File Path Header

A lightweight Node.js CLI tool that automatically adds file path comments to your source code files. Perfect for AI coding, documentation, and keeping track of file locations in large projects.

✨ Why Use This?

• 🤖 AI-Friendly: Makes it easier for AI tools (ChatGPT, Claude, etc.) to understand your project structure
• 🔄 Auto-Updates: Automatically updates path comments when files are moved
• 🎯 Smart Filtering: Respects .gitignore rules and skips irrelevant files
• ⚡ Zero Config: Works out of the box with sensible defaults
• 🪝 Git Integration: Perfect for git hooks to keep paths synchronized

🚀 Quick Start

Installation

npm install -g file-path-header

Usage

Simply run in your project directory:

file-path-header

That's it! The tool will automatically find all supported source files and add path comments.

Before & After

Before:

import React from 'react';

function Header() {
  return <h1>Hello World</h1>;
}

After: (assuming that the file is located in: src/components/Header.js)

// src/components/Header.js
import React from 'react';

function Header() {
  return <h1>Hello World</h1>;
}

🎯 Perfect Combo with ASCII Tree Generator

For the ultimate project documentation setup, pair this with ascii-tree-generator:

# First, generate your project tree structure
npx ascii-tree-generator

# Then, add path headers to all source files
npx file-path-header

This combination gives AI tools (and developers) complete context about your project structure and individual file locations.

🛠 Supported Languages

Comment Style	File Extensions
//	.js, .ts, .jsx, .tsx, .java, .c, .cpp, .cs, .go, .rs, .php, .swift, .kt, .m, .scala
#	.py, .sh, .rb, .pl

🚫 Smart File Filtering

The tool automatically respects your .gitignore files and also ignores common build/temporary directories:

• node_modules/, .git/
• dist/, build/
• .vscode/, .idea/
• System files (.DS_Store, Thumbs.db)
• Temporary files (*.tmp, *.cache, *.log)

🔄 How It Works

1. Scans your project for supported source files
2. Respects .gitignore rules and common ignore patterns
3. Detects existing path comments and updates them if files have moved
4. Adds clean, consistent path comments at the top of each file

Smart Comment Handling

• ✅ Adds new comment if none exists
• ✅ Updates existing comment if file path changed
• ✅ Skips files that already have the correct comment
• ✅ Removes outdated path comments before adding new ones

Git Integration

Pre-commit Hook

Add to .git/hooks/pre-commit:

#!/bin/sh
# Change to the project root directory
cd "$(git rev-parse --show-toplevel)"

npx file-path-header
git add .

Package.json Script

{
  "scripts": {
    "paths": "file-path-header"
  }
}

Then run: npm run paths

📁 Example Output

After running the tool on a typical React project:

// src/App.js
import React from 'react';
// ... rest of your code

// src/components/Header.jsx  
import React from 'react';
// ... component code

// src/utils/helpers.js
export const formatDate = (date) => {
// ... utility functions

// src/hooks/useAuth.js
import { useState, useEffect } from 'react';
// ... custom hook

🚀 Use Cases

• AI Coding: Help AI understand your project structure
• Code Reviews: Quickly identify file locations in diffs
• Large Projects: Never lose track of where files are located
• Refactoring: Automatically update path comments when moving files
• Documentation: Generate consistent file headers across your project

🤝 Works Great With

• ascii-tree-generator - Generate visual project structure
• AI coding tools - ChatGPT, Claude, GitHub Copilot, etc.
• Git hooks - Keep file paths in sync automatically
• Documentation workflows - Maintain consistent project documentation

🔧 Technical Details

• Zero dependencies - Lightweight and fast
• Hierarchical .gitignore support - Respects all .gitignore files in your project
• Cross-platform - Works on Windows, macOS, and Linux

📄 License

MIT License - feel free to use in your projects!

🔗 Links

• npm package
• GitHub repository
• ascii-tree-generator

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Made with ❤️ by Maciej Popenda