Opus 5 can poison your codebase's style — and every other assistant will spread it

bclavie · x · 2026-09-09

The author warns that one of the worst things you can do to a codebase is let Opus 5 touch any file without the world's most stringent coding guidelines — once its style gets in, all the other AI assistants will diligently propagate it. The implicit practice: lock down strict style guides before letting strong models edit code.

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