hey I just released my first new guile project in a long time. it's called guile-bstructs and it's meant to be a rough equivalent of chez scheme's ftypes but for guile. you can use it to efficiently manipulate binary data. useful for c ffi wrappers, gpu buffer packing, and other things. I'm using it to make sdl3 bindings and so far, so good. hope it's useful to other guilers.
https://dthompson.us/posts/guile-bstructs-0-1-0-released.html