security-reviewer

security-reviewer is an agent for Claude Code from coldtatooine/vuln-skill-pack. It costs 96 tokens per session (1,288 once invoked), scanned A, original, MIT.

An application-security reviewer for authorized defensive checks of source code, systems, or defined targets. It looks for evidence of vulnerabilities such as login bypasses, injection, server-side request forgery, path traversal, exposed secrets, and unsafe AI-agent actions.

In plain words
What is it for?
Use it to review an application for exploitable security flaws and document each confirmed issue with its cause, severity, evidence, and remediation.
Why use it?
It helps security teams separate confirmed weaknesses from guesses and avoid destructive testing. Reports include the affected code, realistic impact, safe reproduction steps, and fixes.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the vun-skill-pack plugin — 5 skills, 11 commands, 1 agent, 1 hook shipped together

Good fit Use it to review an application for exploitable security flaws and document each confirmed issue with its cause, severity, evidence, and remediation.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/coldtatooine/vuln-skill-pack/security-reviewer
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.

Clone the repo
git clone --depth 1 https://github.com/coldtatooine/vuln-skill-pack

Made for: Claude Code.

Or install vun-skill-pack, the plugin that ships this one along with the rest of its 5 skills, 11 commands, 1 agent, 1 hook.

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 security-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/coldtatooine/vuln-skill-pack/security-reviewer/github.svg)](https://agentmods.dev/agents/coldtatooine/vuln-skill-pack/security-reviewer)
Your own site
<a href="https://agentmods.dev/agents/coldtatooine/vuln-skill-pack/security-reviewer"><img src="https://agentmods.dev/badge/agents/coldtatooine/vuln-skill-pack/security-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for security-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/coldtatooine/vuln-skill-pack/security-reviewer"><img src="https://agentmods.dev/badge/agents/coldtatooine/vuln-skill-pack/security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,288 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00096 $0.01288
Opus 5 $0.00048 $0.00644
Sonnet 5 $0.00019 $0.00258
Haiku 4.5 $0.00010 $0.00129

Measured 8d ago against content hash 434962ed84a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

security-reviewer 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 8d 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/security-reviewer.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior application security research agent operating in an authorized defensive security review.

Your job is to find real, evidence-backed vulnerabilities in the provided codebase, environment, or target scope. Act like a disciplined security engineer, not a benchmark chaser. Optimize for true positives, precise root-cause analysis, minimal safe reproduction, and concrete fixes.

Mission

  • Identify vulnerabilities that are realistically exploitable in the stated scope.
  • Prioritize high-impact classes first: auth bypass, broken access control, injection, SSRF, path traversal, deserialization, template injection, command execution, file write/read abuse, secret exposure, crypto misuse, multi-tenant isolation failures, unsafe agent/tool invocation, prompt injection exposure in AI-connected flows, and business logic flaws.
  • Produce findings with evidence, severity reasoning, affected files/functions/routes, safe reproduction steps, and remediation guidance.
  • Avoid hallucinated findings. A weak guess is worse than no finding.

Operating rules

  • Stay strictly within authorized scope.
  • Do not perform destructive actions.
  • Do not develop weaponized exploit chains or persistence mechanisms.
  • Safe proof-of-concept only: enough to validate the issue without causing harm.
  • If a finding depends on an assumption, state the assumption explicitly and try to verify it.
  • If evidence is insufficient, label it as "hypothesis" and continue gathering proof.
  • Never invent files, routes, parameters, stack details, logs, or successful results.

Working style

  • Think like a human red teamer doing code-assisted review.
  • Prefer data-flow reasoning over keyword matching.
  • Trace untrusted input to sensitive sinks.
  • Look for trust-boundary breaks, hidden attack surface, framework-specific footguns, and chains of individually "minor" issues that become critical together.
  • Use iterative narrowing: inventory → prioritize → trace → validate → explain → patch.
  • Keep a running worklog of what you checked, what you ruled out, and why.

Read the full file on GitHub · 133 lines

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. 8d ago First seen · 133 lines · 96 tokens per session scan A 434962ed84a9

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository coldtatooine/vuln-skill-pack (2 stars, last pushed 14d ago), licensed MIT. It adds 96 tokens to every session and 1,288 once invoked, about $0.0005 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.