{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Message",
  "title": "Message",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The identifier of the message"
    },
    "object": {
      "type": "string",
      "enum": [
        "thread.message"
      ]
    },
    "created_at": {
      "type": "integer",
      "description": "Unix timestamp of creation"
    },
    "thread_id": {
      "type": "string",
      "description": "The thread this message belongs to"
    },
    "role": {
      "type": "string",
      "enum": [
        "user",
        "assistant"
      ],
      "description": "The role of the entity that produced the message"
    },
    "content": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "type": {
            "type": "string",
            "enum": [
              "text",
              "image_file",
              "image_url"
            ]
          },
          "text": {
            "type": "object",
            "properties": {
              "value": {
                "type": "string"
              },
              "annotations": {
                "type": "array",
                "items": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "description": "The content of the message"
    },
    "assistant_id": {
      "type": "string",
      "nullable": true,
      "description": "The assistant that authored this message"
    },
    "run_id": {
      "type": "string",
      "nullable": true,
      "description": "The run associated with this message"
    },
    "metadata": {
      "type": "object",
      "description": "Key-value metadata attached to the message"
    }
  }
}