Abstract We present a replay-verifiable epistemic authority architecture for maintaining state integrity under adversarial conditions. Unlike conventional systems that collapse cognition, evidence generation, and authority into a single optimization process, the proposed architecture enforces strict separation m between cognition, evidence, and authority. State mutation occurs only when admissible transitions satisfy deterministic governance constraints and are recorded within an immutable event chronicle. Truth is defined not as stored state but as the unique replay-reconstructable state induced by an admissible event history. Instrumentation provides evidence without authority. Cognition generates proposals without authority. Authority admits transitions without generating evidence. The resulting architecture provides replay-verifiable truth, metric-capture resistance, capability-secure execution, and observational convergence under admissible schedules.