docker-expert

docker-expert is a skill for Claude Code from sinhoneyy/master-skills. It costs 44 tokens per session (3,317 once invoked), scanned A, original, no licence file.

A skill for building and improving Docker containers, which package an application and its dependencies into a portable runtime environment. It covers optimization, security, multi-stage builds, orchestration, and production deployment.

In plain words
What is it for?
Use it to design Docker images, reduce their size, harden them, structure multi-stage builds, and prepare containerized applications for deployment.
Why use it?
It helps address common container problems such as oversized images, unsafe settings, and inefficient builds.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the master-skills-ai-agent-builder plugin — 195 skills, 1 plugin shipped together

Good fit Use it to design Docker images, reduce their size, harden them, structure multi-stage builds, and prepare containerized applications for deployment.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sinhoneyy/master-skills/docker-expert
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.

Any agent
npx skills add sinhoneyy/master-skills --skill docker-expert
Clone the repo
git clone --depth 1 https://github.com/sinhoneyy/master-skills

Made for: Claude Code.

Or install master-skills-ai-agent-builder, the plugin that ships this one along with the rest of its 195 skills, 1 plugin.

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/sinhoneyy/master-skills/docker-expert/github.svg)](https://agentmods.dev/skills/sinhoneyy/master-skills/docker-expert)
Your own site
<a href="https://agentmods.dev/skills/sinhoneyy/master-skills/docker-expert"><img src="https://agentmods.dev/badge/skills/sinhoneyy/master-skills/docker-expert/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 docker-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/sinhoneyy/master-skills/docker-expert"><img src="https://agentmods.dev/badge/skills/sinhoneyy/master-skills/docker-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,317 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00044 $0.03317
Opus 5.5 $0.00018 $0.01327
Sonnet 5.5 $0.00009 $0.00663
Haiku 4.5 $0.00004 $0.00332

Measured 1mo ago against content hash cd2817407c2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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
plugins/master-skills-ai-agent-builder/skills/docker-expert/SKILL.md · 419 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. 1mo ago First seen · 419 lines · 44 tokens per session scan A cd2817407c2f

Subscribe to this mod's changes

docker-expert is a skill published in the GitHub repository sinhoneyy/master-skills (14 stars, last pushed 1mo ago), with no licence file. It adds 44 tokens to every session and 3,317 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.

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