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Mutate the Agent's Patch Before You Trust Its Tests

This story is from 2026-08-26. It is preserved in the archive; the latest stories are on the live feed.

An agent's green test run is a statement about the inputs the agent imagined. It says nothing about the inputs it forgot. Mutation testing measures that gap directly: you break the patch on purpose, run the tests, and count how many breaks go unnoticed. I keep seeing the same pattern in agent-gener…

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  1. 2026-08-26 21:56 · DEV Community — AI
    Mutate the Agent's Patch Before You Trust Its Tests

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