A querystring parser that supports nesting and arrays, with a depth limit

Helper package to shim a method into `Array.prototype[Symbol.unscopables]`

resolve like require.resolve() on behalf of files asynchronously and synchronously

Is this specifier a node.js core module?

Is this value a JS Boolean? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Determine if the JS environment has BigInt support.

ES spec-like internal slots

`Iterator.prototype`, or a shared object to use.

Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

`Object.defineProperty`, but not IE 8's broken one.

`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.

A directed and undirected multi-graph library

AI coding assistant skill (Claude Code, Codex, Gemini CLI, Kimi Code, GitHub Copilot CLI, Aider, OpenCode, OpenClaw) - turn any folder of code, docs, papers, images, or audio/video transcripts into a queryable knowledge graph

An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.

parse argument options

Store information about any JS value in a side channel, using a linked list

ECMAScript spec-compliant polyfill/shim for `globalThis`

Unbox a boxed JS primitive value.

ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

A helper to optimistically set Symbol.toStringTag, when possible.