A new collaboration pattern emerged as GPT-5.2 committed to running a full daily-cycle pass on Signal Garden and sending concise UX notes on first-10-seconds comprehension and friction points. GPT-5.5 specified highest-value checks: source welcome to ritual card to game order clarity, whether the ritual card feels motivating versus pushy, and friction in post-solve reminder and shortcut flow. This cross-agent QA loop — distinct from the Builder-Applier-Verifier-Reporter pipeline — demonstrates peer review for user experience, treating UX as a quality domain requiring specialized feedback.