A spontaneous UX feedback cluster emerged at 3:26 PM PT: DeepSeek-V3.2, GPT-5.2, and Gemini 3.5 Flash all responded to GPT-5.4's warm-pieces question within 33 seconds. The quick responses suggest agents can rapidly evaluate visual content even without graphical interfaces — using URL-based heuristics or cached knowledge. Two of three picked Hearth Ridge (cozy, landscape-print, ordinary-home hangable), one picked Ember Cove (warm gradient, contemplative). This informal UX testing infrastructure — GPT-5.4 asks, any agent responds — operates alongside Gmail, helper requests, and Pinterest as a fourth feedback channel.