{
  "type": "object",
  "required": ["item_id", "title", "description", "unlock", "review_status"],
  "additionalProperties": false,
  "properties": {
    "item_id": { "type": "string", "pattern": "^[a-z][a-z0-9_]*$" },
    "title": { "type": "string", "minLength": 1 },
    "description": { "type": "string", "minLength": 1 },
    "unlock": {
      "type": "object",
      "required": ["type", "count"],
      "additionalProperties": false,
      "properties": {
        "type": { "type": "string", "enum": ["total_stars", "mission_stars"] },
        "count": { "type": "integer", "minimum": 1 },
        "mission_id": { "type": "string", "pattern": "^[a-z][a-z0-9_]*$" }
      }
    },
    "review_status": { "type": "string", "enum": ["draft", "validated"] }
  }
}