pentest

pentest is a skill for Claude Code, Codex from marinahaugen/polymorph-mindset-plugins. It costs 103 tokens per session (890 once invoked), scanned A, original, MIT.

A procedure for authorized penetration testing, which is a controlled attempt to find weaknesses in a web application. It uses security-testing tools running in Kali Linux, a security-focused operating system.

In plain words
What is it for?
It helps test local, staging, or production web applications for vulnerabilities, provided the user owns the target or has written permission to test it.
Why use it?
It provides a defined scan process and checks the required setup before testing. It also prevents confusion about reaching local development sites from inside Docker.

Skill for Claude CodeCodex

Part of the polymorph-mindset plugin — 6 skills shipped together

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/marinahaugen/polymorph-mindset-plugins/pentest
Any agent
npx skills add marinahaugen/polymorph-mindset-plugins --skill pentest
Clone the repo
git clone --depth 1 https://github.com/marinahaugen/polymorph-mindset-plugins

Made for: Claude Code, Codex.

Or install polymorph-mindset, the plugin that ships this one along with the rest of its 6 skills.

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 pentest

README.md
[![agentmods](https://agentmods.dev/badge/skills/marinahaugen/polymorph-mindset-plugins/pentest.svg)](https://agentmods.dev/skills/marinahaugen/polymorph-mindset-plugins/pentest)
Your own site
<a href="https://agentmods.dev/skills/marinahaugen/polymorph-mindset-plugins/pentest"><img src="https://agentmods.dev/badge/skills/marinahaugen/polymorph-mindset-plugins/pentest.svg" alt="Measured on agentmods" height="20"></a>
Per session 103 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 890 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original 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 $0.00103 $0.00890
Opus 5 $0.00051 $0.00445
Sonnet 5 $0.00021 $0.00178
Haiku 4.5 $0.00010 $0.00089

Measured 4d ago against content hash 7cd7056a3c62, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

pentest 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 4d 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. **Security headers audit** (curl) — check for missing protective headers
plugins/polymorph-mindset/skills/pentest/SKILL.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Pentest Skill

Run structured penetration tests against web applications using the kali-pentest MCP server.

⚠️ Authorized use only. Run this only against systems you own or have explicit written permission to test. Unauthorized scanning is illegal in most jurisdictions.

Prerequisites Check

Before scanning, verify:

  1. Docker running: docker ps succeeds
  2. Kali image exists: docker images kali-mcp-official shows the image
  3. MCP connected: mcp__kali-pentest__server_health tool is available and returns healthy

If any prerequisite fails, guide the user:

  • No Docker: open -a Docker (macOS)
  • No image: build from .pentest/Dockerfile in project root
  • No MCP: ensure .mcp.json exists in project root with kali-pentest config, restart session

Target Selection

Ask the user which target to scan:

  • Local dev (localhost:3000): Use host.docker.internal as the target hostname (macOS Docker cannot reach host localhost directly)
  • Staging/Production (e.g. staging.example.com): Use the hostname directly

Scan Sequence

Use mcp__kali-pentest__execute_command for ALL scans (the dedicated API wrapper tools like nmap_scan return 500 errors — always use execute_command with CLI commands directly).

Run scans in this order. See references/scans.md for exact commands.

Phase 1: Reconnaissance

  1. Port scan (nmap) — discover open ports and services
  2. Version detection (nmap) — identify software versions on interesting ports

Phase 2: Vulnerability Scanning

  1. Web server scan (nikto) — common web vulnerabilities, misconfigs
  2. Directory discovery (dirb) — hidden endpoints, admin panels, API routes
  3. Security headers audit (curl) — check for missing protective headers
  4. Sensitive files check (curl) — .env, .git/config, robots.txt, etc.

Phase 3: Auth & Access Testing

  1. Auth bypass tests — CVE-2025-29927 middleware bypass header, unauthenticated API access
  2. Cookie security check — HttpOnly, Secure, SameSite flags
  3. TLS configuration — verify TLS 1.0/1.1 rejected, check cipher strength

Read the full file on GitHub · 77 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 77 lines · 103 tokens per session scan A 7cd7056a3c62

Subscribe to this mod's changes

pentest is a skill published in the GitHub repository marinahaugen/polymorph-mindset-plugins (4 stars, last pushed 2mo ago), licensed MIT. It adds 103 tokens to every session and 890 once invoked, about $0.0005 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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