chaim
76fd77f904
Adds POST /kb/ask/stream that returns text/event-stream. The agent
runs in a fire-and-forget task; an on_event callback wired into
AgentRunner.run pushes {type, label, ...} events into an asyncio.Queue,
and the response generator consumes them as SSE data: lines.
Event types and Hebrew labels:
- thinking — before each LLM call ("קוראת את השאלה" / "ממשיכה לחקור")
- tool_start — before each tool. For search_insurance_kb the label
includes the actual query string Shira chose, so the user can see
WHAT she's searching for ("מחפשת בבסיס הידע: '...'"). Other tools
fall back to a generic Hebrew label keyed off the function name.
- tool_done / tool_error — after each tool. For search_insurance_kb
the label echoes the first non-empty line of the tool result (which
the legal_kb tool formats as "## נמצאו N קטעים").
- writing — when the model returns text without tool calls.
- answer — final event with {text, sources, conversationId}, mirrors
the non-streaming /kb/ask response shape.
- error — runner exception; client should close the EventSource.
Heartbeats: when the queue is idle for >15s the generator yields a
": keep-alive" comment line (ignored by EventSource) so any proxy in
the path doesn't drop the connection during long agent thinks.
The original POST /kb/ask is unchanged — the streaming endpoint is
additive. Both share _build_ask_runner_context + _build_ask_messages
helpers extracted from the original handler.
Refs Task Master #1