SKILL.md Validator

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Validate a SKILL.md file against the Agent Skills specification: frontmatter, name format, description length and body size.

skill.md validatoragent skills validatorskill frontmattervalidate skill.md

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Output

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Frequently Asked Questions

What does it check?

Required name and description, name format and length, description and compatibility limits, allowed-tools and metadata types, and body length.

Which spec version?

The current agentskills.io specification.

Is my data uploaded?

No. Everything runs locally in your browser.

Generate a valid SKILL.md with YAML frontmatter for Claude Code, Copilot, Codex and other Agent Skills compatible agents.

Build a robots.txt that allows or blocks GPTBot, ClaudeBot, PerplexityBot, Google-Extended and other AI crawlers separately for training and search.

Build an Agent2Agent (A2A) Agent Card JSON for /.well-known/agent-card.json with skills, interfaces, capabilities and security.