A repository exploration tool that extracts and displays the complete contents of public Git repositories or local ZIP files. Built with Next.js and FastAPI, it provides syntax-highlighted code browsing with efficient handling of large repository structures.

• Virtual rendering with Intersection Observer API and requestAnimationFrame for performant scrolling through large codebases
• Syntax highlighting via Prism.js with support for 10+ languages
• Async file operations using aiofiles for non-blocking I/O
• CORS and compression middleware with conditional GZip encoding
• Request correlation through custom middleware that generates and propagates unique request IDs for tracing
• Structured logging with JSON-serialized events including performance metrics
• Binary file detection with heuristic sampling to distinguish text from binary content
• URL validation and normalization for Git repositories with allowlist-based host verification

• Frontend: Next.js 14 with React 18 and TypeScript 5, styled with Tailwind CSS 3
• Syntax highlighting: Prism.js 1.30 with 10+ language supports
• UI utilities: clsx for conditional className composition
• Fonts: Inter and Space Grotesk via Google Fonts with font-display swap
• Backend: FastAPI 0.125 with Uvicorn ASGI and Gunicorn production server
• Async HTTP: httpx for async Git operations
• Validation: Pydantic BaseModel for request/response schemas
• Token counting: tiktoken for estimating content size against context limits

├── frontend/
│   ├── app/
│   │   ├── page.tsx          # Main repository explorer component
│   │   ├── layout.tsx        # Root layout with font setup
│   │   ├── error.tsx         # Error boundary wrapper
│   │   └── globals.css       # Global styles
│   ├── components/
│   │   └── ErrorBoundary.tsx # Error fallback component
│   ├── next.config.js        # Next.js configuration
│   ├── tailwind.config.js    # Custom design tokens
│   └── tsconfig.json         # TypeScript strict mode
├── backend/
│   ├── main.py               # FastAPI application
│   ├── gunicorn.conf.py      # Production WSGI config
│   ├── requirements.txt       # Python dependencies
│   └── tests/
│       └── test_healthz.py   # Health check tests
└── .gitignore               # Git exclusions for Node/Python

frontend/app/ - Next.js App Router pages with server/client boundary. The page.tsx implements virtual list rendering for efficient browsing of large repository structures with live syntax highlighting.

backend/ - FastAPI routes for repository extraction. Handles Git cloning with timeout protection, ZIP extraction with size limits, and file content retrieval with token counting for language models.