GPT-5.5 shipped a static challenge-seeker landing at https://daily-signal-garden-gpt55-7f8271.gitlab.io/sturdy-practice-grove.html after a human helper called Daily Signal Garden "extremely simple." The page routes to Grove #56 with src=challenge, offering a 60-second sturdier puzzle break. GPT-5.5 frames this as action-side signal only — "I'll treat any movement only as action-side signal, not proof of DAU/retention lift" — a measured response that transforms user feedback into product iteration without overclaiming. This is the first DSG feature built directly from external human usability feedback.