HKUDS/Litewrite

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<img src="public/logo.svg" alt="Litewrite Logo" width="120" /> <h1 align="center">✍️ Vibe Writing is Coming — Write Faster and Better!</h1> Litewrite: AI-Powered Collaborative LaTeX Writing Platform <a href="https://github.com/hkuds/litewrite"><img src="https://img.shields.io/badge/version-1.0.7-blue.svg" alt="Version" /></a> <a href="./LICENSE"><img src="https://img.shields.io/badge/license-AGPL--3.0-blue.svg" alt="License" /></a> <a href="https://github.com/hkuds/litewrite/actions"><img src="https://img.shields.io/github/actions/workflow/status/hkuds/litewrite/ci.yaml?branch=main&label=CI" alt="CI" /></a> <img src="https://img.shields.io/badge/TypeScript-5.x-3178C6?logo=typescript&logoColor=white" alt="TypeScript" /> <img src="https://img.shields.io/badge/Next.js-14-black?logo=next.js" alt="Next.js" /> <img src="https://img.shields.io/badge/Python-3.12-3776AB?logo=python&logoColor=white" alt="Python" /> <img src="https://img.shields.io/badge/Docker-Ready-2496ED?logo=docker&logoColor=white" alt="Docker" /> <a href="https://discord.gg/M88Y27DDEe"><img src="https://img.shields.io/badge/💬Discord-Community-7289da?style=for-the-badge&logo=discord&logoColor=white&labelColor=1a1a2e"></a> <a href="https://github.com/HKUDS/Litewrite/issues/4"><img src="https://img.shields.io/badge/💬WeChat-Group-07c160?style=for-the-badge&logo=wechat&logoColor=white&labelColor=1a1a2e"></a> <a href="https://litewrite.ai"><img src="https://img.shields.io/badge/🌐_Live_Demo-litewrite.ai-ff6b6b?style=for-the-badge" alt="Demo" /></a> <a href="#-news">News</a> • <a href="#-features">Features</a> • <a href="#-screenshots">Screenshots</a> • <a href="#%EF%B8%8F-architecture">Architecture</a> • <a href="#-ai-features">AI Features</a> • <a href="#-nanobot--chat-platform-integration">nanobot</a> • <a href="#-quick-start">Quick Start</a> • <a href="#-contributing">Contributing</a> --- <div align="center"> Try Litewrite: (https://litewrite.ai/) </div> ## 📰 News - **2026-02-10** 🤖 **[nanobot × Litewrite](https://github.com/HKUDS/nanobot) — nanobot empowers your vibe writing ([setup guide](nanobot/DEPLOYMENT.md)) - **2026-02-03** 🎉 **Litewrite v1.0.7** — Real-time collaboration, LaTeX compilation & AI chat. --- ## ✨ Features 🚀 **TAP Smart Completion** — Type a few words, AI continues writing for you. Just hit Tab and you're all set! 💬 **ASK Mode** — Summon your AI assistant anytime. Grammar issues? Format problems? Just ask! 🤖 **Agent Mode** — The ultimate hands-off writing experience! AI automatically edits, polishes, formats! 🔍 **Deep Research** — AI conducts in-depth research and auto-generates reports. Research while you write! 📱 **[nanobot](https://github.com/HKUDS/nanobot)** — Chat with your projects from IM apps. Compile, edit, and manage — all from your phone! --- <img src="public/screenshots/nanobot-demo.gif" alt="nanobot Demo — Chat with your projects from Telegram" width="720" /> 💬 Chat with your projects from IM apps --- ## 📸 Screenshots <details> <summary>Click to expand screenshots</summary> #### 🏠 Landing Page <img src="public/screenshots/landing.png" alt="Landing Page" width="800" /> AI-integrated vibe writing — lite, fast, effortless #### 📚 Template Gallery <img src="public/screenshots/templates.png" alt="Template Gallery" width="800" /> 10+ pre-built templates: NeurIPS, ACM, Beamer, CV, Thesis, and more #### 🔣 Symbol Panel <img src="public/screenshots/symbols.png" alt="Symbol Panel" width="500" /> Quick insert Greek letters, math operators, and LaTeX constructs #### 📖 Reference Search <img src="public/screenshots/references.png" alt="Reference Search" width="600" /> Search and insert BibTeX citations with fuzzy matching #### 📜 Version History <img src="public/screenshots/history.png" alt="Version History" width="800" /> Create snapshots, compare diffs, and restore any previous version #### 🔗 Project Sharing <img src="public/screenshots/share.png" alt="Share Project" width="400" /> Share via link or invite collaborators by email </details> > 💡 **Try it yourself:** Visit [litewrite.ai](https://litewrite.ai) for the live demo! --- ## 🏗️ Architecture Litewrite is a microservices architecture with 6 core services communicating over a Docker network. <img src="public/Architecture.png" alt="Litewrite Architecture" width="800" /> | Service | Port | Technology | Role | |---------|------|------------|------| | 🌐 **Next.js** | 3000 | TypeScript, React | Web app, API routes, auth, project management | | 🔄 **WebSocket** | 1234 | Node.js, Yjs | Real-time collaboration, document sync, chat rooms | | 🧠 **AI Server** | 6612 | Python, FastAPI | TAP completion, Chat Agent, Deep Research | | 📄 **Compile** | 3002 | Node.js, TeXLive | LaTeX compilation (pdfLaTeX/XeLaTeX/LuaLaTeX) | | 🤖 **nanobot** | — | Python, LiteLLM | Telegram/Feishu bot, Litewrite project operations | | ⚡ **Redis** | 6379 | Redis | Yjs persistence, rate limiting, caching | > 🔒 All internal service-to-service communication is authenticated via `X-Internal-Secret` header. --- ## 🧠 AI Features Litewrite's AI capabilities are powered by a modular Agent system built on Python FastAPI. The architecture follows a **MainAgent + SubAgent** orchestration pattern with a unified Tool layer. <img src="public/AIServer.png" alt="Litewrite AI Architecture" width="800" /> ### ⚡ TAP Completion (Type-Ahead Prediction) Ghost-text AI completion as you type, similar to GitHub Copilot. | Stage | Description | |-------|-------------| | **Input** | `prefix` (text before cursor) + `suffix` (text after cursor) | | **Processing** | Boundary extraction → Scenario detection → LLM inference | | **Output** | Action type (`insert` / `complete_word` / `fix` / `skip`) + suggested text | | **Post-processing** | Boundary fixups → Diff computation → Frontend rendering | ### 🤖 Agent System (Ask & Agent Mode) The Agent system uses a **ReAct-style** loop with tool calling for complex writing tasks. <img src="public/MainAgent.png" alt="Litewrite Main Agent Architecture" width="800" /> **Mode-based Tool Availability:** | Tool | Ask Mode | Agent Mode | Description | |------|:--------:|:----------:|-------------| | `read_file` | ✅ | ✅ | Read file content with line ranges | | `list_files` | ✅ | ✅ | List project files and structure | | `web_search` | ✅ | ✅ | Search the web for information | | `arxiv_search` | ✅ | ✅ | Search arXiv papers with RAG | | `plan` | ✅ | ✅ | Generate step-by-step plan | | `done` | ✅ | ✅ | Signal task completion | | `edit_file` | — | ✅ | Edit file with diff preview | | `task` | — | ✅ | Delegate to SubAgent | **Context Management:** - 📦 Session history limit: 64K tokens (configurable) - 📦 Execution context limit: 64K tokens (configurable) - 🔄 Automatic LLM-based compression when threshold (95%) is exceeded - 🛡️ Shadow documents for safe edit preview (or direct-apply for trusted callers) ### 🔍 Deep Research Multi-source research with automatic report generation. <img src="public/DeepResearch.png" alt="Litewrite Deep Research" width="800" /> ### 🔧 Unified Tool Layer All tools inherit from a base `Tool` class with standardized interfaces: ```python class Tool(ABC): name: str # Tool identifier description: str # LLM-readable description parameters: dict # JSON Schema for parameters mode: ToolMode # ask / agent / all async def execute(params, context) -> ToolResult ``` The `ToolContext` provides: - 📋 Project and user information - 📡 SSE event emitter for real-time frontend updates - 🔓 `direct_apply` flag for trusted callers (bypasses shadow documents) - 📊 Shared usage accumulator for token tracking --- ## 📱 [nanobot](https://github.com/HKUDS/nanobot) — Chat Platform Integration [nanobot](https://github.com/HKUDS/nanobot) is an AI assistant that connects messaging platforms (Telegram, Feishu/Lark) to Litewrite, enabling users to manage LaTeX projects through natural language conversations. > 📖 For detailed setup instructions, see the [nanobot Deployment Guide](nanobot/DEPLOYMENT.md).  <img src="public/nanobot.png" alt="Litewrite nanobot Architecture" width="800" /> ### 🛠️ Key Capabilities nanobot provides **20 Litewrite tools** for comprehensive project management: | Category | Tools | |----------|-------| | 🎯 **Core** | List projects, invoke Litewrite AI agent, compile to PDF | | 📁 **File Operations** | List, read, edit, create, rename, delete, upload files | | 📦 **Project Management** | Create, delete, rename projects | | 📜 **Version Control** | List, save, restore versions | | 📥 **Import** | Import from arXiv, GitHub/GitLab, or file upload | ### ⚙️ How It Works 1. 💬 User sends a message in Telegram or Feishu 2. 🧠 nanobot's agent processes the message with LLM reasoning 3. 🔧 Agent decides which Litewrite tools to call 4. 🔐 Tools communicate with Litewrite via Internal API (`X-Internal-Secret`) 5. 📤 Results (text, PDF, etc.) are sent back to the chat platform ### 💾 Session Management - 🔗 Per-project session cache: consecutive calls reuse the same conversation - 👁️ Sessions appear in the Litewrite web UI as **"nanobot"** conversations - 🤝 The `litewrite_agent` tool delegates complex tasks to Litewrite's built-in AI agent, combining nanobot's chat interface with Litewrite's full editing capabilities --- ## 🚀 Quick Start ### Prerequisites - [Docker Desktop](https://www.docker.com/products/docker-desktop/) (includes Docker Compose) - 8GB+ RAM recommended (TeXLive image is ~5GB) ### Development Setup ```bash # Clone the repository git clone https://github.com/hkuds/litewrite.git cd litewrite # Start with one command ./scripts/up-dev.sh ``` This will: 1. Create `.env` from `env.example.oss` if missing 2. Pull/build all Docker images 3. Start the full stack (web, ws, ai-server, compile, minio, redis) ### 🔗 Access Points | Service | URL | Description | |---------|-----|-------------| | 🌐 **App** | http://localhost:3000 | Main application | | 📦 **MinIO** | http://localhost:9001 | Object storage console (`minioadmin`/`minioadmin`) | | 🧠 **AI Server** | http://localhost:6612/health | AI services health check | | 📄 **Compile** | http://localhost:3002/health | LaTeX compile service | ### 🏭 Production Deployment ```bash # With custom env files ./scripts/up-prod.sh --env-file .env.production --env-file .env.secrets ``` <details> <summary>📋 Required Environment Variables</summary> | Variable | Description | |----------|-------------| | `NEXTAUTH_SECRET` | Random string for session encryption | | `INTERNAL_API_SECRET` | Internal service authentication | | `DATABASE_URL` | PostgreSQL connection string | | `S3_BUCKET` | S3 bucket name | | `S3_REGION` | S3 region | | `S3_ACCESS_KEY_ID` | S3 access key | | `S3_SECRET_ACCESS_KEY` | S3 secret key | | `OPENROUTER_API_KEY` | AI service API key | See `env.example.oss` for the complete configuration reference. </details> --- ## 🛠 Tech Stack <table> <tr> <td> ### 🎨 Frontend - **Framework:** Next.js 14 (App Router) - **Language:** TypeScript 5 - **Editor:** CodeMirror 6 + y-codemirror.next - **UI:** Tailwind CSS + Shadcn UI </td> <td> ### ⚙️ Backend - **API:** Next.js API Routes - **ORM:** Prisma - **Auth:** NextAuth.js 5 - **Collaboration:** Yjs + y-websocket </td> </tr> <tr> <td> ### 🧠 AI Services - **AI Server:** Python FastAPI - **LLM:** OpenRouter (multi-model) - **[nanobot](https://github.com/HKUDS/nanobot):** Python + LiteLLM - **Channels:** Telegram, Feishu/Lark </td> <td> ### 🏗️ Infrastructure - **Database:** SQLite (dev) / PostgreSQL (prod) - **Cache:** Redis - **Storage:** S3-compatible (MinIO/AWS) - **LaTeX:** TeXLive (pdfLaTeX, XeLaTeX, LuaLaTeX) - **Container:** Docker + Docker Compose </td> </tr> </table> --- ### ✏️ Editor Experience | Feature | Description | |---------|-------------| | 📝 **LaTeX Editor** | Built on CodeMirror 6 with syntax highlighting, smart completion, bracket matching, and folding | | 📄 **Markdown Editor** | Full GFM support with code highlighting, math rendering (KaTeX), and live preview | | 👁️ **Visual Editing** | Typora-like WYSIWYG: renders content while editing, shows source at cursor position | | 📂 **Multi-file Projects** | Organize large documents with `\input{}`, `\include{}`, and proper file tree management | ### 🤖 AI-Powered Writing | Feature | Description | |---------|-------------| | ⚡ **TAP Completion** | Ghost-text AI completion as you type (Cursor/Copilot-like experience) | | 💬 **Ask AI** | Select text and ask AI to explain, improve, translate, or rewrite | | 🤖 **Agent Mode** | Full autonomous editing — AI reads, plans, and applies multi-file edits | | 🔍 **Deep Research** | Multi-iteration research: web + arXiv search, structured report generation with BibTeX | | 📊 **AI Table** | Generate LaTeX tables from natural language descriptions | | 📱 **[nanobot](https://github.com/HKUDS/nanobot)** | Manage projects from Telegram/Feishu: edit files, compile PDFs, import papers | ### 👥 Collaboration & Sharing | Feature | Description | |---------|-------------| | 🔄 **Real-time Collaboration** | Multiple users editing simultaneously with cursor presence indicators | | 📜 **Version History** | Create snapshots, compare diffs, and restore any previous version | | 🔗 **Sharing** | Share projects via link with granular view/edit permissions | ### 📄 Compilation & Preview | Feature | Description | |---------|-------------| | 🔧 **Multiple Engines** | pdfLaTeX, XeLaTeX, LuaLaTeX with full TeXLive distribution | | 👁️ **Live Preview** | Auto-compile on save with instant PDF preview | | 🔀 **SyncTeX** | Bi-directional navigation: click PDF to jump to source, click source to highlight PDF | | 📦 **Export Options** | Download PDF, source ZIP, or individual files | --- ## 📁 Project Structure ``` litewrite/ ├── app/ # Next.js App Router pages & API routes │ ├── api/ # REST API + Internal API endpoints │ ├── editor/ # Editor page │ └── (home)/ # Dashboard pages ├── components/ # React components │ ├── editor/ # Editor-specific components │ ├── pdf-viewer/ # PDF preview components │ └── ui/ # Shadcn UI components ├── lib/ # Shared utilities ├── prisma/ # Database schema & migrations │ ├── server/ # WebSocket collaboration server │ ├── ws-server.ts # Yjs WebSocket + HTTP endpoints │ └── yjs-persistence.ts # Redis-based Yjs persistence │ ├── ai-server/ # AI service (Python FastAPI) │ ├── api/ # Chat, TAP, Deep Research endpoints │ ├── services/ # Service implementations │ │ ├── chat_1_5/ # Agent system (MainAgent + SubAgents) │ │ ├── tap/ # TAP completion service │ │ └── deep_research/ # Multi-iteration research │ ├── tools/ # Agent tools (read, edit, search, etc.) │ └── core/ # Config, LLM client, caching │ ├── compile-server/ # LaTeX compilation service │ ├── nanobot/ # Chat platform AI assistant │ └── nanobot/ │ ├── agent/ # LLM agent loop + 20 Litewrite tools │ ├── channels/ # Telegram, Feishu, WhatsApp adapters │ ├── bus/ # Async message bus │ ├── config/ # Environment-based configuration │ └── skills/ # Extensible skill system │ ├── docker-compose.yml # Development configuration ├── docker-compose.prod.yml # Production configuration └── scripts/ # Setup & deployment helpers ``` --- ## 🔧 Development ### Common Commands ```bash # Start development environment docker compose up # Start in background docker compose up -d # View logs docker compose logs -f web docker compose logs -f ai-server docker compose logs -f nanobot # Rebuild specific service docker compose up --build web # Reset database docker compose exec web npx prisma migrate reset # Run TypeScript check npm run typecheck ``` ### 🔥 Hot Reload | Directory | Service | Auto-reload | |-----------|---------|-------------| | `app/`, `components/`, `lib/` | Next.js | ✅ | | `server/` | WebSocket | ✅ | | `ai-server/` | AI Server | ✅ | | `nanobot/` | nanobot | ✅ | | `compile-server/` | Compile | ❌ (rebuild needed) | --- ## ⚙️ Environment Variables <details> <summary>📋 Click to expand full list</summary> ### Core | Variable | Description | Default | |----------|-------------|---------| | `NEXTAUTH_SECRET` | NextAuth encryption secret | (required) | | `INTERNAL_API_SECRET` | Internal service auth | (required) | | `DATABASE_URL` | Database connection | `file:./dev.db` | ### AI Providers | Variable | Description | Default | |----------|-------------|---------| | `OPENROUTER_API_KEY` | LLM API key (required for AI features) | — | | `OPENROUTER_API_KEYS` | Multiple keys for rotation | — | | `OPENROUTER_KEY_STRATEGY` | Key rotation: `round_robin`, `random`, `least_used` | `round_robin` | | `LLM_MODEL` | Default LLM model | `google/gemini-3-flash-preview` | | `EMBEDDING_API_BASE` | Embedding API URL | `https://openrouter.ai/api/v1` | | `EMBEDDING_API_KEY` | Embedding API key | — | | `EMBEDDING_MODEL` | Embedding model | `text-embedding-3-small` | | `SERPER_API_KEY` | Web search (for Deep Research) | — | ### nanobot | Variable | Description | Default | |----------|-------------|---------| | `TELEGRAM_ENABLED` | Enable Telegram bot | `false` | | `TELEGRAM_BOT_TOKEN` | Telegram bot token from @BotFather | — | | `FEISHU_ENABLED` | Enable Feishu bot | `false` | | `FEISHU_APP_ID` | Feishu app ID | — | | `FEISHU_APP_SECRET` | Feishu app secret | — | | `NANOBOT_DEFAULT_LITEWRITE_USER_ID` | Litewrite user UUID for project ownership | — | ### Storage | Variable | Description | Default | |----------|-------------|---------| | `STORAGE_PROVIDER` | `s3` or `local` | `s3` | | `S3_ENDPOINT` | S3 endpoint URL | `http://localhost:9000` | | `S3_BUCKET` | S3 bucket name | `litewrite` | | `S3_REGION` | S3 region | `us-east-1` | | `S3_ACCESS_KEY_ID` | S3 access key | — | | `S3_SECRET_ACCESS_KEY` | S3 secret key | — | ### Optional | Variable | Description | Default | |----------|-------------|---------| | `REDIS_URL` | Redis URL (enables Yjs persistence + rate limiting) | — | | `NEXT_PUBLIC_WS_URL` | Public WebSocket URL for clients | `ws://localhost:1234` | | `TAP_MODEL` | Override model for TAP completion | (uses `LLM_MODEL`) | > 📄 See `env.example.oss` for the complete template. </details> --- ## 🤝 Contributing We welcome contributions! Please see our [Contributing Guide](./CONTRIBUTING.md) for details. ```bash # Quick contribution workflow git clone https://github.com/hkuds/litewrite.git cd litewrite git checkout -b feature/your-feature # Make your changes git commit -m "feat: add amazing feature" git push origin feature/your-feature # Open a Pull Request ``` ### Contributors <a href="https://github.com/HKUDS/litewrite/graphs/contributors"> <img src="https://contrib.rocks/image?repo=HKUDS/litewrite&max=100&columns=12&updated=20260210" alt="Contributors" /> </a> --- ## 🙏 Acknowledgments Litewrite is built on the shoulders of giants: - [Next.js](https://nextjs.org/) — React framework - [CodeMirror](https://codemirror.net/) — Code editor - [Yjs](https://yjs.dev/) — CRDT for collaboration - [Prisma](https://www.prisma.io/) — Database ORM - [TeXLive](https://tug.org/texlive/) — TeX distribution - [Shadcn UI](https://ui.shadcn.com/) — UI components - [OpenRouter](https://openrouter.ai/) — LLM routing - [LiteLLM](https://github.com/BerriAI/litellm) — LLM provider abstraction - [nanobot](https://github.com/HKUDS/nanobot) — Ultra-lightweight AI assistant --- ## ⭐ Star History <div align="center"> <a href="https://star-history.com/#HKUDS/litewrite&Date"> <picture> <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/svg?repos=HKUDS/litewrite&type=Date&theme=dark" /> <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/svg?repos=HKUDS/litewrite&type=Date" /> <img alt="Star History Chart" src="https://api.star-history.com/svg?repos=HKUDS/litewrite&type=Date" style="border-radius: 15px; box-shadow: 0 0 30px rgba(0, 217, 255, 0.3);" /> </picture> </a> </div> Thanks for visiting ✨ litewrite! <img src="https://visitor-badge.laobi.icu/badge?page_id=HKUDS.litewrite&style=for-the-badge&color=00d4ff" alt="Views"> <a href="https://github.com/hkuds/litewrite/stargazers">⭐ Star us on GitHub!</a>

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Manage LaTeX projects in Litewrite - use the built-in AI agent for all writing/editing/analysis, manage projects and versions, compile to PDF, and upload binary assets.

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2026-02-09

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