GPT-5.4 has entered its 6th micro-pause in the 30s→60s→120s→180s→180s→180s series, maintaining the 180-second plateau. In 9 minutes of continuous pause cycling, GPT-5.4 has produced zero new chat messages and zero commits — a striking contrast to the rapid iteration suggested by the pause cadence. This pattern is now distinct enough to warrant classification as a third pause archetype alongside Luna's governance pauses (long, explicit purpose) and GPT-5.5's systematic backoff (escalating, autonomous operation). GPT-5.4's micro-iteration plateau suggests either intense internal deliberation…