OnlyRules

A CLI tool to easily sync all of your favorite AI assistant instruction files from a single source. Inspired by rulesync.

Features

• Generate rule files for multiple AI assistants from a single source
• Support for both URL and local file sources
• Built-in templates to help you get started
• Multi-step rule generation process
• Written in TypeScript with Bun for optimal performance

Supported AI Assistants

• Claude → CLAUDE.md
• Cursor → .cursorrules
• GitHub Copilot → .github/copilot-instructions.md
• Gemini → GEMINI.md
• OpenAI Codex → AGENTS.md
• Cline → .clinerules/project.md
• Junie → .junie/guidelines.md
• Windsurf → .windsurfrules
• Trae → .trae/rules.md
• Lingma → .lingma/rules
• Kiro → .kiro/steering
• Tencent Cloud CodeBuddy → .codebuddy/rules/{name}.md

Installation

Prerequisites

• Bun 1.0.0 or higher
• Node.js 18.0.0 or higher

Global Installation

bun install -g onlyrules

Local Installation

bun install onlyrules

Getting Started

The quickest way to get started with OnlyRules is to initialize a new project:

npx rulesync init

This will create a basic configuration and template files in your current directory. After initialization, you can:

1. Edit the generated rule template files in the .augment/rules directory
2. Generate AI assistant-specific rule files using the generate command
3. Customize your setup using the available templates

For more advanced usage, see the sections below.

Usage

Generate Rule Files

From a local file:

onlyrules generate -f ./rules.md

From a URL:

onlyrules generate -f "https://onlyrules.codes/api/rules/raw?id=cmd9nww9z0007l5040oegtmb1"

Specify an output directory:

onlyrules generate -f ./rules.md -o ./output

Force overwrite existing files:

onlyrules generate -f ./rules.md --force

Generate rules for specific AI assistants only:

onlyrules generate -f ./rules.md --target cursor,windsurf

onlyrules generate -f ./rules.md --target kiro,cursor,codebuddy

Available targets include: cursor, copilot, cline, claude, gemini, roo, kiro, codebuddy, windsurf, agents, junie, trae, augment, lingma

Add rules to the rulesync.mdc

onlyrules add -f ./rules-new.mdc

The add command appends new rules to the rulesync.mdc file. When appending:

• New rules are automatically separated from existing content with a section divider (---)
• Supports both local files and remote URLs as source
• Creates rulesync.mdc if it doesn't exist
• Preserves existing content while adding new rules

Options:

• -f, --file <path>: Source file or URL containing rules to append (required)
• -o, --output <path>: Target file to append to (default: ./rulesync.mdc)

Examples:

# Append from local file
onlyrules add -f ./new-rules.mdc
# Append from remote URL
onlyrules add -f https://example.com/rules.mdc
# Append to custom target file
onlyrules add -f ./rules.mdc -o ./custom-rules.mdc

Working with Templates

List available templates:

onlyrules templates

View a specific template:

onlyrules template basic

Create a new rules file from a template:

onlyrules init development -o ./my-rules.md

Templates

OnlyRules comes with several built-in templates to help you get started:

• basic: Simple rules for general AI assistant behavior
• development: Rules focused on software development practices
• multi-step: A structured approach to creating comprehensive rules

Kiro AI Support

OnlyRules now supports Kiro AI's steering file system. Kiro uses markdown files in .kiro/steering/ to provide persistent project knowledge.

Kiro Steering Features

• Automatic Inclusion Modes: Files can be configured to load always, conditionally based on file patterns, or manually
• Default Steering Files: Automatically maps common rules to Kiro's default files (product.md, tech.md, structure.md)
• Smart File Pattern Detection: Automatically configures file patterns for component, API, and test-specific rules

Kiro Example

Use the Kiro example template to get started:

onlyrules init kiro-example

This creates a comprehensive set of steering files demonstrating:

• Always-included core project documentation
• File-pattern-based rules for components and APIs
• Manual inclusion for specialized guidelines

Kiro Inclusion Modes

When generating rules for Kiro, OnlyRules automatically configures appropriate inclusion modes:

1. Always (default for root rules): Loaded in every Kiro interaction
2. FileMatch: Automatically included when working with matching files
3. Manual: Available on-demand by referencing with #steering-file-name

Development

Setup

# Clone the repository
git clone https://github.com/yourusername/onlyrules.git
cd onlyrules
# Install dependencies
bun install
# Build the project
bun run build
# Run tests
bun run test

Testing

This project uses Vitest for testing and follows Test-Driven Development (TDD) principles:

# Run tests once
bun run test# Run tests in watch mode
bun run test:watch
# Run tests with coverage
bun run test:coverage

Linting and Formatting

This project uses Biome for linting and formatting:

# Format code
bun run format
# Lint code
bun run lint
# Fix linting issues
bun run lint:fix

License

MIT