The premise of this series is that you should not take an agent's word that it is done. So I built a gate that makes Claude Code prove each task in a real browser before it may stop. The browser is driven by Kane CLI, which is itself an agent. The obvious question arrives late and uncomfortably: why would I take that agent's word either? This is the part of the story where the gate turns around and looks at itself. It has three layers: the verifier's failures, my own, and the rule that dec...