Instructions for Creating a Salesforce B2C Commerce (SFRA) Cartridge

This document provides instructions to create, configure, and deploy a new custom cartridge for Salesforce B2C Commerce using the Storefront Reference Architecture (SFRA).

NOTE: When doing this, also consult the sfcc-sfra-controllers skill for controller development patterns and the sfcc-performance skill to ensure your cartridge follows performance optimization strategies and coding standards.

1. Core Principles

Cartridge: A cartridge is a self-contained module for code and data. It is the fundamental unit for extending functionality.

Cartridge Path: A colon-separated list of cartridge names that dictates the order of code execution. The path is searched from left to right, and the first resource found is used.

Override Mechanism: To customize functionality, create a new cartridge (e.g., app_custom_mybrand) and place it at the beginning of the cartridge path. This allows your custom files to override the base functionality without modifying the core app_storefront_base cartridge.

Example Path: app_custom_mybrand:app_storefront_base

2. Prerequisites

• •Git Client: Installed and configured.
• •Node.js: Version 18 is recommended for compatibility.
• •SFCC Sandbox: Access to a sandbox instance, including Business Manager credentials.
• •GitHub Access: Ability to clone SalesforceCommerceCloud repositories.

3. Environment Setup

Create a parent project directory.

Clone the following repositories as siblings inside the parent directory:

Note: This step is not necessary unless specifically asked for. You should only clone these if the user requests it, for most projects, there is only a need for the new cartridge that is being built - but not the entire storefront reference architecture.

# Contains the base cartridge (app_storefront_base)
git clone git@github.com:SalesforceCommerceCloud/storefront-reference-architecture.git

# Contains build and deployment scripts
git clone git@github.com:SalesforceCommerceCloud/sgmf-scripts.git

Install dependencies:

cd storefront-reference-architecture
npm install

4. Cartridge File Structure

A new cartridge should be created using the provided scaffolding tool. The core structure is as follows:

package.json
.eslintrc.json
.eslintignore
.stylelintrc.json
.gitignore
README.md
dw.json    
webpack.config.js           
cartridges/
└── plugin_my_custom_cartridge/
    |── package.json
    └── cartridge/
        ├── client/             
        │   └── default/
        │       ├── js/
        │       └── scss/
        ├── controllers/        
        ├── models/             
        ├── scripts/            
        └── templates/       
            └── default/

Optional but common directories:

• •cartridge/forms/default/: XML form definitions.
• •cartridge/services/: Definitions for external web service integrations.
• •cartridge/scripts/jobs/: Scripts for automated tasks scheduled in Business Manager.
• •cartridge/properties/: Localization string files (.properties).

4.1 Cartridge package.json Capabilities (Often Missed)

Beyond basic metadata, package.json can declare cartridge-owned configuration files that the platform consumes. The package.json must be in the cartridge root (cartridges/{{mycartridge}}/package.json), and paths are relative to that.

• •Hooks: add a hooks entry pointing to your hooks.json (commonly under cartridge/scripts/hooks.json).
• •Custom Caches: add a caches entry pointing to caches.json so CacheMgr.getCache('<id>') can resolve your cache.
• •Custom SCAPI APIs: custom endpoints live under cartridge/rest-apis/{api-name}/ (with schema.yaml, script.js, api.json).

Example snippet:

{
    "name": "plugin_my_custom_cartridge",
    "hooks": "./cartridge/scripts/hooks.json",
    "caches": "./caches.json"
}

5. Creating a New Cartridge

Step 1: Generate the Cartridge Structure

!IMPORTANT!: Always do this step, don't attempt to create the cartridge structure manually. The MCP server ensures all necessary files and configurations are created correctly.

Using MCP Server (Recommended) Use the generate_cartridge_structure tool from the sfcc-dev-mcp server to automatically create the cartridge structure:

{
  "cartridgeName": "plugin_my_custom_cartridge",
  "targetPath": "/path/to/your/project",
  "fullProjectSetup": true
}

This tool will:

• •Create all necessary configuration files (package.json, webpack.config.js, etc.)
• •Set up the complete cartridge structure with proper organization
• •Ensure the cartridge is created exactly where needed in your project structure
• •Generate all required directories and files for a fully functional cartridge

6. "Hello, World" Example

Step 1: Navigate to Your Project

After creating the cartridge structure, navigate to your project directory:

# If you kept the subdirectory structure:
cd plugin_my_custom_cartridge

# If you moved files to root level, you're already in the right place

Step 2: Create the Controller

File: cartridges/plugin_my_custom_cartridge/cartridge/controllers/Hello.js

'use strict';

var server = require('server');

// URL: /Hello-Show
server.get('Show', function (req, res, next) {
    res.render('hello/helloTemplate', {
        message: 'Hello from a custom cartridge!'
    });
    next();
});

module.exports = server.exports();

Step 3: Create the ISML Template

File: cartridges/plugin_my_custom_cartridge/cartridge/templates/default/hello/helloTemplate.isml

<iscontent type="text/html" charset="UTF-8" compact="true"/>
<isdecorate template="common/layout/page">
    <isreplace name="main">
        <div class="container">
            <h1>Custom Page</h1>
            <p>${pdict.message}</p>
        </div>
    </isreplace>
</isdecorate>

Step 4: Update Deployment Configuration

Ensure your dw.json file has the correct sandbox credentials (this file is automatically generated but needs your specific sandbox details).

7. Deployment and Registration

Step 1: Upload the Cartridge

From the project root, run:

npm run uploadCartridge plugin_my_custom_cartridge

For continuous development, use npm run watch.

8. Naming Conventions & Best Practices

Cartridge Naming: Use standard prefixes.

• •app_custom_*: Site-specific customizations.
• •int_*: Third-party integrations.
• •bm_*: Business Manager extensions.
• •plugin_*: Reusable SFRA feature extensions.

File Naming: Controllers use PascalCase.js. Other JS files use camelCase.js.

NEVER modify app_storefront_base or other base/plugin cartridges directly.

Extend, Don't Replace: Use server.append() or server.prepend() to extend controllers. Avoid server.replace().

Logic-less Templates: Keep business logic out of ISML files. Use models to prepare data.

Security: Protect all state-changing POST requests with CSRF tokens. Properly encode all user-provided output to prevent XSS.

Localization: Use Resource.msg() in templates to fetch text from .properties files.

9. MCP Integration Workflow

When using the sfcc-dev-mcp server for cartridge development, follow this enhanced workflow:

1. •Generate Cartridge Structure: Use the generate_cartridge_structure tool to create the initial cartridge with all necessary files and configurations
2. •Consult Skills: Use the relevant skills for controller development patterns (sfcc-sfra-controllers), security (sfcc-security), and performance (sfcc-performance)
3. •Search Documentation: Use search_sfcc_classes and get_sfcc_class_info for API reference
4. •Debug Issues: Use log analysis tools to troubleshoot deployment or runtime issues
5. •Handle Deployment Issues: If new cartridge features (jobs, SCAPI endpoints, hooks) don't appear after upload:
   • •Check Code Versions: Use get_code_versions tool to see available versions
   • •Activate Version: Use activate_code_version tool to ensure proper registration
   • •Alternative: Manually switch code versions in Business Manager (Administration > Site Development > Code Deployment)

Common Deployment Troubleshooting

Issue: Custom jobs or SCAPI endpoints not visible after cartridge deployment Solution:

1. •Use MCP get_code_versions tool to check available code versions
2. •Use MCP activate_code_version tool to switch to the uploaded version
3. •Verify registration in logs using log analysis tools

Issue: Hooks not taking effect after deployment Solution: Follow the same code version activation process above

This integrated approach ensures your cartridge follows all best practices and leverages the full power of the SFCC development ecosystem with direct file generation capabilities.