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    |   File "/Users/wangmir/.local/share/uv/python/cpython-3.12.10-macos-aarch64-none/lib/python3.12/contextlib.py", line 158, in __exit__
    |     self.gen.throw(value)
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/starlette/_utils.py", line 82, in collapse_excgroups
    |     raise exc
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/starlette/responses.py", line 266, in wrap
    |     await func()
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/starlette/responses.py", line 246, in stream_response
    |     async for chunk in self.body_iterator:
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/ag_ui_langgraph/endpoint.py", line 21, in event_generator
    |     async for event in agent.run(input_data):
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 107, in run
    |     async for event_str in self._handle_stream_events(input.copy(update={"forwarded_props": forwarded_props})):
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 212, in _handle_stream_events
    |     async for single_event in self._handle_single_event(event, state):
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/copilotkit/langgraph_agui_agent.py", line 169, in _handle_single_event
    |     async for event_str in super()._handle_single_event(event, state):
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/ag_ui_langgraph/agent.py", line 706, in _handle_single_event
    |     ToolCallResultEvent(
    |   File "/Users/wangmir/Works/source/cloud-vehicle-twin-2a/supervisor_agent/.venv/lib/python3.12/site-packages/pydantic/main.py", line 250, in __init__
    |     validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    | pydantic_core._pydantic_core.ValidationError: 1 validation error for ToolCallResultEvent
    | content
    |   Input should be a valid string [type=string_type, input_value=['T:"CleanupHistoryrepres...edges"edges:[UserEdge]'], input_type=list]
    |     For further information visit https://errors.pydantic.dev/2.12/v/string_type
    +------------------------------------