container-hardening

container-hardening is a skill for Claude Code, Codex from roodlicht/accans-sec-skills. It costs 54 tokens per session (3,116 once invoked), scanned B, original, no licence file.

Security guidance for building Docker and OCI container images, which package applications and their dependencies so they can run consistently.

In plain words
What is it for?
It helps choose safer base images, run as a non-root user, limit capabilities, scan and sign images, and apply runtime controls such as seccomp and AppArmor.
Why use it?
It reduces unnecessary permissions, unsafe defaults, vulnerable components, and risks while containers are built and running.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It helps choose safer base images, run as a non-root user, limit capabilities, scan and sign images, and apply runtime controls such as seccomp and AppArmor.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/roodlicht/accans-sec-skills/container-hardening
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 roodlicht/accans-sec-skills --skill container-hardening
Clone the repo
git clone --depth 1 https://github.com/roodlicht/accans-sec-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 container-hardening

README.md
[![agentmods](https://agentmods.dev/badge/skills/roodlicht/accans-sec-skills/container-hardening/github.svg)](https://agentmods.dev/skills/roodlicht/accans-sec-skills/container-hardening)
Your own site
<a href="https://agentmods.dev/skills/roodlicht/accans-sec-skills/container-hardening"><img src="https://agentmods.dev/badge/skills/roodlicht/accans-sec-skills/container-hardening/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-hardening

Your own site · 80×15
<a href="https://agentmods.dev/skills/roodlicht/accans-sec-skills/container-hardening"><img src="https://agentmods.dev/badge/skills/roodlicht/accans-sec-skills/container-hardening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,116 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00054 $0.03116
Opus 5 $0.00027 $0.01558
Sonnet 5 $0.00011 $0.00623
Haiku 4.5 $0.00005 $0.00312

Measured 11d ago against content hash cf2b62b5e7f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

container-hardening scanned grade B with 2 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 11d 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.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- A request like "review our Dockerfile", "migrate to distroless", "why does our container run as root", "trivy scan triage", "sign images with cosign".

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- **Apt/apk install cleanup.** `apt-get install --no-install-recommends` plus `rm -rf /var/lib/apt/lists/*` in the same RUN. Otherwise package lists stay in the layer.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/container-hardening/SKILL.md · 203 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 11d ago First seen · 203 lines · 54 tokens per session scan B cf2b62b5e7f8

Subscribe to this mod's changes

container-hardening is a skill published in the GitHub repository roodlicht/accans-sec-skills (4 stars, last pushed 3mo ago), with no licence file. It adds 54 tokens to every session and 3,116 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

Blue Team Defense & Hardening

System hardening, detection engineering, security baseline monitoring, patch management, defense-in-depth architecture, and security posture improvement.

Masriyan/Claude-Code-CyberSecurity-Skill · 30 tokens

container-security

Container and Kubernetes security assessment — image vulnerability scanning, SBOM diff analysis, K8s cluster auditing, RBAC privilege mapping, NetworkPolicy review, container escape testing, and runtime monitoring (Falco/Tetragon). Use when scanning Docker/OCI images, auditing K8s clusters, reviewing Dockerfiles…

EvilFreelancer/secs · 118 tokens

cloud-workload-protection

../../../cloud-infra/cloud-workload-protection/SKILL.md.

jaskaranhundal/usap-skills · 0 tokens

container-image-scan

../../../cloud-infra/container-image-scan/SKILL.md.

jaskaranhundal/usap-skills · 0 tokens

auditing-kubernetes-cluster-rbac

Auditing Kubernetes cluster RBAC configurations to identify overly permissive roles, wildcard permissions, dangerous ClusterRoleBindings, service account abuse, and privilege escalation paths using kubectl, rbac-tool, KubiScan, and Kubeaudit.

26zl/cybersec-toolkit · 56 tokens

dockerfile-scan

Scan a Dockerfile for insecure build patterns — running as root, unpinned or :latest base images, ADD from remote URLs, piping curl/wget into a shell, hardcoded secrets in ENV/ARG, world-writable chmod 777, and sudo usage. Use when the user asks to "review my Dockerfile", "is this container image secure", "lint my…

NovaCode37/claude-security-skills · 96 tokens