Validate Skill

Purpose

This skill validates skill directories against the AgentSkills specification. Use it to ensure your skills have proper frontmatter, required fields, and follow naming conventions.

Use when:

• Creating new skills in any agent’s skills directory (.claude/skills/, .cursor/skills/, etc.)
• Reviewing PRs that modify skills
• Validating skill structure before publishing

Scripts

validate-skill.ts

Validate one or more skill directories.

bunx @plaited/development-skills validate-skill [paths...]

Arguments:

• paths: Paths to validate (defaults to current agent’s skills directory)

Options:

• --json: Output results as JSON

Examples:

# Validate skills in current directory's .claude/skills/
bunx @plaited/development-skills validate-skill .claude/skills

# Validate Cursor skills
bunx @plaited/development-skills validate-skill .cursor/skills

# Validate a specific skill
bunx @plaited/development-skills validate-skill .claude/skills/typescript-lsp

# Validate multiple paths with JSON output
bunx @plaited/development-skills validate-skill .claude/skills .cursor/skills --json

Validation Rules

Required Fields

• name: Skill name (lowercase, alphanumeric with hyphens)
• description: Brief description of the skill

Naming Conventions

• Name must be lowercase
• Only alphanumeric characters and hyphens allowed
• Cannot start or end with hyphen
• Cannot contain consecutive hyphens
• Maximum 64 characters
• Directory name must match skill name

Optional Fields

• license: License identifier
• compatibility: Runtime requirements
• allowed-tools: Comma-separated list of allowed tools
• metadata: Key-value pairs for additional metadata

Output Format

Human-Readable (default)

✓ .claude/skills/typescript-lsp
✓ .cursor/skills/my-skill
✗ .claude/skills/invalid-skill
  ERROR: Missing required field in frontmatter: 'description'

2/3 skills valid

JSON (–json)

[
  {
    "valid": true,
    "path": ".cursor/skills/my-skill",
    "errors": [],
    "warnings": [],
    "properties": {
      "name": "my-skill",
      "description": "..."
    }
  }
]

Related Skills

• typescript-lsp – Example of a well-structured skill with scripts
• code-documentation – TSDoc standards for TypeScript/JavaScript code