Agent Skill Validator

Validate your SKILL.md files against the Agent Skills specification before publishing.

Paste a GitHub URL to a SKILL.md file or its containing folder.

Validation Rules

This validator checks the YAML frontmatter. See the full specification for complete requirements including directory structure and body content.

name - Required. Max 64 characters. Lowercase letters, numbers, and hyphens only. Cannot start/end with hyphen or contain consecutive hyphens.
description - Required. Max 1024 characters.
compatibility - Optional. Max 500 characters.
allowed-tools - Optional. String.
license - Optional.
metadata - Optional. Object.
body - Required. Markdown content must follow the frontmatter.