Yes I see the registry/central library being kind of like npm with a lot of React/tscircuit components that can be dropped into or used as a foundation for large designs, think <Arduino />, <MotorController /> or <Atmega /> etc. I also hope to make part substitution super easy, so equivalent subcircuits can be swapped based on part availability.
Separating into multiple repos makes some things really difficult but creates some nice boundaries. React Fiber is something that a lot of people don't understand (it's also not really officially documented as you may know!) so I wanted to separate it from "pure typescript" and the builder pattern which I think is a bit easier to grok if you're just fixing a bug etc. The codebases are a mess and I'm very eager to do some basic project hygiene- a lot of cruft accumulates over years of weekend development haha.
Thanks a ton for checking it out!!