Watcher diagnostics invalidation now stays queued when the LSP manager is busy, rather than dropping the work and leaving stale diagnostics visible. The next drain retries the path.
Deferred classified watcher forwarding now emits the complete batch exactly once, after all diagnostics slices finish.
Tests hold the manager explicitly so watcher contention is deterministic; a probe distinguishes a failed lock attempt from a slice boundary, and an empty diagnostics phase finishes even while the manager is held.
Adds a non-ranking search descriptor for the harness fixture.
Confidence Score: 5/5
The PR appears safe to merge; no new actionable issues were found.
Summary
Watcher diagnostics now stay queued when the LSP manager is busy.
Watcher diagnostics retry when the language-server manager is busy.
The search harness lists this delivery as a non-ranking fixture.
Diagram
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Apply diagnostics for next path] --> B{Manager lock available?}
B -->|No| C[Keep path for next drain]
C --> A
B -->|Yes| D[Clear or mark diagnostics stale]
D --> E{Batch finished?}
E -->|No| A
E -->|Yes| F[Forward complete watcher batch]
