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

# knowledgeSourceCitationsByThread

> Returns the knowledge sources cited by AI agent replies across a thread, each linked to the timeline entry it was cited in and carrying a snapshot title (and best-effort url) plus the live cited document when it still exists. Returns an empty list when the thread has no citations or is not visible to the caller. Requires the `thread:read` and `timeline:read` permissions.