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unjs

Comprehensive ecosystem of single-purpose JavaScript libraries for universal, runtime-agnostic development. Covers 50+ packages across HTTP frameworks (H3, Nitro), utilities (path, URL, hashing), storage, CLI tools, and build systems Supports multiple runtimes: Node.js, browsers, edge environments, Deno, Bun, and Cloudflare Workers Includes specialized tools for image processing, WebAssembly, PDF handling, QR codes, crypto, and database connectivity Designed for composability: libraries work independently or together to build universal JavaScript applications

INSTALLATION
npx skills add https://github.com/hairyf/skills --skill unjs
Run in your project or agent environment. Adjust flags if your CLI version differs.

SKILL.md

$2a

Topic

Description

Reference

Defu

Recursive default property assignment

core-defu

Destr

Fast and secure JSON.parse alternative

core-destr

Ohash

Fast hashing library based on murmurhash3

core-ohash

Pathe

Cross-platform path utilities (Node.js path replacement)

core-pathe

UFO

URL utilities for parsing, formatting, and manipulation

core-ufo

Scule

String case conversion utilities (camelCase, kebab-case, etc.)

core-scule

Build Tools

Topic

Description

Reference

Unbuild

Unified JavaScript build system

core-unbuild

Mkdist

Generate distribution files from source

core-mkdist

Unplugin

Unified plugin system for Vite, Rollup, webpack, esbuild, and more

core-unplugin

Features

Storage & Data

Topic

Description

Reference

Unstorage

Async key-value storage API with multiple drivers

features-unstorage

Environment & Runtime

Topic

Description

Reference

Unenv

Convert JavaScript code to be runtime agnostic

features-unenv

Std-env

Standard environment variables utilities

features-std-env

HTTP Client

Topic

Description

Reference

Ofetch

Better fetch API for Node.js, browser, and workers

features-ofetch

Routing

Topic

Description

Reference

Radix3

Lightweight and fast router based on Radix Tree

features-radix3

CLI & Tools

Topic

Description

Reference

Citty

Elegant CLI builder with type-safe commands

features-citty

Giget

Download templates and git repositories

features-giget

Hooks & Context

Topic

Description

Reference

Hookable

Awaitable hooks system for plugins and extensions

features-hookable

Unctx

Composables pattern in vanilla JavaScript

features-unctx

Crypto & Security

Topic

Description

Reference

Uncrypto

Universal crypto API for Node.js, browser, and edge

features-uncrypto

Module System

Topic

Description

Reference

Mlly

ECMAScript module utilities for Node.js

features-mlly

Unimport

Auto-import APIs in modules

features-unimport

Type System

Topic

Description

Reference

Untyped

Generate types and markdown from config objects

features-untyped

Logging & Console

Topic

Description

Reference

Consola

Elegant console wrapper with multiple reporters

features-consola

Documentation & Markdown

Topic

Description

Reference

Automd

Automated markdown maintainer

features-automd

Changelogen

Generate beautiful changelogs using conventional commits

features-changelogen

Mdbox

Simple markdown utilities

features-mdbox

Undocs

Minimal documentation theme and CLI for UnJS projects

features-undocs

Configuration

Topic

Description

Reference

C12

Smart configuration loader

features-c12

Confbox

Compact and high quality YAML, TOML, JSONC and JSON5 parsers

features-confbox

Rc9

Read/write config couldn't be easier

features-rc9

HTTP & WebSocket

Topic

Description

Reference

Httpxy

Full-featured HTTP and WebSocket proxy for Node.js

features-httpxy

Crossws

Cross-platform WebSocket servers for Node.js, Deno, Bun and Cloudflare Workers

features-crossws

Cookie-es

ESM cookie serializer and deserializer

features-cookie-es

Image Processing

Topic

Description

Reference

IPX

High performance, secure and easy to use image proxy based on Sharp and libvips

features-ipx

Image-meta

Detect image type and size using pure JavaScript

features-image-meta

Jimp-compact

Lightweight version of Jimp - image processing library

features-jimp-compact

Fontaine

Automatic font fallback based on font metrics

features-fontaine

Code Generation & AST

Topic

Description

Reference

Magicast

Programmatically modify JavaScript and TypeScript source codes

features-magicast

Magic-regexp

A compiled-away, type-safe, readable RegExp alternative

features-magic-regexp

Knitwork-X

Utilities to generate safe JavaScript code (actively maintained fork)

features-knitwork

Jiti

Runtime TypeScript and ESM support for Node.js

features-jiti

Database & Storage

Topic

Description

Reference

Db0

Lightweight SQL connector

features-db0

Mongoz

Zero config MongoDB server

features-mongoz

Utilities

Topic

Description

Reference

Fs-memo

Easy persisted memo object for Node.js

features-fs-memo

Get-port-please

Get an available open port

features-get-port-please

Perfect-debounce

Debounce promise-returning and async functions

features-perfect-debounce

Serve-placeholder

Smart placeholder for missing assets

features-serve-placeholder

Theme-colors

Easily generate color shades for themes

features-theme-colors

Package Management

Topic

Description

Reference

Nypm

Unified package manager for Node.js

features-nypm

Pkg-types

Node.js utilities and TypeScript definitions for package.json and tsconfig.json

features-pkg-types

Bundle-runner

Run webpack bundles in Node.js with optional VM sandboxing

features-bundle-runner

Web APIs

Topic

Description

Reference

Unhead

Universal document head tag manager

features-unhead

Ungh

Unlimited access to GitHub API

features-ungh

Unpdf

Utilities to work with PDFs in Node.js, browser and workers

features-unpdf

Unwasm

WebAssembly tools for JavaScript

features-unwasm

Uqr

Generate QR Code universally, in any runtime, to ANSI, Unicode or SVG

features-uqr

Untun

Tunnel your local HTTP(s) server to the world powered by Cloudflare Quick Tunnels

features-untun

Node-fetch-native

A better redistribution of node-fetch

features-node-fetch-native

Build Tools (Additional)

Topic

Description

Reference

Webpackbar

Elegant progress bar and profiler for webpack 3, 4 and 5

features-webpackbar

Nanotar

Tiny and fast Tar utils for any JavaScript runtime

features-nanotar

BrowserAct

Let your agent run on any real-world website

Bypass CAPTCHA & anti-bot for free. Start local, scale to cloud.

Explore BrowserAct Skills →

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