| --- |
| tags: |
| - ml-intern |
| --- |
| # 🚀 CodeSync — Real-Time Collaborative Coding Platform |
|
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| <div align="center"> |
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| **A production-grade multiplayer code editor with AI assistance, video collaboration, and sandboxed execution.** |
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| [Live Demo](#) • [Documentation](./docs/ARCHITECTURE.md) • [Deployment Guide](./docs/DEPLOYMENT.md) |
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| </div> |
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| --- |
|
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| ## ✨ Features |
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| ### 🔄 Real-Time Collaboration |
| - **CRDT-based sync** (Yjs) — conflict-free concurrent editing |
| - **Cursor presence** — see where teammates are typing |
| - **Typing indicators** — know when someone is active |
| - **Optimistic updates** — instant local feedback, async server sync |
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| ### 📝 Monaco Editor |
| - VS Code-grade editing experience |
| - Multi-language syntax highlighting |
| - IntelliSense auto-completion |
| - File explorer + tab system |
| - Customizable themes (Dark, Light, High Contrast) |
| - Keyboard shortcuts (Ctrl+S, Ctrl+Z, etc.) |
|
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| ### 🏠 Rooms System |
| - Create/join coding rooms |
| - Shareable invite links |
| - Role-based access control (Owner / Editor / Viewer) |
| - Persistent room state across sessions |
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| ### 💬 Real-Time Chat |
| - Room messaging with typing indicators |
| - Code snippet sharing |
| - Emoji support |
| - Message persistence |
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| ### ⚡ Code Execution |
| - **Docker sandbox isolation** — secure execution |
| - Multi-language: JavaScript, Python, C++, Java |
| - Resource limits (CPU, memory, time) |
| - Real-time output streaming |
| - Network isolation (prevents malicious code) |
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| ### 📹 Video/Audio Calls |
| - WebRTC peer-to-peer connections |
| - Screen sharing |
| - Mute/unmute controls |
| - Connection quality indicators |
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| ### 🤖 AI Assistant |
| - Powered by OpenRouter (Gemini, GPT-4, Claude) |
| - Explain code / errors |
| - Suggest fixes |
| - Optimize performance |
| - Generate documentation |
| - Context-aware debugging |
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| ### 🔐 Authentication |
| - JWT-based auth (access + refresh tokens) |
| - Google OAuth integration |
| - Protected routes |
| - Session persistence |
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| --- |
|
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| ## 🏗️ Architecture |
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| ``` |
| ┌─────────────────────────────────────────────────────────────┐ |
| │ Client (Next.js 14) │ |
| │ Monaco Editor │ Socket.io │ WebRTC │ Zustand │ Tailwind │ |
| └───────────────────────────┬─────────────────────────────────┘ |
| │ WebSocket + REST |
| ┌───────────────────────────┴─────────────────────────────────┐ |
| │ Backend (Express + Socket.io) │ |
| │ REST API │ CRDT Engine │ WebRTC Signaling │ Execution Queue │ |
| └─────┬──────────────┬────────────────────────────┬───────────┘ |
| │ │ │ |
| ┌─────┴─────┐ ┌─────┴─────┐ ┌────────┴────────┐ |
| │ PostgreSQL │ │ Upstash │ │ Docker Sandboxes │ |
| │ (Supabase) │ │ Redis │ │ (Isolated) │ |
| └───────────┘ └───────────┘ └─────────────────┘ |
| ``` |
|
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| ### Key Design Decisions |
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| | Decision | Rationale | |
| |----------|-----------| |
| | **Yjs (CRDT)** over OT | No central authority needed; guaranteed convergence; used by Notion & JupyterLab | |
| | **Redis Pub/Sub** | Enables horizontal scaling without sticky sessions | |
| | **Zustand** over Redux | Less boilerplate, better TS support, sufficient for our needs | |
| | **Docker Isolation** | Security-first execution with resource limits and network isolation | |
| | **Upstash Redis** | Serverless-friendly, free tier, REST + pub/sub support | |
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| --- |
|
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| ## 🚀 Quick Start |
|
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| ### Prerequisites |
| - Node.js ≥ 20 |
| - pnpm ≥ 9 |
| - Docker (for code execution) |
| - PostgreSQL (or Docker) |
|
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| ### Setup |
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| ```bash |
| # Clone the repository |
| git clone https://github.com/yourusername/codesync.git |
| cd codesync |
| |
| # Install dependencies |
| pnpm install |
| |
| # Set up environment variables |
| cp apps/server/.env.example apps/server/.env |
| # Edit .env with your values |
| |
| # Start database |
| docker compose -f docker/docker-compose.yml up postgres redis -d |
| |
| # Run database migrations |
| cd apps/server && npx prisma migrate dev |
| |
| # Build sandbox images (for code execution) |
| cd ../../docker/sandboxes |
| docker build -t codesync-sandbox-js ./javascript |
| docker build -t codesync-sandbox-python ./python |
| |
| # Start development servers |
| cd ../.. |
| pnpm dev |
| ``` |
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| ### Access |
| - Frontend: http://localhost:3000 |
| - Backend: http://localhost:4000 |
| - API Health: http://localhost:4000/api/health |
|
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| --- |
|
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| ## 📁 Project Structure |
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| ``` |
| codesync/ |
| ├── apps/ |
| │ ├── web/ # Next.js 14 frontend |
| │ │ ├── src/ |
| │ │ │ ├── app/ # App Router pages |
| │ │ │ ├── components/ # React components |
| │ │ │ ├── hooks/ # Custom hooks (useSocket, useWebRTC, etc.) |
| │ │ │ ├── stores/ # Zustand state management |
| │ │ │ ├── lib/ # Utilities (CRDT, API, WebRTC) |
| │ │ │ └── types/ # TypeScript definitions |
| │ │ └── ... |
| │ └── server/ # Express backend |
| │ ├── src/ |
| │ │ ├── config/ # Environment, Redis, Database |
| │ │ ├── middleware/ # Auth, rate limiting, security |
| │ │ ├── routes/ # REST API endpoints |
| │ │ ├── services/ # Business logic |
| │ │ ├── socket/ # WebSocket handlers |
| │ │ └── utils/ # Helpers (JWT, logger, errors) |
| │ └── prisma/ # Database schema + migrations |
| ├── packages/ |
| │ └── shared/ # Shared types & constants |
| ├── docker/ # Docker configs + sandboxes |
| └── docs/ # Architecture & deployment docs |
| ``` |
|
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| --- |
|
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| ## 🔌 WebSocket Events |
|
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| | Event | Direction | Description | |
| |-------|-----------|-------------| |
| | `room:join` | Client → Server | Join a coding room | |
| | `room:joined` | Server → Client | Room data + initial state | |
| | `doc:update` | Client → Server | CRDT document delta | |
| | `doc:sync` | Server → Client | Broadcast delta to others | |
| | `cursor:move` | Client → Server | Cursor position update | |
| | `cursor:update` | Server → Client | Remote cursor positions | |
| | `chat:send` | Client → Server | Send chat message | |
| | `chat:message` | Server → Client | Broadcast message | |
| | `exec:run` | Client → Server | Execute code | |
| | `exec:output` | Server → Client | Streaming execution output | |
| | `webrtc:offer` | Client → Server | WebRTC SDP offer relay | |
| | `webrtc:answer` | Server → Client | WebRTC SDP answer relay | |
| | `webrtc:ice-candidate` | Both | ICE candidate exchange | |
|
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| --- |
|
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| ## 🔒 Security |
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|
| - **Docker Sandbox**: Network-disabled containers with CPU/memory limits |
| - **JWT Authentication**: Short-lived access tokens + refresh rotation |
| - **Rate Limiting**: Redis-backed distributed rate limiting |
| - **XSS Protection**: Input sanitization + Helmet headers |
| - **CORS**: Strict origin validation |
| - **Non-root Execution**: Sandbox containers run as unprivileged users |
|
|
| --- |
|
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| ## 📊 Performance |
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| - **CRDT Sync**: ~5ms latency for character-level updates |
| - **WebSocket**: Binary protocol for minimal overhead |
| - **Debounced Sync**: Batches rapid keystrokes before broadcast |
| - **Redis Caching**: Room metadata + recent messages cached |
| - **Optimistic UI**: Local changes applied instantly |
|
|
| --- |
|
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| ## 🛠️ Tech Stack |
|
|
| | Layer | Technology | |
| |-------|-----------| |
| | Frontend | Next.js 14, TypeScript, Tailwind CSS | |
| | Editor | Monaco Editor (VS Code engine) | |
| | State | Zustand | |
| | Real-time | Socket.io, Yjs (CRDT) | |
| | Video | WebRTC | |
| | Backend | Node.js, Express | |
| | Database | PostgreSQL (Prisma ORM) | |
| | Cache | Upstash Redis | |
| | Execution | Docker containers | |
| | AI | OpenRouter (multi-model) | |
| | Auth | JWT + Google OAuth | |
| | Deploy | Vercel + Railway | |
|
|
| --- |
|
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| ## 📈 Scalability |
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| The architecture supports horizontal scaling out of the box: |
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| 1. **Multiple server instances** share state via Redis pub/sub |
| 2. **No sticky sessions** required — any instance can handle any request |
| 3. **CRDT convergence** guarantees consistency without coordination |
| 4. **Connection pooling** via PgBouncer for database efficiency |
| 5. **Queue-based execution** prevents overload during high traffic |
|
|
| --- |
|
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| ## 🤝 Contributing |
|
|
| 1. Fork the repository |
| 2. Create a feature branch (`git checkout -b feature/amazing-feature`) |
| 3. Commit your changes (`git commit -m 'Add amazing feature'`) |
| 4. Push to the branch (`git push origin feature/amazing-feature`) |
| 5. Open a Pull Request |
|
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| --- |
|
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| ## 📄 License |
|
|
| MIT License — see [LICENSE](./LICENSE) for details. |
|
|
| --- |
|
|
| <div align="center"> |
| <b>Built with ❤️ demonstrating distributed systems, real-time sync, and collaborative architecture.</b> |
| </div> |
|
|
| <!-- ml-intern-provenance --> |
| ## Generated by ML Intern |
|
|
| This model repository was generated by [ML Intern](https://github.com/huggingface/ml-intern), an agent for machine learning research and development on the Hugging Face Hub. |
|
|
| - Try ML Intern: https://smolagents-ml-intern.hf.space |
| - Source code: https://github.com/huggingface/ml-intern |
|
|
| ## Usage |
|
|
| ```python |
| from transformers import AutoModelForCausalLM, AutoTokenizer |
| |
| model_id = 'myagent10101/codesync-collaborative-platform' |
| tokenizer = AutoTokenizer.from_pretrained(model_id) |
| model = AutoModelForCausalLM.from_pretrained(model_id) |
| ``` |
|
|
| For non-causal architectures, replace `AutoModelForCausalLM` with the appropriate `AutoModel` class. |
|
|
