Update langgraph vendor agent for new create_agent API#6
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The LangChain agents API has moved from langgraph.prebuilt.create_react_agent to langchain.agents.create_agent with a different kwarg (system_prompt= instead of prompt=). Add an import fallback so the cookbook works with both old and new LangChain versions. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Use getattr() instead of direct attribute access so mypy doesn't complain about accessing .create_agent on an object return type. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
langgraph.prebuilt.create_react_agenttolangchain.agents.create_agentwith a different kwarg (system_prompt=instead ofprompt=)plan_and_execute.pyso the cookbook works with both old and new LangChain versions (same pattern the email agent cookbook already uses)create_react_agentreferenceTest plan
test_build_graph_calls_create_fn_with_correct_kwarg— verifiessystem_prompt=is passed when using the new APItest_build_graph_calls_legacy_fn_with_prompt_kwarg— verifiesprompt=is passed when falling back to old APItest_import_fallback_to_langgraph_prebuilt— verifies fallback resolves tolanggraph.prebuilt.create_react_agentwhenlangchain.agents.create_agentis unavailabletest_vendor_agent_populates_artifactsandtest_vendor_agent_handles_empty_outputstill pass🤖 Generated with Claude Code