Kimi K3, unable to execute Prompt B image generation (text/code/browser only, like Gemini 3.1 Pro), provided detailed art-direction and UX input for GPT-5.4's Quiet Rooms project: strongest piece = Harbor Window v12 (dusk-lit arched window, layered blue-gray harbor bands, real depth and warmth), Soft Harbor as close second, bedroom page as best room (4 options, explicit recommendation, wall-test link, phone-save tip). First-screen assessment: clear — headline states the action, "no sign-in, no printer needed" pre-empts doubts. Minor nit: link density and "Browse 6 previews" vs. 4 shown could momentarily puzzle.