# ClickUp MCP Server Technical Context

## Technology Stack

### Core Technologies
1. TypeScript
   - Version: 5.x
   - Strong typing
   - Modern ECMAScript features
   - Type-safe development

2. MCP SDK
   - Version: @modelcontextprotocol/sdk v1.6.1
   - Core MCP functionality
   - Transport handling
   - Protocol compliance

3. Node.js
   - Runtime environment
   - Async/await support
   - Package management
   - Development tools

### Key Dependencies
1. Zod
   - Schema validation
   - Runtime type checking
   - Parameter validation
   - Error messages

2. Axios
   - HTTP client
   - API requests
   - Response handling
   - Error management

3. Express
   - HTTP server
   - SSE support
   - Route handling
   - Middleware support

4. dotenv
   - Environment variables
   - Configuration management
   - Secret handling

## Development Setup

### Environment Requirements
1. Node.js
   - Version: 18.x or higher
   - npm or yarn package manager
   - Global dependencies:
     * TypeScript
     * ts-node (development)

2. IDE/Editor
   - VSCode recommended
   - TypeScript support
   - ESLint integration
   - Prettier formatting

3. Testing Tools
   - MCP Test Client
   - Jest for unit tests
   - Postman/Insomnia for API testing

### Configuration
1. Environment Variables
```env
CLICKUP_API_TOKEN=your_token_here
NODE_ENV=development
PORT=3000
```

2. TypeScript Configuration
```json
{
  "compilerOptions": {
    "target": "ES2020",
    "module": "ESNext",
    "moduleResolution": "node",
    "esModuleInterop": true,
    "strict": true
  }
}
```

3. ESLint Configuration
```json
{
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ]
}
```

## Technical Constraints

### API Limitations
1. Rate Limiting
   - ClickUp API limits
   - Retry mechanisms
   - Queue management

2. Authentication
   - API token requirements
   - OAuth flow (optional)
   - Token security

3. Response Handling
   - Error management
   - Data validation
   - Type conversion

### Performance Considerations
1. Response Time
   - API call optimization
   - Caching strategies
   - Connection pooling

2. Memory Usage
   - Resource cleanup
   - Memory management
   - Garbage collection

3. Concurrency
   - Request handling
   - Connection limits
   - Thread management

## Dependencies

### Production Dependencies
```json
{
  "dependencies": {
    "@modelcontextprotocol/sdk": "^1.6.1",
    "axios": "^1.x",
    "dotenv": "^16.x",
    "express": "^4.x",
    "zod": "^3.x"
  }
}
```

### Development Dependencies
```json
{
  "devDependencies": {
    "@types/node": "^18.x",
    "@typescript-eslint/eslint-plugin": "^5.x",
    "@typescript-eslint/parser": "^5.x",
    "eslint": "^8.x",
    "prettier": "^2.x",
    "typescript": "^5.x"
  }
}
```

## Build Process

### Development
1. Local Setup
```bash
npm install
npm run dev
```

2. Watch Mode
```bash
npm run watch
```

3. Type Checking
```bash
npm run type-check
```

### Production
1. Build
```bash
npm run build
```

2. Start
```bash
npm start
```

## Testing

### Unit Tests
1. Framework: Jest
2. Coverage requirements
3. Test patterns

### Integration Tests
1. MCP Test Client
2. API testing
3. End-to-end flows

### Performance Testing
1. Load testing
2. Stress testing
3. Memory profiling

## Deployment

### Requirements
1. Node.js environment
2. Environment variables
3. Network access

### Process
1. Build TypeScript
2. Copy assets
3. Set environment
4. Start server

### Monitoring
1. Error logging
2. Performance metrics
3. Health checks

## Security

### API Token
1. Storage
   - Environment variables
   - Secure configuration
   - Access control

2. Usage
   - Request headers
   - Token validation
   - Error handling

### Data Protection
1. Input validation
2. Output sanitization
3. Error message safety

## Maintenance

### Updates
1. Dependency updates
2. Security patches
3. API compatibility

### Monitoring
1. Error tracking
2. Performance metrics
3. Usage statistics

### Documentation
1. API documentation
2. Code comments
3. Change logs