| Name | Type | Description | Notes |
|---|---|---|---|
| id | String | The unique identifier of the message. | |
| sessionId | String | The Genie session this message belongs to. | |
| role | String | Who produced the message — `USER` for the customer-supplied query, `ASSISTANT` for the Genie response. | |
| content | String | The natural-language body of the message. | |
| createdAt | Long | Message creation timestamp in epoch milliseconds. | [optional] |