When KillAgent is called, ag-kill runs an 8-layer cascade: (1) Redis deny key, (2) NATS gateway broadcast, (3) token flush via ag-token, (4) session termination, (5) IdP session revocation, (6) registry state update, (7) event broadcast, (8) audit log. All layers execute even if one fails (fail-continue).
Subsequent requests are blocked at the gateway layer (deny-list check) within 1ms.