🚀 Backend Copilot AI

AI-powered backend analysis & generator tool - Not just another chatbot. A professional backend audit system with rule-based validation and AI-powered insights.

✨ Why This Exists

Traditional AI coding assistants generate code without understanding backend architecture. This tool analyzes first, suggests second - providing professional-grade insights that make tech leads raise their eyebrows (in a good way).

🎯 Core Principles

✅ Rule-based first, AI second - No hallucinations, just facts
✅ Structured output only - No free-form text, always JSON schemas
✅ Context-aware analysis - Understands your backend patterns
✅ Gradual enhancement - AI only when rules are insufficient

🚀 Features

✅ v1.0 - The Foundation (Current)

• OpenAPI Spec Generator - From code to professional API documentation
• Controller Analyzer - Complexity, duplication, and validation insights
• Auth/RBAC Flow Validator - Security gap detection
• Rule-based Pre-check - Syntax & schema validation before AI

🔄 v1.1 - Enhanced Analysis

• GitHub/GitLab integration
• Performance profiling suggestions
• Database query analysis
• Rate limiting recommendations

🎯 v2.0 - Advanced

• Multi-language support (Go, Python, Java)
• Auto-test generation
• Architecture pattern suggestions
• Compliance checks (GDPR, PCI-DSS, HIPAA)

🛠️ Tech Stack

• Runtime: Node.js 18+
• Framework: Fastify (Modern, fast, TypeScript-friendly)
• Validation: Zod (Schema-first validation)
• AI/LLM: OpenAI GPT-4 / Local LLM options
• Code Analysis: TypeScript AST Parser
• API Docs: Fastify Swagger + Swagger UI

📦 Installation

# Clone the repository
git clone https://github.com/yourusername/backend-copilot-ai.git
cd backend-copilot-ai

# Install dependencies
npm install

# Set up environment variables
cp .env.example .env
# Add your OpenAI API key to .env

# Start development server
npm run dev

⚡ Quick Start

1. Analyze Your Controller

curl -X POST http://localhost:3000/api/analyze/controller \
  -H "Content-Type: application/json" \
  -d '{
    "code": "app.post(\"/api/users\", async (req, res) => { const user = req.body; db.save(user); res.json(user); })"
  }'

2. Generate OpenAPI Spec

curl -X POST http://localhost:3000/api/generate/openapi \
  -H "Content-Type: application/json" \
  -d '{
    "code": "app.get(\"/api/users/:id\", authMiddleware, getUser)"
  }'

3. Check Health

curl http://localhost:3000/health

📊 Sample Output

{
  "complexity": {
    "score": 45,
    "level": "HIGH",
    "issues": ["nested_callbacks", "long_function", "missing_validation"]
  },
  "security_risk": "MEDIUM",
  "suggestions": [
    "Extract validation to middleware",
    "Add error handling for database calls",
    "Implement rate limiting"
  ]
}

🏗️ Project Structure

backend-copilot-ai/
├── src/
│   ├── analyzers/           # Code analysis modules
│   ├── generators/         # OpenAPI/documentation generators
│   ├── rules/             # Rule-based validators (FIRST!)
│   ├── ai/               # LLM integration with guardrails
│   ├── routes/           # API endpoints
│   └── utils/           # Shared utilities
├── schemas/             # Zod validation schemas
├── tests/              # Test suites
└── docs/               # Documentation

🔧 Development

# Development mode (hot reload)
npm run dev

# Build for production
npm run build

# Run tests
npm test

# Run tests with watch
npm run test:watch

# Lint code
npm run lint

# Format code
npm run format

🔐 Environment Variables

Create .env file:

NODE_ENV=development
PORT=3000
OPENAI_API_KEY=your_key_here  # Optional for v1

📈 Roadmap

Phase 1: Core Analysis (Current)

• Basic syntax checking

• OpenAPI generation

• Controller analysis

• Auth flow validation

• Rule engine completion

Phase 2: Enhanced Features

• GitHub integration

• Test generation

• Performance insights

• Database query analysis

Phase 3: Enterprise Ready

• Multi-language support

• Team collaboration features

• Compliance reporting

• Plugin system

🛡️ Security

• No code execution - only static analysis

• API keys stored locally

• All AI calls are opt-in

• Rule-based validation prevents harmful suggestions

📄 License

This project is licensed under the terms of the LICENSE.

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Made with ❤️ for backend developers who care about quality

This is not just another AI tool - it's your backend architect assistant.