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AI Response missing in goal disambiguation component

Missing Tool Calls Attribute in Goal Disambiguation Component

Description

An error occurs in the goal disambiguation component when checking for tool calls in the conversation history. Specifically, when the LLM clarity judge response is missing, the code attempts to access a tool_calls attribute on a HumanMessage object which doesn't exist.

Location

  • File: duo_workflow_service/components/goal_disambiguation/component.py
  • Line: ~267
  • Method: _clarification_required

Error Details

AttributeError: 'HumanMessage' object has no attribute 'tool_calls'

Stack race

	
Traceback (most recent call last):
  File "/app/duo_workflow_service/workflows/abstract_workflow.py", line 144, in _compile_and_run_graph
    async for steps in compiled_graph.astream(
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/pregel/__init__.py", line 1856, in astream
    async for _ in runner.atick(
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/pregel/runner.py", line 221, in atick
    await arun_with_retry(
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/pregel/retry.py", line 118, in arun_with_retry
    await task.proc.ainvoke(task.input, config)
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/utils/runnable.py", line 453, in ainvoke
    input = await asyncio.create_task(coro, context=context)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/utils/runnable.py", line 236, in ainvoke
    ret = await asyncio.create_task(coro, context=context)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/graph/graph.py", line 116, in _aroute
    result = await self.path.ainvoke(value, config)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langgraph/utils/runnable.py", line 224, in ainvoke
    ret = await asyncio.create_task(coro, context=context)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langchain_core/runnables/config.py", line 588, in run_in_executor
    return await asyncio.get_running_loop().run_in_executor(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/langchain_core/runnables/config.py", line 579, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/app/duo_workflow_service/components/goal_disambiguation/component.py", line 267, in _clarification_required
    if last_message.tool_calls is None or len(last_message.tool_calls) == 0:
       ^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/duo-workflow-service-9TtSrW0h-py3.11/lib/python3.11/site-packages/pydantic/main.py", line 856, in __getattr__
    raise AttributeError(f'{type(self).__name__!r} object has no attribute {item!r}')
AttributeError: 'HumanMessage' object has no attribute 'tool_calls'

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