skill-check

# SkillCheck ## Overview Validate SKILL.md files against the [agentskills specification](https://agentskills.io) and Anthropic best practices. Catches structural errors, semantic contradictions, naming anti-patterns, and quality gaps in a single read-only pass. ## When to Use This Skill - 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 ## How It Works ### Step 1: Parse Read the target SKILL.md file and extract YAML frontmatter. ### Step 2: Validate Apply all Free tier checks in order: | Category | Checks | What it catches | |----------|--------|----------------| | Structure (1.x) | Name format, description WHAT+WHEN, allowed-tools, categories, XML injection | Malformed frontmatter, missing fields | | Body (2.x) | Line count, hardcoded paths, stale dates, empty sections, deprecated syntax, MCP tool qualification | Content quality issues | | Naming (3.x) | Vague terms, single-word names, gerund suggestions | Poor discoverability | | Semantic (4.x) | Contradictions, ambiguous terms, missing output format, wisdom/platitudes, misplaced triggers | Logical inconsistencies | | Quality (8.x) | Examples, error handling, triggers, output format,...