You don't need anything beside regular tmux for that, since if your computer crashes but not the remote host, and if you were using tmux on the remote host, the

You don't need anything beside regular tmux for that, since if your computer crashes but not the remote host, and if you were using tmux on the remote host, the tmux session will still be open, just ssh again and "tmux -a" and you'll jump back into the tmux session exactly where you left it.