create-operator

create-operator is a command for Claude Code from Sagart-cactus/claude-k8s-plugin. It costs 12 tokens per session (1,004 once invoked), scanned A, original, MIT.

A guided workflow for creating a Kubernetes operator, a program that manages custom resources inside Kubernetes, a system for running containerized applications. It gathers requirements before scaffolding an operator with webhooks and a Tilt development loop.

In plain words
What is it for?
Use it to plan and create a Kubebuilder operator, define its custom resource and status, configure webhooks and defaulting, set access scope, and specify managed child resources.
Why use it?
It turns a large operator setup into a defined sequence and makes key decisions about fields, validation, permissions, owned resources, and webhook behavior explicit before code is written.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the k8s plugin — 4 skills, 7 commands, 2 hooks shipped together

Good fit Use it to plan and create a Kubebuilder operator, define its custom resource and status, configure webhooks and defaulting, set access scope, and specify managed child resources.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/sagart-cactus/claude-k8s-plugin/create-operator
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/Sagart-cactus/claude-k8s-plugin

Made for: Claude Code.

Or install k8s, the plugin that ships this one along with the rest of its 4 skills, 7 commands, 2 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for create-operator

README.md
[![agentmods](https://agentmods.dev/badge/commands/sagart-cactus/claude-k8s-plugin/create-operator.svg)](https://agentmods.dev/commands/sagart-cactus/claude-k8s-plugin/create-operator)
Your own site
<a href="https://agentmods.dev/commands/sagart-cactus/claude-k8s-plugin/create-operator"><img src="https://agentmods.dev/badge/commands/sagart-cactus/claude-k8s-plugin/create-operator.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,004 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00012 $0.01004
Opus 5 $0.00006 $0.00502
Sonnet 5 $0.00002 $0.00201
Haiku 4.5 $0.00001 $0.00100

Measured 7d ago against content hash 10fbb5c3a3ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

create-operator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/create-operator.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Kubernetes Operator

You are guiding the user through creating a Kubernetes CRD operator with webhooks and a fast Tilt-based dev loop. Follow these steps in order.

Step 1: Requirements Gathering

Ask these 10 questions and wait for answers before writing any code:

  1. CRD purpose: What does this operator manage? (1 sentence)
  2. Spec fields: What fields go in the spec? (name, type, required?)
  3. Status fields: What should be reported in status?
  4. Webhook type: Validating, mutating, or both?
  5. Defaulting rules: Any fields that should be auto-defaulted?
  6. Validation rules: What invariants must be enforced?
  7. RBAC scope: Namespace-scoped or cluster-scoped?
  8. Resource ownership: What child resources does the controller create/manage?
  9. Failure policy: For webhooks — Fail or Ignore?
  10. Safety gates: Any annotations/labels required to enable mutations?

Step 2: Scaffold the Project

Once requirements are confirmed:

  1. Initialize a Kubebuilder project:

    kubebuilder init --domain <domain> --repo <module>
    kubebuilder create api --group <group> --version v1 --kind <Kind>
    kubebuilder create webhook --group <group> --version v1 --kind <Kind> --defaulting --programmatic-validation
    
  2. Implement the CRD types in api/v1/<kind>_types.go based on the spec/status fields.

  3. Run make generate && make manifests to regenerate deepcopy and CRD manifests.

Step 3: Implement Controller Logic

Write the reconcile loop in internal/controller/<kind>_controller.go:

  • Fetch the CR
  • Check if deleted (handle finalizers)
  • Create/update owned resources
  • Update status
  • Requeue as needed

Follow idempotency: the reconcile function should be safe to call multiple times.

Step 4: Implement Webhooks

In api/v1/<kind>_webhook.go:

  • Defaulting: Set default values for optional fields
  • Validation: Enforce invariants on create and update
  • Keep webhook logic simple and fast

Step 5: Set Up Dev Loop

Read the full file on GitHub · 100 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 100 lines · 12 tokens per session scan A 10fbb5c3a3ba

Subscribe to this mod's changes

create-operator is a command published in the GitHub repository Sagart-cactus/claude-k8s-plugin (34 stars, last pushed 6mo ago), licensed MIT. It adds 12 tokens to every session and 1,004 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.