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Re:Show HN: Rssfs – An RSS reader written as a file system by tyingq on Sunday May 10, 2020 @04:22PM (#23135818)
Winfsp maybe? It has a fuse compatibly layer (see fuse.h in the repo).

http://www.secfs.net/winfsp/

Re:Show HN: Rssfs – An RSS reader written as a file system by rhabarba on Monday May 11, 2020 @12:23AM (#23138887)
I am working on it. Slowly. (see driver-winfsp.go.)