Cool! I wanted to do similar things, neat idea. These days i'm wanting to try something similar but with a nice UI - i'm so tired of the Terminal, but it's hard to get away because editors like Kakoune and Vim are just so powerful.

My wish is that you or I (if i ever have the time) will implement something like this onto XiEditor. Ie, implement this as a feature to a lower level editor backend, so that you get the frontends "for free".

It drives me nuts that there's so much work done for the frontend side of things, but the backend of editors are being reinvented repeatedly for little gain.

I hope Xi can make a performant, hackable backend to plug into solid frontends.