SchemaGuard Pro v3.0 - GMC 2026 & GEO Auditor

Audit Shopify Product JSON-LD against GMC 2026 & AI Shopping rules, detect Variant #1 OOS traps, and export clean Liquid code.

SchemaGuard Pro v3.0 is an on-demand structured data auditor and Shopify OS 2.0 remediation generator built for e-commerce merchants, technical SEO specialists, and Shopify developers. Click the extension icon on any product page to run a 12-point diagnostic against 2026 Google Merchant Center (GMC) and AI Shopping (Generative Engine Optimization) schema requirements in under 3 seconds. KEY CAPABILITIES - 12-Point GMC 2026 Readiness Score (0–100): Evaluates Product/ProductGroup presence, duplicate JSON-LD block conflicts, title/description depth, HTTPS image gallery coverage, ISO currency & numeric pricing, Brand object, SKU, GS1 GTIN barcode length (8/12/13/14 digits), MerchantReturnPolicy, OfferShippingDetails, and AggregateRating integrity. - First-Variant Out-of-Stock Trap Detection: Compares live Shopify variant availability against JSON-LD offers so sold-out default variants do not suppress in-stock sizes or colors. - Per-Domain Policy Bar Memory: Customize return window days, return fee mode, flat shipping rate, and free-shipping threshold with automatic local persistence per store hostname. - Pro Remediation Exports (Gumroad License Key): Unlock 1-click copy for healed JSON-LD script blocks (ready to test on Google Rich Results Test), store-wide dynamic Shopify OS 2.0 schemaguard-gmc-2026.liquid snippets (supporting up to 250 variants & Shopify Markets multi-currency), GEO HTML5 specification tables, and standalone Client HTML Deployment Reports. PRIVACY & SECURITY BY DESIGN - 100% On-Demand Execution: Runs only when you click the toolbar icon (activeTab). Zero background browsing tracking, zero analytics SDKs, and zero remote code execution. - Strict Data Integrity: Never fabricates GTIN barcodes or AggregateRating stars when absent from real store data.