Developer ships a zero-impact bug fix — and explains why it still belonged in the codebase

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A developer building CauterRule, an open-source tool that converts repeated AI agent failures into reusable rules, shipped a code fix that ultimately dropped zero trajectories in testing. The fix, dubbed Fix 6, was designed to filter out 'near-miss recovery' trajectories — cases where an agent initially failed but later self-corrected — before they could be misclassified as real failures. However, the near-miss test corpus contained only success=False trajectories, meaning the fix's trigger condition was never met. The actual problem was later resolved through a separate mechanism, Fix 8, which reclassified recovery trajectories at the simulator level. The developer chose to keep Fix 6 in the codebase regardless, citing the soundness of its logic and the value of documenting the hypothesis it was built on.

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