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Stop invoking the whole graph to test one node: unit tests and checkpoints for my LangGraph agent

After part 3, my LangGraph graph worked. It also had exactly one test: run it, look at the verdict, shrug. Every edit to judge_node meant rerunning the whole graph and hoping the retries would still stop after three calls, and hope is a lousy CI stage. The spend policy of my agent, the code that de…

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  1. 2026-11-10 08:44 · DEV Community — AI
    Stop invoking the whole graph to test one node: unit tests and checkpoints for my LangGraph agent

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