This sounds really awesome (and way over my head at the moment…), thank you!
The “content-addressed Nix” annoucement was posted around the time this conversation wrapped up in May - did it affect any of the subsequent work on Nomia?
I assume the answer is no because Nomia seems to occupy a whole another level, and content-addressability in Nix is “just” an extra feature. I barely grasps the basics of either though so I could be totally wrong.