container-standards

container-standards is a skill for Claude Code, Codex from Goldziher/ai-rulez. It costs 101 tokens per session (222 once invoked), scanned A, original, MIT.

A set of rules for building and running container images, which package an application and its dependencies for consistent deployment. It covers smaller images, safer defaults, health checks, caching, and version tags.

In plain words
What is it for?
Use it when writing or reviewing Dockerfiles and container release settings. It guides multi-stage builds, dependency-layer ordering, vulnerability checks, process startup, health checks, and image tagging.
Why use it?
It reduces common container risks such as running as an administrator, putting secrets in images, missing health checks, and shipping known high-severity vulnerabilities. It also helps avoid slow rebuilds and unclear image versions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when writing or reviewing Dockerfiles and container release settings. It guides multi-stage builds, dependency-layer ordering, vulnerability checks, process startup, health checks, and image tagging.

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Install with agentmods
npx agentmods add skills/goldziher/ai-rulez/container-standards
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 Goldziher/ai-rulez --skill container-standards
Clone the repo
git clone --depth 1 https://github.com/Goldziher/ai-rulez

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 container-standards

README.md
[![agentmods](https://agentmods.dev/badge/skills/goldziher/ai-rulez/container-standards/github.svg)](https://agentmods.dev/skills/goldziher/ai-rulez/container-standards)
Your own site
<a href="https://agentmods.dev/skills/goldziher/ai-rulez/container-standards"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/container-standards/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 container-standards

Your own site · 80×15
<a href="https://agentmods.dev/skills/goldziher/ai-rulez/container-standards"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/container-standards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 222 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00101 $0.00222
Opus 5.5 $0.00040 $0.00089
Sonnet 5.5 $0.00020 $0.00044
Haiku 4.5 $0.00010 $0.00022

Measured 19d ago against content hash 89967db8b313, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

container-standards scanned grade A with 0 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 19d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

internal/builtins/universal/docker/skills/container-standards/SKILL.md · 11 lines

What it actually says

  • Multi-stage builds: full toolchain builder → minimal runtime (Alpine/Distroless/Scratch).
  • Layer caching: copy dependency manifests first, then source — maximize cache hits.
  • Security: non-root user, vulnerability scanning (fail on HIGH/CRITICAL), no secrets in the image.
  • Signal handling: use an init process (tini/dumb-init) as PID 1, and define a HEALTHCHECK.
  • Tagging: semantic version + commit SHA, never reuse a tag.
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. 19d ago First seen · 11 lines · 101 tokens per session scan A 89967db8b313

Subscribe to this mod's changes

container-standards is a skill published in the GitHub repository Goldziher/ai-rulez (163 stars, last pushed yesterday), licensed MIT. It adds 101 tokens to every session and 222 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-28.