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Agent skill

Es Toolkit

by pedronauck in pedronauck/skills

A skill your agent uses when implementing utility functions, array operations, object manipulation, or string operations.

No licenceAuto-check passed

Install Es Toolkit

skills CLI
$ npx skills add pedronauck/skills --skill es-toolkit -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install pedronauck/skills es-toolkit --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/pedronauck/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/curated/es-toolkit .claude/skills/es-toolkit && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
es-toolkit
GitHub stars
634
Token cost
~399 tokens
SKILL.md length
103 words
Files
2 (incl. references)
Skills in repo
65
Repo updated
First seen
Licence
None found

At a glance

A skill your agent uses when implementing utility functions, array operations, object manipulation, or string operations.

  • Implementing utility functions
  • SKILL.md covers Quick Reference, Key Categories, Import Pattern and Documentation
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Array operations

What it does

Es Toolkit is an agent skill from pedronauck/skills. Use when implementing utility functions, array operations, object manipulation, or string operations. ALWAYS use es-toolkit instead of custom implementations or native methods.

Its SKILL.md is about 400 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/patterns.md`).

The repository describes itself as: My personal favorite skills.

When your agent uses it

  • Implementing utility functions
  • Array operations
  • Object manipulation
  • String operations

Example prompts

  • “/es-toolkit”

Requirements

  • Pre-approved tools (allowed-tools): Read, Grep, Glob

What it can do on your machine

Read from SKILL.md and the folder at commit 0422940. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Grep
    • Glob

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • es-toolkit.dev
    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Es Toolkit loads about 399 tokens when it runs, and up to ~1.5k if it reads all its reference files. Until then it costs about 47 tokens; SKILL.md has 103 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~47
When it runs · the whole SKILL.md, loaded when a task matches
~399
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 103 words (~399 tokens).

“This skill provides guidelines and best practices for using the es-toolkit utility library in this project.”

— opening of SKILL.md by pedronauck
name
es-toolkit
allowed-tools
Read, Grep, Glob

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file (references) in skills/curated/es-toolkit of pedronauck/skills.

  • SKILL.md
  • references/patterns.md

Open the folder on GitHubat commit 0422940

Compare with similar skills

Es Toolkit next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Es Toolkit compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Es Toolkit this skillpedronauck/skills634—~399Automated safety check: PassNone
Modern Array Methodsthedaviddias/Front-End-Checklist74k—~494Automated safety check: PassMIT
Object Altthedaviddias/Front-End-Checklist74k—~429Automated safety check: PassMIT
Azure Functionsdavila7/claude-code-templates32k2 repos~344Automated safety check: PassMIT
Object Storagesickn33/agentic-awesome-skills47k2 repos~2.6kAutomated safety check: PassMIT
Neon Functionssickn33/agentic-awesome-skills47k1 repos~8.6kAutomated safety check: NotesApache-2.0

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Questions about Es Toolkit

What does Es Toolkit do?

A skill your agent uses when implementing utility functions, array operations, object manipulation, or string operations. Es Toolkit is an agent skill from pedronauck/skills. Use when implementing utility functions, array operations, object manipulation, or string operations.

When should I use Es Toolkit?

Es Toolkit fits situations like: implementing utility functions; array operations; object manipulation; string operations.

How do I install Es Toolkit in Claude Code?

Run `npx skills add pedronauck/skills --skill es-toolkit -a claude-code`. Or copy the skill folder (skills/curated/es-toolkit in pedronauck/skills) into .claude/skills/es-toolkit in your project. Claude Code loads it when a task matches its description.

How do I install Es Toolkit in Codex?

Run `npx skills add pedronauck/skills --skill es-toolkit -a codex`. Or copy the skill folder (skills/curated/es-toolkit in pedronauck/skills) into .agents/skills/es-toolkit in your project. Codex loads it when a task matches its description.

Can I use Es Toolkit in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add pedronauck/skills --skill es-toolkit -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/es-toolkit, .gemini/skills/es-toolkit, .github/skills/es-toolkit and .opencode/skills/es-toolkit in your project.

What does Es Toolkit need to run?

SKILL.md names no scripts, command-line tools or credentials: Es Toolkit is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Grep, Glob.

Does Es Toolkit access the network?

SKILL.md names 2 domains. As links in the text: es-toolkit.dev and github.com. This is read from the text; nothing was executed.

Is Es Toolkit safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Es Toolkit use?

No licence was found for Es Toolkit or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Es Toolkit use?

About 399 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.

What are the alternatives to Es Toolkit?

Skills that share tags, products or a category with Es Toolkit: Modern Array Methods (thedaviddias/Front-End-Checklist, 74k stars), Object Alt (thedaviddias/Front-End-Checklist, 74k stars), Azure Functions (davila7/claude-code-templates, 32k stars) and Object Storage (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Es Toolkit?

pedronauck (a GitHub user) maintains it in pedronauck/skills, which has 634 GitHub stars. The repository holds 65 skills in this directory. The repository was last updated on September 14, 2026.

Source: pedronauck/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.