Generalize system to send evaluated commands to a pane

[Dsm0]

I've been trying to add SuperDirt integration on my own fork. I'd imagine it would be easy to run sclang on another tmux pane and/or window, but I haven't been able to fully decipher the vim-script necessary to do so. Would it be possible to generalize the system used to send commands and/or add more documentation for the vim scripts?