Validate Skill Quality

Skill Validation

Schema-based skill validation for Claude Code skills.

When to Use

Auto-activates when:

• User asks to "validate skill"
• After creating or modifying a skill
• User asks "check my skill"
• Skill not working as expected

Validation Process

1. Locate Skill

# If in skill directory
/skill-creator:validate-skill-structure

# Or specify path
/skill-creator:validate-skill-structure skills/my-skill

2. Load Validation Schemas

Read schemas from skills/validation/schema/:

• skill-frontmatter.md - SKILL.md frontmatter validation
• skill-structure.md - Folder and file structure validation
• when-to-use.md - "When to Use" section requirements
• content-quality.md - Content completeness and clarity

3. Run Validation Checks

Checks:

1. Folder structure (skill-structure.md)
2. SKILL.md frontmatter (skill-frontmatter.md)
3. "When to Use" section (when-to-use.md)
4. Content quality (content-quality.md)

4. Report Results

Validating: my-skill/

Structure
=========
✓ Is a directory (not flat .md file)
✓ Contains SKILL.md (uppercase)
✓ Folder name matches skill name

Frontmatter
===========
✓ Valid YAML syntax
✓ name: my-skill (kebab-case)
✓ description: Clear and concise (42 chars)
⚠ user-invocable: Consider adding 'false' if auto-only

"When to Use"
=============
✓ Section present
✓ Clear triggering conditions
✓ User invocation format included
✓ Auto-activation keywords listed

Content Quality
===============
✓ Clear purpose statement
✓ Step-by-step process
✓ Examples provided
⚠ Consider adding edge cases

Summary
=======
✓ 12 passed
⚠ 2 warnings
✗ 0 errors

Ready to use!

Validation Levels

✓ PASS - Skill is ready to use ⚠ WARNING - Works but has recommendations ✗ ERROR - Critical issues, must fix

Schema Files

All schemas are in skills/validation/schema/:

skill-frontmatter.md

Defines valid SKILL.md frontmatter:

• Required: name (kebab-case), description
• Optional: user-invocable (false for auto-only)

skill-structure.md

Defines folder structure:

• Must be directory (not flat .md)
• Must contain SKILL.md (uppercase)
• Folder name must match skill name

when-to-use.md

Defines "When to Use" section:

• Required section
• Clear triggering conditions
• User invocation format
• Auto-activation keywords

content-quality.md

Defines content requirements:

• Clear purpose
• Step-by-step process
• Examples
• Edge cases

Integration

Works with:

• skill-validator agent (uses schemas)
• skill-creator:create (creates valid structure)
• skill-creator:edit (validates after editing)