A Chrome extension that lets you send the same query to ChatGPT, Claude, and Gemini simultaneously.

• Submit queries to multiple AI providers simultaneously

• React 19 - UI framework for side panel and options page
• TypeScript - Type-safe development
• Vite - Build tool with CRXJS plugin for Chrome extension bundling
• Vitest - Testing framework with Testing Library and Puppeteer for E2E

src/
├── background/          # Service worker (Manifest v3)
│   ├── query-orchestrator.ts   # Manages parallel query submission
│   ├── tab-manager.ts          # Tracks provider tabs
│   └── message-handler.ts      # Routes extension messages
├── content-scripts/     # Injected into AI provider websites
│   ├── base-adapter.ts         # Abstract provider interface
│   └── providers/              # ChatGPT, Claude, Gemini adapters
├── sidepanel/           # Main UI for query input and responses
├── options/             # User preferences page
└── shared/              # Types, constants, and utilities

Key patterns:

• Message-based communication between background service worker and content scripts
• Provider adapter pattern abstracts differences between AI provider UIs
• Query orchestrator handles parallel submissions and response collection

npm install
npm run build

Then load the /dist folder as an unpacked extension in Chrome.

npm run dev      # Start dev server
npm run build    # Production build
npm run test     # Run tests

You must be logged into each AI provider's website (ChatGPT, Claude, Gemini) for the extension to work with that provider.