Looks great, it was actually just playing around yesterday with `code canvas app` which is similar, and also Charkoal.dev and Haystack Editor (before code-review pivot) which are related. Yours looks better than any of them already!

I wish it was available in Cursor as well though. Not sure how exactly they manage their marketplace, most VSCode extensions seem to be there but now and then I encounter one that is missing for no apparent reason.