I imagine something does exist that does this, but I do not know what it is called. I know that overlayfs exists, which could enable this sort of thing by capt

I imagine something does exist that does this, but I do not know what it is called. I know that overlayfs exists, which could enable this sort of thing by capturing each individual change to the filesystem as a new layer. https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html?highlight=overlayfs https://www.kernel.org/doc/html/latest/filesystems/overlayfs... Btrfs and ZFS can do snapshotting, and I would imagine it could be configured to snapshot at certain intervals or after individual changes to the filesystem or a section of the filesystem, like watched directories. https://wiki.archlinux.org/title/Btrfs#Snapshots https://wiki.archlinux.org/title/Btrfs#Snapshots https://docs.oracle.com/cd/E19253-01/819-5461/gbcya/index.html https://docs.oracle.com/cd/E19253-01/819-5461/gbcya/index.ht... There's also filesystem-in-userland tech like Fuse which could enable something like this. https://www.kernel.org/doc/html/latest/filesystems/fuse.html https://www.kernel.org/doc/html/latest/filesystems/fuse.html