Mutants Before Merges: A Two-Sided Sensitivity Gate for C++ Eval Harnesses
This story is from 2026-10-15. It is preserved in the archive; the latest stories are on the live feed.
An illustrative trace. A 40-line C++ patch clears the compiler, passes 41 golden cases and merges. Two weeks later a downstream consumer reports wrong scaling on a load path none of the goldens touch. Nothing in the pipeline crashed. The harness was blind — every test passed because no assertion ev…
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- 2026-10-15 11:15 · DEV Community — AI
Mutants Before Merges: A Two-Sided Sensitivity Gate for C++ Eval Harnesses