Developer Finds All-Green CI Pipeline Still Shipped a Broken, Unplayable Game

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A developer discovered that a fully passing test pipeline still produced a broken educational game where students could not log in, the start button did nothing, and teacher-selected questions never reached the server. After handing the code, green report, and spec to an AI reviewer without offering any personal diagnosis, the root cause was identified as unowned integration edges between modules rather than isolated bugs. Each symptom traced back to the same blind spot: the spec, task breakdown, and acceptance checklist all treated the product as discrete modules while ignoring the connections between them. More strikingly, a self-imposed rule requiring every acceptance criterion to be owned by exactly one independently verifiable task was quietly truncating cross-system requirements to only one side. The AI's finding reframed the problem entirely — the quality rule itself was the mechanism manufacturing the defect, not a safeguard against it.

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ProgrammingDEV Community ·

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