About Agent Rules Builder
The free tool for generating AI coding assistant rules.
AI coding assistants work best when they understand your project's conventions. Agent Rules Builder helps you create structured rules files (.cursorrules, CLAUDE.md, .github/copilot-instructions.md, etc.) so your AI assistant writes code the way you want it to.
Rather than writing rules from scratch, you can pick from hundreds of curated options — organized by language, framework, and category — then export in the format your agent needs. Every rule is distilled from real open-source projects and condensed at three verbosity tiers: concise, balanced, and detailed.
Key Features
Multi-Agent Support
Generate rules for Cursor, Claude Code, GitHub Copilot, Windsurf, Gemini, Codex, and more — all from a single builder.
Community-Driven Rules
Rules are distilled from thousands of real-world GitHub repositories, curated and condensed by AI for quality and relevance.
40+ Languages & Frameworks
TypeScript, Python, Rust, Go, Swift, and more — with framework-specific rules for React, Django, Rails, and hundreds of others.
Share & Fork
Save your rule sets, share them with a public link, and fork others' configurations as a starting point for your own.
Free to Use
Agent Rules Builder is completely free. There are no usage limits, no sign-up required, and no premium tiers. Feedback and feature requests are welcome.
Have questions or suggestions? Get in touch.