Kaicode Software Design

Comprehensive Software Architecture & Component Design

System Architecture Overview

High-Level Architecture

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Frontend Architecture

Component Structure

Editor Components

  • • Monaco Editor Integration
  • • Y.js Provider for CRDT
  • • Multi-cursor Management
  • • Syntax Highlighting

Collaboration Layer

  • • Real-time Document Sync
  • • User Presence Indicators
  • • Cursor Position Sharing
  • • Conflict Resolution

AI Integration

  • • Ghost Text Completions
  • • Context-aware Suggestions
  • • DeepSeek API Integration
  • • Inline Code Generation

State Management

// Zustand Store Structure
interface EditorStore {
  // Document State
  document: Y.Doc
  provider: WebsocketProvider
  
  // User State
  currentUser: User
  connectedUsers: User[]
  
  // Editor State
  editorInstance: monaco.editor
  language: string
  theme: string
  
  // AI State
  completions: Completion[]
  isGenerating: boolean
  
  // Execution State
  output: string
  isRunning: boolean
  executionHistory: Execution[]
}

Backend Architecture

Service Architecture

Y.js WebSocket Server

  • • Document synchronization
  • • CRDT operations handling
  • • Real-time collaboration
  • • Connection management

Sync Server

  • • User authentication
  • • Session management
  • • Presence tracking
  • • Cursor synchronization

Judge Service

  • • Code execution orchestration
  • • Docker container management
  • • Security sandboxing
  • • Result processing

Orchestrator

  • • Job queue management
  • • Worker coordination
  • • Load balancing
  • • Failure handling

Code Execution Pipeline

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Data Models & Schemas

Database Schema

-- Users Table
CREATE TABLE users (
  id UUID PRIMARY KEY,
  email VARCHAR(255) UNIQUE,
  username VARCHAR(100),
  avatar_url TEXT,
  created_at TIMESTAMP,
  updated_at TIMESTAMP
);

-- Sessions Table
CREATE TABLE sessions (
  id UUID PRIMARY KEY,
  name VARCHAR(255),
  language VARCHAR(50),
  created_by UUID REFERENCES users(id),
  created_at TIMESTAMP,
  updated_at TIMESTAMP
);

-- Executions Table
CREATE TABLE executions (
  id UUID PRIMARY KEY,
  session_id UUID REFERENCES sessions(id),
  code TEXT,
  output TEXT,
  status VARCHAR(50),
  executed_at TIMESTAMP
);

API Models

// TypeScript Interfaces
interface User {
  id: string
  email: string
  username: string
  avatarUrl?: string
  isOnline: boolean
  cursor?: CursorPosition
}

interface Session {
  id: string
  name: string
  language: string
  createdBy: string
  participants: User[]
  document: Y.Doc
}

interface ExecutionJob {
  id: string
  sessionId: string
  code: string
  language: string
  status: 'pending' | 'running' | 'completed' | 'failed'
  output?: string
  error?: string
}

Security & Performance Considerations

Security Measures

  • Sandboxed Execution: All code runs in isolated Docker containers with resource limits
  • Authentication: JWT-based authentication with session management
  • Input Validation: Comprehensive validation of all user inputs and code
  • Rate Limiting: API rate limiting and execution time constraints

Performance Optimizations

  • CRDT Efficiency: Y.js provides efficient conflict-free replicated data types
  • Connection Pooling: WebSocket connection pooling and management
  • Caching Strategy: Redis caching for session data and user presence
  • Queue Management: AWS SQS for reliable job processing and scaling