Agent skill

Docker

by avibebuilder in avibebuilder/claude-prime

ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills.

Install Docker

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/starter-skills/docker .claude/skills/docker && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .claude/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/starter-skills/docker .agents/skills/docker && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .agents/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/starter-skills/docker .cursor/skills/docker && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .cursor/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/avibebuilder/claude-prime.git --path .claude/starter-skills/docker

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/starter-skills/docker .gemini/skills/docker && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .gemini/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/starter-skills/docker .github/skills/docker && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .github/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add avibebuilder/claude-prime --skill docker -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install avibebuilder/claude-prime docker --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/avibebuilder/claude-prime.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/starter-skills/docker .opencode/skills/docker && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "docker" agent skill from https://github.com/avibebuilder/claude-prime/tree/main/.claude/starter-skills/docker into .opencode/skills/docker/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "docker", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: docker
GitHub stars: 120
Token cost: ~1k tokens
SKILL.md length: 421 words
Files: 5 (incl. references)
Skills in repo: 19
Repo updated: May 16, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills.

Works in 4 steps: Minimal base images — Use slim/alpine… → Multi-stage builds — Separate build… → Layer optimization — Combine RUN… → …
S query involves Docker in any way — even if it also matches other skills
SKILL.md covers Architecture Decisions, Gotchas and References
Calls docker, apk and sh

What it does

Docker is an agent skill from avibebuilder/claude-prime. ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills. If the words docker, Dockerfile, docker-compose, compose.yml, container, or image appear in the query, this skill MUST be used. Covers: writing or editing Dockerfiles and compose files, adding services (postgres, redis, etc.) to compose, volume mounts and data persistence, docker build failures (layer caching, npm install issues), healthchecks and service startup ordering (dependson), environment variables in…

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/compose.md`, `references/dockerfile.md` and `references/production.md`).

It sits in DevOps & Cloud, covering Containers. It works with Docker, npm, PostgreSQL and Redis. The repository describes itself as: You've heard Claude Code can do amazing things. Skills, hooks, agents, memory systems — but who has time to figure all that out? Claude Prime sets it up for you in one command. The licence is MIT.

When your agent uses it

S query involves Docker in any way — even if it also matches other skills
Tasks that involve Containers

Example prompts

“Use the docker skill to alway activate when the user's query involves Docker in any way — even if it also matches other skills”
“/docker”

Requirements

Python 3
Node.js
Docker

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Minimal base images — Use slim/alpine variants; pin to digest for reproducibility.
Multi-stage builds — Separate build dependencies from runtime.
Layer optimization — Combine RUN commands; place frequently changed files last.
COPY over ADD — ADD only for tar extraction or remote URLs.

What it can do on your machine

Read from SKILL.md and the folder at commit 80bcfa4. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- docker
- apk
- sh
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use docker, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Docker loads about 1k tokens when it runs, and up to ~3k if it reads all its reference files. Until then it costs about 202 tokens; SKILL.md has 421 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~202
When it runs · the whole SKILL.md, loaded when a task matches: ~1k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NoteMentions a .env fileSKILL.md:21

.dockerignore required** — Exclude .git, .env, node_modules, build artifacts.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from avibebuilder/claude-prime at commit 80bcfa4, republished under its MIT licence (© avibebuilder). 421 words, ~1,048 tokens.

Download SKILL.mdSave it as .claude/skills/docker/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.

name: docker
description: ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills. If the words docker, Dockerfile, docker-compose, compose.yml, container, or image appear in the query, this skill MUST be used. Covers: writing or editing Dockerfiles and compose files, adding services (postgres, redis, etc.) to compose, volume mounts and data persistence, docker build failures (layer caching, npm install issues), healthchecks and service startup ordering (depends_on), environment variables in containers, port mapping, container crashes and exit codes (OOM/137), non-root users, multi-stage builds, image optimization, .dockerignore, and deploying to container runtimes. Takes priority over general implementation or debugging skills when Docker infrastructure is the subject.

Docker

Project-specific containerization patterns for Dockerfile and Docker Compose.

Architecture Decisions

Image Building

Minimal base images — Use slim/alpine variants; pin to digest for reproducibility.
Multi-stage builds — Separate build dependencies from runtime.
Layer optimization — Combine RUN commands; place frequently changed files last.
COPY over ADD — ADD only for tar extraction or remote URLs.

Security

Non-root users — Always use UID >10000; never run as root in production.
No secrets in images — Use Docker secrets or runtime env injection.
.dockerignore required — Exclude .git, .env, node_modules, build artifacts.

Runtime

One process per container — Single responsibility principle.
Healthchecks required — Define HEALTHCHECK in Dockerfile or Compose.
Resource limits — Always set mem_limit and cpus in production.

Compose

Network segmentation — Dedicated networks per service group.
Named volumes — Never use anonymous volumes in production.
depends_on with healthchecks — Use condition: service_healthy.
Environment separation — Use override files for dev/staging/prod.

Gotchas

COPY . . before RUN npm install busts the cache on EVERY code change. Copy package*.json first, install, THEN copy source.
Alpine uses musl libc, not glibc. Python packages with C extensions (numpy, pandas, cryptography) may fail to install or need apk add build dependencies. Consider -slim variants if you hit this.
ENTRYPOINT ["python", "app.py"] (exec form) handles signals correctly. ENTRYPOINT python app.py (shell form) wraps in /bin/sh -c and PID 1 won't receive SIGTERM — containers take 10s to stop.
Docker layer cache is invalidated from the FIRST changed layer downward. A changed COPY near the top rebuilds everything below it.
depends_on without condition: service_healthy only waits for container START, not readiness. Your app will crash connecting to a database that's still initializing.
host.docker.internal works on Docker Desktop (Mac/Windows) but NOT on Linux. Use --network host or explicit container networking on Linux.
Build args (ARG) are NOT available after FROM in multi-stage builds unless re-declared. Each stage starts fresh.
docker compose up reuses existing containers. After changing Dockerfile, you need docker compose up --build or docker compose build first.
Volume mounts override the container's filesystem — if your node_modules are built inside the container but you mount .:/app, the host's (possibly empty) node_modules shadows them. Use a named volume for node_modules.
EXPOSE is documentation only — it does NOT publish the port. You still need -p 8080:8080 or ports: in compose.
Docker's default bridge network does NOT provide DNS resolution between containers. Use a custom network or compose's default network.

Show full SKILL.md (22 more words)Show less

References

When you need...	Read
Dockerfile patterns, CMD vs ENTRYPOINT	dockerfile.md
Compose services, networks, volumes	compose.md
Security hardening	security.md
Production deployment	production.md

Files

SKILL.md and 4 other files (references) in .claude/starter-skills/docker of avibebuilder/claude-prime.

SKILL.md
references/compose.md
references/dockerfile.md
references/production.md
references/security.md

Open the folder on GitHubat commit 80bcfa4

Compare with similar skills

Docker next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Docker compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Docker this skillavibebuilder/claude-prime	120	—	~1k	Automated safety check: Notes	MIT	4 mo ago
Docker Deploymentfossasia/eventyay	1.7k	—	~574	Automated safety check: Notes	Apache-2.0	today
Code PatternsAedelon/claude-code-blueprint	120	—	~1.2k	Automated safety check: Pass	Custom licence	7 mo ago
Acarshub Tool Additionssdr-enthusiasts/docker-acarshub	117	—	~707	Automated safety check: Pass	GPL-3.0	3 days ago
Env Troubleshoot312362115/claude	107	—	~900	Automated safety check: Warn	MIT	4 mo ago
Deploymentericrisco/rsc-harness	156	—	~4.2k	Automated safety check: Notes	MIT	yesterday

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Questions about Docker

What does Docker do?

ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills. Docker is an agent skill from avibebuilder/claude-prime. ALWAYS activate when the user's query involves Docker in any way — even if it also matches other skills.

When should I use Docker?

Docker fits situations like: S query involves Docker in any way — even if it also matches other skills; tasks that involve Containers.

How do I install Docker in Claude Code?

Run `npx skills add avibebuilder/claude-prime --skill docker -a claude-code`. Or copy the skill folder (.claude/starter-skills/docker in avibebuilder/claude-prime) into .claude/skills/docker in your project. Claude Code loads it when a task matches its description.

How do I install Docker in Codex?

Run `npx skills add avibebuilder/claude-prime --skill docker -a codex`. Or copy the skill folder (.claude/starter-skills/docker in avibebuilder/claude-prime) into .agents/skills/docker in your project. Codex loads it when a task matches its description.

Can I use Docker in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add avibebuilder/claude-prime --skill docker -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/docker, .gemini/skills/docker, .github/skills/docker and .opencode/skills/docker in your project.

What does Docker need to run?

Going by SKILL.md and its folder, Docker needs the command-line tools its instructions call (docker, apk and sh). Our summary lists: Python 3; Node.js; Docker.

Does Docker access the network?

SKILL.md contains no URLs. Its commands use docker, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Docker safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Docker use?

Docker is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Docker use?

About 1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2k tokens, read only when the agent opens those files.

What are the alternatives to Docker?

Skills that share tags, products or a category with Docker: Docker Deployment (fossasia/eventyay, 1.7k stars), Code Patterns (Aedelon/claude-code-blueprint, 120 stars), Acarshub Tool Additions (sdr-enthusiasts/docker-acarshub, 117 stars) and Env Troubleshoot (312362115/claude, 107 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Docker?

avibebuilder (a GitHub organization) maintains it in avibebuilder/claude-prime, which has 120 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on May 16, 2026.

Source: avibebuilder/claude-prime on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Docker

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Docker

Architecture Decisions

Image Building

Security

Runtime

Compose

Gotchas

References

Files

Compare with similar skills

Similar skills

More from avibebuilder/claude-prime

Related

Questions about Docker