Comment by derefr

I follow the author's line of reasoning, but I think that following it to its logical conclusion would lead not to an `execute_code` primitive, but rather to an assumption that the model's stdout is appending to a (Jupyter, Livebook, etc) notebook file, where any code cell in the notebook gets executed (and its output rendered back into the inference context) at the moment the code cell is closed / becomes syntactically valid.

I say this, because the notebook itself then works as a timeline of both the conversation, and the code execution. Any code cell can be (edited and) re-run by the human, and any cells "downstream" of the cell will be recalculated... up to the point of the first cell (code or text) whose assumptions become invalidated by the change — at which point you get a context-history branch, and the inference resumes from that branch point against the modified context.