Interesting project.
Because you're building the smallest possible usable system, I'd
suggest using a port of OpenBSD doas(1) e.g.
https://github.com/slicer69/doas .
doas is smaller, simpler alternative of sudo. I think it suits your
project well.
Also, a salute to you for building an OS using tiny
Don't be surprised :D
Im built this system from scratch (https://github.com/prologic/ulinux)
Basically the build system consists of just tcc and make. I was able to get
musl libc in the mix too, but quite a few things I had to build on a
separate host system to bootstrap the system.
Anything in
