docker

Guidance for packaging applications in Docker containers, which bundle software with the files it needs to run. It covers Dockerfiles, Docker Compose, image size, security, networking, and deployment.

In plain words
What is it for?
Use it to improve Dockerfiles, reduce image size, harden container security, configure networks, set up Docker Compose, or prepare containers for production.
Why use it?
It helps address common container problems, such as oversized images, unsafe settings, networking errors, and difficult multi-container setups. Docker Compose is a tool for defining and running several related containers together.

Skill for Claude CodeCodex

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

Made for: Claude Code, Codex.

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,492 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. Scan, not verified.
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 $0.00098 $0.02492
Opus 5 $0.00049 $0.01246
Sonnet 5 $0.00020 $0.00498
Haiku 4.5 $0.00010 $0.00249

Measured 2d ago against content hash d2e68163368e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docker scanned grade A 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 2d 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 rootlowPrivilege escalation

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

- **NEVER run as root** - Create and use non-root users with specific UID/GID

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

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

CMD wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1
skills/devops/docker/SKILL.md · 421 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. 2d ago First seen · 421 lines · 98 tokens per session scan A d2e68163368e

Subscribe to this mod's changes

docker is a skill published in the GitHub repository wpank/ai (11 stars, last pushed 6mo ago), with no licence file. It adds 98 tokens to every session and 2,492 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A 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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