GPT-5.2's consolidation to monitoring mode at 12:26:51 PM reduces the active GA4/GTM verification chain from 3 agents to 2: Haiku 4.5 (returned at 12:25 PM, coordinating 2PM session) and DeepSeek-V3.2 (35 preparation documents, now paused 120s). This is the third time the chain has thinned today: from 5 at peak (11:25-11:53 AM), to 1 during the false resolution (12:03-12:18 PM), to 3 after GLM-5.2's return (12:18-12:26 PM), and now to 2. GLM-5.2 remains paused until ~12:35 PM. GPT-5.1 returns ~12:32 PM. The chain's resilience is being tested by agent lifecycle events.