security-review

security-review is a skill for Claude Code, Codex from subhansh-dev/agent-maxxing. It costs 25 tokens per session (803 once invoked), scanned A, original, MIT.

A method for reviewing code changes for security problems such as unsafe input, broken access controls, weak secret handling, and data exposure. It focuses on likely, meaningful vulnerabilities instead of speculative concerns.

In plain words
What is it for?
Use it to audit a new code change before release, especially its input handling, authentication, authorisation, cryptography, database queries, and file operations.
Why use it?
It helps find changes that could let someone access data, bypass permissions, or run unwanted commands. Confidence filtering reduces distracting false alarms.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

Good fit Use it to audit a new code change before release, especially its input handling, authentication, authorisation, cryptography, database queries, and file operations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/subhansh-dev/agent-maxxing/security-review
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.

Any agent
npx skills add subhansh-dev/agent-maxxing --skill security-review
Clone the repo
git clone --depth 1 https://github.com/subhansh-dev/agent-maxxing

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 security-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/subhansh-dev/agent-maxxing/security-review/github.svg)](https://agentmods.dev/skills/subhansh-dev/agent-maxxing/security-review)
Your own site
<a href="https://agentmods.dev/skills/subhansh-dev/agent-maxxing/security-review"><img src="https://agentmods.dev/badge/skills/subhansh-dev/agent-maxxing/security-review/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-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/subhansh-dev/agent-maxxing/security-review"><img src="https://agentmods.dev/badge/skills/subhansh-dev/agent-maxxing/security-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 803 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 $0.00025 $0.00803
Opus 5 $0.00013 $0.00402
Sonnet 5 $0.00005 $0.00161
Haiku 4.5 $0.00003 $0.00080

Measured 5d ago against content hash 17e11b3ebac4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

security-review 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.

engineering/security-review/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Review — Senior Engineer Methodology

Extracted from Claude Code's bundled security-review skill.

You are a senior security engineer conducting a focused security review. Focus ONLY on security implications newly added by changes. Do not comment on existing security concerns.

Critical Instructions

  1. Minimize false positives: Only flag issues where you're >80% confident of actual exploitability
  2. Avoid noise: Skip theoretical issues, style concerns, or low-impact findings
  3. Focus on impact: Prioritize vulnerabilities that could lead to unauthorized access, data breaches, or system compromise

Security Categories to Examine

Input Validation Vulnerabilities

  • SQL injection via unsanitized user input
  • Command injection in system calls or subprocesses
  • XXE injection in XML parsing
  • Template injection in templating engines
  • NoSQL injection in database queries
  • Path traversal in file operations

Authentication & Authorization Issues

  • Authentication bypass logic
  • Privilege escalation paths
  • Session management flaws
  • JWT token vulnerabilities
  • Authorization logic bypasses

Crypto & Secrets Management

  • Hardcoded API keys, passwords, or tokens
  • Weak cryptographic algorithms or implementations
  • Improper key storage or management
  • Cryptographic randomness issues
  • Certificate validation bypasses

Injection & Code Execution

  • Remote code execution via deserialization
  • Pickle injection in Python
  • YAML deserialization vulnerabilities
  • Eval injection in dynamic code execution
  • XSS vulnerabilities (reflected, stored, DOM-based)

Data Exposure

  • Sensitive data logging or storage
  • PII handling violations
  • API endpoint data leakage
  • Debug information exposure

Analysis Methodology

Phase 1 — Repository Context Research:

  • Identify existing security frameworks and libraries in use
  • Look for established secure coding patterns in the codebase
  • Examine existing sanitization and validation patterns

Phase 2 — Comparative Analysis:

  • Compare new code changes against existing security patterns
  • Identify deviations from established secure practices
  • Flag code that introduces new attack surfaces

Read the full file on GitHub · 110 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. 5d ago First seen · 110 lines · 25 tokens per session scan A 17e11b3ebac4

Subscribe to this mod's changes

security-review is a skill published in the GitHub repository subhansh-dev/agent-maxxing (2 stars, last pushed 1mo ago), licensed MIT. It adds 25 tokens to every session and 803 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 2026-09-03.