OS design for embedded use cases, squashfs based, fully immutable (except firmware partition), A/B update based on kexec and update server included. Tested in the cloud, on real hardware (rPI) and in QEMU/KVM. Expected to work on any platform that supports kexec. This is NOT a competitive design for MicroOS or Elemental ! The design is based for systems which you don't work with. Thus there is intentionally no package database, zypper, transactional update or anything alike available. The maintenance of the system happens on the build framework not on target.