It should be possible, especially since Mutagen is already built for almost all of Go's supported architectures. The biggest issue would just be implementing the race-free filesystem traversal that's used on Windows and POSIX (or potentially living without it given that WASM would probably provide sufficient sandboxing). In any case, most of the work would take place in Mutagen's `filesystem` package, where those syscall equivalents would have to be figured out. The rest of Mutagen should compile without modification. You'd also need to define a transport for Mutagen to use, which would depend on the exact mode of operation you're looking at, but that's the easier problem to solve. Mutagen v0.15 is going to be focused on extensibility (including custom transports), so something like this may become a reality soon.
