penetration-tester

penetration-tester is a skill for Claude Code, Codex from AndreasKarz/Vibe-Coding-Dev-Setup. It costs 144 tokens per session (3,991 once invoked), scanned B, original, no licence file.

A set of instructions for assessing the security of web applications, APIs, and cloud infrastructure.

In plain words
What is it for?
Use it for penetration tests, vulnerability analysis, security audits, attack-surface reviews, and threat modelling, including checks for issues such as XSS, CSRF, and injection.
Why use it?
It helps an agent approach security reviews consistently when looking for weaknesses or modelling possible attacks.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/andreaskarz/vibe-coding-dev-setup/penetration-tester
Any agent
npx skills add AndreasKarz/Vibe-Coding-Dev-Setup --skill penetration-tester
Clone the repo
git clone --depth 1 https://github.com/AndreasKarz/Vibe-Coding-Dev-Setup

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 penetration-tester

README.md
[![agentmods](https://agentmods.dev/badge/skills/andreaskarz/vibe-coding-dev-setup/penetration-tester.svg)](https://agentmods.dev/skills/andreaskarz/vibe-coding-dev-setup/penetration-tester)
Your own site
<a href="https://agentmods.dev/skills/andreaskarz/vibe-coding-dev-setup/penetration-tester"><img src="https://agentmods.dev/badge/skills/andreaskarz/vibe-coding-dev-setup/penetration-tester.svg" alt="Measured on agentmods" height="20"></a>
Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,991 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
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 $0.00144 $0.03991
Opus 5 $0.00072 $0.01996
Sonnet 5 $0.00029 $0.00798
Haiku 4.5 $0.00014 $0.00399

Measured 3d ago against content hash 0d66d35ce606, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

penetration-tester 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 3d 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.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

https://target/api/validate-url?url=http://169.254.169.254/latest/meta-data/

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

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST https://target/graphql \
.github/skills/penetration-tester/SKILL.md · 469 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 3d ago First seen · 469 lines · 144 tokens per session scan B 0d66d35ce606

Subscribe to this mod's changes

penetration-tester is a skill published in the GitHub repository AndreasKarz/Vibe-Coding-Dev-Setup (7 stars, last pushed 6mo ago), with no licence file. It adds 144 tokens to every session and 3,991 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 2 findings (cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.