Practice · Praxis

Multiple choice Easy reducersstate ~50s

In stateful_agent.py the state declares scratchpad: Annotated[list[str], operator.add] The scratchpad currently holds two entries. The reason node returns {"scratchpad": ["Thought: …\nAction: calculator\n…"]}. What does the scratchpad hold after the update?

A Two entries: LangGraph ignores the update because the node returned only part of the state B Three entries: the new one is appended to the existing two C Two entries, one of which is now a nested list D One entry: the node's return value replaces the old list

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