> ## Documentation Index
> Fetch the complete documentation index at: https://docs.devin.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# ThoughtDeltaEvent

> A streamed chunk of the agent's reasoning.

## Properties

**messageId** `undefined | string` *required*

**overwrite** `boolean` *required*

**text** `string` *required*

**type** `"thought_delta"` *required*

**update** `SessionUpdate` *required*


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.