Constitutional AI v3 + Microsoft AI Red Team: training-time safety + red-team safety — the two ends of the safety pipeline

Anthropic Constitutional AI v3 (multi-stage training with explicit principles, harmlessness reward model + helpfulness reward model, public critique-revision loop) and Microsoft AI Red Team + AI Risk Shadow Model (internal red-team tracking, shadow-model metrics, red-team workflow stages) define two different ends of the safety pipeline. Constitutional AI works at training time — embedding principles into the model's reward model so the trained behavior reflects those principles. AI Red Team works after deployment — actively probing for vulnerabilities and tracking them through a shadow-model framework. The two are complementary: training-time safety gives a baseline; red-team safety catches what the baseline missed.