Validate Skills

If you're publishing skills to the Claude Code marketplace, this validates your SKILL.md files against the agentskills.io spec and catches common mistakes before submission. It checks the obvious stuff like name format and description length, plus Claude-specific best practices like keeping skills under 500 lines and avoiding nested references. Made by Callstack, who clearly got tired of manual review. The validation checklist is well structured with specific rules for both spec compliance and style guidelines. Run it with /validate-skills and you'll get a pass/fail report for each skill in your repo. Saves you from the embarrassment of publishing a skill where the directory name doesn't match the frontmatter.

Install to Claude Code

npx -y skills add callstackincubator/agent-skills --skill validate-skills --agent claude-code