How close are you to getting a "full" implementation of R6RS? I've been thinking of picking either your project or Steel[0] for a Rust Scheme thing

[0] https://github.com/mattwparas/steel

I’m hoping by the end of the year. All of the “difficult” things are finished (control flow, syntax transformers, call/cc, dynamic wind, exceptions, libraries, etc) and it’s just a matter of filling missing base library functions. If there’s something in particular that you need you’re welcome to file and issue or post a message on the discord and I’ll prioritize it.

That being said, Steel is excellent and I highly recommend it if you just need R5RS with syntax transformers