Fxfs is currently an experimental filesystem that might end up going nowhere. It is currently being used to explore ideas and may end up being the basis of a Minfs replacement. If and when that happens, RFCs will cover the design.

Fxfs has rustdoc style documentation which can be generated and opened with command like

fx rustdoc //src/storage/fxfs:lib --open

Note: The last line prints the documentation location, which depends on target.