Does it support modern linting tools?

Yes, it includes full support for ESLint 9's new flat configuration system and the Biome all-in-one toolchain.

Does this skill support the latest JavaScript features?

Yes, it is specifically designed for ES2024+ and emerging ES2025 standards, including Set methods, immutable array methods, and import attributes.

Can it help me run TypeScript in Node.js without a build step?

Absolutely. It provides patterns for using Node.js 22's native experimental-strip-types flag to run TypeScript files directly.

Which backend frameworks does it specialize in?

It provides deep expertise for Fastify (performance), Hono (edge-first), and Express (standard), along with modern middleware patterns.

Modern JavaScript & Node.js 22 Development

Name: Modern JavaScript & Node.js 22 Development
Author: modu-ai

bymodu-ai

•

API Development

Specializes in modern JavaScript development using ES2024+ features across Node.js, Bun, and Deno runtimes with high-performance frameworks and testing tools.

About

This skill transforms Claude into a senior JavaScript engineer expert in the latest ECMAScript standards and modern backend ecosystems. It provides specialized guidance for implementing ES2024/2025 features like Set operations and immutable arrays, optimizing Node.js 22 LTS applications with native TypeScript support, and architecting APIs using Fastify, Hono, or Express. Whether you are configuring ESLint 9 flat configs, setting up Vitest for testing, or leveraging Bun's high-performance toolkit, this skill ensures your code follows contemporary best practices for security, performance, and maintainability.

Key Features

Modern linting and formatting with ESLint 9 flat configs and Biome
Optimized configurations for Node.js 22 LTS, Bun 1.x, and Deno 2.x runtimes
Expert implementation of ES2024+ features like Promise.withResolvers and Set methods
16 GitHub stars
Comprehensive testing setups with Vitest, Jest, and native Node.js test runners
Production-ready patterns for Fastify, Hono, and Express frameworks

Use Cases

Refactoring legacy projects to modern ESM standards and Node.js 22 LTS
Architecting high-performance, edge-ready APIs using Hono or Fastify
Implementing robust unit and integration testing suites with Vitest and V8 coverage

About

Key Features

Modern linting and formatting with ESLint 9 flat configs and Biome
Optimized configurations for Node.js 22 LTS, Bun 1.x, and Deno 2.x runtimes
Expert implementation of ES2024+ features like Promise.withResolvers and Set methods
16 GitHub stars
Comprehensive testing setups with Vitest, Jest, and native Node.js test runners
Production-ready patterns for Fastify, Hono, and Express frameworks

Use Cases

Refactoring legacy projects to modern ESM standards and Node.js 22 LTS
Architecting high-performance, edge-ready APIs using Hono or Fastify
Implementing robust unit and integration testing suites with Vitest and V8 coverage