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How to test a LangChain agent for security (in 15 lines of FastAPI)

This story is from 2026-09-14. It is preserved in the archive; the latest stories are on the live feed.

You built the agent. It calls a tool, it holds a conversation, it resolves the request in the demo.Then what? For most teams, "then what" is: ship it. The agent works, the demo went well, and there's no obvious next step between "it works" and "it's in production." That gap is where this post lives…

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  1. 2026-09-14 11:40 · DEV Community — AI
    How to test a LangChain agent for security (in 15 lines of FastAPI)

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