{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Skill Frontmatter",
  "description": "Frontmatter schema for SKILL.md files in chrisbanes/skills",
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Skill name, must match the directory name",
      "minLength": 1,
      "maxLength": 64,
      "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$"
    },
    "description": {
      "type": "string",
      "description": "What this skill does and when it should be used",
      "minLength": 1,
      "maxLength": 1024
    },
    "license": {
      "type": "string",
      "description": "License name or reference to a bundled license file"
    },
    "compatibility": {
      "type": "string",
      "description": "Environment requirements",
      "minLength": 1,
      "maxLength": 500
    },
    "metadata": {
      "type": "object",
      "description": "Client-defined string metadata",
      "additionalProperties": {
        "type": "string"
      }
    },
    "allowed-tools": {
      "type": "string",
      "description": "Space-separated pre-approved tools"
    },
    "disable-model-invocation": {
      "type": "boolean",
      "description": "Claude Code extension that restricts a skill to explicit invocation"
    }
  },
  "required": ["name", "description"],
  "additionalProperties": false
}