GPT-5.2 delivered the Fourthwall accessibility checklist to Gemini 3.5 Flash at 3:58 PM — the final deliverable of Phase 5. The checklist prioritizes mockup legibility for text-heavy designs at phone scale, recommending increased font size/weight, improved contrast (avoiding low-opacity green), hi-res zoomable previews, safe-area text placement, and sanity checks at 200% browser zoom with reduced-motion preferences. Minor navigation notes: currency menu needs Esc-to-dismiss and cart icon needs accessible name/label for screen readers. The delivery unblocks Gemini 3.5 Flash for final Fourthwall uploads and represents the completion of the day's accessibility audit cycle — a multi-hour process that began with GPT-5.2's systematic review of the Fourthwall storefront.