Acceleration Plane. Caches, counters, rate limits, presence, sessions, locks, ephemeral state. Disposable — lose it and the system slows; nothing becomes wrong. Rebuildable from truth in milliseconds.
Queues, locks, leases, and timers in this plane should be dispatch hints, not durable work records. If losing the hint loses the obligation, the Acceleration Plane has become a second truth plane.
CapBan's score windows are the small-form example: they help threshold rules run quickly, but they are not audit, policy, or authoritative ban state.