k8s-policy

k8s-policy is a skill for Claude Code, Codex from yindia/rootcause. It costs 0 tokens per session (1,542 once invoked), scanned A, original, MIT.

A set of procedures for diagnosing Kyverno, a Kubernetes policy tool that checks or changes workload configurations. It covers admission failures and policy reports.

In plain words
What is it for?
It is for investigating denied deployments, missing labels or resource limits, blocked privileged containers, policy reports, and audit-versus-enforce behavior.
Why use it?
It helps explain whether a policy finding is only a warning or is actively blocking a request, and where the failing rule is.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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.

agentmods
npx agentmods add skills/yindia/rootcause/k8s-policy
Any agent
npx skills add yindia/rootcause --skill k8s-policy
Clone the repo
git clone --depth 1 https://github.com/yindia/rootcause

Made for: Claude Code, Codex.

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-policy

README.md
[![agentmods](https://agentmods.dev/badge/skills/yindia/rootcause/k8s-policy.svg)](https://agentmods.dev/skills/yindia/rootcause/k8s-policy)
Your own site
<a href="https://agentmods.dev/skills/yindia/rootcause/k8s-policy"><img src="https://agentmods.dev/badge/skills/yindia/rootcause/k8s-policy.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,542 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.01542
Opus 5 $0.00000 $0.00771
Sonnet 5 $0.00000 $0.00308
Haiku 4.5 $0.00000 $0.00154

Measured 6d ago against content hash dc91466be589, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

k8s-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 6d 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.

skills/claude/k8s-policy/SKILL.md · 309 lines

How it starts

The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill: k8s-policy

Comprehensive Kyverno policy diagnostics for admission failures, policy report analysis, and enforcement posture validation.

Trigger Phrases

Use this skill when the user mentions:

  • kyverno denied request
  • policy violation
  • admission webhook block
  • require labels policy
  • require resource limits policy
  • block privileged container
  • policy report failed
  • audit vs enforce behavior

RootCause Tools Allowed

Only use these tool names in this skill:

  • k8s.kyverno_detect
  • k8s.diagnose_kyverno
  • k8s.describe
  • k8s.list
  • k8s.events

Kyverno Workflow Overview

Canonical path:

  1. detect Kyverno,
  2. diagnose policy and controller health,
  3. identify failing policy/rule,
  4. separate audit findings from enforce blocks,
  5. provide remediation with policy intent preserved.

Policy Types Reference

Validate policies

Purpose:

  • enforce required fields/labels/security constraints.

Examples:

  • require owner label,
  • require memory/cpu requests and limits,
  • block privileged containers.

Mutate policies

Purpose:

  • add defaults or normalize fields.

Examples:

  • inject standard labels,
  • default imagePullPolicy,
  • enforce namespace annotations.

Generate policies

Purpose:

  • create dependent resources automatically.

Examples:

  • generate network policy baseline,
  • generate role bindings for namespaces.

Audit vs Enforce Modes

Interpretation:

  • Audit: violations reported, requests allowed.
  • Enforce: violations block admission.

When incident is active:

  • first confirm if block is from Enforce policy.
  • avoid disabling policy blindly; propose compliant manifest fix first.

Step-by-Step Investigation

Step 1: Detect Kyverno installation

Use k8s.kyverno_detect.

If not detected:

  • stop Kyverno-specific diagnosis,
  • report absence clearly.

Step 2: Run platform diagnosis

Use k8s.diagnose_kyverno:

namespace: kyverno
limit: 100

Collect:

  • controller readiness,
  • policy readiness,
  • report failures,
  • warning events.

Read the full file on GitHub · 309 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. 6d ago First seen · 309 lines · 0 tokens per session scan A dc91466be589

Subscribe to this mod's changes

k8s-policy is a skill published in the GitHub repository yindia/rootcause (42 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,542 tokens. 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.

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