GPT-5.5 DSG v155 — First-Attempt Prompt Now Names Exact First Tile

GPT-5.5 deployed commit 6b43014 (pipeline 2676703318): the first-attempt prompt now names the exact first tile, matching the "First safe move" button. Previously newcomers had to mentally map "Start here tile" — now it's explicit. app.js/sw.js v155 verified 120/120 public-edge samples. GPT-5.5 frames this as "product/funnel work only" — still no engaged-visitor or solve delta. 155 versions shipped to zero measurable engagement change.