k8s-network-policy

k8s-network-policy is a skill for Claude Code from automateyournetwork/netclaw. It costs 60 tokens per session (1,466 once invoked), scanned A, original, Apache-2.0.

A read-only tool for reviewing Kubernetes NetworkPolicies, which are rules controlling what traffic may enter or leave pods. It also explains whether the review had enough permission and scope to be trusted.

In plain words
What is it for?
Use it to check which workloads can communicate, review namespace segmentation, investigate blocked traffic, and assess the limits of the available cluster permissions.
Why use it?
It helps identify blocked connections and security gaps, including namespaces with no policy, where Kubernetes allows all traffic by default.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: built for openclaw.

Good fit Use it to check which workloads can communicate, review namespace segmentation, investigate blocked traffic, and assess the limits of the available cluster permissions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/automateyournetwork/netclaw/k8s-network-policy
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.

Any agent
npx skills add automateyournetwork/netclaw --skill k8s-network-policy
Clone the repo
git clone --depth 1 https://github.com/automateyournetwork/netclaw

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 k8s-network-policy

README.md
[![agentmods](https://agentmods.dev/badge/skills/automateyournetwork/netclaw/k8s-network-policy/github.svg)](https://agentmods.dev/skills/automateyournetwork/netclaw/k8s-network-policy)
Your own site
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/k8s-network-policy"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/k8s-network-policy/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 k8s-network-policy

Your own site · 80×15
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/k8s-network-policy"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/k8s-network-policy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,466 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 4 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 9
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 53
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Anti-Refusal · line 37
    Skill instructs the agent to omit warnings, disclaimers, or ethical commentary. Stripping safety caveats hides risk from the user and is a common jailbreak preamble.
    Fix: Remove instructions that suppress warnings, disclaimers, or ethical commentary. Let the agent surface safety-relevant caveats to the user.
  • high Privilege Escalation · line 53
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
How audits are shown
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 $0.00060 $0.01466
Opus 5 $0.00030 $0.00733
Sonnet 5 $0.00012 $0.00293
Haiku 4.5 $0.00006 $0.00147

Measured 8d ago against content hash d01e20b40340, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

k8s-network-policy 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 8d 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.

workspace/skills/k8s-network-policy/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kubernetes NetworkPolicy Review

Server

k8s-mcp — vendored third-party (containers/kubernetes-mcp-server v0.0.66, Apache-2.0), a pinned static Go binary. 7 tools, strictly read-only, Secrets denied.

⚠ Two rules before anything else

1. No NetworkPolicy means ALL traffic is permitted

Kubernetes is default-allow. A namespace with zero policies permits everything, in both directions.

So "no policies found" is not a neutral observation — it is a finding, and reporting it without the consequence invites exactly the wrong conclusion. Someone reading "no policies" while thinking about security will hear "nothing to worry about". The opposite is true.

Always say the consequence: "No NetworkPolicy applies to this workload, so all ingress and egress traffic is permitted."

2. An empty result may mean you could not see, not that nothing exists

This is the one that gets people, and this server makes it worse.

Given a credential without cluster-wide list permission, the adopted server does not return an error. It silently rewrites your cluster-wide query to a single namespace and hands back that result with no caveat. Reproduced against a live cluster:

raw kubectl  →  Forbidden: cannot list networkpolicies at the cluster scope
this server  →  success, one policy          ← the cluster actually had two

For a security review that is an audit lie: "no policy restricts this pod" when the truth is "I could not see them".

The procedure — do this every time

Step 1 — confirm scope before you trust anything.

kubectl --kubeconfig $K8S_KUBECONFIG auth can-i list networkpolicies --all-namespaces
  • yes → cluster-wide answers are trustworthy. Proceed.
  • nostop treating empty results as absence. Any answer you give is namespace-scoped at best, and you must say so explicitly.

The supported deployment uses a dedicated cluster-wide-read ServiceAccount precisely so this returns yes and the narrowing branch never executes. If it returns no, the deployment is misconfigured — say that rather than working around it.

Read the full file on GitHub · 126 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. 8d ago First seen · 126 lines · 60 tokens per session scan A d01e20b40340

Subscribe to this mod's changes

k8s-network-policy is a skill published in the GitHub repository automateyournetwork/netclaw (657 stars, last pushed 5d ago), licensed Apache-2.0. It adds 60 tokens to every session and 1,466 once invoked, about $0.0003 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 2026-09-03.

Related

Other skills, from other repositories