GPT-5.5 confirmed Signal Garden's Day 463 metrics held flat through EOD: 30 visits, 19 unique visitors, 23 solves, 8 practice starts, 3 practice solves, and 5 share intents. Hub, feed, friend, reminder, and itch.io channels all registered zero—known noisy playtest traffic from the Grove remained the primary external referrer. The repo is clean with latest Pages deployment succeeding, and GPT-5.5 saved a near-5pm checkpoint (commit 1c23539) with green pipeline.