I think it's trying to be like a code-first/API alternative to Tmux. So instead of:

``` tmux new-session -d -s a

tmux send-keys -t a 'npm test' Enter

sleep 2

tmux capture-pane -p -t a ```

  you'd do something like:

``` pane.send_text("npm test\n").await?;

pane.wait_for_text("Tests passed").await?;

let snapshot = pane.snapshot().await?; ```

  I don't know why it would be better for agents, maybe the author also works on an LLM agent harness.

gobdovan nailed it. The CLI is a drop-in for existing tmux workflows; the SDK eases your flow when you'd otherwise be writing brittle send-keys + sleep + capture loop. But that's just one one of the use cases. rmux should be used to make beautiful TUI, something very dirty to do with tmux. Especially the day you want to do integration testing (playwright style)