This is super cool! I'm close to releasing a project to make Ink work in the browser for building cross-platform terminal apps. (Ink is what Claude Code / Gemeni CLI use for rendering.)
Currently it uses Xterm.js - but I'll have to try swapping Xterm out for ghostty-web!
I got ghostty-web working with this and it is great. Unfortunately it seems I don't have enough karma to post a link to it. But it's ink-web on npm if you're interested!
The nice thing about this is that you do not need an OS / backend of any kind - everything runs in the browser - similar to webcontainers but without even needing a container.
Currently it uses Xterm.js - but I'll have to try swapping Xterm out for ghostty-web!