Review and improve your skill with actionable recommendations. Reviews the whole bundle, validates syntax and references, explains rubric, shows before/after scores, and edits the SKILL.md and its reference docs. Use when reviewing skill quality, improving a SKILL.md or its reference files, checking scoring dimensions and quick wins, auditing progressive disclosure and orphaned bundle files, generating improvement recommendations, running a post-edit quality audit, creating approval-gated change proposals, or automating the skill review workflow. For the full optimization cycle (review + evals + improve), use `optimize-skill-performance-and-instructions`.