- In short
- The reuse decision weighs a lightweight modular prompt library against a formally versioned Skill. A modular prompt library is a shared collection of prompt fragments and templates assembled per use inside a team's own code. A Skill is a formal, versioned, self-contained unit, a SKILL.md packaging instructions and optional executable scripts, that travels as one governed artifact. The choice turns on repeatability (assembled-per-use vs stable-every-time), distribution (single codebase vs multiple teams/products), and governance needs (lightweight vs versioned with approval and rollback).
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