The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

The library for web and native user interfaces.

JavaScript Style Guide

The React Framework

Coding articles to level up your development skills

Promise based HTTP client for the browser and node.js

Set up a modern web app by running one command.

The iconic SVG, font, and CSS toolkit

Get a full fake REST API with zero coding in less than 30 seconds (seriously)

A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs,…

Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render it before sending.

Prettier is an opinionated code formatter.

Semantic is a UI component framework based around useful principles from natural language.

Parse, validate, manipulate, and display dates in javascript.

A browser based code editor

A tool for writing better scripts

Meteor, the JavaScript App Platform

The zero configuration build tool for the web. 📦🚀

The 1.x line is frozen - features and bugfixes now happen on https://github.com/yarnpkg/berry

⚛️ Fast 3kB React alternative with the same modern API. Components & Virtual DOM.

Git hooks made easy 🐶 woof!

A toolkit to automate & enhance your workflow

🎨 A curated list of delightful VS Code packages and resources.

Create the next immutable state by mutating the current one

Find and fix problems in your JavaScript code.

JavaScript's utility _ belt

React components for efficiently rendering large lists and tabular data

Next-generation ES module bundler

A window.fetch JavaScript polyfill.

Simple, unobtrusive authentication for Node.js.