"Retire is a headstone, not a shredder. The record stays; only the authority ends."
Remove doesn't mean erase
When you remove a Mac from the fleet, you retire it. Retirement blocks new probes, operations, terminals, and campaign targeting; it requires any active work to be resolved or closed first; it drops the machine from the active grid but keeps it under Retired; and it preserves policy, observations, operation history, and audit. What ends is authority — not the record.
Why a tombstone
Retirement leaves a tombstone: a marker that says this machine was deliberately removed. Without it, the same Mac rediscovered next week looks like a brand-new candidate, and you lose the one fact that mattered — that a human already decided it was done. The tombstone is the memory of the decision, and it's what stops discovery from silently re-enrolling a machine you meant to let go.
Retire is reversible; purge is the heavy door
Restore reactivates the same logical host after its identity and access are reverified — the history comes back with it. Purge is a separate, high-risk action, available only for a retired host with no active references, and even purge leaves a minimal audit tombstone behind. You can always get a retired machine back; you deliberately can't fully un-see a purge — which is exactly why purge is hard to reach.
The tower can't retire itself
And the rule from the first track returns: the control-plane host can't retire itself while it holds the pen. Handing off the fleet is a verified migration, not a self-erase — because a writer that deletes itself leaves no one to record that it's gone.