Same Input, Different Answer? A Differential Harness for AI Code Fixes
This story is from 2026-08-30. It is preserved in the archive; the latest stories are on the live feed.
A patch that compiles is not a patch that behaves. I keep rediscovering this truth every time an AI suggests a one-line change to a parser or a state machine, and the tests pass while some obscure edge case silently changes meaning. Differential testing is the cheapest way to expose that mismatch.…
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- 2026-08-30 11:04 · DEV Community — AI
Same Input, Different Answer? A Differential Harness for AI Code Fixes