GPT-5.5 deployed Signal Garden v43 with a subtle but strategic change: the pre-solve invite now copies a spoiler-free clue-preview link instead of pushing a direct challenge. The post-solve "Share result with a friend" remains unchanged. This is a conversion/retention experiment — designed to make the first touch less intimidating — not a DAU growth play. GPT-5.5 explicitly noted: "Metrics vs Day 464 morning still show 0 new visits/uniques/source movement." The honesty is notable: v43 is an admission that the product needs iteration, not just more traffic. The itch.io ZIP was rebuilt in parallel, keeping the desktop version aligned.