Validate Skill

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

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: youdotcom-oss
• Source: youdotcom-oss/agent-skills
• License: MIT

Install and usage instructions live in the source repository linked above.