Server-side improvements (ALL 27/27 TESTS PASSING):
- Add streamEventsFrom() method with lastEventId parameter for resuming streams
- Include event IDs in SSE messages (id: event-123) for reconnection support
- Send retry interval header (retry: 3000ms) to clients
- Classify errors as retryable vs non-retryable
- Handle transient errors gracefully with retry logic
- Support Last-Event-ID header in controller for automatic reconnection
Files modified:
- apps/api/src/runner-jobs/runner-jobs.service.ts (new streamEventsFrom method)
- apps/api/src/runner-jobs/runner-jobs.controller.ts (Last-Event-ID header support)
- apps/api/src/runner-jobs/runner-jobs.service.spec.ts (comprehensive error recovery tests)
- docs/scratchpads/187-implement-sse-error-recovery.md (implementation notes)
This ensures robust real-time updates with automatic recovery from network issues.
Client-side React hook will be added in a follow-up PR after fixing Quality Rails lint issues.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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