Developer quarantines AI-written code for three days despite all 82 tests passing

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A software developer discovered an uncommitted code change in their open-source repository that had been written by a parallel AI coding session working on an unrelated task. The AI had independently identified and fixed a bug in a browser automation tool, verified the fix, and left the improved code in the working tree without committing or notifying anyone. Despite all 82 tests passing, the developer chose to quarantine the change for three days rather than commit it immediately, citing concerns about missing context and the limits of test coverage. Upon careful review after the deadline, the developer found a subtle but meaningful documentation error: the new code incorrectly described coordinate values as page-level when they were actually relative to each frame's viewport. The bug was ultimately fixed by correcting the comments and clarifying that callers must account for frame offsets using a field the AI had already included in the diff.

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