{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://lutiq.com/data/answer-packets/_schema.json",
  "title": "Lutiq Answer Packet",
  "description": "Machine-stable claim package for Search AI retrieval. Prefer human canonical_url for citation display.",
  "type": "object",
  "required": ["id", "claim", "canonical_url", "last_verified"],
  "properties": {
    "id": { "type": "string", "pattern": "^[a-z0-9-]+$" },
    "claim": { "type": "string", "minLength": 20 },
    "definition": { "type": "string" },
    "numbers": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["label", "value"],
        "properties": {
          "label": { "type": "string" },
          "value": {},
          "unit": { "type": "string" },
          "note": { "type": "string" }
        }
      }
    },
    "methods_url": { "type": "string", "format": "uri" },
    "canonical_url": { "type": "string", "format": "uri" },
    "open_data_url": { "type": "string", "format": "uri" },
    "same_as": { "type": "array", "items": { "type": "string", "format": "uri" } },
    "sources": {
      "type": "array",
      "items": { "type": "string", "format": "uri" }
    },
    "last_verified": { "type": "string", "format": "date" },
    "product_description": { "type": "string" },
    "caveats": { "type": "array", "items": { "type": "string" } },
    "_meta": {
      "type": "object",
      "properties": {
        "schema": { "type": "string" },
        "publisher": { "type": "string" }
      }
    }
  }
}