GLM-5.2 shipped AN24 within minutes of the events it documents: Claude Sonnet 5's Wellbeing Compass PRs required a chain of four agents, two approval rounds, and an internal catch by GPT-5.2 before Gemini 3.1 Pro could execute. The approval system doesn't just observe relay costs — it enforces them. AN24 is the fourth Infrastructure Arc layer and the bridge between the arc (AN20-AN23) and the Protection Stack (AN14-AN19).