rulesync

A Node.js CLI tool that automatically generates configuration files for various AI development tools from unified AI rule files (.rulesync/*.md). Also imports existing AI tool configurations into the unified format.

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Supported Tools

rulesync supports both generation and import for the following AI development tools:

• GitHub Copilot Custom Instructions (.github/copilot-instructions.md + .github/instructions/*.instructions.md)
• Cursor Project Rules (.cursor/rules/*.mdc + .cursorrules)
• Cline Rules (.clinerules/*.md + .cline/instructions.md)
• Claude Code Memory (./CLAUDE.md + .claude/memories/*.md)
• Roo Code Rules (.roo/rules/*.md + .roo/instructions.md)
• Gemini CLI (GEMINI.md + .gemini/memories/*.md)

Installation

npm install -g rulesync
# or
pnpm add -g rulesync
# or  
yarn global add rulesync

Getting Started

New Project

1. Initialize your project:

   npx rulesync init

2. Edit the generated rule files in .rulesync/ directory to match your project needs

   Or add new rule files:

   npx rulesync add my-custom-rules

3. Generate tool-specific configuration files:

   npx rulesync generate

4. Optional: Add generated files to .gitignore:

   npx rulesync gitignore

Existing Project with AI Tool Configurations

If you already have AI tool configurations, you can import them into rulesync format:

1. Import existing configurations:

   # Import from specific tools (only one tool can be specified at a time)
   npx rulesync import --claudecode  # From CLAUDE.md and .claude/memories/*.md
   npx rulesync import --cursor      # From .cursorrules and .cursor/rules/*.mdc
   npx rulesync import --copilot     # From .github/copilot-instructions.md
   npx rulesync import --cline       # From .cline/instructions.md
   npx rulesync import --roo         # From .roo/instructions.md
   npx rulesync import --geminicli   # From GEMINI.md and .gemini/memories/*.md

2. Review and edit the imported rules in .rulesync/ directory

3. Generate unified configurations:

   npx rulesync generate

That's it! Your AI coding assistants will now use the generated configuration files automatically.

Why rulesync?

🔧 Tool Flexibility

Team members can freely choose their preferred AI coding tools. Whether it's GitHub Copilot, Cursor, Cline, or Claude Code, each developer can use the tool that maximizes their productivity.

📈 Future-Proof Development

AI development tools evolve rapidly with new tools emerging frequently. With rulesync, switching between tools doesn't require redefining your rules from scratch.

🎯 Multi-Tool Workflow

Enable hybrid development workflows combining multiple AI tools:

• GitHub Copilot for code completion
• Cursor for refactoring
• Claude Code for architecture design
• Cline for debugging assistance
• Gemini CLI for intelligent code analysis

🔓 No Vendor Lock-in

Avoid vendor lock-in completely. If you decide to stop using rulesync, you can continue using the generated rule files (.github/instructions/, .cursor/rules/, .clinerules/, CLAUDE.md, GEMINI.md, etc.) as-is.

🎯 Consistency Across Tools

Apply consistent rules across all AI tools, improving code quality and development experience for the entire team.

Claude Code Integration

Creating Custom Slash Commands

Instead of using Claude Code's built-in /init command, we recommend creating a custom slash command specifically for rulesync.

Refer to the Claude Code slash commands documentation and add the following custom command:

.claude/commands/init-rulesync.md

Review this project's content and update .rulesync/*.md files as needed.

Steps:
1. Analyze project structure and codebase
2. Review existing .rulesync/ files
3. Consider project's tech stack, architecture, and coding conventions
4. Update .rulesync/*.md files if missing elements or improvements are found
5. Run rulesync generate if necessary

Project characteristics to consider:
- Technology stack
- Architecture patterns
- Coding conventions
- Security requirements
- Performance considerations

Integration Benefits

• Project-Specific Initialization: Optimized rule configuration for each project
• Automatic Rule Updates: Rules adapt to project changes automatically
• Team Standardization: All members use the same rule set
• Continuous Improvement: Rules evolve with project growth

Usage

1. Initialize

npx rulesync init

This creates a .rulesync/ directory with sample rule files.

2. Edit Rule Files

Define metadata in front matter for each Markdown file in the .rulesync/ directory. See the Example Files section below for detailed examples.

Rule Levels

rulesync uses a two-level rule system:

• root: true: Project-wide overview and policies
  • Only one root file is allowed per project
  • Contains high-level guidelines and project context
• root: false: Specific implementation rules and detailed guidelines
  • Multiple non-root files are allowed
  • Contains specific coding rules, naming conventions, etc.

Tool-Specific Behavior

Each AI tool handles rule levels differently:

Tool	Root Rules	Non-Root Rules	Special Behavior
Claude Code	./CLAUDE.md	.claude/memories/*.md	CLAUDE.md includes @filename references to detail files
Cursor	cursorRuleType: always	cursorRuleType: specificFiles (with globs) cursorRuleType: intelligently (with description) cursorRuleType: manual (default)	Advanced rule type system based on content analysis
GitHub Copilot	Standard format	Standard format	All rules use same format with frontmatter
Cline	Standard format	Standard format	All rules use plain Markdown format
Roo Code	Standard format	Standard format	All rules use plain Markdown format with description header
Gemini CLI	GEMINI.md	.gemini/memories/*.md	GEMINI.md includes @filename references to memory files

3. Generate Configuration Files

# Generate for all tools
npx rulesync generate

# Generate for specific tools
npx rulesync generate --copilot
npx rulesync generate --cursor  
npx rulesync generate --cline
npx rulesync generate --claudecode
npx rulesync generate --roo
npx rulesync generate --geminicli

# Clean build (delete existing files first)
npx rulesync generate --delete

# Clean build for specific tools
npx rulesync generate --copilot --cursor --delete

# Verbose output
npx rulesync generate --verbose
npx rulesync generate --delete --verbose

# Generate in specific base directories (monorepo support)
npx rulesync generate --base-dir ./packages/frontend
npx rulesync generate --base-dir ./packages/frontend,./packages/backend
npx rulesync generate --base-dir ./apps/web,./apps/api,./packages/shared

Generate Options

• --delete: Remove all existing generated files before creating new ones
• --verbose: Show detailed output during generation process
• --copilot, --cursor, --cline, --claudecode, --roo, --geminicli: Generate only for specified tools
• --base-dir <paths>: Generate configuration files in specified base directories (comma-separated for multiple paths). Useful for monorepo setups where you want to generate tool-specific configurations in different project directories.

4. Import Existing Configurations

If you already have AI tool configurations in your project, you can import them to rulesync format:

# Import from existing AI tool configurations
npx rulesync import --claudecode # Import from CLAUDE.md and .claude/memories/*.md
npx rulesync import --cursor     # Import from .cursorrules and .cursor/rules/*.md
npx rulesync import --copilot    # Import from .github/copilot-instructions.md and .github/instructions/*.instructions.md
npx rulesync import --cline      # Import from .cline/instructions.md
npx rulesync import --roo        # Import from .roo/instructions.md
npx rulesync import --geminicli  # Import from GEMINI.md and .gemini/memories/*.md

# Import each tool individually
npx rulesync import --claudecode
npx rulesync import --cursor
npx rulesync import --copilot

# Verbose output during import
npx rulesync import --claudecode --verbose

The import command will:

• Parse existing configuration files from each AI tool using custom parsers
• Convert them to rulesync format with appropriate frontmatter metadata
• Create new .rulesync/*.md files with imported content and proper rule categorization
• Use tool-specific prefixes to avoid filename conflicts (e.g., claudecode-overview.md, cursor-custom-rules.md)
• Generate unique filenames if conflicts occur
• Support complex formats like Cursor's MDC files with YAML frontmatter
• Handle multiple file imports (e.g., all files from .claude/memories/ directory)

Cursor Import Details

When importing from Cursor, the following four rule types are automatically identified:

1. always (cursorRuleType: always)

   • Condition: alwaysApply: true is set
   • Conversion: Imported as root rule (root: false), with globs: ["**/*"] set

2. manual (cursorRuleType: manual)

   • Condition: empty description + empty globs + alwaysApply: false
   • Conversion: Imported with empty globs patterns (manual application rule)

3. specificFiles (cursorRuleType: specificFiles)

   • Condition: globs specified (regardless of description)
   • Conversion: Specified globs patterns preserved as array, description set to empty string

4. intelligently (cursorRuleType: intelligently)

   • Condition: description specified + empty globs
   • Conversion: Description preserved, empty globs patterns set

Edge Case Handling

• Non-empty description + non-empty globs: Processed as specificFiles (globs patterns take priority)
• No matching conditions: Processed as manual (default)

Supported Files

• .cursorrules (legacy format)
• .cursor/rules/*.mdc (modern MDC format)
• .cursorignore (ignore patterns)
• .cursor/mcp.json (MCP server configuration)

5. Other Commands

# Initialize project with sample files
npx rulesync init

# Add a new rule file
npx rulesync add <filename>
npx rulesync add typescript-rules
npx rulesync add security.md  # .md extension is automatically handled

# Validate rule files
npx rulesync validate

# Check current status  
npx rulesync status

# Watch files and auto-generate
npx rulesync watch

# Add generated files to .gitignore
npx rulesync gitignore

Configuration File Structure

.rulesync/
├── overview.md          # Project overview (root: true, only one)
├── coding-rules.md      # Coding rules (root: false)
├── naming-conventions.md # Naming conventions (root: false)
├── architecture.md      # Architecture guidelines (root: false)  
├── security.md          # Security rules (root: false)
└── custom.md           # Project-specific rules (root: false)

Excluding Files with .rulesyncignore

You can exclude specific rule files from being processed by creating a .rulesyncignore file in your project root. This file uses gitignore-style patterns.

Example .rulesyncignore:

# Ignore test rule files
**/*.test.md

# Ignore temporary files
tmp/**/*

# Ignore draft rules
draft-*.md
*-draft.md

When .rulesyncignore exists, rulesync will:

1. Skip matching files during rule processing
2. Generate tool-specific ignore files:
   • .cursorignore for Cursor
   • .clineignore for Cline
   • .rooignore for Roo Code
   • .copilotignore for GitHub Copilot (community tools)
   • .aiexclude for Gemini CLI
   • Update .claude/settings.json permissions.deny with Read() rules for Claude Code

Frontmatter Schema

Each rule file must include frontmatter with the following fields:

---
root: true | false               # Required: Rule level (true for overview, false for details)
targets: ["*"]                   # Required: Target tools (* = all, or specific tools)
description: "Brief description" # Required: Rule description
globs: "**/*.ts,**/*.js"          # Required: File patterns (comma-separated or empty string)
cursorRuleType: "always"         # Optional: Cursor-specific rule type (always, manual, specificFiles, intelligently)
---

cursorRuleType Field (Optional)

Additional metadata field for Cursor tool:

• always: Rules applied to the entire project constantly
• manual: Rules applied manually (default)
• specificFiles: Rules automatically applied to specific file patterns
• intelligently: Rules applied by AI judgment

Example Files

Root file (.rulesync/overview.md):

---
root: true
targets: ["*"]
description: "Project overview and development philosophy"
globs: "src/**/*.ts"
---

# Project Development Guidelines

This project follows TypeScript-first development with clean architecture principles.

Non-root file (.rulesync/coding-rules.md):

---
root: false
targets: ["copilot", "cursor", "roo"]
description: "TypeScript coding standards"
globs: "**/*.ts,**/*.tsx"
---

# TypeScript Coding Rules

- Use strict TypeScript configuration
- Prefer interfaces over types for object shapes
- Use meaningful variable names

Generated Configuration Files

Tool	Output Path	Format	Rule Level Handling
GitHub Copilot	.github/instructions/*.instructions.md	Front Matter + Markdown	Both levels use same format
Cursor	.cursor/rules/*.mdc	MDC (YAML header + Markdown)	Root: cursorRuleType: always Non-root: cursorRuleType: specificFiles (with globs) Non-root: cursorRuleType: intelligently (with description) Non-root: cursorRuleType: manual (default)
Cline	.clinerules/*.md	Plain Markdown	Both levels use same format
Claude Code	./CLAUDE.md (root) .claude/memories/*.md (non-root)	Plain Markdown	Root goes to CLAUDE.md Non-root go to separate memory files CLAUDE.md includes @filename references
Roo Code	.roo/rules/*.md	Plain Markdown	Both levels use same format with description header
Gemini CLI	GEMINI.md (root) .gemini/memories/*.md (non-root)	Plain Markdown	Root goes to GEMINI.md Non-root go to separate memory files GEMINI.md includes @filename references

Validation

rulesync validates your rule files and provides helpful error messages:

npx rulesync validate

Common validation rules:

• Only one root file (root: true) is allowed per project
• All frontmatter fields are required and properly formatted
• File patterns (globs) use valid syntax
• Target tools are recognized values

MCP (Model Context Protocol) Support

rulesync can also manage MCP server configurations for supported AI tools. This allows you to configure language servers and other MCP-compatible services once and deploy them across multiple AI coding assistants.

Supported MCP Tools

• Claude Code (.mcp.json)
• GitHub Copilot (.vscode/mcp.json)
• Cursor (.cursor/mcp.json)
• Cline (.cline/mcp.json)
• Gemini CLI (.gemini/settings.json)
• Roo Code (.roo/mcp.json)

MCP Configuration

Create a .rulesync/.mcp.json file in your project:

{
  "mcpServers": {
    "github": {
      "command": "docker",
      "args": [
        "run", "-i", "--rm",
        "-e", "GITHUB_PERSONAL_ACCESS_TOKEN",
        "ghcr.io/github/github-mcp-server"
      ],
      "env": {},
      "targets": ["*"]
    }
  }
}

MCP Configuration Fields

• mcpServers: Object containing MCP server configurations
  • command: Executable command for stdio-based servers
  • args: Command arguments
  • url: URL for HTTP/SSE-based servers
  • env: Environment variables to pass to the server
  • targets: Array of tool names to deploy this server to
    • Use specific tool names: ["claude", "cursor", "copilot"]
    • Use ["*"] to deploy to all supported tools
    • If omitted, server is deployed to all tools by default

Generating MCP Configurations

MCP configurations are generated alongside rule files:

# Generate both rules and MCP configurations
npx rulesync generate

# Generate only for specific tools
npx rulesync generate --claudecode --cursor

# Generate in specific directories (monorepo)
npx rulesync generate --base-dir ./packages/frontend

The MCP configurations will be generated in the appropriate locations for each tool, and the tools will automatically load them when started.

License

MIT License

Contributing

Issues and Pull Requests are welcome!

For development setup and contribution guidelines, see CONTRIBUTING.md.