refactor: remove redundant feature gates, promote index into full

.github/workflows/ci.yml

@@ -156,7 +156,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - features: "desktop,ide,server,chat,pdf,scheduler,registry,testing,deep-link"
+          - features: "desktop,ide,server,chat,pdf,scheduler,testing"
             label: desktop-ide-server-chat-pdf-scheduler
           - features: bench
             label: bench
@@ -182,7 +182,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - features: "desktop,ide,server,chat,pdf,scheduler,registry,deep-link"
+          - features: "desktop,ide,server,chat,pdf,scheduler"
             label: desktop-ide-server-chat-pdf-scheduler
           - features: bench
             label: bench
@@ -226,7 +226,7 @@ jobs:
       - name: Build and archive tests
         env:
           RUSTFLAGS: "-Z threads=4"
-        run: cargo nextest archive --config-file .github/nextest.toml --cargo-profile ci --workspace --features "desktop,ide,server,chat,pdf,scheduler,registry,deep-link" --lib --bins --tests --archive-file nextest-archive.tar.zst
+        run: cargo nextest archive --config-file .github/nextest.toml --cargo-profile ci --workspace --features "desktop,ide,server,chat,pdf,scheduler" --lib --bins --tests --archive-file nextest-archive.tar.zst
       - name: Upload test archive
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
         with:
@@ -759,7 +759,7 @@ jobs:
         # `#![recursion_limit]` fix) because it skips codegen/LTO layout finalization. Only a
         # real `cargo build --release` with this workspace's `[profile.release]` (lto = true,
         # codegen-units = 1) exercises the same query depth CI is meant to gate on.
-        run: cargo build --release --workspace --all-targets --features "desktop,ide,server,chat,pdf,scheduler,registry,testing,deep-link"
+        run: cargo build --release --workspace --all-targets --features "desktop,ide,server,chat,pdf,scheduler,testing"
 
   release-build-full:
     name: Release Build Check (full)
@@ -859,9 +859,9 @@ jobs:
         with:
           shared-key: "ci"
       - name: Build docs (all features except candle)
-        run: cargo doc --no-deps --workspace --features "desktop,ide,server,chat,pdf,scheduler,registry,deep-link"
+        run: cargo doc --no-deps --workspace --features "desktop,ide,server,chat,pdf,scheduler"
       - name: Doc-tests
-        run: cargo test --doc --workspace --features "desktop,ide,server,chat,pdf,scheduler,registry,deep-link"
+        run: cargo test --doc --workspace --features "desktop,ide,server,chat,pdf,scheduler"
 
   validate-specs:
     name: Validate Specs

CHANGELOG.md

@@ -32,6 +32,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   build hit the 30-minute limit and was cancelled — a direct consequence of the sccache removal
   above, since a cold `--features full` build (including the heavier candle/ML dependencies) now
   compiles from scratch on every release instead of reusing a warm cache.
+- **BREAKING**: `full` no longer implies `testing`. Anyone relying on `--features full` for mock
+  LLM providers must now add `testing` explicitly (`--features full,testing`) (#6747).
+- `index` (AST-based code indexing) joins the `desktop` bundle, and therefore `full` — the first
+  time `full` compiles `zeph-index` in (#6747).
+
+### Removed
+
+- Workspace feature-flag audit: `deep-link`, `cocoon`, `registry`, `zeph-orchestration/llm-planning`,
+  `zeph-scheduler/daemon`, and six stabilized `zeph-acp/unstable-*` flags (`unstable-boolean-config`,
+  `unstable-session-delete`, `unstable-session-resume`, `unstable-logout`, `unstable-session-add-dirs`,
+  `unstable-message-id`) are removed — all gated code is now always-on. `zeph-core/sysinfo` merged
+  into `zeph-core/profiling`. Three genuinely-empty `default = []` declarations (`zeph-config`,
+  `zeph-vault`, `zeph-worktree`) removed. `zeph-skills/miner` no longer synthesizes five implicit
+  `dep:`-less features (`anyhow`, `clap`, `dirs`, `toml`, `tracing-subscriber`) — replaced with
+  explicit `dep:` prefixes. `cargo metadata` feature count: 184 → 157 (#6747).
 
 ### Security
 

Cargo.toml

@@ -92,7 +92,7 @@ rand = "0.10.2"
 rand_distr = "0.6"
 ratatui = "0.30.2"
 regex = "1.13.1"
-reqwest = { version = "0.13.4", default-features = false }
+reqwest = { version = "0.13.4", default-features = false, features = ["query"] }
 ripemd = "0.2"
 rmcp = "3.1.2"
 rubato = "5.0.0"
@@ -243,20 +243,19 @@ readme = "README.md"
 default = ["scheduler", "sqlite"]
 
 # === Use-case bundles ===
-desktop = ["tui", "deep-link", "session"]
+desktop = ["tui", "session", "index"]
 ide     = ["acp", "acp-http"]
 server  = ["gateway", "a2a", "otel", "prometheus", "session"]
 chat    = ["discord", "slack"]
 ml      = ["candle", "pdf"]
-full    = ["desktop", "ide", "server", "chat", "pdf", "scheduler", "classifiers", "profiling", "sandbox", "gonka", "cocoon", "testing", "registry"]
+full    = ["desktop", "ide", "server", "chat", "pdf", "scheduler", "classifiers", "profiling", "sandbox", "gonka"]
 testing = ["zeph-llm/testing"]
 sandbox    = ["zeph-tools/sandbox"]
 bench      = ["dep:zeph-bench"]
 
 # === Individual feature flags ===
-deep-link = ["zeph-common/deep-link", "zeph-config/deep-link"]
 a2a = ["dep:zeph-a2a", "zeph-a2a?/server", "zeph-a2a?/ibct", "zeph-a2a?/card-signing", "zeph-config/card-signing"]
-acp = ["dep:zeph-acp", "zeph-acp/unstable-session-delete", "zeph-acp/unstable-session-fork", "zeph-acp/unstable-session-resume", "zeph-acp/unstable-session-usage", "zeph-acp/unstable-elicitation", "zeph-acp/unstable-llm-providers", "zeph-acp/unstable-logout", "zeph-acp/unstable-auth-methods", "zeph-acp/unstable-message-id", "zeph-acp/unstable-session-add-dirs"]
+acp = ["dep:zeph-acp", "zeph-acp/unstable-session-fork", "zeph-acp/unstable-session-usage", "zeph-acp/unstable-elicitation", "zeph-acp/unstable-llm-providers", "zeph-acp/unstable-auth-methods"]
 acp-http = ["acp", "dep:axum", "zeph-acp/acp-http"]
 candle = ["zeph-llm/candle", "zeph-core/candle"]
 classifiers = ["candle", "zeph-llm/classifiers", "zeph-sanitizer/classifiers", "zeph-core/classifiers"]
@@ -267,10 +266,7 @@ discord = ["zeph-channels/discord"]
 slack = ["zeph-channels/slack"]
 gateway = ["dep:zeph-gateway"]
 prometheus = ["gateway", "dep:prometheus-client", "zeph-gateway/prometheus"]
-scheduler = ["dep:zeph-scheduler", "dep:blake3", "dep:cron", "dep:schemars", "zeph-core/scheduler", "zeph-scheduler/daemon", "zeph-memory/scheduler"]
-# Skill/plugin marketplace discovery (spec-045, #5869): gates zeph-plugins' `marketplace`
-# module (skills.sh registry client). CLI args and RegistryConfig parsing always compile.
-registry = ["zeph-plugins/registry"]
+scheduler = ["dep:zeph-scheduler", "dep:blake3", "dep:cron", "dep:schemars", "zeph-core/scheduler", "zeph-memory/scheduler"]
 # Session persistence, event-log replay, and `zeph serve` (spec-068, #5343). Independent of `acp`:
 # `acp` gates ACP protocol transports, `session` gates the persistence CLI verbs and `zeph serve`.
 # The `zeph-session` crate/agent-loop dual-write is always compiled and config-gated
@@ -282,7 +278,6 @@ profiling = [
     "dep:tracing-chrome",
     "dep:sysinfo",
     "zeph-core/profiling",
-    "zeph-core/sysinfo",
     "zeph-llm/profiling",
     "zeph-memory/profiling",
     "zeph-tools/profiling",
@@ -306,7 +301,6 @@ profiling-pyroscope = ["profiling", "otel", "dep:pprof"]
 #   cargo build --no-default-features --features full,sqlite
 # Or simply `cargo build --features full` to rely on the default sqlite backend.
 gonka = ["zeph-llm/gonka", "zeph-core/gonka"]
-cocoon = ["zeph-llm/cocoon", "zeph-core/cocoon", "zeph-tui?/cocoon"]
 index = ["zeph-core/index"]
 sqlite = [
     "zeph-db/sqlite",
@@ -443,7 +437,7 @@ wiremock.workspace = true
 zeph-core.workspace = true
 zeph-llm = { workspace = true, features = ["testing"] }
 zeph-memory.workspace = true
-zeph-plugins = { workspace = true, features = ["registry", "mock"] }
+zeph-plugins = { workspace = true, features = ["mock"] }
 zeph-skills.workspace = true
 # Features are declared by the crates that use them, see workspace dependencies
 

book/src/advanced/acp.md

@@ -872,7 +872,6 @@ Each feature adds a standard ACP protocol method or notification to the agent's
 |--------------|---------------------------|-------------|
 | `unstable-session-list` | `list_sessions` | Enumerate in-memory sessions. Accepts an optional `cwd` filter; returns session ID, working directory, and last-updated timestamp for each matching session. |
 | `unstable-session-fork` | `fork_session` | Clone an existing session's persisted event history into a new session and immediately spawn a fresh agent loop from that checkpoint. The source session continues unaffected. |
-| `unstable-session-resume` | `resume_session` | Reattach to a session that exists in SQLite but is not currently active in memory. Spawns an agent loop without replaying historical events. Useful for continuing a session after a Zeph restart. |
 | `unstable-session-usage` | `UsageUpdate` in `PromptResponse` | Include token consumption data (input tokens, output tokens, cache read/write tokens) in each prompt response. IDEs use this to display per-turn and cumulative cost estimates. |
 | `unstable-session-model` | `set_session_model` | Allow the IDE to switch the active LLM model mid-session via a model picker UI. Zeph emits a `SetSessionModel` notification so the IDE can reflect the change immediately. |
 | `unstable-session-info-update` | `SessionInfoUpdate` | Zeph automatically generates a short title for the session after the first exchange and emits a `SessionInfoUpdate` notification. IDEs display this as the conversation title in their session list. |
@@ -881,14 +880,15 @@ The composite flag `acp-unstable` (root crate) enables all six at once.
 
 > **Note:** These features are gated on the `zeph-acp` crate. Each flag also enables the corresponding feature in the `agent-client-protocol` dependency. Stability and wire format are not guaranteed across minor versions until promoted to stable.
 
+> **Note:** `unstable-session-resume` was removed entirely in the 2026-08 feature-flag audit rather than kept as a no-op tombstone — `session/resume` is stabilized upstream and now compiles unconditionally.
+
 ### Enabling the features
 
 Enable individual flags:
 
 ```bash
 cargo build --features unstable-session-list
 cargo build --features unstable-session-fork
-cargo build --features unstable-session-resume
 cargo build --features unstable-session-usage
 cargo build --features unstable-session-model
 cargo build --features unstable-session-info-update
@@ -907,7 +907,6 @@ When embedding `zeph-acp` as a library dependency:
 zeph-acp = { version = "...", features = [
   "unstable-session-list",
   "unstable-session-fork",
-  "unstable-session-resume",
   "unstable-session-usage",
   "unstable-session-model",
   "unstable-session-info-update",
@@ -963,7 +962,7 @@ The source session remains active and unchanged. Both sessions are independent a
 
 ### resume_session
 
-When `unstable-session-resume` is active, the agent advertises `resume` in `session_capabilities`. The IDE can call `resume_session` to reattach to a previously persisted session.
+The agent advertises `resume` in `session_capabilities`. The IDE can call `resume_session` to reattach to a previously persisted session.
 
 The resume operation:
 
@@ -1438,7 +1437,7 @@ Restrict which filesystem paths an ACP session is allowed to access:
 additional_directories = ["/workspace", "/tmp"]
 ```
 
-Requests to access paths outside this list are rejected at session start. Feature-gated by `unstable-session-add-dirs`.
+Requests to access paths outside this list are rejected at session start.
 
 ### Auth Methods Configuration
 
@@ -1460,8 +1459,6 @@ When enabled, the client's `message_id` from the prompt is echoed back on all st
 message_ids_enabled = true
 ```
 
-Feature-gated by `unstable-message-id`.
-
 ### CLI Overrides
 
 All three ACP configuration options can be overridden at runtime:

book/src/reference/configuration.md

@@ -730,7 +730,7 @@ discovery_enabled = true           # Expose GET /.well-known/acp.json manifest e
 available_models = []              # Models advertised to IDE for switching: ["claude:claude-sonnet-5", "ollama:llama3"] (default: [])
 additional_directories = []        # Extra workspace directories ACP clients may reference (default: [])
 auth_methods = ["agent"]           # Auth methods advertised in initialize (currently only "agent" supported) (default: ["agent"])
-message_ids_enabled = true         # Echo PromptRequest.message_id onto responses (requires unstable-message-id feature) (default: true)
+message_ids_enabled = true         # Echo PromptRequest.message_id onto responses (default: true)
 
 [acp.model_config]
 default_temperature_preset = "balanced"  # Default sampling-temperature: "precise" (0.2), "balanced" (0.7), or "creative" (1.0) (default: "balanced")