oaustegard/claude-skills · plugins/environment-and-config/skills/container-layer/SKILL.md

container-layer skillA

container-layer is agent-read markdown (skill) from oaustegard/claude-skills: Authors and caches a personalized container environment from a Dockerfile- like spec, as a single layer or as a composition of independently cached layers. Use when the user mentions "container layer", "Containerfile", "custom container", "cache my installs", "composable layers", "uv shim", or wants package installations, skills and environment config to survive an ephemeral session. Also for snapshotting, restoring or rebuilding that environment, and for capturing ad-hoc installs into a reprodu.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add oaustegard/claude-skills/container-layer@v0.4.0
Exact content
mdr add oaustegard/claude-skills/container-layer@sha256:6708e792ebe9a902

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_ep5icvgkd6seunjt.svg)](https://markdownregistry.com/a/art_ep5icvgkd6seunjt)

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Versions

versioncommittedcommitsizeaudit
v0.4.0 latest2026-08-25 04bfd5b 5,794 BA view · diff
v0.2.32026-08-25 59ad255 5,490 BA view · diff
v0.2.22026-07-07 6154d36 5,490 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (5794 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

GitHub

oaustegard/claude-skills · 148 stars · license MIT · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ep5icvgkd6seunjt
GET https://markdownregistry.com/api/v1/resolve?ref=oaustegard/claude-skills/container-layer
GET https://markdownregistry.com/api/v1/blob/6708e792ebe9a90282f6012586dc19561b6664e4ab55053c47557b0150bef76b

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.