AI Code Generator

Full-stack code generation platform. Describe what you want, get production-ready code with tests and docs.

What It Does

Generates code in 10 languages (Python, JavaScript, TypeScript, Java, C#, Go, Rust, C++, Ruby, Swift) using OpenAI's GPT-4. Includes automatic test generation with framework detection and inline documentation. Users provide their own API key stored locally in browser.

Installation

Backend

cd backend
python -m venv venv
source venv/bin/activate  # Windows: venv\Scripts\activate
pip install -r requirements.txt
uvicorn main:app --reload --port 8000

Frontend

cd frontend
npm install
npm run dev

Open http://localhost:3000

Usage

1. Add your OpenAI API key (stored locally in browser)
2. Enter what you want to build
3. Select programming language
4. Generate code, tests, and documentation
5. Copy or download results

Architecture

Frontend (Next.js + TypeScript)
    ↓ HTTP + Auth Header
Backend (FastAPI)
    ↓ User's API Key
OpenAI GPT-4

User's OpenAI API key stored in localStorage, sent in Authorization header. Backend creates separate LangChain instance per request with provided key.

API Endpoints

• POST /api/generate - Generate code (requires Authorization: Bearer <api_key>)
• POST /api/analyze - Analyse code quality
• GET /api/languages - Supported languages
• GET /api/health - Health check

Environment Variables

Backend (.env):

# Optional - users provide their own
OPENAI_API_KEY=""
API_HOST=0.0.0.0
API_PORT=8000
CORS_ORIGINS=["http://localhost:3000"]

Frontend (.env.local):

NEXT_PUBLIC_API_URL=http://localhost:8000/api

Tech Stack

Backend: FastAPI, LangChain, OpenAI API, tree-sitter, Pydantic Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS, Framer Motion

Key Features

• Multi-language support with framework-specific test generation
• Code quality metrics (complexity, readability, performance)
• Syntax validation using tree-sitter AST parsing
• Matrix-themed cyberpunk UI
• No API key storage on backend - users bring their own

Development

Tests: cd backend && pytest Linting: cd frontend && npm run lint

See CLAUDE.md for detailed development guide.

License

MIT