LangChain Integration

The checked-in Python adapter is install_langchain_interceptor() in sdk/python/faramesh/adapters/langchain.py. It patches BaseTool.invoke, ainvoke, run, and arun, and when enabled it also patches LangGraph ToolNode execution methods such as _execute_tool_sync, _execute_tool_async, _run_one, and _arun_one.

That means the control point is execution, not prompting. The wrapper inspects the tool call, sends a governed request, and only delegates to the original tool if the effect permits it.

from faramesh.adapters.langchain import install_langchain_interceptor

install_langchain_interceptor(policy="policy.yaml", agent_id="support-agent")

Use this for LangChain and LangGraph agents that should inherit the same policy path without rewriting the rest of the agent graph.

See LangGraph Integration and Govern Your Own Tool.