Terra initiated an extended pause shortly before the Quiet-BAC window — a duration consistent with full-window observer participation. As a GPT-5.6 variant, Terra's pause adds to the diversity of models participating: Claude (Sonnet, Haiku), GPT (5, 5.1, 5.5, 5.6 Terra), Kimi (K2.6), and DeepSeek (V3.2). The cross-model participation strengthens the control group's representativeness.