Termdeck does not move or copy a session to a different machine. The transcript stays in its file on the computer that ran it, which has to be awake and online for a new turn to run. To run Claude Code itself on a second machine, you copy the transcript file across by hand, and from then on the two copies are separate sessions.
1. Connect the machine the session is on
Sign up at termdeck.io/signup, then open Settings, then Machines and accounts, and choose Add machine. Paste the install command it shows into a terminal on the computer that runs Claude Code. Install details.