Notarized Developer ID build of the 9pfs FSKit file system. Open the disk image and drag NinePFSHost.app to Applications, open it once to register the extension, enable 9pfs in System Settings > General > Login Items & Extensions > File System Extensions, then mount with /sbin/mount -F -t 9pfs. See README for details.
Fixes a bug in v0.1.7 that could make the file system disappear from System Settings.
v0.1.7 numbered the app bundle 0.1.7, below the 1.0 that every earlier build carried. PlugInKit keeps one record per extension and prefers the highest-versioned one, so on a machine still holding a record from an older copy -- in the Trash, in ~/Downloads, or from an app deleted while its record survived -- the old record won, could not be resolved, and the extension was dropped entirely. Reinstalling did not help; neither did a reboot.
Upgrade to this release if you are on v0.1.7. If 9pfs is already missing from System Settings, installing this build is the fix.
The release tag and the bundle version are now deliberately separate: v0.1.8 ships bundle version 1.1.8, so the number PlugInKit compares only ever rises.