Implement complete E2B coding agent with Next.js frontend and multi-LLM support

[Copilot]

This PR implements a comprehensive autonomous coding agent that runs 100% natively in E2B cloud sandboxes, transforming the minimal repository into a fully functional development assistant.

Features Implemented

🤖 Core Agent Capabilities

• AI-Powered Task Planning: Automatically breaks down complex development requests into actionable steps
• Secure Code Execution: All operations run in isolated E2B cloud sandboxes for maximum security
• Repository Management: Clone, analyze, and work with Git repositories
• File Operations: Create, read, and modify files safely within the sandbox environment
• Package Management: Install dependencies using npm, pip, and apt package managers
• Command Execution: Run shell commands with real-time output streaming

🧠 Multi-LLM Integration

• OpenAI Support: GPT-4 Turbo, GPT-4, and GPT-3.5 models with streaming responses
• Anthropic Support: Claude 3 Opus, Sonnet, and Haiku models
• Configurable Parameters: Temperature, max tokens, and model selection
• Streaming Responses: Real-time token streaming for immediate feedback

🌐 Modern Frontend

Built a complete Next.js application with:

• Real-time Dashboard: Live monitoring of agent activities and task execution
• Interactive Chat Interface: Natural language conversations with the coding agent
• Task Management: Visual creation, planning, and execution of development tasks
• Activity Logs: Color-coded, timestamped logs of all sandbox operations
• Configuration Panel: Easy setup for LLM providers and sandbox settings
• Responsive Design: Mobile-friendly interface built with Tailwind CSS

⚡ Real-time Communication

• WebSocket Integration: Bidirectional streaming using Socket.IO
• Live Updates: Instant feedback on command execution and file operations
• Progress Tracking: Real-time task and step status updates
• Error Handling: Graceful error recovery with detailed error messages

Technical Implementation

Backend Architecture

• TypeScript: Full type safety throughout the codebase
• Express Server: RESTful API with comprehensive endpoints
• E2B SDK: Latest integration for sandbox management
• Modular Design: Clean separation of concerns with agents, LLM providers, and sandbox managers

Frontend Architecture

• Next.js 14: Modern React framework with TypeScript
• Component-Based: Reusable LogViewer, TaskExecutor, and ChatInterface components
• State Management: Efficient React hooks for real-time updates
• API Client: Centralized HTTP and WebSocket communication

Key Components

• CodingAgent: Main orchestrator handling task planning and execution
• E2BSandboxManager: Complete sandbox lifecycle management with event emission
• LLM Providers: Abstracted interface supporting multiple AI providers
• Real-time Server: WebSocket server for streaming updates
• React Components: Professional UI components for all interactions

Usage Examples

The system can handle diverse development tasks:

// Example: Repository analysis
"Clone https://github.com/vercel/next.js and analyze its package.json structure"

// Example: Project setup  
"Create a Node.js Express API with health check endpoint and install dependencies"

// Example: Code quality analysis
"Run ESLint on a JavaScript project and generate a quality report"

Security & Reliability

• Isolated Execution: All code runs in secure E2B cloud sandboxes
• No Host Access: Complete isolation from the host system
• Error Handling: Comprehensive error recovery and user feedback
• Input Validation: Proper sanitization of all user inputs
• API Key Management: Secure environment variable handling

Documentation

Added comprehensive documentation including:

• Setup Guide: Step-by-step installation and configuration
• Usage Examples: Practical tasks from simple to complex
• API Reference: Complete endpoint and WebSocket event documentation
• Configuration Options: All available settings and their effects
• Troubleshooting: Common issues and solutions

The implementation successfully delivers on all requirements from the original issue, providing a production-ready coding agent that combines the power of AI with the security of cloud sandboxes and the convenience of a modern web interface.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.