Agent Skills: refactor-cleaner

Use this skill to find and remove dead code, unused dependencies, duplicate logic, and unused exports using detection tools (knip, depcheck, ts-prune, deadcode, staticcheck). Trigger on "clean up dead code", "remove unused", "find dead code", "reduce bundle size", "dependency audit", or when the codebase feels bloated. For simplifying living code (readability, naming, complexity reduction) without detection tools, use code-simplifier instead. Use this skill during maintenance windows or before major refactors.