Hover over code on any webpage to see documentation. Like your IDE, but everywhere.

Works on documentation sites and AI chat apps like ChatGPT and Claude.

Install from Chrome Web Store

1. Build the extension:

bun install && bun run build

2. Load in Chrome: Navigate to chrome://extensions → Enable Developer Mode → Load Unpacked → Select the dist_chrome folder

Click the extension icon, go to Settings, and add your OpenRouter API key or configure a custom OpenAI client compatible endpoint.

Set which websites the extension runs on using URL patterns (e.g. *://*.github.com/*).

bun run dev      # Dev server
bun run build    # Production build and lint
bun run lint     # Lint
bun run format   # Format
bun run package  # Build and create hover-extension.zip for Chrome Web Store

Optional: Create .env to bundle an API key into dev builds:

VITE_OPEN_ROUTER_API_KEY=your-key

See scripts/README.md for evaluation tools.

See TASKS.md for a list of known issues and planned improvements.

See PRIVACY.md for details on data handling.

MIT