What are Cursor Rules?
Cursor Rules is Cursor IDE's project configuration file that tells the AI how to generate code for your project. Defines tech stack, coding conventions, and best practices.
In one sentence: Cursor IDE project-level AI configuration — define tech stack and coding conventions to reduce AI hallucinations and improve code consistency. Community offers many templates.
For: Developers and teams using Cursor IDE.
Rule Types
1. Tech Stack Rules
Specify language, framework, and version preferences.
2. Architecture Rules
Define layered architecture and dependency directions.
3. Testing Rules
Test framework, naming, and coverage requirements.
FAQ
Q: Does Claude Code have a similar feature?
A: Claude Code uses CLAUDE.md — same concept.
Q: How long should the rules be? A: 200-500 lines works best.