Docker Local Development Agent Skill

Coordinator-routed specialist for creating, repairing, or materially extending local-development Docker Compose, Dockerfiles, databases…

Context cost
15.3k tokensestimated from the bundle, loaded when it triggers
Bundle
22 files · 110.7 kB7 scripts among them — read before you run
Licence
Apache-2.0the author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Create or repair local Docker Compose services, Dockerfiles, mounts, networking, and readiness checks. Use when container configuration is the deliverable; ordinary container commands and production deployment are separate concerns.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

devopsdocker
Filed under

Cloud & DevOps

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md9.6 kB · preview
--- name: docker-local-dev ---
6# Docker Local Development
7
8## Delegation
9
10Run in the main conversation by default. Delegation can increase usage: obtain explicit approval for the proposed agent count and scope before using subagents. Reuse that approval within its bounds; ask again before expanding the approved count or scope.
11
12## Guardrails
13
14- Design for local development. Keep production images, secrets, deployment, certificates, and runtime topology separate.
15- Inspect before asking questions or proposing services. Treat detection as evidence, not authority.
16- Preserve existing Docker files and unrelated working-tree changes. Keep a semantic diff for material stack changes. Ordinary configuration edits are covered by a setup or repair request; volume deletion, destructive resets, and data migrations need authorization covering those effects.
17- Generate only services the project uses or the user explicitly requests. A database is not mandatory when the project uses SQLite, a host service, or an external database.
18- Prefer direct foreground commands and one concern per service. Add Supervisor or PM2 only when the project already requires it or production-parity testing justifies it.
19- Prefer a stable top-level Compose name: and role-based service names. Do not set container_name by default because it prevents service scaling and creates cross-project collisions.
20- Select images by project constraints, team or production compatibility, trusted publisher, supported version, and architecture. Treat an already-downloaded image only as a tie-breaker. Avoid floating latest tags in generated files.
21- Publish only ports needed by the host. Bind local-only ports to 127.0.0.1 by default; keep databases, caches, SMTP, PHP-FPM, and internal APIs unexposed when possible.
22- Keep secrets out of committed files, generated documentation, command output, and frontend or proxy containers. Generate an ignored local env file plus a safe example when configuration is needed.
23
24## Workflow
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md1,289 words
Files22
LicenceApache-2.0
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈70
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
15,205
on trigger
The instruction body and 21 supporting files, read only when the skill fires.
7.6%
of a 200k window
Ten skills this size would take about 76% of the window before you open a file.
050k100k150k200k context window

15.3k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

22 files, 110.7 kB on disk. Mostly text — the instructions the model reads — with 7 scripts in it that your client would run only if the instructions tell it to. 16 files of its source are not in the download — listed after these, with why.

  • SKILL.md9.6 kB
  • agents/openai.yaml0.2 kB
  • references/cms-configuration-guide.md4.0 kB
  • references/health-check-patterns.md4.3 kB
  • references/merge-backup-strategy.md3.2 kB
  • references/networking-ports-guide.md5.9 kB
  • references/service-configuration-guide.md9.4 kB
  • references/tech-stack-detection.md4.4 kB
  • scripts/db-test.sh5.1 kB
  • scripts/detect-images.sh2.1 kB
  • scripts/detect-network.sh2.9 kB
  • scripts/detect-stack.sh13.3 kB
  • scripts/health-check.sh2.8 kB
  • scripts/port-check.sh5.2 kB
  • scripts/scan-host-ports.mjs18.2 kB
  • assets/templates/docker-compose/base.yml0.3 kB
  • assets/templates/docker-compose/node.yml3.9 kB
  • assets/templates/docker-compose/php-drupal.yml3.1 kB
  • assets/templates/docker-compose/php-joomla.yml2.6 kB
  • assets/templates/docker-compose/php-laravel.yml2.0 kB
  • assets/templates/docker-compose/php-wordpress.yml3.8 kB
  • assets/templates/docker-compose/python.yml4.4 kB

Not in the download

Not carried is a type a skill download does not hold. Take them from its source.

  • assets/templates/dockerfile/node.dockerfilenot carried
  • assets/templates/dockerfile/php-drupal.dockerfilenot carried
  • assets/templates/dockerfile/php-joomla.dockerfilenot carried
  • assets/templates/dockerfile/php-laravel.dockerfilenot carried
  • assets/templates/dockerfile/php-wordpress.dockerfilenot carried
  • assets/templates/dockerfile/python-django.dockerfilenot carried
  • assets/templates/dockerfile/python-fastapi.dockerfilenot carried
  • assets/templates/docs/COMMANDS.md.templatenot carried
  • assets/templates/docs/USAGE.md.templatenot carried
  • assets/templates/nginx/drupal.confnot carried
  • assets/templates/nginx/joomla.confnot carried
  • assets/templates/nginx/laravel.confnot carried
  • assets/templates/nginx/node-proxy.confnot carried
  • assets/templates/nginx/python-wsgi.confnot carried
  • assets/templates/nginx/wordpress.confnot carried
  • assets/templates/wordpress/wp-config-docker.phpnot carried
What is not in it

A skill installs nothing and depends on nothing: it is a folder your client reads. This one carries 7 scripts beside the text, so the download is 22 files — not the whole of its source: 16 files are left out. They are listed under the files, with why. The Apache-2.0 licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Docker Local Development · 15.3k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/docker-local-development/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/docker-local-development" ] && { [ ! -e .claude/skills/docker-local-development ] || { mv .claude/skills/docker-local-development "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/docker-local-development" .claude/skills/ && echo "Installed .claude/skills/docker-local-development"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add thienanblog/docker-local-development

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/docker-local-development/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/docker-local-development/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/docker-local-development" ] && { [ ! -e ~/.claude/skills/docker-local-development ] || { mv ~/.claude/skills/docker-local-development "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/docker-local-development" ~/.claude/skills/ && echo "Installed ~/.claude/skills/docker-local-development" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/docker-local-development/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. It appears as docker-local-dev in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, docker-local-development. Not in this download: 16 files of its source (the full list, and why). Take them from its source.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencethienanblog/docker-local-development

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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