Installer
forinstall (23-step fresh install from the live image) and forupdate (10-step offline upgrade from local media) cover the Forest OS disk lifecycle. Both are privileged multi-file userspace apps with the same ANSI text-UI idiom.
forinstall: partitioning, formatting (ext2/ext4), ForeB sector writes,fstab/forebo.cfggeneration.forupdate: manifest, pre-apply backup, and rollback; root required.
Full reference: wiki/Userspace/Installer.md on GitHub. See also Userspace Overview, Disk Tools, and Install on a VM.