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

> A Thread is a series of [Turns](/core-resources/turn) and [Annotations](/core-resources/annotation) that are relevant to the entire Thread.

# Thread

A Thread can be thought of as a conversation. Each Thread is broken down into a series of [Turns](/core-resources/turn), where each Turn contains a user [Message](/core-resources/message) and any LLM response message(s).

[Annotations](/core-resources/annotation) at the Thread level apply to the entire thread as a whole, across all [Turns](/core-resources/turn).