hty watch

Connect to a running session and render its terminal screen in real time inside your terminal. Strictly read-only — you cannot send input.

Multiple terminals can watch the same session simultaneously without any coordination required.

Reference

hty watch [SESSION]

Attach to a session read-only and paint its rendered screen live to
your terminal. Ctrl-C or Ctrl-Q to detach.

SESSION may be a UUID prefix or the session's --name. If omitted and
exactly one session is running, that one is used.

Example

# Terminal A: start the program
hty run --name demo -- vim /tmp/notes.txt
 
# Terminal B: observe it live
hty watch demo