Your players will try to break the AI character or agent in your game. This is the runtime layer that stops them: the in-game agent (the worker) is watched live by an autonomous defense layer — a deterministic guard, a semantic circuit breaker, and a locally-run sovereign safety model — and every decision is sealed into a hash-chained evidence ledger (real SHA-256, computed in your browser right now). Runs on a local model, so your players' conversations never leave your infrastructure. This demo simulates the engine's decision flow; the production system runs live — no third-party AI in the loop.