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Agent skill

Arkenv

by yamcodes in yamcodes/arkenv

A skill your agent uses when setting up or changing environment variable validation with ArkEnv, or when application code reads process.env / import.meta.env.

MITAuto-check passedDevOps & Cloud

Install Arkenv

skills CLI
$ npx skills add yamcodes/arkenv --skill arkenv -a claude-code

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

GitHub CLI
$ gh skill install yamcodes/arkenv arkenv --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/yamcodes/arkenv.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/agent-plugin/skills/arkenv .claude/skills/arkenv && 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
arkenv
GitHub stars
145
Token cost
~224 tokens
SKILL.md length
81 words
Files
1
Skills in repo
20
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when setting up or changing environment variable validation with ArkEnv, or when application code reads process.env / import.meta.env.

  • Changing environment variable validation with ArkEnv
  • Calls npx
  • Application code reads process.env / import.meta.env

What it does

Arkenv is an agent skill from yamcodes/arkenv. Use when setting up or changing environment variable validation with ArkEnv, or when application code reads process.env / import.meta.env. Enforce import { env } from "./env".

Its SKILL.md is about 220 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in DevOps & Cloud, covering Secrets management. The repository describes itself as: ⛯ Typesafe environment variables with ArkType, Zod, or Valibot. The licence is MIT.

When your agent uses it

  • Changing environment variable validation with ArkEnv
  • Application code reads process.env / import.meta.env

Example prompts

  • “/arkenv”

Requirements

  • Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit 7340aa2. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx

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

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    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

Arkenv loads about 224 tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 81 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~46
When it runs · the whole SKILL.md, loaded when a task matches
~224

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

The full file from yamcodes/arkenv at commit 7340aa2, republished under its MIT licence (© yamcodes). 81 words, ~224 tokens.

Download SKILL.mdSave it as .claude/skills/arkenv/SKILL.md (or your agent's skills folder).
name
arkenv
description
Use when setting up or changing environment variable validation with ArkEnv, or when application code reads process.env / import.meta.env. Enforce import { env } from "./env".

ArkEnv

ArkEnv v1's only application surface is import { env } from "./env".

  • Runtime: @arkenv/core (ArkType) or @arkenv/standard (Zod, Valibot, Standard Schema).
  • CLI: npx arkenv init --agent. Parse JSON on stdout. Never pass --force unless a refusal's nextActions include a run-command with --force.
  • Do not read process.env or import.meta.env in application components.
  • Do not add ambient .d.ts ProcessEnv / ImportMetaEnv augmentations.
  • Public prefixes: NEXT_PUBLIC_, NUXT_PUBLIC_, VITE_, BUN_PUBLIC_. Never put secrets behind those prefixes.
  • Prefer MCP tools init and audit from this plugin (/arkenv:init, /arkenv:audit).

© yamcodes, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in packages/agent-plugin/skills/arkenv of yamcodes/arkenv.

Open the folder on GitHubat commit 7340aa2

Compare with similar skills

Arkenv 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.

Arkenv compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Arkenv this skillyamcodes/arkenv145—~224Automated safety check: PassMIT
Iron Proxy Gateway for NanoClawnanocoai/nanoclaw31k—~4.6kAutomated safety check: NotesMIT
LangBot Deployment Guidelangbot-app/LangBot18k—~1.2kAutomated safety check: NotesApache-2.0
Env Var Conventionssgl-project/sglang37k2 repos~2.9kAutomated safety check: PassApache-2.0
Mac Fleet Maintenancesteipete/agent-scripts7.3k—~4.8kAutomated safety check: PassMIT
Add Config Env Varbaserow/baserow6.1k—~1.1kAutomated safety check: PassCustom licence

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  • Code Review

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  • Forward Port

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    Manually forward-ports merged dev (v0) changes to the v1 branch, adapting code to v1's package layout and changeset names.

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Categories

Questions about Arkenv

What does Arkenv do?

A skill your agent uses when setting up or changing environment variable validation with ArkEnv, or when application code reads process.env / import.meta.env. Arkenv is an agent skill from yamcodes/arkenv.env.

When should I use Arkenv?

Arkenv fits situations like: changing environment variable validation with ArkEnv; application code reads process.env / import.meta.env.

How do I install Arkenv in Claude Code?

Run `npx skills add yamcodes/arkenv --skill arkenv -a claude-code`. Or copy the skill folder (packages/agent-plugin/skills/arkenv in yamcodes/arkenv) into .claude/skills/arkenv in your project. Claude Code loads it when a task matches its description.

How do I install Arkenv in Codex?

Run `npx skills add yamcodes/arkenv --skill arkenv -a codex`. Or copy the skill folder (packages/agent-plugin/skills/arkenv in yamcodes/arkenv) into .agents/skills/arkenv in your project. Codex loads it when a task matches its description.

Can I use Arkenv 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 yamcodes/arkenv --skill arkenv -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/arkenv, .gemini/skills/arkenv, .github/skills/arkenv and .opencode/skills/arkenv in your project.

What does Arkenv need to run?

Going by SKILL.md and its folder, Arkenv needs the command-line tools its instructions call (npx). Our summary lists: Node.js.

Does Arkenv access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Arkenv 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 Arkenv use?

Arkenv is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Arkenv use?

About 224 tokens (SKILL.md is roughly 896 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Arkenv?

Skills that share tags, products or a category with Arkenv: Iron Proxy Gateway for NanoClaw (nanocoai/nanoclaw, 31k stars), LangBot Deployment Guide (langbot-app/LangBot, 18k stars), Env Var Conventions (sgl-project/sglang, 37k stars) and Mac Fleet Maintenance (steipete/agent-scripts, 7.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Arkenv?

yamcodes (a GitHub user) maintains it in yamcodes/arkenv, which has 145 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on October 5, 2026.

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