container-security

container-security is a skill for Claude Code from kyleoliveiro/sg-gov-skills. It costs 189 tokens per session (3,187 once invoked), scanned A, original, MIT.

A guide for securing the building, distribution, and deployment of software containers, such as Docker images and Kubernetes workloads, for Singapore government systems.

In plain words
What is it for?
Use it when writing or reviewing Dockerfiles, Kubernetes manifests, Helm charts, container build pipelines, registries, or runtime settings.
Why use it?
It helps check container configurations against 11 government security controls before deployment or audit.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the cybersecurity plugin — 10 skills shipped together

Good fit Use it when writing or reviewing Dockerfiles, Kubernetes manifests, Helm charts, container build pipelines, registries, or runtime settings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kyleoliveiro/sg-gov-skills/container-security
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 kyleoliveiro/sg-gov-skills --skill container-security
Clone the repo
git clone --depth 1 https://github.com/kyleoliveiro/sg-gov-skills

Made for: Claude Code.

Or install cybersecurity, the plugin that ships this one along with the rest of its 10 skills.

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 container-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/kyleoliveiro/sg-gov-skills/container-security/github.svg)](https://agentmods.dev/skills/kyleoliveiro/sg-gov-skills/container-security)
Your own site
<a href="https://agentmods.dev/skills/kyleoliveiro/sg-gov-skills/container-security"><img src="https://agentmods.dev/badge/skills/kyleoliveiro/sg-gov-skills/container-security/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 container-security

Your own site · 80×15
<a href="https://agentmods.dev/skills/kyleoliveiro/sg-gov-skills/container-security"><img src="https://agentmods.dev/badge/skills/kyleoliveiro/sg-gov-skills/container-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 189 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,187 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 $0.00189 $0.03187
Opus 5 $0.00095 $0.01594
Sonnet 5 $0.00038 $0.00637
Haiku 4.5 $0.00019 $0.00319

Measured 10d ago against content hash 293c0de57d87, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

container-security 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 10d 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/container-security/SKILL.md · 207 lines

How it starts

The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.

container-security: CS controls for SG government containers

You are building or auditing a containerised workload against the 11 Container Security controls (CS-1..CS-11) of the ICT&SS Policy Reform Cybersecurity Control Catalog. The family's scope is securing container building, distribution, and deployment. Almost all of these are configuration in a Dockerfile or an orchestrator manifest — cheap to get right on day one, and exactly what an audit or VAPT walks through for a container platform.

Source and currency

Control text in this skill and references/cs-controls.md is embedded from info.standards.tech.gov.sg as of 2026-07-22. The standards iterate actively. For any compliance-critical decision, verify against the live page:

Machine-readable OSCAL: https://github.com/GovtechSG/tech-standards — handy for tooling, but it lags the site; the site is authoritative.

Reference files

  • references/cs-controls.md — full text of all 11 controls (statement, recommendations, risk statement, the CS-7 parameter) plus cross-family notes. Read it when you need exact wording, e.g. for an audit response or SSP documentation.
  • references/platform-recipes.md — concrete Dockerfile, Kubernetes, and CI recipes per control, open-source-first (Trivy, Grype, Hadolint, Falco, Cosign) with cloud-native equivalents. Read it when actually configuring a build or cluster.

Before you start: find the SSP

Every agency system has a System Security Plan (SSP) that selects which controls apply at which level and sets parameter values. One CS control carries an agency-defined parameter — the catalog deliberately leaves it blank:

Control Parameter What the SSP defines
CS-7 cs-7_prm_1 The location where container image scanning occurs (e.g. "CI pipeline on push, plus continuous registry scanning")

Ask for the project's SSP (or the agency ISO/CISO contact) and use its value. Do not invent the scan location — write what the SSP says. If no SSP exists yet, flag that first; the sibling skill ssp-navigator determines which SSP applies and at which level each CS control sits for this system.

Read the full file on GitHub · 207 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 207 lines · 189 tokens per session scan A 293c0de57d87

Subscribe to this mod's changes

container-security is a skill published in the GitHub repository kyleoliveiro/sg-gov-skills (16 stars, last pushed 1mo ago), licensed MIT. It adds 189 tokens to every session and 3,187 once invoked, about $0.0009 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 2026-08-30.

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