agent_executor_typingTier 1 · 70% confidence

ai-agents-agent-executor-typin-when-using-an-lcel-runnable-as-the-agent-parameter-35e29ae5

agent: ai_agents

When does this happen?

IF When using an LCEL Runnable as the agent parameter in AgentExecutor constructor, a type error occurs because the agent property only accepts BaseSingleActionAgent or BaseMultiActionAgent.

How others solved it

THEN Expand the type annotation of the agent property in AgentExecutor to accept Runnable (e.g., Runnable[Dict[str, Any], Any]) or provide a classmethod like AgentExecutor.from_runnable_and_tools that wraps the Runnable into a proper agent object for runtime compatibility.

# Problem: agent = {...} | prompt | llm | OpenAIFunctionsAgentOutputParser()
# agent_executor = AgentExecutor(agent=agent, tools=tools)  # type error
# Fix: either update AgentExecutor.__init__ to allow Runnable, or use:
# agent_obj = RunnableAgent(runnable=agent)
# agent_executor = AgentExecutor(agent=agent_obj, tools=tools)

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