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Mutate Golden Cases Before You Trust the Eval

This story is from 2026-09-11. It is preserved in the archive; the latest stories are on the live feed.

A prompt eval that cannot fail a mutated golden case will not catch a silent regression. Green builds in that situation measure grader blindness, not model stability, and they age poorly after endpoint swaps. Store a negative control beside each happy-path fixture, then refuse the suite when that c…

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  1. 2026-09-11 16:47 · DEV Community — AI
    Mutate Golden Cases Before You Trust the Eval

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