Stream runtime status updates

tests/smoke/test_api_stream_chat.py

@@ -100,6 +100,9 @@ def test_stream_chat_endpoint_executes_tool_before_streaming_answer(tmp_path, mo
         body = "".join(response.iter_text())
 
     assert response.status_code == 200
+    assert 'event: runtime_status\ndata: {"task_id":' in body
+    assert '"stage": "planning"' in body
+    assert body.index('"stage": "planning"') < body.index("event: tool_call_started")
     assert "event: tool_call_started" in body
     assert "event: tool_call_finished" in body
     assert "stream tool content" in body
@@ -172,6 +175,8 @@ def test_continue_stream_executes_approved_tool_and_streams_answer(tmp_path, mon
 
     assert "event: tool_approval_requested" in initial_body
     assert response.status_code == 200
+    assert '"stage": "running_tool"' in body
+    assert body.index('"stage": "running_tool"') < body.index("event: tool_call_finished")
     assert "event: tool_call_finished" in body
     assert "event: content_delta" in body
     assert "continued after approval" in body