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Why I Hand-Rolled a ReAct Loop Instead of Using LangChain

This story is from 2026-10-16. It is preserved in the archive; the latest stories are on the live feed.

I spent two days trying to make LangChain's AgentExecutor do what I wanted. It worked. Sort of. The agent called tools. It produced answers. But I couldn't explain why it made the choices it made. When I tried to swap the LLM provider, the tracing broke. When I tried to add a second tool, the dispa…

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  1. 2026-10-16 12:08 · DEV Community — AI
    Why I Hand-Rolled a ReAct Loop Instead of Using LangChain

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