core/

Package checkpoint dumps and restores process trees with CRIU (GOBLIN-DIV-018, research section 4.4/4.5).

Package logging is the one place log handlers are built.

Package mounts bootstraps the virtual filesystem hierarchy during Phase 0 of a PID-1 boot (GAPI-DIV-027), before cgroups or the event bus exist.

Package pid1 installs the explicit PID-1 signal semantics (GAPI-DIV-027).

Package procsig delivers signals to agent processes guarded by their start epoch (DDR-5, GAPI-DIV-016): a signal aimed at a dead process whose PID was recycled must never hit the new occupant.

Package shutdown is the PID-1 teardown executor (GAPI-DIV-027): a correct init shutdown is StopAll -> sync -> reverse umount -> reboot(2), replacing the naive grace + SIGKILL pattern.

Package subreaper implements the PID-1 orphan-reaping obligation (GAPI-DIV-027): the supervisor registers as a child subreaper so orphaned descendants reparent to it instead of pid 1, and a reap loop collects their exit statuses - zombie accumulation is a kernel obligation, not an optimization.

Package watchdog keeps a hardware (or software) watchdog timer fed (GAPI-DIV-027): if the supervisor hangs, the kicks stop and the device resets the machine.