📋 CopyToLLM

Extract Rails error information with one click for efficient AI debugging

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🚀 What is CopyToLLM?

CopyToLLM is a Chrome extension that extracts key debugging information from Rails error pages with a single click, formatted perfectly for AI assistants like Claude, ChatGPT, and others.

Instead of copying entire error pages that waste tokens and confuse AI models, this extension intelligently extracts only the essential information needed for debugging.

⚡

One-Click Extraction

Simply click the floating button to extract and copy error information to your clipboard

🎯

Smart Filtering

Extracts only relevant information: error type, file location, message, code context, and stack trace

🔧

Multiple Error Types

Works with standard Rails errors, Better Errors gem, and ActionView template errors

🛡️

Local Development Only

Restricted to localhost and local IP ranges for security

🔧 Installation

Download Extension

Clone or download the extension files from the GitHub repository

Open Chrome Extensions

Navigate to chrome://extensions/ in your browser

Enable Developer Mode

Toggle "Developer mode" in the top right corner

Load Extension

Click "Load unpacked" and select the extension directory

📖 How to Use

Encounter a Rails Error: When you hit a Rails error page during local development
Click the Button: Look for the floating "📋 Copy to LLM" button in the bottom right
Paste to AI: The formatted error information is now in your clipboard - paste it into your AI assistant

Example Output

Rails Error: NoMethodError
File: app/controllers/users_controller.rb:15
Message: undefined method `confirmed?' for nil:NilClass

Code Context:
13:     def show
14:       @user = User.find(params[:id])
15:   >   if @user.confirmed?  # <-- ERROR HERE
16:         render :show
17:       else

Stack Trace:
- app/controllers/users_controller.rb:15:in `show'
- app/middleware/auth.rb:12:in `call'

URL: http://localhost:3000/users/123

🎬 See It In Action

Here's how CopyToLLM works with different types of Rails errors:

✅ Supported Error Types

NoMethodError
NameError / UnknownAttributeError
ActionView::MissingTemplate
ArgumentError (callback not defined)
Routing errors
Template rendering errors

⚙️ Technical Details

Security Features

Local Development Only: Extension only activates on localhost, 127.0.0.1, and private IP ranges
Minimal Permissions: Only requires clipboard access and active tab permission
No External Requests: All processing happens locally in your browser

Compatibility

Rails Versions: Works with Rails 5.x, 6.x, and 7.x
Error Gems: Compatible with Better Errors, standard Rails error pages
Browsers: Chrome, Chromium, and other Chromium-based browsers

File Structure

copy-to-llm/
├── manifest.json      # Extension configuration
├── content.js         # Main extraction logic
├── styles.css         # Button styling
├── icon16.png         # Extension icons
├── icon48.png
├── icon128.png
└── README.md          # Documentation

🤝 Contributing

Contributions are welcome! Here's how you can help:

Bug Reports: Found an error type that isn't extracted properly? Open an issue!
Feature Requests: Ideas for improving the extraction or adding support for other frameworks
Code Contributions: Submit PRs for bug fixes or new features
Documentation: Help improve this documentation or add examples

The extension is open source and available on GitHub. Feel free to fork, modify, and submit pull requests!

🚀 Coming Soon

We're working on expanding CopyToLLM to support more frameworks and error types:

⚛️

React/Next.js

JavaScript error extraction

🌐

Nginx

Server error log parsing

🐍

Django/Flask

Python error extraction

🔥

Laravel

PHP error handling

Want to help? Contribute to these features or suggest other frameworks on GitHub Issues!