air-gapped/skills · .claude/skills/secure-boot-cert-rotation/SKILL.md

secure-boot-cert-rotation skillA

secure-boot-cert-rotation is agent-read markdown (skill) from air-gapped/skills: Triage and fix the Microsoft Secure Boot 2011→2023 UEFI certificate rotation across Dell PowerEdge / iDRAC9 bare metal, Ubuntu/Linux servers, and Harvester HCI / KubeVirt guest VMs. Two 2011 CAs expired June 2026 and Windows Production PCA 2011 expires 2026-10-19 — but UEFI firmware ignores certificate expiry, so nothing stopped booting; the real risks are forward-compat once a 2023-only-signed shim arrives (already true on aarch64) plus a dbx/revocation freeze. Routes to the per-platform fix: i.

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 air-gapped/skills/secure-boot-cert-rotation@git:20260915.3e9018e
Exact content
mdr add air-gapped/skills/secure-boot-cert-rotation@sha256:32864a350aec688f

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_nfe25nyzmqsexeln.svg)](https://markdownregistry.com/a/art_nfe25nyzmqsexeln)

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Versions

versioncommittedcommitsizeaudit
git:20260915.3e9018e latest2026-09-15 3e9018e 12,895 BA view · diff
git:20260817.66f15e82026-08-17 66f15e8 12,603 BA view · diff
git:20260817.81a3bbe2026-08-17 81a3bbe 12,488 BA view · diff
git:20260817.dc7eef12026-08-17 dc7eef1 12,478 BA view · diff
git:20260817.dd0a4b52026-08-17 dd0a4b5 12,454 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 (12895 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

air-gapped/skills · 5 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_nfe25nyzmqsexeln
GET https://markdownregistry.com/api/v1/resolve?ref=air-gapped/skills/secure-boot-cert-rotation
GET https://markdownregistry.com/api/v1/blob/32864a350aec688f22023b9e117995a73b57ecaee8817db0c20c8c009fcdae3d