docker

docker is a skill for Claude Code, Codex from dayfinggg/openai-codex-agent-skills. It costs 24 tokens per session (271 once invoked), scanned A, original, MIT.

A guide to packaging an application in Docker containers and configuring Docker Compose services. Containers run an application with its dependencies in an isolated environment, while Compose describes multiple services and their connections.

In plain words
What is it for?
Use it to add Docker support, write or optimize Dockerfiles, build images, configure Compose services, or diagnose service dependencies and health checks.
Why use it?
It helps create or change container builds without accidentally altering runtime behavior, secrets, networks, volumes, or unrelated running services.

Skill for Claude CodeCodex

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

Good fit Use it to add Docker support, write or optimize Dockerfiles, build images, configure Compose services, or diagnose service dependencies and health checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dayfinggg/openai-codex-agent-skills/docker
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 dayfinggg/openai-codex-agent-skills --skill docker
Clone the repo
git clone --depth 1 https://github.com/dayfinggg/openai-codex-agent-skills

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 docker

README.md
[![agentmods](https://agentmods.dev/badge/skills/dayfinggg/openai-codex-agent-skills/docker/github.svg)](https://agentmods.dev/skills/dayfinggg/openai-codex-agent-skills/docker)
Your own site
<a href="https://agentmods.dev/skills/dayfinggg/openai-codex-agent-skills/docker"><img src="https://agentmods.dev/badge/skills/dayfinggg/openai-codex-agent-skills/docker/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

Your own site · 80×15
<a href="https://agentmods.dev/skills/dayfinggg/openai-codex-agent-skills/docker"><img src="https://agentmods.dev/badge/skills/dayfinggg/openai-codex-agent-skills/docker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 271 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 $0.00024 $0.00271
Opus 5.5 $0.00010 $0.00108
Sonnet 5.5 $0.00005 $0.00054
Haiku 4.5 $0.00002 $0.00027

Measured today against content hash b2ba132420ea, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

docker 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 today.

The scan reads SKILL.md. This mod also ships 3 executable files (references/build/scripts/verify-build.sh, references/compose/scripts/verify-compose.sh, references/project/scripts/verify-setup.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

codex/skills/docker/SKILL.md · 22 lines

What it actually says

Choose the Docker workflow from the state of the project and the requested change. Preserve the application's runtime and existing deployment choices.

Read host integration once for resource paths and shell handling.

Task Read
Add the project's initial Docker setup Project foundations
Change a Dockerfile, image build, cache strategy, or build-secret handling Image builds
Wire or diagnose services, health dependencies, networks, volumes, or overrides Compose

When first-time containerization also needs build and Compose work, start with project foundations and then load only the relevant additional procedure. Existing projects normally go directly to the procedure that owns the change.

Keep the complete scripts, templates, and verification checklists inside their procedure bundles. Run a helper from the application working directory specified by its usage, while resolving the helper's path from its bundle directory.

A configuration-only request does not authorize starting services or building arbitrary images. Perform the checks needed for the authorized outcome and preserve unrelated containers, images, and volumes.

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. today First seen · 22 lines · 24 tokens per session scan A b2ba132420ea

Subscribe to this mod's changes

docker is a skill published in the GitHub repository dayfinggg/openai-codex-agent-skills (8 stars, last pushed today), licensed MIT. It adds 24 tokens to every session and 271 once invoked, about $0.0001 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 2026-10-30.