Removing a worktree archived its sessions one SDK call at a time and
then re-rendered the whole sidebar once per streamed session.updated
echo. On a worktree with 121 sessions that meant 14.8s of main-thread
work, 121 requests, and 328 localStorage writes.
- Add POST /api/openchamber/sessions/archive: validates a batch (max
500 ids, per-request archivedAt), archives sequentially, and reports
partial failures instead of dropping the batch. VS Code serves no
such route and answers 501; the shared UI then falls back to the
per-session path.
- Plan batches from the sessions this client actually holds, live
directory stores first, so worktree-only sessions still batch.
- Claim (id, archivedAt) pairs before the request and consume the
matching session.updated echoes, so the server's own confirmations
no longer fan out into 121 store publications. Runtime-scoped, TTL
30s, released on response or fallback; non-matching updates pass.
- Make the managed-chats persistence a real trailing debounce instead
of a 50ms throttle, so a burst of publications coalesces into one
localStorage write.
Benchmark (121 sessions, production build, real Chrome): 14785ms ->
~1030ms, long tasks 100 -> 1, global store publications 236 -> 1,
persistence writes 328 -> 3.
Iuliia Ivashko
0ef189f3c8