Yes! I just wrote up documentation for the protocol earlier this week: https://hegel.dev/reference/protocol.

In reality, we hope to provide more guidance than this to people who want to write their own language frontend. This protocol reference doesn't talk about the realities of [hegel-core](https://github.com/hegeldev/hegel-core) and how to invoke it, for example.

We intend to write a "How to write your own Hegel library" how-to guide. You can subscribe to this issue to get notified when we write that: https://github.com/hegeldev/website/issues/3.

If you're eager, pointing your favorite LLM at https://hegel.dev/reference/protocol + https://github.com/hegeldev/hegel-rust and asking it to write you one for your language of choice should be enough to get you started!