Next steps (LangChain):
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  1. Install the Python adapter (required for runtime enforcement):
     pip install aport-agent-guardrails-langchain
     aport-langchain setup
  2. Config written to: $config_dir
  3. Add to your agent:

     from aport_guardrails_langchain import APortCallback
     agent = initialize_agent(..., callbacks=[APortCallback()])

  See: docs/frameworks/langchain.md