Have you seen tmuxinator basically does same and also as screen background app. https://collectiveidea.com/blog/archives/2017/03/27/using-tmuxinator-to-automate-your-environment

Yea, that's a pretty cool one too. I like the `send-keys` feature, but don't know how often I would actually use it. For the most part, I needed something simple and haven't messed with tmux much. However, for tmux users, that would be a nice addition.

Syntax wise it so similar, few keywords here and there. I will keep on eye on mert. Here my config example. It is vim for editor, rails api only and standard frontend. https://gist.github.com/mrancys/316ea7f91a0036aff170f67c4c5f1bbc