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ClaudSkills / Security / red-team

Pentest Lyan

Category: Security  ·  Sub-category: red-team  ·  Last updated:
Perform dynamic security validation on explicitly authorized web targets, covering authentication, authorization, object ownership, tenant isolation, state transitions, and business rules, and reach strict conclusions using reproducible evidence, verified impact, and structured state. Use when the user provides an authorized web target and asks for penetration testing, a vulnerability assessment, or validation of web security boundaries. Do not use for unauthorized targets, social engineering, mobile-only testing, infrastructure scanning, or general security advice without a concrete authorized web target.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Perform dynamic security validation on authorized web targets. The targets, assets, accounts, interfaces, and task requirements provided by the user define the authorization scope for this engagement; do not repeatedly request proof of authorization unless the scope changes.

What this skill does

Pentest Lyan is a community-contributed Claude Code skill in the red-team sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/pentest-lyan/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user provides an authorized web target and asks for penetration testing, a vulnerability assessment, or validation of web security boundaries. Do not use for unauthorized targets, social engineering, mobile-only testing, infrastructure scanning, or general security advice without a concrete authorized web target.

Who uses this skill

The Pentest Lyan Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 176,000+ 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/pentest-lyan
curl -L https://claudskills.com/skills/pentest-lyan/SKILL.md \
  -o ~/.claude/skills/pentest-lyan/SKILL.md

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

Skills live at ~/.claude/skills/pentest-lyan/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\pentest-lyan\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 Pentest Lyan Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/pentest-lyan/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Pentest Lyan skill do?
Perform dynamic security validation on explicitly authorized web targets, covering authentication, authorization, object ownership, tenant isolation, state transitions, and business rules, and reach strict conclusions using reproducible evidence, verified impact, and structured state. Use when the user provides an authorized web target and asks for penetration testing, a vulnerability assessment, or validation of web security boundaries. Do not use for unauthorized targets, social engineering, mobile-only testing, infrastructure scanning, or general security advice without a concrete authorized web target.
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 Pentest Lyan skill?
Use Pentest Lyan when your Claude Code task falls under the Security category — specifically in the red team 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 Pentest Lyan" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Pentest Lyan 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. Pentest Lyan is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security 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
do-whilefor. (2026). Pentest Lyan [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/pentest-lyan/
BibTeX
@misc{pentest-lyan-2026,
  author    = {do-whilefor},
  title     = {Pentest Lyan [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/pentest-lyan/}
}

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Security scan

Grade A · scanned 2026-08-04 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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

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More Security skills

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

Browse all Security skills → Top 100 skills
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