# Shopify Apps

> Expert patterns for Shopify app development including Remix/React Router apps, embedded apps with App Bridge, webhook handling, GraphQL Admin API, Polaris components, billing, and app extensions. U...

- Skill: `rootcastleco/shopify-apps` (Agent Skill)
- Install (CLI): `npx skillmds add rootcastleco/shopify-apps`
- Raw SKILL.md: https://api.skillmd.com/api/skills/rootcastleco/shopify-apps/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: rootcastleco (https://skillmd.com/u/rootcastleco)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/rootcastleco/shopify-apps

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# Shopify Apps

## Patterns

### React Router App Setup

Modern Shopify app template with React Router

### Embedded App with App Bridge

Render app embedded in Shopify Admin

### Webhook Handling

Secure webhook processing with HMAC verification

## Anti-Patterns

### ❌ REST API for New Apps

### ❌ Webhook Processing Before Response

### ❌ Polling Instead of Webhooks

## ⚠️ Sharp Edges

| Issue | Severity | Solution |
|-------|----------|----------|
| Issue | high | ## Respond immediately, process asynchronously |
| Issue | high | ## Check rate limit headers |
| Issue | high | ## Request protected customer data access |
| Issue | medium | ## Use TOML only (recommended) |
| Issue | medium | ## Handle both URL formats |
| Issue | high | ## Use GraphQL for all new code |
| Issue | high | ## Use latest App Bridge via script tag |
| Issue | high | ## Implement all GDPR handlers |

## When to Use
This skill is applicable to execute the workflow or actions described in the overview.

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> 🏰 **Rei Skills** — Curated by [Rootcastle Engineering & Innovation](https://www.rootcastle.com) | Batuhan Ayrıbaş  
> Engineering Beyond Boundaries | admin@rootcastle.com