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fix(activate): target title-bar commands to their click-origin instance - #1528

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fix(activate): target title-bar commands to their click-origin instance#1528
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@easonLiangWorldedtech easonLiangWorldedtech commented Sep 4, 2026

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Part of the vps2 durable per-view state series — tracked in easonLiangWorldedtech#41 (cross-repo: this PR is standalone against upstream/main @ 0d937c0).

Issue (created at PR-open time): #1529

What

All title-bar commands (+ / Settings / History / Marketplace / popout / focus) resolve to a single surface-blind "visible" ClineProvider instance, and setPanel's mutual wipe of the sidebar/tab slots leaves stale references once a tab and the sidebar coexist. This PR makes each title-bar command target the instance its click originated from:

  • setPanel no longer wipes the other slot (each branch assigns only its own slot); the exported setPanel / getPanel signatures are kept.
  • The four sidebar title-bar handlers target the click-origin provider that registerCommands was handed.
  • Four new *InTab command ids (packages/types/src/vscode.ts) rewire the editor/title menu, reusing the existing i18n keys/icons (zero new strings); the tab handlers resolve the owning instance via the new static ClineProvider.getInstanceForView(panel) (identity match over activeInstances) instead of the surface-blind getVisibleInstance.
  • openClineInNewTab reuses the live tracked tab panel (reveal + didBecomeVisible post) instead of unconditionally creating a new provider + panel.
  • The focusInput post condition is sidebarPanel && !tabPanel.

Design decisions

  • D1 (mutual wipe): fixed by the no-wipe setPanel. The sidebar onDidDispose asymmetry (the sidebar slot is never cleared) is pre-existing and retained; with no-wipe a stale slot resolves to a disposed instance via getInstanceForView, and the InTab handlers then no-op safely.
  • D2 (no tab reuse): fixed by the panel reuse via getInstanceForView.
  • D3 (surface-blind targeting): the five title-bar commands are contributed to both view/title and editor/title in package.json (verified by the Phase-0 A6 audit); the editor/title entries are rewired to the *InTab ids.
  • D4 (focusPanel tab-first resolution): self-resolves once the no-wipe lands — focusPanel.ts is deliberately unchanged (no spec exists for it).
  • zoo-code.newTask (command-palette only) intentionally stays on the visible-provider path (focus-sidebar fallback); documented as a known limitation below.
  • Webview-originated actions are per-instance by construction (setWebviewMessageListener wires this); the single leak (focusPanelRequest) is out of scope here.

Measurements

  • a+d vs upstream/main @ 0d937c0: 484 (411+/73−) — over the 400 soft budget by 112: the mutation gate required per-post distinct-error catch pinning, an awaited InTab no-op matrix (all four commands), and real-class getInstanceForView coverage (registerCommands.spec auto-mocks ClineProvider, so the real find callback had no coverage). Under the 600 hard cap. Composition: ~372 first-cut (impl + spec) + ~112 mutation-killing tests.
  • src executable lines: 144 a+d (registerCommands.ts 99+/27−, ClineProvider.ts 10+, packages/types 8+) — inside the ~300 mutation preflight.

Gates

  • eslint --prune-suppressions: pass (suppression counts unchanged; prune-only reindent reverted)
  • check-types: pass (13 packages)
  • vitest: registerCommands.spec.ts 36 pass; ClineProvider.spec.ts 155 pass; packages/types 5 pass
  • stryker-diff ci @ 0d937c0: 72/72 killed, 0 surviving, 0 uncovered, 0 blocking (registerCommands.ts + ClineProvider.ts)
  • e2e / i18n / visual: n/a (zero new i18n strings; no webview-ui changes)

Parked / documented

  • zoo-code.newTask stays on the visible-provider path (palette-only surface; focus-sidebar fallback).
  • The A6 audit's alternate minimal-fix design (public renderContext / getSurfaceProviderOrLog / active-surface-first getVisibleInstance) was considered and not adopted.

Porting notes

None — new fix (F0) identified by the Phase-0 A6 button-targeting audit; no hunks ported from the closed draft PRs.

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src/activate/__tests__/registerCommands.spec.ts (1)

3-9: LGTM!

Also applies to: 141-145, 173-174, 205-242, 245-274, 276-310, 383-410, 412-465, 467-513, 532-565, 606-608, 620-640, 642-656, 658-678, 680-706, 708-727, 729-748, 750-761, 763-792, 794-811, 813-855, 857-874, 876-928


📝 Summary

Summary by CodeRabbit

  • New Features

    • Added dedicated title-bar actions for editor tabs: New Task, Settings, Marketplace, and History.
    • Editor-tab actions now operate on the tab they were opened from.
    • Added editor-tab actions to the command palette when a tab is active.
  • Bug Fixes

    • Reopening an existing editor tab now reuses it instead of creating a duplicate.
    • Improved focus handling when sidebar and editor-tab panels are open.
    • Prevented duplicate tabs during simultaneous tab-opening requests.
    • Improved behavior when an editor tab is unavailable or closed.

Walkthrough

The change adds editor-tab variants for title-bar commands. Command handlers target the owning sidebar or tab provider, track panel references independently, reuse live tab panels, and serialize concurrent tab creation.

Changes

Surface command routing

Layer / File(s) Summary
Command contracts and menu wiring
packages/types/src/vscode.ts, src/package.json
Adds four *InTab command IDs and contributions. Tab title menus and the command palette expose the tab-specific commands.
Provider lookup and panel lifecycle
src/core/webview/ClineProvider.ts, src/activate/registerCommands.ts, src/activate/__tests__/registerCommands.spec.ts, src/core/webview/__tests__/ClineProvider.spec.ts
Adds provider lookup by view, preserves independent sidebar and tab references, reuses live tab panels, serializes concurrent creation, handles MDM initialization failure, and protects replacement tracking during disposal.
Surface-specific command handlers and validation
src/activate/registerCommands.ts, src/activate/__tests__/registerCommands.spec.ts
Routes sidebar actions to the registered provider and tab actions to the owning tab provider. Tests cover telemetry, no-op cases, error logging, task actions, focus behavior, and tab routing.
Lifecycle test support
src/activate/__tests__/registerCommands.spec.ts, src/eslint-suppressions.json
Extends provider fixtures and validates panel reuse, editor placement, concurrent opens, disposal behavior, and lint-suppression removal.

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: ⚪ Minimal · up to 99662

Title-bar actions now target the provider associated with their sidebar or editor-tab surface, preventing actions from reaching a different visible instance. The change includes coverage for routing, panel reuse, concurrent creation, and disposal behavior, with no current merge-blocking risk identified.

Sequence Diagram(s)

sequenceDiagram
  participant VSCode as VSCode editor title
  participant Commands as registerCommands
  participant Lookup as ClineProvider
  participant Provider as Surface provider
  participant Webview as Webview surface
  VSCode->>Commands: Invoke surface-specific command
  Commands->>Lookup: Resolve provider for tracked tab panel
  Lookup-->>Commands: Return owning ClineProvider
  Commands->>Provider: Post surface action and telemetry
  Provider->>Webview: Update chat or navigation state
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🚥 Pre-merge checks | ✅ 6 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Regression Evidence ⚠️ Warning The changed setPanel behavior is not fully covered. setPanel now keeps sidebarPanel and tabPanel independent in both branches (src/activate/registerCommands.ts:61-65), and `ClineProvider.res… Add a focused setPanel/getPanel unit test for the reverse order: set a tab panel, set a sidebar panel, verify the tab remains tracked, then clear the sidebar and verify the tab remains tracked. Keep the existing test for the opposite or…
✅ Passed checks (6 passed)
Check name Status Explanation
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 5 files.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Trust And Persistence Invariants ✅ Passed No changed path matches the explicit failure conditions. The new tab handlers resolve providers by exact view identity and only send fixed, typed actions. The sidebar and tab plus handlers await `evic…
Title check ✅ Passed The title clearly and concisely describes the main change: title-bar commands now target the instance associated with the click origin.
Description check ✅ Passed The description is detailed and relevant. It identifies the related issues, explains the implementation and design decisions, documents limitations, and reports lint, type-check, test, and mutation-te…
Full details: Regression Evidence

Explanation

The changed setPanel behavior is not fully covered. setPanel now keeps sidebarPanel and tabPanel independent in both branches (src/activate/registerCommands.ts:61-65), and ClineProvider.resolveWebviewView can invoke the sidebar branch after the tab branch (src/core/webview/ClineProvider.ts:1021-1027). The only focused coexistence test sets the sidebar first, then the tab, and verifies that clearing the tab restores sidebar focus (src/activate/__tests__/registerCommands.spec.ts:398-410). No test sets the tab first, then the sidebar, or verifies that clearing the sidebar preserves the tab. A regression in the sidebar branch that restores the old mutual wipe would therefore pass the current tests.

Resolution

Add a focused setPanel/getPanel unit test for the reverse order: set a tab panel, set a sidebar panel, verify the tab remains tracked, then clear the sidebar and verify the tab remains tracked. Keep the existing test for the opposite order.

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Codecov Report

❌ Patch coverage is 98.03922% with 1 line in your changes missing coverage. Please review.

Files with missing lines Patch % Lines
src/activate/registerCommands.ts 98.00% 0 Missing and 1 partial ⚠️

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easonLiangWorldedtech marked this pull request as ready for review September 7, 2026 06:11
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Inline comments:
In `@src/activate/registerCommands.ts`:
- Around line 288-295: Serialize editor-tab creation in the command flow around
ClineProvider.getInstanceForView by storing and reusing a shared in-flight
creation promise, clearing it in finally after completion or failure. Ensure
overlapping calls create only one panel and return the same provider, and add a
concurrent Promise.all regression test asserting both outcomes and the single
panel creation.

In `@src/core/webview/__tests__/ClineProvider.spec.ts`:
- Around line 572-573: Replace the private view assignment in ClineProvider
tests with resolveWebviewView() or an explicit typed test helper, removing the
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Actionable comments posted: 2

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Inline comments:
In `@src/activate/__tests__/registerCommands.spec.ts`:
- Line 653: Strengthen the assertion around the shared provider results so both
values are explicitly compared with the constructed ClineProvider instance
exposed by the mocked constructor, rather than only comparing first and second
to each other. Preserve the identity check for both callers and avoid assertions
that could pass when both results are undefined.

In `@src/activate/registerCommands.ts`:
- Around line 322-337: Add focused tests in the registerCommands test suite
covering MdmService.getInstance throwing and falling back to undefined, an empty
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🪛 GitHub Check: mutation-diff
src/activate/registerCommands.ts

[failure] 337-337: Mutation test gap
Survived StringLiteral mutant (replacement: ""). See the job summary for the complete list and resolution guidance.


[failure] 336-336: Mutation test gap
Survived BooleanLiteral mutant (replacement: hasVisibleEditors). See the job summary for the complete list and resolution guidance.


[failure] 334-334: Mutation test gap
Survived ConditionalExpression mutant (replacement: true). See the job summary for the complete list and resolution guidance.


[failure] 330-330: Mutation test gap
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[failure] 329-329: Mutation test gap
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🔇 Additional comments (3)
src/activate/registerCommands.ts (1)

35-39: LGTM!

Also applies to: 297-301, 388-396

src/activate/__tests__/registerCommands.spec.ts (1)

139-143: LGTM!

Also applies to: 171-172, 526-527

src/core/webview/__tests__/ClineProvider.spec.ts (1)

571-572: LGTM!

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Author status note for maintainers: all required CI + e2e-mock are green on head c51846007 (e2e-mock run 34099653035 ✓; Code QA 8/8 jobs ✓). The only red check is the non-required Changed-code mutation testing (known surviving-mutant gaps at registerCommands.ts L322-337, tracked separately).

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In `@src/activate/__tests__/registerCommands.spec.ts`:
- Line 756: Update the test around the created tab panel to retain the panel
returned during creation, then assert getPanel() is the identical panel with
toBe(panel) before disposal; replace the weak toBeDefined() assertion while
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…en view-identity tests

Track the in-flight tab panel creation with a module-level promise so concurrent openClineInNewTab calls reuse one panel and provider (adds a Promise.all regression test). ClineProvider.spec sets the private view via the public resolveWebviewView() instead of a ts-ignore assignment. registerCommands.spec types evictCurrentTask/refreshWorkspace on the fixture and drops the as any attachment. eslint-suppressions: prune the registerCommands.spec.ts entry (two as any suppressions removed).
…-bar posts

- openClineInNewTab: extract the unserialized creation body into
  createTabPanelUnlocked and guard the in-flight slot clear so a settled
  creation cannot clobber a replacement already stored in the slot.
- onDidDispose: clear the tracked tab ref only when the disposing panel is
  still the tracked one, so a late disposal of a replaced panel cannot
  clobber the replacement's ref.
- MDM lookup failure: log the fallback to the output channel instead of
  swallowing it silently.
- Route the six title-bar button handlers through a shared postActions
  helper that posts each action in order and logs failures with the
  handler-specific prefix.
- package.json: add the four InTab commands to the command palette, scoped
  to the active tab panel.
- Tests: handler-level regression for openInNewTab + popoutButtonClicked
  started before the first creation resolves; fresh-creation test for a
  settled in-flight promise; stale-panel disposal regression; retained
  panel assertion for disposed tab instances; rightmost-editor column
  placement assertion; MDM fallback output assertion; %s placeholders for
  primitive it.each titles.
- Stryker directives for the two equivalent setPanel type-literal mutants
  (setPanel branches only on type === sidebar).
@github-actions github-actions Bot added coderabbit-review-active Required CI passed; CodeRabbit review is active awaiting-coderabbit Waiting for CodeRabbit to approve the latest commit and removed awaiting-author PR is waiting for the author to address requested changes labels Sep 7, 2026
Replace the weak toBeDefined() assertion in the dispose spec with an
identity check against the panel returned during creation, per the
CodeRabbit actionable comment on this PR (review run 7c4cfeb3-6dd9-4615-
9a58-70cfc705eca2). The tracked tab is now pinned with toBe(panel)
before the dispose assertions, so a wrong or duplicated tracked panel
fails the suite instead of passing a defined-only check.

Upstream: Zoo-Code-Org#1528 (vps2 F0)
@github-actions github-actions Bot removed coderabbit-review-active Required CI passed; CodeRabbit review is active awaiting-coderabbit Waiting for CodeRabbit to approve the latest commit labels Sep 7, 2026

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Actionable comments posted: 1

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Inline comments:
In `@src/activate/__tests__/registerCommands.spec.ts`:
- Line 260: Update the test around setPanel and ClineProvider.getInstanceForView
to retain the mock tab panel object and assert that getInstanceForView receives
that exact panel instance, rather than only verifying a generic call or provider
result. Keep the existing "tab" view behavior unchanged.

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  • src/activate/__tests__/registerCommands.spec.ts
  • src/core/webview/ClineProvider.ts

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For persisted settings, verify the complete schema/storage/runtime/webview round trip, shared default semantics, and focused true plus false/unset tests.

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  • src/core/webview/ClineProvider.ts
Require regression coverage at the lowest valid harness with behavior-focused assertions, including relevant negative, error, false/unset, and boundary cases.

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  • src/activate/__tests__/registerCommands.spec.ts
Verify extension/webview contracts, cancellation and error propagation, VS Code lifecycle correctness, and behavior under retries and partial failure.

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Comment thread src/activate/__tests__/registerCommands.spec.ts Outdated
Retain the tracked tab panel in the InTab handler cases and assert that
getInstanceForView was called with that exact panel, per the CodeRabbit
actionable comment on this PR (review run 4afe1273-8739-4235-90d3-311db5f6ccb9,
inline comment 3952466254 on the tabHandlerCases spec). A handler resolving
any other view now fails instead of passing on the stubbed provider result
alone; the same identity pin is applied to plusButtonClickedInTab.

Upstream: Zoo-Code-Org#1528 (vps2 F0)
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