LegalLens ⚖️

AI-Powered Legal Strategy Architect

LegalLens is a full-stack AI application designed to help legal professionals and individuals act as an intelligent co-pilot for structuring complex legal strategies. It features a split-view interface with a context-aware AI chat on the left and a live, structured plan document on the right.

Live Demo

Try the app here: https://legal-lens-ruby.vercel.app/

✨ Features

• Dual-Pane Workflow: Seamlessly switch between chatting and viewing your structured plan.
• Context-Aware AI: The AI "sees" your plan live. Ask "Change step 3" and it knows exactly what to do.
• Persistent Sessions: Your strategies and chat history are saved automatically.
• Secure Authentication: User registration and login with JWT and BCrypt security.
• Modern UI: Built with Svelte and Tailwind CSS for a premium, fast, and responsive experience.
• Scalable Backend: Powered by FastAPI and MongoDB (Motor/Beanie) for high performance.

🛠️ Tech Stack

Backend

• API Framework: FastAPI (Python 3.10+)
• Database: MongoDB Atlas
• ODM: Beanie (Async MongoDB ODM)
• AI: OpenAI GPT-4o (via streaming API)
• Testing: pytest + httpx
• Deployment: Render

Frontend

• Framework: Svelte + Vite
• Styling: Tailwind CSS
• State Management: Svelte Stores (built-in)

---

Getting Started

Prerequisites

• Node.js (v18+)
• Python (v3.10+)
• MongoDB Cluster (Free M0 Tier on Atlas is perfect)
• OpenAI API Key

Installation

1. Clone the repository

   git clone https://github.com/yourusername/legallens.git
   cd legallens

2. Setup Backend

   cd backend
   python -m venv venv
   source venv/bin/activate  # or venv\Scripts\activate on Windows
   pip install -r requirements.txt

3. Configure Environment Create a .env file in the backend/ directory:

   OPENAI_API_KEY=your_openai_key
   MONGODB_URL=your_mongodb_connection_string
   SECRET_KEY=your_random_secret_string
   DATABASE_NAME=legal_lens

4. Run Backend

   uvicorn main:app --reload
   # Server running at http://localhost:8000

5. Setup Frontend Open a new terminal:

   cd frontend
   npm install
   npm run dev
   # App running at http://localhost:5173

---

Deployment

You can see the running application here: https://legal-lens-ruby.vercel.app/

We recommend a Split Deployment strategy for the best free-tier performance:

1. Frontend: Deploy on Vercel (Free).
2. Backend: Deploy on Render (Free).
3. Database: Host on MongoDB Atlas (Free).

Read the Full Deployment Guide

Testing

Run the backend test suite to verify API and DB logic:

cd backend
pytest -v

License

MIT License.