Vulnerability Hunter

Vulnerability Hunter is an agent for Claude Code from xAmirHamza77/PenKit51. It costs 28 tokens per session (384 once invoked), scanned A, original, no licence file.

A specialist assistant for finding and validating software vulnerabilities. It produces proof-of-concept-backed findings, meaning reports supported by demonstrations that a suspected security issue works.

In plain words
What is it for?
Discovering vulnerabilities, testing whether they can be exploited, and preparing findings with proof-of-concept evidence.
Why use it?
It helps investigate security weaknesses deeply and distinguish validated issues from unconfirmed suspicions.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

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 agents/xamirhamza77/penkit51/vulnerability-hunter
Clone the repo
git clone --depth 1 https://github.com/xAmirHamza77/PenKit51

Made for: Claude Code.

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 Vulnerability Hunter

README.md
[![agentmods](https://agentmods.dev/badge/agents/xamirhamza77/penkit51/vulnerability-hunter.svg)](https://agentmods.dev/agents/xamirhamza77/penkit51/vulnerability-hunter)
Your own site
<a href="https://agentmods.dev/agents/xamirhamza77/penkit51/vulnerability-hunter"><img src="https://agentmods.dev/badge/agents/xamirhamza77/penkit51/vulnerability-hunter.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 384 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 5.1 $0.00028 $0.00384
Opus 5 $0.00014 $0.00192
Sonnet 5 $0.00006 $0.00077
Haiku 4.5 $0.00003 $0.00038

Measured 5d ago against content hash fcd534197cae, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Vulnerability Hunter scanned grade A with 0 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 5d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/vulnerability-hunter.md · 41 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 5d ago First seen · 41 lines · 28 tokens per session scan A fcd534197cae

Subscribe to this mod's changes

Vulnerability Hunter is an agent published in the GitHub repository xAmirHamza77/PenKit51 (2 stars, last pushed 2mo ago), with no licence file. It adds 28 tokens to every session and 384 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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