Stairwell Pass Stamp Afteruse Mechanics
The mechanic is state-pressure entry: a visible stairwell pass stamp and a future route consumption attempt must both be present. Branches can certify the narrow crossing, restrict the reader, attach a guard-log bridge, reopen the harmed evacuee claimant objection, split crossing presence from evacuation authority, quarantine afteruse, or accept a false-clean default that makes future routes recovery-only.