I noticed that icon the first time consciously and thought “let’s see what it does”.
The Session was really long and I assume it is for splitting a thread?
And maybe because of the size of the conversation it might have caused my computer to use the remaining ~20 GB of RAM and that wasn’t enough? Anyways. Linux, Ubuntu, vscode - codex extension
It creates a new Codex session from the current point so you can continue in a different direction without changing the original thread. Codex users and OpenAI’s repository describe this as “forking conversations.”
Err I mean I probably don’t leave that marked as a solution… I guess the real reason for this post was not to figure out what the icon does but to report a bug.