---
title: "ReasoningSummaryPartAddedEvent"
---

Event emitted when a reasoning summary part is added


## Fields

| Field                                                                                                | Type                                                                                                 | Required                                                                                             | Description                                                                                          | Example                                                                                              |
| ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| `item_id`                                                                                            | *str*                                                                                                | :heavy_check_mark:                                                                                   | N/A                                                                                                  |                                                                                                      |
| `output_index`                                                                                       | *int*                                                                                                | :heavy_check_mark:                                                                                   | N/A                                                                                                  |                                                                                                      |
| `part`                                                                                               | [components.ReasoningSummaryText](../components/reasoningsummarytext.mdx)                             | :heavy_check_mark:                                                                                   | N/A                                                                                                  | \{<br/>"text": "Analyzed the problem using first principles",<br/>"type": "summary_text"<br/>}        |
| `sequence_number`                                                                                    | *int*                                                                                                | :heavy_check_mark:                                                                                   | N/A                                                                                                  |                                                                                                      |
| `summary_index`                                                                                      | *int*                                                                                                | :heavy_check_mark:                                                                                   | N/A                                                                                                  |                                                                                                      |
| `type`                                                                                               | [components.ReasoningSummaryPartAddedEventType](../components/reasoningsummarypartaddedeventtype.mdx) | :heavy_check_mark:                                                                                   | N/A                                                                                                  |                                                                                                      |