refactor(code-index): introduce feature scopes and centralize status subscriptions

[WebMad]

Summary

• Introduce workspace scopes behind the code-index manager registry and move state-manager construction into the workspace scope.
• Add an extension-lifetime code-index scope that owns the status manager.
• Move active-workspace resolution, progress subscriptions, status broadcasting, and subscription cleanup out of the webview provider into the status manager.
• Resolve workspace paths explicitly before requesting a manager and log delivery/cleanup failures independently.
• Add focused coverage for scope ownership, workspace switching, stale progress events, activation, and error handling.

Includes the prerequisite workspace-scope refactoring commit and the subsequent status/state ownership refactoring.

Validation

• 229 tests passed across 7 focused suites (registry, workspace scope, feature scope, status manager, indexing manager, activation, and webview provider).
• Backend TypeScript check passed.
• Repository lint and type-check hooks passed.
• No changesets or changelog updates; unrelated local files excluded.

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🔇 Additional comments (2)

src/services/code-index/code-index-status-manager.ts (1)

56-56: LGTM!

src/__tests__/extension.spec.ts (1)

306-313: LGTM!

Also applies to: 337-344

---

📝 Summary

Summary by CodeRabbit

• New Features
  • Code-index status now follows the active editor’s workspace and is shared across open views.
  • Status updates are limited to views associated with the matching workspace; views without an explicitly associated workspace can also receive updates.
• Bug Fixes
  • Code-index initialization failures are logged without interrupting extension activation.
  • Cleanup continues if disposing one workspace’s code index fails, helping other workspaces finish cleanup.
  • Status delivery failures are logged without preventing updates to other matching views.

Walkthrough

Workspace scopes now own code-index and state managers. An extension-scoped status manager tracks the active workspace and publishes indexing status to matching providers. ClineProvider no longer manages code-index status subscriptions.

Changes

Code Index Lifecycle

Layer / File(s)	Summary
Workspace manager ownership src/services/code-index/code-index-workspace-scope.ts, src/services/code-index/manager.ts, src/services/code-index/__tests__/code-index-workspace-scope.spec.ts, src/core/tools/__tests__/CodebaseSearchTool.workspace.spec.ts	CodeIndexWorkspaceScope constructs and disposes the workspace's code-index and state managers. CodeIndexManager receives its state manager through its constructor. Tests cover scope lifecycle and constructor injection.
Registry scope management src/services/code-index/code-index-manager-registry.ts, src/services/code-index/__tests__/code-index-manager-registry.spec.ts	The registry stores workspace scopes, returns their code-index managers, and catches disposal failures per scope. Tests cover constructor arguments, disposal failures, and repeated cleanup.
Extension status publication src/services/code-index/code-index-status-manager.ts, src/services/code-index/code-index-scope.ts, src/extension.ts, src/core/webview/ClineProvider.ts, src/services/code-index/__tests__/code-index-status-manager.spec.ts, src/services/code-index/__tests__/code-index-scope.spec.ts, src/__tests__/extension.spec.ts, src/core/webview/__tests__/ClineProvider.spec.ts	The extension initializes and registers CodeIndexScope. Its status manager tracks the active workspace and publishes status to matching provider instances. ClineProvider exposes its explicitly associated workspace and no longer manages code-index status subscriptions. Tests cover status updates, lifecycle, workspace filtering, and initialization or delivery failures.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Refactor

Sequence Diagram(s)

sequenceDiagram
  participant Extension
  participant CodeIndexScope
  participant CodeIndexStatusManager
  participant CodeIndexManagerRegistry
  participant CodeIndexManager
  participant ClineProvider
  Extension->>CodeIndexScope: initialize and register for disposal
  CodeIndexScope->>CodeIndexStatusManager: initialize with manager resolver
  CodeIndexStatusManager->>CodeIndexManagerRegistry: request manager for active workspace
  CodeIndexManagerRegistry->>CodeIndexManager: create or return workspace manager
  CodeIndexManager-->>CodeIndexStatusManager: provide current status and progress updates
  CodeIndexStatusManager->>ClineProvider: publish status to matching workspace providers

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Merge Risk: 🔵 Low · up to 98041

If code-index status startup fails, its editor listener can remain active for the session despite the logged error. This is a bounded startup-failure risk; clean up the listener on failed initialization.

🚥 Pre-merge checks | ✅ 5 | ❌ 3

❌ Failed checks (3 warnings)

Check name	Status	Explanation	Resolution
Regression Evidence	⚠️ Warning	The new provider-status broadcasting behavior lacks coverage at its lowest valid test layer. CodeIndexStatusManager.publishStatus() and publishStatusToProvider() now enumerate providers, filter wo…	Add focused tests to code-index-status-manager.spec.ts with mocked provider instances. Trigger publication through init() and a manager progress event, then verify matching, mismatched, undefined, and empty workspacePath handling, del…
Lifecycle Resource Cleanup	⚠️ Warning	CodeIndexScope.init() creates a CodeIndexStatusManager, calls manager.init(), and stores it only after initialization succeeds. CodeIndexStatusManager.init() registers the active-editor listen…	Make CodeIndexScope.init() retain ownership before initialization or clean up on failure. For example, assign this.statusManager = manager before manager.init(), then reset state and call manager.dispose() in a catch block before re…
Description check	⚠️ Warning	The description clearly summarizes the implementation and validation, but it omits the required linked GitHub Issue, checklist, and several template sections. The validation details also appear under …	Add an approved issue reference in the "Related GitHub Issue" section, provide a detailed "Test Procedure" section, complete the pre-submission checklist, and address the documentation, visual snapshot, video, additional notes, and contact …

✅ Passed checks (5 passed)

Check name	Status	Explanation
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.
Security Boundaries	✅ Passed	No explicit security-boundary failure is introduced. The changed status path publishes indexing metadata to local ClineProvider webviews; it does not send source contents, credentials, or PII to an ex…
Persistence Integrity	✅ Passed	No changed persistence path meets the failure condition. The PR changes in-memory ownership and status delivery: CodeIndexWorkspaceScope injects a new CodeIndexStateManager, and `CodeIndexStatusMa…
Title check	✅ Passed	The title clearly identifies the main changes: introducing code-index feature scopes and centralizing status subscriptions.

Full details: Regression Evidence

Explanation

The new provider-status broadcasting behavior lacks coverage at its lowest valid test layer. CodeIndexStatusManager.publishStatus() and publishStatusToProvider() now enumerate providers, filter workspace paths, post indexingStatusUpdate, and isolate delivery failures. The dedicated code-index-status-manager.spec.ts mocks ClineProvider.getAllInstances() to always return [] and replaces the private publishStatus() method with a spy in its lifecycle tests. The routing tests instead call the private scope["statusManager"]["publishStatus"]() from extension.spec.ts, which bypasses the real status-manager event path and uses a higher-level test to exercise private state.

Resolution

Add focused tests to code-index-status-manager.spec.ts with mocked provider instances. Trigger publication through init() and a manager progress event, then verify matching, mismatched, undefined, and empty workspacePath handling, delivery to every eligible provider, and independent logging when one provider rejects. Avoid relying on direct private-method calls from extension.spec.ts; retain extension tests only for scope registration and activation-error handling.

Full details: Lifecycle Resource Cleanup

Explanation

CodeIndexScope.init() creates a CodeIndexStatusManager, calls manager.init(), and stores it only after initialization succeeds. CodeIndexStatusManager.init() registers the active-editor listener before updateSubscription(), which can throw from workspace-manager resolution or status setup. If that occurs, extension.activate() catches the error, but the CodeIndexScope remains in context.subscriptions without a stored status manager. Later disposal cannot reach the listener, so it remains registered. The changed status-manager test also confirms that initialization failures propagate after subscriptions are created.

Resolution

Make CodeIndexScope.init() retain ownership before initialization or clean up on failure. For example, assign this.statusManager = manager before manager.init(), then reset state and call manager.dispose() in a catch block before rethrowing. Ensure the failed scope's dispose() can always dispose any listener created during partial initialization.

Full details: Description check

Explanation

The description clearly summarizes the implementation and validation, but it omits the required linked GitHub Issue, checklist, and several template sections. The validation details also appear under "Validation" instead of the required "Test Procedure" section.

Resolution

Add an approved issue reference in the "Related GitHub Issue" section, provide a detailed "Test Procedure" section, complete the pre-submission checklist, and address the documentation, visual snapshot, video, additional notes, and contact sections as applicable.

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Inline comments:
In `@src/services/code-index/code-index-scope.ts`:
- Around line 15-20: In the CodeIndexScope initialization flow, dispose the
CodeIndexStatusManager if manager.init() throws, then rethrow the error; assign
statusManager and mark initialization complete only after init succeeds. Update
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🔇 Additional comments (11)

src/services/code-index/code-index-workspace-scope.ts (1)

1-51: LGTM!

src/services/code-index/__tests__/code-index-workspace-scope.spec.ts (1)

1-132: LGTM!

src/core/tools/__tests__/CodebaseSearchTool.workspace.spec.ts (1)

9-9: LGTM!

Also applies to: 19-19, 198-198

src/services/code-index/code-index-manager-registry.ts (1)

2-7: LGTM!

Also applies to: 16-44

src/services/code-index/__tests__/code-index-manager-registry.spec.ts (1)

5-8: LGTM!

Also applies to: 51-167

src/services/code-index/code-index-status-manager.ts (1)

1-78: LGTM!

src/extension.ts (1)

38-38: LGTM!

Also applies to: 199-207

src/__tests__/extension.spec.ts (1)

15-15: LGTM!

Also applies to: 208-208, 242-327

src/services/code-index/__tests__/code-index-status-manager.spec.ts (1)

1-258: LGTM!

src/services/code-index/__tests__/code-index-scope.spec.ts (1)

1-49: LGTM!

src/services/code-index/manager.ts (1)

38-47: 🎯 Functional Correctness

The constructor call-site concern is refuted. Both direct constructions pass stateManager. The registry remains the public construction boundary because it creates and initializes CodeIndexWorkspaceScope, which then creates the manager.

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In `@src/services/code-index/code-index-status-manager.ts`:
- Around line 39-44: Update the provider status filter used by the
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reject status updates; reject only when workspacePath is set and differs from
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