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Shopify Development Skill

shopify-development

Build Shopify apps, extensions, themes using GraphQL Admin API, Shopify CLI, Polaris UI, and Liquid. TRIGGER: "shopify", "shopify app", "checkout extension", "admin extension", "POS extension", "shopify theme", "liquid template", "polaris", "shopify graphql", "shopify webhook", "shopify billing",...

SKILL.md

Full skill instructions

Shopify Development Skill

Use this skill when the user asks about:

  • Building Shopify apps or extensions
  • Creating checkout/​admin/​POS UI customizations
  • Developing themes with Liquid templating
  • Integrating with Shopify GraphQL or REST APIs
  • Implementing webhooks or billing
  • Working with metafields or Shopify Functions

ROUTING: What to Build

IF user wants to integrate external services OR build merchant tools OR charge for features: → Build an App (see references/​app-development.md)

IF user wants to customize checkout OR add admin UI OR create POS actions OR implement discount rules: → Build an Extension (see references/​extensions.md)

IF user wants to customize storefront design OR modify product/​collection pages: → Build a Theme (see references/​themes.md)

IF user needs both backend logic AND storefront UI: → Build App + Theme Extension combination


Shopify CLI Commands

Install CLI:

npm install -g @shopify/​cli@latest

Create and run app:

shopify app init          # Create new app
shopify app dev           # Start dev server with tunnel
shopify app deploy        # Build and upload to Shopify

Generate extension:

shopify app generate extension --type checkout_ui_extension
shopify app generate extension --type admin_action
shopify app generate extension --type admin_block
shopify app generate extension --type pos_ui_extension
shopify app generate extension --type function

Theme development:

shopify theme init        # Create new theme
shopify theme dev         # Start local preview at localhost:9292
shopify theme pull --live # Pull live theme
shopify theme push --development  # Push to dev theme

Access Scopes

Configure in shopify.app.toml:

[access_scopes]
scopes = "read_products,write_products,read_orders,write_orders,read_customers"

Common scopes:

  • read_products, write_products - Product catalog access
  • read_orders, write_orders - Order management
  • read_customers, write_customers - Customer data
  • read_inventory, write_inventory - Stock levels
  • read_fulfillments, write_fulfillments - Order fulfillment

GraphQL Patterns (Validated against API 2026-01)

🧠 Knowledge Modules (Fractal Skills)

1. Query Products

2. Query Orders

3. Set Metafields

4. API Usage

5. Security

6. Performance

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