learn-docker-and-k8s: Skill for Claude Code

.claude/skills/env-check/SKILL.md

env-check is a skill for Claude Code from ericboy0224/learn-docker-and-k8s. It costs 52 tokens per session (320 once invoked), scanned B, original, no licence file.

A readiness check for the Learn Docker & K8s game. It verifies that the required container and Kubernetes tools are installed and that the computer has enough disk space and available network ports.

In plain words
What is it for?
Use it to check requirements, prepare a new environment, or investigate problems starting the game.
Why use it?
It finds setup problems before they prevent the lessons or challenges from running.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

This is ericboy0224/learn-docker-and-k8s's own configuration. It tells Claude Code how to work on learn-docker-and-k8s itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything learn-docker-and-k8s configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ericboy0224/learn-docker-and-k8s. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ericboy0224/learn-docker-and-k8s/main/.claude/skills/env-check/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ericboy0224/learn-docker-and-k8s

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for env-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/ericboy0224/learn-docker-and-k8s/env-check/github.svg)](https://agentmods.dev/skills/ericboy0224/learn-docker-and-k8s/env-check)
Your own site
<a href="https://agentmods.dev/skills/ericboy0224/learn-docker-and-k8s/env-check"><img src="https://agentmods.dev/badge/skills/ericboy0224/learn-docker-and-k8s/env-check/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for env-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/ericboy0224/learn-docker-and-k8s/env-check"><img src="https://agentmods.dev/badge/skills/ericboy0224/learn-docker-and-k8s/env-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 320 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.00320
Opus 5 $0.00026 $0.00160
Sonnet 5 $0.00010 $0.00064
Haiku 4.5 $0.00005 $0.00032

Measured 9d ago against content hash ddf3289883f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade B, and why

env-check scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Docker not running → "Start Docker Desktop" or `sudo systemctl start docker`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- curl: "Some challenge verifications use curl. Most things still work without it."
.claude/skills/env-check/SKILL.md · 37 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 37 lines · 52 tokens per session scan B ddf3289883f8

Subscribe to this mod's changes

env-check is a skill published in the GitHub repository ericboy0224/learn-docker-and-k8s (474 stars, last pushed 5mo ago), with no licence file. It adds 52 tokens to every session and 320 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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