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.
npx skills add jakesterns/agent-skills --skill docker-hardeninggit clone --depth 1 https://github.com/jakesterns/agent-skillsWrote 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.
[](https://agentmods.dev/skills/jakesterns/agent-skills/docker-hardening)<a href="https://agentmods.dev/skills/jakesterns/agent-skills/docker-hardening"><img src="https://agentmods.dev/badge/skills/jakesterns/agent-skills/docker-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.
<a href="https://agentmods.dev/skills/jakesterns/agent-skills/docker-hardening"><img src="https://agentmods.dev/badge/skills/jakesterns/agent-skills/docker-hardening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00026 | $0.00309 |
| Opus 5 | $0.00013 | $0.00154 |
| Sonnet 5 | $0.00005 | $0.00062 |
| Haiku 4.5 | $0.00003 | $0.00031 |
Grade A, and why
docker-hardening scanned grade A with 1 finding 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 9d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
5. Check supply-chain risk: curl-pipe-shell, unsigned downloads, mutable tags, and unverified artifacts. What it actually says
Docker Hardening
Use this skill when reviewing or improving Dockerfiles, Compose files, container runtime flags, or image build workflows.
Inputs
- Dockerfile, compose file, build logs, image metadata, deployment environment, and application runtime requirements
Steps
- Review base image choice, version pinning, architecture, and maintenance status.
- Check build reproducibility: pinned dependencies, deterministic package install, cache hygiene, and lockfile use.
- Reduce image size where it also improves reliability or security: multi-stage builds, minimal runtime dependencies, and cleaned package caches.
- Review runtime security: non-root user, file permissions, capabilities, read-only filesystem, secrets handling, exposed ports, and health checks.
- Check supply-chain risk: curl-pipe-shell, unsigned downloads, mutable tags, and unverified artifacts.
- Validate operational readiness: signals, graceful shutdown, logging, startup command, environment variables, and resource expectations.
Output
Return:
- Container risk summary
- Recommended Dockerfile/config changes
- Security hardening checklist
- Reproducibility and size notes
- Validation commands such as build, run, scan, or smoke test
Guidelines
- Do not optimize image size at the expense of clarity or correctness.
- Prefer pinned, maintained base images.
- Keep production runtime separate from build tooling when practical.
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.
- 9d ago First seen · 38 lines · 26 tokens per session scan A 5df68cfbe4f0
docker-hardening is a skill published in the GitHub repository jakesterns/agent-skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 26 tokens to every session and 309 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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docker-socket-mount
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