docker-development

A Docker development skill for working with containers, which package software and its environment together. It covers Dockerfiles and Docker Compose, a tool for defining multi-container applications.

In plain words
What is it for?
It is for optimizing Dockerfiles, creating Docker Compose setups, building multi-stage images, and hardening container security.
Why use it?
It helps improve container builds and configurations while addressing container security concerns.

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/bish-x/bx-dev-skill/docker-development
Any agent
npx skills add bish-x/bx-dev-skill --skill docker-development
Clone the repo
git clone --depth 1 https://github.com/bish-x/bx-dev-skill

Made for: Claude Code, Codex.

Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,784 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00084 $0.02784
Opus 5 $0.00042 $0.01392
Sonnet 5 $0.00017 $0.00557
Haiku 4.5 $0.00008 $0.00278

Measured 2d ago against content hash 7d52e3f31be9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

docker-development scanned grade B 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 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.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- **apt-get without cleanup in same layer** → `rm -rf /var/lib/apt/lists/*` in the same RUN.

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

skills/bx-dev/skill-library/backend/docker-development/SKILL.md · 330 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

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 330 lines · 84 tokens per session scan B 7d52e3f31be9

Subscribe to this mod's changes

docker-development is a skill published in the GitHub repository bish-x/bx-dev-skill (23 stars, last pushed 2mo ago), with no licence file. It adds 84 tokens to every session and 2,784 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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