[Phase 1.3] MCP Server Basic Implementation (Days 6-9)

[mfittko]

🔌 MCP Server Basic Implementation (Days 6-9)

Component: IDE Integration | Critical Path: Essential for IDE integration
Parent Issue: #2 | Timeline: Days 6-9 of Phase 1

🎯 Objective

Implement basic Model Context Protocol server that IDEs can connect to for tool execution and agent workflow integration.

📋 Tasks

3.1 MCP Protocol Foundation

• 3.1.1 Install and study MCP TypeScript dependencies

  • Research official MCP TypeScript packages
  • Study MCP protocol specification and message formats
  • Set up proper TypeScript types for MCP messages
  • Configure development environment for MCP testing

• 3.1.2 Create AgentsMCPServer base class with proper initialization

  • Implement MCP server lifecycle (start/stop)
  • Handle client connections and disconnections
  • Set up proper error handling and logging
  • Configure server settings and capabilities

• 3.1.3 Implement core MCP protocol message handling

  • Handle MCP handshake and capability negotiation
  • Implement tool discovery and registration
  • Process tool execution requests
  • Return properly formatted MCP responses

3.2 Tool Registration System

• 3.2.1 Create MCPTool interface with comprehensive type safety

  • Define tool metadata (name, description, parameters)
  • Type-safe parameter validation
  • Tool execution signature with async support
  • Error handling and result formatting

• 3.2.2 Implement tool registry with validation and discovery

  • Dynamic tool registration and deregistration
  • Tool capability querying and validation
  • Access control integration for tool permissions
  • Tool versioning and compatibility checking

• 3.2.3 Create tool result formatting for MCP responses

  • Structured result objects with metadata
  • Error handling with proper MCP error codes
  • Streaming result support for long-running tools
  • Binary data handling for files and images

• 3.2.4 Add comprehensive error handling and logging

  • Detailed error logging with context
  • Client error reporting with user-friendly messages
  • Performance monitoring and metrics
  • Debug mode for development troubleshooting

3.3 Basic Built-in Tools

• 3.3.1 Implement echo_tool for testing MCP connections

  • Simple echo functionality for testing
  • Parameter validation demonstration
  • Basic success/error response patterns
  • Connection and protocol validation

• 3.3.2 Implement file_read_tool with security restrictions

  • Secure file reading with path validation
  • Directory traversal prevention
  • File size limits and timeout handling
  • Proper encoding and binary file support

• 3.3.3 Create additional utility tools for basic operations

  • list_files_tool with filtering and pagination
  • write_file_tool with security validation
  • execute_command_tool with sandboxing (if safe)
  • Basic text processing tools

3.4 MCP Server Testing

• 3.4.1 Create comprehensive MCP server integration tests

  • Test MCP protocol compliance
  • Tool registration and execution tests
  • Error handling and edge case scenarios
  • Performance and timeout testing

• 3.4.2 Build manual testing scripts for development

  • MCP client simulator for testing
  • Tool execution test scripts
  • Connection and disconnection scenarios
  • Load testing for concurrent connections

• 3.4.3 Test actual IDE integration (Cursor/VS Code)

  • Set up test environment with real IDE
  • Verify MCP connection and tool discovery
  • Test tool execution from IDE interface
  • Document IDE-specific integration steps

• 3.4.4 Validate MCP protocol compliance

  • Protocol message format validation
  • Specification compliance testing
  • Interoperability with other MCP clients
  • Version compatibility testing

✅ Definition of Done

• MCP server starts and accepts connections
• IDEs can connect and discover tools
• Basic tools (echo, file_read) work correctly
• Tool execution returns proper MCP responses
• Error handling provides clear feedback
• Integration tests pass with real MCP clients
• Performance meets requirements (quick tool execution)
• Security restrictions prevent unauthorized operations

🔗 Dependencies

• Requires: Schema Design ([Phase 1.2] Schema Design & Validation (Days 3-5) #4) for tool configurations
• Enables: CLI integration and IDE workflows

📚 References

• MCP Protocol Specification
• MCP TypeScript SDK
• IDE Integration Examples

Note: This MCP server is the primary interface for IDE integration and tool execution.