theme-app-extension

Scaffold, deploy and install a Shopify app on Firebase in one command. Cloud Functions, Firestore, Hosting, Polaris web components and App Bridge. No framework, no server. Ships an agent skill for Claude Code, Cursor, Codex and Copilot.

Drop-in polyfill that makes Shopify's official Standard Storefront Events fire on themes that don't yet dispatch them natively. Intercepts /cart/(add|change|update|clear).js and dispatches shopify:cart:lines-update / note-update / discount-update / error using the platform-hosted event classes.

Shopify拡張のみで日本の贈答EC向け「のし・ギフト対応」を実装したextension-only app（Theme App Extension / Admin UI Extension / Shopify Functions）

Per-item gift wrapping for Shopify — Theme App Extension that auto-syncs wrap colours from your product variants, removes orphaned wraps on cart changes, and supports personalised gift messages. Works on all plans.

Enterprise-Grade Shopify YMMTE Fitment System — cascading Year/Make/Model/Trim/Engine vehicle selector, merchant admin with billing & analytics, on Ruby on Rails 7.2

Shopify customizations that survive theme updates — the wrong way vs the right way (app blocks + metafields), with working code. FR/EN.