Shopify App Development Overview Build Shopify apps using the Shopify CLI 3.x Remix template, which handles OAuth token exchange, session storage, and App Bridge initialization automatically. Embedded apps run inside the Shopify Admin iframe and use Polaris for a native-feeling UI. The modern approach uses the Remix-based package rather than the legacy Express template. When to Use This Skill - When building a public or custom Shopify app that extends Admin functionality - When creating an embedded app that merchants install from the Shopify App Store - When implementing OAuth for the first t…