Green Coverage, Broken Inverse: A Round-Trip Gate for Agent Patches
This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.
Agent patches can raise line coverage while destroying invertibility. A merge bar that only asks “did pytest exit 0?” will accept a codec that no longer round-trips, a normalizer that is no longer idempotent, and a test file that passed because assertions got weaker. Gate on those three signals. Co…
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- 2026-09-17 00:50 · DEV Community — AI
Green Coverage, Broken Inverse: A Round-Trip Gate for Agent Patches