k8s-upgrade-readiness SKILL.md skillA
k8s-upgrade-readiness from k8s-servant/k8s-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add k8s-servant/k8s-skills/k8s-upgrade-readiness@git:20261031.8d9def9Pins git:20261031.8d9def9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- k8s-servant/k8s-skills
- Path
skills/k8s-upgrade-readiness/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261031.8d9def9, committed Oct 31, 2026
- Size
- 13,099 bytes
- Repository stars
- 35
- License
- Apache-2.0
Use when a Kubernetes cluster is about to be upgraded to its next minor version, or someone asks "is the cluster ready to upgrade?", "what will break when we upgrade?" or why a node drain hangs during an upgrade: PodDisruptionBudgets with ALLOWED DISRUPTIONS 0, pods with no controller ("cannot delete Pods that declare no controller"), admission webhooks with failurePolicy Fail and no endpoints, deprecated or removed APIs still in use (apiserver_requested_deprecated_apis, CRD versions marked…
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
# Upgrade readiness Check a cluster before a Kubernetes minor version upgrade, and report what has to be fixed first. **Read only.** Run the investigation commands freely. Never upgrade, drain, cordon or evict anything, and never change a workload, a PodDisruptionBudget or a webhook yourself: everything here is a proposed fix for the user and the owners of each object. Never read Secrets. An upgrade replaces the control plane first, one minor version at a time, and then every node: each node is cordoned and drained (its pods are evicted and recreated elsewhere), then replaced or upgraded. Managed clusters (AKS, EKS, GKE) do both for you, but they drain nodes the same way. So most of what breaks an upgrade is in the cluster: pods that cannot be evicted, pods that cannot be recreated, and clients or add-ons that use an API or a node setup the new version no longer supports. The commands use placeholders: `my-namespace`, `my-app`, `my-node`. Replace them with the real names. Some checks need more than the built-in `view` role (nodes, CRDs, webhook configurations, the API server's metrics); if a command is forbidden, say which check it was and give the user the command to run. …
Read the whole file at its exact version.
How to install
mdr add k8s-servant/k8s-skills/k8s-upgrade-readiness@sha256:b044e1fb389d2bd6The line at the top of this page pins the label git:20261031.8d9def9, 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_dxbaxoxy62o2zvo2)
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Versions
The registry has recorded 1 version of this file, committed on Oct 31, 2026.
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 (13099 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
k8s-servant/k8s-skills · 35 stars · license Apache-2.0 · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dxbaxoxy62o2zvo2 GET https://markdownregistry.com/api/v1/resolve?ref=k8s-servant/k8s-skills/k8s-upgrade-readiness GET https://markdownregistry.com/api/v1/blob/b044e1fb389d2bd6f2cb54e31652cd9a67d22c190925f1f72953c92713af7c9c
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.