Agent skill

Container Security

by hardw00t in hardw00t/ai-security-arsenal

Container and Kubernetes security assessment — image vulnerability scanning, SBOM diff analysis, K8s cluster auditing, RBAC privilege mapping, NetworkPolicy review, container escape testing, and…

No licenceAuto-check passedSecurity

Install Container Security

skills CLI
$ npx skills add hardw00t/ai-security-arsenal --skill container-security -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install hardw00t/ai-security-arsenal container-security --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/hardw00t/ai-security-arsenal.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/container-security .claude/skills/container-security && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
container-security
GitHub stars
104
Token cost
~2.8k tokens
SKILL.md length
743 words
Files
16 (incl. references)
Skills in repo
7
Repo updated
First seen
Licence
None found

At a glance

Container and Kubernetes security assessment — image vulnerability scanning, SBOM diff analysis, K8s cluster auditing, RBAC privilege mapping, NetworkPolicy review, container escape testing, and…

  • Scanning Docker/OCI images
  • SKILL.md covers When to Use, Trigger Phrases, When NOT to Use This Skill and Decision Tree, plus 12 more sections
  • Calls brew, curl and bash; reaches raw.githubusercontent.com and github.com
  • Auditing K8s clusters

What it does

Container Security is an agent skill from hardw00t/ai-security-arsenal. 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, diffing SBOMs across releases, analyzing RBAC, or assessing container runtime posture. Triggers on requests involving Trivy, Grype, Syft, Kubescape, kube-bench, Falco, container escapes, or CIS…

Its SKILL.md is about 2.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 21 other files, including reference files (for example `examples/falco_custom_rule.yaml`, `examples/vulnerable_dockerfile.md` and `payloads/container_escape_poc.md`).

It sits in Security, covering Cloud security, Containers and Supply chain security. It works with Kubernetes, Docker and Trivy. The repository describes itself as: A collection of skills, agents, commands, and workflows for security researchers. Compatible with Claude Code, Claude Desktop, OpenCode, and other AI coding tools.

When your agent uses it

  • Scanning Docker/OCI images
  • Auditing K8s clusters
  • Reviewing Dockerfiles
  • Diffing SBOMs across releases

Example prompts

  • “/container-security”

Requirements

  • Python 3
  • Docker

What it can do on your machine

Read from SKILL.md and the folder at commit a1a68f7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • brew
    • curl
    • bash
    • pip
    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • raw.githubusercontent.com
    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Container Security loads about 2.8k tokens when it runs, and up to ~9.7k if it reads all its reference files. Until then it costs about 138 tokens; SKILL.md has 743 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~138
When it runs · the whole SKILL.md, loaded when a task matches
~2.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~9.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 743 words (~2,751 tokens).

“Thin router for container and Kubernetes security assessments. Load the reference, workflow, or payload file you need — do not read all of them.”

— opening of SKILL.md by hardw00t
name
container-security

Read the full SKILL.md on GitHub

Files

SKILL.md and 15 other files (references) in skills/container-security of hardw00t/ai-security-arsenal.

  • SKILL.md
  • examples/falco_custom_rule.yaml
  • examples/vulnerable_dockerfile.md
  • payloads/container_escape_poc.md
  • references/bounty_patterns_2024_2026.md
  • references/container_escape.md
  • references/image_scanning.md
  • references/kubernetes_hardening.md
  • references/runtime_security.md
  • schemas/finding.json
  • templates/assessment_report_template.md
  • workflows/cluster_audit.md
  • workflows/image_scan.md
  • workflows/network_policy_review.md
  • workflows/rbac_analysis.md
  • … and 1 more

Open the folder on GitHubat commit a1a68f7

Compare with similar skills

Container Security next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Container Security compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Container Security this skillhardw00t/ai-security-arsenal104—~2.8kAutomated safety check: PassNone
Performing Container Security Scanning With Trivymukul975/Anthropic-Cybersecurity-Skills34k—~818Automated safety check: PassApache-2.0
Container Security Hardeningsickn33/agentic-awesome-skills47k1 repos~1kAutomated safety check: NotesMIT
Sca TrivyAgentSecOps/SecOpsAgentKit2192 repos~3.7kAutomated safety check: PassCustom licence
Security Analyzeraiskillstore/marketplace430—~1.2kAutomated safety check: NotesNone
Manage Artifactsharness/harness-skills115—~1.4kAutomated safety check: PassApache-2.0

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Questions about Container Security

What does Container Security do?

Container and Kubernetes security assessment — image vulnerability scanning, SBOM diff analysis, K8s cluster auditing, RBAC privilege mapping, NetworkPolicy review, container escape testing, and…. Container Security is an agent skill from hardw00t/ai-security-arsenal. 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).

When should I use Container Security?

Container Security fits situations like: scanning Docker/OCI images; auditing K8s clusters; reviewing Dockerfiles; diffing SBOMs across releases.

How do I install Container Security in Claude Code?

Run `npx skills add hardw00t/ai-security-arsenal --skill container-security -a claude-code`. Or copy the skill folder (skills/container-security in hardw00t/ai-security-arsenal) into .claude/skills/container-security in your project. Claude Code loads it when a task matches its description.

How do I install Container Security in Codex?

Run `npx skills add hardw00t/ai-security-arsenal --skill container-security -a codex`. Or copy the skill folder (skills/container-security in hardw00t/ai-security-arsenal) into .agents/skills/container-security in your project. Codex loads it when a task matches its description.

Can I use Container Security in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hardw00t/ai-security-arsenal --skill container-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/container-security, .gemini/skills/container-security, .github/skills/container-security and .opencode/skills/container-security in your project.

What does Container Security need to run?

Going by SKILL.md and its folder, Container Security needs the command-line tools its instructions call (brew, curl, bash, pip and git). Our summary lists: Python 3; Docker.

Does Container Security access the network?

SKILL.md names 2 domains. In commands or code: raw.githubusercontent.com and github.com; the agent is likely to contact these when it follows the instructions. This is read from the text; nothing was executed.

Is Container Security safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Container Security use?

No licence was found for Container Security or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Container Security use?

About 2.8k tokens (SKILL.md is roughly 11k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 6.9k tokens, read only when the agent opens those files.

What are the alternatives to Container Security?

Skills that share tags, products or a category with Container Security: Performing Container Security Scanning With Trivy (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Container Security Hardening (sickn33/agentic-awesome-skills, 47k stars), Sca Trivy (AgentSecOps/SecOpsAgentKit, 219 stars) and Security Analyzer (aiskillstore/marketplace, 430 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Container Security?

hardw00t (a GitHub user) maintains it in hardw00t/ai-security-arsenal, which has 104 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on April 19, 2026.

Source: hardw00t/ai-security-arsenal on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.