containerfile-creator SKILL.md skillA
containerfile-creator from jim60105/copilot-prompt is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jim60105/copilot-prompt/containerfile-creator@git:20260721.6abbad9Pins git:20260721.6abbad9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jim60105/copilot-prompt
- Path
skills/containerfile-creator/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260721.6abbad9, committed Jul 21, 2026
- First version recorded
- May 25, 2026
- Size
- 13,493 bytes
- Repository stars
- 22
- License
- GFDL-1.3
Create high-quality, secure, and performance-optimized Containerfiles (Dockerfiles) following best practices for multi-architecture builds, OpenShift/Kubernetes compatibility, and BuildKit cache optimization. Use when the user wants to: (1) create a new Containerfile or Dockerfile for any project (Python, Rust, Go, Node.js, .NET, or any language), (2) containerize an application with multi-stage builds, (3) optimize an existing Containerfile for security, performance, or image size, (4) review…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Containerfile Creator Create secure, efficient, and maintainable container images following open source best practices. ## Workflow 1. Determine the project language/framework 2. Check host environment for SELinux enforcement (e.g. `getenforce`) if using Podman/Buildah 3. Load the appropriate reference file for examples (see Language-Specific References below) 4. Apply the core structure and patterns from this document 5. Write the Containerfile following the Final Stage Instruction Ordering ## File Naming - Prefer `Containerfile` over `Dockerfile` - Use descriptive names for variants: `alpine.Containerfile`, `distroless.Containerfile`, `ubi.Containerfile` ## Required Syntax Declaration Every file MUST start with: ```containerfile # syntax=docker/dockerfile:1 ``` ## ARG Definition Block Only `UID`, `VERSION`, and `RELEASE` go at the top level: ```containerfile # syntax=docker/dockerfile:1 ARG UID=1001 ARG VERSION=EDGE ARG RELEASE=0 ``` `TARGETARCH` and `TARGETVARIANT` MUST be declared inside each stage that uses them, not globally. ## Multi-stage Build Structure ```containerfile ######################################## # Build stage …
Read the whole file at its exact version.
How to install
mdr add jim60105/copilot-prompt/containerfile-creator@sha256:6b71b30834d5c8b9The line at the top of this page pins the label git:20260721.6abbad9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_eh3qgxkr43vsbfil)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between May 25, 2026 and Jul 21, 2026, about one every 28 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260721.6abbad9 latest | 2026-07-21 | 6abbad9 | 13,493 B | A | view · diff |
| git:20260525.d5d181c | 2026-05-25 | d5d181c | 11,658 B | A | view · diff |
| git:20260525.2b3416c | 2026-05-25 | 2b3416c | 11,625 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13493 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jim60105/copilot-prompt · 22 stars · license GFDL-1.3 · pushed 2026-10-16 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_eh3qgxkr43vsbfil GET https://markdownregistry.com/api/v1/resolve?ref=jim60105/copilot-prompt/containerfile-creator GET https://markdownregistry.com/api/v1/blob/6b71b30834d5c8b9ad2648c55d34559cc2673a6f26763a61192f4cd2ac02fda5
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.