You're looking for `@vue/reactivity`[1] - looks like it provides ref, computed, watch, and some internals.
Honestly, this seems pretty nifty. Most projects I'd do today would likely have more value in Vue as a whole, and it's nice to see these kinds of things exposed and standalone bits
This looks cool, but standalone usage doesn't seem to be documented anywhere. The README for the above package says "For full exposed APIs, see src/index.ts."
So while Vue is not gatekeeping their reactive primitive library, they aren't exactly advertising it like Preact in a way that the average library author (like Mador's author) might even be aware of it.
Also as someone who has built React applications for more than 7+ years, I'm also still not sure what React's reactive primitive package is. Googling or asking ChatGPT has turned up nothing.
