k8s-sidecar-testing

k8s-sidecar-testing is a skill for Claude Code, Codex from fakoli/fakoli-plugins. It costs 43 tokens per session (516 once invoked), scanned A, original, MIT.

A testing workflow for nat464-sidecar, a networking sidecar, in IPv6-only Kubernetes clusters. Kubernetes is a system for deploying and managing containers; this workflow uses Multipass virtual machines and k3s, a lightweight Kubernetes distribution.

In plain words
What is it for?
Use it to provision test virtual machines, create an IPv6-only k3s cluster, build and deploy the container image, verify inbound and outbound translation, benchmark performance, validate paths, and troubleshoot networking.
Why use it?
It provides a defined process for creating the test cluster, deploying the sidecar, and checking IPv6-to-IPv4 translation and pod networking.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the k8s-sidecar-testing plugin — 1 skill shipped together

Good fit Use it to provision test virtual machines, create an IPv6-only k3s cluster, build and deploy the container image, verify inbound and outbound translation, benchmark performance, validate paths, and troubleshoot networking.

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Install with agentmods
npx agentmods add skills/fakoli/fakoli-plugins/k8s-sidecar-testing
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 fakoli/fakoli-plugins --skill k8s-sidecar-testing
Clone the repo
git clone --depth 1 https://github.com/fakoli/fakoli-plugins

Made for: Claude Code, Codex.

Or install k8s-sidecar-testing, the plugin that ships this one along with the rest of its 1 skill.

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-sidecar-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/fakoli/fakoli-plugins/k8s-sidecar-testing.svg)](https://agentmods.dev/skills/fakoli/fakoli-plugins/k8s-sidecar-testing)
Your own site
<a href="https://agentmods.dev/skills/fakoli/fakoli-plugins/k8s-sidecar-testing"><img src="https://agentmods.dev/badge/skills/fakoli/fakoli-plugins/k8s-sidecar-testing.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 516 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 $0.00043 $0.00516
Opus 5 $0.00022 $0.00258
Sonnet 5 $0.00009 $0.00103
Haiku 4.5 $0.00004 $0.00052

Measured yesterday against content hash 9e29ec1855da, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

k8s-sidecar-testing 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 yesterday.

The scan reads SKILL.md. This mod also ships 8 executable files (scripts/benchmark.sh, scripts/build-image.sh, scripts/deploy-test.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

archive/k8s-sidecar-testing/skills/k8s-sidecar-testing/SKILL.md · 21 lines

What it actually says

K8s Sidecar Testing

Use the helpers for the nat464 demo topology. Inspect the actual project manifests and container names first; adapt the checks if its contract differs. The supplied cluster setup is IPv4-primary dual-stack, not IPv6-only or an AWS EKS emulator.

Resolve SKILL_DIR to the directory containing this installed SKILL.md. Helpers live at $SKILL_DIR/scripts/; manifests and Dockerfile belong to the user's project, selected with --project-dir. These are separate paths. When working inside a VM, transfer the whole skill directory as well as the project.

  1. Read the plugin README for prerequisites, topology, arguments, and mutation boundaries. Reuse an authorized existing test environment when available; VM provisioning is optional.
  2. Select an explicit kubeconfig context and a dedicated namespace using --context/--namespace or KUBE_CONTEXT/KUBE_NAMESPACE. Helpers preserve the caller's KUBECONFIG. Never infer a target from whichever context is current.
  3. For existing pods, run validate-paths.sh; it does not deploy resources. For a requested deployment, run deploy-test.sh --project-dir ... with both project manifests. It validates supported resources and ownership before applying, then returns the checks' actual exit status. Existing unowned resources are not adopted.
  4. Run benchmark.sh --iterations 50 only when performance measurement is requested. Report failed samples as well as p50/p95/p99. External HTTP checks require --external-url; a skipped check is not a pass.
  5. On requested cleanup, teardown.sh removes only known, owned Pods/ConfigMaps in the selected namespace. VM deletion is a separate explicitly targeted operation documented in the README.

All helpers accept --help. Provisioning, image import, deploy, cleanup, and benchmarks are independent operations; a request to inspect or validate does not imply permission to run all phases. Treat nonzero exits, missing prerequisites, absent IPv6, timeout, and infrastructure errors as incomplete/failed evidence. Do not rerun or broaden scope silently.

See troubleshooting for diagnosing failed checks and the authoritative upstream sources behind networking assumptions.

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. yesterday Changed · -110 lines · -74 tokens per session 9e29ec1855da
  2. 7d ago First seen · 131 lines · 117 tokens per session scan A 1ea07ecf667e

Subscribe to this mod's changes

k8s-sidecar-testing is a skill published in the GitHub repository fakoli/fakoli-plugins (4 stars, last pushed 2d ago), licensed MIT. It adds 43 tokens to every session and 516 once invoked, about $0.0002 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 2026-08-31.

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