The host is written in Rust, with `extern "C"`, which makes it able to be loaded as a C library by programs written in other languages. Most languages have support for this.

It's also designed to be run in an event loop. I've tested this with Bun's event loop that runs TypeScript. I haven't tried it with other async runtimes, but it should be doable.

As for the browser, I haven't tried it, but you might be able to compile it to WASM -- the async stuff would be the hardest part of that, I suspect. Could be cool!