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## Kanban Real-time Sync (NEW-002)
- Backend:
- WebSocket endpoint: /ws/projects/{project_id}
- Project room management in ConnectionManager
- Redis Pub/Sub: project:{project_id}:tasks channel
- Task CRUD event publishing (5 event types)
- Redis connection retry with exponential backoff
- Race condition fix in broadcast_to_project
- Frontend:
- ProjectSyncContext for WebSocket management
- Reconnection with exponential backoff (max 5 attempts)
- Multi-tab event deduplication via event_id
- Live/Offline connection indicator
- Optimistic updates with rollback
- Spec:
- collaboration spec: +1 requirement (Project Real-time Sync)
- 7 new scenarios for real-time sync
## Workload Cache Fix (NEW-001)
- Added cache invalidation to all task endpoints:
- create_task, update_task, update_task_status
- delete_task, restore_task, assign_task
- Extended to clear heatmap cache as well
## OpenSpec Archive
- 2026-01-05-add-kanban-realtime-sync
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>