This is a meta-skill that audits other Claude skills for outdated patterns and code issues. You invoke it with `/review-skill <skill-name>` or it automatically kicks in when it detects problems. The production evidence is impressive: it caught 6 critical issues in a better-auth audit, including non-existent API imports, and removed 665 lines of bad code during a v2.0.0 migration. It runs a 9-phase audit process, though the details aren't fully spelled out here. Basically, if you're building or maintaining skills and want to catch breaking changes before they bite you, this is worth having around. The 358 installs and multiple security warnings suggest it's actively used but maybe rough around the edges.
npx skills add https://github.com/jezweb/claude-skills --skill skill-review