domains / families / agent-tooling / skill-check

skill-check

authentic

Validate Claude Code skills against the agentskills specification. Catches structural, semantic, and naming issues before users do.

When to use

• Use when user says "check skill", "skillcheck", or "validate SKILL.md"
• Use when reviewing a skill before publishing to a marketplace
• Use when debugging why a skill doesn't trigger correctly
• Use when onboarding a team to skill authoring standards
• Do NOT use for anti-slop detection, security scanning, or token analysis; use [SkillCheck Pro](https://getskillcheck.com) for those

When not to use

• Read-only: does not modify any files
• Free tier covers structural, semantic, and naming checks only
• Anti-slop, security, WCAG, token, enterprise, and workflow checks require [SkillCheck Pro](https://getskillcheck.com)
• Semantic checks (contradiction detection, wisdom/platitude) are heuristic with ~5% false positive rate
• Does not validate referenced files or scripts; only checks SKILL.md content
• Single-file validation; does not cross-check against other skills in the same directory

Skill page

Source