Agent Skills Drift: Closing the Gap Between Skill Instructions and Reality

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A DEV Community guide explains how agent skills, which are sets of instructions and scripts, accumulate drift as the external tools and formats they describe change. Using the publishing-kit skill for Claude Code, Codex and Antigravity as a working example, the author shows that its pre-flight check passed while a code review still surfaced 22 issues. The article notes that installed skill snapshots can lag the repository by many commits, and that unchanged version strings can hide behavioral changes. It recommends a repeatable feedback loop, including testing checks against inputs they must reject and consolidating duplicated logic across scripts.

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