It doesn't seem that radical from the Github readme, I must say. That's not a criticism, nor at all a high bar! What you're doing appears to be trying to exist within a category that ever has had or will have any other member - so, definitionally, not "TempleOS-level crazy." :D

(Not interested in testing, sad to say. I've spent the last fifteen years trapping "I wish this shell/terminal had X feature" to "time to find a tool for X that isn't as garbage as a shell and a terminal." But I have also used Emacs for about the same length of time, and that implements its own terminal emulators, anyway.)