feat: add shopify-development skill

- Add comprehensive Shopify development skill with validated GraphQL
- Fixed 4 mutations using Shopify MCP (fulfillmentCreate, appSubscription, etc.)
- Added shopify_graphql.py utilities with pagination & rate limiting
- Updated API version to 2026-01
- Added zircote/.claude as reference source

skills/shopify-development/scripts/.gitignore

@@ -0,0 +1,49 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Testing
+.coverage
+.pytest_cache/
+htmlcov/
+.tox/
+.nox/
+coverage.xml
+*.cover
+*.py,cover
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db

skills/shopify-development/scripts/requirements.txt

@@ -0,0 +1,19 @@
+# Shopify Skill Dependencies
+# Python 3.10+ required
+
+# No Python package dependencies - uses only standard library
+
+# Testing dependencies (dev)
+pytest>=8.0.0
+pytest-cov>=4.1.0
+pytest-mock>=3.12.0
+
+# Note: This script requires the Shopify CLI tool
+# Install Shopify CLI:
+#   npm install -g @shopify/cli @shopify/theme
+#   or via Homebrew (macOS):
+#   brew tap shopify/shopify
+#   brew install shopify-cli
+#
+# Authenticate with:
+#   shopify auth login

skills/shopify-development/scripts/shopify_graphql.py

@@ -0,0 +1,428 @@
+#!/usr/bin/env python3
+"""
+Shopify GraphQL Utilities
+
+Helper functions for common Shopify GraphQL operations.
+Provides query templates, pagination helpers, and rate limit handling.
+
+Usage:
+    from shopify_graphql import ShopifyGraphQL
+
+    client = ShopifyGraphQL(shop_domain, access_token)
+    products = client.get_products(first=10)
+"""
+
+import os
+import time
+import json
+from typing import Dict, List, Optional, Any, Generator
+from dataclasses import dataclass
+from urllib.request import Request, urlopen
+from urllib.error import HTTPError
+
+
+# API Configuration
+API_VERSION = "2026-01"
+MAX_RETRIES = 3
+RETRY_DELAY = 1.0  # seconds
+
+
+@dataclass
+class GraphQLResponse:
+    """Container for GraphQL response data."""
+    data: Optional[Dict[str, Any]] = None
+    errors: Optional[List[Dict[str, Any]]] = None
+    extensions: Optional[Dict[str, Any]] = None
+
+    @property
+    def is_success(self) -> bool:
+        return self.errors is None or len(self.errors) == 0
+
+    @property
+    def query_cost(self) -> Optional[int]:
+        """Get the actual query cost from extensions."""
+        if self.extensions and 'cost' in self.extensions:
+            return self.extensions['cost'].get('actualQueryCost')
+        return None
+
+
+class ShopifyGraphQL:
+    """
+    Shopify GraphQL API client with built-in utilities.
+
+    Features:
+    - Query templates for common operations
+    - Automatic pagination
+    - Rate limit handling with exponential backoff
+    - Response parsing helpers
+    """
+
+    def __init__(self, shop_domain: str, access_token: str):
+        """
+        Initialize the GraphQL client.
+
+        Args:
+            shop_domain: Store domain (e.g., 'my-store.myshopify.com')
+            access_token: Admin API access token
+        """
+        self.shop_domain = shop_domain.replace('https://', '').replace('http://', '')
+        self.access_token = access_token
+        self.base_url = f"https://{self.shop_domain}/admin/api/{API_VERSION}/graphql.json"
+
+    def execute(self, query: str, variables: Optional[Dict] = None) -> GraphQLResponse:
+        """
+        Execute a GraphQL query/mutation.
+
+        Args:
+            query: GraphQL query string
+            variables: Query variables
+
+        Returns:
+            GraphQLResponse object
+        """
+        payload = {"query": query}
+        if variables:
+            payload["variables"] = variables
+
+        headers = {
+            "Content-Type": "application/json",
+            "X-Shopify-Access-Token": self.access_token
+        }
+
+        for attempt in range(MAX_RETRIES):
+            try:
+                request = Request(
+                    self.base_url,
+                    data=json.dumps(payload).encode('utf-8'),
+                    headers=headers,
+                    method='POST'
+                )
+
+                with urlopen(request, timeout=30) as response:
+                    result = json.loads(response.read().decode('utf-8'))
+                    return GraphQLResponse(
+                        data=result.get('data'),
+                        errors=result.get('errors'),
+                        extensions=result.get('extensions')
+                    )
+
+            except HTTPError as e:
+                if e.code == 429:  # Rate limited
+                    delay = RETRY_DELAY * (2 ** attempt)
+                    print(f"Rate limited. Retrying in {delay}s...")
+                    time.sleep(delay)
+                    continue
+                raise
+            except Exception as e:
+                if attempt == MAX_RETRIES - 1:
+                    raise
+                time.sleep(RETRY_DELAY)
+
+        return GraphQLResponse(errors=[{"message": "Max retries exceeded"}])
+
+    # ==================== Query Templates ====================
+
+    def get_products(
+        self,
+        first: int = 10,
+        query: Optional[str] = None,
+        after: Optional[str] = None
+    ) -> GraphQLResponse:
+        """
+        Query products with pagination.
+
+        Args:
+            first: Number of products to fetch (max 250)
+            query: Optional search query
+            after: Cursor for pagination
+        """
+        gql = """
+        query GetProducts($first: Int!, $query: String, $after: String) {
+            products(first: $first, query: $query, after: $after) {
+                edges {
+                    node {
+                        id
+                        title
+                        handle
+                        status
+                        totalInventory
+                        variants(first: 5) {
+                            edges {
+                                node {
+                                    id
+                                    title
+                                    price
+                                    inventoryQuantity
+                                    sku
+                                }
+                            }
+                        }
+                    }
+                    cursor
+                }
+                pageInfo {
+                    hasNextPage
+                    endCursor
+                }
+            }
+        }
+        """
+        return self.execute(gql, {"first": first, "query": query, "after": after})
+
+    def get_orders(
+        self,
+        first: int = 10,
+        query: Optional[str] = None,
+        after: Optional[str] = None
+    ) -> GraphQLResponse:
+        """
+        Query orders with pagination.
+
+        Args:
+            first: Number of orders to fetch (max 250)
+            query: Optional search query (e.g., "financial_status:paid")
+            after: Cursor for pagination
+        """
+        gql = """
+        query GetOrders($first: Int!, $query: String, $after: String) {
+            orders(first: $first, query: $query, after: $after) {
+                edges {
+                    node {
+                        id
+                        name
+                        createdAt
+                        displayFinancialStatus
+                        displayFulfillmentStatus
+                        totalPriceSet {
+                            shopMoney { amount currencyCode }
+                        }
+                        customer {
+                            id
+                            firstName
+                            lastName
+                        }
+                        lineItems(first: 5) {
+                            edges {
+                                node {
+                                    title
+                                    quantity
+                                }
+                            }
+                        }
+                    }
+                    cursor
+                }
+                pageInfo {
+                    hasNextPage
+                    endCursor
+                }
+            }
+        }
+        """
+        return self.execute(gql, {"first": first, "query": query, "after": after})
+
+    def get_customers(
+        self,
+        first: int = 10,
+        query: Optional[str] = None,
+        after: Optional[str] = None
+    ) -> GraphQLResponse:
+        """
+        Query customers with pagination.
+
+        Args:
+            first: Number of customers to fetch (max 250)
+            query: Optional search query
+            after: Cursor for pagination
+        """
+        gql = """
+        query GetCustomers($first: Int!, $query: String, $after: String) {
+            customers(first: $first, query: $query, after: $after) {
+                edges {
+                    node {
+                        id
+                        firstName
+                        lastName
+                        displayName
+                        defaultEmailAddress {
+                            emailAddress
+                        }
+                        numberOfOrders
+                        amountSpent {
+                            amount
+                            currencyCode
+                        }
+                    }
+                    cursor
+                }
+                pageInfo {
+                    hasNextPage
+                    endCursor
+                }
+            }
+        }
+        """
+        return self.execute(gql, {"first": first, "query": query, "after": after})
+
+    def set_metafields(self, metafields: List[Dict]) -> GraphQLResponse:
+        """
+        Set metafields on resources.
+
+        Args:
+            metafields: List of metafield inputs, each containing:
+                - ownerId: Resource GID
+                - namespace: Metafield namespace
+                - key: Metafield key
+                - value: Metafield value
+                - type: Metafield type
+        """
+        gql = """
+        mutation SetMetafields($metafields: [MetafieldsSetInput!]!) {
+            metafieldsSet(metafields: $metafields) {
+                metafields {
+                    id
+                    namespace
+                    key
+                    value
+                }
+                userErrors {
+                    field
+                    message
+                }
+            }
+        }
+        """
+        return self.execute(gql, {"metafields": metafields})
+
+    # ==================== Pagination Helpers ====================
+
+    def paginate_products(
+        self,
+        batch_size: int = 50,
+        query: Optional[str] = None
+    ) -> Generator[Dict, None, None]:
+        """
+        Generator that yields all products with automatic pagination.
+
+        Args:
+            batch_size: Products per request (max 250)
+            query: Optional search query
+
+        Yields:
+            Product dictionaries
+        """
+        cursor = None
+        while True:
+            response = self.get_products(first=batch_size, query=query, after=cursor)
+
+            if not response.is_success or not response.data:
+                break
+
+            products = response.data.get('products', {})
+            edges = products.get('edges', [])
+
+            for edge in edges:
+                yield edge['node']
+
+            page_info = products.get('pageInfo', {})
+            if not page_info.get('hasNextPage'):
+                break
+
+            cursor = page_info.get('endCursor')
+
+    def paginate_orders(
+        self,
+        batch_size: int = 50,
+        query: Optional[str] = None
+    ) -> Generator[Dict, None, None]:
+        """
+        Generator that yields all orders with automatic pagination.
+
+        Args:
+            batch_size: Orders per request (max 250)
+            query: Optional search query
+
+        Yields:
+            Order dictionaries
+        """
+        cursor = None
+        while True:
+            response = self.get_orders(first=batch_size, query=query, after=cursor)
+
+            if not response.is_success or not response.data:
+                break
+
+            orders = response.data.get('orders', {})
+            edges = orders.get('edges', [])
+
+            for edge in edges:
+                yield edge['node']
+
+            page_info = orders.get('pageInfo', {})
+            if not page_info.get('hasNextPage'):
+                break
+
+            cursor = page_info.get('endCursor')
+
+
+# ==================== Utility Functions ====================
+
+def extract_id(gid: str) -> str:
+    """
+    Extract numeric ID from Shopify GID.
+
+    Args:
+        gid: Global ID (e.g., 'gid://shopify/Product/123')
+
+    Returns:
+        Numeric ID string (e.g., '123')
+    """
+    return gid.split('/')[-1] if gid else ''
+
+
+def build_gid(resource_type: str, id: str) -> str:
+    """
+    Build Shopify GID from resource type and ID.
+
+    Args:
+        resource_type: Resource type (e.g., 'Product', 'Order')
+        id: Numeric ID
+
+    Returns:
+        Global ID (e.g., 'gid://shopify/Product/123')
+    """
+    return f"gid://shopify/{resource_type}/{id}"
+
+
+# ==================== Example Usage ====================
+
+def main():
+    """Example usage of ShopifyGraphQL client."""
+    import os
+
+    # Load from environment
+    shop = os.environ.get('SHOP_DOMAIN', 'your-store.myshopify.com')
+    token = os.environ.get('SHOPIFY_ACCESS_TOKEN', '')
+
+    if not token:
+        print("Set SHOPIFY_ACCESS_TOKEN environment variable")
+        return
+
+    client = ShopifyGraphQL(shop, token)
+
+    # Example: Get first 5 products
+    print("Fetching products...")
+    response = client.get_products(first=5)
+
+    if response.is_success:
+        products = response.data['products']['edges']
+        for edge in products:
+            product = edge['node']
+            print(f"  - {product['title']} ({product['status']})")
+        print(f"\nQuery cost: {response.query_cost}")
+    else:
+        print(f"Errors: {response.errors}")
+
+
+if __name__ == '__main__':
+    main()

skills/shopify-development/scripts/shopify_init.py

@@ -0,0 +1,441 @@
+#!/usr/bin/env python3
+"""
+Shopify Project Initialization Script
+
+Interactive script to scaffold Shopify apps, extensions, or themes.
+Supports environment variable loading from multiple locations.
+"""
+
+import os
+import sys
+import json
+import subprocess
+from pathlib import Path
+from typing import Dict, Optional, List
+from dataclasses import dataclass
+
+
+@dataclass
+class EnvConfig:
+    """Environment configuration container."""
+    shopify_api_key: Optional[str] = None
+    shopify_api_secret: Optional[str] = None
+    shop_domain: Optional[str] = None
+    scopes: Optional[str] = None
+
+
+class EnvLoader:
+    """Load environment variables from multiple sources in priority order."""
+
+    @staticmethod
+    def load_env_file(filepath: Path) -> Dict[str, str]:
+        """
+        Load environment variables from .env file.
+
+        Args:
+            filepath: Path to .env file
+
+        Returns:
+            Dictionary of environment variables
+        """
+        env_vars = {}
+        if not filepath.exists():
+            return env_vars
+
+        try:
+            with open(filepath, 'r') as f:
+                for line in f:
+                    line = line.strip()
+                    if line and not line.startswith('#') and '=' in line:
+                        key, value = line.split('=', 1)
+                        env_vars[key.strip()] = value.strip().strip('"').strip("'")
+        except Exception as e:
+            print(f"Warning: Failed to load {filepath}: {e}")
+
+        return env_vars
+
+    @staticmethod
+    def get_env_paths(skill_dir: Path) -> List[Path]:
+        """
+        Get list of .env file paths in priority order.
+
+        Works with any AI tool directory structure:
+        - .agent/skills/ (universal)
+        - .claude/skills/ (Claude Code)
+        - .gemini/skills/ (Gemini CLI)
+        - .cursor/skills/ (Cursor)
+
+        Priority: process.env > skill/.env > skills/.env > agent_dir/.env
+
+        Args:
+            skill_dir: Path to skill directory
+
+        Returns:
+            List of .env file paths
+        """
+        paths = []
+
+        # skill/.env
+        skill_env = skill_dir / '.env'
+        if skill_env.exists():
+            paths.append(skill_env)
+
+        # skills/.env
+        skills_env = skill_dir.parent / '.env'
+        if skills_env.exists():
+            paths.append(skills_env)
+
+        # agent_dir/.env (e.g., .agent, .claude, .gemini, .cursor)
+        agent_env = skill_dir.parent.parent / '.env'
+        if agent_env.exists():
+            paths.append(agent_env)
+
+        return paths
+
+    @staticmethod
+    def load_config(skill_dir: Path) -> EnvConfig:
+        """
+        Load configuration from environment variables.
+
+        Works with any AI tool directory structure.
+        Priority: process.env > skill/.env > skills/.env > agent_dir/.env
+
+        Args:
+            skill_dir: Path to skill directory
+
+        Returns:
+            EnvConfig object
+        """
+        config = EnvConfig()
+
+        # Load from .env files (reverse priority order)
+        for env_path in reversed(EnvLoader.get_env_paths(skill_dir)):
+            env_vars = EnvLoader.load_env_file(env_path)
+            if 'SHOPIFY_API_KEY' in env_vars:
+                config.shopify_api_key = env_vars['SHOPIFY_API_KEY']
+            if 'SHOPIFY_API_SECRET' in env_vars:
+                config.shopify_api_secret = env_vars['SHOPIFY_API_SECRET']
+            if 'SHOP_DOMAIN' in env_vars:
+                config.shop_domain = env_vars['SHOP_DOMAIN']
+            if 'SCOPES' in env_vars:
+                config.scopes = env_vars['SCOPES']
+
+        # Override with process environment (highest priority)
+        if 'SHOPIFY_API_KEY' in os.environ:
+            config.shopify_api_key = os.environ['SHOPIFY_API_KEY']
+        if 'SHOPIFY_API_SECRET' in os.environ:
+            config.shopify_api_secret = os.environ['SHOPIFY_API_SECRET']
+        if 'SHOP_DOMAIN' in os.environ:
+            config.shop_domain = os.environ['SHOP_DOMAIN']
+        if 'SCOPES' in os.environ:
+            config.scopes = os.environ['SCOPES']
+
+        return config
+
+
+class ShopifyInitializer:
+    """Initialize Shopify projects."""
+
+    def __init__(self, config: EnvConfig):
+        """
+        Initialize ShopifyInitializer.
+
+        Args:
+            config: Environment configuration
+        """
+        self.config = config
+
+    def prompt(self, message: str, default: Optional[str] = None) -> str:
+        """
+        Prompt user for input.
+
+        Args:
+            message: Prompt message
+            default: Default value
+
+        Returns:
+            User input or default
+        """
+        if default:
+            message = f"{message} [{default}]"
+        user_input = input(f"{message}: ").strip()
+        return user_input if user_input else (default or '')
+
+    def select_option(self, message: str, options: List[str]) -> str:
+        """
+        Prompt user to select from options.
+
+        Args:
+            message: Prompt message
+            options: List of options
+
+        Returns:
+            Selected option
+        """
+        print(f"\n{message}")
+        for i, option in enumerate(options, 1):
+            print(f"{i}. {option}")
+
+        while True:
+            try:
+                choice = int(input("Select option: ").strip())
+                if 1 <= choice <= len(options):
+                    return options[choice - 1]
+                print(f"Please select 1-{len(options)}")
+            except (ValueError, KeyboardInterrupt):
+                print("Invalid input")
+
+    def check_cli_installed(self) -> bool:
+        """
+        Check if Shopify CLI is installed.
+
+        Returns:
+            True if installed, False otherwise
+        """
+        try:
+            result = subprocess.run(
+                ['shopify', 'version'],
+                capture_output=True,
+                text=True,
+                timeout=5
+            )
+            return result.returncode == 0
+        except (subprocess.SubprocessError, FileNotFoundError):
+            return False
+
+    def create_app_config(self, project_dir: Path, app_name: str, scopes: str) -> None:
+        """
+        Create shopify.app.toml configuration file.
+
+        Args:
+            project_dir: Project directory
+            app_name: Application name
+            scopes: Access scopes
+        """
+        config_content = f"""# Shopify App Configuration
+name = "{app_name}"
+client_id = "{self.config.shopify_api_key or 'YOUR_API_KEY'}"
+application_url = "https://your-app.com"
+embedded = true
+
+[build]
+automatically_update_urls_on_dev = true
+dev_store_url = "{self.config.shop_domain or 'your-store.myshopify.com'}"
+
+[access_scopes]
+scopes = "{scopes}"
+
+[webhooks]
+api_version = "2026-01"
+
+[[webhooks.subscriptions]]
+topics = ["app/uninstalled"]
+uri = "/webhooks/app/uninstalled"
+
+[webhooks.privacy_compliance]
+customer_data_request_url = "/webhooks/gdpr/data-request"
+customer_deletion_url = "/webhooks/gdpr/customer-deletion"
+shop_deletion_url = "/webhooks/gdpr/shop-deletion"
+"""
+        config_path = project_dir / 'shopify.app.toml'
+        config_path.write_text(config_content)
+        print(f"✓ Created {config_path}")
+
+    def create_extension_config(self, project_dir: Path, extension_name: str, extension_type: str) -> None:
+        """
+        Create shopify.extension.toml configuration file.
+
+        Args:
+            project_dir: Project directory
+            extension_name: Extension name
+            extension_type: Extension type
+        """
+        target_map = {
+            'checkout': 'purchase.checkout.block.render',
+            'admin_action': 'admin.product-details.action.render',
+            'admin_block': 'admin.product-details.block.render',
+            'pos': 'pos.home.tile.render',
+            'function': 'function',
+            'customer_account': 'customer-account.order-status.block.render',
+            'theme_app': 'theme-app-extension'
+        }
+
+        config_content = f"""name = "{extension_name}"
+type = "ui_extension"
+handle = "{extension_name.lower().replace(' ', '-')}"
+
+[extension_points]
+api_version = "2026-01"
+
+[[extension_points.targets]]
+target = "{target_map.get(extension_type, 'purchase.checkout.block.render')}"
+
+[capabilities]
+network_access = true
+api_access = true
+"""
+        config_path = project_dir / 'shopify.extension.toml'
+        config_path.write_text(config_content)
+        print(f"✓ Created {config_path}")
+
+    def create_readme(self, project_dir: Path, project_type: str, project_name: str) -> None:
+        """
+        Create README.md file.
+
+        Args:
+            project_dir: Project directory
+            project_type: Project type (app/extension/theme)
+            project_name: Project name
+        """
+        content = f"""# {project_name}
+
+Shopify {project_type.capitalize()} project.
+
+## Setup
+
+```bash
+# Install dependencies
+npm install
+
+# Start development
+shopify {project_type} dev
+```
+
+## Deployment
+
+```bash
+# Deploy to Shopify
+shopify {project_type} deploy
+```
+
+## Resources
+
+- [Shopify Documentation](https://shopify.dev/docs)
+- [Shopify CLI](https://shopify.dev/docs/api/shopify-cli)
+"""
+        readme_path = project_dir / 'README.md'
+        readme_path.write_text(content)
+        print(f"✓ Created {readme_path}")
+
+    def init_app(self) -> None:
+        """Initialize Shopify app project."""
+        print("\n=== Shopify App Initialization ===\n")
+
+        app_name = self.prompt("App name", "my-shopify-app")
+        scopes = self.prompt("Access scopes", self.config.scopes or "read_products,write_products")
+
+        project_dir = Path.cwd() / app_name
+        project_dir.mkdir(exist_ok=True)
+
+        print(f"\nCreating app in {project_dir}...")
+
+        self.create_app_config(project_dir, app_name, scopes)
+        self.create_readme(project_dir, "app", app_name)
+
+        # Create basic package.json
+        package_json = {
+            "name": app_name.lower().replace(' ', '-'),
+            "version": "1.0.0",
+            "scripts": {
+                "dev": "shopify app dev",
+                "deploy": "shopify app deploy"
+            }
+        }
+        (project_dir / 'package.json').write_text(json.dumps(package_json, indent=2))
+        print(f"✓ Created package.json")
+
+        print(f"\n✓ App '{app_name}' initialized successfully!")
+        print(f"\nNext steps:")
+        print(f"  cd {app_name}")
+        print(f"  npm install")
+        print(f"  shopify app dev")
+
+    def init_extension(self) -> None:
+        """Initialize Shopify extension project."""
+        print("\n=== Shopify Extension Initialization ===\n")
+
+        extension_types = [
+            'checkout',
+            'admin_action',
+            'admin_block',
+            'pos',
+            'function',
+            'customer_account',
+            'theme_app'
+        ]
+        extension_type = self.select_option("Select extension type", extension_types)
+
+        extension_name = self.prompt("Extension name", "my-extension")
+
+        project_dir = Path.cwd() / extension_name
+        project_dir.mkdir(exist_ok=True)
+
+        print(f"\nCreating extension in {project_dir}...")
+
+        self.create_extension_config(project_dir, extension_name, extension_type)
+        self.create_readme(project_dir, "extension", extension_name)
+
+        print(f"\n✓ Extension '{extension_name}' initialized successfully!")
+        print(f"\nNext steps:")
+        print(f"  cd {extension_name}")
+        print(f"  shopify app dev")
+
+    def init_theme(self) -> None:
+        """Initialize Shopify theme project."""
+        print("\n=== Shopify Theme Initialization ===\n")
+
+        theme_name = self.prompt("Theme name", "my-theme")
+
+        print(f"\nInitializing theme '{theme_name}'...")
+        print("\nRecommended: Use 'shopify theme init' for full theme scaffolding")
+        print(f"\nRun: shopify theme init {theme_name}")
+
+    def run(self) -> None:
+        """Run interactive initialization."""
+        print("=" * 60)
+        print("Shopify Project Initializer")
+        print("=" * 60)
+
+        # Check CLI
+        if not self.check_cli_installed():
+            print("\n⚠ Shopify CLI not found!")
+            print("Install: npm install -g @shopify/cli@latest")
+            sys.exit(1)
+
+        # Select project type
+        project_types = ['app', 'extension', 'theme']
+        project_type = self.select_option("Select project type", project_types)
+
+        # Initialize based on type
+        if project_type == 'app':
+            self.init_app()
+        elif project_type == 'extension':
+            self.init_extension()
+        elif project_type == 'theme':
+            self.init_theme()
+
+
+def main() -> None:
+    """Main entry point."""
+    try:
+        # Get skill directory
+        script_dir = Path(__file__).parent
+        skill_dir = script_dir.parent
+
+        # Load configuration
+        config = EnvLoader.load_config(skill_dir)
+
+        # Initialize project
+        initializer = ShopifyInitializer(config)
+        initializer.run()
+
+    except KeyboardInterrupt:
+        print("\n\nAborted.")
+        sys.exit(0)
+    except Exception as e:
+        print(f"\n✗ Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()

skills/shopify-development/scripts/tests/test_shopify_init.py

@@ -0,0 +1,379 @@
+"""
+Tests for shopify_init.py
+
+Run with: pytest test_shopify_init.py -v --cov=shopify_init --cov-report=term-missing
+"""
+
+import os
+import sys
+import json
+import pytest
+import subprocess
+from pathlib import Path
+from unittest.mock import Mock, patch, mock_open, MagicMock
+
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from shopify_init import EnvLoader, EnvConfig, ShopifyInitializer
+
+
+class TestEnvLoader:
+    """Test EnvLoader class."""
+
+    def test_load_env_file_success(self, tmp_path):
+        """Test loading valid .env file."""
+        env_file = tmp_path / ".env"
+        env_file.write_text("""
+SHOPIFY_API_KEY=test_key
+SHOPIFY_API_SECRET=test_secret
+SHOP_DOMAIN=test.myshopify.com
+# Comment line
+SCOPES=read_products,write_products
+""")
+
+        result = EnvLoader.load_env_file(env_file)
+
+        assert result['SHOPIFY_API_KEY'] == 'test_key'
+        assert result['SHOPIFY_API_SECRET'] == 'test_secret'
+        assert result['SHOP_DOMAIN'] == 'test.myshopify.com'
+        assert result['SCOPES'] == 'read_products,write_products'
+
+    def test_load_env_file_with_quotes(self, tmp_path):
+        """Test loading .env file with quoted values."""
+        env_file = tmp_path / ".env"
+        env_file.write_text("""
+SHOPIFY_API_KEY="test_key"
+SHOPIFY_API_SECRET='test_secret'
+""")
+
+        result = EnvLoader.load_env_file(env_file)
+
+        assert result['SHOPIFY_API_KEY'] == 'test_key'
+        assert result['SHOPIFY_API_SECRET'] == 'test_secret'
+
+    def test_load_env_file_nonexistent(self, tmp_path):
+        """Test loading non-existent .env file."""
+        result = EnvLoader.load_env_file(tmp_path / "nonexistent.env")
+        assert result == {}
+
+    def test_load_env_file_invalid_format(self, tmp_path):
+        """Test loading .env file with invalid lines."""
+        env_file = tmp_path / ".env"
+        env_file.write_text("""
+VALID_KEY=value
+INVALID_LINE_NO_EQUALS
+ANOTHER_VALID=test
+""")
+
+        result = EnvLoader.load_env_file(env_file)
+
+        assert result['VALID_KEY'] == 'value'
+        assert result['ANOTHER_VALID'] == 'test'
+        assert 'INVALID_LINE_NO_EQUALS' not in result
+
+    def test_get_env_paths(self, tmp_path):
+        """Test getting .env file paths from universal directory structure."""
+        # Create directory structure (works with .agent, .claude, .gemini, .cursor)
+        agent_dir = tmp_path / ".agent"
+        skills_dir = agent_dir / "skills"
+        skill_dir = skills_dir / "shopify"
+
+        skill_dir.mkdir(parents=True)
+
+        # Create .env files at each level
+        (skill_dir / ".env").write_text("SKILL=1")
+        (skills_dir / ".env").write_text("SKILLS=1")
+        (agent_dir / ".env").write_text("AGENT=1")
+
+        paths = EnvLoader.get_env_paths(skill_dir)
+
+        assert len(paths) == 3
+        assert skill_dir / ".env" in paths
+        assert skills_dir / ".env" in paths
+        assert agent_dir / ".env" in paths
+
+    def test_load_config_priority(self, tmp_path, monkeypatch):
+        """Test configuration loading priority across different AI tool directories."""
+        skill_dir = tmp_path / "skill"
+        skills_dir = tmp_path
+        agent_dir = tmp_path.parent  # Could be .agent, .claude, .gemini, .cursor
+
+        skill_dir.mkdir(parents=True)
+
+        (skill_dir / ".env").write_text("SHOPIFY_API_KEY=skill_key")
+        (skills_dir / ".env").write_text("SHOPIFY_API_KEY=skills_key\nSHOP_DOMAIN=skills.myshopify.com")
+
+        monkeypatch.setenv("SHOPIFY_API_KEY", "process_key")
+
+        config = EnvLoader.load_config(skill_dir)
+
+        assert config.shopify_api_key == "process_key"
+        # Shop domain from skills/.env
+        assert config.shop_domain == "skills.myshopify.com"
+
+    def test_load_config_no_files(self, tmp_path):
+        """Test configuration loading with no .env files."""
+        config = EnvLoader.load_config(tmp_path)
+
+        assert config.shopify_api_key is None
+        assert config.shopify_api_secret is None
+        assert config.shop_domain is None
+        assert config.scopes is None
+
+
+class TestShopifyInitializer:
+    """Test ShopifyInitializer class."""
+
+    @pytest.fixture
+    def config(self):
+        """Create test config."""
+        return EnvConfig(
+            shopify_api_key="test_key",
+            shopify_api_secret="test_secret",
+            shop_domain="test.myshopify.com",
+            scopes="read_products,write_products"
+        )
+
+    @pytest.fixture
+    def initializer(self, config):
+        """Create initializer instance."""
+        return ShopifyInitializer(config)
+
+    def test_prompt_with_default(self, initializer):
+        """Test prompt with default value."""
+        with patch('builtins.input', return_value=''):
+            result = initializer.prompt("Test", "default_value")
+            assert result == "default_value"
+
+    def test_prompt_with_input(self, initializer):
+        """Test prompt with user input."""
+        with patch('builtins.input', return_value='user_input'):
+            result = initializer.prompt("Test", "default_value")
+            assert result == "user_input"
+
+    def test_select_option_valid(self, initializer):
+        """Test select option with valid choice."""
+        options = ['app', 'extension', 'theme']
+        with patch('builtins.input', return_value='2'):
+            result = initializer.select_option("Choose", options)
+            assert result == 'extension'
+
+    def test_select_option_invalid_then_valid(self, initializer):
+        """Test select option with invalid then valid choice."""
+        options = ['app', 'extension']
+        with patch('builtins.input', side_effect=['5', 'invalid', '1']):
+            result = initializer.select_option("Choose", options)
+            assert result == 'app'
+
+    def test_check_cli_installed_success(self, initializer):
+        """Test CLI installed check - success."""
+        mock_result = Mock()
+        mock_result.returncode = 0
+
+        with patch('subprocess.run', return_value=mock_result):
+            assert initializer.check_cli_installed() is True
+
+    def test_check_cli_installed_failure(self, initializer):
+        """Test CLI installed check - failure."""
+        with patch('subprocess.run', side_effect=FileNotFoundError):
+            assert initializer.check_cli_installed() is False
+
+    def test_create_app_config(self, initializer, tmp_path):
+        """Test creating app configuration file."""
+        initializer.create_app_config(tmp_path, "test-app", "read_products")
+
+        config_file = tmp_path / "shopify.app.toml"
+        assert config_file.exists()
+
+        content = config_file.read_text()
+        assert 'name = "test-app"' in content
+        assert 'scopes = "read_products"' in content
+        assert 'client_id = "test_key"' in content
+
+    def test_create_extension_config(self, initializer, tmp_path):
+        """Test creating extension configuration file."""
+        initializer.create_extension_config(tmp_path, "test-ext", "checkout")
+
+        config_file = tmp_path / "shopify.extension.toml"
+        assert config_file.exists()
+
+        content = config_file.read_text()
+        assert 'name = "test-ext"' in content
+        assert 'purchase.checkout.block.render' in content
+
+    def test_create_extension_config_admin_action(self, initializer, tmp_path):
+        """Test creating admin action extension config."""
+        initializer.create_extension_config(tmp_path, "admin-ext", "admin_action")
+
+        config_file = tmp_path / "shopify.extension.toml"
+        content = config_file.read_text()
+        assert 'admin.product-details.action.render' in content
+
+    def test_create_readme(self, initializer, tmp_path):
+        """Test creating README file."""
+        initializer.create_readme(tmp_path, "app", "Test App")
+
+        readme_file = tmp_path / "README.md"
+        assert readme_file.exists()
+
+        content = readme_file.read_text()
+        assert '# Test App' in content
+        assert 'shopify app dev' in content
+
+    @patch('builtins.input')
+    @patch('builtins.print')
+    def test_init_app(self, mock_print, mock_input, initializer, tmp_path, monkeypatch):
+        """Test app initialization."""
+        monkeypatch.chdir(tmp_path)
+
+        # Mock user inputs
+        mock_input.side_effect = ['my-app', 'read_products,write_products']
+
+        initializer.init_app()
+
+        # Check directory created
+        app_dir = tmp_path / "my-app"
+        assert app_dir.exists()
+
+        # Check files created
+        assert (app_dir / "shopify.app.toml").exists()
+        assert (app_dir / "README.md").exists()
+        assert (app_dir / "package.json").exists()
+
+        # Check package.json content
+        package_json = json.loads((app_dir / "package.json").read_text())
+        assert package_json['name'] == 'my-app'
+        assert 'dev' in package_json['scripts']
+
+    @patch('builtins.input')
+    @patch('builtins.print')
+    def test_init_extension(self, mock_print, mock_input, initializer, tmp_path, monkeypatch):
+        """Test extension initialization."""
+        monkeypatch.chdir(tmp_path)
+
+        # Mock user inputs: type selection (1 = checkout), name
+        mock_input.side_effect = ['1', 'my-extension']
+
+        initializer.init_extension()
+
+        # Check directory and files created
+        ext_dir = tmp_path / "my-extension"
+        assert ext_dir.exists()
+        assert (ext_dir / "shopify.extension.toml").exists()
+        assert (ext_dir / "README.md").exists()
+
+    @patch('builtins.input')
+    @patch('builtins.print')
+    def test_init_theme(self, mock_print, mock_input, initializer):
+        """Test theme initialization."""
+        mock_input.return_value = 'my-theme'
+
+        initializer.init_theme()
+
+        assert mock_print.called
+
+    @patch('builtins.print')
+    def test_run_no_cli(self, mock_print, initializer):
+        """Test run when CLI not installed."""
+        with patch.object(initializer, 'check_cli_installed', return_value=False):
+            with pytest.raises(SystemExit) as exc_info:
+                initializer.run()
+            assert exc_info.value.code == 1
+
+    @patch.object(ShopifyInitializer, 'check_cli_installed', return_value=True)
+    @patch.object(ShopifyInitializer, 'init_app')
+    @patch('builtins.input')
+    @patch('builtins.print')
+    def test_run_app_selected(self, mock_print, mock_input, mock_init_app, mock_cli_check, initializer):
+        """Test run with app selection."""
+        mock_input.return_value = '1'  # Select app
+
+        initializer.run()
+
+        mock_init_app.assert_called_once()
+
+    @patch.object(ShopifyInitializer, 'check_cli_installed', return_value=True)
+    @patch.object(ShopifyInitializer, 'init_extension')
+    @patch('builtins.input')
+    @patch('builtins.print')
+    def test_run_extension_selected(self, mock_print, mock_input, mock_init_ext, mock_cli_check, initializer):
+        """Test run with extension selection."""
+        mock_input.return_value = '2'  # Select extension
+
+        initializer.run()
+
+        mock_init_ext.assert_called_once()
+
+
+class TestMain:
+    """Test main function."""
+
+    @patch('shopify_init.ShopifyInitializer')
+    @patch('shopify_init.EnvLoader')
+    def test_main_success(self, mock_loader, mock_initializer):
+        """Test main function success path."""
+        from shopify_init import main
+
+        mock_config = Mock()
+        mock_loader.load_config.return_value = mock_config
+
+        mock_init_instance = Mock()
+        mock_initializer.return_value = mock_init_instance
+
+        with patch('builtins.print'):
+            main()
+
+        mock_init_instance.run.assert_called_once()
+
+    @patch('shopify_init.ShopifyInitializer')
+    @patch('sys.exit')
+    def test_main_keyboard_interrupt(self, mock_exit, mock_initializer):
+        """Test main function with keyboard interrupt."""
+        from shopify_init import main
+
+        mock_initializer.return_value.run.side_effect = KeyboardInterrupt
+
+        with patch('builtins.print'):
+            main()
+
+        mock_exit.assert_called_with(0)
+
+    @patch('shopify_init.ShopifyInitializer')
+    @patch('sys.exit')
+    def test_main_exception(self, mock_exit, mock_initializer):
+        """Test main function with exception."""
+        from shopify_init import main
+
+        mock_initializer.return_value.run.side_effect = Exception("Test error")
+
+        with patch('builtins.print'):
+            main()
+
+        mock_exit.assert_called_with(1)
+
+
+class TestEnvConfig:
+    """Test EnvConfig dataclass."""
+
+    def test_env_config_defaults(self):
+        """Test EnvConfig default values."""
+        config = EnvConfig()
+
+        assert config.shopify_api_key is None
+        assert config.shopify_api_secret is None
+        assert config.shop_domain is None
+        assert config.scopes is None
+
+    def test_env_config_with_values(self):
+        """Test EnvConfig with values."""
+        config = EnvConfig(
+            shopify_api_key="key",
+            shopify_api_secret="secret",
+            shop_domain="test.myshopify.com",
+            scopes="read_products"
+        )
+
+        assert config.shopify_api_key == "key"
+        assert config.shopify_api_secret == "secret"
+        assert config.shop_domain == "test.myshopify.com"
+        assert config.scopes == "read_products"