If it works anything like the memories on Copilot (which have been around for quite a while), you need to be pretty explicit about it being a permanent preference for it to be stored as a memory. For example, "Don't use emoji in your response" would only be relevant for the current chat session, whereas this is more sticky: "I never want to see emojis from you, you sub-par excuse for a roided-out spreadsheet"

It's a lot more iffy than that IME.

It's very happy to throw a lot into the memory, even if it doesn't make sense.

> you sub-par excuse for a roided-out spreadsheet

That’s harsh, man.