{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://agentguides.io/schemas/0.1/book.schema.json",
  "title": "BOOK.md frontmatter",
  "description": "JSON Schema for the YAML frontmatter of a Book's BOOK.md file (SPEC §15a). Generated from agentguides.spec.book.",
  "$defs": {
    "BookGuideEntry": {
      "additionalProperties": false,
      "properties": {
        "id": {
          "description": "Kebab-case id of a child Guide; matches a book subdirectory.",
          "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
          "type": "string"
        },
        "role": {
          "enum": [
            "primary",
            "recovery",
            "reference"
          ],
          "type": "string"
        }
      },
      "required": [
        "id",
        "role"
      ],
      "type": "object"
    }
  },
  "additionalProperties": false,
  "properties": {
    "id": {
      "description": "Unique kebab-case identifier for the book.",
      "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
      "type": "string"
    },
    "title": {
      "description": "Human-readable title for the book.",
      "minLength": 1,
      "type": "string"
    },
    "version": {
      "description": "Semver version for the book.",
      "pattern": "^\\d+\\.\\d+\\.\\d+(?:-[0-9A-Za-z.-]+)?(?:\\+[0-9A-Za-z.-]+)?$",
      "type": "string"
    },
    "description": {
      "description": "One-paragraph summary of what the book covers.",
      "minLength": 1,
      "type": "string"
    },
    "guides": {
      "description": "Ordered list of child Guides (order is informational). May be empty — a freshly-initialized book starts with zero Guides and has them added over time.",
      "items": {
        "$ref": "#/$defs/BookGuideEntry"
      },
      "type": "array"
    },
    "authors": {
      "items": {
        "type": "string"
      },
      "type": "array"
    }
  },
  "required": [
    "id",
    "title",
    "version",
    "description",
    "guides"
  ],
  "type": "object"
}