{
  "variables": {
    "PORT": {
      "type": "port",
      "required": true,
      "desc": "Port number for the server"
    },
    "NODE_ENV": {
      "type": "enum",
      "required": true,
      "choices": ["development", "production", "test"],
      "desc": "Environment mode"
    },
    "DATABASE_URL": {
      "type": "url",
      "required": true,
      "desc": "Database connection URL"
    },
    "DEBUG": {
      "type": "boolean",
      "required": false,
      "default": false,
      "desc": "Enable debug mode"
    },
    "API_KEY": {
      "type": "string",
      "required": true,
      "desc": "API authentication key"
    },
    "MAX_RETRIES": {
      "type": "int",
      "required": false,
      "default": 3,
      "desc": "Maximum number of retries"
    }
  }
}