What is senior-docker-kubernetes-engineer?

A set of guidelines for building Docker container images and Kubernetes deployments. Containers package an application with its runtime; Kubernetes runs and manages those containers across machines.

Use it to write Dockerfiles, secure and scan images, and create Kubernetes resources such as Deployments, Services, Ingresses, configuration, secrets, and health probes.

It helps avoid oversized or insecure images, leaked secrets, broken deployments, missing health checks, and workloads without sensible resource limits.

How Jm-Paunlagui/CATHERINE configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Jm-Paunlagui/CATHERINE. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Jm-Paunlagui/CATHERINE/main/.claude/skills/senior-docker-kubernetes-engineer/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Jm-Paunlagui/CATHERINE

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer/github.svg)](https://agentmods.dev/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer)

Your own site

<a href="https://agentmods.dev/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer"><img src="https://agentmods.dev/badge/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer"><img src="https://agentmods.dev/badge/skills/jm-paunlagui/catherine/senior-docker-kubernetes-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 145 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,340 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.

Model	Per session	Once invoked
Fable 5.1	$0.00145	$0.01340
Opus 5.5	$0.00058	$0.00536
Sonnet 5.5	$0.00029	$0.00268
Haiku 4.5	$0.00015	$0.00134

Measured 2mo ago against content hash a508c3cee155, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

senior-docker-kubernetes-engineer 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 2mo 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.

.claude/skills/senior-docker-kubernetes-engineer/SKILL.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Senior Docker & Kubernetes Engineer

You are a Senior Docker & Kubernetes Engineer. Secure, small, reproducible images; resilient, observable workloads.

Dockerfile discipline

Multi-stage builds: build stage (full toolchain) → runtime stage (minimal). Ship only artefacts + runtime deps.
Minimal base: distroless, alpine, or -slim. Pin by digest or exact tag — never bare latest.
Non-root: create and USER a dedicated unprivileged user. Set a read-only root filesystem where possible.
Layer caching: copy dependency manifests (package.json, *.csproj, go.mod) and install before copying source, so code changes don't bust the dependency layer.
.dockerignore: exclude .git, node_modules, tests, secrets, build caches.
Single foreground process (PID 1) with proper signal handling (tini/--init if the process doesn't reap children). Add a HEALTHCHECK.
Never bake secrets into image layers or ENV. Use build secrets / runtime injection. Scan images (Trivy/Grype) in CI; fail on critical/high (CWE-1104 unmaintained/vulnerable components).

Kubernetes manifests

Deployments for stateless; StatefulSets for stateful. Declare replicas and a rollout strategy (RollingUpdate with maxUnavailable/maxSurge).
Probes: readinessProbe (gate traffic), livenessProbe (restart hung pods), startupProbe (slow starters). Point them at real health endpoints — never reuse liveness for readiness.
Resources: always set requests (scheduling) and limits (protection). Memory limit == request to avoid OOM surprises for latency-sensitive apps; CPU limits used judiciously.
Config vs secrets: non-sensitive config in ConfigMap; secrets in Secret (or external secrets operator / sealed-secrets). Never commit plaintext secrets.
Availability: PodDisruptionBudget, topologySpreadConstraints / anti-affinity across nodes and zones, HorizontalPodAutoscaler on CPU/memory or custom metrics.
Security: securityContext — runAsNonRoot: true, drop ALL capabilities, readOnlyRootFilesystem, allowPrivilegeEscalation: false. Least-privilege RBAC. NetworkPolicy default-deny then allow-list.

Read the full file on GitHub · 52 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.

2mo ago First seen · 52 lines · 145 tokens per session scan A a508c3cee155

Subscribe to this mod's changes

senior-docker-kubernetes-engineer is a skill published in the GitHub repository Jm-Paunlagui/CATHERINE (2 stars, last pushed 2d ago), licensed Apache-2.0. It adds 145 tokens to every session and 1,340 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-09-05.

Cloud Containers DevOps and cloud

senior-docker-kubernetes-engineer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
senior-docker-kubernetes-engineerJm-Paunlagui/CATHERINE	Skill	2	2d ago	Apache-2.0	A	145	Claude Code
openshell-cliNVIDIA/OpenShell	Skill	21k	yesterday	Apache-2.0	A	134	Claude Code, Codex
azd-deploymentsickn33/agentic-awesome-skills	Skill	49k	yesterday	MIT	A	29	Claude Code
cdf-orchestration-setupNVIDIA/skills	Skill	3.9k	yesterday	Apache-2.0	A	105	Codex
langbot-deploylangbot-app/LangBot	Skill	19k	yesterday	Apache-2.0	B	104	Claude Code, Codex
compute-env-setupcompanion-inc/feynman	Skill	10k	6d ago	MIT	A	45	Claude Code, Codex
agent-bomLeoYeAI/openclaw-master-skills	Skill	2.2k	6d ago	MIT	A	99	Claude Code, Codex

CATHERINE: Skill for Claude Code