> https://github.com/philipl/pifs

That's brilliant. I also like that you don't need to store the offsets anywhere else, because that metadata is also just data that can itself be found in pi.

Actually, that sounds like one of the sects in Library of Babel, who tried to find the one true catalogue (or whatever it was) by looking for the book that told where it was, and the book that told where that book was, etc. There must be an infinite number of books that lead the way to the catalogue.