looks super cool, I have one very interesting point for you btw, You know how git tracks state, and i see that you do that too, but I feel what a "git for agents" should also do is track "Events" the why of things.
because ultimately reasoning gets lost. If i changed something, the state logs the change but why it got changed gets missed.
I know its a lot of overhead, but version managing reasoning is the next big thing.
I like to think of them as two clocks, state clock and event clock.
I usually go and look at similar style of pages that im trying to make, get some inspiration.
From what i understand by your post, you can execute the vision, so to get ideas, id say just go to sites like dribbble and such, lookup the type of thing youre trying to make.
If you want to be really creative, you can do the same thing but go even deeper, instead of pages, look at specifc art styles and concepts.
In the end designing is mostly about intuition, but this can help you get direction.