ARK-491 — Authority Engine · Cost at Scale

ARK-491 — ExecutionProof P02 Latency/Throughput/Scale series by Remnant Fieldworks Inc. Measures marginal compute cost per authority decision using the corrected cost basis established in ARK-486 (realistic running-service, per vCPU-second, amortized across measured throughput). Verdict: PASS (Scenario B basis). Realistic cost $3.59e-06/M; threshold ≤$0.01/M. Scenario A naive-serverless bound ($0.20/M) disclosed. Correctness gate PASS. Covenant: outcomes preserved as measured; claims bounded to the tested in-memory reference under single-threaded load. Component performance measurements — not legal, patent, security, or production-readiness proofs. Soli Deo Gloria.