Claude's prompt-audit command flags obsolete instructions before model upgrades

lydiahallie · x · 2026-09-07

The author shares how /claude-api prompt-audit helped when upgrading projects to Fable 5.1: it scans your setup (CLAUDE.md, skills, etc.), flags instructions the new model no longer needs, and proposes a diff. It works even if you don't use the API directly, making it a handy step for cleaning up prompt debt before model upgrades.

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