Skip the weeks of trial and error.
The ultimate .cursorrules file, by an OpenAI Engineering Manager
Battle-tested across 50+ production applications
Who This Is For
Engineers Who Know They Need Rules
But Don't Want to Spend Weeks Building Them
The DIY Trap
You've tried writing your own rules file
Spent hours on it. Cursor still ignores half of them. Some rules conflict. Others are too vague. Nothing quite works.
You don't know what you don't know
What rules actually matter? What edge cases exist? What makes Cursor actually listen? It's all trial and error.
Every iteration takes days to validate
You change a rule. Build something. Find it didn't work. Tweak again. Weeks pass. You're still guessing.
The DIY Path
The Real Cost of
Building Your Own Rules File
You could build your own. Most engineers try. Here's what that actually looks like.
Weeks Lost to Trial and Error
You write a rule. Test it. It doesn't work. Tweak it. Test again. Weeks pass. You're still iterating on something that should just work.
What You Don't Know You Don't Know
Rule Interactions
Some rules conflict. Some amplify each other. You learn this the hard way.
Edge Cases
50+ production apps reveal edge cases you'll never discover on your own.
What Actually Works
Not what sounds good. What makes Cursor actually listen.
Priority Order
Which rules matter most. What to skip. What breaks everything.
This knowledge took 50+ production applications to develop. You can spend months discovering it yourself. Or you can have it now.
The DIY Path Looks Like This:
Why This File
50+ Production Apps.
Zero Guesswork.
This isn't theory. This is the exact file used to build applications at OpenAI and across dozens of complex production systems.
Battle-Tested at OpenAI
This file was refined across 50+ production applications. Complex SaaS platforms. Enterprise tools. AI products. Every edge case, every failure mode, every surprising Cursor behavior, encoded into rules that actually work.
Months of iteration, compressed into one file.
Your Rules vs This File
- Weeks of trial and error
- Rules that sound good but don't work
- No way to know what you're missing
- Constant iteration, uncertain results
- Working in 5 minutes
- Proven across 50+ production apps
- Every edge case already handled
- Zero guesswork, immediate results
Why This File Works When Others Don't
Generic rules fail because:
This file works because:
Refined daily across 50+ production apps.
Every failure mode discovered and solved.
The Track Record
This file has been tested across:
50+ production apps
OpenAI projects
Enterprise SaaS
Complex AI products
Every iteration learned. Every lesson encoded.
What This File Gives You:
You could spend weeks building your own rules file.
Or you could use the one that already works.
Why Should You Listen to Me?
Built by Someone Who Ships
I manage a team of 40+ engineers at OpenAI, the largest AI company in the world. We spend millions of dollars a month on world-class engineers, and this .cursorrules file is used by all of them.
- Leading a team of 40+ senior software engineers at OpenAI
- Founded Jaro.dev, a 7-figure software agency
- Previously at JPMorgan Chase & Deutsche Bank
- Top 1% by contributions on GitHub
- This exact .cursorrules file has built dozens of production apps
This .cursorrules file is the same one used to build this landing page you're reading right now.
What Others Say
Engineers Are Finally Consistent
From fighting Cursor to commanding it
I was skeptical about a rules file making a difference. Then I stopped having to fix the same regressions over and over. The consistency alone is worth 100x the price.
Michael Torres
Staff Engineer @ Stripe
Before this, every Cursor session felt like starting from scratch. Now it's like having a senior engineer who remembers everything.
Rachel Kim
Founding Engineer @ YC Startup
The architecture decay prevention alone saved us weeks of refactoring. This should be standard for every team using AI.
James Chen
Tech Lead @ Shopify
I used to spend 30% of my time fixing AI-generated code. Now it's maybe 5%. The rules file changed everything.
Sarah Mitchell
Senior Engineer @ Meta
Built 3 landing pages in one weekend. Zero drift, zero regressions. Just shipped.
David Park
Solo Developer @ Indie
Required for my entire team. The predictability is the real productivity gain.
Emily Rodriguez
Engineering Manager @ Netflix
1,000+
Engineers Using This File
50+
Production Apps Built
5hrs
Saved Per Week (Avg)
Proof It Works
Products Built Using This File
This Landing Page
You're looking at it. Built entirely with Cursor using this .cursorrules file.
RealGreatDevs
Platform with 2M+ software engineers
BusinessOS
A platform to run your business on autopilot
Pivotal
Google ads automation platform for clinics
Raise
Investment platform integrating with government portals
ReviveDeadLinks
Bootstrapped SaaS profitable within 7 days
Devthusiast
AI Newsletter read by thousands of engineers
QwikLocker
Amazon Locker but for any ecommerce brand
What's Included
Inside The Rules File
6 comprehensive sections engineered for production reliability
- Functional and declarative programming patterns
- Descriptive variable naming conventions
- Import organization and structure
- Error handling patterns
- Folder structure enforcement
- Component organization rules
- Server vs client component boundaries
- API and data fetching patterns
- Next.js App Router conventions
- Server actions or API routes
- Proper SSR and data fetching
- TypeScript strict mode patterns
- Tailwind CSS variable usage
- Responsive design guide
- Component styling patterns
- Animation and transition standards
- Destructive operation prevention
- Migration safety rules
- Authentication boundary enforcement
- Production-safe defaults
- Response format specifications
- Code-first output preferences
- Minimal commentary guidelines
- Structured return formats
Complete .cursorrules File
The exact file used in production at OpenAI and across dozens of applications. Copy, paste, ship.
Section-by-Section Documentation
Understand what each rule does and why. Customize with confidence.
Quick Start Guide
Get running in under 5 minutes. No complex setup required.
Lifetime Updates
As Cursor evolves, get updated rules that leverage new features and best practices.
The Promise
After Using This File,
You Will Be Able To:
One-shot Next.js applications and landing pages
Stop iterating. Start shipping. The file knows your patterns.
Trust Cursor's output without constant review
Rules act as guardrails. Bad outputs get caught before they ship.
Eliminate hours of context re-explaining
Say it once. Have it remembered forever. Every prompt inherits your judgment.
Prevent silent architecture decay
No more style drift. No more structural erosion. Consistent quality, always.
Get predictable, production-ready output
Boring is beautiful. Same quality every time. No surprises.
Build with AI as infrastructure, not just a tool
The difference between using AI and building with AI.
A .cursorrules file replaces repeated prompting with permanent judgment.
What You Get
The Complete Value Stack
Permanent Judgment in Every Prompt
Stop re-explaining context. Every single interaction inherits your architectural decisions, coding standards, and preferences.
Predictable, Production-Ready Output
Cursor becomes boring in the best way. Consistent, reliable, no surprises. The same quality every single time.
Silent Damage Prevention
Stop architecture decay, style drift, and bad defaults before they ship. Rules act as guardrails, not suggestions.
Hours Saved Per Week
Eliminate context re-explaining, regression fixing, and style corrections. Compound time savings over months.
The Complete .cursorrules File
50+ production apps worth of lessons learned. Battle-tested at OpenAI. Every edge case already solved. Copy, paste, ship.
Full Documentation & Setup Guide
Step-by-step guide to implement and customize the rules for your stack and preferences.
Lifetime Updates
As Cursor evolves, so does this file. Get all future updates as new features and best practices emerge.
Total Value:
Your Price Today:
$49
One-Time Payment
Prerequisites
Is This File For You?
This is for engineers who are serious about their craft.
If you check all these boxes, you're ready for predictable, production-ready AI.
Skip Weeks of Trial and Error.
Get the Battle-Tested .cursorrules File
50+ production apps. OpenAI-tested. Every edge case already solved. Copy, paste, ship.
The Battle-Tested Rules File
One-time payment. Lifetime updates.
Secure checkout. Instant download.
FAQ
Questions
You can. Most engineers try. It takes weeks of trial and error to discover what actually works. You'll write rules that sound good but don't work, discover conflicts you didn't anticipate, and constantly iterate. This file represents 50+ production apps worth of that learning - every edge case discovered, every failure mode solved. You're buying months of your time back.
Most rules files are theoretical - written by people who don't use Cursor daily at scale. This file was refined across 50+ production applications at OpenAI and other companies. Every rule has been tested against real edge cases. It's not what sounds good. It's what actually works.
Yes. The principles and structure work regardless of your tech stack. The file I provide is optimized for Next.js/TypeScript but includes patterns you can adapt to any framework. The core concepts - encoding judgment, preventing drift, eliminating context re-explaining - are universal.
Most rules files are basic - a few style preferences, maybe some framework hints. This file encodes production-grade judgment from 50+ apps: architecture protection, refactor philosophy, safety boundaries, what NOT to do. It's the difference between a reminder note and a battle-tested system.
Absolutely. The file is fully documented so you understand what each section does and why. Add your own rules, remove what doesn't apply, adapt to your preferences. It's designed to be a starting point that you own.
All sales are final. This is a digital product with immediate access. The file cannot be un-seen or un-used once delivered.