[wasted_intel]

It's possible to run a command in another tmux pane; I forget the specific syntax but I've tested this in the past and it works. The only thing the editor needs is a task runner (this is a planned feature for Amp); the task that's run is prefixed with the tmux command that triggers it in another pane.

The only thing that's bespoke to tmux is knowing which pane to target; you'd need to collect that from the user on the first run, or allow the value to be configured.

[em-bee]

i would split the current pane by default, and allow the user to define the whole tmux command used to splitting. (that way they can even replace tmux with something else that works instead.