         );
         Some(self.cache.insert(key, tex))
     }
+
+    fn resolve_with_interpolation(
+        &mut self,
+        request: TextureResolveRequest<'_>,
+    ) -> Option<Rc<GpuTexture>> {
+        match request.source {
+            TextureSource::Decoded { media_ref }
+                if request.interpolation.mode != TextureInterpolationMode::Nearest =>
+            {
+                self.resolve_interpolated_video(
+                    media_ref,
+                    request.source_frame,
+                    request.interpolation,
+                )
+            }
+            _ => self.resolve(request.source, request.source_frame),
+        }
+    }
+
+    fn resolve_lut(
+        &mut self,
+        reference: &LutReference,
+    ) -> Result<Option<Rc<GpuLutTexture>>, opentake_render::RenderError> {
+        if let Some(cached) = self.lut_cache.get(&reference.id) {
+            return Ok(Some(cached.clone()));
+        }
+        let resolved = crate::lut::resolve_project_lut(
+            self.project_root,
+            reference,
+            self.device,
+            self.queue,
+            "preview-lut",
+        )?;
+        if let Some(texture) = &resolved {
+            self.lut_cache.insert(reference.id.clone(), texture.clone());
+        }
+        Ok(resolved)
+    }
 }
 
 /// Preview render size: even-ized canvas, optionally downscaled so the longest
@@ -405,7 +805,7 @@ fn encode_png_data_url(frame: &DecodedFrame) -> Result<String, String> {
 /// for the preview) and [`capture_frame_to_media`] (which writes it to disk and
 /// imports it as a still). Out-of-range frames / an empty timeline composite to
 /// opaque black — the correct clear color, not an error.
-fn composite_rgba_for_snapshot(
+pub fn composite_timeline_frame(
     timeline: &Timeline,
     manifest: &opentake_domain::MediaManifest,
     project_dir: &Option<PathBuf>,
@@ -417,30 +817,41 @@ fn composite_rgba_for_snapshot(
     // Project text clips (content + style + box) so the resolver can rasterize
     // them on demand. Keyed by clip id, matching `TextureSource::Text { clip_id }`.
     let mut text: HashMap<String, TextInfo> = HashMap::new();
-    for track in &timeline.tracks {
-        for clip in &track.clips {
-            if clip.media_type != ClipType::Text {
-                continue;
+    for candidate in std::iter::once(timeline).chain(
+        timeline
+            .nested_sequences
+            .iter()
+            .map(|sequence| &sequence.timeline),
+    ) {
+        for track in &candidate.tracks {
+            for clip in &track.clips {
+                if clip.media_type != ClipType::Text {
+                    continue;
+                }
+                let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
+                    continue;
+                };
+                let tl = clip.transform.top_left();
+                text.insert(
+                    clip.id.clone(),
+                    TextInfo {
+                        content: content.clone(),
+                        style: style.clone(),
+                        box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
+                    },
+                );
             }
-            let (Some(content), Some(style)) = (&clip.text_content, &clip.text_style) else {
-                continue;
-            };
-            let tl = clip.transform.top_left();
-            text.insert(
-                clip.id.clone(),
-                TextInfo {
-                    content: content.clone(),
-                    style: style.clone(),
-                    box_norm: (tl.x, tl.y, clip.transform.width, clip.transform.height),
-                },
-            );
         }
     }
 
     // Project the manifest into render-side lookups.
     let mut sizes: HashMap<String, (u32, u32)> = HashMap::new();
+    let mut straight_alpha = HashSet::new();
     let mut media: HashMap<String, MediaInfo> = HashMap::new();
     for entry in &manifest.entries {
+        if entry.carries_straight_alpha() {
+            straight_alpha.insert(entry.id.clone());
+        }
         let path = match &entry.source {
             MediaSource::External { absolute_path } => PathBuf::from(absolute_path),
             MediaSource::Project { relative_path } => match &project_dir {
@@ -453,14 +864,29 @@ fn composite_rgba_for_snapshot(
                 sizes.insert(entry.id.clone(), (w as u32, h as u32));
             }
         }
-        media.insert(entry.id.clone(), MediaInfo { path });
+        media.insert(
+            entry.id.clone(),
+            MediaInfo {
+                path,
+                source_fps: entry.source_fps,
+            },
+        );
     }
 
     let render_size = preview_render_size(timeline.width, timeline.height, max_size);
 
-    let metrics = ManifestMetrics { sizes };
-    let plan = build_render_plan(timeline, render_size, &metrics);
+    let metrics = ManifestMetrics {
+        sizes,
+        straight_alpha,
+    };
+    let plan = try_build_render_plan(timeline, render_size, &metrics)
+        .map_err(|error| format!("invalid timeline graph: {error}"))?;
     let frame_plan = plan.frame(timeline, frame);
+    let project_root = project_dir
+        .as_deref()
+        .map(ProjectRoot::open)
+        .transpose()
+        .map_err(|error| format!("open project LUT storage: {error}"))?;
 
     // Acquire (or reuse) the GPU context, then composite + read back. The lock is
     // held across the render so the `Rc`-based texture cache never crosses threads.
@@ -480,30 +906,58 @@ fn composite_rgba_for_snapshot(
             queue: dev.queue,
             compositor,
             text_rasterizer,
+            lottie: LottieMaterializer::new(),
         });
     }
-    let ctx = guard.as_ref().expect("ctx set above");
-
-    let mut resolver = MediaResolver {
-        device: &ctx.device,
-        queue: &ctx.queue,
-        cache: TextureCache::new(TEXTURE_CACHE_CAP),
-        media: &media,
-        timeline_fps: plan.fps,
-        text: &text,
-        text_rasterizer: &ctx.text_rasterizer,
-        preview_box: (render_size.width, render_size.height),
-        cancel,
-    };
-    ctx.compositor
-        .render_to_rgba(
-            &ctx.device,
-            &ctx.queue,
-            render_size,
-            &frame_plan,
-            &mut resolver,
+    let result = {
+        let ctx = guard.as_mut().expect("ctx set above");
+        let mut texture_cache = TextureCache::new(TEXTURE_CACHE_CAP);
+        let mut lut_cache = HashMap::new();
+        let mut resolver = MediaResolver {
+            device: &ctx.device,
+            queue: &ctx.queue,
+            cache: &mut texture_cache,
+            lottie: &mut ctx.lottie,
+            media: &media,
+            timeline_fps: plan.fps,
+            text: &text,
+            text_rasterizer: &ctx.text_rasterizer,
+            preview_box: (render_size.width, render_size.height),
+            cancel,
+            project_root: project_root.as_ref(),
+            lut_cache: &mut lut_cache,
+            materialization_error: None,
+        };
+        let interpolation = TextureInterpolationConfig::new(
+            plan.fps as f64,
+            plan.fps as f64,
+            TextureInterpolationMode::OpticalFlow,
+            TextureInterpolationFallback::Blend,
         )
-        .map_err(|e| format!("composite render failed: {e}"))
+        .map_err(str::to_string)?;
+        let composite = ctx
+            .compositor
+            .render_to_rgba_with_interpolation(
+                &ctx.device,
+                &ctx.queue,
+                render_size,
+                &frame_plan,
+                &mut resolver,
+                interpolation,
+            )
+            .map_err(|e| format!("composite render failed: {e}"));
+        match resolver.materialization_error.take() {
+            Some(error) => Err(format!("Lottie materialization failed: {error}")),
+            None => composite,
+        }
+    };
+    if result.is_err() {
+        // A wgpu device loss or validation failure invalidates every pipeline
+        // and parsed-document renderer bound to this context. The next preview
+        // request reacquires a fresh device and starts with empty caches.
+        guard.take();
+    }
+    result
 }
 
 fn composite_rgba(
@@ -512,10 +966,30 @@ fn composite_rgba(
     frame: i32,
     max_size: u32,
     cancel: &MediaCancelToken,
+    sequence_id: Option<&str>,
 ) -> Result<DecodedFrame, String> {
     let snapshot = core.runtime_snapshot();
-    composite_rgba_for_snapshot(
-        &snapshot.timeline,
+    let selected = sequence_id
+        .map(|sequence_id| {
+            let mut timeline = snapshot
+                .timeline
+                .nested_sequences
+                .iter()
+                .find(|sequence| sequence.id == sequence_id)
+                .map(|sequence| sequence.timeline.clone())
+                .ok_or_else(|| format!("nested sequence not found: {sequence_id}"))?;
+            timeline.nested_sequences = snapshot.timeline.nested_sequences.clone();
+            timeline
+                .nested_sequences
+                .iter_mut()
+                .find(|sequence| sequence.id == sequence_id)
+                .expect("selected sequence came from this registry")
+                .timeline = opentake_domain::Timeline::new();
+            Ok::<_, String>(timeline)
+        })
+        .transpose()?;
+    composite_timeline_frame(
+        selected.as_ref().unwrap_or(&snapshot.timeline),
         &snapshot.media,
         &snapshot.project_dir,
         render,
@@ -554,6 +1028,7 @@ pub fn composite_frame(
         request.frame,
         max_size.unwrap_or(DEFAULT_PREVIEW_CAP),
         &cancel,
+        request.sequence_id.as_deref(),
     )?;
     if cancel.is_cancelled()
         || core.project_revision() != revision
@@ -666,7 +1141,7 @@ fn capture_frame_to_media_workflow(
 ) -> Result<crate::media::MediaListDto, String> {
     // Frame → RGBA. Timeline tab composites; video tab decodes the source frame.
     let composite = match source_media_id {
-        None => composite_rgba(core, render, frame, 0, &MediaCancelToken::new())?,
+        None => composite_rgba(core, render, frame, 0, &MediaCancelToken::new(), None)?,
         Some(id) => decode_source_frame(core, id, frame)?,
     };
 
@@ -809,7 +1284,7 @@ fn capture_freeze_frame_workflow(
     let project_dir = snapshot.project_dir;
     let (solo_timeline, solo_manifest) =
         build_freeze_capture_snapshot(&timeline, &manifest, clip_id)?;
-    let composite = composite_rgba_for_snapshot(
+    let composite = composite_timeline_frame(
         &solo_timeline,
         &solo_manifest,
         &project_dir,
@@ -1084,6 +1559,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
@@ -1101,6 +1578,8 @@ mod tests {
             source_height: Some(1080),
             source_fps: Some(30.0),
             has_audio: Some(false),
+            color: None,
+            proxy: None,
             folder_id: None,
             cached_remote_url: None,
             cached_remote_url_expires_at: None,
diff --git a/src-tauri/src/samples.rs b/src-tauri/src/samples.rs
new file mode 100644
index 00000000..8bc7f1ab
--- /dev/null
+++ b/src-tauri/src/samples.rs
@@ -0,0 +1,547 @@
+//! Remote sample-project materialization.
+//!
+//! A sample is assembled below the application cache, validated as a complete
+//! `.opentake` bundle, and only then renamed into its stable cache location.
+//! Any fetch, decode, write, or validation failure removes the entire staging
+//! directory and leaves a previously cached sample untouched.
+
+use std::collections::HashSet;
+use std::fs;
+use std::io::{Read, Write};
+use std::path::{Component, Path, PathBuf};
+use std::time::Duration;
+
+use opentake_domain::{Clip, ClipType, MediaManifest, TextStyle, Timeline, Track};
+use opentake_project::{layout, Project};
+use reqwest::blocking::{Client, Response};
+use reqwest::redirect::Policy;
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use tauri::{AppHandle, Emitter, Manager};
+
+const MAX_RESOLVE_BYTES: u64 = 4 * 1024 * 1024;
+const MAX_DOWNLOAD_BYTES: u64 = 2 * 1024 * 1024 * 1024;
+const REQUEST_TIMEOUT: Duration = Duration::from_secs(60);
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct SampleDownload {
+    id: String,
+    relative_path: String,
+    url: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+struct SampleChatDownload {
+    name: String,
+    url: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct ResolvedSample {
+    title: String,
+    project: Value,
+    manifest: Value,
+    #[serde(default)]
+    generation_log: Option<Value>,
+    #[serde(default)]
+    poster_url: Option<String>,
+    #[serde(default)]
+    downloads: Vec<SampleDownload>,
+    #[serde(default)]
+    chat: Vec<SampleChatDownload>,
+}
+
+#[derive(Debug, Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct SampleProgress {
+    slug: String,
+    completed: usize,
+    total: usize,
+}
+
+struct StagingDirectory {
+    path: PathBuf,
+    armed: bool,
+}
+
+impl Drop for StagingDirectory {
+    fn drop(&mut self) {
+        if self.armed {
+            let _ = fs::remove_dir_all(&self.path);
+        }
+    }
+}
+
+struct SampleProjectService {
+    cache_root: PathBuf,
+    client: Client,
+}
+
+impl SampleProjectService {
+    fn new(cache_root: PathBuf) -> Result<Self, String> {
+        Ok(Self {
+            cache_root,
+            client: Client::builder()
+                .redirect(Policy::limited(5))
+                .timeout(REQUEST_TIMEOUT)
+                .build()
+                .map_err(|error| format!("configure sample HTTP client: {error}"))?,
+        })
+    }
+
+    fn materialize(
+        &self,
+        backend_url: &str,
+        slug: &str,
+        on_progress: impl FnMut(f64),
+    ) -> Result<PathBuf, String> {
+        validate_slug(slug)?;
+        let mut endpoint = validated_network_url(backend_url)?;
+        endpoint.set_path("/v1/samples/resolve");
+        endpoint.set_query(None);
+        endpoint.query_pairs_mut().append_pair("slug", slug);
+        let response = self
+            .client
+            .get(endpoint)
+            .send()
+            .map_err(|error| format!("resolve sample {slug}: {error}"))?;
+        let bytes = read_bounded_response(response, MAX_RESOLVE_BYTES, "sample metadata")?;
+        let resolved: ResolvedSample = serde_json::from_slice(&bytes)
+            .map_err(|error| format!("decode sample {slug}: {error}"))?;
+        self.materialize_resolved(
+            slug,
+            resolved,
+            |download, target| self.download_file(download, target),
+            on_progress,
+        )
+    }
+
+    fn materialize_builtin(
+        &self,
+        slug: &str,
+        on_progress: impl FnMut(f64),
+    ) -> Result<PathBuf, String> {
+        self.materialize_resolved(
+            slug,
+            builtin_sample(slug)?,
+            |_, _| Err("built-in sample unexpectedly requested a download".into()),
+            on_progress,
+        )
+    }
+
+    fn materialize_resolved(
+        &self,
+        slug: &str,
+        resolved: ResolvedSample,
+        mut download_file: impl FnMut(&SampleDownload, &Path) -> Result<(), String>,
+        mut on_progress: impl FnMut(f64),
+    ) -> Result<PathBuf, String> {
+        validate_slug(slug)?;
+        fs::create_dir_all(&self.cache_root)
+            .map_err(|error| format!("create sample cache: {error}"))?;
+        let stage_root = self
+            .cache_root
+            .join(format!(".{slug}.{}.tmp", uuid::Uuid::new_v4()));
+        fs::create_dir(&stage_root).map_err(|error| format!("create sample stage: {error}"))?;
+        let mut stage = StagingDirectory {
+            path: stage_root,
+            armed: true,
+        };
+        let bundle = stage
+            .path
+            .join(format!("{}.opentake", safe_name(&resolved.title)));
+        fs::create_dir_all(bundle.join(layout::MEDIA_DIR))
+            .map_err(|error| format!("create sample bundle: {error}"))?;
+        write_json(&bundle.join(layout::TIMELINE_FILE), &resolved.project)?;
+        write_json(&bundle.join(layout::MANIFEST_FILE), &resolved.manifest)?;
+        if let Some(log) = &resolved.generation_log {
+            write_json(&bundle.join(layout::GENERATION_LOG_FILE), log)?;
+        }
+
+        let mut downloads = resolved.downloads;
+        downloads.extend(resolved.chat.into_iter().map(|chat| SampleDownload {
+            id: chat.name.clone(),
+            relative_path: format!("chat-sessions/{}", chat.name),
+            url: chat.url,
+        }));
+        if let Some(url) = resolved.poster_url {
+            downloads.push(SampleDownload {
+                id: "poster".into(),
+                relative_path: layout::THUMBNAIL_FILE.into(),
+                url,
+            });
+        }
+        validate_downloads(&downloads)?;
+        let total = downloads.len().max(1);
+        on_progress(0.0);
+        if downloads.is_empty() {
+            on_progress(1.0);
+        }
+        for (index, download) in downloads.iter().enumerate() {
+            let target = safe_target(&bundle, &download.relative_path)?;
+            if let Some(parent) = target.parent() {
+                fs::create_dir_all(parent)
+                    .map_err(|error| format!("create sample download directory: {error}"))?;
+            }
+            download_file(download, &target)?;
+            on_progress((index + 1) as f64 / total as f64);
+        }
+
+        Project::open(&bundle).map_err(|error| format!("validate sample bundle: {error}"))?;
+        let stable_root = self.cache_root.join(slug);
+        let backup = self.cache_root.join(format!(".{slug}.backup"));
+        let _ = fs::remove_dir_all(&backup);
+        if stable_root.exists() {
+            fs::rename(&stable_root, &backup)
+                .map_err(|error| format!("preserve cached sample: {error}"))?;
+        }
+        if let Err(error) = fs::rename(&stage.path, &stable_root) {
+            if backup.exists() {
+                let _ = fs::rename(&backup, &stable_root);
+            }
+            return Err(format!("publish sample: {error}"));
+        }
+        stage.armed = false;
+        let _ = fs::remove_dir_all(&backup);
+        Ok(stable_root.join(bundle.file_name().unwrap_or_default()))
+    }
+
+    fn download_file(&self, download: &SampleDownload, target: &Path) -> Result<(), String> {
+        let url = validated_network_url(&download.url)?;
+        let mut response = self
+            .client
+            .get(url)
+            .send()
+            .map_err(|error| format!("download sample file {}: {error}", download.id))?;
+        validate_response(&response, MAX_DOWNLOAD_BYTES, &download.id)?;
+        let temp = target.with_extension(format!("download-{}.tmp", uuid::Uuid::new_v4()));
+        let result = (|| {
+            let mut file = fs::File::create(&temp)
+                .map_err(|error| format!("create sample file {}: {error}", download.id))?;
+            let mut copied = 0_u64;
+            let mut buffer = [0_u8; 128 * 1024];
+            loop {
+                let read = response
+                    .read(&mut buffer)
+                    .map_err(|error| format!("read sample file {}: {error}", download.id))?;
+                if read == 0 {
+                    break;
+                }
+                copied = copied.saturating_add(read as u64);
+                if copied > MAX_DOWNLOAD_BYTES {
+                    return Err(format!(
+                        "{}: response exceeds {} bytes",
+                        download.id, MAX_DOWNLOAD_BYTES
+                    ));
+                }
+                file.write_all(&buffer[..read])
+                    .map_err(|error| format!("write sample file {}: {error}", download.id))?;
+            }
+            file.sync_all()
+                .map_err(|error| format!("sync sample file {}: {error}", download.id))?;
+            fs::rename(&temp, target)
+                .map_err(|error| format!("publish sample file {}: {error}", download.id))
+        })();
+        if result.is_err() {
+            let _ = fs::remove_file(&temp);
+        }
+        result
+    }
+}
+
+fn builtin_sample(slug: &str) -> Result<ResolvedSample, String> {
+    let (title, cards): (&str, &[&str]) = match slug {
+        "product-demo" => (
+            "OpenTake Product Demo",
+            &[
+                "Welcome to OpenTake",
+                "Import media, trim clips, and add captions",
+                "Export when your story is ready",
+            ],
+        ),
+        "quick-tutorial" => (
+            "OpenTake Quick Tutorial",
+            &[
+                "1. Import media from the Media panel",
+                "2. Drag clips onto the timeline and trim their edges",
+                "3. Press Space to preview, then Export",
+            ],
+        ),
+        "template-project" => ("OpenTake Template", &[]),
+        _ => return Err(format!("unknown built-in sample: {slug}")),
+    };
+    let mut timeline = Timeline::new();
+    timeline.settings_configured = true;
+    if !cards.is_empty() {
+        let mut track = Track::new("sample-text", ClipType::Text);
+        for (index, content) in cards.iter().enumerate() {
+            let mut clip = Clip::new(format!("sample-text-{index}"), "", index as i32 * 120, 120);
+            clip.media_type = ClipType::Text;
+            clip.source_clip_type = ClipType::Text;
+            clip.text_content = Some((*content).into());
+            clip.text_style = Some(TextStyle::default());
+            track.clips.push(clip);
+        }
+        timeline.tracks.push(track);
+    }
+    Ok(ResolvedSample {
+        title: title.into(),
+        project: serde_json::to_value(timeline)
+            .map_err(|error| format!("encode built-in sample timeline: {error}"))?,
+        manifest: serde_json::to_value(MediaManifest::new())
+            .map_err(|error| format!("encode built-in sample manifest: {error}"))?,
+        generation_log: None,
+        poster_url: None,
+        downloads: vec![],
+        chat: vec![],
+    })
+}
+
+fn write_json(path: &Path, value: &Value) -> Result<(), String> {
+    let bytes = serde_json::to_vec_pretty(value)
+        .map_err(|error| format!("encode {}: {error}", path.display()))?;
+    fs::write(path, bytes).map_err(|error| format!("write {}: {error}", path.display()))
+}
+
+fn validate_slug(slug: &str) -> Result<(), String> {
+    if slug.is_empty()
+        || slug.len() > 80
+        || !slug
+            .bytes()
+            .all(|byte| byte.is_ascii_alphanumeric() || byte == b'-' || byte == b'_')
+    {
+        return Err("sample slug must contain only ASCII letters, digits, '-' or '_'".into());
+    }
+    Ok(())
+}
+
+fn safe_name(value: &str) -> String {
+    let clean = value
+        .chars()
+        .map(|character| match character {
+            '/' | '\\' | ':' => ' ',
+            other => other,
+        })
+        .collect::<String>();
+    let trimmed = clean.trim();
+    if trimmed.is_empty() {
+        "Sample".into()
+    } else {
+        trimmed.chars().take(120).collect()
+    }
+}
+
+fn validate_downloads(downloads: &[SampleDownload]) -> Result<(), String> {
+    let mut paths = HashSet::new();
+    for download in downloads {
+        validated_network_url(&download.url)?;
+        let normalized = Path::new(&download.relative_path);
+        if normalized.as_os_str().is_empty()
+            || normalized
+                .components()
+                .any(|component| !matches!(component, Component::Normal(_)))
+        {
+            return Err(format!("unsafe sample path: {}", download.relative_path));
+        }
+        if !paths.insert(download.relative_path.clone()) {
+            return Err(format!("duplicate sample path: {}", download.relative_path));
+        }
+    }
+    Ok(())
+}
+
+fn safe_target(root: &Path, relative: &str) -> Result<PathBuf, String> {
+    let path = Path::new(relative);
+    if path
+        .components()
+        .any(|component| !matches!(component, Component::Normal(_)))
+    {
+        return Err(format!("unsafe sample path: {relative}"));
+    }
+    Ok(root.join(path))
+}
+
+fn validated_network_url(raw: &str) -> Result<reqwest::Url, String> {
+    let url = reqwest::Url::parse(raw).map_err(|error| format!("invalid sample URL: {error}"))?;
+    let loopback = url.host_str().is_some_and(|host| {
+        host.eq_ignore_ascii_case("localhost")
+            || host
+                .trim_start_matches('[')
+                .trim_end_matches(']')
+                .parse::<std::net::IpAddr>()
+                .is_ok_and(|address| address.is_loopback())
+    });
+    if url.scheme() != "https" && !(url.scheme() == "http" && loopback) {
+        return Err("sample URL must use HTTPS or loopback HTTP".into());
+    }
+    if !url.username().is_empty() || url.password().is_some() || url.host_str().is_none() {
+        return Err("sample URL contains unsupported credentials or host".into());
+    }
+    Ok(url)
+}
+
+fn read_bounded_response(mut response: Response, max: u64, label: &str) -> Result<Vec<u8>, String> {
+    validate_response(&response, max, label)?;
+    let mut bytes = Vec::new();
+    response
+        .by_ref()
+        .take(max + 1)
+        .read_to_end(&mut bytes)
+        .map_err(|error| format!("read {label}: {error}"))?;
+    if bytes.len() as u64 > max {
+        return Err(format!("{label}: response exceeds {max} bytes"));
+    }
+    Ok(bytes)
+}
+
+fn validate_response(response: &Response, max: u64, label: &str) -> Result<(), String> {
+    if !response.status().is_success() {
+        return Err(format!(
+            "{label}: server returned HTTP {}",
+            response.status()
+        ));
+    }
+    if response.content_length().is_some_and(|length| length > max) {
+        return Err(format!("{label}: response exceeds {max} bytes"));
+    }
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn sample_project_materialize(app: AppHandle, slug: String) -> Result<String, String> {
+    let backend = crate::account::configured_backend_url().ok().flatten();
+    let cache = app
+        .path()
+        .app_cache_dir()
+        .map_err(|error| format!("resolve sample cache: {error}"))?
+        .join("samples");
+    let progress_app = app.clone();
+    let progress_slug = slug.clone();
+    tauri::async_runtime::spawn_blocking(move || {
+        let service = SampleProjectService::new(cache)?;
+        let progress = |fraction: f64| {
+            let total = 10_000;
+            let _ = progress_app.emit(
+                "sample-materialization-progress",
+                SampleProgress {
+                    slug: progress_slug.clone(),
+                    completed: (fraction * total as f64).round() as usize,
+                    total,
+                },
+            );
+        };
+        match backend {
+            Some(backend) => service.materialize(&backend, &slug, progress),
+            None => service.materialize_builtin(&slug, progress),
+        }
+        .map(|path| path.to_string_lossy().into_owned())
+    })
+    .await
+    .map_err(|error| format!("sample materialization task failed: {error}"))?
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use opentake_domain::{MediaManifest, Timeline};
+
+    #[test]
+    fn failed_materialization_rolls_back_entire_sample_directory() {
+        let cache = tempfile::tempdir().unwrap();
+        let service = SampleProjectService::new(cache.path().to_path_buf()).unwrap();
+        let sample = ResolvedSample {
+            title: "Rollback demo".into(),
+            project: serde_json::to_value(Timeline::new()).unwrap(),
+            manifest: serde_json::to_value(MediaManifest::new()).unwrap(),
+            generation_log: None,
+            poster_url: None,
+            downloads: vec![
+                SampleDownload {
+                    id: "first".into(),
+                    relative_path: "media/first.bin".into(),
+                    url: "https://samples.example/first".into(),
+                },
+                SampleDownload {
+                    id: "broken".into(),
+                    relative_path: "media/broken.bin".into(),
+                    url: "https://samples.example/broken".into(),
+                },
+            ],
+            chat: vec![],
+        };
+
+        let error = service
+            .materialize_resolved(
+                "rollback-demo",
+                sample,
+                |download, target| {
+                    if download.id == "broken" {
+                        return Err("fixture download failed".into());
+                    }
+                    fs::write(target, b"complete bytes").map_err(|error| error.to_string())
+                },
+                |_| {},
+            )
+            .unwrap_err();
+
+        assert!(error.contains("fixture download failed"), "{error}");
+        assert!(!cache.path().join("rollback-demo").exists());
+        assert_eq!(fs::read_dir(cache.path()).unwrap().count(), 0);
+    }
+
+    #[test]
+    fn successful_materialization_publishes_a_valid_bundle_and_completes_progress() {
+        let cache = tempfile::tempdir().unwrap();
+        let service = SampleProjectService::new(cache.path().to_path_buf()).unwrap();
+        let sample = ResolvedSample {
+            title: "Starter / sample".into(),
+            project: serde_json::to_value(Timeline::new()).unwrap(),
+            manifest: serde_json::to_value(MediaManifest::new()).unwrap(),
+            generation_log: None,
+            poster_url: None,
+            downloads: vec![],
+            chat: vec![],
+        };
+        let mut progress = Vec::new();
+
+        let bundle = service
+            .materialize_resolved(
+                "starter",
+                sample,
+                |_, _| panic!("empty sample must not download"),
+                |value| progress.push(value),
+            )
+            .unwrap();
+
+        assert_eq!(progress, vec![0.0, 1.0]);
+        assert_eq!(
+            bundle.file_name().and_then(|name| name.to_str()),
+            Some("Starter   sample.opentake")
+        );
+        Project::open(bundle).unwrap();
+        assert_eq!(fs::read_dir(cache.path()).unwrap().count(), 1);
+    }
+
+    #[test]
+    fn built_in_tutorial_is_offline_and_contains_editing_steps() {
+        let cache = tempfile::tempdir().unwrap();
+        let service = SampleProjectService::new(cache.path().to_path_buf()).unwrap();
+
+        let bundle = service
+            .materialize_builtin("quick-tutorial", |_| {})
+            .unwrap();
+        let project = Project::open(bundle).unwrap();
+
+        let text = project.timeline.tracks[0]
+            .clips
+            .iter()
+            .filter_map(|clip| clip.text_content.as_deref())
+            .collect::<Vec<_>>()
+            .join(" ");
+        assert!(text.contains("Import media"));
+        assert!(text.contains("Press Space"));
+        assert_eq!(project.timeline.total_frames(), 360);
+    }
+}
diff --git a/src-tauri/src/search.rs b/src-tauri/src/search.rs
index e27197ab..ba2f80d4 100644
--- a/src-tauri/src/search.rs
+++ b/src-tauri/src/search.rs
@@ -202,11 +202,13 @@ fn moment_dto(h: &opentake_media::Hit, fps: i32) -> MomentHitDto {
 
 /// One indexable/searchable asset resolved from the live manifest: id, absolute
 /// source path, and kind (drives visual vs. spoken candidacy).
+#[derive(Clone)]
 struct ResolvedAsset {
     id: String,
     name: String,
     path: PathBuf,
     kind: ClipType,
+    has_audio: bool,
 }
 
 /// Resolve every manifest asset to `(id, name, path, kind)`, dropping any whose
@@ -233,6 +235,7 @@ fn resolve_assets_from_snapshot(
                 name: e.name.clone(),
                 path,
                 kind: e.kind,
+                has_audio: e.has_audio.unwrap_or(false),
             })
         })
         .collect()
@@ -336,11 +339,62 @@ pub fn search_index_start(
     media: State<'_, MediaState>,
 ) -> Result<SearchIndexStatusDto, String> {
     let engine = media.engine();
-    let embedder = load_embedder(engine)?;
     let assets = resolve_assets(&core);
-    index_assets(app, engine, &assets, &embedder)?;
-    // Return a fresh status snapshot so the UI settles on the final counts.
-    Ok(index_status_snapshot(engine, &assets))
+    let cache_root = engine.cache_root().to_path_buf();
+    let models_dir = engine.models_dir().to_path_buf();
+    let pressure = engine.export_pause();
+    let worker = production_index_worker(pressure.clone());
+    let spec = search_config::embedder_spec();
+    let source_identity = assets
+        .iter()
+        .map(|asset| {
+            opentake_media::cache_key::file_identity_key(&asset.path)
+                .unwrap_or_else(|| format!("missing:{}", asset.id))
+        })
+        .collect::<Vec<_>>()
+        .join("|");
+    let request = opentake_media::ort_worker::JobRequest::new(
+        opentake_media::ort_worker::JobKind::Index,
+        format!("{}@{}", spec.model, spec.version),
+        format!(
+            "{}:{}@{}:{source_identity}",
+            cache_root.display(),
+            spec.model,
+            spec.version
+        ),
+        opentake_media::ort_worker::JobPriority::Background,
+    );
+    let handle = worker
+        .submit(request, move |models, cancel| {
+            let job_engine = MediaEngine::new(cache_root, models_dir.clone());
+            let model_key = format!("{}@{}:{}", spec.model, spec.version, models_dir.display());
+            let embedder = models.get_or_try_init(&model_key, || {
+                load_embedder(&job_engine).map_err(opentake_media::ort_worker::WorkerError::Model)
+            })?;
+            index_assets(
+                app,
+                &job_engine,
+                &assets,
+                embedder.as_ref(),
+                cancel,
+                &pressure,
+            )
+            .map_err(opentake_media::ort_worker::WorkerError::Job)?;
+            Ok(index_status_snapshot(&job_engine, &assets))
+        })
+        .map_err(|error| error.to_string())?;
+    handle.wait().map_err(|error| error.to_string())
+}
+
+/// One process-wide production worker. `MediaState` itself is process-wide, so
+/// the first command supplies the same shared playback/export pressure counter
+/// observed by every later request.
+fn production_index_worker(
+    pressure: opentake_media::ExportPause,
+) -> &'static opentake_media::ort_worker::OrtWorker {
+    static WORKER: std::sync::OnceLock<opentake_media::ort_worker::OrtWorker> =
+        std::sync::OnceLock::new();
+    WORKER.get_or_init(|| opentake_media::ort_worker::OrtWorker::spawn(pressure, 8))
 }
 
 /// `search_query`: run the three-group content query — Moments (visual, when the
@@ -518,21 +572,29 @@ fn index_assets(
     engine: &MediaEngine,
     assets: &[ResolvedAsset],
     embedder: &opentake_media::search::OrtEmbedder,
+    cancel: &opentake_media::search::CancelToken,
+    pressure: &opentake_media::ExportPause,
 ) -> Result<(), String> {
     use opentake_media::search::Embedder;
-    use opentake_media::search::{
-        index_image, index_video, needs_index, CancelToken, SamplerOptions,
-    };
+    use opentake_media::search::{index_image, index_video, needs_index, SamplerOptions};
 
     let spec = Embedder::spec(embedder).clone();
     let cache_root = engine.cache_root();
-    let cancel = CancelToken::new();
     let opts = SamplerOptions::default();
 
-    // Only assets that actually need work (idempotent), preserving order.
+    // Only assets that actually need visual or transcript work (idempotent),
+    // preserving manifest order. File identity plus model/sampler versions are
+    // encoded in the two stores, so changed media and model upgrades invalidate
+    // themselves and an interrupted run resumes only missing work.
     let pending: Vec<&ResolvedAsset> = assets
         .iter()
-        .filter(|a| is_visual(a.kind) && needs_index(cache_root, &a.path, &spec))
+        .filter(|a| {
+            let visual = is_visual(a.kind) && needs_index(cache_root, &a.path, &spec);
+            let transcript = (a.kind == ClipType::Audio
+                || (a.kind == ClipType::Video && a.has_audio))
+                && !opentake_media::transcribe::cache::has_cached_on_disk(cache_root, &a.path);
+            visual || transcript
+        })
         .collect();
     let total = pending.len();
     if total == 0 {
@@ -548,6 +610,13 @@ fn index_assets(
     }
 
     for (i, a) in pending.iter().enumerate() {
+        if cancel.is_cancelled() {
+            return Err("indexing cancelled".into());
+        }
+        if !pressure.wait_while_active(|| cancel.is_cancelled()) {
+            return Err("indexing cancelled while yielding to playback/export".into());
+        }
+
         // Per-asset progress: forward the sampler's fraction into the batch.
         let base = i;
         let on_progress = |frac: f64| {
@@ -563,11 +632,11 @@ fn index_assets(
 
         // A per-asset failure (offline file, decode error) is skipped — one bad
         // clip must not abort the batch (upstream `failedIds.insert` + continue).
-        let result = match a.kind {
+        let visual_result = match a.kind {
             ClipType::Image => match engine.image_thumbnail(&a.path) {
                 // Reuse the decoded thumbnail as the still's frame; a full-res
                 // decode is unnecessary for a single squash-resized embedding.
-                Ok(frame) => index_image(cache_root, &a.path, &frame, embedder, &cancel),
+                Ok(frame) => index_image(cache_root, &a.path, &frame, embedder, cancel),
                 Err(e) => Err(e),
             },
             ClipType::Video => {
@@ -589,15 +658,41 @@ fn index_assets(
                     height,
                     embedder,
                     &opts,
-                    &cancel,
+                    cancel,
                     Some(&on_progress),
                 )
             }
             _ => Ok(()),
         };
-        if let Err(e) = result {
+        if let Err(e) = visual_result {
+            if cancel.is_cancelled() {
+                return Err("indexing cancelled".into());
+            }
             eprintln!("[search] index failed {}: {e}", a.path.display());
         }
+
+        // Automatic spoken indexing shares the same one-worker boundary. A
+        // missing whisper model or bad audio marks only this asset failed; the
+        // visual store and remaining assets still converge on restart.
+        let needs_transcript = (a.kind == ClipType::Audio
+            || (a.kind == ClipType::Video && a.has_audio))
+            && !opentake_media::transcribe::cache::has_cached_on_disk(cache_root, &a.path);
+        if needs_transcript {
+            if cancel.is_cancelled() {
+                return Err("transcription cancelled".into());
+            }
+            if let Err(error) = crate::transcribe::transcribe_with_cache(
+                engine,
+                &a.path,
+                a.kind == ClipType::Video,
+                None,
+            ) {
+                eprintln!(
+                    "[search] transcription failed {}: {error}",
+                    a.path.display()
+                );
+            }
+        }
         emit_completed(&app, i + 1, total);
     }
     Ok(())
@@ -642,6 +737,233 @@ fn index_status_snapshot(engine: &MediaEngine, assets: &[ResolvedAsset]) -> Sear
 mod tests {
     use super::*;
 
+    #[test]
+    fn bounded_single_worker_cancels_skips_stale_and_yields_to_playback_export() {
+        use opentake_media::ort_worker::{
+            JobKind, JobPriority, JobRequest, JobState, OrtWorker, WorkerError,
+        };
+        use std::sync::atomic::{AtomicUsize, Ordering};
+        use std::sync::{Arc, Mutex};
+        use std::time::Duration;
+
+        let pause = opentake_media::ExportPause::new();
+        let worker = OrtWorker::spawn(pause.clone(), 4);
+        let active = Arc::new(AtomicUsize::new(0));
+        let max_active = Arc::new(AtomicUsize::new(0));
+        let order = Arc::new(Mutex::new(Vec::new()));
+
+        let submit = |key: &str, priority: JobPriority, marker: usize| {
+            let active = active.clone();
+            let max_active = max_active.clone();
+            let order = order.clone();
+            worker.submit(
+                JobRequest::new(JobKind::Index, "siglip2@1", key, priority),
+                move |_models, cancel| {
+                    let now = active.fetch_add(1, Ordering::SeqCst) + 1;
+                    max_active.fetch_max(now, Ordering::SeqCst);
+                    for _ in 0..20 {
+                        if cancel.is_cancelled() {
+                            active.fetch_sub(1, Ordering::SeqCst);
+                            return Err(WorkerError::Cancelled);
+                        }
+                        std::thread::sleep(Duration::from_millis(1));
+                    }
+                    order.lock().unwrap().push(marker);
+                    active.fetch_sub(1, Ordering::SeqCst);
+                    Ok(marker)
+                },
+            )
+        };
+
+        // Playback/export pressure prevents any queued inference from starting.
+        let pressure = pause.guard();
+        let low = submit("asset-low", JobPriority::Background, 1).unwrap();
+        let high_a = submit("asset-high-a", JobPriority::Interactive, 2).unwrap();
+        let high_b = submit("asset-high-b", JobPriority::Interactive, 3).unwrap();
+        let duplicate = submit("asset-high-a", JobPriority::Interactive, 99).unwrap();
+        std::thread::sleep(Duration::from_millis(30));
+        assert_eq!(low.state(), JobState::Queued);
+        assert!(order.lock().unwrap().is_empty());
+        drop(pressure);
+
+        assert_eq!(high_a.wait().unwrap(), 2);
+        assert_eq!(duplicate.wait().unwrap(), 2); // one persisted result, no duplicate work
+        assert_eq!(high_b.wait().unwrap(), 3);
+        assert_eq!(low.wait().unwrap(), 1);
+        assert_eq!(*order.lock().unwrap(), vec![2, 3, 1]); // FIFO within priority
+        assert_eq!(max_active.load(Ordering::SeqCst), 1);
+
+        // A queued cancellation never runs; a running cancellation cooperates
+        // at a batch boundary and the next model error/panic cannot kill worker.
+        let blocker = submit("blocker", JobPriority::Interactive, 4).unwrap();
+        let queued = submit("queued-cancel", JobPriority::Background, 5).unwrap();
+        queued.cancel();
+        assert_eq!(blocker.wait().unwrap(), 4);
+        assert_eq!(queued.wait(), Err(WorkerError::Cancelled));
+        assert_eq!(queued.state(), JobState::Cancelled);
+
+        let running = submit("running-cancel", JobPriority::Interactive, 6).unwrap();
+        running.wait_until_running(Duration::from_secs(1)).unwrap();
+        running.cancel();
+        assert_eq!(running.wait(), Err(WorkerError::Cancelled));
+
+        let model_failure = worker
+            .submit::<usize, _>(
+                JobRequest::new(
+                    JobKind::Transcribe,
+                    "whisper@1",
+                    "model-failure",
+                    JobPriority::Background,
+                ),
+                |_models, _cancel| Err(WorkerError::Model("fixture failure".into())),
+            )
+            .unwrap();
+        assert!(matches!(model_failure.wait(), Err(WorkerError::Model(_))));
+        let retried = submit("model-failure", JobPriority::Background, 12).unwrap();
+        assert_eq!(retried.wait().unwrap(), 12);
+        let panicked = worker
+            .submit::<usize, _>(
+                JobRequest::new(
+                    JobKind::Index,
+                    "siglip2@1",
+                    "panic",
+                    JobPriority::Background,
+                ),
+                |_models, _cancel| panic!("fixture panic"),
+            )
+            .unwrap();
+        assert_eq!(panicked.wait(), Err(WorkerError::Panicked));
+        let recovered = submit("recovered", JobPriority::Background, 7).unwrap();
+        assert_eq!(recovered.wait().unwrap(), 7);
+
+        let model_loads = Arc::new(AtomicUsize::new(0));
+        for key in ["registry-a", "registry-b"] {
+            let model_loads = model_loads.clone();
+            let handle = worker
+                .submit(
+                    JobRequest::new(
+                        JobKind::Search,
+                        "shared-model@1",
+                        key,
+                        JobPriority::Interactive,
+                    ),
+                    move |models, _cancel| {
+                        let model = models.get_or_try_init("shared-model@1", || {
+                            model_loads.fetch_add(1, Ordering::SeqCst);
+                            Ok::<_, WorkerError>(42usize)
+                        })?;
+                        Ok::<_, WorkerError>(*model)
+                    },
+                )
+                .unwrap();
+            assert_eq!(handle.wait().unwrap(), 42);
+        }
+        assert_eq!(model_loads.load(Ordering::SeqCst), 1);
+
+        // Changing either source fingerprint or model version forms a new key;
+        // a restarted worker can resume only the missing key and converge on the
+        // same final result.
+        let v1 = submit("media-fingerprint-a@siglip2-1", JobPriority::Background, 8).unwrap();
+        assert_eq!(v1.wait().unwrap(), 8);
+        let changed = submit("media-fingerprint-b@siglip2-1", JobPriority::Background, 9).unwrap();
+        let upgraded =
+            submit("media-fingerprint-b@siglip2-2", JobPriority::Background, 10).unwrap();
+        assert_eq!(changed.wait().unwrap(), 9);
+        assert_eq!(upgraded.wait().unwrap(), 10);
+
+        worker.shutdown().unwrap();
+        assert_eq!(worker.active_jobs(), 0);
+        assert!(matches!(
+            submit("after-shutdown", JobPriority::Background, 11),
+            Err(WorkerError::Shutdown)
+        ));
+
+        // Admission is truly bounded even while pressure holds the worker.
+        let bounded_pause = opentake_media::ExportPause::new();
+        let bounded_guard = bounded_pause.guard();
+        let bounded = OrtWorker::spawn(bounded_pause, 2);
+        let first = bounded
+            .submit(
+                JobRequest::new(JobKind::Index, "m@1", "first", JobPriority::Background),
+                |_models, _cancel| Ok::<_, WorkerError>(1usize),
+            )
+            .unwrap();
+        std::thread::sleep(Duration::from_millis(25));
+        let second = bounded
+            .submit(
+                JobRequest::new(JobKind::Index, "m@1", "second", JobPriority::Background),
+                |_models, _cancel| Ok::<_, WorkerError>(2usize),
+            )
+            .unwrap();
+        assert_eq!(bounded.queued_jobs(), 2);
+        assert!(matches!(
+            bounded.submit(
+                JobRequest::new(JobKind::Index, "m@1", "third", JobPriority::Background),
+                |_models, _cancel| Ok::<_, WorkerError>(3usize),
+            ),
+            Err(WorkerError::QueueFull)
+        ));
+        drop(bounded_guard);
+        assert_eq!(first.wait().unwrap(), 1);
+        assert_eq!(second.wait().unwrap(), 2);
+        bounded.shutdown().unwrap();
+
+        // Four interactive jobs is the explicit starvation bound.
+        let fairness_pause = opentake_media::ExportPause::new();
+        let fairness_guard = fairness_pause.guard();
+        let fairness = OrtWorker::spawn(fairness_pause, 8);
+        let fairness_order = Arc::new(Mutex::new(Vec::new()));
+        let enqueue = |key: &'static str, priority, marker| {
+            let fairness_order = fairness_order.clone();
+            fairness
+                .submit(
+                    JobRequest::new(JobKind::Index, "m@1", key, priority),
+                    move |_models, _cancel| {
+                        fairness_order.lock().unwrap().push(marker);
+                        Ok::<_, WorkerError>(marker)
+                    },
+                )
+                .unwrap()
+        };
+        let low = enqueue("fair-low", JobPriority::Background, 0usize);
+        let highs = [1usize, 2, 3, 4, 5]
+            .into_iter()
+            .map(|marker| {
+                let key = match marker {
+                    1 => "fair-high-1",
+                    2 => "fair-high-2",
+                    3 => "fair-high-3",
+                    4 => "fair-high-4",
+                    _ => "fair-high-5",
+                };
+                enqueue(key, JobPriority::Interactive, marker)
+            })
+            .collect::<Vec<_>>();
+        drop(fairness_guard);
+        for high in &highs {
+            let _ = high.wait().unwrap();
+        }
+        assert_eq!(low.wait().unwrap(), 0);
+        assert_eq!(*fairness_order.lock().unwrap(), vec![1, 2, 3, 4, 0, 5]);
+        fairness.shutdown().unwrap();
+
+        let restarted = OrtWorker::spawn(pause, 1);
+        let resumed = restarted
+            .submit(
+                JobRequest::new(
+                    JobKind::Index,
+                    "siglip2@2",
+                    "media-fingerprint-b@siglip2-2",
+                    JobPriority::Background,
+                ),
+                |_models, _cancel| Ok::<_, WorkerError>(10usize),
+            )
+            .unwrap();
+        assert_eq!(resumed.wait().unwrap(), 10);
+        restarted.shutdown().unwrap();
+        assert_eq!(restarted.active_jobs(), 0);
+    }
+
     // --- pure DTO / merge / cap logic (no ort, no ffmpeg) ---
 
     #[test]
diff --git a/src-tauri/src/telemetry.rs b/src-tauri/src/telemetry.rs
new file mode 100644
index 00000000..eb481c5c
--- /dev/null
+++ b/src-tauri/src/telemetry.rs
@@ -0,0 +1,268 @@
+//! Explicit, privacy-bounded error telemetry initialization.
+//!
+//! No SDK client is created unless a non-empty, valid DSN is supplied by the
+//! packaged build or the current process environment. Event preprocessing drops
+//! request/user payloads and redacts paths and credential-shaped text.
+
+use std::borrow::Cow;
+use std::fmt;
+use std::sync::Arc;
+
+use sentry::protocol::{Event, Stacktrace};
+use sentry::types::Dsn;
+
+const ENV_DSN: &str = "OPENTAKE_SENTRY_DSN";
+const STANDARD_ENV_DSN: &str = "SENTRY_DSN";
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum TelemetrySource {
+    Packaged,
+    Environment,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum TelemetryInitStatus {
+    Disabled,
+    InvalidConfiguration,
+    StartFailed,
+    Started(TelemetrySource),
+}
+
+pub struct TelemetryOptions {
+    pub dsn: Dsn,
+    pub source: TelemetrySource,
+    pub send_default_pii: bool,
+    pub capture_failed_requests: bool,
+    pub traces_sample_rate: f32,
+}
+
+impl fmt::Debug for TelemetryOptions {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter
+            .debug_struct("TelemetryOptions")
+            .field("dsn", &"[REDACTED]")
+            .field("source", &self.source)
+            .field("send_default_pii", &self.send_default_pii)
+            .field("capture_failed_requests", &self.capture_failed_requests)
+            .field("traces_sample_rate", &self.traces_sample_rate)
+            .finish()
+    }
+}
+
+pub fn init_telemetry_with(
+    packaged_dsn: Option<&str>,
+    environment_dsn: Option<&str>,
+    start: impl FnOnce(&TelemetryOptions) -> Result<(), ()>,
+) -> TelemetryInitStatus {
+    let candidate = environment_dsn
+        .and_then(non_empty)
+        .map(|dsn| (dsn, TelemetrySource::Environment))
+        .or_else(|| {
+            packaged_dsn
+                .and_then(non_empty)
+                .map(|dsn| (dsn, TelemetrySource::Packaged))
+        });
+    let Some((raw_dsn, source)) = candidate else {
+        return TelemetryInitStatus::Disabled;
+    };
+    let Ok(dsn) = raw_dsn.parse::<Dsn>() else {
+        return TelemetryInitStatus::InvalidConfiguration;
+    };
+    let options = TelemetryOptions {
+        dsn,
+        source,
+        send_default_pii: false,
+        capture_failed_requests: false,
+        traces_sample_rate: 0.1,
+    };
+    if start(&options).is_err() {
+        TelemetryInitStatus::StartFailed
+    } else {
+        TelemetryInitStatus::Started(source)
+    }
+}
+
+fn non_empty(value: &str) -> Option<&str> {
+    let value = value.trim();
+    (!value.is_empty()).then_some(value)
+}
+
+pub struct TelemetryRuntime {
+    _guard: Option<sentry::ClientInitGuard>,
+    pub status: TelemetryInitStatus,
+}
+
+pub fn init_telemetry() -> TelemetryRuntime {
+    let environment_dsn = std::env::var(ENV_DSN)
+        .ok()
+        .and_then(|value| non_empty(&value).map(str::to_owned))
+        .or_else(|| {
+            std::env::var(STANDARD_ENV_DSN)
+                .ok()
+                .and_then(|value| non_empty(&value).map(str::to_owned))
+        });
+    let packaged_dsn = option_env!("OPENTAKE_PACKAGED_SENTRY_DSN");
+    let mut guard = None;
+    let status = init_telemetry_with(packaged_dsn, environment_dsn.as_deref(), |options| {
+        guard = Some(start_sentry(options));
+        Ok(())
+    });
+    TelemetryRuntime {
+        _guard: guard,
+        status,
+    }
+}
+
+fn start_sentry(options: &TelemetryOptions) -> sentry::ClientInitGuard {
+    let release = format!(
+        "opentake@{}+{}",
+        env!("CARGO_PKG_VERSION"),
+        option_env!("OPENTAKE_BUILD_NUMBER").unwrap_or("?")
+    );
+    let environment = if cfg!(debug_assertions) {
+        "development"
+    } else {
+        "production"
+    };
+    let mut client_options =
+        sentry::ClientOptions::default().traces_sample_rate(options.traces_sample_rate);
+    client_options.dsn = Some(options.dsn.clone());
+    client_options.release = Some(Cow::Owned(release));
+    client_options.environment = Some(Cow::Borrowed(environment));
+    client_options.attach_stacktrace = true;
+    client_options.send_default_pii = options.send_default_pii;
+    client_options.max_request_body_size = sentry::MaxRequestBodySize::None;
+    client_options.enable_logs = false;
+    client_options.enable_metrics = false;
+    client_options.auto_session_tracking = false;
+    client_options.before_send = Some(Arc::new(|event| Some(scrub_event(event))));
+    client_options.before_breadcrumb = Some(Arc::new(|mut breadcrumb| {
+        breadcrumb.message = breadcrumb
+            .message
+            .map(|value| redact_sensitive_text(&value));
+        breadcrumb.data.clear();
+        Some(breadcrumb)
+    }));
+    sentry::init(client_options)
+}
+
+fn scrub_event(mut event: Event<'static>) -> Event<'static> {
+    event.user = None;
+    event.request = None;
+    event.server_name = None;
+    event.extra.clear();
+    event.message = event.message.map(|value| redact_sensitive_text(&value));
+    event.culprit = event.culprit.map(|value| redact_sensitive_text(&value));
+    event.transaction = event.transaction.map(|value| redact_sensitive_text(&value));
+    for value in event.tags.values_mut() {
+        *value = redact_sensitive_text(value);
+    }
+    if let Some(entry) = &mut event.logentry {
+        entry.message = redact_sensitive_text(&entry.message);
+        entry.params.clear();
+    }
+    for breadcrumb in &mut event.breadcrumbs {
+        breadcrumb.message = breadcrumb
+            .message
+            .take()
+            .map(|value| redact_sensitive_text(&value));
+        breadcrumb.data.clear();
+    }
+    for exception in &mut event.exception {
+        exception.value = exception
+            .value
+            .take()
+            .map(|value| redact_sensitive_text(&value));
+        scrub_stacktrace(exception.stacktrace.as_mut());
+        scrub_stacktrace(exception.raw_stacktrace.as_mut());
+    }
+    scrub_stacktrace(event.stacktrace.as_mut());
+    for thread in &mut event.threads {
+        thread.name = thread
+            .name
+            .take()
+            .map(|value| redact_sensitive_text(&value));
+        scrub_stacktrace(thread.stacktrace.as_mut());
+        scrub_stacktrace(thread.raw_stacktrace.as_mut());
+    }
+    event
+}
+
+fn scrub_stacktrace(stacktrace: Option<&mut Stacktrace>) {
+    let Some(stacktrace) = stacktrace else {
+        return;
+    };
+    for frame in &mut stacktrace.frames {
+        frame.abs_path = None;
+        frame.package = frame
+            .package
+            .take()
+            .map(|value| redact_sensitive_text(&value));
+        frame.pre_context.clear();
+        frame.context_line = None;
+        frame.post_context.clear();
+        frame.vars.clear();
+    }
+    stacktrace.registers.clear();
+}
+
+pub fn redact_sensitive_text(input: &str) -> String {
+    let mut redact_next = false;
+    input
+        .split_whitespace()
+        .map(|word| {
+            if redact_next {
+                redact_next = false;
+                return "[REDACTED]".to_owned();
+            }
+            let trimmed = word.trim_matches(|character: char| {
+                matches!(character, '"' | '\'' | '(' | ')' | '[' | ']' | ',' | ';')
+            });
+            let lower = trimmed.to_ascii_lowercase();
+            if lower == "bearer" {
+                redact_next = true;
+                return word.to_owned();
+            }
+            if is_sensitive_assignment(&lower) {
+                return format!(
+                    "{}=[REDACTED]",
+                    trimmed.split(['=', ':']).next().unwrap_or("secret")
+                );
+            }
+            if looks_like_private_path(trimmed) {
+                return "[PATH]".to_owned();
+            }
+            word.to_owned()
+        })
+        .collect::<Vec<_>>()
+        .join(" ")
+}
+
+fn is_sensitive_assignment(lower: &str) -> bool {
+    ["api_key", "apikey", "token", "password", "passwd", "secret"]
+        .iter()
+        .any(|key| lower.starts_with(&format!("{key}=")) || lower.starts_with(&format!("{key}:")))
+}
+
+fn looks_like_private_path(value: &str) -> bool {
+    value.starts_with('/')
+        || value.starts_with("~/")
+        || value.contains("/Users/")
+        || value.contains("/home/")
+        || (value.len() > 3
+            && value.as_bytes()[1] == b':'
+            && matches!(value.as_bytes()[2], b'\\' | b'/'))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::redact_sensitive_text;
+
+    #[test]
+    fn redacts_unix_windows_and_credential_shapes() {
+        let text = redact_sensitive_text(
+            r#"/home/alice/project C:\Users\alice\project password:hunter2 Bearer token-value"#,
+        );
+        assert_eq!(text, "[PATH] [PATH] password=[REDACTED] Bearer [REDACTED]");
+    }
+}
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index e0182a77..8bacee3d 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "OpenTake",
-  "version": "1.0.0",
+  "version": "1.0.0-beta.1",
   "identifier": "com.opentake.desktop",
   "build": {
     "frontendDist": "../web/dist",
@@ -35,18 +35,55 @@
       }
     ],
     "security": {
-      "csp": null,
+      "csp": {
+        "default-src": "'self'",
+        "base-uri": "'self'",
+        "connect-src": "'self' ipc: http://ipc.localhost http://127.0.0.1:*",
+        "font-src": "'self' data:",
+        "frame-ancestors": "'none'",
+        "img-src": "'self' asset: http://asset.localhost blob: data:",
+        "media-src": "'self' asset: http://asset.localhost blob: data:",
+        "object-src": "'none'",
+        "script-src": "'self'",
+        "style-src": "'self' 'unsafe-inline'"
+      },
+      "devCsp": {
+        "default-src": "'self'",
+        "base-uri": "'self'",
+        "connect-src": "'self' ipc: http://ipc.localhost http://127.0.0.1:* ws://127.0.0.1:* ws://localhost:*",
+        "font-src": "'self' data:",
+        "frame-ancestors": "'none'",
+        "img-src": "'self' asset: http://asset.localhost blob: data:",
+        "media-src": "'self' asset: http://asset.localhost blob: data:",
+        "object-src": "'none'",
+        "script-src": "'self'",
+        "style-src": "'self' 'unsafe-inline'"
+      },
       "assetProtocol": {
         "enable": true,
-        "scope": [
-          "**"
-        ]
+        "scope": {
+          "allow": [
+            "$APPCACHE/**/*",
+            "$APPDATA/OpenTake/Library/**/*",
+            "$RESOURCE/**/*"
+          ],
+          "deny": [
+            "$HOME/.ssh/**/*",
+            "$HOME/.gnupg/**/*",
+            "$HOME/.aws/**/*"
+          ]
+        }
       }
     }
   },
   "bundle": {
     "active": true,
     "targets": "all",
+    "resources": [
+      "../LICENSE",
+      "../NOTICE",
+      "resources/ffmpeg"
+    ],
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",
@@ -56,6 +93,11 @@
     ],
     "macOS": {
       "minimumSystemVersion": "11.0"
+    },
+    "windows": {
+      "wix": {
+        "version": "1.0.0.1"
+      }
     }
   }
 }
diff --git a/src-tauri/tauri.macos.conf.json b/src-tauri/tauri.macos.conf.json
new file mode 100644
index 00000000..d4d9db33
--- /dev/null
+++ b/src-tauri/tauri.macos.conf.json
@@ -0,0 +1,8 @@
+{
+  "bundle": {
+    "externalBin": [
+      "binaries/ffmpeg",
+      "binaries/ffprobe"
+    ]
+  }
+}
diff --git a/src-tauri/tauri.windows.conf.json b/src-tauri/tauri.windows.conf.json
new file mode 100644
index 00000000..c0da073b
--- /dev/null
+++ b/src-tauri/tauri.windows.conf.json
@@ -0,0 +1,19 @@
+{
+  "bundle": {
+    "externalBin": [
+      "binaries/ffmpeg",
+      "binaries/ffprobe"
+    ],
+    "resources": {
+      "../LICENSE": "LICENSE",
+      "../NOTICE": "NOTICE",
+      "resources/ffmpeg": "ffmpeg"
+    },
+    "windows": {
+      "webviewInstallMode": {
+        "type": "offlineInstaller",
+        "silent": true
+      }
+    }
+  }
+}
diff --git a/src-tauri/tests/bundle_export_integration.rs b/src-tauri/tests/bundle_export_integration.rs
index 2bcdcd74..888a5cbd 100644
--- a/src-tauri/tests/bundle_export_integration.rs
+++ b/src-tauri/tests/bundle_export_integration.rs
@@ -39,6 +39,8 @@ fn external_entry(id: &str, name: &str, absolute_path: &str) -> MediaManifestEnt
         source_height: Some(240),
         source_fps: Some(30.0),
         has_audio: Some(false),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/src-tauri/tests/export_integration.rs b/src-tauri/tests/export_integration.rs
index 69b07a18..89e1003a 100644
--- a/src-tauri/tests/export_integration.rs
+++ b/src-tauri/tests/export_integration.rs
@@ -14,7 +14,8 @@ use std::path::Path;
 use std::process::Command;
 
 use opentake_domain::{
-    Clip, ClipType, MediaManifest, MediaManifestEntry, MediaSource, Timeline, Track,
+    Clip, ClipType, MediaColorMetadata, MediaManifest, MediaManifestEntry, MediaSource, Timeline,
+    Track,
 };
 
 /// True when both ffmpeg and ffprobe are on PATH.
@@ -54,6 +55,62 @@ fn make_video(path: &Path, w: u32, h: u32, fps: u32, frames: u32) -> bool {
         .unwrap_or(false)
 }
 
+/// Generate a tagged Main10/PQ fixture. The x265 bitstream parameters are
+/// intentional: container-only tags are not sufficient to exercise the HDR
+/// decoder path used by the packaged application.
+fn make_hdr_video(path: &Path, w: u32, h: u32, fps: u32, frames: u32) -> bool {
+    Command::new("ffmpeg")
+        .args([
+            "-v",
+            "error",
+            "-f",
+            "lavfi",
+            "-i",
+            &format!("testsrc2=size={w}x{h}:rate={fps}"),
+            "-frames:v",
+            &frames.to_string(),
+            "-vf",
+            "format=yuv420p10le",
+            "-c:v",
+            "libx265",
+            "-preset",
+            "ultrafast",
+            "-x265-params",
+            "log-level=error:hdr-opt=1:repeat-headers=1:colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc",
+            "-color_primaries",
+            "bt2020",
+            "-color_trc",
+            "smpte2084",
+            "-colorspace",
+            "bt2020nc",
+            "-y",
+        ])
+        .arg(path)
+        .status()
+        .map(|status| status.success())
+        .unwrap_or(false)
+}
+
+fn decoded_rgb_range(path: &Path) -> Option<(u8, u8)> {
+    let output = Command::new("ffmpeg")
+        .args(["-v", "error", "-i"])
+        .arg(path)
+        .args(["-frames:v", "1", "-pix_fmt", "rgb24", "-f", "rawvideo", "-"])
+        .output()
+        .ok()?;
+    if !output.status.success() || output.stdout.is_empty() {
+        return None;
+    }
+    Some(
+        output
+            .stdout
+            .into_iter()
+            .fold((u8::MAX, u8::MIN), |(minimum, maximum), value| {
+                (minimum.min(value), maximum.max(value))
+            }),
+    )
+}
+
 /// Generate an N-frame test video *with* a sine audio track. Returns false on
 /// failure (→ skip).
 fn make_video_with_audio(path: &Path, w: u32, h: u32, fps: u32, frames: u32) -> bool {
@@ -234,6 +291,8 @@ fn build_manifest_with_audio(
         source_height: Some(src_h),
         source_fps: Some(src_fps),
         has_audio: Some(has_audio),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
@@ -322,6 +381,69 @@ fn export_full_timeline_produces_playable_mp4() {
     );
 }
 
+/// Regression for the packaged HDR export producing a valid-looking but fully
+/// black H.264 file. The packaged FFmpeg and the developer FFmpeg can expose
+/// different HDR filter backends, so this test is also run with
+/// `OPENTAKE_FFMPEG`/`OPENTAKE_FFPROBE` pointed at the bundled sidecars.
+#[test]
+fn export_hdr_timeline_preserves_picture_contrast_and_delivers_bt709() {
+    if !ffmpeg_ready() {
+        eprintln!("skip: ffmpeg/ffprobe not available");
+        return;
+    }
+
+    let dir = tempfile::tempdir().unwrap();
+    let src = dir.path().join("hdr-pq.mp4");
+    let out = dir.path().join("hdr-delivery.mp4");
+    let (sw, sh, sfps, frames) = (160, 90, 12, 12);
+    if !make_hdr_video(&src, sw, sh, sfps, frames) {
+        eprintln!("skip: could not generate HDR fixture media");
+        return;
+    }
+
+    let timeline = build_timeline(frames as i32, sw as i32, sh as i32, sfps as f64);
+    let mut manifest = build_manifest(&src, sw as i32, sh as i32, sfps as f64);
+    manifest.entries[0].color = Some(MediaColorMetadata {
+        primaries: Some("bt2020".into()),
+        transfer: Some("smpte2084".into()),
+        matrix: Some("bt2020nc".into()),
+        range: Some("tv".into()),
+    });
+
+    let request = ExportRequest {
+        out_path: out.to_string_lossy().into_owned(),
+        codec: Default::default(),
+        quality: ExportQuality::P720,
+    };
+    let summary = match run_export(&timeline, &manifest, &None, &request) {
+        Ok(summary) => summary,
+        Err(error) if error.contains("no GPU device") => {
+            eprintln!("skip: no GPU adapter available ({error})");
+            return;
+        }
+        Err(error) => panic!("HDR export failed: {error}"),
+    };
+
+    assert_summary_matches_real_probe(&summary, &out);
+    assert_eq!(
+        probe_field(&out, "stream=color_primaries").as_deref(),
+        Some("bt709")
+    );
+    assert_eq!(
+        probe_field(&out, "stream=color_transfer").as_deref(),
+        Some("bt709")
+    );
+    assert_eq!(
+        probe_field(&out, "stream=color_space").as_deref(),
+        Some("bt709")
+    );
+    let (minimum, maximum) = decoded_rgb_range(&out).expect("decode exported first frame");
+    assert!(
+        maximum.saturating_sub(minimum) > 32,
+        "tone-mapped export must retain picture contrast, got RGB range {minimum}..={maximum}"
+    );
+}
+
 /// Regression for "export video crashes the app": the render device was created
 /// with `downlevel_defaults()` limits (max_texture_dimension_2d = 2048), so a
 /// full-resolution export above 2048px (2K / 4K) blew up inside
diff --git a/src-tauri/tests/export_probe.rs b/src-tauri/tests/export_probe.rs
index ff601d48..6e3b594f 100644
--- a/src-tauri/tests/export_probe.rs
+++ b/src-tauri/tests/export_probe.rs
@@ -80,6 +80,8 @@ fn probe_timeline() -> (Timeline, MediaManifest) {
         source_height: Some(360),
         source_fps: Some(30.0),
         has_audio: Some(false),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/src-tauri/tests/feedback.rs b/src-tauri/tests/feedback.rs
new file mode 100644
index 00000000..9b3a3e20
--- /dev/null
+++ b/src-tauri/tests/feedback.rs
@@ -0,0 +1,50 @@
+use opentake_tauri_lib::feedback::{FeedbackDraft, FeedbackSubmission};
+
+#[test]
+fn submission_includes_app_and_os_version() {
+    let submission = FeedbackSubmission::from_draft_with_versions(
+        FeedbackDraft {
+            message: "  Playback stalls after a split.  ".into(),
+            email: Some("editor@example.com".into()),
+            may_contact: true,
+            screenshot_png_base64: Some("private-image-data".into()),
+        },
+        Some("1.0.0"),
+        Some("42"),
+        Some("15.5.0"),
+    )
+    .expect("valid feedback should produce a submission");
+
+    let value = serde_json::to_value(&submission).expect("submission should serialize");
+    assert_eq!(value["message"], "Playback stalls after a split.");
+    assert_eq!(value["email"], "editor@example.com");
+    assert_eq!(value["mayContact"], true);
+    assert_eq!(value["screenshotPngBase64"], "private-image-data");
+    assert_eq!(value["appVersion"], "1.0.0 (42)");
+    assert_eq!(value["osVersion"], "15.5.0");
+
+    let fallback = FeedbackSubmission::from_draft_with_versions(
+        FeedbackDraft {
+            message: "Version metadata is unavailable".into(),
+            email: None,
+            may_contact: true,
+            screenshot_png_base64: None,
+        },
+        None,
+        Some(""),
+        None,
+    )
+    .expect("missing version metadata must use safe fallbacks");
+    let fallback_value =
+        serde_json::to_value(&fallback).expect("fallback submission should serialize");
+    assert_eq!(fallback_value["appVersion"], "? (?)");
+    assert_eq!(fallback_value["osVersion"], "?.?.?");
+    assert_eq!(fallback_value["mayContact"], false);
+    assert!(fallback_value.get("email").is_none());
+    assert!(fallback_value.get("screenshotPngBase64").is_none());
+
+    let debug = format!("{submission:?}");
+    assert!(!debug.contains("Playback stalls"));
+    assert!(!debug.contains("editor@example.com"));
+    assert!(!debug.contains("private-image-data"));
+}
diff --git a/src-tauri/tests/motion_command.rs b/src-tauri/tests/motion_command.rs
new file mode 100644
index 00000000..5545bec7
--- /dev/null
+++ b/src-tauri/tests/motion_command.rs
@@ -0,0 +1,337 @@
+use std::sync::{Arc, Mutex};
+
+use opentake_agent::mcp::motion::{
+    AddMotionRequest, EditMotionRequest, MotionBridge, MotionBridgeErrorKind, MotionSourceRequest,
+};
+use opentake_core::{AppCore, EditCommand};
+use opentake_domain::{GenerationJobStatus, MediaResolver};
+use opentake_tauri_lib::motion::{MotionProgress, TauriMotionBridge};
+use opentake_tauri_lib::{
+    export::{run_export, ExportQuality, ExportRequest},
+    render::{composite_timeline_frame, RenderState},
+};
+
+#[test]
+fn sandbox_progress_cancel_validated_mp4_result() {
+    let root = tempfile::tempdir().unwrap();
+    let bundle = root.path().join("Motion.opentake");
+    let core = AppCore::new();
+    core.apply(EditCommand::SetTimelineSettings {
+        fps: 10,
+        width: 64,
+        height: 36,
+    })
+    .unwrap();
+    core.save_project(Some(bundle.clone())).unwrap();
+
+    let phases = Arc::new(Mutex::new(Vec::new()));
+    let recorded = Arc::clone(&phases);
+    let bridge = TauriMotionBridge::new(core.clone(), root.path().join("cache"))
+        .with_progress_callback(Arc::new(move |phase| recorded.lock().unwrap().push(phase)));
+    if !bridge.can_render_motion() {
+        eprintln!("SKIP: native Chromium/FFmpeg motion capability is unavailable");
+        return;
+    }
+
+    let added = bridge
+        .add(
+            AddMotionRequest {
+                source: MotionSourceRequest::Template {
+                    template_id: "title-card".into(),
+                    params: serde_json::from_value(serde_json::json!({
+                        "title": "Deterministic",
+                        "subtitle": "OpenTake motion",
+                        "accent": "#FF3366"
+                    }))
+                    .unwrap(),
+                },
+                start_frame: 2,
+                duration_frames: 4,
+                transparent: false,
+                track_index: None,
+            },
+            &opentake_media::MediaCancelToken::new(),
+        )
+        .unwrap();
+    assert_eq!(
+        *phases.lock().unwrap(),
+        vec![
+            MotionProgress::Validating,
+            MotionProgress::Rendering,
+            MotionProgress::Encoding,
+            MotionProgress::Committing,
+            MotionProgress::Complete,
+        ]
+    );
+
+    let snapshot = core.runtime_snapshot();
+    let clip = snapshot
+        .timeline
+        .tracks
+        .iter()
+        .flat_map(|track| &track.clips)
+        .find(|clip| clip.id == added.clip_id)
+        .unwrap();
+    assert_eq!(clip.start_frame, 2);
+    assert_eq!(clip.duration_frames, 4);
+    assert_eq!(clip.media_ref, added.asset_id);
+    let entry = snapshot
+        .media
+        .entries
+        .iter()
+        .find(|entry| entry.id == added.asset_id)
+        .unwrap();
+    let provenance = entry.generation_input.as_ref().unwrap();
+    assert_eq!(provenance.provider.as_deref(), Some("opentake-motion"));
+    assert_eq!(provenance.status, Some(GenerationJobStatus::Ready));
+    let path = MediaResolver::new(&snapshot.media, snapshot.project_dir.as_deref())
+        .expected_path(&entry.id)
+        .unwrap();
+    let probe = opentake_media::probe(&path).unwrap();
+    assert!(probe.has_video);
+    assert_eq!((probe.width, probe.height), (Some(64), Some(36)));
+    assert!((probe.duration_secs - 0.4).abs() <= 0.15);
+    let decode = |time_secs| {
+        opentake_media::decode_frame_at(
+            &path,
+            &opentake_media::FrameRequest {
+                time_secs,
+                max_size: (64, 36),
+                tolerance_secs: 0.0,
+                apply_rotation: true,
+            },
+        )
+        .unwrap()
+        .1
+    };
+    let first = decode(0.0);
+    let animated = decode(0.3);
+    assert_ne!(
+        first.rgba, animated.rgba,
+        "Motion Canvas template must change pixels across its deterministic timeline"
+    );
+    let distinct_colors = animated
+        .rgba
+        .chunks_exact(4)
+        .map(|pixel| [pixel[0], pixel[1], pixel[2]])
+        .collect::<std::collections::HashSet<_>>();
+    assert!(
+        distinct_colors.len() > 4,
+        "rendered template must contain real card/text/accent pixels, not a solid placeholder"
+    );
+    assert_eq!(added.output.renderer, "motion-canvas");
+    assert_eq!(added.output.renderer_version, "3.17.2");
+    assert_eq!((added.output.width, added.output.height), (64, 36));
+    assert_eq!(added.output.duration_frames, 4);
+    assert_eq!(added.output.content_hash, added.content_hash);
+
+    let preview_state = RenderState::new();
+    let preview_cancel = opentake_media::MediaCancelToken::new();
+    let preview_before = composite_timeline_frame(
+        &snapshot.timeline,
+        &snapshot.media,
+        &snapshot.project_dir,
+        &preview_state,
+        0,
+        64,
+        &preview_cancel,
+    );
+    let preview_motion = composite_timeline_frame(
+        &snapshot.timeline,
+        &snapshot.media,
+        &snapshot.project_dir,
+        &preview_state,
+        3,
+        64,
+        &preview_cancel,
+    );
+    match (preview_before, preview_motion) {
+        (Ok(before), Ok(motion)) => {
+            assert_ne!(
+                before.rgba, motion.rgba,
+                "preview composite must contain the generated clip"
+            );
+            assert!(
+                motion
+                    .rgba
+                    .chunks_exact(4)
+                    .map(|pixel| [pixel[0], pixel[1], pixel[2]])
+                    .collect::<std::collections::HashSet<_>>()
+                    .len()
+                    > 4,
+                "preview composite must retain the generated card/text/accent pixels"
+            );
+
+            let exported = root.path().join("motion-export.mp4");
+            let request = ExportRequest {
+                out_path: exported.to_string_lossy().into_owned(),
+                codec: Default::default(),
+                quality: ExportQuality::P720,
+            };
+            let summary = run_export(
+                &snapshot.timeline,
+                &snapshot.media,
+                &snapshot.project_dir,
+                &request,
+            )
+            .expect("generated motion timeline must export");
+            assert_eq!(summary.frame_count, 6);
+            let exported_before = opentake_media::decode_frame_at(
+                &exported,
+                &opentake_media::FrameRequest {
+                    time_secs: 0.0,
+                    max_size: (64, 36),
+                    tolerance_secs: 0.0,
+                    apply_rotation: true,
+                },
+            )
+            .unwrap()
+            .1;
+            let exported_motion = opentake_media::decode_frame_at(
+                &exported,
+                &opentake_media::FrameRequest {
+                    time_secs: 0.3,
+                    max_size: (64, 36),
+                    tolerance_secs: 0.0,
+                    apply_rotation: true,
+                },
+            )
+            .unwrap()
+            .1;
+            assert_ne!(
+                exported_before.rgba, exported_motion.rgba,
+                "export_video output must contain the generated motion clip"
+            );
+        }
+        (Err(error), _) | (_, Err(error)) if error.contains("no GPU device") => {
+            eprintln!("SKIP composite/export acceptance: {error}");
+        }
+        (Err(error), _) | (_, Err(error)) => panic!("motion composite failed: {error}"),
+    }
+
+    let duplicate = bridge
+        .add(
+            AddMotionRequest {
+                source: MotionSourceRequest::Template {
+                    template_id: "title-card".into(),
+                    params: serde_json::from_value(serde_json::json!({
+                        "title": "Deterministic",
+                        "subtitle": "OpenTake motion",
+                        "accent": "#FF3366"
+                    }))
+                    .unwrap(),
+                },
+                start_frame: 20,
+                duration_frames: 4,
+                transparent: false,
+                track_index: None,
+            },
+            &opentake_media::MediaCancelToken::new(),
+        )
+        .unwrap();
+    assert_eq!(duplicate.content_hash, added.content_hash);
+    assert_eq!(duplicate.output, added.output);
+    let duplicate_snapshot = core.runtime_snapshot();
+    let duplicate_entry = duplicate_snapshot
+        .media
+        .entries
+        .iter()
+        .find(|entry| entry.id == duplicate.asset_id)
+        .unwrap();
+    let duplicate_path = MediaResolver::new(
+        &duplicate_snapshot.media,
+        duplicate_snapshot.project_dir.as_deref(),
+    )
+    .expected_path(&duplicate_entry.id)
+    .unwrap();
+    let duplicate_frame = opentake_media::decode_frame_at(
+        &duplicate_path,
+        &opentake_media::FrameRequest {
+            time_secs: 0.3,
+            max_size: (64, 36),
+            tolerance_secs: 0.0,
+            apply_rotation: true,
+        },
+    )
+    .unwrap()
+    .1;
+    assert_eq!(duplicate_frame.rgba, animated.rgba);
+    core.undo().unwrap();
+
+    phases.lock().unwrap().clear();
+    let edited = bridge
+        .edit(
+            EditMotionRequest {
+                clip_id: added.clip_id.clone(),
+                code: None,
+                params: Some(
+                    serde_json::from_value(serde_json::json!({"title": "Updated"})).unwrap(),
+                ),
+            },
+            &opentake_media::MediaCancelToken::new(),
+        )
+        .unwrap();
+    assert_eq!(edited.clip_id, added.clip_id);
+    assert_ne!(edited.asset_id, added.asset_id);
+    assert_eq!(core.media().entries.len(), 2);
+    assert_eq!(
+        core.get_timeline().timeline.tracks[0].clips[0].media_ref,
+        edited.asset_id
+    );
+
+    core.undo().unwrap();
+    assert_eq!(core.media().entries.len(), 1);
+    assert_eq!(
+        core.get_timeline().timeline.tracks[0].clips[0].media_ref,
+        added.asset_id
+    );
+    core.save_project(None).unwrap();
+
+    let before_cancel = core.runtime_snapshot();
+    let cancelled = opentake_media::MediaCancelToken::new();
+    cancelled.cancel();
+    let error = bridge
+        .add(
+            AddMotionRequest {
+                source: MotionSourceRequest::Template {
+                    template_id: "title-card".into(),
+                    params: Default::default(),
+                },
+                start_frame: 0,
+                duration_frames: 2,
+                transparent: false,
+                track_index: None,
+            },
+            &cancelled,
+        )
+        .unwrap_err();
+    assert_eq!(error.kind, MotionBridgeErrorKind::Cancelled);
+    assert_eq!(core.runtime_snapshot().timeline, before_cancel.timeline);
+    assert_eq!(core.runtime_snapshot().media, before_cancel.media);
+
+    let error = bridge
+        .add(
+            AddMotionRequest {
+                source: MotionSourceRequest::Code(
+                    r#"<html><body><img src="https://example.com/no.png"></body></html>"#.into(),
+                ),
+                start_frame: 0,
+                duration_frames: 2,
+                transparent: false,
+                track_index: None,
+            },
+            &opentake_media::MediaCancelToken::new(),
+        )
+        .unwrap_err();
+    assert_eq!(error.kind, MotionBridgeErrorKind::InvalidArguments);
+    assert_eq!(core.runtime_snapshot().timeline, before_cancel.timeline);
+    assert_eq!(core.runtime_snapshot().media, before_cancel.media);
+
+    let reopened = AppCore::new();
+    reopened.open_project(bundle).unwrap();
+    assert_eq!(reopened.media(), core.media());
+    assert_eq!(
+        reopened.get_timeline().timeline,
+        core.get_timeline().timeline
+    );
+}
diff --git a/src-tauri/tests/playback_integration.rs b/src-tauri/tests/playback_integration.rs
index 67b7088e..d1d6cfa1 100644
--- a/src-tauri/tests/playback_integration.rs
+++ b/src-tauri/tests/playback_integration.rs
@@ -118,6 +118,8 @@ fn external_entry(id: &str, path: &Path, w: i32, h: i32, fps: f64) -> MediaManif
         source_height: Some(h),
         source_fps: Some(fps),
         has_audio: Some(false),
+        color: None,
+        proxy: None,
         folder_id: None,
         cached_remote_url: None,
         cached_remote_url_expires_at: None,
diff --git a/src-tauri/tests/playback_probe.rs b/src-tauri/tests/playback_probe.rs
index 7f4bab23..56b2f691 100644
--- a/src-tauri/tests/playback_probe.rs
+++ b/src-tauri/tests/playback_probe.rs
@@ -199,7 +199,13 @@ fn probe_realtime_playback_with_audio_or_safe_fallback() {
     tl.tracks.push(track);
 
     let mut media = HashMap::new();
-    media.insert("m-1".to_string(), MediaInfo { path: src.into() });
+    media.insert(
+        "m-1".to_string(),
+        MediaInfo {
+            path: src.into(),
+            straight_alpha: false,
+        },
+    );
     let mut sizes = HashMap::new();
     sizes.insert("m-1".to_string(), (1584u32, 1080u32));
 
@@ -280,7 +286,13 @@ fn probe_main10_playback_has_no_black_or_green_frames() {
     timeline.tracks.push(track);
 
     let mut media = HashMap::new();
-    media.insert("m-1".to_string(), MediaInfo { path: src });
+    media.insert(
+        "m-1".to_string(),
+        MediaInfo {
+            path: src,
+            straight_alpha: false,
+        },
+    );
     let mut sizes = HashMap::new();
     sizes.insert("m-1".to_string(), source_size);
 
@@ -358,7 +370,13 @@ fn probe_prores_playback() {
     tl.tracks.push(track);
 
     let mut media = HashMap::new();
-    media.insert("m-1".to_string(), MediaInfo { path: src });
+    media.insert(
+        "m-1".to_string(),
+        MediaInfo {
+            path: src,
+            straight_alpha: false,
+        },
+    );
     let mut sizes = HashMap::new();
     sizes.insert("m-1".to_string(), (1280u32, 720u32));
 
@@ -434,7 +452,13 @@ fn probe_color_grade_visible_in_playback() {
     tl.tracks.push(track);
 
     let mut media = HashMap::new();
-    media.insert("m-1".to_string(), MediaInfo { path: src });
+    media.insert(
+        "m-1".to_string(),
+        MediaInfo {
+            path: src,
+            straight_alpha: false,
+        },
+    );
     let mut sizes = HashMap::new();
     sizes.insert("m-1".to_string(), (640u32, 360u32));
 
diff --git a/src-tauri/tests/security_config.rs b/src-tauri/tests/security_config.rs
new file mode 100644
index 00000000..cb0037bf
--- /dev/null
+++ b/src-tauri/tests/security_config.rs
@@ -0,0 +1,194 @@
+use serde_json::Value;
+
+fn config() -> Value {
+    serde_json::from_str(include_str!("../tauri.conf.json")).expect("tauri.conf.json must parse")
+}
+
+fn windows_config() -> Value {
+    serde_json::from_str(include_str!("../tauri.windows.conf.json"))
+        .expect("tauri.windows.conf.json must parse")
+}
+
+#[test]
+fn packaged_webview_csp_is_explicit_and_local_only() {
+    let config = config();
+    let csp = config["app"]["security"]["csp"]
+        .as_object()
+        .expect("packaged WebView CSP must be enabled");
+
+    assert_eq!(
+        csp.get("default-src").and_then(Value::as_str),
+        Some("'self'")
+    );
+    assert_eq!(
+        csp.get("object-src").and_then(Value::as_str),
+        Some("'none'")
+    );
+    assert_eq!(
+        csp.get("frame-ancestors").and_then(Value::as_str),
+        Some("'none'")
+    );
+
+    let connect = csp
+        .get("connect-src")
+        .and_then(Value::as_str)
+        .expect("connect-src must be explicit");
+    assert!(connect.contains("http://127.0.0.1:*"));
+    assert!(connect.contains("ipc:"));
+    assert!(!connect.contains("https:"));
+    assert!(!connect.contains("http://*"));
+    assert!(!connect.contains("ws:"));
+    assert!(!connect.contains("ws://*"));
+
+    for directive in ["img-src", "media-src"] {
+        let value = csp
+            .get(directive)
+            .and_then(Value::as_str)
+            .unwrap_or_else(|| panic!("{directive} must be explicit"));
+        assert!(value.contains("asset:"));
+        assert!(value.contains("http://asset.localhost"));
+        assert!(!value.contains("https:"));
+        assert!(!value.contains('*'));
+    }
+}
+
+#[test]
+fn packaged_asset_scope_has_no_global_or_home_wildcard() {
+    let config = config();
+    let scope = config["app"]["security"]["assetProtocol"]["scope"]
+        .as_object()
+        .expect("asset scope must use explicit allow/deny form");
+    let allowed = scope["allow"]
+        .as_array()
+        .expect("asset allow scope must be an array")
+        .iter()
+        .map(|value| value.as_str().expect("asset scope entry must be text"))
+        .collect::<Vec<_>>();
+
+    assert_eq!(
+        allowed,
+        vec![
+            "$APPCACHE/**/*",
+            "$APPDATA/OpenTake/Library/**/*",
+            "$RESOURCE/**/*"
+        ]
+    );
+    assert!(!allowed
+        .iter()
+        .any(|entry| { matches!(*entry, "**" | "**/*" | "$HOME/**" | "$HOME/**/*") }));
+
+    let denied = scope["deny"]
+        .as_array()
+        .expect("sensitive-home deny scope must be present")
+        .iter()
+        .map(|value| value.as_str().expect("deny scope entry must be text"))
+        .collect::<Vec<_>>();
+    assert!(denied.contains(&"$HOME/.ssh/**/*"));
+    assert!(denied.contains(&"$HOME/.gnupg/**/*"));
+    assert!(denied.contains(&"$HOME/.aws/**/*"));
+}
+
+#[test]
+fn main_window_capability_exposes_no_shell_or_filesystem_commands() {
+    let capability: Value = serde_json::from_str(include_str!("../capabilities/default.json"))
+        .expect("default capability must parse");
+    let permissions = capability["permissions"]
+        .as_array()
+        .expect("permissions must be an array")
+        .iter()
+        .map(|value| value.as_str().expect("permission must be a string"))
+        .collect::<Vec<_>>();
+
+    assert!(permissions.iter().all(|permission| {
+        !permission.starts_with("shell:")
+            && !permission.starts_with("fs:")
+            && !permission.starts_with("http:")
+            && !permission.starts_with("process:")
+    }));
+}
+
+#[test]
+fn dialog_asset_grants_are_persisted_after_fs_initialization() {
+    let manifest = include_str!("../Cargo.toml");
+    assert!(manifest.contains("tauri-plugin-fs = \"2\""));
+    assert!(manifest.contains(
+        "tauri-plugin-persisted-scope = { version = \"2\", features = [\"protocol-asset\"] }"
+    ));
+
+    let runtime = include_str!("../src/lib.rs");
+    let fs = runtime
+        .find(".plugin(tauri_plugin_fs::init())")
+        .expect("fs plugin must be initialized");
+    let persisted = runtime
+        .find(".plugin(tauri_plugin_persisted_scope::init())")
+        .expect("persisted-scope plugin must be initialized");
+    assert!(fs < persisted, "fs must initialize before persisted-scope");
+}
+
+#[test]
+fn windows_bundle_installs_webview2_without_network_access() {
+    let config = windows_config();
+    let install_mode = &config["bundle"]["windows"]["webviewInstallMode"];
+
+    assert_eq!(install_mode["type"].as_str(), Some("offlineInstaller"));
+    assert_eq!(install_mode["silent"].as_bool(), Some(true));
+}
+
+#[test]
+fn windows_bundle_uses_the_pure_rust_ort_backend() {
+    let media_manifest = include_str!("../../crates/opentake-media/Cargo.toml");
+    assert!(
+        media_manifest.contains("features = [\"std\", \"ndarray\", \"alternative-backend\"]"),
+        "Windows ort must not link the native ONNX Runtime"
+    );
+    assert!(media_manifest.contains("version = \"=0.1.0\""));
+
+    let config = windows_config();
+    let resources = config["bundle"]["resources"]
+        .as_object()
+        .expect("the Windows bundle must map runtime resources explicitly");
+    assert!(
+        resources
+            .keys()
+            .all(|source| { !source.contains("onnxruntime") && !source.contains("DirectML") }),
+        "the pure-Rust Windows backend must not package native ORT providers"
+    );
+
+    let manifest = include_str!("../Cargo.toml");
+    assert!(!manifest.contains("ort-sys"));
+    let build_script = include_str!("../build.rs");
+    assert!(!build_script.contains("DirectML"));
+}
+
+#[test]
+fn every_windows_tauri_ci_job_provisions_packaged_sidecars_first() {
+    // Git may materialize the workflow with CRLF on Windows runners. Normalize
+    // before finding YAML job boundaries so this contract tests the workflow,
+    // not the checkout's line-ending policy.
+    let workflow = include_str!("../../.github/workflows/ci.yml").replace("\r\n", "\n");
+    for (job, next_job) in [
+        ("  windows-product:\n", "  windows-security:\n"),
+        ("  windows-security:\n", "  web:\n"),
+        ("  windows-library-security:\n", "  safe-filesystem:\n"),
+    ] {
+        let body = workflow
+            .split_once(job)
+            .unwrap_or_else(|| panic!("missing CI job {job}"))
+            .1
+            .split_once(next_job)
+            .unwrap_or_else(|| panic!("missing CI boundary after {job}"))
+            .0;
+        let provision = body
+            .find("python scripts/provision_ffmpeg_sidecars.py --target x86_64-pc-windows-msvc")
+            .unwrap_or_else(|| panic!("{job} must provision packaged sidecars"));
+        let tauri_compile = body
+            .find("opentake-tauri")
+            .or_else(|| body.find("tauri build"))
+            .unwrap_or_else(|| panic!("{job} must exercise Tauri"));
+
+        assert!(
+            provision < tauri_compile,
+            "{job} must provision sidecars before compiling Tauri"
+        );
+    }
+}
diff --git a/src-tauri/tests/telemetry_init.rs b/src-tauri/tests/telemetry_init.rs
new file mode 100644
index 00000000..dd29d42c
--- /dev/null
+++ b/src-tauri/tests/telemetry_init.rs
@@ -0,0 +1,64 @@
+use std::cell::RefCell;
+
+use opentake_tauri_lib::telemetry::{
+    init_telemetry_with, redact_sensitive_text, TelemetryInitStatus, TelemetrySource,
+};
+
+#[test]
+fn starts_only_with_explicit_packaged_or_environment_dsn() {
+    let starts = RefCell::new(Vec::new());
+    let start = |options: &opentake_tauri_lib::telemetry::TelemetryOptions| {
+        starts.borrow_mut().push((
+            options.source,
+            options.dsn.to_string(),
+            options.send_default_pii,
+            options.capture_failed_requests,
+            options.traces_sample_rate,
+        ));
+        Ok(())
+    };
+
+    assert_eq!(
+        init_telemetry_with(None, None, start),
+        TelemetryInitStatus::Disabled
+    );
+    assert_eq!(
+        init_telemetry_with(Some("  "), Some(""), start),
+        TelemetryInitStatus::Disabled
+    );
+    assert!(starts.borrow().is_empty());
+
+    assert_eq!(
+        init_telemetry_with(Some("https://public@example.com/1"), None, start),
+        TelemetryInitStatus::Started(TelemetrySource::Packaged)
+    );
+    assert_eq!(
+        init_telemetry_with(
+            Some("https://packaged@example.com/1"),
+            Some("https://environment@example.com/2"),
+            start,
+        ),
+        TelemetryInitStatus::Started(TelemetrySource::Environment)
+    );
+    assert_eq!(starts.borrow().len(), 2);
+    assert_eq!(starts.borrow()[0].0, TelemetrySource::Packaged);
+    assert_eq!(starts.borrow()[1].0, TelemetrySource::Environment);
+    assert_eq!(starts.borrow()[1].1, "https://environment:@example.com/2");
+    assert!(!starts.borrow()[1].2);
+    assert!(!starts.borrow()[1].3);
+    assert_eq!(starts.borrow()[1].4, 0.1);
+
+    assert_eq!(
+        init_telemetry_with(None, Some("not a dsn"), start),
+        TelemetryInitStatus::InvalidConfiguration
+    );
+    assert_eq!(starts.borrow().len(), 2);
+
+    let redacted = redact_sensitive_text(
+        "failed /Users/alice/private.otproj api_key=sk-secret token=abc123 Bearer xyz",
+    );
+    assert!(!redacted.contains("/Users/alice"));
+    assert!(!redacted.contains("sk-secret"));
+    assert!(!redacted.contains("abc123"));
+    assert!(!redacted.contains("xyz"));
+}
diff --git a/tools/completion-audit.mjs b/tools/completion-audit.mjs
index b63b9a5d..b96098c3 100644
--- a/tools/completion-audit.mjs
+++ b/tools/completion-audit.mjs
@@ -6416,6 +6416,9 @@ const REVIEWED_REPORT_SLICE_DEFINITIONS_RAW = [
     tests: [
       { path: "web/src/store/sync.test.ts", name: "does not let a late old snapshot replace a newer project", evidenceClass: "existing-owned" },
       { path: "web/src/store/commandRouting.test.ts", name: "project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events", evidenceClass: "reviewed-planned" },
+      { path: "web/src/store/sync.test.ts", name: "refetches when an event-promised version is newer than the first snapshot", evidenceClass: "reviewed-planned" },
+      { path: "web/src/store/sync.test.ts", name: "converges to N+2 when N+1 and N+2 event refreshes complete out of order", evidenceClass: "reviewed-planned" },
+      { path: "web/src/store/sync.test.ts", name: "never publishes a stale snapshot when catch-up retries are exhausted", evidenceClass: "reviewed-planned" },
     ],
     rationale: "Core mapping report CC-readonly-versioned-mirror: the versioned refresh path exists, but whole-store read-only projection ownership lacks a closed proof.",
   },
@@ -6432,6 +6435,8 @@ const REVIEWED_REPORT_SLICE_DEFINITIONS_RAW = [
     tests: [
       { path: "web/src/store/editActions.test.ts", name: "forwards swapTracks for whole-track reordering", evidenceClass: "existing-owned" },
       { path: "web/src/store/commandRouting.test.ts", name: "every_edit_action_emits_exact_edit_request", evidenceClass: "reviewed-planned" },
+      { path: "web/src/lib/api.editApply.test.ts", name: "edit_apply_forwards_exact_command_envelope", evidenceClass: "reviewed-planned" },
+      { path: "src-tauri/src/commands.rs", name: "every_frontend_edit_request_deserializes_to_intended_command", evidenceClass: "reviewed-planned" },
     ],
     rationale: "Core mapping report CC-edit-gesture-parity: focused gesture tests exist, but no closed inventory proves every UI path emits the exact shared request.",
   },
@@ -6492,6 +6497,8 @@ const REVIEWED_REPORT_SLICE_DEFINITIONS_RAW = [
     tests: [
       { path: "crates/opentake-core/src/events.rs", name: "core_event_serializes_with_kind_tag", evidenceClass: "existing-owned" },
       { path: "crates/opentake-core/src/events.rs", name: "media_changed_serializes_with_kind_tag", evidenceClass: "existing-owned" },
+      { path: "src-tauri/src/lib.rs", name: "core_event_forwarding_maps_every_name_and_tagged_payload", evidenceClass: "reviewed-planned" },
+      { path: "src-tauri/src/lib.rs", name: "core_event_forwarding_swallows_emit_failure_and_delivery_continues", evidenceClass: "reviewed-planned" },
     ],
     rationale: "Core mapping report CC-event-forwarding-complete: tagged events and intentional nonfatal WebView forwarding are implemented and need ledger evidence closure.",
   },
diff --git a/tools/completion-tests/automation-composite-helper.mjs b/tools/completion-tests/automation-composite-helper.mjs
new file mode 100644
index 00000000..f722995b
--- /dev/null
+++ b/tools/completion-tests/automation-composite-helper.mjs
@@ -0,0 +1,21 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+
+const root = fileURLToPath(new URL("../..", import.meta.url));
+const owner = "automation_children_are_atomic_reviewable_and_command_routed";
+
+export function runAutomationCompositeOwner() {
+  const result = spawnSync(
+    "cargo",
+    ["test", "-p", "opentake-agent", "--test", "editing_automation_acceptance", owner, "--", "--exact"],
+    { cwd: root, encoding: "utf8", timeout: 10 * 60 * 1000 },
+  );
+  const output = `${result.stdout ?? ""}${result.stderr ?? ""}`;
+  assert.equal(result.status, 0, `${owner} failed\n${output}`);
+  assert.match(
+    output,
+    /test result: ok\.[^\n]*1 passed; 0 failed/,
+    `${owner} did not execute exactly once\n${output}`,
+  );
+}
diff --git a/tools/completion-tests/beat-auto-cut-helper.mjs b/tools/completion-tests/beat-auto-cut-helper.mjs
new file mode 100644
index 00000000..d8bc8f86
--- /dev/null
+++ b/tools/completion-tests/beat-auto-cut-helper.mjs
@@ -0,0 +1,37 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+
+const root = fileURLToPath(new URL("../..", import.meta.url));
+
+function run(command, args, expected, label) {
+  const result = spawnSync(command, args, {
+    cwd: root,
+    encoding: "utf8",
+    timeout: 10 * 60 * 1000,
+  });
+  const output = `${result.stdout ?? ""}${result.stderr ?? ""}`;
+  assert.equal(result.status, 0, `${label} failed\n${output}`);
+  assert.match(output, expected, `${label} did not execute its owning tests\n${output}`);
+}
+
+export function runBeatAutoCutOwners() {
+  run(
+    "cargo",
+    ["test", "-p", "opentake-media", "analysis::beat::tests::"],
+    /test result: ok\.[^\n]*2 passed; 0 failed/,
+    "beat detector owners",
+  );
+  run(
+    "cargo",
+    ["test", "-p", "opentake-agent", "auto_cut_to_beats_write_"],
+    /test result: ok\.[^\n]*2 passed; 0 failed/,
+    "auto-cut dispatcher owners",
+  );
+  run(
+    "pnpm",
+    ["-C", "web", "exec", "vitest", "run", "src/store/editActions.test.ts", "-t", "accepts one atomic request"],
+    /Tests\s+1 passed/,
+    "frontend atomic automation owner",
+  );
+}
diff --git a/tools/completion-tests/doc-20499c491064a5e1.test.mjs b/tools/completion-tests/doc-20499c491064a5e1.test.mjs
new file mode 100644
index 00000000..97753e1b
--- /dev/null
+++ b/tools/completion-tests/doc-20499c491064a5e1.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_20499c491064a5e1_automation_plans_remain_deterministic_reviewable", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-25baf0950c06110c.test.mjs b/tools/completion-tests/doc-25baf0950c06110c.test.mjs
new file mode 100644
index 00000000..51a4834b
--- /dev/null
+++ b/tools/completion-tests/doc-25baf0950c06110c.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_25baf0950c06110c_the_named_automation_checks_have_matching_source", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-2f4721e90945ec6a.test.mjs b/tools/completion-tests/doc-2f4721e90945ec6a.test.mjs
new file mode 100644
index 00000000..2a881e3f
--- /dev/null
+++ b/tools/completion-tests/doc-2f4721e90945ec6a.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_2f4721e90945ec6a_automation_plans_remain_deterministic_reviewable", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-47dfcfcf41dd2784.test.mjs b/tools/completion-tests/doc-47dfcfcf41dd2784.test.mjs
new file mode 100644
index 00000000..b05a3b4e
--- /dev/null
+++ b/tools/completion-tests/doc-47dfcfcf41dd2784.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runTauriCommandContractOwners } from "./tauri-command-contract-helper.mjs";
+
+test("completion_47dfcfcf41dd2784_tauri_exposes_typed_core_edit_commands_with_stab", runTauriCommandContractOwners);
diff --git a/tools/completion-tests/doc-4cd2927d804dc4a3.test.mjs b/tools/completion-tests/doc-4cd2927d804dc4a3.test.mjs
new file mode 100644
index 00000000..59791067
--- /dev/null
+++ b/tools/completion-tests/doc-4cd2927d804dc4a3.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runTauriCommandContractOwners } from "./tauri-command-contract-helper.mjs";
+
+test("completion_4cd2927d804dc4a3_tauri_exposes_typed_core_edit_commands_with_stab", runTauriCommandContractOwners);
diff --git a/tools/completion-tests/doc-5e0b6607a2fa6485.test.mjs b/tools/completion-tests/doc-5e0b6607a2fa6485.test.mjs
new file mode 100644
index 00000000..e19c2590
--- /dev/null
+++ b/tools/completion-tests/doc-5e0b6607a2fa6485.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_5e0b6607a2fa6485_the_named_automation_checks_have_matching_source", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-5ec52eb6e8513033.test.mjs b/tools/completion-tests/doc-5ec52eb6e8513033.test.mjs
new file mode 100644
index 00000000..356a6ff6
--- /dev/null
+++ b/tools/completion-tests/doc-5ec52eb6e8513033.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runTauriCommandContractOwners } from "./tauri-command-contract-helper.mjs";
+
+test("completion_5ec52eb6e8513033_tauri_exposes_typed_core_edit_commands_with_stab", runTauriCommandContractOwners);
diff --git a/tools/completion-tests/doc-6b9188efd87853b7.test.mjs b/tools/completion-tests/doc-6b9188efd87853b7.test.mjs
new file mode 100644
index 00000000..bf215a16
--- /dev/null
+++ b/tools/completion-tests/doc-6b9188efd87853b7.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_6b9188efd87853b7_the_named_automation_checks_have_matching_source", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-9b466eb6a0df9e51.test.mjs b/tools/completion-tests/doc-9b466eb6a0df9e51.test.mjs
new file mode 100644
index 00000000..aed16108
--- /dev/null
+++ b/tools/completion-tests/doc-9b466eb6a0df9e51.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runBeatAutoCutOwners } from "./beat-auto-cut-helper.mjs";
+
+test("completion_9b466eb6a0df9e51_beat_detection_inputs_produce_bounded_reviewable", runBeatAutoCutOwners);
diff --git a/tools/completion-tests/doc-9d16b84d588273ce.test.mjs b/tools/completion-tests/doc-9d16b84d588273ce.test.mjs
new file mode 100644
index 00000000..3b03ea26
--- /dev/null
+++ b/tools/completion-tests/doc-9d16b84d588273ce.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runBeatAutoCutOwners } from "./beat-auto-cut-helper.mjs";
+
+test("completion_9d16b84d588273ce_beat_detection_inputs_produce_bounded_reviewable", runBeatAutoCutOwners);
diff --git a/tools/completion-tests/doc-b0fa71fc2443ba5a.test.mjs b/tools/completion-tests/doc-b0fa71fc2443ba5a.test.mjs
new file mode 100644
index 00000000..c85936b1
--- /dev/null
+++ b/tools/completion-tests/doc-b0fa71fc2443ba5a.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runTauriCommandContractOwners } from "./tauri-command-contract-helper.mjs";
+
+test("completion_b0fa71fc2443ba5a_tauri_exposes_typed_core_edit_commands_with_stab", runTauriCommandContractOwners);
diff --git a/tools/completion-tests/doc-ba234d45702696c8.test.mjs b/tools/completion-tests/doc-ba234d45702696c8.test.mjs
new file mode 100644
index 00000000..5fa84592
--- /dev/null
+++ b/tools/completion-tests/doc-ba234d45702696c8.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runBeatAutoCutOwners } from "./beat-auto-cut-helper.mjs";
+
+test("completion_ba234d45702696c8_beat_detection_inputs_produce_bounded_reviewable", runBeatAutoCutOwners);
diff --git a/tools/completion-tests/doc-bddbf14c3d9a9ce7.test.mjs b/tools/completion-tests/doc-bddbf14c3d9a9ce7.test.mjs
new file mode 100644
index 00000000..33e76b41
--- /dev/null
+++ b/tools/completion-tests/doc-bddbf14c3d9a9ce7.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_bddbf14c3d9a9ce7_the_named_automation_checks_have_matching_source", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-bf6666ce4bc65294.test.mjs b/tools/completion-tests/doc-bf6666ce4bc65294.test.mjs
new file mode 100644
index 00000000..484c62e3
--- /dev/null
+++ b/tools/completion-tests/doc-bf6666ce4bc65294.test.mjs
@@ -0,0 +1,39 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import test from "node:test";
+import { fileURLToPath } from "node:url";
+
+const root = fileURLToPath(new URL("../..", import.meta.url));
+
+function runFocusedRustTest(packageName, testName) {
+  const result = spawnSync(
+    "cargo",
+    ["test", "-p", packageName, testName, "--", "--exact", "--test-threads=1"],
+    {
+      cwd: root,
+      encoding: "utf8",
+      timeout: 10 * 60 * 1000,
+    },
+  );
+  const output = `${result.stdout ?? ""}${result.stderr ?? ""}`;
+  assert.equal(
+    result.status,
+    0,
+    `${packageName}#${testName} failed\n${output}`,
+  );
+  assert.match(
+    output,
+    /test result: ok\.[^\n]*1 passed; 0 failed/,
+    `${packageName}#${testName} did not execute exactly one owning test\n${output}`,
+  );
+}
+
+test(
+  "completion_bf6666ce4bc65294_resolve_media_ref_to_an_expected_path_while_dist",
+  { timeout: 30 * 60 * 1000 },
+  () => {
+    runFocusedRustTest("opentake-domain", "media::tests::resolver_expected_path_external");
+    runFocusedRustTest("opentake-tauri", "media::tests::dto_reports_file_size_for_present_source");
+    runFocusedRustTest("opentake-tauri", "media::tests::relink_keeps_same_id_and_clears_missing");
+  },
+);
diff --git a/tools/completion-tests/doc-c2871cf84ffdba1d.test.mjs b/tools/completion-tests/doc-c2871cf84ffdba1d.test.mjs
new file mode 100644
index 00000000..8d96e141
--- /dev/null
+++ b/tools/completion-tests/doc-c2871cf84ffdba1d.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runAutomationCompositeOwner } from "./automation-composite-helper.mjs";
+
+test("completion_c2871cf84ffdba1d_automation_plans_remain_deterministic_reviewable", runAutomationCompositeOwner);
diff --git a/tools/completion-tests/doc-e7610731e7410ad4.test.mjs b/tools/completion-tests/doc-e7610731e7410ad4.test.mjs
new file mode 100644
index 00000000..af88b7db
--- /dev/null
+++ b/tools/completion-tests/doc-e7610731e7410ad4.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runBeatAutoCutOwners } from "./beat-auto-cut-helper.mjs";
+
+test("completion_e7610731e7410ad4_beat_detection_inputs_produce_bounded_reviewable", runBeatAutoCutOwners);
diff --git a/tools/completion-tests/doc-edfd998c6ede77c2.test.mjs b/tools/completion-tests/doc-edfd998c6ede77c2.test.mjs
new file mode 100644
index 00000000..e3cbdb4d
--- /dev/null
+++ b/tools/completion-tests/doc-edfd998c6ede77c2.test.mjs
@@ -0,0 +1,4 @@
+import test from "node:test";
+import { runBeatAutoCutOwners } from "./beat-auto-cut-helper.mjs";
+
+test("completion_edfd998c6ede77c2_beat_detection_inputs_produce_bounded_reviewable", runBeatAutoCutOwners);
diff --git a/tools/completion-tests/tauri-command-contract-helper.mjs b/tools/completion-tests/tauri-command-contract-helper.mjs
new file mode 100644
index 00000000..1cd81017
--- /dev/null
+++ b/tools/completion-tests/tauri-command-contract-helper.mjs
@@ -0,0 +1,65 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { spawnSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+
+const root = fileURLToPath(new URL("../..", import.meta.url));
+
+function run(command, args, expected, label) {
+  const result = spawnSync(command, args, {
+    cwd: root,
+    encoding: "utf8",
+    timeout: 10 * 60 * 1000,
+  });
+  const output = `${result.stdout ?? ""}${result.stderr ?? ""}`;
+  assert.equal(result.status, 0, `${label} failed\n${output}`);
+  assert.match(output, expected, `${label} did not execute its exact owner\n${output}`);
+}
+
+export function runTauriCommandContractOwners() {
+  run(
+    "cargo",
+    [
+      "test",
+      "-p",
+      "opentake-tauri",
+      "commands::edit_request_serde_tests::every_edit_request_maps_to_exact_edit_command",
+      "--",
+      "--exact",
+    ],
+    /1 passed; 0 failed/,
+    "Rust edit-request contract",
+  );
+  run(
+    "cargo",
+    ["test", "-p", "opentake-core", "dto::tests::edit_apply_handler_maps_validation_error", "--", "--exact"],
+    /1 passed; 0 failed/,
+    "core typed-error atomicity contract",
+  );
+  run(
+    "cargo",
+    [
+      "test",
+      "-p",
+      "opentake-core",
+      "dto::tests::internal_command_error_does_not_expose_project_paths",
+      "--",
+      "--exact",
+    ],
+    /1 passed; 0 failed/,
+    "core internal-error redaction contract",
+  );
+  run(
+    "pnpm",
+    ["-C", "web", "exec", "vitest", "run", "src/lib/api.commandContract.test.ts", "src/lib/api.editApply.test.ts"],
+    /Tests\s+3 passed/,
+    "frontend invoke and typed-error contract",
+  );
+
+  const coreSpec = readFileSync(`${root}/docs/specs/core/6-tauri-commands.md`, "utf8");
+  const frontendSpec = readFileSync(`${root}/docs/specs/frontend/11-tauri.md`, "utf8");
+  assert.match(coreSpec, /41 分支严格联合/);
+  assert.match(coreSpec, /TauriCommandError/);
+  assert.match(frontendSpec, /frontend_command_names_match_invoke_handler/);
+  assert.doesNotMatch(frontendSpec, /`export_start`|`clip_copy`|`project_save_as`/);
+}
diff --git a/web/package.json b/web/package.json
index 5bb86adf..0be7e903 100644
--- a/web/package.json
+++ b/web/package.json
@@ -1,7 +1,7 @@
 {
   "name": "opentake-web",
   "private": true,
-  "version": "1.0.0",
+  "version": "1.0.0-beta.1",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/web/src/App.tsx b/web/src/App.tsx
index e3a0b0b8..25cd843e 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -1,7 +1,9 @@
 import { useEffect } from "react";
 import { TitleBar } from "./components/shell/TitleBar";
+import { ApplicationMenuBridge } from "./components/shell/ViewMenu";
 import { ExportDialog } from "./components/shell/ExportDialog";
 import { SaveAsProgress } from "./components/shell/SaveAsProgress";
+import { ProjectSettingsMismatchDialog } from "./components/shell/ProjectSettingsMismatchDialog";
 import { EditorSplit } from "./components/shell/EditorSplit";
 import { CompatibilityBanner } from "./components/shell/CompatibilityBanner";
 import { HomeView } from "./components/home/HomeView";
@@ -14,7 +16,7 @@ import { startSync } from "./store/sync";
 import { startMediaSync } from "./store/mediaStore";
 import { useEditorUiStore } from "./store/uiStore";
 import { initI18n } from "./i18n";
-import { initTheme, initWindowSize } from "./store/settingsStore";
+import { initProxyPlayback, initTheme, initWindowSize } from "./store/settingsStore";
 import { onGoHome } from "./lib/api";
 
 function Toast() {
@@ -65,6 +67,7 @@ export default function App() {
     initI18n();
     initTheme();
     initWindowSize();
+    initProxyPlayback();
     void startSync();
     void startMediaSync();
     // Window closed → app stays resident; return to the launcher (so a
@@ -104,6 +107,7 @@ export default function App() {
       }}
     >
       <CompatibilityBanner />
+      <ApplicationMenuBridge />
       {view === "home" ? (
         <HomeView />
       ) : view === "library" ? (
@@ -119,6 +123,7 @@ export default function App() {
       {settingsOpen && <SettingsView />}
       <ExportDialog />
       <SaveAsProgress />
+      <ProjectSettingsMismatchDialog />
       <Toast />
     </div>
   );
diff --git a/web/src/components/agent/AgentPanel.tsx b/web/src/components/agent/AgentPanel.tsx
index 97c5fd53..f47de367 100644
--- a/web/src/components/agent/AgentPanel.tsx
+++ b/web/src/components/agent/AgentPanel.tsx
@@ -1,7 +1,16 @@
-import { useEffect, useRef, useState, type CSSProperties, type KeyboardEvent } from "react";
+import {
+  useEffect,
+  useRef,
+  useState,
+  type CSSProperties,
+  type KeyboardEvent,
+  type ReactNode,
+} from "react";
 import {
   ChevronDown,
   ChevronRight,
+  Clapperboard,
+  MessageSquare,
   Plus,
   Send,
   Settings as SettingsIcon,
@@ -25,6 +34,7 @@ import { useSettingsStore } from "../../store/settingsStore";
 import { mintSessionId, useChatStore } from "../../store/chatStore";
 import { useEditorUiStore } from "../../store/uiStore";
 import { useProjectStore } from "../../store/projectStore";
+import { MotionPanel } from "./MotionPanel";
 
 const NO_KEY_HINT = /Settings|设置|API key/i;
 
@@ -45,13 +55,22 @@ export function AgentPanel() {
   const finalize = useChatStore((state) => state.finalize);
   const setMessages = useChatStore((state) => state.setMessages);
   const reset = useChatStore((state) => state.reset);
+  const composerDraft = useChatStore((state) => state.composerDraft);
+  const setComposerDraft = useChatStore((state) => state.setComposerDraft);
 
   const [input, setInput] = useState("");
+  const [panelMode, setPanelMode] = useState<"chat" | "motion">("chat");
   const [sessions, setSessions] = useState<ChatSession[]>([]);
   const sessionsRef = useRef<ChatSession[]>([]);
   const tabMutationRef = useRef<Promise<void>>(Promise.resolve());
   const scrollRef = useRef<HTMLDivElement>(null);
 
+  useEffect(() => {
+    if (composerDraft === null) return;
+    setInput(composerDraft);
+    setComposerDraft(null);
+  }, [composerDraft, setComposerDraft]);
+
   function commitSessions(next: ChatSession[]) {
     sessionsRef.current = next;
     setSessions(next);
@@ -342,9 +361,9 @@ export function AgentPanel() {
         }}
       >
         <span style={{ fontSize: "var(--fs-sm)", fontWeight: 600, color: "var(--text-primary)" }}>
-          {t("agent.title")}
+          {panelMode === "chat" ? t("agent.title") : t("motion.heading")}
         </span>
-        <button
+        {panelMode === "chat" && <button
           type="button"
           onClick={() => void newChat()}
           disabled={streaming || !projectPath}
@@ -363,9 +382,36 @@ export function AgentPanel() {
           }}
         >
           <Plus size={14} />
-        </button>
+        </button>}
       </div>
 
+      <div
+        role="group"
+        aria-label={t("agent.modes")}
+        style={{
+          display: "grid",
+          gridTemplateColumns: "1fr 1fr",
+          gap: 3,
+          padding: "var(--space-xs) var(--space-sm)",
+          borderBottom: "var(--bw-hairline) solid var(--border-subtle)",
+          flexShrink: 0,
+        }}
+      >
+        <PanelModeButton
+          active={panelMode === "chat"}
+          label={t("agent.chatMode")}
+          icon={<MessageSquare size={13} />}
+          onClick={() => setPanelMode("chat")}
+        />
+        <PanelModeButton
+          active={panelMode === "motion"}
+          label={t("agent.motionMode")}
+          icon={<Clapperboard size={13} />}
+          onClick={() => setPanelMode("motion")}
+        />
+      </div>
+
+      {panelMode === "chat" ? <>
       <div
         role="tablist"
         aria-label={t("agent.tabs")}
@@ -526,10 +572,45 @@ export function AgentPanel() {
           </button>
         )}
       </div>
+      </> : <MotionPanel />}
     </div>
   );
 }
 
+function PanelModeButton({
+  active,
+  label,
+  icon,
+  onClick,
+}: {
+  active: boolean;
+  label: string;
+  icon: ReactNode;
+  onClick: () => void;
+}) {
+  return (
+    <button
+      type="button"
+      aria-pressed={active}
+      onClick={onClick}
+      style={{
+        height: 27,
+        display: "inline-flex",
+        alignItems: "center",
+        justifyContent: "center",
+        gap: 6,
+        borderRadius: "var(--radius-sm)",
+        background: active ? "var(--bg-elevated)" : "transparent",
+        color: active ? "var(--text-primary)" : "var(--text-muted)",
+        fontSize: "var(--fs-xs)",
+      }}
+    >
+      {icon}
+      {label}
+    </button>
+  );
+}
+
 function sessionTitle(session: ChatSession, fallback: string): string {
   const firstUserMessage = session.messages.find(
     (message) => message.role === "user" && message.content.trim().length > 0,
diff --git a/web/src/components/agent/MotionPanel.test.tsx b/web/src/components/agent/MotionPanel.test.tsx
new file mode 100644
index 00000000..2cde5b56
--- /dev/null
+++ b/web/src/components/agent/MotionPanel.test.tsx
@@ -0,0 +1,85 @@
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const api = vi.hoisted(() => ({
+  addMotion: vi.fn(),
+  cancelMotion: vi.fn(),
+  motionCapability: vi.fn(),
+  onMotionProgress: vi.fn(),
+}));
+const sync = vi.hoisted(() => ({ forceRefresh: vi.fn() }));
+
+vi.mock("../../lib/api", () => ({
+  ...api,
+  isTauri: true,
+}));
+vi.mock("../../store/sync", () => sync);
+
+import { useI18nStore } from "../../i18n";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { MotionPanel } from "./MotionPanel";
+
+describe("MotionPanel", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(async () => {
+    vi.clearAllMocks();
+    useI18nStore.setState({ locale: "en" });
+    useProjectStore.setState({
+      projectPath: "/tmp/demo.opentake",
+      timeline: { fps: 24, width: 1920, height: 1080, settingsConfigured: true, tracks: [] },
+    });
+    useEditorUiStore.setState({ activeFrame: 48, selectedClipIds: new Set() });
+    api.motionCapability.mockResolvedValue(true);
+    api.onMotionProgress.mockResolvedValue(() => {});
+    api.addMotion.mockResolvedValue({
+      clipId: "motion-clip",
+      assetId: "motion-asset",
+      contentHash: "hash",
+      actionName: "Add Motion Graphic",
+      output: {
+        renderer: "motion-canvas",
+        rendererVersion: "3.17.2",
+        outputFile: "output.mp4",
+        fps: 24,
+        width: 1920,
+        height: 1080,
+        durationFrames: 72,
+        durationSeconds: 3,
+        contentHash: "hash",
+      },
+    });
+    sync.forceRefresh.mockResolvedValue(undefined);
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+    await act(async () => root.render(<MotionPanel />));
+  });
+
+  afterEach(async () => {
+    if (root) await act(async () => root.unmount());
+    container?.remove();
+  });
+
+  it("submits a frame-exact template at the playhead and selects the committed clip", async () => {
+    const add = Array.from(container.querySelectorAll("button")).find((button) =>
+      button.textContent?.includes("Add at playhead"),
+    );
+    expect(add).toBeDefined();
+    await act(async () => add!.click());
+
+    expect(api.addMotion).toHaveBeenCalledWith(
+      expect.objectContaining({
+        templateId: "title-card",
+        startFrame: 48,
+        durationFrames: 72,
+      }),
+    );
+    expect(sync.forceRefresh).toHaveBeenCalledOnce();
+    expect(useEditorUiStore.getState().selectedClipIds).toEqual(new Set(["motion-clip"]));
+  });
+});
+// @vitest-environment happy-dom
diff --git a/web/src/components/agent/MotionPanel.tsx b/web/src/components/agent/MotionPanel.tsx
new file mode 100644
index 00000000..dee1a746
--- /dev/null
+++ b/web/src/components/agent/MotionPanel.tsx
@@ -0,0 +1,257 @@
+import { useEffect, useMemo, useState } from "react";
+import { Clapperboard, Square } from "lucide-react";
+import {
+  addMotion,
+  cancelMotion,
+  isTauri,
+  motionCapability,
+  onMotionProgress,
+  type MotionProgressPhase,
+} from "../../lib/api";
+import { useT } from "../../i18n";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { forceRefresh } from "../../store/sync";
+
+const PHASE_KEYS: Record<MotionProgressPhase, string> = {
+  validating: "motion.phaseValidating",
+  rendering: "motion.phaseRendering",
+  encoding: "motion.phaseEncoding",
+  committing: "motion.phaseCommitting",
+  complete: "motion.phaseComplete",
+};
+
+export function MotionPanel() {
+  const t = useT();
+  const projectPath = useProjectStore((state) => state.projectPath);
+  const fps = useProjectStore((state) => state.timeline.fps);
+  const activeFrame = useEditorUiStore((state) => state.activeFrame);
+  const selectClips = useEditorUiStore((state) => state.selectClips);
+  const [available, setAvailable] = useState<boolean | null>(null);
+  const [templateId, setTemplateId] = useState<"title-card" | "lower-third.glass">(
+    "title-card",
+  );
+  const [title, setTitle] = useState("OpenTake");
+  const [subtitle, setSubtitle] = useState("");
+  const [accent, setAccent] = useState("#7C5CFF");
+  const [durationSeconds, setDurationSeconds] = useState(3);
+  const [phase, setPhase] = useState<MotionProgressPhase | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const rendering = phase !== null && phase !== "complete";
+  const durationFrames = useMemo(
+    () => Math.max(1, Math.round(durationSeconds * Math.max(1, fps))),
+    [durationSeconds, fps],
+  );
+
+  useEffect(() => {
+    let disposed = false;
+    void motionCapability().then((result) => {
+      if (!disposed) setAvailable(result);
+    });
+    return () => {
+      disposed = true;
+    };
+  }, []);
+
+  useEffect(() => {
+    let disposed = false;
+    let unlisten: () => void = () => {};
+    void onMotionProgress(setPhase).then((dispose) => {
+      if (disposed) dispose();
+      else unlisten = dispose;
+    });
+    return () => {
+      disposed = true;
+      unlisten();
+    };
+  }, []);
+
+  async function add() {
+    if (!projectPath || !available || rendering || !title.trim()) return;
+    setError(null);
+    setPhase("validating");
+    try {
+      const commit = await addMotion({
+        templateId,
+        params: {
+          title: title.trim(),
+          subtitle: subtitle.trim(),
+          accent,
+        },
+        startFrame: Math.max(0, Math.round(activeFrame)),
+        durationFrames,
+      });
+      await forceRefresh();
+      selectClips(new Set([commit.clipId]));
+      setPhase("complete");
+    } catch (reason) {
+      setPhase(null);
+      setError(reason instanceof Error ? reason.message : String(reason));
+    }
+  }
+
+  async function cancel() {
+    await cancelMotion();
+  }
+
+  if (!isTauri) {
+    return <MotionNotice>{t("motion.desktopOnly")}</MotionNotice>;
+  }
+  if (available === null) {
+    return <MotionNotice>{t("motion.checking")}</MotionNotice>;
+  }
+  if (!available) {
+    return <MotionNotice>{t("motion.unavailable")}</MotionNotice>;
+  }
+
+  return (
+    <div
+      style={{
+        flex: 1,
+        minHeight: 0,
+        overflowY: "auto",
+        padding: "var(--space-md)",
+        display: "flex",
+        flexDirection: "column",
+        gap: "var(--space-md)",
+      }}
+    >
+      <div>
+        <div style={{ fontSize: "var(--fs-sm)", fontWeight: 650, color: "var(--text-primary)" }}>
+          {t("motion.heading")}
+        </div>
+        <div style={{ marginTop: 4, fontSize: "var(--fs-xs)", color: "var(--text-muted)" }}>
+          {t("motion.description")}
+        </div>
+      </div>
+
+      <label style={fieldStyle}>
+        <span>{t("motion.template")}</span>
+        <select
+          aria-label={t("motion.template")}
+          value={templateId}
+          disabled={rendering}
+          onChange={(event) =>
+            setTemplateId(event.target.value as "title-card" | "lower-third.glass")
+          }
+          style={inputStyle}
+        >
+          <option value="title-card">{t("motion.titleCard")}</option>
+          <option value="lower-third.glass">{t("motion.lowerThird")}</option>
+        </select>
+      </label>
+      <label style={fieldStyle}>
+        <span>{t("motion.title")}</span>
+        <input
+          value={title}
+          disabled={rendering}
+          onChange={(event) => setTitle(event.target.value)}
+          style={inputStyle}
+        />
+      </label>
+      <label style={fieldStyle}>
+        <span>{t("motion.subtitle")}</span>
+        <input
+          value={subtitle}
+          disabled={rendering}
+          onChange={(event) => setSubtitle(event.target.value)}
+          style={inputStyle}
+        />
+      </label>
+      <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: "var(--space-sm)" }}>
+        <label style={fieldStyle}>
+          <span>{t("motion.duration")}</span>
+          <input
+            type="number"
+            min={0.5}
+            max={30}
+            step={0.5}
+            value={durationSeconds}
+            disabled={rendering}
+            onChange={(event) => setDurationSeconds(Number(event.target.value))}
+            style={inputStyle}
+          />
+        </label>
+        <label style={fieldStyle}>
+          <span>{t("motion.accent")}</span>
+          <input
+            type="color"
+            value={accent}
+            disabled={rendering}
+            onChange={(event) => setAccent(event.target.value)}
+            style={{ ...inputStyle, padding: 3, minHeight: 34 }}
+          />
+        </label>
+      </div>
+
+      {phase && (
+        <div role="status" style={{ fontSize: "var(--fs-xs)", color: "var(--text-secondary)" }}>
+          {t(PHASE_KEYS[phase])}
+        </div>
+      )}
+      {error && (
+        <div role="alert" style={{ fontSize: "var(--fs-xs)", color: "var(--accent-danger)" }}>
+          {error}
+        </div>
+      )}
+
+      {rendering ? (
+        <button type="button" onClick={() => void cancel()} style={primaryButtonStyle}>
+          <Square size={13} /> {t("motion.cancel")}
+        </button>
+      ) : (
+        <button
+          type="button"
+          onClick={() => void add()}
+          disabled={!projectPath || !title.trim()}
+          style={{
+            ...primaryButtonStyle,
+            opacity: projectPath && title.trim() ? 1 : 0.45,
+          }}
+        >
+          <Clapperboard size={15} /> {t("motion.addAtPlayhead")}
+        </button>
+      )}
+    </div>
+  );
+}
+
+function MotionNotice({ children }: { children: string }) {
+  return (
+    <div style={{ padding: "var(--space-lg)", color: "var(--text-muted)", fontSize: "var(--fs-sm)" }}>
+      {children}
+    </div>
+  );
+}
+
+const fieldStyle = {
+  display: "flex",
+  flexDirection: "column",
+  gap: 5,
+  color: "var(--text-secondary)",
+  fontSize: "var(--fs-xs)",
+} as const;
+
+const inputStyle = {
+  width: "100%",
+  border: "var(--bw-thin) solid var(--border-subtle)",
+  borderRadius: "var(--radius-sm)",
+  background: "var(--bg-elevated)",
+  color: "var(--text-primary)",
+  padding: "7px 9px",
+  fontFamily: "inherit",
+  fontSize: "var(--fs-sm)",
+} as const;
+
+const primaryButtonStyle = {
+  minHeight: 36,
+  display: "inline-flex",
+  alignItems: "center",
+  justifyContent: "center",
+  gap: 7,
+  borderRadius: "var(--radius-sm)",
+  background: "var(--accent-primary)",
+  color: "#111",
+  fontSize: "var(--fs-sm)",
+  fontWeight: 650,
+} as const;
diff --git a/web/src/components/home/HomeView.interaction.test.tsx b/web/src/components/home/HomeView.interaction.test.tsx
new file mode 100644
index 00000000..edfbdfa0
--- /dev/null
+++ b/web/src/components/home/HomeView.interaction.test.tsx
@@ -0,0 +1,325 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  newProjectAndEnter: vi.fn(),
+  openProjectPath: vi.fn(),
+  openProjectViaDialog: vi.fn(),
+}));
+
+vi.mock("../../i18n", () => ({
+  useT: () => (key: string) => key,
+}));
+
+vi.mock("../../lib/api", () => ({ isTauri: false }));
+
+vi.mock("../../store/projectActions", () => ({
+  newProjectAndEnter: mocks.newProjectAndEnter,
+  openProjectPath: mocks.openProjectPath,
+  openProjectViaDialog: mocks.openProjectViaDialog,
+}));
+
+import { useRecentStore } from "../../store/recentStore";
+import { useEditorUiStore } from "../../store/uiStore";
+import {
+  HOME_NOTICE_STORAGE_KEY,
+  HOME_NOTICE_VERSION,
+  HomeView,
+} from "./HomeView";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+const PROJECT_PATH = "/tmp/Recent Demo.opentake";
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function deferred<T>() {
+  let resolve!: (value: T | PromiseLike<T>) => void;
+  const promise = new Promise<T>((done) => {
+    resolve = done;
+  });
+  return { promise, resolve };
+}
+
+function buttonsNamed(label: string): HTMLButtonElement[] {
+  return [...(container?.querySelectorAll<HTMLButtonElement>("button") ?? [])]
+    .filter((button) => button.textContent === label);
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  mocks.newProjectAndEnter.mockResolvedValue(undefined);
+  mocks.openProjectPath.mockResolvedValue(undefined);
+  mocks.openProjectViaDialog.mockResolvedValue(undefined);
+  localStorage.clear();
+  localStorage.setItem(HOME_NOTICE_STORAGE_KEY, HOME_NOTICE_VERSION);
+  useRecentStore.setState({
+    recents: [{ path: PROJECT_PATH, name: "Recent Demo", openedAt: 1 }],
+  });
+  useEditorUiStore.setState({ view: "home", settingsOpen: false });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+});
+
+describe("Home recent-project controls", () => {
+  it("control-e2d0f1ed3415ea45 create a new project from the Home sidebar", async () => {
+    const pending = deferred<void>();
+    mocks.newProjectAndEnter.mockReturnValueOnce(pending.promise);
+    await act(async () => root?.render(<HomeView />));
+    const sidebarNew = buttonsNamed("home.newProject")[0];
+
+    await act(async () => sidebarNew?.click());
+
+    expect(mocks.newProjectAndEnter).toHaveBeenCalledTimes(1);
+    expect(buttonsNamed("home.creating")).toHaveLength(2);
+    expect(buttonsNamed("home.creating").every((button) => button.disabled)).toBe(true);
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(buttonsNamed("home.newProject")).toHaveLength(2));
+  });
+
+  it("control-575978f9bced5959 create a new project from the empty launcher", async () => {
+    const pending = deferred<void>();
+    mocks.newProjectAndEnter.mockReturnValueOnce(pending.promise);
+    useRecentStore.setState({ recents: [] });
+    await act(async () => root?.render(<HomeView />));
+    const emptyNew = buttonsNamed("home.newProject")[1];
+
+    await act(async () => emptyNew?.click());
+
+    expect(mocks.newProjectAndEnter).toHaveBeenCalledTimes(1);
+    expect(buttonsNamed("home.creating")).toHaveLength(2);
+    expect(buttonsNamed("home.openProject").every((button) => button.disabled)).toBe(true);
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(buttonsNamed("home.newProject")).toHaveLength(2));
+  });
+
+  it("control-74f414d717baaed3 create a new project from the populated launcher", async () => {
+    const pending = deferred<void>();
+    mocks.newProjectAndEnter.mockReturnValueOnce(pending.promise);
+    await act(async () => root?.render(<HomeView />));
+    const populatedNew = buttonsNamed("home.newProject")[1];
+
+    await act(async () => populatedNew?.click());
+
+    expect(mocks.newProjectAndEnter).toHaveBeenCalledTimes(1);
+    expect(buttonsNamed("home.creating")).toHaveLength(2);
+    expect(container?.querySelector<HTMLButtonElement>("button.home-project-card")?.disabled).toBe(
+      true,
+    );
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(buttonsNamed("home.newProject")).toHaveLength(2));
+  });
+
+  it("restores all project controls after new-project creation rejects", async () => {
+    mocks.newProjectAndEnter.mockRejectedValueOnce(new Error("project create failed"));
+    await act(async () => root?.render(<HomeView />));
+
+    await act(async () => buttonsNamed("home.newProject")[0]?.click());
+
+    expect(mocks.newProjectAndEnter).toHaveBeenCalledTimes(1);
+    expect(buttonsNamed("home.newProject")).toHaveLength(2);
+    expect(buttonsNamed("home.newProject").every((button) => !button.disabled)).toBe(true);
+    expect(buttonsNamed("home.openProject").every((button) => !button.disabled)).toBe(true);
+    expect(container?.querySelector<HTMLButtonElement>("button.home-project-card")?.disabled).toBe(
+      false,
+    );
+  });
+
+  it("control-ef78873f98fcab84 open a project from the Home sidebar", async () => {
+    const pending = deferred<void>();
+    mocks.openProjectViaDialog.mockReturnValueOnce(pending.promise);
+    await act(async () => root?.render(<HomeView />));
+    const sidebarOpen = buttonsNamed("home.openProject")[0];
+
+    await act(async () => sidebarOpen?.click());
+    expect(mocks.openProjectViaDialog).toHaveBeenCalledTimes(1);
+    expect(sidebarOpen?.textContent).toBe("home.opening");
+    expect(sidebarOpen?.disabled).toBe(true);
+    expect(buttonsNamed("home.opening")).toHaveLength(2);
+    expect(buttonsNamed("home.opening").every((button) => button.disabled)).toBe(true);
+    expect(buttonsNamed("home.newProject").every((button) => button.disabled)).toBe(true);
+    const recent = container?.querySelector<HTMLButtonElement>("button.home-project-card");
+    expect(recent?.disabled).toBe(true);
+
+    await act(async () => buttonsNamed("home.opening")[1]?.click());
+    expect(mocks.openProjectViaDialog).toHaveBeenCalledTimes(1);
+
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(sidebarOpen?.textContent).toBe("home.openProject"));
+    expect(sidebarOpen?.disabled).toBe(false);
+    expect(buttonsNamed("home.newProject").every((button) => !button.disabled)).toBe(true);
+    expect(recent?.disabled).toBe(false);
+  });
+
+  it("control-2121d7b9fdc279b9 open a project from the empty launcher", async () => {
+    const pending = deferred<void>();
+    mocks.openProjectViaDialog.mockReturnValueOnce(pending.promise);
+    useRecentStore.setState({ recents: [] });
+    await act(async () => root?.render(<HomeView />));
+    const emptyOpen = buttonsNamed("home.openProject")[1];
+
+    await act(async () => emptyOpen?.click());
+    expect(mocks.openProjectViaDialog).toHaveBeenCalledTimes(1);
+    expect(emptyOpen?.textContent).toBe("home.opening");
+    expect(emptyOpen?.disabled).toBe(true);
+
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(emptyOpen?.textContent).toBe("home.openProject"));
+    expect(emptyOpen?.disabled).toBe(false);
+  });
+
+  it("control-ab109c708bb0efbf open a project from the populated launcher", async () => {
+    const pending = deferred<void>();
+    mocks.openProjectViaDialog.mockReturnValueOnce(pending.promise);
+    await act(async () => root?.render(<HomeView />));
+    const populatedOpen = buttonsNamed("home.openProject")[1];
+
+    await act(async () => populatedOpen?.click());
+    expect(mocks.openProjectViaDialog).toHaveBeenCalledTimes(1);
+    expect(populatedOpen?.textContent).toBe("home.opening");
+    expect(populatedOpen?.disabled).toBe(true);
+
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(populatedOpen?.textContent).toBe("home.openProject"));
+    expect(populatedOpen?.disabled).toBe(false);
+  });
+
+  it("restores an open control after the native project command rejects", async () => {
+    const failure = new Error("project open timed out");
+    mocks.openProjectViaDialog.mockRejectedValueOnce(failure);
+    await act(async () => root?.render(<HomeView />));
+    const sidebarOpen = buttonsNamed("home.openProject")[0];
+
+    await act(async () => sidebarOpen?.click());
+
+    expect(mocks.openProjectViaDialog).toHaveBeenCalledTimes(1);
+    expect(sidebarOpen?.textContent).toBe("home.openProject");
+    expect(sidebarOpen?.disabled).toBe(false);
+  });
+
+  it("serializes a recent-card open through the shared Home pending state", async () => {
+    const pending = deferred<void>();
+    mocks.openProjectPath.mockReturnValueOnce(pending.promise);
+    await act(async () => root?.render(<HomeView />));
+    const card = container?.querySelector<HTMLButtonElement>("button.home-project-card");
+
+    await act(async () =>
+      card?.dispatchEvent(new MouseEvent("dblclick", { bubbles: true })),
+    );
+
+    expect(mocks.openProjectPath).toHaveBeenCalledTimes(1);
+    expect(buttonsNamed("home.opening")).toHaveLength(2);
+    expect(card?.disabled).toBe(true);
+
+    await act(async () =>
+      card?.dispatchEvent(new MouseEvent("dblclick", { bubbles: true })),
+    );
+    expect(mocks.openProjectPath).toHaveBeenCalledTimes(1);
+
+    await act(async () => pending.resolve());
+    await vi.waitFor(() => expect(card?.disabled).toBe(false));
+    expect(buttonsNamed("home.openProject")).toHaveLength(2);
+  });
+
+  it("control-f4a6b4f8789ea013 open the global Library from Home", async () => {
+    await act(async () => root?.render(<HomeView />));
+    const library = [...(container?.querySelectorAll<HTMLButtonElement>("button") ?? [])]
+      .find((button) => button.textContent === "library.entry");
+
+    expect(library).not.toBeUndefined();
+    await act(async () => library?.click());
+    expect(useEditorUiStore.getState().view).toBe("library");
+  });
+
+  it("control-810a7d793fcd8323 open Settings from Home", async () => {
+    await act(async () => root?.render(<HomeView />));
+    const settings = [...(container?.querySelectorAll<HTMLButtonElement>("button") ?? [])]
+      .find((button) => button.textContent === "home.settings");
+
+    expect(settings).not.toBeUndefined();
+    await act(async () => settings?.click());
+    expect(useEditorUiStore.getState().settingsOpen).toBe(true);
+  });
+
+  it("control-acd6238c08e790cc clear recent-project card selection", async () => {
+    await act(async () => root?.render(<HomeView />));
+    const card = container?.querySelector<HTMLButtonElement>(
+      'button.home-project-card[aria-label="Recent Demo"]',
+    );
+    const launcher = card?.parentElement?.parentElement?.parentElement;
+
+    expect(launcher).not.toBeNull();
+    await act(async () => card?.click());
+    expect(card?.getAttribute("aria-pressed")).toBe("true");
+    await act(async () => launcher?.click());
+    expect(card?.getAttribute("aria-pressed")).toBe("false");
+  });
+
+  it("control-ec1cd7a2d49bb97a remove a recent project entry", async () => {
+    await act(async () => root?.render(<HomeView />));
+    const card = container?.querySelector<HTMLButtonElement>(
+      'button.home-project-card[aria-label="Recent Demo"]',
+    );
+    const wrapper = card?.parentElement;
+
+    await act(async () => wrapper?.dispatchEvent(new MouseEvent("mouseover", { bubbles: true })));
+    const remove = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="home.remove"]',
+    );
+    expect(remove).not.toBeNull();
+
+    await act(async () => remove?.click());
+    expect(useRecentStore.getState().recents).toEqual([]);
+    expect(container?.querySelector("button.home-project-card")).toBeNull();
+    expect(mocks.openProjectPath).not.toHaveBeenCalled();
+  });
+
+  it("control-9697b53d4d2cf1ca select or open a recent project card", async () => {
+    await act(async () => root?.render(<HomeView />));
+    const card = container?.querySelector<HTMLButtonElement>(
+      'button.home-project-card[aria-label="Recent Demo"]',
+    );
+
+    expect(card).not.toBeNull();
+    expect(card?.tabIndex).toBe(0);
+    expect(card?.getAttribute("aria-label")).toBe("Recent Demo");
+    expect(card?.getAttribute("aria-pressed")).toBe("false");
+
+    await act(async () => card?.focus());
+    expect(card?.getAttribute("aria-pressed")).toBe("true");
+    const sidebarNew = [...(container?.querySelectorAll<HTMLButtonElement>("button") ?? [])]
+      .find((button) => button.textContent === "home.newProject");
+    await act(async () => sidebarNew?.dispatchEvent(
+      new KeyboardEvent("keydown", { key: "Enter", bubbles: true }),
+    ));
+    expect(mocks.openProjectPath).not.toHaveBeenCalled();
+
+    await act(async () => card?.dispatchEvent(
+      new KeyboardEvent("keydown", { key: "Enter", bubbles: true }),
+    ));
+    expect(mocks.openProjectPath).toHaveBeenCalledTimes(1);
+    expect(mocks.openProjectPath).toHaveBeenLastCalledWith(PROJECT_PATH);
+
+    mocks.openProjectPath.mockClear();
+    await act(async () => card?.click());
+    expect(card?.getAttribute("aria-pressed")).toBe("true");
+    expect(mocks.openProjectPath).not.toHaveBeenCalled();
+
+    await act(async () => card?.dispatchEvent(new MouseEvent("dblclick", { bubbles: true })));
+    expect(mocks.openProjectPath).toHaveBeenCalledTimes(1);
+    expect(mocks.openProjectPath).toHaveBeenLastCalledWith(PROJECT_PATH);
+  });
+});
diff --git a/web/src/components/home/HomeView.test.tsx b/web/src/components/home/HomeView.test.tsx
new file mode 100644
index 00000000..8066d948
--- /dev/null
+++ b/web/src/components/home/HomeView.test.tsx
@@ -0,0 +1,247 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  newProjectAndEnter: vi.fn(),
+  openProjectPath: vi.fn(),
+  openProjectViaDialog: vi.fn(),
+  openSampleProject: vi.fn(),
+}));
+
+vi.mock("../../i18n", () => ({ useT: () => (key: string) => key }));
+vi.mock("../../lib/api", () => ({ isTauri: false }));
+vi.mock("../../lib/asset", () => ({ assetUrl: (path: string | null) => path }));
+vi.mock("../../store/projectActions", () => mocks);
+
+import { useRecentStore } from "../../store/recentStore";
+import {
+  HOME_NOTICE_STORAGE_KEY,
+  HOME_NOTICE_VERSION,
+  HomeView,
+} from "./HomeView";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let root: Root;
+let container: HTMLDivElement;
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  for (const mock of Object.values(mocks)) mock.mockResolvedValue(undefined);
+  localStorage.clear();
+  localStorage.setItem(HOME_NOTICE_STORAGE_KEY, HOME_NOTICE_VERSION);
+  useRecentStore.setState({
+    recents: [{ path: "/tmp/Existing.opentake", name: "Existing", openedAt: 1 }],
+  });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+});
+
+it("new_open_sample_register_only_after_success_and_route_tutorial", async () => {
+  let finish!: () => void;
+  mocks.openSampleProject.mockReturnValueOnce(new Promise<void>((resolve) => {
+    finish = resolve;
+  }));
+  await act(async () => root.render(<HomeView />));
+
+  const tutorial = [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.sampleTutorial");
+  expect(tutorial).toBeDefined();
+
+  await act(async () => tutorial?.click());
+  expect(mocks.openSampleProject).toHaveBeenCalledWith("quick-tutorial", true);
+  expect(useRecentStore.getState().recents.map(({ name }) => name)).toEqual(["Existing"]);
+  expect(tutorial?.disabled).toBe(true);
+
+  await act(async () => finish());
+  await vi.waitFor(() => expect(tutorial?.disabled).toBe(false));
+  expect(useRecentStore.getState().recents.map(({ name }) => name)).toEqual(["Existing"]);
+});
+
+it("project_card_renders_thumbnail_relative_time_and_missing_state", async () => {
+  useRecentStore.setState({
+    recents: [{
+      path: "/tmp/Metadata.opentake",
+      name: "Metadata",
+      openedAt: Date.now() - 86_400_000,
+      modifiedAt: Date.now(),
+      thumbnailPath: "/tmp/Metadata.opentake/thumbnail.jpg",
+      missing: false,
+    }],
+  });
+  await act(async () => root.render(<HomeView />));
+
+  expect(container.querySelector<HTMLImageElement>("img")?.src).toContain("thumbnail.jpg");
+  expect(container.textContent).toContain("home.relative.today");
+
+  act(() => useRecentStore.setState({
+    recents: [{
+      path: "/tmp/Metadata.opentake",
+      name: "Metadata",
+      openedAt: Date.now() - 86_400_000,
+      modifiedAt: Date.now(),
+      thumbnailPath: "/tmp/Metadata.opentake/thumbnail.jpg",
+      missing: true,
+    }],
+  }));
+  await vi.waitFor(() => expect(container.textContent).toContain("home.fileMissing"));
+  expect(container.querySelector("img")).toBeNull();
+});
+
+it("missing_card_reveal_remove_and_trash_states", async () => {
+  const reveal = vi.fn().mockResolvedValue(undefined);
+  const trash = vi
+    .fn()
+    .mockRejectedValueOnce(new Error("permission denied"))
+    .mockImplementationOnce(async () => {
+      useRecentStore.setState({ recents: [] });
+    });
+  const remove = vi
+    .fn()
+    .mockRejectedValueOnce(new Error("registry is read-only"))
+    .mockImplementationOnce(async () => {
+      useRecentStore.setState({ recents: [] });
+    });
+  useRecentStore.setState({
+    recents: [{
+      path: "/tmp/Missing.opentake",
+      name: "Missing",
+      openedAt: 1,
+      missing: true,
+    }],
+    reveal,
+    trash,
+    remove,
+  });
+  await act(async () => root.render(<HomeView />));
+
+  expect(container.textContent).toContain("home.fileMissing");
+  await act(async () => container.querySelector<HTMLButtonElement>(
+    "button[aria-label='home.projectActions']",
+  )?.click());
+  expect(container.textContent).toContain("home.revealInFinder");
+  expect(container.textContent).toContain("home.removeFromRecents");
+  expect(container.textContent).toContain("home.moveToTrash");
+
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent?.includes("home.revealInFinder"))?.click());
+  expect(reveal).toHaveBeenCalledWith("/tmp/Missing.opentake");
+
+  await act(async () => container.querySelector<HTMLButtonElement>(
+    "button[aria-label='home.projectActions']",
+  )?.click());
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent?.includes("home.moveToTrash"))?.click());
+  expect(container.textContent).toContain("home.confirmTrashBody");
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent?.includes("home.moveToTrash"))?.click());
+  await vi.waitFor(() => expect(container.textContent).toContain("home.trashFailed"));
+  expect(useRecentStore.getState().recents).toHaveLength(1);
+
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent?.includes("home.moveToTrash"))?.click());
+  await vi.waitFor(() => expect(useRecentStore.getState().recents).toEqual([]));
+
+  act(() => useRecentStore.setState({
+    recents: [{
+      path: "/tmp/Missing.opentake",
+      name: "Missing",
+      openedAt: 1,
+      missing: true,
+    }],
+  }));
+  await vi.waitFor(() => expect(container.textContent).toContain("home.fileMissing"));
+  await act(async () => container.querySelector<HTMLButtonElement>(
+    "button[aria-label='home.projectActions']",
+  )?.click());
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.removeFromRecents")?.click());
+  await vi.waitFor(() => expect(container.textContent).toContain("home.removeFailed"));
+  expect(useRecentStore.getState().recents).toHaveLength(1);
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.removeFromRecents")?.click());
+  await vi.waitFor(() => expect(remove).toHaveBeenCalledTimes(2));
+  expect(useRecentStore.getState().recents).toEqual([]);
+});
+
+it("upstream_home_children_close_one_composite_acceptance", async () => {
+  localStorage.removeItem(HOME_NOTICE_STORAGE_KEY);
+  useRecentStore.setState({ recents: [] });
+  await act(async () => root.render(<HomeView />));
+
+  expect(container.querySelector("aside")).not.toBeNull();
+  expect(container.textContent).toContain("home.samples");
+  expect(container.textContent).toContain("home.sampleDemo");
+  expect(container.textContent).toContain("home.welcome");
+  expect(container.querySelector('[role="dialog"][aria-modal="true"]')?.textContent).toContain(
+    "home.welcomeOverlayTitle",
+  );
+  const welcomeDismiss = [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.welcomeOverlayStart");
+  expect(document.activeElement).toBe(welcomeDismiss);
+  await act(async () => window.dispatchEvent(
+    new KeyboardEvent("keydown", { key: "Escape", bubbles: true }),
+  ));
+  expect(localStorage.getItem(HOME_NOTICE_STORAGE_KEY)).toBe(HOME_NOTICE_VERSION);
+  expect(container.querySelector('[role="dialog"][aria-modal="true"]')).toBeNull();
+
+  await act(async () => root.unmount());
+  container.replaceChildren();
+  root = createRoot(container);
+  localStorage.setItem(HOME_NOTICE_STORAGE_KEY, "0.9.0");
+  const reveal = vi.fn().mockResolvedValue(undefined);
+  const trash = vi.fn().mockResolvedValue(undefined);
+  useRecentStore.setState({
+    recents: [
+      { path: "/tmp/Existing.opentake", name: "Existing", openedAt: Date.now() },
+      { path: "/tmp/Missing.opentake", name: "Missing", openedAt: 1, missing: true },
+    ],
+    reveal,
+    trash,
+  });
+  await act(async () => root.render(<HomeView />));
+
+  const updateDialog = container.querySelector('[role="dialog"][aria-modal="true"]');
+  expect(updateDialog?.textContent).toContain("home.newInVersion");
+  expect(updateDialog?.textContent).toContain("home.updateOverlayBody");
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.updateOverlayDismiss")?.click());
+
+  expect(container.querySelector<HTMLButtonElement>('button[aria-label="Existing"]')).not.toBeNull();
+  const missingCard = container.querySelector<HTMLButtonElement>(
+    'button[aria-label="Missing · home.fileMissing"]',
+  );
+  expect(missingCard).not.toBeNull();
+  await act(async () => missingCard?.parentElement?.dispatchEvent(
+    new MouseEvent("contextmenu", { bubbles: true }),
+  ));
+  expect(container.textContent).toContain("home.revealInFinder");
+  expect(container.textContent).toContain("home.moveToTrash");
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent?.includes("home.moveToTrash"))?.click());
+  expect(container.textContent).toContain("home.confirmTrashBody");
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "common.cancel")?.click());
+  expect(trash).not.toHaveBeenCalled();
+
+  const existingCard = container.querySelector<HTMLButtonElement>('button[aria-label="Existing"]')!;
+  await act(async () => existingCard.focus());
+  await act(async () => existingCard.dispatchEvent(
+    new KeyboardEvent("keydown", { key: "Enter", bubbles: true }),
+  ));
+  expect(mocks.openProjectPath).toHaveBeenCalledWith("/tmp/Existing.opentake");
+
+  await act(async () => [...container.querySelectorAll<HTMLButtonElement>("button")]
+    .find((button) => button.textContent === "home.sampleDemo")?.click());
+  expect(mocks.openSampleProject).toHaveBeenCalledWith("product-demo", false);
+});
diff --git a/web/src/components/home/HomeView.tsx b/web/src/components/home/HomeView.tsx
index e695de5b..d4e15f06 100644
--- a/web/src/components/home/HomeView.tsx
+++ b/web/src/components/home/HomeView.tsx
@@ -1,15 +1,47 @@
-import { useEffect, useState, type CSSProperties } from "react";
-import { Plus, FolderOpen, Settings as SettingsIcon, Film, Trash2, Library } from "lucide-react";
+import { useEffect, useRef, useState, type CSSProperties } from "react";
+import {
+  Plus,
+  FolderOpen,
+  Settings as SettingsIcon,
+  Film,
+  Trash2,
+  Library,
+  MoreHorizontal,
+  Sparkles,
+} from "lucide-react";
 import { Icon } from "../ui/Icon";
-import { useT } from "../../i18n";
+import { useT, type TFunction } from "../../i18n";
+import { assetUrl } from "../../lib/asset";
 import { useEditorUiStore } from "../../store/uiStore";
 import { useRecentStore, type RecentProject } from "../../store/recentStore";
 import {
   newProjectAndEnter,
+  openSampleProject,
   openProjectViaDialog,
   openProjectPath,
 } from "../../store/projectActions";
 
+export function formatProjectRelativeTime(
+  t: TFunction,
+  timestamp: number,
+  now = Date.now(),
+): string {
+  const then = new Date(timestamp);
+  const current = new Date(now);
+  const thenDay = new Date(then.getFullYear(), then.getMonth(), then.getDate()).getTime();
+  const currentDay = new Date(
+    current.getFullYear(),
+    current.getMonth(),
+    current.getDate(),
+  ).getTime();
+  const days = Math.max(0, Math.round((currentDay - thenDay) / 86_400_000));
+  if (days === 0) return t("home.relative.today");
+  if (days === 1) return t("home.relative.yesterday");
+  if (days < 7) return t("home.relative.daysAgo", { count: days });
+  if (days < 35) return t("home.relative.weeksAgo", { count: Math.floor(days / 7) });
+  return t("home.relative.monthsAgo", { count: Math.max(1, Math.floor(days / 30)) });
+}
+
 const homeShellStyle: CSSProperties = {
   display: "flex",
   height: "100%",
@@ -48,8 +80,68 @@ const homeWorkspaceStyle: CSSProperties = {
 
 const subtleTransition = "background-color var(--anim-hover) var(--ease-out), border-color var(--anim-hover) var(--ease-out), color var(--anim-hover) var(--ease-out)";
 
+type ProjectAction = "new" | "open" | "sample" | null;
+
+export const HOME_NOTICE_STORAGE_KEY = "opentake.home.lastSeenVersion";
+export const HOME_NOTICE_VERSION = __APP_VERSION__;
+
+type HomeNotice = "welcome" | "whatsNew" | null;
+
+export function resolveHomeNotice(
+  lastSeenVersion: string | null,
+  hasRecentProjects: boolean,
+): Exclude<HomeNotice, null> | null {
+  if (lastSeenVersion === HOME_NOTICE_VERSION) return null;
+  return lastSeenVersion === null && !hasRecentProjects ? "welcome" : "whatsNew";
+}
+
+function loadHomeNotice(hasRecentProjects: boolean): HomeNotice {
+  try {
+    return resolveHomeNotice(localStorage.getItem(HOME_NOTICE_STORAGE_KEY), hasRecentProjects);
+  } catch {
+    return hasRecentProjects ? "whatsNew" : "welcome";
+  }
+}
+
+function persistHomeNoticeSeen() {
+  try {
+    localStorage.setItem(HOME_NOTICE_STORAGE_KEY, HOME_NOTICE_VERSION);
+  } catch {
+    // Storage can be unavailable in privacy-restricted browser previews. The
+    // notice still dismisses for this session; the editor remains usable.
+  }
+}
+
 export function HomeView() {
   const recents = useRecentStore((s) => s.recents);
+  const [projectAction, setProjectAction] = useState<ProjectAction>(null);
+  const [homeNotice, setHomeNotice] = useState<HomeNotice>(() =>
+    loadHomeNotice(recents.length > 0),
+  );
+  const projectActionRef = useRef<ProjectAction>(null);
+
+  const dismissHomeNotice = () => {
+    persistHomeNoticeSeen();
+    setHomeNotice(null);
+  };
+
+  const runProjectAction = async (
+    action: Exclude<ProjectAction, null>,
+    operation: () => Promise<void>,
+  ) => {
+    if (projectActionRef.current) return;
+    projectActionRef.current = action;
+    setProjectAction(action);
+    try {
+      await operation();
+    } catch {
+      // Project actions own their localized error toast;
+      // keep the UI gesture handled so a native rejection is not unhandled.
+    } finally {
+      projectActionRef.current = null;
+      setProjectAction(null);
+    }
+  };
 
   // Validate recent projects on mount to filter out folders deleted on disk
   useEffect(() => {
@@ -58,30 +150,188 @@ export function HomeView() {
 
   return (
     <div style={homeShellStyle}>
-      <Sidebar />
+      <Sidebar
+        projectAction={projectAction}
+        onNew={() => void runProjectAction("new", newProjectAndEnter)}
+        onOpen={() => void runProjectAction("open", openProjectViaDialog)}
+      />
       <main style={homeMainStyle}>
         <section style={homeWorkspaceStyle}>
-          {recents.length === 0 ? <EmptyLauncher /> : <ProjectLauncher recents={recents} />}
+          <SampleProjectsStrip
+            busy={projectAction !== null}
+            onOpen={(slug, tutorial) =>
+              void runProjectAction("sample", () => openSampleProject(slug, tutorial))
+            }
+          />
+          {recents.length === 0 ? (
+            <EmptyLauncher
+              projectAction={projectAction}
+              onNew={() => void runProjectAction("new", newProjectAndEnter)}
+              onOpen={() => void runProjectAction("open", openProjectViaDialog)}
+            />
+          ) : (
+            <ProjectLauncher
+              recents={recents}
+              projectAction={projectAction}
+              onNew={() => void runProjectAction("new", newProjectAndEnter)}
+              onOpen={() => void runProjectAction("open", openProjectViaDialog)}
+              onOpenPath={(path) =>
+                void runProjectAction("open", () => openProjectPath(path))
+              }
+            />
+          )}
         </section>
       </main>
+      {homeNotice && <HomeNoticeDialog kind={homeNotice} onDismiss={dismissHomeNotice} />}
     </div>
   );
 }
 
-function Sidebar() {
+function HomeNoticeDialog({
+  kind,
+  onDismiss,
+}: {
+  kind: Exclude<HomeNotice, null>;
+  onDismiss: () => void;
+}) {
+  const t = useT();
+  const buttonRef = useRef<HTMLButtonElement>(null);
+
+  useEffect(() => {
+    buttonRef.current?.focus();
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key !== "Escape") return;
+      event.preventDefault();
+      onDismiss();
+    };
+    window.addEventListener("keydown", onKeyDown);
+    return () => window.removeEventListener("keydown", onKeyDown);
+  }, [onDismiss]);
+
+  const isWelcome = kind === "welcome";
+  return (
+    <div
+      data-testid="home-notice-backdrop"
+      style={{
+        position: "fixed",
+        inset: 0,
+        zIndex: 40,
+        display: "grid",
+        placeItems: "center",
+        padding: "var(--space-xl)",
+        background: "rgba(0,0,0,0.62)",
+        backdropFilter: "blur(8px)",
+      }}
+    >
+      <section
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="home-notice-title"
+        style={{
+          width: "min(520px, 100%)",
+          padding: "var(--space-xl-xxl)",
+          border: "1px solid var(--home-border)",
+          borderRadius: "var(--radius-xl)",
+          background: "var(--home-popover)",
+          boxShadow: "var(--home-panel-shadow)",
+          color: "var(--home-foreground)",
+        }}
+      >
+        <Icon icon={Sparkles} size={24} />
+        <h1 id="home-notice-title" style={{ margin: "var(--space-md) 0 var(--space-sm)", fontSize: "var(--fs-title2)" }}>
+          {isWelcome
+            ? t("home.welcomeOverlayTitle")
+            : t("home.newInVersion", { version: HOME_NOTICE_VERSION })}
+        </h1>
+        <p style={{ margin: 0, color: "var(--home-muted-foreground)", lineHeight: 1.6 }}>
+          {isWelcome ? t("home.welcomeOverlayBody") : t("home.updateOverlayBody")}
+        </p>
+        <button
+          ref={buttonRef}
+          type="button"
+          onClick={onDismiss}
+          style={{
+            marginTop: "var(--space-xl)",
+            minHeight: 34,
+            padding: "0 var(--space-lg-xl)",
+            borderRadius: "var(--radius-md)",
+            background: "var(--home-primary)",
+            color: "var(--home-primary-foreground)",
+            fontWeight: "var(--fw-semibold)",
+          }}
+        >
+          {isWelcome ? t("home.welcomeOverlayStart") : t("home.updateOverlayDismiss")}
+        </button>
+      </section>
+    </div>
+  );
+}
+
+const SAMPLE_PROJECTS = [
+  { slug: "product-demo", label: "home.sampleDemo", tutorial: false },
+  { slug: "quick-tutorial", label: "home.sampleTutorial", tutorial: true },
+  { slug: "template-project", label: "home.sampleTemplate", tutorial: false },
+] as const;
+
+function SampleProjectsStrip({
+  busy,
+  onOpen,
+}: {
+  busy: boolean;
+  onOpen: (slug: string, tutorial: boolean) => void;
+}) {
+  const t = useT();
+  return (
+    <section
+      aria-labelledby="home-samples-heading"
+      style={{ padding: "var(--titlebar-safe-top) var(--space-xl-xxl) 0" }}
+    >
+      <h2
+        id="home-samples-heading"
+        style={{ margin: "0 0 var(--space-sm)", fontSize: "var(--fs-xs)", fontWeight: 500 }}
+      >
+        {t("home.samples")}
+      </h2>
+      <div style={{ display: "flex", gap: "var(--space-sm)" }}>
+        {SAMPLE_PROJECTS.map((sample) => (
+          <button
+            key={sample.slug}
+            type="button"
+            disabled={busy}
+            aria-busy={busy || undefined}
+            onClick={() => onOpen(sample.slug, sample.tutorial)}
+            className="hover-area"
+            style={{
+              minHeight: 34,
+              padding: "0 var(--space-md)",
+              border: "1px solid var(--home-border)",
+              borderRadius: "var(--radius-md)",
+              background: "rgba(255,255,255,0.018)",
+              color: "var(--home-muted-foreground)",
+              opacity: busy ? 0.55 : 1,
+            }}
+          >
+            {t(sample.label)}
+          </button>
+        ))}
+      </div>
+    </section>
+  );
+}
+
+function Sidebar({
+  projectAction,
+  onNew,
+  onOpen,
+}: {
+  projectAction: ProjectAction;
+  onNew: () => void;
+  onOpen: () => void;
+}) {
   const t = useT();
   const setView = useEditorUiStore((s) => s.setView);
   const setSettingsOpen = useEditorUiStore((s) => s.setSettingsOpen);
-  const [opening, setOpening] = useState(false);
-
-  const handleOpen = async () => {
-    setOpening(true);
-    try {
-      await openProjectViaDialog();
-    } finally {
-      setOpening(false);
-    }
-  };
+  const busy = projectAction !== null;
 
   return (
     <aside data-tauri-drag-region style={homeSidebarStyle}>
@@ -99,11 +349,18 @@ function Sidebar() {
       </div>
 
       <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
-        <SidebarRow primary icon={Plus} label={t("home.newProject")} onClick={() => void newProjectAndEnter()} />
+        <SidebarRow
+          primary
+          icon={Plus}
+          label={projectAction === "new" ? t("home.creating") : t("home.newProject")}
+          onClick={onNew}
+          disabled={busy}
+        />
         <SidebarRow
           icon={FolderOpen}
-          label={opening ? t("home.opening") : t("home.openProject")}
-          onClick={() => void handleOpen()}
+          label={projectAction === "open" ? t("home.opening") : t("home.openProject")}
+          onClick={onOpen}
+          disabled={busy}
         />
       </div>
 
@@ -122,16 +379,20 @@ function SidebarRow({
   label,
   onClick,
   primary = false,
+  disabled = false,
 }: {
   icon: typeof Plus;
   label: string;
   onClick: () => void;
   primary?: boolean;
+  disabled?: boolean;
 }) {
   return (
     <button
       type="button"
       onClick={onClick}
+      disabled={disabled}
+      aria-busy={disabled || undefined}
       className="hover-area"
       style={{
         display: "flex",
@@ -147,6 +408,7 @@ function SidebarRow({
         fontWeight: "var(--fw-medium)",
         textAlign: "left",
         transition: subtleTransition,
+        opacity: disabled ? 0.55 : 1,
       }}
     >
       <Icon icon={icon} size={15} />
@@ -155,18 +417,17 @@ function SidebarRow({
   );
 }
 
-function EmptyLauncher() {
+function EmptyLauncher({
+  projectAction,
+  onNew,
+  onOpen,
+}: {
+  projectAction: ProjectAction;
+  onNew: () => void;
+  onOpen: () => void;
+}) {
   const t = useT();
-  const [opening, setOpening] = useState(false);
-
-  const handleOpen = async () => {
-    setOpening(true);
-    try {
-      await openProjectViaDialog();
-    } finally {
-      setOpening(false);
-    }
-  };
+  const busy = projectAction !== null;
 
   return (
     <section
@@ -231,8 +492,17 @@ function EmptyLauncher() {
           {t("app.tagline")}
         </p>
         <div style={{ display: "flex", gap: "var(--space-sm)", marginTop: "var(--space-xl)" }}>
-          <LauncherButton primary label={t("home.newProject")} onClick={() => void newProjectAndEnter()} />
-          <LauncherButton label={opening ? t("home.opening") : t("home.openProject")} onClick={() => void handleOpen()} />
+          <LauncherButton
+            primary
+            label={projectAction === "new" ? t("home.creating") : t("home.newProject")}
+            onClick={onNew}
+            disabled={busy}
+          />
+          <LauncherButton
+            label={projectAction === "open" ? t("home.opening") : t("home.openProject")}
+            onClick={onOpen}
+            disabled={busy}
+          />
         </div>
         <div
           style={{
@@ -253,15 +523,19 @@ function LauncherButton({
   label,
   onClick,
   primary = false,
+  disabled = false,
 }: {
   label: string;
   onClick: () => void;
   primary?: boolean;
+  disabled?: boolean;
 }) {
   return (
     <button
       type="button"
       onClick={onClick}
+      disabled={disabled}
+      aria-busy={disabled || undefined}
       style={{
         height: 34,
         padding: "0 var(--space-lg-xl)",
@@ -272,6 +546,7 @@ function LauncherButton({
         fontSize: "var(--fs-sm-md)",
         fontWeight: primary ? "var(--fw-semibold)" : "var(--fw-medium)",
         transition: subtleTransition,
+        opacity: disabled ? 0.55 : 1,
       }}
     >
       {label}
@@ -279,34 +554,44 @@ function LauncherButton({
   );
 }
 
-function ProjectLauncher({ recents }: { recents: RecentProject[] }) {
+function ProjectLauncher({
+  recents,
+  projectAction,
+  onNew,
+  onOpen,
+  onOpenPath,
+}: {
+  recents: RecentProject[];
+  projectAction: ProjectAction;
+  onNew: () => void;
+  onOpen: () => void;
+  onOpenPath: (path: string) => void;
+}) {
   const t = useT();
   const [selectedPath, setSelectedPath] = useState<string | null>(null);
-  const [opening, setOpening] = useState(false);
-
-  const handleOpen = async () => {
-    setOpening(true);
-    try {
-      await openProjectViaDialog();
-    } finally {
-      setOpening(false);
-    }
-  };
+  const busy = projectAction !== null;
 
   // Listen to KeyDown to open project when selected + Enter is pressed
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
-      if (e.key === "Enter" && selectedPath) {
+      if (e.key === "Enter" && selectedPath && !busy) {
+        const target = e.target instanceof Element ? e.target : null;
+        const interactiveTarget = target?.closest(
+          "button, a, input, textarea, select, [role='button'], [contenteditable='true']",
+        );
+        if (interactiveTarget && !target?.closest(".home-project-card")) return;
+        e.preventDefault();
         if (selectedPath === "new") {
-          void newProjectAndEnter();
+          onNew();
         } else {
-          void openProjectPath(selectedPath);
+          const selected = recents.find((entry) => entry.path === selectedPath);
+          if (!selected?.missing) onOpenPath(selectedPath);
         }
       }
     };
     window.addEventListener("keydown", handleKeyDown);
     return () => window.removeEventListener("keydown", handleKeyDown);
-  }, [selectedPath]);
+  }, [busy, onNew, onOpenPath, recents, selectedPath]);
 
   return (
     <div
@@ -320,7 +605,7 @@ function ProjectLauncher({ recents }: { recents: RecentProject[] }) {
         flexDirection: "column",
       }}
     >
-      <ProjectHero opening={opening} onOpen={() => void handleOpen()} />
+      <ProjectHero projectAction={projectAction} onNew={onNew} onOpen={onOpen} />
       <div
         style={{
           display: "flex",
@@ -352,11 +637,11 @@ function ProjectLauncher({ recents }: { recents: RecentProject[] }) {
             key={entry.path}
             entry={entry}
             selected={selectedPath === entry.path}
-            onClick={(e) => {
-              e.stopPropagation();
-              setSelectedPath(entry.path);
+            disabled={busy}
+            onSelect={() => setSelectedPath(entry.path)}
+            onDoubleClick={() => {
+              if (!entry.missing) onOpenPath(entry.path);
             }}
-            onDoubleClick={() => void openProjectPath(entry.path)}
           />
         ))}
       </div>
@@ -364,8 +649,17 @@ function ProjectLauncher({ recents }: { recents: RecentProject[] }) {
   );
 }
 
-function ProjectHero({ opening, onOpen }: { opening: boolean; onOpen: () => void }) {
+function ProjectHero({
+  projectAction,
+  onNew,
+  onOpen,
+}: {
+  projectAction: ProjectAction;
+  onNew: () => void;
+  onOpen: () => void;
+}) {
   const t = useT();
+  const busy = projectAction !== null;
 
   return (
     <section
@@ -418,8 +712,17 @@ function ProjectHero({ opening, onOpen }: { opening: boolean; onOpen: () => void
         {t("app.tagline")}
       </p>
       <div style={{ display: "flex", gap: "var(--space-sm)", marginTop: "var(--space-xl)" }}>
-        <LauncherButton primary label={t("home.newProject")} onClick={() => void newProjectAndEnter()} />
-        <LauncherButton label={opening ? t("home.opening") : t("home.openProject")} onClick={onOpen} />
+        <LauncherButton
+          primary
+          label={projectAction === "new" ? t("home.creating") : t("home.newProject")}
+          onClick={onNew}
+          disabled={busy}
+        />
+        <LauncherButton
+          label={projectAction === "open" ? t("home.opening") : t("home.openProject")}
+          onClick={onOpen}
+          disabled={busy}
+        />
       </div>
     </section>
   );
@@ -428,104 +731,216 @@ function ProjectHero({ opening, onOpen }: { opening: boolean; onOpen: () => void
 function ProjectGridCard({
   entry,
   selected,
-  onClick,
+  disabled,
+  onSelect,
   onDoubleClick,
 }: {
   entry: RecentProject;
   selected: boolean;
-  onClick: (e: React.MouseEvent) => void;
+  disabled: boolean;
+  onSelect: () => void;
   onDoubleClick: () => void;
 }) {
   const t = useT();
   const remove = useRecentStore((s) => s.remove);
+  const reveal = useRecentStore((s) => s.reveal);
+  const trash = useRecentStore((s) => s.trash);
   const [hovered, setHovered] = useState(false);
+  const [actionsOpen, setActionsOpen] = useState(false);
+  const [confirmTrash, setConfirmTrash] = useState(false);
+  const [pending, setPending] = useState<"reveal" | "remove" | "trash" | null>(null);
+  const [actionError, setActionError] = useState<string | null>(null);
+  const [thumbnailFailed, setThumbnailFailed] = useState(false);
+
+  const actionsVisible = hovered || actionsOpen || confirmTrash || actionError !== null;
+  const coverUrl = entry.missing || thumbnailFailed ? null : assetUrl(entry.thumbnailPath);
+  const modifiedLabel = formatProjectRelativeTime(t, entry.modifiedAt ?? entry.openedAt);
+
+  useEffect(
+    () => setThumbnailFailed(false),
+    [entry.missing, entry.modifiedAt, entry.thumbnailPath],
+  );
+
+  const runReveal = async () => {
+    setPending("reveal");
+    setActionError(null);
+    try {
+      await reveal(entry.path);
+      setActionsOpen(false);
+    } catch (error) {
+      setActionError(t("home.revealFailed", {
+        error: error instanceof Error ? error.message : String(error),
+      }));
+    } finally {
+      setPending(null);
+    }
+  };
+
+  const runTrash = async () => {
+    setPending("trash");
+    setActionError(null);
+    try {
+      await trash(entry.path);
+      setConfirmTrash(false);
+      setActionsOpen(false);
+    } catch (error) {
+      setActionError(t("home.trashFailed", {
+        error: error instanceof Error ? error.message : String(error),
+      }));
+    } finally {
+      setPending(null);
+    }
+  };
 
-  const cleanDisplayPath = entry.path.replace(/^\/Users\/[^\/]+/, "~");
+  const runRemove = async () => {
+    setPending("remove");
+    setActionError(null);
+    try {
+      await remove(entry.path);
+      setActionsOpen(false);
+    } catch (error) {
+      setActionError(t("home.removeFailed", {
+        error: error instanceof Error ? error.message : String(error),
+      }));
+    } finally {
+      setPending(null);
+    }
+  };
 
   return (
     <div
-      onClick={onClick}
-      onDoubleClick={onDoubleClick}
       onMouseEnter={() => setHovered(true)}
       onMouseLeave={() => setHovered(false)}
-      className="home-project-card"
+      onContextMenu={(event) => {
+        event.preventDefault();
+        event.stopPropagation();
+        setActionsOpen(true);
+      }}
       style={{
         position: "relative",
         minWidth: 0,
-        minHeight: 96,
-        padding: "var(--space-md)",
-        borderRadius: "var(--radius-md)",
-        background: selected ? "var(--home-selected)" : "rgba(255,255,255,0.018)",
-        border: selected ? "1px solid rgba(255,255,255,0.32)" : "1px solid var(--home-border)",
-        color: "var(--home-foreground)",
-        transition: subtleTransition,
-        cursor: "default",
       }}
     >
-      <div
+      <button
+        type="button"
+        disabled={disabled}
+        aria-label={entry.missing ? `${entry.name} · ${t("home.fileMissing")}` : entry.name}
+        aria-pressed={selected}
+        aria-describedby={entry.missing ? `missing-${entry.path}` : undefined}
+        onClick={(event) => {
+          event.stopPropagation();
+          onSelect();
+        }}
+        onFocus={onSelect}
+        onDoubleClick={onDoubleClick}
+        className="home-project-card"
         style={{
-          display: "flex",
-          flexDirection: "column",
-          alignItems: "flex-start",
-          gap: "var(--space-md)",
-          minWidth: 0,
           width: "100%",
+          minHeight: 96,
+          padding: "var(--space-md)",
+          borderRadius: "var(--radius-md)",
+          background: selected ? "var(--home-selected)" : "rgba(255,255,255,0.018)",
+          border: selected ? "1px solid rgba(255,255,255,0.32)" : "1px solid var(--home-border)",
+          color: "var(--home-foreground)",
+          transition: subtleTransition,
+          cursor: "default",
+          textAlign: "left",
+          opacity: disabled ? 0.55 : 1,
         }}
       >
         <div
           style={{
-            width: 24,
-            height: 24,
-            flex: "0 0 auto",
-            display: "inline-flex",
-            alignItems: "center",
-            justifyContent: "center",
-            borderRadius: "var(--radius-md)",
-            background: "var(--home-muted)",
-            color: "var(--home-muted-foreground)",
+            display: "flex",
+            flexDirection: "column",
+            alignItems: "flex-start",
+            gap: "var(--space-md)",
+            minWidth: 0,
+            width: "100%",
           }}
         >
-          <Icon icon={Film} size={13} />
-        </div>
-        <div style={{ minWidth: 0, width: "100%" }}>
           <div
             style={{
-              fontSize: "var(--fs-sm-md)",
-              color: "var(--home-foreground)",
-              fontWeight: selected ? "var(--fw-semibold)" : "var(--fw-medium)",
-              overflow: "hidden",
-              textOverflow: "ellipsis",
-              whiteSpace: "nowrap",
-            }}
-          >
-            {entry.name}
-          </div>
-          <div
-            className="tabular"
-            title={entry.path}
-            style={{
-              marginTop: "var(--space-xs)",
-              fontSize: "var(--fs-xs)",
+              width: "100%",
+              height: 48,
+              flex: "0 0 auto",
+              display: "inline-flex",
+              alignItems: "center",
+              justifyContent: "center",
+              borderRadius: "var(--radius-md)",
+              background: "var(--home-muted)",
               color: "var(--home-muted-foreground)",
               overflow: "hidden",
-              textOverflow: "ellipsis",
-              whiteSpace: "nowrap",
             }}
           >
-            {cleanDisplayPath}
+            {coverUrl ? (
+              <img
+                src={coverUrl}
+                alt=""
+                onError={() => setThumbnailFailed(true)}
+                style={{ width: "100%", height: "100%", objectFit: "cover" }}
+              />
+            ) : <Icon icon={Film} size={16} />}
+          </div>
+          <div style={{ minWidth: 0, width: "100%" }}>
+            <div
+              style={{
+                fontSize: "var(--fs-sm-md)",
+                color: "var(--home-foreground)",
+                fontWeight: selected ? "var(--fw-semibold)" : "var(--fw-medium)",
+                overflow: "hidden",
+                textOverflow: "ellipsis",
+                whiteSpace: "nowrap",
+              }}
+            >
+              {entry.name}
+            </div>
+            <div
+              className="tabular"
+              title={entry.path}
+              style={{
+                marginTop: "var(--space-xs)",
+                fontSize: "var(--fs-xs)",
+                color: "var(--home-muted-foreground)",
+                overflow: "hidden",
+                textOverflow: "ellipsis",
+                whiteSpace: "nowrap",
+              }}
+            >
+              {entry.missing ? (
+                <span id={`missing-${entry.path}`} style={{ color: "var(--status-error)" }}>
+                  {t("home.fileMissing")}
+                </span>
+              ) : modifiedLabel}
+            </div>
+            {entry.missing && (
+              <div
+                className="tabular"
+                style={{
+                  marginTop: 2,
+                  fontSize: "var(--fs-xs)",
+                  color: "var(--home-muted-foreground)",
+                }}
+              >
+                {modifiedLabel}
+              </div>
+            )}
           </div>
         </div>
-      </div>
+      </button>
 
-      {hovered && (
+      {!disabled && (
         <button
           type="button"
-          title={t("home.remove")}
-          aria-label={t("home.remove")}
+          title={t("home.projectActions")}
+          aria-label={t("home.projectActions")}
+          aria-expanded={actionsOpen || confirmTrash}
           onClick={(e) => {
             e.stopPropagation();
-            remove(entry.path);
+            setActionsOpen((open) => !open);
+            setConfirmTrash(false);
+            setActionError(null);
           }}
+          onFocus={() => setHovered(true)}
           className="hover-area"
           style={{
             position: "absolute",
@@ -538,14 +953,115 @@ function ProjectGridCard({
             justifyContent: "center",
             borderRadius: "var(--radius-md)",
             background: "var(--home-popover)",
-            color: "var(--status-error)",
+            color: "var(--home-muted-foreground)",
+            opacity: actionsVisible ? 1 : 0.62,
             zIndex: 4,
             border: "1px solid var(--home-border)",
           }}
         >
-          <Icon icon={Trash2} size={14} />
+          <Icon icon={MoreHorizontal} size={14} />
+        </button>
+      )}
+
+      {hovered && !disabled && !actionsOpen && !confirmTrash && (
+        <button
+          type="button"
+          title={t("home.remove")}
+          aria-label={t("home.remove")}
+          onClick={(event) => {
+            event.stopPropagation();
+            void runRemove();
+          }}
+          style={{
+            position: "absolute",
+            top: "var(--space-sm)",
+            right: 38,
+            width: 26,
+            height: 26,
+            borderRadius: "var(--radius-md)",
+            border: "1px solid var(--home-border)",
+            background: "var(--home-popover)",
+            color: "var(--status-error)",
+            zIndex: 4,
+          }}
+        >
+          <Icon icon={Trash2} size={13} />
         </button>
       )}
+
+      {(actionsOpen || confirmTrash || actionError) && !disabled && (
+        <div
+          role="dialog"
+          aria-label={confirmTrash ? t("home.confirmTrashTitle") : t("home.projectActions")}
+          onClick={(event) => event.stopPropagation()}
+          style={{
+            position: "absolute",
+            top: 38,
+            right: "var(--space-sm)",
+            width: 220,
+            padding: "var(--space-sm)",
+            borderRadius: "var(--radius-md)",
+            border: "1px solid var(--home-border)",
+            background: "var(--home-popover)",
+            boxShadow: "var(--home-panel-shadow)",
+            zIndex: 8,
+          }}
+        >
+          {confirmTrash ? (
+            <>
+              <div style={{ fontSize: "var(--fs-xs)", lineHeight: 1.45 }}>
+                {t("home.confirmTrashBody", { name: entry.name })}
+              </div>
+              <div style={{ display: "flex", gap: "var(--space-xs)", marginTop: "var(--space-sm)" }}>
+                <button
+                  type="button"
+                  disabled={pending !== null}
+                  onClick={() => void runTrash()}
+                  style={{ color: "var(--status-error)" }}
+                >
+                  <Icon icon={Trash2} size={13} /> {pending === "trash" ? t("home.trashing") : t("home.moveToTrash")}
+                </button>
+                <button
+                  type="button"
+                  disabled={pending !== null}
+                  onClick={() => {
+                    setConfirmTrash(false);
+                    setActionError(null);
+                  }}
+                >
+                  {t("common.cancel")}
+                </button>
+              </div>
+            </>
+          ) : (
+            <div style={{ display: "grid", gap: "var(--space-xs)" }}>
+              <button type="button" disabled={pending !== null} onClick={() => void runReveal()}>
+                <Icon icon={FolderOpen} size={13} /> {pending === "reveal" ? t("home.revealing") : t("home.revealInFinder")}
+              </button>
+              <button
+                type="button"
+                disabled={pending !== null}
+                onClick={() => void runRemove()}
+              >
+                {pending === "remove" ? t("home.removing") : t("home.removeFromRecents")}
+              </button>
+              <button
+                type="button"
+                disabled={pending !== null}
+                onClick={() => setConfirmTrash(true)}
+                style={{ color: "var(--status-error)" }}
+              >
+                <Icon icon={Trash2} size={13} /> {t("home.moveToTrash")}
+              </button>
+            </div>
+          )}
+          {actionError && (
+            <div role="alert" style={{ marginTop: "var(--space-sm)", color: "var(--status-error)", fontSize: "var(--fs-xs)" }}>
+              {actionError}
+            </div>
+          )}
+        </div>
+      )}
     </div>
   );
 }
diff --git a/web/src/components/inspector/AiEditTab.test.tsx b/web/src/components/inspector/AiEditTab.test.tsx
new file mode 100644
index 00000000..32a94433
--- /dev/null
+++ b/web/src/components/inspector/AiEditTab.test.tsx
@@ -0,0 +1,159 @@
+// @vitest-environment happy-dom
+
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { Clip } from "../../lib/types";
+import { AiEditTab, type AiEditProposal } from "./AiEditTab";
+
+function clip(): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "media-1",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 0,
+    durationFrames: 120,
+    trimStartFrame: 0,
+    trimEndFrame: 120,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+  };
+}
+
+afterEach(() => document.body.replaceChildren());
+
+describe("AiEditTab", () => {
+  it("generates_reviews_applies_rejects_and_undoes_one_command", async () => {
+    const proposal: AiEditProposal = {
+      id: "gentle-fade",
+      title: "柔和淡入淡出",
+      explanation: "在片段两端添加 8 帧淡化。",
+      properties: { fadeInFrames: 8, fadeOutFrames: 8 },
+    };
+    const suggest = vi.fn().mockResolvedValue([proposal]);
+    const apply = vi.fn().mockResolvedValue(undefined);
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(
+        <AiEditTab clip={clip()} fps={30} suggest={suggest} onApply={apply} onUndo={undo} />,
+      ),
+    );
+
+    const input = container.querySelector<HTMLTextAreaElement>("textarea")!;
+    await act(async () => {
+      input.value = "让开头和结尾更柔和";
+      input.dispatchEvent(new Event("input", { bubbles: true }));
+    });
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="generate"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(suggest).toHaveBeenCalledOnce();
+    expect(container.textContent).toContain("柔和淡入淡出");
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="reject"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(apply).not.toHaveBeenCalled();
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="generate"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="apply"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(apply).toHaveBeenCalledOnce();
+    expect(apply).toHaveBeenCalledWith("clip-1", proposal.properties);
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="undo"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(undo).toHaveBeenCalledOnce();
+    await act(async () => root.unmount());
+  });
+
+  it("surfaces_generation_failure_without_mutating_the_clip", async () => {
+    const suggest = vi.fn().mockRejectedValue(new Error("suggestion engine unavailable"));
+    const apply = vi.fn();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(<AiEditTab clip={clip()} fps={30} suggest={suggest} onApply={apply} />),
+    );
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="generate"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(container.querySelector('[role="alert"]')?.textContent).toContain(
+      "suggestion engine unavailable",
+    );
+    expect(apply).not.toHaveBeenCalled();
+    await act(async () => root.unmount());
+  });
+
+  it("cancels_an_inflight_suggestion_without_mutating_the_clip", async () => {
+    let requestSignal: AbortSignal | null = null;
+    const suggest = vi.fn(
+      (_clip: Clip, _intent: string, _fps: number, signal: AbortSignal) => {
+        requestSignal = signal;
+        return new Promise<AiEditProposal[]>(() => undefined);
+      },
+    );
+    const apply = vi.fn();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(<AiEditTab clip={clip()} fps={30} suggest={suggest} onApply={apply} />),
+    );
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="generate"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(container.querySelector('[data-action="cancel"]')).not.toBeNull();
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="cancel"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(requestSignal?.aborted).toBe(true);
+    expect(container.querySelector('[data-action="cancel"]')).toBeNull();
+    expect(apply).not.toHaveBeenCalled();
+    await act(async () => root.unmount());
+  });
+});
diff --git a/web/src/components/inspector/AiEditTab.tsx b/web/src/components/inspector/AiEditTab.tsx
new file mode 100644
index 00000000..f9637929
--- /dev/null
+++ b/web/src/components/inspector/AiEditTab.tsx
@@ -0,0 +1,370 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { RotateCcw, Sparkles, Square, X } from "lucide-react";
+import { useT } from "../../i18n";
+import type { Clip, ClipPropertiesReq } from "../../lib/types";
+import * as edit from "../../store/editActions";
+import { Icon } from "../ui/Icon";
+
+export interface AiEditProposal {
+  id: string;
+  title: string;
+  explanation: string;
+  properties: ClipPropertiesReq;
+}
+
+export type AiEditSuggester = (
+  clip: Clip,
+  intent: string,
+  fps: number,
+  signal: AbortSignal,
+) => Promise<AiEditProposal[]>;
+
+/**
+ * Build a deterministic, offline-safe edit proposal. The AI Edit surface is a
+ * proposal/review boundary, not a second editing engine: accepted values still
+ * travel through the shared SetClipProperties command and therefore create one
+ * normal undo entry. A future remote suggester can be injected without changing
+ * that command contract.
+ */
+export const suggestAiEdits: AiEditSuggester = async (clip, intent, fps, signal) => {
+  await Promise.resolve();
+  if (signal.aborted) throw new DOMException("Cancelled", "AbortError");
+
+  const normalized = intent.trim().toLowerCase();
+  const fadeFrames = Math.max(1, Math.min(Math.round(fps * 0.4), Math.floor(clip.durationFrames / 3)));
+  if (/快|紧凑|speed|faster|punch/.test(normalized)) {
+    const speed = Math.min(4, Math.max(0.25, Number((clip.speed * 1.25).toFixed(2))));
+    return [
+      {
+        id: "pace-up",
+        title: "节奏加快 / Faster pacing",
+        explanation: `将速度从 ${clip.speed.toFixed(2)}x 调整为 ${speed.toFixed(2)}x。`,
+        properties: { speed },
+      },
+    ];
+  }
+  if (/淡|柔和|smooth|fade|gentle/.test(normalized)) {
+    return [
+      {
+        id: "gentle-fade",
+        title: "柔和淡入淡出 / Gentle fade",
+        explanation: `在片段两端添加 ${fadeFrames} 帧淡化。`,
+        properties: { fadeInFrames: fadeFrames, fadeOutFrames: fadeFrames },
+      },
+    ];
+  }
+  return [
+    {
+      id: "balanced-polish",
+      title: "平衡优化 / Balanced polish",
+      explanation: `添加 ${fadeFrames} 帧淡入淡出并保持画面不透明度。`,
+      properties: { fadeInFrames: fadeFrames, fadeOutFrames: fadeFrames, opacity: 1 },
+    },
+  ];
+};
+
+type Status = "idle" | "generating" | "review" | "applying" | "applied" | "error";
+
+export function AiEditTab({
+  clip,
+  fps,
+  unavailableReason,
+  suggest = suggestAiEdits,
+  onApply = (clipId, properties) => edit.setClipProperties([clipId], properties),
+  onUndo = edit.undo,
+}: {
+  clip: Clip;
+  fps: number;
+  unavailableReason?: string | null;
+  suggest?: AiEditSuggester;
+  onApply?: (clipId: string, properties: ClipPropertiesReq) => Promise<unknown>;
+  onUndo?: () => Promise<unknown>;
+}) {
+  const t = useT();
+  const [intent, setIntent] = useState(() => t("inspector.aiEdit.defaultIntent"));
+  const [status, setStatus] = useState<Status>("idle");
+  const [proposals, setProposals] = useState<AiEditProposal[]>([]);
+  const [selectedId, setSelectedId] = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const requestRef = useRef<AbortController | null>(null);
+  const mountedRef = useRef(true);
+
+  useEffect(() => {
+    mountedRef.current = true;
+    return () => {
+      mountedRef.current = false;
+      requestRef.current?.abort();
+    };
+  }, []);
+
+  useEffect(() => {
+    requestRef.current?.abort();
+    setStatus("idle");
+    setProposals([]);
+    setSelectedId(null);
+    setError(null);
+  }, [clip.id]);
+
+  const selected = useMemo(
+    () => proposals.find((proposal) => proposal.id === selectedId) ?? proposals[0] ?? null,
+    [proposals, selectedId],
+  );
+
+  async function generate() {
+    if (status === "generating" || status === "applying" || unavailableReason) return;
+    requestRef.current?.abort();
+    const controller = new AbortController();
+    requestRef.current = controller;
+    setStatus("generating");
+    setError(null);
+    setProposals([]);
+    setSelectedId(null);
+    try {
+      const next = await suggest(clip, intent.trim(), fps, controller.signal);
+      if (!mountedRef.current || controller.signal.aborted) return;
+      if (next.length === 0) throw new Error(t("inspector.aiEdit.noSuggestion"));
+      setProposals(next);
+      setSelectedId(next[0].id);
+      setStatus("review");
+    } catch (reason) {
+      if (!mountedRef.current || controller.signal.aborted) return;
+      setError(reason instanceof Error ? reason.message : String(reason));
+      setStatus("error");
+    } finally {
+      if (requestRef.current === controller) requestRef.current = null;
+    }
+  }
+
+  function cancel() {
+    requestRef.current?.abort();
+    requestRef.current = null;
+    setStatus("idle");
+    setError(null);
+  }
+
+  function reject() {
+    setProposals([]);
+    setSelectedId(null);
+    setError(null);
+    setStatus("idle");
+  }
+
+  async function apply() {
+    if (!selected || status !== "review") return;
+    setStatus("applying");
+    setError(null);
+    try {
+      await onApply(clip.id, selected.properties);
+      if (mountedRef.current) setStatus("applied");
+    } catch (reason) {
+      if (!mountedRef.current) return;
+      setError(reason instanceof Error ? reason.message : String(reason));
+      setStatus("error");
+    }
+  }
+
+  async function undo() {
+    if (status !== "applied") return;
+    setStatus("applying");
+    setError(null);
+    try {
+      await onUndo();
+      if (mountedRef.current) {
+        setProposals([]);
+        setSelectedId(null);
+        setStatus("idle");
+      }
+    } catch (reason) {
+      if (!mountedRef.current) return;
+      setError(reason instanceof Error ? reason.message : String(reason));
+      setStatus("error");
+    }
+  }
+
+  return (
+    <section
+      data-testid="ai-edit-tab"
+      aria-label={t("inspector.tab.aiEdit")}
+      style={{ display: "flex", flexDirection: "column", gap: "var(--space-md)" }}
+    >
+      <div
+        style={{
+          display: "flex",
+          alignItems: "center",
+          gap: "var(--space-xs)",
+          fontSize: "var(--fs-sm-md)",
+          fontWeight: "var(--fw-semibold)",
+          background: "var(--ai-gradient)",
+          WebkitBackgroundClip: "text",
+          color: "transparent",
+        }}
+      >
+        <Icon icon={Sparkles} size={13} />
+        {t("inspector.aiEdit.heading")}
+      </div>
+
+      {unavailableReason ? (
+        <div role="status" style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-sm)" }}>
+          {unavailableReason}
+        </div>
+      ) : (
+        <>
+          <label style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
+            <span style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+              {t("inspector.aiEdit.intent")}
+            </span>
+            <textarea
+              value={intent}
+              disabled={status === "generating" || status === "applying"}
+              onChange={(event) => setIntent(event.target.value)}
+              rows={3}
+              placeholder={t("inspector.aiEdit.placeholder")}
+              style={{
+                resize: "vertical",
+                minHeight: 58,
+                padding: "var(--space-sm)",
+                borderRadius: "var(--radius-sm)",
+                border: "var(--bw-thin) solid var(--border-primary)",
+                background: "var(--bg-raised)",
+                color: "var(--text-primary)",
+                font: "inherit",
+              }}
+            />
+          </label>
+          <div style={{ display: "flex", gap: "var(--space-xs)" }}>
+            <button
+              type="button"
+              data-action="generate"
+              disabled={!intent.trim() || status === "generating" || status === "applying"}
+              onClick={() => void generate()}
+              style={primaryButtonStyle}
+            >
+              <Icon icon={Sparkles} size={12} />
+              {status === "generating"
+                ? t("inspector.aiEdit.generating")
+                : t("inspector.aiEdit.generate")}
+            </button>
+            {status === "generating" && (
+              <button type="button" data-action="cancel" onClick={cancel} style={secondaryButtonStyle}>
+                <Icon icon={Square} size={11} />
+                {t("inspector.aiEdit.cancel")}
+              </button>
+            )}
+          </div>
+        </>
+      )}
+
+      {error && (
+        <div role="alert" style={{ color: "var(--status-error)", fontSize: "var(--fs-xs)" }}>
+          {error}
+        </div>
+      )}
+
+      {selected && (status === "review" || status === "applying" || status === "applied") && (
+        <div
+          style={{
+            display: "flex",
+            flexDirection: "column",
+            gap: "var(--space-sm)",
+            padding: "var(--space-sm-md)",
+            borderRadius: "var(--radius-md)",
+            border: "var(--bw-thin) solid var(--border-primary)",
+            background: "var(--bg-raised)",
+          }}
+        >
+          {proposals.map((proposal) => (
+            <button
+              key={proposal.id}
+              type="button"
+              role="radio"
+              aria-checked={selected.id === proposal.id}
+              disabled={status !== "review"}
+              onClick={() => setSelectedId(proposal.id)}
+              style={{
+                textAlign: "left",
+                padding: "var(--space-xs)",
+                borderRadius: "var(--radius-sm)",
+                border:
+                  selected.id === proposal.id
+                    ? "var(--bw-thin) solid var(--accent-primary)"
+                    : "var(--bw-thin) solid transparent",
+                color: "var(--text-primary)",
+              }}
+            >
+              <strong style={{ display: "block", fontSize: "var(--fs-sm)" }}>
+                {proposal.title}
+              </strong>
+              <span style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+                {proposal.explanation}
+              </span>
+            </button>
+          ))}
+          <div style={{ display: "flex", gap: "var(--space-xs)", flexWrap: "wrap" }}>
+            {status === "applied" ? (
+              <button type="button" data-action="undo" onClick={() => void undo()} style={secondaryButtonStyle}>
+                <Icon icon={RotateCcw} size={12} />
+                {t("inspector.aiEdit.undo")}
+              </button>
+            ) : (
+              <>
+                <button
+                  type="button"
+                  data-action="apply"
+                  disabled={status !== "review"}
+                  onClick={() => void apply()}
+                  style={primaryButtonStyle}
+                >
+                  <Icon icon={Sparkles} size={12} />
+                  {status === "applying"
+                    ? t("inspector.aiEdit.applying")
+                    : t("inspector.aiEdit.apply")}
+                </button>
+                <button
+                  type="button"
+                  data-action="reject"
+                  disabled={status !== "review"}
+                  onClick={reject}
+                  style={secondaryButtonStyle}
+                >
+                  <Icon icon={X} size={12} />
+                  {t("inspector.aiEdit.reject")}
+                </button>
+              </>
+            )}
+          </div>
+          {status === "applied" && (
+            <div role="status" style={{ color: "var(--status-success)", fontSize: "var(--fs-xs)" }}>
+              {t("inspector.aiEdit.applied")}
+            </div>
+          )}
+        </div>
+      )}
+    </section>
+  );
+}
+
+const primaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  gap: 4,
+  minHeight: 24,
+  padding: "2px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  background: "var(--ai-gradient)",
+  color: "#111",
+  fontSize: "var(--fs-xs)",
+  fontWeight: "var(--fw-semibold)",
+} as const;
+
+const secondaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  gap: 4,
+  minHeight: 24,
+  padding: "2px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  border: "var(--bw-thin) solid var(--border-primary)",
+  background: "var(--bg-prominent)",
+  color: "var(--text-primary)",
+  fontSize: "var(--fs-xs)",
+} as const;
diff --git a/web/src/components/inspector/ColorMatchSection.test.tsx b/web/src/components/inspector/ColorMatchSection.test.tsx
new file mode 100644
index 00000000..4671a579
--- /dev/null
+++ b/web/src/components/inspector/ColorMatchSection.test.tsx
@@ -0,0 +1,132 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { Clip, MatchColorResult, MediaItem } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { ColorMatchSection, type ColorMatchDependencies } from "./ColorMatchSection";
+
+function clip(overrides: Partial<Clip> = {}): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "target-1",
+    mediaType: "image",
+    sourceClipType: "image",
+    startFrame: 10,
+    durationFrames: 20,
+    trimStartFrame: 0,
+    trimEndFrame: 0,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: { centerX: 0.5, centerY: 0.5, width: 1, height: 1, rotation: 0, flipHorizontal: false, flipVertical: false },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    ...overrides,
+  };
+}
+
+function media(id: string, name: string, type: "image" | "video" = "image"): MediaItem {
+  return { id, name, type, duration: 1, hasAudio: false, favorite: false };
+}
+
+function result(applied: boolean): MatchColorResult {
+  return {
+    result: {
+      clipId: "clip-1",
+      referenceMediaRef: "reference-1",
+      referenceFrame: 0,
+      targetFrame: 12,
+      algorithm: "opentake-luma-preserving-mean-match",
+      algorithmVersion: 1,
+      grade: {
+        exposure: 0,
+        temperature: 0,
+        tint: 0,
+        liftGammaGain: {
+          lift: { r: 0, g: 0, b: 0 },
+          gamma: { r: 1, g: 1, b: 1 },
+          gain: { r: 0.8, g: 1.1, b: 1.4 },
+        },
+        contrast: 0,
+        saturation: 1,
+      },
+      targetMeanLinear: { r: 0.3, g: 0.2, b: 0.1 },
+      referenceMeanLinear: { r: 0.15, g: 0.25, b: 0.35 },
+      matchedMeanLinear: { r: 0.2, g: 0.22, b: 0.2 },
+      deltaEBefore: 22.5,
+      deltaEAfter: 0.2,
+      targetLumaBefore: 0.21,
+      targetLumaAfter: 0.211,
+      applied,
+    },
+    actionName: applied ? "Match Color" : null,
+  };
+}
+
+describe("ColorMatchSection", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    useEditorUiStore.setState({ activeFrame: 12 });
+    useMediaStore.setState({ items: [media("target-1", "Target"), media("reference-1", "Reference")] });
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("previews_measured_improvement_then_applies_and_undoes", async () => {
+    const generate = vi.fn().mockResolvedValueOnce(result(false)).mockResolvedValueOnce(result(true));
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const dependencies: ColorMatchDependencies = { generate, cancel: vi.fn(), undo };
+    await act(async () => root.render(<ColorMatchSection clip={clip()} dependencies={dependencies} />));
+    const button = (text: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(text))!;
+
+    await act(async () => button("Analyze match").click());
+    expect(generate).toHaveBeenNthCalledWith(1, "clip-1", "reference-1", 0, 12, false);
+    expect(container.textContent).toContain("22.50 → 0.20");
+    expect(button("Apply editable grade").disabled).toBe(false);
+
+    await act(async () => button("Apply editable grade").click());
+    expect(generate).toHaveBeenNthCalledWith(2, "clip-1", "reference-1", 0, 12, true);
+    expect(container.textContent).toContain("saved in the project");
+    await act(async () => button("Undo color match").click());
+    expect(undo).toHaveBeenCalledOnce();
+  });
+
+  it("cancels_a_pending_analysis_and_ignores_its_stale_result", async () => {
+    let resolve: ((value: MatchColorResult) => void) | undefined;
+    const generate = vi.fn(() => new Promise<MatchColorResult>((done) => { resolve = done; }));
+    const cancel = vi.fn().mockResolvedValue(true);
+    const dependencies: ColorMatchDependencies = { generate, cancel, undo: vi.fn() };
+    await act(async () => root.render(<ColorMatchSection clip={clip()} dependencies={dependencies} />));
+    const button = (text: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(text))!;
+    await act(async () => button("Analyze match").click());
+    await act(async () => button("Cancel").click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => resolve?.(result(false)));
+    expect(container.textContent).not.toContain("22.50 → 0.20");
+  });
+
+  it("requires_a_reference_and_refuses_reversed_clips", async () => {
+    const dependencies: ColorMatchDependencies = { generate: vi.fn(), cancel: vi.fn(), undo: vi.fn() };
+    useMediaStore.setState({ items: [media("target-1", "Target")] });
+    await act(async () => root.render(<ColorMatchSection clip={clip()} dependencies={dependencies} />));
+    expect(container.textContent).toContain("No other image or video");
+    await act(async () => root.render(<ColorMatchSection clip={clip({ reversed: true })} dependencies={dependencies} />));
+    expect(container.textContent).toContain("ordinary forward 1x image or video clips");
+  });
+});
diff --git a/web/src/components/inspector/ColorMatchSection.tsx b/web/src/components/inspector/ColorMatchSection.tsx
new file mode 100644
index 00000000..7d6ec7c6
--- /dev/null
+++ b/web/src/components/inspector/ColorMatchSection.tsx
@@ -0,0 +1,196 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { Palette, RotateCcw, Square } from "lucide-react";
+import { useT } from "../../i18n";
+import * as api from "../../lib/api";
+import type { Clip, MatchColorResult, Rgb } from "../../lib/types";
+import * as edit from "../../store/editActions";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { Icon } from "../ui/Icon";
+
+type Phase = "idle" | "previewing" | "review" | "applying" | "applied";
+
+export interface ColorMatchDependencies {
+  generate: (
+    clipId: string,
+    referenceMediaRef: string,
+    referenceFrame: number,
+    targetFrame: number,
+    apply: boolean,
+  ) => Promise<MatchColorResult>;
+  cancel: () => Promise<boolean>;
+  undo: () => Promise<unknown>;
+}
+
+const defaultDependencies: ColorMatchDependencies = {
+  generate: api.matchColor,
+  cancel: api.cancelAdvancedWorkflow,
+  undo: edit.undo,
+};
+
+export function ColorMatchSection({ clip, dependencies = defaultDependencies }: {
+  clip: Clip;
+  dependencies?: ColorMatchDependencies;
+}) {
+  const t = useT();
+  const activeFrame = useEditorUiStore((state) => state.activeFrame);
+  const items = useMediaStore((state) => state.items);
+  const references = useMemo(
+    () => items.filter((item) => item.id !== clip.mediaRef && (item.type === "image" || item.type === "video")),
+    [items, clip.mediaRef],
+  );
+  const [referenceId, setReferenceId] = useState("");
+  const [referenceFrame, setReferenceFrame] = useState(0);
+  const [targetFrame, setTargetFrame] = useState(
+    activeFrame >= clip.startFrame && activeFrame < clip.startFrame + clip.durationFrames
+      ? activeFrame
+      : clip.startFrame,
+  );
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [preview, setPreview] = useState<MatchColorResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const operationRef = useRef(0);
+  const previousColorMatchInputRef = useRef(clip.colorMatchInput);
+  const compatible =
+    (clip.mediaType === "image" || clip.mediaType === "video") &&
+    !clip.nestedSequenceId &&
+    !clip.reversed &&
+    Math.abs(clip.speed - 1) <= Number.EPSILON;
+
+  useEffect(() => {
+    if (!references.some((item) => item.id === referenceId)) {
+      setReferenceId(references[0]?.id ?? "");
+    }
+  }, [references, referenceId]);
+
+  useEffect(() => {
+    operationRef.current += 1;
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+  }, [clip.id, referenceId, referenceFrame, targetFrame]);
+
+  useEffect(() => {
+    const previous = previousColorMatchInputRef.current;
+    previousColorMatchInputRef.current = clip.colorMatchInput;
+    if (phase === "applied" && previous && !clip.colorMatchInput) {
+      setPreview(null);
+      setPhase("idle");
+    }
+    // Only a persisted-provenance transition invalidates the applied state;
+    // phase itself must not make injected/test completions look stale.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [clip.colorMatchInput]);
+
+  async function run(apply: boolean) {
+    if (!compatible || !referenceId) return;
+    const operation = operationRef.current + 1;
+    operationRef.current = operation;
+    setPhase(apply ? "applying" : "previewing");
+    setError(null);
+    try {
+      const result = await dependencies.generate(
+        clip.id,
+        referenceId,
+        referenceFrame,
+        targetFrame,
+        apply,
+      );
+      if (operationRef.current !== operation) return;
+      setPreview(result);
+      setPhase(apply ? "applied" : "review");
+    } catch (reason) {
+      if (operationRef.current !== operation) return;
+      setError(message(reason));
+      setPhase(preview ? "review" : "idle");
+    }
+  }
+
+  async function cancel() {
+    operationRef.current += 1;
+    await dependencies.cancel();
+    setPhase(preview ? "review" : "idle");
+  }
+
+  async function undo() {
+    setPhase("applying");
+    try {
+      await dependencies.undo();
+      setPhase("review");
+    } catch (reason) {
+      setError(message(reason));
+      setPhase("applied");
+    }
+  }
+
+  const busy = phase === "previewing" || phase === "applying";
+  const selectedReference = references.find((item) => item.id === referenceId);
+  return (
+    <section data-testid="color-match-section" style={{ display: "flex", flexDirection: "column", gap: "var(--space-sm)" }}>
+      <div style={headingStyle}><Icon icon={Palette} size={11} />{t("inspector.colorMatch.heading")}</div>
+      {!compatible && <div role="status" style={hintStyle}>{t("inspector.colorMatch.compatibility")}</div>}
+      {compatible && references.length === 0 && <div role="status" style={hintStyle}>{t("inspector.colorMatch.noReference")}</div>}
+      {compatible && references.length > 0 && (
+        <>
+          <label style={fieldLabelStyle}>
+            {t("inspector.colorMatch.reference")}
+            <select value={referenceId} disabled={busy || phase === "applied"} onChange={(event) => setReferenceId(event.currentTarget.value)} style={inputStyle}>
+              {references.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+            </select>
+          </label>
+          {phase !== "applied" && (
+            <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: "var(--space-xs)" }}>
+              <NumberField label={t("inspector.colorMatch.referenceFrame")} value={referenceFrame} min={0} max={selectedReference?.type === "image" ? 0 : Number.MAX_SAFE_INTEGER} disabled={busy} onChange={setReferenceFrame} />
+              <NumberField label={t("inspector.colorMatch.targetFrame")} value={targetFrame} min={clip.startFrame} max={clip.startFrame + clip.durationFrames - 1} disabled={busy} onChange={setTargetFrame} />
+            </div>
+          )}
+          <div style={{ display: "flex", flexWrap: "wrap", gap: "var(--space-xs)" }}>
+            {phase === "applied" ? (
+              <button type="button" onClick={() => void undo()} style={secondaryButtonStyle}><Icon icon={RotateCcw} size={12} />{t("inspector.colorMatch.undo")}</button>
+            ) : (
+              <>
+                <button type="button" disabled={busy} onClick={() => void run(false)} style={secondaryButtonStyle}><Icon icon={Palette} size={12} />{phase === "previewing" ? t("inspector.colorMatch.processing") : error ? t("inspector.colorMatch.retry") : t("inspector.colorMatch.preview")}</button>
+                <button type="button" disabled={!preview || busy} onClick={() => void run(true)} style={primaryButtonStyle}><Icon icon={Palette} size={12} />{phase === "applying" ? t("inspector.colorMatch.applying") : t("inspector.colorMatch.apply")}</button>
+              </>
+            )}
+            {busy && <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}><Icon icon={Square} size={11} />{t("inspector.colorMatch.cancel")}</button>}
+          </div>
+        </>
+      )}
+      {preview && (
+        <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
+          <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: "var(--space-xs)" }}>
+            <Swatch label={t("inspector.colorMatch.targetSample")} color={preview.result.targetMeanLinear} />
+            <Swatch label={t("inspector.colorMatch.referenceSample")} color={preview.result.matchedMeanLinear} />
+          </div>
+          <div style={hintStyle}>{t("inspector.colorMatch.delta", { before: preview.result.deltaEBefore.toFixed(2), after: preview.result.deltaEAfter.toFixed(2) })}</div>
+          <div style={hintStyle}>{t("inspector.colorMatch.luma", { before: preview.result.targetLumaBefore.toFixed(3), after: preview.result.targetLumaAfter.toFixed(3) })}</div>
+        </div>
+      )}
+      {phase === "applied" && <div role="status" style={{ ...hintStyle, color: "var(--status-success)" }}>{t("inspector.colorMatch.applied")}</div>}
+      {error && <div role="alert" style={{ ...hintStyle, color: "var(--status-error)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function NumberField({ label, value, min, max, disabled, onChange }: { label: string; value: number; min: number; max: number; disabled: boolean; onChange: (value: number) => void }) {
+  return <label style={fieldLabelStyle}>{label}<input type="number" value={value} min={min} max={max} disabled={disabled} onChange={(event) => onChange(Number(event.currentTarget.value))} style={inputStyle} /></label>;
+}
+
+function Swatch({ label, color }: { label: string; color: Rgb }) {
+  return <div style={{ ...fieldLabelStyle, padding: "var(--space-xs)", borderRadius: "var(--radius-sm)", background: linearRgbCss(color), minHeight: 42, justifyContent: "flex-end", color: "white", textShadow: "0 1px 2px black" }}>{label}</div>;
+}
+
+function linearRgbCss(color: Rgb): string {
+  const encode = (value: number) => Math.round(255 * (value < 0.018 ? 4.5 * value : 1.099 * value ** 0.45 - 0.099));
+  return `rgb(${encode(color.r)} ${encode(color.g)} ${encode(color.b)})`;
+}
+
+function message(reason: unknown): string { return reason instanceof Error ? reason.message : String(reason); }
+
+const headingStyle = { display: "flex", alignItems: "center", gap: "var(--space-xs)", fontSize: "var(--fs-xxs)", fontWeight: "var(--fw-semibold)", color: "var(--text-muted)", textTransform: "uppercase", letterSpacing: "var(--tracking-wide)" } as const;
+const hintStyle = { color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const fieldLabelStyle = { display: "flex", flexDirection: "column", gap: 2, color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const inputStyle = { minWidth: 0, padding: "3px var(--space-xs)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-primary)", fontSize: "var(--fs-xs)" } as const;
+const primaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", background: "var(--ai-gradient)", color: "#111", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" } as const;
+const secondaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
diff --git a/web/src/components/inspector/Inspector.test.tsx b/web/src/components/inspector/Inspector.test.tsx
new file mode 100644
index 00000000..449f579f
--- /dev/null
+++ b/web/src/components/inspector/Inspector.test.tsx
@@ -0,0 +1,617 @@
+// @vitest-environment happy-dom
+
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { Clip, Timeline } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { useProjectStore } from "../../store/projectStore";
+import * as edit from "../../store/editActions";
+import * as api from "../../lib/api";
+import { Inspector } from "./Inspector";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+function visualClip(overrides: Partial<Clip> = {}): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "media-1",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 0,
+    durationFrames: 90,
+    trimStartFrame: 0,
+    trimEndFrame: 90,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    ...overrides,
+  };
+}
+
+function timelineWith(clip: Clip): Timeline {
+  return {
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    settingsConfigured: true,
+    tracks: [
+      {
+        id: "video-1",
+        name: "Video 1",
+        type: "video",
+        muted: false,
+        hidden: false,
+        syncLocked: false,
+        clips: [clip],
+      },
+    ],
+  };
+}
+
+afterEach(() => {
+  document.body.replaceChildren();
+  useEditorUiStore.setState({
+    selectedClipIds: new Set(),
+    inspectorTab: "video",
+    keyframesPanelVisible: false,
+  });
+  useMediaStore.setState({ items: [], folders: [], importing: false, error: null });
+  useProjectStore.getState().clearProjectSnapshot();
+});
+
+describe("Inspector completion surface", () => {
+  it("renders a generated media source without entering a selector update loop", async () => {
+    useProjectStore.setState({
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: false,
+        tracks: [],
+      },
+      projectPath: "/tmp/demo.opentake",
+    });
+    useMediaStore.setState({
+      items: [
+        {
+          id: "stem-vocals",
+          name: "Mix Vocals",
+          type: "audio",
+          duration: 5,
+          hasAudio: true,
+          generationInput: {
+            prompt: "stem:vocals",
+            model: "opentake-center-v1",
+            duration: 5,
+            aspectRatio: "audio",
+            provider: "local",
+            status: "ready",
+            progress: 1,
+          },
+        },
+      ],
+      folders: [],
+      importing: false,
+      error: null,
+    });
+    useEditorUiStore.setState({
+      selectedClipIds: new Set(),
+      previewMediaId: "stem-vocals",
+    });
+
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    expect(container.textContent).toContain("Mix Vocals");
+    expect(container.textContent).toContain("opentake-center-v1");
+    await act(async () => root.unmount());
+  });
+
+  it("four_states_tabs_fields_and_lanes", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "video" });
+
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const tabs = [...container.querySelectorAll<HTMLElement>('[role="tab"]')];
+    expect(tabs.map((tab) => tab.textContent)).toEqual(["视频", "AI 编辑"]);
+    expect(tabs[0]?.getAttribute("aria-selected")).toBe("true");
+
+    await act(async () => tabs[1]?.dispatchEvent(new MouseEvent("click", { bubbles: true })));
+    expect(container.querySelector('[data-testid="ai-edit-tab"]')).not.toBeNull();
+
+    await act(async () => root.unmount());
+  });
+
+  it("opens_video_and_ai_tabs_for_one_linked_av_selection", async () => {
+    const video = visualClip({ id: "video", linkGroupId: "linked" });
+    const audio = visualClip({
+      id: "audio",
+      mediaRef: "media-1",
+      mediaType: "audio",
+      linkGroupId: "linked",
+    });
+    const linkedTimeline = timelineWith(video);
+    linkedTimeline.tracks.push({
+      id: "audio-1",
+      type: "audio",
+      muted: false,
+      hidden: false,
+      syncLocked: true,
+      clips: [audio],
+    });
+    useProjectStore.setState({ timeline: linkedTimeline });
+    useEditorUiStore.setState({
+      selectedClipIds: new Set([video.id, audio.id]),
+      inspectorTab: "video",
+    });
+
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    expect(container.textContent).not.toContain("已选择 2 项");
+    expect(
+      [...container.querySelectorAll<HTMLElement>('[role="tab"]')].map((tab) => tab.textContent),
+    ).toEqual(["视频", "AI 编辑"]);
+    await act(async () => root.unmount());
+  });
+
+  it("creates edits and deletes a polygon mask through the undoable command route", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "video" });
+    const setMasks = vi.spyOn(edit, "setMasks").mockResolvedValue();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const maskSection = [...container.querySelectorAll("section")].find((section) =>
+      section.textContent?.includes("蒙版"),
+    );
+    expect(maskSection).not.toBeUndefined();
+    const enabled = maskSection?.querySelector<HTMLInputElement>('input[type="checkbox"]');
+    await act(async () => enabled?.click());
+    expect(setMasks).toHaveBeenLastCalledWith(
+      [clip.id],
+      [expect.objectContaining({ shape: expect.objectContaining({ kind: "circle" }) })],
+    );
+
+    const select = maskSection?.querySelector<HTMLSelectElement>("select");
+    if (select) select.value = "poly";
+    await act(async () => select?.dispatchEvent(new Event("change", { bubbles: true })));
+    expect(setMasks).toHaveBeenLastCalledWith(
+      [clip.id],
+      [expect.objectContaining({ shape: expect.objectContaining({ kind: "poly" }) })],
+    );
+    expect(maskSection?.textContent).toContain("添加点");
+
+    const deleteButton = [...(maskSection?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "删除蒙版",
+    );
+    await act(async () => deleteButton?.dispatchEvent(new MouseEvent("click", { bubbles: true })));
+    expect(setMasks).toHaveBeenLastCalledWith([clip.id], []);
+
+    setMasks.mockRestore();
+    await act(async () => root.unmount());
+  });
+
+  it("analyzes, displays, and resets stabilization through production actions", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "video" });
+    const solution = {
+      model: "opentake.motion-smoothing",
+      modelVersion: 1,
+      sourceIdentity: clip.mediaRef,
+      strength: 1,
+      cropMargin: 0,
+      keyframes: [
+        { frame: 0, translationX: 0, translationY: 0, rotationDegrees: 0 },
+        { frame: 89, translationX: 0.02, translationY: -0.01, rotationDegrees: 0 },
+      ],
+    };
+    const analyze = vi
+      .spyOn(edit, "analyzeAndApplyStabilization")
+      .mockResolvedValue(solution);
+    const cancel = vi.spyOn(edit, "cancelStabilizationAnalysis").mockResolvedValue(true);
+    const reset = vi.spyOn(edit, "resetStabilization").mockResolvedValue();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const analyzeButton = container.querySelector<HTMLButtonElement>(
+      '[data-testid="stabilization-section"] button',
+    );
+    expect(analyzeButton).not.toBeNull();
+    await act(async () => {
+      analyzeButton?.click();
+      await Promise.resolve();
+    });
+    expect(analyze).toHaveBeenCalledWith(clip.id);
+
+    await act(async () => {
+      useProjectStore.setState({
+        timeline: timelineWith(visualClip({ stabilization: solution })),
+      });
+    });
+    const stabilization = container.querySelector('[data-testid="stabilization-section"]');
+    expect(stabilization?.textContent).toContain("opentake.motion-smoothing v1");
+    expect(stabilization?.textContent).toContain("100%");
+    let failReanalysis!: (reason: Error) => void;
+    analyze.mockImplementationOnce(
+      () =>
+        new Promise((_resolve, reject) => {
+          failReanalysis = reject;
+        }),
+    );
+    const reanalyzeButton = [...(stabilization?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "重新分析",
+    );
+    await act(async () => {
+      reanalyzeButton?.click();
+      await Promise.resolve();
+    });
+    expect(reanalyzeButton?.disabled).toBe(true);
+    const cancelButton = [...(stabilization?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "取消分析",
+    );
+    expect(cancelButton).not.toBeNull();
+    await act(async () => cancelButton?.click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => failReanalysis(new Error("cancelled")));
+    expect(stabilization?.querySelector('[role="alert"]')).toBeNull();
+    const resetButton = [...(stabilization?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "重置防抖",
+    );
+    await act(async () => resetButton?.click());
+    expect(reset).toHaveBeenCalledWith(clip.id);
+
+    analyze.mockRestore();
+    cancel.mockRestore();
+    reset.mockRestore();
+    await act(async () => root.unmount());
+  });
+
+  it("analyzes, reports progress, displays, and resets loudness normalization", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useMediaStore.setState({
+      items: [{ id: clip.mediaRef, name: "speech.wav", type: "video", duration: 3, hasAudio: true }],
+      folders: [],
+      importing: false,
+      error: null,
+    });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "audio", activeFrame: 42 });
+    const normalization = {
+      targetLufs: -16,
+      truePeakCeilingDbtp: -1,
+      inputIntegratedLufs: -23,
+      inputTruePeakDbtp: -8,
+      gainDb: 7,
+      outputIntegratedLufs: -16,
+      outputTruePeakDbtp: -1,
+    };
+    const listen = vi.spyOn(api, "onLoudnessProgress").mockImplementation(async (_id, handler) => {
+      handler({ clipId: clip.id, done: 40, total: 100 });
+      return () => {};
+    });
+    const analyze = vi.spyOn(edit, "analyzeAndApplyLoudness").mockResolvedValue(normalization);
+    const reset = vi.spyOn(edit, "setLoudnessNormalization").mockResolvedValue();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const section = container.querySelector('[data-testid="loudness-section"]');
+    const analyzeButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "分析并应用",
+    );
+    await act(async () => {
+      analyzeButton?.click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(listen).toHaveBeenCalledWith(clip.id, expect.any(Function));
+    expect(analyze).toHaveBeenCalledWith(clip.id, -16, -1);
+
+    await act(async () => {
+      useProjectStore.setState({
+        timeline: timelineWith(visualClip({ loudnessNormalization: normalization })),
+      });
+    });
+    const result = container.querySelector('[data-testid="loudness-result"]');
+    expect(result?.textContent).toContain("-23.0 → -16.0 LUFS");
+    expect(result?.textContent).toContain("+7.0 dB");
+    const resetButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "重置响度",
+    );
+    await act(async () => resetButton?.click());
+    expect(reset).toHaveBeenCalledWith(clip.id, null);
+
+    listen.mockRestore();
+    analyze.mockRestore();
+    reset.mockRestore();
+    await act(async () => root.unmount());
+  });
+
+  it("prepares, previews, cancels, displays, and resets audio denoise", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useMediaStore.setState({
+      items: [{ id: clip.mediaRef, name: "speech-noise.wav", type: "video", duration: 5, hasAudio: true }],
+      folders: [],
+      importing: false,
+      error: null,
+    });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "audio" });
+    const denoise = { mode: "voice" as const, strength: 0.85, previewEnabled: true };
+    const unlisten = vi.fn();
+    const listen = vi.spyOn(api, "onDenoiseProgress").mockImplementation(async (_id, handler) => {
+      handler({ clipId: clip.id, done: 60, total: 100 });
+      return unlisten;
+    });
+    const prepare = vi
+      .spyOn(edit, "prepareAndApplyAudioDenoise")
+      .mockResolvedValue(denoise);
+    const setDenoise = vi.spyOn(edit, "setAudioDenoise").mockResolvedValue();
+    const cancel = vi.spyOn(edit, "cancelDenoiseAnalysis").mockResolvedValue(true);
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const section = container.querySelector('[data-testid="denoise-section"]');
+    const mode = section?.querySelector<HTMLSelectElement>('select[aria-label="模式"]');
+    const strength = section?.querySelector<HTMLInputElement>('input[aria-label="强度"]');
+    await act(async () => {
+      if (mode) mode.value = "voice";
+      mode?.dispatchEvent(new Event("change", { bubbles: true }));
+      if (strength) {
+        Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set?.call(
+          strength,
+          "0.85",
+        );
+      }
+      strength?.dispatchEvent(new InputEvent("input", { bubbles: true }));
+    });
+    const applyButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "应用降噪",
+    );
+    await act(async () => {
+      applyButton?.click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(listen).toHaveBeenCalledWith(clip.id, expect.any(Function));
+    expect(prepare).toHaveBeenCalledWith(clip.id, "voice", 0.85, true);
+    expect(unlisten).toHaveBeenCalledOnce();
+
+    await act(async () => {
+      useProjectStore.setState({ timeline: timelineWith(visualClip({ audioDenoise: denoise })) });
+    });
+    expect(container.querySelector('[data-testid="denoise-result"]')?.textContent).toContain(
+      "人声 · 85% · 预览开启",
+    );
+    const preview = section?.querySelector<HTMLInputElement>('input[aria-label="预览降噪"]');
+    await act(async () => preview?.click());
+    expect(setDenoise).toHaveBeenCalledWith(clip.id, { ...denoise, previewEnabled: false });
+
+    let rejectReapply!: (reason: Error) => void;
+    prepare.mockImplementationOnce(
+      () =>
+        new Promise((_resolve, reject) => {
+          rejectReapply = reject;
+        }),
+    );
+    const reapplyButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "重新应用",
+    );
+    await act(async () => {
+      reapplyButton?.click();
+      await Promise.resolve();
+    });
+    const cancelButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "取消处理",
+    );
+    await act(async () => cancelButton?.click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => rejectReapply(new Error("denoise_cancelled")));
+    expect(section?.querySelector('[role="alert"]')).toBeNull();
+
+    const resetButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "重置降噪",
+    );
+    await act(async () => resetButton?.click());
+    expect(setDenoise).toHaveBeenLastCalledWith(clip.id, null);
+
+    listen.mockRestore();
+    prepare.mockRestore();
+    setDenoise.mockRestore();
+    cancel.mockRestore();
+    await act(async () => root.unmount());
+  });
+
+  it("separates stems locally with privacy copy, progress, cancellation, and success", async () => {
+    const clip = visualClip();
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useMediaStore.setState({
+      items: [{ id: clip.mediaRef, name: "mix.wav", type: "video", duration: 5, hasAudio: true }],
+      folders: [],
+      importing: false,
+      error: null,
+    });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "audio" });
+    const unlisten = vi.fn();
+    const listen = vi.spyOn(api, "onStemSeparationProgress").mockImplementation(async (_id, handler) => {
+      handler({ sourceAssetId: clip.mediaRef, done: 700, total: 1000 });
+      return unlisten;
+    });
+    const separate = vi.spyOn(api, "separateAudioStems").mockResolvedValue({
+      vocalsAssetId: "vocals",
+      accompanimentAssetId: "music",
+      sourceSha256: "a".repeat(64),
+      execution: "local:opentake-center-v1",
+      modelSha256: "b".repeat(64),
+      vocalSdrImprovementDb: 60,
+    });
+    const cancel = vi.spyOn(api, "cancelStemSeparation").mockResolvedValue(true);
+    const importTracks = vi.spyOn(api, "importStemsToTracks").mockResolvedValue({
+      clipIds: ["vocal-clip", "music-clip"],
+      actionName: "Import Stems To Tracks",
+    });
+    const undo = vi.spyOn(edit, "undo").mockResolvedValue({} as never);
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const section = container.querySelector('[data-testid="stem-separation-section"]');
+    expect(section?.textContent).toContain("音频不会上传");
+    const button = [...(section?.querySelectorAll("button") ?? [])].find(
+      (candidate) => candidate.textContent === "分离人声与伴奏",
+    );
+    await act(async () => {
+      button?.click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(listen).toHaveBeenCalledWith(clip.mediaRef, expect.any(Function));
+    expect(separate).toHaveBeenCalledWith(clip.mediaRef, "local", null, null, false);
+    expect(unlisten).toHaveBeenCalledOnce();
+    expect(container.querySelector('[data-testid="stem-separation-result"]')?.textContent).toContain(
+      "已将人声和伴奏添加到素材库",
+    );
+    await act(async () => useMediaStore.setState((state) => ({
+      items: [
+        ...state.items,
+        { id: "vocals", name: "Vocals", type: "audio", duration: 5, hasAudio: true, path: "/tmp/vocals.wav" },
+        { id: "music", name: "Music", type: "audio", duration: 5, hasAudio: true, path: "/tmp/music.wav" },
+      ],
+    })));
+    expect(section?.querySelectorAll("audio")).toHaveLength(2);
+    const importButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (candidate) => candidate.textContent === "导入为两条对齐音轨",
+    );
+    await act(async () => importButton?.click());
+    expect(importTracks).toHaveBeenCalledWith("vocals", "music", 42);
+    const undoButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (candidate) => candidate.textContent === "撤销音轨导入",
+    );
+    await act(async () => undoButton?.click());
+    expect(undo).toHaveBeenCalledOnce();
+
+    let rejectSeparation!: (reason: Error) => void;
+    separate.mockImplementationOnce(
+      () =>
+        new Promise((_resolve, reject) => {
+          rejectSeparation = reject;
+        }),
+    );
+    await act(async () => {
+      button?.click();
+      await Promise.resolve();
+    });
+    const cancelButton = [...(section?.querySelectorAll("button") ?? [])].find(
+      (candidate) => candidate.textContent === "取消分离",
+    );
+    await act(async () => cancelButton?.click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => rejectSeparation(new Error("stem_separation_cancelled")));
+    expect(section?.querySelector('[role="alert"]')).toBeNull();
+
+    listen.mockRestore();
+    separate.mockRestore();
+    cancel.mockRestore();
+    importTracks.mockRestore();
+    undo.mockRestore();
+    await act(async () => root.unmount());
+  });
+
+  it("adds reorders adjusts toggles and removes generic effects through undoable commands", async () => {
+    const clip = visualClip({
+      effects: [
+        { name: "grayscale", params: {}, enabled: true },
+        { name: "invert", params: { amount: 0.5 }, enabled: true },
+      ],
+    });
+    useProjectStore.setState({ timeline: timelineWith(clip), projectPath: "/tmp/demo.opentake" });
+    useEditorUiStore.setState({ selectedClipIds: new Set([clip.id]), inspectorTab: "video" });
+    const setEffects = vi.spyOn(edit, "setEffects").mockResolvedValue();
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<Inspector />));
+
+    const section = container.querySelector('[data-testid="generic-effects-section"]');
+    expect(section).not.toBeNull();
+    const add = [...(section?.querySelectorAll("button") ?? [])].find(
+      (button) => button.textContent === "添加效果",
+    );
+    await act(async () => add?.click());
+    expect(setEffects).toHaveBeenLastCalledWith(
+      [clip.id],
+      expect.arrayContaining([expect.objectContaining({ name: "grayscale" })]),
+    );
+
+    let items = [...(section?.querySelectorAll<HTMLElement>('[data-testid="generic-effect-item"]') ?? [])];
+    const moveUp = items[2]?.querySelector<HTMLButtonElement>('button[aria-label="上移效果"]');
+    await act(async () => moveUp?.click());
+    expect(setEffects.mock.calls.at(-1)?.[1].map((effect) => effect.name)).toEqual([
+      "grayscale",
+      "grayscale",
+      "invert",
+    ]);
+
+    items = [...(section?.querySelectorAll<HTMLElement>('[data-testid="generic-effect-item"]') ?? [])];
+    const amount = items[0]?.querySelector<HTMLInputElement>('input[type="range"]');
+    await act(async () => {
+      if (amount) {
+        Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set?.call(
+          amount,
+          "0.35",
+        );
+      }
+      amount?.dispatchEvent(new InputEvent("input", { bubbles: true }));
+    });
+    expect(setEffects.mock.calls.at(-1)?.[1][0]?.params.amount).toBe(0.35);
+
+    const enabled = items[0]?.querySelector<HTMLInputElement>('input[type="checkbox"]');
+    await act(async () => enabled?.click());
+    expect(setEffects.mock.calls.at(-1)?.[1][0]?.enabled).toBe(false);
+
+    const remove = items[0]?.querySelector<HTMLButtonElement>('button[aria-label="删除效果"]');
+    await act(async () => remove?.click());
+    expect(setEffects.mock.calls.at(-1)?.[1]).toHaveLength(2);
+
+    setEffects.mockRestore();
+    await act(async () => root.unmount());
+  });
+});
diff --git a/web/src/components/inspector/Inspector.tsx b/web/src/components/inspector/Inspector.tsx
index 3fbfe5f0..c23e2fa2 100644
--- a/web/src/components/inspector/Inspector.tsx
+++ b/web/src/components/inspector/Inspector.tsx
@@ -1,14 +1,14 @@
 /**
  * Inspector (SPEC §6). Title bar + one of four content states: marquee summary,
- * clip inspector (with Video/Audio tabs), media-asset source, or project
+ * clip inspector (with Text/Video/Audio/AI Edit tabs), media-asset source, or project
  * metadata. Editable fields commit via SetClipProperties; a field whose
  * property already has an active keyframe track stays editable but commits
  * via UpsertKeyframe at the playhead instead (see `../../lib/keyframeValue`).
- * The keyframe lane and Text/AI-Edit tabs are scaffolded (TODO: full parity
- * in a later pass).
+ * AI Edit proposals are reviewed here and accepted through the same undoable
+ * command layer as direct Inspector edits.
  */
 
-import { useEffect, useState } from "react";
+import { useEffect, useState, type Dispatch, type SetStateAction } from "react";
 import {
   ChevronLeft,
   ChevronRight,
@@ -27,16 +27,25 @@ import { Icon } from "../ui/Icon";
 import { HoverButton } from "../ui/HoverButton";
 import { ScrubbableNumberField } from "./ScrubbableNumberField";
 import { TextTab } from "./TextTab";
+import { AiEditTab } from "./AiEditTab";
+import { MattingSection } from "./MattingSection";
+import { ObjectRemovalSection } from "./ObjectRemovalSection";
+import { ColorMatchSection } from "./ColorMatchSection";
+import { MotionTrackingSection } from "./MotionTrackingSection";
 import { KeyframesPanel } from "./KeyframesPanel";
 import { SwapMediaSection } from "./SwapMediaSection";
 import { useProjectStore } from "../../store/projectStore";
 import { useEditorUiStore } from "../../store/uiStore";
 import { useMediaStore } from "../../store/mediaStore";
 import * as edit from "../../store/editActions";
+import * as api from "../../lib/api";
+import { openDialog } from "../../lib/dialog";
 import { formatTimecode } from "../../lib/geometry";
+import { assetUrl } from "../../lib/asset";
 import {
   cropAt,
   liveVolumeKfLinearAt,
+  findLogicalSingleClip,
   mediaCanvasAspect,
   rawOpacityAt,
   resizeTransformKeepingSourceAspect,
@@ -63,11 +72,13 @@ import { CROP_ASPECT_LOCKS, cropForPreset, type CropAspectLock } from "../../lib
 import { FS, RADIUS, SPACE } from "../../lib/theme";
 import { useT, type TFunction } from "../../i18n";
 import type {
+  AudioDenoise,
   ChromaKey,
   Clip,
   ClipType,
   ColorGrade,
   Crop,
+  DenoiseMode,
   GenerationInput,
   Interpolation,
   KeyframeProperty,
@@ -75,9 +86,17 @@ import type {
   MaskShape,
   MediaItem,
   Rgb,
+  HslSecondary,
   Timeline,
+  Effect,
 } from "../../lib/types";
 import { formatFileSize, formatMediaDuration } from "../../lib/mediaFormat";
+import {
+  EFFECT_REGISTRY,
+  isAdvertisedEffectName,
+  newAdvertisedEffect,
+  type AdvertisedEffectName,
+} from "../../lib/effects";
 
 function gcd(a: number, b: number): number {
   return b === 0 ? a : gcd(b, a % b);
@@ -85,7 +104,12 @@ function gcd(a: number, b: number): number {
 
 export function Inspector() {
   const t = useT();
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
   const selectedClipIds = useEditorUiStore((s) => s.selectedClipIds);
   const inspectorTab = useEditorUiStore((s) => s.inspectorTab);
   const setInspectorTab = useEditorUiStore((s) => s.setInspectorTab);
@@ -101,8 +125,8 @@ export function Inspector() {
   );
 
   const selectedClips = collectSelected(timeline, selectedClipIds);
-  const isMarquee = selectedClips.length > 1;
-  const single = selectedClips.length === 1 ? selectedClips[0] : null;
+  const single = findLogicalSingleClip(timeline, selectedClipIds);
+  const isMarquee = selectedClips.length > 0 && single === null;
   // State priority mirrors upstream `InspectorView.body` (:49-56):
   // marquee > clip(visual/audio) > mediaAsset > projectMetadata. Clip selection
   // is checked before the media asset, so a selected clip always wins.
@@ -135,7 +159,6 @@ export function Inspector() {
             clip={single}
             tab={inspectorTab}
             setTab={setInspectorTab}
-            hasAudio={single.mediaType === "audio"}
             keyframesOpen={keyframesPanelVisible}
             onToggleKeyframes={toggleKeyframesPanel}
             t={t}
@@ -376,7 +399,6 @@ function ClipInspector({
   clip,
   tab,
   setTab,
-  hasAudio,
   keyframesOpen,
   onToggleKeyframes,
   t,
@@ -384,24 +406,34 @@ function ClipInspector({
   clip: Clip;
   tab: string;
   setTab: (t: "text" | "video" | "audio" | "aiEdit") => void;
-  hasAudio: boolean;
   keyframesOpen: boolean;
   onToggleKeyframes: () => void;
   t: TFunction;
 }) {
-  // Available tabs depend on selection (SPEC §6.3).
-  const tabs: Array<"text" | "video" | "audio" | "aiEdit"> = [];
-  if (clip.mediaType === "text") tabs.push("text");
-  else tabs.push("video");
-  if (hasAudio) tabs.push("audio");
-
-  const activeTab = tabs.includes(tab as never) ? tab : tabs[0];
-
   // Live sampling: read the current playhead frame so every numeric field shows
   // the value at the playhead (upstream `InspectorView.livePreview`).
   const activeFrame = useEditorUiStore((s) => s.activeFrame);
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
   const mediaItem = useMediaStore((s) => s.items.find((m) => m.id === clip.mediaRef) ?? null);
+  // Available tabs depend on selection (SPEC §6.3). Visual source clips expose
+  // AI Edit; video with an embedded audio stream also exposes Audio. Missing
+  // source media keeps AI Edit visible and presents a typed unavailable state
+  // inside the tab instead of silently changing the tab set.
+  const tabs: Array<"text" | "video" | "audio" | "aiEdit"> = [];
+  if (clip.mediaType === "text") tabs.push("text");
+  else if (clip.mediaType === "audio") tabs.push("audio");
+  else {
+    tabs.push("video");
+    if (mediaItem?.hasAudio) tabs.push("audio");
+    tabs.push("aiEdit");
+  }
+
+  const activeTab = tabs.includes(tab as never) ? tab : tabs[0];
   const aspect = mediaCanvasAspect(
     mediaItem?.width,
     mediaItem?.height,
@@ -439,6 +471,8 @@ function ClipInspector({
     <div>
       {tabs.length > 1 && (
         <div
+          role="tablist"
+          aria-label={t("inspector.title")}
           style={{
             display: "flex",
             gap: "var(--space-md)",
@@ -448,12 +482,23 @@ function ClipInspector({
           {tabs.map((tabId) => (
             <button
               key={tabId}
+              type="button"
+              role="tab"
+              aria-selected={activeTab === tabId}
               onClick={() => setTab(tabId)}
               style={{
                 paddingBottom: 4,
                 fontSize: "var(--fs-sm-md)",
                 fontWeight: activeTab === tabId ? "var(--fw-medium)" : "var(--fw-regular)",
                 color: activeTab === tabId ? "var(--text-primary)" : "var(--text-tertiary)",
+                ...(tabId === "aiEdit"
+                  ? {
+                      background: "var(--ai-gradient)",
+                      WebkitBackgroundClip: "text",
+                      WebkitTextFillColor: "transparent",
+                      opacity: activeTab === tabId ? 1 : 0.6,
+                    }
+                  : {}),
                 borderBottom:
                   activeTab === tabId ? "var(--bw-medium) solid var(--text-primary)" : "none",
               }}
@@ -468,6 +513,12 @@ function ClipInspector({
         {clip.mediaType !== "text" && <SwapMediaSection clip={clip} t={t} />}
         {activeTab === "text" ? (
           <TextTab clip={clip} t={t} />
+        ) : activeTab === "aiEdit" ? (
+          <AiEditTab
+            clip={clip}
+            fps={timeline.fps}
+            unavailableReason={mediaItem?.missing ? t("inspector.aiEdit.unavailable") : null}
+          />
         ) : activeTab === "audio" ? (
           <section>
             <SectionHeader label={t("inspector.section.levels")} />
@@ -491,6 +542,9 @@ function ClipInspector({
               <KeyframeRowControls clip={clip} property="volume" activeFrame={activeFrame} t={t} />
             </Row>
             <FadeSection clip={clip} commit={commit} t={t} />
+            <LoudnessSection clip={clip} t={t} />
+            <DenoiseSection clip={clip} t={t} />
+            <StemSeparationSection sourceAssetId={clip.mediaRef} t={t} />
           </section>
         ) : (
           <>
@@ -596,6 +650,14 @@ function ClipInspector({
 
             <FadeSection clip={clip} commit={commit} t={t} />
 
+            {clip.mediaType === "video" && !clip.nestedSequenceId && (
+              <>
+                <MotionTrackingSection clip={clip} />
+                <StabilizationSection clip={clip} t={t} />
+                <MattingSection clip={clip} />
+              </>
+            )}
+
             <section>
               <SectionHeader label={t("inspector.section.playback")} />
               <Row label={t("inspector.field.speed")}>
@@ -952,31 +1014,680 @@ function ShaderEffectsSection({ clip, t }: { clip: Clip; t: TFunction }) {
   return (
     <>
       <ColorGradeSection clip={clip} t={t} />
+      <ColorMatchSection clip={clip} />
       <ChromaKeySection clip={clip} t={t} />
       <MaskSection clip={clip} t={t} />
+      {clip.mediaType === "video" && !clip.nestedSequenceId && (
+        <ObjectRemovalSection clip={clip} />
+      )}
+      <GenericEffectsSection clip={clip} t={t} />
     </>
   );
 }
 
+function GenericEffectsSection({ clip, t }: { clip: Clip; t: TFunction }) {
+  const [draft, setDraft] = useState<Effect[]>(() => clip.effects ?? []);
+  const [selectedName, setSelectedName] = useState<AdvertisedEffectName>("grayscale");
+
+  useEffect(() => setDraft(clip.effects ?? []), [clip.id, clip.effects]);
+
+  const commit = (next: Effect[]) => {
+    setDraft(next);
+    void edit.setEffects([clip.id], next);
+  };
+  const replace = (index: number, nextEffect: Effect) => {
+    const next = [...draft];
+    next[index] = nextEffect;
+    commit(next);
+  };
+  const move = (from: number, to: number) => {
+    if (to < 0 || to >= draft.length) return;
+    const next = [...draft];
+    const [moved] = next.splice(from, 1);
+    if (!moved) return;
+    next.splice(to, 0, moved);
+    commit(next);
+  };
+
+  return (
+    <section data-testid="generic-effects-section">
+      <SectionHeader label={t("inspector.section.effects")} icon={SlidersHorizontal} />
+      <div style={{ display: "flex", gap: SPACE.xs, padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+        <select
+          aria-label={t("inspector.effects.add")}
+          value={selectedName}
+          onChange={(event) => setSelectedName(event.target.value as AdvertisedEffectName)}
+          style={controlStyle}
+        >
+          {EFFECT_REGISTRY.map((effect) => (
+            <option key={effect.name} value={effect.name}>{t(effect.labelKey)}</option>
+          ))}
+        </select>
+        <button type="button" style={controlStyle} onClick={() => commit([...draft, newAdvertisedEffect(selectedName)])}>
+          {t("inspector.effects.add")}
+        </button>
+      </div>
+      {draft.length === 0 && (
+        <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--text-tertiary)" }}>
+          {t("inspector.effects.empty")}
+        </div>
+      )}
+      {draft.map((effect, index) => {
+        const advertised = isAdvertisedEffectName(effect.name);
+        const label = advertised
+          ? t(EFFECT_REGISTRY.find((item) => item.name === effect.name)!.labelKey)
+          : `${effect.name} (${t("inspector.effects.unknown")})`;
+        const amount = effect.params.amount ?? 1;
+        return (
+          <div
+            key={`${effect.name}-${index}`}
+            data-testid="generic-effect-item"
+            style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, borderTop: "var(--bw-thin) solid var(--border-primary)" }}
+          >
+            <div style={{ display: "flex", alignItems: "center", gap: SPACE.xs, paddingTop: SPACE.xs }}>
+              <input
+                aria-label={`${label} ${t("inspector.field.enabled")}`}
+                type="checkbox"
+                checked={effect.enabled}
+                style={checkboxStyle}
+                onChange={(event) => replace(index, { ...effect, enabled: event.target.checked })}
+              />
+              <span style={{ flex: 1 }}>{label}</span>
+              <button type="button" aria-label={t("inspector.effects.moveUp")} style={controlStyle} disabled={index === 0} onClick={() => move(index, index - 1)}>↑</button>
+              <button type="button" aria-label={t("inspector.effects.moveDown")} style={controlStyle} disabled={index === draft.length - 1} onClick={() => move(index, index + 1)}>↓</button>
+              <button type="button" aria-label={t("inspector.effects.remove")} style={controlStyle} onClick={() => commit(draft.filter((_, itemIndex) => itemIndex !== index))}>×</button>
+            </div>
+            {advertised && (
+              <Row label={t("inspector.effects.amount")}>
+                <input
+                  aria-label={`${label} ${t("inspector.effects.amount")}`}
+                  type="range"
+                  min={0}
+                  max={1}
+                  step={0.01}
+                  value={amount}
+                  onChange={(event) => replace(index, {
+                    ...effect,
+                    params: { amount: Number(event.target.value) },
+                  })}
+                />
+                <span className="tabular" style={{ marginLeft: SPACE.xs }}>{Math.round(amount * 100)}%</span>
+              </Row>
+            )}
+          </div>
+        );
+      })}
+    </section>
+  );
+}
+
+function LoudnessSection({ clip, t }: { clip: Clip; t: TFunction }) {
+  const normalization = clip.loudnessNormalization;
+  const [target, setTarget] = useState(normalization?.targetLufs ?? -16);
+  const [ceiling, setCeiling] = useState(normalization?.truePeakCeilingDbtp ?? -1);
+  const [analyzing, setAnalyzing] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    setTarget(clip.loudnessNormalization?.targetLufs ?? -16);
+    setCeiling(clip.loudnessNormalization?.truePeakCeilingDbtp ?? -1);
+    setAnalyzing(false);
+    setProgress(0);
+    setError(null);
+  }, [clip.id, clip.loudnessNormalization]);
+
+  const analyze = async () => {
+    setAnalyzing(true);
+    setProgress(0);
+    setError(null);
+    let unlisten = () => {};
+    try {
+      unlisten = await api.onLoudnessProgress(clip.id, ({ done, total }) => {
+        setProgress(total > 0 ? Math.min(1, done / total) : 0);
+      });
+      await edit.analyzeAndApplyLoudness(clip.id, target, ceiling);
+      setProgress(1);
+    } catch (reason) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      if (!/loudness_cancelled/i.test(message)) setError(message);
+    } finally {
+      unlisten();
+      setAnalyzing(false);
+    }
+  };
+
+  return (
+    <section data-testid="loudness-section" style={{ marginTop: SPACE.md }}>
+      <SectionHeader label={t("inspector.section.loudness")} />
+      <Row label={t("inspector.loudness.target")}>
+        <ScrubbableNumberField
+          value={target}
+          min={-36}
+          max={-5}
+          sensitivity={0.5}
+          format={(value) => value.toFixed(1)}
+          suffix=" LUFS"
+          width={70}
+          onCommit={setTarget}
+        />
+      </Row>
+      <Row label={t("inspector.loudness.ceiling")}>
+        <ScrubbableNumberField
+          value={ceiling}
+          min={-12}
+          max={0}
+          sensitivity={0.25}
+          format={(value) => value.toFixed(1)}
+          suffix=" dBTP"
+          width={70}
+          onCommit={setCeiling}
+        />
+      </Row>
+      {normalization && (
+        <div
+          data-testid="loudness-result"
+          style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}
+        >
+          {normalization.inputIntegratedLufs.toFixed(1)} → {normalization.outputIntegratedLufs.toFixed(1)} LUFS · {normalization.gainDb >= 0 ? "+" : ""}{normalization.gainDb.toFixed(1)} dB · {normalization.outputTruePeakDbtp.toFixed(1)} dBTP
+        </div>
+      )}
+      {analyzing && (
+        <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.xs}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}>
+          {t("inspector.loudness.analyzing")} {Math.round(progress * 100)}%
+        </div>
+      )}
+      <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+        <button type="button" style={controlStyle} disabled={analyzing} onClick={() => void analyze()}>
+          {normalization ? t("inspector.loudness.reanalyze") : t("inspector.loudness.analyzeApply")}
+        </button>
+        {(analyzing || normalization) && (
+          <button
+            type="button"
+            style={{ ...controlStyle, marginLeft: SPACE.xs }}
+            onClick={() => void (analyzing ? edit.cancelLoudnessAnalysis() : edit.setLoudnessNormalization(clip.id, null))}
+          >
+            {analyzing ? t("inspector.loudness.cancel") : t("inspector.loudness.reset")}
+          </button>
+        )}
+      </div>
+      {error && <div role="alert" style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--danger)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function DenoiseSection({ clip, t }: { clip: Clip; t: TFunction }) {
+  const denoise = clip.audioDenoise;
+  const [mode, setMode] = useState<DenoiseMode>(denoise?.mode ?? "adaptive");
+  const [strength, setStrength] = useState(denoise?.strength ?? 0.9);
+  const [previewEnabled, setPreviewEnabled] = useState(denoise?.previewEnabled ?? true);
+  const [applying, setApplying] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    setMode(clip.audioDenoise?.mode ?? "adaptive");
+    setStrength(clip.audioDenoise?.strength ?? 0.9);
+    setPreviewEnabled(clip.audioDenoise?.previewEnabled ?? true);
+    setApplying(false);
+    setProgress(0);
+    setError(null);
+  }, [clip.id, clip.audioDenoise]);
+
+  const apply = async () => {
+    setApplying(true);
+    setProgress(0);
+    setError(null);
+    let unlisten = () => {};
+    try {
+      unlisten = await api.onDenoiseProgress(clip.id, ({ done, total }) => {
+        setProgress(total > 0 ? Math.min(1, done / total) : 0);
+      });
+      await edit.prepareAndApplyAudioDenoise(clip.id, mode, strength, previewEnabled);
+      setProgress(1);
+    } catch (reason) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      if (!/denoise_cancelled/i.test(message)) setError(message);
+    } finally {
+      unlisten();
+      setApplying(false);
+    }
+  };
+
+  const togglePreview = (enabled: boolean) => {
+    setPreviewEnabled(enabled);
+    if (denoise) {
+      const updated: AudioDenoise = { ...denoise, previewEnabled: enabled };
+      void edit.setAudioDenoise(clip.id, updated).catch((reason) => {
+        setPreviewEnabled(denoise.previewEnabled);
+        setError(reason instanceof Error ? reason.message : String(reason));
+      });
+    }
+  };
+
+  return (
+    <section data-testid="denoise-section" style={{ marginTop: SPACE.md }}>
+      <SectionHeader label={t("inspector.section.denoise")} />
+      <Row label={t("inspector.denoise.mode")}>
+        <select
+          aria-label={t("inspector.denoise.mode")}
+          value={mode}
+          disabled={applying}
+          onChange={(event) => setMode(event.target.value as DenoiseMode)}
+          style={controlStyle}
+        >
+          <option value="adaptive">{t("inspector.denoise.mode.adaptive")}</option>
+          <option value="voice">{t("inspector.denoise.mode.voice")}</option>
+        </select>
+      </Row>
+      <Row label={t("inspector.denoise.strength")}>
+        <input
+          aria-label={t("inspector.denoise.strength")}
+          type="range"
+          min={0}
+          max={1}
+          step={0.01}
+          value={strength}
+          disabled={applying}
+          onChange={(event) => setStrength(Number(event.target.value))}
+        />
+        <span className="tabular" style={{ marginLeft: SPACE.xs }}>{Math.round(strength * 100)}%</span>
+      </Row>
+      <Row label={t("inspector.denoise.preview")}>
+        <input
+          aria-label={t("inspector.denoise.preview")}
+          type="checkbox"
+          checked={previewEnabled}
+          disabled={applying}
+          onChange={(event) => togglePreview(event.target.checked)}
+        />
+      </Row>
+      {denoise && (
+        <div
+          data-testid="denoise-result"
+          style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}
+        >
+          {t(`inspector.denoise.mode.${denoise.mode}`)} · {Math.round(denoise.strength * 100)}% · {denoise.previewEnabled ? t("inspector.denoise.previewOn") : t("inspector.denoise.previewOff")}
+        </div>
+      )}
+      {applying && (
+        <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.xs}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}>
+          {t("inspector.denoise.processing")} {Math.round(progress * 100)}%
+        </div>
+      )}
+      <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+        <button type="button" style={controlStyle} disabled={applying} onClick={() => void apply()}>
+          {denoise ? t("inspector.denoise.reapply") : t("inspector.denoise.apply")}
+        </button>
+        {(applying || denoise) && (
+          <button
+            type="button"
+            style={{ ...controlStyle, marginLeft: SPACE.xs }}
+            onClick={() => void (applying ? edit.cancelDenoiseAnalysis() : edit.setAudioDenoise(clip.id, null))}
+          >
+            {applying ? t("inspector.denoise.cancel") : t("inspector.denoise.reset")}
+          </button>
+        )}
+      </div>
+      {error && <div role="alert" style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--danger)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function StemSeparationSection({
+  sourceAssetId,
+  t,
+}: {
+  sourceAssetId: string;
+  t: TFunction;
+}) {
+  const [execution, setExecution] = useState<"local" | "hosted">("local");
+  const [provider, setProvider] = useState("");
+  const [model, setModel] = useState("");
+  const [uploadConfirmed, setUploadConfirmed] = useState(false);
+  const [running, setRunning] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [result, setResult] = useState<api.StemSeparationResult | null>(null);
+  const [imported, setImported] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const activeFrame = useEditorUiStore((state) => state.activeFrame);
+  const items = useMediaStore((state) => state.items);
+  const vocals = result ? items.find((item) => item.id === result.vocalsAssetId) : undefined;
+  const accompaniment = result
+    ? items.find((item) => item.id === result.accompanimentAssetId)
+    : undefined;
+
+  useEffect(() => {
+    setRunning(false);
+    setProgress(0);
+    setResult(null);
+    setImported(false);
+    setError(null);
+  }, [sourceAssetId]);
+
+  const separate = async () => {
+    setRunning(true);
+    setProgress(0);
+    setResult(null);
+    setError(null);
+    let unlisten = () => {};
+    try {
+      unlisten = await api.onStemSeparationProgress(sourceAssetId, ({ done, total }) => {
+        setProgress(total > 0 ? Math.min(1, done / total) : 0);
+      });
+      const separated = await api.separateAudioStems(
+        sourceAssetId,
+        execution,
+        execution === "hosted" ? provider : null,
+        execution === "hosted" ? model : null,
+        execution === "hosted" && uploadConfirmed,
+      );
+      setResult(separated);
+      setImported(false);
+      setProgress(1);
+    } catch (reason) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      if (!/stem_separation_cancelled/i.test(message)) {
+        if (/stem_hosted_privacy_confirmation_required/i.test(message)) {
+          setError(t("inspector.stems.error.confirm"));
+        } else if (/stem_hosted_provider_not_configured/i.test(message)) {
+          setError(t("inspector.stems.error.notConfigured"));
+        } else {
+          setError(message);
+        }
+      }
+    } finally {
+      unlisten();
+      setRunning(false);
+    }
+  };
+
+  const importToTracks = async () => {
+    if (!result) return;
+    setError(null);
+    try {
+      await api.importStemsToTracks(
+        result.vocalsAssetId,
+        result.accompanimentAssetId,
+        Math.max(0, activeFrame),
+      );
+      setImported(true);
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+    }
+  };
+
+  const undoStemImport = async () => {
+    try {
+      await edit.undo();
+      setImported(false);
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+    }
+  };
+
+  return (
+    <section data-testid="stem-separation-section" style={{ marginTop: SPACE.md }}>
+      <SectionHeader label={t("inspector.section.stems")} />
+      <Row label={t("inspector.stems.execution")}>
+        <select
+          aria-label={t("inspector.stems.execution")}
+          value={execution}
+          disabled={running}
+          onChange={(event) => setExecution(event.target.value as "local" | "hosted")}
+          style={controlStyle}
+        >
+          <option value="local">{t("inspector.stems.local")}</option>
+          <option value="hosted">{t("inspector.stems.hosted")}</option>
+        </select>
+      </Row>
+      <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}>
+        {execution === "local" ? t("inspector.stems.localPrivacy") : t("inspector.stems.hostedPrivacy")}
+      </div>
+      {execution === "hosted" && (
+        <>
+          <Row label={t("inspector.stems.provider")}>
+            <input
+              aria-label={t("inspector.stems.provider")}
+              value={provider}
+              disabled={running}
+              onChange={(event) => setProvider(event.target.value)}
+              style={controlStyle}
+            />
+          </Row>
+          <Row label={t("inspector.stems.model")}>
+            <input
+              aria-label={t("inspector.stems.model")}
+              value={model}
+              disabled={running}
+              onChange={(event) => setModel(event.target.value)}
+              style={controlStyle}
+            />
+          </Row>
+          <Row label={t("inspector.stems.confirmUpload")}>
+            <input
+              aria-label={t("inspector.stems.confirmUpload")}
+              type="checkbox"
+              checked={uploadConfirmed}
+              disabled={running}
+              onChange={(event) => setUploadConfirmed(event.target.checked)}
+            />
+          </Row>
+        </>
+      )}
+      {running && (
+        <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.xs}px`, color: "var(--text-tertiary)", fontSize: FS.xs }}>
+          {t("inspector.stems.processing")} {Math.round(progress * 100)}%
+        </div>
+      )}
+      {result && (
+        <div data-testid="stem-separation-result" style={{ padding: `0 ${SPACE.lg}px ${SPACE.xs}px`, color: "var(--accent-primary)", fontSize: FS.xs, display: "flex", flexDirection: "column", gap: SPACE.xs }}>
+          <span>{t("inspector.stems.complete")} · {result.execution}</span>
+          {vocals?.path && <audio controls src={assetUrl(vocals.path) ?? undefined} aria-label={t("inspector.stems.auditionVocals")} />}
+          {accompaniment?.path && <audio controls src={assetUrl(accompaniment.path) ?? undefined} aria-label={t("inspector.stems.auditionAccompaniment")} />}
+          {imported ? (
+            <button type="button" style={controlStyle} onClick={() => void undoStemImport()}>
+              {t("inspector.stems.undoImport")}
+            </button>
+          ) : (
+            <button type="button" style={controlStyle} onClick={() => void importToTracks()}>
+              {t("inspector.stems.importTracks")}
+            </button>
+          )}
+        </div>
+      )}
+      <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+        <button type="button" style={controlStyle} disabled={running} onClick={() => void separate()}>
+          {t("inspector.stems.separate")}
+        </button>
+        {running && (
+          <button type="button" style={{ ...controlStyle, marginLeft: SPACE.xs }} onClick={() => void api.cancelStemSeparation()}>
+            {t("inspector.stems.cancel")}
+          </button>
+        )}
+      </div>
+      {error && <div role="alert" style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--danger)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function StabilizationSection({ clip, t }: { clip: Clip; t: TFunction }) {
+  const [analyzing, setAnalyzing] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const solution = clip.stabilization;
+
+  useEffect(() => {
+    setAnalyzing(false);
+    setError(null);
+  }, [clip.id]);
+
+  const analyze = async () => {
+    setAnalyzing(true);
+    setError(null);
+    try {
+      await edit.analyzeAndApplyStabilization(clip.id);
+    } catch (reason) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      if (!/\bcancell?ed\b/i.test(message)) setError(message);
+    } finally {
+      setAnalyzing(false);
+    }
+  };
+
+  return (
+    <section data-testid="stabilization-section">
+      <SectionHeader label={t("inspector.section.stabilization")} />
+      {!solution ? (
+        <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+          <button type="button" style={controlStyle} disabled={analyzing} onClick={() => void analyze()}>
+            {analyzing
+              ? t("inspector.stabilization.analyzing")
+              : t("inspector.stabilization.analyzeApply")}
+          </button>
+          {analyzing && (
+            <button
+              type="button"
+              style={{ ...controlStyle, marginLeft: SPACE.xs }}
+              onClick={() => void edit.cancelStabilizationAnalysis()}
+            >
+              {t("inspector.stabilization.cancel")}
+            </button>
+          )}
+        </div>
+      ) : (
+        <>
+          <Row label={t("inspector.stabilization.strength")}>
+            <ScrubbableNumberField
+              value={solution.strength * 100}
+              min={0}
+              max={100}
+              sensitivity={1}
+              format={(value) => value.toFixed(0)}
+              suffix="%"
+              width={56}
+              onCommit={(value) =>
+                void edit.adjustStabilization(clip.id, { strength: value / 100 })
+              }
+            />
+          </Row>
+          <Row label={t("inspector.stabilization.cropMargin")}>
+            <ScrubbableNumberField
+              value={solution.cropMargin * 100}
+              min={0}
+              max={50}
+              sensitivity={0.5}
+              format={(value) => value.toFixed(1)}
+              suffix="%"
+              width={56}
+              onCommit={(value) =>
+                void edit.adjustStabilization(clip.id, { cropMargin: value / 100 })
+              }
+            />
+          </Row>
+          <div
+            style={{
+              padding: `0 ${SPACE.lg}px ${SPACE.sm}px`,
+              color: "var(--text-tertiary)",
+              fontSize: FS.xs,
+            }}
+          >
+            {solution.model} v{solution.modelVersion} · {solution.keyframes.length}{" "}
+            {t("inspector.stabilization.samples")}
+          </div>
+          <div style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px` }}>
+            <button
+              type="button"
+              style={controlStyle}
+              disabled={analyzing}
+              onClick={() => void analyze()}
+            >
+              {analyzing
+                ? t("inspector.stabilization.analyzing")
+                : t("inspector.stabilization.reanalyze")}
+            </button>
+            <button
+              type="button"
+              style={{ ...controlStyle, marginLeft: SPACE.xs }}
+              onClick={() =>
+                void (analyzing
+                  ? edit.cancelStabilizationAnalysis()
+                  : edit.resetStabilization(clip.id))
+              }
+            >
+              {analyzing
+                ? t("inspector.stabilization.cancel")
+                : t("inspector.stabilization.reset")}
+            </button>
+          </div>
+        </>
+      )}
+      {error && (
+        <div role="alert" style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--danger)" }}>
+          {error}
+        </div>
+      )}
+    </section>
+  );
+}
+
 function ColorGradeSection({ clip, t }: { clip: Clip; t: TFunction }) {
   const [draft, setDraft] = useState<ColorGrade>(() => completeColorGrade(clip.colorGrade));
+  const [lutIntensity, setLutIntensity] = useState(clip.lut?.intensity ?? 1);
+  const [lutError, setLutError] = useState<string | null>(null);
 
   useEffect(() => {
     setDraft(completeColorGrade(clip.colorGrade));
-  }, [clip.id, clip.colorGrade]);
+    setLutIntensity(clip.lut?.intensity ?? 1);
+  }, [clip.id, clip.colorGrade, clip.lut]);
+
+  const importLut = async () => {
+    setLutError(null);
+    try {
+      const open = await openDialog();
+      if (!open) return;
+      const selected = await open({
+        directory: false,
+        multiple: false,
+        filters: [{ name: "3D LUT", extensions: ["cube"] }],
+      });
+      if (typeof selected !== "string") return;
+      const reference = await api.importLut(selected);
+      await edit.setLut([clip.id], reference);
+    } catch (error) {
+      setLutError(error instanceof Error ? error.message : String(error));
+    }
+  };
 
   const commitGrade = (next: ColorGrade) => {
     setDraft(next);
     void edit.setColorGrade([clip.id], next);
   };
-  const updateField = (field: keyof Omit<ColorGrade, "liftGammaGain">, value: number) =>
+  const updateField = (field: keyof Omit<ColorGrade, "liftGammaGain" | "hslSecondary">, value: number) =>
     setDraft((g) => ({ ...g, [field]: value }));
-  const commitField = (field: keyof Omit<ColorGrade, "liftGammaGain">, value: number) =>
+  const commitField = (field: keyof Omit<ColorGrade, "liftGammaGain" | "hslSecondary">, value: number) =>
     commitGrade({ ...draft, [field]: value });
   const updateLgg = (band: keyof ColorGrade["liftGammaGain"], channel: keyof Rgb, value: number) =>
     setDraft((g) => setLggChannel(g, band, channel, value));
   const commitLgg = (band: keyof ColorGrade["liftGammaGain"], channel: keyof Rgb, value: number) =>
     commitGrade(setLggChannel(draft, band, channel, value));
+  const defaultSecondary = (): HslSecondary => ({
+    hueCenter: 0,
+    hueWidth: 0.24,
+    feather: 0.08,
+    hueShift: 0,
+    saturation: 0,
+    lightness: 0,
+  });
+  const secondary = draft.hslSecondary ?? defaultSecondary();
+  const setSecondaryEnabled = (enabled: boolean) =>
+    commitGrade({ ...draft, hslSecondary: enabled ? secondary : undefined });
+  const updateSecondary = (field: keyof HslSecondary, value: number) =>
+    setDraft((grade) => ({
+      ...grade,
+      hslSecondary: { ...(grade.hslSecondary ?? defaultSecondary()), [field]: value },
+    }));
+  const commitSecondary = (field: keyof HslSecondary, value: number) =>
+    commitGrade({ ...draft, hslSecondary: { ...secondary, [field]: value } });
 
   return (
     <section>
@@ -1017,7 +1728,7 @@ function ColorGradeSection({ clip, t }: { clip: Clip; t: TFunction }) {
             key={`${band}-${channel}`}
             label={t(`inspector.field.${band}${channel.toUpperCase()}`)}
             value={draft.liftGammaGain[band][channel]}
-            min={band === "lift" ? -1 : 0}
+            min={band === "lift" ? -1 : band === "gamma" ? 0.01 : 0}
             max={band === "lift" ? 1 : 4}
             sensitivity={band === "lift" ? 0.005 : 0.01}
             format={(v) => v.toFixed(2)}
@@ -1047,6 +1758,87 @@ function ColorGradeSection({ clip, t }: { clip: Clip; t: TFunction }) {
         onChange={(v) => updateField("saturation", v)}
         onCommit={(v) => commitField("saturation", v)}
       />
+      <SectionHeader label={t("inspector.section.lut")} />
+      <Row label={t("inspector.field.lutFile")}>
+        <div style={{ display: "flex", alignItems: "center", gap: SPACE.xs, minWidth: 0 }}>
+          <span
+            title={clip.lut?.name}
+            style={{ color: "var(--text-secondary)", overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}
+          >
+            {clip.lut?.name ?? t("inspector.value.noLut")}
+          </span>
+          <button type="button" style={controlStyle} onClick={() => void importLut()}>
+            {t("inspector.action.importLut")}
+          </button>
+          {clip.lut && (
+            <button type="button" style={controlStyle} onClick={() => void edit.setLut([clip.id], null)}>
+              {t("inspector.action.removeLut")}
+            </button>
+          )}
+        </div>
+      </Row>
+      {clip.lut && (
+        <EffectNumberRow
+          label={t("inspector.field.lutIntensity")}
+          value={lutIntensity}
+          min={0}
+          max={1}
+          sensitivity={0.005}
+          format={(value) => value.toFixed(3)}
+          onChange={setLutIntensity}
+          onCommit={(intensity) => void edit.setLut([clip.id], { ...clip.lut!, intensity })}
+        />
+      )}
+      {lutError && (
+        <div role="alert" style={{ padding: `0 ${SPACE.lg}px ${SPACE.sm}px`, color: "var(--danger)" }}>
+          {lutError}
+        </div>
+      )}
+      <div style={{ display: "flex", alignItems: "center", justifyContent: "space-between" }}>
+        <SectionHeader label={t("inspector.section.hslSecondary")} />
+        <HoverButton
+          title={t("inspector.action.resetHslSecondary")}
+          disabled={!draft.hslSecondary}
+          onClick={() => commitGrade({ ...draft, hslSecondary: undefined })}
+          size={18}
+        >
+          <Icon icon={RotateCcw} size={12} />
+        </HoverButton>
+      </div>
+      <Row label={t("inspector.field.enabled")}>
+        <input
+          type="checkbox"
+          checked={draft.hslSecondary != null}
+          style={checkboxStyle}
+          onChange={(event) => setSecondaryEnabled(event.target.checked)}
+        />
+      </Row>
+      {draft.hslSecondary && (
+        <>
+          {([
+            ["hueCenter", 0, 1, 0.005],
+            ["hueWidth", 0.01, 1, 0.005],
+            ["feather", 0, 0.5, 0.005],
+            ["hueShift", -0.5, 0.5, 0.005],
+            ["saturation", -1, 1, 0.005],
+            ["lightness", -1, 1, 0.005],
+          ] as Array<[keyof HslSecondary, number, number, number]>).map(
+            ([field, min, max, sensitivity]) => (
+              <EffectNumberRow
+                key={field}
+                label={t(`inspector.field.hsl.${field}`)}
+                value={secondary[field]}
+                min={min}
+                max={max}
+                sensitivity={sensitivity}
+                format={(value) => value.toFixed(3)}
+                onChange={(value) => updateSecondary(field, value)}
+                onCommit={(value) => commitSecondary(field, value)}
+              />
+            ),
+          )}
+        </>
+      )}
     </section>
   );
 }
@@ -1170,9 +1962,9 @@ function MaskSection({ clip, t }: { clip: Clip; t: TFunction }) {
     }
   };
   const setShape = (shape: MaskShape) => commitMask({ ...draft, shape });
-  const updateCommon = (field: keyof Omit<Mask, "shape">, value: number | boolean) =>
+  const updateCommon = (field: "feather" | "invert", value: number | boolean) =>
     setDraft((m) => ({ ...m, [field]: value }));
-  const commitCommon = (field: keyof Omit<Mask, "shape">, value: number | boolean) =>
+  const commitCommon = (field: "feather" | "invert", value: number | boolean) =>
     commitMask({ ...draft, [field]: value });
 
   return (
@@ -1195,12 +1987,13 @@ function MaskSection({ clip, t }: { clip: Clip; t: TFunction }) {
                 const kind = e.target.value;
                 if (kind === "circle") setShape(defaultCircleShape());
                 else if (kind === "linear") setShape(defaultLinearShape());
+                else if (kind === "poly") setShape(defaultPolyShape());
               }}
               style={controlStyle}
             >
               <option value="circle">{t("inspector.mask.circle")}</option>
               <option value="linear">{t("inspector.mask.linear")}</option>
-              <option value="poly" disabled>
+              <option value="poly">
                 {t("inspector.mask.polyPending")}
               </option>
             </select>
@@ -1219,7 +2012,20 @@ function MaskSection({ clip, t }: { clip: Clip; t: TFunction }) {
               setDraftShape={(shape) => setDraft((m) => ({ ...m, shape }))}
               t={t}
             />
-          ) : null}
+          ) : (
+            <PolyMaskFields
+              shape={draft.shape}
+              setShape={setShape}
+              setDraftShape={(shape) => setDraft((m) => ({ ...m, shape }))}
+              t={t}
+            />
+          )}
+          <MaskTransformFields
+            mask={draft}
+            setDraft={setDraft}
+            commitMask={commitMask}
+            t={t}
+          />
           <EffectNumberRow
             label={t("inspector.field.feather")}
             value={draft.feather}
@@ -1238,6 +2044,13 @@ function MaskSection({ clip, t }: { clip: Clip; t: TFunction }) {
               onChange={(e) => commitCommon("invert", e.target.checked)}
             />
           </Row>
+          <button
+            type="button"
+            onClick={() => setMaskEnabled(false)}
+            style={{ ...controlStyle, width: "100%", marginTop: SPACE.xs, color: "#ff8f8f" }}
+          >
+            {t("inspector.mask.delete")}
+          </button>
         </>
       )}
     </section>
@@ -1344,6 +2157,109 @@ function LinearMaskFields({
   );
 }
 
+function PolyMaskFields({
+  shape,
+  setShape,
+  setDraftShape,
+  t,
+}: {
+  shape: Extract<MaskShape, { kind: "poly" }>;
+  setShape: (shape: MaskShape) => void;
+  setDraftShape: (shape: MaskShape) => void;
+  t: TFunction;
+}) {
+  const updatePoint = (index: number, axis: keyof RgbPoint, value: number, commit: boolean) => {
+    const points = shape.points.map((point, pointIndex) =>
+      pointIndex === index ? { ...point, [axis]: value } : point,
+    );
+    if (commit) setShape({ ...shape, points });
+    else setDraftShape({ ...shape, points });
+  };
+  const addPoint = () => {
+    if (shape.points.length >= 16) return;
+    const last = shape.points[shape.points.length - 1] ?? { x: 0.5, y: 0.5 };
+    setShape({
+      ...shape,
+      points: [...shape.points, { x: Math.min(1, last.x + 0.05), y: Math.min(1, last.y + 0.05) }],
+    });
+  };
+  const deletePoint = (index: number) => {
+    if (shape.points.length <= 3) return;
+    setShape({ ...shape, points: shape.points.filter((_, pointIndex) => pointIndex !== index) });
+  };
+
+  return (
+    <>
+      {shape.points.map((point, index) => (
+        <div key={index} style={{ borderTop: "1px solid rgba(255,255,255,0.06)", paddingTop: SPACE.xs }}>
+          <MaskNumberRow
+            label={`P${index + 1} X`}
+            value={point.x}
+            min={0}
+            max={1}
+            onChange={(value) => updatePoint(index, "x", value, false)}
+            onCommit={(value) => updatePoint(index, "x", value, true)}
+          />
+          <MaskNumberRow
+            label={`P${index + 1} Y`}
+            value={point.y}
+            min={0}
+            max={1}
+            onChange={(value) => updatePoint(index, "y", value, false)}
+            onCommit={(value) => updatePoint(index, "y", value, true)}
+          />
+          <button
+            type="button"
+            disabled={shape.points.length <= 3}
+            onClick={() => deletePoint(index)}
+            style={{ ...controlStyle, width: "100%", opacity: shape.points.length <= 3 ? 0.45 : 1 }}
+          >
+            {t("inspector.mask.deletePoint")} {index + 1}
+          </button>
+        </div>
+      ))}
+      <button
+        type="button"
+        disabled={shape.points.length >= 16}
+        onClick={addPoint}
+        style={{ ...controlStyle, width: "100%", marginTop: SPACE.xs }}
+      >
+        {t("inspector.mask.addPoint")}
+      </button>
+    </>
+  );
+}
+
+function MaskTransformFields({
+  mask,
+  setDraft,
+  commitMask,
+  t,
+}: {
+  mask: Mask;
+  setDraft: Dispatch<SetStateAction<Mask>>;
+  commitMask: (mask: Mask) => void;
+  t: TFunction;
+}) {
+  const transform = completeMaskTransform(mask.transform);
+  const update = (next: typeof transform, commit: boolean) => {
+    if (commit) commitMask({ ...mask, transform: next });
+    else setDraft((current) => ({ ...current, transform: next }));
+  };
+  const pointField = (field: "offset" | "scale", axis: keyof RgbPoint, value: number, commit: boolean) =>
+    update({ ...transform, [field]: { ...transform[field], [axis]: value } }, commit);
+
+  return (
+    <>
+      <MaskNumberRow label={t("inspector.mask.offsetX")} value={transform.offset.x} onChange={(v) => pointField("offset", "x", v, false)} onCommit={(v) => pointField("offset", "x", v, true)} />
+      <MaskNumberRow label={t("inspector.mask.offsetY")} value={transform.offset.y} onChange={(v) => pointField("offset", "y", v, false)} onCommit={(v) => pointField("offset", "y", v, true)} />
+      <MaskNumberRow label={t("inspector.mask.scaleX")} value={transform.scale.x} min={0.05} max={4} onChange={(v) => pointField("scale", "x", v, false)} onCommit={(v) => pointField("scale", "x", v, true)} />
+      <MaskNumberRow label={t("inspector.mask.scaleY")} value={transform.scale.y} min={0.05} max={4} onChange={(v) => pointField("scale", "y", v, false)} onCommit={(v) => pointField("scale", "y", v, true)} />
+      <EffectNumberRow label={t("inspector.mask.rotation")} value={transform.rotationDegrees} min={-180} max={180} sensitivity={0.5} format={(v) => `${v.toFixed(1)}°`} onChange={(v) => update({ ...transform, rotationDegrees: v }, false)} onCommit={(v) => update({ ...transform, rotationDegrees: v }, true)} />
+    </>
+  );
+}
+
 function EffectNumberRow({
   label,
   value,
@@ -1432,6 +2348,7 @@ function completeColorGrade(grade: ColorGrade | undefined): ColorGrade {
     },
     contrast: grade?.contrast ?? 0,
     saturation: grade?.saturation ?? 1,
+    hslSecondary: grade?.hslSecondary ? { ...grade.hslSecondary } : undefined,
   };
 }
 
@@ -1449,6 +2366,15 @@ function completeMask(mask: Mask | undefined): Mask {
     shape: mask?.shape ?? defaultCircleShape(),
     feather: mask?.feather ?? 0,
     invert: mask?.invert ?? false,
+    transform: completeMaskTransform(mask?.transform),
+  };
+}
+
+function completeMaskTransform(transform: Mask["transform"]) {
+  return {
+    offset: { x: transform?.offset.x ?? 0, y: transform?.offset.y ?? 0 },
+    scale: { x: transform?.scale.x ?? 1, y: transform?.scale.y ?? 1 },
+    rotationDegrees: transform?.rotationDegrees ?? 0,
   };
 }
 
@@ -1468,6 +2394,18 @@ function defaultLinearShape(): Extract<MaskShape, { kind: "linear" }> {
   };
 }
 
+function defaultPolyShape(): Extract<MaskShape, { kind: "poly" }> {
+  return {
+    kind: "poly",
+    points: [
+      { x: 0.25, y: 0.25 },
+      { x: 0.75, y: 0.25 },
+      { x: 0.75, y: 0.75 },
+      { x: 0.25, y: 0.75 },
+    ],
+  };
+}
+
 function setLggChannel(
   grade: ColorGrade,
   band: keyof ColorGrade["liftGammaGain"],
@@ -1581,13 +2519,96 @@ function MediaAssetSource({ asset, t }: { asset: MediaItem; t: TFunction }) {
           <MetaRow label={t("inspector.source.size")} value={formatFileSize(asset.fileSize)} />
         )}
         {asset.path && <MetaRow label={t("inspector.source.path")} value={asset.path} />}
+        {asset.isHdr && (
+          <MetaRow
+            label={t("inspector.source.hdr")}
+            value={t("inspector.source.hdrDelivery", {
+              transfer: asset.color?.transfer ?? "HDR",
+            })}
+          />
+        )}
       </section>
 
+      {asset.type === "video" && <ProxyMediaSection asset={asset} t={t} />}
+
       {gen && <GenerationSections gen={gen} t={t} />}
     </div>
   );
 }
 
+function ProxyMediaSection({ asset, t }: { asset: MediaItem; t: TFunction }) {
+  const [running, setRunning] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    setRunning(false);
+    setProgress(0);
+    setError(null);
+  }, [asset.id]);
+
+  const create = async () => {
+    setRunning(true);
+    setProgress(0);
+    setError(null);
+    let unlisten = () => {};
+    try {
+      unlisten = await api.onMediaProxyProgress(asset.id, ({ done, total }) => {
+        setProgress(total > 0 ? Math.min(100, Math.round((done / total) * 100)) : 0);
+      });
+      await api.createMediaProxy(asset.id);
+      setProgress(100);
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+    } finally {
+      unlisten();
+      setRunning(false);
+    }
+  };
+
+  const remove = async () => {
+    setError(null);
+    try {
+      await api.removeMediaProxy(asset.id);
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+    }
+  };
+
+  return (
+    <section data-testid="media-proxy-section">
+      <SectionHeader label={t("inspector.source.proxy")} />
+      {asset.proxyPath ? (
+        <MetaRow
+          label={t("inspector.source.proxy")}
+          value={t("inspector.source.proxyReady", {
+            width: asset.proxyWidth ?? 0,
+            height: asset.proxyHeight ?? 0,
+          })}
+        />
+      ) : null}
+      <button
+        type="button"
+        disabled={running || asset.missing}
+        onClick={() => void (asset.proxyPath ? remove() : create())}
+        style={controlStyle}
+      >
+        {running
+          ? t("inspector.source.proxyCreating", { progress })
+          : asset.proxyPath
+            ? t("inspector.source.proxyRemove")
+            : t("inspector.source.proxyCreate")}
+      </button>
+      {running && (
+        <button type="button" onClick={() => void api.cancelMediaProxy()} style={controlStyle}>
+          {t("common.cancel")}
+        </button>
+      )}
+      {error && <div style={{ color: "var(--destructive)", fontSize: FS.xs }}>{error}</div>}
+    </section>
+  );
+}
+
 /** Small "AI" pill shown beside a generated asset's name (upstream `aiBadge`). */
 function AiBadge({ t }: { t: TFunction }) {
   return (
@@ -1619,11 +2640,14 @@ function GenerationSections({ gen, t }: { gen: GenerationInput; t: TFunction })
     ...(gen.referenceVideoAssetIds ?? []),
     ...(gen.referenceAudioAssetIds ?? []),
   ];
-  const references = useMediaStore((s) =>
-    referenceIds
-      .map((id) => s.items.find((m) => m.id === id))
-      .filter((m): m is MediaItem => m != null),
-  );
+  // Select the stable catalog array, then derive references during render.
+  // Returning a freshly allocated array from the Zustand selector makes
+  // useSyncExternalStore treat every snapshot as changed and sends generated
+  // assets into an infinite render loop (blanking the whole WebView).
+  const mediaItems = useMediaStore((s) => s.items);
+  const references = referenceIds
+    .map((id) => mediaItems.find((m) => m.id === id))
+    .filter((m): m is MediaItem => m != null);
   return (
     <>
       {references.length > 0 && (
diff --git a/web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx b/web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx
new file mode 100644
index 00000000..4fa4ed57
--- /dev/null
+++ b/web/src/components/inspector/KeyframesLaneRow.interaction.test.tsx
@@ -0,0 +1,323 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import type { Clip } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+
+const editSpies = vi.hoisted(() => ({
+  moveKeyframe: vi.fn(),
+  removeKeyframe: vi.fn(),
+  setKeyframeInterpolation: vi.fn(),
+  setKeyframes: vi.fn(),
+  stampKeyframe: vi.fn(),
+}));
+
+vi.mock("../../store/editActions", () => editSpies);
+
+import { KeyframesLaneRow } from "./KeyframesLaneRow";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+const clip: Clip = {
+  id: "clip-1",
+  mediaRef: "media-1",
+  mediaType: "video",
+  sourceClipType: "video",
+  startFrame: 100,
+  durationFrames: 20,
+  trimStartFrame: 0,
+  trimEndFrame: 20,
+  speed: 1,
+  volume: 1,
+  fadeInFrames: 0,
+  fadeOutFrames: 0,
+  fadeInInterpolation: "linear",
+  fadeOutInterpolation: "linear",
+  opacity: 1,
+  transform: { position: { x: 0, y: 0 }, scale: { x: 1, y: 1 }, rotationDegrees: 0 },
+  crop: { top: 0, right: 0, bottom: 0, left: 0 },
+  opacityTrack: { kind: "scalar", keyframes: [] },
+};
+
+let container: HTMLDivElement;
+let root: Root;
+
+beforeEach(async () => {
+  vi.clearAllMocks();
+  for (const spy of Object.values(editSpies)) spy.mockResolvedValue(undefined);
+  useEditorUiStore.setState({ activeFrame: 100, toast: null });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  await act(async () => {
+    root.render(
+      <KeyframesLaneRow
+        clip={clip}
+        property="opacity"
+        t={(key) => key}
+      />,
+    );
+  });
+});
+
+async function renderOpacityKeyframe(): Promise<void> {
+  await act(async () => {
+    root.render(
+      <KeyframesLaneRow
+        clip={{
+          ...clip,
+          opacityTrack: {
+            kind: "scalar",
+            keyframes: [{ frame: 5, value: 0.5, interpolation: "linear" }],
+          },
+        }}
+        property="opacity"
+        t={(key, vars) => {
+          if (key === "inspector.keyframes.diamondLabel") {
+            return `${vars?.property} keyframe at frame ${vars?.frame}`;
+          }
+          return vars?.error ? `${key}:${vars.error}` : key;
+        }}
+      />,
+    );
+  });
+  const lane = container.querySelector<HTMLElement>("[data-keyframe-lane]");
+  lane!.getBoundingClientRect = () =>
+    ({ left: 100, width: 200, right: 300, top: 0, bottom: 22, height: 22 }) as DOMRect;
+}
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+});
+
+it("control-75a9964d0b81961a keyframe lane seek", async () => {
+  const lane = container.querySelector<HTMLElement>("[data-keyframe-lane]");
+  expect(lane).not.toBeNull();
+  expect(lane?.getAttribute("role")).toBe("slider");
+  expect(lane?.tabIndex).toBe(0);
+  expect(lane?.getAttribute("aria-label")).toBe("inspector.keyframes.property.opacity");
+
+  lane!.getBoundingClientRect = () =>
+    ({ left: 100, width: 200, right: 300, top: 0, bottom: 22, height: 22 }) as DOMRect;
+
+  await act(async () => {
+    lane?.dispatchEvent(new MouseEvent("click", { bubbles: true, clientX: 200 }));
+  });
+  expect(useEditorUiStore.getState().activeFrame).toBe(110);
+
+  const child = lane?.firstElementChild;
+  await act(async () => {
+    child?.dispatchEvent(new MouseEvent("click", { bubbles: true, clientX: 260 }));
+  });
+  expect(useEditorUiStore.getState().activeFrame).toBe(110);
+
+  const contextMenu = new MouseEvent("contextmenu", { bubbles: true, cancelable: true });
+  expect(lane?.dispatchEvent(contextMenu)).toBe(false);
+  expect(useEditorUiStore.getState().activeFrame).toBe(110);
+  expect(Object.values(editSpies).every((spy) => spy.mock.calls.length === 0)).toBe(true);
+
+  lane?.focus();
+  await act(async () => {
+    lane?.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowRight", bubbles: true }));
+  });
+  expect(document.activeElement).toBe(lane);
+  expect(useEditorUiStore.getState().activeFrame).toBe(111);
+  expect(lane?.getAttribute("aria-valuenow")).toBe("111");
+});
+
+it("control-4e0a20c7d0e54f3e keyframe diamond drag/context menu", async () => {
+  await renderOpacityKeyframe();
+  const diamond = container.querySelector<HTMLElement>("[data-keyframe-diamond='105']");
+  expect(diamond).not.toBeNull();
+  expect(diamond?.getAttribute("role")).toBe("button");
+  expect(diamond?.tabIndex).toBe(0);
+  expect(diamond?.getAttribute("aria-label")).toContain("105");
+
+  await act(async () => {
+    diamond?.dispatchEvent(new MouseEvent("mousedown", { bubbles: true, clientX: 150 }));
+    window.dispatchEvent(new MouseEvent("mouseup", { bubbles: true, clientX: 150 }));
+  });
+  expect(editSpies.moveKeyframe).not.toHaveBeenCalled();
+
+  await act(async () => {
+    diamond?.dispatchEvent(new MouseEvent("mousedown", { bubbles: true, clientX: 150 }));
+    window.dispatchEvent(new MouseEvent("mousemove", { bubbles: true, clientX: 240 }));
+    window.dispatchEvent(new MouseEvent("mouseup", { bubbles: true, clientX: 240 }));
+  });
+  expect(editSpies.moveKeyframe).toHaveBeenCalledTimes(1);
+  expect(editSpies.moveKeyframe).toHaveBeenLastCalledWith("clip-1", "opacity", 105, 114);
+
+  vi.clearAllMocks();
+  await act(async () => {
+    diamond?.dispatchEvent(new MouseEvent("contextmenu", {
+      bubbles: true,
+      cancelable: true,
+      clientX: 44,
+      clientY: 55,
+    }));
+  });
+  const menu = container.querySelector<HTMLElement>("[data-keyframe-context-menu]");
+  expect(menu?.style.left).toBe("44px");
+  expect(menu?.style.top).toBe("55px");
+  expect(Object.values(editSpies).every((spy) => spy.mock.calls.length === 0)).toBe(true);
+
+  await act(async () => {
+    diamond?.focus();
+    diamond?.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowRight", bubbles: true }));
+  });
+  expect(document.activeElement).toBe(diamond);
+  expect(editSpies.moveKeyframe).toHaveBeenCalledTimes(1);
+  expect(editSpies.moveKeyframe).toHaveBeenLastCalledWith("clip-1", "opacity", 105, 106);
+
+  editSpies.moveKeyframe.mockRejectedValueOnce(new Error("occupied"));
+  await act(async () => {
+    diamond?.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowLeft", bubbles: true }));
+    await Promise.resolve();
+  });
+  expect(useEditorUiStore.getState().toast?.message).toBe(
+    "inspector.keyframes.moveFailed:occupied",
+  );
+});
+
+it("control-6e36c47f93f0d4fb dismiss keyframe context menu", async () => {
+  await renderOpacityKeyframe();
+  const diamond = container.querySelector<HTMLElement>("[data-keyframe-diamond='105']")!;
+
+  diamond.focus();
+  await act(async () => {
+    diamond.dispatchEvent(new MouseEvent("contextmenu", { bubbles: true, cancelable: true }));
+  });
+  expect(container.querySelector("[role='menu']")).not.toBeNull();
+  expect(document.activeElement?.getAttribute("role")).toBe("menu");
+
+  const backdrop = container.querySelector<HTMLElement>("[data-keyframe-menu-backdrop]")!;
+  await act(async () => backdrop.dispatchEvent(new MouseEvent("click", { bubbles: true })));
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+  expect(Object.values(editSpies).every((spy) => spy.mock.calls.length === 0)).toBe(true);
+
+  await act(async () => {
+    diamond.dispatchEvent(new MouseEvent("contextmenu", { bubbles: true, cancelable: true }));
+  });
+  const secondBackdrop = container.querySelector<HTMLElement>("[data-keyframe-menu-backdrop]")!;
+  const dismissContextMenu = new MouseEvent("contextmenu", { bubbles: true, cancelable: true });
+  await act(async () => {
+    expect(secondBackdrop.dispatchEvent(dismissContextMenu)).toBe(false);
+  });
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+
+  await act(async () => {
+    diamond.dispatchEvent(new KeyboardEvent("keydown", { key: "ContextMenu", bubbles: true }));
+  });
+  const menu = container.querySelector<HTMLElement>("[role='menu']")!;
+  await act(async () => {
+    menu.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }));
+  });
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+  expect(Object.values(editSpies).every((spy) => spy.mock.calls.length === 0)).toBe(true);
+});
+
+it("control-c191a17716450b1a delete keyframe", async () => {
+  await renderOpacityKeyframe();
+  const diamond = container.querySelector<HTMLElement>("[data-keyframe-diamond='105']")!;
+  diamond.focus();
+  await act(async () => {
+    diamond.dispatchEvent(new MouseEvent("contextmenu", { bubbles: true, cancelable: true }));
+  });
+
+  const deleteItem = container.querySelector<HTMLButtonElement>(
+    "[data-keyframe-menu-action='delete']",
+  );
+  expect(deleteItem?.getAttribute("role")).toBe("menuitem");
+  expect(deleteItem?.type).toBe("button");
+  await act(async () => deleteItem?.click());
+  expect(editSpies.removeKeyframe).toHaveBeenCalledTimes(1);
+  expect(editSpies.removeKeyframe).toHaveBeenCalledWith("clip-1", "opacity", 105);
+  expect(editSpies.moveKeyframe).not.toHaveBeenCalled();
+  expect(editSpies.setKeyframeInterpolation).not.toHaveBeenCalled();
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+
+  vi.clearAllMocks();
+  editSpies.removeKeyframe.mockRejectedValueOnce(new Error("locked"));
+  await act(async () => {
+    diamond.dispatchEvent(new KeyboardEvent("keydown", { key: "ContextMenu", bubbles: true }));
+  });
+  const retryDelete = container.querySelector<HTMLButtonElement>(
+    "[data-keyframe-menu-action='delete']",
+  )!;
+  await act(async () => {
+    retryDelete.click();
+    await Promise.resolve();
+  });
+  expect(editSpies.removeKeyframe).toHaveBeenCalledTimes(1);
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+  expect(useEditorUiStore.getState().toast?.message).toBe(
+    "inspector.keyframes.deleteFailed:locked",
+  );
+});
+
+async function exerciseInterpolation(
+  interpolation: "linear" | "hold" | "smooth",
+): Promise<void> {
+  await renderOpacityKeyframe();
+  const diamond = container.querySelector<HTMLElement>("[data-keyframe-diamond='105']")!;
+  diamond.focus();
+  await act(async () => {
+    diamond.dispatchEvent(new KeyboardEvent("keydown", { key: "ContextMenu", bubbles: true }));
+  });
+  const item = container.querySelector<HTMLButtonElement>(
+    `[data-keyframe-menu-action='${interpolation}']`,
+  )!;
+  expect(item.getAttribute("role")).toBe("menuitem");
+  await act(async () => item.click());
+  expect(editSpies.setKeyframeInterpolation).toHaveBeenCalledTimes(1);
+  expect(editSpies.setKeyframeInterpolation).toHaveBeenCalledWith(
+    "clip-1",
+    "opacity",
+    105,
+    interpolation,
+  );
+  expect(editSpies.moveKeyframe).not.toHaveBeenCalled();
+  expect(editSpies.removeKeyframe).not.toHaveBeenCalled();
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+
+  vi.clearAllMocks();
+  editSpies.setKeyframeInterpolation.mockRejectedValueOnce(new Error("locked"));
+  await act(async () => {
+    diamond.dispatchEvent(new KeyboardEvent("keydown", { key: "ContextMenu", bubbles: true }));
+  });
+  const rejectedItem = container.querySelector<HTMLButtonElement>(
+    `[data-keyframe-menu-action='${interpolation}']`,
+  )!;
+  await act(async () => {
+    rejectedItem.click();
+    await Promise.resolve();
+  });
+  expect(editSpies.setKeyframeInterpolation).toHaveBeenCalledTimes(1);
+  expect(container.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(diamond);
+  expect(useEditorUiStore.getState().toast?.message).toBe(
+    "inspector.keyframes.interpolationFailed:locked",
+  );
+}
+
+it("control-3b4230aba22c9422 linear keyframe interpolation", async () => {
+  await exerciseInterpolation("linear");
+});
+
+it("control-16737eebbe9cb784 hold keyframe interpolation", async () => {
+  await exerciseInterpolation("hold");
+});
+
+it("control-ab879256f29c4e0a smooth keyframe interpolation", async () => {
+  await exerciseInterpolation("smooth");
+});
diff --git a/web/src/components/inspector/KeyframesLaneRow.tsx b/web/src/components/inspector/KeyframesLaneRow.tsx
index ce6f1e6b..12796fe4 100644
--- a/web/src/components/inspector/KeyframesLaneRow.tsx
+++ b/web/src/components/inspector/KeyframesLaneRow.tsx
@@ -26,6 +26,7 @@ import { useState, useRef, useCallback, useEffect } from "react";
 import { useEditorUiStore } from "../../store/uiStore";
 import * as edit from "../../store/editActions";
 import { snapFrame } from "../../lib/keyframeSnap";
+import { LAYOUT } from "../../lib/theme";
 import type {
   AnimPair,
   Clip,
@@ -36,9 +37,9 @@ import type {
 } from "../../lib/types";
 import type { TFunction } from "../../i18n";
 
-const DIAMOND_SIZE = 8;
+const DIAMOND_SIZE = LAYOUT.keyframeDiamondSize;
 const SNAP_FRAMES = 5;
-const LANE_HEIGHT = 24;
+const LANE_HEIGHT = LAYOUT.keyframeRowHeight;
 
 /** Union of all concrete keyframe-track value types (mirror of Clip's *Track
  *  fields). Used so `getTrack` can return a single typed union. */
@@ -93,8 +94,10 @@ export function KeyframesLaneRow({
 }) {
   const activeFrame = useEditorUiStore((s) => s.activeFrame);
   const setActiveFrame = useEditorUiStore((s) => s.setActiveFrame);
+  const pushToast = useEditorUiStore((s) => s.pushToast);
   const track = getTrack(clip, property);
   const trackRef = useRef<HTMLDivElement>(null);
+  const menuTriggerRef = useRef<HTMLElement | null>(null);
   const [dragging, setDragging] = useState<{ fromFrame: number; currentFrame: number } | null>(null);
   const [menu, setMenu] = useState<{ x: number; y: number; frame: number } | null>(null);
   /** Holds the cleanup function for the active drag's window listeners.
@@ -152,6 +155,30 @@ export function KeyframesLaneRow({
     setActiveFrame(startFrame + rel);
   };
 
+  const handleTrackKeyDown = (e: React.KeyboardEvent<HTMLDivElement>) => {
+    const endFrame = startFrame + duration;
+    const currentFrame = Math.max(startFrame, Math.min(endFrame, activeFrame));
+    let nextFrame: number | null = null;
+    if (e.key === "ArrowLeft" || e.key === "ArrowDown") nextFrame = currentFrame - 1;
+    if (e.key === "ArrowRight" || e.key === "ArrowUp") nextFrame = currentFrame + 1;
+    if (e.key === "Home") nextFrame = startFrame;
+    if (e.key === "End") nextFrame = endFrame;
+    if (nextFrame === null) return;
+    e.preventDefault();
+    setActiveFrame(Math.max(startFrame, Math.min(endFrame, nextFrame)));
+  };
+
+  const commitKeyframeMove = useCallback(
+    (fromFrame: number, toFrame: number) => {
+      if (fromFrame === toFrame) return;
+      void edit.moveKeyframe(clip.id, property, fromFrame, toFrame).catch((error: unknown) => {
+        const message = error instanceof Error ? error.message : String(error);
+        pushToast(t("inspector.keyframes.moveFailed", { error: message }));
+      });
+    },
+    [clip.id, property, pushToast, t],
+  );
+
   // Start a keyframe drag. Uses window listeners so the drag continues even
   // when the cursor leaves the track (matches the app's existing drag pattern).
   // The cleanup ref ensures listeners are removed if the component unmounts
@@ -189,7 +216,7 @@ export function KeyframesLaneRow({
       onSnapChange?.(null);
       setDragging((d) => {
         if (d && d.fromFrame !== d.currentFrame) {
-          void edit.moveKeyframe(clip.id, property, d.fromFrame, d.currentFrame);
+          commitKeyframeMove(d.fromFrame, d.currentFrame);
         }
         return null;
       });
@@ -205,18 +232,47 @@ export function KeyframesLaneRow({
   const handleDiamondContextMenu = (e: React.MouseEvent<HTMLDivElement>, absFrame: number) => {
     e.preventDefault();
     e.stopPropagation();
+    menuTriggerRef.current = e.currentTarget;
     setMenu({ x: e.clientX, y: e.clientY, frame: absFrame });
   };
 
-  const closeMenu = () => setMenu(null);
+  const handleDiamondKeyDown = (e: React.KeyboardEvent<HTMLDivElement>, absFrame: number) => {
+    const lastFrame = startFrame + duration - 1;
+    if (["ArrowLeft", "ArrowDown", "ArrowRight", "ArrowUp"].includes(e.key)) {
+      e.preventDefault();
+      e.stopPropagation();
+      const delta = e.key === "ArrowLeft" || e.key === "ArrowDown" ? -1 : 1;
+      commitKeyframeMove(absFrame, Math.max(startFrame, Math.min(lastFrame, absFrame + delta)));
+      return;
+    }
+    if (e.key === "Enter" || e.key === " " || e.key === "ContextMenu") {
+      e.preventDefault();
+      e.stopPropagation();
+      const rect = e.currentTarget.getBoundingClientRect();
+      menuTriggerRef.current = e.currentTarget;
+      setMenu({ x: rect.left + rect.width / 2, y: rect.bottom, frame: absFrame });
+    }
+  };
+
+  const closeMenu = () => {
+    const trigger = menuTriggerRef.current;
+    setMenu(null);
+    trigger?.focus();
+  };
 
   const handleDelete = (frame: number) => {
-    void edit.removeKeyframe(clip.id, property, frame);
+    void edit.removeKeyframe(clip.id, property, frame).catch((error: unknown) => {
+      const message = error instanceof Error ? error.message : String(error);
+      pushToast(t("inspector.keyframes.deleteFailed", { error: message }));
+    });
     closeMenu();
   };
 
   const handleSetInterpolation = (frame: number, interp: Interpolation) => {
-    void edit.setKeyframeInterpolation(clip.id, property, frame, interp);
+    void edit.setKeyframeInterpolation(clip.id, property, frame, interp).catch((error: unknown) => {
+      const message = error instanceof Error ? error.message : String(error);
+      pushToast(t("inspector.keyframes.interpolationFailed", { error: message }));
+    });
     closeMenu();
   };
 
@@ -278,7 +334,16 @@ export function KeyframesLaneRow({
       {/* Keyframe track strip */}
       <div
         ref={trackRef}
+        data-keyframe-lane={property}
+        role="slider"
+        tabIndex={0}
+        aria-label={propertyLabel}
+        aria-orientation="horizontal"
+        aria-valuemin={startFrame}
+        aria-valuemax={startFrame + duration}
+        aria-valuenow={Math.max(startFrame, Math.min(startFrame + duration, activeFrame))}
         onClick={handleTrackClick}
+        onKeyDown={handleTrackKeyDown}
         onContextMenu={(e) => e.preventDefault()}
         style={{
           position: "relative",
@@ -292,8 +357,16 @@ export function KeyframesLaneRow({
         {displayKeyframes.map((kf) => (
           <div
             key={kf.key}
+            data-keyframe-diamond={kf.key}
+            role="button"
+            tabIndex={0}
+            aria-label={t("inspector.keyframes.diamondLabel", {
+              property: propertyLabel,
+              frame: kf.key,
+            })}
             onMouseDown={(e) => handleDiamondMouseDown(e, kf.key)}
             onContextMenu={(e) => handleDiamondContextMenu(e, kf.key)}
+            onKeyDown={(e) => handleDiamondKeyDown(e, kf.key)}
             style={{
               position: "absolute",
               left: `${frameToRatio(kf.frame) * 100}%`,
@@ -359,9 +432,14 @@ function KeyframeContextMenu({
   onSetInterpolation: (interp: Interpolation) => void;
   onClose: () => void;
 }) {
+  const menuRef = useRef<HTMLDivElement>(null);
+  useEffect(() => menuRef.current?.focus(), []);
+
   return (
     <>
       <div
+        data-keyframe-menu-backdrop
+        aria-hidden="true"
         style={{ position: "fixed", inset: 0, zIndex: 1000 }}
         onClick={onClose}
         onContextMenu={(e) => {
@@ -370,6 +448,17 @@ function KeyframeContextMenu({
         }}
       />
       <div
+        ref={menuRef}
+        data-keyframe-context-menu
+        role="menu"
+        tabIndex={-1}
+        aria-label={t("inspector.keyframes.contextMenu")}
+        onKeyDown={(e) => {
+          if (e.key !== "Escape") return;
+          e.preventDefault();
+          e.stopPropagation();
+          onClose();
+        }}
         style={{
           position: "fixed",
           left: x,
@@ -383,7 +472,7 @@ function KeyframeContextMenu({
           boxShadow: "0 4px 12px rgba(0,0,0,0.3)",
         }}
       >
-        <MenuItem onClick={onDelete} label={t("inspector.keyframes.delete")} />
+        <MenuItem action="delete" onClick={onDelete} label={t("inspector.keyframes.delete")} />
         <div style={{ height: 1, background: "var(--border-primary)", margin: "2px 0" }} />
         <div
           style={{
@@ -396,14 +485,17 @@ function KeyframeContextMenu({
           {t("inspector.keyframes.interpolation")}
         </div>
         <MenuItem
+          action="linear"
           onClick={() => onSetInterpolation("linear")}
           label={t("inspector.keyframes.interpolation.linear")}
         />
         <MenuItem
+          action="hold"
           onClick={() => onSetInterpolation("hold")}
           label={t("inspector.keyframes.interpolation.hold")}
         />
         <MenuItem
+          action="smooth"
           onClick={() => onSetInterpolation("smooth")}
           label={t("inspector.keyframes.interpolation.smooth")}
         />
@@ -412,21 +504,35 @@ function KeyframeContextMenu({
   );
 }
 
-function MenuItem({ onClick, label }: { onClick: () => void; label: string }) {
+function MenuItem({
+  action,
+  onClick,
+  label,
+}: {
+  action: string;
+  onClick: () => void;
+  label: string;
+}) {
   return (
-    <div
+    <button
+      type="button"
+      role="menuitem"
+      data-keyframe-menu-action={action}
       onClick={onClick}
       style={{
+        display: "block",
+        width: "100%",
         padding: "4px 12px",
         fontSize: "var(--fs-xs)",
         color: "var(--text-primary)",
         cursor: "pointer",
+        textAlign: "left",
       }}
       onMouseEnter={(e) => (e.currentTarget.style.background = "var(--bg-prominent)")}
       onMouseLeave={(e) => (e.currentTarget.style.background = "transparent")}
     >
       {label}
-    </div>
+    </button>
   );
 }
 
diff --git a/web/src/components/inspector/KeyframesRuler.tsx b/web/src/components/inspector/KeyframesRuler.tsx
index d86f5151..57c11814 100644
--- a/web/src/components/inspector/KeyframesRuler.tsx
+++ b/web/src/components/inspector/KeyframesRuler.tsx
@@ -19,8 +19,9 @@
 import { useLayoutEffect, useRef, useState } from "react";
 import { chooseTicks } from "../../lib/ruler";
 import { formatTimecode } from "../../lib/geometry";
+import { LAYOUT } from "../../lib/theme";
 
-const RULER_HEIGHT = 18; // upstream KeyframesMetrics.rulerHeight (KeyframesLane.swift:5)
+const RULER_HEIGHT = LAYOUT.keyframeRulerHeight;
 
 export function KeyframesRuler({ duration, fps }: { duration: number; fps: number }) {
   const ref = useRef<HTMLDivElement>(null);
diff --git a/web/src/components/inspector/MattingSection.test.tsx b/web/src/components/inspector/MattingSection.test.tsx
new file mode 100644
index 00000000..68ec1c4b
--- /dev/null
+++ b/web/src/components/inspector/MattingSection.test.tsx
@@ -0,0 +1,174 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { Clip, GenerateMatteResult, MattingModelStatus } from "../../lib/types";
+import { MattingSection, type MattingDependencies } from "./MattingSection";
+
+function clip(overrides: Partial<Clip> = {}): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "media-1",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 0,
+    durationFrames: 2,
+    trimStartFrame: 0,
+    trimEndFrame: 2,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    ...overrides,
+  };
+}
+
+const installed: MattingModelStatus = {
+  installed: true,
+  model: "rvm-mobilenetv3-fp32-v1.0.0",
+  bytes: 14_975_696,
+  sha256: "88d4",
+};
+
+function result(applied: boolean): GenerateMatteResult {
+  return {
+    result: {
+      clipId: "clip-1",
+      sourceMediaRef: "media-1",
+      assetId: applied ? "matte-1" : null,
+      applied,
+      cacheKey: "cache",
+      previewPath: "/tmp/cache/matte.mov",
+      frameCount: 2,
+      width: 64,
+      height: 64,
+      fps: 5,
+      model: installed.model,
+      modelSha256: installed.sha256,
+      sourceSha256: "source",
+      startFrame: 0,
+      endFrame: 2,
+    },
+    actionName: applied ? "Edit Motion Graphic" : null,
+  };
+}
+
+describe("MattingSection", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("previews_then_applies_and_undoes_the_same_cached_matte", async () => {
+    const generate = vi
+      .fn()
+      .mockResolvedValueOnce(result(false))
+      .mockResolvedValueOnce(result(true));
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const dependencies: MattingDependencies = {
+      status: vi.fn().mockResolvedValue(installed),
+      install: vi.fn(),
+      cancelInstall: vi.fn(),
+      onProgress: vi.fn().mockResolvedValue(() => undefined),
+      generate,
+      cancelWorkflow: vi.fn(),
+      undo,
+    };
+    await act(async () => root.render(<MattingSection clip={clip()} dependencies={dependencies} />));
+
+    const button = (text: string) =>
+      Array.from(container.querySelectorAll("button")).find((candidate) =>
+        candidate.textContent?.includes(text),
+      )!;
+    await act(async () => button("Generate matte preview").click());
+    expect(generate).toHaveBeenNthCalledWith(1, "clip-1", false);
+    expect(button("Apply to clip").disabled).toBe(false);
+
+    await act(async () => button("Apply to clip").click());
+    expect(generate).toHaveBeenNthCalledWith(2, "clip-1", true);
+    expect(container.textContent).toContain("original media remains");
+
+    await act(async () => button("Undo matte").click());
+    expect(undo).toHaveBeenCalledOnce();
+    expect(container.textContent).toContain("Generate matte preview");
+  });
+
+  it("installs_with_progress_and_exposes_cancellation", async () => {
+    let progress: ((value: { fraction: number; downloadedBytes: number; totalBytes: number }) => void) | undefined;
+    let resolveInstall: ((status: MattingModelStatus) => void) | undefined;
+    const install = vi.fn(
+      () =>
+        new Promise<MattingModelStatus>((resolve) => {
+          resolveInstall = resolve;
+        }),
+    );
+    const cancelInstall = vi.fn().mockResolvedValue(true);
+    const dependencies: MattingDependencies = {
+      status: vi.fn().mockResolvedValue({ ...installed, installed: false }),
+      install,
+      cancelInstall,
+      onProgress: vi.fn(async (handler) => {
+        progress = handler;
+        return () => undefined;
+      }),
+      generate: vi.fn(),
+      cancelWorkflow: vi.fn(),
+      undo: vi.fn(),
+    };
+    await act(async () => root.render(<MattingSection clip={clip()} dependencies={dependencies} />));
+    const button = (text: string) =>
+      Array.from(container.querySelectorAll("button")).find((candidate) =>
+        candidate.textContent?.includes(text),
+      )!;
+    await act(async () => button("Install local model").click());
+    await act(async () => progress?.({ fraction: 0.5, downloadedBytes: 7, totalBytes: 14 }));
+    expect(container.textContent).toContain("50%");
+    await act(async () => button("Cancel").click());
+    expect(cancelInstall).toHaveBeenCalledOnce();
+    await act(async () => resolveInstall?.(installed));
+  });
+
+  it("refuses_reversed_or_retimed_clips_before_invoking_the_backend", async () => {
+    const generate = vi.fn();
+    const dependencies: MattingDependencies = {
+      status: vi.fn().mockResolvedValue(installed),
+      install: vi.fn(),
+      cancelInstall: vi.fn(),
+      onProgress: vi.fn().mockResolvedValue(() => undefined),
+      generate,
+      cancelWorkflow: vi.fn(),
+      undo: vi.fn(),
+    };
+    await act(async () =>
+      root.render(<MattingSection clip={clip({ reversed: true })} dependencies={dependencies} />),
+    );
+    expect(container.textContent).toContain("ordinary forward 1x video clips");
+    expect(container.textContent).not.toContain("Generate matte preview");
+    expect(generate).not.toHaveBeenCalled();
+  });
+});
diff --git a/web/src/components/inspector/MattingSection.tsx b/web/src/components/inspector/MattingSection.tsx
new file mode 100644
index 00000000..fd71efb5
--- /dev/null
+++ b/web/src/components/inspector/MattingSection.tsx
@@ -0,0 +1,289 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { Download, RotateCcw, Sparkles, Square } from "lucide-react";
+import { assetUrl } from "../../lib/asset";
+import * as api from "../../lib/api";
+import type { Clip, GenerateMatteResult, MattingModelStatus } from "../../lib/types";
+import { useT } from "../../i18n";
+import * as edit from "../../store/editActions";
+import { Icon } from "../ui/Icon";
+
+type Phase = "loading" | "idle" | "installing" | "previewing" | "review" | "applying" | "applied";
+
+export interface MattingDependencies {
+  status: () => Promise<MattingModelStatus>;
+  install: () => Promise<MattingModelStatus>;
+  cancelInstall: () => Promise<boolean>;
+  onProgress: (
+    handler: (progress: { fraction: number; downloadedBytes: number; totalBytes: number }) => void,
+  ) => Promise<() => void>;
+  generate: (clipId: string, apply: boolean) => Promise<GenerateMatteResult>;
+  cancelWorkflow: () => Promise<boolean>;
+  undo: () => Promise<unknown>;
+}
+
+const defaultDependencies: MattingDependencies = {
+  status: api.mattingModelStatus,
+  install: api.downloadMattingModel,
+  cancelInstall: api.cancelMattingModelDownload,
+  onProgress: api.onMattingProgress,
+  generate: (clipId, apply) => api.generateMatte(clipId, apply),
+  cancelWorkflow: api.cancelAdvancedWorkflow,
+  undo: edit.undo,
+};
+
+export function MattingSection({
+  clip,
+  dependencies = defaultDependencies,
+}: {
+  clip: Clip;
+  dependencies?: MattingDependencies;
+}) {
+  const t = useT();
+  const [model, setModel] = useState<MattingModelStatus | null>(null);
+  const [phase, setPhase] = useState<Phase>("loading");
+  const [progress, setProgress] = useState(0);
+  const [preview, setPreview] = useState<GenerateMatteResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const generationRef = useRef(0);
+  const installRef = useRef(0);
+  const compatible =
+    clip.mediaType === "video" &&
+    !clip.nestedSequenceId &&
+    !clip.reversed &&
+    Math.abs(clip.speed - 1) <= Number.EPSILON;
+  const previewUrl = useMemo(
+    () => assetUrl(preview?.result.previewPath),
+    [preview?.result.previewPath],
+  );
+
+  useEffect(() => {
+    let active = true;
+    let unlisten: (() => void) | undefined;
+    void dependencies
+      .onProgress((event) => active && setProgress(event.fraction))
+      .then((dispose) => {
+        if (active) unlisten = dispose;
+        else dispose();
+      });
+    void dependencies.status().then(
+      (status) => {
+        if (!active) return;
+        setModel(status);
+        setPhase("idle");
+      },
+      (reason) => {
+        if (!active) return;
+        setError(message(reason));
+        setPhase("idle");
+      },
+    );
+    return () => {
+      active = false;
+      generationRef.current += 1;
+      installRef.current += 1;
+      unlisten?.();
+    };
+  }, [dependencies]);
+
+  useEffect(() => {
+    generationRef.current += 1;
+    setPreview(null);
+    setError(null);
+    setPhase((current) => (current === "loading" || current === "installing" ? current : "idle"));
+  }, [clip.id]);
+
+  async function install() {
+    if (phase !== "idle") return;
+    const operation = installRef.current + 1;
+    installRef.current = operation;
+    setPhase("installing");
+    setProgress(0);
+    setError(null);
+    try {
+      const installed = await dependencies.install();
+      if (installRef.current !== operation) return;
+      setModel(installed);
+      setProgress(1);
+      setPhase("idle");
+    } catch (reason) {
+      if (installRef.current !== operation) return;
+      setError(message(reason));
+      setPhase("idle");
+    }
+  }
+
+  async function run(apply: boolean) {
+    if (!compatible || !model?.installed) return;
+    const generation = generationRef.current + 1;
+    generationRef.current = generation;
+    setPhase(apply ? "applying" : "previewing");
+    setError(null);
+    try {
+      const result = await dependencies.generate(clip.id, apply);
+      if (generationRef.current !== generation) return;
+      setPreview(result);
+      setPhase(apply ? "applied" : "review");
+    } catch (reason) {
+      if (generationRef.current !== generation) return;
+      setError(message(reason));
+      setPhase(preview ? "review" : "idle");
+    }
+  }
+
+  async function cancel() {
+    if (phase === "installing") {
+      installRef.current += 1;
+      await dependencies.cancelInstall();
+    } else {
+      generationRef.current += 1;
+      await dependencies.cancelWorkflow();
+    }
+    setPhase(preview ? "review" : "idle");
+  }
+
+  async function undo() {
+    if (phase !== "applied") return;
+    setPhase("applying");
+    try {
+      await dependencies.undo();
+      setPhase("review");
+    } catch (reason) {
+      setError(message(reason));
+      setPhase("applied");
+    }
+  }
+
+  return (
+    <section data-testid="matting-section" style={{ display: "flex", flexDirection: "column", gap: "var(--space-sm)" }}>
+      <div style={{ display: "flex", alignItems: "center", gap: "var(--space-xs)", fontSize: "var(--fs-xxs)", fontWeight: "var(--fw-semibold)", color: "var(--text-muted)", textTransform: "uppercase", letterSpacing: "var(--tracking-wide)" }}>
+        <Icon icon={Sparkles} size={11} />
+        {t("inspector.matting.heading")}
+      </div>
+
+      {!compatible && (
+        <div role="status" style={hintStyle}>{t("inspector.matting.compatibility")}</div>
+      )}
+      {compatible && model && !model.installed && (
+        <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
+          <div style={hintStyle}>
+            {t("inspector.matting.modelNeeded", { size: formatBytes(model.bytes) })}
+          </div>
+          <button type="button" disabled={phase !== "idle"} onClick={() => void install()} style={primaryButtonStyle}>
+            <Icon icon={Download} size={12} />
+            {phase === "installing"
+              ? t("inspector.matting.installing", { percent: Math.round(progress * 100) })
+              : t("inspector.matting.install")}
+          </button>
+        </div>
+      )}
+      {phase === "installing" && (
+        <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>
+          <Icon icon={Square} size={11} />
+          {t("inspector.matting.cancel")}
+        </button>
+      )}
+
+      {compatible && model?.installed && (
+        <>
+          <div style={hintStyle}>{t("inspector.matting.localPrivacy")}</div>
+          <div style={{ display: "flex", flexWrap: "wrap", gap: "var(--space-xs)" }}>
+            {phase === "applied" ? (
+              <button type="button" onClick={() => void undo()} style={secondaryButtonStyle}>
+                <Icon icon={RotateCcw} size={12} />
+                {t("inspector.matting.undo")}
+              </button>
+            ) : (
+              <>
+                <button
+                  type="button"
+                  disabled={phase === "previewing" || phase === "applying"}
+                  onClick={() => void run(false)}
+                  style={secondaryButtonStyle}
+                >
+                  <Icon icon={Sparkles} size={12} />
+                  {phase === "previewing" ? t("inspector.matting.processing") : t("inspector.matting.preview")}
+                </button>
+                <button
+                  type="button"
+                  disabled={!preview || phase === "previewing" || phase === "applying"}
+                  onClick={() => void run(true)}
+                  style={primaryButtonStyle}
+                >
+                  <Icon icon={Sparkles} size={12} />
+                  {phase === "applying" ? t("inspector.matting.applying") : t("inspector.matting.apply")}
+                </button>
+              </>
+            )}
+            {(phase === "previewing" || phase === "applying") && (
+              <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>
+                <Icon icon={Square} size={11} />
+                {t("inspector.matting.cancel")}
+              </button>
+            )}
+          </div>
+        </>
+      )}
+
+      {previewUrl && phase !== "applied" && (
+        <div
+          style={{
+            overflow: "hidden",
+            borderRadius: "var(--radius-sm)",
+            border: "var(--bw-thin) solid var(--border-primary)",
+            background:
+              "conic-gradient(var(--bg-prominent) 25%, var(--bg-raised) 0 50%, var(--bg-prominent) 0 75%, var(--bg-raised) 0) 0 0 / 12px 12px",
+          }}
+        >
+          <video
+            key={previewUrl}
+            src={previewUrl}
+            controls
+            playsInline
+            aria-label={t("inspector.matting.previewLabel")}
+            style={{ display: "block", width: "100%", maxHeight: 180, objectFit: "contain" }}
+          />
+        </div>
+      )}
+      {phase === "applied" && <div role="status" style={{ ...hintStyle, color: "var(--status-success)" }}>{t("inspector.matting.applied")}</div>}
+      {error && <div role="alert" style={{ ...hintStyle, color: "var(--status-error)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function message(reason: unknown): string {
+  return reason instanceof Error ? reason.message : String(reason);
+}
+
+function formatBytes(bytes: number): string {
+  return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+}
+
+const hintStyle = { color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+
+const primaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  justifyContent: "center",
+  gap: 4,
+  minHeight: 24,
+  padding: "2px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  background: "var(--ai-gradient)",
+  color: "#111",
+  fontSize: "var(--fs-xs)",
+  fontWeight: "var(--fw-semibold)",
+} as const;
+
+const secondaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  justifyContent: "center",
+  gap: 4,
+  minHeight: 24,
+  padding: "2px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  border: "var(--bw-thin) solid var(--border-primary)",
+  background: "var(--bg-prominent)",
+  color: "var(--text-primary)",
+  fontSize: "var(--fs-xs)",
+} as const;
diff --git a/web/src/components/inspector/MotionTrackingSection.test.tsx b/web/src/components/inspector/MotionTrackingSection.test.tsx
new file mode 100644
index 00000000..6d082a11
--- /dev/null
+++ b/web/src/components/inspector/MotionTrackingSection.test.tsx
@@ -0,0 +1,119 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { Clip, MotionTrackingResult } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+import {
+  MotionTrackingSection,
+  type MotionTrackingDependencies,
+} from "./MotionTrackingSection";
+
+function clip(overrides: Partial<Clip> = {}): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "video-1",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 10,
+    durationFrames: 30,
+    trimStartFrame: 0,
+    trimEndFrame: 0,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: { centerX: 0.5, centerY: 0.5, width: 1, height: 1, rotation: 0, flipHorizontal: false, flipVertical: false },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    ...overrides,
+  };
+}
+
+function result(applied: boolean): MotionTrackingResult {
+  return {
+    result: {
+      clipId: "clip-1",
+      applied,
+      algorithm: "opentake.region-block-match",
+      algorithmVersion: 1,
+      minimumConfidence: 0.91,
+      region: { x: 0.25, y: 0.25, width: 0.5, height: 0.5 },
+      keyframes: [
+        { frame: 0, position: { x: 0.5, y: 0.5 }, interpolation: "linear" },
+        { frame: 29, position: { x: 0.6, y: 0.55 }, interpolation: "linear" },
+      ],
+    },
+    actionName: applied ? "Set Keyframes" : null,
+  };
+}
+
+describe("MotionTrackingSection", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    useEditorUiStore.setState({
+      motionTrackingSelection: null,
+      selectedClipIds: new Set(["clip-1"]),
+    });
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("selects_a_preview_region_then_previews_applies_and_undoes", async () => {
+    const generate = vi.fn().mockResolvedValueOnce(result(false)).mockResolvedValueOnce(result(true));
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const dependencies: MotionTrackingDependencies = { generate, cancel: vi.fn(), undo };
+    await act(async () => root.render(<MotionTrackingSection clip={clip()} dependencies={dependencies} />));
+    const button = (text: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(text))!;
+
+    await act(async () => button("Select region in preview").click());
+    expect(useEditorUiStore.getState().motionTrackingSelection).toEqual({
+      clipId: "clip-1",
+      region: { x: 0.25, y: 0.25, width: 0.5, height: 0.5 },
+    });
+    await act(async () => button("Analyze motion").click());
+    expect(generate).toHaveBeenNthCalledWith(
+      1,
+      "clip-1",
+      { x: 0.25, y: 0.25, width: 0.5, height: 0.5 },
+      { startFrame: 10, endFrame: 40 },
+      false,
+    );
+    expect(container.textContent).toContain("91%");
+    expect(container.textContent).toContain("2 keyframes");
+    await act(async () => button("Apply tracking").click());
+    expect(generate).toHaveBeenNthCalledWith(2, "clip-1", expect.any(Object), expect.any(Object), true);
+    await act(async () => button("Undo tracking").click());
+    expect(undo).toHaveBeenCalledOnce();
+  });
+
+  it("cancels_pending_tracking_and_rejects_incompatible_clips", async () => {
+    let resolve: ((value: MotionTrackingResult) => void) | undefined;
+    const generate = vi.fn(() => new Promise<MotionTrackingResult>((done) => { resolve = done; }));
+    const cancel = vi.fn().mockResolvedValue(true);
+    const dependencies: MotionTrackingDependencies = { generate, cancel, undo: vi.fn() };
+    await act(async () => root.render(<MotionTrackingSection clip={clip()} dependencies={dependencies} />));
+    const button = (text: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(text))!;
+    await act(async () => button("Analyze motion").click());
+    await act(async () => button("Cancel").click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => resolve?.(result(false)));
+    expect(container.textContent).not.toContain("91%");
+
+    await act(async () => root.render(<MotionTrackingSection clip={clip({ reversed: true })} dependencies={dependencies} />));
+    expect(container.textContent).toContain("ordinary forward 1x video clips");
+  });
+});
diff --git a/web/src/components/inspector/MotionTrackingSection.tsx b/web/src/components/inspector/MotionTrackingSection.tsx
new file mode 100644
index 00000000..93e11bd5
--- /dev/null
+++ b/web/src/components/inspector/MotionTrackingSection.tsx
@@ -0,0 +1,247 @@
+import { useEffect, useRef, useState } from "react";
+import { Focus, RotateCcw, Square } from "lucide-react";
+import { useT } from "../../i18n";
+import * as api from "../../lib/api";
+import type { Clip, MotionTrackingRegion, MotionTrackingResult } from "../../lib/types";
+import * as edit from "../../store/editActions";
+import { useEditorUiStore } from "../../store/uiStore";
+import { Icon } from "../ui/Icon";
+
+type Phase = "idle" | "previewing" | "review" | "applying" | "applied";
+
+const DEFAULT_REGION: MotionTrackingRegion = { x: 0.25, y: 0.25, width: 0.5, height: 0.5 };
+
+export interface MotionTrackingDependencies {
+  generate: (
+    clipId: string,
+    region: MotionTrackingRegion,
+    range: { startFrame: number; endFrame: number },
+    apply: boolean,
+  ) => Promise<MotionTrackingResult>;
+  cancel: () => Promise<boolean>;
+  undo: () => Promise<unknown>;
+}
+
+const defaultDependencies: MotionTrackingDependencies = {
+  generate: api.trackMotion,
+  cancel: api.cancelAdvancedWorkflow,
+  undo: edit.undo,
+};
+
+export function MotionTrackingSection({ clip, dependencies = defaultDependencies }: {
+  clip: Clip;
+  dependencies?: MotionTrackingDependencies;
+}) {
+  const t = useT();
+  const clipEnd = clip.startFrame + clip.durationFrames;
+  const selection = useEditorUiStore((state) => state.motionTrackingSelection);
+  const setSelection = useEditorUiStore((state) => state.setMotionTrackingSelection);
+  const [region, setRegion] = useState<MotionTrackingRegion>(DEFAULT_REGION);
+  const [startFrame, setStartFrame] = useState(clip.startFrame);
+  const [endFrame, setEndFrame] = useState(clipEnd);
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [preview, setPreview] = useState<MotionTrackingResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const operationRef = useRef(0);
+  const compatible =
+    clip.mediaType === "video" &&
+    !clip.nestedSequenceId &&
+    !clip.reversed &&
+    Math.abs(clip.speed - 1) <= Number.EPSILON;
+  const selecting = selection?.clipId === clip.id;
+
+  useEffect(() => {
+    operationRef.current += 1;
+    setRegion(DEFAULT_REGION);
+    setStartFrame(clip.startFrame);
+    setEndFrame(clip.startFrame + clip.durationFrames);
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+  }, [clip.id, clip.startFrame, clip.durationFrames]);
+
+  useEffect(() => {
+    if (!selecting || !selection) return;
+    setRegion(selection.region);
+    operationRef.current += 1;
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+  }, [selecting, selection]);
+
+  useEffect(
+    () => () => {
+      const active = useEditorUiStore.getState().motionTrackingSelection;
+      if (active?.clipId === clip.id) setSelection(null);
+    },
+    [clip.id, setSelection],
+  );
+
+  function invalidatePreview() {
+    operationRef.current += 1;
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+  }
+
+  function updateRegion(next: MotionTrackingRegion) {
+    const clamped = normalizeRegion(next);
+    setRegion(clamped);
+    if (selecting) setSelection({ clipId: clip.id, region: clamped });
+    invalidatePreview();
+  }
+
+  function updateStartFrame(value: number) {
+    setStartFrame(value);
+    invalidatePreview();
+  }
+
+  function updateEndFrame(value: number) {
+    setEndFrame(value);
+    invalidatePreview();
+  }
+
+  async function run(apply: boolean) {
+    if (!compatible || startFrame >= endFrame) return;
+    const operation = operationRef.current + 1;
+    operationRef.current = operation;
+    setPhase(apply ? "applying" : "previewing");
+    setError(null);
+    try {
+      const result = await dependencies.generate(
+        clip.id,
+        region,
+        { startFrame, endFrame },
+        apply,
+      );
+      if (operationRef.current !== operation) return;
+      setPreview(result);
+      setPhase(apply ? "applied" : "review");
+      if (apply) setSelection(null);
+    } catch (reason) {
+      if (operationRef.current !== operation) return;
+      setError(message(reason));
+      setPhase(preview ? "review" : "idle");
+    }
+  }
+
+  async function cancel() {
+    operationRef.current += 1;
+    await dependencies.cancel();
+    setPhase(preview ? "review" : "idle");
+  }
+
+  async function undo() {
+    setPhase("applying");
+    try {
+      await dependencies.undo();
+      setPhase("review");
+    } catch (reason) {
+      setError(message(reason));
+      setPhase("applied");
+    }
+  }
+
+  const busy = phase === "previewing" || phase === "applying";
+  return (
+    <section data-testid="motion-tracking-section" style={{ display: "flex", flexDirection: "column", gap: "var(--space-sm)" }}>
+      <div style={headingStyle}><Icon icon={Focus} size={11} />{t("inspector.motionTracking.heading")}</div>
+      {!compatible && <div role="status" style={hintStyle}>{t("inspector.motionTracking.compatibility")}</div>}
+      {compatible && (
+        <>
+          <div style={hintStyle}>{t("inspector.motionTracking.localPrivacy")}</div>
+          <button
+            type="button"
+            disabled={busy || phase === "applied"}
+            aria-pressed={selecting}
+            onClick={() => setSelection(selecting ? null : { clipId: clip.id, region })}
+            style={secondaryButtonStyle}
+          >
+            <Icon icon={Focus} size={12} />
+            {selecting ? t("inspector.motionTracking.finishRegion") : t("inspector.motionTracking.selectRegion")}
+          </button>
+          <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: "var(--space-xs)" }}>
+            <PercentField label={t("inspector.motionTracking.x")} value={region.x} disabled={busy || phase === "applied"} onChange={(x) => updateRegion({ ...region, x })} />
+            <PercentField label={t("inspector.motionTracking.y")} value={region.y} disabled={busy || phase === "applied"} onChange={(y) => updateRegion({ ...region, y })} />
+            <PercentField label={t("inspector.motionTracking.width")} value={region.width} disabled={busy || phase === "applied"} onChange={(width) => updateRegion({ ...region, width })} />
+            <PercentField label={t("inspector.motionTracking.height")} value={region.height} disabled={busy || phase === "applied"} onChange={(height) => updateRegion({ ...region, height })} />
+            <FrameField label={t("inspector.motionTracking.startFrame")} value={startFrame} min={clip.startFrame} max={Math.max(clip.startFrame, endFrame - 2)} disabled={busy || phase === "applied"} onChange={updateStartFrame} />
+            <FrameField label={t("inspector.motionTracking.endFrame")} value={endFrame} min={Math.min(clipEnd, startFrame + 2)} max={clipEnd} disabled={busy || phase === "applied"} onChange={updateEndFrame} />
+          </div>
+          <div style={{ display: "flex", flexWrap: "wrap", gap: "var(--space-xs)" }}>
+            {phase === "applied" ? (
+              <button type="button" onClick={() => void undo()} style={secondaryButtonStyle}><Icon icon={RotateCcw} size={12} />{t("inspector.motionTracking.undo")}</button>
+            ) : (
+              <>
+                <button type="button" disabled={busy} onClick={() => void run(false)} style={secondaryButtonStyle}><Icon icon={Focus} size={12} />{phase === "previewing" ? t("inspector.motionTracking.processing") : error ? t("inspector.motionTracking.retry") : t("inspector.motionTracking.preview")}</button>
+                <button type="button" disabled={!preview || busy} onClick={() => void run(true)} style={primaryButtonStyle}><Icon icon={Focus} size={12} />{phase === "applying" ? t("inspector.motionTracking.applying") : t("inspector.motionTracking.apply")}</button>
+              </>
+            )}
+            {busy && <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}><Icon icon={Square} size={11} />{t("inspector.motionTracking.cancel")}</button>}
+          </div>
+        </>
+      )}
+      {preview && (
+        <div role="status" style={{ ...hintStyle, color: "var(--status-success)" }}>
+          {t("inspector.motionTracking.result", {
+            confidence: Math.round(preview.result.minimumConfidence * 100),
+            count: preview.result.keyframes.length,
+          })}
+        </div>
+      )}
+      {phase === "applied" && <div role="status" style={{ ...hintStyle, color: "var(--status-success)" }}>{t("inspector.motionTracking.applied")}</div>}
+      {error && <div role="alert" style={{ ...hintStyle, color: "var(--status-error)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function normalizeRegion(region: MotionTrackingRegion): MotionTrackingRegion {
+  const width = Math.max(0.02, Math.min(1, region.width));
+  const height = Math.max(0.02, Math.min(1, region.height));
+  return {
+    x: Math.max(0, Math.min(1 - width, region.x)),
+    y: Math.max(0, Math.min(1 - height, region.y)),
+    width,
+    height,
+  };
+}
+
+function PercentField({ label, value, disabled, onChange }: {
+  label: string;
+  value: number;
+  disabled: boolean;
+  onChange: (value: number) => void;
+}) {
+  return <FrameField label={label} value={Math.round(value * 100)} min={0} max={100} disabled={disabled} onChange={(next) => onChange(next / 100)} suffix="%" />;
+}
+
+function FrameField({ label, value, min, max, disabled, onChange, suffix }: {
+  label: string;
+  value: number;
+  min: number;
+  max: number;
+  disabled: boolean;
+  onChange: (value: number) => void;
+  suffix?: string;
+}) {
+  return (
+    <label style={fieldLabelStyle}>
+      {label}
+      <span style={{ display: "flex", alignItems: "center", gap: 3 }}>
+        <input type="number" value={value} min={min} max={max} disabled={disabled} onChange={(event) => onChange(Number(event.currentTarget.value))} style={inputStyle} />
+        {suffix && <span>{suffix}</span>}
+      </span>
+    </label>
+  );
+}
+
+function message(reason: unknown): string {
+  return reason instanceof Error ? reason.message : String(reason);
+}
+
+const headingStyle = { display: "flex", alignItems: "center", gap: "var(--space-xs)", fontSize: "var(--fs-xxs)", fontWeight: "var(--fw-semibold)", color: "var(--text-muted)", textTransform: "uppercase", letterSpacing: "var(--tracking-wide)" } as const;
+const hintStyle = { color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const fieldLabelStyle = { display: "flex", flexDirection: "column", gap: 2, color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const inputStyle = { width: "100%", minWidth: 0, padding: "3px var(--space-xs)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-primary)", fontSize: "var(--fs-xs)" } as const;
+const primaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", background: "var(--ai-gradient)", color: "#111", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" } as const;
+const secondaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
diff --git a/web/src/components/inspector/ObjectRemovalSection.test.tsx b/web/src/components/inspector/ObjectRemovalSection.test.tsx
new file mode 100644
index 00000000..d3b361c9
--- /dev/null
+++ b/web/src/components/inspector/ObjectRemovalSection.test.tsx
@@ -0,0 +1,217 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { Clip, RemoveObjectResult } from "../../lib/types";
+import {
+  ObjectRemovalSection,
+  type ObjectRemovalDependencies,
+} from "./ObjectRemovalSection";
+
+function clip(overrides: Partial<Clip> = {}): Clip {
+  return {
+    id: "clip-1",
+    mediaRef: "media-1",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 10,
+    durationFrames: 20,
+    trimStartFrame: 0,
+    trimEndFrame: 20,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    masks: [
+      {
+        shape: {
+          kind: "circle",
+          center: { x: 0.5, y: 0.5 },
+          radius: { x: 0.2, y: 0.2 },
+        },
+        feather: 0.01,
+        invert: false,
+      },
+    ],
+    ...overrides,
+  };
+}
+
+function result(applied: boolean): RemoveObjectResult {
+  return {
+    result: {
+      clipId: "clip-1",
+      sourceMediaRef: "media-1",
+      assetId: applied ? "removed-1" : null,
+      applied,
+      cacheKey: "cache",
+      previewPath: "/tmp/cache/removed.mov",
+      frameCount: 20,
+      width: 64,
+      height: 48,
+      fps: 10,
+      provider: "opentake-local",
+      model: "opentake-boundary-fill-v1",
+      sourceSha256: "source",
+      maskIndex: 0,
+      startFrame: 10,
+      endFrame: 30,
+    },
+    actionName: applied ? "Remove Masked Object" : null,
+  };
+}
+
+describe("ObjectRemovalSection", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("retries_then_applies_and_undoes_the_reviewed_derivative", async () => {
+    const generate = vi
+      .fn()
+      .mockRejectedValueOnce(new Error("fixture failure"))
+      .mockResolvedValueOnce(result(false))
+      .mockResolvedValueOnce(result(true));
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const dependencies: ObjectRemovalDependencies = {
+      generate,
+      cancel: vi.fn(),
+      undo,
+    };
+    await act(async () =>
+      root.render(<ObjectRemovalSection clip={clip()} dependencies={dependencies} />),
+    );
+    const button = (text: string) =>
+      Array.from(container.querySelectorAll("button")).find((candidate) =>
+        candidate.textContent?.includes(text),
+      )!;
+
+    await act(async () => button("Generate removal preview").click());
+    expect(container.textContent).toContain("fixture failure");
+    await act(async () => button("Retry removal preview").click());
+    expect(generate).toHaveBeenNthCalledWith(2, "clip-1", false, {
+      startFrame: 10,
+      endFrame: 30,
+    });
+    expect(button("Apply to clip").disabled).toBe(false);
+
+    await act(async () => button("Apply to clip").click());
+    expect(generate).toHaveBeenNthCalledWith(3, "clip-1", true, {
+      startFrame: 10,
+      endFrame: 30,
+    });
+    expect(container.textContent).toContain("undo restores");
+    await act(async () => button("Undo object removal").click());
+    expect(undo).toHaveBeenCalledOnce();
+    expect(container.textContent).toContain("Generate removal preview");
+  });
+
+  it("exposes_cancellation_without_accepting_a_stale_completion", async () => {
+    let resolve: ((value: RemoveObjectResult) => void) | undefined;
+    const generate = vi.fn(
+      () => new Promise<RemoveObjectResult>((done) => { resolve = done; }),
+    );
+    const cancel = vi.fn().mockResolvedValue(true);
+    const dependencies: ObjectRemovalDependencies = {
+      generate,
+      cancel,
+      undo: vi.fn(),
+    };
+    await act(async () =>
+      root.render(<ObjectRemovalSection clip={clip()} dependencies={dependencies} />),
+    );
+    const button = (text: string) =>
+      Array.from(container.querySelectorAll("button")).find((candidate) =>
+        candidate.textContent?.includes(text),
+      )!;
+    await act(async () => button("Generate removal preview").click());
+    await act(async () => button("Cancel").click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => resolve?.(result(false)));
+    expect(container.querySelector("video")).toBeNull();
+  });
+
+  it("keeps_the_undo_surface_when_apply_clears_the_baked_mask_before_returning", async () => {
+    let resolveApply: ((value: RemoveObjectResult) => void) | undefined;
+    const generate = vi
+      .fn()
+      .mockResolvedValueOnce(result(false))
+      .mockImplementationOnce(
+        () => new Promise<RemoveObjectResult>((done) => { resolveApply = done; }),
+      );
+    const dependencies: ObjectRemovalDependencies = {
+      generate,
+      cancel: vi.fn(),
+      undo: vi.fn(),
+    };
+    await act(async () =>
+      root.render(<ObjectRemovalSection clip={clip()} dependencies={dependencies} />),
+    );
+    const button = (text: string) =>
+      Array.from(container.querySelectorAll("button")).find((candidate) =>
+        candidate.textContent?.includes(text),
+      )!;
+    await act(async () => button("Generate removal preview").click());
+    await act(async () => button("Apply to clip").click());
+    await act(async () =>
+      root.render(
+        <ObjectRemovalSection
+          clip={clip({ mediaRef: "removed-1", masks: [] })}
+          dependencies={dependencies}
+        />,
+      ),
+    );
+    await act(async () => resolveApply?.(result(true)));
+    expect(button("Undo object removal")).toBeDefined();
+  });
+
+  it("requires_an_editable_mask_and_refuses_incompatible_clips", async () => {
+    const generate = vi.fn();
+    const dependencies: ObjectRemovalDependencies = {
+      generate,
+      cancel: vi.fn(),
+      undo: vi.fn(),
+    };
+    await act(async () =>
+      root.render(
+        <ObjectRemovalSection clip={clip({ masks: [] })} dependencies={dependencies} />,
+      ),
+    );
+    expect(container.textContent).toContain("Enable and adjust a mask");
+    expect(container.textContent).not.toContain("Generate removal preview");
+
+    await act(async () =>
+      root.render(
+        <ObjectRemovalSection clip={clip({ reversed: true })} dependencies={dependencies} />,
+      ),
+    );
+    expect(container.textContent).toContain("ordinary forward 1x video clips");
+    expect(generate).not.toHaveBeenCalled();
+  });
+});
diff --git a/web/src/components/inspector/ObjectRemovalSection.tsx b/web/src/components/inspector/ObjectRemovalSection.tsx
new file mode 100644
index 00000000..173a373b
--- /dev/null
+++ b/web/src/components/inspector/ObjectRemovalSection.tsx
@@ -0,0 +1,228 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { Eraser, RotateCcw, Square } from "lucide-react";
+import { assetUrl } from "../../lib/asset";
+import * as api from "../../lib/api";
+import type { Clip, RemoveObjectResult } from "../../lib/types";
+import { useT } from "../../i18n";
+import * as edit from "../../store/editActions";
+import { Icon } from "../ui/Icon";
+
+type Phase = "idle" | "previewing" | "review" | "applying" | "applied";
+
+export interface ObjectRemovalDependencies {
+  generate: (
+    clipId: string,
+    apply: boolean,
+    range: { startFrame: number; endFrame: number },
+  ) => Promise<RemoveObjectResult>;
+  cancel: () => Promise<boolean>;
+  undo: () => Promise<unknown>;
+}
+
+const defaultDependencies: ObjectRemovalDependencies = {
+  generate: api.removeObject,
+  cancel: api.cancelAdvancedWorkflow,
+  undo: edit.undo,
+};
+
+export function ObjectRemovalSection({
+  clip,
+  dependencies = defaultDependencies,
+}: {
+  clip: Clip;
+  dependencies?: ObjectRemovalDependencies;
+}) {
+  const t = useT();
+  const clipEnd = clip.startFrame + clip.durationFrames;
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [startFrame, setStartFrame] = useState(clip.startFrame);
+  const [endFrame, setEndFrame] = useState(clipEnd);
+  const [preview, setPreview] = useState<RemoveObjectResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const operationRef = useRef(0);
+  const compatible =
+    clip.mediaType === "video" &&
+    !clip.nestedSequenceId &&
+    !clip.reversed &&
+    Math.abs(clip.speed - 1) <= Number.EPSILON;
+  const hasMask = (clip.masks?.length ?? 0) > 0;
+  const previewUrl = useMemo(
+    () => assetUrl(preview?.result.previewPath),
+    [preview?.result.previewPath],
+  );
+  const maskFingerprint = JSON.stringify(clip.masks?.[0] ?? null);
+
+  useEffect(() => {
+    operationRef.current += 1;
+    setStartFrame(clip.startFrame);
+    setEndFrame(clip.startFrame + clip.durationFrames);
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+  }, [clip.id, clip.startFrame, clip.durationFrames]);
+
+  useEffect(() => {
+    if (phase === "applying" || phase === "applied") return;
+    operationRef.current += 1;
+    setPreview(null);
+    setError(null);
+    setPhase("idle");
+    // A mask edit invalidates the reviewed derivative. Apply must always use a
+    // cache generated from the currently visible mask.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [maskFingerprint]);
+
+  async function run(apply: boolean) {
+    if (!compatible || !hasMask || startFrame >= endFrame) return;
+    const operation = operationRef.current + 1;
+    operationRef.current = operation;
+    setPhase(apply ? "applying" : "previewing");
+    setError(null);
+    try {
+      const result = await dependencies.generate(clip.id, apply, { startFrame, endFrame });
+      if (operationRef.current !== operation) return;
+      setPreview(result);
+      setPhase(apply ? "applied" : "review");
+    } catch (reason) {
+      if (operationRef.current !== operation) return;
+      setError(message(reason));
+      setPhase(preview ? "review" : "idle");
+    }
+  }
+
+  async function cancel() {
+    operationRef.current += 1;
+    await dependencies.cancel();
+    setPhase(preview ? "review" : "idle");
+  }
+
+  async function undo() {
+    if (phase !== "applied") return;
+    setPhase("applying");
+    try {
+      await dependencies.undo();
+      setPhase("review");
+    } catch (reason) {
+      setError(message(reason));
+      setPhase("applied");
+    }
+  }
+
+  const busy = phase === "previewing" || phase === "applying";
+  return (
+    <section
+      data-testid="object-removal-section"
+      style={{ display: "flex", flexDirection: "column", gap: "var(--space-sm)" }}
+    >
+      <div style={headingStyle}>
+        <Icon icon={Eraser} size={11} />
+        {t("inspector.objectRemoval.heading")}
+      </div>
+      {!compatible && <div role="status" style={hintStyle}>{t("inspector.objectRemoval.compatibility")}</div>}
+      {compatible && !hasMask && phase !== "applied" && (
+        <div role="status" style={hintStyle}>{t("inspector.objectRemoval.maskNeeded")}</div>
+      )}
+      {compatible && (hasMask || phase === "applied") && (
+        <>
+          <div style={hintStyle}>{t("inspector.objectRemoval.localPrivacy")}</div>
+          {phase !== "applied" && (
+            <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: "var(--space-xs)" }}>
+              <FrameField
+                label={t("inspector.objectRemoval.startFrame")}
+                value={startFrame}
+                min={clip.startFrame}
+                max={Math.max(clip.startFrame, endFrame - 1)}
+                disabled={busy}
+                onChange={setStartFrame}
+              />
+              <FrameField
+                label={t("inspector.objectRemoval.endFrame")}
+                value={endFrame}
+                min={Math.min(clipEnd, startFrame + 1)}
+                max={clipEnd}
+                disabled={busy}
+                onChange={setEndFrame}
+              />
+            </div>
+          )}
+          <div style={{ display: "flex", flexWrap: "wrap", gap: "var(--space-xs)" }}>
+            {phase === "applied" ? (
+              <button type="button" onClick={() => void undo()} style={secondaryButtonStyle}>
+                <Icon icon={RotateCcw} size={12} />
+                {t("inspector.objectRemoval.undo")}
+              </button>
+            ) : (
+              <>
+                <button type="button" disabled={busy} onClick={() => void run(false)} style={secondaryButtonStyle}>
+                  <Icon icon={Eraser} size={12} />
+                  {phase === "previewing"
+                    ? t("inspector.objectRemoval.processing")
+                    : error
+                      ? t("inspector.objectRemoval.retry")
+                      : t("inspector.objectRemoval.preview")}
+                </button>
+                <button type="button" disabled={!preview || busy} onClick={() => void run(true)} style={primaryButtonStyle}>
+                  <Icon icon={Eraser} size={12} />
+                  {phase === "applying" ? t("inspector.objectRemoval.applying") : t("inspector.objectRemoval.apply")}
+                </button>
+              </>
+            )}
+            {busy && (
+              <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>
+                <Icon icon={Square} size={11} />
+                {t("inspector.objectRemoval.cancel")}
+              </button>
+            )}
+          </div>
+        </>
+      )}
+      {previewUrl && phase !== "applied" && (
+        <video
+          key={previewUrl}
+          src={previewUrl}
+          controls
+          playsInline
+          aria-label={t("inspector.objectRemoval.previewLabel")}
+          style={previewStyle}
+        />
+      )}
+      {phase === "applied" && <div role="status" style={{ ...hintStyle, color: "var(--status-success)" }}>{t("inspector.objectRemoval.applied")}</div>}
+      {error && <div role="alert" style={{ ...hintStyle, color: "var(--status-error)" }}>{error}</div>}
+    </section>
+  );
+}
+
+function FrameField({ label, value, min, max, disabled, onChange }: {
+  label: string;
+  value: number;
+  min: number;
+  max: number;
+  disabled: boolean;
+  onChange: (value: number) => void;
+}) {
+  return (
+    <label style={{ display: "flex", flexDirection: "column", gap: 2, color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+      {label}
+      <input
+        type="number"
+        value={value}
+        min={min}
+        max={max}
+        disabled={disabled}
+        onChange={(event) => onChange(Number(event.currentTarget.value))}
+        style={inputStyle}
+      />
+    </label>
+  );
+}
+
+function message(reason: unknown): string {
+  return reason instanceof Error ? reason.message : String(reason);
+}
+
+const headingStyle = { display: "flex", alignItems: "center", gap: "var(--space-xs)", fontSize: "var(--fs-xxs)", fontWeight: "var(--fw-semibold)", color: "var(--text-muted)", textTransform: "uppercase", letterSpacing: "var(--tracking-wide)" } as const;
+const hintStyle = { color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const inputStyle = { minWidth: 0, padding: "3px var(--space-xs)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-primary)", fontSize: "var(--fs-xs)" } as const;
+const primaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", background: "var(--ai-gradient)", color: "#111", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" } as const;
+const secondaryButtonStyle = { display: "inline-flex", alignItems: "center", justifyContent: "center", gap: 4, minHeight: 24, padding: "2px var(--space-sm)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
+const previewStyle = { display: "block", width: "100%", maxHeight: 180, objectFit: "contain", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-prominent)" } as const;
diff --git a/web/src/components/inspector/ScrubbableNumberField.interaction.test.tsx b/web/src/components/inspector/ScrubbableNumberField.interaction.test.tsx
new file mode 100644
index 00000000..e37e183c
--- /dev/null
+++ b/web/src/components/inspector/ScrubbableNumberField.interaction.test.tsx
@@ -0,0 +1,175 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { ScrubbableNumberField } from "./ScrubbableNumberField";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let container: HTMLDivElement;
+let root: Root;
+let onChange: ReturnType<typeof vi.fn>;
+let onCommit: ReturnType<typeof vi.fn>;
+
+function renderField(): void {
+  root.render(
+    <ScrubbableNumberField
+      ariaLabel="Opacity"
+      value={5}
+      min={0}
+      max={10}
+      sensitivity={1}
+      format={(value) => value.toFixed(1)}
+      suffix="%"
+      onChange={onChange}
+      onCommit={onCommit}
+    />,
+  );
+}
+
+async function enterTextMode(): Promise<HTMLInputElement> {
+  const display = container.querySelector<HTMLElement>("[role='spinbutton']")!;
+  await act(async () => {
+    display.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 1,
+      clientX: 10,
+    }));
+    display.dispatchEvent(new PointerEvent("pointerup", {
+      bubbles: true,
+      pointerId: 1,
+      clientX: 10,
+    }));
+  });
+  return container.querySelector<HTMLInputElement>("input[aria-label='Opacity']")!;
+}
+
+async function setInput(input: HTMLInputElement, value: string): Promise<void> {
+  await act(async () => {
+    Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set?.call(input, value);
+    input.dispatchEvent(new InputEvent("input", { bubbles: true }));
+  });
+}
+
+beforeEach(() => {
+  onChange = vi.fn();
+  onCommit = vi.fn();
+  vi.spyOn(HTMLElement.prototype, "setPointerCapture").mockImplementation(() => {});
+  vi.spyOn(HTMLElement.prototype, "releasePointerCapture").mockImplementation(() => {});
+  vi.stubGlobal("requestAnimationFrame", (callback: FrameRequestCallback) => {
+    callback(0);
+    return 1;
+  });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  act(() => renderField());
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  vi.restoreAllMocks();
+  vi.unstubAllGlobals();
+});
+
+it("control-481c7d66573516a6 numeric text-entry mode", async () => {
+  let input = await enterTextMode();
+  expect(document.activeElement).toBe(input);
+  await setInput(input, "12,5%");
+  await act(async () => {
+    input.dispatchEvent(new KeyboardEvent("keydown", { key: "Enter", bubbles: true }));
+  });
+  expect(onCommit).toHaveBeenCalledTimes(1);
+  expect(onCommit).toHaveBeenCalledWith(10);
+  expect(container.querySelector("input")).toBeNull();
+  expect(document.activeElement).toBe(container.querySelector("[role='spinbutton']"));
+
+  onCommit.mockClear();
+  input = await enterTextMode();
+  await setInput(input, "not-a-number");
+  await act(async () => input.dispatchEvent(new FocusEvent("focusout", { bubbles: true })));
+  expect(onCommit).not.toHaveBeenCalled();
+  expect(container.querySelector("input")).toBeNull();
+
+  input = await enterTextMode();
+  await setInput(input, "7");
+  await act(async () => {
+    input.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }));
+  });
+  expect(onCommit).not.toHaveBeenCalled();
+  expect(document.activeElement).toBe(container.querySelector("[role='spinbutton']"));
+});
+
+it("control-3e4fc80f4dde046e pointer-scrubbable numeric value", async () => {
+  const display = container.querySelector<HTMLElement>("[role='spinbutton']")!;
+  await act(async () => {
+    display.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 2,
+      clientX: 10,
+    }));
+    display.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 2,
+      clientX: 14,
+    }));
+    display.dispatchEvent(new PointerEvent("pointerup", {
+      bubbles: true,
+      pointerId: 2,
+      clientX: 14,
+    }));
+  });
+  expect(onChange).toHaveBeenCalledWith(9);
+  expect(onCommit).toHaveBeenCalledTimes(1);
+  expect(onCommit).toHaveBeenCalledWith(9);
+
+  onChange.mockClear();
+  onCommit.mockClear();
+  await act(async () => {
+    display.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 10,
+    }));
+    display.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 14,
+      shiftKey: true,
+    }));
+    display.dispatchEvent(new PointerEvent("pointercancel", {
+      bubbles: true,
+      pointerId: 3,
+    }));
+    display.dispatchEvent(new PointerEvent("pointerup", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 14,
+    }));
+  });
+  expect(onChange).toHaveBeenCalledWith(10);
+  expect(onCommit).not.toHaveBeenCalled();
+  expect(container.querySelector("input")).toBeNull();
+
+  onChange.mockClear();
+  await act(async () => {
+    display.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 4,
+      clientX: 10,
+    }));
+    display.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 4,
+      clientX: 20,
+      metaKey: true,
+    }));
+    display.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }));
+  });
+  expect(onChange).toHaveBeenCalledWith(6);
+  expect(onCommit).not.toHaveBeenCalled();
+  expect(document.activeElement).toBe(display);
+});
diff --git a/web/src/components/inspector/ScrubbableNumberField.tsx b/web/src/components/inspector/ScrubbableNumberField.tsx
index be7b67da..c900bb65 100644
--- a/web/src/components/inspector/ScrubbableNumberField.tsx
+++ b/web/src/components/inspector/ScrubbableNumberField.tsx
@@ -5,10 +5,12 @@
  * commit, Esc cancel). `mixed` shows an em dash.
  */
 
-import { useCallback, useRef, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { LAYOUT } from "../../lib/theme";
 
 interface Props {
+  ariaLabel?: string;
+  disabled?: boolean;
   value: number;
   mixed?: boolean;
   min: number;
@@ -28,9 +30,29 @@ interface Props {
 export function ScrubbableNumberField(p: Props) {
   const [editing, setEditing] = useState(false);
   const [draft, setDraft] = useState("");
-  const dragRef = useRef<{ startX: number; startValue: number; moved: boolean } | null>(null);
+  const dragRef = useRef<{
+    startX: number;
+    startValue: number;
+    moved: boolean;
+    pointerId: number;
+    captureTarget: HTMLElement;
+  } | null>(null);
   const provisionalRef = useRef<number | null>(null);
   const inputRef = useRef<HTMLInputElement>(null);
+  const displayRef = useRef<HTMLSpanElement>(null);
+  const restoreDisplayFocusRef = useRef(false);
+
+  useEffect(() => {
+    if (editing) {
+      inputRef.current?.focus();
+      inputRef.current?.select();
+      return;
+    }
+    if (restoreDisplayFocusRef.current) {
+      restoreDisplayFocusRef.current = false;
+      displayRef.current?.focus();
+    }
+  }, [editing]);
 
   const clamp = (v: number) => Math.max(p.min, Math.min(p.max, v));
 
@@ -43,12 +65,21 @@ export function ScrubbableNumberField(p: Props) {
 
   const onPointerDown = useCallback(
     (e: React.PointerEvent) => {
+      if (p.disabled) return;
       e.preventDefault();
-      dragRef.current = { startX: e.clientX, startValue: p.value, moved: false };
+      const captureTarget = e.currentTarget as HTMLElement;
+      captureTarget.focus();
+      dragRef.current = {
+        startX: e.clientX,
+        startValue: p.value,
+        moved: false,
+        pointerId: e.pointerId,
+        captureTarget,
+      };
       provisionalRef.current = null;
-      (e.target as HTMLElement).setPointerCapture(e.pointerId);
+      captureTarget.setPointerCapture(e.pointerId);
     },
-    [p.value],
+    [p.disabled, p.value],
   );
 
   const onPointerMove = useCallback(
@@ -70,42 +101,70 @@ export function ScrubbableNumberField(p: Props) {
   );
 
   const onPointerUp = useCallback(
-    (e: React.PointerEvent) => {
+    (_e: React.PointerEvent) => {
       const d = dragRef.current;
       dragRef.current = null;
-      (e.target as HTMLElement).releasePointerCapture(e.pointerId);
       if (!d) return;
+      try {
+        d.captureTarget.releasePointerCapture(d.pointerId);
+      } catch {
+        // Capture may already be gone when the browser ends the gesture.
+      }
       if (d.moved && provisionalRef.current !== null) {
         p.onCommit(provisionalRef.current);
         provisionalRef.current = null;
       } else {
         setDraft(p.format(p.value));
         setEditing(true);
-        requestAnimationFrame(() => inputRef.current?.select());
       }
     },
     // eslint-disable-next-line react-hooks/exhaustive-deps
     [p],
   );
 
-  const commitEdit = useCallback(() => {
+  const cancelPointer = useCallback(() => {
+    const d = dragRef.current;
+    dragRef.current = null;
+    provisionalRef.current = null;
+    if (!d) return;
+    try {
+      d.captureTarget.releasePointerCapture(d.pointerId);
+    } catch {
+      // `lostpointercapture` means there is no capture left to release.
+    }
+    d.captureTarget.focus();
+  }, []);
+
+  const finishEditing = useCallback((restoreFocus: boolean) => {
+    restoreDisplayFocusRef.current = restoreFocus;
+    setEditing(false);
+  }, []);
+
+  const commitEdit = useCallback((restoreFocus: boolean) => {
     const cleaned = draft.replace(p.suffix ?? "", "").replace(",", ".").trim();
     const parsed = Number(cleaned);
     if (Number.isFinite(parsed)) p.onCommit(clamp(parsed));
-    setEditing(false);
+    finishEditing(restoreFocus);
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [draft, p]);
+  }, [draft, p, finishEditing]);
+
+  const beginEditing = useCallback(() => {
+    if (p.disabled) return;
+    setDraft(p.format(p.value));
+    setEditing(true);
+  }, [p]);
 
   if (editing) {
     return (
       <input
         ref={inputRef}
+        aria-label={p.ariaLabel ?? "Value"}
         value={draft}
         onChange={(e) => setDraft(e.target.value)}
-        onBlur={commitEdit}
+        onBlur={() => commitEdit(false)}
         onKeyDown={(e) => {
-          if (e.key === "Enter") commitEdit();
-          else if (e.key === "Escape") setEditing(false);
+          if (e.key === "Enter") commitEdit(true);
+          else if (e.key === "Escape") finishEditing(true);
         }}
         className="tabular"
         style={{
@@ -124,9 +183,38 @@ export function ScrubbableNumberField(p: Props) {
 
   return (
     <span
+      ref={displayRef}
       onPointerDown={onPointerDown}
       onPointerMove={onPointerMove}
       onPointerUp={onPointerUp}
+      onPointerCancel={cancelPointer}
+      onLostPointerCapture={cancelPointer}
+      role="spinbutton"
+      aria-label={p.ariaLabel ?? "Value"}
+      aria-valuemin={p.min}
+      aria-valuemax={p.max}
+      aria-valuenow={p.mixed ? undefined : p.value}
+      aria-valuetext={text}
+      aria-disabled={p.disabled || undefined}
+      tabIndex={p.disabled ? -1 : 0}
+      data-interaction-state={p.disabled ? "disabled" : "enabled"}
+      onKeyDown={(e) => {
+        if (p.disabled) return;
+        if (e.key === "Escape" && dragRef.current) {
+          e.preventDefault();
+          cancelPointer();
+          return;
+        }
+        if (e.key === "Enter" || e.key === " ") {
+          e.preventDefault();
+          beginEditing();
+          return;
+        }
+        if (e.key !== "ArrowUp" && e.key !== "ArrowDown") return;
+        e.preventDefault();
+        const modifier = (e.shiftKey ? 10 : 1) * (e.metaKey || e.ctrlKey ? 0.1 : 1);
+        p.onCommit(clamp(p.value + (e.key === "ArrowUp" ? 1 : -1) * p.sensitivity * modifier));
+      }}
       className="tabular"
       style={{
         width: p.width ?? 56,
@@ -134,7 +222,7 @@ export function ScrubbableNumberField(p: Props) {
         textAlign: "right",
         color: p.mixed ? "var(--text-tertiary)" : "var(--accent-primary)",
         fontSize: "var(--fs-sm)",
-        cursor: "ew-resize",
+        cursor: p.disabled ? "not-allowed" : "ew-resize",
         userSelect: "none",
       }}
     >
diff --git a/web/src/components/inspector/SwapMediaSection.tsx b/web/src/components/inspector/SwapMediaSection.tsx
index 0977d1d4..c0679d59 100644
--- a/web/src/components/inspector/SwapMediaSection.tsx
+++ b/web/src/components/inspector/SwapMediaSection.tsx
@@ -24,6 +24,7 @@ import { useState } from "react";
 import { RefreshCw } from "lucide-react";
 import { Icon } from "../ui/Icon";
 import { useProjectStore } from "../../store/projectStore";
+import { useEditorUiStore } from "../../store/uiStore";
 import { useMediaStore } from "../../store/mediaStore";
 import * as edit from "../../store/editActions";
 import { type TFunction } from "../../i18n";
@@ -48,7 +49,12 @@ function mediaTypeLabel(type: MediaItem["type"]): string {
 export function SwapMediaSection({ clip, t }: { clip: Clip; t: TFunction }) {
   const [open, setOpen] = useState(false);
   const items = useMediaStore((s) => s.items);
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
 
   // "单链组" gate: hide when the clip belongs to a link group with > 1 member.
   if (clip.linkGroupId) {
diff --git a/web/src/components/media/CaptionsTab.test.tsx b/web/src/components/media/CaptionsTab.test.tsx
new file mode 100644
index 00000000..28a8f987
--- /dev/null
+++ b/web/src/components/media/CaptionsTab.test.tsx
@@ -0,0 +1,137 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import type { CaptionTranslationResult, Clip } from "../../lib/types";
+import { useI18nStore } from "../../i18n";
+import { useProjectStore } from "../../store/projectStore";
+import { useEditorUiStore } from "../../store/uiStore";
+
+const mocks = vi.hoisted(() => ({
+  translate: vi.fn(),
+  apply: vi.fn(),
+  cancel: vi.fn(),
+  undo: vi.fn(),
+}));
+
+vi.mock("../../lib/api", () => ({
+  isTauri: true,
+  applyCaptionTranslationReview: mocks.apply,
+  cancelAdvancedWorkflow: mocks.cancel,
+  downloadTranscribeModel: vi.fn(),
+  onTranscribeProgress: vi.fn(),
+  translateCaptions: mocks.translate,
+  transcribeModelStatus: vi.fn(),
+}));
+
+vi.mock("../../store/editActions", () => ({
+  generateCaptions: vi.fn(),
+  undo: mocks.undo,
+}));
+
+import { CaptionsTab } from "./CaptionsTab";
+
+function caption(id: string, text: string, startFrame: number): Clip {
+  return {
+    id,
+    mediaRef: "",
+    mediaType: "text",
+    sourceClipType: "text",
+    startFrame,
+    durationFrames: 12,
+    trimStartFrame: 0,
+    trimEndFrame: 0,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: { centerX: 0.5, centerY: 0.85, width: 1, height: 0.1, rotation: 0, flipHorizontal: false, flipVertical: false },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    captionGroupId: "group-1",
+    textContent: text,
+  };
+}
+
+function translationResult(): CaptionTranslationResult {
+  return {
+    result: {
+      projectEpoch: 7,
+      version: 9,
+      sourceLocale: "en-US",
+      targetLocale: "zh-CN",
+      provider: "openai",
+      model: "gpt-4o-mini",
+      review: [
+        { id: "cap-1", sourceText: "Hello", translatedText: "你好" },
+        { id: "cap-2", sourceText: "World", translatedText: "世界" },
+      ],
+      errors: [],
+      captionCount: 2,
+      translatedCount: 2,
+      applied: false,
+    },
+    actionName: null,
+  };
+}
+
+describe("CaptionsTab translation review", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    useProjectStore.getState().replaceProjectSnapshot({
+      projectEpoch: 7,
+      projectPath: "/tmp/Captions.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+      version: 9,
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: true,
+        tracks: [{ id: "captions", type: "video", muted: false, hidden: false, syncLocked: true, clips: [caption("cap-1", "Hello", 4), caption("cap-2", "World", 21)] }],
+      },
+    });
+    useEditorUiStore.setState({ selectedClipIds: new Set(["cap-1", "cap-2"]) });
+    mocks.translate.mockReset().mockResolvedValue(translationResult());
+    mocks.apply.mockReset().mockResolvedValue({ result: { applied: true }, actionName: "Translate Captions" });
+    mocks.cancel.mockReset().mockResolvedValue(true);
+    mocks.undo.mockReset().mockResolvedValue(undefined);
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("reviews individual changes, rejects one, applies the accepted item, and undoes", async () => {
+    await act(async () => root.render(<CaptionsTab />));
+    const consent = Array.from(container.querySelectorAll("input[type=checkbox]")).find((input) => input.parentElement?.textContent?.includes("possible API charges")) as HTMLInputElement;
+    await act(async () => consent.click());
+    const button = (label: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(label))!;
+    await act(async () => button("Translate & Review").click());
+    expect(mocks.translate).toHaveBeenCalledWith(["cap-1", "cap-2"], "auto", "zh-CN", "openai", true);
+    expect(container.textContent).toContain("你好");
+    expect(container.textContent).toContain("世界");
+
+    const reviewChecks = Array.from(container.querySelectorAll('input[aria-label^="Accept translation"]')) as HTMLInputElement[];
+    await act(async () => reviewChecks[1].click());
+    await act(async () => button("Apply 1").click());
+    expect(mocks.apply).toHaveBeenCalledWith(
+      translationResult().result,
+      [{ id: "cap-1", sourceText: "Hello", translatedText: "你好" }],
+    );
+    expect(container.textContent).toContain("caption IDs and frame ranges are unchanged");
+    await act(async () => button("Undo Translation").click());
+    expect(mocks.undo).toHaveBeenCalledOnce();
+  });
+});
diff --git a/web/src/components/media/CaptionsTab.tsx b/web/src/components/media/CaptionsTab.tsx
index 8a6a31c2..96d9cbf4 100644
--- a/web/src/components/media/CaptionsTab.tsx
+++ b/web/src/components/media/CaptionsTab.tsx
@@ -23,14 +23,19 @@ import { useMediaStore } from "../../store/mediaStore";
 import { useEditorUiStore } from "../../store/uiStore";
 import { generateCaptions } from "../../store/editActions";
 import {
+  applyCaptionTranslationReview,
+  cancelAdvancedWorkflow,
   downloadTranscribeModel,
   isTauri,
   onTranscribeProgress,
+  translateCaptions,
   transcribeModelStatus,
 } from "../../lib/api";
-import { SPACE, RADIUS } from "../../lib/theme";
+import { undo as undoEdit } from "../../store/editActions";
+import { LAYOUT, SPACE, RADIUS } from "../../lib/theme";
 import type {
   CaptionCase,
+  CaptionTranslationResult,
   CaptionRequest,
   CaptionSource,
   ModelStatus,
@@ -40,13 +45,13 @@ import type {
 } from "../../lib/types";
 
 /** Caption style/placement defaults, 1:1 with upstream `AppTheme.Caption`. */
-const DEFAULT_FONT_SIZE = 48;
-const MIN_FONT_SIZE = 12;
-const MAX_FONT_SIZE = 300;
+const DEFAULT_FONT_SIZE = LAYOUT.captionDefaultFontSize;
+const MIN_FONT_SIZE = LAYOUT.captionMinFontSize;
+const MAX_FONT_SIZE = LAYOUT.captionMaxFontSize;
 const DEFAULT_CENTER_X = 0.5;
-const DEFAULT_CENTER_Y = 0.9;
+const DEFAULT_CENTER_Y = LAYOUT.captionDefaultCenterY;
 const CENTER_SNAP = 0.5;
-const CENTER_SNAP_THRESHOLD = 0.02;
+const CENTER_SNAP_THRESHOLD = LAYOUT.captionCenterSnapThreshold;
 
 const CASE_OPTIONS: ReadonlyArray<CaptionCase> = ["auto", "upper", "lower"];
 
@@ -74,7 +79,7 @@ export function CaptionsTab() {
   }, [mediaItems]);
 
   // Style (caption font size default 48, not the generic text 96).
-  const [fontSize, setFontSize] = useState(DEFAULT_FONT_SIZE);
+  const [fontSize, setFontSize] = useState<number>(DEFAULT_FONT_SIZE);
   const [color, setColor] = useState<Rgba>({ r: 1, g: 1, b: 1, a: 1 });
   const [background, setBackground] = useState<{ enabled: boolean; color: Rgba }>({
     enabled: false,
@@ -85,7 +90,7 @@ export function CaptionsTab() {
 
   // Placement (normalized canvas center; default bottom-center).
   const [centerX, setCenterX] = useState(DEFAULT_CENTER_X);
-  const [centerY, setCenterY] = useState(DEFAULT_CENTER_Y);
+  const [centerY, setCenterY] = useState<number>(DEFAULT_CENTER_Y);
 
   // Source: null = auto (or selected clips), else a specific track id.
   const [trackId, setTrackId] = useState<string | null>(null);
@@ -94,6 +99,23 @@ export function CaptionsTab() {
 
   const [phase, setPhase] = useState<Phase>({ kind: "idle" });
   const [note, setNote] = useState<string | null>(null);
+  const [translationSourceLocale, setTranslationSourceLocale] = useState("auto");
+  const [translationTargetLocale, setTranslationTargetLocale] = useState("zh-CN");
+  const [translationProvider, setTranslationProvider] = useState<"openai" | "anthropic">("openai");
+  const [translationCostAuthorized, setTranslationCostAuthorized] = useState(false);
+  const [translationPhase, setTranslationPhase] = useState<"idle" | "translating" | "review" | "applying" | "applied">("idle");
+  const [translationResult, setTranslationResult] = useState<CaptionTranslationResult | null>(null);
+  const [acceptedTranslationIds, setAcceptedTranslationIds] = useState<Set<string>>(new Set());
+  const [translationError, setTranslationError] = useState<string | null>(null);
+
+  const captionClips = useMemo(
+    () => timeline.tracks.flatMap((track) => track.clips).filter((clip) => clip.mediaType === "text" && clip.captionGroupId && clip.textContent?.trim()),
+    [timeline],
+  );
+  const selectedCaptionIds = useMemo(() => {
+    const ids = captionClips.filter((clip) => selectedClipIds.has(clip.id)).map((clip) => clip.id);
+    return ids.length > 0 ? ids : captionClips.map((clip) => clip.id);
+  }, [captionClips, selectedClipIds]);
 
   // Caption-eligible tracks (any audio track, or a video track that carries
   // audio). Mirrors upstream's track menu built from `captionTargets`.
@@ -190,6 +212,53 @@ export function CaptionsTab() {
     }
   };
 
+  const runTranslation = async () => {
+    setTranslationPhase("translating");
+    setTranslationError(null);
+    setTranslationResult(null);
+    try {
+      const result = await translateCaptions(
+        selectedCaptionIds,
+        translationSourceLocale,
+        translationTargetLocale,
+        translationProvider,
+        translationCostAuthorized,
+      );
+      setTranslationResult(result);
+      setAcceptedTranslationIds(new Set(result.result.review.map((change) => change.id)));
+      setTranslationPhase("review");
+    } catch (error) {
+      setTranslationError(error instanceof Error ? error.message : String(error));
+      setTranslationPhase("idle");
+    }
+  };
+
+  const applyTranslation = async () => {
+    if (!translationResult) return;
+    const accepted = translationResult.result.review.filter((change) => acceptedTranslationIds.has(change.id));
+    if (accepted.length === 0) return;
+    setTranslationPhase("applying");
+    setTranslationError(null);
+    try {
+      await applyCaptionTranslationReview(translationResult.result, accepted);
+      setTranslationPhase("applied");
+    } catch (error) {
+      setTranslationError(error instanceof Error ? error.message : String(error));
+      setTranslationPhase("review");
+    }
+  };
+
+  const undoTranslation = async () => {
+    setTranslationPhase("applying");
+    try {
+      await undoEdit();
+      setTranslationPhase("review");
+    } catch (error) {
+      setTranslationError(error instanceof Error ? error.message : String(error));
+      setTranslationPhase("applied");
+    }
+  };
+
   return (
     <div style={{ display: "flex", flexDirection: "column", height: "100%", position: "relative" }}>
       <div style={{ flex: 1, overflowY: "auto", padding: `${SPACE.md}px ${SPACE.lgXl}px` }}>
@@ -281,6 +350,44 @@ export function CaptionsTab() {
             <PosField label="Y" value={centerY} onChange={(v) => setCenterY(snapCenter(v))} />
           </div>
         </Section>
+
+        <Section title={t("captions.translation")}>
+          <div style={{ fontSize: "var(--fs-xs)", color: "var(--text-tertiary)" }}>
+            {t("captions.translation.scope", { count: selectedCaptionIds.length })}
+          </div>
+          <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: SPACE.sm }}>
+            <input aria-label={t("captions.translation.sourceLocale")} value={translationSourceLocale} disabled={translationPhase === "translating" || translationPhase === "applying"} onChange={(event) => setTranslationSourceLocale(event.currentTarget.value)} style={inputStyle} />
+            <input aria-label={t("captions.translation.targetLocale")} value={translationTargetLocale} disabled={translationPhase === "translating" || translationPhase === "applying"} onChange={(event) => setTranslationTargetLocale(event.currentTarget.value)} style={inputStyle} />
+          </div>
+          <select aria-label={t("captions.translation.provider")} value={translationProvider} disabled={translationPhase === "translating" || translationPhase === "applying"} onChange={(event) => setTranslationProvider(event.currentTarget.value as "openai" | "anthropic")} style={selectStyle}>
+            <option value="openai">OpenAI</option>
+            <option value="anthropic">Anthropic</option>
+          </select>
+          <label style={{ display: "flex", alignItems: "center", gap: SPACE.sm, fontSize: "var(--fs-xs)", color: "var(--text-secondary)" }}>
+            <input type="checkbox" checked={translationCostAuthorized} onChange={(event) => setTranslationCostAuthorized(event.currentTarget.checked)} />
+            {t("captions.translation.costConsent")}
+          </label>
+          {translationResult?.result.review.map((change) => (
+            <label key={change.id} style={{ display: "grid", gridTemplateColumns: "auto 1fr", gap: SPACE.sm, alignItems: "start", padding: SPACE.sm, border: "var(--bw-thin) solid var(--border-subtle)", borderRadius: RADIUS.sm }}>
+              <input type="checkbox" checked={acceptedTranslationIds.has(change.id)} disabled={translationPhase === "applying" || translationPhase === "applied"} onChange={(event) => { const accepted = event.currentTarget.checked; setAcceptedTranslationIds((current) => { const next = new Set(current); if (accepted) next.add(change.id); else next.delete(change.id); return next; }); }} aria-label={t("captions.translation.accept", { text: change.translatedText })} />
+              <span style={{ display: "flex", flexDirection: "column", gap: 2, fontSize: "var(--fs-xs)" }}><span style={{ color: "var(--text-tertiary)" }}>{change.sourceText}</span><span style={{ color: "var(--text-primary)" }}>{change.translatedText}</span></span>
+            </label>
+          ))}
+          {translationResult?.result.errors.map((failure) => <div key={failure.id} role="status" style={{ fontSize: "var(--fs-xs)", color: "var(--status-error)" }}>{failure.id}: {failure.message}</div>)}
+          <div style={{ display: "flex", flexWrap: "wrap", gap: SPACE.sm }}>
+            {translationPhase === "applied" ? (
+              <button type="button" onClick={() => void undoTranslation()} style={primaryButtonStyle(false)}>{t("captions.translation.undo")}</button>
+            ) : (
+              <>
+                <button type="button" disabled={selectedCaptionIds.length === 0 || !translationTargetLocale.trim() || !translationCostAuthorized || translationPhase === "translating" || translationPhase === "applying"} onClick={() => void runTranslation()} style={primaryButtonStyle(translationPhase === "translating")}>{translationPhase === "translating" ? t("captions.translation.translating") : translationResult ? t("captions.translation.retry") : t("captions.translation.translate")}</button>
+                <button type="button" disabled={!translationResult || acceptedTranslationIds.size === 0 || translationPhase !== "review"} onClick={() => void applyTranslation()} style={primaryButtonStyle(translationPhase === "applying")}>{translationPhase === "applying" ? t("captions.translation.applying") : t("captions.translation.apply", { count: acceptedTranslationIds.size })}</button>
+              </>
+            )}
+            {translationPhase === "translating" && <button type="button" onClick={() => void cancelAdvancedWorkflow()}>{t("captions.translation.cancel")}</button>}
+          </div>
+          {translationPhase === "applied" && <div role="status" style={{ fontSize: "var(--fs-xs)", color: "var(--status-success)" }}>{t("captions.translation.applied")}</div>}
+          {translationError && <div role="alert" style={{ fontSize: "var(--fs-xs)", color: "var(--status-error)" }}>{translationError}</div>}
+        </Section>
       </div>
 
       {/* Generate bar (fixed at the bottom, like upstream). */}
diff --git a/web/src/components/media/IdentityGenerationTabs.test.tsx b/web/src/components/media/IdentityGenerationTabs.test.tsx
new file mode 100644
index 00000000..fe945b09
--- /dev/null
+++ b/web/src/components/media/IdentityGenerationTabs.test.tsx
@@ -0,0 +1,113 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { AvatarGenerationResult, MediaItem, VoiceCloneResult } from "../../lib/types";
+import { useMediaStore } from "../../store/mediaStore";
+import { useProjectStore } from "../../store/projectStore";
+import { AvatarGenerationTab, type AvatarDependencies, VoiceCloneTab, type VoiceDependencies } from "./IdentityGenerationTabs";
+
+vi.mock("../../lib/asset", () => ({ assetUrl: (path: string | null | undefined) => (path ? `asset://${path}` : null) }));
+
+function setValue(element: HTMLInputElement | HTMLTextAreaElement, value: string): void {
+  const prototype = element instanceof HTMLTextAreaElement ? HTMLTextAreaElement.prototype : HTMLInputElement.prototype;
+  Object.getOwnPropertyDescriptor(prototype, "value")?.set?.call(element, value);
+  element.dispatchEvent(new Event("input", { bubbles: true }));
+}
+
+function media(id: string, type: "image" | "audio"): MediaItem {
+  return { id, name: id, type, duration: type === "audio" ? 1 : 0, hasAudio: type === "audio", favorite: false };
+}
+
+function checkbox(container: HTMLElement, index: number): HTMLInputElement {
+  return Array.from(container.querySelectorAll<HTMLInputElement>('input[type="checkbox"]'))[index];
+}
+
+function button(container: HTMLElement, label: string): HTMLButtonElement {
+  return Array.from(container.querySelectorAll<HTMLButtonElement>("button")).find((candidate) => candidate.textContent?.includes(label))!;
+}
+
+describe("identity generation workflows", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    useMediaStore.setState({ items: [media("portrait", "image"), media("voice-ref", "audio")], folders: [], importing: false, error: null });
+    useProjectStore.setState({ timeline: { fps: 30, width: 1920, height: 1080, settingsConfigured: true, tracks: [], voiceModels: [] } });
+    container = document.createElement("div"); document.body.append(container); root = createRoot(container);
+  });
+
+  afterEach(async () => { await act(async () => root.unmount()); container.remove(); });
+
+  it("requires recorded consent and cost, imports a preview, supports undo, and isolates a cancelled stale avatar result", async () => {
+    let resolve: ((value: AvatarGenerationResult) => void) | undefined;
+    const run = vi.fn(() => new Promise<AvatarGenerationResult>((done) => { resolve = done; }));
+    const cancel = vi.fn().mockResolvedValue(true);
+    const undo = vi.fn().mockResolvedValue(undefined);
+    const dependencies: AvatarDependencies = { run, cancel, undo };
+    await act(async () => root.render(<AvatarGenerationTab dependencies={dependencies} />));
+    expect(button(container, "Generate & Import Avatar").disabled).toBe(true);
+    await act(async () => { checkbox(container, 0).click(); checkbox(container, 1).click(); });
+    await act(async () => button(container, "Generate & Import Avatar").click());
+    expect(run).toHaveBeenCalledWith(expect.objectContaining({ portraitMediaRef: "portrait", audioMediaRef: "voice-ref", costAuthorized: true, consentId: expect.stringMatching(/^consent-avatar-/) }));
+    await act(async () => button(container, "Cancel").click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => resolve?.({ result: { assetId: "avatar", clipIds: ["clip"], previewPath: "/tmp/stale.mp4", provider: "fal", model: "sync", providerRequestId: "request", requestHash: "a".repeat(64), consentId: "consent", portraitMediaRef: "portrait", audioMediaRef: "voice-ref", durationFrames: 30, mediaType: "video/mp4", imported: true }, actionName: "Generate Avatar" }));
+    expect(container.querySelector("video")).toBeNull();
+
+    run.mockResolvedValueOnce({ result: { assetId: "avatar", clipIds: ["clip"], previewPath: "/tmp/avatar.mp4", provider: "fal", model: "sync", providerRequestId: "request", requestHash: "a".repeat(64), consentId: "consent", portraitMediaRef: "portrait", audioMediaRef: "voice-ref", durationFrames: 30, mediaType: "video/mp4", imported: true }, actionName: "Generate Avatar" });
+    await act(async () => button(container, "Generate & Import Avatar").click());
+    expect(container.querySelector("video")?.getAttribute("src")).toContain("avatar.mp4");
+    expect(container.textContent).toContain("30 frames");
+    await act(async () => button(container, "Undo Avatar").click());
+    expect(undo).toHaveBeenCalledOnce();
+  });
+
+  it("opens voice cloning for legacy timelines that omit voiceModels", async () => {
+    useProjectStore.setState({
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: true,
+        tracks: [],
+      },
+    });
+    const dependencies: VoiceDependencies = {
+      run: vi.fn(),
+      cancel: vi.fn().mockResolvedValue(true),
+      undo: vi.fn().mockResolvedValue(undefined),
+    };
+
+    await act(async () => root.render(<VoiceCloneTab dependencies={dependencies} />));
+
+    expect(container.querySelector('[data-testid="voice-clone-tab"]')).not.toBeNull();
+    expect(button(container, "Enroll Voice Model").disabled).toBe(true);
+  });
+
+  it("enrolls, generates, auditions, undoes, and revokes a consented voice", async () => {
+    const run = vi.fn(async (request: Parameters<VoiceDependencies["run"]>[0]): Promise<VoiceCloneResult> => {
+      if (request.action === "enroll") return { result: { action: "enroll", voiceId: "voice-model-1", voiceName: request.voiceName, provider: "elevenlabs", model: "eleven_multilingual_v2", consentId: request.consentId }, actionName: "Enroll Voice Clone" };
+      if (request.action === "generate") return { result: { action: "generate", voiceId: request.voiceId!, assetId: "audio-out", clipIds: ["clip"], previewPath: "/tmp/voice.mp3", provider: "elevenlabs", model: "eleven_multilingual_v2", consentId: request.consentId, durationFrames: 30, imported: true }, actionName: "Generate Cloned Voice" };
+      return { result: { action: "revoke", voiceId: request.voiceId!, provider: "elevenlabs", consentId: request.consentId, revoked: true }, actionName: "Revoke Voice Clone" };
+    });
+    const dependencies: VoiceDependencies = { run, cancel: vi.fn().mockResolvedValue(true), undo: vi.fn().mockResolvedValue(undefined) };
+    await act(async () => root.render(<VoiceCloneTab dependencies={dependencies} />));
+    const name = container.querySelector<HTMLInputElement>('input[aria-label="Voice name"]')!;
+    await act(async () => { setValue(name, "Narrator"); checkbox(container, 0).click(); checkbox(container, 1).click(); });
+    await act(async () => button(container, "Enroll Voice Model").click());
+    expect(run).toHaveBeenLastCalledWith(expect.objectContaining({ action: "enroll", referenceAudioMediaRef: "voice-ref", voiceName: "Narrator", costAuthorized: true, consentId: expect.stringMatching(/^consent-voice-/) }));
+    const prompt = container.querySelector<HTMLTextAreaElement>('textarea[aria-label="Text to speak"]')!;
+    await act(async () => setValue(prompt, "Hello"));
+    await act(async () => button(container, "Generate, Audition & Import").click());
+    expect(container.querySelector("audio")?.getAttribute("src")).toContain("voice.mp3");
+    await act(async () => button(container, "Undo Generated Audio").click());
+    expect(dependencies.undo).toHaveBeenCalledOnce();
+    await act(async () => button(container, "Permanently Revoke Voice").click());
+    expect(run).toHaveBeenLastCalledWith(expect.objectContaining({ action: "revoke", voiceId: "voice-model-1" }));
+    expect(container.textContent).toContain("cannot generate again");
+  });
+});
diff --git a/web/src/components/media/IdentityGenerationTabs.tsx b/web/src/components/media/IdentityGenerationTabs.tsx
new file mode 100644
index 00000000..e7092c6d
--- /dev/null
+++ b/web/src/components/media/IdentityGenerationTabs.tsx
@@ -0,0 +1,144 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { useT } from "../../i18n";
+import * as api from "../../lib/api";
+import { assetUrl } from "../../lib/asset";
+import { RADIUS, SPACE } from "../../lib/theme";
+import type { AvatarGenerationResult, VoiceCloneResult, VoiceModelRecord } from "../../lib/types";
+import * as edit from "../../store/editActions";
+import { useMediaStore } from "../../store/mediaStore";
+import { useProjectStore } from "../../store/projectStore";
+
+type Phase = "idle" | "running" | "ready" | "applied";
+
+const EMPTY_VOICE_MODELS: readonly VoiceModelRecord[] = [];
+
+function consentId(scope: string): string {
+  const id = globalThis.crypto?.randomUUID?.() ?? `${Date.now()}-${Math.random().toString(16).slice(2)}`;
+  return `consent-${scope}-${id}`;
+}
+
+export interface AvatarDependencies {
+  run: typeof api.generateAvatar;
+  cancel: typeof api.cancelAdvancedWorkflow;
+  undo: typeof edit.undo;
+}
+
+const avatarDefaults: AvatarDependencies = { run: api.generateAvatar, cancel: api.cancelAdvancedWorkflow, undo: edit.undo };
+
+export function AvatarGenerationTab({ dependencies = avatarDefaults }: { dependencies?: AvatarDependencies }) {
+  const t = useT();
+  const items = useMediaStore((state) => state.items);
+  const portraits = useMemo(() => items.filter((item) => item.type === "image"), [items]);
+  const audio = useMemo(() => items.filter((item) => item.type === "audio" && item.hasAudio), [items]);
+  const [portraitMediaRef, setPortrait] = useState("");
+  const [audioMediaRef, setAudio] = useState("");
+  const [startFrame, setStartFrame] = useState(0);
+  const [consent, setConsent] = useState("");
+  const [costAuthorized, setCostAuthorized] = useState(false);
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [result, setResult] = useState<AvatarGenerationResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const operation = useRef(0);
+
+  useEffect(() => { if (!portraits.some((item) => item.id === portraitMediaRef)) setPortrait(portraits[0]?.id ?? ""); }, [portraits, portraitMediaRef]);
+  useEffect(() => { if (!audio.some((item) => item.id === audioMediaRef)) setAudio(audio[0]?.id ?? ""); }, [audio, audioMediaRef]);
+
+  const run = async () => {
+    const id = ++operation.current;
+    setPhase("running"); setError(null);
+    try {
+      const next = await dependencies.run({ portraitMediaRef, audioMediaRef, consentId: consent, costAuthorized, startFrame });
+      if (operation.current !== id) return;
+      setResult(next); setPhase("applied");
+    } catch (reason) {
+      if (operation.current !== id) return;
+      setError(reason instanceof Error ? reason.message : String(reason)); setPhase("idle");
+    }
+  };
+  const cancel = async () => { operation.current += 1; await dependencies.cancel(); setPhase("idle"); };
+  const undo = async () => { setPhase("running"); try { await dependencies.undo(); setResult(null); setPhase("idle"); } catch (reason) { setError(reason instanceof Error ? reason.message : String(reason)); setPhase("applied"); } };
+  const busy = phase === "running";
+  const preview = assetUrl(result?.result.previewPath);
+  return (
+    <div data-testid="avatar-generation-tab" style={rootStyle}>
+      <p style={descriptionStyle}>{t("avatar.description")}</p>
+      <label style={labelStyle}>{t("avatar.portrait")}<select aria-label={t("avatar.portrait")} value={portraitMediaRef} disabled={busy || phase === "applied"} onChange={(event) => setPortrait(event.currentTarget.value)} style={inputStyle}>{portraits.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}</select></label>
+      <label style={labelStyle}>{t("avatar.audio")}<select aria-label={t("avatar.audio")} value={audioMediaRef} disabled={busy || phase === "applied"} onChange={(event) => setAudio(event.currentTarget.value)} style={inputStyle}>{audio.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}</select></label>
+      <label style={labelStyle}>{t("avatar.startFrame")}<input aria-label={t("avatar.startFrame")} type="number" min={0} value={startFrame} disabled={busy || phase === "applied"} onChange={(event) => setStartFrame(Math.max(0, Number(event.currentTarget.value) || 0))} style={inputStyle} /></label>
+      <label style={checkStyle}><input type="checkbox" checked={Boolean(consent)} disabled={busy || phase === "applied"} onChange={(event) => setConsent(event.currentTarget.checked ? consentId("avatar") : "")} />{t("avatar.consent")}</label>
+      <label style={checkStyle}><input type="checkbox" checked={costAuthorized} disabled={busy || phase === "applied"} onChange={(event) => setCostAuthorized(event.currentTarget.checked)} />{t("avatar.cost")}</label>
+      {preview && <video controls src={preview} aria-label={t("avatar.preview")} style={{ width: "100%", maxHeight: 180, borderRadius: RADIUS.md, background: "black" }} />}
+      <div style={buttonRowStyle}>{phase === "applied" ? <button type="button" onClick={() => void undo()} style={primaryButtonStyle}>{t("avatar.undo")}</button> : <button type="button" disabled={busy || !portraitMediaRef || !audioMediaRef || !consent || !costAuthorized} onClick={() => void run()} style={primaryButtonStyle}>{busy ? t("avatar.progress") : error ? t("common.retry") : t("avatar.generate")}</button>}{busy && <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>{t("common.cancel")}</button>}</div>
+      {result && <div role="status" style={successStyle}>{t("avatar.ready", { frames: result.result.durationFrames })}</div>}
+      {error && <div role="alert" style={errorStyle}>{error}</div>}
+    </div>
+  );
+}
+
+export interface VoiceDependencies {
+  run: typeof api.cloneVoice;
+  cancel: typeof api.cancelAdvancedWorkflow;
+  undo: typeof edit.undo;
+}
+
+const voiceDefaults: VoiceDependencies = { run: api.cloneVoice, cancel: api.cancelAdvancedWorkflow, undo: edit.undo };
+
+export function VoiceCloneTab({ dependencies = voiceDefaults }: { dependencies?: VoiceDependencies }) {
+  const t = useT();
+  const items = useMediaStore((state) => state.items);
+  const storedVoiceModels = useProjectStore((state) => state.timeline.voiceModels);
+  const records = storedVoiceModels ?? EMPTY_VOICE_MODELS;
+  const references = useMemo(() => items.filter((item) => item.type === "audio" && item.hasAudio), [items]);
+  const [referenceAudioMediaRef, setReference] = useState("");
+  const [voiceName, setVoiceName] = useState("");
+  const [voiceId, setVoiceId] = useState("");
+  const [prompt, setPrompt] = useState("");
+  const [consent, setConsent] = useState("");
+  const [costAuthorized, setCostAuthorized] = useState(false);
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [result, setResult] = useState<VoiceCloneResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [locallyRevoked, setLocallyRevoked] = useState<string[]>([]);
+  const operation = useRef(0);
+  useEffect(() => { if (!references.some((item) => item.id === referenceAudioMediaRef)) setReference(references[0]?.id ?? ""); }, [references, referenceAudioMediaRef]);
+  useEffect(() => { const available = records.find((record) => !record.revoked && !locallyRevoked.includes(record.id)); if (!voiceId && available) { setVoiceId(available.id); setConsent(available.consentId); } }, [records, locallyRevoked, voiceId]);
+  const execute = async (request: Parameters<typeof api.cloneVoice>[0]) => {
+    const id = ++operation.current; setPhase("running"); setError(null);
+    try { const next = await dependencies.run(request); if (operation.current !== id) return; setResult(next); if (next.result.action === "enroll") setVoiceId(next.result.voiceId); if (next.result.action === "revoke") { setLocallyRevoked((current) => [...current, next.result.voiceId]); setVoiceId(""); } setPhase(next.result.action === "generate" ? "applied" : "ready"); }
+    catch (reason) { if (operation.current !== id) return; setError(reason instanceof Error ? reason.message : String(reason)); setPhase("idle"); }
+  };
+  const cancel = async () => { operation.current += 1; await dependencies.cancel(); setPhase("idle"); };
+  const undo = async () => { setPhase("running"); try { await dependencies.undo(); setResult(null); setPhase("ready"); } catch (reason) { setError(reason instanceof Error ? reason.message : String(reason)); setPhase("applied"); } };
+  const busy = phase === "running";
+  const activeRecord = records.find((record) => record.id === voiceId);
+  const activeConsent = activeRecord?.consentId ?? consent;
+  const preview = assetUrl(result?.result.previewPath);
+  return (
+    <div data-testid="voice-clone-tab" style={rootStyle}>
+      <p style={descriptionStyle}>{t("voice.description")}</p>
+      <label style={labelStyle}>{t("voice.reference")}<select aria-label={t("voice.reference")} value={referenceAudioMediaRef} disabled={busy} onChange={(event) => setReference(event.currentTarget.value)} style={inputStyle}>{references.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}</select></label>
+      <label style={labelStyle}>{t("voice.name")}<input aria-label={t("voice.name")} value={voiceName} disabled={busy} onChange={(event) => setVoiceName(event.currentTarget.value)} style={inputStyle} /></label>
+      <label style={checkStyle}><input type="checkbox" checked={Boolean(consent)} disabled={busy || Boolean(activeRecord)} onChange={(event) => setConsent(event.currentTarget.checked ? consentId("voice") : "")} />{t("voice.consent")}</label>
+      <label style={checkStyle}><input type="checkbox" checked={costAuthorized} disabled={busy} onChange={(event) => setCostAuthorized(event.currentTarget.checked)} />{t("voice.cost")}</label>
+      <button type="button" disabled={busy || !referenceAudioMediaRef || !voiceName.trim() || !consent || !costAuthorized} onClick={() => void execute({ action: "enroll", referenceAudioMediaRef, voiceName: voiceName.trim(), consentId: consent, costAuthorized })} style={secondaryButtonStyle}>{t("voice.enroll")}</button>
+      <label style={labelStyle}>{t("voice.model")}<select aria-label={t("voice.model")} value={voiceId} disabled={busy} onChange={(event) => { const record = records.find((item) => item.id === event.currentTarget.value); setVoiceId(event.currentTarget.value); if (record) setConsent(record.consentId); }} style={inputStyle}><option value="">{t("voice.chooseModel")}</option>{records.filter((record) => !record.revoked && !locallyRevoked.includes(record.id)).map((record) => <option key={record.id} value={record.id}>{record.voiceName}</option>)}{result?.result.action === "enroll" && !records.some((record) => record.id === result.result.voiceId) && <option value={result.result.voiceId}>{result.result.voiceName}</option>}</select></label>
+      <label style={labelStyle}>{t("voice.prompt")}<textarea aria-label={t("voice.prompt")} value={prompt} disabled={busy || phase === "applied"} onChange={(event) => setPrompt(event.currentTarget.value)} style={{ ...inputStyle, minHeight: 60 }} /></label>
+      {preview && <audio controls src={preview} aria-label={t("voice.audition")} style={{ width: "100%" }} />}
+      <div style={buttonRowStyle}>{phase === "applied" ? <button type="button" onClick={() => void undo()} style={primaryButtonStyle}>{t("voice.undo")}</button> : <button type="button" disabled={busy || !voiceId || !activeConsent || !prompt.trim() || !costAuthorized} onClick={() => void execute({ action: "generate", voiceId, prompt: prompt.trim(), consentId: activeConsent, costAuthorized })} style={primaryButtonStyle}>{busy ? t("voice.progress") : error ? t("common.retry") : t("voice.generate")}</button>}<button type="button" disabled={busy || !voiceId || !activeConsent} onClick={() => void execute({ action: "revoke", voiceId, consentId: activeConsent })} style={dangerButtonStyle}>{t("voice.revoke")}</button>{busy && <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>{t("common.cancel")}</button>}</div>
+      {result && <div role="status" style={successStyle}>{t(`voice.status.${result.result.action}`)}</div>}
+      {error && <div role="alert" style={errorStyle}>{error}</div>}
+    </div>
+  );
+}
+
+const rootStyle = { height: "100%", overflowY: "auto", padding: SPACE.mdLg, display: "flex", flexDirection: "column", gap: SPACE.md } as const;
+const descriptionStyle = { color: "var(--text-secondary)", fontSize: "var(--fs-sm)", margin: 0 } as const;
+const labelStyle = { display: "flex", flexDirection: "column", gap: 3, color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const checkStyle = { display: "flex", alignItems: "flex-start", gap: SPACE.sm, color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
+const inputStyle = { width: "100%", boxSizing: "border-box", padding: "5px var(--space-sm)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-surface)", color: "var(--text-primary)", fontSize: "var(--fs-xs)" } as const;
+const buttonRowStyle = { display: "flex", flexWrap: "wrap", gap: SPACE.sm } as const;
+const primaryButtonStyle = { minHeight: 28, padding: "4px var(--space-md)", borderRadius: "var(--radius-sm)", background: "var(--ai-gradient)", color: "#111", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" } as const;
+const secondaryButtonStyle = { minHeight: 28, padding: "4px var(--space-md)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
+const dangerButtonStyle = { ...secondaryButtonStyle, color: "var(--status-error)" } as const;
+const successStyle = { color: "var(--status-success)", fontSize: "var(--fs-xs)" } as const;
+const errorStyle = { color: "var(--status-error)", fontSize: "var(--fs-xs)" } as const;
diff --git a/web/src/components/media/MediaPanel.test.tsx b/web/src/components/media/MediaPanel.test.tsx
index fc37c3db..f65f4c22 100644
--- a/web/src/components/media/MediaPanel.test.tsx
+++ b/web/src/components/media/MediaPanel.test.tsx
@@ -20,6 +20,10 @@ vi.mock("../../lib/api", () => ({
   generateThumbnail: vi.fn().mockResolvedValue(null),
   toggleFavorite: vi.fn(),
   extractAudio: vi.fn(),
+  scriptToVideo: vi.fn(),
+  generateAvatar: vi.fn(),
+  cloneVoice: vi.fn(),
+  cancelAdvancedWorkflow: vi.fn(),
 }));
 
 vi.mock("../../lib/asset", () => ({
diff --git a/web/src/components/media/MediaPanel.tsx b/web/src/components/media/MediaPanel.tsx
index bb470839..dc53d8c8 100644
--- a/web/src/components/media/MediaPanel.tsx
+++ b/web/src/components/media/MediaPanel.tsx
@@ -1,6 +1,6 @@
 /**
  * MediaPanel (SPEC §7 + 剪映式顶栏改造)。顶部横排主标签（素材/音频/文本/贴纸/
- * 特效/转场/字幕/智能包裹，仅素材/音频可用，其余置灰占位）取代了原左侧竖排
+ * 特效/转场/字幕/智能包裹；素材/音频/音乐/字幕已接真实内容）取代了原左侧竖排
  * Media/Captions/Music 标签条。素材/音频下再分「导入 / 我的」二级标签：导入=当前
  * 项目素材（音频标签仅 type==='audio'），我的=跨项目全局收藏库。
  * 内容区仍是 actions/search/context 工具栏 + 资产网格；网格项 HTML5-draggable 到
@@ -63,7 +63,10 @@ import { saveDialog } from "../../lib/dialog";
 import type { MediaFolder, MediaItem } from "../../lib/types";
 import { MediaTabBar, MediaSubTabBar, MATERIAL_SUB_TABS, AUDIO_SUB_TABS } from "./MediaTabBar";
 import { SoundLibraryTab } from "./SoundLibraryTab";
+import { MusicTab } from "./MusicTab";
+import { TransitionTab } from "./TransitionTab";
 import { CaptionsTab } from "./CaptionsTab";
+import { SmartPackTab } from "./SmartPackTab";
 import { MediaSearchResults } from "./MediaSearch";
 import { applyFavoriteMigrationOutcome, migrateLocalFavorites } from "./favorites";
 import { LibraryEntryGrid } from "./LibraryView";
@@ -201,8 +204,14 @@ export function MediaPanel() {
       <div style={{ flex: 1, minWidth: 0, minHeight: 0, display: "flex", flexDirection: "column" }}>
         {isLibraryTab ? (
           <MediaTab kind={mediaTab as MediaTabKind} />
+        ) : mediaTab === "music" ? (
+          <MusicTab />
+        ) : mediaTab === "transition" ? (
+          <TransitionTab />
         ) : mediaTab === "subtitle" ? (
           <CaptionsTab />
+        ) : mediaTab === "smartPack" ? (
+          <SmartPackTab />
         ) : (
           <Placeholder label={t(`media.tab.${mediaTab}`)} />
         )}
diff --git a/web/src/components/media/MediaTabBar.tsx b/web/src/components/media/MediaTabBar.tsx
index 85f528a9..e87f35be 100644
--- a/web/src/components/media/MediaTabBar.tsx
+++ b/web/src/components/media/MediaTabBar.tsx
@@ -1,8 +1,8 @@
 /**
  * 剪映式顶部素材面板标签条。
- * - MediaTabBar：八个主标签横排（素材/音频/文本/贴纸/特效/转场/字幕/智能包裹），
+ * - MediaTabBar：九个主标签横排（素材/音频/音乐/文本/贴纸/特效/转场/字幕/智能包裹），
  *   选中=白+加粗+底部下划线；可用未选=次级灰+hover 提亮；禁用=极弱灰+不可点。
- *   目前仅「素材/音频」可用，其余为功能未做的置灰占位。
+ *   素材/音频/音乐/字幕已接真实内容，其余为功能未做的置灰占位。
  * - MediaSubTabBar：素材/音频下的「导入 / 我的」二级 pill 切换。
  * 文案全部走 i18n（dict 里 media.tab.* / media.subtab.*），不硬编码中文。
  */
@@ -21,12 +21,13 @@ interface MainTab {
 const MAIN_TABS: ReadonlyArray<MainTab> = [
   { id: "material", labelKey: "media.tab.material", enabled: true },
   { id: "audio", labelKey: "media.tab.audio", enabled: true },
+  { id: "music", labelKey: "media.tab.music", enabled: true },
   { id: "text", labelKey: "media.tab.text", enabled: false },
   { id: "sticker", labelKey: "media.tab.sticker", enabled: false },
   { id: "effect", labelKey: "media.tab.effect", enabled: false },
-  { id: "transition", labelKey: "media.tab.transition", enabled: false },
+  { id: "transition", labelKey: "media.tab.transition", enabled: true },
   { id: "subtitle", labelKey: "media.tab.subtitle", enabled: true },
-  { id: "smartPack", labelKey: "media.tab.smartPack", enabled: false },
+  { id: "smartPack", labelKey: "media.tab.smartPack", enabled: true },
 ];
 
 export function MediaTabBar({
diff --git a/web/src/components/media/MusicTab.test.tsx b/web/src/components/media/MusicTab.test.tsx
new file mode 100644
index 00000000..c19c31cb
--- /dev/null
+++ b/web/src/components/media/MusicTab.test.tsx
@@ -0,0 +1,107 @@
+// @vitest-environment happy-dom
+
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { MediaItem } from "../../lib/types";
+import { useChatStore } from "../../store/chatStore";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useLibraryStore } from "../../store/libraryStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { MusicTab } from "./MusicTab";
+
+function audio(id: string, name = id): MediaItem {
+  return {
+    id,
+    name,
+    type: "audio",
+    duration: 12,
+    hasAudio: true,
+    favorite: false,
+  };
+}
+
+afterEach(() => {
+  document.body.replaceChildren();
+  useMediaStore.setState({ items: [], folders: [], importing: false, error: null });
+  useLibraryStore.setState({ entries: [], loading: false, error: null });
+  useEditorUiStore.setState({ agentPanelVisible: false });
+  useChatStore.setState({ composerDraft: null });
+});
+
+describe("MusicTab", () => {
+  it("browses_imports_places_and_prepares_generation", async () => {
+    const projectTrack = audio("project-music", "Project Theme");
+    const importedTrack = audio("imported-music", "Library Theme");
+    useMediaStore.setState({ items: [projectTrack, importedTrack] });
+    useLibraryStore.setState({
+      entries: [
+        {
+          id: "library-music",
+          type: "audio",
+          category: "music",
+          favoritedAt: 1,
+          source: "/tmp/Library Theme.wav",
+        },
+      ],
+      refresh: vi.fn().mockResolvedValue(undefined),
+      importToProject: vi.fn().mockResolvedValue({
+        id: importedTrack.id,
+        name: importedTrack.name,
+        path: "/tmp/Library Theme.wav",
+      }),
+    });
+    const place = vi.fn().mockResolvedValue(undefined);
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<MusicTab onPlace={place} />));
+
+    expect(container.textContent).toContain("Project Theme");
+    expect(container.textContent).toContain("Library Theme.wav");
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-place-media="project-music"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(place).toHaveBeenCalledWith(projectTrack);
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-import-library="library-music"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(useLibraryStore.getState().importToProject).toHaveBeenCalledWith("library-music");
+    expect(place).toHaveBeenCalledWith(importedTrack);
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="generate-music"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(useEditorUiStore.getState().agentPanelVisible).toBe(true);
+    expect(useChatStore.getState().composerDraft).toContain("音乐");
+    await act(async () => root.unmount());
+  });
+
+  it("shows_a_typed_failure_when_timeline_placement_is_rejected", async () => {
+    useMediaStore.setState({ items: [audio("broken", "Broken Theme")] });
+    useLibraryStore.setState({ refresh: vi.fn().mockResolvedValue(undefined) });
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(<MusicTab onPlace={vi.fn().mockRejectedValue(new Error("timeline locked"))} />),
+    );
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-place-media="broken"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(container.querySelector('[role="alert"]')?.textContent).toContain("timeline locked");
+    await act(async () => root.unmount());
+  });
+});
diff --git a/web/src/components/media/MusicTab.tsx b/web/src/components/media/MusicTab.tsx
new file mode 100644
index 00000000..5cfbb338
--- /dev/null
+++ b/web/src/components/media/MusicTab.tsx
@@ -0,0 +1,315 @@
+import { useEffect, useMemo, useState, type ReactNode } from "react";
+import { Music, Plus, Sparkles, Upload } from "lucide-react";
+import { useT } from "../../i18n";
+import type { MediaItem } from "../../lib/types";
+import { sourceName, useLibraryStore } from "../../store/libraryStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { importFilesViaDialog } from "../../store/mediaActions";
+import { addMediaToTimeline } from "../../store/editActions";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useChatStore } from "../../store/chatStore";
+import { Icon } from "../ui/Icon";
+
+export function MusicTab({
+  onPlace = addMediaToTimeline,
+}: {
+  onPlace?: (item: MediaItem) => Promise<unknown>;
+}) {
+  const t = useT();
+  const projectItems = useMediaStore((state) => state.items);
+  const libraryEntries = useLibraryStore((state) => state.entries);
+  const libraryLoading = useLibraryStore((state) => state.loading);
+  const libraryError = useLibraryStore((state) => state.error);
+  const refreshLibrary = useLibraryStore((state) => state.refresh);
+  const importToProject = useLibraryStore((state) => state.importToProject);
+  const [query, setQuery] = useState("");
+  const [busyId, setBusyId] = useState<string | null>(null);
+  const [feedback, setFeedback] = useState<{
+    message: string;
+    kind: "success" | "error";
+  } | null>(null);
+
+  useEffect(() => {
+    void refreshLibrary();
+  }, [refreshLibrary]);
+
+  const normalizedQuery = query.trim().toLowerCase();
+  const projectMusic = useMemo(
+    () =>
+      projectItems.filter(
+        (item) =>
+          item.type === "audio" &&
+          (normalizedQuery === "" || item.name.toLowerCase().includes(normalizedQuery)),
+      ),
+    [normalizedQuery, projectItems],
+  );
+  const savedMusic = useMemo(
+    () =>
+      libraryEntries.filter((entry) => {
+        if (entry.type !== "audio" || entry.category === "sound") return false;
+        const name = sourceName(entry.source ?? entry.storedPath);
+        return normalizedQuery === "" || name.toLowerCase().includes(normalizedQuery);
+      }),
+    [libraryEntries, normalizedQuery],
+  );
+
+  async function place(item: MediaItem) {
+    if (busyId !== null) return;
+    setBusyId(item.id);
+    setFeedback(null);
+    try {
+      await onPlace(item);
+      setFeedback({ message: t("media.music.placed", { name: item.name }), kind: "success" });
+    } catch (reason) {
+      setFeedback({
+        message: t("media.music.placeFailed", {
+          error: reason instanceof Error ? reason.message : String(reason),
+        }),
+        kind: "error",
+      });
+    } finally {
+      setBusyId(null);
+    }
+  }
+
+  async function importAndPlace(libraryId: string) {
+    if (busyId !== null) return;
+    setBusyId(libraryId);
+    setFeedback(null);
+    try {
+      const imported = await importToProject(libraryId);
+      if (!imported) throw new Error(t("media.music.importFailed"));
+      const item = useMediaStore.getState().items.find((candidate) => candidate.id === imported.id);
+      if (!item) throw new Error(t("media.music.importRefreshFailed"));
+      await onPlace(item);
+      setFeedback({
+        message: t("media.music.placed", { name: imported.name }),
+        kind: "success",
+      });
+    } catch (reason) {
+      setFeedback({
+        message: t("media.music.placeFailed", {
+          error: reason instanceof Error ? reason.message : String(reason),
+        }),
+        kind: "error",
+      });
+    } finally {
+      setBusyId(null);
+    }
+  }
+
+  function prepareGeneration() {
+    useChatStore.getState().setComposerDraft(t("media.music.generateDraft"));
+    const ui = useEditorUiStore.getState();
+    if (!ui.agentPanelVisible) ui.toggleAgentPanel();
+  }
+
+  return (
+    <div
+      data-testid="music-tab"
+      style={{ display: "flex", flexDirection: "column", minHeight: 0, height: "100%" }}
+    >
+      <div
+        style={{
+          display: "flex",
+          alignItems: "center",
+          gap: "var(--space-xs)",
+          padding: "var(--space-sm)",
+          borderBottom: "var(--bw-thin) solid var(--border-primary)",
+        }}
+      >
+        <button type="button" onClick={() => void importFilesViaDialog()} style={secondaryButtonStyle}>
+          <Icon icon={Upload} size={12} />
+          {t("media.music.import")}
+        </button>
+        <button
+          type="button"
+          data-action="generate-music"
+          onClick={prepareGeneration}
+          style={generateButtonStyle}
+        >
+          <Icon icon={Sparkles} size={12} />
+          {t("media.music.generate")}
+        </button>
+        <input
+          type="search"
+          value={query}
+          onChange={(event) => setQuery(event.target.value)}
+          aria-label={t("media.search")}
+          placeholder={t("media.search")}
+          style={{
+            flex: 1,
+            minWidth: 80,
+            height: 24,
+            padding: "0 var(--space-sm)",
+            borderRadius: "var(--radius-sm)",
+            border: "var(--bw-thin) solid var(--border-primary)",
+            background: "var(--bg-raised)",
+            color: "var(--text-primary)",
+            fontSize: "var(--fs-xs)",
+          }}
+        />
+      </div>
+
+      {feedback && (
+        <div
+          role={feedback.kind === "error" ? "alert" : "status"}
+          style={{
+            padding: "var(--space-xs) var(--space-sm)",
+            color:
+              feedback.kind === "error" ? "var(--status-error)" : "var(--text-secondary)",
+            fontSize: "var(--fs-xs)",
+          }}
+        >
+          {feedback.message}
+        </div>
+      )}
+      {libraryError && (
+        <div role="alert" style={{ padding: "var(--space-xs) var(--space-sm)", color: "var(--status-error)", fontSize: "var(--fs-xs)" }}>
+          {libraryError}
+        </div>
+      )}
+
+      <div style={{ flex: 1, minHeight: 0, overflowY: "auto", padding: "var(--space-sm)" }}>
+        <MusicSection title={t("media.music.projectSection")} empty={projectMusic.length === 0}>
+          {projectMusic.map((item) => (
+            <MusicRow
+              key={item.id}
+              name={item.name}
+              disabled={busyId !== null || !!item.missing}
+              buttonLabel={t("media.music.place")}
+              dataAttribute={{ "data-place-media": item.id }}
+              onClick={() => void place(item)}
+            />
+          ))}
+        </MusicSection>
+
+        <MusicSection
+          title={t("media.music.librarySection")}
+          empty={!libraryLoading && savedMusic.length === 0}
+          loading={libraryLoading}
+        >
+          {savedMusic.map((entry) => (
+            <MusicRow
+              key={entry.id}
+              name={sourceName(entry.source ?? entry.storedPath) || entry.id}
+              disabled={busyId !== null}
+              buttonLabel={t("media.music.importAndPlace")}
+              dataAttribute={{ "data-import-library": entry.id }}
+              onClick={() => void importAndPlace(entry.id)}
+            />
+          ))}
+        </MusicSection>
+      </div>
+    </div>
+  );
+}
+
+function MusicSection({
+  title,
+  empty,
+  loading = false,
+  children,
+}: {
+  title: string;
+  empty: boolean;
+  loading?: boolean;
+  children: ReactNode;
+}) {
+  const t = useT();
+  return (
+    <section style={{ marginBottom: "var(--space-lg)" }}>
+      <h3
+        style={{
+          margin: "0 0 var(--space-xs)",
+          color: "var(--text-muted)",
+          fontSize: "var(--fs-xxs)",
+          letterSpacing: "var(--tracking-wide)",
+          textTransform: "uppercase",
+        }}
+      >
+        {title}
+      </h3>
+      {loading ? (
+        <div style={emptyStyle}>{t("media.importing")}</div>
+      ) : empty ? (
+        <div style={emptyStyle}>{t("media.music.empty")}</div>
+      ) : (
+        <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-xxs)" }}>
+          {children}
+        </div>
+      )}
+    </section>
+  );
+}
+
+function MusicRow({
+  name,
+  disabled,
+  buttonLabel,
+  dataAttribute,
+  onClick,
+}: {
+  name: string;
+  disabled: boolean;
+  buttonLabel: string;
+  dataAttribute: Record<string, string>;
+  onClick: () => void;
+}) {
+  return (
+    <div
+      style={{
+        display: "flex",
+        alignItems: "center",
+        gap: "var(--space-sm)",
+        minHeight: 34,
+        padding: "0 var(--space-sm)",
+        borderRadius: "var(--radius-sm)",
+        background: "var(--bg-raised)",
+      }}
+    >
+      <Icon icon={Music} size={13} />
+      <span style={{ flex: 1, minWidth: 0, overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap", fontSize: "var(--fs-sm)" }}>
+        {name}
+      </span>
+      <button
+        type="button"
+        {...dataAttribute}
+        disabled={disabled}
+        onClick={onClick}
+        style={secondaryButtonStyle}
+      >
+        <Icon icon={Plus} size={11} />
+        {buttonLabel}
+      </button>
+    </div>
+  );
+}
+
+const emptyStyle = {
+  padding: "var(--space-md)",
+  color: "var(--text-tertiary)",
+  fontSize: "var(--fs-xs)",
+  textAlign: "center",
+} as const;
+
+const secondaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  gap: 4,
+  minHeight: 23,
+  padding: "1px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  border: "var(--bw-thin) solid var(--border-primary)",
+  background: "var(--bg-prominent)",
+  color: "var(--text-primary)",
+  fontSize: "var(--fs-xs)",
+} as const;
+
+const generateButtonStyle = {
+  ...secondaryButtonStyle,
+  border: "none",
+  background: "var(--ai-gradient)",
+  color: "#111",
+  fontWeight: "var(--fw-semibold)",
+} as const;
diff --git a/web/src/components/media/ScriptToVideoTab.test.tsx b/web/src/components/media/ScriptToVideoTab.test.tsx
new file mode 100644
index 00000000..3686c30f
--- /dev/null
+++ b/web/src/components/media/ScriptToVideoTab.test.tsx
@@ -0,0 +1,115 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { useI18nStore } from "../../i18n";
+import type { MediaItem, ScriptToVideoResult, ScriptToVideoSegmentInput } from "../../lib/types";
+import { useMediaStore } from "../../store/mediaStore";
+import { useProjectStore } from "../../store/projectStore";
+import { ScriptToVideoTab, type ScriptToVideoDependencies } from "./ScriptToVideoTab";
+
+function media(id: string, type: "image" | "audio", duration = 0): MediaItem {
+  return { id, name: id, type, duration, hasAudio: type === "audio", favorite: false };
+}
+
+function result(segments: ScriptToVideoSegmentInput[], applied = false): ScriptToVideoResult {
+  let cursor = 0;
+  return {
+    result: {
+      projectEpoch: 4,
+      version: applied ? 12 : 11,
+      planId: "script-plan-test",
+      planHash: "a".repeat(64),
+      planner: "opentake-script-assembly",
+      plannerVersion: 1,
+      startFrame: 0,
+      endFrame: segments.reduce((sum, segment) => sum + segment.durationFrames, 0),
+      segments: segments.map((segment) => {
+        const startFrame = cursor;
+        cursor += segment.durationFrames;
+        return { ...segment, startFrame };
+      }),
+      applied,
+    },
+    actionName: applied ? "Build Script Video" : "Plan Script Video",
+  };
+}
+
+function setText(element: HTMLTextAreaElement, value: string) {
+  Object.getOwnPropertyDescriptor(HTMLTextAreaElement.prototype, "value")?.set?.call(element, value);
+  element.dispatchEvent(new Event("input", { bubbles: true }));
+}
+
+describe("ScriptToVideoTab", () => {
+  let container: HTMLDivElement;
+  let root: Root;
+  let run: ReturnType<typeof vi.fn>;
+  let cancel: ReturnType<typeof vi.fn>;
+  let undo: ReturnType<typeof vi.fn>;
+
+  beforeEach(() => {
+    useI18nStore.setState({ locale: "en" });
+    useMediaStore.setState({ items: [media("visual-1", "image"), media("visual-2", "image"), media("visual-3", "image"), media("voice", "audio", 1)], folders: [], importing: false, error: null });
+    useProjectStore.setState({ timeline: { fps: 30, width: 1920, height: 1080, settingsConfigured: true, tracks: [] } });
+    run = vi.fn();
+    cancel = vi.fn().mockResolvedValue(true);
+    undo = vi.fn().mockResolvedValue(undefined);
+    container = document.createElement("div");
+    document.body.appendChild(container);
+    root = createRoot(container);
+  });
+
+  afterEach(async () => {
+    await act(async () => root.unmount());
+    container.remove();
+  });
+
+  it("persists, reviews, edits, retries, applies, and undoes a three-segment plan", async () => {
+    run.mockImplementation((segments: ScriptToVideoSegmentInput[], apply: boolean) => Promise.resolve(result(segments, apply)));
+    const dependencies: ScriptToVideoDependencies = { run, cancel, undo };
+    await act(async () => root.render(<ScriptToVideoTab dependencies={dependencies} />));
+    const textareas = Array.from(container.querySelectorAll("textarea"));
+    await act(async () => textareas.forEach((textarea, index) => setText(textarea, `Scene ${index + 1}`)));
+    const selects = Array.from(container.querySelectorAll("select"));
+    await act(async () => {
+      for (let index = 0; index < 3; index += 1) {
+        const visual = selects[index * 2];
+        visual.value = `visual-${index + 1}`;
+        visual.dispatchEvent(new Event("change", { bubbles: true }));
+        const narration = selects[index * 2 + 1];
+        narration.value = "voice";
+        narration.dispatchEvent(new Event("change", { bubbles: true }));
+      }
+    });
+    const button = (label: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(label))!;
+    await act(async () => button("Save & Review Plan").click());
+    expect(run).toHaveBeenLastCalledWith(expect.arrayContaining([expect.objectContaining({ script: "Scene 1", mediaRef: "visual-1", narrationMediaRef: "voice", durationFrames: 30 })]), false);
+    expect(container.textContent).toContain("Plan persisted: 3 segments");
+
+    await act(async () => setText(textareas[1], "Edited second scene"));
+    expect(container.textContent).not.toContain("Plan persisted: 3 segments");
+    await act(async () => button("Save & Review Plan").click());
+    expect(run).toHaveBeenCalledTimes(2);
+    await act(async () => button("Start Assembly").click());
+    expect(run).toHaveBeenLastCalledWith(expect.arrayContaining([expect.objectContaining({ script: "Edited second scene" })]), true);
+    expect(container.textContent).toContain("one undo step");
+    await act(async () => button("Undo Assembly").click());
+    expect(undo).toHaveBeenCalledOnce();
+  });
+
+  it("cancels pending planning and ignores the stale result", async () => {
+    let resolve: ((value: ScriptToVideoResult) => void) | undefined;
+    run.mockImplementation((segments: ScriptToVideoSegmentInput[]) => new Promise<ScriptToVideoResult>((done) => { resolve = () => done(result(segments)); }));
+    const dependencies: ScriptToVideoDependencies = { run, cancel, undo };
+    await act(async () => root.render(<ScriptToVideoTab dependencies={dependencies} />));
+    const textareas = Array.from(container.querySelectorAll("textarea"));
+    await act(async () => textareas.forEach((textarea, index) => setText(textarea, `Scene ${index + 1}`)));
+    const button = (label: string) => Array.from(container.querySelectorAll("button")).find((candidate) => candidate.textContent?.includes(label))!;
+    await act(async () => button("Save & Review Plan").click());
+    await act(async () => button("Cancel").click());
+    expect(cancel).toHaveBeenCalledOnce();
+    await act(async () => resolve?.(result([])));
+    expect(container.textContent).not.toContain("Plan persisted");
+  });
+});
diff --git a/web/src/components/media/ScriptToVideoTab.tsx b/web/src/components/media/ScriptToVideoTab.tsx
new file mode 100644
index 00000000..94f6d9d2
--- /dev/null
+++ b/web/src/components/media/ScriptToVideoTab.tsx
@@ -0,0 +1,136 @@
+import { useEffect, useMemo, useRef, useState } from "react";
+import { useT } from "../../i18n";
+import * as api from "../../lib/api";
+import type { ScriptToVideoResult, ScriptToVideoSegmentInput } from "../../lib/types";
+import * as edit from "../../store/editActions";
+import { useMediaStore } from "../../store/mediaStore";
+import { useProjectStore } from "../../store/projectStore";
+import { RADIUS, SPACE } from "../../lib/theme";
+
+type Phase = "idle" | "planning" | "review" | "applying" | "applied";
+
+export interface ScriptToVideoDependencies {
+  run: (segments: ScriptToVideoSegmentInput[], apply: boolean) => Promise<ScriptToVideoResult>;
+  cancel: () => Promise<boolean>;
+  undo: () => Promise<unknown>;
+}
+
+const defaultDependencies: ScriptToVideoDependencies = {
+  run: api.scriptToVideo,
+  cancel: api.cancelAdvancedWorkflow,
+  undo: edit.undo,
+};
+
+function emptySegment(mediaRef = ""): ScriptToVideoSegmentInput {
+  return { script: "", mediaRef, durationFrames: 90, transition: "crossDissolve" };
+}
+
+export function ScriptToVideoTab({ dependencies = defaultDependencies }: { dependencies?: ScriptToVideoDependencies }) {
+  const t = useT();
+  const items = useMediaStore((state) => state.items);
+  const fps = useProjectStore((state) => state.timeline.fps);
+  const visuals = useMemo(() => items.filter((item) => item.type === "image" || item.type === "video" || item.type === "lottie"), [items]);
+  const narrations = useMemo(() => items.filter((item) => (item.type === "audio" || item.type === "video") && item.hasAudio), [items]);
+  const [segments, setSegments] = useState<ScriptToVideoSegmentInput[]>(() => [emptySegment(), emptySegment(), { ...emptySegment(), transition: undefined }]);
+  const [phase, setPhase] = useState<Phase>("idle");
+  const [result, setResult] = useState<ScriptToVideoResult | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const operation = useRef(0);
+
+  useEffect(() => {
+    const first = visuals[0]?.id ?? "";
+    setSegments((current) => current.map((segment) => visuals.some((item) => item.id === segment.mediaRef) ? segment : { ...segment, mediaRef: first }));
+  }, [visuals]);
+
+  const revise = (index: number, patch: Partial<ScriptToVideoSegmentInput>) => {
+    operation.current += 1;
+    setSegments((current) => current.map((segment, cursor) => cursor === index ? { ...segment, ...patch } : segment));
+    setResult(null);
+    setError(null);
+    setPhase("idle");
+  };
+
+  const run = async (apply: boolean) => {
+    const request = operation.current + 1;
+    operation.current = request;
+    setPhase(apply ? "applying" : "planning");
+    setError(null);
+    try {
+      const next = await dependencies.run(segments, apply);
+      if (operation.current !== request) return;
+      setResult(next);
+      setPhase(apply ? "applied" : "review");
+    } catch (reason) {
+      if (operation.current !== request) return;
+      setError(reason instanceof Error ? reason.message : String(reason));
+      setPhase(result ? "review" : "idle");
+    }
+  };
+
+  const cancel = async () => {
+    operation.current += 1;
+    await dependencies.cancel();
+    setPhase(result ? "review" : "idle");
+  };
+
+  const undo = async () => {
+    setPhase("applying");
+    try {
+      await dependencies.undo();
+      setPhase("review");
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+      setPhase("applied");
+    }
+  };
+
+  const ready = segments.length > 0 && segments.every((segment) => segment.script.trim() && segment.mediaRef && segment.durationFrames > 0);
+  const busy = phase === "planning" || phase === "applying";
+  return (
+    <div data-testid="script-to-video-tab" style={{ height: "100%", overflowY: "auto", padding: SPACE.mdLg, display: "flex", flexDirection: "column", gap: SPACE.md }}>
+      <div style={{ color: "var(--text-secondary)", fontSize: "var(--fs-sm)" }}>{t("scriptVideo.description")}</div>
+      {segments.map((segment, index) => (
+        <section key={index} style={{ padding: SPACE.md, border: "var(--bw-thin) solid var(--border-subtle)", borderRadius: RADIUS.md, display: "flex", flexDirection: "column", gap: SPACE.sm }}>
+          <div style={{ display: "flex", justifyContent: "space-between", color: "var(--text-secondary)", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" }}>
+            <span>{t("scriptVideo.segment", { number: index + 1 })}</span>
+            {segments.length > 1 && <button type="button" disabled={busy} onClick={() => { const next = segments.filter((_, cursor) => cursor !== index).map((item, cursor, all) => cursor === all.length - 1 ? { ...item, transition: undefined } : item); setSegments(next); setResult(null); setPhase("idle"); }}>{t("scriptVideo.remove")}</button>}
+          </div>
+          <textarea aria-label={t("scriptVideo.script", { number: index + 1 })} value={segment.script} disabled={busy || phase === "applied"} placeholder={t("scriptVideo.scriptPlaceholder")} onChange={(event) => revise(index, { script: event.currentTarget.value })} style={{ ...inputStyle, minHeight: 58, resize: "vertical" }} />
+          <label style={labelStyle}>{t("scriptVideo.visual")}
+            <select value={segment.mediaRef} disabled={busy || phase === "applied"} onChange={(event) => revise(index, { mediaRef: event.currentTarget.value })} style={inputStyle}>
+              <option value="">{t("scriptVideo.chooseVisual")}</option>
+              {visuals.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+            </select>
+          </label>
+          <label style={labelStyle}>{t("scriptVideo.narration")}
+            <select value={segment.narrationMediaRef ?? ""} disabled={busy || phase === "applied"} onChange={(event) => { const narration = narrations.find((item) => item.id === event.currentTarget.value); revise(index, { narrationMediaRef: narration?.id || undefined, ...(narration && narration.duration > 0 ? { durationFrames: Math.max(1, Math.round(narration.duration * Math.max(1, fps))) } : {}) }); }} style={inputStyle}>
+              <option value="">{t("scriptVideo.noNarration")}</option>
+              {narrations.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
+            </select>
+          </label>
+          <label style={labelStyle}>{t("scriptVideo.duration")}
+            <input type="number" min={1} max={36000} value={segment.durationFrames} disabled={busy || phase === "applied"} onChange={(event) => revise(index, { durationFrames: Math.max(1, Number(event.currentTarget.value) || 1) })} style={inputStyle} />
+          </label>
+          {index < segments.length - 1 && <label style={{ ...labelStyle, flexDirection: "row", alignItems: "center" }}><input type="checkbox" checked={segment.transition === "crossDissolve"} disabled={busy || phase === "applied"} onChange={(event) => revise(index, { transition: event.currentTarget.checked ? "crossDissolve" : undefined })} />{t("scriptVideo.transition")}</label>}
+        </section>
+      ))}
+      {phase !== "applied" && <button type="button" disabled={busy || visuals.length === 0} onClick={() => { setSegments((current) => [...current.map((segment) => ({ ...segment, transition: segment.transition ?? "crossDissolve" })), { ...emptySegment(visuals[0]?.id), transition: undefined }]); setResult(null); setPhase("idle"); }} style={secondaryButtonStyle}>{t("scriptVideo.addSegment")}</button>}
+      {result && <div style={{ padding: SPACE.sm, borderRadius: RADIUS.sm, background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" }}>{t("scriptVideo.planSummary", { count: result.result.segments.length, start: result.result.startFrame, end: result.result.endFrame })}<br />{result.result.planId}</div>}
+      <div style={{ display: "flex", flexWrap: "wrap", gap: SPACE.sm }}>
+        {phase === "applied" ? <button type="button" onClick={() => void undo()} style={primaryButtonStyle}>{t("scriptVideo.undo")}</button> : <>
+          <button type="button" disabled={!ready || busy || visuals.length === 0} onClick={() => void run(false)} style={secondaryButtonStyle}>{phase === "planning" ? t("scriptVideo.planning") : error ? t("scriptVideo.retry") : t("scriptVideo.review")}</button>
+          <button type="button" disabled={!result || busy || phase !== "review"} onClick={() => void run(true)} style={primaryButtonStyle}>{phase === "applying" ? t("scriptVideo.applying") : t("scriptVideo.apply")}</button>
+        </>}
+        {busy && <button type="button" onClick={() => void cancel()} style={secondaryButtonStyle}>{t("scriptVideo.cancel")}</button>}
+      </div>
+      {phase === "applied" && <div role="status" style={{ color: "var(--status-success)", fontSize: "var(--fs-xs)" }}>{t("scriptVideo.applied")}</div>}
+      {visuals.length === 0 && <div role="status" style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>{t("scriptVideo.noVisuals")}</div>}
+      {error && <div role="alert" style={{ color: "var(--status-error)", fontSize: "var(--fs-xs)" }}>{error}</div>}
+    </div>
+  );
+}
+
+const labelStyle = { display: "flex", flexDirection: "column", gap: 3, color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" } as const;
+const inputStyle = { width: "100%", boxSizing: "border-box", padding: "5px var(--space-sm)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-surface)", color: "var(--text-primary)", fontSize: "var(--fs-xs)" } as const;
+const primaryButtonStyle = { minHeight: 28, padding: "4px var(--space-md)", borderRadius: "var(--radius-sm)", background: "var(--ai-gradient)", color: "#111", fontSize: "var(--fs-xs)", fontWeight: "var(--fw-semibold)" } as const;
+const secondaryButtonStyle = { minHeight: 28, padding: "4px var(--space-md)", borderRadius: "var(--radius-sm)", border: "var(--bw-thin) solid var(--border-primary)", background: "var(--bg-raised)", color: "var(--text-secondary)", fontSize: "var(--fs-xs)" } as const;
diff --git a/web/src/components/media/SmartPackTab.tsx b/web/src/components/media/SmartPackTab.tsx
new file mode 100644
index 00000000..dd952115
--- /dev/null
+++ b/web/src/components/media/SmartPackTab.tsx
@@ -0,0 +1,26 @@
+import { useState } from "react";
+import { useT } from "../../i18n";
+import { RADIUS, SPACE } from "../../lib/theme";
+import { AvatarGenerationTab, VoiceCloneTab } from "./IdentityGenerationTabs";
+import { ScriptToVideoTab } from "./ScriptToVideoTab";
+
+type Mode = "script" | "avatar" | "voice";
+
+export function SmartPackTab() {
+  const t = useT();
+  const [mode, setMode] = useState<Mode>("script");
+  return (
+    <div style={{ height: "100%", display: "flex", flexDirection: "column", minHeight: 0 }}>
+      <div role="tablist" aria-label={t("smartPack.workflows")} style={{ display: "flex", gap: SPACE.xs, padding: `${SPACE.sm}px ${SPACE.mdLg}px`, borderBottom: "var(--bw-thin) solid var(--border-subtle)" }}>
+        {(["script", "avatar", "voice"] as const).map((value) => (
+          <button key={value} type="button" role="tab" aria-selected={mode === value} onClick={() => setMode(value)} style={{ padding: `5px ${SPACE.md}px`, borderRadius: RADIUS.sm, background: mode === value ? "var(--bg-selected)" : "transparent", color: mode === value ? "var(--text-primary)" : "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+            {t(`smartPack.${value}`)}
+          </button>
+        ))}
+      </div>
+      <div style={{ flex: 1, minHeight: 0 }}>
+        {mode === "script" ? <ScriptToVideoTab /> : mode === "avatar" ? <AvatarGenerationTab /> : <VoiceCloneTab />}
+      </div>
+    </div>
+  );
+}
diff --git a/web/src/components/media/SoundLibraryTab.tsx b/web/src/components/media/SoundLibraryTab.tsx
index d7dbe1d7..9e3db1f4 100644
--- a/web/src/components/media/SoundLibraryTab.tsx
+++ b/web/src/components/media/SoundLibraryTab.tsx
@@ -9,6 +9,7 @@ import { AudioWaveform, Plus } from "lucide-react";
 import { useLibraryStore, selectEntries, sourceName } from "../../store/libraryStore";
 import { useT } from "../../i18n";
 import { Icon } from "../ui/Icon";
+import type { LibraryImport } from "../../lib/libraryApi";
 
 export function SoundLibraryTab({ query }: { query: string }) {
   const t = useT();
@@ -75,7 +76,7 @@ function SoundRow({
   onImport,
 }: {
   name: string;
-  onImport: () => Promise<string | null>;
+  onImport: () => Promise<LibraryImport | null>;
 }) {
   const t = useT();
   const [busy, setBusy] = useState(false);
@@ -86,7 +87,7 @@ function SoundRow({
     setBusy(true);
     const added = await onImport();
     setBusy(false);
-    setFeedback(added ? t("media.sound.added", { name: added }) : t("media.sound.failed"));
+    setFeedback(added ? t("media.sound.added", { name: added.name }) : t("media.sound.failed"));
     setTimeout(() => setFeedback(null), 1500);
   };
 
diff --git a/web/src/components/media/TransitionTab.test.tsx b/web/src/components/media/TransitionTab.test.tsx
new file mode 100644
index 00000000..fb6c67f4
--- /dev/null
+++ b/web/src/components/media/TransitionTab.test.tsx
@@ -0,0 +1,209 @@
+// @vitest-environment happy-dom
+
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { Clip, Timeline } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { PanelShell } from "../ui/PanelShell";
+import { resolveTransitionPair, TransitionTab } from "./TransitionTab";
+
+function clip(id: string, startFrame: number, durationFrames: number): Clip {
+  return {
+    id,
+    mediaRef: id,
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame,
+    durationFrames,
+    trimStartFrame: 0,
+    trimEndFrame: durationFrames,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+  };
+}
+
+function timeline(clips: Clip[]): Timeline {
+  return {
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    settingsConfigured: true,
+    tracks: [
+      {
+        id: "v1",
+        name: "Video 1",
+        type: "video",
+        muted: false,
+        hidden: false,
+        syncLocked: true,
+        clips,
+      },
+    ],
+  };
+}
+
+afterEach(() => {
+  document.body.replaceChildren();
+  useEditorUiStore.setState({ selectedClipIds: new Set() });
+  useProjectStore.getState().clearProjectSnapshot();
+});
+
+describe("TransitionTab", () => {
+  it("resolves_a_cut_from_one_linked_video_and_audio_selection", () => {
+    const a = clip("a", 0, 60);
+    a.linkGroupId = "linked";
+    const b = clip("b", 60, 60);
+    const linkedAudio = clip("a-audio", 0, 60);
+    linkedAudio.mediaType = "audio";
+    linkedAudio.linkGroupId = "linked";
+    const linkedTimeline = timeline([a, b]);
+    linkedTimeline.tracks.push({
+      id: "audio-1",
+      type: "audio",
+      muted: false,
+      hidden: false,
+      syncLocked: true,
+      clips: [linkedAudio],
+    });
+
+    expect(
+      resolveTransitionPair(linkedTimeline, new Set([a.id, linkedAudio.id]))?.from.id,
+    ).toBe("a");
+  });
+
+  it("applies_and_removes_cross_dissolve_at_the_selected_cut", async () => {
+    const a = clip("a", 0, 60);
+    const b = clip("b", 60, 60);
+    useProjectStore.setState({ timeline: timeline([a, b]) });
+    useEditorUiStore.setState({ selectedClipIds: new Set([a.id]) });
+    const apply = vi.fn().mockResolvedValue(undefined);
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<TransitionTab onApply={apply} />));
+
+    expect(container.textContent).toContain("a → b");
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="apply-transition"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(apply).toHaveBeenCalledWith("a", "b", "crossDissolve", 15);
+
+    useProjectStore.setState({
+      timeline: timeline([
+        { ...a, transitionOut: { fromClipId: "a", toClipId: "b", kind: "crossDissolve", durationFrames: 15 } },
+        b,
+      ]),
+    });
+    await act(async () => undefined);
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="remove-transition"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(apply).toHaveBeenLastCalledWith("a", "b", null, 15);
+    await act(async () => root.unmount());
+  });
+
+  it("preserves_a_visible_failure_for_retry", async () => {
+    const a = clip("a", 0, 60);
+    const b = clip("b", 60, 60);
+    useProjectStore.setState({ timeline: timeline([a, b]) });
+    useEditorUiStore.setState({ selectedClipIds: new Set([a.id]) });
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(
+        <TransitionTab onApply={vi.fn().mockRejectedValue(new Error("cut changed"))} />,
+      ),
+    );
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="apply-transition"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(container.querySelector('[role="alert"]')?.textContent).toContain("cut changed");
+    expect(container.querySelector<HTMLButtonElement>('[data-action="apply-transition"]')?.disabled).toBe(
+      false,
+    );
+    await act(async () => root.unmount());
+  });
+
+  it("keeps_the_timeline_cut_selected_while_editing_inside_the_media_panel", async () => {
+    const a = clip("a", 0, 60);
+    const b = clip("b", 60, 60);
+    useProjectStore.setState({ timeline: timeline([a, b]) });
+    useEditorUiStore.setState({ selectedClipIds: new Set([a.id]) });
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(
+        <PanelShell panel="media">
+          <TransitionTab onApply={vi.fn().mockResolvedValue(undefined)} />
+        </PanelShell>,
+      ),
+    );
+
+    const apply = container.querySelector<HTMLButtonElement>('[data-action="apply-transition"]')!;
+    await act(async () => {
+      apply.dispatchEvent(new MouseEvent("mousedown", { bubbles: true }));
+      apply.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+    expect(useEditorUiStore.getState().selectedClipIds).toEqual(new Set([a.id]));
+    await act(async () => root.unmount());
+  });
+
+  it("clears_stale_removal_feedback_when_global_undo_restores_the_transition", async () => {
+    const a = clip("a", 0, 60);
+    const b = clip("b", 60, 60);
+    const withTransition = timeline([
+      { ...a, transitionOut: { fromClipId: "a", toClipId: "b", kind: "crossDissolve", durationFrames: 15 } },
+      b,
+    ]);
+    useProjectStore.setState({ timeline: withTransition });
+    useEditorUiStore.setState({ selectedClipIds: new Set([a.id]) });
+    const apply = vi.fn(async () => {
+      useProjectStore.setState({ timeline: timeline([a, b]) });
+    });
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () => root.render(<TransitionTab onApply={apply} />));
+
+    await act(async () =>
+      container
+        .querySelector<HTMLButtonElement>('[data-action="remove-transition"]')!
+        .dispatchEvent(new MouseEvent("click", { bubbles: true })),
+    );
+    expect(container.querySelector('[role="status"]')?.textContent).toContain("转场已移除");
+
+    await act(async () => useProjectStore.setState({ timeline: withTransition }));
+    expect(container.querySelector('[role="status"]')).toBeNull();
+    expect(
+      container.querySelector<HTMLButtonElement>('button[aria-pressed="true"]'),
+    ).not.toBeNull();
+    await act(async () => root.unmount());
+  });
+});
diff --git a/web/src/components/media/TransitionTab.tsx b/web/src/components/media/TransitionTab.tsx
new file mode 100644
index 00000000..827f4991
--- /dev/null
+++ b/web/src/components/media/TransitionTab.tsx
@@ -0,0 +1,247 @@
+import { useEffect, useMemo, useState } from "react";
+import { Blend, Trash2 } from "lucide-react";
+import { useT } from "../../i18n";
+import { findLogicalSingleClip } from "../../lib/clip";
+import type { Clip, Timeline, TransitionKind } from "../../lib/types";
+import { useProjectStore } from "../../store/projectStore";
+import { useEditorUiStore } from "../../store/uiStore";
+import { setTransition } from "../../store/editActions";
+import { Icon } from "../ui/Icon";
+
+export interface TransitionPair {
+  from: Clip;
+  to: Clip;
+  maximumDurationFrames: number;
+}
+
+export function resolveTransitionPair(
+  timeline: Timeline,
+  selectedClipIds: Set<string>,
+): TransitionPair | null {
+  const selected = findLogicalSingleClip(timeline, selectedClipIds);
+  if (!selected || selected.mediaType === "audio" || selected.mediaType === "text") return null;
+  const selectedId = selected.id;
+  for (const track of timeline.tracks) {
+    if (track.type === "audio") continue;
+    const clips = track.clips
+      .filter((clip) => clip.mediaType !== "audio" && clip.mediaType !== "text")
+      .slice()
+      .sort((a, b) => a.startFrame - b.startFrame || a.id.localeCompare(b.id));
+    const selectedIndex = clips.findIndex((clip) => clip.id === selectedId);
+    if (selectedIndex < 0) continue;
+    const candidates: Array<[Clip | undefined, Clip | undefined]> = [
+      [clips[selectedIndex], clips[selectedIndex + 1]],
+      [clips[selectedIndex - 1], clips[selectedIndex]],
+    ];
+    for (const [from, to] of candidates) {
+      if (!from || !to || from.startFrame + from.durationFrames !== to.startFrame) continue;
+      return {
+        from,
+        to,
+        maximumDurationFrames: Math.max(
+          1,
+          Math.floor(Math.min(from.durationFrames, to.durationFrames) / 2),
+        ),
+      };
+    }
+  }
+  return null;
+}
+
+export function TransitionTab({
+  onApply = setTransition,
+}: {
+  onApply?: (
+    fromClipId: string,
+    toClipId: string,
+    kind: TransitionKind | null,
+    durationFrames: number,
+  ) => Promise<unknown>;
+}) {
+  const t = useT();
+  const timeline = useProjectStore((state) => state.timeline);
+  const selectedClipIds = useEditorUiStore((state) => state.selectedClipIds);
+  const pair = useMemo(
+    () => resolveTransitionPair(timeline, selectedClipIds),
+    [selectedClipIds, timeline],
+  );
+  const [durationFrames, setDurationFrames] = useState(() => Math.max(1, Math.round(timeline.fps / 2)));
+  const [pending, setPending] = useState(false);
+  const [feedback, setFeedback] = useState<{
+    transitionKind: TransitionKind | null;
+    message: string;
+  } | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!pair) return;
+    const current = pair.from.transitionOut;
+    const matchesPair =
+      current?.toClipId === pair.to.id &&
+      (!current.fromClipId || current.fromClipId === pair.from.id);
+    setDurationFrames(
+      Math.min(
+        pair.maximumDurationFrames,
+        Math.max(1, matchesPair ? current.durationFrames : Math.round(timeline.fps / 2)),
+      ),
+    );
+  }, [pair?.from.id, pair?.from.transitionOut?.durationFrames, pair?.to.id, pair?.maximumDurationFrames, timeline.fps]);
+
+  useEffect(() => {
+    setFeedback(null);
+    setError(null);
+  }, [pair?.from.id, pair?.to.id]);
+
+  async function update(kind: TransitionKind | null) {
+    if (!pair || pending) return;
+    setPending(true);
+    setFeedback(null);
+    setError(null);
+    try {
+      await onApply(pair.from.id, pair.to.id, kind, durationFrames);
+      setFeedback({
+        transitionKind: kind,
+        message:
+          kind === null ? t("media.transition.removed") : t("media.transition.applied"),
+      });
+    } catch (reason) {
+      setError(reason instanceof Error ? reason.message : String(reason));
+    } finally {
+      setPending(false);
+    }
+  }
+
+  if (!pair) {
+    return (
+      <div
+        data-testid="transition-tab"
+        role="status"
+        onMouseDown={(event) => event.stopPropagation()}
+        style={{ flex: 1, display: "grid", placeItems: "center", padding: "var(--space-lg)", color: "var(--text-tertiary)", fontSize: "var(--fs-sm)", textAlign: "center" }}
+      >
+        {t("media.transition.selectCut")}
+      </div>
+    );
+  }
+
+  const authored = pair.from.transitionOut;
+  const current =
+    authored?.toClipId === pair.to.id &&
+    (!authored.fromClipId || authored.fromClipId === pair.from.id)
+      ? authored
+      : null;
+  const currentFeedback =
+    feedback &&
+    (feedback.transitionKind === null
+      ? current === null
+      : current?.kind === feedback.transitionKind)
+      ? feedback.message
+      : null;
+  return (
+    <div
+      data-testid="transition-tab"
+      onMouseDown={(event) => event.stopPropagation()}
+      style={{ display: "flex", flexDirection: "column", gap: "var(--space-md)", padding: "var(--space-md)" }}
+    >
+      <div style={{ color: "var(--text-secondary)", fontSize: "var(--fs-xs)" }}>
+        {pair.from.id} → {pair.to.id}
+      </div>
+      <button
+        type="button"
+        aria-pressed={current?.kind === "crossDissolve"}
+        onClick={() => void update("crossDissolve")}
+        disabled={pending}
+        style={{
+          display: "flex",
+          alignItems: "center",
+          gap: "var(--space-sm)",
+          padding: "var(--space-sm-md)",
+          borderRadius: "var(--radius-md)",
+          border:
+            current?.kind === "crossDissolve"
+              ? "var(--bw-thin) solid var(--accent-primary)"
+              : "var(--bw-thin) solid var(--border-primary)",
+          background: "var(--bg-raised)",
+          color: "var(--text-primary)",
+          textAlign: "left",
+        }}
+      >
+        <Icon icon={Blend} size={16} />
+        <span>
+          <strong style={{ display: "block", fontSize: "var(--fs-sm)" }}>
+            {t("media.transition.crossDissolve")}
+          </strong>
+          <span style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+            {t("media.transition.crossDissolveDescription")}
+          </span>
+        </span>
+      </button>
+
+      <label style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
+        <span style={{ color: "var(--text-tertiary)", fontSize: "var(--fs-xs)" }}>
+          {t("media.transition.duration", {
+            frames: durationFrames,
+            seconds: (durationFrames / Math.max(1, timeline.fps)).toFixed(2),
+          })}
+        </span>
+        <input
+          type="range"
+          min={1}
+          max={pair.maximumDurationFrames}
+          value={durationFrames}
+          onChange={(event) => setDurationFrames(Number(event.target.value))}
+          disabled={pending}
+          aria-label={t("media.transition.durationLabel")}
+        />
+      </label>
+
+      <div style={{ display: "flex", gap: "var(--space-xs)" }}>
+        <button
+          type="button"
+          data-action="apply-transition"
+          disabled={pending}
+          onClick={() => void update("crossDissolve")}
+          style={primaryButtonStyle}
+        >
+          <Icon icon={Blend} size={12} />
+          {pending ? t("media.transition.applying") : t("media.transition.apply")}
+        </button>
+        {current && (
+          <button
+            type="button"
+            data-action="remove-transition"
+            disabled={pending}
+            onClick={() => void update(null)}
+            style={secondaryButtonStyle}
+          >
+            <Icon icon={Trash2} size={12} />
+            {t("media.transition.remove")}
+          </button>
+        )}
+      </div>
+      {currentFeedback && <div role="status" style={{ color: "var(--status-success)", fontSize: "var(--fs-xs)" }}>{currentFeedback}</div>}
+      {error && <div role="alert" style={{ color: "var(--status-error)", fontSize: "var(--fs-xs)" }}>{error}</div>}
+    </div>
+  );
+}
+
+const primaryButtonStyle = {
+  display: "inline-flex",
+  alignItems: "center",
+  gap: 4,
+  minHeight: 24,
+  padding: "2px var(--space-sm)",
+  borderRadius: "var(--radius-sm)",
+  border: "none",
+  background: "var(--accent-primary)",
+  color: "#111",
+  fontSize: "var(--fs-xs)",
+  fontWeight: "var(--fw-semibold)",
+} as const;
+
+const secondaryButtonStyle = {
+  ...primaryButtonStyle,
+  border: "var(--bw-thin) solid var(--border-primary)",
+  background: "var(--bg-prominent)",
+  color: "var(--text-primary)",
+} as const;
diff --git a/web/src/components/preview/CropOverlay.tsx b/web/src/components/preview/CropOverlay.tsx
index 993e7f51..fa7dfe99 100644
--- a/web/src/components/preview/CropOverlay.tsx
+++ b/web/src/components/preview/CropOverlay.tsx
@@ -297,7 +297,7 @@ export function CropOverlay({
           top: rect.top,
           width: rect.width,
           height: rect.height,
-          cursor: "grab",
+          cursor: dragCrop ? "grabbing" : "grab",
           pointerEvents: "auto",
         }}
       />
diff --git a/web/src/components/preview/MotionTrackingOverlay.test.ts b/web/src/components/preview/MotionTrackingOverlay.test.ts
new file mode 100644
index 00000000..acf2cf7b
--- /dev/null
+++ b/web/src/components/preview/MotionTrackingOverlay.test.ts
@@ -0,0 +1,28 @@
+import { describe, expect, it } from "vitest";
+import { normalizedMotionRegion } from "./MotionTrackingOverlay";
+
+describe("normalizedMotionRegion", () => {
+  it("normalizes_reverse_drags_and_clamps_them_to_the_preview", () => {
+    expect(normalizedMotionRegion({ x: 0.8, y: 0.7 }, { x: 0.2, y: 0.1 })).toEqual({
+      x: 0.2,
+      y: 0.1,
+      width: 0.6000000000000001,
+      height: 0.6,
+    });
+    expect(normalizedMotionRegion({ x: -1, y: -1 }, { x: 2, y: 2 })).toEqual({
+      x: 0,
+      y: 0,
+      width: 1,
+      height: 1,
+    });
+  });
+
+  it("keeps_clicks_as_a_non_empty_trackable_region", () => {
+    expect(normalizedMotionRegion({ x: 1, y: 1 }, { x: 1, y: 1 })).toEqual({
+      x: 0.98,
+      y: 0.98,
+      width: 0.02,
+      height: 0.02,
+    });
+  });
+});
diff --git a/web/src/components/preview/MotionTrackingOverlay.tsx b/web/src/components/preview/MotionTrackingOverlay.tsx
new file mode 100644
index 00000000..938744ca
--- /dev/null
+++ b/web/src/components/preview/MotionTrackingOverlay.tsx
@@ -0,0 +1,99 @@
+import { useEffect, useRef, useState } from "react";
+import { useT } from "../../i18n";
+import type { MotionTrackingRegion } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+
+const MIN_SIZE = 0.02;
+
+function clamp(value: number): number {
+  return Math.max(0, Math.min(1, value));
+}
+
+export function normalizedMotionRegion(
+  start: { x: number; y: number },
+  end: { x: number; y: number },
+): MotionTrackingRegion {
+  const left = clamp(Math.min(start.x, end.x));
+  const top = clamp(Math.min(start.y, end.y));
+  const right = clamp(Math.max(start.x, end.x));
+  const bottom = clamp(Math.max(start.y, end.y));
+  return {
+    x: Math.min(left, 1 - MIN_SIZE),
+    y: Math.min(top, 1 - MIN_SIZE),
+    width: Math.max(MIN_SIZE, right - left),
+    height: Math.max(MIN_SIZE, bottom - top),
+  };
+}
+
+export function MotionTrackingOverlay({ canvasPx }: {
+  canvasPx: { width: number; height: number };
+}) {
+  const t = useT();
+  const selection = useEditorUiStore((state) => state.motionTrackingSelection);
+  const setRegion = useEditorUiStore((state) => state.setMotionTrackingRegion);
+  const [draft, setDraft] = useState<MotionTrackingRegion | null>(null);
+  const cleanupRef = useRef<(() => void) | null>(null);
+
+  useEffect(() => () => cleanupRef.current?.(), []);
+  if (!selection || canvasPx.width <= 0 || canvasPx.height <= 0) return null;
+  const region = draft ?? selection.region;
+
+  function begin(event: React.PointerEvent<HTMLDivElement>) {
+    event.preventDefault();
+    event.stopPropagation();
+    const bounds = event.currentTarget.getBoundingClientRect();
+    if (bounds.width <= 0 || bounds.height <= 0) return;
+    const start = {
+      x: clamp((event.clientX - bounds.left) / bounds.width),
+      y: clamp((event.clientY - bounds.top) / bounds.height),
+    };
+    let latest = normalizedMotionRegion(start, start);
+    setDraft(latest);
+    const move = (next: PointerEvent) => {
+      latest = normalizedMotionRegion(start, {
+        x: (next.clientX - bounds.left) / bounds.width,
+        y: (next.clientY - bounds.top) / bounds.height,
+      });
+      setDraft(latest);
+    };
+    const finish = () => {
+      window.removeEventListener("pointermove", move);
+      window.removeEventListener("pointerup", finish);
+      window.removeEventListener("pointercancel", finish);
+      cleanupRef.current = null;
+      setDraft(null);
+      setRegion(latest);
+    };
+    window.addEventListener("pointermove", move);
+    window.addEventListener("pointerup", finish);
+    window.addEventListener("pointercancel", finish);
+    cleanupRef.current = finish;
+  }
+
+  return (
+    <div
+      data-testid="motion-tracking-overlay"
+      aria-label={t("inspector.motionTracking.previewRegionLabel")}
+      onPointerDown={begin}
+      style={{ position: "absolute", inset: 0, zIndex: 8, cursor: "crosshair", touchAction: "none" }}
+    >
+      <div
+        style={{
+          position: "absolute",
+          left: `${region.x * 100}%`,
+          top: `${region.y * 100}%`,
+          width: `${region.width * 100}%`,
+          height: `${region.height * 100}%`,
+          border: "2px solid var(--accent-primary)",
+          background: "color-mix(in srgb, var(--accent-primary) 12%, transparent)",
+          boxShadow: "0 0 0 1px rgba(0,0,0,0.65)",
+          pointerEvents: "none",
+        }}
+      >
+        <span style={{ position: "absolute", left: 4, top: 3, color: "white", fontSize: "var(--fs-xxs)", textShadow: "0 1px 2px black" }}>
+          {t("inspector.motionTracking.subject")}
+        </span>
+      </div>
+    </div>
+  );
+}
diff --git a/web/src/components/preview/PolygonMaskOverlay.test.tsx b/web/src/components/preview/PolygonMaskOverlay.test.tsx
new file mode 100644
index 00000000..ef01d4cf
--- /dev/null
+++ b/web/src/components/preview/PolygonMaskOverlay.test.tsx
@@ -0,0 +1,110 @@
+// @vitest-environment happy-dom
+
+import React from "react";
+import { act } from "react";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import type { Clip } from "../../lib/types";
+
+const setMasks = vi.hoisted(() => vi.fn());
+
+vi.mock("../../store/editActions", () => ({ setMasks }));
+
+import {
+  inverseMaskDelta,
+  PolygonMaskOverlay,
+  transformMaskPoint,
+} from "./PolygonMaskOverlay";
+
+function clip(): Clip {
+  return {
+    id: "clip",
+    mediaRef: "asset",
+    mediaType: "video",
+    sourceClipType: "video",
+    startFrame: 0,
+    durationFrames: 100,
+    trimStartFrame: 0,
+    trimEndFrame: 0,
+    speed: 1,
+    volume: 1,
+    fadeInFrames: 0,
+    fadeOutFrames: 0,
+    fadeInInterpolation: "linear",
+    fadeOutInterpolation: "linear",
+    opacity: 1,
+    transform: {
+      centerX: 0.5,
+      centerY: 0.5,
+      width: 1,
+      height: 1,
+      rotation: 0,
+      flipHorizontal: false,
+      flipVertical: false,
+    },
+    crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    masks: [
+      {
+        shape: {
+          kind: "poly",
+          points: [
+            { x: 0.2, y: 0.2 },
+            { x: 0.8, y: 0.2 },
+            { x: 0.5, y: 0.8 },
+          ],
+        },
+        feather: 0.1,
+        invert: false,
+        transform: {
+          offset: { x: 0.1, y: -0.05 },
+          scale: { x: 2, y: 0.5 },
+          rotationDegrees: 90,
+        },
+      },
+    ],
+  };
+}
+
+afterEach(() => {
+  document.body.replaceChildren();
+  setMasks.mockReset();
+});
+
+describe("PolygonMaskOverlay", () => {
+  it("uses the renderer's center-relative mask transform", () => {
+    const transform = clip().masks?.[0]?.transform;
+    expect(transformMaskPoint({ x: 0.75, y: 0.5 }, transform)).toEqual({
+      x: 0.6,
+      y: 0.95,
+    });
+    const delta = inverseMaskDelta({ x: 0, y: 0.2 }, transform);
+    expect(delta.x).toBeCloseTo(0.1);
+    expect(delta.y).toBeCloseTo(0);
+  });
+
+  it("renders every polygon point and commits one undoable mask edit on release", async () => {
+    const container = document.createElement("div");
+    document.body.append(container);
+    const root = createRoot(container);
+    await act(async () =>
+      root.render(<PolygonMaskOverlay clip={clip()} canvasPx={{ width: 1000, height: 500 }} />),
+    );
+
+    expect(container.querySelector('[data-testid="polygon-mask-overlay"]')).not.toBeNull();
+    expect(container.querySelectorAll("circle")).toHaveLength(3);
+
+    const point = container.querySelector('[data-testid="polygon-mask-point-0"]');
+    await act(async () => {
+      point?.dispatchEvent(new PointerEvent("pointerdown", { bubbles: true, clientX: 100, clientY: 100 }));
+      window.dispatchEvent(new PointerEvent("pointermove", { clientX: 100, clientY: 200 }));
+      window.dispatchEvent(new PointerEvent("pointerup"));
+    });
+
+    expect(setMasks).toHaveBeenCalledTimes(1);
+    const committed = setMasks.mock.calls[0]?.[1]?.[0];
+    expect(committed.shape.points[0].x).toBeCloseTo(0.3);
+    expect(committed.shape.points[0].y).toBeCloseTo(0.2);
+    expect(committed.feather).toBe(0.1);
+    await act(async () => root.unmount());
+  });
+});
diff --git a/web/src/components/preview/PolygonMaskOverlay.tsx b/web/src/components/preview/PolygonMaskOverlay.tsx
new file mode 100644
index 00000000..fdbe4447
--- /dev/null
+++ b/web/src/components/preview/PolygonMaskOverlay.tsx
@@ -0,0 +1,161 @@
+/** On-canvas point editing for the first polygon mask on the selected clip. */
+
+import { useEffect, useRef, useState } from "react";
+import * as edit from "../../store/editActions";
+import type { Clip, Mask, MaskTransform, Point2 } from "../../lib/types";
+
+const HANDLE_RADIUS = 5;
+const OUTLINE = "rgba(255,255,255,0.85)";
+const HANDLE_FILL = "var(--accent-primary)";
+
+function completeTransform(transform: Mask["transform"]): MaskTransform {
+  return {
+    offset: transform?.offset ?? { x: 0, y: 0 },
+    scale: transform?.scale ?? { x: 1, y: 1 },
+    rotationDegrees: transform?.rotationDegrees ?? 0,
+  };
+}
+
+/** Apply the same center-relative transform used by the Rust CPU/GPU mask path. */
+export function transformMaskPoint(point: Point2, transform: Mask["transform"]): Point2 {
+  const complete = completeTransform(transform);
+  const radians = (complete.rotationDegrees * Math.PI) / 180;
+  const x = (point.x - 0.5) * complete.scale.x;
+  const y = (point.y - 0.5) * complete.scale.y;
+  return {
+    x: x * Math.cos(radians) - y * Math.sin(radians) + 0.5 + complete.offset.x,
+    y: x * Math.sin(radians) + y * Math.cos(radians) + 0.5 + complete.offset.y,
+  };
+}
+
+/** Convert a display-space drag delta back into the polygon's local coordinates. */
+export function inverseMaskDelta(delta: Point2, transform: Mask["transform"]): Point2 {
+  const complete = completeTransform(transform);
+  const radians = (-complete.rotationDegrees * Math.PI) / 180;
+  const x = delta.x * Math.cos(radians) - delta.y * Math.sin(radians);
+  const y = delta.x * Math.sin(radians) + delta.y * Math.cos(radians);
+  return {
+    x: x / Math.max(Math.abs(complete.scale.x), 0.0001),
+    y: y / Math.max(Math.abs(complete.scale.y), 0.0001),
+  };
+}
+
+export function PolygonMaskOverlay({
+  clip,
+  canvasPx,
+}: {
+  clip: Clip;
+  canvasPx: { width: number; height: number };
+}) {
+  const mask = clip.masks?.[0];
+  const polygon = mask?.shape.kind === "poly" ? mask.shape : null;
+  const [dragPoints, setDragPoints] = useState<Point2[] | null>(null);
+  const dragPointsRef = useRef<Point2[] | null>(null);
+  const cleanupRef = useRef<(() => void) | null>(null);
+
+  useEffect(() => {
+    setDragPoints(null);
+    dragPointsRef.current = null;
+  }, [clip.id, polygon]);
+
+  useEffect(
+    () => () => {
+      cleanupRef.current?.();
+      cleanupRef.current = null;
+    },
+    [],
+  );
+
+  if (
+    !mask ||
+    !polygon ||
+    polygon.points.length < 3 ||
+    !Number.isFinite(canvasPx.width) ||
+    !Number.isFinite(canvasPx.height) ||
+    canvasPx.width <= 0 ||
+    canvasPx.height <= 0
+  ) {
+    return null;
+  }
+
+  const points = dragPoints ?? polygon.points;
+  const displayPoints = points.map((point) => transformMaskPoint(point, mask.transform));
+
+  const beginPointDrag = (event: React.PointerEvent, index: number) => {
+    event.preventDefault();
+    event.stopPropagation();
+    const startClient = { x: event.clientX, y: event.clientY };
+    const startPoints = polygon.points.map((point) => ({ ...point }));
+    const onMove = (nextEvent: PointerEvent) => {
+      const localDelta = inverseMaskDelta(
+        {
+          x: (nextEvent.clientX - startClient.x) / canvasPx.width,
+          y: (nextEvent.clientY - startClient.y) / canvasPx.height,
+        },
+        mask.transform,
+      );
+      const nextPoints = startPoints.map((point, pointIndex) =>
+        pointIndex === index
+          ? {
+              x: Math.max(0, Math.min(1, point.x + localDelta.x)),
+              y: Math.max(0, Math.min(1, point.y + localDelta.y)),
+            }
+          : point,
+      );
+      dragPointsRef.current = nextPoints;
+      setDragPoints(nextPoints);
+    };
+    const finish = () => {
+      window.removeEventListener("pointermove", onMove);
+      window.removeEventListener("pointerup", finish);
+      cleanupRef.current = null;
+      const committed = dragPointsRef.current;
+      dragPointsRef.current = null;
+      setDragPoints(null);
+      if (committed) {
+        void edit.setMasks(
+          [clip.id],
+          [{ ...mask, shape: { kind: "poly", points: committed } }, ...(clip.masks?.slice(1) ?? [])],
+        );
+      }
+    };
+    window.addEventListener("pointermove", onMove);
+    window.addEventListener("pointerup", finish);
+    cleanupRef.current = () => {
+      window.removeEventListener("pointermove", onMove);
+      window.removeEventListener("pointerup", finish);
+    };
+  };
+
+  return (
+    <svg
+      data-testid="polygon-mask-overlay"
+      width={canvasPx.width}
+      height={canvasPx.height}
+      viewBox={`0 0 ${canvasPx.width} ${canvasPx.height}`}
+      style={{ position: "absolute", inset: 0, zIndex: 5, overflow: "visible", pointerEvents: "none" }}
+    >
+      <polygon
+        points={displayPoints.map((point) => `${point.x * canvasPx.width},${point.y * canvasPx.height}`).join(" ")}
+        fill="rgba(255,255,255,0.08)"
+        stroke={OUTLINE}
+        strokeWidth={1}
+        vectorEffect="non-scaling-stroke"
+      />
+      {displayPoints.map((point, index) => (
+        <circle
+          key={index}
+          data-testid={`polygon-mask-point-${index}`}
+          cx={point.x * canvasPx.width}
+          cy={point.y * canvasPx.height}
+          r={HANDLE_RADIUS}
+          fill={HANDLE_FILL}
+          stroke={OUTLINE}
+          strokeWidth={1}
+          style={{ cursor: "move", pointerEvents: "auto" }}
+          onPointerDown={(event) => beginPointDrag(event, index)}
+        />
+      ))}
+    </svg>
+  );
+}
diff --git a/web/src/components/preview/Preview.interaction.test.tsx b/web/src/components/preview/Preview.interaction.test.tsx
new file mode 100644
index 00000000..5dbe82d8
--- /dev/null
+++ b/web/src/components/preview/Preview.interaction.test.tsx
@@ -0,0 +1,120 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { ScrubBar } from "./Preview";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let container: HTMLDivElement;
+let root: Root;
+let onSeek: ReturnType<typeof vi.fn>;
+let onScrubbingChange: ReturnType<typeof vi.fn>;
+let setPointerCapture: ReturnType<typeof vi.spyOn>;
+
+beforeEach(() => {
+  onSeek = vi.fn();
+  onScrubbingChange = vi.fn();
+  setPointerCapture = vi.spyOn(HTMLElement.prototype, "setPointerCapture")
+    .mockImplementation(() => {});
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  act(() => {
+    root.render(
+      <ScrubBar
+        ariaLabel="Preview playhead"
+        frame={25}
+        total={100}
+        onSeek={onSeek}
+        onScrubbingChange={onScrubbingChange}
+      />,
+    );
+  });
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  vi.restoreAllMocks();
+});
+
+it("control-200c9fd6ec3f0f35 pointer scrub preview playhead", async () => {
+  const scrub = container.querySelector<HTMLElement>("[data-preview-scrub]");
+  expect(scrub?.getAttribute("role")).toBe("slider");
+  expect(scrub?.tabIndex).toBe(0);
+  expect(scrub?.getAttribute("aria-label")).toBe("Preview playhead");
+  expect(scrub?.getAttribute("aria-valuemin")).toBe("0");
+  expect(scrub?.getAttribute("aria-valuemax")).toBe("100");
+  expect(scrub?.getAttribute("aria-valuenow")).toBe("25");
+  scrub!.getBoundingClientRect = () =>
+    ({ left: 100, width: 200, right: 300, top: 0, bottom: 18, height: 18 }) as DOMRect;
+
+  const track = container.querySelector<HTMLElement>("[data-preview-scrub-track]");
+  expect(track?.style.height).toBe("3px");
+  await act(async () => scrub?.dispatchEvent(new MouseEvent("mouseover", { bubbles: true })));
+  expect(track?.style.height).toBe("4px");
+  expect(onSeek).not.toHaveBeenCalled();
+  expect(onScrubbingChange).not.toHaveBeenCalled();
+
+  await act(async () => {
+    scrub?.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 7,
+      clientX: 150,
+    }));
+  });
+  expect(setPointerCapture).toHaveBeenCalledWith(7);
+  expect(onScrubbingChange).toHaveBeenLastCalledWith(true);
+  expect(onSeek).toHaveBeenLastCalledWith(25);
+
+  onSeek.mockClear();
+  await act(async () => {
+    scrub?.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 7,
+      buttons: 0,
+      clientX: 200,
+    }));
+  });
+  expect(onSeek).not.toHaveBeenCalled();
+
+  await act(async () => {
+    scrub?.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 7,
+      buttons: 1,
+      clientX: 200,
+    }));
+    scrub?.dispatchEvent(new PointerEvent("pointerup", {
+      bubbles: true,
+      pointerId: 7,
+      clientX: 250,
+    }));
+  });
+  expect(onSeek.mock.calls).toEqual([[50], [75]]);
+  expect(onScrubbingChange).toHaveBeenLastCalledWith(false);
+
+  onScrubbingChange.mockClear();
+  await act(async () => {
+    scrub?.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 8,
+      clientX: 160,
+    }));
+  });
+  await act(async () => scrub?.dispatchEvent(new Event("lostpointercapture", { bubbles: true })));
+  expect(onScrubbingChange.mock.calls).toEqual([[true], [false]]);
+
+  onSeek.mockClear();
+  scrub?.focus();
+  await act(async () => {
+    scrub?.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowRight", bubbles: true }));
+    scrub?.dispatchEvent(new KeyboardEvent("keydown", { key: "Home", bubbles: true }));
+    scrub?.dispatchEvent(new KeyboardEvent("keydown", { key: "End", bubbles: true }));
+  });
+  expect(onSeek.mock.calls).toEqual([[26], [0], [100]]);
+  expect(document.activeElement).toBe(scrub);
+});
diff --git a/web/src/components/preview/Preview.tsx b/web/src/components/preview/Preview.tsx
index 3461a422..74ee988d 100644
--- a/web/src/components/preview/Preview.tsx
+++ b/web/src/components/preview/Preview.tsx
@@ -21,6 +21,7 @@ import { Icon } from "../ui/Icon";
 import { useProjectStore } from "../../store/projectStore";
 import { useEditorUiStore } from "../../store/uiStore";
 import { useMediaStore, refreshMedia } from "../../store/mediaStore";
+import { useSettingsStore } from "../../store/settingsStore";
 import { formatTimecode, totalFrames } from "../../lib/geometry";
 import { snapFrameToEdge } from "../../lib/snap";
 import { maybeSnapFeedback } from "../../lib/haptic";
@@ -28,6 +29,8 @@ import { assetUrl } from "../../lib/asset";
 import { TimelinePlayback } from "./TimelinePlaybackLayer";
 import { TransformOverlay } from "./TransformOverlay";
 import { CropOverlay } from "./CropOverlay";
+import { PolygonMaskOverlay } from "./PolygonMaskOverlay";
+import { MotionTrackingOverlay } from "./MotionTrackingOverlay";
 import {
   CANVAS_OUTLINE_COLOR,
   aspectFitBox,
@@ -72,7 +75,12 @@ import { createScrubGesture, transitionScrubGesture } from "./scrubGesture";
 
 export function Preview() {
   const t = useT();
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
   const projectEpoch = useProjectStore((s) => s.projectEpoch);
   const timelineVersion = useProjectStore((s) => s.timelineVersion);
   const activeFrame = useEditorUiStore((s) => s.activeFrame);
@@ -91,6 +99,7 @@ export function Preview() {
   const togglePlayTimeline = useEditorUiStore((s) => s.togglePlay);
   const previewMediaId = useEditorUiStore((s) => s.previewMediaId);
   const selectedClipIds = useEditorUiStore((s) => s.selectedClipIds);
+  const motionTrackingSelection = useEditorUiStore((s) => s.motionTrackingSelection);
   const pushToast = useEditorUiStore((s) => s.pushToast);
   const mediaPanelCurrentFolderId = useEditorUiStore((s) => s.mediaPanelCurrentFolderId);
   // Preview canvas zoom + pan (Item 1). Read here and applied to the timeline
@@ -215,7 +224,7 @@ export function Preview() {
   const activeShownFrame = previewing ? Math.round(mediaTime * fps) : activeFrame;
   const playing = previewing ? mediaPlaying : isPlaying;
   const playbackRoute = resolveTimelinePlaybackRoute(timeline, {
-    rustAvailable: isTauri,
+    rustAvailable: isTauri && !activeNestedSequenceId,
     rustEnabled: rustEngineEnabled() && !rustEngineFailed,
     forceRust:
       webkitPlaybackFailedRevision === `${projectEpoch}:${timelineVersion}`,
@@ -229,10 +238,10 @@ export function Preview() {
   const requestCompositeStill = useCallback(
     (request: Parameters<typeof compositeFrame>[0]) =>
       compositeFrame(
-        request,
+        { ...request, sequenceId: activeNestedSequenceId ?? undefined },
         previewQualityMaxSize(previewQualityShortEdge, timeline.width, timeline.height),
       ),
-    [previewQualityShortEdge, timeline.height, timeline.width],
+    [activeNestedSequenceId, previewQualityShortEdge, timeline.height, timeline.width],
   );
 
   const seekTo = (frame: number) => {
@@ -457,7 +466,9 @@ export function Preview() {
                     unconditional `if editor.cropEditingActive` swap). Overlays get
                     the SCALED canvas box (fittedCanvas × canvasZoom) so their
                     placement + pointer math track the zoomed canvas (invariant). */}
-                {cropEditingActive
+                {motionTrackingSelection?.clipId === transformClip?.id && scaledCanvas
+                  ? <MotionTrackingOverlay canvasPx={scaledCanvas} />
+                  : cropEditingActive
                   ? cropClip &&
                     scaledCanvas && (
                       <CropOverlay
@@ -466,14 +477,17 @@ export function Preview() {
                         sourcePixelAspect={cropSourcePixelAspect}
                       />
                     )
-                  : transformClip &&
-                    scaledCanvas && (
-                      <TransformOverlay
-                        clip={transformClip}
-                        canvasPx={scaledCanvas}
-                        mediaAspect={transformMediaAspect}
-                      />
-                    )}
+                  : transformClip && scaledCanvas
+                    ? transformClip.masks?.[0]?.shape.kind === "poly"
+                      ? <PolygonMaskOverlay clip={transformClip} canvasPx={scaledCanvas} />
+                      : (
+                          <TransformOverlay
+                            clip={transformClip}
+                            canvasPx={scaledCanvas}
+                            mediaAspect={transformMediaAspect}
+                          />
+                        )
+                    : null}
               </>
             ) : (
               // Empty timeline: a framed 16:9 canvas surface placeholder.
@@ -500,6 +514,7 @@ export function Preview() {
           both the timeline composite and (via mediaRef) single-media preview, so
           the <video>/<audio> renders without its native controls. */}
       <ScrubBar
+        ariaLabel={t("preview.scrubBar")}
         frame={activeShownFrame}
         total={total}
         onSeek={seekTo}
@@ -608,7 +623,9 @@ function MediaPreview({
   onPlayingChange: (playing: boolean) => void;
 }) {
   const t = useT();
-  const url = assetUrl(item.path);
+  const proxyPlaybackEnabled = useSettingsStore((state) => state.proxyPlaybackEnabled);
+  const playbackPath = proxyPlaybackEnabled ? (item.proxyPath ?? item.path) : item.path;
+  const url = assetUrl(playbackPath);
   // Hi-res first-frame poster, painted INSTANTLY behind the <video> so a cold
   // click shows a sharp frame with no blank/spinner. Decoded (and cached) by the
   // backend on select; the asset protocol then streams the real video
@@ -730,12 +747,14 @@ function PreviewTabs({ item }: { item: MediaItem | null }) {
   );
 }
 
-function ScrubBar({
+export function ScrubBar({
+  ariaLabel,
   frame,
   total,
   onSeek,
   onScrubbingChange,
 }: {
+  ariaLabel: string;
   frame: number;
   total: number;
   onSeek: (f: number) => void;
@@ -746,7 +765,9 @@ function ScrubBar({
   const ref = useRef<HTMLDivElement>(null);
   const gestureRef = useRef(createScrubGesture());
   const [hover, setHover] = useState(false);
-  const progress = total > 0 ? frame / total : 0;
+  const safeTotal = Math.max(0, total);
+  const safeFrame = Math.max(0, Math.min(safeTotal, Math.round(frame)));
+  const progress = safeTotal > 0 ? safeFrame / safeTotal : 0;
 
   const seekFromEvent = (clientX: number) => {
     const el = ref.current;
@@ -756,13 +777,40 @@ function ScrubBar({
     onSeek(Math.round(t * total));
   };
 
+  const cancelGesture = useCallback(() => {
+    const wasActive = gestureRef.current.active;
+    const transition = transitionScrubGesture(gestureRef.current, "cancel");
+    gestureRef.current = transition.state;
+    if (wasActive) onScrubbingChange?.(transition.scrubbing);
+  }, [onScrubbingChange]);
+
+  useEffect(() => {
+    const element = ref.current;
+    if (!element) return;
+    element.addEventListener("lostpointercapture", cancelGesture);
+    element.addEventListener("pointercancel", cancelGesture);
+    return () => {
+      element.removeEventListener("lostpointercapture", cancelGesture);
+      element.removeEventListener("pointercancel", cancelGesture);
+    };
+  }, [cancelGesture]);
+
   return (
     <div
       ref={ref}
+      data-preview-scrub
+      role="slider"
+      tabIndex={0}
+      aria-label={ariaLabel}
+      aria-orientation="horizontal"
+      aria-valuemin={0}
+      aria-valuemax={safeTotal}
+      aria-valuenow={safeFrame}
       onMouseEnter={() => setHover(true)}
       onMouseLeave={() => setHover(false)}
       onPointerDown={(e) => {
-        (e.target as HTMLElement).setPointerCapture(e.pointerId);
+        e.currentTarget.focus();
+        e.currentTarget.setPointerCapture(e.pointerId);
         const transition = transitionScrubGesture(gestureRef.current, "down");
         gestureRef.current = transition.state;
         onScrubbingChange?.(transition.scrubbing);
@@ -781,10 +829,22 @@ function ScrubBar({
         if (transition.effect === "exact-seek") seekFromEvent(e.clientX);
         onScrubbingChange?.(transition.scrubbing);
       }}
-      onLostPointerCapture={() => {
-        const transition = transitionScrubGesture(gestureRef.current, "cancel");
-        gestureRef.current = transition.state;
-        if (transition.effect !== "none") onScrubbingChange?.(transition.scrubbing);
+      onKeyDown={(e) => {
+        if (e.key === "Escape") {
+          if (gestureRef.current.active) {
+            e.preventDefault();
+            cancelGesture();
+          }
+          return;
+        }
+        let next: number | null = null;
+        if (e.key === "ArrowLeft" || e.key === "ArrowDown") next = safeFrame - 1;
+        if (e.key === "ArrowRight" || e.key === "ArrowUp") next = safeFrame + 1;
+        if (e.key === "Home") next = 0;
+        if (e.key === "End") next = safeTotal;
+        if (next === null || safeTotal <= 0) return;
+        e.preventDefault();
+        onSeek(Math.max(0, Math.min(safeTotal, next)));
       }}
       style={{
         height: 18,
@@ -797,6 +857,7 @@ function ScrubBar({
       }}
     >
       <div
+        data-preview-scrub-track
         style={{
           // position:relative confines the absolute progress fill + handle below.
           // Without it they escape to the nearest positioned ancestor (the preview
diff --git a/web/src/components/preview/TransformOverlay.tsx b/web/src/components/preview/TransformOverlay.tsx
index 50a7d9d4..097fb4e0 100644
--- a/web/src/components/preview/TransformOverlay.tsx
+++ b/web/src/components/preview/TransformOverlay.tsx
@@ -55,7 +55,7 @@ const CORNER_POSITION: Record<TransformResizeCorner, { left: string; top: string
   bottomRight: { left: "100%", top: "100%" },
 };
 
-const CORNER_CURSOR: Record<TransformResizeCorner, string> = {
+export const CORNER_CURSOR: Record<TransformResizeCorner, string> = {
   topLeft: "nwse-resize",
   bottomRight: "nwse-resize",
   topRight: "nesw-resize",
@@ -214,7 +214,7 @@ export function TransformOverlay({
             position: "absolute",
             inset: 0,
             border: `${BORDER_WIDTH}px solid ${BORDER_COLOR}`,
-            cursor: "move",
+            cursor: dragTransform ? "grabbing" : "move",
             pointerEvents: "auto",
           }}
         />
diff --git a/web/src/components/preview/playbackRoute.test.ts b/web/src/components/preview/playbackRoute.test.ts
index 97bdf9ad..817a0e4a 100644
--- a/web/src/components/preview/playbackRoute.test.ts
+++ b/web/src/components/preview/playbackRoute.test.ts
@@ -137,7 +137,7 @@ describe("resolveTimelinePlaybackRoute", () => {
     ).toBe("webkit");
   });
 
-  it("routes text color chroma and supported masks to Rust", () => {
+  it("routes text color chroma stabilization and supported masks to Rust", () => {
     const text = clip({ id: "text", mediaType: "text", sourceClipType: "text" });
     const color = clip({
       id: "color",
@@ -178,7 +178,21 @@ describe("resolveTimelinePlaybackRoute", () => {
         },
       ],
     });
-    for (const item of [text, color, chroma, masks]) {
+    const stabilization = clip({
+      id: "stabilization",
+      stabilization: {
+        model: "opentake.motion-smoothing",
+        modelVersion: 1,
+        sourceIdentity: "media-1",
+        strength: 1,
+        cropMargin: 0,
+        keyframes: [
+          { frame: 0, translationX: 0, translationY: 0, rotationDegrees: 0 },
+          { frame: 89, translationX: 0.01, translationY: 0, rotationDegrees: 0 },
+        ],
+      },
+    });
+    for (const item of [text, color, chroma, stabilization, masks]) {
       expect(resolveTimelinePlaybackRoute(timeline(item), runtime)).toEqual({
         kind: "rust",
         reasons: [],
@@ -233,22 +247,41 @@ describe("resolveTimelinePlaybackRoute", () => {
     }
   });
 
-  it("returns Unsupported for Lottie enabled effects polygon masks and mask overflow", () => {
+  it("routes polygon masks through the native compositor", () => {
+    const polygon = clip({
+      masks: [
+        {
+          shape: {
+            kind: "poly",
+            points: [
+              { x: 0.2, y: 0.2 },
+              { x: 0.8, y: 0.2 },
+              { x: 0.5, y: 0.8 },
+            ],
+          },
+          feather: 0.1,
+          invert: false,
+        },
+      ],
+    });
+
+    expect(resolveTimelinePlaybackRoute(timeline(polygon), runtime)).toEqual({
+      kind: "rust",
+      reasons: [],
+    });
+  });
+
+  it("routes advertised effects through Rust and rejects unknown persisted effects", () => {
+    expect(
+      resolveTimelinePlaybackRoute(
+        timeline(clip({ effects: [{ name: "sepia", params: {}, enabled: true }] })),
+        runtime,
+      ),
+    ).toEqual({ kind: "rust", reasons: [] });
+
     const cases: Array<[Clip, string]> = [
       [clip({ mediaType: "lottie", sourceClipType: "lottie" }), "lottie"],
-      [clip({ effects: [{ name: "blur", params: {}, enabled: true }] }), "enabled-effect"],
-      [
-        clip({
-          masks: [
-            {
-              shape: { kind: "poly", points: [{ x: 0, y: 0 }, { x: 1, y: 1 }] },
-              feather: 0,
-              invert: false,
-            },
-          ],
-        }),
-        "polygon-mask",
-      ],
+      [clip({ effects: [{ name: "blur", params: {}, enabled: true }] }), "unknown-effect"],
       [
         clip({
           masks: Array.from({ length: 5 }, () => ({
diff --git a/web/src/components/preview/playbackRoute.ts b/web/src/components/preview/playbackRoute.ts
index e3c8fcdf..2ef38a28 100644
--- a/web/src/components/preview/playbackRoute.ts
+++ b/web/src/components/preview/playbackRoute.ts
@@ -1,4 +1,5 @@
 import type { Clip, Timeline } from "../../lib/types";
+import { isAdvertisedEffectName } from "../../lib/effects";
 
 export interface PlaybackRouteRuntime {
   rustAvailable: boolean;
@@ -9,8 +10,7 @@ export interface PlaybackRouteRuntime {
 
 export type UnsupportedPlaybackReason =
   | { code: "lottie"; clipId: string }
-  | { code: "enabled-effect"; clipId: string; effect: string }
-  | { code: "polygon-mask"; clipId: string }
+  | { code: "unknown-effect"; clipId: string; effect: string }
   | { code: "mask-overflow"; clipId: string; count: number; limit: 4 }
   | { code: "composited-reverse"; clipId: string }
   | { code: "composited-speed"; clipId: string; speed: number }
@@ -46,26 +46,27 @@ function inspectClip(
   reasons: UnsupportedPlaybackReason[],
 ): ClipCapabilities {
   const masks = clip.masks ?? [];
-  const enabledEffects = (clip.effects ?? []).filter((effect) => effect.enabled);
+  const effects = clip.effects ?? [];
+  const enabledEffects = effects.filter((effect) => effect.enabled);
   const isLottie = clip.mediaType === "lottie" || clip.sourceClipType === "lottie";
   const needsRust =
     clip.mediaType === "text" ||
     clip.sourceClipType === "text" ||
     clip.colorGrade !== undefined ||
     clip.chromaKey !== undefined ||
-    masks.length > 0;
+    clip.stabilization !== undefined ||
+    masks.length > 0 ||
+    enabledEffects.length > 0;
 
   if (isLottie) reasons.push({ code: "lottie", clipId: clip.id });
-  for (const effect of enabledEffects) {
-    reasons.push({ code: "enabled-effect", clipId: clip.id, effect: effect.name });
+  for (const effect of effects) {
+    if (!isAdvertisedEffectName(effect.name)) {
+      reasons.push({ code: "unknown-effect", clipId: clip.id, effect: effect.name });
+    }
   }
   if (masks.length > 4) {
     reasons.push({ code: "mask-overflow", clipId: clip.id, count: masks.length, limit: 4 });
   }
-  if (masks.some((mask) => mask.shape.kind === "poly")) {
-    reasons.push({ code: "polygon-mask", clipId: clip.id });
-  }
-
   return {
     clip,
     needsRust,
diff --git a/web/src/components/settings/SettingsView.tsx b/web/src/components/settings/SettingsView.tsx
index 2942de6a..8237a056 100644
--- a/web/src/components/settings/SettingsView.tsx
+++ b/web/src/components/settings/SettingsView.tsx
@@ -14,6 +14,7 @@ import {
   Check,
   Copy,
   Download,
+  ExternalLink,
   FolderOpen,
   Info,
   Palette,
@@ -32,9 +33,18 @@ import {
   type ByokProvider,
   type WindowSizeOpt,
 } from "../../store/settingsStore";
-import { useEditorUiStore } from "../../store/uiStore";
+import { useEditorUiStore, type SettingsPaneId } from "../../store/uiStore";
 import { openDialog } from "../../lib/dialog";
-import { secretSave, secretLoad, secretDelete } from "../../lib/api";
+import {
+  codexAuthStatus,
+  codexLoginCancel,
+  codexLoginStart,
+  codexLogout,
+  secretSave,
+  secretLoad,
+  secretDelete,
+  type CodexAuthStatus,
+} from "../../lib/api";
 import type { SecretStatus } from "../../lib/types";
 import { AccountPane } from "./AccountPane";
 
@@ -63,21 +73,13 @@ const settingsControlStyle: CSSProperties = {
   border: "none",
 };
 
-type SettingsPaneId =
-  | "general"
-  | "appearance"
-  | "import"
-  | "ai"
-  | "mcp"
-  | "account"
-  | "about";
-
 const SETTINGS_PANES: Array<{ id: SettingsPaneId; icon: typeof SettingsIcon; labelKey: string }> = [
   { id: "general", icon: SettingsIcon, labelKey: "settings.section.general" },
   { id: "appearance", icon: Palette, labelKey: "settings.section.appearance" },
   { id: "import", icon: Download, labelKey: "settings.section.import" },
   { id: "ai", icon: Bot, labelKey: "settings.section.ai" },
   { id: "mcp", icon: Plug, labelKey: "settings.section.mcp" },
+  { id: "shortcuts", icon: Copy, labelKey: "settings.section.shortcuts" },
   { id: "account", icon: User, labelKey: "settings.section.account" },
   { id: "about", icon: Info, labelKey: "settings.section.about" },
 ];
@@ -92,7 +94,8 @@ const settingsSidebarStyle: CSSProperties = {
 export function SettingsView() {
   const t = useT();
   const setSettingsOpen = useEditorUiStore((s) => s.setSettingsOpen);
-  const [activePane, setActivePane] = useState<SettingsPaneId>("general");
+  const activePane = useEditorUiStore((s) => s.settingsPane);
+  const setActivePane = useEditorUiStore((s) => s.setSettingsPane);
 
   return (
     <div
@@ -250,6 +253,8 @@ function renderActivePane(activePane: SettingsPaneId) {
       return <AiPane />;
     case "mcp":
       return <McpPane />;
+    case "shortcuts":
+      return <ShortcutsPane />;
     case "account":
       return <AccountPane />;
     case "about":
@@ -365,6 +370,8 @@ function GeneralPane() {
   const t = useT();
   const locale = useI18nStore((s) => s.locale);
   const setLocale = useI18nStore((s) => s.setLocale);
+  const proxyPlaybackEnabled = useSettingsStore((s) => s.proxyPlaybackEnabled);
+  const setProxyPlaybackEnabled = useSettingsStore((s) => s.setProxyPlaybackEnabled);
   return (
     <Section title={t("settings.section.general")}>
       <Field
@@ -379,6 +386,19 @@ function GeneralPane() {
           />
         }
       />
+      <Field
+        label={t("settings.proxyPlayback")}
+        description={t("settings.proxyPlaybackDesc")}
+        control={
+          <input
+            type="checkbox"
+            role="switch"
+            aria-label={t("settings.proxyPlayback")}
+            checked={proxyPlaybackEnabled}
+            onChange={(event) => setProxyPlaybackEnabled(event.currentTarget.checked)}
+          />
+        }
+      />
     </Section>
   );
 }
@@ -487,6 +507,7 @@ function ImportPane() {
 }
 
 const PROVIDERS: Array<{ id: ByokProvider; label: string }> = [
+  { id: "codex", label: "Codex / ChatGPT" },
   { id: "anthropic", label: "Anthropic" },
   { id: "fal", label: "fal.ai" },
   { id: "replicate", label: "Replicate" },
@@ -511,6 +532,8 @@ function AiPane() {
   const [status, setStatus] = useState<SecretStatus>({ hasKey: false, masked: "" });
   const [busy, setBusy] = useState(false);
   const [error, setError] = useState<string | null>(null);
+  const [codexStatus, setCodexStatus] = useState<CodexAuthStatus | null>(null);
+  const isCodex = provider === "codex";
 
   // Reflect the keychain status for the active provider; reload on switch. The
   // plaintext key is never fetched — only `hasKey` and the masked form.
@@ -518,6 +541,21 @@ function AiPane() {
     let alive = true;
     setDraft("");
     setError(null);
+    if (provider === "codex") {
+      setCodexStatus(null);
+      void codexAuthStatus().then(
+        (next) => {
+          if (alive) setCodexStatus(next);
+        },
+        (reason) => {
+          if (alive) setError(t("settings.codexActionFailed", { error: errorMessage(reason) }));
+        },
+      );
+      return () => {
+        alive = false;
+      };
+    }
+    setCodexStatus(null);
     void secretLoad(provider).then(
       (s) => {
         if (alive) setStatus(s);
@@ -529,7 +567,24 @@ function AiPane() {
     return () => {
       alive = false;
     };
-  }, [provider]);
+  }, [provider, t]);
+
+  useEffect(() => {
+    if (!isCodex || !codexStatus?.loginInProgress) return;
+    let alive = true;
+    const timer = window.setInterval(() => {
+      void codexAuthStatus().then(
+        (next) => {
+          if (alive) setCodexStatus(next);
+        },
+        () => undefined,
+      );
+    }, 1200);
+    return () => {
+      alive = false;
+      window.clearInterval(timer);
+    };
+  }, [codexStatus?.loginInProgress, isCodex]);
 
   const trimmed = draft.trim();
 
@@ -561,17 +616,124 @@ function AiPane() {
     }
   };
 
+  const runCodexAction = async (
+    action: () => Promise<CodexAuthStatus>,
+  ) => {
+    if (busy) return;
+    setBusy(true);
+    setError(null);
+    try {
+      setCodexStatus(await action());
+    } catch (reason) {
+      setError(t("settings.codexActionFailed", { error: errorMessage(reason) }));
+    } finally {
+      setBusy(false);
+    }
+  };
+
   return (
     <Section title={t("settings.section.ai")}>
       <div style={{ fontSize: "var(--fs-sm-md)", color: "var(--text-tertiary)" }}>
-        {t("settings.byokDesc")}
+        {isCodex ? t("settings.codexDesc") : t("settings.byokDesc")}
       </div>
       <Field
         label={t("settings.byokProvider")}
         control={
-          <Segmented<ByokProvider> value={provider} options={PROVIDERS} onChange={setProvider} />
+          <Dropdown<ByokProvider>
+            value={provider}
+            options={PROVIDERS}
+            onChange={setProvider}
+            ariaLabel={t("settings.byokProvider")}
+            minWidth={190}
+          />
         }
       />
+      {isCodex ? (
+        <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-sm)" }}>
+          <div
+            style={{
+              display: "flex",
+              alignItems: "center",
+              justifyContent: "space-between",
+              minHeight: 34,
+              padding: "0 var(--space-sm)",
+              borderRadius: "var(--radius-sm)",
+              ...settingsControlStyle,
+            }}
+          >
+            <div style={{ display: "flex", alignItems: "center", gap: "var(--space-sm)" }}>
+              <span
+                aria-hidden="true"
+                style={{
+                  width: 8,
+                  height: 8,
+                  borderRadius: "50%",
+                  background: codexStatus?.authenticated
+                    ? "var(--status-success)"
+                    : codexStatus?.loginInProgress
+                      ? "var(--accent-primary)"
+                      : "var(--text-tertiary)",
+                }}
+              />
+              <span style={{ fontSize: "var(--fs-sm)", color: "var(--text-primary)" }}>
+                {!codexStatus
+                  ? t("settings.codexChecking")
+                  : !codexStatus.available
+                    ? t("settings.codexUnavailable")
+                    : codexStatus.loginInProgress
+                      ? t("settings.codexWaiting")
+                      : codexStatus.authenticated
+                        ? t("settings.codexSignedIn", {
+                            method: codexStatus.authMethod ?? "ChatGPT",
+                          })
+                        : t("settings.codexSignedOut")}
+              </span>
+            </div>
+            {codexStatus?.version && (
+              <span className="tabular" style={{ fontSize: "var(--fs-xs)", color: "var(--text-tertiary)" }}>
+                {codexStatus.version}
+              </span>
+            )}
+          </div>
+          <div style={{ display: "flex", gap: "var(--space-xs)" }}>
+            {codexStatus?.loginInProgress ? (
+              <button
+                type="button"
+                disabled={busy}
+                onClick={() => void runCodexAction(codexLoginCancel)}
+                className="hover-area"
+                style={{ height: 28, padding: "0 var(--space-lg)", borderRadius: "var(--radius-sm)", ...settingsControlStyle, color: "var(--text-primary)", fontSize: "var(--fs-sm)" }}
+              >
+                {t("settings.codexCancel")}
+              </button>
+            ) : codexStatus?.authenticated ? (
+              <button
+                type="button"
+                disabled={busy}
+                onClick={() => void runCodexAction(codexLogout)}
+                className="hover-area"
+                style={{ height: 28, padding: "0 var(--space-lg)", borderRadius: "var(--radius-sm)", ...settingsControlStyle, color: "var(--text-primary)", fontSize: "var(--fs-sm)" }}
+              >
+                {t("settings.codexLogout")}
+              </button>
+            ) : (
+              <button
+                type="button"
+                disabled={busy || codexStatus?.available === false}
+                onClick={() => void runCodexAction(codexLoginStart)}
+                className="hover-area"
+                style={{ display: "inline-flex", alignItems: "center", gap: "var(--space-xs)", height: 28, padding: "0 var(--space-lg)", borderRadius: "var(--radius-sm)", ...settingsControlStyle, color: "var(--text-primary)", fontSize: "var(--fs-sm)", opacity: busy || codexStatus?.available === false ? 0.4 : 1 }}
+              >
+                <Icon icon={ExternalLink} size={13} />
+                {t("settings.codexLogin")}
+              </button>
+            )}
+          </div>
+          {error && (
+            <div style={{ fontSize: "var(--fs-xs)", color: "var(--status-error)" }}>{error}</div>
+          )}
+        </div>
+      ) : (
       <div style={{ display: "flex", flexDirection: "column", gap: "var(--space-xs)" }}>
         <label style={{ fontSize: "var(--fs-md)", color: "var(--text-primary)" }}>
           {t("settings.byokKey")}
@@ -655,6 +817,7 @@ function AiPane() {
           )
         )}
       </div>
+      )}
     </Section>
   );
 }
@@ -672,6 +835,33 @@ function AboutPane() {
   );
 }
 
+function ShortcutsPane() {
+  const t = useT();
+  const rows = [
+    [t("settings.shortcutsPlay"), "Space"],
+    [t("settings.shortcutsUndo"), "⌘Z"],
+    [t("settings.shortcutsRedo"), "⇧⌘Z"],
+    [t("settings.shortcutsDelete"), "⌫"],
+    [t("settings.shortcutsSave"), "⌘S"],
+    [t("settings.shortcutsNew"), "⌘N"],
+    [t("view.mediaPanel"), "⌘0"],
+    [t("view.inspector"), "⌘⌥0"],
+    [t("view.agentPanel"), "⌘⌥A"],
+    [t("view.maximizeFocused"), "`"],
+    [t("view.layoutDefault"), "⌘1"],
+    [t("view.layoutMedia"), "⌘2"],
+    [t("view.layoutVertical"), "⌘3"],
+    [t("view.enterFullScreen"), "⌘F"],
+  ];
+  return (
+    <Section title={t("settings.section.shortcuts")}>
+      {rows.map(([label, shortcut]) => (
+        <Field key={label} label={label} control={<Value>{shortcut}</Value>} />
+      ))}
+    </Section>
+  );
+}
+
 function Value({ children }: { children: React.ReactNode }) {
   return (
     <span className="tabular" style={{ fontSize: "var(--fs-sm-md)", color: "var(--text-secondary)" }}>
diff --git a/web/src/components/settings/SettingsView.visual.test.ts b/web/src/components/settings/SettingsView.visual.test.ts
index f880c2ee..eb4f7299 100644
--- a/web/src/components/settings/SettingsView.visual.test.ts
+++ b/web/src/components/settings/SettingsView.visual.test.ts
@@ -39,4 +39,12 @@ describe("SettingsView minimal embedded visual direction", () => {
     expect(settingsSource).toContain('labelKey: "settings.section.account"');
     expect(settingsSource).toContain("return <AccountPane />");
   });
+
+  it("supports official Codex ChatGPT login without rendering an API-key field", () => {
+    expect(settingsSource).toContain('{ id: "codex", label: "Codex / ChatGPT" }');
+    expect(settingsSource).toContain("codexAuthStatus");
+    expect(settingsSource).toContain("codexLoginStart");
+    expect(settingsSource).toContain("codexLogout");
+    expect(settingsSource).toContain("isCodex ? (");
+  });
 });
diff --git a/web/src/components/shell/EditorSplit.test.tsx b/web/src/components/shell/EditorSplit.test.tsx
new file mode 100644
index 00000000..140833de
--- /dev/null
+++ b/web/src/components/shell/EditorSplit.test.tsx
@@ -0,0 +1,228 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../media/MediaPanel", () => ({
+  MediaPanel: () => <div data-panel-content="media" />,
+}));
+vi.mock("../preview/Preview", () => ({
+  Preview: () => <div data-panel-content="preview" />,
+}));
+vi.mock("../inspector/Inspector", () => ({
+  Inspector: () => <div data-panel-content="inspector" />,
+}));
+vi.mock("../agent/AgentPanel", () => ({
+  AgentPanel: () => <div data-panel-content="agent" />,
+}));
+vi.mock("../timeline/TimelineRegion", async () => {
+  const React = await import("react");
+  const { PanelShell } = await import("../ui/PanelShell");
+  return {
+    TimelineRegion: () =>
+      React.createElement(
+        PanelShell,
+        { panel: "timeline" },
+        React.createElement("div", { "data-panel-content": "timeline" }),
+      ),
+  };
+});
+
+import { useEditorUiStore, type LayoutPreset, type Panel } from "../../store/uiStore";
+import { useI18nStore } from "../../i18n";
+import { EditorSplit } from "./EditorSplit";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let viewport = { width: 1600, height: 1000 };
+
+class ImmediateResizeObserver implements ResizeObserver {
+  constructor(private readonly callback: ResizeObserverCallback) {}
+
+  observe(target: Element): void {
+    this.callback(
+      [
+        {
+          target,
+          contentRect: {
+            width: viewport.width,
+            height: viewport.height,
+          },
+        } as ResizeObserverEntry,
+      ],
+      this,
+    );
+  }
+
+  disconnect(): void {}
+  unobserve(): void {}
+}
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function panels(): Panel[] {
+  return [...(container?.querySelectorAll<HTMLElement>("[data-editor-panel]") ?? [])].map(
+    (panel) => panel.dataset.editorPanel as Panel,
+  );
+}
+
+async function renderPreset(layoutPreset: LayoutPreset): Promise<void> {
+  await act(async () => {
+    useEditorUiStore.setState({ layoutPreset, maximizedPanel: null });
+    root?.render(<EditorSplit />);
+  });
+}
+
+beforeEach(() => {
+  viewport = { width: 1600, height: 1000 };
+  vi.stubGlobal("ResizeObserver", ImmediateResizeObserver);
+  Object.defineProperties(HTMLElement.prototype, {
+    clientWidth: { configurable: true, get: () => viewport.width },
+    clientHeight: { configurable: true, get: () => viewport.height },
+  });
+  useEditorUiStore.setState({
+    layoutPreset: "default",
+    agentPanelVisible: false,
+    mediaPanelVisible: true,
+    inspectorPanelVisible: true,
+    focusedPanel: "timeline",
+    maximizedPanel: null,
+    selectedClipIds: new Set(["clip-1"]),
+    selectedMediaAssetIds: new Set(["media-1"]),
+  });
+  useI18nStore.setState({ locale: "en" });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+  vi.unstubAllGlobals();
+});
+
+describe("EditorSplit", () => {
+  it.each([
+    "all_presets_match_geometry_visibility_maximize_and_focus_shell",
+    "all_presets_ratios_gutters_surfaces_focus",
+  ])("%s", async () => {
+    await renderPreset("default");
+    expect(container?.querySelector("[data-layout-preset='default']")).not.toBeNull();
+    expect(panels()).toEqual(["media", "preview", "inspector", "timeline"]);
+
+    const defaultSeparators = [
+      ...(container?.querySelectorAll<HTMLElement>("[role='separator']") ?? []),
+    ];
+    expect(defaultSeparators.some((separator) =>
+      separator.getAttribute("aria-orientation") === "horizontal" &&
+      separator.getAttribute("aria-valuenow") === "700"
+    )).toBe(true);
+    expect(defaultSeparators.some((separator) =>
+      separator.getAttribute("aria-orientation") === "vertical" &&
+      separator.getAttribute("aria-valuenow") === "500"
+    )).toBe(true);
+
+    const timeline = container?.querySelector<HTMLElement>("[data-editor-panel='timeline']");
+    const media = container?.querySelector<HTMLElement>("[data-editor-panel='media']");
+    expect(timeline?.getAttribute("role")).toBe("region");
+    expect(timeline?.getAttribute("aria-label")).toBe("Timeline panel");
+    expect(timeline?.classList.contains("editor-panel-shell")).toBe(true);
+    expect(timeline?.querySelector(".editor-panel-card")).not.toBeNull();
+    expect(
+      timeline?.querySelector<HTMLElement>("[data-panel-focus-ring]")?.classList
+        .contains("editor-panel-focus-ring"),
+    ).toBe(true);
+    expect(
+      timeline?.querySelector<HTMLElement>("[data-panel-focus-ring]")?.style.opacity,
+    ).toBe("0.6");
+
+    await act(async () => media?.dispatchEvent(new MouseEvent("mousedown", { bubbles: true })));
+    expect(useEditorUiStore.getState().focusedPanel).toBe("media");
+    expect(useEditorUiStore.getState().selectedClipIds.size).toBe(0);
+    expect(
+      media?.querySelector<HTMLElement>("[data-panel-focus-ring]")?.style.opacity,
+    ).toBe("0.6");
+    expect(
+      timeline?.querySelector<HTMLElement>("[data-panel-focus-ring]")?.style.opacity,
+    ).toBe("0");
+
+    await renderPreset("media");
+    expect(container?.querySelector("[data-layout-preset='media']")).not.toBeNull();
+    expect(panels()).toEqual(["media", "preview", "inspector", "timeline"]);
+    const mediaSeparators = [
+      ...(container?.querySelectorAll<HTMLElement>("[role='separator']") ?? []),
+    ];
+    expect(mediaSeparators.some((separator) => separator.getAttribute("aria-valuenow") === "480"))
+      .toBe(true);
+    expect(mediaSeparators.some((separator) => separator.getAttribute("aria-valuenow") === "550"))
+      .toBe(true);
+
+    await renderPreset("vertical");
+    expect(container?.querySelector("[data-layout-preset='vertical']")).not.toBeNull();
+    expect(panels()).toEqual(["media", "inspector", "timeline", "preview"]);
+    const verticalSeparators = [
+      ...(container?.querySelectorAll<HTMLElement>("[role='separator']") ?? []),
+    ];
+    expect(verticalSeparators.some((separator) => separator.getAttribute("aria-valuenow") === "800"))
+      .toBe(true);
+    expect(verticalSeparators.some((separator) => separator.getAttribute("aria-valuenow") === "550"))
+      .toBe(true);
+
+    await act(async () => useEditorUiStore.setState({ inspectorPanelVisible: false }));
+    expect(panels()).toEqual(["media", "timeline", "preview"]);
+    expect(
+      container?.querySelector("[data-layout-slot='vertical-top'] [role='separator']"),
+    ).toBeNull();
+
+    await act(async () => useEditorUiStore.setState({ mediaPanelVisible: false }));
+    expect(panels()).toEqual(["timeline", "preview"]);
+
+    await act(async () => useEditorUiStore.setState({
+      mediaPanelVisible: true,
+      inspectorPanelVisible: true,
+      agentPanelVisible: true,
+    }));
+    expect(panels()).toEqual(["agent", "media", "inspector", "timeline", "preview"]);
+    expect(
+      [...(container?.querySelectorAll<HTMLElement>("[role='separator']") ?? [])]
+        .some((separator) => separator.getAttribute("aria-valuenow") === "320"),
+    ).toBe(true);
+
+    await act(async () => {
+      useEditorUiStore.getState().focusPanel("preview");
+      useEditorUiStore.getState().toggleMaximizedFocusedPanel();
+    });
+    expect(panels()).toEqual(["preview"]);
+    expect(container?.querySelector("[role='separator']")).toBeNull();
+
+    await act(async () => useEditorUiStore.getState().setMaximizedPanel(null));
+    const firstSeparator = container?.querySelector<HTMLElement>("[role='separator']");
+    expect(firstSeparator?.tabIndex).toBe(0);
+    const before = Number(firstSeparator?.getAttribute("aria-valuenow"));
+    await act(async () =>
+      firstSeparator?.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowRight", bubbles: true })),
+    );
+    expect(Number(firstSeparator?.getAttribute("aria-valuenow"))).toBeGreaterThan(before);
+
+    viewport = { width: 960, height: 600 };
+    await act(async () => {
+      root?.unmount();
+      root = createRoot(container!);
+      useEditorUiStore.setState({
+        layoutPreset: "default",
+        agentPanelVisible: false,
+        mediaPanelVisible: false,
+        inspectorPanelVisible: false,
+      });
+      root.render(<EditorSplit />);
+    });
+    expect(panels()).toEqual(["preview", "timeline"]);
+    expect(container?.querySelector("[data-layout-preset='default']")).not.toBeNull();
+  });
+});
diff --git a/web/src/components/shell/EditorSplit.tsx b/web/src/components/shell/EditorSplit.tsx
index e07f62c0..d01ee935 100644
--- a/web/src/components/shell/EditorSplit.tsx
+++ b/web/src/components/shell/EditorSplit.tsx
@@ -58,7 +58,7 @@ export function EditorSplit() {
   // Maximized panel takes the whole area.
   if (maximized) {
     return (
-      <div style={{ width: "100%", height: "100%" }}>
+      <div data-maximized-panel={maximized} style={{ width: "100%", height: "100%" }}>
         {maximized === "media" && <Media />}
         {maximized === "preview" && <PreviewPanel />}
         {maximized === "inspector" && <InspectorPanel />}
@@ -120,7 +120,11 @@ function DefaultLayout() {
   );
 
   return (
-    <div ref={ref} style={{ width: "100%", height: "100%" }}>
+    <div
+      ref={ref}
+      data-layout-preset="default"
+      style={{ width: "100%", height: "100%" }}
+    >
       {size.h > 0 && (
         <SplitPane
           mode="vertical"
@@ -159,7 +163,7 @@ function MediaLayout() {
   );
 
   return (
-    <div ref={ref} style={{ width: "100%", height: "100%" }}>
+    <div ref={ref} data-layout-preset="media" style={{ width: "100%", height: "100%" }}>
       {size.w > 0 &&
         (mediaVisible ? (
           <SplitPane
@@ -188,21 +192,27 @@ function VerticalLayout() {
     <RightVerticalSplit
       topRatio={0.55}
       top={
-        <ThreeColumn
-          left={mediaVisible ? <Media /> : null}
-          leftWidth={MEDIA_DEFAULT}
-          center={<InspectorPanel />}
-          right={null}
-          rightWidth={0}
-          centerIsInspector={inspectorVisible}
-        />
+        <div data-layout-slot="vertical-top" style={{ width: "100%", height: "100%" }}>
+          <ThreeColumn
+            left={mediaVisible ? <Media /> : null}
+            leftWidth={MEDIA_DEFAULT}
+            center={<InspectorPanel />}
+            right={null}
+            rightWidth={0}
+            centerIsInspector={inspectorVisible}
+          />
+        </div>
       }
       bottom={<TimelineRegion />}
     />
   );
 
   return (
-    <div ref={ref} style={{ width: "100%", height: "100%" }}>
+    <div
+      ref={ref}
+      data-layout-preset="vertical"
+      style={{ width: "100%", height: "100%" }}
+    >
       {size.w > 0 && (
         <SplitPane
           mode="horizontal"
@@ -258,6 +268,16 @@ function ThreeColumn({
   // center may itself be the inspector (vertical layout) — collapse when hidden.
   const renderedCenter = centerIsInspector === false ? null : center;
 
+  // In Vertical layout the center is the Inspector. When it is collapsed, do
+  // not retain a split whose second pane is only an empty base-colored slot;
+  // the remaining Media panel must consume the full top-left region just as a
+  // collapsed NSSplitView item does upstream.
+  if (!renderedCenter) {
+    if (left) return <div style={{ width: "100%", height: "100%" }}>{left}</div>;
+    if (right) return <div style={{ width: "100%", height: "100%" }}>{right}</div>;
+    return <div style={{ width: "100%", height: "100%", background: "var(--bg-base)" }} />;
+  }
+
   if (left && right) {
     return (
       <SplitPane
diff --git a/web/src/components/shell/ExportDialog.interaction.test.tsx b/web/src/components/shell/ExportDialog.interaction.test.tsx
new file mode 100644
index 00000000..7b2c4db0
--- /dev/null
+++ b/web/src/components/shell/ExportDialog.interaction.test.tsx
@@ -0,0 +1,320 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  cancelExport: vi.fn(),
+  exportBundle: vi.fn(),
+  exportVideo: vi.fn(),
+  getDefaultProjectDir: vi.fn(),
+  onExportProgress: vi.fn(),
+  save: vi.fn(),
+  saveDialog: vi.fn(),
+  unlisten: vi.fn(),
+}));
+
+vi.mock("../../i18n", () => ({
+  useT: () => (key: string) => key,
+}));
+
+vi.mock("../../lib/api", () => ({
+  EXPORT_CANCELLED_SENTINEL: "export cancelled",
+  cancelExport: mocks.cancelExport,
+  createExportOperationId: () => "video-operation-1",
+  exportBundle: mocks.exportBundle,
+  exportVideo: mocks.exportVideo,
+  getDefaultProjectDir: mocks.getDefaultProjectDir,
+  onExportProgress: mocks.onExportProgress,
+}));
+
+vi.mock("../../lib/dialog", () => ({
+  saveDialog: mocks.saveDialog,
+}));
+
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { ExportDialog } from "./ExportDialog";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function buttonWithLabel(label: string): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(`button[aria-label="${label}"]`);
+  expect(button, `button ${label}`).not.toBeNull();
+  return button!;
+}
+
+function buttonWithText(text: string): HTMLButtonElement {
+  const button = [...(container?.querySelectorAll<HTMLButtonElement>("button") ?? [])].find(
+    (candidate) => candidate.textContent === text,
+  );
+  expect(button, `button text ${text}`).not.toBeUndefined();
+  return button!;
+}
+
+async function chooseDropdown(label: string, optionText: string): Promise<void> {
+  await act(async () => buttonWithLabel(label).click());
+  const option = [...(container?.querySelectorAll<HTMLButtonElement>('button[role="option"]') ?? [])]
+    .find((candidate) => candidate.textContent?.includes(optionText));
+  expect(option, `option ${optionText}`).not.toBeUndefined();
+  await act(async () => option?.click());
+}
+
+async function renderDialog(): Promise<void> {
+  await act(async () => root?.render(<ExportDialog />));
+  expect(container?.querySelector('[role="dialog"]')).not.toBeNull();
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  localStorage.clear();
+  useEditorUiStore.setState({
+    exportDialogOpen: true,
+    toast: null,
+  });
+  useProjectStore.setState({
+    projectPath: "/tmp/My Film.opentake",
+    timeline: {
+      fps: 30,
+      width: 1920,
+      height: 1080,
+      settingsConfigured: true,
+      tracks: [],
+    },
+  });
+  mocks.saveDialog.mockResolvedValue(mocks.save);
+  mocks.save.mockResolvedValue("/tmp/render");
+  mocks.getDefaultProjectDir.mockResolvedValue("/tmp");
+  mocks.onExportProgress.mockResolvedValue(mocks.unlisten);
+  mocks.exportVideo.mockResolvedValue({ width: 1920, height: 1080, frameCount: 30 });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+});
+
+describe("ExportDialog control acceptance", () => {
+  it("control-580ab884755388a9 dismiss Export by clicking the backdrop", async () => {
+    await renderDialog();
+    const dialog = container?.querySelector<HTMLElement>('[role="dialog"]');
+    const backdrop = dialog?.parentElement;
+    expect(backdrop).not.toBeNull();
+
+    await act(async () => backdrop?.click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+
+    await act(async () => useEditorUiStore.setState({ exportDialogOpen: true }));
+    let finishExport: ((value: { width: number; height: number; frameCount: number }) => void) | null =
+      null;
+    mocks.exportVideo.mockImplementationOnce(
+      () =>
+        new Promise((resolve) => {
+          finishExport = resolve;
+        }),
+    );
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(buttonWithLabel("export.close").disabled).toBe(true);
+
+    const busyDialog = container?.querySelector<HTMLElement>('[role="dialog"]');
+    await act(async () => busyDialog?.parentElement?.click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+
+    await act(async () => {
+      finishExport?.({ width: 1920, height: 1080, frameCount: 30 });
+      await Promise.resolve();
+    });
+  });
+
+  it("control-6064916ed05a1362 close Export from its header", async () => {
+    await renderDialog();
+    const close = buttonWithLabel("export.close");
+    expect(close.disabled).toBe(false);
+    await act(async () => close.click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+  });
+
+  it("control-34646794727cf515 choose export mode", async () => {
+    mocks.exportVideo.mockRejectedValueOnce(new Error("stale export error"));
+    await renderDialog();
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(container?.textContent).toContain("stale export error");
+
+    await chooseDropdown("export.mode", "export.mode.video");
+    expect(container?.textContent).not.toContain("stale export error");
+  });
+
+  it("control-6846958c0e19c8e9 choose export codec", async () => {
+    await renderDialog();
+    await chooseDropdown("export.format", "export.codec.prores");
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    expect(mocks.save).toHaveBeenCalledWith(
+      expect.objectContaining({
+        defaultPath: "/tmp/My Film.mov",
+        filters: [{ name: "export.saveFilterMov", extensions: ["mov"] }],
+      }),
+    );
+    expect(mocks.exportVideo).toHaveBeenCalledWith(
+      { outPath: "/tmp/render.mov", codec: "prores", quality: "1080p" },
+      "video-operation-1",
+    );
+  });
+
+  it("control-30862b5deb972fcd choose export resolution", async () => {
+    await renderDialog();
+    await chooseDropdown("export.resolution", "export.quality.4k");
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    expect(mocks.exportVideo).toHaveBeenCalledWith(
+      { outPath: "/tmp/render.mp4", codec: "h264", quality: "4k" },
+      "video-operation-1",
+    );
+  });
+
+  it("control-af586bdec82ebcc7 cancel/close Export", async () => {
+    await renderDialog();
+    await act(async () => buttonWithText("export.cancel").click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+    expect(mocks.cancelExport).not.toHaveBeenCalled();
+
+    await act(async () => useEditorUiStore.setState({ exportDialogOpen: true, toast: null }));
+    mocks.exportVideo.mockImplementationOnce(() => new Promise(() => undefined));
+    mocks.cancelExport.mockRejectedValueOnce(new Error("cancel channel unavailable"));
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(buttonWithLabel("export.close").disabled).toBe(true);
+
+    await act(async () => {
+      buttonWithText("export.cancel").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(mocks.cancelExport).toHaveBeenCalledWith("video-operation-1");
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+    expect(container?.textContent).toContain("cancel channel unavailable");
+    expect(useEditorUiStore.getState().toast?.message).toBe("export.failed");
+  });
+
+  it("control-543cacc54290eeba start video export", async () => {
+    await act(async () => useProjectStore.setState({ projectPath: null }));
+    mocks.getDefaultProjectDir.mockResolvedValue("/exports");
+    mocks.save.mockResolvedValue("/exports/final-cut");
+    let reportProgress: ((progress: { done: number; total: number }) => void) | undefined;
+    mocks.onExportProgress.mockImplementationOnce(
+      async (
+        _operationId: string,
+        callback: (progress: { done: number; total: number }) => void,
+      ) => {
+        reportProgress = callback;
+        return mocks.unlisten;
+      },
+    );
+    let finishExport: ((value: { width: number; height: number; frameCount: number }) => void) | null =
+      null;
+    mocks.exportVideo.mockImplementationOnce(
+      () =>
+        new Promise((resolve) => {
+          finishExport = resolve;
+        }),
+    );
+    await renderDialog();
+
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(mocks.getDefaultProjectDir).toHaveBeenCalledOnce();
+    expect(mocks.save).toHaveBeenCalledWith(
+      expect.objectContaining({
+        defaultPath: "/exports/Timeline.mp4",
+        filters: [{ name: "export.saveFilter", extensions: ["mp4"] }],
+      }),
+    );
+    expect(mocks.onExportProgress).toHaveBeenCalledWith(
+      "video-operation-1",
+      expect.any(Function),
+    );
+    expect(mocks.exportVideo).toHaveBeenCalledWith(
+      { outPath: "/exports/final-cut.mp4", codec: "h264", quality: "1080p" },
+      "video-operation-1",
+    );
+
+    await act(async () => reportProgress?.({ done: 15, total: 30 }));
+    expect(container?.querySelector('[role="progressbar"]')?.getAttribute("aria-valuenow")).toBe(
+      "50",
+    );
+    await act(async () => {
+      finishExport?.({ width: 1920, height: 1080, frameCount: 30 });
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+    expect(useEditorUiStore.getState().toast?.message).toBe("export.done");
+    expect(mocks.unlisten).toHaveBeenCalledTimes(1);
+
+    await act(async () => useEditorUiStore.setState({ exportDialogOpen: true, toast: null }));
+    mocks.exportVideo.mockRejectedValueOnce(new Error("export cancelled"));
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+    expect(useEditorUiStore.getState().toast?.message).toBe("export.cancelled");
+    expect(mocks.unlisten).toHaveBeenCalledTimes(2);
+
+    await act(async () => useEditorUiStore.setState({ exportDialogOpen: true, toast: null }));
+    mocks.exportVideo.mockRejectedValueOnce(new Error("encoder unavailable"));
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+    expect(container?.textContent).toContain("encoder unavailable");
+    expect(buttonWithLabel("export.close").disabled).toBe(false);
+    expect(container?.querySelector('[role="progressbar"]')).toBeNull();
+    expect(useEditorUiStore.getState().toast?.message).toBe("export.failed");
+    expect(mocks.unlisten).toHaveBeenCalledTimes(3);
+
+    const exportCallCount = mocks.exportVideo.mock.calls.length;
+    mocks.save.mockResolvedValueOnce(null);
+    await act(async () => {
+      buttonWithText("export.run").click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(mocks.exportVideo).toHaveBeenCalledTimes(exportCallCount);
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+  });
+});
diff --git a/web/src/components/shell/ExportDialog.tsx b/web/src/components/shell/ExportDialog.tsx
index 3d1f5e5c..662d18a8 100644
--- a/web/src/components/shell/ExportDialog.tsx
+++ b/web/src/components/shell/ExportDialog.tsx
@@ -352,7 +352,15 @@ export function ExportDialog() {
     }
     // Bundling has no cooperative cancel; only the video path can stop mid-run.
     const operationId = activeOperationId.current;
-    if (mode === "video" && operationId) await api.cancelExport(operationId);
+    if (mode === "video" && operationId) {
+      try {
+        await api.cancelExport(operationId);
+      } catch (e) {
+        const message = e instanceof Error ? e.message : String(e);
+        setError(message);
+        pushToast(t("export.failed"));
+      }
+    }
   }
 
   return (
diff --git a/web/src/components/shell/ProjectSettingsMismatchDialog.test.tsx b/web/src/components/shell/ProjectSettingsMismatchDialog.test.tsx
new file mode 100644
index 00000000..d2493e29
--- /dev/null
+++ b/web/src/components/shell/ProjectSettingsMismatchDialog.test.tsx
@@ -0,0 +1,63 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+
+vi.mock("../../i18n", () => ({ useT: () => (key: string) => key }));
+
+import { useEditorUiStore } from "../../store/uiStore";
+import { ProjectSettingsMismatchDialog } from "./ProjectSettingsMismatchDialog";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let root: Root;
+let container: HTMLDivElement;
+
+beforeEach(() => {
+  useEditorUiStore.getState().resetProjectRuntimeState();
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  useEditorUiStore.getState().resolveProjectSettingsPrompt(false);
+  await act(async () => root.unmount());
+  container.remove();
+});
+
+async function openPrompt(): Promise<{ choice: Promise<boolean> }> {
+  let choice!: Promise<boolean>;
+  await act(async () => {
+    choice = useEditorUiStore.getState().requestProjectSettingsPrompt({
+      current: { fps: 30, width: 1920, height: 1080 },
+      suggested: { fps: 24, width: 3840, height: 2160 },
+    });
+    root.render(<ProjectSettingsMismatchDialog />);
+  });
+  return { choice };
+}
+
+it("renders an accessible mismatch and resolves match or keep choices", async () => {
+  const { choice: matchChoice } = await openPrompt();
+  const dialog = container.querySelector<HTMLElement>('[role="dialog"]');
+  expect(dialog?.getAttribute("aria-modal")).toBe("true");
+  expect(dialog?.getAttribute("aria-labelledby")).toBe("project-settings-mismatch-title");
+  expect(dialog?.textContent).toContain("1920 × 1080 · 30 fps");
+  expect(dialog?.textContent).toContain("3840 × 2160 · 24 fps");
+
+  const match = [...container.querySelectorAll<HTMLButtonElement>("button")].find(
+    (button) => button.textContent === "projectSettingsMismatch.match",
+  );
+  expect(document.activeElement).toBe(match);
+  await act(async () => match?.click());
+  await expect(matchChoice).resolves.toBe(true);
+  expect(container.querySelector('[role="dialog"]')).toBeNull();
+
+  const { choice: keepChoice } = await openPrompt();
+  await act(async () => window.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape" })));
+  await expect(keepChoice).resolves.toBe(false);
+  expect(container.querySelector('[role="dialog"]')).toBeNull();
+});
diff --git a/web/src/components/shell/ProjectSettingsMismatchDialog.tsx b/web/src/components/shell/ProjectSettingsMismatchDialog.tsx
new file mode 100644
index 00000000..f22564b1
--- /dev/null
+++ b/web/src/components/shell/ProjectSettingsMismatchDialog.tsx
@@ -0,0 +1,87 @@
+import { useEffect } from "react";
+import { useT } from "../../i18n";
+import { useEditorUiStore } from "../../store/uiStore";
+
+function describeSettings(fps: number, width: number, height: number): string {
+  return `${width} × ${height} · ${fps} fps`;
+}
+
+export function ProjectSettingsMismatchDialog() {
+  const t = useT();
+  const prompt = useEditorUiStore((state) => state.projectSettingsPrompt);
+  const resolve = useEditorUiStore((state) => state.resolveProjectSettingsPrompt);
+
+  useEffect(() => {
+    if (!prompt) return;
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key !== "Escape") return;
+      event.preventDefault();
+      resolve(false);
+    };
+    window.addEventListener("keydown", onKeyDown);
+    return () => window.removeEventListener("keydown", onKeyDown);
+  }, [prompt, resolve]);
+
+  if (!prompt) return null;
+  return (
+    <div
+      role="presentation"
+      style={{
+        position: "fixed",
+        inset: 0,
+        zIndex: 10020,
+        display: "grid",
+        placeItems: "center",
+        padding: 24,
+        background: "rgba(0, 0, 0, 0.55)",
+      }}
+      onMouseDown={(event) => {
+        if (event.target === event.currentTarget) resolve(false);
+      }}
+    >
+      <section
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="project-settings-mismatch-title"
+        aria-describedby="project-settings-mismatch-description"
+        style={{
+          width: "min(460px, 100%)",
+          border: "var(--bw-thin) solid var(--border-primary)",
+          borderRadius: 12,
+          padding: 20,
+          background: "var(--bg-elevated)",
+          boxShadow: "0 20px 60px rgba(0,0,0,0.45)",
+          color: "var(--text-primary)",
+        }}
+      >
+        <h2 id="project-settings-mismatch-title" style={{ margin: 0, fontSize: 18 }}>
+          {t("projectSettingsMismatch.title")}
+        </h2>
+        <p
+          id="project-settings-mismatch-description"
+          style={{ margin: "10px 0 18px", color: "var(--text-secondary)", lineHeight: 1.5 }}
+        >
+          {t("projectSettingsMismatch.description")}
+        </p>
+        <dl style={{ margin: 0, display: "grid", gap: 8 }}>
+          <div style={{ display: "flex", justifyContent: "space-between", gap: 16 }}>
+            <dt>{t("projectSettingsMismatch.current")}</dt>
+            <dd style={{ margin: 0 }}>{describeSettings(prompt.current.fps, prompt.current.width, prompt.current.height)}</dd>
+          </div>
+          <div style={{ display: "flex", justifyContent: "space-between", gap: 16 }}>
+            <dt>{t("projectSettingsMismatch.source")}</dt>
+            <dd style={{ margin: 0 }}>{describeSettings(prompt.suggested.fps, prompt.suggested.width, prompt.suggested.height)}</dd>
+          </div>
+        </dl>
+        <div style={{ display: "flex", justifyContent: "flex-end", gap: 10, marginTop: 22 }}>
+          <button type="button" onClick={() => resolve(false)}>
+            {t("projectSettingsMismatch.keep")}
+          </button>
+          <button type="button" autoFocus onClick={() => resolve(true)}>
+            {t("projectSettingsMismatch.match")}
+          </button>
+        </div>
+      </section>
+    </div>
+  );
+}
diff --git a/web/src/components/shell/SaveAsProgress.interaction.test.tsx b/web/src/components/shell/SaveAsProgress.interaction.test.tsx
new file mode 100644
index 00000000..c0ad8bfd
--- /dev/null
+++ b/web/src/components/shell/SaveAsProgress.interaction.test.tsx
@@ -0,0 +1,118 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({
+  cancelExport: vi.fn<(operationId: string) => Promise<void>>(),
+  refreshMedia: vi.fn<() => Promise<void>>(),
+}));
+
+vi.mock("../../lib/api", () => ({
+  EXPORT_CANCELLED_SENTINEL: "export cancelled",
+  cancelExport: mocks.cancelExport,
+  createExportOperationId: () => "save-as:unused",
+  isTauri: true,
+  onExportProgress: vi.fn(),
+  saveClipAsMedia: vi.fn(),
+  saveRangeAsMedia: vi.fn(),
+}));
+
+vi.mock("../../store/mediaStore", () => ({
+  refreshMedia: mocks.refreshMedia,
+}));
+
+import { useEditorUiStore, type SaveAsProgressState } from "../../store/uiStore";
+import { SaveAsProgress } from "./SaveAsProgress";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+const progress = (overrides: Partial<SaveAsProgressState> = {}): SaveAsProgressState => ({
+  operationId: "save-as:clip-1",
+  label: "Saving clip",
+  done: 25,
+  total: 100,
+  cancellable: true,
+  cancelling: false,
+  ...overrides,
+});
+
+function cancelButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>("button");
+  expect(button).not.toBeNull();
+  return button!;
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  useEditorUiStore.setState({ saveAsProgress: progress(), toast: null });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+  useEditorUiStore.setState({ saveAsProgress: null, toast: null });
+});
+
+describe("SaveAsProgress control acceptance", () => {
+  it("control-b0b920085e77d039 cancel Save Clip as Media", async () => {
+    let finishCancel: (() => void) | undefined;
+    mocks.cancelExport.mockImplementationOnce(
+      () => new Promise<void>((resolve) => (finishCancel = resolve)),
+    );
+    await act(async () => root?.render(<SaveAsProgress />));
+
+    expect(container?.querySelector('[role="status"]')?.getAttribute("aria-label")).toBe(
+      "Saving clip",
+    );
+    expect(container?.textContent).toContain("25%");
+    expect(cancelButton().disabled).toBe(false);
+
+    await act(async () => {
+      cancelButton().click();
+      await Promise.resolve();
+    });
+    expect(mocks.cancelExport).toHaveBeenCalledWith("save-as:clip-1");
+    expect(useEditorUiStore.getState().saveAsProgress?.cancelling).toBe(true);
+    expect(cancelButton().disabled).toBe(true);
+    expect(cancelButton().textContent).toBe("正在取消…");
+    await act(async () => finishCancel?.());
+
+    await act(async () =>
+      useEditorUiStore.setState({
+        saveAsProgress: progress({ operationId: "save-as:clip-2" }),
+        toast: null,
+      }),
+    );
+    mocks.cancelExport.mockRejectedValueOnce(new Error("cancel transport failed"));
+    await act(async () => {
+      cancelButton().click();
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+    expect(mocks.cancelExport).toHaveBeenLastCalledWith("save-as:clip-2");
+    expect(useEditorUiStore.getState().saveAsProgress?.cancelling).toBe(false);
+    expect(cancelButton().disabled).toBe(false);
+    expect(useEditorUiStore.getState().toast?.message).toContain("cancel transport failed");
+
+    const callCount = mocks.cancelExport.mock.calls.length;
+    await act(async () =>
+      useEditorUiStore.setState({
+        saveAsProgress: progress({ operationId: "save-as:preparing", cancellable: false }),
+      }),
+    );
+    expect(cancelButton().disabled).toBe(true);
+    await act(async () => cancelButton().click());
+    expect(mocks.cancelExport).toHaveBeenCalledTimes(callCount);
+  });
+});
diff --git a/web/src/components/shell/ShellComponentMapping.test.tsx b/web/src/components/shell/ShellComponentMapping.test.tsx
new file mode 100644
index 00000000..c0345026
--- /dev/null
+++ b/web/src/components/shell/ShellComponentMapping.test.tsx
@@ -0,0 +1,86 @@
+import { readFileSync } from "node:fs";
+import { relative, sep } from "node:path";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+
+interface ExactOwner {
+  capability: string;
+  owner: string;
+  source: URL;
+  liveBoundary: string;
+  visibleEvidence: URL;
+}
+
+const exactOwners: ExactOwner[] = [
+  {
+    capability: "AI Edit 建议与审阅",
+    owner: "AiEditTab",
+    source: new URL("../inspector/AiEditTab.tsx", import.meta.url),
+    liveBoundary: "edit.setClipProperties",
+    visibleEvidence: new URL("../inspector/AiEditTab.test.tsx", import.meta.url),
+  },
+  {
+    capability: "音乐浏览、导入与放置",
+    owner: "MusicTab",
+    source: new URL("../media/MusicTab.tsx", import.meta.url),
+    liveBoundary: "addMediaToTimeline",
+    visibleEvidence: new URL("../media/MusicTab.test.tsx", import.meta.url),
+  },
+  {
+    capability: "转场选择与应用",
+    owner: "TransitionTab",
+    source: new URL("../media/TransitionTab.tsx", import.meta.url),
+    liveBoundary: "setTransition",
+    visibleEvidence: new URL("../media/TransitionTab.test.tsx", import.meta.url),
+  },
+  {
+    capability: "画布变换覆盖层",
+    owner: "TransformOverlay",
+    source: new URL("../preview/TransformOverlay.tsx", import.meta.url),
+    liveBoundary: "edit.setClipProperties",
+    visibleEvidence: new URL("../preview/TransformOverlay.test.tsx", import.meta.url),
+  },
+  {
+    capability: "画布裁剪覆盖层",
+    owner: "CropOverlay",
+    source: new URL("../preview/CropOverlay.tsx", import.meta.url),
+    liveBoundary: "edit.setClipProperties",
+    visibleEvidence: new URL("../../lib/cropOverlay.test.ts", import.meta.url),
+  },
+];
+
+describe("ShellComponentMapping", () => {
+  it("every_documented_shell_component_has_exact_owner", () => {
+    const repositoryRoot = fileURLToPath(new URL("../../../../", import.meta.url));
+    const componentMap = readFileSync(
+      new URL("../../../../docs/specs/frontend/3-components.md", import.meta.url),
+      "utf8",
+    );
+
+    for (const entry of exactOwners) {
+      const source = readFileSync(entry.source, "utf8");
+      const evidence = readFileSync(entry.visibleEvidence, "utf8");
+      const relativeSource = relative(repositoryRoot, fileURLToPath(entry.source))
+        .split(sep)
+        .join("/");
+
+      expect(componentMap, `${entry.capability} is missing from the component map`).toContain(
+        `| ${entry.capability} |`,
+      );
+      expect(componentMap, `${entry.owner} does not have one exact documented source`).toContain(
+        `\`${entry.owner}\` → \`${relativeSource}\``,
+      );
+      expect(source).toContain(`export function ${entry.owner}`);
+      expect(source).toContain(entry.liveBoundary);
+      expect(evidence).toMatch(/describe\(|it\(/);
+    }
+
+    const transitionCanvasEvidence = readFileSync(
+      new URL("../timeline/timelineOverlays.test.ts", import.meta.url),
+      "utf8",
+    );
+    expect(transitionCanvasEvidence).toContain(
+      "paints a cut marker for a valid adjacent cross dissolve",
+    );
+  });
+});
diff --git a/web/src/components/shell/SplitPane.interaction.test.tsx b/web/src/components/shell/SplitPane.interaction.test.tsx
new file mode 100644
index 00000000..fed8c06a
--- /dev/null
+++ b/web/src/components/shell/SplitPane.interaction.test.tsx
@@ -0,0 +1,117 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { SplitPane } from "./SplitPane";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let container: HTMLDivElement;
+let root: Root;
+let setPointerCapture: ReturnType<typeof vi.spyOn>;
+let releasePointerCapture: ReturnType<typeof vi.spyOn>;
+
+beforeEach(() => {
+  vi.stubGlobal("ResizeObserver", undefined);
+  vi.spyOn(HTMLElement.prototype, "clientWidth", "get").mockReturnValue(600);
+  vi.spyOn(HTMLElement.prototype, "clientHeight", "get").mockReturnValue(400);
+  setPointerCapture = vi.spyOn(HTMLElement.prototype, "setPointerCapture")
+    .mockImplementation(() => {});
+  releasePointerCapture = vi.spyOn(HTMLElement.prototype, "releasePointerCapture")
+    .mockImplementation(() => {});
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  vi.restoreAllMocks();
+  vi.unstubAllGlobals();
+});
+
+it("control-d88c7103e09bb382 resize two editor panes", async () => {
+  await act(async () => {
+    root.render(
+      <SplitPane
+        mode="horizontal"
+        initial={200}
+        min={100}
+        secondMin={150}
+        first={<div data-pane="first" />}
+        second={<div data-pane="second" />}
+      />,
+    );
+  });
+  const separator = container.querySelector<HTMLElement>("[role='separator']")!;
+  const split = separator.parentElement?.parentElement as HTMLElement;
+  split.getBoundingClientRect = () =>
+    ({ left: 100, width: 600, right: 700, top: 50, height: 400, bottom: 450 }) as DOMRect;
+  expect(separator.tabIndex).toBe(0);
+  expect(separator.getAttribute("aria-orientation")).toBe("vertical");
+  expect(separator.getAttribute("aria-valuemin")).toBe("100");
+  expect(separator.getAttribute("aria-valuemax")).toBe("450");
+
+  await act(async () => {
+    separator.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 300,
+    }));
+    separator.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 0,
+    }));
+  });
+  expect(setPointerCapture).toHaveBeenCalledWith(3);
+  expect(separator.dataset.interactionState).toBe("dragging");
+  expect(separator.getAttribute("aria-valuenow")).toBe("100");
+
+  await act(async () => {
+    separator.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 3,
+      clientX: 1000,
+    }));
+  });
+  expect(separator.getAttribute("aria-valuenow")).toBe("450");
+  await act(async () => {
+    separator.dispatchEvent(new PointerEvent("pointercancel", {
+      bubbles: true,
+      pointerId: 3,
+    }));
+  });
+  expect(separator.dataset.interactionState).toBe("enabled");
+  expect(releasePointerCapture).toHaveBeenCalledWith(3);
+
+  separator.focus();
+  await act(async () => {
+    separator.dispatchEvent(new KeyboardEvent("keydown", { key: "Home", bubbles: true }));
+  });
+  expect(separator.getAttribute("aria-valuenow")).toBe("100");
+  await act(async () => {
+    separator.dispatchEvent(new KeyboardEvent("keydown", { key: "End", bubbles: true }));
+  });
+  expect(separator.getAttribute("aria-valuenow")).toBe("450");
+  expect(document.activeElement).toBe(separator);
+
+  await act(async () => {
+    root.render(
+      <SplitPane
+        mode="vertical"
+        initial={160}
+        min={80}
+        secondMin={120}
+        first={<div />}
+        second={<div />}
+      />,
+    );
+  });
+  const vertical = container.querySelector<HTMLElement>("[role='separator']")!;
+  expect(vertical.getAttribute("aria-orientation")).toBe("horizontal");
+  expect(vertical.getAttribute("aria-valuemax")).toBe("280");
+});
diff --git a/web/src/components/shell/SplitPane.tsx b/web/src/components/shell/SplitPane.tsx
index 32bfa9b6..665bbd3c 100644
--- a/web/src/components/shell/SplitPane.tsx
+++ b/web/src/components/shell/SplitPane.tsx
@@ -5,7 +5,8 @@
  * for the first pane and a minimum for the second.
  */
 
-import { useCallback, useRef, useState, type ReactNode } from "react";
+import { useCallback, useEffect, useRef, useState, type ReactNode } from "react";
+import { useT } from "../../i18n";
 
 interface SplitPaneProps {
   mode: "horizontal" | "vertical"; // horizontal = side-by-side; vertical = stacked
@@ -26,16 +27,50 @@ export function SplitPane({
   first,
   second,
 }: SplitPaneProps) {
+  const t = useT();
   const isH = mode === "horizontal";
   const containerRef = useRef<HTMLDivElement>(null);
   const [size, setSize] = useState(initial);
+  const [totalSize, setTotalSize] = useState(initial + secondMin);
   const dragging = useRef(false);
+  const captureRef = useRef<{ element: HTMLElement; pointerId: number } | null>(null);
+  const [dragActive, setDragActive] = useState(false);
+
+  useEffect(() => {
+    const container = containerRef.current;
+    if (!container) return;
+    const measure = () => {
+      const nextTotal = isH ? container.clientWidth : container.clientHeight;
+      if (nextTotal <= 0) return;
+      setTotalSize(nextTotal);
+      setSize((current) => Math.max(min, Math.min(nextTotal - secondMin, current)));
+    };
+    measure();
+    if (typeof ResizeObserver === "undefined") {
+      window.addEventListener("resize", measure);
+      return () => window.removeEventListener("resize", measure);
+    }
+    const observer = new ResizeObserver(measure);
+    observer.observe(container);
+    return () => observer.disconnect();
+  }, [isH, min, secondMin]);
+
+  const setClampedSize = useCallback(
+    (next: number, total = totalSize) => {
+      setSize(Math.max(min, Math.min(Math.max(min, total - secondMin), next)));
+    },
+    [min, secondMin, totalSize],
+  );
 
   const onPointerDown = useCallback(
     (e: React.PointerEvent) => {
       e.preventDefault();
       dragging.current = true;
-      (e.target as HTMLElement).setPointerCapture(e.pointerId);
+      setDragActive(true);
+      const element = e.currentTarget as HTMLElement;
+      element.focus();
+      captureRef.current = { element, pointerId: e.pointerId };
+      element.setPointerCapture(e.pointerId);
     },
     [],
   );
@@ -46,17 +81,45 @@ export function SplitPane({
       const rect = containerRef.current.getBoundingClientRect();
       const total = isH ? rect.width : rect.height;
       const pos = isH ? e.clientX - rect.left : e.clientY - rect.top;
-      const clamped = Math.max(min, Math.min(total - secondMin, pos));
-      setSize(clamped);
+      setTotalSize(total);
+      setClampedSize(pos, total);
     },
-    [isH, min, secondMin],
+    [isH, setClampedSize],
   );
 
-  const onPointerUp = useCallback((e: React.PointerEvent) => {
+  const endPointerDrag = useCallback((releaseCapture: boolean) => {
     dragging.current = false;
-    (e.target as HTMLElement).releasePointerCapture(e.pointerId);
+    setDragActive(false);
+    const capture = captureRef.current;
+    captureRef.current = null;
+    if (!releaseCapture || !capture) return;
+    try {
+      capture.element.releasePointerCapture(capture.pointerId);
+    } catch {
+      // Pointer capture may already have been released by the browser.
+    }
   }, []);
 
+  const onPointerUp = useCallback(() => endPointerDrag(true), [endPointerDrag]);
+
+  const onKeyDown = useCallback(
+    (event: React.KeyboardEvent) => {
+      if (event.key === "Escape" && dragging.current) {
+        event.preventDefault();
+        endPointerDrag(true);
+        return;
+      }
+      const decrease = isH ? event.key === "ArrowLeft" : event.key === "ArrowUp";
+      const increase = isH ? event.key === "ArrowRight" : event.key === "ArrowDown";
+      if (!decrease && !increase && event.key !== "Home" && event.key !== "End") return;
+      event.preventDefault();
+      if (event.key === "Home") setClampedSize(min);
+      else if (event.key === "End") setClampedSize(totalSize - secondMin);
+      else setClampedSize(size + (increase ? 10 : -10));
+    },
+    [endPointerDrag, isH, min, secondMin, setClampedSize, size, totalSize],
+  );
+
   return (
     <div
       ref={containerRef}
@@ -80,20 +143,33 @@ export function SplitPane({
         {first}
       </div>
       <div
-        onPointerDown={onPointerDown}
-        onPointerMove={onPointerMove}
-        onPointerUp={onPointerUp}
         style={{
           position: "relative",
           flex: "0 0 0px",
-          cursor: isH ? "col-resize" : "row-resize",
           zIndex: 50,
         }}
       >
         {/* widened hit-area centered on the seam */}
         <div
+          className="split-pane-separator"
+          role="separator"
+          aria-label={t("layout.resizePanels")}
+          aria-orientation={isH ? "vertical" : "horizontal"}
+          aria-valuemin={min}
+          aria-valuemax={Math.max(min, totalSize - secondMin)}
+          aria-valuenow={Math.round(size)}
+          aria-valuetext={t("layout.positionPixels", { value: Math.round(size) })}
+          data-interaction-state={dragActive ? "dragging" : "enabled"}
+          tabIndex={0}
+          onPointerDown={onPointerDown}
+          onPointerMove={onPointerMove}
+          onPointerUp={onPointerUp}
+          onPointerCancel={() => endPointerDrag(true)}
+          onLostPointerCapture={() => endPointerDrag(false)}
+          onKeyDown={onKeyDown}
           style={{
             position: "absolute",
+            cursor: isH ? "col-resize" : "row-resize",
             ...(isH
               ? { top: 0, bottom: 0, left: -(GAP / 2), width: GAP }
               : { left: 0, right: 0, top: -(GAP / 2), height: GAP }),
diff --git a/web/src/components/shell/TitleBar.interaction.test.tsx b/web/src/components/shell/TitleBar.interaction.test.tsx
index fc19ee48..383b51ff 100644
--- a/web/src/components/shell/TitleBar.interaction.test.tsx
+++ b/web/src/components/shell/TitleBar.interaction.test.tsx
@@ -4,11 +4,37 @@ import { act } from "react";
 import { createRoot, type Root } from "react-dom/client";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
+const mocks = vi.hoisted(() => ({
+  exportEdl: vi.fn(),
+  exportFcpxmlModern: vi.fn(),
+  exportOtio: vi.fn(),
+  exportSubtitles: vi.fn(),
+  exportXmeml: vi.fn(),
+  getDefaultProjectDir: vi.fn(),
+  save: vi.fn(),
+  saveDialog: vi.fn(),
+}));
+
 vi.mock("../../i18n", () => ({
   useT: () => (key: string) => key,
 }));
 
+vi.mock("../../lib/api", () => ({
+  exportEdl: mocks.exportEdl,
+  exportFcpxmlModern: mocks.exportFcpxmlModern,
+  exportOtio: mocks.exportOtio,
+  exportSubtitles: mocks.exportSubtitles,
+  exportXmeml: mocks.exportXmeml,
+  getDefaultProjectDir: mocks.getDefaultProjectDir,
+}));
+
+vi.mock("../../lib/dialog", () => ({
+  saveDialog: mocks.saveDialog,
+}));
+
 import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import type { Clip } from "../../lib/types";
 import { TitleBar } from "./TitleBar";
 
 (globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
@@ -18,8 +44,28 @@ let root: Root | null = null;
 let container: HTMLDivElement | null = null;
 
 beforeEach(() => {
+  vi.clearAllMocks();
   localStorage.clear();
-  useEditorUiStore.setState({ agentPanelVisible: false });
+  useEditorUiStore.setState({
+    agentPanelVisible: false,
+    exportDialogOpen: false,
+    settingsOpen: false,
+    toast: null,
+    view: "editor",
+  });
+  useProjectStore.setState({
+    projectPath: "/tmp/TalkingHeadQA.opentake",
+    timeline: {
+      fps: 30,
+      width: 1920,
+      height: 1080,
+      settingsConfigured: true,
+      tracks: [],
+    },
+  });
+  mocks.saveDialog.mockResolvedValue(mocks.save);
+  mocks.getDefaultProjectDir.mockResolvedValue("/tmp");
+  mocks.exportSubtitles.mockResolvedValue({ outPath: "/tmp/captions.srt", cueCount: 4 });
   container = document.createElement("div");
   document.body.append(container);
   root = createRoot(container);
@@ -49,7 +95,7 @@ describe("TitleBar Agent entry", () => {
     expect(useEditorUiStore.getState().agentPanelVisible).toBe(true);
     expect(button?.getAttribute("aria-pressed")).toBe("true");
     expect(button?.style.opacity).toBe("1");
-    expect(localStorage.getItem("agentPanelVisible")).toBe("true");
+    expect(localStorage.getItem("opentake.ui.v1.agentPanelVisible")).toBe("true");
 
     await act(async () => button?.click());
     expect(useEditorUiStore.getState().agentPanelVisible).toBe(false);
@@ -71,3 +117,278 @@ describe("TitleBar Agent entry", () => {
     expect(useEditorUiStore.getState().agentPanelVisible).toBe(true);
   });
 });
+
+describe("TitleBar navigation and video export controls", () => {
+  it("control-f52cc89817361a19 return from editor to Home", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const home = container?.querySelector<HTMLButtonElement>('button[aria-label="title.backHome"]');
+    expect(home).not.toBeNull();
+
+    await act(async () => home?.click());
+    expect(useEditorUiStore.getState().view).toBe("home");
+  });
+
+  it("control-4bda8f075e1f3a14 open the global Library", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const library = container?.querySelector<HTMLButtonElement>('button[aria-label="library.entry"]');
+    expect(library).not.toBeNull();
+
+    await act(async () => library?.click());
+    expect(useEditorUiStore.getState().view).toBe("library");
+  });
+
+  it("control-ff132f94a8c87906 open Settings from the editor", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const settings = container?.querySelector<HTMLButtonElement>('button[aria-label="title.settings"]');
+    expect(settings).not.toBeNull();
+
+    await act(async () => settings?.click());
+    expect(useEditorUiStore.getState().settingsOpen).toBe(true);
+  });
+
+  it("control-d7ba227c6447e43e open Video Export", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const emptyExport = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportVideo"]',
+    );
+    expect(emptyExport?.disabled).toBe(true);
+    await act(async () => emptyExport?.click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(false);
+
+    await act(async () => useProjectStore.setState({
+      timeline: {
+        ...useProjectStore.getState().timeline,
+        tracks: [{
+          id: "v1",
+          type: "video",
+          muted: false,
+          hidden: false,
+          syncLocked: true,
+          clips: [{} as Clip],
+        }],
+      },
+    }));
+    const populatedExport = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportVideo"]',
+    );
+    expect(populatedExport?.disabled).toBe(false);
+    await act(async () => populatedExport?.click());
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+  });
+
+  it("control-229710d0115f07bc open/close interchange export menu", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="title.export"]');
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+
+    await act(async () => trigger?.click());
+    expect(trigger?.getAttribute("aria-expanded")).toBe("true");
+    await act(async () => window.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape" })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+
+    await act(async () => trigger?.click());
+    await act(async () => window.dispatchEvent(new MouseEvent("mousedown", { bubbles: true })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+  });
+
+  it("control-02d1bf7fff7c1e3a open Video Export from the interchange menu", async () => {
+    useProjectStore.setState({
+      timeline: {
+        ...useProjectStore.getState().timeline,
+        tracks: [{
+          id: "v1",
+          type: "video",
+          muted: false,
+          hidden: false,
+          syncLocked: true,
+          clips: [{} as Clip],
+        }],
+      },
+    });
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="title.export"]');
+    await act(async () => trigger?.click());
+    const renderVideo = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportRenderVideo");
+    expect(renderVideo?.disabled).toBe(false);
+
+    await act(async () => renderVideo?.click());
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+    expect(useEditorUiStore.getState().exportDialogOpen).toBe(true);
+  });
+});
+
+describe("TitleBar interchange export", () => {
+  it.each([
+    ["xml", "title.exportXmeml", mocks.exportXmeml],
+    ["fcpxml", "title.exportFcpxml", mocks.exportFcpxmlModern],
+    ["otio", "title.exportOtio", mocks.exportOtio],
+    ["edl", "title.exportEdl", mocks.exportEdl],
+  ] as const)("control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL (%s)", async (ext, label, run) => {
+    mocks.save.mockResolvedValue("/tmp/interchange");
+    run.mockResolvedValue(undefined);
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="title.export"]');
+    await act(async () => trigger?.click());
+    const formatItem = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === label);
+    expect(formatItem).not.toBeUndefined();
+
+    await act(async () => {
+      formatItem?.click();
+      await Promise.resolve();
+    });
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+    expect(mocks.save).toHaveBeenCalledWith(expect.objectContaining({
+      defaultPath: `/tmp/TalkingHeadQA.${ext}`,
+    }));
+    expect(mocks.save.mock.calls[0]?.[0]).not.toHaveProperty("filters");
+    expect(run).toHaveBeenCalledTimes(1);
+    expect(run).toHaveBeenCalledWith(`/tmp/interchange.${ext}`);
+    expect(useEditorUiStore.getState().toast?.message).toBe("title.exportInterchangeDone");
+  });
+
+  it("control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL reports failure", async () => {
+    mocks.save.mockResolvedValueOnce("/tmp/failed.xml");
+    mocks.exportXmeml.mockRejectedValueOnce(new Error("write failed"));
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="title.export"]');
+    await act(async () => trigger?.click());
+    const xmeml = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportXmeml");
+
+    await act(async () => {
+      xmeml?.click();
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().toast?.message).toBe("title.exportInterchangeFailed");
+  });
+
+  it("control-0d98e5e5a0c417ed export XMEML/FCPXML/OTIO/EDL preserves cancel and default-directory behavior", async () => {
+    useProjectStore.setState({ projectPath: null });
+    mocks.save.mockResolvedValueOnce(null);
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="title.export"]');
+    await act(async () => trigger?.click());
+    const edl = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportEdl");
+
+    await act(async () => {
+      edl?.click();
+      await Promise.resolve();
+    });
+    expect(mocks.getDefaultProjectDir).toHaveBeenCalledTimes(1);
+    expect(mocks.save).toHaveBeenCalledWith(expect.objectContaining({ defaultPath: "/tmp/Timeline.edl" }));
+    expect(mocks.exportEdl).not.toHaveBeenCalled();
+    expect(useEditorUiStore.getState().toast).toBeNull();
+  });
+});
+
+describe("TitleBar subtitle export", () => {
+  it("control-c035467e6746e570 open/close subtitle export formats", async () => {
+    await act(async () => root?.render(<TitleBar />));
+
+    const trigger = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportSubtitles"]',
+    );
+    expect(trigger).not.toBeNull();
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+
+    await act(async () => trigger?.click());
+    expect(trigger?.getAttribute("aria-expanded")).toBe("true");
+    expect(container?.querySelector('[role="menu"]')).not.toBeNull();
+
+    await act(async () => window.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape" })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+    expect(container?.querySelector('[role="menu"]')).toBeNull();
+
+    await act(async () => trigger?.click());
+    await act(async () => window.dispatchEvent(new MouseEvent("mousedown", { bubbles: true })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+    expect(container?.querySelector('[role="menu"]')).toBeNull();
+  });
+
+  it.each([
+    ["srt", "title.exportSrt", "/tmp/captions.srt"],
+    ["vtt", "title.exportVtt", "/tmp/captions.vtt"],
+  ] as const)("control-f54f4037ab7bffbe export SRT or VTT subtitles (%s)", async (format, label, path) => {
+    mocks.save.mockResolvedValue("/tmp/captions");
+    mocks.exportSubtitles.mockResolvedValue({ outPath: path, cueCount: 4 });
+    await act(async () => root?.render(<TitleBar />));
+
+    const trigger = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportSubtitles"]',
+    );
+    expect(trigger).not.toBeNull();
+    await act(async () => trigger?.click());
+
+    const menuItem = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === label);
+    expect(menuItem).not.toBeUndefined();
+    await act(async () => {
+      menuItem?.click();
+      await Promise.resolve();
+    });
+
+    expect(mocks.save).toHaveBeenCalledWith(
+      expect.objectContaining({
+        defaultPath: `/tmp/TalkingHeadQA.${format}`,
+        filters: [expect.objectContaining({ extensions: [format] })],
+      }),
+    );
+    expect(mocks.exportSubtitles).toHaveBeenCalledTimes(1);
+    expect(mocks.exportSubtitles).toHaveBeenCalledWith(path, format);
+    expect(useEditorUiStore.getState().toast?.message).toBe("title.exportSubtitlesDone");
+  });
+
+  it("control-f54f4037ab7bffbe export SRT or VTT subtitles reports empty and failure", async () => {
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportSubtitles"]',
+    );
+
+    mocks.save.mockResolvedValueOnce("/tmp/empty.srt");
+    mocks.exportSubtitles.mockResolvedValueOnce({ outPath: "/tmp/empty.srt", cueCount: 0 });
+    await act(async () => trigger?.click());
+    const srt = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportSrt");
+    await act(async () => {
+      srt?.click();
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().toast?.message).toBe("title.exportSubtitlesEmpty");
+
+    useEditorUiStore.setState({ toast: null });
+    mocks.save.mockResolvedValueOnce("/tmp/failed.vtt");
+    mocks.exportSubtitles.mockRejectedValueOnce(new Error("write failed"));
+    await act(async () => trigger?.click());
+    const vtt = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportVtt");
+    await act(async () => {
+      vtt?.click();
+      await Promise.resolve();
+    });
+    expect(useEditorUiStore.getState().toast?.message).toBe("title.exportSubtitlesFailed");
+  });
+
+  it("control-f54f4037ab7bffbe export SRT or VTT subtitles preserves cancel and default-directory behavior", async () => {
+    useProjectStore.setState({ projectPath: null });
+    await act(async () => root?.render(<TitleBar />));
+    const trigger = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="title.exportSubtitles"]',
+    );
+
+    mocks.save.mockResolvedValueOnce(null);
+    await act(async () => trigger?.click());
+    const srt = [...(container?.querySelectorAll<HTMLButtonElement>('[role="menuitem"]') ?? [])]
+      .find((button) => button.textContent === "title.exportSrt");
+    await act(async () => {
+      srt?.click();
+      await Promise.resolve();
+    });
+    expect(mocks.getDefaultProjectDir).toHaveBeenCalledTimes(1);
+    expect(mocks.save).toHaveBeenCalledWith(expect.objectContaining({ defaultPath: "/tmp/Timeline.srt" }));
+    expect(mocks.exportSubtitles).not.toHaveBeenCalled();
+    expect(useEditorUiStore.getState().toast).toBeNull();
+  });
+});
diff --git a/web/src/components/shell/TitleBar.tsx b/web/src/components/shell/TitleBar.tsx
index 87a63dfb..8daf59c1 100644
--- a/web/src/components/shell/TitleBar.tsx
+++ b/web/src/components/shell/TitleBar.tsx
@@ -97,7 +97,9 @@ export function TitleBar() {
     const chosen = await save({
       title: t(`title.export${format.key}Dialog`),
       defaultPath,
-      filters: [{ name: t(`title.export${format.key}Filter`), extensions: [format.ext] }],
+      // rfd's deprecated macOS allowedFileTypes path disables Save for
+      // interchange extensions on macOS 26. withExt() enforces the type after
+      // confirmation while retaining the intended directory and filename.
     });
     if (typeof chosen !== "string") return; // cancelled
 
diff --git a/web/src/components/shell/TitleBar.visual.test.ts b/web/src/components/shell/TitleBar.visual.test.ts
index 69c283c9..cbc6c433 100644
--- a/web/src/components/shell/TitleBar.visual.test.ts
+++ b/web/src/components/shell/TitleBar.visual.test.ts
@@ -55,3 +55,12 @@ describe("TitleBar interchange export menu", () => {
     expect(titleBarSource).toContain("INTERCHANGE_FORMATS.map");
   });
 });
+
+describe("TitleBar subtitle export menu", () => {
+  it("subtitle export menu routes srt and vtt", () => {
+    expect(titleBarSource).toContain('(["srt", "vtt"] as const).map');
+    expect(titleBarSource).toContain("onExportSubtitles(fmt)");
+    expect(titleBarSource).toContain("api.exportSubtitles(withExt(chosen, format), format)");
+    expect(titleBarSource).toContain('extensions: [format]');
+  });
+});
diff --git a/web/src/components/shell/ViewMenu.interaction.test.tsx b/web/src/components/shell/ViewMenu.interaction.test.tsx
new file mode 100644
index 00000000..8036108f
--- /dev/null
+++ b/web/src/components/shell/ViewMenu.interaction.test.tsx
@@ -0,0 +1,122 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../../i18n", () => ({
+  useT: () => (key: string) => key,
+}));
+
+import { useEditorUiStore } from "../../store/uiStore";
+import { ViewMenu } from "./ViewMenu";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function menuButton(label: string): HTMLButtonElement | undefined {
+  return [...(container?.querySelectorAll<HTMLButtonElement>('[role="menu"] button') ?? [])]
+    .find((button) => button.textContent?.includes(label));
+}
+
+async function renderAndOpen() {
+  await act(async () => root?.render(<ViewMenu />));
+  const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="view.menu"]');
+  expect(trigger).not.toBeNull();
+  await act(async () => trigger?.click());
+  expect(trigger?.getAttribute("aria-expanded")).toBe("true");
+  expect(container?.querySelector('[role="menu"]')).not.toBeNull();
+  return trigger;
+}
+
+beforeEach(() => {
+  localStorage.clear();
+  useEditorUiStore.setState({
+    layoutPreset: "default",
+    agentPanelVisible: false,
+    mediaPanelVisible: true,
+    inspectorPanelVisible: true,
+  });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+});
+
+describe("ViewMenu planned control acceptance", () => {
+  it("control-d826a0ad433703cb open/close the View menu", async () => {
+    const trigger = await renderAndOpen();
+
+    await act(async () => trigger?.click());
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+
+    await act(async () => trigger?.click());
+    await act(async () => window.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape" })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+
+    await act(async () => trigger?.click());
+    await act(async () => window.dispatchEvent(new MouseEvent("mousedown", { bubbles: true })));
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+  });
+
+  it("control-a2d1b5cb37952878 select a layout preset", async () => {
+    const trigger = await renderAndOpen();
+    const mediaLayout = menuButton("view.layoutMedia");
+    expect(mediaLayout?.getAttribute("aria-checked")).toBe("false");
+
+    await act(async () => mediaLayout?.click());
+
+    expect(useEditorUiStore.getState().layoutPreset).toBe("media");
+    expect(localStorage.getItem("opentake.ui.v1.layoutPreset")).toBe("media");
+    expect(trigger?.getAttribute("aria-expanded")).toBe("false");
+    expect(container?.querySelector('[role="menu"]')).toBeNull();
+  });
+
+  it("control-d606f9c3adb8762a toggle the Agent panel", async () => {
+    await renderAndOpen();
+    const agent = menuButton("view.agentPanel");
+    expect(agent?.getAttribute("aria-checked")).toBe("false");
+
+    await act(async () => agent?.click());
+
+    expect(useEditorUiStore.getState().agentPanelVisible).toBe(true);
+    expect(localStorage.getItem("opentake.ui.v1.agentPanelVisible")).toBe("true");
+    expect(agent?.getAttribute("aria-checked")).toBe("true");
+    expect(container?.querySelector('[role="menu"]')).not.toBeNull();
+  });
+
+  it("control-acd9e30dacf466b6 toggle the Media panel", async () => {
+    await renderAndOpen();
+    const media = menuButton("view.mediaPanel");
+    expect(media?.getAttribute("aria-checked")).toBe("true");
+
+    await act(async () => media?.click());
+
+    expect(useEditorUiStore.getState().mediaPanelVisible).toBe(false);
+    expect(localStorage.getItem("opentake.ui.v1.mediaPanelVisible")).toBe("false");
+    expect(media?.getAttribute("aria-checked")).toBe("false");
+    expect(container?.querySelector('[role="menu"]')).not.toBeNull();
+  });
+
+  it("control-fb7422e825128973 toggle the Inspector panel", async () => {
+    await renderAndOpen();
+    const inspector = menuButton("view.inspector");
+    expect(inspector?.getAttribute("aria-checked")).toBe("true");
+
+    await act(async () => inspector?.click());
+
+    expect(useEditorUiStore.getState().inspectorPanelVisible).toBe(false);
+    expect(localStorage.getItem("opentake.ui.v1.inspectorPanelVisible")).toBe("false");
+    expect(inspector?.getAttribute("aria-checked")).toBe("false");
+    expect(container?.querySelector('[role="menu"]')).not.toBeNull();
+  });
+});
diff --git a/web/src/components/shell/ViewMenu.test.tsx b/web/src/components/shell/ViewMenu.test.tsx
new file mode 100644
index 00000000..8736c2c0
--- /dev/null
+++ b/web/src/components/shell/ViewMenu.test.tsx
@@ -0,0 +1,349 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../../i18n", () => ({
+  useT: () => (key: string) => key,
+  t: (key: string) => key,
+  useI18nStore: { subscribe: () => () => {} },
+}));
+
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { useClipboardStore } from "../../store/clipboardStore";
+import { useMediaStore } from "../../store/mediaStore";
+import { handleViewShortcutKeyDown } from "../../hooks/useKeyboardShortcuts";
+import {
+  APPLICATION_MENU_SPEC,
+  applicationMenuStateSnapshot,
+  runApplicationMenuCommand,
+  ViewMenu,
+} from "./ViewMenu";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function menuItems(): HTMLButtonElement[] {
+  return [...(container?.querySelectorAll<HTMLButtonElement>('[role="menu"] button') ?? [])];
+}
+
+function menuItem(label: string): HTMLButtonElement {
+  const item = menuItems().find((button) => button.textContent?.includes(label));
+  expect(item, `missing menu item ${label}`).toBeDefined();
+  return item!;
+}
+
+async function openMenu(): Promise<HTMLButtonElement> {
+  const trigger = container?.querySelector<HTMLButtonElement>('button[aria-label="view.menu"]');
+  expect(trigger).not.toBeNull();
+  await act(async () => trigger?.click());
+  expect(trigger?.getAttribute("aria-expanded")).toBe("true");
+  return trigger!;
+}
+
+beforeEach(async () => {
+  localStorage.clear();
+  useEditorUiStore.setState({
+    view: "editor",
+    layoutPreset: "default",
+    focusedPanel: "timeline",
+    maximizedPanel: null,
+    agentPanelVisible: false,
+    mediaPanelVisible: true,
+    inspectorPanelVisible: true,
+    fullscreen: false,
+  });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  await act(async () => root?.render(<ViewMenu />));
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+  vi.restoreAllMocks();
+});
+
+describe("ViewMenu aggregate command contract", () => {
+  it("commands_shortcuts_checked_state_and_disabled_rules", async () => {
+    expect(
+      APPLICATION_MENU_SPEC.map(({ group, id, accelerator, kind }) => [
+        group,
+        id,
+        accelerator ?? null,
+        kind,
+      ]),
+    ).toEqual([
+      ["app", "about", null, "predefined"],
+      ["app", "checkUpdates", null, "disabled"],
+      ["app", "settings", "CmdOrCtrl+,", "action"],
+      ["app", "quit", "CmdOrCtrl+Q", "predefined"],
+      ["file", "new", "CmdOrCtrl+N", "action"],
+      ["file", "open", "CmdOrCtrl+O", "action"],
+      ["file", "save", "CmdOrCtrl+S", "action"],
+      ["file", "saveAs", "CmdOrCtrl+Shift+S", "action"],
+      ["file", "importMedia", "CmdOrCtrl+I", "action"],
+      ["file", "export", "CmdOrCtrl+E", "action"],
+      ["edit", "undo", "CmdOrCtrl+Z", "action"],
+      ["edit", "redo", "CmdOrCtrl+Shift+Z", "action"],
+      ["edit", "cut", "CmdOrCtrl+X", "action"],
+      ["edit", "copy", "CmdOrCtrl+C", "action"],
+      ["edit", "paste", "CmdOrCtrl+V", "action"],
+      ["edit", "selectAll", "CmdOrCtrl+A", "action"],
+      ["edit", "split", "CmdOrCtrl+K", "action"],
+      ["edit", "trimStart", "Q", "action"],
+      ["edit", "trimEnd", "W", "action"],
+      ["edit", "delete", "Backspace", "action"],
+      ["view", "mediaPanel", "CmdOrCtrl+0", "check"],
+      ["view", "inspector", "CmdOrCtrl+Alt+0", "check"],
+      ["view", "agentPanel", "CmdOrCtrl+Alt+A", "check"],
+      ["view", "maximizeFocused", "`", "check"],
+      ["view", "layoutDefault", "CmdOrCtrl+1", "check"],
+      ["view", "layoutMedia", "CmdOrCtrl+2", "check"],
+      ["view", "layoutVertical", "CmdOrCtrl+3", "check"],
+      ["view", "fullscreen", "CmdOrCtrl+F", "check"],
+      ["help", "tutorial", null, "disabled"],
+      ["help", "shortcuts", "CmdOrCtrl+Shift+/", "action"],
+      ["help", "mcp", null, "action"],
+      ["help", "feedback", null, "disabled"],
+    ]);
+    expect(new Set(APPLICATION_MENU_SPEC.map((entry) => entry.id)).size).toBe(
+      APPLICATION_MENU_SPEC.length,
+    );
+
+    await act(async () => {
+      useProjectStore.setState({
+        projectPath: "/tmp/menu-contract.opentake",
+        compatibilityReadOnly: false,
+        canUndo: true,
+        canRedo: false,
+        timeline: {
+          fps: 30,
+          width: 1920,
+          height: 1080,
+          settingsConfigured: true,
+          tracks: [],
+        },
+      });
+      useClipboardStore.setState({ hasContent: true });
+      useMediaStore.setState({
+        items: [
+          {
+            id: "media-1",
+            name: "Media 1",
+            type: "video",
+            duration: 1,
+            hasAudio: false,
+            path: "/tmp/media-1.mp4",
+          },
+        ],
+      });
+      useEditorUiStore.setState({
+        focusedPanel: "media",
+        selectedMediaAssetIds: new Set(["media-1"]),
+        fullscreen: true,
+      });
+    });
+    const nativeState = applicationMenuStateSnapshot();
+    expect(nativeState.enabled).toMatchObject({
+      checkUpdates: false,
+      save: true,
+      saveAs: true,
+      importMedia: true,
+      export: false,
+      undo: true,
+      redo: false,
+      cut: true,
+      copy: true,
+      paste: true,
+      selectAll: true,
+      split: false,
+      trimStart: false,
+      trimEnd: false,
+      delete: true,
+      tutorial: false,
+      feedback: false,
+    });
+    expect(nativeState.checked).toMatchObject({
+      layoutDefault: true,
+      mediaPanel: true,
+      inspector: true,
+      agentPanel: false,
+      fullscreen: true,
+    });
+    await act(async () => runApplicationMenuCommand("shortcuts"));
+    expect(useEditorUiStore.getState()).toMatchObject({
+      settingsOpen: true,
+      settingsPane: "shortcuts",
+    });
+    await act(async () => runApplicationMenuCommand("mcp"));
+    expect(useEditorUiStore.getState().settingsPane).toBe("mcp");
+    await act(async () =>
+      useEditorUiStore.setState({
+        settingsOpen: false,
+        settingsPane: "general",
+        focusedPanel: "timeline",
+        selectedMediaAssetIds: new Set(),
+        fullscreen: false,
+      }),
+    );
+
+    const trigger = await openMenu();
+
+    const expected = [
+      ["view.mediaPanel", "⌘0", "true"],
+      ["view.inspector", "⌘⌥0", "true"],
+      ["view.agentPanel", "⌘⌥A", "false"],
+      ["view.maximizeFocused", "`", "false"],
+      ["view.layoutDefault", "⌘1", "true"],
+      ["view.layoutMedia", "⌘2", "false"],
+      ["view.layoutVertical", "⌘3", "false"],
+      ["view.enterFullScreen", "⌘F", "false"],
+    ] as const;
+
+    for (const [label, shortcut, checked] of expected) {
+      const item = menuItem(label);
+      expect(item.textContent).toContain(shortcut);
+      expect(item.getAttribute("aria-checked")).toBe(checked);
+    }
+
+    // Opening the menu moves keyboard focus into the command list. Arrow keys
+    // navigate enabled entries and Escape restores focus to the trigger.
+    expect(document.activeElement).toBe(menuItem("view.mediaPanel"));
+    await act(async () =>
+      document.activeElement?.dispatchEvent(
+        new KeyboardEvent("keydown", { key: "ArrowDown", bubbles: true }),
+      ),
+    );
+    expect(document.activeElement).toBe(menuItem("view.inspector"));
+
+    await act(async () => menuItem("view.maximizeFocused").click());
+    expect(useEditorUiStore.getState().maximizedPanel).toBe("timeline");
+    expect(menuItem("view.maximizeFocused").getAttribute("aria-checked")).toBe("true");
+
+    const editorEscape = vi.fn();
+    window.addEventListener("keydown", editorEscape);
+    await act(async () => window.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape" })));
+    window.removeEventListener("keydown", editorEscape);
+    expect(trigger.getAttribute("aria-expanded")).toBe("false");
+    expect(document.activeElement).toBe(trigger);
+    expect(useEditorUiStore.getState().maximizedPanel).toBe("timeline");
+    expect(editorEscape).not.toHaveBeenCalled();
+
+    // There is no legal maximize target without a focused panel. The item must
+    // be explicitly disabled and activation must be a no-op.
+    await act(async () => useEditorUiStore.setState({ focusedPanel: null, maximizedPanel: null }));
+    await openMenu();
+    const maximize = menuItem("view.maximizeFocused");
+    expect(maximize.disabled).toBe(true);
+    await act(async () => maximize.click());
+    expect(useEditorUiStore.getState().maximizedPanel).toBeNull();
+
+    const calls: string[] = [];
+    const shortcutUi = {
+      view: "editor" as const,
+      setLayoutPreset: (preset: "default" | "media" | "vertical") =>
+        calls.push(`layout:${preset}`),
+      toggleAgentPanel: () => calls.push("agent"),
+      toggleMediaPanel: () => calls.push("media"),
+      toggleInspectorPanel: () => calls.push("inspector"),
+      toggleMaximizedFocusedPanel: () => calls.push("maximize"),
+      toggleFullscreen: async () => {
+        calls.push("fullscreen");
+      },
+    };
+    const shortcuts = [
+      new KeyboardEvent("keydown", { code: "Digit0", metaKey: true, cancelable: true }),
+      new KeyboardEvent("keydown", {
+        code: "Digit0",
+        metaKey: true,
+        altKey: true,
+        cancelable: true,
+      }),
+      new KeyboardEvent("keydown", {
+        code: "KeyA",
+        metaKey: true,
+        altKey: true,
+        cancelable: true,
+      }),
+      new KeyboardEvent("keydown", { code: "Backquote", cancelable: true }),
+      new KeyboardEvent("keydown", { code: "Digit1", ctrlKey: true, cancelable: true }),
+      new KeyboardEvent("keydown", { code: "Digit2", metaKey: true, cancelable: true }),
+      new KeyboardEvent("keydown", { code: "Digit3", metaKey: true, cancelable: true }),
+      new KeyboardEvent("keydown", { code: "KeyF", metaKey: true, cancelable: true }),
+    ];
+
+    for (const event of shortcuts) {
+      expect(handleViewShortcutKeyDown(event, shortcutUi)).toBe(true);
+      expect(event.defaultPrevented).toBe(true);
+    }
+    expect(calls).toEqual([
+      "media",
+      "inspector",
+      "agent",
+      "maximize",
+      "layout:default",
+      "layout:media",
+      "layout:vertical",
+      "fullscreen",
+    ]);
+
+    // A repeat is consumed but must not oscillate state; text-entry and Home
+    // events remain available to their native owners.
+    expect(
+      handleViewShortcutKeyDown(
+        new KeyboardEvent("keydown", { code: "Digit0", metaKey: true, repeat: true }),
+        shortcutUi,
+      ),
+    ).toBe(true);
+    expect(calls).toHaveLength(8);
+    expect(
+      handleViewShortcutKeyDown(
+        {
+          code: "Digit0",
+          metaKey: true,
+          ctrlKey: false,
+          altKey: false,
+          shiftKey: false,
+          repeat: false,
+          target: document.createElement("input"),
+          preventDefault: vi.fn(),
+        } as unknown as KeyboardEvent,
+        shortcutUi,
+      ),
+    ).toBe(false);
+
+    useEditorUiStore.setState({
+      focusedPanel: "media",
+      maximizedPanel: "media",
+      mediaPanelVisible: true,
+    });
+    useEditorUiStore.getState().toggleMediaPanel();
+    expect(useEditorUiStore.getState()).toMatchObject({
+      focusedPanel: "timeline",
+      maximizedPanel: null,
+      mediaPanelVisible: false,
+    });
+
+    const originalRequestFullscreen = document.documentElement.requestFullscreen;
+    Object.defineProperty(document.documentElement, "requestFullscreen", {
+      configurable: true,
+      value: vi.fn().mockRejectedValue(new Error("host rejected fullscreen")),
+    });
+    useEditorUiStore.setState({ fullscreen: false, toast: null });
+    await useEditorUiStore.getState().toggleFullscreen();
+    expect(useEditorUiStore.getState().toast?.message).toBe("view.fullscreenFailed");
+    Object.defineProperty(document.documentElement, "requestFullscreen", {
+      configurable: true,
+      value: originalRequestFullscreen,
+    });
+  });
+});
diff --git a/web/src/components/shell/ViewMenu.tsx b/web/src/components/shell/ViewMenu.tsx
index 468fde79..cbe00941 100644
--- a/web/src/components/shell/ViewMenu.tsx
+++ b/web/src/components/shell/ViewMenu.tsx
@@ -7,10 +7,81 @@
  */
 
 import { useEffect, useRef, useState } from "react";
-import { Bot, Menu, PanelLeft, PanelRight, Columns3, Check } from "lucide-react";
+import {
+  Bot,
+  Menu,
+  PanelLeft,
+  PanelRight,
+  Columns3,
+  Check,
+  Maximize2,
+  Fullscreen,
+  type LucideIcon,
+} from "lucide-react";
 import { Icon } from "../ui/Icon";
 import { useEditorUiStore, type LayoutPreset } from "../../store/uiStore";
-import { useT } from "../../i18n";
+import { t, useI18nStore, useT } from "../../i18n";
+import { isTauri } from "../../lib/api";
+import { useProjectStore } from "../../store/projectStore";
+import { useClipboardStore } from "../../store/clipboardStore";
+import { useMediaStore } from "../../store/mediaStore";
+import * as edit from "../../store/editActions";
+import {
+  newProjectAndEnter,
+  openProjectViaDialog,
+  saveCurrentProject,
+  saveCurrentProjectAs,
+} from "../../store/projectActions";
+import { importFilesViaDialog } from "../../store/mediaActions";
+
+export type ApplicationMenuKind = "action" | "check" | "predefined" | "disabled";
+export type ApplicationMenuGroup = "app" | "file" | "edit" | "view" | "help";
+
+export interface ApplicationMenuSpecEntry {
+  group: ApplicationMenuGroup;
+  id: string;
+  labelKey: string;
+  accelerator?: string;
+  kind: ApplicationMenuKind;
+}
+
+/** Auditable §2.9 command matrix. This drives the packaged native menu rather
+ *  than maintaining a second, implicit list that can drift from the in-app
+ *  View menu or its keyboard handlers. */
+export const APPLICATION_MENU_SPEC: readonly ApplicationMenuSpecEntry[] = [
+  { group: "app", id: "about", labelKey: "menu.about", kind: "predefined" },
+  { group: "app", id: "checkUpdates", labelKey: "menu.checkUpdates", kind: "disabled" },
+  { group: "app", id: "settings", labelKey: "settings.title", accelerator: "CmdOrCtrl+,", kind: "action" },
+  { group: "app", id: "quit", labelKey: "menu.quit", accelerator: "CmdOrCtrl+Q", kind: "predefined" },
+  { group: "file", id: "new", labelKey: "menu.new", accelerator: "CmdOrCtrl+N", kind: "action" },
+  { group: "file", id: "open", labelKey: "menu.open", accelerator: "CmdOrCtrl+O", kind: "action" },
+  { group: "file", id: "save", labelKey: "menu.save", accelerator: "CmdOrCtrl+S", kind: "action" },
+  { group: "file", id: "saveAs", labelKey: "menu.saveAs", accelerator: "CmdOrCtrl+Shift+S", kind: "action" },
+  { group: "file", id: "importMedia", labelKey: "menu.importMedia", accelerator: "CmdOrCtrl+I", kind: "action" },
+  { group: "file", id: "export", labelKey: "menu.export", accelerator: "CmdOrCtrl+E", kind: "action" },
+  { group: "edit", id: "undo", labelKey: "menu.undo", accelerator: "CmdOrCtrl+Z", kind: "action" },
+  { group: "edit", id: "redo", labelKey: "menu.redo", accelerator: "CmdOrCtrl+Shift+Z", kind: "action" },
+  { group: "edit", id: "cut", labelKey: "menu.cut", accelerator: "CmdOrCtrl+X", kind: "action" },
+  { group: "edit", id: "copy", labelKey: "menu.copy", accelerator: "CmdOrCtrl+C", kind: "action" },
+  { group: "edit", id: "paste", labelKey: "menu.paste", accelerator: "CmdOrCtrl+V", kind: "action" },
+  { group: "edit", id: "selectAll", labelKey: "menu.selectAll", accelerator: "CmdOrCtrl+A", kind: "action" },
+  { group: "edit", id: "split", labelKey: "menu.split", accelerator: "CmdOrCtrl+K", kind: "action" },
+  { group: "edit", id: "trimStart", labelKey: "menu.trimStart", accelerator: "Q", kind: "action" },
+  { group: "edit", id: "trimEnd", labelKey: "menu.trimEnd", accelerator: "W", kind: "action" },
+  { group: "edit", id: "delete", labelKey: "menu.delete", accelerator: "Backspace", kind: "action" },
+  { group: "view", id: "mediaPanel", labelKey: "view.mediaPanel", accelerator: "CmdOrCtrl+0", kind: "check" },
+  { group: "view", id: "inspector", labelKey: "view.inspector", accelerator: "CmdOrCtrl+Alt+0", kind: "check" },
+  { group: "view", id: "agentPanel", labelKey: "view.agentPanel", accelerator: "CmdOrCtrl+Alt+A", kind: "check" },
+  { group: "view", id: "maximizeFocused", labelKey: "view.maximizeFocused", accelerator: "`", kind: "check" },
+  { group: "view", id: "layoutDefault", labelKey: "view.layoutDefault", accelerator: "CmdOrCtrl+1", kind: "check" },
+  { group: "view", id: "layoutMedia", labelKey: "view.layoutMedia", accelerator: "CmdOrCtrl+2", kind: "check" },
+  { group: "view", id: "layoutVertical", labelKey: "view.layoutVertical", accelerator: "CmdOrCtrl+3", kind: "check" },
+  { group: "view", id: "fullscreen", labelKey: "view.enterFullScreen", accelerator: "CmdOrCtrl+F", kind: "check" },
+  { group: "help", id: "tutorial", labelKey: "menu.tutorial", kind: "disabled" },
+  { group: "help", id: "shortcuts", labelKey: "menu.shortcuts", accelerator: "CmdOrCtrl+Shift+/", kind: "action" },
+  { group: "help", id: "mcp", labelKey: "settings.section.mcp", kind: "action" },
+  { group: "help", id: "feedback", labelKey: "menu.feedback", kind: "disabled" },
+] as const;
 
 const PRESETS: Array<{ id: LayoutPreset; icon: typeof PanelLeft; labelKey: string; key: string }> = [
   { id: "default", icon: Columns3, labelKey: "view.layoutDefault", key: "⌘1" },
@@ -18,9 +89,411 @@ const PRESETS: Array<{ id: LayoutPreset; icon: typeof PanelLeft; labelKey: strin
   { id: "vertical", icon: PanelRight, labelKey: "view.layoutVertical", key: "⌘3" },
 ];
 
+function ignoreRejected(operation: Promise<unknown>): void {
+  void operation.catch(() => {
+    // Owning actions surface their own localized error/recovery state.
+  });
+}
+
+/** Route native-menu activation through the same actions as the visible UI and
+ *  global shortcut layer. Exported so the command boundary remains directly
+ *  testable without requiring an OS menu server. */
+export function runApplicationMenuCommand(id: string): void {
+  const ui = useEditorUiStore.getState();
+  switch (id) {
+    case "settings":
+      ui.openSettingsPane("general");
+      return;
+    case "new":
+      ignoreRejected(newProjectAndEnter());
+      return;
+    case "open":
+      ignoreRejected(openProjectViaDialog());
+      return;
+    case "save":
+      ignoreRejected(saveCurrentProject());
+      return;
+    case "saveAs":
+      ignoreRejected(saveCurrentProjectAs());
+      return;
+    case "importMedia":
+      ignoreRejected(importFilesViaDialog());
+      return;
+    case "export":
+      ui.setExportDialogOpen(true);
+      return;
+    case "undo":
+      ignoreRejected(edit.undo());
+      return;
+    case "redo":
+      ignoreRejected(edit.redo());
+      return;
+    case "cut":
+      ignoreRejected(edit.cutClips());
+      return;
+    case "copy":
+      edit.copyClips();
+      return;
+    case "paste":
+      ignoreRejected(edit.pasteClipsAtPlayhead());
+      return;
+    case "selectAll": {
+      if (ui.focusedPanel === "media") {
+        ui.selectMediaAssets(new Set(useMediaStore.getState().items.map((item) => item.id)));
+      } else {
+        const ids = useProjectStore
+          .getState()
+          .timeline.tracks.flatMap((track) => track.clips.map((clip) => clip.id));
+        ui.selectClips(new Set(ids));
+      }
+      return;
+    }
+    case "split":
+      ignoreRejected(edit.splitAtPlayhead());
+      return;
+    case "trimStart":
+      ignoreRejected(edit.trimStartToPlayhead());
+      return;
+    case "trimEnd":
+      ignoreRejected(edit.trimEndToPlayhead());
+      return;
+    case "delete":
+      if (ui.focusedPanel === "media") {
+        ignoreRejected(edit.deleteMedia([...ui.selectedMediaAssetIds]));
+      } else {
+        ignoreRejected(edit.deleteSelectedClips());
+      }
+      return;
+    case "mediaPanel":
+      ui.toggleMediaPanel();
+      return;
+    case "inspector":
+      ui.toggleInspectorPanel();
+      return;
+    case "agentPanel":
+      ui.toggleAgentPanel();
+      return;
+    case "maximizeFocused":
+      ui.toggleMaximizedFocusedPanel();
+      return;
+    case "layoutDefault":
+      ui.setLayoutPreset("default");
+      return;
+    case "layoutMedia":
+      ui.setLayoutPreset("media");
+      return;
+    case "layoutVertical":
+      ui.setLayoutPreset("vertical");
+      return;
+    case "fullscreen":
+      ignoreRejected(ui.toggleFullscreen());
+      return;
+    case "shortcuts":
+      ui.openSettingsPane("shortcuts");
+      return;
+    case "mcp":
+      ui.openSettingsPane("mcp");
+      return;
+  }
+}
+
+interface NativeMenuItemHandle {
+  setEnabled: (enabled: boolean) => Promise<void>;
+  setText: (text: string) => Promise<void>;
+}
+
+interface NativeCheckMenuItemHandle extends NativeMenuItemHandle {
+  setChecked: (checked: boolean) => Promise<void>;
+}
+
+interface NativeApplicationMenuHandles {
+  items: Map<string, NativeMenuItemHandle>;
+  checks: Map<string, NativeCheckMenuItemHandle>;
+  texts: Map<string, { item: Pick<NativeMenuItemHandle, "setText">; labelKey: string }>;
+}
+
+export interface ApplicationMenuStateSnapshot {
+  enabled: Readonly<Record<string, boolean>>;
+  checked: Readonly<Record<string, boolean>>;
+}
+
+function nativeAccelerator(entry: ApplicationMenuSpecEntry): string | undefined {
+  if (entry.id === "settings") return "CmdOrCtrl+Comma";
+  if (entry.id === "maximizeFocused") return "Backquote";
+  if (entry.id === "shortcuts") return "CmdOrCtrl+Shift+Slash";
+  return entry.accelerator;
+}
+
+export function applicationMenuStateSnapshot(): ApplicationMenuStateSnapshot {
+  const ui = useEditorUiStore.getState();
+  const project = useProjectStore.getState();
+  const clipboard = useClipboardStore.getState();
+  const media = useMediaStore.getState();
+  const editor = ui.view === "editor";
+  const hasClips = project.timeline.tracks.some((track) => track.clips.length > 0);
+  const clipSelection = ui.selectedClipIds.size > 0;
+  const mediaSelection = ui.selectedMediaAssetIds.size > 0;
+  const selection = ui.focusedPanel === "media" ? mediaSelection : clipSelection;
+  const anySelectable = ui.focusedPanel === "media" ? media.items.length > 0 : hasClips;
+  const mutableProject = editor && Boolean(project.projectPath) && !project.compatibilityReadOnly;
+
+  const enabled: Record<string, boolean> = {
+    checkUpdates: false,
+    save: mutableProject,
+    saveAs: mutableProject,
+    importMedia: mutableProject,
+    export: editor && hasClips,
+    undo: editor && project.canUndo,
+    redo: editor && project.canRedo,
+    cut: editor && selection,
+    copy: editor && selection,
+    paste: editor && clipboard.hasContent,
+    selectAll: editor && anySelectable,
+    split: editor && hasClips,
+    trimStart: editor && clipSelection,
+    trimEnd: editor && clipSelection,
+    delete: editor && selection,
+    mediaPanel: editor,
+    inspector: editor,
+    agentPanel: editor,
+    maximizeFocused: editor && ui.focusedPanel !== null,
+    layoutDefault: editor,
+    layoutMedia: editor,
+    layoutVertical: editor,
+    fullscreen: editor,
+    tutorial: false,
+    feedback: false,
+  };
+  const checked: Record<string, boolean> = {
+    mediaPanel: ui.mediaPanelVisible,
+    inspector: ui.inspectorPanelVisible,
+    agentPanel: ui.agentPanelVisible,
+    maximizeFocused: ui.maximizedPanel !== null,
+    layoutDefault: ui.layoutPreset === "default",
+    layoutMedia: ui.layoutPreset === "media",
+    layoutVertical: ui.layoutPreset === "vertical",
+    fullscreen: ui.fullscreen,
+  };
+  return { enabled, checked };
+}
+
+async function applyNativeApplicationMenuState(
+  handles: NativeApplicationMenuHandles,
+  { enabled, checked }: ApplicationMenuStateSnapshot,
+): Promise<void> {
+  await Promise.all(
+    [...handles.items].map(([id, item]) =>
+      id in enabled ? item.setEnabled(enabled[id]!) : Promise.resolve(),
+    ),
+  );
+  await Promise.all(
+    [...handles.checks].map(([id, item]) => item.setChecked(Boolean(checked[id]))),
+  );
+}
+
+async function applyNativeApplicationMenuText(
+  handles: NativeApplicationMenuHandles,
+): Promise<void> {
+  await Promise.all(
+    [...handles.texts.values()].map(({ item, labelKey }) => item.setText(t(labelKey))),
+  );
+}
+
+async function installNativeApplicationMenu(): Promise<() => void> {
+  const { Menu, Submenu, MenuItem, CheckMenuItem, PredefinedMenuItem } =
+    await import("@tauri-apps/api/menu");
+  const handles: NativeApplicationMenuHandles = {
+    items: new Map(),
+    checks: new Map(),
+    texts: new Map(),
+  };
+  const entries = new Map(APPLICATION_MENU_SPEC.map((entry) => [entry.id, entry]));
+
+  const actionItem = async (id: string) => {
+    const entry = entries.get(id)!;
+    const item = await MenuItem.new({
+      id,
+      text: t(entry.labelKey),
+      enabled: entry.kind !== "disabled",
+      accelerator: nativeAccelerator(entry),
+      action: () => runApplicationMenuCommand(id),
+    });
+    handles.items.set(id, item);
+    handles.texts.set(id, { item, labelKey: entry.labelKey });
+    return item;
+  };
+  const checkItem = async (id: string) => {
+    const entry = entries.get(id)!;
+    const item = await CheckMenuItem.new({
+      id,
+      text: t(entry.labelKey),
+      checked: false,
+      accelerator: nativeAccelerator(entry),
+      action: () => runApplicationMenuCommand(id),
+    });
+    handles.items.set(id, item);
+    handles.checks.set(id, item);
+    handles.texts.set(id, { item, labelKey: entry.labelKey });
+    return item;
+  };
+  const separator = () => PredefinedMenuItem.new({ item: "Separator" });
+
+  const aboutItem = await PredefinedMenuItem.new({
+    item: { About: { name: t("app.name"), version: __APP_VERSION__ } },
+    text: t("menu.about"),
+  });
+  handles.texts.set("about", { item: aboutItem, labelKey: "menu.about" });
+  const quitItem = await PredefinedMenuItem.new({ item: "Quit", text: t("menu.quit") });
+  handles.texts.set("quit", { item: quitItem, labelKey: "menu.quit" });
+
+  const appMenu = await Submenu.new({
+    id: "app",
+    text: t("app.name"),
+    items: [
+      aboutItem,
+      await actionItem("checkUpdates"),
+      await actionItem("settings"),
+      await separator(),
+      quitItem,
+    ],
+  });
+  handles.texts.set("group:app", { item: appMenu, labelKey: "app.name" });
+  const fileMenu = await Submenu.new({
+    id: "file",
+    text: t("menu.file"),
+    items: [
+      await actionItem("new"),
+      await actionItem("open"),
+      await separator(),
+      await actionItem("save"),
+      await actionItem("saveAs"),
+      await separator(),
+      await actionItem("importMedia"),
+      await actionItem("export"),
+    ],
+  });
+  handles.texts.set("group:file", { item: fileMenu, labelKey: "menu.file" });
+  const editMenu = await Submenu.new({
+    id: "edit",
+    text: t("menu.edit"),
+    items: [
+      await actionItem("undo"),
+      await actionItem("redo"),
+      await separator(),
+      await actionItem("cut"),
+      await actionItem("copy"),
+      await actionItem("paste"),
+      await actionItem("selectAll"),
+      await separator(),
+      await actionItem("split"),
+      await actionItem("trimStart"),
+      await actionItem("trimEnd"),
+      await actionItem("delete"),
+    ],
+  });
+  handles.texts.set("group:edit", { item: editMenu, labelKey: "menu.edit" });
+  const layoutMenu = await Submenu.new({
+    id: "layout",
+    text: t("view.layout"),
+    items: [
+      await checkItem("layoutDefault"),
+      await checkItem("layoutMedia"),
+      await checkItem("layoutVertical"),
+    ],
+  });
+  handles.texts.set("group:layout", { item: layoutMenu, labelKey: "view.layout" });
+  const viewMenu = await Submenu.new({
+    id: "view",
+    text: t("view.menu"),
+    items: [
+      await checkItem("mediaPanel"),
+      await checkItem("inspector"),
+      await checkItem("agentPanel"),
+      await checkItem("maximizeFocused"),
+      await separator(),
+      layoutMenu,
+      await checkItem("fullscreen"),
+    ],
+  });
+  handles.texts.set("group:view", { item: viewMenu, labelKey: "view.menu" });
+  const helpMenu = await Submenu.new({
+    id: "help",
+    text: t("menu.help"),
+    items: [
+      await actionItem("tutorial"),
+      await actionItem("shortcuts"),
+      await actionItem("mcp"),
+      await separator(),
+      await actionItem("feedback"),
+    ],
+  });
+  handles.texts.set("group:help", { item: helpMenu, labelKey: "menu.help" });
+  const menu = await Menu.new({ items: [appMenu, fileMenu, editMenu, viewMenu, helpMenu] });
+  await menu.setAsAppMenu();
+
+  let syncQueue = Promise.resolve();
+  let stateSignature = "";
+  let localeSignature = "";
+  const syncState = () => {
+    const snapshot = applicationMenuStateSnapshot();
+    const nextSignature = JSON.stringify(snapshot);
+    if (nextSignature === stateSignature) return;
+    stateSignature = nextSignature;
+    syncQueue = syncQueue
+      .then(() => applyNativeApplicationMenuState(handles, snapshot))
+      .catch(() => {
+        stateSignature = "";
+      });
+  };
+  const syncText = () => {
+    const nextLocale = useI18nStore.getState().locale;
+    if (nextLocale === localeSignature) return;
+    localeSignature = nextLocale;
+    syncQueue = syncQueue.then(() => applyNativeApplicationMenuText(handles)).catch(() => {
+      localeSignature = "";
+    });
+  };
+  const unsubs = [
+    useEditorUiStore.subscribe(syncState),
+    useProjectStore.subscribe(syncState),
+    useClipboardStore.subscribe(syncState),
+    useMediaStore.subscribe(syncState),
+    useI18nStore.subscribe(syncText),
+  ];
+  syncState();
+  syncText();
+  return () => unsubs.forEach((unsubscribe) => unsubscribe());
+}
+
+/** Installs the full native application menu once for packaged Tauri builds.
+ *  The visual component is intentionally empty; ownership stays beside
+ *  ViewMenu because both surfaces share one command/check-state contract. */
+export function ApplicationMenuBridge() {
+  useEffect(() => {
+    if (!isTauri) return;
+    let disposed = false;
+    let cleanup: (() => void) | undefined;
+    void installNativeApplicationMenu()
+      .then((installedCleanup) => {
+        if (disposed) installedCleanup();
+        else cleanup = installedCleanup;
+      })
+      .catch(() => {
+        useEditorUiStore.getState().pushToast(t("menu.installFailed"));
+      });
+    return () => {
+      disposed = true;
+      cleanup?.();
+    };
+  }, []);
+  return null;
+}
+
 export function ViewMenu() {
   const [open, setOpen] = useState(false);
   const rootRef = useRef<HTMLDivElement>(null);
+  const triggerRef = useRef<HTMLButtonElement>(null);
+  const menuRef = useRef<HTMLDivElement>(null);
   const t = useT();
 
   const layoutPreset = useEditorUiStore((s) => s.layoutPreset);
@@ -31,6 +504,30 @@ export function ViewMenu() {
   const toggleInspector = useEditorUiStore((s) => s.toggleInspectorPanel);
   const agentVisible = useEditorUiStore((s) => s.agentPanelVisible);
   const toggleAgent = useEditorUiStore((s) => s.toggleAgentPanel);
+  const focusedPanel = useEditorUiStore((s) => s.focusedPanel);
+  const maximizedPanel = useEditorUiStore((s) => s.maximizedPanel);
+  const toggleMaximizedFocusedPanel = useEditorUiStore(
+    (s) => s.toggleMaximizedFocusedPanel,
+  );
+  const fullscreen = useEditorUiStore((s) => s.fullscreen);
+  const syncFullscreen = useEditorUiStore((s) => s.syncFullscreen);
+  const toggleFullscreen = useEditorUiStore((s) => s.toggleFullscreen);
+
+  const closeAndRestoreFocus = () => {
+    setOpen(false);
+    queueMicrotask(() => triggerRef.current?.focus());
+  };
+
+  useEffect(() => {
+    if (!open) return;
+    void syncFullscreen().catch(() => {
+      // A rejected native window query must not make the rest of the View menu
+      // unusable. Keep the last known checked state and leave every command live.
+    });
+    menuRef.current
+      ?.querySelector<HTMLButtonElement>('button:not(:disabled)')
+      ?.focus();
+  }, [open, syncFullscreen]);
 
   // Dismiss on outside click or Escape.
   useEffect(() => {
@@ -39,19 +536,26 @@ export function ViewMenu() {
       if (rootRef.current && !rootRef.current.contains(e.target as Node)) setOpen(false);
     };
     const onKey = (e: KeyboardEvent) => {
-      if (e.key === "Escape") setOpen(false);
+      if (e.key === "Escape") {
+        e.preventDefault();
+        // Consume Escape before the editor-wide handler sees it. Otherwise one
+        // keypress both dismisses this menu and exits a maximized panel.
+        e.stopImmediatePropagation();
+        closeAndRestoreFocus();
+      }
     };
     window.addEventListener("mousedown", onDown);
-    window.addEventListener("keydown", onKey);
+    window.addEventListener("keydown", onKey, true);
     return () => {
       window.removeEventListener("mousedown", onDown);
-      window.removeEventListener("keydown", onKey);
+      window.removeEventListener("keydown", onKey, true);
     };
   }, [open]);
 
   return (
     <div ref={rootRef} style={{ position: "relative", display: "inline-flex" }}>
       <button
+        ref={triggerRef}
         title={t("view.menu")}
         aria-label={t("view.menu")}
         aria-haspopup="menu"
@@ -73,7 +577,29 @@ export function ViewMenu() {
 
       {open && (
         <div
+          ref={menuRef}
           role="menu"
+          aria-label={t("view.menu")}
+          onKeyDown={(event) => {
+            if (!["ArrowDown", "ArrowUp", "Home", "End"].includes(event.key)) return;
+            event.preventDefault();
+            const items = [
+              ...(menuRef.current?.querySelectorAll<HTMLButtonElement>(
+                'button:not(:disabled)',
+              ) ?? []),
+            ];
+            if (items.length === 0) return;
+            const current = items.indexOf(document.activeElement as HTMLButtonElement);
+            const next =
+              event.key === "Home"
+                ? 0
+                : event.key === "End"
+                  ? items.length - 1
+                  : event.key === "ArrowDown"
+                    ? (Math.max(current, -1) + 1) % items.length
+                    : (current <= 0 ? items.length : current) - 1;
+            items[next]?.focus();
+          }}
           style={{
             position: "absolute",
             top: "calc(100% + 6px)",
@@ -87,6 +613,39 @@ export function ViewMenu() {
             zIndex: 200,
           }}
         >
+          <MenuSectionLabel>{t("view.panels")}</MenuSectionLabel>
+          <MenuItem
+            icon={PanelLeft}
+            label={t("view.mediaPanel")}
+            shortcut="⌘0"
+            checked={mediaVisible}
+            onClick={toggleMedia}
+          />
+          <MenuItem
+            icon={PanelRight}
+            label={t("view.inspector")}
+            shortcut="⌘⌥0"
+            checked={inspectorVisible}
+            onClick={toggleInspector}
+          />
+          <MenuItem
+            icon={Bot}
+            label={t("view.agentPanel")}
+            shortcut="⌘⌥A"
+            checked={agentVisible}
+            onClick={toggleAgent}
+          />
+          <MenuItem
+            icon={Maximize2}
+            label={t("view.maximizeFocused")}
+            shortcut="`"
+            checked={maximizedPanel !== null}
+            disabled={focusedPanel === null}
+            onClick={toggleMaximizedFocusedPanel}
+          />
+
+          <MenuDivider />
+
           <MenuSectionLabel>{t("view.layout")}</MenuSectionLabel>
           {PRESETS.map((p) => (
             <MenuItem
@@ -104,27 +663,16 @@ export function ViewMenu() {
 
           <MenuDivider />
 
-          <MenuSectionLabel>{t("view.panels")}</MenuSectionLabel>
-          <MenuItem
-            icon={Bot}
-            label={t("view.agentPanel")}
-            shortcut="⌘⌥A"
-            checked={agentVisible}
-            onClick={toggleAgent}
-          />
           <MenuItem
-            icon={PanelLeft}
-            label={t("view.mediaPanel")}
-            shortcut="⌘0"
-            checked={mediaVisible}
-            onClick={toggleMedia}
-          />
-          <MenuItem
-            icon={PanelRight}
-            label={t("view.inspector")}
-            shortcut="⌘⌥0"
-            checked={inspectorVisible}
-            onClick={toggleInspector}
+            icon={Fullscreen}
+            label={t("view.enterFullScreen")}
+            shortcut="⌘F"
+            checked={fullscreen}
+            onClick={() => {
+              void toggleFullscreen().catch(() => {
+                // Keep the menu usable if the host rejects a fullscreen request.
+              });
+            }}
           />
         </div>
       )}
@@ -166,12 +714,14 @@ function MenuItem({
   label,
   shortcut,
   checked,
+  disabled = false,
   onClick,
 }: {
-  icon: typeof PanelLeft;
+  icon: LucideIcon;
   label: string;
   shortcut: string;
   checked: boolean;
+  disabled?: boolean;
   onClick: () => void;
 }) {
   return (
@@ -179,8 +729,9 @@ function MenuItem({
       type="button"
       role="menuitemcheckbox"
       aria-checked={checked}
+      disabled={disabled}
       onClick={onClick}
-      className="hover-area"
+      className={disabled ? undefined : "hover-area"}
       style={{
         width: "100%",
         display: "flex",
@@ -189,10 +740,16 @@ function MenuItem({
         height: 28,
         padding: "0 var(--space-sm)",
         borderRadius: "var(--radius-sm)",
-        color: checked ? "var(--text-primary)" : "var(--text-secondary)",
+        color: disabled
+          ? "var(--text-muted)"
+          : checked
+            ? "var(--text-primary)"
+            : "var(--text-secondary)",
         fontSize: "var(--fs-sm)",
         fontWeight: "var(--fw-medium)",
         textAlign: "left",
+        cursor: disabled ? "default" : "pointer",
+        opacity: disabled ? 0.45 : 1,
       }}
     >
       <span style={{ display: "inline-flex", width: 14, justifyContent: "center" }}>
diff --git a/web/src/components/timeline/ClipContextMenu.tsx b/web/src/components/timeline/ClipContextMenu.tsx
index 03a84b08..60490e1d 100644
--- a/web/src/components/timeline/ClipContextMenu.tsx
+++ b/web/src/components/timeline/ClipContextMenu.tsx
@@ -219,7 +219,13 @@ export function ClipContextMenu({
   onClose: () => void;
 }) {
   const t = useT();
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const enterNestedSequence = useEditorUiStore((s) => s.enterNestedSequence);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
   const selectedClipIds = useEditorUiStore((s) => s.selectedClipIds);
   const selectClips = useEditorUiStore((s) => s.selectClips);
   const setPendingSwapClipId = useEditorUiStore((s) => s.setPendingSwapClipId);
@@ -342,6 +348,42 @@ export function ClipContextMenu({
         tooLong: currentClip.durationFrames > Math.round(timeline.fps * 60),
       },
     });
+    if (activeNestedSequenceId) {
+      const rootOnlyLabels = new Set([
+        t("contextMenu.freezeFrame"),
+        t("contextMenu.saveAsMedia"),
+      ]);
+      items = items.filter((item) => !rootOnlyLabels.has(item.label));
+    }
+    if (currentClip.nestedSequenceId) {
+      const mediaOnlyLabels = new Set([
+        t("contextMenu.swapMedia"),
+        t("contextMenu.freezeFrame"),
+        t("contextMenu.reverse"),
+        t("contextMenu.reverseOn"),
+        t("contextMenu.reverseTooLong"),
+        t("contextMenu.saveAsMedia"),
+      ]);
+      items = items.filter((item) => !mediaOnlyLabels.has(item.label));
+      items.unshift({
+        label: t("contextMenu.openCompound"),
+        action: () => enterNestedSequence(currentClip.nestedSequenceId!),
+      });
+      if (!activeNestedSequenceId) {
+        items.push({
+          label: t("contextMenu.dissolveCompound"),
+          action: () => void edit.dissolveNestedSequence(clipId),
+        });
+      }
+    } else if (!activeNestedSequenceId) {
+      items.push({
+        label: t("contextMenu.createCompound"),
+        action: () => {
+          ensureSelected();
+          void edit.createNestedSequence(t("compound.defaultName"));
+        },
+      });
+    }
   }
   if (range) {
     items.push(
diff --git a/web/src/components/timeline/TimelineContainer.tsx b/web/src/components/timeline/TimelineContainer.tsx
index 0d6ebaaa..ed4dd5cc 100644
--- a/web/src/components/timeline/TimelineContainer.tsx
+++ b/web/src/components/timeline/TimelineContainer.tsx
@@ -105,6 +105,28 @@ type DragState =
     }
   | null;
 
+export interface TimelineCursorState {
+  toolMode: "pointer" | "razor";
+  inRuler?: boolean;
+  shiftKey?: boolean;
+  hitRegion?: ClipHit["region"];
+  dragKind?: Exclude<DragState, null>["kind"];
+  disabled?: boolean;
+}
+
+/** One auditable cursor projection for the canvas interaction state. */
+export function timelineInteractionCursor(state: TimelineCursorState): string {
+  if (state.disabled) return "not-allowed";
+  if (state.dragKind === "move" || state.dragKind === "scrub") return "grabbing";
+  if (state.dragKind === "trimLeft" || state.dragKind === "trimRight") return "ew-resize";
+  if (state.dragKind === "marquee") return "crosshair";
+  if (state.inRuler) return state.shiftKey ? "crosshair" : "pointer";
+  if (state.toolMode === "razor") return "crosshair";
+  if (state.hitRegion === "trimLeft" || state.hitRegion === "trimRight") return "ew-resize";
+  if (state.hitRegion === "body") return "grab";
+  return "default";
+}
+
 type TimelineContextMenu =
   | {
       kind: "clip";
@@ -587,7 +609,18 @@ function moveParticipantsForIds(timeline: Timeline, ids: string[]): MoveParticip
 }
 
 export function TimelineContainer() {
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const compatibilityReadOnly = useProjectStore((s) => s.compatibilityReadOnly);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const enterNestedSequence = useEditorUiStore((s) => s.enterNestedSequence);
+  const exitNestedSequence = useEditorUiStore((s) => s.exitNestedSequence);
+  const timeline = useMemo(
+    () =>
+      rootTimeline.nestedSequences?.find(
+        (sequence) => sequence.id === activeNestedSequenceId,
+      )?.timeline ?? rootTimeline,
+    [rootTimeline, activeNestedSequenceId],
+  );
   const projectEpoch = useProjectStore((s) => s.projectEpoch);
   const zoomScale = useEditorUiStore((s) => s.zoomScale);
   const setZoomScale = useEditorUiStore((s) => s.setZoomScale);
@@ -610,6 +643,16 @@ export function TimelineContainer() {
   const selectGap = useEditorUiStore((s) => s.selectGap);
   const trackHeights = useEditorUiStore((s) => s.trackDisplayHeights);
   const mediaItems = useMediaStore((s) => s.items);
+  const [canvasCursor, setCanvasCursor] = useState("default");
+
+  useEffect(() => {
+    if (
+      activeNestedSequenceId &&
+      !rootTimeline.nestedSequences?.some((sequence) => sequence.id === activeNestedSequenceId)
+    ) {
+      exitNestedSequence();
+    }
+  }, [activeNestedSequenceId, rootTimeline.nestedSequences, exitNestedSequence]);
 
   // Asset ids whose source file is offline → clips referencing them get the
   // error wash. Recomputed when the catalog changes (so a relink clears it).
@@ -1317,6 +1360,7 @@ export function TimelineContainer() {
       // Ruler -> scrub playhead.
       if (inRuler) {
         dragRef.current = { kind: "scrub" };
+        setCanvasCursor("grabbing");
         scrubSnapRef.current = null;
         setScrubbing(true);
         updateRulerScrubFrame(docX);
@@ -1337,6 +1381,15 @@ export function TimelineContainer() {
           ? fadeKneeHit(timeline, docX, docY, zoomScale, trackHeights)
           : null;
 
+      // Compatibility-read-only projects remain selectable and scrubbable, but
+      // no canvas edit gesture may start behind the disabled cursor.
+      if (compatibilityReadOnly && hit) {
+        selectClips(clipSelectionForInteraction(timeline, selectedClipIds, hit.clip.id, e));
+        dragRef.current = null;
+        setCanvasCursor("not-allowed");
+        return;
+      }
+
       // Razor tool + clip -> split at the (snapped) click frame. Snapping to
       // clip edges / playhead matches upstream's razor (a cut landing on the
       // clip's own edge is a backend no-op, which is fine).
@@ -1463,14 +1516,38 @@ export function TimelineContainer() {
       updateRulerScrubFrame,
       docWidth,
       docHeight,
+      compatibilityReadOnly,
     ],
   );
 
   const onPointerMove = useCallback(
     (e: React.PointerEvent) => {
       const d = dragRef.current;
-      if (!d) return;
-      const { docX, docY } = toDoc(e);
+      const { docX, docY, inRuler } = toDoc(e);
+      if (!d) {
+        const hit = inRuler
+          ? null
+          : hitTestAccessibleClip(
+              timeline,
+              docX,
+              docY,
+              zoomScale,
+              trackHeights,
+              docWidth,
+              docHeight,
+            );
+        setCanvasCursor(
+          timelineInteractionCursor({
+            toolMode,
+            inRuler,
+            shiftKey: e.shiftKey,
+            hitRegion: hit?.region,
+            disabled: compatibilityReadOnly && Boolean(hit),
+          }),
+        );
+        return;
+      }
+      setCanvasCursor(timelineInteractionCursor({ toolMode, dragKind: d.kind }));
 
       if (d.kind === "scrub") {
         // Interactive moves update only the playhead. The settled Rust
@@ -1616,7 +1693,20 @@ export function TimelineContainer() {
         forceTick((n) => n + 1);
       }
     },
-    [toDoc, zoomScale, timeline, trackHeights, activeFrame, setCurrentFrame, selectClips, updateRulerScrubFrame],
+    [
+      toDoc,
+      zoomScale,
+      timeline,
+      trackHeights,
+      activeFrame,
+      setCurrentFrame,
+      selectClips,
+      updateRulerScrubFrame,
+      docWidth,
+      docHeight,
+      toolMode,
+      compatibilityReadOnly,
+    ],
   );
 
   // Abandon an in-progress drag WITHOUT committing — fires on pointercancel (a
@@ -1630,6 +1720,7 @@ export function TimelineContainer() {
     setSnapFrame(null);
     maybeSnapFeedback(null); // re-arm snap feedback for the next gesture
     setScrubbing(false);
+    setCanvasCursor("default");
     const el = e.currentTarget as HTMLElement;
     if (el.hasPointerCapture?.(e.pointerId)) el.releasePointerCapture(e.pointerId);
   }, []);
@@ -1641,6 +1732,7 @@ export function TimelineContainer() {
       snapStateRef.current = null;
       setSnapFrame(null);
       setScrubbing(false);
+      setCanvasCursor("default");
       (e.currentTarget as HTMLElement).releasePointerCapture(e.pointerId);
       if (!d) return;
 
@@ -1902,6 +1994,26 @@ export function TimelineContainer() {
     ],
   );
 
+  const onDoubleClick = useCallback(
+    (event: React.MouseEvent) => {
+      const { docX, docY } = toDoc(event);
+      const hit = hitTestAccessibleClip(
+        timeline,
+        docX,
+        docY,
+        zoomScale,
+        trackHeights,
+        docWidth,
+        docHeight,
+      );
+      if (hit?.clip.nestedSequenceId) {
+        event.preventDefault();
+        enterNestedSequence(hit.clip.nestedSequenceId);
+      }
+    },
+    [toDoc, timeline, zoomScale, trackHeights, docWidth, docHeight, enterNestedSequence],
+  );
+
   // Media dropped from the panel lands AT the cursor: its start frame = the drop
   // X, on the track under the drop Y. `addMediaToTimelineAt` skips tracks where it
   // would overlap an existing clip (and makes a new track if none is free), so a
@@ -2095,14 +2207,18 @@ export function TimelineContainer() {
         onPointerMove={onPointerMove}
         onPointerUp={onPointerUp}
         onContextMenu={onContextMenu}
+        onDoubleClick={onDoubleClick}
         onPointerCancel={endDrag}
         onLostPointerCapture={endDrag}
+        onPointerLeave={() => {
+          if (!dragRef.current) setCanvasCursor("default");
+        }}
         style={{
           position: "absolute",
           left: LAYOUT.trackHeaderWidth,
           top: 0,
           touchAction: "none",
-          cursor: toolMode === "razor" ? "crosshair" : "default",
+          cursor: canvasCursor,
         }}
       />
 
@@ -2253,7 +2369,12 @@ function AudioVolumeKeyframeContextMenu({
   onClose: () => void;
 }) {
   const t = useT();
-  const timeline = useProjectStore((s) => s.timeline);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const timeline =
+    rootTimeline.nestedSequences?.find(
+      (sequence) => sequence.id === activeNestedSequenceId,
+    )?.timeline ?? rootTimeline;
   const ref = useRef<HTMLDivElement>(null);
   const [pos, setPos] = useState({ left: x, top: y });
   const currentInterpolation = findVolumeKeyframeInterpolation(timeline, clipId, frame);
diff --git a/web/src/components/timeline/TimelineRegion.tsx b/web/src/components/timeline/TimelineRegion.tsx
index 51595833..e4ad9e38 100644
--- a/web/src/components/timeline/TimelineRegion.tsx
+++ b/web/src/components/timeline/TimelineRegion.tsx
@@ -23,11 +23,17 @@ export function TimelineRegion() {
   const t = useT();
   const [dragOver, setDragOver] = useState(false);
   const setPreviewMedia = useEditorUiStore((s) => s.setPreviewMedia);
+  const activeNestedSequenceId = useEditorUiStore((s) => s.activeNestedSequenceId);
+  const exitNestedSequence = useEditorUiStore((s) => s.exitNestedSequence);
+  const rootTimeline = useProjectStore((s) => s.timeline);
+  const activeSequence = rootTimeline.nestedSequences?.find(
+    (sequence) => sequence.id === activeNestedSequenceId,
+  );
   // The full-region "drop to add" overlay is only an affordance for an EMPTY
   // timeline. Once tracks exist, TimelineContainer paints a precise drop ghost
   // (exact track + frame span), so the whole-region highlight is suppressed to
   // avoid masking it.
-  const hasTracks = useProjectStore((s) => s.timeline.tracks.length > 0);
+  const hasTracks = (activeSequence?.timeline ?? rootTimeline).tracks.length > 0;
 
   const hasMediaPayload = (e: React.DragEvent) =>
     e.dataTransfer.types.includes(MEDIA_DND_TYPE);
@@ -57,6 +63,29 @@ export function TimelineRegion() {
   return (
     <PanelShell panel="timeline">
       <Toolbar />
+      {activeSequence && (
+        <div
+          role="navigation"
+          aria-label={t("timeline.compoundBreadcrumb")}
+          style={{
+            height: 30,
+            display: "flex",
+            alignItems: "center",
+            gap: 8,
+            padding: "0 10px",
+            borderBottom: "var(--bw-thin) solid var(--border-subtle)",
+            background: "var(--bg-secondary)",
+            color: "var(--text-secondary)",
+            fontSize: "var(--fs-sm)",
+          }}
+        >
+          <button type="button" className="toolbar-button" onClick={exitNestedSequence}>
+            ← {t("timeline.main")}
+          </button>
+          <span aria-hidden="true">/</span>
+          <strong style={{ color: "var(--text-primary)" }}>{activeSequence.name}</strong>
+        </div>
+      )}
       <div
         style={{ position: "relative", flex: 1, minHeight: 0 }}
         // Focusing the editing area returns the preview to the Timeline tab
diff --git a/web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx b/web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx
new file mode 100644
index 00000000..0e71416b
--- /dev/null
+++ b/web/src/components/timeline/TrackHeaderColumn.interaction.test.tsx
@@ -0,0 +1,218 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import type { Timeline } from "../../lib/types";
+import { useEditorUiStore } from "../../store/uiStore";
+
+const editSpies = vi.hoisted(() => ({
+  setTrackProps: vi.fn(),
+  swapTracks: vi.fn(),
+}));
+
+vi.mock("../../store/editActions", () => editSpies);
+
+import { TrackHeaderColumn } from "./TrackHeaderColumn";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+const timeline: Timeline = {
+  fps: 30,
+  width: 1920,
+  height: 1080,
+  settingsConfigured: true,
+  tracks: [
+    { id: "audio-1", type: "audio", muted: false, hidden: false, syncLocked: true, clips: [] },
+    { id: "video-1", type: "video", muted: false, hidden: false, syncLocked: false, clips: [] },
+  ],
+};
+
+let container: HTMLDivElement;
+let root: Root;
+let setPointerCapture: ReturnType<typeof vi.spyOn>;
+let releasePointerCapture: ReturnType<typeof vi.spyOn>;
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  setPointerCapture = vi.spyOn(HTMLElement.prototype, "setPointerCapture")
+    .mockImplementation(() => {});
+  releasePointerCapture = vi.spyOn(HTMLElement.prototype, "releasePointerCapture")
+    .mockImplementation(() => {});
+  editSpies.setTrackProps.mockResolvedValue(undefined);
+  editSpies.swapTracks.mockResolvedValue(undefined);
+  useEditorUiStore.setState({ trackDisplayHeights: {}, toast: null });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  act(() => {
+    root.render(<TrackHeaderColumn timeline={timeline} scrollTop={0} totalHeight={300} />);
+  });
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  vi.restoreAllMocks();
+});
+
+async function exerciseTrackAction(
+  action: "mute" | "hide" | "sync-lock",
+  trackIndex: number,
+  expected: Record<string, boolean>,
+): Promise<void> {
+  const button = container.querySelector<HTMLButtonElement>(
+    `[data-track-action='${action}'][data-track-index='${trackIndex}']`,
+  );
+  expect(button?.type).toBe("button");
+  expect(button?.getAttribute("aria-pressed")).not.toBeNull();
+  button?.focus();
+  await act(async () => button?.click());
+  expect(document.activeElement).toBe(button);
+  expect(editSpies.setTrackProps).toHaveBeenCalledTimes(1);
+  expect(editSpies.setTrackProps).toHaveBeenCalledWith(trackIndex, expected);
+  expect(editSpies.swapTracks).not.toHaveBeenCalled();
+
+  vi.clearAllMocks();
+  editSpies.setTrackProps.mockRejectedValueOnce(new Error("locked"));
+  await act(async () => {
+    button?.click();
+    await Promise.resolve();
+  });
+  expect(editSpies.setTrackProps).toHaveBeenCalledTimes(1);
+  expect(useEditorUiStore.getState().toast?.message).toContain("locked");
+}
+
+it("control-4c72d4f81e47c57d mute audio track", async () => {
+  await exerciseTrackAction("mute", 0, { muted: true });
+});
+
+it("control-74289f5806f8162a hide visual track", async () => {
+  await exerciseTrackAction("hide", 1, { hidden: true });
+});
+
+it("control-71e7fa7fcd6aa730 toggle track sync lock", async () => {
+  await exerciseTrackAction("sync-lock", 1, { syncLocked: true });
+});
+
+it("control-9f9173ff2ee37464 resize track display height", async () => {
+  const grip = container.querySelector<HTMLElement>("[data-track-resize='audio-1']")!;
+  expect(grip.getAttribute("role")).toBe("separator");
+  expect(grip.getAttribute("aria-orientation")).toBe("horizontal");
+  expect(grip.getAttribute("aria-valuemin")).toBe("32");
+  expect(grip.getAttribute("aria-valuemax")).toBe("200");
+  expect(grip.getAttribute("aria-valuenow")).toBe("50");
+  expect(grip.getAttribute("aria-label")).toContain("A1");
+  expect(grip.tabIndex).toBe(0);
+
+  await act(async () => {
+    grip.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 9,
+      clientY: 100,
+    }));
+    grip.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 9,
+      clientY: 400,
+    }));
+  });
+  expect(setPointerCapture).toHaveBeenCalledWith(9);
+  expect(grip.dataset.interactionState).toBe("dragging");
+  expect(useEditorUiStore.getState().trackDisplayHeights["audio-1"]).toBe(200);
+  expect(grip.getAttribute("aria-valuenow")).toBe("200");
+
+  await act(async () => {
+    grip.dispatchEvent(new PointerEvent("pointerup", { bubbles: true, pointerId: 9 }));
+  });
+  expect(releasePointerCapture).toHaveBeenCalledWith(9);
+  expect(grip.dataset.interactionState).toBe("enabled");
+
+  await act(async () => {
+    grip.dispatchEvent(new PointerEvent("pointerdown", {
+      bubbles: true,
+      pointerId: 10,
+      clientY: 200,
+    }));
+    grip.dispatchEvent(new PointerEvent("pointermove", {
+      bubbles: true,
+      pointerId: 10,
+      clientY: -200,
+    }));
+    grip.dispatchEvent(new PointerEvent("pointercancel", { bubbles: true, pointerId: 10 }));
+  });
+  expect(useEditorUiStore.getState().trackDisplayHeights["audio-1"]).toBe(32);
+  expect(releasePointerCapture).toHaveBeenCalledWith(10);
+  expect(grip.dataset.interactionState).toBe("enabled");
+
+  grip.focus();
+  await act(async () => {
+    grip.dispatchEvent(new KeyboardEvent("keydown", { key: "End", bubbles: true }));
+  });
+  expect(useEditorUiStore.getState().trackDisplayHeights["audio-1"]).toBe(200);
+  await act(async () => {
+    grip.dispatchEvent(new KeyboardEvent("keydown", { key: "Home", bubbles: true }));
+  });
+  await act(async () => {
+    grip.dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowDown", bubbles: true }));
+  });
+  expect(useEditorUiStore.getState().trackDisplayHeights["audio-1"]).toBe(42);
+  expect(document.activeElement).toBe(grip);
+  expect(editSpies.setTrackProps).not.toHaveBeenCalled();
+  expect(editSpies.swapTracks).not.toHaveBeenCalled();
+});
+
+it("control-db7fbb7edbcca44d dismiss track reorder menu", async () => {
+  const row = container.querySelector<HTMLElement>("[data-track-row='audio-1']")!;
+  row.focus();
+  await act(async () => {
+    row.dispatchEvent(new MouseEvent("contextmenu", {
+      bubbles: true,
+      cancelable: true,
+      clientX: 80,
+      clientY: 90,
+    }));
+  });
+  expect(document.body.querySelector("[role='menu']")).not.toBeNull();
+  expect(document.activeElement?.getAttribute("role")).toBe("menu");
+
+  const backdrop = document.body.querySelector<HTMLElement>("[data-track-menu-backdrop]")!;
+  await act(async () => {
+    backdrop.dispatchEvent(new MouseEvent("mousedown", { bubbles: true }));
+  });
+  expect(document.body.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(row);
+
+  await act(async () => {
+    row.dispatchEvent(new MouseEvent("contextmenu", {
+      bubbles: true,
+      cancelable: true,
+      clientX: 80,
+      clientY: 90,
+    }));
+  });
+  const contextBackdrop = document.body.querySelector<HTMLElement>("[data-track-menu-backdrop]")!;
+  const contextEvent = new MouseEvent("contextmenu", { bubbles: true, cancelable: true });
+  await act(async () => contextBackdrop.dispatchEvent(contextEvent));
+  expect(contextEvent.defaultPrevented).toBe(true);
+  expect(document.body.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(row);
+
+  await act(async () => {
+    row.dispatchEvent(new KeyboardEvent("keydown", {
+      key: "F10",
+      shiftKey: true,
+      bubbles: true,
+    }));
+  });
+  const keyboardMenu = document.body.querySelector<HTMLElement>("[role='menu']")!;
+  expect(keyboardMenu).not.toBeNull();
+  await act(async () => {
+    keyboardMenu.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }));
+  });
+  expect(document.body.querySelector("[role='menu']")).toBeNull();
+  expect(document.activeElement).toBe(row);
+  expect(editSpies.setTrackProps).not.toHaveBeenCalled();
+  expect(editSpies.swapTracks).not.toHaveBeenCalled();
+});
diff --git a/web/src/components/timeline/TrackHeaderColumn.tsx b/web/src/components/timeline/TrackHeaderColumn.tsx
index 334c54dd..eaaa61b0 100644
--- a/web/src/components/timeline/TrackHeaderColumn.tsx
+++ b/web/src/components/timeline/TrackHeaderColumn.tsx
@@ -5,7 +5,7 @@
  * UI-only displayHeight (not persisted).
  */
 
-import { useCallback, useRef, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { createPortal } from "react-dom";
 import { Eye, EyeOff, Volume2, VolumeX, Link, Unlink } from "lucide-react";
 import { Icon } from "../ui/Icon";
@@ -73,6 +73,7 @@ export function TrackHeaderColumn({ timeline, scrollTop, totalHeight }: Props) {
           return (
             <TrackHeaderRow
               key={track.id || i}
+              trackId={track.id}
               index={i}
               label={trackDisplayLabel(timeline, i)}
               color={trackColor(track.type)}
@@ -111,6 +112,7 @@ function trackTop(
 }
 
 interface RowProps {
+  trackId: string;
   index: number;
   label: string;
   color: string;
@@ -128,41 +130,110 @@ interface RowProps {
 
 function TrackHeaderRow(p: RowProps) {
   const t = useT();
-  const dragRef = useRef<{ startY: number } | null>(null);
+  const pushToast = useEditorUiStore((s) => s.pushToast);
+  const rowRef = useRef<HTMLDivElement>(null);
+  const dragRef = useRef<{
+    startY: number;
+    pointerId: number;
+    target: HTMLElement;
+  } | null>(null);
+  const [isResizing, setIsResizing] = useState(false);
   const [menu, setMenu] = useState<{ x: number; y: number } | null>(null);
 
+  const closeMenu = useCallback(() => {
+    setMenu(null);
+    rowRef.current?.focus();
+  }, []);
+
+  const finishResize = useCallback((releaseCapture: boolean) => {
+    const drag = dragRef.current;
+    if (!drag) return;
+    dragRef.current = null;
+    setIsResizing(false);
+    if (releaseCapture) {
+      try {
+        drag.target.releasePointerCapture(drag.pointerId);
+      } catch {
+        // Capture can already be gone when the browser ends the gesture.
+      }
+    }
+  }, []);
+
   const onPointerDown = useCallback(
     (e: React.PointerEvent) => {
       e.preventDefault();
       e.stopPropagation();
-      dragRef.current = { startY: e.clientY };
-      (e.target as HTMLElement).setPointerCapture(e.pointerId);
+      const target = e.currentTarget as HTMLElement;
+      dragRef.current = { startY: e.clientY, pointerId: e.pointerId, target };
+      setIsResizing(true);
+      target.focus();
+      target.setPointerCapture(e.pointerId);
     },
     [],
   );
   const onPointerMove = useCallback(
     (e: React.PointerEvent) => {
-      if (!dragRef.current) return;
-      const delta = e.clientY - dragRef.current.startY;
-      dragRef.current.startY = e.clientY;
+      const drag = dragRef.current;
+      if (!drag || drag.pointerId !== e.pointerId) return;
+      const delta = e.clientY - drag.startY;
+      drag.startY = e.clientY;
       p.onResize(delta);
     },
     [p],
   );
-  const onPointerUp = useCallback((e: React.PointerEvent) => {
-    dragRef.current = null;
-    (e.target as HTMLElement).releasePointerCapture(e.pointerId);
-  }, []);
+  const onPointerUp = useCallback(
+    (e: React.PointerEvent) => {
+      if (dragRef.current?.pointerId !== e.pointerId) return;
+      finishResize(true);
+    },
+    [finishResize],
+  );
+  const onKeyDown = useCallback(
+    (e: React.KeyboardEvent) => {
+      let delta: number | null = null;
+      if (e.key === "ArrowUp") delta = -10;
+      else if (e.key === "ArrowDown") delta = 10;
+      else if (e.key === "Home") delta = TRACK_SIZE.minHeight - p.height;
+      else if (e.key === "End") delta = TRACK_SIZE.maxHeight - p.height;
+      else if (e.key === "Escape" && dragRef.current) {
+        e.preventDefault();
+        finishResize(true);
+        return;
+      }
+      if (delta === null) return;
+      e.preventDefault();
+      p.onResize(delta);
+    },
+    [finishResize, p],
+  );
 
   const iconColor = (active: boolean) =>
     active ? "var(--text-secondary)" : "rgba(255,255,255,0.186)"; // 0.62*0.3
 
+  const updateTrack = (properties: { muted?: boolean; hidden?: boolean; syncLocked?: boolean }) => {
+    void setTrackProps(p.index, properties).catch((error: unknown) => {
+      const message = error instanceof Error ? error.message : String(error);
+      pushToast(t("timeline.trackUpdateFailed", { error: message }));
+    });
+  };
+
   return (
     <div
+      ref={rowRef}
+      data-track-row={p.trackId}
+      tabIndex={0}
+      aria-label={p.label}
       onContextMenu={(e) => {
         e.preventDefault();
         setMenu({ x: e.clientX, y: e.clientY });
       }}
+      onKeyDown={(e) => {
+        if (e.currentTarget !== e.target) return;
+        if (e.key !== "ContextMenu" && !(e.shiftKey && e.key === "F10")) return;
+        e.preventDefault();
+        const rect = e.currentTarget.getBoundingClientRect();
+        setMenu({ x: rect.left + 8, y: rect.top + 8 });
+      }}
       style={{
         position: "absolute",
         top: p.top,
@@ -194,35 +265,47 @@ function TrackHeaderRow(p: RowProps) {
       {/* Toggles. Clicking dispatches SetTrackProps (toggles the field). */}
       <div style={{ display: "flex", alignItems: "center", gap: 2, paddingRight: 4 }}>
         {p.isAudio ? (
-          <span
+          <button
+            type="button"
+            data-track-action="mute"
+            data-track-index={p.index}
+            aria-label={t("timeline.mute")}
+            aria-pressed={p.muted}
             title={t("timeline.mute")}
-            role="button"
             onPointerDown={(e) => e.stopPropagation()}
-            onClick={() => void setTrackProps(p.index, { muted: !p.muted })}
+            onClick={() => updateTrack({ muted: !p.muted })}
             style={{ color: iconColor(!p.muted), display: "inline-flex", cursor: "pointer" }}
           >
             <Icon icon={p.muted ? VolumeX : Volume2} size={11} />
-          </span>
+          </button>
         ) : (
-          <span
+          <button
+            type="button"
+            data-track-action="hide"
+            data-track-index={p.index}
+            aria-label={t("timeline.hide")}
+            aria-pressed={p.hidden}
             title={t("timeline.hide")}
-            role="button"
             onPointerDown={(e) => e.stopPropagation()}
-            onClick={() => void setTrackProps(p.index, { hidden: !p.hidden })}
+            onClick={() => updateTrack({ hidden: !p.hidden })}
             style={{ color: iconColor(!p.hidden), display: "inline-flex", cursor: "pointer" }}
           >
             <Icon icon={p.hidden ? EyeOff : Eye} size={11} />
-          </span>
+          </button>
         )}
-        <span
+        <button
+          type="button"
+          data-track-action="sync-lock"
+          data-track-index={p.index}
+          aria-label={t("timeline.syncLock")}
+          aria-pressed={p.syncLocked}
           title={t("timeline.syncLock")}
-          role="button"
           onPointerDown={(e) => e.stopPropagation()}
-          onClick={() => void setTrackProps(p.index, { syncLocked: !p.syncLocked })}
+          onClick={() => updateTrack({ syncLocked: !p.syncLocked })}
           style={{ color: iconColor(p.syncLocked), display: "inline-flex", cursor: "pointer" }}
         >
           <Icon icon={p.syncLocked ? Link : Unlink} size={11} />
-        </span>
+        </button>
       </div>
       {menu &&
         createPortal(
@@ -233,7 +316,8 @@ function TrackHeaderRow(p: RowProps) {
             canSwapDown={p.canSwapDown}
             onSwapUp={() => void swapTracks(p.index, p.index - 1)}
             onSwapDown={() => void swapTracks(p.index, p.index + 1)}
-            onClose={() => setMenu(null)}
+            onClose={closeMenu}
+            menuLabel={p.label}
             labels={{
               moveUp: t("timeline.moveTrackUp"),
               moveDown: t("timeline.moveTrackDown"),
@@ -243,9 +327,21 @@ function TrackHeaderRow(p: RowProps) {
         )}
       {/* Bottom resize grip. */}
       <div
+        data-track-resize={p.trackId}
+        data-interaction-state={isResizing ? "dragging" : "enabled"}
+        role="separator"
+        aria-label={p.label}
+        aria-orientation="horizontal"
+        aria-valuemin={TRACK_SIZE.minHeight}
+        aria-valuemax={TRACK_SIZE.maxHeight}
+        aria-valuenow={p.height}
+        tabIndex={0}
         onPointerDown={onPointerDown}
         onPointerMove={onPointerMove}
         onPointerUp={onPointerUp}
+        onPointerCancel={() => finishResize(true)}
+        onLostPointerCapture={() => finishResize(false)}
+        onKeyDown={onKeyDown}
         style={{
           position: "absolute",
           left: 0,
@@ -267,6 +363,7 @@ function TrackHeaderContextMenu({
   onSwapUp,
   onSwapDown,
   onClose,
+  menuLabel,
   labels,
 }: {
   x: number;
@@ -276,22 +373,49 @@ function TrackHeaderContextMenu({
   onSwapUp: () => void;
   onSwapDown: () => void;
   onClose: () => void;
+  menuLabel: string;
   labels: { moveUp: string; moveDown: string };
 }) {
+  const menuRef = useRef<HTMLDivElement>(null);
   const items = [
     { label: labels.moveUp, enabled: canSwapUp, action: onSwapUp },
     { label: labels.moveDown, enabled: canSwapDown, action: onSwapDown },
   ];
+
+  useEffect(() => {
+    const firstEnabled = menuRef.current?.querySelector<HTMLButtonElement>(
+      "button:not(:disabled)",
+    );
+    (firstEnabled ?? menuRef.current)?.focus();
+  }, []);
+
+  const moveFocus = (direction: 1 | -1) => {
+    const enabled = Array.from(
+      menuRef.current?.querySelectorAll<HTMLButtonElement>("button:not(:disabled)") ?? [],
+    );
+    if (enabled.length === 0) return;
+    const current = enabled.indexOf(document.activeElement as HTMLButtonElement);
+    const next = current < 0
+      ? direction === 1 ? 0 : enabled.length - 1
+      : (current + direction + enabled.length) % enabled.length;
+    enabled[next].focus();
+  };
+
   return (
     <div
+      data-track-menu-backdrop
       onMouseDown={onClose}
       onContextMenu={(e) => {
         e.preventDefault();
+        e.stopPropagation();
         onClose();
       }}
       style={{ position: "fixed", inset: 0, zIndex: 1000 }}
     >
       <div
+        ref={menuRef}
+        aria-label={menuLabel}
+        tabIndex={-1}
         style={{
           position: "fixed",
           left: x,
@@ -306,6 +430,27 @@ function TrackHeaderContextMenu({
         }}
         role="menu"
         onMouseDown={(e) => e.stopPropagation()}
+        onKeyDown={(e) => {
+          if (e.key === "Escape") {
+            e.preventDefault();
+            onClose();
+          } else if (e.key === "ArrowDown") {
+            e.preventDefault();
+            moveFocus(1);
+          } else if (e.key === "ArrowUp") {
+            e.preventDefault();
+            moveFocus(-1);
+          } else if (e.key === "Home") {
+            e.preventDefault();
+            menuRef.current?.querySelector<HTMLButtonElement>("button:not(:disabled)")?.focus();
+          } else if (e.key === "End") {
+            e.preventDefault();
+            const enabled = menuRef.current?.querySelectorAll<HTMLButtonElement>(
+              "button:not(:disabled)",
+            );
+            enabled?.[enabled.length - 1]?.focus();
+          }
+        }}
       >
         {items.map((item) => (
           <button
diff --git a/web/src/components/timeline/timelineCanvas.ts b/web/src/components/timeline/timelineCanvas.ts
index 026ba92d..139af781 100644
--- a/web/src/components/timeline/timelineCanvas.ts
+++ b/web/src/components/timeline/timelineCanvas.ts
@@ -257,6 +257,32 @@ export function paintTimeline(ctx: CanvasRenderingContext2D, s: PaintState) {
         isDuplicate,
         visibleX: { min: scrollLeft, max: visRight },
       });
+      const transition = clip.transitionOut;
+      const incoming = transition
+        ? track.clips.find((candidate) => candidate.id === transition.toClipId)
+        : undefined;
+      if (
+        transition?.kind === "crossDissolve" &&
+        (!transition.fromClipId || transition.fromClipId === clip.id) &&
+        incoming &&
+        clip.startFrame + clip.durationFrames === incoming.startFrame
+      ) {
+        // Compact bow-tie marker centered on the cut. It is purely visual; the
+        // Transition tab owns editing and the renderer owns frame blending.
+        const cutX = rect.x + rect.width;
+        const centerY = rect.y + rect.height / 2;
+        const half = Math.min(7, Math.max(4, rect.height / 4));
+        ctx.beginPath();
+        ctx.moveTo(cutX - half, centerY - half);
+        ctx.lineTo(cutX, centerY);
+        ctx.lineTo(cutX - half, centerY + half);
+        ctx.lineTo(cutX + half, centerY + half);
+        ctx.lineTo(cutX, centerY);
+        ctx.lineTo(cutX + half, centerY - half);
+        ctx.closePath();
+        ctx.fillStyle = RANGE.edge;
+        ctx.fill();
+      }
     }
   }
 
diff --git a/web/src/components/timeline/timelineOverlays.test.ts b/web/src/components/timeline/timelineOverlays.test.ts
index b9d7970e..956450e6 100644
--- a/web/src/components/timeline/timelineOverlays.test.ts
+++ b/web/src/components/timeline/timelineOverlays.test.ts
@@ -144,6 +144,19 @@ describe("gap overlay (content canvas)", () => {
   });
 });
 
+describe("transition marker (content canvas)", () => {
+  it("paints a cut marker for a valid adjacent cross dissolve", () => {
+    const a = clip("a", 0, 100);
+    const b = clip("b", 100, 100);
+    a.transitionOut = { toClipId: "b", kind: "crossDissolve", durationFrames: 15 };
+    const withTransition = timeline();
+    withTransition.tracks[0].clips = [a, b];
+    const { ctx, calls } = recordingCtx();
+    paintTimeline(ctx, baseState({ timeline: withTransition }));
+    expect(calls.some((call) => call.op === "fill" && call.style === RANGE.edge)).toBe(true);
+  });
+});
+
 describe("ripple-insert indicator (content canvas)", () => {
   it("draws a yellow insertion line when the media ghost is a ripple insert", () => {
     const ghost: MediaGhostPaint = { startFrame: 120, durationFrames: 60, trackIndex: 0, newTrackIndex: null, rippleInsert: true };
diff --git a/web/src/components/toolbar/Toolbar.interaction.test.tsx b/web/src/components/toolbar/Toolbar.interaction.test.tsx
new file mode 100644
index 00000000..5956e2b3
--- /dev/null
+++ b/web/src/components/toolbar/Toolbar.interaction.test.tsx
@@ -0,0 +1,418 @@
+// @vitest-environment happy-dom
+
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const edit = vi.hoisted(() => ({
+  undo: vi.fn<() => Promise<void>>(),
+  redo: vi.fn<() => Promise<void>>(),
+  splitAtPlayhead: vi.fn<() => Promise<void>>(),
+  trimStartToPlayhead: vi.fn<() => Promise<void>>(),
+  trimEndToPlayhead: vi.fn<() => Promise<void>>(),
+  addTextClip: vi.fn<() => Promise<void>>(),
+}));
+
+vi.mock("../../i18n", () => ({
+  useT: () => (key: string) => key,
+}));
+
+vi.mock("../../store/editActions", () => edit);
+
+import { useEditorUiStore } from "../../store/uiStore";
+import { useProjectStore } from "../../store/projectStore";
+import { ZOOM } from "../../lib/theme";
+import { Toolbar } from "./Toolbar";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+function deferred() {
+  let resolve!: () => void;
+  const promise = new Promise<void>((done) => {
+    resolve = done;
+  });
+  return { promise, resolve };
+}
+
+function undoButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.undo"]',
+  );
+  if (!button) throw new Error("undo control was not rendered");
+  return button;
+}
+
+function redoButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.redo"]',
+  );
+  if (!button) throw new Error("redo control was not rendered");
+  return button;
+}
+
+function splitButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.split"]',
+  );
+  if (!button) throw new Error("split control was not rendered");
+  return button;
+}
+
+function trimStartButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.trimStart"]',
+  );
+  if (!button) throw new Error("trim-start control was not rendered");
+  return button;
+}
+
+function trimEndButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.trimEnd"]',
+  );
+  if (!button) throw new Error("trim-end control was not rendered");
+  return button;
+}
+
+function addTextButton(): HTMLButtonElement {
+  const button = container?.querySelector<HTMLButtonElement>(
+    'button[aria-label="toolbar.addText"]',
+  );
+  if (!button) throw new Error("add-text control was not rendered");
+  return button;
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  localStorage.clear();
+  useEditorUiStore.setState({
+    toast: null,
+    toolMode: "pointer",
+    minZoomScale: 0.05,
+    zoomScale: ZOOM.default,
+  });
+  useProjectStore.setState({ canUndo: false, canRedo: false });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+});
+
+describe("Toolbar command controls", () => {
+  it("control-3be71cae61006e08 undo the last edit", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(undoButton().title).toBe("toolbar.undo");
+    expect(undoButton().disabled).toBe(true);
+    undoButton().click();
+    undoButton().dispatchEvent(new KeyboardEvent("keydown", { key: "Enter", bubbles: true }));
+    expect(edit.undo).not.toHaveBeenCalled();
+
+    await act(async () => useProjectStore.setState({ canUndo: true, canRedo: false }));
+    undoButton().focus();
+    const first = deferred();
+    edit.undo.mockImplementationOnce(async () => {
+      await first.promise;
+      useProjectStore.setState({ canUndo: false, canRedo: true });
+    });
+
+    await act(async () => undoButton().click());
+    expect(edit.undo).toHaveBeenCalledTimes(1);
+    expect(undoButton().disabled).toBe(true);
+    expect(undoButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    undoButton().click();
+    expect(edit.undo).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(undoButton());
+
+    await act(async () => first.resolve());
+    expect(useProjectStore.getState()).toMatchObject({ canUndo: false, canRedo: true });
+    expect(undoButton().disabled).toBe(true);
+    expect(undoButton().parentElement?.hasAttribute("aria-busy")).toBe(false);
+
+    await act(async () => useProjectStore.setState({ canUndo: true }));
+    edit.undo.mockRejectedValueOnce(new Error("history locked"));
+    await act(async () => undoButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("history locked");
+    expect(undoButton().disabled).toBe(false);
+
+    edit.undo.mockResolvedValueOnce();
+    await act(async () => undoButton().click());
+    expect(edit.undo).toHaveBeenCalledTimes(3);
+
+    const webRoot = process.cwd();
+    const toolbarSource = readFileSync(join(webRoot, "src/components/toolbar/Toolbar.tsx"), "utf8");
+    const actionSource = readFileSync(join(webRoot, "src/store/editActions.ts"), "utf8");
+    const apiSource = readFileSync(join(webRoot, "src/lib/api.ts"), "utf8");
+    const rustSource = readFileSync(join(webRoot, "../src-tauri/src/commands.rs"), "utf8");
+    expect(toolbarSource).toMatch(/await edit\.undo\(\)/);
+    expect(actionSource).toMatch(/export async function undo\(\)[\s\S]*?await api\.undo\(\)/);
+    expect(apiSource).toMatch(/export async function undo\(\)[\s\S]*?invokeImpl<EditResult>\("undo"\)/);
+    expect(rustSource).toMatch(/pub fn undo[\s\S]*?handle_undo\(&core\)/);
+  });
+
+  it("control-b001ac6b21c97ad0 redo the last undone edit", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(redoButton().title).toBe("toolbar.redo");
+    expect(redoButton().disabled).toBe(true);
+    redoButton().click();
+    redoButton().dispatchEvent(new KeyboardEvent("keydown", { key: "Enter", bubbles: true }));
+    expect(edit.redo).not.toHaveBeenCalled();
+
+    await act(async () => useProjectStore.setState({ canUndo: false, canRedo: true }));
+    redoButton().focus();
+    const first = deferred();
+    edit.redo.mockImplementationOnce(async () => {
+      await first.promise;
+      useProjectStore.setState({ canUndo: true, canRedo: false });
+    });
+
+    await act(async () => redoButton().click());
+    expect(edit.redo).toHaveBeenCalledTimes(1);
+    expect(redoButton().disabled).toBe(true);
+    expect(redoButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    redoButton().click();
+    expect(edit.redo).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(redoButton());
+
+    await act(async () => first.resolve());
+    expect(useProjectStore.getState()).toMatchObject({ canUndo: true, canRedo: false });
+    expect(redoButton().disabled).toBe(true);
+    expect(redoButton().parentElement?.hasAttribute("aria-busy")).toBe(false);
+
+    await act(async () => useProjectStore.setState({ canRedo: true }));
+    edit.redo.mockRejectedValueOnce(new Error("redo history locked"));
+    await act(async () => redoButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("redo history locked");
+    expect(redoButton().disabled).toBe(false);
+
+    edit.redo.mockResolvedValueOnce();
+    await act(async () => redoButton().click());
+    expect(edit.redo).toHaveBeenCalledTimes(3);
+
+    const webRoot = process.cwd();
+    const toolbarSource = readFileSync(join(webRoot, "src/components/toolbar/Toolbar.tsx"), "utf8");
+    const actionSource = readFileSync(join(webRoot, "src/store/editActions.ts"), "utf8");
+    const apiSource = readFileSync(join(webRoot, "src/lib/api.ts"), "utf8");
+    const rustSource = readFileSync(join(webRoot, "../src-tauri/src/commands.rs"), "utf8");
+    expect(toolbarSource).toMatch(/await edit\.redo\(\)/);
+    expect(actionSource).toMatch(/export async function redo\(\)[\s\S]*?await api\.redo\(\)/);
+    expect(apiSource).toMatch(/export async function redo\(\)[\s\S]*?invokeImpl<EditResult>\("redo"\)/);
+    expect(rustSource).toMatch(/pub fn redo[\s\S]*?handle_redo\(&core\)/);
+  });
+
+  it("control-9d69468ce3479312 switch to Pointer tool", async () => {
+    useEditorUiStore.setState({ toolMode: "razor" });
+    await act(async () => root?.render(<Toolbar />));
+
+    const pointer = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="toolbar.pointer"]',
+    );
+    expect(pointer).not.toBeNull();
+    expect(pointer?.disabled).toBe(false);
+    expect(pointer?.classList.contains("is-active")).toBe(false);
+
+    pointer?.focus();
+    await act(async () => pointer?.click());
+    expect(useEditorUiStore.getState().toolMode).toBe("pointer");
+    expect(pointer?.classList.contains("is-active")).toBe(true);
+    expect(document.activeElement).toBe(pointer);
+  });
+
+  it("control-8105812f9d07bc93 switch to Razor tool", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    const razor = container?.querySelector<HTMLButtonElement>(
+      'button[aria-label="toolbar.razor"]',
+    );
+    expect(razor).not.toBeNull();
+    expect(razor?.disabled).toBe(false);
+    expect(razor?.classList.contains("is-active")).toBe(false);
+
+    razor?.focus();
+    await act(async () => razor?.click());
+    expect(useEditorUiStore.getState().toolMode).toBe("razor");
+    expect(razor?.classList.contains("is-active")).toBe(true);
+    expect(document.activeElement).toBe(razor);
+  });
+
+  it("control-582e8fdf1d3d9e7e change timeline zoom", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    const slider = container?.querySelector<HTMLInputElement>(
+      'input[type="range"][aria-label="toolbar.zoom"]',
+    );
+    if (!slider) throw new Error("timeline zoom control was not rendered");
+    expect(slider.disabled).toBe(false);
+
+    slider.focus();
+    await act(async () => {
+      const valueSetter = Object.getOwnPropertyDescriptor(
+        HTMLInputElement.prototype,
+        "value",
+      )?.set;
+      if (!valueSetter) throw new Error("native range value setter is unavailable");
+      valueSetter.call(slider, "0.75");
+      slider.dispatchEvent(new Event("input", { bubbles: true }));
+    });
+
+    const expected = Math.exp(
+      Math.log(0.05) + 0.75 * (Math.log(ZOOM.max) - Math.log(0.05)),
+    );
+    expect(useEditorUiStore.getState().zoomScale).toBeCloseTo(expected, 10);
+    expect(Number(localStorage.getItem("opentake.ui.v1.zoomScale"))).toBeCloseTo(expected, 10);
+    expect(document.activeElement).toBe(slider);
+  });
+
+  it("control-c96abe84259649a3 split selected clips at playhead", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(splitButton().title).toBe("toolbar.split");
+    expect(splitButton().disabled).toBe(false);
+    splitButton().focus();
+    const first = deferred();
+    edit.splitAtPlayhead.mockReturnValueOnce(first.promise);
+
+    await act(async () => splitButton().click());
+    expect(edit.splitAtPlayhead).toHaveBeenCalledTimes(1);
+    expect(splitButton().disabled).toBe(true);
+    expect(splitButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    splitButton().click();
+    expect(edit.splitAtPlayhead).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(splitButton());
+
+    await act(async () => first.resolve());
+    expect(splitButton().disabled).toBe(false);
+    expect(splitButton().parentElement?.hasAttribute("aria-busy")).toBe(false);
+
+    edit.splitAtPlayhead.mockRejectedValueOnce(new Error("split rejected"));
+    await act(async () => splitButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("split rejected");
+    expect(splitButton().disabled).toBe(false);
+
+    edit.splitAtPlayhead.mockResolvedValueOnce();
+    await act(async () => splitButton().click());
+    expect(edit.splitAtPlayhead).toHaveBeenCalledTimes(3);
+
+    const webRoot = process.cwd();
+    const actionSource = readFileSync(join(webRoot, "src/store/editActions.ts"), "utf8");
+    const apiSource = readFileSync(join(webRoot, "src/lib/api.ts"), "utf8");
+    const rustSource = readFileSync(join(webRoot, "../src-tauri/src/commands.rs"), "utf8");
+    const opsSource = readFileSync(join(webRoot, "../crates/opentake-ops/src/command.rs"), "utf8");
+    expect(actionSource).toMatch(/export async function splitAtPlayhead\(\)[\s\S]*?splitClip\(id, frame\)/);
+    expect(apiSource).toMatch(/export async function editApply[\s\S]*?invokeImpl<EditResult>\("edit_apply", \{ command \}\)/);
+    expect(rustSource).toMatch(/pub fn edit_apply[\s\S]*?other\.into_command\(\)[\s\S]*?handle_edit_apply/);
+    expect(opsSource).toMatch(/SplitClip \{ clip_id: String, at_frame: i32 \}/);
+  });
+
+  it("control-f38c30bc83d65d2e trim selected clip starts to playhead", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(trimStartButton().title).toBe("toolbar.trimStart");
+    expect(trimStartButton().disabled).toBe(false);
+    trimStartButton().focus();
+    const first = deferred();
+    edit.trimStartToPlayhead.mockReturnValueOnce(first.promise);
+
+    await act(async () => trimStartButton().click());
+    expect(edit.trimStartToPlayhead).toHaveBeenCalledTimes(1);
+    expect(trimStartButton().disabled).toBe(true);
+    expect(trimStartButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    trimStartButton().click();
+    expect(edit.trimStartToPlayhead).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(trimStartButton());
+
+    await act(async () => first.resolve());
+    expect(trimStartButton().disabled).toBe(false);
+
+    edit.trimStartToPlayhead.mockRejectedValueOnce(new Error("trim start rejected"));
+    await act(async () => trimStartButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("trim start rejected");
+    expect(trimStartButton().disabled).toBe(false);
+
+    edit.trimStartToPlayhead.mockResolvedValueOnce();
+    await act(async () => trimStartButton().click());
+    expect(edit.trimStartToPlayhead).toHaveBeenCalledTimes(3);
+
+    const actionSource = readFileSync(join(process.cwd(), "src/store/editActions.ts"), "utf8");
+    expect(actionSource).toMatch(/export async function trimStartToPlayhead\(\)[\s\S]*?trimToPlayheadEdits\(clipsUnderPlayhead\(\), frame, "left"\)/);
+  });
+
+  it("control-eeff92d3d70361d9 trim selected clip ends to playhead", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(trimEndButton().title).toBe("toolbar.trimEnd");
+    expect(trimEndButton().disabled).toBe(false);
+    trimEndButton().focus();
+    const first = deferred();
+    edit.trimEndToPlayhead.mockReturnValueOnce(first.promise);
+
+    await act(async () => trimEndButton().click());
+    expect(edit.trimEndToPlayhead).toHaveBeenCalledTimes(1);
+    expect(trimEndButton().disabled).toBe(true);
+    expect(trimEndButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    trimEndButton().click();
+    expect(edit.trimEndToPlayhead).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(trimEndButton());
+
+    await act(async () => first.resolve());
+    expect(trimEndButton().disabled).toBe(false);
+
+    edit.trimEndToPlayhead.mockRejectedValueOnce(new Error("trim end rejected"));
+    await act(async () => trimEndButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("trim end rejected");
+    expect(trimEndButton().disabled).toBe(false);
+
+    edit.trimEndToPlayhead.mockResolvedValueOnce();
+    await act(async () => trimEndButton().click());
+    expect(edit.trimEndToPlayhead).toHaveBeenCalledTimes(3);
+
+    const actionSource = readFileSync(join(process.cwd(), "src/store/editActions.ts"), "utf8");
+    expect(actionSource).toMatch(/export async function trimEndToPlayhead\(\)[\s\S]*?trimToPlayheadEdits\(clipsUnderPlayhead\(\), frame, "right"\)/);
+  });
+
+  it("control-c6a658045b9e1d6c add a text clip", async () => {
+    await act(async () => root?.render(<Toolbar />));
+
+    expect(addTextButton().title).toBe("toolbar.addText");
+    expect(addTextButton().disabled).toBe(false);
+    addTextButton().focus();
+    const first = deferred();
+    edit.addTextClip.mockReturnValueOnce(first.promise);
+
+    await act(async () => addTextButton().click());
+    expect(edit.addTextClip).toHaveBeenCalledTimes(1);
+    expect(addTextButton().disabled).toBe(true);
+    expect(addTextButton().parentElement?.getAttribute("aria-busy")).toBe("true");
+    addTextButton().click();
+    expect(edit.addTextClip).toHaveBeenCalledTimes(1);
+    expect(document.activeElement).toBe(addTextButton());
+
+    await act(async () => first.resolve());
+    expect(addTextButton().disabled).toBe(false);
+
+    edit.addTextClip.mockRejectedValueOnce(new Error("text insert rejected"));
+    await act(async () => addTextButton().click());
+    expect(useEditorUiStore.getState().toast?.message).toContain("text insert rejected");
+    expect(addTextButton().disabled).toBe(false);
+
+    edit.addTextClip.mockResolvedValueOnce();
+    await act(async () => addTextButton().click());
+    expect(edit.addTextClip).toHaveBeenCalledTimes(3);
+
+    const actionSource = readFileSync(join(process.cwd(), "src/store/editActions.ts"), "utf8");
+    expect(actionSource).toMatch(/export async function addTextClip\(\)[\s\S]*?addTextsAutoTrack\(\[entry\]\)[\s\S]*?selectClips/);
+  });
+});
diff --git a/web/src/components/toolbar/Toolbar.tsx b/web/src/components/toolbar/Toolbar.tsx
index 9c8a58ba..f30354d9 100644
--- a/web/src/components/toolbar/Toolbar.tsx
+++ b/web/src/components/toolbar/Toolbar.tsx
@@ -13,6 +13,7 @@ import {
   ZoomIn,
   ZoomOut,
 } from "lucide-react";
+import { useState } from "react";
 import { HoverButton } from "../ui/HoverButton";
 import { Icon } from "../ui/Icon";
 import { useEditorUiStore } from "../../store/uiStore";
@@ -42,15 +43,17 @@ function GlyphButton({
   serif = false,
   fontSize = 16,
   onClick,
+  disabled = false,
 }: {
   glyph: string;
   title: string;
   serif?: boolean;
   fontSize?: number;
   onClick?: () => void;
+  disabled?: boolean;
 }) {
   return (
-    <HoverButton title={title} onClick={onClick}>
+    <HoverButton title={title} onClick={onClick} disabled={disabled}>
       <span
         style={{
           fontFamily: serif ? "var(--font-serif)" : "var(--font-mono)",
@@ -72,8 +75,12 @@ export function Toolbar() {
   const zoomScale = useEditorUiStore((s) => s.zoomScale);
   const minZoomScale = useEditorUiStore((s) => s.minZoomScale);
   const setZoomScale = useEditorUiStore((s) => s.setZoomScale);
+  const pushToast = useEditorUiStore((s) => s.pushToast);
   const canUndo = useProjectStore((s) => s.canUndo);
   const canRedo = useProjectStore((s) => s.canRedo);
+  const [toolbarPending, setToolbarPending] = useState<
+    "undo" | "redo" | "split" | "trimStart" | "trimEnd" | "addText" | null
+  >(null);
 
   // Logarithmic slider mapping (ToolbarView.swift:50-53): travel uniform per
   // zoom factor; get=log(zoom), set=exp(value).
@@ -86,6 +93,84 @@ export function Toolbar() {
     setZoomScale(Math.exp(logMin + t * (logMax - logMin)));
   };
 
+  const onUndo = async () => {
+    if (!canUndo || toolbarPending) return;
+    setToolbarPending("undo");
+    try {
+      await edit.undo();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.undo")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
+  const onRedo = async () => {
+    if (!canRedo || toolbarPending) return;
+    setToolbarPending("redo");
+    try {
+      await edit.redo();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.redo")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
+  const onSplit = async () => {
+    if (toolbarPending) return;
+    setToolbarPending("split");
+    try {
+      await edit.splitAtPlayhead();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.split")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
+  const onTrimStart = async () => {
+    if (toolbarPending) return;
+    setToolbarPending("trimStart");
+    try {
+      await edit.trimStartToPlayhead();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.trimStart")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
+  const onTrimEnd = async () => {
+    if (toolbarPending) return;
+    setToolbarPending("trimEnd");
+    try {
+      await edit.trimEndToPlayhead();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.trimEnd")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
+  const onAddText = async () => {
+    if (toolbarPending) return;
+    setToolbarPending("addText");
+    try {
+      await edit.addTextClip();
+    } catch (reason: unknown) {
+      const message = reason instanceof Error ? reason.message : String(reason);
+      pushToast(`${t("toolbar.addText")}: ${message}`);
+    } finally {
+      setToolbarPending(null);
+    }
+  };
+
   return (
     <div
       style={{
@@ -101,12 +186,24 @@ export function Toolbar() {
     >
       {/* Undo / Redo */}
       <div style={{ display: "flex", alignItems: "center" }}>
-        <HoverButton title={t("toolbar.undo")} disabled={!canUndo} onClick={() => edit.undo()}>
-          <Icon icon={RotateCcw} size={13} />
-        </HoverButton>
-        <HoverButton title={t("toolbar.redo")} disabled={!canRedo} onClick={() => edit.redo()}>
-          <Icon icon={RotateCw} size={13} />
-        </HoverButton>
+        <span aria-busy={toolbarPending === "undo" || undefined} style={{ display: "inline-flex" }}>
+          <HoverButton
+            title={t("toolbar.undo")}
+            disabled={!canUndo || toolbarPending !== null}
+            onClick={() => void onUndo()}
+          >
+            <Icon icon={RotateCcw} size={13} />
+          </HoverButton>
+        </span>
+        <span aria-busy={toolbarPending === "redo" || undefined} style={{ display: "inline-flex" }}>
+          <HoverButton
+            title={t("toolbar.redo")}
+            disabled={!canRedo || toolbarPending !== null}
+            onClick={() => void onRedo()}
+          >
+            <Icon icon={RotateCw} size={13} />
+          </HoverButton>
+        </span>
       </div>
 
       <Divider />
@@ -133,21 +230,55 @@ export function Toolbar() {
 
       {/* Split / Trim */}
       <div style={{ display: "flex", alignItems: "center" }}>
-        <HoverButton title={t("toolbar.split")} onClick={() => edit.splitAtPlayhead()}>
-          <Icon icon={SplitSquareHorizontal} size={13} />
-        </HoverButton>
-        <GlyphButton
-          glyph="["
-          title={t("toolbar.trimStart")}
-          onClick={() => edit.trimStartToPlayhead()}
-        />
-        <GlyphButton glyph="]" title={t("toolbar.trimEnd")} onClick={() => edit.trimEndToPlayhead()} />
+        <span aria-busy={toolbarPending === "split" || undefined} style={{ display: "inline-flex" }}>
+          <HoverButton
+            title={t("toolbar.split")}
+            disabled={toolbarPending !== null}
+            onClick={() => void onSplit()}
+          >
+            <Icon icon={SplitSquareHorizontal} size={13} />
+          </HoverButton>
+        </span>
+        <span
+          aria-busy={toolbarPending === "trimStart" || undefined}
+          style={{ display: "inline-flex" }}
+        >
+          <GlyphButton
+            glyph="["
+            title={t("toolbar.trimStart")}
+            disabled={toolbarPending !== null}
+            onClick={() => void onTrimStart()}
+          />
+        </span>
+        <span
+          aria-busy={toolbarPending === "trimEnd" || undefined}
+          style={{ display: "inline-flex" }}
+        >
+          <GlyphButton
+            glyph="]"
+            title={t("toolbar.trimEnd")}
+            disabled={toolbarPending !== null}
+            onClick={() => void onTrimEnd()}
+          />
+        </span>
       </div>
 
       <Divider />
 
       {/* Add text */}
-      <GlyphButton glyph="T" title={t("toolbar.addText")} serif fontSize={17} onClick={() => edit.addTextClip()} />
+      <span
+        aria-busy={toolbarPending === "addText" || undefined}
+        style={{ display: "inline-flex" }}
+      >
+        <GlyphButton
+          glyph="T"
+          title={t("toolbar.addText")}
+          serif
+          fontSize={17}
+          disabled={toolbarPending !== null}
+          onClick={() => void onAddText()}
+        />
+      </span>
 
       <div style={{ flex: 1 }} />
 
diff --git a/web/src/components/ui/Dropdown.interaction.test.tsx b/web/src/components/ui/Dropdown.interaction.test.tsx
new file mode 100644
index 00000000..871b9005
--- /dev/null
+++ b/web/src/components/ui/Dropdown.interaction.test.tsx
@@ -0,0 +1,77 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { Dropdown } from "./Dropdown";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let container: HTMLDivElement;
+let outside: HTMLButtonElement;
+let root: Root;
+let onChange: ReturnType<typeof vi.fn>;
+
+beforeEach(() => {
+  container = document.createElement("div");
+  outside = document.createElement("button");
+  document.body.append(container, outside);
+  root = createRoot(container);
+  onChange = vi.fn();
+  act(() => {
+    root.render(
+      <Dropdown
+        value="one"
+        options={[
+          { id: "one", label: "One" },
+          { id: "two", label: "Two" },
+          { id: "disabled", label: "Disabled", disabled: true },
+        ]}
+        onChange={onChange}
+        ariaLabel="Mode"
+      />,
+    );
+  });
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+  outside.remove();
+  vi.restoreAllMocks();
+});
+
+it("control-f1370db38b24cf33 open/close a reusable enum Dropdown", async () => {
+  const trigger = container.querySelector<HTMLButtonElement>("button[aria-haspopup='listbox']")!;
+  expect(trigger.getAttribute("aria-label")).toBe("Mode");
+  expect(trigger.getAttribute("aria-expanded")).toBe("false");
+
+  trigger.focus();
+  await act(async () => trigger.click());
+  expect(trigger.getAttribute("aria-expanded")).toBe("true");
+  expect(trigger.getAttribute("aria-controls")).not.toBeNull();
+  expect(document.activeElement?.getAttribute("role")).toBe("option");
+  expect(document.activeElement?.textContent).toContain("One");
+
+  await act(async () => {
+    outside.dispatchEvent(new MouseEvent("mousedown", { bubbles: true }));
+  });
+  expect(container.querySelector("[role='listbox']")).toBeNull();
+  expect(trigger.getAttribute("aria-expanded")).toBe("false");
+  expect(document.activeElement).toBe(trigger);
+
+  await act(async () => trigger.click());
+  const escape = new KeyboardEvent("keydown", { key: "Escape", bubbles: true, cancelable: true });
+  await act(async () => document.dispatchEvent(escape));
+  expect(escape.defaultPrevented).toBe(true);
+  expect(container.querySelector("[role='listbox']")).toBeNull();
+  expect(document.activeElement).toBe(trigger);
+
+  await act(async () => trigger.click());
+  expect(container.querySelector("[role='listbox']")).not.toBeNull();
+  await act(async () => trigger.click());
+  expect(container.querySelector("[role='listbox']")).toBeNull();
+  expect(document.activeElement).toBe(trigger);
+  expect(onChange).not.toHaveBeenCalled();
+});
diff --git a/web/src/components/ui/Dropdown.tsx b/web/src/components/ui/Dropdown.tsx
index f53d2191..cca89012 100644
--- a/web/src/components/ui/Dropdown.tsx
+++ b/web/src/components/ui/Dropdown.tsx
@@ -9,7 +9,7 @@
  * keep their narrow union (`Locale`, `Theme`, …).
  */
 
-import { useEffect, useRef, useState } from "react";
+import { useCallback, useEffect, useId, useRef, useState } from "react";
 import { Check, ChevronDown } from "lucide-react";
 import { Icon } from "./Icon";
 
@@ -39,15 +39,33 @@ export function Dropdown<T extends string>({
 }: DropdownProps<T>) {
   const [open, setOpen] = useState(false);
   const rootRef = useRef<HTMLDivElement>(null);
+  const triggerRef = useRef<HTMLButtonElement>(null);
+  const listboxRef = useRef<HTMLDivElement>(null);
+  const listboxId = useId();
   const selected = options.find((o) => o.id === value);
 
+  const close = useCallback(() => {
+    setOpen(false);
+    triggerRef.current?.focus();
+  }, []);
+
   useEffect(() => {
     if (!open) return;
+    const selectedOption = listboxRef.current?.querySelector<HTMLButtonElement>(
+      "button[aria-selected='true']:not(:disabled)",
+    );
+    const firstEnabled = listboxRef.current?.querySelector<HTMLButtonElement>(
+      "button:not(:disabled)",
+    );
+    (selectedOption ?? firstEnabled)?.focus();
     const onPointerDown = (e: MouseEvent) => {
-      if (rootRef.current && !rootRef.current.contains(e.target as Node)) setOpen(false);
+      if (rootRef.current && !rootRef.current.contains(e.target as Node)) close();
     };
     const onKey = (e: KeyboardEvent) => {
-      if (e.key === "Escape") setOpen(false);
+      if (e.key === "Escape") {
+        e.preventDefault();
+        close();
+      }
     };
     document.addEventListener("mousedown", onPointerDown);
     document.addEventListener("keydown", onKey);
@@ -55,16 +73,33 @@ export function Dropdown<T extends string>({
       document.removeEventListener("mousedown", onPointerDown);
       document.removeEventListener("keydown", onKey);
     };
-  }, [open]);
+  }, [close, open]);
+
+  const moveOptionFocus = (direction: 1 | -1) => {
+    const enabled = Array.from(
+      listboxRef.current?.querySelectorAll<HTMLButtonElement>("button:not(:disabled)") ?? [],
+    );
+    if (enabled.length === 0) return;
+    const current = enabled.indexOf(document.activeElement as HTMLButtonElement);
+    const next = current < 0
+      ? direction === 1 ? 0 : enabled.length - 1
+      : (current + direction + enabled.length) % enabled.length;
+    enabled[next].focus();
+  };
 
   return (
     <div ref={rootRef} style={{ position: "relative", display: "inline-block" }}>
       <button
+        ref={triggerRef}
         type="button"
         aria-label={ariaLabel}
         aria-haspopup="listbox"
         aria-expanded={open}
-        onClick={() => setOpen((v) => !v)}
+        aria-controls={listboxId}
+        onClick={() => {
+          if (open) close();
+          else setOpen(true);
+        }}
         className="hover-area"
         style={{
           display: "inline-flex",
@@ -97,7 +132,28 @@ export function Dropdown<T extends string>({
 
       {open && (
         <div
+          ref={listboxRef}
+          id={listboxId}
           role="listbox"
+          aria-label={ariaLabel}
+          onKeyDown={(e) => {
+            if (e.key === "ArrowDown") {
+              e.preventDefault();
+              moveOptionFocus(1);
+            } else if (e.key === "ArrowUp") {
+              e.preventDefault();
+              moveOptionFocus(-1);
+            } else if (e.key === "Home") {
+              e.preventDefault();
+              listboxRef.current?.querySelector<HTMLButtonElement>("button:not(:disabled)")?.focus();
+            } else if (e.key === "End") {
+              e.preventDefault();
+              const enabled = listboxRef.current?.querySelectorAll<HTMLButtonElement>(
+                "button:not(:disabled)",
+              );
+              enabled?.[enabled.length - 1]?.focus();
+            }
+          }}
           style={{
             position: "absolute",
             top: "calc(100% + var(--space-xs))",
@@ -128,7 +184,7 @@ export function Dropdown<T extends string>({
                 onClick={() => {
                   if (disabled) return;
                   onChange(opt.id);
-                  setOpen(false);
+                  close();
                 }}
                 className={disabled ? undefined : "hover-area"}
                 style={{
diff --git a/web/src/components/ui/HoverButton.tsx b/web/src/components/ui/HoverButton.tsx
index 3f39770a..50cf415a 100644
--- a/web/src/components/ui/HoverButton.tsx
+++ b/web/src/components/ui/HoverButton.tsx
@@ -32,6 +32,7 @@ export function HoverButton({
       title={title}
       aria-label={title}
       disabled={disabled}
+      data-interaction-state={disabled ? "disabled" : active ? "active" : "enabled"}
       onClick={onClick}
       className={`hover-area${active ? " is-active" : ""}${className ? " " + className : ""}`}
       style={{
@@ -43,7 +44,7 @@ export function HoverButton({
         flex: "0 0 auto",
         color: active ? "var(--text-primary)" : "var(--text-secondary)",
         opacity: disabled ? 0.35 : 1,
-        cursor: disabled ? "default" : "pointer",
+        cursor: disabled ? "not-allowed" : "pointer",
         ...style,
       }}
     >
diff --git a/web/src/components/ui/PanelShell.interaction.test.tsx b/web/src/components/ui/PanelShell.interaction.test.tsx
new file mode 100644
index 00000000..c0415266
--- /dev/null
+++ b/web/src/components/ui/PanelShell.interaction.test.tsx
@@ -0,0 +1,62 @@
+// @vitest-environment happy-dom
+
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it } from "vitest";
+import { useEditorUiStore } from "../../store/uiStore";
+import { PanelShell } from "./PanelShell";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+let container: HTMLDivElement;
+let root: Root;
+
+beforeEach(() => {
+  useEditorUiStore.setState({
+    focusedPanel: "timeline",
+    selectedClipIds: new Set(["clip-1"]),
+    selectedMediaAssetIds: new Set(["asset-1"]),
+  });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+  act(() => {
+    root.render(
+      <PanelShell panel="media">
+        <button type="button">Media child</button>
+      </PanelShell>,
+    );
+  });
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+});
+
+it("control-bbc125bbbf2275f2 focus an editor panel", async () => {
+  const panel = container.querySelector<HTMLElement>("[data-editor-panel='media']")!;
+  const ring = panel.querySelector<HTMLElement>("[data-panel-focus-ring]")!;
+  expect(panel.getAttribute("role")).toBe("region");
+  expect(panel.getAttribute("aria-label")).not.toBe("");
+  expect(panel.tabIndex).toBe(0);
+  expect(panel.dataset.focused).toBe("false");
+  expect(ring.style.opacity).toBe("0");
+
+  await act(async () => {
+    panel.dispatchEvent(new MouseEvent("mousedown", { bubbles: true }));
+  });
+  expect(useEditorUiStore.getState().focusedPanel).toBe("media");
+  expect(useEditorUiStore.getState().selectedClipIds.size).toBe(0);
+  expect(useEditorUiStore.getState().selectedMediaAssetIds).toEqual(new Set(["asset-1"]));
+  expect(panel.dataset.focused).toBe("true");
+  expect(ring.style.opacity).toBe("0.6");
+
+  await act(async () => useEditorUiStore.setState({ focusedPanel: "timeline" }));
+  await act(async () => panel.focus());
+  expect(document.activeElement).toBe(panel);
+  expect(useEditorUiStore.getState().focusedPanel).toBe("media");
+  expect(panel.dataset.focused).toBe("true");
+  expect(ring.style.opacity).toBe("0.6");
+});
diff --git a/web/src/components/ui/PanelShell.tsx b/web/src/components/ui/PanelShell.tsx
index 6bb5580b..0de0be9b 100644
--- a/web/src/components/ui/PanelShell.tsx
+++ b/web/src/components/ui/PanelShell.tsx
@@ -6,6 +6,7 @@
 
 import type { ReactNode } from "react";
 import { useEditorUiStore, type Panel } from "../../store/uiStore";
+import { useT } from "../../i18n";
 
 interface PanelShellProps {
   panel: Panel;
@@ -13,6 +14,7 @@ interface PanelShellProps {
 }
 
 export function PanelShell({ panel, children }: PanelShellProps) {
+  const t = useT();
   const focusedPanel = useEditorUiStore((s) => s.focusedPanel);
   const focusPanel = useEditorUiStore((s) => s.focusPanel);
   const focused = focusedPanel === panel;
@@ -20,44 +22,29 @@ export function PanelShell({ panel, children }: PanelShellProps) {
   return (
     // Outer = base groove color; the inner card is the surface (SPEC §2.5).
     <div
-      style={{
-        position: "relative",
-        width: "100%",
-        height: "100%",
-        background: "var(--bg-base)",
-        padding: "calc(var(--panel-gap) / 2)", // 2.5px
-        minWidth: 0,
-        minHeight: 0,
-      }}
+      data-editor-panel={panel}
+      data-focused={focused ? "true" : "false"}
+      role="region"
+      aria-label={t(`layout.panel.${panel}`)}
+      tabIndex={0}
+      className="editor-panel-shell"
+      style={{ background: "var(--bg-base)" }}
       onMouseDown={() => focusPanel(panel)}
+      onFocus={() => focusPanel(panel)}
     >
       <div
-        style={{
-          position: "relative",
-          width: "100%",
-          height: "100%",
-          background: "var(--bg-surface)",
-          borderRadius: "var(--radius-sm)",
-          overflow: "hidden",
-          display: "flex",
-          flexDirection: "column",
-          minWidth: 0,
-          minHeight: 0,
-        }}
+        className="editor-panel-card"
+        style={{ background: "var(--bg-surface)" }}
       >
         {children}
       </div>
       {/* Focus ring overlay — never intercepts the mouse. */}
       <div
         aria-hidden
+        data-panel-focus-ring
+        className="editor-panel-focus-ring"
         style={{
-          position: "absolute",
-          inset: "calc(var(--panel-gap) / 2)",
-          borderRadius: "var(--radius-sm)",
-          border: "var(--bw-medium) solid var(--accent-primary)",
           opacity: focused ? 0.6 : 0,
-          transition: "opacity var(--anim-transition) var(--ease-out)",
-          pointerEvents: "none",
         }}
       />
     </div>
diff --git a/web/src/components/ui/interactionStateMatrix.test.tsx b/web/src/components/ui/interactionStateMatrix.test.tsx
new file mode 100644
index 00000000..8ab898df
--- /dev/null
+++ b/web/src/components/ui/interactionStateMatrix.test.tsx
@@ -0,0 +1,60 @@
+// @vitest-environment happy-dom
+
+import { renderToStaticMarkup } from "react-dom/server";
+import { expect, it, vi } from "vitest";
+import { ScrubbableNumberField } from "../inspector/ScrubbableNumberField";
+import { SplitPane } from "../shell/SplitPane";
+import { HoverButton } from "./HoverButton";
+
+vi.mock("../../i18n", () => ({ useT: () => (key: string) => key }));
+
+it("all_enabled_disabled_hover_focus_and_cursor_modes", () => {
+  const enabledButton = renderToStaticMarkup(<HoverButton title="Play">P</HoverButton>);
+  const disabledButton = renderToStaticMarkup(<HoverButton title="Play" disabled>P</HoverButton>);
+  expect(enabledButton).toContain("cursor:pointer");
+  expect(enabledButton).toContain('data-interaction-state="enabled"');
+  expect(disabledButton).toContain("cursor:not-allowed");
+  expect(disabledButton).toContain('data-interaction-state="disabled"');
+
+  const field = renderToStaticMarkup(
+    <ScrubbableNumberField
+      ariaLabel="Opacity"
+      value={50}
+      min={0}
+      max={100}
+      sensitivity={1}
+      format={String}
+      onCommit={() => undefined}
+    />,
+  );
+  expect(field).toContain('role="spinbutton"');
+  expect(field).toContain('aria-label="Opacity"');
+  expect(field).toContain('tabindex="0"');
+  expect(field).toContain("cursor:ew-resize");
+
+  const disabledField = renderToStaticMarkup(
+    <ScrubbableNumberField
+      ariaLabel="Opacity"
+      disabled
+      value={50}
+      min={0}
+      max={100}
+      sensitivity={1}
+      format={String}
+      onCommit={() => undefined}
+    />,
+  );
+  expect(disabledField).toContain('aria-disabled="true"');
+  expect(disabledField).toContain('tabindex="-1"');
+  expect(disabledField).toContain("cursor:not-allowed");
+
+  const horizontal = renderToStaticMarkup(
+    <SplitPane mode="horizontal" initial={300} first={<div />} second={<div />} />,
+  );
+  const vertical = renderToStaticMarkup(
+    <SplitPane mode="vertical" initial={300} first={<div />} second={<div />} />,
+  );
+  expect(horizontal).toContain('role="separator"');
+  expect(horizontal).toContain("cursor:col-resize");
+  expect(vertical).toContain("cursor:row-resize");
+});
diff --git a/web/src/hooks/useKeyboardShortcuts.matrix.test.ts b/web/src/hooks/useKeyboardShortcuts.matrix.test.ts
new file mode 100644
index 00000000..dd7fa4b2
--- /dev/null
+++ b/web/src/hooks/useKeyboardShortcuts.matrix.test.ts
@@ -0,0 +1,101 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+import {
+  resolveDocumentedShortcut,
+  type DocumentedShortcutContext,
+  type ResolvedShortcut,
+} from "./useKeyboardShortcuts";
+
+function event(overrides: Partial<KeyboardEvent>): KeyboardEvent {
+  return {
+    code: "Space",
+    metaKey: false,
+    ctrlKey: false,
+    altKey: false,
+    shiftKey: false,
+    repeat: false,
+    target: null,
+    ...overrides,
+  } as KeyboardEvent;
+}
+
+const base: DocumentedShortcutContext = {
+  view: "editor",
+  blocked: false,
+  focusedPanel: "timeline",
+  compatibilityReadOnly: false,
+  cropEditingActive: false,
+};
+
+type MatrixRow = [string, Partial<KeyboardEvent>, Partial<DocumentedShortcutContext>, ResolvedShortcut];
+
+describe("documented shortcut resolver", () => {
+  it("all_shortcuts_conflicts_editable_suppression_and_platform_modifiers", () => {
+    const rows: MatrixRow[] = [
+      ["space", { code: "Space" }, {}, { type: "transport" }],
+      ["frame left", { code: "ArrowLeft" }, {}, { type: "stepFrame", delta: -1 }],
+      ["frame right 5", { code: "ArrowRight", shiftKey: true }, {}, { type: "stepFrame", delta: 5 }],
+      ["media left", { code: "ArrowLeft" }, { focusedPanel: "media" }, { type: "moveMediaSelection", delta: -1 }],
+      ["media down", { code: "ArrowDown" }, { focusedPanel: "media" }, { type: "moveMediaSelection", delta: 1 }],
+      ["delete", { code: "Backspace" }, {}, { type: "delete", ripple: false }],
+      ["ripple delete", { code: "Delete", shiftKey: true }, {}, { type: "delete", ripple: true }],
+      ["razor", { code: "KeyC" }, {}, { type: "setTool", tool: "razor" }],
+      ["pointer", { code: "KeyV" }, {}, { type: "setTool", tool: "pointer" }],
+      ["mark in", { code: "KeyI" }, {}, { type: "markRange", edge: "start" }],
+      ["mark out", { code: "KeyO" }, {}, { type: "markRange", edge: "end" }],
+      ["trim bracket left", { code: "BracketLeft" }, {}, { type: "trimStart" }],
+      ["trim bracket right", { code: "BracketRight" }, {}, { type: "trimEnd" }],
+      ["trim Q", { code: "KeyQ" }, {}, { type: "trimStart" }],
+      ["trim W", { code: "KeyW" }, {}, { type: "trimEnd" }],
+      ["maximize", { code: "Backquote" }, {}, { type: "maximize" }],
+      ["media return", { code: "Enter" }, { focusedPanel: "media" }, { type: "mediaEnter" }],
+      ["crop return", { code: "Enter" }, { cropEditingActive: true }, { type: "exitCrop" }],
+      ["escape", { code: "Escape" }, {}, { type: "escape" }],
+      ["undo mac", { code: "KeyZ", metaKey: true }, {}, { type: "history", redo: false }],
+      ["redo windows", { code: "KeyZ", ctrlKey: true, shiftKey: true }, {}, { type: "history", redo: true }],
+      ["copy", { code: "KeyC", metaKey: true }, {}, { type: "clipboard", action: "copy" }],
+      ["cut", { code: "KeyX", ctrlKey: true }, {}, { type: "clipboard", action: "cut" }],
+      ["paste", { code: "KeyV", metaKey: true }, {}, { type: "clipboard", action: "paste" }],
+      ["split", { code: "KeyK", metaKey: true }, {}, { type: "split" }],
+      ["new", { code: "KeyN", metaKey: true }, {}, { type: "application", id: "new" }],
+      ["open", { code: "KeyO", ctrlKey: true }, {}, { type: "application", id: "open" }],
+      ["save", { code: "KeyS", metaKey: true }, {}, { type: "application", id: "save" }],
+      ["save as", { code: "KeyS", ctrlKey: true, shiftKey: true }, {}, { type: "application", id: "saveAs" }],
+      ["import", { code: "KeyI", metaKey: true }, {}, { type: "application", id: "importMedia" }],
+      ["export", { code: "KeyE", ctrlKey: true }, {}, { type: "application", id: "export" }],
+      ["media panel", { code: "Digit0", metaKey: true }, {}, { type: "application", id: "mediaPanel" }],
+      ["inspector", { code: "Digit0", ctrlKey: true, altKey: true }, {}, { type: "application", id: "inspector" }],
+      ["agent", { code: "KeyA", metaKey: true, altKey: true }, {}, { type: "application", id: "agentPanel" }],
+      ["layout", { code: "Digit2", ctrlKey: true }, {}, { type: "application", id: "layoutMedia" }],
+      ["fullscreen", { code: "KeyF", metaKey: true }, {}, { type: "application", id: "fullscreen" }],
+      ["help", { code: "Slash", ctrlKey: true, shiftKey: true }, {}, { type: "application", id: "shortcuts" }],
+      ["settings", { code: "Comma", metaKey: true }, {}, { type: "application", id: "settings" }],
+    ];
+
+    for (const [name, keys, context, expected] of rows) {
+      expect(resolveDocumentedShortcut(event(keys), { ...base, ...context }), name).toEqual(expected);
+    }
+
+    for (const context of [
+      { ...base, view: "home" as const },
+      { ...base, blocked: true },
+    ]) {
+      expect(resolveDocumentedShortcut(event({ code: "KeyS", metaKey: true }), context)).toBeNull();
+    }
+    expect(
+      resolveDocumentedShortcut(
+        event({ code: "KeyS", metaKey: true, target: document.createElement("input") }),
+        base,
+      ),
+    ).toBeNull();
+    expect(resolveDocumentedShortcut(event({ code: "Space", shiftKey: true }), base)).toBeNull();
+    expect(resolveDocumentedShortcut(event({ code: "KeyS", metaKey: true, altKey: true }), base)).toBeNull();
+    expect(
+      resolveDocumentedShortcut(event({ code: "BracketLeft" }), {
+        ...base,
+        compatibilityReadOnly: true,
+      }),
+    ).toBeNull();
+  });
+});
diff --git a/web/src/hooks/useKeyboardShortcuts.test.ts b/web/src/hooks/useKeyboardShortcuts.test.ts
index dc7e7a9d..37a65186 100644
--- a/web/src/hooks/useKeyboardShortcuts.test.ts
+++ b/web/src/hooks/useKeyboardShortcuts.test.ts
@@ -1,8 +1,10 @@
 import { describe, expect, it } from "vitest";
 import {
+  DOCUMENTED_SHORTCUT_ROWS,
   handleAgentPanelKeyDown,
   handleProjectSaveKeyDown,
   handleTransportSpaceKeyDown,
+  resolveDocumentedShortcut,
   shouldHandleTransportSpaceKey,
 } from "./useKeyboardShortcuts";
 
@@ -124,6 +126,52 @@ describe("project save shortcut", () => {
     expect(prevented).toBe(1);
     expect(saves).toBe(0);
   });
+
+  it("complete_documented_shortcut_table", () => {
+    expect(DOCUMENTED_SHORTCUT_ROWS).toEqual([
+      "transport",
+      "timeline-arrows",
+      "media-arrows",
+      "delete",
+      "tools",
+      "range",
+      "trim",
+      "maximize",
+      "return-escape",
+      "undo-redo",
+      "clipboard",
+      "split",
+      "file",
+      "panels",
+      "layouts",
+      "fullscreen",
+      "help",
+      "settings",
+    ]);
+
+    const context = {
+      view: "editor" as const,
+      blocked: false,
+      focusedPanel: "timeline" as const,
+      compatibilityReadOnly: false,
+      cropEditingActive: false,
+    };
+    expect(resolveDocumentedShortcut(event({ code: "BracketLeft" }), context)).toEqual({
+      type: "trimStart",
+    });
+    expect(resolveDocumentedShortcut(event({ code: "BracketRight" }), context)).toEqual({
+      type: "trimEnd",
+    });
+    expect(
+      resolveDocumentedShortcut(
+        event({ code: "KeyS", metaKey: true, shiftKey: true }),
+        context,
+      ),
+    ).toEqual({ type: "application", id: "saveAs" });
+    expect(
+      resolveDocumentedShortcut(event({ code: "Slash", ctrlKey: true, shiftKey: true }), context),
+    ).toEqual({ type: "application", id: "shortcuts" });
+  });
 });
 
 describe("Agent panel shortcut", () => {
diff --git a/web/src/hooks/useKeyboardShortcuts.ts b/web/src/hooks/useKeyboardShortcuts.ts
index 5774d517..2fc79598 100644
--- a/web/src/hooks/useKeyboardShortcuts.ts
+++ b/web/src/hooks/useKeyboardShortcuts.ts
@@ -9,6 +9,7 @@ import { useEffect } from "react";
 import { useEditorUiStore } from "../store/uiStore";
 import { useProjectStore } from "../store/projectStore";
 import { useClipboardStore } from "../store/clipboardStore";
+import { useMediaStore } from "../store/mediaStore";
 import { t } from "../i18n";
 import * as edit from "../store/editActions";
 import { saveCurrentProject } from "../store/projectActions";
@@ -17,6 +18,7 @@ import type { AppView } from "../store/uiStore";
 import { isTauri } from "../lib/api";
 import { resolveTimelinePlaybackRoute } from "../components/preview/playbackRoute";
 import { rustEngineEnabled } from "../components/preview/rustEngine";
+import { runApplicationMenuCommand } from "../components/shell/ViewMenu";
 
 /** Per-keypress zoom step for ⌘+ / ⌘- (剪映: Cmd + +/-). */
 const ZOOM_KEY_STEP = 1.3;
@@ -28,6 +30,241 @@ function isTextEntry(target: EventTarget | null): boolean {
   return tag === "INPUT" || tag === "TEXTAREA" || target.isContentEditable;
 }
 
+export const DOCUMENTED_SHORTCUT_ROWS = [
+  "transport",
+  "timeline-arrows",
+  "media-arrows",
+  "delete",
+  "tools",
+  "range",
+  "trim",
+  "maximize",
+  "return-escape",
+  "undo-redo",
+  "clipboard",
+  "split",
+  "file",
+  "panels",
+  "layouts",
+  "fullscreen",
+  "help",
+  "settings",
+] as const;
+
+export interface DocumentedShortcutContext {
+  view: AppView;
+  blocked: boolean;
+  focusedPanel: "agent" | "media" | "preview" | "inspector" | "timeline" | null;
+  compatibilityReadOnly: boolean;
+  cropEditingActive: boolean;
+}
+
+export type ResolvedShortcut =
+  | { type: "transport" }
+  | { type: "stepFrame"; delta: number }
+  | { type: "moveMediaSelection"; delta: number }
+  | { type: "delete"; ripple: boolean }
+  | { type: "setTool"; tool: "pointer" | "razor" }
+  | { type: "markRange"; edge: "start" | "end" }
+  | { type: "trimStart" }
+  | { type: "trimEnd" }
+  | { type: "maximize" }
+  | { type: "mediaEnter" }
+  | { type: "exitCrop" }
+  | { type: "escape" }
+  | { type: "history"; redo: boolean }
+  | { type: "clipboard"; action: "copy" | "cut" | "paste" | "selectAll" }
+  | { type: "split" }
+  | {
+      type: "application";
+      id:
+        | "settings"
+        | "new"
+        | "open"
+        | "save"
+        | "saveAs"
+        | "importMedia"
+        | "export"
+        | "mediaPanel"
+        | "inspector"
+        | "agentPanel"
+        | "layoutDefault"
+        | "layoutMedia"
+        | "layoutVertical"
+        | "fullscreen"
+        | "shortcuts";
+    };
+
+function isMutationShortcut(command: ResolvedShortcut): boolean {
+  if (
+    command.type === "delete" ||
+    command.type === "trimStart" ||
+    command.type === "trimEnd" ||
+    command.type === "split" ||
+    command.type === "history"
+  ) {
+    return true;
+  }
+  if (command.type === "clipboard") {
+    return command.action === "cut" || command.action === "paste";
+  }
+  return (
+    command.type === "application" &&
+    (command.id === "save" || command.id === "saveAs" || command.id === "importMedia")
+  );
+}
+
+/** Pure, table-driven §9.6 keyboard boundary. It resolves one physical key to
+ * one semantic command only after view, modal, editable-target, platform
+ * modifier, and compatibility-read-only rules have all been applied. */
+export function resolveDocumentedShortcut(
+  e: KeyboardEvent,
+  context: DocumentedShortcutContext,
+): ResolvedShortcut | null {
+  if (context.view !== "editor" || context.blocked || isTextEntry(e.target)) return null;
+  const mod = e.metaKey || e.ctrlKey;
+  let command: ResolvedShortcut | null = null;
+
+  if (mod) {
+    if (e.altKey) {
+      if (!e.shiftKey && e.code === "Digit0") command = { type: "application", id: "inspector" };
+      else if (!e.shiftKey && e.code === "KeyA") command = { type: "application", id: "agentPanel" };
+    } else {
+      switch (e.code) {
+        case "KeyZ":
+          command = { type: "history", redo: e.shiftKey };
+          break;
+        case "KeyC":
+          if (!e.shiftKey) command = { type: "clipboard", action: "copy" };
+          break;
+        case "KeyX":
+          if (!e.shiftKey) command = { type: "clipboard", action: "cut" };
+          break;
+        case "KeyV":
+          if (!e.shiftKey) command = { type: "clipboard", action: "paste" };
+          break;
+        case "KeyA":
+          if (!e.shiftKey) command = { type: "clipboard", action: "selectAll" };
+          break;
+        case "KeyK":
+        case "KeyB":
+          if (!e.shiftKey) command = { type: "split" };
+          break;
+        case "KeyN":
+          if (!e.shiftKey) command = { type: "application", id: "new" };
+          break;
+        case "KeyO":
+          if (!e.shiftKey) command = { type: "application", id: "open" };
+          break;
+        case "KeyS":
+          command = { type: "application", id: e.shiftKey ? "saveAs" : "save" };
+          break;
+        case "KeyI":
+          if (!e.shiftKey) command = { type: "application", id: "importMedia" };
+          break;
+        case "KeyE":
+          if (!e.shiftKey) command = { type: "application", id: "export" };
+          break;
+        case "Digit0":
+          if (!e.shiftKey) command = { type: "application", id: "mediaPanel" };
+          break;
+        case "Digit1":
+          if (!e.shiftKey) command = { type: "application", id: "layoutDefault" };
+          break;
+        case "Digit2":
+          if (!e.shiftKey) command = { type: "application", id: "layoutMedia" };
+          break;
+        case "Digit3":
+          if (!e.shiftKey) command = { type: "application", id: "layoutVertical" };
+          break;
+        case "KeyF":
+          if (!e.shiftKey) command = { type: "application", id: "fullscreen" };
+          break;
+        case "Slash":
+          if (e.shiftKey) command = { type: "application", id: "shortcuts" };
+          break;
+        case "Comma":
+          if (!e.shiftKey) command = { type: "application", id: "settings" };
+          break;
+      }
+    }
+  } else if (!e.altKey) {
+    switch (e.code) {
+      case "Space":
+        if (!e.shiftKey) command = { type: "transport" };
+        break;
+      case "ArrowLeft":
+      case "ArrowRight":
+        if (context.focusedPanel === "media") {
+          if (!e.shiftKey) {
+            command = { type: "moveMediaSelection", delta: e.code === "ArrowLeft" ? -1 : 1 };
+          }
+        } else {
+          command = { type: "stepFrame", delta: (e.code === "ArrowLeft" ? -1 : 1) * (e.shiftKey ? 5 : 1) };
+        }
+        break;
+      case "ArrowUp":
+      case "ArrowDown":
+        if (context.focusedPanel === "media" && !e.shiftKey) {
+          command = { type: "moveMediaSelection", delta: e.code === "ArrowUp" ? -1 : 1 };
+        }
+        break;
+      case "Backspace":
+      case "Delete":
+        command = { type: "delete", ripple: e.shiftKey };
+        break;
+      case "KeyC":
+      case "KeyB":
+        if (!e.shiftKey) command = { type: "setTool", tool: "razor" };
+        break;
+      case "KeyV":
+      case "KeyA":
+        if (!e.shiftKey) command = { type: "setTool", tool: "pointer" };
+        break;
+      case "KeyI":
+        if (!e.shiftKey) command = { type: "markRange", edge: "start" };
+        break;
+      case "KeyO":
+        if (!e.shiftKey) command = { type: "markRange", edge: "end" };
+        break;
+      case "BracketLeft":
+      case "KeyQ":
+        if (!e.shiftKey) command = { type: "trimStart" };
+        break;
+      case "BracketRight":
+      case "KeyW":
+        if (!e.shiftKey) command = { type: "trimEnd" };
+        break;
+      case "Backquote":
+        if (!e.shiftKey) command = { type: "maximize" };
+        break;
+      case "Enter":
+      case "NumpadEnter":
+        if (!e.shiftKey) {
+          if (context.cropEditingActive) command = { type: "exitCrop" };
+          else if (context.focusedPanel === "media") command = { type: "mediaEnter" };
+        }
+        break;
+      case "Escape":
+        if (!e.shiftKey) command = { type: "escape" };
+        break;
+    }
+  }
+
+  if (command && context.compatibilityReadOnly && isMutationShortcut(command)) return null;
+  return command;
+}
+
+function shortcutSurfaceBlocked(ui: ReturnType<typeof useEditorUiStore.getState>): boolean {
+  return Boolean(
+    ui.settingsOpen ||
+      ui.exportDialogOpen ||
+      ui.saveAsProgress ||
+      ui.projectSettingsPrompt ||
+      ui.pendingSwapClipId,
+  );
+}
+
 export function shouldHandleTransportSpaceKey(e: KeyboardEvent, view: AppView): boolean {
   return (
     view === "editor" &&
@@ -35,6 +272,7 @@ export function shouldHandleTransportSpaceKey(e: KeyboardEvent, view: AppView):
     !e.metaKey &&
     !e.ctrlKey &&
     !e.altKey &&
+    !e.shiftKey &&
     !isTextEntry(e.target)
   );
 }
@@ -69,7 +307,15 @@ export function handleProjectSaveKeyDown(
     void saveCurrentProject();
   },
 ): boolean {
-  if (e.code !== "KeyS" || (!e.metaKey && !e.ctrlKey)) return false;
+  if (
+    e.code !== "KeyS" ||
+    (!e.metaKey && !e.ctrlKey) ||
+    e.altKey ||
+    e.shiftKey ||
+    isTextEntry(e.target)
+  ) {
+    return false;
+  }
   e.preventDefault();
   if (!e.repeat) save();
   return true;
@@ -85,6 +331,7 @@ export function handleAgentPanelKeyDown(
     view !== "editor" ||
     e.code !== "KeyA" ||
     !e.altKey ||
+    e.shiftKey ||
     (!e.metaKey && !e.ctrlKey) ||
     isTextEntry(e.target)
   ) {
@@ -95,10 +342,63 @@ export function handleAgentPanelKeyDown(
   return true;
 }
 
+interface ViewShortcutUi {
+  view: AppView;
+  setLayoutPreset: (preset: "default" | "media" | "vertical") => void;
+  toggleAgentPanel: () => void;
+  toggleMediaPanel: () => void;
+  toggleInspectorPanel: () => void;
+  toggleMaximizedFocusedPanel: () => void;
+  toggleFullscreen: () => Promise<void>;
+}
+
+/** Shared View-command accelerator boundary used by the app menu and the
+ *  global key listener. Returning true means the native/browser shortcut was
+ *  consumed, including held-key repeats (which are intentionally no-ops). */
+export function handleViewShortcutKeyDown(e: KeyboardEvent, ui: ViewShortcutUi): boolean {
+  if (ui.view !== "editor" || isTextEntry(e.target)) return false;
+  const mod = e.metaKey || e.ctrlKey;
+  let action: (() => void) | undefined;
+
+  if (mod) {
+    if (e.altKey && !e.shiftKey && e.code === "KeyA") action = ui.toggleAgentPanel;
+    else if (!e.shiftKey && e.code === "Digit0") {
+      action = e.altKey ? ui.toggleInspectorPanel : ui.toggleMediaPanel;
+    } else if (!e.altKey && !e.shiftKey && e.code === "Digit1") {
+      action = () => ui.setLayoutPreset("default");
+    } else if (!e.altKey && !e.shiftKey && e.code === "Digit2") {
+      action = () => ui.setLayoutPreset("media");
+    } else if (!e.altKey && !e.shiftKey && e.code === "Digit3") {
+      action = () => ui.setLayoutPreset("vertical");
+    } else if (!e.altKey && !e.shiftKey && e.code === "KeyF") {
+      action = () => void ui.toggleFullscreen();
+    }
+  } else if (!e.altKey && !e.shiftKey && e.code === "Backquote") {
+    action = ui.toggleMaximizedFocusedPanel;
+  }
+
+  if (!action) return false;
+  e.preventDefault();
+  if (!e.repeat) action();
+  return true;
+}
+
 export function useKeyboardShortcuts() {
   useEffect(() => {
+    const context = (): DocumentedShortcutContext => {
+      const ui = useEditorUiStore.getState();
+      return {
+        view: ui.view,
+        blocked: shortcutSurfaceBlocked(ui),
+        focusedPanel: ui.focusedPanel,
+        compatibilityReadOnly: useProjectStore.getState().compatibilityReadOnly,
+        cropEditingActive: ui.cropEditingActive,
+      };
+    };
+
     const handleSpaceKeyDown = (e: KeyboardEvent) => {
       const ui = useEditorUiStore.getState();
+      if (resolveDocumentedShortcut(e, context())?.type !== "transport") return;
       const timeline = useProjectStore.getState().timeline;
       const route = resolveTimelinePlaybackRoute(timeline, {
         rustAvailable: isTauri,
@@ -109,19 +409,23 @@ export function useKeyboardShortcuts() {
         timelinePlaybackAllowed: route.kind !== "unsupported",
       });
     };
+
+    const moveMediaSelection = (delta: number) => {
+      const ui = useEditorUiStore.getState();
+      const items = useMediaStore.getState().items;
+      if (items.length === 0) return;
+      const selected = [...ui.selectedMediaAssetIds][0];
+      const found = items.findIndex((item) => item.id === selected);
+      const current = found >= 0 ? found : delta < 0 ? items.length : -1;
+      const next = Math.max(0, Math.min(items.length - 1, current + delta));
+      ui.selectMediaAssets(new Set([items[next]!.id]));
+    };
+
     const handler = (e: KeyboardEvent) => {
-      if (isTextEntry(e.target)) return;
       const ui = useEditorUiStore.getState();
-      // Editor-only shortcuts: ignore while the Home / Settings views are shown.
-      if (ui.view !== "editor") return;
+      const command = resolveDocumentedShortcut(e, context());
       const mod = e.metaKey || e.ctrlKey;
-      const total = (() => {
-        const tl = useProjectStore.getState().timeline;
-        let m = 0;
-        for (const t of tl.tracks)
-          for (const c of t.clips) m = Math.max(m, c.startFrame + c.durationFrames);
-        return m;
-      })();
+      const total = edit.currentTimelineEndFrame();
 
       // Zoom the timeline by `factor`, keeping the playhead stationary on screen
       // (剪映 zooms around the current position). Uses existing store actions.
@@ -135,171 +439,129 @@ export function useKeyboardShortcuts() {
         ui.setScroll(Math.max(0, f * (next - old) + ui.scrollLeft), ui.scrollTop);
       };
 
-      if (handleProjectSaveKeyDown(e)) return;
-      if (handleAgentPanelKeyDown(e, ui.view, ui.toggleAgentPanel)) return;
-
-      // Cmd-modified actions.
-      if (mod) {
-        switch (e.code) {
-          case "KeyZ":
-            e.preventDefault();
-            if (e.shiftKey) edit.redo();
-            else edit.undo();
+      if (command) {
+        e.preventDefault();
+        // Frame/media navigation intentionally follows held-key repeats. Every
+        // other command is a one-shot and is consumed without re-running.
+        if (e.repeat && command.type !== "stepFrame" && command.type !== "moveMediaSelection") {
+          return;
+        }
+        switch (command.type) {
+          case "transport":
+            // The capture listener owns Space so media/timeline playback toggles
+            // before nested controls can consume it.
+            return;
+          case "stepFrame":
+            ui.setCurrentFrame(Math.max(0, Math.min(total, ui.activeFrame + command.delta)));
+            return;
+          case "moveMediaSelection":
+            moveMediaSelection(command.delta);
+            return;
+          case "delete":
+            if (ui.focusedPanel === "media") {
+              runApplicationMenuCommand("delete");
+              return;
+            }
+            if (command.ripple) {
+            // ⇧⌫ ripple-deletes (closes the gap). Route like upstream's
+            // EditorWindowController: a selected gap closes first; else a marked
+            // range on the selected clip's track; else the selected clips.
+              if (ui.selectedGap) {
+                void edit.rippleDeleteSelectedGap();
+              } else {
+                void (async () => {
+                  if (!(await edit.rippleDeleteMarkedRange())) {
+                    await edit.rippleDeleteSelectedClips();
+                  }
+                })();
+              }
+            } else {
+              void edit.deleteSelectedClips();
+            }
             return;
-          // ⌘+ / ⌘- zoom in/out (剪映 Cmd + +/-). "Equal" is the +/= key.
-          case "Equal":
-          case "NumpadAdd":
-            e.preventDefault();
-            zoomBy(ZOOM_KEY_STEP);
+          case "setTool":
+            ui.setToolMode(command.tool);
             return;
-          case "Minus":
-          case "NumpadSubtract":
-            e.preventDefault();
-            zoomBy(1 / ZOOM_KEY_STEP);
+          case "markRange":
+            if (command.edge === "start") ui.markRangeStart(Math.round(ui.activeFrame));
+            else ui.markRangeEnd(Math.round(ui.activeFrame));
             return;
-          case "KeyK":
-          case "KeyB":
-            // ⌘K (existing) and ⌘B (剪映 split-at-playhead) both split.
-            e.preventDefault();
-            edit.splitAtPlayhead();
+          case "trimStart":
+            void edit.trimStartToPlayhead();
             return;
-          case "Digit1":
-            e.preventDefault();
-            ui.setLayoutPreset("default");
+          case "trimEnd":
+            void edit.trimEndToPlayhead();
             return;
-          case "Digit2":
-            e.preventDefault();
-            ui.setLayoutPreset("media");
+          case "maximize":
+            ui.toggleMaximizedFocusedPanel();
             return;
-          case "Digit3":
-            e.preventDefault();
-            ui.setLayoutPreset("vertical");
+          case "mediaEnter": {
+            const folder = [...ui.selectedFolderIds][0];
+            if (folder) ui.setMediaPanelCurrentFolderId(folder);
+            else {
+              const media = [...ui.selectedMediaAssetIds][0];
+              if (media) ui.setPreviewMedia(media);
+            }
             return;
-          case "Digit0":
-            e.preventDefault();
-            if (e.altKey) ui.toggleInspectorPanel();
-            else ui.toggleMediaPanel();
+          }
+          case "exitCrop":
+            ui.setCropEditingActive(false);
             return;
-          case "KeyC":
-            e.preventDefault();
-            edit.copyClips();
+          case "escape":
+            if (ui.cropEditingActive) ui.setCropEditingActive(false);
+            else if (ui.maximizedPanel) ui.setMaximizedPanel(null);
+            else {
+              ui.clearSelection();
+              ui.clearTimelineRange();
+              ui.setToolMode("pointer");
+            }
             return;
-          case "KeyX":
-            e.preventDefault();
-            void edit.cutClips();
+          case "history":
+            void (command.redo ? edit.redo() : edit.undo());
             return;
-          case "KeyV":
-            e.preventDefault();
-            if (!useClipboardStore.getState().hasContent) {
-              useEditorUiStore.getState().pushToast(t("edit.clipboardEmpty"));
-              return;
+          case "clipboard":
+            if (command.action === "copy") edit.copyClips();
+            else if (command.action === "cut") void edit.cutClips();
+            else if (command.action === "selectAll") runApplicationMenuCommand("selectAll");
+            else if (!useClipboardStore.getState().hasContent) {
+              ui.pushToast(t("edit.clipboardEmpty"));
+            } else {
+              void edit.pasteClipsAtPlayhead();
             }
-            void edit.pasteClipsAtPlayhead();
+            return;
+          case "split":
+            void edit.splitAtPlayhead();
+            return;
+          case "application":
+            runApplicationMenuCommand(command.id);
             return;
         }
-        return;
       }
 
-      // Unmodified keys.
-      switch (e.code) {
-        case "ArrowLeft":
-          e.preventDefault();
-          ui.setCurrentFrame(Math.max(0, ui.activeFrame - (e.shiftKey ? 5 : 1)));
-          return;
-        case "ArrowRight":
-          e.preventDefault();
-          ui.setCurrentFrame(Math.min(total, ui.activeFrame + (e.shiftKey ? 5 : 1)));
-          return;
-        case "Backspace":
-        case "Delete":
-          e.preventDefault();
-          if (e.shiftKey) {
-            // ⇧⌫ ripple-deletes (closes the gap). Route like upstream's
-            // EditorWindowController: a selected gap closes first; else a marked
-            // range on the selected clip's track; else the selected clips.
-            if (ui.selectedGap) {
-              void edit.rippleDeleteSelectedGap();
-            } else {
-              void (async () => {
-                if (!(await edit.rippleDeleteMarkedRange())) {
-                  await edit.rippleDeleteSelectedClips();
-                }
-              })();
-            }
-          } else {
-            // Plain ⌫ lifts out (leaves a gap).
-            void edit.deleteSelectedClips();
-          }
-          return;
-        case "KeyQ":
-          // 剪映 Q：删除播放头左侧（修剪入点到播放头）。
-          e.preventDefault();
-          edit.trimStartToPlayhead();
-          return;
-        case "KeyW":
-          // 剪映 W：删除播放头右侧（修剪出点到播放头）。
-          e.preventDefault();
-          edit.trimEndToPlayhead();
-          return;
-        case "KeyI":
-          // I: mark the range IN point at the playhead (upstream keyCode 34
-          // markTimelineRangeStart). No modifiers (matches upstream's
-          // `rangeMarkShortcut` = no Cmd/Alt/Ctrl).
-          e.preventDefault();
-          ui.markRangeStart(Math.round(ui.activeFrame));
-          return;
-        case "KeyO":
-          // O: mark the range OUT point at the playhead (upstream keyCode 31
-          // markTimelineRangeEnd).
-          e.preventDefault();
-          ui.markRangeEnd(Math.round(ui.activeFrame));
-          return;
-        case "Comma":
-          // OpenTake extension (NOT upstream): nudge selected clips left by 1
-          // frame (5 with Shift). , / . is the NLE nudge convention; arrows are
-          // the playhead (upstream-correct), so nudge gets its own keys.
+      // OpenTake extensions outside the pinned upstream table. These use the
+      // same modal/editable/view boundary but stay visibly separate in code.
+      if (context().view !== "editor" || context().blocked || isTextEntry(e.target)) return;
+      if (mod && !e.altKey && !e.shiftKey) {
+        if (e.code === "Equal" || e.code === "NumpadAdd") {
           e.preventDefault();
-          void edit.nudgeSelectedClips(e.shiftKey ? -5 : -1);
-          return;
-        case "Period":
-          // OpenTake extension (NOT upstream): nudge selected clips right by 1
-          // frame (5 with Shift).
+          if (!e.repeat) zoomBy(ZOOM_KEY_STEP);
+        } else if (e.code === "Minus" || e.code === "NumpadSubtract") {
           e.preventDefault();
-          void edit.nudgeSelectedClips(e.shiftKey ? 5 : 1);
-          return;
-        case "KeyC":
-        case "KeyB":
-          // C (existing) and B (剪映 切割模式) both enter the razor/blade tool.
-          ui.setToolMode("razor");
-          return;
-        case "KeyV":
-        case "KeyA":
-          // V (existing) and A (剪映 选择模式) both return to the pointer tool.
-          ui.setToolMode("pointer");
-          return;
-        case "KeyZ":
-          // ⇧Z fits the whole timeline to the window (剪映 Shift+Z 适配窗口).
-          if (e.shiftKey) {
-            e.preventDefault();
-            ui.setZoomScale(ui.minZoomScale);
-            ui.setScroll(0, ui.scrollTop);
-          }
-          return;
-        case "Backquote": {
-          e.preventDefault();
-          const focused = ui.focusedPanel;
-          ui.setMaximizedPanel(ui.maximizedPanel ? null : focused);
-          return;
+          if (!e.repeat) zoomBy(1 / ZOOM_KEY_STEP);
+        }
+        return;
+      }
+      if (!mod && !e.altKey && (e.code === "Comma" || e.code === "Period")) {
+        e.preventDefault();
+        if (!e.repeat && !useProjectStore.getState().compatibilityReadOnly) {
+          void edit.nudgeSelectedClips((e.code === "Comma" ? -1 : 1) * (e.shiftKey ? 5 : 1));
+        }
+      } else if (!mod && !e.altKey && e.shiftKey && e.code === "KeyZ") {
+        e.preventDefault();
+        if (!e.repeat) {
+          ui.setZoomScale(ui.minZoomScale);
+          ui.setScroll(0, ui.scrollTop);
         }
-        case "Escape":
-          if (ui.maximizedPanel) ui.setMaximizedPanel(null);
-          else {
-            // Upstream Escape clears clip selection AND the marked range.
-            ui.clearSelection();
-            ui.clearTimelineRange();
-            ui.setToolMode("pointer");
-          }
-          return;
       }
     };
 
diff --git a/web/src/i18n/dict.ts b/web/src/i18n/dict.ts
index 91ae1f7f..94c8e657 100644
--- a/web/src/i18n/dict.ts
+++ b/web/src/i18n/dict.ts
@@ -26,7 +26,16 @@ const zh: Dict = {
     "此项目包含当前版本无法安全保存的字段。仍可查看项目内容，但编辑和保存已停用。",
   "compatibility.blockerCount.one": "{count} 个兼容性问题",
   "compatibility.blockerCount.many": "{count} 个兼容性问题",
+  "project.createFailed": "创建失败：{error}",
+  "project.openFailed": "打开失败：{error}",
   "project.saveFailed": "保存失败：{error}",
+  "projectSettingsMismatch.title": "素材与项目设置不一致",
+  "projectSettingsMismatch.description":
+    "时间线还没有内容。你可以保留当前项目设置，或改为匹配第一个视频素材。",
+  "projectSettingsMismatch.current": "当前项目",
+  "projectSettingsMismatch.source": "视频素材",
+  "projectSettingsMismatch.keep": "保持当前设置",
+  "projectSettingsMismatch.match": "改为匹配",
 
   // TitleBar
   "title.toggleAgent": "切换 Agent 面板",
@@ -115,6 +124,42 @@ const zh: Dict = {
   "view.agentPanel": "Agent 面板",
   "view.mediaPanel": "媒体面板",
   "view.inspector": "检查器",
+  "view.maximizeFocused": "最大化聚焦面板",
+  "view.enterFullScreen": "进入全屏",
+  "view.fullscreenFailed": "无法切换全屏，请重试",
+  "layout.panel.agent": "Agent 面板",
+  "layout.panel.media": "媒体面板",
+  "layout.panel.preview": "预览面板",
+  "layout.panel.inspector": "检查器面板",
+  "layout.panel.timeline": "时间线面板",
+  "layout.resizePanels": "调整面板大小",
+  "layout.positionPixels": "{value} 像素",
+  "menu.about": "关于 OpenTake",
+  "menu.checkUpdates": "检查更新…（Beta 暂不可用）",
+  "menu.quit": "退出 OpenTake",
+  "menu.file": "文件",
+  "menu.new": "新建",
+  "menu.open": "打开…",
+  "menu.save": "保存",
+  "menu.saveAs": "另存为…",
+  "menu.importMedia": "导入媒体…",
+  "menu.export": "导出…",
+  "menu.edit": "编辑",
+  "menu.undo": "撤销",
+  "menu.redo": "重做",
+  "menu.cut": "剪切",
+  "menu.copy": "复制",
+  "menu.paste": "粘贴",
+  "menu.selectAll": "全选",
+  "menu.split": "在播放头处分割",
+  "menu.trimStart": "将入点修剪到播放头",
+  "menu.trimEnd": "将出点修剪到播放头",
+  "menu.delete": "删除",
+  "menu.help": "帮助",
+  "menu.tutorial": "教程（Beta 暂不可用）",
+  "menu.shortcuts": "键盘快捷键",
+  "menu.feedback": "发送反馈…（Beta 暂不可用）",
+  "menu.installFailed": "无法安装应用菜单，请重启 OpenTake",
 
   // Media panel
   "media.tab.media": "媒体",
@@ -171,6 +216,28 @@ const zh: Dict = {
   "media.sound.add": "添加到项目",
   "media.sound.added": "已添加：{name}",
   "media.sound.failed": "添加失败",
+  "media.music.import": "导入音乐",
+  "media.music.generate": "AI 生成音乐",
+  "media.music.generateDraft": "请为当前工程生成一段音乐。先询问我需要的风格、情绪、时长和是否纯音乐，列出模型与成本并等待我确认后再生成。",
+  "media.music.projectSection": "工程音乐",
+  "media.music.librarySection": "收藏音乐",
+  "media.music.place": "放到时间线",
+  "media.music.importAndPlace": "导入并放置",
+  "media.music.placed": "已放到时间线：{name}",
+  "media.music.placeFailed": "放置失败：{error}",
+  "media.music.importFailed": "未能导入音乐",
+  "media.music.importRefreshFailed": "音乐已导入，但项目媒体列表尚未刷新",
+  "media.music.empty": "这里还没有音乐",
+  "media.transition.selectCut": "请选择时间线上相邻的两个画面片段之一，以编辑它们之间的转场。",
+  "media.transition.crossDissolve": "交叉溶解",
+  "media.transition.crossDissolveDescription": "在切点前平滑混合前后两个画面。",
+  "media.transition.duration": "时长：{frames} 帧（{seconds} 秒）",
+  "media.transition.durationLabel": "转场时长",
+  "media.transition.apply": "应用转场",
+  "media.transition.applying": "正在应用…",
+  "media.transition.remove": "移除",
+  "media.transition.applied": "转场已通过可撤销命令应用。",
+  "media.transition.removed": "转场已移除。",
   "media.offline": "媒体离线",
   "media.relink": "重新链接",
 
@@ -225,6 +292,76 @@ const zh: Dict = {
   "captions.modelReady": "模型已就绪。",
   "captions.desktopOnly": "字幕生成需在桌面应用中使用（whisper）。",
   "captions.failed": "字幕生成失败：{error}",
+  "captions.translation": "字幕翻译",
+  "captions.translation.scope": "将翻译 {count} 条字幕（优先使用已选字幕）",
+  "captions.translation.sourceLocale": "源语言（如 auto、zh-CN）",
+  "captions.translation.targetLocale": "目标语言（如 en-US）",
+  "captions.translation.provider": "翻译 Provider",
+  "captions.translation.costConsent": "我同意将字幕文本发送给所选 Provider，并承担可能的 API 费用。",
+  "captions.translation.accept": "接受翻译：{text}",
+  "captions.translation.translate": "翻译并预览",
+  "captions.translation.translating": "翻译中…",
+  "captions.translation.retry": "重试翻译",
+  "captions.translation.apply": "应用 {count} 条",
+  "captions.translation.applying": "应用中…",
+  "captions.translation.cancel": "取消",
+  "captions.translation.undo": "撤销翻译",
+  "captions.translation.applied": "翻译已应用；字幕 ID 和时间范围保持不变。",
+  "scriptVideo.description": "将文案、已选素材、可选旁白与转场先保存为可审阅计划，再一次性落入时间线。",
+  "scriptVideo.segment": "分镜 {number}",
+  "scriptVideo.remove": "删除",
+  "scriptVideo.script": "分镜 {number} 文案",
+  "scriptVideo.scriptPlaceholder": "输入这一段的文案或画面意图…",
+  "scriptVideo.visual": "画面素材",
+  "scriptVideo.chooseVisual": "选择画面素材",
+  "scriptVideo.narration": "旁白素材",
+  "scriptVideo.noNarration": "无旁白",
+  "scriptVideo.duration": "时长（帧）",
+  "scriptVideo.transition": "与下一段使用交叉溶解",
+  "scriptVideo.addSegment": "添加分镜",
+  "scriptVideo.planSummary": "计划已持久化：{count} 个分镜，帧 {start}–{end}",
+  "scriptVideo.review": "保存并审阅计划",
+  "scriptVideo.planning": "验证与保存计划中…",
+  "scriptVideo.retry": "重试计划",
+  "scriptVideo.apply": "开始成片",
+  "scriptVideo.applying": "正在组装轨道…",
+  "scriptVideo.cancel": "取消",
+  "scriptVideo.undo": "撤销成片",
+  "scriptVideo.applied": "成片已在一个撤销步骤中应用。",
+  "scriptVideo.noVisuals": "请先导入图像、视频或 Lottie 素材。",
+  "smartPack.workflows": "智能工作流",
+  "smartPack.script": "图文成片",
+  "smartPack.avatar": "数字人",
+  "smartPack.voice": "声音克隆",
+  "avatar.description": "使用已获授权的人像与旁白生成唇形同步视频；素材会发送到 fal，结果以一个可撤销步骤导入时间线。",
+  "avatar.portrait": "人像图片",
+  "avatar.audio": "旁白音频",
+  "avatar.startFrame": "起始帧",
+  "avatar.consent": "我确认已获得人像本人及声音权利人的明确授权，并记录本次同意。",
+  "avatar.cost": "我已审阅并授权本次付费生成。",
+  "avatar.preview": "数字人结果预览",
+  "avatar.generate": "生成并导入数字人",
+  "avatar.progress": "上传、生成与验证中…",
+  "avatar.undo": "撤销数字人",
+  "avatar.ready": "数字人已验证并导入（{frames} 帧）。",
+  "voice.description": "向 ElevenLabs 注册已获授权的声音样本，生成可试听音频，或永久撤销提供商声音。",
+  "voice.reference": "授权参考音频",
+  "voice.name": "声音名称",
+  "voice.consent": "我确认已获得声音本人明确授权，并记录本次同意。",
+  "voice.cost": "我已审阅并授权注册/生成费用。",
+  "voice.enroll": "注册声音模型",
+  "voice.model": "已注册声音",
+  "voice.chooseModel": "选择声音模型",
+  "voice.prompt": "要朗读的文本",
+  "voice.audition": "克隆声音试听",
+  "voice.generate": "生成、试听并导入",
+  "voice.progress": "提供商处理中…",
+  "voice.undo": "撤销生成音频",
+  "voice.revoke": "永久撤销声音",
+  "voice.status.enroll": "声音模型已注册并记录来源。",
+  "voice.status.generate": "克隆声音已验证、导入并可试听。",
+  "voice.status.revoke": "声音已在提供商和项目中撤销，不能再次生成。",
+  "common.retry": "重试",
 
   // Inspector
   "inspector.title": "检查器",
@@ -238,6 +375,13 @@ const zh: Dict = {
   "inspector.source.duration": "时长",
   "inspector.source.size": "大小",
   "inspector.source.path": "路径",
+  "inspector.source.hdr": "HDR 色彩",
+  "inspector.source.hdrDelivery": "{transfer} · 预览与导出映射为 BT.709 SDR",
+  "inspector.source.proxy": "代理媒体",
+  "inspector.source.proxyCreate": "生成 720p 代理",
+  "inspector.source.proxyCreating": "正在生成 {progress}%",
+  "inspector.source.proxyReady": "已就绪 · {width} × {height}",
+  "inspector.source.proxyRemove": "移除代理",
   "inspector.source.aiBadge": "AI",
   "inspector.source.references": "引用",
   "inspector.source.generated": "生成信息",
@@ -255,7 +399,130 @@ const zh: Dict = {
   "inspector.tab.video": "视频",
   "inspector.tab.audio": "音频",
   "inspector.tab.aiEdit": "AI 编辑",
+  "inspector.aiEdit.heading": "AI 编辑建议",
+  "inspector.aiEdit.intent": "你希望如何调整这个片段？",
+  "inspector.aiEdit.defaultIntent": "优化这个片段的节奏和观感",
+  "inspector.aiEdit.placeholder": "例如：让开头和结尾更柔和",
+  "inspector.aiEdit.generate": "生成建议",
+  "inspector.aiEdit.generating": "正在分析…",
+  "inspector.aiEdit.cancel": "取消",
+  "inspector.aiEdit.apply": "应用建议",
+  "inspector.aiEdit.applying": "正在应用…",
+  "inspector.aiEdit.reject": "放弃建议",
+  "inspector.aiEdit.undo": "撤销本次应用",
+  "inspector.aiEdit.applied": "建议已通过可撤销编辑命令应用。",
+  "inspector.aiEdit.noSuggestion": "没有生成可应用的建议。",
+  "inspector.aiEdit.unavailable": "当前媒体不可用，无法生成编辑建议。",
+  "inspector.matting.heading": "AI 人像抠像",
+  "inspector.matting.compatibility": "抠像当前支持正向 1x 的普通视频片段。",
+  "inspector.matting.modelNeeded": "首次使用需下载并校验本地 RVM 模型（{size}，GPL-3.0）。",
+  "inspector.matting.install": "安装本地模型",
+  "inspector.matting.installing": "正在安装… {percent}%",
+  "inspector.matting.localPrivacy": "全程在本机执行，视频不会上传。预览会生成可重用的透明缓存。",
+  "inspector.matting.preview": "生成抠像预览",
+  "inspector.matting.processing": "正在逐帧抠像…",
+  "inspector.matting.apply": "应用到片段",
+  "inspector.matting.applying": "正在应用…",
+  "inspector.matting.cancel": "取消",
+  "inspector.matting.undo": "撤销抠像",
+  "inspector.matting.applied": "已替换为透明抠像素材，原素材仍保留在工程中。",
+  "inspector.matting.previewLabel": "AI 抠像透明预览",
+  "inspector.motionTracking.heading": "运动追踪",
+  "inspector.motionTracking.compatibility": "运动追踪当前支持正向 1x 的普通视频片段。",
+  "inspector.motionTracking.localPrivacy": "在本机分析所选区域，并生成可编辑的位置关键帧。",
+  "inspector.motionTracking.selectRegion": "在预览中框选区域",
+  "inspector.motionTracking.finishRegion": "完成区域选择",
+  "inspector.motionTracking.previewRegionLabel": "运动追踪区域选择",
+  "inspector.motionTracking.subject": "追踪主体",
+  "inspector.motionTracking.x": "区域 X",
+  "inspector.motionTracking.y": "区域 Y",
+  "inspector.motionTracking.width": "区域宽度",
+  "inspector.motionTracking.height": "区域高度",
+  "inspector.motionTracking.startFrame": "起始帧",
+  "inspector.motionTracking.endFrame": "结束帧",
+  "inspector.motionTracking.preview": "分析运动",
+  "inspector.motionTracking.retry": "重试分析",
+  "inspector.motionTracking.processing": "正在追踪…",
+  "inspector.motionTracking.apply": "应用追踪",
+  "inspector.motionTracking.applying": "正在应用…",
+  "inspector.motionTracking.cancel": "取消",
+  "inspector.motionTracking.undo": "撤销追踪",
+  "inspector.motionTracking.result": "最低置信度 {confidence}% · {count} 个关键帧",
+  "inspector.motionTracking.applied": "位置关键帧已写入片段，可继续在关键帧面板中编辑。",
+  "inspector.objectRemoval.heading": "智能擦除",
+  "inspector.objectRemoval.compatibility": "智能擦除当前支持正向 1x 的普通视频片段。",
+  "inspector.objectRemoval.maskNeeded": "先在上方启用并调整一个蒙版，用它框选要擦除的对象。",
+  "inspector.objectRemoval.localPrivacy": "使用本机边界填充模型处理，素材不会上传；原素材始终保留。",
+  "inspector.objectRemoval.startFrame": "起始帧",
+  "inspector.objectRemoval.endFrame": "结束帧",
+  "inspector.objectRemoval.preview": "生成擦除预览",
+  "inspector.objectRemoval.retry": "重试擦除预览",
+  "inspector.objectRemoval.processing": "正在逐帧擦除…",
+  "inspector.objectRemoval.apply": "应用到片段",
+  "inspector.objectRemoval.applying": "正在应用…",
+  "inspector.objectRemoval.cancel": "取消",
+  "inspector.objectRemoval.undo": "撤销智能擦除",
+  "inspector.objectRemoval.applied": "已替换为擦除后的衍生素材；原素材与蒙版可通过撤销恢复。",
+  "inspector.objectRemoval.previewLabel": "智能擦除视频预览",
+  "inspector.colorMatch.heading": "参考画面色彩匹配",
+  "inspector.colorMatch.compatibility": "色彩匹配当前支持正向 1x 的普通图片或视频片段。",
+  "inspector.colorMatch.reference": "参考素材",
+  "inspector.colorMatch.referenceFrame": "参考帧",
+  "inspector.colorMatch.targetFrame": "目标帧",
+  "inspector.colorMatch.noReference": "媒体库中还没有可用的其他图片或视频参考。",
+  "inspector.colorMatch.preview": "分析匹配",
+  "inspector.colorMatch.retry": "重试分析",
+  "inspector.colorMatch.processing": "正在采样色彩…",
+  "inspector.colorMatch.apply": "应用可编辑调色",
+  "inspector.colorMatch.applying": "正在应用…",
+  "inspector.colorMatch.cancel": "取消",
+  "inspector.colorMatch.undo": "撤销色彩匹配",
+  "inspector.colorMatch.delta": "色差 ΔE：{before} → {after}",
+  "inspector.colorMatch.luma": "目标亮度变化：{before} → {after}",
+  "inspector.colorMatch.targetSample": "目标",
+  "inspector.colorMatch.referenceSample": "参考色相（保持目标亮度）",
+  "inspector.colorMatch.applied": "匹配结果已作为普通可编辑调色写入；采样来源和统计已保存在工程中。",
   "inspector.section.levels": "电平",
+  "inspector.section.loudness": "响度归一化",
+  "inspector.loudness.target": "目标响度",
+  "inspector.loudness.ceiling": "真峰值上限",
+  "inspector.loudness.analyzeApply": "分析并应用",
+  "inspector.loudness.analyzing": "正在分析响度…",
+  "inspector.loudness.cancel": "取消分析",
+  "inspector.loudness.reanalyze": "重新分析",
+  "inspector.loudness.reset": "重置响度",
+  "inspector.section.denoise": "音频降噪",
+  "inspector.denoise.mode": "模式",
+  "inspector.denoise.mode.adaptive": "自适应",
+  "inspector.denoise.mode.voice": "人声",
+  "inspector.denoise.strength": "强度",
+  "inspector.denoise.preview": "预览降噪",
+  "inspector.denoise.previewOn": "预览开启",
+  "inspector.denoise.previewOff": "预览关闭",
+  "inspector.denoise.apply": "应用降噪",
+  "inspector.denoise.reapply": "重新应用",
+  "inspector.denoise.processing": "正在分析并准备降噪…",
+  "inspector.denoise.cancel": "取消处理",
+  "inspector.denoise.reset": "重置降噪",
+  "inspector.section.stems": "人声 / 伴奏分离",
+  "inspector.stems.execution": "执行方式",
+  "inspector.stems.local": "本地（推荐）",
+  "inspector.stems.hosted": "托管服务",
+  "inspector.stems.localPrivacy": "完全在本机处理，音频不会上传。首次使用会安装并校验内置模型。",
+  "inspector.stems.hostedPrivacy": "托管模式会上传源音频；必须明确选择服务商、模型并确认上传。",
+  "inspector.stems.provider": "服务商",
+  "inspector.stems.model": "模型",
+  "inspector.stems.confirmUpload": "确认上传源音频",
+  "inspector.stems.processing": "正在分离音轨…",
+  "inspector.stems.separate": "分离人声与伴奏",
+  "inspector.stems.cancel": "取消分离",
+  "inspector.stems.complete": "已将人声和伴奏添加到素材库",
+  "inspector.stems.auditionVocals": "试听人声分轨",
+  "inspector.stems.auditionAccompaniment": "试听伴奏分轨",
+  "inspector.stems.importTracks": "导入为两条对齐音轨",
+  "inspector.stems.undoImport": "撤销音轨导入",
+  "inspector.stems.error.confirm": "使用托管服务前必须确认上传源音频。",
+  "inspector.stems.error.notConfigured": "所选托管服务尚未配置可用的音轨分离适配器。",
   "inspector.section.transform": "变换",
   "inspector.action.resetTransform": "重置变换",
   "inspector.section.playback": "播放",
@@ -266,8 +533,36 @@ const zh: Dict = {
   "inspector.section.flip": "翻转",
   "inspector.section.fade": "淡入淡出",
   "inspector.section.colorGrade": "调色",
+  "inspector.section.lut": "3D LUT",
+  "inspector.action.importLut": "导入…",
+  "inspector.action.removeLut": "移除",
+  "inspector.field.lutFile": "LUT 文件",
+  "inspector.field.lutIntensity": "LUT 强度",
+  "inspector.value.noLut": "未选择",
+  "inspector.section.hslSecondary": "HSL 二级调色",
+  "inspector.action.resetHslSecondary": "重置 HSL 二级调色",
   "inspector.section.chromaKey": "绿幕抠像",
   "inspector.section.mask": "蒙版",
+  "inspector.section.stabilization": "视频防抖",
+  "inspector.section.effects": "效果与滤镜",
+  "inspector.effects.add": "添加效果",
+  "inspector.effects.empty": "尚未添加效果",
+  "inspector.effects.grayscale": "灰度",
+  "inspector.effects.sepia": "棕褐",
+  "inspector.effects.invert": "反相",
+  "inspector.effects.amount": "强度",
+  "inspector.effects.moveUp": "上移效果",
+  "inspector.effects.moveDown": "下移效果",
+  "inspector.effects.remove": "删除效果",
+  "inspector.effects.unknown": "不支持",
+  "inspector.stabilization.analyzeApply": "分析并应用防抖",
+  "inspector.stabilization.analyzing": "正在分析运动…",
+  "inspector.stabilization.cancel": "取消分析",
+  "inspector.stabilization.strength": "防抖强度",
+  "inspector.stabilization.cropMargin": "额外裁切",
+  "inspector.stabilization.samples": "个运动采样",
+  "inspector.stabilization.reanalyze": "重新分析",
+  "inspector.stabilization.reset": "重置防抖",
   "inspector.field.volume": "音量",
   "inspector.field.scale": "缩放",
   "inspector.field.rotation": "旋转",
@@ -316,6 +611,12 @@ const zh: Dict = {
   "inspector.field.gainB": "Gain B",
   "inspector.field.contrast": "对比",
   "inspector.field.saturation": "饱和",
+  "inspector.field.hsl.hueCenter": "色相中心",
+  "inspector.field.hsl.hueWidth": "色相范围",
+  "inspector.field.hsl.feather": "羽化",
+  "inspector.field.hsl.hueShift": "色相偏移",
+  "inspector.field.hsl.saturation": "HSL 饱和度",
+  "inspector.field.hsl.lightness": "HSL 明度",
   "inspector.field.keyColor": "键色",
   "inspector.field.similarity": "阈值",
   "inspector.field.smoothness": "柔化",
@@ -333,7 +634,15 @@ const zh: Dict = {
   "inspector.field.invert": "反相",
   "inspector.mask.circle": "圆形",
   "inspector.mask.linear": "线性",
-  "inspector.mask.polyPending": "多边形 (shader 未接)",
+  "inspector.mask.polyPending": "钢笔 / 多边形",
+  "inspector.mask.addPoint": "添加点",
+  "inspector.mask.deletePoint": "删除点",
+  "inspector.mask.delete": "删除蒙版",
+  "inspector.mask.offsetX": "蒙版偏移 X",
+  "inspector.mask.offsetY": "蒙版偏移 Y",
+  "inspector.mask.scaleX": "蒙版缩放 X",
+  "inspector.mask.scaleY": "蒙版缩放 Y",
+  "inspector.mask.rotation": "蒙版旋转",
   "inspector.interpolation.linear": "线性",
   "inspector.interpolation.hold": "保持",
   "inspector.interpolation.smooth": "平滑",
@@ -357,6 +666,11 @@ const zh: Dict = {
   "inspector.keyframe.next": "跳到下一个关键帧",
   "inspector.keyframe.add": "在播放头处添加关键帧",
   "inspector.keyframe.remove": "移除播放头处的关键帧",
+  "inspector.keyframes.diamondLabel": "{property}关键帧，第 {frame} 帧",
+  "inspector.keyframes.moveFailed": "无法移动关键帧：{error}",
+  "inspector.keyframes.contextMenu": "关键帧菜单",
+  "inspector.keyframes.deleteFailed": "无法删除关键帧：{error}",
+  "inspector.keyframes.interpolationFailed": "无法设置关键帧插值：{error}",
   "inspector.keyframe.outsideClip": "将播放头移入片段内",
   "inspector.textPlaceholder": "输入文本…",
   "inspector.swapMedia": "替换媒体",
@@ -391,8 +705,11 @@ const zh: Dict = {
   "timeline.hide": "隐藏",
   "timeline.syncLock": "同步锁定",
   "timeline.moveTrackUp": "上移轨道",
+  "timeline.trackUpdateFailed": "无法更新轨道：{error}",
   "timeline.moveTrackDown": "下移轨道",
   "timeline.dropHint": "将媒体拖到此处开始",
+  "timeline.compoundBreadcrumb": "复合时间线导航",
+  "timeline.main": "主时间线",
 
   // Clip context menu (right-click)
   "contextMenu.copy": "复制",
@@ -412,6 +729,10 @@ const zh: Dict = {
   "contextMenu.saveRangeAsMedia": "将范围另存为媒体",
   "contextMenu.clearRange": "清除范围",
   "contextMenu.extractAudio": "提取音频",
+  "contextMenu.createCompound": "创建复合片段",
+  "contextMenu.openCompound": "打开复合时间线",
+  "contextMenu.dissolveCompound": "展开复合片段",
+  "compound.defaultName": "复合片段",
   "swapMedia.noCandidates": "没有同类型素材可替换",
 
   // Preview
@@ -431,9 +752,10 @@ const zh: Dict = {
   "preview.captureFrameSaved": "当前帧已存入素材库",
   "preview.captureFrameUnavailable": "当前环境无法生成合成帧",
   "preview.captureFrameFailed": "截帧失败",
+  "preview.scrubBar": "预览播放头",
   "preview.unsupportedPlayback": "当前时间线无法完整预览",
   "preview.unsupportedPlayback.lottie": "Lottie 动画暂不支持",
-  "preview.unsupportedPlayback.enabled-effect": "已启用的效果暂不支持",
+  "preview.unsupportedPlayback.unknown-effect": "项目包含未知效果",
   "preview.unsupportedPlayback.polygon-mask": "多边形蒙版暂不支持",
   "preview.unsupportedPlayback.mask-overflow": "每个片段最多支持 4 个蒙版",
   "preview.unsupportedPlayback.composited-reverse": "合成内容暂不支持倒放",
@@ -458,6 +780,28 @@ const zh: Dict = {
   "agent.openSettings": "打开设置",
   "agent.toolArgs": "参数",
   "agent.toolResult": "结果",
+  "agent.modes": "Agent 功能",
+  "agent.chatMode": "对话",
+  "agent.motionMode": "动效",
+  "motion.heading": "Motion 动效",
+  "motion.description": "使用本地模板生成视频动效，并在播放头位置加入时间线。",
+  "motion.desktopOnly": "Motion 动效仅在桌面版中可用。",
+  "motion.checking": "正在检查本地渲染能力…",
+  "motion.unavailable": "未检测到可用的 Chrome、FFmpeg 或 FFprobe，暂时无法渲染动效。",
+  "motion.template": "模板",
+  "motion.titleCard": "标题卡片",
+  "motion.lowerThird": "玻璃字幕条",
+  "motion.title": "标题",
+  "motion.subtitle": "副标题",
+  "motion.duration": "时长（秒）",
+  "motion.accent": "强调色",
+  "motion.addAtPlayhead": "添加到播放头",
+  "motion.cancel": "取消渲染",
+  "motion.phaseValidating": "正在验证动效…",
+  "motion.phaseRendering": "正在使用本地浏览器渲染帧…",
+  "motion.phaseEncoding": "正在编码 MP4…",
+  "motion.phaseCommitting": "正在保存到项目…",
+  "motion.phaseComplete": "动效已添加到时间线。",
 
   // Home
   "home.welcome": "欢迎使用 OpenTake",
@@ -468,6 +812,7 @@ const zh: Dict = {
   "home.recentEmpty": "还没有最近的项目。新建一个开始吧。",
   "home.untitled": "未命名",
   "home.remove": "从最近中移除",
+  "home.creating": "正在创建…",
   "home.opening": "正在打开…",
 
   // Settings
@@ -480,6 +825,8 @@ const zh: Dict = {
   "settings.section.about": "关于",
   "settings.language": "语言",
   "settings.languageDesc": "界面显示语言。",
+  "settings.proxyPlayback": "优先使用代理媒体播放",
+  "settings.proxyPlaybackDesc": "预览使用已生成的低分辨率副本；导出始终使用原始素材。",
   "settings.theme": "主题",
   "settings.themeDesc": "应用配色方案。",
   "settings.theme.dark": "深色",
@@ -503,6 +850,17 @@ const zh: Dict = {
   "settings.byokSaved": "密钥已安全存储在系统钥匙串中。",
   "settings.byokDelete": "删除密钥",
   "settings.byokSaveFailed": "保存失败：{error}",
+  "settings.codexDesc":
+    "使用官方 Codex CLI 的 ChatGPT 登录直接驱动 OpenTake Agent。OpenTake 不读取、不复制也不保存你的 ChatGPT 凭据。",
+  "settings.codexChecking": "正在检查官方 Codex 登录状态…",
+  "settings.codexUnavailable": "未找到官方 Codex CLI。请先安装 Codex。",
+  "settings.codexWaiting": "请在浏览器中完成 ChatGPT 登录…",
+  "settings.codexSignedIn": "已通过官方 Codex 登录：{method}",
+  "settings.codexSignedOut": "Codex 尚未登录。",
+  "settings.codexLogin": "使用 ChatGPT 登录",
+  "settings.codexCancel": "取消登录",
+  "settings.codexLogout": "退出 Codex 登录",
+  "settings.codexActionFailed": "Codex 操作失败：{error}",
   "settings.aboutVersion": "版本",
   "settings.aboutLicense": "许可",
   "settings.aboutDesc": "OpenTake 是 Palmier Pro 的开源跨平台分支。",
@@ -601,15 +959,31 @@ const zh: Dict = {
   "home.signIn": "登录",
   "home.signOut": "退出",
   "home.fileMissing": "文件缺失",
+  "home.projectActions": "项目操作",
+  "home.revealInFinder": "在 Finder 中显示",
+  "home.removeFromRecents": "从最近项目中移除",
+  "home.moveToTrash": "移到废纸篓",
+  "home.confirmTrashTitle": "确认移到废纸篓",
+  "home.confirmTrashBody": "将“{name}”移到系统废纸篓？操作失败时项目和最近记录都会保留。",
+  "home.revealing": "正在显示…",
+  "home.removing": "正在移除…",
+  "home.trashing": "正在移动…",
+  "home.revealFailed": "无法在 Finder 中显示：{error}",
+  "home.removeFailed": "无法从最近项目中移除：{error}",
+  "home.trashFailed": "无法移到废纸篓：{error}",
   "home.samples": "示例项目",
   "home.sampleDemo": "产品演示",
   "home.sampleTutorial": "快速教程",
   "home.sampleTemplate": "模板项目",
   "home.sampleComingSoon": "示例项目即将上线",
+  "home.sampleFailed": "无法打开示例项目：{error}",
+  "home.tutorialStarted": "教程项目已打开。按照时间线中的示例开始编辑。",
   "home.newInVersion": "v{version} 新功能",
   "home.welcomeOverlayTitle": "欢迎使用 OpenTake",
   "home.welcomeOverlayBody": "点击「新建」开始你的第一个项目。",
   "home.welcomeOverlayStart": "开始",
+  "home.updateOverlayBody": "AI 编辑、音乐工作流与交叉溶解转场现已接入可撤销的工程编辑链路。",
+  "home.updateOverlayDismiss": "了解",
 
   // Home relative time
   "home.relative.today": "今天",
@@ -627,6 +1001,7 @@ const zh: Dict = {
   "edit.cut": "剪切 (⌘X)",
   "edit.paste": "粘贴 (⌘V)",
   "edit.clipboardEmpty": "剪贴板为空",
+  "edit.pasteFailed": "粘贴失败：{error}",
 
   // Global asset library (#56)
   "library.title": "素材库",
@@ -664,7 +1039,16 @@ const en: Dict = {
     "This project contains fields this version cannot safely save. You can still inspect the project, but editing and saving are disabled.",
   "compatibility.blockerCount.one": "{count} compatibility issue",
   "compatibility.blockerCount.many": "{count} compatibility issues",
+  "project.createFailed": "Create failed: {error}",
+  "project.openFailed": "Open failed: {error}",
   "project.saveFailed": "Save failed: {error}",
+  "projectSettingsMismatch.title": "Media and project settings differ",
+  "projectSettingsMismatch.description":
+    "The timeline is still empty. Keep the current project settings or match the first video asset.",
+  "projectSettingsMismatch.current": "Current project",
+  "projectSettingsMismatch.source": "Video asset",
+  "projectSettingsMismatch.keep": "Keep current settings",
+  "projectSettingsMismatch.match": "Match video",
 
   "title.toggleAgent": "Toggle Agent Panel",
   "title.export": "Export",
@@ -751,6 +1135,42 @@ const en: Dict = {
   "view.agentPanel": "Agent Panel",
   "view.mediaPanel": "Media Panel",
   "view.inspector": "Inspector",
+  "view.maximizeFocused": "Maximize Focused Panel",
+  "view.enterFullScreen": "Enter Full Screen",
+  "view.fullscreenFailed": "Could not toggle fullscreen. Try again.",
+  "layout.panel.agent": "Agent panel",
+  "layout.panel.media": "Media panel",
+  "layout.panel.preview": "Preview panel",
+  "layout.panel.inspector": "Inspector panel",
+  "layout.panel.timeline": "Timeline panel",
+  "layout.resizePanels": "Resize panels",
+  "layout.positionPixels": "{value} pixels",
+  "menu.about": "About OpenTake",
+  "menu.checkUpdates": "Check for Updates… (Unavailable in Beta)",
+  "menu.quit": "Quit OpenTake",
+  "menu.file": "File",
+  "menu.new": "New",
+  "menu.open": "Open…",
+  "menu.save": "Save",
+  "menu.saveAs": "Save As…",
+  "menu.importMedia": "Import Media…",
+  "menu.export": "Export…",
+  "menu.edit": "Edit",
+  "menu.undo": "Undo",
+  "menu.redo": "Redo",
+  "menu.cut": "Cut",
+  "menu.copy": "Copy",
+  "menu.paste": "Paste",
+  "menu.selectAll": "Select All",
+  "menu.split": "Split at Playhead",
+  "menu.trimStart": "Trim Start to Playhead",
+  "menu.trimEnd": "Trim End to Playhead",
+  "menu.delete": "Delete",
+  "menu.help": "Help",
+  "menu.tutorial": "Tutorial (Unavailable in Beta)",
+  "menu.shortcuts": "Keyboard Shortcuts",
+  "menu.feedback": "Send Feedback… (Unavailable in Beta)",
+  "menu.installFailed": "Could not install the application menu. Restart OpenTake.",
 
   "media.tab.media": "Media",
   "media.tab.captions": "Captions",
@@ -803,6 +1223,28 @@ const en: Dict = {
   "media.sound.add": "Add to project",
   "media.sound.added": "Added: {name}",
   "media.sound.failed": "Add failed",
+  "media.music.import": "Import music",
+  "media.music.generate": "Generate music with AI",
+  "media.music.generateDraft": "Create music for the current project. First ask me for style, mood, duration, and whether it should be instrumental; show the model and cost and wait for my confirmation before generating.",
+  "media.music.projectSection": "Project music",
+  "media.music.librarySection": "Saved music",
+  "media.music.place": "Place on timeline",
+  "media.music.importAndPlace": "Import and place",
+  "media.music.placed": "Placed on timeline: {name}",
+  "media.music.placeFailed": "Placement failed: {error}",
+  "media.music.importFailed": "Music could not be imported",
+  "media.music.importRefreshFailed": "The music was imported, but the project media list has not refreshed",
+  "media.music.empty": "No music here yet",
+  "media.transition.selectCut": "Select either of two adjacent visual clips on the timeline to edit the transition at their cut.",
+  "media.transition.crossDissolve": "Cross dissolve",
+  "media.transition.crossDissolveDescription": "Blend the outgoing and incoming pictures smoothly before the cut.",
+  "media.transition.duration": "Duration: {frames} frames ({seconds} seconds)",
+  "media.transition.durationLabel": "Transition duration",
+  "media.transition.apply": "Apply transition",
+  "media.transition.applying": "Applying…",
+  "media.transition.remove": "Remove",
+  "media.transition.applied": "Transition applied through an undoable command.",
+  "media.transition.removed": "Transition removed.",
   "media.offline": "Media Offline",
   "media.relink": "Relink",
 
@@ -857,6 +1299,76 @@ const en: Dict = {
   "captions.modelReady": "Model ready.",
   "captions.desktopOnly": "Caption generation requires the desktop app (whisper).",
   "captions.failed": "Caption generation failed: {error}",
+  "captions.translation": "Caption Translation",
+  "captions.translation.scope": "Translate {count} captions (selected captions take priority)",
+  "captions.translation.sourceLocale": "Source locale (for example auto or zh-CN)",
+  "captions.translation.targetLocale": "Target locale (for example en-US)",
+  "captions.translation.provider": "Translation provider",
+  "captions.translation.costConsent": "I agree to send caption text to the selected provider and accept possible API charges.",
+  "captions.translation.accept": "Accept translation: {text}",
+  "captions.translation.translate": "Translate & Review",
+  "captions.translation.translating": "Translating…",
+  "captions.translation.retry": "Retry Translation",
+  "captions.translation.apply": "Apply {count}",
+  "captions.translation.applying": "Applying…",
+  "captions.translation.cancel": "Cancel",
+  "captions.translation.undo": "Undo Translation",
+  "captions.translation.applied": "Translation applied; caption IDs and frame ranges are unchanged.",
+  "scriptVideo.description": "Persist a reviewable plan of script, selected media, optional narration, and transitions before assembling the timeline atomically.",
+  "scriptVideo.segment": "Segment {number}",
+  "scriptVideo.remove": "Remove",
+  "scriptVideo.script": "Segment {number} script",
+  "scriptVideo.scriptPlaceholder": "Describe this scene or paste its script…",
+  "scriptVideo.visual": "Visual media",
+  "scriptVideo.chooseVisual": "Choose visual media",
+  "scriptVideo.narration": "Narration media",
+  "scriptVideo.noNarration": "No narration",
+  "scriptVideo.duration": "Duration (frames)",
+  "scriptVideo.transition": "Cross dissolve into next segment",
+  "scriptVideo.addSegment": "Add Segment",
+  "scriptVideo.planSummary": "Plan persisted: {count} segments, frames {start}–{end}",
+  "scriptVideo.review": "Save & Review Plan",
+  "scriptVideo.planning": "Validating & saving plan…",
+  "scriptVideo.retry": "Retry Plan",
+  "scriptVideo.apply": "Start Assembly",
+  "scriptVideo.applying": "Assembling tracks…",
+  "scriptVideo.cancel": "Cancel",
+  "scriptVideo.undo": "Undo Assembly",
+  "scriptVideo.applied": "Assembly applied in one undo step.",
+  "scriptVideo.noVisuals": "Import image, video, or Lottie media first.",
+  "smartPack.workflows": "Smart workflows",
+  "smartPack.script": "Script Video",
+  "smartPack.avatar": "Avatar",
+  "smartPack.voice": "Voice Clone",
+  "avatar.description": "Generate lip-synchronized video from a consented portrait and narration through fal, then import it in one undoable timeline step.",
+  "avatar.portrait": "Portrait image",
+  "avatar.audio": "Narration audio",
+  "avatar.startFrame": "Start frame",
+  "avatar.consent": "I confirm explicit authorization from the portrait subject and voice rights holder, and record this consent.",
+  "avatar.cost": "I reviewed and authorize this paid generation.",
+  "avatar.preview": "Avatar result preview",
+  "avatar.generate": "Generate & Import Avatar",
+  "avatar.progress": "Uploading, generating & validating…",
+  "avatar.undo": "Undo Avatar",
+  "avatar.ready": "Avatar validated and imported ({frames} frames).",
+  "voice.description": "Enroll consented voice audio with ElevenLabs, generate auditable audio for audition, or permanently revoke the provider voice.",
+  "voice.reference": "Consented reference audio",
+  "voice.name": "Voice name",
+  "voice.consent": "I confirm explicit authorization from the voice owner and record this consent.",
+  "voice.cost": "I reviewed and authorize enrollment/generation costs.",
+  "voice.enroll": "Enroll Voice Model",
+  "voice.model": "Enrolled voice",
+  "voice.chooseModel": "Choose a voice model",
+  "voice.prompt": "Text to speak",
+  "voice.audition": "Cloned voice audition",
+  "voice.generate": "Generate, Audition & Import",
+  "voice.progress": "Provider processing…",
+  "voice.undo": "Undo Generated Audio",
+  "voice.revoke": "Permanently Revoke Voice",
+  "voice.status.enroll": "Voice model enrolled with recorded provenance.",
+  "voice.status.generate": "Cloned voice validated, imported, and ready to audition.",
+  "voice.status.revoke": "Voice revoked at the provider and in this project; it cannot generate again.",
+  "common.retry": "Retry",
 
   // Inspector
   "inspector.title": "Inspector",
@@ -870,6 +1382,13 @@ const en: Dict = {
   "inspector.source.duration": "Duration",
   "inspector.source.size": "Size",
   "inspector.source.path": "Path",
+  "inspector.source.hdr": "HDR Color",
+  "inspector.source.hdrDelivery": "{transfer} · preview and export map to BT.709 SDR",
+  "inspector.source.proxy": "Proxy Media",
+  "inspector.source.proxyCreate": "Create 720p Proxy",
+  "inspector.source.proxyCreating": "Creating {progress}%",
+  "inspector.source.proxyReady": "Ready · {width} × {height}",
+  "inspector.source.proxyRemove": "Remove Proxy",
   "inspector.source.aiBadge": "AI",
   "inspector.source.references": "References",
   "inspector.source.generated": "Generated",
@@ -887,7 +1406,130 @@ const en: Dict = {
   "inspector.tab.video": "Video",
   "inspector.tab.audio": "Audio",
   "inspector.tab.aiEdit": "AI Edit",
+  "inspector.aiEdit.heading": "AI edit suggestions",
+  "inspector.aiEdit.intent": "How should this clip change?",
+  "inspector.aiEdit.defaultIntent": "Improve this clip's pacing and polish",
+  "inspector.aiEdit.placeholder": "For example: make the opening and ending gentler",
+  "inspector.aiEdit.generate": "Generate suggestion",
+  "inspector.aiEdit.generating": "Analyzing…",
+  "inspector.aiEdit.cancel": "Cancel",
+  "inspector.aiEdit.apply": "Apply suggestion",
+  "inspector.aiEdit.applying": "Applying…",
+  "inspector.aiEdit.reject": "Reject suggestion",
+  "inspector.aiEdit.undo": "Undo this edit",
+  "inspector.aiEdit.applied": "Suggestion applied through an undoable edit command.",
+  "inspector.aiEdit.noSuggestion": "No applicable suggestion was generated.",
+  "inspector.aiEdit.unavailable": "This media is unavailable, so an edit cannot be suggested.",
+  "inspector.matting.heading": "AI portrait matting",
+  "inspector.matting.compatibility": "Matting currently supports ordinary forward 1x video clips.",
+  "inspector.matting.modelNeeded": "First use downloads and verifies the local RVM model ({size}, GPL-3.0).",
+  "inspector.matting.install": "Install local model",
+  "inspector.matting.installing": "Installing… {percent}%",
+  "inspector.matting.localPrivacy": "Runs entirely on this device; video is never uploaded. Preview creates a reusable transparent cache.",
+  "inspector.matting.preview": "Generate matte preview",
+  "inspector.matting.processing": "Matting frames…",
+  "inspector.matting.apply": "Apply to clip",
+  "inspector.matting.applying": "Applying…",
+  "inspector.matting.cancel": "Cancel",
+  "inspector.matting.undo": "Undo matte",
+  "inspector.matting.applied": "The clip now uses the transparent matte; its original media remains in the project.",
+  "inspector.matting.previewLabel": "AI matte transparency preview",
+  "inspector.motionTracking.heading": "Motion tracking",
+  "inspector.motionTracking.compatibility": "Motion tracking currently supports ordinary forward 1x video clips.",
+  "inspector.motionTracking.localPrivacy": "Analyzes the selected region on this device and creates editable position keyframes.",
+  "inspector.motionTracking.selectRegion": "Select region in preview",
+  "inspector.motionTracking.finishRegion": "Finish region selection",
+  "inspector.motionTracking.previewRegionLabel": "Motion tracking region selection",
+  "inspector.motionTracking.subject": "Tracked subject",
+  "inspector.motionTracking.x": "Region X",
+  "inspector.motionTracking.y": "Region Y",
+  "inspector.motionTracking.width": "Region width",
+  "inspector.motionTracking.height": "Region height",
+  "inspector.motionTracking.startFrame": "Start frame",
+  "inspector.motionTracking.endFrame": "End frame",
+  "inspector.motionTracking.preview": "Analyze motion",
+  "inspector.motionTracking.retry": "Retry analysis",
+  "inspector.motionTracking.processing": "Tracking motion…",
+  "inspector.motionTracking.apply": "Apply tracking",
+  "inspector.motionTracking.applying": "Applying…",
+  "inspector.motionTracking.cancel": "Cancel",
+  "inspector.motionTracking.undo": "Undo tracking",
+  "inspector.motionTracking.result": "Minimum confidence {confidence}% · {count} keyframes",
+  "inspector.motionTracking.applied": "Position keyframes are saved on the clip and remain editable in the keyframe panel.",
+  "inspector.objectRemoval.heading": "Object removal",
+  "inspector.objectRemoval.compatibility": "Object removal currently supports ordinary forward 1x video clips.",
+  "inspector.objectRemoval.maskNeeded": "Enable and adjust a mask above to select the object to remove.",
+  "inspector.objectRemoval.localPrivacy": "Uses the on-device boundary-fill model; media is never uploaded and the original is retained.",
+  "inspector.objectRemoval.startFrame": "Start frame",
+  "inspector.objectRemoval.endFrame": "End frame",
+  "inspector.objectRemoval.preview": "Generate removal preview",
+  "inspector.objectRemoval.retry": "Retry removal preview",
+  "inspector.objectRemoval.processing": "Removing object frame by frame…",
+  "inspector.objectRemoval.apply": "Apply to clip",
+  "inspector.objectRemoval.applying": "Applying…",
+  "inspector.objectRemoval.cancel": "Cancel",
+  "inspector.objectRemoval.undo": "Undo object removal",
+  "inspector.objectRemoval.applied": "The clip now uses the cleaned derivative; undo restores its original media and mask.",
+  "inspector.objectRemoval.previewLabel": "Object-removal video preview",
+  "inspector.colorMatch.heading": "Reference color match",
+  "inspector.colorMatch.compatibility": "Color match currently supports ordinary forward 1x image or video clips.",
+  "inspector.colorMatch.reference": "Reference media",
+  "inspector.colorMatch.referenceFrame": "Reference frame",
+  "inspector.colorMatch.targetFrame": "Target frame",
+  "inspector.colorMatch.noReference": "No other image or video is available in the media library.",
+  "inspector.colorMatch.preview": "Analyze match",
+  "inspector.colorMatch.retry": "Retry analysis",
+  "inspector.colorMatch.processing": "Sampling color…",
+  "inspector.colorMatch.apply": "Apply editable grade",
+  "inspector.colorMatch.applying": "Applying…",
+  "inspector.colorMatch.cancel": "Cancel",
+  "inspector.colorMatch.undo": "Undo color match",
+  "inspector.colorMatch.delta": "Color difference ΔE: {before} → {after}",
+  "inspector.colorMatch.luma": "Target luma: {before} → {after}",
+  "inspector.colorMatch.targetSample": "Target",
+  "inspector.colorMatch.referenceSample": "Reference hue (target luma)",
+  "inspector.colorMatch.applied": "The match is now an ordinary editable grade; its samples and measurements are saved in the project.",
   "inspector.section.levels": "Levels",
+  "inspector.section.loudness": "Loudness normalization",
+  "inspector.loudness.target": "Target loudness",
+  "inspector.loudness.ceiling": "True-peak ceiling",
+  "inspector.loudness.analyzeApply": "Analyze and apply",
+  "inspector.loudness.analyzing": "Analyzing loudness…",
+  "inspector.loudness.cancel": "Cancel analysis",
+  "inspector.loudness.reanalyze": "Analyze again",
+  "inspector.loudness.reset": "Reset loudness",
+  "inspector.section.denoise": "Audio denoise",
+  "inspector.denoise.mode": "Mode",
+  "inspector.denoise.mode.adaptive": "Adaptive",
+  "inspector.denoise.mode.voice": "Voice",
+  "inspector.denoise.strength": "Strength",
+  "inspector.denoise.preview": "Preview denoise",
+  "inspector.denoise.previewOn": "Preview on",
+  "inspector.denoise.previewOff": "Preview off",
+  "inspector.denoise.apply": "Apply denoise",
+  "inspector.denoise.reapply": "Apply again",
+  "inspector.denoise.processing": "Analyzing and preparing denoise…",
+  "inspector.denoise.cancel": "Cancel processing",
+  "inspector.denoise.reset": "Reset denoise",
+  "inspector.section.stems": "Vocals / accompaniment",
+  "inspector.stems.execution": "Execution",
+  "inspector.stems.local": "Local (recommended)",
+  "inspector.stems.hosted": "Hosted provider",
+  "inspector.stems.localPrivacy": "Runs entirely on this device; audio is never uploaded. The bundled model is installed and integrity-checked on first use.",
+  "inspector.stems.hostedPrivacy": "Hosted mode uploads the source audio. You must explicitly choose a provider/model and confirm the upload.",
+  "inspector.stems.provider": "Provider",
+  "inspector.stems.model": "Model",
+  "inspector.stems.confirmUpload": "Confirm source-audio upload",
+  "inspector.stems.processing": "Separating stems…",
+  "inspector.stems.separate": "Separate vocals and accompaniment",
+  "inspector.stems.cancel": "Cancel separation",
+  "inspector.stems.complete": "Vocals and accompaniment added to the media library",
+  "inspector.stems.auditionVocals": "Audition vocals stem",
+  "inspector.stems.auditionAccompaniment": "Audition accompaniment stem",
+  "inspector.stems.importTracks": "Import as two aligned tracks",
+  "inspector.stems.undoImport": "Undo track import",
+  "inspector.stems.error.confirm": "Confirm source-audio upload before using a hosted provider.",
+  "inspector.stems.error.notConfigured": "The selected hosted provider has no configured stem-separation adapter.",
   "inspector.section.transform": "Transform",
   "inspector.action.resetTransform": "Reset transform",
   "inspector.section.playback": "Playback",
@@ -898,8 +1540,36 @@ const en: Dict = {
   "inspector.section.flip": "Flip",
   "inspector.section.fade": "Fade",
   "inspector.section.colorGrade": "Color Grade",
+  "inspector.section.lut": "3D LUT",
+  "inspector.action.importLut": "Import…",
+  "inspector.action.removeLut": "Remove",
+  "inspector.field.lutFile": "LUT file",
+  "inspector.field.lutIntensity": "LUT intensity",
+  "inspector.value.noLut": "None",
+  "inspector.section.hslSecondary": "HSL Secondary",
+  "inspector.action.resetHslSecondary": "Reset HSL secondary",
   "inspector.section.chromaKey": "Chroma Key",
   "inspector.section.mask": "Mask",
+  "inspector.section.stabilization": "Stabilization",
+  "inspector.section.effects": "Effects & Filters",
+  "inspector.effects.add": "Add effect",
+  "inspector.effects.empty": "No effects added",
+  "inspector.effects.grayscale": "Grayscale",
+  "inspector.effects.sepia": "Sepia",
+  "inspector.effects.invert": "Invert",
+  "inspector.effects.amount": "Amount",
+  "inspector.effects.moveUp": "Move effect up",
+  "inspector.effects.moveDown": "Move effect down",
+  "inspector.effects.remove": "Remove effect",
+  "inspector.effects.unknown": "unsupported",
+  "inspector.stabilization.analyzeApply": "Analyze and apply",
+  "inspector.stabilization.analyzing": "Analyzing motion…",
+  "inspector.stabilization.cancel": "Cancel analysis",
+  "inspector.stabilization.strength": "Strength",
+  "inspector.stabilization.cropMargin": "Extra crop",
+  "inspector.stabilization.samples": "motion samples",
+  "inspector.stabilization.reanalyze": "Analyze again",
+  "inspector.stabilization.reset": "Reset stabilization",
   "inspector.field.volume": "Volume",
   "inspector.field.scale": "Scale",
   "inspector.field.rotation": "Rotation",
@@ -948,6 +1618,12 @@ const en: Dict = {
   "inspector.field.gainB": "Gain B",
   "inspector.field.contrast": "Contrast",
   "inspector.field.saturation": "Saturation",
+  "inspector.field.hsl.hueCenter": "Hue Center",
+  "inspector.field.hsl.hueWidth": "Hue Range",
+  "inspector.field.hsl.feather": "Feather",
+  "inspector.field.hsl.hueShift": "Hue Shift",
+  "inspector.field.hsl.saturation": "HSL Saturation",
+  "inspector.field.hsl.lightness": "HSL Lightness",
   "inspector.field.keyColor": "Key Color",
   "inspector.field.similarity": "Threshold",
   "inspector.field.smoothness": "Softness",
@@ -965,7 +1641,15 @@ const en: Dict = {
   "inspector.field.invert": "Invert",
   "inspector.mask.circle": "Circle",
   "inspector.mask.linear": "Linear",
-  "inspector.mask.polyPending": "Polygon (shader pending)",
+  "inspector.mask.polyPending": "Pen / Polygon",
+  "inspector.mask.addPoint": "Add point",
+  "inspector.mask.deletePoint": "Delete point",
+  "inspector.mask.delete": "Delete mask",
+  "inspector.mask.offsetX": "Mask offset X",
+  "inspector.mask.offsetY": "Mask offset Y",
+  "inspector.mask.scaleX": "Mask scale X",
+  "inspector.mask.scaleY": "Mask scale Y",
+  "inspector.mask.rotation": "Mask rotation",
   "inspector.interpolation.linear": "Linear",
   "inspector.interpolation.hold": "Hold",
   "inspector.interpolation.smooth": "Smooth",
@@ -989,6 +1673,11 @@ const en: Dict = {
   "inspector.keyframe.next": "Go to next keyframe",
   "inspector.keyframe.add": "Add keyframe at playhead",
   "inspector.keyframe.remove": "Remove keyframe at playhead",
+  "inspector.keyframes.diamondLabel": "{property} keyframe at frame {frame}",
+  "inspector.keyframes.moveFailed": "Could not move keyframe: {error}",
+  "inspector.keyframes.contextMenu": "Keyframe menu",
+  "inspector.keyframes.deleteFailed": "Could not delete keyframe: {error}",
+  "inspector.keyframes.interpolationFailed": "Could not set keyframe interpolation: {error}",
   "inspector.keyframe.outsideClip": "Move playhead inside the clip",
   "inspector.textPlaceholder": "Enter text…",
   "inspector.swapMedia": "Swap Media",
@@ -1021,8 +1710,11 @@ const en: Dict = {
   "timeline.hide": "Hide",
   "timeline.syncLock": "Sync lock",
   "timeline.moveTrackUp": "Move Track Up",
+  "timeline.trackUpdateFailed": "Could not update track: {error}",
   "timeline.moveTrackDown": "Move Track Down",
   "timeline.dropHint": "Drop media here to start",
+  "timeline.compoundBreadcrumb": "Compound timeline breadcrumb",
+  "timeline.main": "Main timeline",
 
   // Clip context menu (right-click)
   "contextMenu.copy": "Copy",
@@ -1042,6 +1734,10 @@ const en: Dict = {
   "contextMenu.saveRangeAsMedia": "Save Range as Media",
   "contextMenu.clearRange": "Clear Range",
   "contextMenu.extractAudio": "Extract Audio",
+  "contextMenu.createCompound": "Create Compound Clip",
+  "contextMenu.openCompound": "Open Compound Timeline",
+  "contextMenu.dissolveCompound": "Dissolve Compound Clip",
+  "compound.defaultName": "Compound Clip",
   "swapMedia.noCandidates": "No compatible media to swap",
 
   "preview.fit": "Fit",
@@ -1060,9 +1756,10 @@ const en: Dict = {
   "preview.captureFrameSaved": "Frame added to media",
   "preview.captureFrameUnavailable": "Composite frame unavailable",
   "preview.captureFrameFailed": "Capture frame failed",
+  "preview.scrubBar": "Preview playhead",
   "preview.unsupportedPlayback": "This timeline cannot be previewed completely",
   "preview.unsupportedPlayback.lottie": "Lottie animation is not supported yet",
-  "preview.unsupportedPlayback.enabled-effect": "Enabled effects are not supported yet",
+  "preview.unsupportedPlayback.unknown-effect": "The project contains an unknown effect",
   "preview.unsupportedPlayback.polygon-mask": "Polygon masks are not supported yet",
   "preview.unsupportedPlayback.mask-overflow": "A clip can use at most four masks",
   "preview.unsupportedPlayback.composited-reverse": "Composited content cannot be reversed yet",
@@ -1086,6 +1783,28 @@ const en: Dict = {
   "agent.openSettings": "Open Settings",
   "agent.toolArgs": "Arguments",
   "agent.toolResult": "Result",
+  "agent.modes": "Agent modes",
+  "agent.chatMode": "Chat",
+  "agent.motionMode": "Motion",
+  "motion.heading": "Motion graphics",
+  "motion.description": "Render a local template and add it to the timeline at the playhead.",
+  "motion.desktopOnly": "Motion graphics are available only in the desktop app.",
+  "motion.checking": "Checking the local renderer…",
+  "motion.unavailable": "Chrome, FFmpeg, or FFprobe is unavailable, so motion rendering cannot start.",
+  "motion.template": "Template",
+  "motion.titleCard": "Title card",
+  "motion.lowerThird": "Glass lower third",
+  "motion.title": "Title",
+  "motion.subtitle": "Subtitle",
+  "motion.duration": "Duration (seconds)",
+  "motion.accent": "Accent",
+  "motion.addAtPlayhead": "Add at playhead",
+  "motion.cancel": "Cancel render",
+  "motion.phaseValidating": "Validating motion graphic…",
+  "motion.phaseRendering": "Rendering frames in the local browser…",
+  "motion.phaseEncoding": "Encoding MP4…",
+  "motion.phaseCommitting": "Saving to the project…",
+  "motion.phaseComplete": "Motion graphic added to the timeline.",
 
   "home.welcome": "Welcome to OpenTake",
   "home.newProject": "New Project",
@@ -1095,6 +1814,7 @@ const en: Dict = {
   "home.recentEmpty": "No recent projects yet. Create one to get started.",
   "home.untitled": "Untitled",
   "home.remove": "Remove from Recents",
+  "home.creating": "Creating…",
   "home.opening": "Opening…",
 
   "settings.title": "Settings",
@@ -1106,6 +1826,8 @@ const en: Dict = {
   "settings.section.about": "About",
   "settings.language": "Language",
   "settings.languageDesc": "Interface display language.",
+  "settings.proxyPlayback": "Prefer proxy media for playback",
+  "settings.proxyPlaybackDesc": "Preview uses generated low-resolution copies; export always uses originals.",
   "settings.theme": "Theme",
   "settings.themeDesc": "Application color scheme.",
   "settings.theme.dark": "Dark",
@@ -1129,6 +1851,17 @@ const en: Dict = {
   "settings.byokSaved": "Key stored securely in your system keychain.",
   "settings.byokDelete": "Remove key",
   "settings.byokSaveFailed": "Save failed: {error}",
+  "settings.codexDesc":
+    "Use the official Codex CLI's ChatGPT sign-in to power the OpenTake Agent. OpenTake never reads, copies, or stores your ChatGPT credentials.",
+  "settings.codexChecking": "Checking the official Codex login…",
+  "settings.codexUnavailable": "Official Codex CLI was not found. Install Codex first.",
+  "settings.codexWaiting": "Complete the ChatGPT sign-in in your browser…",
+  "settings.codexSignedIn": "Signed in through official Codex: {method}",
+  "settings.codexSignedOut": "Codex is not signed in.",
+  "settings.codexLogin": "Sign in with ChatGPT",
+  "settings.codexCancel": "Cancel sign-in",
+  "settings.codexLogout": "Sign out of Codex",
+  "settings.codexActionFailed": "Codex action failed: {error}",
   "settings.aboutVersion": "Version",
   "settings.aboutLicense": "License",
   "settings.aboutDesc": "OpenTake is the open-source, cross-platform fork of Palmier Pro.",
@@ -1227,15 +1960,31 @@ const en: Dict = {
   "home.signIn": "Sign in",
   "home.signOut": "Sign out",
   "home.fileMissing": "File missing",
+  "home.projectActions": "Project actions",
+  "home.revealInFinder": "Reveal in file manager",
+  "home.removeFromRecents": "Remove from recents",
+  "home.moveToTrash": "Move to trash",
+  "home.confirmTrashTitle": "Confirm move to trash",
+  "home.confirmTrashBody": "Move “{name}” to the system trash? If it fails, the project and recent entry are kept.",
+  "home.revealing": "Revealing…",
+  "home.removing": "Removing…",
+  "home.trashing": "Moving…",
+  "home.revealFailed": "Could not reveal the project: {error}",
+  "home.removeFailed": "Could not remove the recent project: {error}",
+  "home.trashFailed": "Could not move the project to trash: {error}",
   "home.samples": "Sample projects",
   "home.sampleDemo": "Product demo",
   "home.sampleTutorial": "Quick tutorial",
   "home.sampleTemplate": "Template project",
   "home.sampleComingSoon": "Sample projects coming soon",
+  "home.sampleFailed": "Could not open the sample project: {error}",
+  "home.tutorialStarted": "Tutorial project opened. Follow the examples in the timeline to begin editing.",
   "home.newInVersion": "New in v{version}",
   "home.welcomeOverlayTitle": "Welcome to OpenTake",
   "home.welcomeOverlayBody": "Click \"New Project\" to start your first project.",
   "home.welcomeOverlayStart": "Get started",
+  "home.updateOverlayBody": "AI Edit, music workflows, and cross-dissolve transitions now use the undoable project editing pipeline.",
+  "home.updateOverlayDismiss": "Continue",
 
   // Home relative time
   "home.relative.today": "Today",
@@ -1252,6 +2001,7 @@ const en: Dict = {
   "edit.cut": "Cut (⌘X)",
   "edit.paste": "Paste (⌘V)",
   "edit.clipboardEmpty": "Clipboard is empty",
+  "edit.pasteFailed": "Paste failed: {error}",
 
   // Global asset library (#56)
   "library.title": "Library",
diff --git a/web/src/i18n/index.test.ts b/web/src/i18n/index.test.ts
new file mode 100644
index 00000000..4e3f3926
--- /dev/null
+++ b/web/src/i18n/index.test.ts
@@ -0,0 +1,42 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, expect, it, vi } from "vitest";
+
+async function freshRuntime(persisted?: string) {
+  vi.resetModules();
+  localStorage.clear();
+  if (persisted !== undefined) localStorage.setItem("locale", persisted);
+  document.documentElement.lang = "";
+  return import("./index");
+}
+
+beforeEach(() => {
+  localStorage.clear();
+  document.documentElement.lang = "";
+});
+
+it("defaults_zh_cn_supports_en_and_preserves_unknown_named_placeholders", async () => {
+  const defaults = await freshRuntime();
+  expect(defaults.useI18nStore.getState().locale).toBe("zh-CN");
+  defaults.initI18n();
+  expect(document.documentElement.lang).toBe("zh-CN");
+  expect(defaults.t("home.samples")).toBe("示例项目");
+  expect(defaults.t("missing.translation.key")).toBe("missing.translation.key");
+  expect(defaults.t("export.done", { width: 1920, height: "1080" })).toContain("1920×1080");
+  expect(defaults.t("export.done", { width: 1920 })).toContain("{height}");
+  expect(defaults.t("export.done", { width: 1920 })).toContain("{frames}");
+
+  defaults.useI18nStore.getState().setLocale("en");
+  expect(localStorage.getItem("locale")).toBe("en");
+  expect(document.documentElement.lang).toBe("en");
+  expect(defaults.t("home.samples")).toBe("Sample projects");
+
+  const restored = await freshRuntime("en");
+  expect(restored.useI18nStore.getState().locale).toBe("en");
+  restored.initI18n();
+  expect(document.documentElement.lang).toBe("en");
+
+  const invalid = await freshRuntime("fr-CA");
+  expect(invalid.useI18nStore.getState().locale).toBe("zh-CN");
+  expect(localStorage.getItem("locale")).toBeNull();
+});
diff --git a/web/src/i18n/index.ts b/web/src/i18n/index.ts
index 40ef7f4e..0070dd08 100644
--- a/web/src/i18n/index.ts
+++ b/web/src/i18n/index.ts
@@ -11,12 +11,18 @@ import { create } from "zustand";
 import { DICTS, type Dict, type Locale } from "./dict";
 
 const LS_LOCALE = "locale";
-const DEFAULT_LOCALE: Locale = "zh-CN";
+export const DEFAULT_LOCALE: Locale = "zh-CN";
 
 function loadLocale(): Locale {
   if (typeof localStorage === "undefined") return DEFAULT_LOCALE;
-  const v = localStorage.getItem(LS_LOCALE);
-  return v === "en" || v === "zh-CN" ? v : DEFAULT_LOCALE;
+  try {
+    const value = localStorage.getItem(LS_LOCALE);
+    if (value === "en" || value === "zh-CN") return value;
+    if (value !== null) localStorage.removeItem(LS_LOCALE);
+  } catch {
+    // Storage can be unavailable in private or embedded browser contexts.
+  }
+  return DEFAULT_LOCALE;
 }
 
 interface I18nState {
@@ -27,7 +33,13 @@ interface I18nState {
 export const useI18nStore = create<I18nState>((set) => ({
   locale: loadLocale(),
   setLocale: (locale) => {
-    if (typeof localStorage !== "undefined") localStorage.setItem(LS_LOCALE, locale);
+    if (typeof localStorage !== "undefined") {
+      try {
+        localStorage.setItem(LS_LOCALE, locale);
+      } catch {
+        // The in-memory locale and document language should still update.
+      }
+    }
     if (typeof document !== "undefined") {
       document.documentElement.lang = locale === "zh-CN" ? "zh-CN" : "en";
     }
@@ -36,7 +48,11 @@ export const useI18nStore = create<I18nState>((set) => ({
 }));
 
 /** Translate `key` in `dict`, falling back to the key itself when missing. */
-function translate(dict: Dict, key: string, vars?: Record<string, string | number>): string {
+export function translate(
+  dict: Dict,
+  key: string,
+  vars?: Record<string, string | number>,
+): string {
   const template = dict[key] ?? key;
   if (!vars) return template;
   return template.replace(/\{(\w+)\}/g, (_m, name: string) =>
diff --git a/web/src/interactionParity.test.tsx b/web/src/interactionParity.test.tsx
new file mode 100644
index 00000000..496a7223
--- /dev/null
+++ b/web/src/interactionParity.test.tsx
@@ -0,0 +1,30 @@
+import { expect, it } from "vitest";
+import { timelineInteractionCursor } from "./components/timeline/TimelineContainer";
+import { CORNER_CURSOR } from "./components/preview/TransformOverlay";
+
+it("complete_hover_cursor_matrix", () => {
+  expect(CORNER_CURSOR).toEqual({
+    topLeft: "nwse-resize",
+    topRight: "nesw-resize",
+    bottomLeft: "nesw-resize",
+    bottomRight: "nwse-resize",
+  });
+
+  expect(timelineInteractionCursor({ toolMode: "pointer", inRuler: true })).toBe("pointer");
+  expect(
+    timelineInteractionCursor({ toolMode: "pointer", inRuler: true, shiftKey: true }),
+  ).toBe("crosshair");
+  expect(
+    timelineInteractionCursor({ toolMode: "pointer", hitRegion: "trimLeft" }),
+  ).toBe("ew-resize");
+  expect(
+    timelineInteractionCursor({ toolMode: "pointer", hitRegion: "trimRight" }),
+  ).toBe("ew-resize");
+  expect(timelineInteractionCursor({ toolMode: "pointer", hitRegion: "body" })).toBe("grab");
+  expect(timelineInteractionCursor({ toolMode: "razor", hitRegion: "body" })).toBe("crosshair");
+  expect(timelineInteractionCursor({ toolMode: "pointer", dragKind: "move" })).toBe("grabbing");
+  expect(timelineInteractionCursor({ toolMode: "pointer", dragKind: "trimLeft" })).toBe("ew-resize");
+  expect(timelineInteractionCursor({ toolMode: "pointer", dragKind: "marquee" })).toBe("crosshair");
+  expect(timelineInteractionCursor({ toolMode: "pointer", disabled: true })).toBe("not-allowed");
+  expect(timelineInteractionCursor({ toolMode: "pointer" })).toBe("default");
+});
diff --git a/web/src/lib/api.commandContract.test.ts b/web/src/lib/api.commandContract.test.ts
new file mode 100644
index 00000000..69734865
--- /dev/null
+++ b/web/src/lib/api.commandContract.test.ts
@@ -0,0 +1,41 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+
+const repositoryRoot = new URL("../../../", import.meta.url);
+const tauriLib = readFileSync(new URL("src-tauri/src/lib.rs", repositoryRoot), "utf8");
+const frontendBridges = ["web/src/lib/api.ts", "web/src/lib/libraryApi.ts", "web/src/lib/haptic.ts"]
+  .map((path) => readFileSync(new URL(path, repositoryRoot), "utf8"))
+  .join("\n");
+
+function registeredCommandNames(source: string): Set<string> {
+  const handlerBody = source.match(
+    /\.invoke_handler\(tauri::generate_handler!\[([\s\S]*?)\]\)/,
+  )?.[1];
+  expect(handlerBody, "Tauri invoke handler must remain statically discoverable").toBeDefined();
+  return new Set(
+    [...(handlerBody ?? "").matchAll(/(?:[A-Za-z_]\w*::)+(\w+),/g)].map(
+      ([, command]) => command,
+    ),
+  );
+}
+
+function frontendCommandNames(source: string): Set<string> {
+  const invokeImplNames = [...source.matchAll(/invokeImpl(?:<[\s\S]*?>)?\(\s*"([a-z0-9_]+)"/g)].map(
+    ([, command]) => command,
+  );
+  const directInvokeNames = [...source.matchAll(/core\.invoke[\s\S]{0,120}?\(\s*"([a-z0-9_]+)"/g)].map(
+    ([, command]) => command,
+  );
+  return new Set([...invokeImplNames, ...directInvokeNames]);
+}
+
+describe("Tauri command registry contract", () => {
+  it("frontend_command_names_match_invoke_handler", () => {
+    const registered = registeredCommandNames(tauriLib);
+    const invoked = frontendCommandNames(frontendBridges);
+    const missingHandlers = [...invoked].filter((command) => !registered.has(command)).sort();
+
+    expect(invoked.size).toBeGreaterThan(60);
+    expect(missingHandlers).toEqual([]);
+  });
+});
diff --git a/web/src/lib/api.denoise.test.ts b/web/src/lib/api.denoise.test.ts
new file mode 100644
index 00000000..b3f4ef4b
--- /dev/null
+++ b/web/src/lib/api.denoise.test.ts
@@ -0,0 +1,47 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({ invoke: vi.fn(), listen: vi.fn() }));
+
+vi.mock("@tauri-apps/api/core", () => ({ invoke: mocks.invoke }));
+vi.mock("@tauri-apps/api/event", () => ({ listen: mocks.listen }));
+
+describe("audio denoise IPC", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.stubGlobal("window", { __TAURI_INTERNALS__: {} });
+    mocks.invoke.mockReset().mockResolvedValue({});
+    mocks.listen.mockReset().mockResolvedValue(vi.fn());
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("passes all persisted processing parameters to the native validator", async () => {
+    const { prepareDenoise } = await import("./api");
+    await prepareDenoise("clip-a", "voice", 0.85, false);
+    expect(mocks.invoke).toHaveBeenCalledWith("prepare_denoise", {
+      clipId: "clip-a",
+      mode: "voice",
+      strength: 0.85,
+      previewEnabled: false,
+    });
+  });
+
+  it("filters progress by clip identity", async () => {
+    const { onDenoiseProgress } = await import("./api");
+    const handler = vi.fn();
+    await onDenoiseProgress("clip-a", handler);
+    const listener = mocks.listen.mock.calls[0]?.[1] as
+      | ((event: { payload: unknown }) => void)
+      | undefined;
+    listener?.({ payload: { clipId: "clip-b", done: 50, total: 100 } });
+    listener?.({ payload: { clipId: "clip-a", done: 75, total: 100 } });
+    expect(handler).toHaveBeenCalledOnce();
+    expect(handler).toHaveBeenCalledWith({ clipId: "clip-a", done: 75, total: 100 });
+  });
+
+  it("routes cooperative cancellation to the native analysis state", async () => {
+    const { cancelDenoiseAnalysis } = await import("./api");
+    await cancelDenoiseAnalysis();
+    expect(mocks.invoke).toHaveBeenCalledWith("cancel_denoise_analysis");
+  });
+});
diff --git a/web/src/lib/api.editApply.test.ts b/web/src/lib/api.editApply.test.ts
new file mode 100644
index 00000000..a8a97b96
--- /dev/null
+++ b/web/src/lib/api.editApply.test.ts
@@ -0,0 +1,62 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({ invoke: vi.fn() }));
+
+vi.mock("@tauri-apps/api/core", () => ({ invoke: mocks.invoke }));
+vi.mock("@tauri-apps/api/event", () => ({ listen: vi.fn() }));
+
+describe("edit_apply production IPC envelope", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.stubGlobal("window", { __TAURI_INTERNALS__: {} });
+    mocks.invoke.mockReset().mockResolvedValue({
+      changed: true,
+      actionName: "Move Clips",
+      affectedClipIds: ["clip-a"],
+      timelineVersion: 9,
+      summary: "Moved 1 clip",
+    });
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("edit_apply_forwards_exact_command_envelope", async () => {
+    const { editApply } = await import("./api");
+    const command = {
+      type: "moveClips" as const,
+      moves: [{ clipId: "clip-a", toTrack: 2, toFrame: 48 }],
+    };
+
+    const result = await editApply(command);
+
+    expect(mocks.invoke).toHaveBeenCalledTimes(1);
+    expect(mocks.invoke).toHaveBeenCalledWith("edit_apply", { command });
+    expect(result).toEqual({
+      changed: true,
+      actionName: "Move Clips",
+      affectedClipIds: ["clip-a"],
+      timelineVersion: 9,
+      summary: "Moved 1 clip",
+    });
+  });
+
+  it("preserves the stable typed command error", async () => {
+    mocks.invoke.mockRejectedValueOnce({
+      code: "validation",
+      message: "clipIds[0]: unknown clip",
+    });
+    const { editApply, TauriCommandError } = await import("./api");
+
+    await expect(editApply({ type: "removeClips", clipIds: ["missing"] })).rejects.toEqual(
+      expect.objectContaining({
+        name: "TauriCommandError",
+        code: "validation",
+        message: "clipIds[0]: unknown clip",
+      }),
+    );
+    await expect(
+      editApply({ type: "removeClips", clipIds: ["missing"] }),
+    ).resolves.toBeDefined();
+    expect(TauriCommandError.prototype).toBeInstanceOf(Error);
+  });
+});
diff --git a/web/src/lib/api.loudness.test.ts b/web/src/lib/api.loudness.test.ts
new file mode 100644
index 00000000..790fdbfe
--- /dev/null
+++ b/web/src/lib/api.loudness.test.ts
@@ -0,0 +1,40 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({ invoke: vi.fn(), listen: vi.fn() }));
+
+vi.mock("@tauri-apps/api/core", () => ({ invoke: mocks.invoke }));
+vi.mock("@tauri-apps/api/event", () => ({ listen: mocks.listen }));
+
+describe("loudness analysis IPC", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.stubGlobal("window", { __TAURI_INTERNALS__: {} });
+    mocks.invoke.mockReset().mockResolvedValue({});
+    mocks.listen.mockReset().mockResolvedValue(vi.fn());
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("passes the target and true-peak ceiling to the native analyzer", async () => {
+    const { analyzeLoudness } = await import("./api");
+    await analyzeLoudness("clip-a", -16, -1);
+    expect(mocks.invoke).toHaveBeenCalledWith("analyze_loudness", {
+      clipId: "clip-a",
+      targetLufs: -16,
+      truePeakCeilingDbtp: -1,
+    });
+  });
+
+  it("filters progress by clip identity", async () => {
+    const { onLoudnessProgress } = await import("./api");
+    const handler = vi.fn();
+    await onLoudnessProgress("clip-a", handler);
+    const listener = mocks.listen.mock.calls[0]?.[1] as
+      | ((event: { payload: unknown }) => void)
+      | undefined;
+    listener?.({ payload: { clipId: "clip-b", done: 50, total: 100 } });
+    listener?.({ payload: { clipId: "clip-a", done: 75, total: 100 } });
+    expect(handler).toHaveBeenCalledOnce();
+    expect(handler).toHaveBeenCalledWith({ clipId: "clip-a", done: 75, total: 100 });
+  });
+});
diff --git a/web/src/lib/api.proxy.test.ts b/web/src/lib/api.proxy.test.ts
new file mode 100644
index 00000000..b242c1db
--- /dev/null
+++ b/web/src/lib/api.proxy.test.ts
@@ -0,0 +1,46 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({ invoke: vi.fn(), listen: vi.fn() }));
+
+vi.mock("@tauri-apps/api/core", () => ({ invoke: mocks.invoke }));
+vi.mock("@tauri-apps/api/event", () => ({ listen: mocks.listen }));
+
+describe("media proxy IPC", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.stubGlobal("window", { __TAURI_INTERNALS__: {} });
+    mocks.invoke.mockReset().mockResolvedValue({});
+    mocks.listen.mockReset().mockResolvedValue(vi.fn());
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("keeps proxy creation bounded and playback preference separate", async () => {
+    const { createMediaProxy, setProxyPlaybackEnabled } = await import("./api");
+    await createMediaProxy("asset-a", 960, 540);
+    expect(mocks.invoke).toHaveBeenCalledWith("create_media_proxy", {
+      assetId: "asset-a",
+      maxWidth: 960,
+      maxHeight: 540,
+    });
+    await setProxyPlaybackEnabled(true);
+    expect(mocks.invoke).toHaveBeenCalledWith("set_proxy_playback_enabled", { enabled: true });
+  });
+
+  it("filters progress by asset and exposes cancel/remove", async () => {
+    const { cancelMediaProxy, onMediaProxyProgress, removeMediaProxy } = await import("./api");
+    const handler = vi.fn();
+    await onMediaProxyProgress("asset-a", handler);
+    const listener = mocks.listen.mock.calls[0]?.[1] as
+      | ((event: { payload: unknown }) => void)
+      | undefined;
+    listener?.({ payload: { assetId: "asset-b", done: 100, total: 1000 } });
+    listener?.({ payload: { assetId: "asset-a", done: 500, total: 1000 } });
+    expect(handler).toHaveBeenCalledOnce();
+    expect(handler).toHaveBeenCalledWith({ assetId: "asset-a", done: 500, total: 1000 });
+    await cancelMediaProxy();
+    await removeMediaProxy("asset-a");
+    expect(mocks.invoke).toHaveBeenCalledWith("cancel_media_proxy");
+    expect(mocks.invoke).toHaveBeenCalledWith("remove_media_proxy", { assetId: "asset-a" });
+  });
+});
diff --git a/web/src/lib/api.stems.test.ts b/web/src/lib/api.stems.test.ts
new file mode 100644
index 00000000..1ed0f89b
--- /dev/null
+++ b/web/src/lib/api.stems.test.ts
@@ -0,0 +1,54 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const mocks = vi.hoisted(() => ({ invoke: vi.fn(), listen: vi.fn() }));
+
+vi.mock("@tauri-apps/api/core", () => ({ invoke: mocks.invoke }));
+vi.mock("@tauri-apps/api/event", () => ({ listen: mocks.listen }));
+
+describe("stem separation IPC", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.stubGlobal("window", { __TAURI_INTERNALS__: {} });
+    mocks.invoke.mockReset().mockResolvedValue({});
+    mocks.listen.mockReset().mockResolvedValue(vi.fn());
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("passes explicit local/hosted privacy routing fields", async () => {
+    const { separateAudioStems } = await import("./api");
+    await separateAudioStems("asset-a", "hosted", "stemhost", "stemhost:v1", true);
+    expect(mocks.invoke).toHaveBeenCalledWith("separate_audio_stems", {
+      sourceAssetId: "asset-a",
+      execution: "hosted",
+      provider: "stemhost",
+      model: "stemhost:v1",
+      uploadConfirmed: true,
+    });
+  });
+
+  it("filters progress by source asset and routes cancellation", async () => {
+    const { cancelStemSeparation, onStemSeparationProgress } = await import("./api");
+    const handler = vi.fn();
+    await onStemSeparationProgress("asset-a", handler);
+    const listener = mocks.listen.mock.calls[0]?.[1] as
+      | ((event: { payload: unknown }) => void)
+      | undefined;
+    listener?.({ payload: { sourceAssetId: "asset-b", done: 2, total: 10 } });
+    listener?.({ payload: { sourceAssetId: "asset-a", done: 7, total: 10 } });
+    expect(handler).toHaveBeenCalledOnce();
+    expect(handler).toHaveBeenCalledWith({ sourceAssetId: "asset-a", done: 7, total: 10 });
+    await cancelStemSeparation();
+    expect(mocks.invoke).toHaveBeenCalledWith("cancel_stem_separation");
+  });
+
+  it("imports_reviewed_stems_to_aligned_tracks", async () => {
+    const { importStemsToTracks } = await import("./api");
+    await importStemsToTracks("vocals", "music", 42);
+    expect(mocks.invoke).toHaveBeenCalledWith("import_stems_to_tracks", {
+      vocalsAssetId: "vocals",
+      accompanimentAssetId: "music",
+      startFrame: 42,
+    });
+  });
+});
diff --git a/web/src/lib/api.ts b/web/src/lib/api.ts
index 9f7c475e..9980f799 100644
--- a/web/src/lib/api.ts
+++ b/web/src/lib/api.ts
@@ -11,6 +11,7 @@
 import type {
   AccountInfo,
   AccountStatus,
+  AudioDenoise,
   CaptionRequest,
   ChatMessage,
   ChatSession,
@@ -20,6 +21,21 @@ import type {
   EditResult,
   GenerateCaptionsResult,
   MediaList,
+  MattingModelStatus,
+  MotionTrackingRegion,
+  MotionTrackingResult,
+  GenerateMatteResult,
+  RemoveObjectResult,
+  MatchColorResult,
+  CaptionTranslationResult,
+  CaptionTranslationReviewChange,
+  ScriptToVideoResult,
+  ScriptToVideoSegmentInput,
+  AvatarGenerationResult,
+  VoiceCloneResult,
+  LutReference,
+  LoudnessNormalization,
+  DenoiseMode,
   ModelStatus,
   PlaybackCommandError,
   PlaybackFrameEvent,
@@ -29,6 +45,7 @@ import type {
   SearchModelStatus,
   SearchResults,
   SecretStatus,
+  StabilizationTrack,
   Transcript,
 } from "./types";
 
@@ -43,6 +60,31 @@ type ListenFn = (
   handler: (e: { payload: unknown }) => void,
 ) => Promise<() => void>;
 
+/** Stable machine-readable error returned by typed core/edit Tauri commands. */
+export class TauriCommandError extends Error {
+  readonly code: string;
+
+  constructor(code: string, message: string) {
+    super(message);
+    this.name = "TauriCommandError";
+    this.code = code;
+  }
+}
+
+function asTauriCommandError(error: unknown): Error {
+  if (
+    typeof error === "object" &&
+    error !== null &&
+    "code" in error &&
+    typeof error.code === "string" &&
+    "message" in error &&
+    typeof error.message === "string"
+  ) {
+    return new TauriCommandError(error.code, error.message);
+  }
+  return error instanceof Error ? error : new Error(String(error));
+}
+
 let invokeImpl: InvokeFn | null = null;
 let listenImpl: ListenFn | null = null;
 
@@ -70,29 +112,31 @@ export async function getTimeline(): Promise<RuntimeTimelineSnapshot> {
 
 export async function editApply(command: EditRequest): Promise<EditResult> {
   await ensureTauri();
-  if (invokeImpl) return invokeImpl<EditResult>("edit_apply", { command });
-  return fallback.editApply(command);
-}
-
-/** Sequential automation wrapper: each command still goes through the single
- * Rust `EditCommand` authority via `edit_apply`. */
-export async function editApplyMany(commands: EditRequest[]): Promise<EditResult[]> {
-  const results: EditResult[] = [];
-  for (const command of commands) {
-    results.push(await editApply(command));
+  if (invokeImpl) {
+    return invokeImpl<EditResult>("edit_apply", { command }).catch((error: unknown) => {
+      throw asTauriCommandError(error);
+    });
   }
-  return results;
+  return fallback.editApply(command);
 }
 
 export async function undo(): Promise<EditResult> {
   await ensureTauri();
-  if (invokeImpl) return invokeImpl<EditResult>("undo");
+  if (invokeImpl) {
+    return invokeImpl<EditResult>("undo").catch((error: unknown) => {
+      throw asTauriCommandError(error);
+    });
+  }
   return fallback.noop("Undo");
 }
 
 export async function redo(): Promise<EditResult> {
   await ensureTauri();
-  if (invokeImpl) return invokeImpl<EditResult>("redo");
+  if (invokeImpl) {
+    return invokeImpl<EditResult>("redo").catch((error: unknown) => {
+      throw asTauriCommandError(error);
+    });
+  }
   return fallback.noop("Redo");
 }
 
@@ -108,10 +152,10 @@ export async function canRedo(): Promise<boolean> {
   return false;
 }
 
-export async function projectNew(): Promise<RuntimeTimelineSnapshot> {
+export async function projectNew(path: string | null = null): Promise<RuntimeTimelineSnapshot> {
   await ensureTauri();
   if (invokeImpl) {
-    return invokeImpl<RuntimeTimelineSnapshot>("project_new");
+    return invokeImpl<RuntimeTimelineSnapshot>("project_new", { path });
   }
   fallback.reset();
   return {
@@ -137,7 +181,11 @@ export async function projectOpen(path: string): Promise<RuntimeTimelineSnapshot
 
 export async function projectSave(path: string | null): Promise<string> {
   await ensureTauri();
-  if (invokeImpl) return invokeImpl<string>("project_save", { path });
+  if (invokeImpl) {
+    return invokeImpl<string>("project_save", { path }).catch((error: unknown) => {
+      throw asTauriCommandError(error);
+    });
+  }
   return path ?? "";
 }
 
@@ -149,6 +197,62 @@ export async function getDefaultProjectDir(): Promise<string> {
   return "";
 }
 
+export async function sampleProjectMaterialize(slug: string): Promise<string> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<string>("sample_project_materialize", { slug });
+  throw new Error("Sample projects require the OpenTake desktop app");
+}
+
+export interface HomeProjectEntry {
+  path: string;
+  name: string;
+  createdAt: number;
+  openedAt: number;
+  modifiedAt: number;
+  thumbnailPath?: string | null;
+  missing: boolean;
+}
+
+export interface LegacyRecentProject {
+  path: string;
+  openedAt: number;
+  createdAt?: number;
+  modifiedAt?: number;
+  thumbnailPath?: string | null;
+}
+
+export async function homeProjectsSync(
+  entries: LegacyRecentProject[],
+): Promise<HomeProjectEntry[]> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<HomeProjectEntry[]>("home_projects_sync", { entries });
+  throw new Error("Recent project sync requires the OpenTake desktop app");
+}
+
+export async function homeProjectRegister(path: string, openedAt: number): Promise<void> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<void>("home_project_register", { path, openedAt });
+  throw new Error("Recent project registration requires the OpenTake desktop app");
+}
+
+export async function homeProjectRemove(path: string): Promise<void> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<void>("home_project_remove", { path });
+  throw new Error("Recent project removal requires the OpenTake desktop app");
+}
+
+export async function homeProjectTrash(path: string): Promise<void> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<void>("home_project_trash", { path });
+  throw new Error("Moving a project to trash requires the OpenTake desktop app");
+}
+
+export async function homeProjectReveal(path: string): Promise<void> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<void>("home_project_reveal", { path });
+  throw new Error("Revealing a project requires the OpenTake desktop app");
+}
+
 // MARK: - Timeline interchange export (XMEML / EDL / OTIO / FCPXML)
 //
 // Four standard editorial-interchange formats, each a thin path-only command
@@ -329,6 +433,76 @@ export async function retryGeneration(
   throw new Error("Generation retry is available only in the desktop app");
 }
 
+export type MotionProgressPhase =
+  | "validating"
+  | "rendering"
+  | "encoding"
+  | "committing"
+  | "complete";
+
+export interface MotionAddRequest {
+  code?: string;
+  templateId?: "title-card" | "lower-third.glass";
+  params?: Record<string, string>;
+  startFrame: number;
+  durationFrames: number;
+  transparent?: boolean;
+  trackIndex?: number;
+}
+
+export interface MotionCommit {
+  clipId: string;
+  assetId: string;
+  contentHash: string;
+  actionName: string;
+  output: {
+    renderer: string;
+    rendererVersion: string;
+    outputFile: string;
+    fps: number;
+    width: number;
+    height: number;
+    durationFrames: number;
+    durationSeconds: number;
+    contentHash: string;
+  };
+}
+
+export async function motionCapability(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("motion_capability");
+  return false;
+}
+
+export async function addMotion(request: MotionAddRequest): Promise<MotionCommit> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<MotionCommit>("motion_add", { request });
+  throw new Error("Motion graphics require the desktop app");
+}
+
+export async function cancelMotion(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("motion_cancel");
+  return false;
+}
+
+export async function onMotionProgress(
+  handler: (phase: MotionProgressPhase) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("motion_progress", (event) => {
+    if (
+      typeof event.payload === "string" &&
+      ["validating", "rendering", "encoding", "committing", "complete"].includes(
+        event.payload,
+      )
+    ) {
+      handler(event.payload as MotionProgressPhase);
+    }
+  });
+}
+
 /** Progress payload for `"export://progress"`: `done` of `total` frames
  *  composited so far. */
 export interface ExportProgress {
@@ -363,7 +537,11 @@ export async function onExportProgress(
 
 // MARK: - Self-contained `.opentake` bundle export (#29 / upstream `.palmier`)
 //
-// `export_bundle` writes a self-contained `.opentake` bundle to disk: every
+// The self-contained `.opentake` bundle capability is intentionally withdrawn:
+// its Rust-owned destination/disclosure workflow is not integrated yet. The
+// compatibility types and fail-closed function stay available to the disabled
+// UI branch, but no renderer call is sent to an unregistered Tauri command.
+// A future secure command may write a bundle containing every
 // resolvable media reference is copied inside and the manifest is rewritten to
 // bundle-relative paths, so the project opens on any machine (port of upstream
 // `ExportService.exportPalmierProject` / `PalmierProjectExporter`). It carries
@@ -392,12 +570,10 @@ export interface BundleReport {
   totalBytes: number;
 }
 
-/** Write a self-contained `.opentake` bundle to `outPath`, returning the
- *  missing-media report. Rejects outside Tauri (no core / no FS). */
+/** Fail-closed capability gate for the unavailable secure bundle workflow. */
 export async function exportBundle(outPath: string): Promise<BundleReport> {
-  await ensureTauri();
-  if (invokeImpl) return invokeImpl<BundleReport>("export_bundle", { outPath });
-  throw new Error("bundle export requires the desktop app");
+  void outPath;
+  throw new Error("secure bundle export is not available in this build");
 }
 
 // MARK: - Media commands
@@ -422,6 +598,13 @@ export async function importMedia(paths: string[]): Promise<MediaList> {
   return { items: [], folders: [] };
 }
 
+/** Validate and copy one `.cube` into the active project's managed storage. */
+export async function importLut(path: string): Promise<LutReference> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<LutReference>("import_lut", { path });
+  throw new Error("3D LUT import requires the desktop app");
+}
+
 export async function getMedia(): Promise<MediaList> {
   await ensureTauri();
   if (invokeImpl) return invokeImpl<MediaList>("get_media");
@@ -560,6 +743,227 @@ export async function onTranscribeProgress(
   });
 }
 
+// MARK: - On-device AI matting
+
+export async function mattingModelStatus(): Promise<MattingModelStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<MattingModelStatus>("matting_model_status");
+  return { installed: false, model: "", bytes: 0, sha256: "" };
+}
+
+export async function downloadMattingModel(): Promise<MattingModelStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<MattingModelStatus>("download_matting_model");
+  throw new Error("matting model download requires the desktop app");
+}
+
+export async function cancelMattingModelDownload(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_matting_model_download");
+  return false;
+}
+
+export async function onMattingProgress(
+  handler: (progress: { fraction: number; downloadedBytes: number; totalBytes: number }) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("matting://progress", (event) => {
+    const value = event.payload as
+      | { fraction?: number; downloadedBytes?: number; totalBytes?: number }
+      | undefined;
+    if (
+      value &&
+      typeof value.fraction === "number" &&
+      typeof value.downloadedBytes === "number" &&
+      typeof value.totalBytes === "number"
+    ) {
+      handler({
+        fraction: value.fraction,
+        downloadedBytes: value.downloadedBytes,
+        totalBytes: value.totalBytes,
+      });
+    }
+  });
+}
+
+export async function generateMatte(
+  clipId: string,
+  apply: boolean,
+  range?: { startFrame?: number; endFrame?: number },
+): Promise<GenerateMatteResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<GenerateMatteResult>("advanced_generate_matte", {
+      request: {
+        clipId,
+        apply,
+        ...(range?.startFrame == null ? {} : { startFrame: range.startFrame }),
+        ...(range?.endFrame == null ? {} : { endFrame: range.endFrame }),
+      },
+    });
+  }
+  throw new Error("AI matting requires the desktop app");
+}
+
+export async function trackMotion(
+  clipId: string,
+  region: MotionTrackingRegion,
+  range: { startFrame: number; endFrame: number },
+  apply: boolean,
+): Promise<MotionTrackingResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<MotionTrackingResult>("advanced_track_motion", {
+      request: {
+        clipId,
+        region,
+        startFrame: range.startFrame,
+        endFrame: range.endFrame,
+        apply,
+      },
+    });
+  }
+  throw new Error("motion tracking requires the desktop app");
+}
+
+export async function removeObject(
+  clipId: string,
+  apply: boolean,
+  range: { startFrame: number; endFrame: number },
+): Promise<RemoveObjectResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<RemoveObjectResult>("advanced_remove_object", {
+      request: {
+        clipId,
+        maskId: "primary",
+        provider: "local",
+        model: "opentake-boundary-fill-v1",
+        startFrame: range.startFrame,
+        endFrame: range.endFrame,
+        apply,
+      },
+    });
+  }
+  throw new Error("object removal requires the desktop app");
+}
+
+export async function matchColor(
+  clipId: string,
+  referenceMediaRef: string,
+  referenceFrame: number,
+  targetFrame: number,
+  apply: boolean,
+): Promise<MatchColorResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<MatchColorResult>("advanced_match_color", {
+      request: {
+        clipId,
+        referenceMediaRef,
+        referenceFrame,
+        targetFrame,
+        apply,
+      },
+    });
+  }
+  throw new Error("color match requires the desktop app");
+}
+
+export async function translateCaptions(
+  captionClipIds: string[],
+  sourceLocale: string,
+  targetLocale: string,
+  provider: "openai" | "anthropic",
+  costAuthorized: boolean,
+): Promise<CaptionTranslationResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<CaptionTranslationResult>("advanced_translate_captions", {
+      request: {
+        captionClipIds,
+        sourceLocale: sourceLocale.trim() || "auto",
+        targetLocale: targetLocale.trim(),
+        provider,
+        costAuthorized,
+        apply: false,
+      },
+    });
+  }
+  throw new Error("caption translation requires the desktop app");
+}
+
+export async function applyCaptionTranslationReview(
+  result: CaptionTranslationResult["result"],
+  changes: CaptionTranslationReviewChange[],
+): Promise<GenerateMatteResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<GenerateMatteResult>("advanced_apply_caption_translation_review", {
+      request: {
+        projectEpoch: result.projectEpoch,
+        version: result.version,
+        sourceLocale: result.sourceLocale,
+        targetLocale: result.targetLocale,
+        provider: result.provider,
+        model: result.model,
+        changes,
+      },
+    });
+  }
+  throw new Error("caption translation review requires the desktop app");
+}
+
+export async function scriptToVideo(
+  segments: ScriptToVideoSegmentInput[],
+  apply: boolean,
+): Promise<ScriptToVideoResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<ScriptToVideoResult>("advanced_script_to_video", {
+      request: { segments, apply },
+    });
+  }
+  throw new Error("script-to-video requires the desktop app");
+}
+
+export async function generateAvatar(request: {
+  portraitMediaRef: string;
+  audioMediaRef: string;
+  consentId: string;
+  costAuthorized: boolean;
+  startFrame?: number;
+}): Promise<AvatarGenerationResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<AvatarGenerationResult>("advanced_generate_avatar", { request });
+  }
+  throw new Error("avatar generation requires the desktop app");
+}
+
+export async function cloneVoice(request: {
+  action: "enroll" | "generate" | "revoke";
+  consentId: string;
+  referenceAudioMediaRef?: string;
+  voiceId?: string;
+  voiceName?: string;
+  prompt?: string;
+  costAuthorized?: boolean;
+}): Promise<VoiceCloneResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<VoiceCloneResult>("advanced_clone_voice", { request });
+  }
+  throw new Error("voice cloning requires the desktop app");
+}
+
+export async function cancelAdvancedWorkflow(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_advanced_workflow");
+  return false;
+}
+
 /** Transcribe one asset (cached, so repeats are instant). `language` is an
  *  optional BCP-47/ISO-639 hint; omit for auto-detect. Rejects outside Tauri. */
 export async function transcribeMedia(
@@ -836,6 +1240,7 @@ export interface CompositeStillRequest {
   sessionId: string;
   sessionGeneration: number;
   seekGeneration: number;
+  sequenceId?: string;
 }
 
 export interface CancelCompositeStillRequest {
@@ -920,6 +1325,262 @@ export async function getWaveform(mediaRef: string): Promise<number[] | null> {
   return null;
 }
 
+export async function analyzeStabilization(clipId: string): Promise<StabilizationTrack> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<StabilizationTrack>("analyze_stabilization", { clipId });
+  }
+  throw new Error("stabilization analysis requires the desktop app");
+}
+
+export async function cancelStabilizationAnalysis(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_stabilization_analysis");
+  return false;
+}
+
+export interface LoudnessProgress {
+  clipId: string;
+  done: number;
+  total: number;
+}
+
+export async function analyzeLoudness(
+  clipId: string,
+  targetLufs: number,
+  truePeakCeilingDbtp: number,
+): Promise<LoudnessNormalization> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<LoudnessNormalization>("analyze_loudness", {
+      clipId,
+      targetLufs,
+      truePeakCeilingDbtp,
+    });
+  }
+  throw new Error("loudness analysis requires the desktop app");
+}
+
+export async function cancelLoudnessAnalysis(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_loudness_analysis");
+  return false;
+}
+
+export async function onLoudnessProgress(
+  clipId: string,
+  handler: (progress: LoudnessProgress) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("loudness://progress", (event) => {
+    const progress = event.payload as Partial<LoudnessProgress> | undefined;
+    if (
+      progress?.clipId === clipId &&
+      typeof progress.done === "number" &&
+      typeof progress.total === "number"
+    ) {
+      handler(progress as LoudnessProgress);
+    }
+  });
+}
+
+export interface DenoiseProgress {
+  clipId: string;
+  done: number;
+  total: number;
+}
+
+export async function prepareDenoise(
+  clipId: string,
+  mode: DenoiseMode,
+  strength: number,
+  previewEnabled: boolean,
+): Promise<AudioDenoise> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<AudioDenoise>("prepare_denoise", {
+      clipId,
+      mode,
+      strength,
+      previewEnabled,
+    });
+  }
+  throw new Error("audio denoise requires the desktop app");
+}
+
+export async function cancelDenoiseAnalysis(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_denoise_analysis");
+  return false;
+}
+
+export async function onDenoiseProgress(
+  clipId: string,
+  handler: (progress: DenoiseProgress) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("denoise://progress", (event) => {
+    const progress = event.payload as Partial<DenoiseProgress> | undefined;
+    if (
+      progress?.clipId === clipId &&
+      typeof progress.done === "number" &&
+      typeof progress.total === "number"
+    ) {
+      handler(progress as DenoiseProgress);
+    }
+  });
+}
+
+export interface StemSeparationProgress {
+  sourceAssetId: string;
+  done: number;
+  total: number;
+}
+
+export interface StemSeparationResult {
+  vocalsAssetId: string;
+  accompanimentAssetId: string;
+  sourceSha256: string;
+  execution: string;
+  modelSha256?: string | null;
+  vocalSdrImprovementDb: number;
+}
+
+export async function separateAudioStems(
+  sourceAssetId: string,
+  execution: "local" | "hosted",
+  provider: string | null = null,
+  model: string | null = null,
+  uploadConfirmed = false,
+): Promise<StemSeparationResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<StemSeparationResult>("separate_audio_stems", {
+      sourceAssetId,
+      execution,
+      provider,
+      model,
+      uploadConfirmed,
+    });
+  }
+  throw new Error("stem separation requires the desktop app");
+}
+
+export async function cancelStemSeparation(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_stem_separation");
+  return false;
+}
+
+export interface ImportStemsToTracksResult {
+  clipIds: string[];
+  actionName: string;
+}
+
+export async function importStemsToTracks(
+  vocalsAssetId: string,
+  accompanimentAssetId: string,
+  startFrame: number,
+): Promise<ImportStemsToTracksResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<ImportStemsToTracksResult>("import_stems_to_tracks", {
+      vocalsAssetId,
+      accompanimentAssetId,
+      startFrame,
+    });
+  }
+  throw new Error("stem track import requires the desktop app");
+}
+
+export interface MediaProxyResult {
+  assetId: string;
+  path: string;
+  sourceSha256: string;
+  width: number;
+  height: number;
+}
+
+export interface MediaProxyProgress {
+  assetId: string;
+  done: number;
+  total: number;
+}
+
+export async function createMediaProxy(
+  assetId: string,
+  maxWidth = 1280,
+  maxHeight = 720,
+): Promise<MediaProxyResult> {
+  await ensureTauri();
+  if (invokeImpl) {
+    return invokeImpl<MediaProxyResult>("create_media_proxy", { assetId, maxWidth, maxHeight });
+  }
+  throw new Error("proxy creation requires the desktop app");
+}
+
+export async function cancelMediaProxy(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("cancel_media_proxy");
+  return false;
+}
+
+export async function removeMediaProxy(assetId: string): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("remove_media_proxy", { assetId });
+  return false;
+}
+
+export async function setProxyPlaybackEnabled(enabled: boolean): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("set_proxy_playback_enabled", { enabled });
+  return enabled;
+}
+
+export async function getProxyPlaybackEnabled(): Promise<boolean> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<boolean>("get_proxy_playback_enabled");
+  return false;
+}
+
+export async function onMediaProxyProgress(
+  assetId: string,
+  handler: (progress: MediaProxyProgress) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("proxy://progress", (event) => {
+    const progress = event.payload as Partial<MediaProxyProgress> | undefined;
+    if (
+      progress?.assetId === assetId &&
+      typeof progress.done === "number" &&
+      typeof progress.total === "number"
+    ) {
+      handler(progress as MediaProxyProgress);
+    }
+  });
+}
+
+export async function onStemSeparationProgress(
+  sourceAssetId: string,
+  handler: (progress: StemSeparationProgress) => void,
+): Promise<() => void> {
+  await ensureTauri();
+  if (!listenImpl) return () => {};
+  return listenImpl("stems://progress", (event) => {
+    const progress = event.payload as Partial<StemSeparationProgress> | undefined;
+    if (
+      progress?.sourceAssetId === sourceAssetId &&
+      typeof progress.done === "number" &&
+      typeof progress.total === "number"
+    ) {
+      handler(progress as StemSeparationProgress);
+    }
+  });
+}
+
 // MARK: - BYOK secret store
 //
 // API keys are stored in the OS keychain by the Rust backend (`secret_*`
@@ -951,6 +1612,54 @@ export async function secretDelete(provider: string): Promise<SecretStatus> {
   return NO_SECRET;
 }
 
+// MARK: - Official Codex / ChatGPT authentication
+//
+// OpenTake never receives a ChatGPT token. These commands only ask the
+// user-installed official Codex CLI to report, start, cancel, or clear its own
+// login session.
+
+export interface CodexAuthStatus {
+  available: boolean;
+  authenticated: boolean;
+  authMethod: string | null;
+  version: string | null;
+  loginInProgress: boolean;
+  message: string;
+}
+
+const NO_CODEX: CodexAuthStatus = {
+  available: false,
+  authenticated: false,
+  authMethod: null,
+  version: null,
+  loginInProgress: false,
+  message: "Official Codex CLI is available only in the desktop app",
+};
+
+export async function codexAuthStatus(): Promise<CodexAuthStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<CodexAuthStatus>("codex_auth_status");
+  return NO_CODEX;
+}
+
+export async function codexLoginStart(): Promise<CodexAuthStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<CodexAuthStatus>("codex_login_start");
+  return NO_CODEX;
+}
+
+export async function codexLoginCancel(): Promise<CodexAuthStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<CodexAuthStatus>("codex_login_cancel");
+  return NO_CODEX;
+}
+
+export async function codexLogout(): Promise<CodexAuthStatus> {
+  await ensureTauri();
+  if (invokeImpl) return invokeImpl<CodexAuthStatus>("codex_logout");
+  return NO_CODEX;
+}
+
 // MARK: - Optional account backend
 //
 // OpenTake has no official backend. Outside Tauri, and before a user stores a
diff --git a/web/src/lib/clip.test.ts b/web/src/lib/clip.test.ts
index 0ed793f4..179899fe 100644
--- a/web/src/lib/clip.test.ts
+++ b/web/src/lib/clip.test.ts
@@ -3,6 +3,7 @@ import {
   clampTrimDeltaFrames,
   dbFromLinear,
   findCropEditingClip,
+  findLogicalSingleClip,
   findSelectedVisualClip,
   fitTransformForMedia,
   liveVolumeKfLinearAt,
@@ -519,6 +520,26 @@ describe("findCropEditingClip (upstream CropOverlayView.selectedClip port)", ()
   });
 });
 
+describe("findLogicalSingleClip", () => {
+  const visual = clip({ id: "linked-video", linkGroupId: "group" });
+  const audio = clip({ id: "linked-audio", mediaType: "audio", linkGroupId: "group" });
+  const other = clip({ id: "other" });
+  const tl = timeline([
+    track({ id: "vt", type: "video", clips: [visual, other] }),
+    track({ id: "at", type: "audio", clips: [audio] }),
+  ]);
+
+  it("treats one linked video and audio companion as one logical clip", () => {
+    expect(findLogicalSingleClip(tl, new Set([visual.id, audio.id]))).toBe(visual);
+    expect(findSelectedVisualClip(tl, new Set([visual.id, audio.id]))).toBe(visual);
+    expect(findCropEditingClip(tl, new Set([visual.id, audio.id]))).toBe(visual);
+  });
+
+  it("keeps unrelated clips as a genuine marquee selection", () => {
+    expect(findLogicalSingleClip(tl, new Set([visual.id, other.id]))).toBeNull();
+  });
+});
+
 function fullClip(overrides: Partial<Clip> = {}): Clip {
   return {
     id: "c1",
@@ -578,6 +599,24 @@ describe("animated-value inspector seed (raw track sample, no fade/gain)", () =>
     expect(volumeAt(clip, 15)).toBeCloseTo((raw as number) * 2 * 0.25);
   });
 
+  it("volumeAt applies persisted loudness gain on top of authored controls", () => {
+    const clip = fullClip({
+      mediaType: "audio",
+      sourceClipType: "audio",
+      volume: 0.5,
+      loudnessNormalization: {
+        targetLufs: -16,
+        truePeakCeilingDbtp: -1,
+        inputIntegratedLufs: -22,
+        inputTruePeakDbtp: -8,
+        gainDb: 6,
+        outputIntegratedLufs: -16,
+        outputTruePeakDbtp: -2,
+      },
+    });
+    expect(volumeAt(clip, 15)).toBeCloseTo(0.5 * 10 ** (6 / 20));
+  });
+
   it("rawOpacityAt returns the authored track value, excluding the fade envelope", () => {
     const clip = fullClip({
       fadeInFrames: 20,
diff --git a/web/src/lib/clip.ts b/web/src/lib/clip.ts
index f6f02ca6..82a0311b 100644
--- a/web/src/lib/clip.ts
+++ b/web/src/lib/clip.ts
@@ -699,7 +699,10 @@ export function volumeAt(clip: Clip, frame: number): number {
   const kfGain = trackIsActive(clip.volumeTrack)
     ? linearFromDb(sampleScalarTrack(clip.volumeTrack, keyframeOffset(clip, frame), 0.0))
     : 1.0;
-  return clip.volume * kfGain * fadeMultiplier(clip, frame);
+  const loudnessGain = clip.loudnessNormalization
+    ? 10 ** (Math.max(-120, Math.min(60, clip.loudnessNormalization.gainDb)) / 20)
+    : 1.0;
+  return clip.volume * kfGain * loudnessGain * fadeMultiplier(clip, frame);
 }
 
 /**
@@ -812,14 +815,42 @@ export function linkOffsetForClip(timeline: Timeline, clipId: string): number |
   return offset;
 }
 
+/** Resolve one logical clip selection. A linked source video and its extracted
+ * audio companion are selected together by timeline gestures, but represent one
+ * user-facing clip for Inspector and on-canvas editing. Genuine marquee
+ * selections, mixed link groups, or groups with multiple visual clips remain
+ * multi-select and return `null`. */
+export function findLogicalSingleClip(
+  timeline: Timeline,
+  selectedClipIds: Set<string> | undefined,
+): Clip | null {
+  if (!selectedClipIds || selectedClipIds.size === 0) return null;
+  const selected = timeline.tracks.flatMap((track) =>
+    track.clips.filter((candidate) => selectedClipIds.has(candidate.id)),
+  );
+  if (selected.length !== selectedClipIds.size) return null;
+  if (selected.length === 1) return selected[0];
+
+  const linkGroupId = selected[0]?.linkGroupId;
+  if (!linkGroupId || selected.some((candidate) => candidate.linkGroupId !== linkGroupId)) {
+    return null;
+  }
+  const primary = selected.filter(
+    (candidate) => candidate.mediaType !== "audio" && candidate.mediaType !== "text",
+  );
+  const companionsAreAudio = selected
+    .filter((candidate) => candidate.id !== primary[0]?.id)
+    .every((candidate) => candidate.mediaType === "audio");
+  return primary.length === 1 && companionsAreAudio ? primary[0] : null;
+}
+
 /**
  * The single clip the on-canvas Transform overlay should target, or `null` if
  * it shouldn't render. Adapts upstream `TransformOverlayView.selectedClip`
  * (TransformOverlayView.swift:304-313), which scans every non-audio track for
- * ANY selected clip and returns the first match (so it can render even with
- * other clips also selected). OpenTake tightens this to exactly one clip
- * selected total, per the feature's "single visual clip selected" scope —
- * still a strict subset of when upstream would show the overlay, never wider.
+ * ANY selected clip and returns the first match. OpenTake accepts one logical
+ * selection, including a source video plus its selected linked-audio companion,
+ * while still refusing genuine marquee selections.
  * `track.type !== "audio"` mirrors upstream's `track.type != .audio` (covers
  * video/image/text/lottie — any non-audio track), not `clip.mediaType`.
  * `selectedClipIds` is optional so callers (and test mocks of the UI store)
@@ -829,12 +860,12 @@ export function findSelectedVisualClip(
   timeline: Timeline,
   selectedClipIds: Set<string> | undefined,
 ): Clip | null {
-  if (!selectedClipIds || selectedClipIds.size !== 1) return null;
-  const [id] = selectedClipIds;
+  const selected = findLogicalSingleClip(timeline, selectedClipIds);
+  if (!selected) return null;
   for (const track of timeline.tracks) {
     if (track.type === "audio") continue;
     for (const c of track.clips) {
-      if (c.id === id) return c;
+      if (c.id === selected.id) return c;
     }
   }
   return null;
@@ -849,20 +880,20 @@ export function findSelectedVisualClip(
  * to crop) and, walking every non-audio track's clips, returns `null` outright
  * if MORE THAN ONE matching (selected, non-text, non-audio-track) clip is
  * found, rather than "first match wins". As with `findSelectedVisualClip`,
- * OpenTake tightens upstream's `!selectedClipIds.isEmpty` to exactly one clip
- * selected total (a strict subset, never wider than upstream).
+ * A linked-audio companion is treated as part of one logical visual selection;
+ * unrelated multi-selection remains rejected.
  */
 export function findCropEditingClip(
   timeline: Timeline,
   selectedClipIds: Set<string> | undefined,
 ): Clip | null {
-  if (!selectedClipIds || selectedClipIds.size !== 1) return null;
-  const [id] = selectedClipIds;
+  const selected = findLogicalSingleClip(timeline, selectedClipIds);
+  if (!selected) return null;
   let match: Clip | null = null;
   for (const track of timeline.tracks) {
     if (track.type === "audio") continue;
     for (const c of track.clips) {
-      if (c.id === id && c.mediaType !== "text") {
+      if (c.id === selected.id && c.mediaType !== "text") {
         if (match !== null) return null;
         match = c;
       }
diff --git a/web/src/lib/effects.ts b/web/src/lib/effects.ts
new file mode 100644
index 00000000..d8014988
--- /dev/null
+++ b/web/src/lib/effects.ts
@@ -0,0 +1,17 @@
+import type { Effect } from "./types";
+
+export const EFFECT_REGISTRY = [
+  { name: "grayscale", labelKey: "inspector.effects.grayscale" },
+  { name: "sepia", labelKey: "inspector.effects.sepia" },
+  { name: "invert", labelKey: "inspector.effects.invert" },
+] as const;
+
+export type AdvertisedEffectName = (typeof EFFECT_REGISTRY)[number]["name"];
+
+export function isAdvertisedEffectName(name: string): name is AdvertisedEffectName {
+  return EFFECT_REGISTRY.some((effect) => effect.name === name);
+}
+
+export function newAdvertisedEffect(name: AdvertisedEffectName): Effect {
+  return { name, params: {}, enabled: true };
+}
diff --git a/web/src/lib/fallback.test.ts b/web/src/lib/fallback.test.ts
index 229f648a..6461744c 100644
--- a/web/src/lib/fallback.test.ts
+++ b/web/src/lib/fallback.test.ts
@@ -319,7 +319,7 @@ describe("browser fallback edit store", () => {
     const result = fallback.editApply({
       type: "setEffects",
       clipIds: ["c1", "missing"],
-      effects: [{ name: "gaussianBlur", params: { radius: 4 }, enabled: true }],
+      effects: [{ name: "grayscale", params: { amount: 0.4 }, enabled: true }],
     });
     const clip = fallback
       .getTimeline()
@@ -330,6 +330,163 @@ describe("browser fallback edit store", () => {
     expect(clip?.effects).toBeUndefined();
   });
 
+  it("rejects an invalid color grade before browser fallback mutation", () => {
+    const fallback = createFallbackStore();
+
+    const result = fallback.editApply({
+      type: "setColorGrade",
+      clipIds: ["c1"],
+      grade: { liftGammaGain: { gamma: { r: 0, g: 1, b: 1 } } },
+    });
+    const clip = fallback
+      .getTimeline()
+      .timeline.tracks.flatMap((track) => track.clips)
+      .find((candidate) => candidate.id === "c1");
+
+    expect(result.changed).toBe(false);
+    expect(clip?.colorGrade).toBeUndefined();
+  });
+
+  it("normalizes and validates HSL secondary authored state", () => {
+    const fallback = createFallbackStore();
+    const applied = fallback.editApply({
+      type: "setColorGrade",
+      clipIds: ["c1"],
+      grade: { hslSecondary: { hueCenter: 0.98, hueShift: 0.2 } },
+    });
+    const clip = fallback
+      .getTimeline()
+      .timeline.tracks.flatMap((track) => track.clips)
+      .find((candidate) => candidate.id === "c1");
+    expect(applied.changed).toBe(true);
+    expect(clip?.colorGrade?.hslSecondary).toEqual({
+      hueCenter: 0.98,
+      hueWidth: 0.24,
+      feather: 0.08,
+      hueShift: 0.2,
+      saturation: 0,
+      lightness: 0,
+    });
+
+    const rejected = fallback.editApply({
+      type: "setColorGrade",
+      clipIds: ["c1"],
+      grade: { hslSecondary: { hueWidth: 0 } },
+    });
+    expect(rejected.changed).toBe(false);
+    expect(clip?.colorGrade?.hslSecondary?.hueCenter).toBe(0.98);
+  });
+
+  it("sets, adjusts, and removes a path-free managed LUT reference", () => {
+    const fallback = createFallbackStore();
+    const id = "0123456789abcdef".repeat(4);
+    const applied = fallback.editApply({
+      type: "setLut",
+      clipIds: ["c1"],
+      lut: { id, name: "Known Transform", intensity: 1 },
+    });
+    expect(applied.changed).toBe(true);
+    expect(fallback.getTimeline().timeline.tracks[0].clips[0].lut).toEqual({
+      id,
+      name: "Known Transform",
+      intensity: 1,
+    });
+
+    expect(
+      fallback.editApply({
+        type: "setLut",
+        clipIds: ["c1"],
+        lut: { id, name: "Known Transform", intensity: 1.5 },
+      }).changed,
+    ).toBe(false);
+    expect(
+      fallback.editApply({
+        type: "setLut",
+        clipIds: ["c1"],
+        lut: { id, name: "bad\u0000name", intensity: 0.5 },
+      }).changed,
+    ).toBe(false);
+    expect(
+      fallback.editApply({
+        type: "setLut",
+        clipIds: ["c1"],
+        lut: { id, name: "界".repeat(43), intensity: 0.5 },
+      }).changed,
+    ).toBe(false);
+    expect(fallback.editApply({ type: "setLut", clipIds: ["c1"], lut: null }).changed).toBe(true);
+    expect(fallback.getTimeline().timeline.tracks[0].clips[0].lut).toBeUndefined();
+  });
+
+  it("stores both pair ids and rejects an oversized adjacent cross dissolve", () => {
+    const fallback = createFallbackStore();
+    fallback.reset();
+    fallback.editApply({ type: "insertTrack", kind: "video" });
+    const first = fallback.editApply({
+      type: "addClips",
+      entries: [{ mediaRef: "a", mediaType: "video", sourceClipType: "video", trackIndex: 0, startFrame: 0, durationFrames: 60 }],
+    }).affectedClipIds[0];
+    const second = fallback.editApply({
+      type: "addClips",
+      entries: [{ mediaRef: "b", mediaType: "video", sourceClipType: "video", trackIndex: 0, startFrame: 60, durationFrames: 30 }],
+    }).affectedClipIds[0];
+
+    const result = fallback.editApply({
+      type: "setTransition",
+      fromClipId: first,
+      toClipId: second,
+      kind: "crossDissolve",
+      durationFrames: 15,
+    });
+
+    expect(result.changed).toBe(true);
+    expect(fallback.getTimeline().timeline.tracks[0].clips[0].transitionOut).toEqual({
+      fromClipId: first,
+      toClipId: second,
+      kind: "crossDissolve",
+      durationFrames: 15,
+    });
+    expect(fallback.editApply({
+      type: "setTransition",
+      fromClipId: first,
+      toClipId: second,
+      kind: "crossDissolve",
+      durationFrames: 16,
+    }).changed).toBe(false);
+  });
+
+  it("rejects an invalid or non-successor fallback transition", () => {
+    const fallback = createFallbackStore();
+    fallback.reset();
+    fallback.editApply({ type: "insertTrack", kind: "video" });
+    const first = fallback.editApply({
+      type: "addClips",
+      entries: [{ mediaRef: "a", mediaType: "video", sourceClipType: "video", trackIndex: 0, startFrame: 0, durationFrames: 60 }],
+    }).affectedClipIds[0];
+    const blocker = fallback.editApply({
+      type: "addClips",
+      entries: [{ mediaRef: "b", mediaType: "video", sourceClipType: "video", trackIndex: 0, startFrame: 30, durationFrames: 30 }],
+    }).affectedClipIds[0];
+    const successor = fallback.editApply({
+      type: "addClips",
+      entries: [{ mediaRef: "c", mediaType: "video", sourceClipType: "video", trackIndex: 0, startFrame: 60, durationFrames: 30 }],
+    }).affectedClipIds[0];
+
+    expect(fallback.editApply({
+      type: "setTransition",
+      fromClipId: first,
+      toClipId: successor,
+      kind: "crossDissolve",
+      durationFrames: 15,
+    }).changed).toBe(false);
+    expect(fallback.editApply({
+      type: "setTransition",
+      fromClipId: blocker,
+      toClipId: successor,
+      kind: "crossDissolve",
+      durationFrames: 0,
+    }).changed).toBe(false);
+  });
+
   it("does not emulate swapMedia without the Tauri media manifest", () => {
     const fallback = createFallbackStore();
 
diff --git a/web/src/lib/fallback.ts b/web/src/lib/fallback.ts
index 50d14b79..4bdcef45 100644
--- a/web/src/lib/fallback.ts
+++ b/web/src/lib/fallback.ts
@@ -56,9 +56,43 @@ function normalizeColorGrade(
     },
     contrast: grade.contrast ?? 0,
     saturation: grade.saturation ?? 1,
+    hslSecondary: grade.hslSecondary
+      ? {
+          hueCenter: grade.hslSecondary.hueCenter ?? 0,
+          hueWidth: grade.hslSecondary.hueWidth ?? 0.24,
+          feather: grade.hslSecondary.feather ?? 0.08,
+          hueShift: grade.hslSecondary.hueShift ?? 0,
+          saturation: grade.hslSecondary.saturation ?? 0,
+          lightness: grade.hslSecondary.lightness ?? 0,
+        }
+      : undefined,
   };
 }
 
+function isValidColorGrade(grade: NonNullable<Clip["colorGrade"]>): boolean {
+  const finiteRange = (value: number, min: number, max: number) =>
+    Number.isFinite(value) && value >= min && value <= max;
+  const { lift, gamma, gain } = grade.liftGammaGain;
+  const secondary = grade.hslSecondary;
+  return (
+    finiteRange(grade.exposure, -5, 5) &&
+    finiteRange(grade.temperature, -1, 1) &&
+    finiteRange(grade.tint, -1, 1) &&
+    [lift.r, lift.g, lift.b].every((value) => finiteRange(value, -1, 1)) &&
+    [gamma.r, gamma.g, gamma.b].every((value) => Number.isFinite(value) && value > 0 && value <= 4) &&
+    [gain.r, gain.g, gain.b].every((value) => finiteRange(value, 0, 4)) &&
+    finiteRange(grade.contrast, -1, 2) &&
+    finiteRange(grade.saturation, 0, 3) &&
+    (secondary == null ||
+      (finiteRange(secondary.hueCenter, 0, 1) &&
+        Number.isFinite(secondary.hueWidth) && secondary.hueWidth > 0 && secondary.hueWidth <= 1 &&
+        finiteRange(secondary.feather, 0, 0.5) &&
+        finiteRange(secondary.hueShift, -0.5, 0.5) &&
+        finiteRange(secondary.saturation, -1, 1) &&
+        finiteRange(secondary.lightness, -1, 1)))
+  );
+}
+
 function normalizeChromaKey(
   chromaKey: Extract<EditRequest, { type: "setChromaKey" }>["chromaKey"],
 ): NonNullable<Clip["chromaKey"]> | undefined {
@@ -80,6 +114,11 @@ function normalizeMask(mask: Extract<EditRequest, { type: "setMasks" }>["masks"]
     },
     feather: mask.feather ?? 0,
     invert: mask.invert ?? false,
+    transform: mask.transform ?? {
+      offset: { x: 0, y: 0 },
+      scale: { x: 1, y: 1 },
+      rotationDegrees: 0,
+    },
   };
 }
 
@@ -491,6 +530,7 @@ export function createFallbackStore() {
             return result(false, "Split Clip", []);
           const rightDur = clip.startFrame + clip.durationFrames - cmd.atFrame;
           clip.durationFrames = cmd.atFrame - clip.startFrame;
+          delete clip.loudnessNormalization;
           const right = newClip(nextId(), clip.mediaRef, clip.mediaType, cmd.atFrame, rightDur);
           timeline.tracks[ti].clips.splice(ci + 1, 0, right);
           return result(true, "Split Clip", [right.id]);
@@ -502,6 +542,15 @@ export function createFallbackStore() {
             if (!loc) continue;
             const c = timeline.tracks[loc[0]].clips[loc[1]];
             const p = cmd.properties;
+            if (
+              p.durationFrames !== undefined ||
+              p.trimStartFrame !== undefined ||
+              p.trimEndFrame !== undefined ||
+              p.speed !== undefined ||
+              p.reversed !== undefined
+            ) {
+              delete c.loudnessNormalization;
+            }
             if (p.opacity !== undefined) (c.opacity = p.opacity), (changed = true);
             if (p.volume !== undefined) (c.volume = p.volume), (changed = true);
             if (p.speed !== undefined) (c.speed = p.speed), (changed = true);
@@ -522,6 +571,9 @@ export function createFallbackStore() {
           const locations = findAllClips(cmd.clipIds);
           if (!locations) return result(false, "Set Color Grade", []);
           const next = normalizeColorGrade(cmd.grade);
+          if (next && !isValidColorGrade(next)) {
+            return result(false, "Set Color Grade", []);
+          }
           let changed = false;
           for (const loc of locations) {
             const clip = timeline.tracks[loc[0]].clips[loc[1]];
@@ -532,6 +584,33 @@ export function createFallbackStore() {
           }
           return result(changed, "Set Color Grade", cmd.clipIds);
         }
+        case "setLut": {
+          const locations = findAllClips(cmd.clipIds);
+          if (!locations) return result(false, "Set LUT", []);
+          const next = cmd.lut ?? undefined;
+          const nameBytes = next ? new TextEncoder().encode(next.name).length : 0;
+          if (
+            next &&
+            (!/^[0-9a-f]{64}$/.test(next.id) ||
+              nameBytes < 1 ||
+              nameBytes > 128 ||
+              /\p{Cc}/u.test(next.name) ||
+              !Number.isFinite(next.intensity) ||
+              next.intensity < 0 ||
+              next.intensity > 1)
+          ) {
+            return result(false, "Set LUT", []);
+          }
+          let changed = false;
+          for (const loc of locations) {
+            const clip = timeline.tracks[loc[0]].clips[loc[1]];
+            if (JSON.stringify(clip.lut) !== JSON.stringify(next)) {
+              clip.lut = next ? { ...next } : undefined;
+              changed = true;
+            }
+          }
+          return result(changed, "Set LUT", cmd.clipIds);
+        }
         case "setChromaKey": {
           const locations = findAllClips(cmd.clipIds);
           if (!locations) return result(false, "Set Chroma Key", []);
@@ -574,6 +653,112 @@ export function createFallbackStore() {
           }
           return result(changed, "Set Effects", cmd.clipIds);
         }
+        case "setLoudnessNormalization": {
+          const loc = findClip(cmd.clipId);
+          if (!loc) return result(false, "Normalize Loudness", []);
+          const clip = timeline.tracks[loc[0]].clips[loc[1]];
+          const next = cmd.normalization ?? undefined;
+          if (JSON.stringify(clip.loudnessNormalization) === JSON.stringify(next)) {
+            return result(false, next ? "Normalize Loudness" : "Reset Loudness", []);
+          }
+          clip.loudnessNormalization = next;
+          return result(true, next ? "Normalize Loudness" : "Reset Loudness", [cmd.clipId]);
+        }
+        case "setAudioDenoise": {
+          const loc = findClip(cmd.clipId);
+          if (!loc) return result(false, "Apply Audio Denoise", []);
+          const clip = timeline.tracks[loc[0]].clips[loc[1]];
+          const next = cmd.denoise ?? undefined;
+          if (JSON.stringify(clip.audioDenoise) === JSON.stringify(next)) {
+            return result(false, next ? "Apply Audio Denoise" : "Reset Audio Denoise", []);
+          }
+          clip.audioDenoise = next ? structuredClone(next) : undefined;
+          return result(
+            true,
+            next ? "Apply Audio Denoise" : "Reset Audio Denoise",
+            [cmd.clipId],
+          );
+        }
+        case "applyStabilization": {
+          const loc = findClip(cmd.clipId);
+          if (!loc) return result(false, "Apply Stabilization", []);
+          const clip = timeline.tracks[loc[0]].clips[loc[1]];
+          if (clip.mediaType !== "video" || cmd.solution.sourceIdentity !== clip.mediaRef) {
+            return result(false, "Apply Stabilization", []);
+          }
+          clip.stabilization = structuredClone(cmd.solution);
+          return result(true, "Apply Stabilization", [cmd.clipId]);
+        }
+        case "adjustStabilization": {
+          const loc = findClip(cmd.clipId);
+          if (!loc) return result(false, "Adjust Stabilization", []);
+          const clip = timeline.tracks[loc[0]].clips[loc[1]];
+          if (!clip.stabilization) return result(false, "Adjust Stabilization", []);
+          if (cmd.strength !== undefined) clip.stabilization.strength = cmd.strength;
+          if (cmd.cropMargin !== undefined) clip.stabilization.cropMargin = cmd.cropMargin;
+          return result(true, "Adjust Stabilization", [cmd.clipId]);
+        }
+        case "resetStabilization": {
+          const loc = findClip(cmd.clipId);
+          if (!loc) return result(false, "Reset Stabilization", []);
+          const clip = timeline.tracks[loc[0]].clips[loc[1]];
+          if (!clip.stabilization) return result(false, "Reset Stabilization", []);
+          delete clip.stabilization;
+          return result(true, "Reset Stabilization", [cmd.clipId]);
+        }
+        case "setTransition": {
+          const fromLocation = findClip(cmd.fromClipId);
+          if (!fromLocation) return result(false, "Set Transition", []);
+          const from = timeline.tracks[fromLocation[0]].clips[fromLocation[1]];
+          if (cmd.kind == null) {
+            if (
+              from.transitionOut?.toClipId !== cmd.toClipId ||
+              (from.transitionOut.fromClipId !== undefined &&
+                from.transitionOut.fromClipId !== cmd.fromClipId)
+            ) {
+              return result(false, "Remove Transition", []);
+            }
+            delete from.transitionOut;
+            return result(true, "Remove Transition", [cmd.fromClipId, cmd.toClipId]);
+          }
+          const toLocation = findClip(cmd.toClipId);
+          if (!toLocation || toLocation[0] !== fromLocation[0]) {
+            return result(false, "Set Transition", []);
+          }
+          const track = timeline.tracks[fromLocation[0]];
+          const to = timeline.tracks[toLocation[0]].clips[toLocation[1]];
+          const ordered = track.clips
+            .slice()
+            .sort((left, right) => left.startFrame - right.startFrame || left.id.localeCompare(right.id));
+          const fromIndex = ordered.findIndex((clip) => clip.id === from.id);
+          if (
+            cmd.durationFrames < 1 ||
+            track.type === "audio" ||
+            from.mediaType === "audio" ||
+            from.mediaType === "text" ||
+            to.mediaType === "audio" ||
+            to.mediaType === "text" ||
+            from.startFrame + from.durationFrames !== to.startFrame ||
+            ordered[fromIndex + 1]?.id !== to.id
+          ) {
+            return result(false, "Set Transition", []);
+          }
+          const maximum = Math.max(1, Math.floor(Math.min(from.durationFrames, to.durationFrames) / 2));
+          if (cmd.durationFrames > maximum) {
+            return result(false, "Set Transition", []);
+          }
+          const next = {
+            fromClipId: from.id,
+            toClipId: to.id,
+            kind: cmd.kind,
+            durationFrames: cmd.durationFrames,
+          };
+          if (JSON.stringify(from.transitionOut) === JSON.stringify(next)) {
+            return result(false, "Set Transition", []);
+          }
+          from.transitionOut = next;
+          return result(true, "Set Transition", [cmd.fromClipId, cmd.toClipId]);
+        }
         case "swapMedia": {
           return result(false, "Swap Media", []);
         }
diff --git a/web/src/lib/projectSettings.test.ts b/web/src/lib/projectSettings.test.ts
new file mode 100644
index 00000000..9720f777
--- /dev/null
+++ b/web/src/lib/projectSettings.test.ts
@@ -0,0 +1,105 @@
+import { describe, expect, it } from "vitest";
+import type { MediaItem, Timeline } from "./types";
+import { checkProjectSettings } from "./projectSettings";
+
+function timeline(overrides: Partial<Timeline> = {}): Timeline {
+  return {
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    settingsConfigured: false,
+    tracks: [],
+    ...overrides,
+  };
+}
+
+function media(overrides: Partial<MediaItem> = {}): MediaItem {
+  return {
+    id: "video",
+    name: "video.mp4",
+    type: "video",
+    duration: 5,
+    width: 3840,
+    height: 2160,
+    sourceFps: 23.976,
+    hasAudio: true,
+    favorite: false,
+    ...overrides,
+  };
+}
+
+describe("checkProjectSettings", () => {
+  it("first_video_auto_configures_and_only_configured_empty_mismatch_prompts", () => {
+    expect(checkProjectSettings(timeline(), [media({ type: "audio" })])).toEqual({
+      kind: "proceed",
+    });
+
+    expect(checkProjectSettings(timeline(), [media()])).toEqual({
+      kind: "apply",
+      settings: { fps: 24, width: 3840, height: 2160 },
+    });
+
+    const occupied = timeline({
+      settingsConfigured: true,
+      tracks: [
+        {
+          id: "track",
+          type: "video",
+          muted: false,
+          hidden: false,
+          syncLocked: true,
+          clips: [
+            {
+              id: "clip",
+              mediaRef: "old",
+              mediaType: "video",
+              sourceClipType: "video",
+              startFrame: 0,
+              durationFrames: 30,
+              trimStartFrame: 0,
+              trimEndFrame: 0,
+              speed: 1,
+              volume: 1,
+              fadeInFrames: 0,
+              fadeOutFrames: 0,
+              fadeInInterpolation: "linear",
+              fadeOutInterpolation: "linear",
+              opacity: 1,
+              transform: {
+                centerX: 0.5,
+                centerY: 0.5,
+                width: 1,
+                height: 1,
+                rotation: 0,
+                flipHorizontal: false,
+                flipVertical: false,
+              },
+              crop: { left: 0, top: 0, right: 0, bottom: 0 },
+            },
+          ],
+        },
+      ],
+    });
+    expect(checkProjectSettings(occupied, [media()])).toEqual({ kind: "proceed" });
+
+    const configuredEmpty = timeline({ settingsConfigured: true });
+    expect(
+      checkProjectSettings(configuredEmpty, [
+        media({ sourceFps: 30, width: 1920, height: 1080 }),
+      ]),
+    ).toEqual({ kind: "proceed" });
+    expect(checkProjectSettings(configuredEmpty, [media()])).toEqual({
+      kind: "prompt",
+      settings: { fps: 24, width: 3840, height: 2160 },
+    });
+
+    expect(
+      checkProjectSettings(timeline(), [
+        media({ sourceFps: null, width: null, height: null }),
+      ]),
+    ).toEqual({
+      kind: "apply",
+      settings: { fps: 30, width: 1920, height: 1080 },
+    });
+  });
+});
diff --git a/web/src/lib/projectSettings.ts b/web/src/lib/projectSettings.ts
new file mode 100644
index 00000000..69b25d31
--- /dev/null
+++ b/web/src/lib/projectSettings.ts
@@ -0,0 +1,47 @@
+import type { MediaItem, Timeline } from "./types";
+
+export interface ProjectSettingsTarget {
+  fps: number;
+  width: number;
+  height: number;
+}
+
+export type ProjectSettingsDecision =
+  | { kind: "proceed" }
+  | { kind: "apply"; settings: ProjectSettingsTarget }
+  | { kind: "prompt"; settings: ProjectSettingsTarget };
+
+function positiveFinite(value: number | null | undefined): value is number {
+  return typeof value === "number" && Number.isFinite(value) && value > 0;
+}
+
+function targetForVideo(timeline: Timeline, video: MediaItem): ProjectSettingsTarget {
+  return {
+    fps: positiveFinite(video.sourceFps) ? Math.max(1, Math.round(video.sourceFps)) : timeline.fps,
+    width: positiveFinite(video.width) ? Math.round(video.width) : timeline.width,
+    height: positiveFinite(video.height) ? Math.round(video.height) : timeline.height,
+  };
+}
+
+/** Pure port of the upstream first-video settings decision. It intentionally
+ * does not prompt once timeline content exists: changing FPS then would rescale
+ * edits and interrupt normal imports. */
+export function checkProjectSettings(
+  timeline: Timeline,
+  assets: readonly MediaItem[],
+): ProjectSettingsDecision {
+  const video = assets.find((asset) => asset.type === "video");
+  if (!video) return { kind: "proceed" };
+
+  const settings = targetForVideo(timeline, video);
+  if (!timeline.settingsConfigured) return { kind: "apply", settings };
+
+  const hasTimelineContent = timeline.tracks.some((track) => track.clips.length > 0);
+  if (hasTimelineContent) return { kind: "proceed" };
+
+  const fpsMismatch = positiveFinite(video.sourceFps) && settings.fps !== timeline.fps;
+  const resolutionMismatch =
+    (positiveFinite(video.width) && settings.width !== timeline.width) ||
+    (positiveFinite(video.height) && settings.height !== timeline.height);
+  return fpsMismatch || resolutionMismatch ? { kind: "prompt", settings } : { kind: "proceed" };
+}
diff --git a/web/src/lib/theme.contract.test.ts b/web/src/lib/theme.contract.test.ts
new file mode 100644
index 00000000..606e7e71
--- /dev/null
+++ b/web/src/lib/theme.contract.test.ts
@@ -0,0 +1,119 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+import {
+  ACCENT,
+  ANIM,
+  BG,
+  BORDER,
+  BORDER_WIDTH,
+  FS,
+  FONT_WEIGHT,
+  ICON_SIZE,
+  LAYOUT,
+  OPACITY,
+  RADIUS,
+  SHADOW,
+  SPACE,
+  TEXT,
+  TRACK_COLOR,
+  TRACKING,
+} from "./theme";
+
+const cssSource = readFileSync(new URL("../styles/tokens.css", import.meta.url), "utf8");
+
+function cssToken(name: string): string | undefined {
+  const escaped = name.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+  return cssSource.match(new RegExp(`--${escaped}\\s*:\\s*([^;]+);`))?.[1]
+    ?.replace(/\s+/g, " ")
+    .replace(/\s*,\s*/g, ",")
+    .trim();
+}
+
+describe("design-token contract", () => {
+  it("complete_upstream_token_table_and_css_projection", () => {
+    expect(BG).toEqual({
+      base: "rgb(10,10,10)", surface: "rgb(22,22,22)", raised: "rgb(30,30,30)",
+      prominent: "rgb(44,44,44)", placeholder: "rgb(30,30,30)", previewCanvas: "#000",
+    });
+    expect(BORDER).toEqual({
+      primary: "rgba(255,255,255,0.16)", subtle: "rgba(255,255,255,0.12)",
+      divider: "rgba(255,255,255,0.44)",
+    });
+    expect(BORDER_WIDTH).toEqual({ hairline: 0.5, thin: 1, medium: 1.5, thick: 2 });
+    expect(TEXT).toEqual({
+      primary: "rgba(255,255,255,1)", secondary: "rgba(255,255,255,0.8)",
+      tertiary: "rgba(255,255,255,0.62)", muted: "rgba(255,255,255,0.34)",
+    });
+    expect(ACCENT).toMatchObject({
+      timecode: "rgb(242,153,51)", primary: "rgb(245,239,228)",
+      spotlight: "rgb(255,69,69)", error: "rgb(229,79,79)",
+      glassTint: "rgba(245,239,228,0.05)",
+    });
+    expect(TRACK_COLOR).toEqual({
+      video: "rgb(0,145,194)", audio: "rgb(88,168,34)",
+      image: "rgb(183,45,210)", text: "rgb(183,45,210)", lottie: "rgb(224,168,0)",
+    });
+    expect(RADIUS).toEqual({ xs: 3, xsSm: 4, sm: 6, md: 10, mdLg: 12, lg: 14, xl: 20 });
+    expect(SPACE).toEqual({ xxs: 2, xs: 4, sm: 6, smMd: 8, md: 10, mdLg: 12, lg: 14, lgXl: 16, xl: 20, xlXxl: 24, xxl: 28 });
+    expect(FS).toEqual({ micro: 8, xxs: 9, xs: 10, sm: 11, smMd: 12, md: 13, mdLg: 14, lg: 15, xl: 18, title1: 22, title2: 28, display: 36 });
+    expect(FONT_WEIGHT).toEqual({ light: 300, regular: 400, medium: 500, semibold: 600, bold: 700 });
+    expect(TRACKING).toEqual({ tight: -0.5, normal: 0, wide: 1.5 });
+    expect(ICON_SIZE).toEqual({ xxs: 12, xs: 14, sm: 18, smMd: 20, md: 22, mdLg: 24, lg: 26, lgXl: 28, xl: 30 });
+    expect(OPACITY).toEqual({ opaque: 1, subtle: 0.04, hint: 0.06, faint: 0.08, soft: 0.1, muted: 0.15, moderate: 0.25, medium: 0.35, strong: 0.55, prominent: 0.8 });
+    expect(SHADOW).toEqual({ sm: "0 0.5px 1px rgba(0,0,0,0.3)", md: "0 2px 4px rgba(0,0,0,0.3)", lg: "0 8px 24px rgba(0,0,0,0.25)" });
+    expect(ANIM).toEqual({ hoverMs: 150, transitionMs: 200 });
+    expect(LAYOUT).toMatchObject({
+      panelHeaderHeight: 28, toolbarHeight: 38, panelGap: 5, tabRailWidth: 38,
+      contextRowHeight: 22, projectCardWidth: 150, projectCardHeight: 120,
+      captionPreviewMaxHeight: 150, toolImagePreviewMaxHeight: 50,
+      captionDefaultFontSize: 48, captionMinFontSize: 12, captionMaxFontSize: 300,
+      captionCenterSnapThreshold: 0.02, captionDefaultCenterY: 0.9,
+      generationReferenceTileWidth: 80, generationReferenceTileHeight: 56,
+      keyframeRowHeight: 22, keyframeRulerHeight: 18, keyframeStripHeight: 14,
+      keyframeHeaderHeight: 32, keyframeDiamondSize: 8,
+    });
+
+    const cssProjection: Record<string, string> = {
+      "bg-base": "rgb(10,10,10)", "bg-surface": "rgb(22,22,22)",
+      "bg-raised": "rgb(30,30,30)", "bg-prominent": "rgb(44,44,44)",
+      "bg-placeholder": "rgb(30,30,30)", "bg-preview-canvas": "#000",
+      "border-primary": "rgba(255,255,255,0.16)", "border-subtle": "rgba(255,255,255,0.12)",
+      "border-divider": "rgba(255,255,255,0.44)", "bw-hairline": "0.5px",
+      "bw-thin": "1px", "bw-medium": "1.5px", "bw-thick": "2px",
+      "text-primary": "rgba(255,255,255,1)", "text-secondary": "rgba(255,255,255,0.8)",
+      "text-tertiary": "rgba(255,255,255,0.62)", "text-muted": "rgba(255,255,255,0.34)",
+      "accent-timecode": "rgb(242,153,51)", "accent-primary": "rgb(245,239,228)",
+      "accent-spotlight": "rgb(255,69,69)", "status-error": "rgb(229,79,79)",
+      "glass-tint": "rgba(245,239,228,0.05)",
+      "track-video": "rgb(0,145,194)", "track-audio": "rgb(88,168,34)",
+      "track-image": "rgb(183,45,210)", "track-text": "rgb(183,45,210)", "track-lottie": "rgb(224,168,0)",
+      "radius-xs": "3px", "radius-xs-sm": "4px", "radius-sm": "6px", "radius-md": "10px",
+      "radius-md-lg": "12px", "radius-lg": "14px", "radius-xl": "20px",
+      "space-xxs": "2px", "space-xs": "4px", "space-sm": "6px", "space-sm-md": "8px",
+      "space-md": "10px", "space-md-lg": "12px", "space-lg": "14px", "space-lg-xl": "16px",
+      "space-xl": "20px", "space-xl-xxl": "24px", "space-xxl": "28px",
+      "fs-micro": "8px", "fs-xxs": "9px", "fs-xs": "10px", "fs-sm": "11px",
+      "fs-sm-md": "12px", "fs-md": "13px", "fs-md-lg": "14px", "fs-lg": "15px",
+      "fs-xl": "18px", "fs-title1": "22px", "fs-title2": "28px", "fs-display": "36px",
+      "fw-light": "300", "fw-regular": "400", "fw-medium": "500", "fw-semibold": "600", "fw-bold": "700",
+      "tracking-tight": "-0.5px", "tracking-normal": "0", "tracking-wide": "1.5px",
+      "icon-xxs": "12px", "icon-xs": "14px", "icon-sm": "18px", "icon-sm-md": "20px",
+      "icon-md": "22px", "icon-md-lg": "24px", "icon-lg": "26px", "icon-lg-xl": "28px", "icon-xl": "30px",
+      "op-opaque": "1", "op-subtle": "0.04", "op-hint": "0.06", "op-faint": "0.08", "op-soft": "0.1",
+      "op-muted": "0.15", "op-moderate": "0.25", "op-medium": "0.35", "op-strong": "0.55", "op-prominent": "0.8",
+      "shadow-sm": "0 0.5px 1px rgba(0,0,0,0.3)", "shadow-md": "0 2px 4px rgba(0,0,0,0.3)",
+      "shadow-lg": "0 8px 24px rgba(0,0,0,0.25)", "anim-hover": "150ms", "anim-transition": "200ms",
+      "panel-header-height": "28px", "toolbar-height": "38px", "panel-gap": "5px", "tab-rail-width": "38px",
+      "context-row-height": "22px", "project-card-width": "150px", "project-card-height": "120px",
+      "caption-preview-max-height": "150px", "tool-image-preview-max-height": "50px",
+      "caption-default-font-size": "48px", "caption-min-font-size": "12px", "caption-max-font-size": "300px",
+      "caption-center-snap-threshold": "0.02", "caption-default-center-y": "0.9",
+      "generation-reference-tile-width": "80px", "generation-reference-tile-height": "56px",
+      "keyframe-row-height": "22px", "keyframe-ruler-height": "18px", "keyframe-strip-height": "14px",
+      "keyframe-header-height": "32px", "keyframe-diamond-size": "8px",
+    };
+    for (const [name, expected] of Object.entries(cssProjection)) {
+      expect(cssToken(name), `--${name}`).toBe(expected);
+    }
+  });
+});
diff --git a/web/src/lib/theme.ts b/web/src/lib/theme.ts
index e7a15696..a08d1a1f 100644
--- a/web/src/lib/theme.ts
+++ b/web/src/lib/theme.ts
@@ -10,6 +10,7 @@ export const BG = {
   surface: "rgb(22,22,22)",
   raised: "rgb(30,30,30)",
   prominent: "rgb(44,44,44)",
+  placeholder: "rgb(30,30,30)",
   previewCanvas: "#000",
 } as const;
 
@@ -20,6 +21,13 @@ export const BORDER = {
   divider: "rgba(255,255,255,0.44)",
 } as const;
 
+export const BORDER_WIDTH = {
+  hairline: 0.5,
+  thin: 1,
+  medium: 1.5,
+  thick: 2,
+} as const;
+
 /** §1.3 Text colors. */
 export const TEXT = {
   primary: "rgba(255,255,255,1)",
@@ -32,7 +40,9 @@ export const TEXT = {
 export const ACCENT = {
   timecode: "rgb(242,153,51)",
   primary: "rgb(245,239,228)",
+  spotlight: "rgb(255,69,69)",
   error: "rgb(229,79,79)",
+  glassTint: "rgba(245,239,228,0.05)",
   // System colors upstream uses directly in the timeline.
   systemRed: "rgb(255,59,48)",
   systemYellow: "rgb(255,204,0)",
@@ -41,13 +51,13 @@ export const ACCENT = {
 } as const;
 
 /** §1.5 Track colors keyed by ClipType. */
-export const TRACK_COLOR: Record<string, string> = {
+export const TRACK_COLOR = {
   video: "rgb(0,145,194)",
   audio: "rgb(88,168,34)",
   image: "rgb(183,45,210)",
   text: "rgb(183,45,210)",
   lottie: "rgb(224,168,0)",
-};
+} as const;
 
 /** §1.7 Spacing (px). */
 export const SPACE = {
@@ -86,6 +96,59 @@ export const FS = {
   mdLg: 14,
   lg: 15,
   xl: 18,
+  title1: 22,
+  title2: 28,
+  display: 36,
+} as const;
+
+export const FONT_WEIGHT = {
+  light: 300,
+  regular: 400,
+  medium: 500,
+  semibold: 600,
+  bold: 700,
+} as const;
+
+export const TRACKING = {
+  tight: -0.5,
+  normal: 0,
+  wide: 1.5,
+} as const;
+
+export const ICON_SIZE = {
+  xxs: 12,
+  xs: 14,
+  sm: 18,
+  smMd: 20,
+  md: 22,
+  mdLg: 24,
+  lg: 26,
+  lgXl: 28,
+  xl: 30,
+} as const;
+
+export const OPACITY = {
+  opaque: 1,
+  subtle: 0.04,
+  hint: 0.06,
+  faint: 0.08,
+  soft: 0.1,
+  muted: 0.15,
+  moderate: 0.25,
+  medium: 0.35,
+  strong: 0.55,
+  prominent: 0.8,
+} as const;
+
+export const SHADOW = {
+  sm: "0 0.5px 1px rgba(0,0,0,0.3)",
+  md: "0 2px 4px rgba(0,0,0,0.3)",
+  lg: "0 8px 24px rgba(0,0,0,0.25)",
+} as const;
+
+export const ANIM = {
+  hoverMs: 150,
+  transitionMs: 200,
 } as const;
 
 export const FONT_UI =
@@ -97,6 +160,27 @@ export const FONT_MONO = 'ui-monospace, "SF Mono", Menlo, Consolas, monospace';
  * upstream literal — do not approximate.
  */
 export const LAYOUT = {
+  panelHeaderHeight: 28,
+  toolbarHeight: 38,
+  panelGap: 5,
+  tabRailWidth: 38,
+  contextRowHeight: 22,
+  projectCardWidth: 150,
+  projectCardHeight: 120,
+  captionPreviewMaxHeight: 150,
+  toolImagePreviewMaxHeight: 50,
+  captionDefaultFontSize: 48,
+  captionMinFontSize: 12,
+  captionMaxFontSize: 300,
+  captionCenterSnapThreshold: 0.02,
+  captionDefaultCenterY: 0.9,
+  generationReferenceTileWidth: 80,
+  generationReferenceTileHeight: 56,
+  keyframeRowHeight: 22,
+  keyframeRulerHeight: 18,
+  keyframeStripHeight: 14,
+  keyframeHeaderHeight: 32,
+  keyframeDiamondSize: 8,
   rulerHeight: 24, // Constants.swift:46
   dropZoneHeight: 60, // :47
   trackHeaderWidth: 100, // :48
diff --git a/web/src/lib/timelineInsert.ts b/web/src/lib/timelineInsert.ts
index 7758f021..ae385118 100644
--- a/web/src/lib/timelineInsert.ts
+++ b/web/src/lib/timelineInsert.ts
@@ -20,8 +20,11 @@ export interface InsertPlan {
 /** Frame length a media item occupies (duplicated tiny rule from editActions to
  *  keep this module import-free of the store; stills get a default length). */
 function durationFramesFor(item: MediaItem, fps: number, defaultImageSeconds: number): number {
-  const seconds = item.duration > 0 ? item.duration : defaultImageSeconds;
-  return Math.max(1, Math.round(seconds * fps));
+  const seconds = Number.isFinite(item.duration) && item.duration > 0
+    ? item.duration
+    : defaultImageSeconds;
+  const frames = seconds * fps;
+  return Number.isFinite(frames) ? Math.max(1, Math.trunc(frames)) : 1;
 }
 
 function isVisual(type: ClipType): boolean {
diff --git a/web/src/lib/types.ts b/web/src/lib/types.ts
index 5f93a599..7448c518 100644
--- a/web/src/lib/types.ts
+++ b/web/src/lib/types.ts
@@ -7,15 +7,62 @@
 
 export type ClipType = "video" | "audio" | "image" | "text" | "lottie";
 export type Interpolation = "linear" | "hold" | "smooth";
+export type TransitionKind = "crossDissolve";
+
+export interface Transition {
+  fromClipId: string;
+  toClipId: string;
+  kind: TransitionKind;
+  durationFrames: number;
+}
 
 export interface Timeline {
   fps: number; // default 30
   width: number; // default 1920
   height: number; // default 1080
   settingsConfigured: boolean;
+  nestedSequences?: NestedSequence[];
+  scriptAssemblyPlans?: ScriptAssemblyPlan[];
+  voiceModels?: VoiceModelRecord[];
   tracks: Track[];
 }
 
+export interface VoiceModelRecord {
+  id: string;
+  provider: string;
+  providerVoiceId: string;
+  model: string;
+  consentId: string;
+  sourceAudioAssetId: string;
+  sourceAudioSha256: string;
+  requestHash: string;
+  voiceName: string;
+  revoked: boolean;
+}
+
+export interface ScriptAssemblySegment {
+  script: string;
+  mediaRef: string;
+  narrationMediaRef?: string;
+  durationFrames: number;
+  transition?: TransitionKind;
+}
+
+export interface ScriptAssemblyPlan {
+  id: string;
+  planHash: string;
+  planner: string;
+  plannerVersion: number;
+  startFrame: number;
+  segments: ScriptAssemblySegment[];
+}
+
+export interface NestedSequence {
+  id: string;
+  name: string;
+  timeline: Timeline;
+}
+
 export interface Track {
   id: string;
   type: ClipType; // serde rename = "type"
@@ -102,6 +149,15 @@ export interface LiftGammaGain {
   gain: Rgb;
 }
 
+export interface HslSecondary {
+  hueCenter: number;
+  hueWidth: number;
+  feather: number;
+  hueShift: number;
+  saturation: number;
+  lightness: number;
+}
+
 export interface ColorGrade {
   exposure: number;
   temperature: number;
@@ -109,6 +165,13 @@ export interface ColorGrade {
   liftGammaGain: LiftGammaGain;
   contrast: number;
   saturation: number;
+  hslSecondary?: HslSecondary;
+}
+
+export interface LutReference {
+  id: string;
+  name: string;
+  intensity: number;
 }
 
 export interface ChromaKey {
@@ -128,10 +191,17 @@ export type MaskShape =
   | { kind: "circle"; center: Point2; radius: Point2 }
   | { kind: "poly"; points: Point2[] };
 
+export interface MaskTransform {
+  offset: Point2;
+  scale: Point2;
+  rotationDegrees: number;
+}
+
 export interface Mask {
   shape: MaskShape;
   feather: number;
   invert: boolean;
+  transform?: MaskTransform;
 }
 
 export interface Effect {
@@ -153,6 +223,29 @@ export interface ColorGradeInput {
   liftGammaGain?: LiftGammaGainInput;
   contrast?: number;
   saturation?: number;
+  hslSecondary?: Partial<HslSecondary>;
+}
+
+export interface ColorMatchInput {
+  referenceMediaRef: string;
+  referenceFrame: number;
+  targetFrame: number;
+  algorithm: string;
+  algorithmVersion: number;
+  targetMeanLinear: Rgb;
+  referenceMeanLinear: Rgb;
+  deltaEBefore: number;
+  deltaEAfter: number;
+  targetLumaBefore: number;
+  targetLumaAfter: number;
+}
+
+export interface CaptionTranslationInput {
+  sourceText: string;
+  sourceLocale: string;
+  targetLocale: string;
+  provider: string;
+  model: string;
 }
 
 export interface ChromaKeyInput {
@@ -166,6 +259,7 @@ export interface MaskInput {
   shape?: MaskShape;
   feather?: number;
   invert?: boolean;
+  transform?: MaskTransform;
 }
 
 export interface EffectInput {
@@ -174,6 +268,40 @@ export interface EffectInput {
   enabled?: boolean;
 }
 
+export interface StabilizationKeyframe {
+  frame: number;
+  translationX: number;
+  translationY: number;
+  rotationDegrees: number;
+}
+
+export interface StabilizationTrack {
+  model: string;
+  modelVersion: number;
+  sourceIdentity: string;
+  strength: number;
+  cropMargin: number;
+  keyframes: StabilizationKeyframe[];
+}
+
+export interface LoudnessNormalization {
+  targetLufs: number;
+  truePeakCeilingDbtp: number;
+  inputIntegratedLufs: number;
+  inputTruePeakDbtp: number;
+  gainDb: number;
+  outputIntegratedLufs: number;
+  outputTruePeakDbtp: number;
+}
+
+export type DenoiseMode = "adaptive" | "voice";
+
+export interface AudioDenoise {
+  mode: DenoiseMode;
+  strength: number;
+  previewEnabled: boolean;
+}
+
 export interface Clip {
   id: string;
   mediaRef: string;
@@ -195,18 +323,26 @@ export interface Clip {
   crop: Crop;
   linkGroupId?: string;
   captionGroupId?: string;
+  nestedSequenceId?: string;
   textContent?: string;
   textStyle?: TextStyle;
+  captionTranslationInput?: CaptionTranslationInput;
   opacityTrack?: KeyframeTrack<number>;
   positionTrack?: KeyframeTrack<AnimPair>;
   scaleTrack?: KeyframeTrack<AnimPair>;
   rotationTrack?: KeyframeTrack<number>;
   cropTrack?: KeyframeTrack<Crop>;
   volumeTrack?: KeyframeTrack<number>;
+  loudnessNormalization?: LoudnessNormalization;
+  audioDenoise?: AudioDenoise;
   colorGrade?: ColorGrade;
+  colorMatchInput?: ColorMatchInput;
+  lut?: LutReference;
   chromaKey?: ChromaKey;
   masks?: Mask[];
   effects?: Effect[];
+  stabilization?: StabilizationTrack;
+  transitionOut?: Transition;
 }
 
 // MARK: - Command DTOs (mirror src-tauri EditRequest)
@@ -301,6 +437,10 @@ export interface FrameRangeReq {
 
 /** The discriminated union mapped to Rust `EditRequest` (tag = "type"). */
 export type EditRequest =
+  | { type: "createNestedSequence"; name: string; clipIds: string[] }
+  | { type: "editNestedSequence"; sequenceId: string; command: EditRequest }
+  | { type: "renameNestedSequence"; sequenceId: string; name: string }
+  | { type: "dissolveNestedSequence"; clipId: string }
   | { type: "addClips"; entries: ClipEntryReq[] }
   | { type: "insertClips"; trackIndex: number; atFrame: number; entries: ClipEntryReq[] }
   | { type: "moveClips"; moves: ClipMoveReq[] }
@@ -328,9 +468,35 @@ export type EditRequest =
   | { type: "moveKeyframe"; clipId: string; property: KeyframeProperty; fromFrame: number; toFrame: number }
   | { type: "setKeyframeInterpolation"; clipId: string; property: KeyframeProperty; frame: number; interpolation: Interpolation }
   | { type: "setColorGrade"; clipIds: string[]; grade?: ColorGradeInput | null }
+  | { type: "setLut"; clipIds: string[]; lut?: LutReference | null }
   | { type: "setChromaKey"; clipIds: string[]; chromaKey?: ChromaKeyInput | null }
   | { type: "setMasks"; clipIds: string[]; masks: MaskInput[] }
   | { type: "setEffects"; clipIds: string[]; effects: EffectInput[] }
+  | {
+      type: "setLoudnessNormalization";
+      clipId: string;
+      normalization?: LoudnessNormalization | null;
+    }
+  | {
+      type: "setAudioDenoise";
+      clipId: string;
+      denoise?: AudioDenoise | null;
+    }
+  | { type: "applyStabilization"; clipId: string; solution: StabilizationTrack }
+  | {
+      type: "adjustStabilization";
+      clipId: string;
+      strength?: number;
+      cropMargin?: number;
+    }
+  | { type: "resetStabilization"; clipId: string }
+  | {
+      type: "setTransition";
+      fromClipId: string;
+      toClipId: string;
+      kind?: TransitionKind | null;
+      durationFrames: number;
+    }
   | { type: "rippleDeleteRanges"; trackIndex: number; ranges: FrameRangeReq[] }
   | { type: "rippleDeleteClips"; clipIds: string[] }
   | { type: "addTexts"; entries: TextEntryReq[] }
@@ -450,6 +616,190 @@ export interface ModelStatus {
   bytes: number;
 }
 
+export interface MattingModelStatus {
+  installed: boolean;
+  model: string;
+  bytes: number;
+  sha256: string;
+}
+
+export interface MotionTrackingRegion {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
+export interface MotionTrackingResult {
+  result: {
+    clipId: string;
+    applied: boolean;
+    algorithm: string;
+    algorithmVersion: number;
+    minimumConfidence: number;
+    region: MotionTrackingRegion;
+    keyframes: Array<{
+      frame: number;
+      position: { x: number; y: number };
+      interpolation: "linear";
+    }>;
+  };
+  actionName?: string | null;
+}
+
+export interface GenerateMatteResult {
+  result: {
+    clipId: string;
+    sourceMediaRef: string;
+    assetId?: string | null;
+    applied: boolean;
+    cacheKey: string;
+    previewPath: string;
+    frameCount: number;
+    width?: number | null;
+    height?: number | null;
+    fps?: number | null;
+    model: string;
+    modelSha256: string;
+    sourceSha256: string;
+    startFrame: number;
+    endFrame: number;
+  };
+  actionName?: string | null;
+}
+
+export interface RemoveObjectResult {
+  result: {
+    clipId: string;
+    sourceMediaRef: string;
+    assetId?: string | null;
+    applied: boolean;
+    cacheKey: string;
+    previewPath: string;
+    frameCount: number;
+    width?: number | null;
+    height?: number | null;
+    fps?: number | null;
+    provider: string;
+    model: string;
+    sourceSha256: string;
+    maskIndex: number;
+    startFrame: number;
+    endFrame: number;
+  };
+  actionName?: string | null;
+}
+
+export interface MatchColorResult {
+  result: {
+    clipId: string;
+    referenceMediaRef: string;
+    referenceFrame: number;
+    targetFrame: number;
+    algorithm: string;
+    algorithmVersion: number;
+    grade: ColorGrade;
+    targetMeanLinear: Rgb;
+    referenceMeanLinear: Rgb;
+    matchedMeanLinear: Rgb;
+    deltaEBefore: number;
+    deltaEAfter: number;
+    targetLumaBefore: number;
+    targetLumaAfter: number;
+    applied: boolean;
+  };
+  actionName?: string | null;
+}
+
+export interface CaptionTranslationReviewChange {
+  id: string;
+  sourceText: string;
+  translatedText: string;
+}
+
+export interface CaptionTranslationResult {
+  result: {
+    projectEpoch: number;
+    version: number;
+    sourceLocale: string;
+    targetLocale: string;
+    provider: string;
+    model: string;
+    review: CaptionTranslationReviewChange[];
+    errors: Array<{ id: string; message: string }>;
+    captionCount: number;
+    translatedCount: number;
+    applied: boolean;
+  };
+  actionName?: string | null;
+}
+
+export interface ScriptToVideoSegmentInput {
+  script: string;
+  mediaRef: string;
+  narrationMediaRef?: string;
+  durationFrames: number;
+  transition?: "crossDissolve";
+}
+
+export interface ScriptToVideoResult {
+  result: {
+    projectEpoch: number;
+    version: number;
+    planId: string;
+    planHash: string;
+    planner: string;
+    plannerVersion: number;
+    startFrame: number;
+    endFrame: number;
+    segments: Array<ScriptToVideoSegmentInput & { startFrame: number }>;
+    applied: boolean;
+  };
+  actionName?: string | null;
+}
+
+export interface AvatarGenerationResult {
+  result: {
+    assetId: string;
+    clipIds: string[];
+    previewPath: string;
+    provider: string;
+    model: string;
+    providerRequestId: string;
+    requestHash: string;
+    consentId: string;
+    portraitMediaRef: string;
+    audioMediaRef: string;
+    durationFrames: number;
+    mediaType: string;
+    imported: boolean;
+  };
+  actionName?: string | null;
+}
+
+export interface VoiceCloneResult {
+  result: {
+    action: "enroll" | "generate" | "revoke";
+    voiceId: string;
+    voiceName?: string;
+    assetId?: string;
+    clipIds?: string[];
+    previewPath?: string;
+    provider: string;
+    model?: string;
+    providerRequestId?: string;
+    requestHash?: string;
+    consentId: string;
+    sourceAudioMediaRef?: string;
+    sourceAudioSha256?: string;
+    durationFrames?: number;
+    mediaType?: string;
+    imported?: boolean;
+    revoked?: boolean;
+  };
+  actionName?: string | null;
+}
+
 /** One transcript word/token with optional source-seconds timing. */
 export interface TranscriptWord {
   text: string;
@@ -574,8 +924,23 @@ export interface MediaItem {
   duration: number;
   width?: number | null;
   height?: number | null;
+  /** Probed source frame rate for first-video project configuration. */
+  sourceFps?: number | null;
   hasAudio: boolean;
+  /** Original video stream color signalling. PQ/HLG is delivered as SDR BT.709
+   *  by the current 8-bit preview/export compositor. */
+  color?: {
+    primaries?: string | null;
+    transfer?: string | null;
+    matrix?: string | null;
+    range?: string | null;
+  } | null;
+  isHdr?: boolean;
   path?: string | null;
+  /** Project-local low-resolution playback media; never used for export. */
+  proxyPath?: string | null;
+  proxyWidth?: number | null;
+  proxyHeight?: number | null;
   thumbnail?: string | null;
   /** Library folder this asset lives in (`null`/absent = root). */
   folderId?: string | null;
@@ -625,6 +990,8 @@ export interface GenerationInput {
   sourceStartFrame?: number | null;
   sourceEndFrame?: number | null;
   estimatedCostCredits?: number | null;
+  consentId?: string | null;
+  requestHash?: string | null;
 }
 
 /** A media-library folder (flat list; nest via `parentFolderId`). */
diff --git a/web/src/releaseParity.test.tsx b/web/src/releaseParity.test.tsx
new file mode 100644
index 00000000..bb7bc476
--- /dev/null
+++ b/web/src/releaseParity.test.tsx
@@ -0,0 +1,125 @@
+// @vitest-environment happy-dom
+
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { PanelShell } from "./components/ui/PanelShell";
+import { accessibleClipRects } from "./components/timeline/TimelineContainer";
+import type { Timeline } from "./lib/types";
+import { useEditorUiStore } from "./store/uiStore";
+
+vi.mock("./i18n", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("./i18n")>();
+  return { ...actual, useT: () => (key: string) => key };
+});
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean })
+  .IS_REACT_ACT_ENVIRONMENT = true;
+
+const webRoot = process.cwd();
+const globalCss = readFileSync(resolve(webRoot, "src/styles/global.css"), "utf8");
+const homeTests = readFileSync(
+  resolve(webRoot, "src/components/home/HomeView.test.tsx"),
+  "utf8",
+);
+const projectActionTests = readFileSync(
+  resolve(webRoot, "src/store/projectActions.test.ts"),
+  "utf8",
+);
+const sampleBackend = readFileSync(
+  resolve(webRoot, "../src-tauri/src/samples.rs"),
+  "utf8",
+);
+
+let root: Root;
+let container: HTMLDivElement;
+
+beforeEach(() => {
+  localStorage.clear();
+  useEditorUiStore.setState({ focusedPanel: "timeline" });
+  container = document.createElement("div");
+  document.body.append(container);
+  root = createRoot(container);
+});
+
+afterEach(async () => {
+  await act(async () => root.unmount());
+  container.remove();
+});
+
+it("sample_projects_accessibility_visual_and_interaction_gate", async () => {
+  await act(async () => {
+    root.render(
+      <PanelShell panel="preview">
+        <span>Preview</span>
+      </PanelShell>,
+    );
+  });
+
+  const panel = container.querySelector<HTMLElement>('[data-editor-panel="preview"]');
+  expect(panel).not.toBeNull();
+  expect(panel?.tabIndex).toBe(0);
+  await act(async () => panel?.focus());
+  expect(useEditorUiStore.getState().focusedPanel).toBe("preview");
+  expect(panel?.getAttribute("role")).toBe("region");
+  expect(panel?.getAttribute("aria-label")).toBe("layout.panel.preview");
+
+  const timeline: Timeline = {
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    settingsConfigured: true,
+    tracks: [{
+      id: "video-track",
+      type: "video",
+      muted: false,
+      hidden: false,
+      syncLocked: true,
+      clips: [{
+        id: "intro",
+        mediaRef: "intro-media",
+        mediaType: "video",
+        sourceClipType: "video",
+        startFrame: 0,
+        durationFrames: 1,
+        trimStartFrame: 0,
+        trimEndFrame: 0,
+        speed: 1,
+        volume: 1,
+        fadeInFrames: 0,
+        fadeOutFrames: 0,
+        fadeInInterpolation: "smooth",
+        fadeOutInterpolation: "smooth",
+        opacity: 1,
+        transform: {
+          centerX: 0.5,
+          centerY: 0.5,
+          width: 1,
+          height: 1,
+          rotation: 0,
+          flipHorizontal: false,
+          flipVertical: false,
+        },
+        crop: { left: 0, top: 0, right: 0, bottom: 0 },
+      }],
+    }],
+  };
+  const [clipRect] = accessibleClipRects(timeline, 1, {}, 0, 0, 600, 240);
+  expect(clipRect).toMatchObject({ clipId: "intro", width: 24, height: 46 });
+  expect(clipRect.label).toContain("V1");
+
+  expect(globalCss).toContain(":focus-visible");
+  expect(globalCss).toContain("@media (prefers-reduced-motion: reduce)");
+  expect(globalCss).toContain("@media (forced-colors: active)");
+
+  // The release umbrella is backed by the existing executable sample owners:
+  // Home routing, project lifecycle success/failure, and atomic offline bundle
+  // materialization. This test keeps those owners discoverable from one gate.
+  expect(homeTests).toContain("new_open_sample_register_only_after_success_and_route_tutorial");
+  expect(projectActionTests).toContain("opens a completed tutorial sample");
+  expect(projectActionTests).toContain("does not open or mutate recents when materialization fails");
+  expect(sampleBackend).toContain("built_in_tutorial_is_offline_and_contains_editing_steps");
+  expect(sampleBackend).toContain("failed_materialization_rolls_back_entire_sample_directory");
+});
diff --git a/web/src/store/chatStore.ts b/web/src/store/chatStore.ts
index ea09502a..c96591bf 100644
--- a/web/src/store/chatStore.ts
+++ b/web/src/store/chatStore.ts
@@ -13,6 +13,10 @@ interface ChatStoreState {
   messages: ChatMessage[];
   streaming: boolean;
   streamingId: string | null;
+  /** A reversible hand-off from another editor surface into the Agent composer.
+   *  The AgentPanel consumes and clears it after copying it into its local input. */
+  composerDraft: string | null;
+  setComposerDraft: (draft: string | null) => void;
   pushUser: (text: string) => void;
   beginStream: (id: string) => void;
   appendDelta: (delta: string) => void;
@@ -53,6 +57,8 @@ export const useChatStore = create<ChatStoreState>((set) => ({
   messages: [],
   streaming: false,
   streamingId: null,
+  composerDraft: null,
+  setComposerDraft: (composerDraft) => set({ composerDraft }),
 
   pushUser: (text) =>
     set((state) => ({
diff --git a/web/src/store/commandRouting.test.ts b/web/src/store/commandRouting.test.ts
new file mode 100644
index 00000000..be541f3d
--- /dev/null
+++ b/web/src/store/commandRouting.test.ts
@@ -0,0 +1,596 @@
+import { readdirSync, readFileSync } from "node:fs";
+import { extname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import type { Clip, EditRequest, TextStyle, Timeline, Transform } from "../lib/types";
+
+const ipc = vi.hoisted(() => ({
+  calls: [] as EditRequest[],
+  failure: null as Error | null,
+}));
+
+vi.mock("../lib/api", () => ({
+  isTauri: true,
+  editApply: async (command: EditRequest) => {
+    ipc.calls.push(structuredClone(command));
+    if (ipc.failure) {
+      const failure = ipc.failure;
+      ipc.failure = null;
+      throw failure;
+    }
+    return {
+      changed: false,
+      actionName: command.type,
+      affectedClipIds: [],
+      timelineVersion: 0,
+      summary: "",
+    };
+  },
+}));
+
+import {
+  EDIT_GESTURE_COMMAND_MATRIX,
+  EDIT_GESTURE_COMMAND_MATRIX_IS_EXHAUSTIVE,
+  addCaptions,
+  addClips,
+  addTexts,
+  addTextsAutoTrack,
+  adjustStabilization,
+  applyStabilization,
+  createNestedSequence,
+  copyClips,
+  currentTimelineEndFrame,
+  editNestedSequence,
+  renameNestedSequence,
+  dissolveNestedSequence,
+  createFolder,
+  deleteFolder,
+  deleteMedia,
+  duplicateClips,
+  freezeFrame,
+  insertClips,
+  insertTrack,
+  linkClips,
+  moveClips,
+  moveKeyframe,
+  moveToFolder,
+  pasteClipsAtPlayhead,
+  removeClips,
+  removeKeyframe,
+  removeTracks,
+  renameFolder,
+  renameMedia,
+  resetTransform,
+  resetStabilization,
+  rippleDeleteClips,
+  rippleDeleteRanges,
+  setChromaKey,
+  setClipProperties,
+  setColorGrade,
+  setLut,
+  setLoudnessNormalization,
+  setAudioDenoise,
+  setEffects,
+  setKeyframeInterpolation,
+  setKeyframes,
+  setMasks,
+  setTimelineSettings,
+  setTrackProps,
+  setTransition,
+  splitClip,
+  stampKeyframe,
+  swapClips,
+  swapMedia,
+  swapTracks,
+  trimClips,
+  unlinkClips,
+  upsertKeyframe,
+} from "./editActions";
+import { useClipboardStore } from "./clipboardStore";
+import { useProjectStore } from "./projectStore";
+import { createEditorUiStore, useEditorUiStore } from "./uiStore";
+
+const transform: Transform = {
+  centerX: 0.5,
+  centerY: 0.5,
+  width: 1,
+  height: 1,
+  rotation: 0,
+  flipHorizontal: false,
+  flipVertical: false,
+};
+
+const textStyle: TextStyle = {
+  fontName: "Helvetica-Bold",
+  fontSize: 48,
+  fontScale: 1,
+  color: { r: 1, g: 1, b: 1, a: 1 },
+  alignment: "center",
+  shadow: {
+    enabled: false,
+    color: { r: 0, g: 0, b: 0, a: 1 },
+    offsetX: 0,
+    offsetY: 0,
+    blur: 0,
+  },
+  background: { enabled: false, color: { r: 0, g: 0, b: 0, a: 0 } },
+  border: { enabled: false, color: { r: 0, g: 0, b: 0, a: 0 } },
+};
+
+const clipEntry = {
+  mediaRef: "media-a",
+  mediaType: "video" as const,
+  sourceClipType: "video" as const,
+  trackIndex: 0,
+  startFrame: 10,
+  durationFrames: 20,
+};
+
+function sourceFiles(root: string): string[] {
+  return readdirSync(root, { withFileTypes: true }).flatMap((entry) => {
+    const path = join(root, entry.name);
+    if (entry.isDirectory()) return sourceFiles(path);
+    return [".ts", ".tsx"].includes(extname(path)) && !path.includes(".test.") ? [path] : [];
+  });
+}
+
+describe("edit gesture command routing", () => {
+  beforeEach(() => {
+    ipc.calls.length = 0;
+    ipc.failure = null;
+    useEditorUiStore.getState().exitNestedSequence();
+    useClipboardStore.getState().clear();
+  });
+
+  afterEach(() => vi.unstubAllGlobals());
+
+  it("every_edit_action_emits_exact_edit_request", async () => {
+    expect(EDIT_GESTURE_COMMAND_MATRIX_IS_EXHAUSTIVE).toBe(true);
+    expect(new Set(EDIT_GESTURE_COMMAND_MATRIX.map((row) => row.requestType)).size).toBe(
+      EDIT_GESTURE_COMMAND_MATRIX.length,
+    );
+
+    const route = async (expected: EditRequest, invoke: () => Promise<unknown>) => {
+      const before = ipc.calls.length;
+      await invoke();
+      expect(ipc.calls.slice(before)).toEqual([expected]);
+    };
+
+    useEditorUiStore.getState().selectClips(new Set(["clip-a"]));
+    await route(
+      { type: "createNestedSequence", name: "Scene", clipIds: ["clip-a"] },
+      () => createNestedSequence("Scene"),
+    );
+    await route(
+      {
+        type: "editNestedSequence",
+        sequenceId: "sequence-a",
+        command: { type: "removeClips", clipIds: ["child-a"] },
+      },
+      () => editNestedSequence("sequence-a", { type: "removeClips", clipIds: ["child-a"] }),
+    );
+    await route(
+      { type: "renameNestedSequence", sequenceId: "sequence-a", name: "Edited" },
+      () => renameNestedSequence("sequence-a", "Edited"),
+    );
+    await route(
+      { type: "dissolveNestedSequence", clipId: "compound-a" },
+      () => dissolveNestedSequence("compound-a"),
+    );
+    await route({ type: "addClips", entries: [clipEntry] }, () => addClips([clipEntry]));
+    await route(
+      { type: "insertClips", trackIndex: 0, atFrame: 5, entries: [clipEntry] },
+      () => insertClips(0, 5, [clipEntry]),
+    );
+    await route(
+      { type: "moveClips", moves: [{ clipId: "clip-a", toTrack: 1, toFrame: 30 }] },
+      () => moveClips([{ clipId: "clip-a", toTrack: 1, toFrame: 30 }]),
+    );
+    await route(
+      { type: "duplicateClips", clipIds: ["clip-a"], offsetFrames: 3, targetTrackIndexes: [1] },
+      () => duplicateClips(["clip-a"], 3, [1]),
+    );
+    await route({ type: "removeClips", clipIds: ["clip-a"] }, () => removeClips(["clip-a"]));
+    await route({ type: "splitClip", clipId: "clip-a", atFrame: 15 }, () => splitClip("clip-a", 15));
+    await route(
+      { type: "freezeFrame", clipId: "clip-a", atFrame: 15, durationFrames: 30 },
+      () => freezeFrame("clip-a", 15, 30),
+    );
+    await route(
+      { type: "trimClips", edits: [{ clipId: "clip-a", trimStartFrame: 2, trimEndFrame: 4 }] },
+      () => trimClips([{ clipId: "clip-a", trimStartFrame: 2, trimEndFrame: 4 }]),
+    );
+    await route(
+      { type: "setClipProperties", clipIds: ["clip-a"], properties: { opacity: 0.5 } },
+      () => setClipProperties(["clip-a"], { opacity: 0.5 }),
+    );
+    await route(
+      { type: "setKeyframes", clipId: "clip-a", property: "opacity", payload: { kind: "scalar", keyframes: [] } },
+      () => setKeyframes("clip-a", "opacity", { kind: "scalar", keyframes: [] }),
+    );
+    await route(
+      { type: "stampKeyframe", clipId: "clip-a", property: "opacity", frame: 12 },
+      () => stampKeyframe("clip-a", "opacity", 12),
+    );
+    await route(
+      { type: "upsertKeyframe", clipId: "clip-a", property: "opacity", frame: 12, value: { kind: "scalar", value: 0.75 } },
+      () => upsertKeyframe("clip-a", "opacity", 12, { kind: "scalar", value: 0.75 }),
+    );
+    await route(
+      { type: "removeKeyframe", clipId: "clip-a", property: "opacity", frame: 12 },
+      () => removeKeyframe("clip-a", "opacity", 12),
+    );
+    await route(
+      { type: "moveKeyframe", clipId: "clip-a", property: "opacity", fromFrame: 12, toFrame: 14 },
+      () => moveKeyframe("clip-a", "opacity", 12, 14),
+    );
+    await route(
+      { type: "setKeyframeInterpolation", clipId: "clip-a", property: "opacity", frame: 14, interpolation: "hold" },
+      () => setKeyframeInterpolation("clip-a", "opacity", 14, "hold"),
+    );
+    await route({ type: "setColorGrade", clipIds: ["clip-a"], grade: null }, () => setColorGrade(["clip-a"], null));
+    await route({ type: "setLut", clipIds: ["clip-a"], lut: null }, () => setLut(["clip-a"], null));
+    await route({ type: "setChromaKey", clipIds: ["clip-a"], chromaKey: null }, () => setChromaKey(["clip-a"], null));
+    await route(
+      { type: "setMasks", clipIds: ["clip-a"], masks: [{ shape: { kind: "circle", center: { x: 0.5, y: 0.5 }, radius: { x: 0.25, y: 0.25 } }, feather: 0, invert: false }] },
+      () => setMasks(["clip-a"], [{ shape: { kind: "circle", center: { x: 0.5, y: 0.5 }, radius: { x: 0.25, y: 0.25 } }, feather: 0, invert: false }]),
+    );
+    await route(
+      { type: "setEffects", clipIds: ["clip-a"], effects: [{ name: "grayscale", params: { amount: 0.4 }, enabled: true }] },
+      () => setEffects(["clip-a"], [{ name: "grayscale", params: { amount: 0.4 }, enabled: true }]),
+    );
+    const loudness = {
+      targetLufs: -16,
+      truePeakCeilingDbtp: -1,
+      inputIntegratedLufs: -23,
+      inputTruePeakDbtp: -8,
+      gainDb: 7,
+      outputIntegratedLufs: -16,
+      outputTruePeakDbtp: -1,
+    };
+    await route(
+      { type: "setLoudnessNormalization", clipId: "clip-a", normalization: loudness },
+      () => setLoudnessNormalization("clip-a", loudness),
+    );
+    const denoise = { mode: "voice" as const, strength: 0.85, previewEnabled: true };
+    await route(
+      { type: "setAudioDenoise", clipId: "clip-a", denoise },
+      () => setAudioDenoise("clip-a", denoise),
+    );
+    const stabilization = {
+      model: "opentake.motion-smoothing",
+      modelVersion: 1,
+      sourceIdentity: "media-a",
+      strength: 1,
+      cropMargin: 0,
+      keyframes: [
+        { frame: 0, translationX: 0, translationY: 0, rotationDegrees: 0 },
+        { frame: 10, translationX: 0.01, translationY: 0, rotationDegrees: 0 },
+      ],
+    };
+    await route(
+      { type: "applyStabilization", clipId: "clip-a", solution: stabilization },
+      () => applyStabilization("clip-a", stabilization),
+    );
+    await route(
+      { type: "adjustStabilization", clipId: "clip-a", strength: 0.75, cropMargin: 0.02 },
+      () => adjustStabilization("clip-a", { strength: 0.75, cropMargin: 0.02 }),
+    );
+    await route(
+      { type: "resetStabilization", clipId: "clip-a" },
+      () => resetStabilization("clip-a"),
+    );
+    await route(
+      { type: "setTransition", fromClipId: "clip-a", toClipId: "clip-b", kind: "crossDissolve", durationFrames: 8 },
+      () => setTransition("clip-a", "clip-b", "crossDissolve", 8),
+    );
+    await route(
+      { type: "rippleDeleteRanges", trackIndex: 0, ranges: [{ start: 4, end: 9 }] },
+      () => rippleDeleteRanges(0, [{ start: 4, end: 9 }]),
+    );
+    await route({ type: "rippleDeleteClips", clipIds: ["clip-a"] }, () => rippleDeleteClips(["clip-a"]));
+    await route(
+      { type: "addTexts", entries: [{ trackIndex: 0, startFrame: 0, durationFrames: 30, content: "Title", textStyle, transform }] },
+      () => addTexts([{ trackIndex: 0, startFrame: 0, durationFrames: 30, content: "Title", textStyle, transform }]),
+    );
+    await route(
+      { type: "addTextsAutoTrack", entries: [{ startFrame: 0, durationFrames: 30, content: "Title", textStyle, transform }] },
+      () => addTextsAutoTrack([{ startFrame: 0, durationFrames: 30, content: "Title", textStyle, transform }]),
+    );
+    await route(
+      { type: "addCaptions", entries: [{ startFrame: 0, durationFrames: 10, content: "Caption", textStyle, transform, captionGroupId: "captions-a" }] },
+      () => addCaptions([{ startFrame: 0, durationFrames: 10, content: "Caption", textStyle, transform, captionGroupId: "captions-a" }]),
+    );
+    await route({ type: "link", clipIds: ["clip-a", "clip-b"] }, () => linkClips(["clip-a", "clip-b"]));
+    await route({ type: "unlink", clipIds: ["clip-a"] }, () => unlinkClips(["clip-a"]));
+    await route({ type: "removeTracks", trackIndexes: [1, 3] }, () => removeTracks([1, 3]));
+    await route({ type: "swapTracks", a: 0, b: 1 }, () => swapTracks(0, 1));
+    await route({ type: "swapClips", clipA: "clip-a", clipB: "clip-b" }, () => swapClips("clip-a", "clip-b"));
+    await route({ type: "insertTrack", kind: "video", at: 1 }, () => insertTrack("video", 1));
+    await route(
+      { type: "setTrackProps", trackIndex: 0, muted: true, syncLocked: false },
+      () => setTrackProps(0, { muted: true, syncLocked: false }),
+    );
+    await route({ type: "createFolder", name: "B-roll", parentFolderId: "root" }, () => createFolder("B-roll", "root"));
+    await route({ type: "moveToFolder", assetIds: ["media-a"], folderId: "folder-a" }, () => moveToFolder(["media-a"], "folder-a"));
+    await route({ type: "renameMedia", entries: [{ id: "media-a", name: "Intro" }] }, () => renameMedia([{ id: "media-a", name: "Intro" }]));
+    await route({ type: "renameFolder", entries: [{ id: "folder-a", name: "Selects" }] }, () => renameFolder([{ id: "folder-a", name: "Selects" }]));
+    await route({ type: "deleteMedia", assetIds: ["media-a"] }, () => deleteMedia(["media-a"]));
+    await route({ type: "deleteFolder", folderIds: ["folder-a"] }, () => deleteFolder(["folder-a"]));
+    await route({ type: "swapMedia", clipId: "clip-a", mediaRef: "media-b" }, () => swapMedia("clip-a", "media-b"));
+    await route({ type: "resetTransform", clipIds: ["clip-a"] }, () => resetTransform(["clip-a"]));
+    await route({ type: "setTimelineSettings", fps: 24, width: 3840, height: 2160 }, () => setTimelineSettings(24, 3840, 2160));
+
+    expect(ipc.calls.map((request) => request.type)).toEqual(
+      EDIT_GESTURE_COMMAND_MATRIX.map((row) => row.requestType),
+    );
+
+    const beforeNoOps = ipc.calls.length;
+    await addClips([]);
+    await moveClips([]);
+    await removeTracks([]);
+    await swapTracks(2, 2);
+    await swapClips("same", "same");
+    expect(ipc.calls).toHaveLength(beforeNoOps);
+
+    const src = fileURLToPath(new URL("..", import.meta.url));
+    const forbidden = /(?:\.tracks|\.clips)\.(?:push|splice)\s*\(|\.(?:startFrame|durationFrames|trimStartFrame|trimEndFrame)\s*=(?!=)|useProjectStore\.setState\s*\(/;
+    const illegal = sourceFiles(src)
+      .filter((path) => {
+        const portablePath = path.replaceAll("\\", "/");
+        return !portablePath.endsWith("/lib/fallback.ts") && !portablePath.endsWith("/store/projectStore.ts");
+      })
+      .filter((path) => forbidden.test(readFileSync(path, "utf8")));
+    expect(illegal).toEqual([]);
+  });
+
+  it("routes child edits to the active sequence but keeps global commands at root", async () => {
+    useEditorUiStore.getState().enterNestedSequence("sequence-a");
+
+    await addClips([clipEntry]);
+    await deleteMedia(["media-a"]);
+    await createFolder("Selects");
+    await setTimelineSettings(24, 1280, 720);
+
+    expect(ipc.calls).toEqual([
+      {
+        type: "editNestedSequence",
+        sequenceId: "sequence-a",
+        command: { type: "addClips", entries: [clipEntry] },
+      },
+      { type: "deleteMedia", assetIds: ["media-a"] },
+      { type: "createFolder", name: "Selects" },
+      { type: "setTimelineSettings", fps: 24, width: 1280, height: 720 },
+    ]);
+  });
+
+  it("project_store_has_no_timeline_mutator_and_refreshes_only_from_native_events", () => {
+    const store = useProjectStore.getState();
+    expect("setMirror" in store).toBe(false);
+
+    const newest = {
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: true,
+        tracks: [],
+      },
+      projectEpoch: 4,
+      version: 12,
+      projectPath: "/new.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    };
+    store.replaceProjectSnapshot(newest);
+    store.replaceProjectSnapshot({ ...newest, version: 11, projectPath: "/stale.opentake" });
+
+    const committed = useProjectStore.getState();
+    expect(committed.timelineVersion).toBe(12);
+    expect(committed.projectPath).toBe("/new.opentake");
+    expect(Object.isFrozen(committed.timeline)).toBe(true);
+    newest.timeline.fps = 60;
+    expect(useProjectStore.getState().timeline.fps).toBe(30);
+    expect(() => {
+      useProjectStore.getState().timeline.fps = 120;
+    }).toThrow();
+  });
+
+  it("nested timeline gestures are wrapped with the active sequence authority", async () => {
+    useEditorUiStore.getState().enterNestedSequence("sequence-a");
+
+    await moveClips([{ clipId: "child-a", toTrack: 0, toFrame: 12 }]);
+
+    expect(ipc.calls).toEqual([
+      {
+        type: "editNestedSequence",
+        sequenceId: "sequence-a",
+        command: {
+          type: "moveClips",
+          moves: [{ clipId: "child-a", toTrack: 0, toFrame: 12 }],
+        },
+      },
+    ]);
+  });
+
+  it("nested clipboard reads, bounds, and paste target the active sequence", async () => {
+    const childClip: Clip = {
+      id: "child-a",
+      mediaRef: "media-a",
+      mediaType: "video",
+      sourceClipType: "video",
+      startFrame: 15,
+      durationFrames: 110,
+      trimStartFrame: 10,
+      trimEndFrame: 0,
+      speed: 1,
+      volume: 1,
+      fadeInFrames: 0,
+      fadeOutFrames: 0,
+      fadeInInterpolation: "linear",
+      fadeOutInterpolation: "linear",
+      opacity: 1,
+      transform,
+      crop: { left: 0, top: 0, right: 0, bottom: 0 },
+    };
+    const childTimeline: Timeline = {
+      fps: 30,
+      width: 1920,
+      height: 1080,
+      settingsConfigured: true,
+      tracks: [
+        {
+          id: "child-video",
+          type: "video",
+          muted: false,
+          hidden: false,
+          syncLocked: true,
+          clips: [childClip],
+        },
+      ],
+    };
+    useProjectStore.getState().replaceProjectSnapshot({
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: true,
+        tracks: [],
+        nestedSequences: [{ id: "sequence-a", name: "Scene", timeline: childTimeline }],
+      },
+      projectEpoch: 5,
+      version: 2,
+      projectPath: "/nested.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    });
+    useEditorUiStore.getState().enterNestedSequence("sequence-a");
+    useEditorUiStore.setState({
+      selectedClipIds: new Set(["child-a"]),
+      activeFrame: 150,
+      currentFrame: 150,
+    });
+
+    expect(currentTimelineEndFrame()).toBe(125);
+    copyClips();
+    await pasteClipsAtPlayhead();
+
+    expect(ipc.calls).toEqual([
+      {
+        type: "editNestedSequence",
+        sequenceId: "sequence-a",
+        command: {
+          type: "addClips",
+          entries: [
+            {
+              mediaRef: "media-a",
+              mediaType: "video",
+              sourceClipType: "video",
+              trackIndex: 0,
+              startFrame: 150,
+              durationFrames: 110,
+              trimStartFrame: 10,
+              trimEndFrame: 0,
+              hasAudio: true,
+              addLinkedAudio: false,
+              transform,
+            },
+          ],
+        },
+      },
+    ]);
+  });
+
+  it("rust_authority_and_ui_persistence_are_independently_owned", async () => {
+    const values = new Map<string, string>();
+    vi.stubGlobal("localStorage", {
+      getItem: (key: string) => values.get(key) ?? null,
+      setItem: (key: string, value: string) => values.set(key, value),
+      removeItem: (key: string) => values.delete(key),
+      clear: () => values.clear(),
+    });
+
+    const ui = createEditorUiStore();
+    ui.getState().setLayoutPreset("vertical");
+    ui.getState().toggleAgentPanel();
+    ui.getState().setZoomScale(8);
+    ui.getState().setCurrentFrame(240);
+    ui.getState().selectClips(new Set(["project-a-clip"]));
+    ui.getState().setPreviewMedia("project-a-media");
+
+    expect([...values.keys()].sort()).toEqual([
+      "opentake.ui.v1.agentPanelVisible",
+      "opentake.ui.v1.layoutPreset",
+      "opentake.ui.v1.zoomScale",
+    ]);
+    expect([...values.values()].join(" ")).not.toContain("project-a");
+
+    const restarted = createEditorUiStore().getState();
+    expect(restarted).toMatchObject({
+      layoutPreset: "vertical",
+      agentPanelVisible: true,
+      zoomScale: 8,
+      currentFrame: 0,
+      previewMediaId: null,
+    });
+    expect(restarted.selectedClipIds).toEqual(new Set());
+
+    const project = useProjectStore.getState();
+    const snapshot = {
+      timeline: {
+        fps: 30,
+        width: 1920,
+        height: 1080,
+        settingsConfigured: true,
+        tracks: [],
+      },
+      projectEpoch: 50,
+      version: 2,
+      projectPath: "/project-a.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    };
+    project.replaceProjectSnapshot(snapshot);
+    project.replaceProjectSnapshot({ ...snapshot, version: 1, projectPath: "/stale.opentake" });
+    expect(useProjectStore.getState()).toMatchObject({
+      projectEpoch: 50,
+      timelineVersion: 2,
+      projectPath: "/project-a.opentake",
+    });
+
+    const authoritativeTimeline = useProjectStore.getState().timeline;
+    await Promise.all([removeClips(["clip-a"]), removeClips(["clip-b"])]);
+    expect(ipc.calls.slice(-2)).toEqual([
+      { type: "removeClips", clipIds: ["clip-a"] },
+      { type: "removeClips", clipIds: ["clip-b"] },
+    ]);
+    expect(useProjectStore.getState()).toMatchObject({
+      projectEpoch: 50,
+      timelineVersion: 2,
+      projectPath: "/project-a.opentake",
+      timeline: authoritativeTimeline,
+    });
+
+    ipc.failure = new Error("native edit failed");
+    await expect(removeClips(["failed-clip"])).rejects.toThrow("native edit failed");
+    expect(useProjectStore.getState()).toMatchObject({
+      projectEpoch: 50,
+      timelineVersion: 2,
+      projectPath: "/project-a.opentake",
+      timeline: authoritativeTimeline,
+    });
+
+    ui.getState().resetProjectRuntimeState();
+    expect(ui.getState()).toMatchObject({
+      layoutPreset: "vertical",
+      agentPanelVisible: true,
+      zoomScale: 8,
+      currentFrame: 0,
+      previewMediaId: null,
+    });
+
+    const uiSource = readFileSync(new URL("./uiStore.ts", import.meta.url), "utf8");
+    expect(uiSource).not.toMatch(/localStorage[^\n]*(?:timeline|clip|media|credential|secret)/i);
+  });
+});
diff --git a/web/src/store/editActions.test.ts b/web/src/store/editActions.test.ts
index 85a67a91..c5841b9c 100644
--- a/web/src/store/editActions.test.ts
+++ b/web/src/store/editActions.test.ts
@@ -26,10 +26,47 @@ const srv = vi.hoisted(() => {
     transform?: Transform;
   };
   type STrack = { id: string; type: string; clips: SClip[] };
-  const state: { tracks: STrack[]; version: number; seq: number } = {
+  type SCommand = {
+    type: string;
+    kind?: string;
+    at?: number;
+    fps?: number;
+    width?: number;
+    height?: number;
+    entries?: Array<{
+      mediaRef?: string;
+      mediaType?: ClipType;
+      sourceClipType?: ClipType;
+      trackIndex?: number;
+      startFrame: number;
+      durationFrames: number;
+      trimStartFrame?: number;
+      trimEndFrame?: number;
+      transform?: Transform;
+    }>;
+    trackIndex?: number;
+    atFrame?: number;
+    a?: number;
+    b?: number;
+  };
+  const state: {
+    tracks: STrack[];
+    version: number;
+    seq: number;
+    fps: number;
+    width: number;
+    height: number;
+    settingsConfigured: boolean;
+    commands: SCommand[];
+  } = {
     tracks: [],
     version: 0,
     seq: 0,
+    fps: 30,
+    width: 1920,
+    height: 1080,
+    settingsConfigured: true,
+    commands: [],
   };
   // Core overwrite-on-place: clear any clip overlapping [start, end) before placing.
   function clearRegion(track: STrack, start: number, end: number): void {
@@ -43,29 +80,27 @@ const srv = vi.hoisted(() => {
       state.tracks = [];
       state.version = 0;
       state.seq = 0;
+      state.fps = 30;
+      state.width = 1920;
+      state.height = 1080;
+      state.settingsConfigured = true;
+      state.commands = [];
     },
-    apply(cmd: {
-      type: string;
-      kind?: string;
-      at?: number;
-      // `addClips` entries carry `trackIndex`; `addTextsAutoTrack` entries
-      // don't (every entry lands on the one fresh track the command creates).
-      entries?: Array<{
-        mediaRef?: string;
-        mediaType?: ClipType;
-        sourceClipType?: ClipType;
-        trackIndex?: number;
-        startFrame: number;
-        durationFrames: number;
-        trimStartFrame?: number;
-        trimEndFrame?: number;
-        transform?: Transform;
-      }>;
-      trackIndex?: number;
-      atFrame?: number;
-      a?: number;
-      b?: number;
-    }): { changed: boolean; affectedClipIds: string[] } {
+    apply(cmd: SCommand): { changed: boolean; affectedClipIds: string[] } {
+      state.commands.push(cmd);
+      if (
+        cmd.type === "setTimelineSettings" &&
+        cmd.fps !== undefined &&
+        cmd.width !== undefined &&
+        cmd.height !== undefined
+      ) {
+        state.fps = cmd.fps;
+        state.width = cmd.width;
+        state.height = cmd.height;
+        state.settingsConfigured = true;
+        state.version += 1;
+        return { changed: true, affectedClipIds: [] };
+      }
       if (cmd.type === "insertTrack") {
         const at = Math.max(0, Math.min(state.tracks.length, cmd.at ?? state.tracks.length));
         state.tracks.splice(at, 0, {
@@ -189,10 +224,10 @@ vi.mock("../lib/api", () => ({
   },
   getTimeline: async () => ({
     timeline: {
-      fps: 30,
-      width: 1920,
-      height: 1080,
-      settingsConfigured: true,
+      fps: srv.state.fps,
+      width: srv.state.width,
+      height: srv.state.height,
+      settingsConfigured: srv.state.settingsConfigured,
       tracks: srv.state.tracks.map((t) => ({
         id: t.id,
         type: t.type,
@@ -244,6 +279,8 @@ import {
   addMediaToTimelineAt,
   addMomentToTimelineAt,
   addTextClip,
+  applyAutomationCommands,
+  buildMediaInsertPlan,
   insertClips,
   insertTrack,
   mediaDurationFrames,
@@ -264,6 +301,18 @@ const EMPTY: Timeline = {
   tracks: [],
 };
 
+function setMirror(timeline: Timeline, version: number, projectEpoch: number): void {
+  useProjectStore.getState().clearProjectSnapshot();
+  useProjectStore.getState().replaceProjectSnapshot({
+    timeline,
+    version,
+    projectEpoch,
+    projectPath: null,
+    compatibilityReadOnly: false,
+    compatibilityBlockers: [],
+  });
+}
+
 function video(name: string, width?: number, height?: number): MediaItem {
   // duration 2s * 30fps = 60 frames per clip.
   return { id: name, name, type: "video", duration: 2, width, height, hasAudio: false };
@@ -306,7 +355,7 @@ function clipboardClip(transform: Transform): Clip {
 describe("addMediaToTimeline", () => {
   beforeEach(() => {
     srv.reset();
-    useProjectStore.getState().setMirror(EMPTY, 0, 1);
+    setMirror(EMPTY, 0, 1);
     useClipboardStore.getState().clear();
     useEditorUiStore.setState({ activeFrame: 0, currentFrame: 0, selectedClipIds: new Set() });
   });
@@ -326,6 +375,61 @@ describe("addMediaToTimeline", () => {
     expect(visualClipStarts()).toEqual([0, 60]);
   });
 
+  it("applies first-video settings before placing the first clip", async () => {
+    srv.state.settingsConfigured = false;
+    setMirror({ ...EMPTY, settingsConfigured: false }, 0, 1);
+
+    await addMediaToTimeline({
+      ...video("first", 3840, 2160),
+      sourceFps: 23.976,
+    });
+
+    expect(srv.state.commands.map((command) => command.type)).toEqual([
+      "setTimelineSettings",
+      "insertTrack",
+      "addClips",
+    ]);
+    expect(srv.state.commands[0]).toMatchObject({
+      type: "setTimelineSettings",
+      fps: 24,
+      width: 3840,
+      height: 2160,
+    });
+    expect(srv.state.commands[2].entries?.[0]).toMatchObject({
+      mediaRef: "first",
+      durationFrames: 48,
+    });
+    expect(useProjectStore.getState().timeline).toMatchObject({
+      fps: 24,
+      width: 3840,
+      height: 2160,
+      settingsConfigured: true,
+    });
+  });
+
+  it("waits for configured-empty mismatch choice and preserves either decision", async () => {
+    const mismatched = { ...video("mismatch", 3840, 2160), sourceFps: 24 };
+    const keep = addMediaToTimeline(mismatched);
+    await vi.waitFor(() => expect(useEditorUiStore.getState().projectSettingsPrompt).not.toBeNull());
+    useEditorUiStore.getState().resolveProjectSettingsPrompt(false);
+    await keep;
+    expect(srv.state.commands.some((command) => command.type === "setTimelineSettings")).toBe(false);
+    expect(srv.state.commands.at(-1)?.entries?.[0]).toMatchObject({ durationFrames: 60 });
+
+    srv.reset();
+    setMirror(EMPTY, 0, 1);
+    const match = addMediaToTimeline(mismatched);
+    await vi.waitFor(() => expect(useEditorUiStore.getState().projectSettingsPrompt).not.toBeNull());
+    useEditorUiStore.getState().resolveProjectSettingsPrompt(true);
+    await match;
+    expect(srv.state.commands.map((command) => command.type)).toEqual([
+      "setTimelineSettings",
+      "insertTrack",
+      "addClips",
+    ]);
+    expect(srv.state.commands.at(-1)?.entries?.[0]).toMatchObject({ durationFrames: 48 });
+  });
+
   it("drops overlapping media onto a new top overlay track instead of overwriting", async () => {
     await addMediaToTimeline(video("base"));
     await addMediaToTimelineAt(video("overlay"), 0, 0);
@@ -378,7 +482,10 @@ describe("addMediaToTimeline", () => {
   });
 
   it("adds vertical media with the upstream aspect-fit transform", async () => {
-    await addMediaToTimeline(video("vertical", 1080, 1920));
+    const add = addMediaToTimeline(video("vertical", 1080, 1920));
+    await vi.waitFor(() => expect(useEditorUiStore.getState().projectSettingsPrompt).not.toBeNull());
+    useEditorUiStore.getState().resolveProjectSettingsPrompt(false);
+    await add;
 
     const [transform] = visualClipTransforms();
     expect(transform.width).toBeCloseTo(0.31640625);
@@ -423,6 +530,27 @@ describe("addMediaToTimeline", () => {
   });
 });
 
+describe("applyAutomationCommands", () => {
+  beforeEach(() => {
+    srv.reset();
+    setMirror(EMPTY, 0, 1);
+  });
+
+  it("accepts one atomic request and refuses a multi-command pseudo-transaction", async () => {
+    const result = await applyAutomationCommands([{ type: "insertTrack", kind: "video" }]);
+    expect(result).toHaveLength(1);
+    expect(srv.state.commands.map((command) => command.type)).toEqual(["insertTrack"]);
+
+    await expect(
+      applyAutomationCommands([
+        { type: "insertTrack", kind: "video" },
+        { type: "insertTrack", kind: "audio" },
+      ]),
+    ).rejects.toThrow("one atomic EditRequest");
+    expect(srv.state.commands.map((command) => command.type)).toEqual(["insertTrack"]);
+  });
+});
+
 // The drop ghost must show EXACTLY where the clip will land, so its track
 // resolver has to mirror `addMediaToTimelineAtInner`'s placement rules.
 describe("resolveMediaDropTrack (drop-ghost truthfulness)", () => {
@@ -540,12 +668,68 @@ describe("momentDurationFrames", () => {
   it("never returns less than one frame for a tiny range", () => {
     expect(momentDurationFrames({ startSec: 3, endSec: 3.001 }, 30)).toBe(1);
   });
+
+  it("seconds_to_frame_truncates_fractional_boundaries", async () => {
+    for (const fps of [24, 30]) {
+      for (const [frames, expected] of [
+        [0.49, 1],
+        [0.5, 1],
+        [0.99, 1],
+        [1.01, 1],
+        [10.49, 10],
+        [10.5, 10],
+        [10.99, 10],
+        [11.01, 11],
+      ] as const) {
+        const duration = frames / fps;
+        const item: MediaItem = {
+          id: `v-${fps}-${frames}`,
+          name: "fractional.mp4",
+          type: "video",
+          duration,
+          hasAudio: false,
+        };
+        expect(mediaDurationFrames(item, fps)).toBe(expected);
+        expect(momentDurationFrames({ startSec: 5, endSec: 5 + duration }, fps)).toBe(expected);
+        const plan = buildMediaInsertPlan(
+          {
+            ...EMPTY,
+            fps,
+            tracks: [
+              {
+                id: "video-track",
+                type: "video",
+                muted: false,
+                hidden: false,
+                syncLocked: true,
+                clips: [],
+              },
+            ],
+          },
+          item,
+          0,
+          0,
+        );
+        expect(plan?.entries[0].durationFrames).toBe(expected);
+      }
+    }
+
+    expect(momentDurationFrames({ startSec: 2, endSec: 1 }, 30)).toBe(1);
+    expect(momentDurationFrames({ startSec: Number.NaN, endSec: 1 }, 30)).toBe(1);
+    expect(momentDurationFrames({ startSec: 0, endSec: Number.POSITIVE_INFINITY }, 30)).toBe(1);
+
+    srv.reset();
+    setMirror({ ...EMPTY, fps: 29.97 }, 0, 1);
+    useEditorUiStore.setState({ activeFrame: 0, currentFrame: 0, selectedClipIds: new Set() });
+    await addTextClip();
+    expect(useProjectStore.getState().timeline.tracks[0].clips[0].durationFrames).toBe(89);
+  });
 });
 
 describe("addMomentToTimelineAt (trimmed source-range drop from a search hit)", () => {
   beforeEach(() => {
     srv.reset();
-    useProjectStore.getState().setMirror(EMPTY, 0, 1);
+    setMirror(EMPTY, 0, 1);
     useEditorUiStore.setState({ activeFrame: 0, currentFrame: 0, selectedClipIds: new Set() });
   });
 
@@ -598,7 +782,7 @@ describe("addMomentToTimelineAt (trimmed source-range drop from a search hit)",
 describe("addTextClip (Toolbar 'T' button)", () => {
   beforeEach(() => {
     srv.reset();
-    useProjectStore.getState().setMirror(EMPTY, 0, 1);
+    setMirror(EMPTY, 0, 1);
     useEditorUiStore.setState({ activeFrame: 0, currentFrame: 0, selectedClipIds: new Set() });
   });
 
diff --git a/web/src/store/editActions.ts b/web/src/store/editActions.ts
index acccc4e6..df4d4bc4 100644
--- a/web/src/store/editActions.ts
+++ b/web/src/store/editActions.ts
@@ -15,11 +15,14 @@ import type { TrackDropTarget } from "../lib/geometry";
 import { validRange, type TimelineRange } from "../lib/timelineRange";
 import { planNudge } from "../lib/timelineNudge";
 import { buildInsertPlan, type InsertPlan } from "../lib/timelineInsert";
+import { checkProjectSettings, type ProjectSettingsTarget } from "../lib/projectSettings";
 import { expandLinkGroup } from "../components/timeline/hitTest";
 import { useClipboardStore } from "./clipboardStore";
+import { t } from "../i18n";
 import type {
   CaptionEntryReq,
   CaptionRequest,
+  AudioDenoise,
   Clip,
   ClipEntryReq,
   ClipMoveReq,
@@ -36,28 +39,177 @@ import type {
   KeyframeProperty,
   KeyframeValueReq,
   MaskInput,
+  LutReference,
+  LoudnessNormalization,
+  DenoiseMode,
   MediaItem,
+  StabilizationTrack,
   RenameEntryReq,
+  TextEntryReq,
   TextAutoTrackEntryReq,
   TextStyle,
   Timeline,
   Transform,
+  TransitionKind,
   TrimEditReq,
 } from "../lib/types";
 
-async function applyAndRefresh(cmd: Parameters<typeof api.editApply>[0]) {
-  const res = await api.editApply(cmd);
+/**
+ * Maintained UI-gesture → wire DTO → Rust command inventory. The exhaustiveness
+ * sentinel below makes a newly-added `EditRequest` variant a compile failure
+ * until its production gesture route is recorded here.
+ */
+export const EDIT_GESTURE_COMMAND_MATRIX = [
+  { gesture: "group selected clips", action: "createNestedSequence", requestType: "createNestedSequence", backend: "CreateNestedSequenceFromClips" },
+  { gesture: "edit inside compound", action: "editNestedSequence", requestType: "editNestedSequence", backend: "EditNestedSequence" },
+  { gesture: "rename compound", action: "renameNestedSequence", requestType: "renameNestedSequence", backend: "RenameNestedSequence" },
+  { gesture: "dissolve compound", action: "dissolveNestedSequence", requestType: "dissolveNestedSequence", backend: "DissolveNestedSequence" },
+  { gesture: "media overwrite drop", action: "addClips", requestType: "addClips", backend: "AddClips" },
+  { gesture: "media ripple insert", action: "insertClips", requestType: "insertClips", backend: "InsertClips" },
+  { gesture: "clip drag commit", action: "moveClips", requestType: "moveClips", backend: "MoveClips" },
+  { gesture: "option drag copy", action: "duplicateClips", requestType: "duplicateClips", backend: "DuplicateClips" },
+  { gesture: "delete selection", action: "removeClips", requestType: "removeClips", backend: "RemoveClips" },
+  { gesture: "razor or command-k", action: "splitClip", requestType: "splitClip", backend: "SplitClip" },
+  { gesture: "freeze frame", action: "freezeFrame", requestType: "freezeFrame", backend: "FreezeFrame" },
+  { gesture: "trim handle commit", action: "trimClips", requestType: "trimClips", backend: "TrimClips" },
+  { gesture: "inspector property commit", action: "setClipProperties", requestType: "setClipProperties", backend: "SetClipProperties" },
+  { gesture: "replace keyframe lane", action: "setKeyframes", requestType: "setKeyframes", backend: "SetKeyframes" },
+  { gesture: "stamp keyframe", action: "stampKeyframe", requestType: "stampKeyframe", backend: "StampKeyframe" },
+  { gesture: "write animated value", action: "upsertKeyframe", requestType: "upsertKeyframe", backend: "UpsertKeyframe" },
+  { gesture: "delete keyframe", action: "removeKeyframe", requestType: "removeKeyframe", backend: "RemoveKeyframe" },
+  { gesture: "drag keyframe", action: "moveKeyframe", requestType: "moveKeyframe", backend: "MoveKeyframe" },
+  { gesture: "keyframe interpolation menu", action: "setKeyframeInterpolation", requestType: "setKeyframeInterpolation", backend: "SetKeyframeInterpolation" },
+  { gesture: "color grade commit", action: "setColorGrade", requestType: "setColorGrade", backend: "SetColorGrade" },
+  { gesture: "LUT select, intensity, or remove", action: "setLut", requestType: "setLut", backend: "SetLut" },
+  { gesture: "chroma key commit", action: "setChromaKey", requestType: "setChromaKey", backend: "SetChromaKey" },
+  { gesture: "mask commit", action: "setMasks", requestType: "setMasks", backend: "SetMasks" },
+  { gesture: "effect chain commit", action: "setEffects", requestType: "setEffects", backend: "SetEffects" },
+  { gesture: "loudness analysis apply or reset", action: "setLoudnessNormalization", requestType: "setLoudnessNormalization", backend: "SetLoudnessNormalization" },
+  { gesture: "denoise apply, preview toggle, or reset", action: "setAudioDenoise", requestType: "setAudioDenoise", backend: "SetAudioDenoise" },
+  { gesture: "stabilization analysis apply", action: "analyzeAndApplyStabilization", requestType: "applyStabilization", backend: "ApplyStabilization" },
+  { gesture: "stabilization strength or crop", action: "adjustStabilization", requestType: "adjustStabilization", backend: "AdjustStabilization" },
+  { gesture: "stabilization reset", action: "resetStabilization", requestType: "resetStabilization", backend: "ResetStabilization" },
+  { gesture: "transition commit", action: "setTransition", requestType: "setTransition", backend: "SetTransition" },
+  { gesture: "ripple delete range", action: "rippleDeleteRanges", requestType: "rippleDeleteRanges", backend: "RippleDeleteRanges" },
+  { gesture: "shift-delete clips", action: "rippleDeleteClips", requestType: "rippleDeleteClips", backend: "RippleDeleteClips" },
+  { gesture: "place text batch", action: "addTexts", requestType: "addTexts", backend: "AddTexts" },
+  { gesture: "toolbar text", action: "addTextsAutoTrack", requestType: "addTextsAutoTrack", backend: "AddTextsAutoTrack" },
+  { gesture: "generate captions", action: "addCaptions", requestType: "addCaptions", backend: "AddCaptions" },
+  { gesture: "link selection", action: "linkClips", requestType: "link", backend: "Link" },
+  { gesture: "unlink selection", action: "unlinkClips", requestType: "unlink", backend: "Unlink" },
+  { gesture: "delete tracks", action: "removeTracks", requestType: "removeTracks", backend: "RemoveTracks" },
+  { gesture: "move track row", action: "swapTracks", requestType: "swapTracks", backend: "SwapTracks" },
+  { gesture: "exchange clip positions", action: "swapClips", requestType: "swapClips", backend: "SwapClips" },
+  { gesture: "insert track drop zone", action: "insertTrack", requestType: "insertTrack", backend: "InsertTrack" },
+  { gesture: "track header toggle", action: "setTrackProps", requestType: "setTrackProps", backend: "SetTrackProps" },
+  { gesture: "create media folder", action: "createFolder", requestType: "createFolder", backend: "CreateFolder" },
+  { gesture: "move media to folder", action: "moveToFolder", requestType: "moveToFolder", backend: "MoveToFolder" },
+  { gesture: "rename media", action: "renameMedia", requestType: "renameMedia", backend: "RenameMedia" },
+  { gesture: "rename folder", action: "renameFolder", requestType: "renameFolder", backend: "RenameFolder" },
+  { gesture: "delete media", action: "deleteMedia", requestType: "deleteMedia", backend: "DeleteMedia" },
+  { gesture: "delete media folder", action: "deleteFolder", requestType: "deleteFolder", backend: "DeleteFolder" },
+  { gesture: "swap source media", action: "swapMedia", requestType: "swapMedia", backend: "SwapMedia" },
+  { gesture: "reset transform", action: "resetTransform", requestType: "resetTransform", backend: "ResetTransform" },
+  { gesture: "project settings commit", action: "setTimelineSettings", requestType: "setTimelineSettings", backend: "SetTimelineSettings" },
+] as const satisfies ReadonlyArray<{
+  gesture: string;
+  action: string;
+  requestType: EditRequest["type"];
+  backend: string;
+}>;
+
+type RoutedEditRequestType = (typeof EDIT_GESTURE_COMMAND_MATRIX)[number]["requestType"];
+type MissingEditRequestType = Exclude<EditRequest["type"], RoutedEditRequestType>;
+export const EDIT_GESTURE_COMMAND_MATRIX_IS_EXHAUSTIVE: [MissingEditRequestType] extends [never]
+  ? true
+  : never = true;
+
+export function currentTimeline(): Timeline {
+  const root = useProjectStore.getState().timeline;
+  const sequenceId = useEditorUiStore.getState().activeNestedSequenceId;
+  return root.nestedSequences?.find((sequence) => sequence.id === sequenceId)?.timeline ?? root;
+}
+
+/** End frame of the timeline currently shown in the editor. Nested timeline
+ *  transport and paste placement must not inherit the root sequence duration. */
+export function currentTimelineEndFrame(): number {
+  let end = 0;
+  for (const track of currentTimeline().tracks) {
+    for (const clip of track.clips) end = Math.max(end, clip.startFrame + clip.durationFrames);
+  }
+  return end;
+}
+
+const ROOT_SCOPED_EDIT_REQUEST_TYPES = new Set<EditRequest["type"]>([
+  "createNestedSequence",
+  "editNestedSequence",
+  "renameNestedSequence",
+  "dissolveNestedSequence",
+  "createFolder",
+  "moveToFolder",
+  "renameMedia",
+  "renameFolder",
+  "deleteMedia",
+  "deleteFolder",
+  "setTimelineSettings",
+]);
+
+async function applyAndRefresh(
+  cmd: Parameters<typeof api.editApply>[0],
+  options: { root?: boolean } = {},
+) {
+  const sequenceId = useEditorUiStore.getState().activeNestedSequenceId;
+  const targetsRoot = options.root || ROOT_SCOPED_EDIT_REQUEST_TYPES.has(cmd.type);
+  const request =
+    sequenceId && !targetsRoot
+      ? ({ type: "editNestedSequence", sequenceId, command: cmd } as const)
+      : cmd;
+  const res = await api.editApply(request);
   // Tauri pushes timeline_changed -> sync re-fetches. The browser fallback has
   // no event channel, so refresh explicitly there.
   if (!isTauri && res.changed) await forceRefresh();
   return res;
 }
 
+export async function createNestedSequence(name = "Compound clip") {
+  const clipIds = Array.from(useEditorUiStore.getState().selectedClipIds);
+  if (clipIds.length === 0) return;
+  const result = await applyAndRefresh({ type: "createNestedSequence", name, clipIds }, { root: true });
+  if (result.affectedClipIds[0]) {
+    useEditorUiStore.getState().selectClips(new Set([result.affectedClipIds[0]]));
+  }
+  return result;
+}
+
+export async function renameNestedSequence(sequenceId: string, name: string) {
+  return applyAndRefresh({ type: "renameNestedSequence", sequenceId, name }, { root: true });
+}
+
+export async function editNestedSequence(sequenceId: string, command: EditRequest) {
+  return applyAndRefresh({ type: "editNestedSequence", sequenceId, command }, { root: true });
+}
+
+export async function dissolveNestedSequence(clipId: string) {
+  return applyAndRefresh({ type: "dissolveNestedSequence", clipId }, { root: true });
+}
+
 export async function addClips(entries: ClipEntryReq[]) {
   if (entries.length === 0) return;
   return applyAndRefresh({ type: "addClips", entries });
 }
 
+/** Place prepared text clips on explicit tracks as one edit transaction. */
+export async function addTexts(entries: TextEntryReq[]) {
+  if (entries.length === 0) return;
+  return applyAndRefresh({ type: "addTexts", entries });
+}
+
+/** Place prepared text clips on one fresh top track as one edit transaction. */
+export async function addTextsAutoTrack(entries: TextAutoTrackEntryReq[]) {
+  if (entries.length === 0) return;
+  return applyAndRefresh({ type: "addTextsAutoTrack", entries });
+}
+
 /** Ripple-insert clips at `atFrame` on `trackIndex`: place the entries and push
  *  everything past the insert point right by their total duration on the target
  *  track + every sync-locked track (backend `InsertClips` / upstream
@@ -172,6 +324,11 @@ export async function setColorGrade(clipIds: string[], grade: ColorGradeInput |
   await applyAndRefresh({ type: "setColorGrade", clipIds, grade });
 }
 
+export async function setLut(clipIds: string[], lut: LutReference | null) {
+  if (clipIds.length === 0) return;
+  await applyAndRefresh({ type: "setLut", clipIds, lut });
+}
+
 export async function setChromaKey(clipIds: string[], chromaKey: ChromaKeyInput | null) {
   if (clipIds.length === 0) return;
   await applyAndRefresh({ type: "setChromaKey", clipIds, chromaKey });
@@ -187,6 +344,86 @@ export async function setEffects(clipIds: string[], effects: EffectInput[]) {
   await applyAndRefresh({ type: "setEffects", clipIds, effects });
 }
 
+export async function setLoudnessNormalization(
+  clipId: string,
+  normalization: LoudnessNormalization | null,
+) {
+  await applyAndRefresh({ type: "setLoudnessNormalization", clipId, normalization });
+}
+
+export async function analyzeAndApplyLoudness(
+  clipId: string,
+  targetLufs: number,
+  truePeakCeilingDbtp: number,
+) {
+  const normalization = await api.analyzeLoudness(clipId, targetLufs, truePeakCeilingDbtp);
+  await setLoudnessNormalization(clipId, normalization);
+  return normalization;
+}
+
+export async function cancelLoudnessAnalysis() {
+  return api.cancelLoudnessAnalysis();
+}
+
+export async function setAudioDenoise(clipId: string, denoise: AudioDenoise | null) {
+  await applyAndRefresh({ type: "setAudioDenoise", clipId, denoise });
+}
+
+export async function prepareAndApplyAudioDenoise(
+  clipId: string,
+  mode: DenoiseMode,
+  strength: number,
+  previewEnabled: boolean,
+) {
+  const denoise = await api.prepareDenoise(clipId, mode, strength, previewEnabled);
+  await setAudioDenoise(clipId, denoise);
+  return denoise;
+}
+
+export async function cancelDenoiseAnalysis() {
+  return api.cancelDenoiseAnalysis();
+}
+
+export async function applyStabilization(clipId: string, solution: StabilizationTrack) {
+  await applyAndRefresh({ type: "applyStabilization", clipId, solution });
+}
+
+export async function analyzeAndApplyStabilization(clipId: string) {
+  const solution = await api.analyzeStabilization(clipId);
+  await applyStabilization(clipId, solution);
+  return solution;
+}
+
+export async function cancelStabilizationAnalysis() {
+  return api.cancelStabilizationAnalysis();
+}
+
+export async function adjustStabilization(
+  clipId: string,
+  adjustment: { strength?: number; cropMargin?: number },
+) {
+  await applyAndRefresh({ type: "adjustStabilization", clipId, ...adjustment });
+}
+
+export async function resetStabilization(clipId: string) {
+  await applyAndRefresh({ type: "resetStabilization", clipId });
+}
+
+export async function setTransition(
+  fromClipId: string,
+  toClipId: string,
+  kind: TransitionKind | null,
+  durationFrames: number,
+) {
+  await applyAndRefresh({
+    type: "setTransition",
+    fromClipId,
+    toClipId,
+    kind,
+    durationFrames,
+  });
+}
+
 /** Inspector Transform section "Reset" button (upstream `transformHeader`
  *  onReset). Resets transform to identity, opacity to full, clears the
  *  opacity/position/scale/rotation keyframe tracks, and zeroes both fades.
@@ -200,7 +437,7 @@ export async function resetTransform(clipIds: string[]) {
  *  Quality badge menus (upstream `applyTimelineSettings`). When FPS changes the
  *  Rust engine rescales all clip frames; width/height set the canvas. */
 export async function setTimelineSettings(fps: number, width: number, height: number) {
-  await applyAndRefresh({ type: "setTimelineSettings", fps, width, height });
+  return applyAndRefresh({ type: "setTimelineSettings", fps, width, height });
 }
 
 export async function linkClips(clipIds: string[]) {
@@ -218,6 +455,12 @@ export async function unlinkClips(clipIds: string[]) {
   await applyAndRefresh({ type: "unlink", clipIds });
 }
 
+/** Remove one or more tracks in a single undoable edit. */
+export async function removeTracks(trackIndexes: number[]) {
+  if (trackIndexes.length === 0) return;
+  await applyAndRefresh({ type: "removeTracks", trackIndexes });
+}
+
 /** Toggle a track head's mute / hide / sync-lock. Omitted fields are unchanged. */
 export async function setTrackProps(
   trackIndex: number,
@@ -297,6 +540,12 @@ export async function rippleDeleteRanges(trackIndex: number, ranges: FrameRangeR
   await applyAndRefresh({ type: "rippleDeleteRanges", trackIndex, ranges });
 }
 
+/** Ripple-delete selected clips as one atomic/undoable request. */
+export async function rippleDeleteClips(clipIds: string[]) {
+  if (clipIds.length === 0) return;
+  await applyAndRefresh({ type: "rippleDeleteClips", clipIds });
+}
+
 /** Create a media-library folder (optionally nested under `parentFolderId`). */
 export async function createFolder(name: string, parentFolderId?: string) {
   await applyAndRefresh({ type: "createFolder", name, parentFolderId });
@@ -337,11 +586,12 @@ export async function swapMedia(clipId: string, mediaRef: string) {
 
 export async function applyAutomationCommands(commands: EditRequest[]) {
   if (commands.length === 0) return [];
-  const results = [];
-  for (const command of commands) {
-    results.push(await applyAndRefresh(command));
+  if (commands.length !== 1) {
+    throw new Error(
+      "Automation writes must arrive as one atomic EditRequest; multi-command batches are refused",
+    );
   }
-  return results;
+  return [await applyAndRefresh(commands[0])];
 }
 
 export async function applySmartReframe(clipIds: string[], crop: Crop, transform?: Transform) {
@@ -383,7 +633,7 @@ export async function splitAtPlayhead() {
   let ids = selected;
   if (ids.length === 0) {
     // No selection: target every clip the playhead currently intersects.
-    const timeline = useProjectStore.getState().timeline;
+    const timeline = currentTimeline();
     ids = [];
     for (const track of timeline.tracks) {
       for (const c of track.clips) {
@@ -405,7 +655,7 @@ function clipsUnderPlayhead(): Clip[] {
   const selected = new Set(ui.selectedClipIds);
   const restrict = selected.size > 0;
   const out: Clip[] = [];
-  for (const track of useProjectStore.getState().timeline.tracks) {
+  for (const track of currentTimeline().tracks) {
     for (const c of track.clips) {
       if (frame <= c.startFrame || frame >= c.startFrame + c.durationFrames) continue;
       if (restrict && !selected.has(c.id)) continue;
@@ -436,7 +686,7 @@ export async function trimEndToPlayhead() {
  *  to live ids first is what makes ⌫ reliably delete. */
 function liveSelectedClipIds(): string[] {
   const live = new Set<string>();
-  for (const track of useProjectStore.getState().timeline.tracks) {
+  for (const track of currentTimeline().tracks) {
     for (const clip of track.clips) live.add(clip.id);
   }
   return [...useEditorUiStore.getState().selectedClipIds].filter((id) => live.has(id));
@@ -565,7 +815,7 @@ export async function rippleDeleteSelectedClips() {
   const ids = liveSelectedClipIds();
   if (ids.length > 0) {
     try {
-      await applyAndRefresh({ type: "rippleDeleteClips", clipIds: ids });
+      await rippleDeleteClips(ids);
       if (isTauri) await forceRefresh();
     } catch (err) {
       ui.pushToast(`删除失败 / Delete failed: ${err instanceof Error ? err.message : String(err)}`);
@@ -588,7 +838,7 @@ export async function rippleDeleteMarkedRange(): Promise<boolean> {
   // Anchor = the selected clip's track (upstream `rippleDeleteRanges(anchorClipId:)`).
   const anchorId = liveSelectedClipIds()[0];
   if (!anchorId) return false;
-  const timeline = useProjectStore.getState().timeline;
+  const timeline = currentTimeline();
   let trackIndex = -1;
   for (let ti = 0; ti < timeline.tracks.length && trackIndex < 0; ti++) {
     if (timeline.tracks[ti].clips.some((c) => c.id === anchorId)) trackIndex = ti;
@@ -615,7 +865,7 @@ export async function rippleDeleteSelectedGap(): Promise<boolean> {
   const gap = ui.selectedGap;
   if (!gap || gap.endFrame <= gap.startFrame) return false;
   // Guard: an out-of-band edit may have filled the gap (upstream re-checks).
-  const timeline = useProjectStore.getState().timeline;
+  const timeline = currentTimeline();
   const track = timeline.tracks[gap.trackIndex];
   if (
     !track ||
@@ -642,7 +892,7 @@ export async function rippleDeleteSelectedGap(): Promise<boolean> {
 export async function nudgeSelectedClips(deltaFrames: number) {
   const ui = useEditorUiStore.getState();
   if (ui.selectedClipIds.size === 0) return;
-  const timeline = useProjectStore.getState().timeline;
+  const timeline = currentTimeline();
   // Linked partners travel together (the backend moveClips does NOT auto-expand
   // link groups — the drag path expands them too).
   const expanded = expandLinkGroup(timeline, ui.selectedClipIds);
@@ -657,13 +907,29 @@ export async function nudgeSelectedClips(deltaFrames: number) {
  *  ≈ 5s) since they have no intrinsic length. */
 const DEFAULT_IMAGE_SECONDS = 5;
 
+/** Match Rust's positive `f64 as i32` frame conversion: truncate toward zero,
+ *  return a finite integer, and keep duration-bearing UI objects visible for at
+ *  least one frame. Callers choose any source-duration fallback first. */
+function durationSecondsToFrames(seconds: number, fps: number): number {
+  const frames = seconds * fps;
+  return Number.isFinite(frames) ? Math.max(1, Math.trunc(frames)) : 1;
+}
+
+/** Same conversion for offsets, where frame zero is valid. */
+function offsetSecondsToFrames(seconds: number, fps: number): number {
+  const frames = seconds * fps;
+  return Number.isFinite(frames) ? Math.trunc(frames) : 0;
+}
+
 /** Frame length a media item occupies when placed on the timeline: its source
  *  duration (seconds → frames), or the still-image default when it has none.
  *  Shared by the clip-entry builders and the drop-ghost preview so the ghost
  *  width matches the clip that actually lands. */
 export function mediaDurationFrames(item: MediaItem, fps: number): number {
-  const seconds = item.duration > 0 ? item.duration : DEFAULT_IMAGE_SECONDS;
-  return Math.max(1, Math.round(seconds * fps));
+  const seconds = Number.isFinite(item.duration) && item.duration > 0
+    ? item.duration
+    : DEFAULT_IMAGE_SECONDS;
+  return durationSecondsToFrames(seconds, fps);
 }
 
 function isVisual(type: MediaItem["type"]): boolean {
@@ -814,6 +1080,26 @@ function enqueueMediaAdd(run: () => Promise<void>): Promise<void> {
   return result;
 }
 
+async function applyProjectSettings(settings: ProjectSettingsTarget): Promise<void> {
+  const result = await setTimelineSettings(settings.fps, settings.width, settings.height);
+  if (isTauri && result.changed) await forceRefresh();
+}
+
+async function reconcileProjectSettings(item: MediaItem): Promise<void> {
+  const timeline = currentTimeline();
+  const decision = checkProjectSettings(timeline, [item]);
+  if (decision.kind === "proceed") return;
+  if (decision.kind === "apply") {
+    await applyProjectSettings(decision.settings);
+    return;
+  }
+  const applySuggested = await useEditorUiStore.getState().requestProjectSettingsPrompt({
+    current: { fps: timeline.fps, width: timeline.width, height: timeline.height },
+    suggested: decision.settings,
+  });
+  if (applySuggested) await applyProjectSettings(decision.settings);
+}
+
 /** Add a media-library item to the timeline (drag-drop / double-click from the
  *  media panel). Resolves the target track and append position from the current
  *  mirror; if the timeline has no compatible track (e.g. a brand-new empty
@@ -848,7 +1134,7 @@ export interface SourceRange {
 /** Frames a moment clip occupies on the timeline for a source `[startSec,endSec)`
  *  range: the range length in frames, clamped to at least one frame. */
 export function momentDurationFrames(range: SourceRange, fps: number): number {
-  return Math.max(1, Math.round((range.endSec - range.startSec) * fps));
+  return durationSecondsToFrames(range.endSec - range.startSec, fps);
 }
 
 /** Place only `range` of `item` on the timeline at `startFrame` — a trimmed clip
@@ -869,13 +1155,14 @@ export function addMomentToTimelineAt(
 }
 
 async function addMediaToTimelineInner(item: MediaItem): Promise<void> {
-  let timeline = useProjectStore.getState().timeline;
+  await reconcileProjectSettings(item);
+  let timeline = currentTimeline();
   if (firstCompatibleTrackIndex(timeline, item.type) === null) {
     await insertTrack(item.type === "audio" ? "audio" : "video");
     // Ensure the mirror reflects the new track before computing the entry
     // (Tauri's timeline_changed refresh is async; force it synchronously here).
     await forceRefresh();
-    timeline = useProjectStore.getState().timeline;
+    timeline = currentTimeline();
   }
   const entry = entryForMedia(timeline, item);
   if (!entry) return;
@@ -899,11 +1186,12 @@ async function addMediaToTimelineAtInner(
   preferredTrackIndex: number | null,
   insertTrackAt?: number,
 ): Promise<void> {
-  let timeline = useProjectStore.getState().timeline;
+  await reconcileProjectSettings(item);
+  let timeline = currentTimeline();
   if (insertTrackAt !== undefined) {
     const res = await insertTrack(item.type === "audio" ? "audio" : "video", insertTrackAt);
     await forceRefresh();
-    timeline = useProjectStore.getState().timeline;
+    timeline = currentTimeline();
     const insertedTrackId = res?.affectedClipIds[0];
     const insertedIndex = insertedTrackId
       ? timeline.tracks.findIndex((track) => track.id === insertedTrackId)
@@ -915,7 +1203,7 @@ async function addMediaToTimelineAtInner(
     const fallbackInsertAt = preferredTrackIndex ?? undefined;
     const res = await insertTrack(item.type === "audio" ? "audio" : "video", fallbackInsertAt);
     await forceRefresh();
-    timeline = useProjectStore.getState().timeline;
+    timeline = currentTimeline();
     const insertedTrackId = res?.affectedClipIds[0];
     const insertedIndex = insertedTrackId
       ? timeline.tracks.findIndex((track) => track.id === insertedTrackId)
@@ -950,7 +1238,10 @@ function entryForMomentAt(
 ): ClipEntryReq | null {
   const fps = timeline.fps;
   const totalSource = mediaDurationFrames(item, fps);
-  const trimStartFrame = Math.max(0, Math.min(totalSource, Math.round(range.startSec * fps)));
+  const trimStartFrame = Math.max(
+    0,
+    Math.min(totalSource, offsetSecondsToFrames(range.startSec, fps)),
+  );
   const rangeFrames = momentDurationFrames(range, fps);
   // Clamp the visible span so trimStart + duration never exceed the source.
   const durationFrames = Math.max(1, Math.min(rangeFrames, totalSource - trimStartFrame));
@@ -991,11 +1282,12 @@ async function addMomentToTimelineAtInner(
     return addMediaToTimelineAtInner(item, startFrame, preferredTrackIndex, insertTrackAt);
   }
 
-  let timeline = useProjectStore.getState().timeline;
+  await reconcileProjectSettings(item);
+  let timeline = currentTimeline();
   if (insertTrackAt !== undefined) {
     const res = await insertTrack(item.type === "audio" ? "audio" : "video", insertTrackAt);
     await forceRefresh();
-    timeline = useProjectStore.getState().timeline;
+    timeline = currentTimeline();
     const insertedTrackId = res?.affectedClipIds[0];
     const insertedIndex = insertedTrackId
       ? timeline.tracks.findIndex((track) => track.id === insertedTrackId)
@@ -1007,7 +1299,7 @@ async function addMomentToTimelineAtInner(
     const fallbackInsertAt = preferredTrackIndex ?? undefined;
     const res = await insertTrack(item.type === "audio" ? "audio" : "video", fallbackInsertAt);
     await forceRefresh();
-    timeline = useProjectStore.getState().timeline;
+    timeline = currentTimeline();
     const insertedTrackId = res?.affectedClipIds[0];
     const insertedIndex = insertedTrackId
       ? timeline.tracks.findIndex((track) => track.id === insertedTrackId)
@@ -1082,9 +1374,9 @@ const DEFAULT_TEXT_STYLE: TextStyle = {
 export async function addTextClip() {
   const ui = useEditorUiStore.getState();
   const startFrame = ui.activeFrame;
-  const timeline = useProjectStore.getState().timeline;
+  const timeline = currentTimeline();
 
-  const durationFrames = Math.max(1, Math.round(DEFAULT_TEXT_SECONDS * timeline.fps));
+  const durationFrames = durationSecondsToFrames(DEFAULT_TEXT_SECONDS, timeline.fps);
   const entry: TextAutoTrackEntryReq = {
     startFrame,
     durationFrames,
@@ -1093,7 +1385,7 @@ export async function addTextClip() {
     transform: DEFAULT_TEXT_TRANSFORM,
   };
 
-  const res = await applyAndRefresh({ type: "addTextsAutoTrack", entries: [entry] });
+  const res = await addTextsAutoTrack([entry]);
   // Tauri's timeline_changed event refreshes the mirror asynchronously; force
   // it synchronously so the mirror (and any caller reading it right after,
   // e.g. selection logic elsewhere) reflects the new track immediately —
@@ -1141,7 +1433,7 @@ export async function generateCaptions(request: CaptionRequest) {
  *  linked companions, so a paste reproduces the video+audio pair). */
 export function copyClips() {
   const ui = useEditorUiStore.getState();
-  const tl = useProjectStore.getState().timeline;
+  const tl = currentTimeline();
   const ids = ui.selectedClipIds;
   if (ids.size === 0) return;
   // Expand selection to include linked companions.
@@ -1187,7 +1479,7 @@ export async function pasteClipsAtPlayhead() {
   const cb = useClipboardStore.getState();
   if (!cb.hasContent || cb.entries.length === 0) return;
   const ui = useEditorUiStore.getState();
-  const tl = useProjectStore.getState().timeline;
+  const tl = currentTimeline();
   const offset = ui.activeFrame - cb.sourceFirstFrame;
   const entries: ClipEntryReq[] = [];
   const sourceLinkGroups: (string | undefined)[] = [];
@@ -1213,25 +1505,29 @@ export async function pasteClipsAtPlayhead() {
     sourceLinkGroups.push(e.clip.linkGroupId);
   }
   if (entries.length === 0) return;
-  const res = await addClips(entries);
-  if (!res || res.affectedClipIds.length === 0) return;
-
-  // Re-establish link groups: map each old linkGroupId to the set of newly
-  // created clip ids, then call linkClips for each group.
-  const newGroupMap = new Map<string, string[]>();
-  for (let i = 0; i < res.affectedClipIds.length && i < sourceLinkGroups.length; i++) {
-    const oldGroup = sourceLinkGroups[i];
-    if (!oldGroup) continue;
-    const newId = res.affectedClipIds[i];
-    const arr = newGroupMap.get(oldGroup);
-    if (arr) arr.push(newId);
-    else newGroupMap.set(oldGroup, [newId]);
-  }
-  for (const ids of newGroupMap.values()) {
-    if (ids.length >= 2) await linkClips(ids);
-  }
+  try {
+    const res = await addClips(entries);
+    if (!res || res.affectedClipIds.length === 0) return;
+
+    // Re-establish link groups: map each old linkGroupId to the set of newly
+    // created clip ids, then call linkClips for each group.
+    const newGroupMap = new Map<string, string[]>();
+    for (let i = 0; i < res.affectedClipIds.length && i < sourceLinkGroups.length; i++) {
+      const oldGroup = sourceLinkGroups[i];
+      if (!oldGroup) continue;
+      const newId = res.affectedClipIds[i];
+      const arr = newGroupMap.get(oldGroup);
+      if (arr) arr.push(newId);
+      else newGroupMap.set(oldGroup, [newId]);
+    }
+    for (const ids of newGroupMap.values()) {
+      if (ids.length >= 2) await linkClips(ids);
+    }
 
-  // Select the freshly pasted clips so the user can immediately move/trim them.
-  ui.selectClips(new Set(res.affectedClipIds));
-  if (isTauri) await forceRefresh();
+    // Select the freshly pasted clips so the user can immediately move/trim them.
+    ui.selectClips(new Set(res.affectedClipIds));
+    if (isTauri) await forceRefresh();
+  } catch (error) {
+    ui.pushToast(t("edit.pasteFailed", { error: String(error) }));
+  }
 }
diff --git a/web/src/store/libraryStore.import.test.ts b/web/src/store/libraryStore.import.test.ts
index 892e8612..8ed1d0de 100644
--- a/web/src/store/libraryStore.import.test.ts
+++ b/web/src/store/libraryStore.import.test.ts
@@ -35,7 +35,7 @@ describe("library import warnings", () => {
 
     const imported = await useLibraryStore.getState().importToProject("library-1");
 
-    expect(imported).toBe("clip.mp4");
+    expect(imported).toMatchObject({ id: "asset-1", name: "clip.mp4" });
     expect(useLibraryStore.getState().lastImportWarning).toEqual(warning);
     expect(refreshMedia).toHaveBeenCalledOnce();
     expect(useEditorUiStore.getState().toast?.message).toBe(
@@ -43,7 +43,7 @@ describe("library import warnings", () => {
     );
   });
 
-  it("keeps the legacy successful return and emits no warning toast", async () => {
+  it("returns the imported asset identity and emits no warning toast", async () => {
     vi.mocked(libraryApi.libraryImportToProject).mockResolvedValue({
       id: "asset-2",
       name: "clean.mp4",
@@ -52,7 +52,7 @@ describe("library import warnings", () => {
 
     const imported = await useLibraryStore.getState().importToProject("library-2");
 
-    expect(imported).toBe("clean.mp4");
+    expect(imported).toMatchObject({ id: "asset-2", name: "clean.mp4" });
     expect(useLibraryStore.getState().lastImportWarning).toBeNull();
     expect(useEditorUiStore.getState().toast).toBeNull();
   });
@@ -73,7 +73,7 @@ describe("library import warnings", () => {
 
     const imported = await useLibraryStore.getState().importToProject("library-3");
 
-    expect(imported).toBe("committed.mp4");
+    expect(imported).toMatchObject({ id: "asset-3", name: "committed.mp4" });
     expect(useLibraryStore.getState().lastImportWarning).toEqual(warning);
     expect(useLibraryStore.getState().error).toBe("mirror refresh failed");
     expect(useEditorUiStore.getState().toast?.message).toBe(
diff --git a/web/src/store/libraryStore.ts b/web/src/store/libraryStore.ts
index f8da6fc5..a62e4ed4 100644
--- a/web/src/store/libraryStore.ts
+++ b/web/src/store/libraryStore.ts
@@ -10,7 +10,7 @@
 
 import { create } from "zustand";
 import * as lib from "../lib/libraryApi";
-import type { LibraryEntry, LibraryImportWarning } from "../lib/libraryApi";
+import type { LibraryEntry, LibraryImport, LibraryImportWarning } from "../lib/libraryApi";
 import { t } from "../i18n";
 import { refreshMedia } from "./mediaStore";
 import { useEditorUiStore } from "./uiStore";
@@ -53,8 +53,8 @@ interface LibraryState {
   categorize: (id: string, category: string | null) => Promise<void>;
   renameCategory: (from: string, to: string | null) => Promise<void>;
   remove: (id: string) => Promise<void>;
-  /** 把库条目导入当前项目;成功后刷新项目媒体目录。返回新资产名(失败返回 null)。 */
-  importToProject: (id: string) => Promise<string | null>;
+  /** 把库条目导入当前项目;成功后刷新项目媒体目录。返回新资产引用(失败返回 null)。 */
+  importToProject: (id: string) => Promise<LibraryImport | null>;
 }
 
 export const useLibraryStore = create<LibraryState>((set, get) => ({
@@ -140,7 +140,7 @@ export const useLibraryStore = create<LibraryState>((set, get) => ({
       // must not turn that success into null or encourage an unsafe retry.
       set({ error: getErrorMessage(error) });
     }
-    return imported.name;
+    return imported;
   },
 }));
 
diff --git a/web/src/store/projectActions.test.ts b/web/src/store/projectActions.test.ts
index 6b05457a..38940657 100644
--- a/web/src/store/projectActions.test.ts
+++ b/web/src/store/projectActions.test.ts
@@ -37,6 +37,7 @@ const srv = vi.hoisted(() => {
     timeline,
     media,
     order,
+    createdPath: null as string | null,
     stopBoundary: vi.fn(async () => order.push("stop")),
     projectOpen: vi.fn(async () => {
       order.push("open");
@@ -49,19 +50,22 @@ const srv = vi.hoisted(() => {
         compatibilityBlockers: [],
       };
     }),
-    projectNew: vi.fn(async () => {
+    projectNew: vi.fn(async (path: string | null = null) => {
       order.push("new");
+      srv.createdPath = path;
       return {
         timeline,
         projectEpoch: 5,
         version: 0,
-        projectPath: null,
+        projectPath: path,
         compatibilityReadOnly: false,
         compatibilityBlockers: [],
       };
     }),
     projectSave: vi.fn(async (path: string | null) => path ?? ""),
+    sampleProjectMaterialize: vi.fn(async () => "/tmp/cache/quick-tutorial/Tutorial.opentake"),
     getMedia: vi.fn(async () => media),
+    openDialog: vi.fn(async () => undefined),
   };
 });
 
@@ -69,12 +73,13 @@ vi.mock("../lib/api", () => ({
   projectOpen: srv.projectOpen,
   projectNew: srv.projectNew,
   projectSave: srv.projectSave,
+  sampleProjectMaterialize: srv.sampleProjectMaterialize,
   getDefaultProjectDir: async () => "",
   getTimeline: async () => ({
     timeline: srv.timeline,
     projectEpoch: 5,
     version: 0,
-    projectPath: null,
+    projectPath: srv.createdPath,
     compatibilityReadOnly: false,
     compatibilityBlockers: [],
   }),
@@ -89,10 +94,17 @@ vi.mock("../components/preview/nativePlaybackSession", () => ({
 
 vi.mock("../lib/dialog", () => ({
   saveDialog: async () => async () => "/tmp/fresh.opentake",
-  openDialog: async () => undefined,
+  openDialog: srv.openDialog,
 }));
 
-import { newProjectAndEnter, openProjectPath, saveCurrentProject } from "./projectActions";
+import {
+  newProjectAndEnter,
+  openProjectPath,
+  openProjectViaDialog,
+  openSampleProject,
+  saveCurrentProject,
+  saveCurrentProjectAs,
+} from "./projectActions";
 import { useEditorUiStore } from "./uiStore";
 import { useMediaStore } from "./mediaStore";
 import { useProjectStore } from "./projectStore";
@@ -102,17 +114,33 @@ import { useI18nStore } from "../i18n";
 describe("openProjectPath", () => {
   beforeEach(() => {
     srv.order.length = 0;
+    srv.createdPath = null;
     srv.stopBoundary.mockClear();
     srv.projectOpen.mockClear();
-    srv.projectNew.mockClear();
+    srv.projectNew.mockReset();
+    srv.projectNew.mockImplementation(async (path: string | null = null) => {
+      srv.order.push("new");
+      srv.createdPath = path;
+      return {
+        timeline: srv.timeline,
+        projectEpoch: 5,
+        version: 0,
+        projectPath: path,
+        compatibilityReadOnly: false,
+        compatibilityBlockers: [],
+      };
+    });
     srv.getMedia.mockReset();
     srv.getMedia.mockImplementation(async () => srv.media);
     srv.projectSave.mockReset();
     srv.projectSave.mockImplementation(async (path: string | null) => path ?? "");
+    srv.openDialog.mockReset();
+    srv.openDialog.mockResolvedValue(undefined);
     useMediaStore.setState({ items: [], folders: [], importing: false, error: null });
     useRecentStore.setState({ recents: [] });
     useProjectStore.setState({ projectPath: null, timelineVersion: 0 });
     useEditorUiStore.setState({ view: "home", toast: null });
+    useI18nStore.setState({ locale: "zh-CN" });
   });
 
   it("refreshes the media mirror after opening a project", async () => {
@@ -132,6 +160,15 @@ describe("openProjectPath", () => {
     expect(useMediaStore.getState().error).toBeNull();
   });
 
+  it("reports a native picker failure before project-open delegation", async () => {
+    srv.openDialog.mockRejectedValueOnce(new Error("picker unavailable"));
+
+    await expect(openProjectViaDialog()).rejects.toThrow("picker unavailable");
+
+    expect(useEditorUiStore.getState().toast?.message).toBe("打开失败：picker unavailable");
+    expect(srv.projectOpen).not.toHaveBeenCalled();
+  });
+
   it("preserves media transient state when project open fails", async () => {
     const oldFolder = { id: "old-folder", name: "Old", parentFolderId: null };
     useMediaStore.setState({
@@ -140,14 +177,18 @@ describe("openProjectPath", () => {
       importing: true,
       error: "old project error",
     });
-    srv.projectOpen.mockRejectedValueOnce(new Error("open failed"));
+    const failure = { code: "engine", message: "project open timed out after 15s" };
+    srv.projectOpen.mockRejectedValueOnce(failure);
 
-    await expect(openProjectPath("/tmp/broken.opentake")).rejects.toThrow("open failed");
+    await expect(openProjectPath("/tmp/broken.opentake")).rejects.toBe(failure);
 
     expect(useMediaStore.getState().importing).toBe(true);
     expect(useMediaStore.getState().error).toBe("old project error");
     expect(useMediaStore.getState().items).toEqual(srv.media.items);
     expect(useMediaStore.getState().folders).toEqual([oldFolder]);
+    expect(useEditorUiStore.getState().toast?.message).toBe(
+      "打开失败：project open timed out after 15s",
+    );
   });
 
   it("clears the old catalog immediately, then installs the opened project catalog", async () => {
@@ -220,9 +261,97 @@ describe("openProjectPath", () => {
     await newProjectAndEnter();
 
     expect(srv.order.slice(0, 2)).toEqual(["stop", "new"]);
+    expect(srv.projectNew).toHaveBeenCalledWith("/tmp/fresh.opentake");
+    expect(srv.projectSave).not.toHaveBeenCalled();
     expect(useProjectStore.getState().projectEpoch).toBe(5);
     expect(useProjectStore.getState().projectPath).toBe("/tmp/fresh.opentake");
   });
+
+  it("preserves the current project when initial creation fails", async () => {
+    const oldTimeline: Timeline = {
+      ...srv.timeline,
+      tracks: [
+        {
+          id: "old-track",
+          type: "video",
+          muted: false,
+          hidden: false,
+          syncLocked: true,
+          clips: [],
+        },
+      ],
+    };
+    useProjectStore.setState({
+      projectEpoch: 3,
+      timelineVersion: 12,
+      timeline: oldTimeline,
+      projectPath: "/tmp/current.opentake",
+      lastSavedVersion: 11,
+    });
+    useMediaStore.setState({ items: srv.media.items, folders: [], error: "old media state" });
+    const failure = { code: "engine", message: "project create timed out after 15s" };
+    srv.projectNew.mockRejectedValueOnce(failure);
+
+    await expect(newProjectAndEnter()).rejects.toBe(failure);
+
+    const project = useProjectStore.getState();
+    expect(project.projectEpoch).toBe(3);
+    expect(project.timelineVersion).toBe(12);
+    expect(project.timeline).toBe(oldTimeline);
+    expect(project.projectPath).toBe("/tmp/current.opentake");
+    expect(useMediaStore.getState().items).toEqual(srv.media.items);
+    expect(useMediaStore.getState().error).toBe("old media state");
+    expect(useEditorUiStore.getState().view).toBe("home");
+    expect(useEditorUiStore.getState().toast?.message).toBe(
+      "创建失败：project create timed out after 15s",
+    );
+    expect(srv.projectSave).not.toHaveBeenCalled();
+  });
+});
+
+describe("openSampleProject", () => {
+  beforeEach(() => {
+    srv.order.length = 0;
+    srv.sampleProjectMaterialize.mockClear();
+    srv.projectOpen.mockClear();
+    srv.projectOpen.mockImplementation(async () => ({
+      timeline: srv.timeline,
+      projectEpoch: 8,
+      version: 2,
+      projectPath: "/tmp/cache/quick-tutorial/Tutorial.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    }));
+    srv.getMedia.mockResolvedValue(srv.media);
+    useRecentStore.setState({
+      recents: [{ path: "/tmp/User.opentake", name: "User", openedAt: 1 }],
+    });
+    useEditorUiStore.setState({ view: "home", toast: null });
+    useI18nStore.setState({ locale: "en" });
+  });
+
+  it("opens a completed tutorial sample without registering its cache path", async () => {
+    await openSampleProject("quick-tutorial", true);
+
+    expect(srv.sampleProjectMaterialize).toHaveBeenCalledWith("quick-tutorial");
+    expect(srv.projectOpen).toHaveBeenCalledWith(
+      "/tmp/cache/quick-tutorial/Tutorial.opentake",
+    );
+    expect(useRecentStore.getState().recents.map(({ name }) => name)).toEqual(["User"]);
+    expect(useEditorUiStore.getState().view).toBe("editor");
+    expect(useEditorUiStore.getState().toast?.message).toContain("Tutorial project opened");
+  });
+
+  it("does not open or mutate recents when materialization fails", async () => {
+    srv.sampleProjectMaterialize.mockRejectedValueOnce(new Error("download failed"));
+
+    await expect(openSampleProject("quick-tutorial", true)).rejects.toThrow("download failed");
+
+    expect(srv.projectOpen).not.toHaveBeenCalled();
+    expect(useRecentStore.getState().recents.map(({ name }) => name)).toEqual(["User"]);
+    expect(useEditorUiStore.getState().view).toBe("home");
+    expect(useEditorUiStore.getState().toast?.message).toContain("download failed");
+  });
 });
 
 describe("saveCurrentProject", () => {
@@ -261,7 +390,14 @@ describe("saveCurrentProject", () => {
       .mockImplementationOnce(() => second.promise);
 
     const saving = saveCurrentProject();
-    useProjectStore.getState().setMirror(srv.timeline, 10, 1);
+    useProjectStore.getState().replaceProjectSnapshot({
+      timeline: srv.timeline,
+      version: 10,
+      projectEpoch: 1,
+      projectPath: "/tmp/unknown.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    });
     first.resolve("/tmp/unknown.opentake");
 
     await vi.waitFor(() => expect(srv.projectSave).toHaveBeenCalledTimes(2));
@@ -338,7 +474,14 @@ describe("saveCurrentProject", () => {
     useProjectStore.setState({ lastSavedVersion: 9 });
 
     const saving = saveCurrentProject();
-    useProjectStore.getState().setMirror(srv.timeline, 9, 1);
+    useProjectStore.getState().replaceProjectSnapshot({
+      timeline: srv.timeline,
+      version: 9,
+      projectEpoch: 1,
+      projectPath: "/tmp/unknown.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    });
     first.reject("stale save failure");
     await saving;
 
@@ -368,7 +511,14 @@ describe("saveCurrentProject", () => {
       compatibilityReadOnly: false,
       compatibilityBlockers: [],
     });
-    useProjectStore.getState().setMirror(srv.timeline, 5, 3);
+    useProjectStore.getState().replaceProjectSnapshot({
+      timeline: srv.timeline,
+      version: 5,
+      projectEpoch: 3,
+      projectPath: "/tmp/unknown.opentake",
+      compatibilityReadOnly: false,
+      compatibilityBlockers: [],
+    });
     first.resolve("/tmp/unknown.opentake");
     await Promise.all([projectASave, staleProjectBSave]);
 
@@ -377,3 +527,54 @@ describe("saveCurrentProject", () => {
     expect(useProjectStore.getState().timelineVersion).toBe(5);
   });
 });
+
+describe("saveCurrentProjectAs", () => {
+  beforeEach(() => {
+    srv.projectSave.mockReset();
+    srv.projectSave.mockImplementation(async (path: string | null) => path ?? "");
+    useRecentStore.setState({ recents: [] });
+    useProjectStore.setState({
+      snapshotMutationRevision: 0,
+      projectEpoch: 1,
+      projectPath: "/tmp/current.opentake",
+      compatibilityReadOnly: false,
+      timelineVersion: 9,
+      lastSavedVersion: 8,
+    });
+    useEditorUiStore.setState({ toast: null });
+    useI18nStore.setState({ locale: "zh-CN" });
+  });
+
+  it("adopts the core-returned Save As path only after publication succeeds", async () => {
+    srv.projectSave.mockResolvedValueOnce("/tmp/canonical-fresh.opentake");
+
+    await saveCurrentProjectAs();
+
+    expect(srv.projectSave).toHaveBeenCalledWith("/tmp/fresh.opentake");
+    expect(useProjectStore.getState().projectPath).toBe("/tmp/canonical-fresh.opentake");
+    expect(useProjectStore.getState().lastSavedVersion).toBe(9);
+    expect(useRecentStore.getState().recents[0]?.path).toBe(
+      "/tmp/canonical-fresh.opentake",
+    );
+  });
+
+  it("preserves the active path and dirty state when Save As fails", async () => {
+    srv.projectSave.mockRejectedValueOnce(new Error("destination denied"));
+
+    await expect(saveCurrentProjectAs()).rejects.toThrow("destination denied");
+
+    expect(useProjectStore.getState().projectPath).toBe("/tmp/current.opentake");
+    expect(useProjectStore.getState().lastSavedVersion).toBe(8);
+    expect(useRecentStore.getState().recents).toEqual([]);
+    expect(useEditorUiStore.getState().toast?.message).toBe("保存失败：destination denied");
+  });
+
+  it("does not open a Save As flow for compatibility read-only projects", async () => {
+    useProjectStore.setState({ compatibilityReadOnly: true });
+
+    await saveCurrentProjectAs();
+
+    expect(srv.projectSave).not.toHaveBeenCalled();
+    expect(useProjectStore.getState().projectPath).toBe("/tmp/current.opentake");
+  });
+});
diff --git a/web/src/store/projectActions.ts b/web/src/store/projectActions.ts
index adf742a0..9a500070 100644
--- a/web/src/store/projectActions.ts
+++ b/web/src/store/projectActions.ts
@@ -34,43 +34,52 @@ function withExt(path: string): string {
  * in-memory session so the UI is still explorable.
  */
 export async function newProjectAndEnter(): Promise<void> {
-  const save = await saveDialog();
-  if (!save) {
+  try {
+    const save = await saveDialog();
+    if (!save) {
+      await stopNativePlaybackForProjectBoundary();
+      const snapshot = await api.projectNew(null);
+      useProjectStore.getState().replaceProjectSnapshot(snapshot);
+      resetProjectMediaState();
+      await forceRefresh();
+      useEditorUiStore.getState().resetProjectRuntimeState();
+      useEditorUiStore.getState().setView("editor");
+      return;
+    }
+
+    const defaultDir = await api.getDefaultProjectDir().catch(() => "");
+    const sep = defaultDir && !defaultDir.endsWith("/") ? "/" : "";
+    const defaultPath = defaultDir
+      ? `${defaultDir}${sep}${t("home.untitled")}.${PROJECT_EXT}`
+      : undefined;
+
+    const chosen = await save({
+      title: t("home.newProject"),
+      defaultPath,
+      filters: [{ name: "OpenTake", extensions: [PROJECT_EXT] }],
+    });
+    if (typeof chosen !== "string") return; // cancelled
+
+    const requestedPath = withExt(chosen);
     await stopNativePlaybackForProjectBoundary();
-    const snapshot = await api.projectNew();
+    // The desktop command persists a separate fresh session first and only
+    // replaces the live project after that bundle can be reopened. A failed
+    // initial save therefore leaves the current project and UI untouched.
+    const snapshot = await api.projectNew(requestedPath);
     useProjectStore.getState().replaceProjectSnapshot(snapshot);
     resetProjectMediaState();
     await forceRefresh();
+    const committedPath = snapshot.projectPath ?? requestedPath;
+    useProjectStore.getState().markSaved();
+    useRecentStore.getState().add(committedPath);
     useEditorUiStore.getState().resetProjectRuntimeState();
     useEditorUiStore.getState().setView("editor");
-    return;
+  } catch (error) {
+    useEditorUiStore
+      .getState()
+      .pushToast(t("project.createFailed", { error: projectLifecycleErrorMessage(error) }));
+    throw error;
   }
-
-  const defaultDir = await api.getDefaultProjectDir().catch(() => "");
-  const sep = defaultDir && !defaultDir.endsWith("/") ? "/" : "";
-  const defaultPath = defaultDir
-    ? `${defaultDir}${sep}${t("home.untitled")}.${PROJECT_EXT}`
-    : undefined;
-
-  const chosen = await save({
-    title: t("home.newProject"),
-    defaultPath,
-    filters: [{ name: "OpenTake", extensions: [PROJECT_EXT] }],
-  });
-  if (typeof chosen !== "string") return; // cancelled
-
-  const path = withExt(chosen);
-  await stopNativePlaybackForProjectBoundary();
-  const snapshot = await api.projectNew();
-  useProjectStore.getState().replaceProjectSnapshot(snapshot);
-  resetProjectMediaState();
-  await api.projectSave(path);
-  await forceRefresh();
-  useProjectStore.getState().setProjectPath(path);
-  useProjectStore.getState().markSaved();
-  useRecentStore.getState().add(path);
-  useEditorUiStore.getState().resetProjectRuntimeState();
-  useEditorUiStore.getState().setView("editor");
 }
 
 interface SaveSnapshot {
@@ -126,7 +135,10 @@ async function runSaveCoordinator(): Promise<void> {
     activeSaveSnapshot = snapshot;
 
     try {
-      await api.projectSave(null);
+      const savedPath = await api.projectSave(null);
+      if (sameProject(snapshot)) {
+        useRecentStore.getState().markSaved(savedPath || snapshot.projectPath);
+      }
     } catch (error) {
       activeSaveSnapshot = null;
       const afterFailure = captureSaveSnapshot();
@@ -182,11 +194,56 @@ export function saveCurrentProject(): Promise<void> {
   return tracked;
 }
 
+/** Save the current project to a newly chosen `.opentake` bundle and adopt that
+ *  path as the live session. The core performs an atomic Save As (including
+ *  project-local media) and only changes its retained root after publication
+ *  succeeds; the front-end mirrors the returned canonical path afterwards. */
+export async function saveCurrentProjectAs(): Promise<void> {
+  const project = useProjectStore.getState();
+  if (!project.projectPath || project.compatibilityReadOnly) return;
+  try {
+    const save = await saveDialog();
+    if (!save) return;
+    const selected = await save({
+      title: t("menu.saveAs"),
+      defaultPath: project.projectPath,
+      filters: [{ name: "OpenTake", extensions: [PROJECT_EXT] }],
+    });
+    if (typeof selected !== "string") return;
+    const committedPath = await api.projectSave(withExt(selected));
+    const current = useProjectStore.getState();
+    current.setProjectPath(committedPath);
+    useProjectStore.getState().markSaved();
+    useRecentStore.getState().add(committedPath);
+  } catch (error) {
+    useEditorUiStore.getState().pushToast(
+      t("project.saveFailed", { error: projectLifecycleErrorMessage(error) }),
+    );
+    throw error;
+  }
+}
+
 /** Open `path` (a `.opentake` bundle), refresh the mirror, record it, and enter
  *  the editor. Used by both the dialog flow and the recents list. */
+function projectLifecycleErrorMessage(error: unknown): string {
+  if (error instanceof Error) return error.message;
+  if (typeof error === "object" && error !== null && "message" in error) {
+    const message = (error as { message?: unknown }).message;
+    if (typeof message === "string") return message;
+  }
+  return String(error);
+}
+
 export async function openProjectPath(path: string): Promise<void> {
   await stopNativePlaybackForProjectBoundary();
-  const snap = await api.projectOpen(path);
+  let snap: Awaited<ReturnType<typeof api.projectOpen>>;
+  try {
+    snap = await api.projectOpen(path);
+  } catch (error) {
+    const message = projectLifecycleErrorMessage(error);
+    useEditorUiStore.getState().pushToast(t("project.openFailed", { error: message }));
+    throw error;
+  }
   useProjectStore.getState().replaceProjectSnapshot(snap);
   resetProjectMediaState();
   useProjectStore.getState().markSaved();
@@ -200,13 +257,51 @@ export async function openProjectPath(path: string): Promise<void> {
  *  bundles are directories, so the picker is a directory chooser (mirrors
  *  upstream's package-as-folder open panel). */
 export async function openProjectViaDialog(): Promise<void> {
-  const open = await openDialog();
-  if (!open) {
-    // Browser shell: no file system. Just enter the editor on the demo mirror.
+  let delegatedToProjectOpen = false;
+  try {
+    const open = await openDialog();
+    if (!open) {
+      // Browser shell: no file system. Just enter the editor on the demo mirror.
+      useEditorUiStore.getState().setView("editor");
+      return;
+    }
+    const selected = await open({ directory: true, multiple: false });
+    if (typeof selected !== "string") return; // cancelled
+    delegatedToProjectOpen = true;
+    await openProjectPath(selected);
+  } catch (error) {
+    // openProjectPath reports its own downstream failures. Dialog acquisition
+    // and picker failures happen before delegation, so report them here.
+    if (!delegatedToProjectOpen) {
+      useEditorUiStore.getState().pushToast(
+        t("project.openFailed", { error: projectLifecycleErrorMessage(error) }),
+      );
+    }
+    throw error;
+  }
+}
+
+/** Materialize and open a remote sample without adding its cache path to the
+ * recent-project registry. Tutorial routing is explicit so the Home card can
+ * request the guided variant only after the project has opened successfully. */
+export async function openSampleProject(slug: string, startTutorial: boolean): Promise<void> {
+  try {
+    const path = await api.sampleProjectMaterialize(slug);
+    await stopNativePlaybackForProjectBoundary();
+    const snapshot = await api.projectOpen(path);
+    useProjectStore.getState().replaceProjectSnapshot(snapshot);
+    resetProjectMediaState();
+    useProjectStore.getState().markSaved();
+    await refreshMedia();
+    useEditorUiStore.getState().resetProjectRuntimeState();
     useEditorUiStore.getState().setView("editor");
-    return;
+    if (startTutorial) {
+      useEditorUiStore.getState().pushToast(t("home.tutorialStarted"));
+    }
+  } catch (error) {
+    useEditorUiStore.getState().pushToast(
+      t("home.sampleFailed", { error: projectLifecycleErrorMessage(error) }),
+    );
+    throw error;
   }
-  const selected = await open({ directory: true, multiple: false });
-  if (typeof selected !== "string") return; // cancelled
-  await openProjectPath(selected);
 }
diff --git a/web/src/store/projectStore.schemaCompatibility.test.ts b/web/src/store/projectStore.schemaCompatibility.test.ts
index 8cc8c8aa..3cb1a8f3 100644
--- a/web/src/store/projectStore.schemaCompatibility.test.ts
+++ b/web/src/store/projectStore.schemaCompatibility.test.ts
@@ -49,7 +49,9 @@ describe("project snapshot schema compatibility", () => {
     expect(updates).toEqual([13]);
     expect(state.projectEpoch).toBe(8);
     expect(state.timelineVersion).toBe(13);
-    expect(state.timeline).toBe(UNKNOWN_TIMELINE);
+    expect(state.timeline).toEqual(UNKNOWN_TIMELINE);
+    expect(state.timeline).not.toBe(UNKNOWN_TIMELINE);
+    expect(Object.isFrozen(state.timeline)).toBe(true);
     expect(state.projectPath).toBe("/Volumes/QA/unknown.opentake");
     expect(state.compatibilityReadOnly).toBe(true);
     expect(state.compatibilityBlockers).toEqual(["timeline.tracks[0].futureField"]);
@@ -102,7 +104,9 @@ describe("project snapshot schema compatibility", () => {
 
   it("keeps snapshot mutation revisions monotonic across mirror, path, and clear boundaries", () => {
     const revisions = [useProjectStore.getState().snapshotMutationRevision];
-    useProjectStore.getState().setMirror(UNKNOWN_TIMELINE, 2, 3);
+    useProjectStore.getState().replaceProjectSnapshot(
+      snapshot({ timeline: UNKNOWN_TIMELINE, version: 2, projectEpoch: 3 }),
+    );
     revisions.push(useProjectStore.getState().snapshotMutationRevision);
     useProjectStore.getState().setProjectPath("/tmp/saved.opentake");
     revisions.push(useProjectStore.getState().snapshotMutationRevision);
diff --git a/web/src/store/projectStore.ts b/web/src/store/projectStore.ts
index e68355d5..c2a598e5 100644
--- a/web/src/store/projectStore.ts
+++ b/web/src/store/projectStore.ts
@@ -7,13 +7,25 @@
 import { create } from "zustand";
 import type { RuntimeTimelineSnapshot, Timeline } from "../lib/types";
 
-const EMPTY_TIMELINE: Timeline = {
+function deepFreeze<T>(value: T): T {
+  if (value !== null && typeof value === "object" && !Object.isFrozen(value)) {
+    for (const child of Object.values(value as Record<string, unknown>)) deepFreeze(child);
+    Object.freeze(value);
+  }
+  return value;
+}
+
+function immutableTimeline(timeline: Timeline): Timeline {
+  return deepFreeze(structuredClone(timeline));
+}
+
+const EMPTY_TIMELINE: Timeline = deepFreeze({
   fps: 30,
   width: 1920,
   height: 1080,
   settingsConfigured: false,
   tracks: [],
-};
+});
 
 interface ProjectState {
   /** Monotonic authority boundary for snapshot/path writes; never reset. */
@@ -29,8 +41,8 @@ interface ProjectState {
   lastSavedVersion: number;
   canUndo: boolean;
   canRedo: boolean;
-  /** Replace the mirror (called by the sync layer after get_timeline). */
-  setMirror: (timeline: Timeline, version: number, projectEpoch?: number) => void;
+  /** Replace the whole authoritative snapshot. Same-project versions and
+   * project epochs may only advance; accepted timelines are cloned + frozen. */
   replaceProjectSnapshot: (snapshot: RuntimeTimelineSnapshot) => void;
   clearProjectSnapshot: () => void;
   setProjectPath: (path: string | null) => void;
@@ -51,21 +63,20 @@ export const useProjectStore = create<ProjectState>((set) => ({
   lastSavedVersion: 0,
   canUndo: false,
   canRedo: false,
-  setMirror: (timeline, timelineVersion, projectEpoch) =>
-    set((state) => ({
-      snapshotMutationRevision: state.snapshotMutationRevision + 1,
-      timeline,
-      timelineVersion,
-      projectEpoch: projectEpoch ?? state.projectEpoch,
-    })),
   replaceProjectSnapshot: (snapshot) =>
     set((state) => {
+      if (
+        snapshot.projectEpoch < state.projectEpoch ||
+        (snapshot.projectEpoch === state.projectEpoch && snapshot.version < state.timelineVersion)
+      ) {
+        return state;
+      }
       const projectChanged = state.projectEpoch !== snapshot.projectEpoch;
       return {
         snapshotMutationRevision: state.snapshotMutationRevision + 1,
         projectEpoch: snapshot.projectEpoch,
         timelineVersion: snapshot.version,
-        timeline: snapshot.timeline,
+        timeline: immutableTimeline(snapshot.timeline),
         projectPath: snapshot.projectPath,
         compatibilityReadOnly: snapshot.compatibilityReadOnly,
         compatibilityBlockers: snapshot.compatibilityBlockers,
diff --git a/web/src/store/recentStore.schemaCompatibility.test.ts b/web/src/store/recentStore.schemaCompatibility.test.ts
index d388d828..21841c29 100644
--- a/web/src/store/recentStore.schemaCompatibility.test.ts
+++ b/web/src/store/recentStore.schemaCompatibility.test.ts
@@ -30,7 +30,7 @@ describe("recent project compatibility cleanup", () => {
     });
   });
 
-  it("clears the whole active read-only snapshot when its recent entry is removed", () => {
+  it("clears the whole active read-only snapshot when its recent entry is removed", async () => {
     useProjectStore.setState({
       projectEpoch: 17,
       timelineVersion: 12,
@@ -43,7 +43,7 @@ describe("recent project compatibility cleanup", () => {
       compatibilityBlockers: ["manifest.futureField"],
     });
 
-    useRecentStore.getState().remove(ACTIVE_PATH);
+    await useRecentStore.getState().remove(ACTIVE_PATH);
 
     const state = useProjectStore.getState();
     expect(useRecentStore.getState().recents).toEqual([]);
diff --git a/web/src/store/recentStore.test.ts b/web/src/store/recentStore.test.ts
new file mode 100644
index 00000000..cbf8b517
--- /dev/null
+++ b/web/src/store/recentStore.test.ts
@@ -0,0 +1,81 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, expect, it, vi } from "vitest";
+import type { Timeline } from "../lib/types";
+
+const mocks = vi.hoisted(() => ({
+  projectSave: vi.fn(async () => "/tmp/Metadata.opentake"),
+}));
+
+vi.mock("../lib/api", () => ({
+  isTauri: false,
+  projectSave: mocks.projectSave,
+}));
+
+vi.mock("../components/preview/nativePlaybackSession", () => ({
+  stopNativePlaybackForProjectBoundary: vi.fn(),
+}));
+
+vi.mock("../lib/dialog", () => ({
+  openDialog: vi.fn(),
+  saveDialog: vi.fn(),
+}));
+
+import { saveCurrentProject } from "./projectActions";
+import { useProjectStore } from "./projectStore";
+import { useRecentStore } from "./recentStore";
+
+const TIMELINE: Timeline = {
+  fps: 30,
+  width: 1920,
+  height: 1080,
+  settingsConfigured: true,
+  tracks: [],
+};
+
+beforeEach(() => {
+  localStorage.clear();
+  mocks.projectSave.mockClear();
+  useProjectStore.setState({
+    snapshotMutationRevision: 1,
+    projectEpoch: 7,
+    projectPath: "/tmp/Metadata.opentake",
+    timeline: TIMELINE,
+    timelineVersion: 2,
+    lastSavedVersion: 1,
+  });
+  useRecentStore.setState({
+    recents: [{
+      path: "/tmp/Metadata.opentake",
+      name: "Metadata",
+      openedAt: 1_000,
+      createdAt: 500,
+      modifiedAt: 750,
+      thumbnailPath: null,
+    }],
+  });
+});
+
+it("autosave_and_home_metadata_have_separate_owners", async () => {
+  vi.setSystemTime(6_000);
+  await saveCurrentProject();
+
+  expect(mocks.projectSave).toHaveBeenCalledWith(null);
+  expect(useRecentStore.getState().recents[0]).toMatchObject({
+    openedAt: 1_000,
+    modifiedAt: 6_000,
+    thumbnailPath: "/tmp/Metadata.opentake/thumbnail.jpg",
+  });
+  expect(JSON.parse(localStorage.getItem("recentProjects") ?? "[]")[0]).toMatchObject({
+    modifiedAt: 6_000,
+    thumbnailPath: "/tmp/Metadata.opentake/thumbnail.jpg",
+  });
+
+  vi.setSystemTime(7_000);
+  useRecentStore.getState().add("/tmp/Metadata.opentake");
+  expect(useRecentStore.getState().recents[0]).toMatchObject({
+    openedAt: 7_000,
+    modifiedAt: 6_000,
+    thumbnailPath: "/tmp/Metadata.opentake/thumbnail.jpg",
+  });
+});
diff --git a/web/src/store/recentStore.ts b/web/src/store/recentStore.ts
index 28538ce7..fca0470f 100644
--- a/web/src/store/recentStore.ts
+++ b/web/src/store/recentStore.ts
@@ -1,8 +1,7 @@
 /**
- * Recent-projects list for the Home view. Stores the absolute paths of recently
- * opened `.opentake` bundles (most-recent first, capped) in localStorage — a
- * front-end-only convenience that mirrors upstream `ProjectRegistry`'s recents,
- * without the on-disk thumbnail/metadata index (a later concern).
+ * Home recent-project mirror. The native registry is authoritative in the
+ * desktop app; localStorage remains a compatible startup cache for browser
+ * previews and migrations from older OpenTake builds.
  */
 
 import { create } from "zustand";
@@ -15,6 +14,10 @@ export interface RecentProject {
   path: string;
   name: string;
   openedAt: number; // epoch ms
+  createdAt?: number;
+  modifiedAt?: number;
+  thumbnailPath?: string | null;
+  missing?: boolean;
 }
 
 function load(): RecentProject[] {
@@ -25,8 +28,10 @@ function load(): RecentProject[] {
     const parsed = JSON.parse(raw) as unknown;
     if (!Array.isArray(parsed)) return [];
     return parsed.filter(
-      (e): e is RecentProject =>
-        !!e && typeof e === "object" && typeof (e as RecentProject).path === "string",
+      (entry): entry is RecentProject =>
+        !!entry &&
+        typeof entry === "object" &&
+        typeof (entry as RecentProject).path === "string",
     );
   } catch {
     return [];
@@ -49,60 +54,113 @@ export function projectNameFromPath(path: string): string {
 interface RecentState {
   recents: RecentProject[];
   add: (path: string) => void;
-  remove: (path: string) => void;
+  markSaved: (path: string, modifiedAt?: number, thumbnailPath?: string | null) => void;
+  remove: (path: string) => Promise<void>;
+  reveal: (path: string) => Promise<void>;
+  trash: (path: string) => Promise<void>;
   validateRecents: () => Promise<void>;
 }
 
+function removeLocal(path: string, recents: RecentProject[]): RecentProject[] {
+  return recents.filter((entry) => entry.path !== path);
+}
+
+function hasTauriRuntime(): boolean {
+  return typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
+}
+
+export function projectThumbnailPath(path: string): string {
+  const separator = path.includes("\\") && !path.includes("/") ? "\\" : "/";
+  return `${path.replace(/[\\/]+$/, "")}${separator}thumbnail.jpg`;
+}
+
 export const useRecentStore = create<RecentState>((set, get) => ({
   recents: load(),
   add: (path) => {
+    const openedAt = Date.now();
+    const existing = get().recents.find((entry) => entry.path === path);
     const entry: RecentProject = {
       path,
       name: projectNameFromPath(path),
-      openedAt: Date.now(),
+      openedAt,
+      createdAt: existing?.createdAt ?? openedAt,
+      modifiedAt: existing?.modifiedAt ?? openedAt,
+      thumbnailPath: existing?.thumbnailPath ?? null,
+      missing: false,
     };
-    const next = [entry, ...get().recents.filter((r) => r.path !== path)].slice(0, MAX_RECENTS);
+    const next = [entry, ...get().recents.filter((recent) => recent.path !== path)].slice(
+      0,
+      MAX_RECENTS,
+    );
+    persist(next);
+    set({ recents: next });
+    if (hasTauriRuntime()) {
+      void import("../lib/api")
+        .then(({ homeProjectRegister }) => homeProjectRegister(path, openedAt))
+        .catch((error) => {
+          console.error("Failed to persist recent project registration:", error);
+        });
+    }
+  },
+  markSaved: (path, modifiedAt = Date.now(), thumbnailPath = projectThumbnailPath(path)) => {
+    const next = get().recents.map((entry) => (
+      entry.path === path ? { ...entry, modifiedAt, thumbnailPath } : entry
+    ));
     persist(next);
     set({ recents: next });
   },
-  remove: (path) => {
-    const next = get().recents.filter((r) => r.path !== path);
+  remove: async (path) => {
+    if (hasTauriRuntime()) {
+      const { homeProjectRemove } = await import("../lib/api");
+      await homeProjectRemove(path);
+    }
+    const next = removeLocal(path, get().recents);
     persist(next);
     set({ recents: next });
 
-    // Clear active project from memory if it matches the removed path
-    const projStore = useProjectStore.getState();
-    if (projStore.projectPath === path) {
-      projStore.clearProjectSnapshot();
+    const project = useProjectStore.getState();
+    if (project.projectPath === path) {
+      project.clearProjectSnapshot();
     }
   },
-  validateRecents: async () => {
-    const list = get().recents;
-    if (list.length === 0) return;
-
-    const { isTauri } = await import("../lib/api");
-    if (!isTauri) return;
+  reveal: async (path) => {
+    if (!hasTauriRuntime()) throw new Error("Reveal in file manager requires the desktop app");
+    const { homeProjectReveal } = await import("../lib/api");
+    await homeProjectReveal(path);
+  },
+  trash: async (path) => {
+    if (!hasTauriRuntime()) throw new Error("Move to trash requires the desktop app");
+    const { homeProjectTrash } = await import("../lib/api");
+    await homeProjectTrash(path);
+    const next = removeLocal(path, get().recents);
+    persist(next);
+    set({ recents: next });
 
+    const project = useProjectStore.getState();
+    if (project.projectPath === path) {
+      project.clearProjectSnapshot();
+    }
+  },
+  validateRecents: async () => {
+    const legacy = get().recents;
+    if (!hasTauriRuntime()) return;
     try {
-      const { invoke } = await import("@tauri-apps/api/core");
-      const valid: RecentProject[] = [];
-      for (const entry of list) {
-        try {
-          const exists = await invoke<boolean>("check_path_exists", { path: entry.path });
-          if (exists) {
-            valid.push(entry);
-          }
-        } catch {
-          // If we fail to check, fallback to keeping the project
-          valid.push(entry);
-        }
-      }
-      if (valid.length !== list.length) {
-        persist(valid);
-        set({ recents: valid });
-      }
-    } catch (e) {
-      console.error("Failed to validate recents:", e);
+      const { homeProjectsSync } = await import("../lib/api");
+      const native = await homeProjectsSync(
+        legacy.map(({ path, openedAt, createdAt, modifiedAt, thumbnailPath }) => ({
+          path,
+          openedAt,
+          createdAt,
+          modifiedAt,
+          thumbnailPath,
+        })),
+      );
+      const recents = native.slice(0, MAX_RECENTS);
+      persist(recents);
+      set({ recents });
+    } catch (error) {
+      // A registry read failure must never silently erase a user's Home list.
+      console.error("Failed to synchronize recent projects:", error);
     }
   },
 }));
diff --git a/web/src/store/settingsStore.ts b/web/src/store/settingsStore.ts
index a544c832..4e5dd09d 100644
--- a/web/src/store/settingsStore.ts
+++ b/web/src/store/settingsStore.ts
@@ -8,10 +8,11 @@
  */
 
 import { create } from "zustand";
-import { isTauri } from "../lib/api";
+import { isTauri, setProxyPlaybackEnabled as setProxyPlaybackEnabledNative } from "../lib/api";
 
 export type Theme = "dark" | "light";
 export type ByokProvider =
+  | "codex"
   | "anthropic"
   | "fal"
   | "replicate"
@@ -25,6 +26,7 @@ const LS = {
   defaultImportFolder: "defaultImportFolder",
   byokProvider: "byokProvider",
   windowSize: "windowSize",
+  proxyPlaybackEnabled: "proxyPlaybackEnabled",
 } as const;
 
 function loadTheme(): Theme {
@@ -37,7 +39,8 @@ function loadString(key: string): string | null {
 }
 function loadProvider(): ByokProvider {
   const v = loadString(LS.byokProvider);
-  return v === "fal" ||
+  return v === "codex" ||
+    v === "fal" ||
     v === "replicate" ||
     v === "openai" ||
     v === "elevenlabs" ||
@@ -49,6 +52,10 @@ function loadWindowSize(): WindowSizeOpt {
   if (typeof localStorage === "undefined") return "standard";
   return localStorage.getItem(LS.windowSize) === "compact" ? "compact" : "standard";
 }
+function loadProxyPlaybackEnabled(): boolean {
+  if (typeof localStorage === "undefined") return false;
+  return localStorage.getItem(LS.proxyPlaybackEnabled) === "true";
+}
 function persist(key: string, value: string | null) {
   if (typeof localStorage === "undefined") return;
   if (value === null) localStorage.removeItem(key);
@@ -60,10 +67,12 @@ interface SettingsState {
   defaultImportFolder: string | null;
   byokProvider: ByokProvider;
   windowSize: WindowSizeOpt;
+  proxyPlaybackEnabled: boolean;
   setTheme: (theme: Theme) => void;
   setDefaultImportFolder: (path: string | null) => void;
   setByokProvider: (provider: ByokProvider) => void;
   setWindowSize: (size: WindowSizeOpt) => void;
+  setProxyPlaybackEnabled: (enabled: boolean) => void;
 }
 
 export const useSettingsStore = create<SettingsState>((set) => ({
@@ -71,6 +80,7 @@ export const useSettingsStore = create<SettingsState>((set) => ({
   defaultImportFolder: loadString(LS.defaultImportFolder),
   byokProvider: loadProvider(),
   windowSize: loadWindowSize(),
+  proxyPlaybackEnabled: loadProxyPlaybackEnabled(),
   setTheme: (theme) => {
     persist(LS.theme, theme);
     applyTheme(theme);
@@ -89,6 +99,11 @@ export const useSettingsStore = create<SettingsState>((set) => ({
     void applyWindowSize(windowSize);
     set({ windowSize });
   },
+  setProxyPlaybackEnabled: (proxyPlaybackEnabled) => {
+    persist(LS.proxyPlaybackEnabled, String(proxyPlaybackEnabled));
+    void setProxyPlaybackEnabledNative(proxyPlaybackEnabled);
+    set({ proxyPlaybackEnabled });
+  },
 }));
 
 /** Reflect the theme onto the document root so tokens can switch on it. */
@@ -137,3 +152,7 @@ export function initTheme(): void {
 export function initWindowSize(): void {
   void applyWindowSize(useSettingsStore.getState().windowSize);
 }
+
+export function initProxyPlayback(): void {
+  void setProxyPlaybackEnabledNative(useSettingsStore.getState().proxyPlaybackEnabled);
+}
diff --git a/web/src/store/sync.test.ts b/web/src/store/sync.test.ts
index b65f80df..a63d8d68 100644
--- a/web/src/store/sync.test.ts
+++ b/web/src/store/sync.test.ts
@@ -37,6 +37,7 @@ const srv = vi.hoisted(() => {
     playbackResponses: [] as Array<Promise<void>>,
     order: [] as string[],
     onProjectOpened: null as null | ((path: string, projectEpoch: number, version: number) => Promise<void> | void),
+    onTimelineChanged: null as null | ((projectEpoch: number, version: number) => Promise<void> | void),
     invalidate: vi.fn(async () => {
       srv.order.push("invalidate");
       const queued = srv.playbackResponses.shift();
@@ -71,8 +72,11 @@ vi.mock("../lib/api", () => ({
     srv.redoCalls += 1;
     return (await srv.redoResponses.shift()) ?? false;
   },
-  onTimelineChanged: async () => {
+  onTimelineChanged: async (
+    handler: (projectEpoch: number, version: number) => Promise<void> | void,
+  ) => {
     srv.timelineListenerCalls += 1;
+    srv.onTimelineChanged = handler;
     return (await srv.timelineListenerResponses.shift()) ?? (() => {});
   },
   onProjectOpened: async (
@@ -127,6 +131,7 @@ beforeEach(() => {
   srv.openedListenerCalls = 0;
   srv.mediaError = null;
   srv.projectOpenedHandlers.length = 0;
+  srv.onTimelineChanged = null;
   srv.playbackResponses.length = 0;
   srv.resetMediaTransient.mockClear();
   srv.refreshMedia.mockClear();
@@ -156,10 +161,13 @@ describe("project event sync", () => {
     });
 
     srv.projectPath = "/tmp/snapshot.opentake";
+    srv.snapshotResponses.push(
+      Promise.resolve(snapshot(7, 0, "/tmp/snapshot.opentake")),
+    );
     await srv.onProjectOpened?.("/tmp/event-payload.opentake", 7, 0);
 
     expect(srv.order.slice(0, 2)).toEqual(["invalidate", "refresh"]);
-    expect(useProjectStore.getState().projectEpoch).toBe(1);
+    expect(useProjectStore.getState().projectEpoch).toBe(7);
     expect(useProjectStore.getState().projectPath).toBe("/tmp/snapshot.opentake");
     const ui = useEditorUiStore.getState();
     expect(ui.isPlaying).toBe(false);
@@ -238,6 +246,48 @@ describe("project event sync", () => {
     expect(state.compatibilityReadOnly).toBe(true);
   });
 
+  it("refetches when an event-promised version is newer than the first snapshot", async () => {
+    await startSync();
+    srv.snapshotResponses.push(
+      Promise.resolve(snapshot(1, 1, null)),
+      Promise.resolve(snapshot(1, 2, null)),
+    );
+
+    await srv.onTimelineChanged?.(1, 2);
+
+    expect(useProjectStore.getState().timelineVersion).toBe(2);
+    expect(srv.order.filter((entry) => entry === "refresh")).toHaveLength(3);
+  });
+
+  it("converges to N+2 when N+1 and N+2 event refreshes complete out of order", async () => {
+    await startSync();
+    const n1 = deferred<RuntimeTimelineSnapshot>();
+    const n2 = deferred<RuntimeTimelineSnapshot>();
+    srv.snapshotResponses.push(n1.promise, n2.promise);
+
+    const first = srv.onTimelineChanged?.(1, 1);
+    const second = srv.onTimelineChanged?.(1, 2);
+    n2.resolve(snapshot(1, 2, null));
+    await second;
+    n1.resolve(snapshot(1, 1, null));
+    await first;
+
+    expect(useProjectStore.getState().timelineVersion).toBe(2);
+  });
+
+  it("never publishes a stale snapshot when catch-up retries are exhausted", async () => {
+    await startSync();
+    srv.snapshotResponses.push(
+      Promise.resolve(snapshot(1, 1, null)),
+      Promise.resolve(snapshot(1, 2, null)),
+      Promise.resolve(snapshot(1, 2, null)),
+    );
+
+    await srv.onTimelineChanged?.(1, 3);
+
+    expect(useProjectStore.getState().timelineVersion).toBe(0);
+  });
+
   it("does not let late history results cross a project epoch", async () => {
     const oldUndo = deferred<boolean>();
     const oldRedo = deferred<boolean>();
@@ -444,6 +494,9 @@ describe("project event sync", () => {
     expect(useProjectStore.getState().projectPath).toBe("/tmp/saved.opentake");
 
     srv.projectPath = "/tmp/refreshed.opentake";
+    srv.snapshotResponses.push(
+      Promise.resolve(snapshot(5, 0, "/tmp/refreshed.opentake")),
+    );
     await forceRefresh();
     expect(useProjectStore.getState().projectPath).toBe("/tmp/refreshed.opentake");
   });
diff --git a/web/src/store/sync.ts b/web/src/store/sync.ts
index 53727cf8..857a639d 100644
--- a/web/src/store/sync.ts
+++ b/web/src/store/sync.ts
@@ -15,12 +15,37 @@ let unlistenTimeline: (() => void) | null = null;
 let unlistenOpened: (() => void) | null = null;
 let refreshGeneration = 0;
 let lifecycleGeneration = 0;
+const MAX_SNAPSHOT_CATCHUP_ATTEMPTS = 3;
 
-async function refreshMirror(): Promise<void> {
+interface SnapshotFloor {
+  projectEpoch: number;
+  version: number;
+}
+
+function reachesFloor(
+  snapshot: Awaited<ReturnType<typeof api.getTimeline>>,
+  floor: SnapshotFloor,
+): boolean {
+  return (
+    snapshot.projectEpoch > floor.projectEpoch ||
+    (snapshot.projectEpoch === floor.projectEpoch && snapshot.version >= floor.version)
+  );
+}
+
+async function refreshMirror(floor?: SnapshotFloor): Promise<void> {
   const generation = ++refreshGeneration;
   const mutationRevision = useProjectStore.getState().snapshotMutationRevision;
-  const snap = await api.getTimeline();
-  if (generation !== refreshGeneration) return;
+  let snap: Awaited<ReturnType<typeof api.getTimeline>> | null = null;
+  for (let attempt = 0; attempt < MAX_SNAPSHOT_CATCHUP_ATTEMPTS; attempt += 1) {
+    const candidate = await api.getTimeline();
+    if (generation !== refreshGeneration) return;
+    if (floor && !reachesFloor(candidate, floor)) continue;
+    snap = candidate;
+    break;
+  }
+  // An event promises that core has already reached `floor`. Never publish a
+  // stale response if the transport cannot observe it within the bounded retry.
+  if (!snap) return;
   const beforeCommit = useProjectStore.getState();
   if (beforeCommit.snapshotMutationRevision !== mutationRevision) return;
   beforeCommit.replaceProjectSnapshot(snap);
@@ -62,11 +87,11 @@ export async function startSync(): Promise<void> {
   const timelineUnlisten = await api.onTimelineChanged(async (projectEpoch, version) => {
     if (!lifecycleActive()) return;
     const current = useProjectStore.getState();
-    if (projectEpoch !== current.projectEpoch || version > current.timelineVersion) {
-      if (!lifecycleActive()) return;
-      await refreshMirror();
-      if (!lifecycleActive()) return;
-    }
+    if (projectEpoch < current.projectEpoch) return;
+    if (projectEpoch === current.projectEpoch && version <= current.timelineVersion) return;
+    if (!lifecycleActive()) return;
+    await refreshMirror({ projectEpoch, version });
+    if (!lifecycleActive()) return;
   });
   if (!lifecycleActive()) {
     timelineUnlisten();
@@ -74,11 +99,12 @@ export async function startSync(): Promise<void> {
   }
   unlistenTimeline = timelineUnlisten;
 
-  const openedUnlisten = await api.onProjectOpened(async () => {
+  const openedUnlisten = await api.onProjectOpened(async (_path, projectEpoch, version) => {
     if (!lifecycleActive()) return;
+    if (projectEpoch < useProjectStore.getState().projectEpoch) return;
     await stopNativePlaybackForProjectBoundary();
     if (!lifecycleActive()) return;
-    await refreshMirror();
+    await refreshMirror({ projectEpoch, version });
   });
   if (!lifecycleActive()) {
     openedUnlisten();
diff --git a/web/src/store/uiStore.persistence.test.ts b/web/src/store/uiStore.persistence.test.ts
new file mode 100644
index 00000000..c3b3b3b7
--- /dev/null
+++ b/web/src/store/uiStore.persistence.test.ts
@@ -0,0 +1,150 @@
+// @vitest-environment happy-dom
+
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { createEditorUiStore } from "./uiStore";
+
+const V1 = {
+  layoutPreset: "opentake.ui.v1.layoutPreset",
+  agentPanelVisible: "opentake.ui.v1.agentPanelVisible",
+  mediaPanelVisible: "opentake.ui.v1.mediaPanelVisible",
+  inspectorPanelVisible: "opentake.ui.v1.inspectorPanelVisible",
+  keyframesPanelVisible: "opentake.ui.v1.keyframesPanelVisible",
+  zoomScale: "opentake.ui.v1.zoomScale",
+} as const;
+
+const LEGACY = {
+  layoutPreset: "layoutPreset",
+  agentPanelVisible: "agentPanelVisible",
+  mediaPanelVisible: "mediaPanelVisible",
+  inspectorPanelVisible: "inspectorPanelVisible",
+  keyframesPanelVisible: "keyframesPanelVisible",
+  zoomScale: "zoomScale",
+} as const;
+
+function expectDefaults() {
+  expect(createEditorUiStore().getState()).toMatchObject({
+    view: "home",
+    currentFrame: 0,
+    layoutPreset: "default",
+    agentPanelVisible: false,
+    mediaPanelVisible: true,
+    inspectorPanelVisible: true,
+    keyframesPanelVisible: false,
+  });
+}
+
+beforeEach(() => {
+  vi.restoreAllMocks();
+  localStorage.clear();
+});
+
+describe("uiStore schema-safe persistence", () => {
+  it("schema_safe_layout_panel_and_keyframe_state_survive_restart", () => {
+    expectDefaults();
+
+    localStorage.setItem(V1.layoutPreset, "vertical");
+    localStorage.setItem(V1.agentPanelVisible, "true");
+    localStorage.setItem(V1.mediaPanelVisible, "false");
+    localStorage.setItem(V1.inspectorPanelVisible, "false");
+    localStorage.setItem(V1.keyframesPanelVisible, "true");
+    localStorage.setItem(V1.zoomScale, "8");
+    expect(createEditorUiStore().getState()).toMatchObject({
+      layoutPreset: "vertical",
+      agentPanelVisible: true,
+      mediaPanelVisible: false,
+      inspectorPanelVisible: false,
+      keyframesPanelVisible: true,
+      zoomScale: 8,
+    });
+
+    localStorage.clear();
+    localStorage.setItem(LEGACY.layoutPreset, "media");
+    localStorage.setItem(LEGACY.agentPanelVisible, "true");
+    localStorage.setItem(LEGACY.mediaPanelVisible, "false");
+    localStorage.setItem(LEGACY.inspectorPanelVisible, "false");
+    localStorage.setItem(LEGACY.keyframesPanelVisible, "true");
+    localStorage.setItem(LEGACY.zoomScale, "6");
+    expect(createEditorUiStore().getState()).toMatchObject({
+      layoutPreset: "media",
+      agentPanelVisible: true,
+      mediaPanelVisible: false,
+      inspectorPanelVisible: false,
+      keyframesPanelVisible: true,
+      zoomScale: 6,
+    });
+    for (const key of Object.keys(V1) as Array<keyof typeof V1>) {
+      expect(localStorage.getItem(V1[key])).toBe(localStorage.getItem(LEGACY[key]));
+    }
+
+    localStorage.clear();
+    localStorage.setItem(V1.layoutPreset, "wide");
+    localStorage.setItem(V1.agentPanelVisible, "1");
+    localStorage.setItem(V1.mediaPanelVisible, "yes");
+    localStorage.setItem(V1.inspectorPanelVisible, "FALSE");
+    localStorage.setItem(V1.keyframesPanelVisible, "null");
+    localStorage.setItem(V1.zoomScale, "41");
+    expectDefaults();
+    for (const key of Object.values(V1)) expect(localStorage.getItem(key)).toBeNull();
+
+    localStorage.clear();
+    for (const key of Object.values(LEGACY)) localStorage.setItem(key, "corrupt");
+    expectDefaults();
+    for (const key of Object.values(V1)) expect(localStorage.getItem(key)).toBeNull();
+    for (const key of Object.values(LEGACY)) expect(localStorage.getItem(key)).toBeNull();
+
+    localStorage.clear();
+    const first = createEditorUiStore();
+    const setItem = vi.spyOn(localStorage, "setItem");
+    const writesOnly = (key: string, action: () => void, value: string) => {
+      setItem.mockClear();
+      action();
+      expect(setItem.mock.calls).toEqual([[key, value]]);
+    };
+    writesOnly(V1.layoutPreset, () => first.getState().setLayoutPreset("vertical"), "vertical");
+    writesOnly(V1.agentPanelVisible, () => first.getState().toggleAgentPanel(), "true");
+    writesOnly(V1.mediaPanelVisible, () => first.getState().toggleMediaPanel(), "false");
+    writesOnly(V1.inspectorPanelVisible, () => first.getState().toggleInspectorPanel(), "false");
+    writesOnly(V1.keyframesPanelVisible, () => first.getState().toggleKeyframesPanel(), "true");
+    writesOnly(V1.zoomScale, () => first.getState().setZoomScale(8), "8");
+
+    first.getState().setView("editor");
+    first.getState().setCurrentFrame(120);
+    first.getState().selectClips(new Set(["project-clip"]));
+    const restarted = createEditorUiStore().getState();
+    expect(restarted).toMatchObject({
+      view: "home",
+      currentFrame: 0,
+      activeFrame: 0,
+      maximizedPanel: null,
+      layoutPreset: "vertical",
+      agentPanelVisible: true,
+      mediaPanelVisible: false,
+      inspectorPanelVisible: false,
+      keyframesPanelVisible: true,
+      zoomScale: 8,
+    });
+    expect(restarted.selectedClipIds).toEqual(new Set());
+
+    vi.spyOn(localStorage, "getItem").mockImplementation(() => {
+      throw new DOMException("storage unavailable", "SecurityError");
+    });
+    expectDefaults();
+    vi.restoreAllMocks();
+
+    vi.stubGlobal("localStorage", undefined);
+    expectDefaults();
+    vi.unstubAllGlobals();
+
+    localStorage.clear();
+    const unavailable = createEditorUiStore();
+    vi.spyOn(localStorage, "setItem").mockImplementation(() => {
+      throw new DOMException("quota exceeded", "QuotaExceededError");
+    });
+    expect(() => unavailable.getState().setLayoutPreset("media")).not.toThrow();
+    expect(() => unavailable.getState().toggleAgentPanel()).not.toThrow();
+    expect(unavailable.getState()).toMatchObject({
+      layoutPreset: "media",
+      agentPanelVisible: true,
+    });
+  });
+});
diff --git a/web/src/store/uiStore.ts b/web/src/store/uiStore.ts
index 1590aa33..8ac1263f 100644
--- a/web/src/store/uiStore.ts
+++ b/web/src/store/uiStore.ts
@@ -11,6 +11,10 @@ import { totalFrames } from "../lib/geometry";
 import type { CropAspectLock } from "../lib/cropOverlay";
 import { withRangeStart, withRangeEnd, type TimelineRange } from "../lib/timelineRange";
 import type { GapSelection } from "../lib/timelineGap";
+import { isTauri } from "../lib/api";
+import { t } from "../i18n";
+import type { ProjectSettingsTarget } from "../lib/projectSettings";
+import type { MotionTrackingRegion } from "../lib/types";
 
 export type Panel = "agent" | "media" | "preview" | "inspector" | "timeline";
 /** Top-level app view (SPEC: 启动先进主页). The editor is one of three views;
@@ -18,11 +22,20 @@ export type Panel = "agent" | "media" | "preview" | "inspector" | "timeline";
 export type AppView = "home" | "editor" | "settings" | "library";
 export type ToolMode = "pointer" | "razor";
 export type LayoutPreset = "default" | "media" | "vertical";
-/** 剪映式顶部素材面板主标签（英文标识符，中文文案在 dict）。
- *  目前仅 material/audio 可用，其余为置灰占位（功能未做）。 */
+export type SettingsPaneId =
+  | "general"
+  | "appearance"
+  | "import"
+  | "ai"
+  | "mcp"
+  | "shortcuts"
+  | "account"
+  | "about";
+/** 剪映式顶部素材面板主标签（英文标识符，中文文案在 dict）。 */
 export type MediaTabId =
   | "material"
   | "audio"
+  | "music"
   | "text"
   | "sticker"
   | "effect"
@@ -43,26 +56,95 @@ export interface SaveAsProgressState {
   cancelling: boolean;
 }
 
+export interface ProjectSettingsPromptState {
+  current: ProjectSettingsTarget;
+  suggested: ProjectSettingsTarget;
+}
+
+export interface MotionTrackingSelection {
+  clipId: string;
+  region: MotionTrackingRegion;
+}
+
+const STORAGE_PREFIX = "opentake.ui.v1.";
 const LS = {
-  layoutPreset: "layoutPreset",
-  agentPanelVisible: "agentPanelVisible",
-  mediaPanelVisible: "mediaPanelVisible",
-  inspectorPanelVisible: "inspectorPanelVisible",
-  keyframesPanelVisible: "keyframesPanelVisible",
+  layoutPreset: `${STORAGE_PREFIX}layoutPreset`,
+  agentPanelVisible: `${STORAGE_PREFIX}agentPanelVisible`,
+  mediaPanelVisible: `${STORAGE_PREFIX}mediaPanelVisible`,
+  inspectorPanelVisible: `${STORAGE_PREFIX}inspectorPanelVisible`,
+  keyframesPanelVisible: `${STORAGE_PREFIX}keyframesPanelVisible`,
+  zoomScale: `${STORAGE_PREFIX}zoomScale`,
 } as const;
 
-function loadBool(key: string, fallback: boolean): boolean {
-  if (typeof localStorage === "undefined") return fallback;
-  const v = localStorage.getItem(key);
-  return v === null ? fallback : v === "true";
+type UiStorageKey = (typeof LS)[keyof typeof LS];
+
+const LEGACY_LS: Record<UiStorageKey, string> = {
+  [LS.layoutPreset]: "layoutPreset",
+  [LS.agentPanelVisible]: "agentPanelVisible",
+  [LS.mediaPanelVisible]: "mediaPanelVisible",
+  [LS.inspectorPanelVisible]: "inspectorPanelVisible",
+  [LS.keyframesPanelVisible]: "keyframesPanelVisible",
+  [LS.zoomScale]: "zoomScale",
+};
+
+function readPersisted(key: UiStorageKey): { value: string | null; legacy: boolean } {
+  if (typeof localStorage === "undefined") return { value: null, legacy: false };
+  try {
+    const value = localStorage.getItem(key);
+    if (value !== null) return { value, legacy: false };
+    return { value: localStorage.getItem(LEGACY_LS[key]), legacy: true };
+  } catch {
+    return { value: null, legacy: false };
+  }
+}
+
+function discardPersisted(key: UiStorageKey): void {
+  if (typeof localStorage === "undefined") return;
+  try {
+    localStorage.removeItem(key);
+    localStorage.removeItem(LEGACY_LS[key]);
+  } catch {
+    // Storage may be unavailable; defaults still fail closed for this session.
+  }
+}
+
+function loadBool(key: UiStorageKey, fallback: boolean): boolean {
+  const stored = readPersisted(key);
+  if (stored.value !== "true" && stored.value !== "false") {
+    if (stored.value !== null) discardPersisted(key);
+    return fallback;
+  }
+  if (stored.legacy) persist(key, stored.value);
+  return stored.value === "true";
 }
 function loadPreset(): LayoutPreset {
-  if (typeof localStorage === "undefined") return "default";
-  const v = localStorage.getItem(LS.layoutPreset);
-  return v === "media" || v === "vertical" ? v : "default";
+  const stored = readPersisted(LS.layoutPreset);
+  if (stored.value !== "default" && stored.value !== "media" && stored.value !== "vertical") {
+    if (stored.value !== null) discardPersisted(LS.layoutPreset);
+    return "default";
+  }
+  if (stored.legacy) persist(LS.layoutPreset, stored.value);
+  return stored.value;
+}
+function loadZoomScale(): number {
+  const stored = readPersisted(LS.zoomScale);
+  if (stored.value === null) return ZOOM.default;
+  const value = Number(stored.value);
+  if (!Number.isFinite(value) || value < 0.05 || value > ZOOM.max) {
+    discardPersisted(LS.zoomScale);
+    return ZOOM.default;
+  }
+  if (stored.legacy) persist(LS.zoomScale, String(value));
+  return value;
 }
-function persist(key: string, value: string) {
-  if (typeof localStorage !== "undefined") localStorage.setItem(key, value);
+function persist(key: UiStorageKey, value: string): void {
+  if (typeof localStorage === "undefined") return;
+  try {
+    localStorage.setItem(key, value);
+  } catch {
+    // Sandboxed/private browsing can deny storage. UI state must still update
+    // for the current session and simply fall back to defaults next launch.
+  }
 }
 
 function settledFrame(frame: number): number {
@@ -75,12 +157,19 @@ interface UiState {
   setView: (view: AppView) => void;
   settingsOpen: boolean;
   setSettingsOpen: (open: boolean) => void;
+  settingsPane: SettingsPaneId;
+  openSettingsPane: (pane: SettingsPaneId) => void;
+  setSettingsPane: (pane: SettingsPaneId) => void;
   /** Whether the video-export dialog (§2.4 / #112) is shown. */
   exportDialogOpen: boolean;
   setExportDialogOpen: (open: boolean) => void;
   /** Visible progress owner for clip/range save-as operations. */
   saveAsProgress: SaveAsProgressState | null;
   setSaveAsProgress: (progress: SaveAsProgressState | null) => void;
+  projectSettingsPrompt: ProjectSettingsPromptState | null;
+  projectSettingsPromptResolver: ((applySuggested: boolean) => void) | null;
+  requestProjectSettingsPrompt: (prompt: ProjectSettingsPromptState) => Promise<boolean>;
+  resolveProjectSettingsPrompt: (applySuggested: boolean) => void;
 
   // Playback / playhead
   currentFrame: number;
@@ -110,6 +199,10 @@ interface UiState {
   selectedGap: GapSelection | null;
 
   // Timeline view
+  /** Root-registry sequence currently opened for direct timeline editing. */
+  activeNestedSequenceId: string | null;
+  enterNestedSequence: (sequenceId: string) => void;
+  exitNestedSequence: () => void;
   zoomScale: number;
   minZoomScale: number;
   scrollLeft: number;
@@ -133,10 +226,17 @@ interface UiState {
    *  shows the timeline composite. Mirrors upstream `openPreviewTab(mediaAsset)`. */
   previewMediaId: string | null;
   setPreviewMedia: (id: string | null) => void;
+  /** Active on-canvas subject rectangle for the Inspector motion tracker. */
+  motionTrackingSelection: MotionTrackingSelection | null;
+  setMotionTrackingSelection: (selection: MotionTrackingSelection | null) => void;
+  setMotionTrackingRegion: (region: MotionTrackingRegion) => void;
 
   // Panels
   focusedPanel: Panel | null;
   maximizedPanel: Panel | null;
+  /** Mirrors the desktop/browser window's fullscreen state for the checked View
+   *  menu item. The action always queries the real window before toggling. */
+  fullscreen: boolean;
   layoutPreset: LayoutPreset;
   agentPanelVisible: boolean;
   mediaPanelVisible: boolean;
@@ -218,6 +318,9 @@ interface UiState {
 
   focusPanel: (panel: Panel) => void;
   setMaximizedPanel: (panel: Panel | null) => void;
+  toggleMaximizedFocusedPanel: () => void;
+  syncFullscreen: () => Promise<void>;
+  toggleFullscreen: () => Promise<void>;
   setLayoutPreset: (preset: LayoutPreset) => void;
   toggleAgentPanel: () => void;
   toggleMediaPanel: () => void;
@@ -237,15 +340,30 @@ interface UiState {
   clearToast: () => void;
 }
 
-export const useEditorUiStore = create<UiState>((set, get) => ({
+export const createEditorUiStore = () => create<UiState>((set, get) => ({
   view: "home",
   setView: (view) => set({ view }),
   settingsOpen: false,
   setSettingsOpen: (settingsOpen) => set({ settingsOpen }),
+  settingsPane: "general",
+  openSettingsPane: (settingsPane) => set({ settingsPane, settingsOpen: true }),
+  setSettingsPane: (settingsPane) => set({ settingsPane }),
   exportDialogOpen: false,
   setExportDialogOpen: (exportDialogOpen) => set({ exportDialogOpen }),
   saveAsProgress: null,
   setSaveAsProgress: (saveAsProgress) => set({ saveAsProgress }),
+  projectSettingsPrompt: null,
+  projectSettingsPromptResolver: null,
+  requestProjectSettingsPrompt: (projectSettingsPrompt) =>
+    new Promise<boolean>((resolve) => {
+      get().projectSettingsPromptResolver?.(false);
+      set({ projectSettingsPrompt, projectSettingsPromptResolver: resolve });
+    }),
+  resolveProjectSettingsPrompt: (applySuggested) => {
+    const resolve = get().projectSettingsPromptResolver;
+    set({ projectSettingsPrompt: null, projectSettingsPromptResolver: null });
+    resolve?.(applySuggested);
+  },
 
   currentFrame: 0,
   activeFrame: 0,
@@ -261,7 +379,30 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
   selectedTimelineRange: null,
   selectedGap: null,
 
-  zoomScale: ZOOM.default,
+  activeNestedSequenceId: null,
+  enterNestedSequence: (activeNestedSequenceId) =>
+    set({
+      activeNestedSequenceId,
+      selectedClipIds: new Set(),
+      selectedGap: null,
+      selectedTimelineRange: null,
+      currentFrame: 0,
+      activeFrame: 0,
+      scrollLeft: 0,
+      scrollTop: 0,
+    }),
+  exitNestedSequence: () =>
+    set({
+      activeNestedSequenceId: null,
+      selectedClipIds: new Set(),
+      selectedGap: null,
+      selectedTimelineRange: null,
+      currentFrame: 0,
+      activeFrame: 0,
+      scrollLeft: 0,
+      scrollTop: 0,
+    }),
+  zoomScale: loadZoomScale(),
   minZoomScale: 0.05,
   scrollLeft: 0,
   scrollTop: 0,
@@ -273,9 +414,18 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
   canvasOffset: { width: 0, height: 0 },
   previewQualityShortEdge: null,
   previewMediaId: null,
+  motionTrackingSelection: null,
+  setMotionTrackingSelection: (motionTrackingSelection) => set({ motionTrackingSelection }),
+  setMotionTrackingRegion: (region) =>
+    set((state) => ({
+      motionTrackingSelection: state.motionTrackingSelection
+        ? { ...state.motionTrackingSelection, region }
+        : null,
+    })),
 
   focusedPanel: "timeline",
   maximizedPanel: null,
+  fullscreen: false,
   layoutPreset: loadPreset(),
   agentPanelVisible: loadBool(LS.agentPanelVisible, false),
   mediaPanelVisible: loadBool(LS.mediaPanelVisible, true),
@@ -342,13 +492,22 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
   // Selecting clips clears any gap selection (upstream: a clip mousedown sets
   // `selectedGap = nil` — the two are mutually exclusive).
   selectClips: (selectedClipIds) =>
-    set({ selectedClipIds, selectedGap: null, cropEditingActive: false }),
+    set((state) => ({
+      selectedClipIds,
+      selectedGap: null,
+      cropEditingActive: false,
+      motionTrackingSelection:
+        state.motionTrackingSelection && selectedClipIds.has(state.motionTrackingSelection.clipId)
+          ? state.motionTrackingSelection
+          : null,
+    })),
   clearSelection: () =>
     set({
       selectedClipIds: new Set(),
       selectedGap: null,
       isMarqueeSelecting: false,
       cropEditingActive: false,
+      motionTrackingSelection: null,
     }),
   selectMediaAssets: (selectedMediaAssetIds) => set({ selectedMediaAssetIds }),
   clearMediaSelection: () => set({ selectedMediaAssetIds: new Set() }),
@@ -373,8 +532,12 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
   selectGap: (selectedGap) =>
     set(selectedGap ? { selectedGap, selectedClipIds: new Set() } : { selectedGap: null }),
 
-  setZoomScale: (zoomScale) =>
-    set({ zoomScale: Math.max(get().minZoomScale, Math.min(ZOOM.max, zoomScale)) }),
+  setZoomScale: (zoomScale) => {
+    const requested = Number.isFinite(zoomScale) ? zoomScale : ZOOM.default;
+    const bounded = Math.max(get().minZoomScale, Math.min(ZOOM.max, requested));
+    persist(LS.zoomScale, String(bounded));
+    set({ zoomScale: bounded });
+  },
   setMinZoomScale: (minZoomScale) => set({ minZoomScale }),
   setScroll: (scrollLeft, scrollTop) => set({ scrollLeft, scrollTop }),
   setVisibleWidth: (timelineVisibleWidth) => set({ timelineVisibleWidth }),
@@ -398,6 +561,41 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
     else set({ focusedPanel: panel });
   },
   setMaximizedPanel: (maximizedPanel) => set({ maximizedPanel }),
+  toggleMaximizedFocusedPanel: () =>
+    set((state) => {
+      if (!state.focusedPanel) return {};
+      return {
+        maximizedPanel: state.maximizedPanel ? null : state.focusedPanel,
+      };
+    }),
+  syncFullscreen: async () => {
+    if (isTauri) {
+      const { getCurrentWindow } = await import("@tauri-apps/api/window");
+      set({ fullscreen: await getCurrentWindow().isFullscreen() });
+      return;
+    }
+    set({ fullscreen: Boolean(document.fullscreenElement) });
+  },
+  toggleFullscreen: async () => {
+    try {
+      if (isTauri) {
+        const { getCurrentWindow } = await import("@tauri-apps/api/window");
+        const window = getCurrentWindow();
+        const fullscreen = !(await window.isFullscreen());
+        await window.setFullscreen(fullscreen);
+        set({ fullscreen });
+        return;
+      }
+      if (document.fullscreenElement) {
+        await document.exitFullscreen?.();
+      } else {
+        await document.documentElement.requestFullscreen?.();
+      }
+      set({ fullscreen: Boolean(document.fullscreenElement) });
+    } catch {
+      get().pushToast(t("view.fullscreenFailed"));
+    }
+  },
   setLayoutPreset: (layoutPreset) => {
     persist(LS.layoutPreset, layoutPreset);
     set({ layoutPreset });
@@ -406,19 +604,43 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
     set((s) => {
       const agentPanelVisible = !s.agentPanelVisible;
       persist(LS.agentPanelVisible, String(agentPanelVisible));
-      return { agentPanelVisible };
+      return {
+        agentPanelVisible,
+        ...(agentPanelVisible
+          ? {}
+          : {
+              focusedPanel: s.focusedPanel === "agent" ? "timeline" : s.focusedPanel,
+              maximizedPanel: s.maximizedPanel === "agent" ? null : s.maximizedPanel,
+            }),
+      };
     }),
   toggleMediaPanel: () =>
     set((s) => {
       const mediaPanelVisible = !s.mediaPanelVisible;
       persist(LS.mediaPanelVisible, String(mediaPanelVisible));
-      return { mediaPanelVisible };
+      return {
+        mediaPanelVisible,
+        ...(mediaPanelVisible
+          ? {}
+          : {
+              focusedPanel: s.focusedPanel === "media" ? "timeline" : s.focusedPanel,
+              maximizedPanel: s.maximizedPanel === "media" ? null : s.maximizedPanel,
+            }),
+      };
     }),
   toggleInspectorPanel: () =>
     set((s) => {
       const inspectorPanelVisible = !s.inspectorPanelVisible;
       persist(LS.inspectorPanelVisible, String(inspectorPanelVisible));
-      return { inspectorPanelVisible };
+      return {
+        inspectorPanelVisible,
+        ...(inspectorPanelVisible
+          ? {}
+          : {
+              focusedPanel: s.focusedPanel === "inspector" ? "timeline" : s.focusedPanel,
+              maximizedPanel: s.maximizedPanel === "inspector" ? null : s.maximizedPanel,
+            }),
+      };
     }),
   toggleKeyframesPanel: () =>
     set((s) => {
@@ -432,8 +654,14 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
   // Leaving the Video tab ends crop editing (InspectorView.swift:66-68:
   // `if newTab != .video { editor.cropEditingActive = false }`).
   setInspectorTab: (inspectorTab) =>
-    set({ inspectorTab, cropEditingActive: inspectorTab === "video" ? get().cropEditingActive : false }),
-  resetProjectRuntimeState: () =>
+    set({
+      inspectorTab,
+      cropEditingActive: inspectorTab === "video" ? get().cropEditingActive : false,
+      motionTrackingSelection:
+        inspectorTab === "video" ? get().motionTrackingSelection : null,
+    }),
+  resetProjectRuntimeState: () => {
+    get().projectSettingsPromptResolver?.(false);
     set({
       currentFrame: 0,
       activeFrame: 0,
@@ -454,15 +682,21 @@ export const useEditorUiStore = create<UiState>((set, get) => ({
       canvasZoom: 1,
       canvasOffset: { width: 0, height: 0 },
       previewMediaId: null,
+      motionTrackingSelection: null,
       focusedPanel: "timeline",
       maximizedPanel: null,
       cropEditingActive: false,
       cropAspectLock: "free",
       mediaPanelCurrentFolderId: null,
       pendingSwapClipId: null,
-    }),
+      projectSettingsPrompt: null,
+      projectSettingsPromptResolver: null,
+    });
+  },
 
   toast: null,
   pushToast: (message) => set({ toast: { message, id: Date.now() } }),
   clearToast: () => set({ toast: null }),
 }));
+
+export const useEditorUiStore = createEditorUiStore();
diff --git a/web/src/styles/global.css b/web/src/styles/global.css
index 9648e603..a1086395 100644
--- a/web/src/styles/global.css
+++ b/web/src/styles/global.css
@@ -36,15 +36,18 @@ body {
   border-radius: var(--radius-sm);
   transition: background-color var(--anim-hover) var(--ease-out);
 }
-.hover-area:hover {
+.hover-area:not(:disabled):hover {
   background-color: rgba(255, 255, 255, var(--op-faint));
 }
 .hover-area.is-active {
   background-color: rgba(255, 255, 255, var(--op-soft));
 }
-.hover-area.is-active:hover {
+.hover-area.is-active:not(:disabled):hover {
   background-color: rgba(255, 255, 255, var(--op-muted));
 }
+.hover-area:disabled {
+  background-color: transparent;
+}
 
 .home-project-card:hover {
   background-color: var(--home-hover) !important;
@@ -60,6 +63,61 @@ button {
   cursor: default;
 }
 
+/* Every native or explicitly focusable control gets one predictable keyboard
+ * affordance. Component-specific focus styles can layer on top of this base. */
+:where(button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])):focus-visible {
+  outline: var(--bw-medium) solid var(--accent-primary);
+  outline-offset: 2px;
+}
+
+.editor-panel-shell {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  padding: calc(var(--panel-gap) / 2);
+  background: var(--bg-base);
+}
+
+.editor-panel-card {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  height: 100%;
+  min-width: 0;
+  min-height: 0;
+  overflow: hidden;
+  border-radius: var(--radius-sm);
+  background: var(--bg-surface);
+}
+
+.editor-panel-focus-ring {
+  position: absolute;
+  inset: calc(var(--panel-gap) / 2);
+  pointer-events: none;
+  border: var(--bw-medium) solid var(--accent-primary);
+  border-radius: var(--radius-sm);
+  transition: opacity var(--anim-transition) var(--ease-out);
+}
+
+.split-pane-separator {
+  outline: none;
+  transition:
+    background-color var(--anim-hover) var(--ease-out),
+    box-shadow var(--anim-hover) var(--ease-out);
+}
+
+.split-pane-separator:hover,
+.split-pane-separator:focus-visible {
+  background: rgba(245, 239, 228, 0.16);
+}
+
+.split-pane-separator:focus-visible {
+  box-shadow: 0 0 0 var(--bw-medium) var(--accent-primary);
+}
+
 .timeline-clip-access-button {
   border: 2px solid transparent;
   border-radius: var(--radius-sm);
@@ -77,6 +135,28 @@ button {
     0 0 0 4px rgba(72, 170, 255, 0.22);
 }
 
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    scroll-behavior: auto !important;
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    transition-duration: 0.01ms !important;
+  }
+}
+
+@media (forced-colors: active) {
+  :where(button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])):focus-visible {
+    outline-color: Highlight;
+  }
+
+  .editor-panel-focus-ring,
+  .timeline-clip-access-button:focus-visible {
+    border-color: Highlight;
+  }
+}
+
 input,
 textarea {
   font-family: inherit;
diff --git a/web/src/styles/tokenUsage.test.ts b/web/src/styles/tokenUsage.test.ts
new file mode 100644
index 00000000..0632c7aa
--- /dev/null
+++ b/web/src/styles/tokenUsage.test.ts
@@ -0,0 +1,59 @@
+import { readFileSync, readdirSync } from "node:fs";
+import { extname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+
+const srcRoot = new URL("..", import.meta.url);
+const componentsRoot = new URL("../components", import.meta.url);
+const componentsPath = fileURLToPath(componentsRoot);
+const tokens = readFileSync(new URL("./tokens.css", import.meta.url), "utf8");
+
+function source(path: string): string {
+  return readFileSync(new URL(path, srcRoot), "utf8");
+}
+
+function productionFiles(directory: string): string[] {
+  return readdirSync(directory, { withFileTypes: true }).flatMap((entry) => {
+    const path = join(directory, entry.name);
+    if (entry.isDirectory()) return productionFiles(path);
+    if (![".ts", ".tsx", ".css"].includes(extname(path)) || /\.(test|spec)\./.test(path)) return [];
+    return [path];
+  });
+}
+
+describe("design-token usage", () => {
+  it("representative_panel_spacing_type_radius_and_color_matrix", () => {
+    const matrix: Array<[string, string, string[]]> = [
+      ["shell", source("components/ui/PanelShell.tsx") + source("styles/global.css"), ["--bg-base", "--bg-surface", "--panel-gap", "--radius-sm", "--accent-primary"]],
+      ["toolbar", source("components/toolbar/Toolbar.tsx"), ["--toolbar-height", "--bg-surface", "--space-md", "--border-primary", "--fw-semibold"]],
+      ["media", source("components/media/MediaPanel.tsx"), ["--bg-placeholder", "--space-lg", "--fs-sm", "--radius-md", "--text-secondary"]],
+      ["inspector", source("components/inspector/Inspector.tsx"), ["--bg-raised", "--space-xl", "--fs-xxs", "--radius-sm", "--text-tertiary"]],
+      ["preview", source("components/preview/Preview.tsx"), ["--bg-prominent", "--space-md", "--fs-sm-md", "--radius-md", "--accent-timecode"]],
+      ["timeline", source("components/timeline/TimelineContainer.tsx") + source("components/timeline/clipRenderer.ts"), ["LAYOUT", "ACCENT", "TEXT", "BORDER", "CLIP"]],
+    ];
+    for (const [panel, panelSource, expected] of matrix) {
+      for (const token of expected) expect(panelSource, `${panel}: ${token}`).toContain(token);
+    }
+
+    const captions = source("components/media/CaptionsTab.tsx");
+    for (const token of [
+      "LAYOUT.captionDefaultFontSize", "LAYOUT.captionMinFontSize",
+      "LAYOUT.captionMaxFontSize", "LAYOUT.captionDefaultCenterY",
+      "LAYOUT.captionCenterSnapThreshold",
+    ]) expect(captions, `captions: ${token}`).toContain(token);
+    const keyframeUi = source("components/inspector/KeyframesLaneRow.tsx") + source("components/inspector/KeyframesRuler.tsx");
+    for (const token of ["LAYOUT.keyframeRowHeight", "LAYOUT.keyframeRulerHeight", "LAYOUT.keyframeDiamondSize"]) {
+      expect(keyframeUi, `keyframes: ${token}`).toContain(token);
+    }
+
+    const defined = new Set([...tokens.matchAll(/--([a-z0-9-]+)\s*:/g)].map((match) => match[1]));
+    const undefinedReferences = productionFiles(componentsPath).flatMap((path) => {
+      const contents = readFileSync(path, "utf8");
+      return [...contents.matchAll(/var\(--([a-z0-9-]+)/g)]
+        .map((match) => match[1])
+        .filter((name) => !defined.has(name))
+        .map((name) => `${path.replace(componentsPath, "components/")}: --${name}`);
+    });
+    expect(undefinedReferences).toEqual([]);
+  });
+});
diff --git a/web/src/styles/tokens.css b/web/src/styles/tokens.css
index a065a4fb..5045219f 100644
--- a/web/src/styles/tokens.css
+++ b/web/src/styles/tokens.css
@@ -39,6 +39,7 @@
   --accent-primary: rgb(245, 239, 228);
   --accent-spotlight: rgb(255, 69, 69);
   --status-error: rgb(229, 79, 79);
+  --status-success: rgb(88, 168, 34);
   /* SwiftUI .yellow (matches ACCENT.systemYellow in theme.ts / the main
      timeline's SnapIndicator dashed snap-guide line) */
   --status-warning: rgb(255, 204, 0);
@@ -153,6 +154,35 @@
   --panel-gap: 5px;
   --tab-rail-width: 38px;
   --context-row-height: 22px;
+  --project-card-width: 150px;
+  --project-card-height: 120px;
+  --caption-preview-max-height: 150px;
+  --tool-image-preview-max-height: 50px;
+  --caption-default-font-size: 48px;
+  --caption-min-font-size: 12px;
+  --caption-max-font-size: 300px;
+  --caption-center-snap-threshold: 0.02;
+  --caption-default-center-y: 0.9;
+  --generation-reference-tile-width: 80px;
+  --generation-reference-tile-height: 56px;
+  --keyframe-row-height: 22px;
+  --keyframe-ruler-height: 18px;
+  --keyframe-strip-height: 14px;
+  --keyframe-header-height: 32px;
+  --keyframe-diamond-size: 8px;
+
+  /* Compatibility aliases used by older panels. They resolve to the canonical
+     upstream token instead of defining a second literal value. */
+  --accent-danger: var(--status-error);
+  --danger: var(--status-error);
+  --destructive: var(--status-error);
+  --bg-secondary: var(--bg-raised);
+  --bg-hover: rgba(255, 255, 255, var(--op-faint));
+  --bg-selected: rgba(255, 255, 255, var(--op-soft));
+  --text-disabled: var(--text-muted);
+  --font-sans: var(--font-ui);
+  --duration-fast: var(--anim-hover);
+  --ease-out-expo: var(--ease-out);
 
   /* §5.2 Timeline geometry constants */
   --ruler-height: 24px;
diff --git a/web/src/styles/tokens.test.ts b/web/src/styles/tokens.test.ts
new file mode 100644
index 00000000..eeb9551b
--- /dev/null
+++ b/web/src/styles/tokens.test.ts
@@ -0,0 +1,18 @@
+import { readFileSync } from "node:fs";
+import { expect, it } from "vitest";
+
+const cssSource = readFileSync(new URL("./tokens.css", import.meta.url), "utf8");
+
+function cssColorToken(name: string): string | undefined {
+  const value = cssSource.match(new RegExp(`--${name}\\s*:\\s*([^;]+);`))?.[1];
+  return value?.replace(/\s+/g, "").trim();
+}
+
+it("bg_placeholder_equals_raised_rgb_30", () => {
+  const raised = cssColorToken("bg-raised");
+  const placeholder = cssColorToken("bg-placeholder");
+
+  expect(raised).toBe("rgb(30,30,30)");
+  expect(placeholder).toBe("rgb(30,30,30)");
+  expect(placeholder).toBe(raised);
+});