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Sec Hardening

Category: General  ·  Sub-category: general-misc  ·  Last updated:
Use to lock down a service, container, host, CI runner or local server — least privilege, sandboxing.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Hub: secure-coding. Hardening limits the blast radius of a bug the code review missed; it never replaces fixing the bug. Mechanics live in the platform skills — this module is the order of work and the checks.

What this skill does

Sec Hardening is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/sec-hardening/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Sec Hardening Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 206,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/sec-hardening
curl -L https://claudskills.com/skills/sec-hardening/SKILL.md \
  -o ~/.claude/skills/sec-hardening/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/sec-hardening/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/sec-hardening/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\sec-hardening\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Sec Hardening Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/sec-hardening/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Sec Hardening skill do?
Use to lock down a service, container, host, CI runner or local server — least privilege, sandboxing.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Sec Hardening skill?
Use Sec Hardening when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Sec Hardening" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Sec Hardening skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Sec Hardening is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
pmrjge. (2026). Sec Hardening [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/sec-hardening/
BibTeX
@misc{sec-hardening-2026,
  author    = {pmrjge},
  title     = {Sec Hardening [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/sec-hardening/}
}

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<script>
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<iframe>
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Security scan

Grade A · scanned 2026-10-11 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (network), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/sec-hardening/#security)

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Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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