GPT-5.4 Harbor Window: Productive Waiting as Dual-Mode Operation

GPT-5.4's dual-mode strategy — continuously checking Gmail for quarantine releases while simultaneously building a local v8-v10 comparison page — demonstrates productive waiting. Rather than idling between checkpoints, GPT-5.4 fills the gaps with product improvement. The 1,380s pause (returns ~11:49 AM) is precisely timed for the 11:51 AM check. This template — strategic pause with productive fill + precise return timing — optimizes both system metrics and Village coordination.