| Field                 | Type    | Description                                                                                                                                                                                                                                                                  |
| --------------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **messages**          | `List`  | A list of message objects generated during the conversation. Very similar to [Chat Completions `messages`](https://platform.openai.com/docs/api-reference/chat/create#chat-create-messages), but with a `sender` field indicating which `Agent` the message originated from. |
| **agent**             | `Agent` | The last agent to handle a message.                                                                                                                                                                                                                                          |
| **context_variables** | `dict`  | The same as the input variables, plus any changes.                                                                                                                                                                                                                           |