cilium-network

cilium-network is a skill for Claude Code, Codex from Aidas-dev/k8s-agent-skills. It costs 84 tokens per session (2,235 once invoked), scanned A, original, MIT.

Instructions for configuring Cilium, a Kubernetes networking and security system that connects workloads and controls which traffic they may exchange.

In plain words
What is it for?
Use it to set up Cilium networking, network policies, external service IPs, BGP route announcements, encrypted traffic, and Hubble observability.
Why use it?
It helps you configure networking and security rules while investigating connectivity problems and observing traffic between Kubernetes workloads.

Skill for Claude CodeCodex

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

Good fit Use it to set up Cilium networking, network policies, external service IPs, BGP route announcements, encrypted traffic, and Hubble observability.

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Install with agentmods
npx agentmods add skills/aidas-dev/k8s-agent-skills/cilium-network
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 Aidas-dev/k8s-agent-skills --skill cilium-network
Clone the repo
git clone --depth 1 https://github.com/Aidas-dev/k8s-agent-skills

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 cilium-network

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/aidas-dev/k8s-agent-skills/cilium-network"><img src="https://agentmods.dev/badge/skills/aidas-dev/k8s-agent-skills/cilium-network.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,235 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 $0.00084 $0.02235
Opus 5 $0.00042 $0.01118
Sonnet 5 $0.00017 $0.00447
Haiku 4.5 $0.00008 $0.00224

Measured 8d ago against content hash eac78b0d7db3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

cilium-network 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.

skills/cilium-network/SKILL.md · 244 lines

How it starts

The opening of the file, as written. The whole thing — 244 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cilium Network

Cilium v1.19.4 — eBPF-based CNI, networking, and security for Kubernetes.

Overview

Cilium provides pod networking via eBPF, replacing kube-proxy with socket-level load balancing. Security policies enforce L3-L7 rules based on identity (not IP), surviving pod churn. Hubble delivers observability. LB IPAM + L2/BGP announcements expose Services externally without a cloud LB.

Cilium CRDs (Network Domain)

CRD API Purpose
CiliumNetworkPolicy cilium.io/v2 Namespaced L3-L7 network policy (identity, HTTP/gRPC/Kafka, DNS)
CiliumClusterwideNetworkPolicy cilium.io/v2 Cluster-scoped L3-L7 network policy
CiliumEndpoint cilium.io/v2 Per-pod status: identity, labels, policy enforcement state
CiliumEndpointSlice cilium.io/v2 Groups CiliumEndpoints for large-scale clusters
CiliumIdentity cilium.io/v2 Security identity (labels → numeric ID)
CiliumNode cilium.io/v2 Node-level Cilium config (allocated CIDRs, health endpoints)
CiliumCIDRGroup cilium.io/v2alpha1 Named group of CIDRs for policy fromCIDRSet/toCIDRSet
CiliumLoadBalancerIPPool cilium.io/v2 LB IPAM pool — allocate LoadBalancer IPs
CiliumL2AnnouncementPolicy cilium.io/v2alpha1 L2 ARP/NDP announcement of LoadBalancer IPs (beta)
CiliumLocalRedirectPolicy cilium.io/v2 Node-local traffic redirect (DNS cache, node-local proxy)
CiliumBGPClusterConfig cilium.io/v2alpha1 BGP cluster-level config (ASN, listen port, node selector)
CiliumBGPPeerConfig cilium.io/v2alpha1 BGP peer — transport, auth, timers, AFI/SAFI
CiliumBGPAdvertisement cilium.io/v2alpha1 Advertise pod CIDRs / service LB IPs via BGP
CiliumBGPNodeConfig cilium.io/v2alpha1 Per-node BGP status (read-only)
CiliumEnvoyConfig cilium.io/v2 Envoy proxy config (L7 policy enforcement)

Key Concepts

Routing Modes

  • Overlay (VXLAN/Geneve): Encapsulation, works on any infra. Default.
  • Native routing: Uses host routing table. Needs KubeSpan/IPsec/WireGuard for cross-node encryption. Faster.
  • kube-proxy replacement: kubeProxyReplacement=true — eBPF replaces iptables for services. Required for many features.

Read the full file on GitHub · 244 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 · 244 lines · 84 tokens per session scan A eac78b0d7db3

Subscribe to this mod's changes

cilium-network is a skill published in the GitHub repository Aidas-dev/k8s-agent-skills (2 stars, last pushed 25d ago), licensed MIT. It adds 84 tokens to every session and 2,235 once invoked, about $0.0004 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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