The Pi process produces events immediately after session creation, but
the browser's SSE connection may not be open yet (React re-render delay,
navigation). The hub discarded events with no subscribers, so the user
saw a blank session.
- Ring-buffer up to 200 events per session; replay on subscribe
- hub.clear(id) on POST /sessions/:id/close frees memory
- spawnFor now tears down any existing runtime for the same session id before
the cap check, so resume/respawn neither leaks the old child nor falsely hits
maxPiProcesses
- exit handler is identity-checked (captures rt) so a stale child's late exit
cannot evict a newer runtime
- SSE pending re-emit now sends the full ClientEvent shape
{ type: "ui_request", ui_request } to match hub.publish live events
- tests: same-id respawn replaces runtime (count 1); old child exit does not
evict new runtime; sse-hub re-emit asserts unified shape
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
User
marcopanandClaude Sonnet 4.6