Extension Host (src/extension.ts)
├── Activates when VS Code starts
├── Creates MCP Server
│   └── Express + SSE Server (54321-54421 port range)
└── Creates WebView Panel

MCP Server (src/server/*)
├── SSE Event Stream
│   ├── Real-time tool discovery updates
│   ├── Documentation streaming
│   └── Connection state management
│
└── Tool Discovery System
    ├── path-scanner.ts
    │   └── Finds tools in workspace (bin/, node_modules/.bin)
    └── package-scanner.ts
        └── Scans package.json for available tools

React WebView (src/panel/*)
├── UI Components
│   └── Shows available tools and their docs
│
└── SSE Client
    ├── Requests available tools
    └── Streams tool documentation

my-tools-mcp/
├── src/                      # Source code
│   ├── extension.ts          # Extension entry point
│   ├── env.ts               # Environment configuration
│   ├── server/              # Built-in MCP server
│   │   ├── index.ts         # Server setup and SSE handling
│   │   └── controllers/     # Tool discovery and execution
│   │       ├── docs/        # Documentation controllers
│   │       ├── path-scanner.ts    # Tool discovery
│   │       └── package-scanner.ts # Package.json scanning
│   ├── panel/              # WebView UI (React)
│   │   ├── index.tsx      # WebView entry point
│   │   ├── App.tsx        # Main React component
│   │   └── components/    # UI components
│   ├── types/             # Shared TypeScript types
│   └── lib/               # Shared utilities
├── dist/                  # Compiled output
└── src/__tests__/        # Test files

pnpm install

# Start webpack in watch mode
pnpm run dev

# Or build for production
pnpm run build