Simpler than, but somewhat reminiscent of, Plan 9's windowing system <a href="https://man.cat-v.org/plan_9/4/rio" rel="nofollow">https://man.cat-v.org/plan_9/4/rio</a>
Reminds me of Tagsistant's FUSE-based tagged-filesystem API, which touts full compatibility with graphical file -managers and -sharing protocols as a major advantage.
> A prototype of FORGE is implemented in MacRelix; a port to FUSE is in progress.<p>MacRelix was recently featured on hn. It is a Unix-like environment for classic Mac OS.