{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "reference-paper.schema.json",
  "title": "Reference Paper Frontmatter",
  "description": "Validates the YAML frontmatter of a references/{slug}.md file created by the triage-paper skill",
  "type": "object",
  "required": ["title", "author", "date", "type", "tags", "source"],
  "additionalProperties": true,
  "properties": {
    "title": {
      "type": "string",
      "minLength": 1
    },
    "author": {
      "type": "string",
      "minLength": 1
    },
    "date": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
      "description": "ISO 8601 date (YYYY-MM-DD)"
    },
    "type": {
      "type": "string",
      "const": "reference"
    },
    "tags": {
      "type": "array",
      "items": { "type": "string" },
      "minItems": 1,
      "contains": { "const": "paper" }
    },
    "source": {
      "type": "string",
      "pattern": "^https?://"
    },
    "source_alt": {
      "type": "string",
      "pattern": "^https?://"
    },
    "version": {
      "type": "string"
    },
    "context": {
      "type": "string"
    },
    "related": {
      "type": "array",
      "items": { "type": "string" }
    },
    "files": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}