ubuntu-cloud-init SKILL.md skillB
ubuntu-cloud-init from air-gapped/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add air-gapped/skills/ubuntu-cloud-init@git:20261019.cc7b312Pins git:20261019.cc7b312 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- air-gapped/skills
- Path
.claude/skills/ubuntu-cloud-init/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261019.0176481, committed Oct 19, 2026
- First version recorded
- Jun 14, 2026
- Size
- 12,118 bytes
- Repository stars
- 6
- License
- MIT
Author, validate, and debug cloud-init configuration for Ubuntu Server LTS 24.04 and 26.04, focused on on-premise and air-gapped hosts via the NoCloud datasource — `#cloud-config` user-data, the cloud-config modules (users, ssh, write_files, runcmd, apt with local mirrors, ca_certs for internal CAs, ntp, disk_setup), NoCloud seeding (seed dir, `cidata` ISO, `ds=nocloud;s=...` kernel cmdline, SMBIOS serial), boot stages, and pinning `datasource_list`. Public-cloud datasources (EC2/Azure/GCE…)…
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
# ubuntu-cloud-init cloud-init runs early in boot, reads configuration from a **datasource**, and applies it through **modules** across four boot stages. This skill is authoring-led (produce correct cloud-config from a description) with a strong validation/debug path, aimed at **on-prem / air-gapped Ubuntu Server LTS** using the **NoCloud** datasource. Versions: Ubuntu SRUs new upstream releases to every supported LTS, so an updated 24.04 and an updated 26.04 run the same cloud-init (26.1 in `-updates`). 24.04's package patches out several upstream breaking changes; 26.04's carries none. Check the host before assuming behaviour: `dpkg -s cloud-init | grep Version` (`~24.04` suffix = patched noble build). ## Authoring workflow 1. **Identify the goal & datasource.** On-prem/air-gapped → **NoCloud** (seed dir, `cidata` ISO/USB, HTTP seed, or SMBIOS serial). Pin `datasource_list: [NoCloud]` to stop cloud-init probing cloud metadata services and timing out. 2. **Choose the user-data format** — almost always `#cloud-config`. Use MIME multipart only to combine cloud-config with scripts. (Formats table below.) …
Read the whole file at its exact version.
How to install
mdr add air-gapped/skills/ubuntu-cloud-init@sha256:43e000ed167a082aThe line at the top of this page pins the label git:20261019.cc7b312, 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_lluvgxz3of5qkwcg)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jun 14, 2026 and Oct 19, 2026, about one every 21 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.0176481 latest | 2026-10-19 | 0176481 | 12,118 B | B | view · diff |
| git:20261019.377056a | 2026-10-19 | 377056a | 12,005 B | B | view · diff |
| git:20261019.6218fd1 | 2026-10-19 | 6218fd1 | 11,586 B | B | view · diff |
| git:20261019.cc7b312 | 2026-10-19 | cc7b312 | 12,533 B | B | view · diff |
| git:20261019.cf3bc80 | 2026-10-19 | cf3bc80 | 12,637 B | B | view · diff |
| git:20260721.d6a4244 | 2026-07-21 | d6a4244 | 12,409 B | B | view · diff |
| git:20260614.900b4d1 | 2026-06-14 | 900b4d1 | 9,992 B | B | view |
Audit of the latest version
- fail: No link to a raw IP address (matched: http://10.0.0.1:8000)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12118 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
air-gapped/skills · 6 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lluvgxz3of5qkwcg GET https://markdownregistry.com/api/v1/resolve?ref=air-gapped/skills/ubuntu-cloud-init GET https://markdownregistry.com/api/v1/blob/43e000ed167a082a4a72955373d12541e58ed75e7d3f489610933ce136e26602
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.