Audit, score, or improve existing skills using repository checks, Tessl plugin lint, optional credit-aware Tessl review, metadata checks, repo conventions, and skill-authoring best practices. Prefer free lint over cloud review except for publish-ready 100-point scores. Use when creating or revising a skill, asking why a skill did not activate, checking skill quality, comparing a skill against `AGENTS.md`, `CLAUDE.md`, or repo rules, or preparing a skill for publish. Do not use to verify general application code or to rewrite unrelated docs.