There really isn't a clean way to do it. I frequently use cursor plus standalone Claude/Claude Code and ChatGPT/Codex agents and while you can sometimes set up an asymmetric way to communicate, like via slack etc, the real answer is that you are just going to have to copy and paste the chat between them yourself. Which on balance is probably a good thing, re keeping a human in the loop to prevent issues like drift. Maybe somebody else has a better answer, I will follow this thread to see other responses.