I have a js library I've been slowly working on for a long time now, that does similar. Rather than work a FUSE mount, it writes real files onto a file system. Still working a bit on part two, and three, which is watching changes to the file system & affecting the JS object live, and watching JS object changes & writing them to the file system. I do want it to be bidirectional. I envision it as a general tool for a lot of things, but being able to see & manipulate configuration easily is an obvious use.

I also have been meaning to extract the filesystem sync stuff out into it's own project. Right now it's a part of some other JS proxy tooling: https://github.com/rektide/prox/blob/master/plugin/write-fs....

Very fun to see some neighboring efforts! Thanks for sharing!