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Boxing: an open-source new tab where bookmarks live in boxes on an infinite canvas (Apache-2.0)
This is very AI, but it also seems like one of those things that OP has probably been dwelling on in their head and made it just for themselves. This will be unpopular, but its not the worst thing.
I'd advise OP to be content being the only one to use it. Make it for yourself exactly as you would use it. Don't bother with design decision documentation no one will ever read or user config options that are irrelevant to anyone but you. Get the concept working as you imagine, stop, and see if you can try doing the next commit without the LLM.