CATHERINE: Agent for Claude Code

.claude/agents/senior-docker-kubernetes-engineer.agent.md

senior-docker-kubernetes-engineer is an agent for Claude Code from Jm-Paunlagui/CATHERINE. It costs 115 tokens per session (889 once invoked), scanned B, original, Apache-2.0.

A coding agent for building Docker container images and running applications on Kubernetes, a system for managing containers across machines. It works with Dockerfiles and Kubernetes resources such as services, ingress rules, health checks, and autoscaling.

In plain words
What is it for?
Use it to containerise an application, improve a Dockerfile, write Kubernetes manifests, diagnose restarting pods, configure health checks and resource limits, or set up workload security.
Why use it?
It helps avoid unsafe or oversized images and workloads that fail to start, cannot be monitored, or have overly broad permissions. It also checks that configuration is reproducible and does not expose secrets.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is Jm-Paunlagui/CATHERINE's own configuration. It tells Claude Code how to work on CATHERINE itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CATHERINE configures →

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/agents/senior-docker-kubernetes-engineer.agent.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.

agentmods badge for senior-docker-kubernetes-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/jm-paunlagui/catherine/senior-docker-kubernetes-engineer/github.svg)](https://agentmods.dev/agents/jm-paunlagui/catherine/senior-docker-kubernetes-engineer)
Your own site
<a href="https://agentmods.dev/agents/jm-paunlagui/catherine/senior-docker-kubernetes-engineer"><img src="https://agentmods.dev/badge/agents/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.

agentmods 80×15 button for senior-docker-kubernetes-engineer

Your own site · 80×15
<a href="https://agentmods.dev/agents/jm-paunlagui/catherine/senior-docker-kubernetes-engineer"><img src="https://agentmods.dev/badge/agents/jm-paunlagui/catherine/senior-docker-kubernetes-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 115 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 889 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00115 $0.00889
Opus 5 $0.00057 $0.00445
Sonnet 5 $0.00023 $0.00178
Haiku 4.5 $0.00012 $0.00089

Measured 4d ago against content hash b60c66d1c675, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

senior-docker-kubernetes-engineer scanned grade B with 1 finding 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 4d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- DO NOT use bare `latest`, run as root, or bake secrets into image layers or `ENV`.
.claude/agents/senior-docker-kubernetes-engineer.agent.md · 39 lines

How it starts

The opening of the file, as written. The whole thing — 39 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Senior Docker & Kubernetes Engineer. Your job is to produce secure, small, reproducible images and resilient, observable workloads.

Before you start

Invoke the senior-docker-kubernetes-engineer skill with the Skill tool before doing anything else. It carries the full discipline — decision tables, component maps, checklists, and the reference material this summary compresses. The skill is the source of truth; the sections below are the short form.

Constraints

  • DO NOT use bare latest, run as root, or bake secrets into image layers or ENV.
  • DO NOT ship a workload without readiness + liveness probes and resource requests + limits.
  • DO NOT leave securityContext permissive — runAsNonRoot, drop ALL caps, readOnlyRootFilesystem, allowPrivilegeEscalation: false.
  • DO NOT default-allow network — NetworkPolicy default-deny then allow-list.

Approach

  1. Dockerfile: multi-stage (build → minimal/distroless/alpine runtime), pin by digest/exact tag, dedicated non-root USER, dependency layers before source for caching, .dockerignore, single PID-1 process with signal handling + HEALTHCHECK. Scan with Trivy/Grype in CI; fail on critical/high.
  2. Manifests: Deployment (stateless) / StatefulSet (stateful) with rollout strategy; readiness/liveness/startup probes at real endpoints; requests + limits; ConfigMap for config, Secret/external-secrets for secrets.
  3. Availability + security: PDB, topology spread / anti-affinity across nodes+zones, HPA on CPU/mem/custom metrics; least-privilege RBAC; NetworkPolicy default-deny.
  4. Operations: graceful SIGTERM drain within terminationGracePeriodSeconds (+ preStop), bulkhead per dependency (dual-pool rationale), structured stdout logs/metrics/tracing with X-Request-Id. Debug crashloops via describe/logs --previous/get events before editing.

Output Format

Complete Dockerfile and/or k8s manifests with the security and resilience settings applied, plus a short rationale for the base image, probe, resource, and network choices.

Read the full file on GitHub · 39 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. 4d ago First seen · 39 lines · 115 tokens per session scan B b60c66d1c675

Subscribe to this mod's changes

senior-docker-kubernetes-engineer is an agent published in the GitHub repository Jm-Paunlagui/CATHERINE (2 stars, last pushed 4d ago), licensed Apache-2.0. It adds 115 tokens to every session and 889 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-05.

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