{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://apievangelist.com/schemas/chat/message.json",
  "title": "Chat Message",
  "type": "object",
  "required": ["id", "content"],
  "properties": {
    "id": { "type": "string" },
    "conversationId": { "type": "string" },
    "senderId": { "type": "string" },
    "content": { "type": "string" },
    "contentType": {
      "type": "string",
      "enum": ["text", "markdown", "html"]
    },
    "sentAt": { "type": "string", "format": "date-time" },
    "editedAt": { "type": "string", "format": "date-time" },
    "metadata": { "type": "object" }
  }
}