.cursorrules Generator

What Is .cursorrules?

.cursorrules is the legacy configuration file format for Cursor AI. Placed in your project root, it provides global instructions that Cursor applies to every AI interaction within the project. While Cursor now recommends the directory-based .cursor/rules/ approach, many existing projects and tutorials still reference the .cursorrules format.

Why This Generator Exists

Despite being the older format, .cursorrules remains widely used because of its simplicity — a single file, no directory structure, no glob patterns. This generator helps you create valid, well-structured .cursorrules files from templates.

.cursorrules File Structure

A typical .cursorrules file contains markdown-formatted instructions:

# Project: My Next.js App
# Tech Stack: Next.js 16, TypeScript, Tailwind CSS

## Coding Conventions
- Use functional components with TypeScript interfaces
- Prefer server components unless client interactivity is needed
- Use named exports for components

## Testing
- Write tests using Vitest
- Follow AAA pattern (Arrange, Act, Assert)
- Aim for 80%+ coverage on business logic

## Documentation
- Document all public APIs with JSDoc
- Keep README.md up to date

Migration Path

If you decide to upgrade to the modern .cursor/rules/ format later, our Cursor Rules Generator supports both formats and can help with migration. Learn more in our project rules guide.

Common .cursorrules Mistakes

• Writing vague rules like "write clean code" without concrete examples.
• Mixing unrelated frontend, backend, and infrastructure rules without headings.
• Forgetting test commands, lint commands, and project-specific safety checks.
• Adding rules that conflict with the formatter, linter, or existing architecture.
• Keeping stale instructions after migrating frameworks or changing folder structure.

Legacy vs Modern Cursor Rules

Related Tools

Browse templates for pre-built configurations. Generate AGENTS.md files for cross-tool compatibility. Read What Are Cursor Rules for a comprehensive overview.

Frequently Asked Questions

Is .cursorrules still supported?

Many existing Cursor projects still use .cursorrules, but new projects usually benefit from the more flexible .cursor/rules/*.mdc Project Rules format.

When should I choose .cursorrules instead of Project Rules?

Choose .cursorrules when you want one simple global instruction file or when maintaining a project that already uses the legacy format.

Can I migrate a generated .cursorrules file later?

Yes. The same guidance can be split into Project Rules later so frontend, backend, testing, and documentation rules can target different file patterns.