ubuntu-autoinstall SKILL.md skillA
ubuntu-autoinstall 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-autoinstall@git:20261019.3b8fae6Pins git:20261019.3b8fae6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- air-gapped/skills
- Path
.claude/skills/ubuntu-autoinstall/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261019.0101b8c, committed Oct 19, 2026
- First version recorded
- Jun 14, 2026
- Size
- 10,873 bytes
- Repository stars
- 6
- License
- MIT
Author, validate, and debug Ubuntu Server autoinstall configuration (the Subiquity installer's `autoinstall:` schema, version 1) for Ubuntu Server LTS 24.04 and 26.04, focused on unattended on-premise and air-gapped installs — identity, storage (LVM/direct/ZFS/encryption/RAID), apt mirror-selection + proxy + offline fallback, ssh, packages, kernel, late-commands/early-commands, and zero-touch delivery via a NoCloud seed. The `network:` block is netplan v2 (use the ubuntu-netplan skill); the…
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-autoinstall Autoinstall **nests the other two domains**: - its `network:` key is **netplan v2** → use the **ubuntu-netplan** skill; - its `user-data:` key is **cloud-config for the installed system** → use the **ubuntu-cloud-init** skill; - and the config is itself **delivered via cloud-init NoCloud**. See **The two delegation boundaries** and **Delivery**. ## Authoring workflow 1. **Pick the delivery method** (Delivery, below). Air-gapped → usually a NoCloud seed on the ISO/USB or an HTTP seed. 2. **Write the `version: 1` document.** `version` is the only schema-required key, but `identity` is required at *runtime* unless `user-data:` is present. 3. **Set the air-gapped essentials** — local mirror, proxy, offline fallback (see the Air-gapped essentials section below for the exact keys). 4. **Author `network:`** as netplan v2 (ubuntu-netplan skill) and any installed-system first-boot config under `user-data:` (ubuntu-cloud-init skill). 5. **Validate** with the subiquity repo's `validate-autoinstall-user-data.py` (see Validation — the script ships in the installer source, not in this skill). …
Read the whole file at its exact version.
How to install
mdr add air-gapped/skills/ubuntu-autoinstall@sha256:d7b63a2c99e0a6c0The line at the top of this page pins the label git:20261019.3b8fae6, 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_6lxpnjojyh7zodm3)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Jun 14, 2026 and Oct 19, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.0101b8c latest | 2026-10-19 | 0101b8c | 10,873 B | A | view · diff |
| git:20261019.3b8fae6 | 2026-10-19 | 3b8fae6 | 10,898 B | A | view · diff |
| git:20261019.9872680 | 2026-10-19 | 9872680 | 11,982 B | A | view · diff |
| git:20261019.bc413f9 | 2026-10-19 | bc413f9 | 10,729 B | A | view · diff |
| git:20261019.d718687 | 2026-10-19 | d718687 | 11,288 B | A | view · diff |
| git:20260614.900b4d1 | 2026-06-14 | 900b4d1 | 11,249 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 (10873 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
air-gapped/skills · 6 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6lxpnjojyh7zodm3 GET https://markdownregistry.com/api/v1/resolve?ref=air-gapped/skills/ubuntu-autoinstall GET https://markdownregistry.com/api/v1/blob/d7b63a2c99e0a6c01b8086b6958212d30f0ccdcc06579c3fe1c47a311510e6b3
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.