I just used the Chat feature and asked Opus to create a notebook for interactive generation of Laver tables. It worked marvelously, but I didn’t see any option to fork it as a new Notebook, and after navigating away I seem to have lost the Chat altogether (it’s not showing up under Chats in my workspace).
I know changes come with growing pains but my experience of using this platform has been really discouraging recently. What’s going on?
Hi Matt. Did you use the Agent panel in a Notebook (in a new notebook, /new)?
Or did you use Chat (/chat)?
Only chats are currently persisted and forkable as notebooks. Conversations with the agent in a notebook are not currently saved; they’re just ephemeral, and used to edit notebooks.
That said, we are planning on saving these sidebar conversations (and supporting multiple concurrent conversations) in the future. It’s just not available yet.
I’m sorry that you’re having a bad experience. We are trying to do the best we can to build a better foundation for Notebooks, but there is a lot to do and we are a small team.
I used Chat, not the Agent panel in a Notebook, so I’m perplexed by this remark:
From my experience, I was unable to fork the chat and it was not persisted. Was I missing something in the UI? I thought I looked everywhere.
I’m not on a paid plan, could that be a factor?
Hmm. There appears to be a recent regression where chats are not being saved. Apologies. I’m investigating now. (Chats are available on the free tier so it’s not related to plans.)
Okay, this bug has been fixed!
I’m embarrassed by such a glaring bug. 
Thank you for the report and your patience. Unfortunately, we won’t be able to recover your lost chat because it was never saved.
The reason for the bug, if you’re curious, is that the chat editor considers notebooks to be “read-only” because they can only be edited through chat messages; normal cell editing affordances are disabled. And I recently changed the notebook editor so that changes aren’t saved when the notebook is read-only (fixing a different bug related to programmatic file attachments and the republish button, reported here), forgetting that this would also prevent chats from being saved.
I’m now implementing persistence for Agent conversations in notebooks, so you should soon be able to save your in-notebook chats there, too. Very sorry, again!
Click the Sharing panel icon (globe) in the sidebar and then there’s a Trash button within.
(The Sharing panel was previously called Settings, but the majority of settings were sharing-related, so…)
We’ll probably add top-level menu for common actions soon.
