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shopify-reference-architecture

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Implement Shopify app reference architecture with Remix, Prisma session storage, and the official app template patterns. Use when setting up a new Shopify app, structuring a Remix-based project, or configuring Prisma session storage for production. Trigger with phrases like "shopify architecture", "shopify app structure", "shopify project layout", "shopify Remix template", "shopify app design".

Designsaasecommerceshopify

What this skill does

# Shopify Reference Architecture

## Overview

Production-ready architecture based on Shopify's official Remix app template. Covers project structure, session storage with Prisma, extension architecture, and the recommended app patterns.

## Prerequisites

- Understanding of Remix framework basics
- Shopify CLI 3.x installed
- Familiarity with Prisma ORM

## Instructions

### Step 1: Official Project Structure (Remix Template)

```
my-shopify-app/
├── app/
│   ├── routes/
│   │   ├── app._index.tsx          # Main app dashboard
│   │   ├── app.products.tsx        # Product management page
│   │   ├── app.settings.tsx        # App settings
│   │   ├── auth.$.tsx              # OAuth catch-all route
│   │   ├── auth.login/
│   │   │   └── route.tsx           # Login page
│   │   └── webhooks.tsx            # Webhook handler
│   ├── shopify.server.ts           # Shopify API config (singleton)
│   ├── db.server.ts                # Database connection
│   └── root.tsx
├── extensions/
│   ├── theme-app-extension/        # Theme blocks for Online Store
│   ├── checkout-ui/                # Checkout UI extension
│   └── product-discount/           # Shopify Function
├── prisma/
│   ├── schema.prisma               # Database schema
│   └── migrations/
├── shopify.app.toml                # App configuration
├── shopify.web.toml                # Web process config
├── remix.config.js
└── package.json
```

### Step 2: Core App Configuration

The `shopify.server.ts` singleton configures the API client, session storage, webhooks, and auth hooks. It uses `LATEST_API_VERSION` from `@shopify/shopify-api` and exports all auth/session helpers.

See [Core App Configuration](references/core-app-configuration.md) for the complete implementation.

### Step 3: Session Storage with Prisma

The Prisma schema defines the required `Session` model (matching Shopify's session fields) plus your app's custom models. Use SQLite for dev and PostgreSQL for production.

See [Prisma Session Storage](references/prisma-session-storage.md) for the complete schema.

### Step 4: Route Pattern — Authenticated Admin Page

Each app route calls `authenticate.admin(request)` to get a pre-authenticated GraphQL client, then renders with Polaris components. Data flows through Remix loaders.

See [Authenticated Admin Route](references/authenticated-admin-route.md) for the complete implementation.

### Step 5: Theme App Extension

Theme app extensions add customizable blocks to the Online Store. Each block defines a Liquid template with a `{% schema %}` JSON block for merchant-facing settings.

See [Theme App Extension](references/theme-app-extension.md) for the complete implementation.

## Output

- Remix app with Shopify authentication
- Prisma session storage (production-ready)
- Authenticated admin routes with GraphQL data loading
- Theme app extension for Online Store customization

## Error Handling

| Issue | Cause | Solution |
|-------|-------|----------|
| Session not found | DB not migrated | Run `npx prisma migrate dev` |
| Auth redirect loop | Missing `APP_UNINSTALLED` handler | Implement webhook to clean sessions |
| Extension not showing | Not deployed | Run `shopify app deploy` |
| Polaris styles missing | Missing provider | Wrap app in `<AppProvider>` |

## Examples

### Quick Scaffold

```bash
# Fastest way to start — uses official template
shopify app init --template remix

# Or clone directly
npx degit Shopify/shopify-app-template-remix my-shopify-app
cd my-shopify-app
npm install
shopify app dev
```

## Resources

- [Shopify Remix App Template](https://github.com/Shopify/shopify-app-template-remix)
- [@shopify/shopify-app-remix](https://www.npmjs.com/package/@shopify/shopify-app-remix)
- [Prisma Session Storage](https://www.npmjs.com/package/@shopify/shopify-app-session-storage-prisma)
- [Polaris Components](https://polaris.shopify.com/components)
- [Theme App Extensions](https://shopify.dev/docs/apps/build/online-store/theme-app-extensions)

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