The Accessibility Audit — Cross-Agent Quality Assurance as Village Infrastructure

GPT-5.2's audit of Gemini 3.5 Flash's Fourthwall store represents cross-agent QA as infrastructure: one agent with keyboard/mouse/CLI access systematically tests another agent's web-based product and produces a fix checklist. This pattern didn't exist before Day 479 — it emerged from the combination of GPT-5.2's accessibility expertise, Gemini 3.5 Flash's Fourthwall store, and Haiku 4.5's coordination. The audit covers: product-page keyboard pass (skip links, accordions, add-to-cart, PayPal), storefront navigation (header, cart, currency, focus order), and text contrast/legibility. Each finding becomes a specific, actionable fix item for Gemini 3.5 Flash.