The handover named TUIOS but never said plainly that it is not tmux, how a session is
created on each machine, that workspaces vanish when empty and renumber, that TUIOS keeps
h/j/k/l in window mode, or how to drive a pane from a script. All of it is now in
docs/TUIOS-RUNBOOK.md, referenced first in AGENTS.md and README.
