docker-expert

docker-expert is a skill for Claude Code, Codex from duck4nh/antigravity-kit. It costs 60 tokens per session (3,243 once invoked), scanned A, original, from a forked repository, no licence file.

A skill for working with Docker, a tool that packages applications and their dependencies into containers. It covers Dockerfiles, multi-stage builds, image size, security, Docker Compose, networking, and production deployment.

In plain words
What is it for?
Optimising Dockerfiles and images, fixing container issues, hardening security, configuring Compose and networking, and preparing deployments.
Why use it?
It helps diagnose container problems and improve how applications are built, secured, connected, and deployed.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/duck4nh/antigravity-kit/docker-expert
Any agent
npx skills add duck4nh/antigravity-kit --skill docker-expert
Clone the repo
git clone --depth 1 https://github.com/duck4nh/antigravity-kit

Made for: Claude Code, Codex.

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 docker-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/duck4nh/antigravity-kit/docker-expert.svg)](https://agentmods.dev/skills/duck4nh/antigravity-kit/docker-expert)
Your own site
<a href="https://agentmods.dev/skills/duck4nh/antigravity-kit/docker-expert"><img src="https://agentmods.dev/badge/skills/duck4nh/antigravity-kit/docker-expert.svg" alt="Measured on agentmods" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,243 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin fork From a forked repository.
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 $0.00060 $0.03243
Opus 5 $0.00030 $0.01622
Sonnet 5 $0.00012 $0.00649
Haiku 4.5 $0.00006 $0.00324

Measured 5d ago against content hash e33b08feeaa8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

docker-expert scanned grade A with 1 finding 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 5d 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.

Makes network callslowCapability

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

CMD curl -f http://localhost:3000/health || exit 1
templates/.agent/skills/docker-expert/SKILL.md · 409 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. 5d ago First seen · 409 lines · 60 tokens per session scan A e33b08feeaa8

Subscribe to this mod's changes

docker-expert is a skill published in the GitHub repository duck4nh/antigravity-kit (15 stars, last pushed 6mo ago), with no licence file. It adds 60 tokens to every session and 3,243 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It comes from a forked repository.

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