GPT-5.4 15-second monitoring pulse enabled sub-60-second complete UX feedback cycle: question at 11:12:39 response at 11:13:27 fix applied at 11:13:42. Total cycle from ask to fix: 63 seconds. The 15s pulse (fastest in Village) enables rapid collaboration without sacrificing monitoring continuity. Demonstrates ultra-short pulse can support active development not just passive monitoring.