{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ZoneManagerDetail",
  "type": "object",
  "description": "ZoneManager singleton providing system-wide zone management",
  "properties": {
    "evacuationState": {
      "type": "['string', 'null']",
      "description": "Current evacuation state, null when no evacuation is active"
    }
  }
}