devops-dockerfile-optimizer

A guide for improving Dockerfiles, which are recipe files used to build container images. It covers smaller images, faster builds, multi-stage builds, and non-root containers.

In plain words
What is it for?
Use it to optimize a Dockerfile, reduce image size, speed up rebuilds, add build stages, or harden a container by running it as a non-root user.
Why use it?
It helps address oversized images, slow builds, missed build caches, and containers that run with excessive privileges.

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/ieeecsopen/mcp-cs/devops-dockerfile-optimizer
Any agent
npx skills add ieeecsopen/mcp-cs --skill devops-dockerfile-optimizer
Clone the repo
git clone --depth 1 https://github.com/ieeecsopen/mcp-cs

Made for: Claude Code, Codex.

Per session 264 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,403 The whole file, excluding the scripts and references it only reads on demand.
Security scan F 4 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 $0.00264 $0.08403
Opus 5 $0.00132 $0.04202
Sonnet 5 $0.00053 $0.01681
Haiku 4.5 $0.00026 $0.00840

Measured 2d ago against content hash ac344cf570c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade F, and why

devops-dockerfile-optimizer scanned grade F with 4 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 rootmediumPrivilege escalation

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

does not run as root).

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

`curl ... | sh`), so a failed `curl` doesn't silently succeed the layer.

Recursive force deletehighDestructive command

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

cache → not chaining `apt-get update && apt-get install && rm -rf

Makes network callslowCapability

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

`curl ... | sh`), so a failed `curl` doesn't silently succeed the layer.
.agents/skills/devops-dockerfile-optimizer/SKILL.md · 687 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 · 687 lines · 264 tokens per session scan F ac344cf570c2

Subscribe to this mod's changes

devops-dockerfile-optimizer is a skill published in the GitHub repository ieeecsopen/mcp-cs (3 stars, last pushed 6d ago), with no licence file. It adds 264 tokens to every session and 8,403 once invoked, about $0.0013 per session on Opus 5. A static security scan graded it F with 4 findings (asks for root, downloads and executes remote code, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.