crd-check
Use when writing or changing Kubernetes CustomResourceDefinitions, custom resources, operators or controllers, or before upgrading a cluster.
Skill by Srimukh99
Chalk Labs
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/srimukh99-crd-check
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: devops, writing
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md and code. Checked Nov 1, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
- Runs as
- Python package
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/crd-check
What's inside
- Skill name
crd-check- Description
- Use when writing or changing Kubernetes CustomResourceDefinitions, custom resources, operators or controllers, or before upgrading a cluster. Validates CRD structure, custom resources against their schema, and removed or deprecated Kubernetes APIs.
- License
- MIT
- Instructions
- 30 lines in SKILL.md · view on GitHub
Before installing
- Ships executable scripts
Files (2)
- SKILL.md
- crd_check.py · scripts/
SKILL.md (first lines)
# crd-check ## Do 1. Run `python3 <this skill folder>/scripts/crd_check.py <manifest dirs> --target <cluster version>` (for example `--target 1.30`). Needs PyYAML. 2. For Helm charts, render first with `helm template` and scan the output. 3. Fix every **FAIL**; review every **WARN**. ## What it checks | Check | Why it matters | | --- | --- | | `metadata.name` is `<plural>.<group>`, kind and scope set | The API server rejects the CRD otherwise | | Exactly one storage version, at least one served | Objects can't be stored or read otherwise | | Every version has an `openAPIV3Schema` | Required in `apiextensions.k8s.io/v1` | | Root-level preserve-unknown-fields | Means no validation at all | | Status field without a status subresource | Controllers and users overwrite each other | | Multiple versions, different schemas, no conversion | Stored objects break when clients switch versions | | Custom resources use a defined, served version | Applies fail or use a deprecated version | | Custom resource fields vs schema | Missing required fields, wrong types, bad enums, and unknown fields that Kubernetes silently drops (usually typos) | | Removed APIs (for example `batch/v1beta1` CronJob, `policy/v1beta1`) | Manifests fail on upgrade | ## Controller design rules - Reconcile toward the desired state; never assume the previous step succeeded. - Use `status.conditions` with `observedGeneration`. - Use finalizers for external cleanup, and remove them reliably. - Make reconciles idempotent and safe to run concurrently.
From Srimukh99/rubric, MIT.
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Signals
- Stars
- 0
- Forks
- 0
- Open issues
- 0
- Last commit (this folder)
- Oct 2, 2026 (1 month ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/Srimukh99/rubric
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Use when a plan has independent tasks, several unrelated failures to fix, or work big enough to split across subagents.
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Cite this page
crd-check skill. Agent Mart. https://agentmart.dev/skills/srimukh99-crd-check (last updated 2026-10-24)