[Arcsech]

I’ve poked around the code a bit - not thoroughly, so take this with a grain of salt - and it looks like it’s all Common Lisp. There’s a very thin JavaScript shim that applies commands from the server, but that’s pretty much the only non-CL thing.

That said, it presents as a “GUI”, but it’s really more similar to Blazor or LiveView than, say, Qt or even Electron.

[mftb]

Interesting, that part really does seem novel.