Guide

This is a reference companion for es-toolkit, the modern utility library that's gunning for lodash's throne. It pulls install commands, import patterns, and setup instructions straight from the local docs rather than Claude's training data, which matters because package managers and import paths drift between versions. You get runtime-specific guidance for Node, Bun, Deno, and browsers, plus it'll warn you off namespace imports that kill tree-shaking. The skill reads package.json to detect your actual package manager and shows you every available subpath import. Honest take: it's narrow in scope but solves the real problem of getting correct, current setup info instead of outdated Stack Overflow answers.

skills.sh installs: 538
GitHub stars: 11.4K
last updated: Aug 21, 2026

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Install

$ npx -y skills add toss/es-toolkit --skill guide --agent claude-code

Installs into .claude/skills of the current project.

Files

es-toolkit Usage Guide

Provide guidance on installing, importing, and using es-toolkit across different runtimes.

Input

$ARGUMENTS — A topic or question about es-toolkit usage.

Why source-of-truth matters

Installation commands and import paths change across versions. When es-toolkit is already installed, verify its version and exports from the installed package. The skill may be installed as a standalone directory, so never assume the es-toolkit repository or a sibling docs directory is available.

Workflow

1. Inspect the user's project

Detect the package manager from its lockfile:

package-lock.json → npm
yarn.lock → Yarn
pnpm-lock.yaml → pnpm
bun.lock or bun.lockb → Bun

If es-toolkit is installed, resolve its package metadata from the package that depends on it:

node -e "console.log(require.resolve('es-toolkit/package.json'))"

Run the command from the relevant workspace package, not automatically from a monorepo root. If the project uses Yarn Plug'n'Play, use yarn node instead of node. Read the resolved package.json to verify the installed version and its exports.

SKILL.md on GitHub