- Share one visible-tab connection across a browser and harden retries.\n- Preframe hub events, disconnect slow clients, and reset idle heartbeats.\n- Add cross-tab, concurrency, race, and fanout benchmark coverage.
Close long-lived SSE streams before HTTP shutdown so graceful shutdown is not held until the deadline. Also wait for background runners before closing the store to make shutdown ordering explicit.
- Fix duplicate SSE event on comment creation: CreateMemoComment now
suppresses the redundant memo.created broadcast from the inner
CreateMemo call, emitting only memo.comment.created
- Extract reaction event-building IIFEs into buildMemoReactionSSEEvent
helper, removing duplicated inline DB-fetch logic
- Promote resolveSSEAudienceCreatorID from method to free function
(resolveSSECreatorID) since it never used the receiver
- Add userID to SSE connect/disconnect log lines for traceability
- Change canReceive default from permissive (return true) to
deny-with-warning for unknown visibility types
- Add comprehensive tests covering all new helpers, visibility edge
cases, slow-client drop behavior, and the double-broadcast fix
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
