Add `examples/langchain_example.py` showing `verify_agent_scope` guarding a LangChain tool. Keep it minimal and runnable. **Acceptance** - `examples/langchain_example.py` present + referenced in README - Uses the real async client API Good first issue.
Add
examples/langchain_example.pyshowingverify_agent_scopeguarding a LangChain tool. Keep it minimal and runnable.Acceptance
examples/langchain_example.pypresent + referenced in READMEGood first issue.