Most AI safety tooling today operates like a firewall: inspect the prompt, inspect the output, and hope nothing slips through. That model breaks the moment an agent is allowed to plan, call tools, or iterate across multiple turns.
Stateful governance treats compliance as a continuous property of the system, not a one-time check. By anchoring every decision to a committed kernel of identity, policy, and provenance, Theseus Guard makes drift detectable before it becomes an incident.
In this post we walk through the three evaluation layers of TG-Sentinel and explain why enforcement latency under 400ms changes the economics of safe autonomy.