How a Passing CI Build Silently Shipped the Wrong Data for Nine Episodes

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A developer building an AI-assisted film series discovered that automated validators were consistently reporting a clean build despite a known defect in Episode 09's visual-prompt file. The bug caused the wrong character reference image to be attached to multiple scenes, an error a human reviewer could spot instantly but the pipeline never caught. Investigation revealed two validator failures: one checked prose text for a character name that never appeared there, while the other never parsed the metadata field where the incorrect reference actually lived. The fix involved encoding the body-phase-to-reference mapping as explicit structured data in a JSON config file, supplemented by an Architecture Decision Record to replace undocumented tribal knowledge. Only after these changes did the pipeline correctly return a failing result, flagging the exact scenes with the wrong reference and confirming the validator was finally checking the right place.

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