Continue a session on your captain from another Mac
Open one of your captain's sessions on another Mac, send a message and it runs there. A message that arrives twice still runs once.
Open Your Macs in Team on a Mac that is not your captain, open one of the captain's sessions and write in the box under it. The captain runs your message in that same session, and the answer shows as it comes. Stop ends the chat while it is still working.
Each message carries a receipt. The captain writes it down before it starts, so a message your Mac sends again, or that the link delivers twice, never runs a second time; one the captain turned away is turned away again with the same reason.
The captain decides what it takes. Let my other devices send chats here, in Your Macs, switches chats from your other Macs and phone on or off without touching approvals or automations.