A Prism program is running and printing a labeled sequence, one line per step, each naming its count. Pick where to pause it. Its whole live computation freezes into a portable continuation snapshot, flies to a second browser tab, and that tab checks the code hash matches and resumes exactly where the first tab stopped, carrying the same count forward without re-running a single earlier step.
Tab A, running then paused
Tab B, resumes here
same-origin BroadcastChannel
waiting for a receiver
Tab A pauses after the line you choose; Tab B picks up the very next one. Press Teleport to send the paused continuation across.