This lets Claude run Repomix CLI to analyze codebases, either from GitHub URLs or local directories. You ask something like "analyze the facebook/react repo" or "what's the structure of this project" and it executes the appropriate repomix command, reads the generated output file, and gives you insights on structure, patterns, or metrics. The skill defaults to XML output and knows to use compression for large repos. Honestly most useful when you need a quick orientation in an unfamiliar codebase or want to find specific patterns across files without manually grepping. It outputs remote repos to /tmp by default to avoid cluttering your workspace, which is a nice touch.
npx skills add https://github.com/yamadashy/repomix --skill repomix-explorer