3. more ephemerally, i have a little bare-bones baseline-style compile-to-c scheme in the works. uses the c control stack but a side value stack, so as to have packed GC roots. the compiler is in scheme of course. the intent is to be a useful-enough approximation of a production system to use when testing https://github.com/wingo/whippet-gc/. who knows if it is fit for purpose though; will publish when it works 🤪