MCP TypeScript SDK Guide

Build & Test Commands

npm run build        # Build ESM and CJS versions
npm run lint         # Run ESLint
npm test             # Run all tests
npx jest path/to/file.test.ts  # Run specific test file
npx jest -t "test name"        # Run tests matching pattern

Code Style Guidelines

TypeScript: Strict type checking, ES modules, explicit return types
Naming: PascalCase for classes/types, camelCase for functions/variables
Files: Lowercase with hyphens, test files with .test.ts suffix
Imports: ES module style, include .js extension, group imports logically
Error Handling: Use TypeScript's strict mode, explicit error checking in tests
Formatting: 2-space indentation, semicolons required, single quotes preferred
Testing: Co-locate tests with source files, use descriptive test names
Comments: JSDoc for public APIs, inline comments for complex logic

Project Structure

/src: Source code with client, server, and shared modules
Tests alongside source files with .test.ts suffix
Node.js >= 18 required

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