AiOpenOrCreateResult

Resolved thread state returned by ThreadsEngine.openOrCreate.

Name	Type	Description	Notes
threadId	String	The thread that was opened, or the one just created.	[required]
title	String	Empty string for existing threads — the engine doesn't re-fetch.	[required]
priorMessages	List	The messages already in the thread - empty for a thread that was just created.	[required]