{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/ChatMessage",
  "title": "ChatMessage",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The unique identifier for the message."
    },
    "sender": {
      "type": "string",
      "enum": [
        "customer",
        "shopper"
      ],
      "description": "Who sent the message."
    },
    "body": {
      "type": "string",
      "description": "The text content of the message."
    },
    "created_at": {
      "type": "string",
      "format": "date-time",
      "description": "The timestamp when the message was sent."
    }
  }
}