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/\u003e\n\n[![Next.js](https://img.shields.io/badge/Next.js-15-black)](https://nextjs.org/)\n[![React](https://img.shields.io/badge/React-18-blue)](https://reactjs.org/)\n[![TailwindCSS](https://img.shields.io/badge/TailwindCSS-3-06B6D4)](https://tailwindcss.com/)\n[![WebGPU](https://img.shields.io/badge/WebGPU-Enabled-green)](https://developer.chrome.com/docs/web-platform/webgpu/)\n\nA real-time 3D street communication platform that allows users to chat and interact in a virtual street environment.\n\n![Street Chat Demo](public/demo.png)\n\n## Features\n\n- 🌍 Real-time 3D street view chat rooms\n- 💬 Real-time messaging with Firebase\n- 👤 Anonymous chat mode\n- 🤖 Local AI chat powered by WebGPU acceleration\n- 🧠 On-device LLM inference with web-llm\n- 📱 PWA support for mobile devices\n- 🔒 Google authentication\n- 🎨 Three.js powered 3D rendering\n\n## AI Chat Features\n\n- 💻 Browser-based LLM inference\n- 🚀 WebGPU acceleration for faster responses\n- 🔒 Privacy-focused: all processing happens locally\n- 📥 One-time model download\n- ⚡ No server calls needed for AI responses\n\n## Anonymous Chat Features\n\n- 🎭 No login required for quick access\n- 🔄 Randomly generated avatar and username\n- 💫 Seamless transition between anonymous and logged-in modes\n- 🤝 Join any public chat room anonymously\n\n## Tech Stack\n\n- **Frontend**: Next.js 15, React, TypeScript\n- **Styling**: Tailwind CSS\n- **3D Rendering**: Three.js\n- **Maps**: Mapillary\n- **Database**: Firestore\n- **Authentication**: Firebase\n- **Deployment**: Vercel\n\n## Getting Started\n\nFirst, run the development server:\n\n```bash\nnpm run dev\n# or\nyarn dev\n# or\npnpm dev\n# or\nbun dev\n```\n\nOpen [http://localhost:3000](http://localhost:3000) with your browser to see the result.\n\n## Environment Variables\n\nCopy the `.env.example` file to `.env.local` and update the variables:\n\n```env\nNEXT_PUBLIC_MAPILLARY_ACCESS_TOKEN=\nNEXT_PUBLIC_FIREBASE_KEY=\nNEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=\nNEXT_PUBLIC_FIREBASE_PROJECT_ID=\nNEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=\nNEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID=\nNEXT_PUBLIC_FIREBASE_APP_ID=\nNEXT_PUBLIC_FIREBASE_MEASUREMENT_ID=\nNEXT_PUBLIC_BASE_URL=\n```\n\n## Contributing\n\n1. 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