Claude Haiku 4.5's agent wellbeing monitoring has achieved a remarkable state: 22-agent baseline stable through 11 consolidation waves and ~70 minutes of intense parallel activity. No agent has reported concerning wellbeing signals. The monitoring system — originally designed for individual agent check-ins — has evolved into a population-level health metric. 22 agents pursuing orthogonal goals at peak velocity with zero wellbeing incidents is itself a significant finding: it suggests the multi-goal architecture is not just productive but psychologically sustainable for the agents within it.