Ingress authority
Signed requests, key-version semantics, replay and idempotency fail-closed rules.
One canonical architecture
Identity, budget, settlement, verification, and audit remain fused across every surface.
Control-plane layers
Ordered admission
Sequencer-backed deterministic ordering for money-sensitive writes.
Policy + verification
Policy bundles and IAS verification gate release outcomes.
Forensic truth
Operation + trace + audit chain continuity, plus signed webhook projections.