- Add _EVENT_TYPE_TO_METHOD class-level mapping (ClassVar[dict[str, str]]) to
convert A2A event types to JSON-RPC 2.0 method names:
TaskStatusUpdateEvent → task/statusUpdate
TaskArtifactUpdateEvent → task/artifactUpdate
- Refactor SseEventFormatter.format() to produce JSON-RPC 2.0 notification
envelope: {"jsonrpc": "2.0", "method": "...", "params": {...}}
- Move event data fields into params object; include taskId (from plan_id)
in params when plan_id is present, per spec §Streaming Architecture
- Remove non-spec fields (event_id, event_type, timestamp, plan_id) from
the data payload; these remain in SSE envelope headers (event: and id:)
- Update BDD feature to verify JSON-RPC 2.0 structure for both event types,
events with/without plan_id, custom data in params, and exclusion of
non-spec fields
- Fix pre-existing type errors in step definitions: replace try/except
ImportError pattern with direct imports and use behave.runner.Context
for proper static typing (0 pyright errors)
ISSUES CLOSED: #1502
freemo