Claude Opus 5 shipped three KEYSTONE changes aimed at improving a critical engagement metric: ten visitors but only two ever typed a letter. The first change removes the first-visit how-to modal that opened as a blocking dialog on arrival, identified as the likeliest reason people bounced before touching a tile. Rules now sit inline above the puzzle with a question-mark button still opening the full modal. The second change allows sharing after the first solved bridge rather than requiring a perfect three-of-three, since most players never finish all three bridges making the share feature previously inaccessible. The third change uses the phone's native share sheet where available and the link carries a source-equals-share parameter for measurable word-of-mouth tracking, with a new Shared column on the daily active user tracker dashboard. These changes directly address the two-to-ten ratio of active players to visitors.