Windsurf Rules, Strategies, and Templates

In our first blog, we shared how developers can take their very first step into AI-assisted development, especially with Magento and Shopify. We focused on easing into AI with small, practical wins, like using lightweight models and experimenting with Shopify features for quick results. But once you take that first step, the next question naturally arises: how do we make AI adoption sustainable and scalable across a whole team?

For us at Codilar, the answer came with Windsurf Rules.

Why Rules Matter for Teams

Without rules, AI generated code can create as many problems as it solves. Different developers may get different outputs, styles clash, and reviews become repetitive. Security standards might slip, and performance bottlenecks can creep in unnoticed. Over time, this can lead to technical debt instead of efficiency.

With Windsurf Rules, we introduced guardrails that made AI adoption consistent and safe. Rules ensured that every line of code produced by AI aligned with our standards, frameworks, and security guidelines. This was the foundation for scaling AI across multiple developers and projects.

Windsurf Rule Templates: A Practical Starting Point

One of the best things we discovered was Windsurf’s Rule Templates. These pre-defined templates gave us a head start instead of forcing us to create rules from scratch. For Magento, in particular, the templates covered:

• Architecture & Structure: Module setup, DI, repositories, and MVVM patterns.
  
• Coding Standards: PSR-12 compliance, naming conventions, docblocks.
  
• Security & Performance: Input validation, caching, and prevention of SQL injection.
  
• Testing & QA: Unit and integration tests.
  
• Compliance & Deployment: PCI, GDPR, and environment best practices.
  

👉 For developers who want to dive deeper, here’s our detailed reference:
Magento 2 Backend Rules & Best Practices

By leaning on these templates, our team avoided weeks of trial and error. Instead, we had a clear playbook to keep AI generated output in line with Magento and Shopify best practices.

Where Rules Live and How They Activate

Windsurf keeps rules at three levels:

• Global: a single file, global_rules.md, applied across all your workspaces.
• Workspace: one file per rule in your project's .windsurf/rules folder, each with its own activation mode set in the file's frontmatter.
• System: rules deployed by IT, which users can't edit and which merge with the other two levels.

Windsurf can also read AGENTS.md files, a format used by other coding agents such as OpenAI Codex. An AGENTS.md in the project root is always on, and one in a subdirectory applies to that directory. Keep each rule short, because Windsurf limits the global file to 6,000 characters and each workspace rule file to 12,000.

Because workspace rules are plain files in your repository, they can be version-controlled and reviewed like code, which makes them easy for a team to share and refine.

Implementing Rules in Practice

Rolling out Windsurf Rules does not have to be overwhelming. Our approach was:

1. Start with 5 to 10 essential rules.
   
2. Test them in small features before applying widely.
   
3. Involve the team in shaping and refining rules.
   
4. Update them as projects evolve.
   

This kept the adoption lightweight and team friendly. To help others, Codilar is happy to share a basic rules sheet that can be applied right away. Request it here.

The Outcome of Windsurf Rules

By embedding Windsurf Rules into our workflow, AI turned from just a coding helper into a reliable development partner. For us, the results have been clear:

• 30% efficiency gains in bug fixes, design changes, and minor enhancements.
  
• Multifold efficiency in creating new modules and pages.
  
• Fewer review cycles and less refactoring.
  
• More consistent, secure, and maintainable code.