Hi, I've been working on documenting ZScript's core language and API for a month or so (more like a week of actual work) so here you go.
here is thing
This isn't on the wiki because I really don't like writing wikitext and because it isn't finished yet. The core language documentation is mostly done but the API needs lots of work as it is rather gigantic and makes up most of anyone's usage of ZScript. I'm putting this here because even in its currently unfinished state it's still useful and has lots of things that are not documented anywhere else. Feel free to ask questions, suggest edits, &c.
If you'd like to contribute (and acknowledge that this documentation is public domain and so your contributions will as well be,) don't hesitate to get at me on Discord, in the "#eldritch-rust" channel on my public server.