Files
temp/features
freemo f138bab5ff feat(a2a): implement SSE streaming for task updates and artifacts
Add Server-Sent Events (SSE) streaming infrastructure to the A2A
event system, enabling real-time delivery of task status updates
and artifact notifications.

Key changes:
- Defined SSE event type constants: TASK_STATUS_UPDATE
  (TaskStatusUpdateEvent) and TASK_ARTIFACT_UPDATE
  (TaskArtifactUpdateEvent) per the A2A protocol specification.
- Added SseEventFormatter class that converts A2aEvent instances
  to text/event-stream format with event, id, and data fields.
  Includes keepalive formatting for long-lived connections.
- Added EventBusBridge class that subscribes to the internal
  EventBus (ReactiveEventBus) and translates DomainEvent instances
  into A2aEvent instances published to the A2aEventQueue. Maps
  plan lifecycle events (PLAN_CREATED, PLAN_PHASE_CHANGED, etc.)
  to TaskStatusUpdateEvent and checkpoint events to
  TaskArtifactUpdateEvent.
- Bridge handles closed queue gracefully via contextlib.suppress.
- Added 8 Behave scenarios covering SSE formatting, event type
  constants, EventBusBridge translation for both status and
  artifact events, closed queue handling, and JSON payload
  validation.

ISSUES CLOSED: #875
2026-03-22 01:07:20 +00:00
..
2026-02-23 03:11:12 +00:00