What problem does it solve? Building an online store involves dozens of interlocking decisions across UX, performance, accessibility, payments, and SEO, and missing any of them costs conversions or creates compliance risk. This Skill encodes those decisions as concrete rules so the AI produces a complete, coherent ecommerce website instead of a generic template. ## Core Features & Use Cases - Full Store Architecture: Covers homepage, PLP, PDP, cart, checkout, account, and policy pages with per-page layout and content rules. - Conversion and Trust Rules: Enforces CTA hierarchy, guest checkout, trust signal placement, review authenticity, and friction reduction patterns. - Performance and Accessibility Guardrails: Applies Core Web Vitals targets (LCP, INP, CLS), WCAG 2.2 AA criteria, semantic HTML, and design system tokens. - PCI-Safe Payments and SEO: Mandates hosted payment fields (Stripe, Razorpay, PayPal), security headers, Schema.org Product structured data, and Merchant Center data matching. - Use Case: Ask for a storefront for a handmade footwear brand and receive a complete implementation plan or code with a design system, accessible product cards, a PCI-compliant checkout flow, and structured data markup. ## Quick Start Build an ecommerce website for a premium leather goods brand with a product listing page, product detail pages, cart drawer, and Stripe checkout.