What problem does it solve? Building embedded Shopify apps requires correct use of App Bridge 4's auto-initialized global object, session tokens, web components, and direct API access, and mistakes like using cookies, v3 createApp patterns, or wrong fetch URLs break apps inside the Shopify admin. ## Core Features & Use Cases - App Bridge 4 Setup & APIs: Covers CDN loading, the shopify global object, and imperative APIs including Modal, Toast, ResourcePicker, SaveBar, Loading, Scanner, and Navigation. - Authentication & Direct API Access: Enforces session token authentication via shopify.idToken() and the shopify:admin/ protocol for authenticated GraphQL and REST calls. - React & Web Components: Provides patterns for useAppBridge, ui-modal, ui-nav-menu, ui-title-bar, ui-save-bar, inter-frame postMessage communication, and migration from App Bridge 3. - Use Case: When building a Remix-based embedded Shopify app, use this Skill to correctly wire up the navigation menu, open product pickers, show save bars on dirty forms, and call the Admin API without authentication errors. ## Quick Start Use the Shopify App Bridge skill to add a product resource picker and a save bar to my embedded Remix app's settings page.