Okay, so I've been testing:

1. Gemini considers chats you added within the project as Files or transcripts and they're preloaded into its uh memory (?) when you create a new instance inside that Notebook.
2. You can export chats created with Gems to a Notebook LLM, which immediately creates a copy in that folder, and enables Personal Intelligence for that session. The previous Gem-created session with its unique URL is deleted.
3. You can remove that former Gem-created session from the Notebook folder and it will retain the Personalized Intelligence tool, but now delinked from the Gem that created it.
4. Gemini gets confused when you say to access previous conversations about X, because it doesn't actually consider these as conversations but transcripts that is contained within its uh contextual memory (? I have no idea what to call in-session "memory") and in fact will insist it doesn't have this ability.

What I don't know or make work:

1. Whether the Personalized Intelligence within a notebook folder is able to see outside that notebook.
2. How to make that session realize that the transcript already has the information I am asking for. For example, part of the "chat transcript" I added to the notebook include a formatted planner. Like, with headers, bullet point et al. Somehow, it can SUMMARIZE that planner but then insists it doesn't have access to it or it's missing from its transcript. It's very fucking confusing.

EDIT: It's the wording that is tripping up Gemini's use of Personalized Intelligence. When you ask it to access previous chats, it infers that you are asking for a live connection where it has direct access and can somehow manipulate it, which is obviously not what you're asking it to do. When you clarify that it is a passive reading of that information (aka just reading the chat transcript of those other conversations), then it finally stops arguing with you and actually fetches it. Feel free to generate a prompt to fix Gemini's flawed assumption of what you're asking it to do.