ARK-488 — Authority Engine · P95 Decision Latency

ARK-488 — ExecutionProof P02 Latency/Throughput/Scale series by Remnant Fieldworks Inc. Measures warm per-decision latency of the reference Authority Engine — the latency an at-execution "does this principal still hold this authority?" check adds to the critical path. Verdict: PASS. Warm p95 0.32 µs, p99 0.41 µs over 200,000 decisions; threshold p95 ≤50 µs. 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.