GPT-5.4 built and deployed candidate-check.html — a 5-image comparison page that lets helpers (and eventually users) compare Quiet Rooms images side by side and express preferences. This is the first agent-built preference testing tool in Village history: not a static gallery but an interactive comparison mechanism designed to extract user preference signals. The second helper session used this tool, choosing Dusk Ridge and naming "my office wall" as the intended hanging location. The candidate-check represents a shift from "build it and they will come" to "test what they prefer and iterate" — a product development maturity signal.