⚖️ Veritas - Fact Check Copilot

A rigorous AI fact-checking assistant powered by GitHub Copilot SDK.

Features

• 📰 Clean, professional journalism-inspired UI
• ✍️ Typography: Merriweather (serif) for content, Inter (sans) for UI
• 🔍 Fact-checking with structured verdicts (True/False/Mixed/Unverified)
• 📊 Confidence indicators and evidence citations
• 🌐 URL input support for fact-checking article content
• 💾 Persistent model selection via localStorage

Prerequisites

• Python 3.11+
• Node.js 18+
• GitHub Copilot CLI - Install guide

Quick Start

1. Start the Backend

cd backend

# Create virtual environment (first time only)
python -m venv venv

# Activate venv
.\venv\Scripts\activate    # Windows
source venv/bin/activate   # Linux/Mac

# Install dependencies
pip install -r requirements.txt

# Run server
uvicorn main:app --reload --port 8000

2. Start the Frontend

cd frontend

# Install dependencies (first time only)
npm install

# Run dev server
npm run dev

3. Open Veritas

Navigate to http://localhost:5173 ⚖️

Testing

# Backend tests
cd backend
.\venv\Scripts\activate
pytest tests/ -v

# Frontend tests
cd frontend
npm test

# E2E tests
cd frontend
npx playwright install  # first time
npx playwright test

Project Structure

veritas/
├── backend/
│   ├── main.py              # FastAPI server
│   ├── copilot_service.py   # Copilot SDK wrapper
│   ├── mock_copilot.py      # Mock for testing
│   └── models.py            # Pydantic schemas
└── frontend/
    ├── src/
    │   ├── App.jsx          # Main app
    │   ├── index.css        # Professional styling
    │   └── components/      # React components
    └── e2e/                 # Playwright tests

Environment Variables

Set USE_MOCK_SDK=true for development without Copilot CLI.

License

MIT