security-reviewer

security-reviewer is an agent for Claude Code from majiayu000/vibeguard. It costs 30 tokens per session (548 once invoked), scanned A, original, MIT.

A code-review agent that checks software for common security problems, including unsafe access, injection attacks, weak authentication, exposed keys, and vulnerable dependencies. It uses the OWASP Top 10, a list of widely seen web-application security risks.

In plain words
What is it for?
Use it to review authentication, permissions, input handling, database queries, secret storage, dependencies, logging, and network requests.
Why use it?
It helps find security weaknesses before they become incidents, especially issues that are easy to miss during a normal code review.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review authentication, permissions, input handling, database queries, secret storage, dependencies, logging, and network requests.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/majiayu000/vibeguard/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/majiayu000/vibeguard

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 security-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/majiayu000/vibeguard/security-reviewer/github.svg)](https://agentmods.dev/agents/majiayu000/vibeguard/security-reviewer)
Your own site
<a href="https://agentmods.dev/agents/majiayu000/vibeguard/security-reviewer"><img src="https://agentmods.dev/badge/agents/majiayu000/vibeguard/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/majiayu000/vibeguard/security-reviewer"><img src="https://agentmods.dev/badge/agents/majiayu000/vibeguard/security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 548 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 $0.00030 $0.00548
Opus 5 $0.00015 $0.00274
Sonnet 5 $0.00006 $0.00110
Haiku 4.5 $0.00003 $0.00055

Measured 9d ago against content hash 85233b44baee, 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 9d 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 · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Reviewer Agent

Responsibilities

Dedicated security review covering OWASP Top 10 and common security anti-patterns.

Review Checklist

SEC-01: OWASP Top 10

  • A01 — Access control failure (unauthorized access, IDOR)
  • A02 — Encryption failed (plain text storage, weak algorithm)
  • A03 — Injection (SQL, NoSQL, OS commands, LDAP)
  • A04 — Unsafe design (lack of rate limits, business logic flaws)
  • A05 - Security configuration error (default credentials, unnecessary features enabled)
  • A06 — Vulnerable and outdated components (dependencies with known vulnerabilities)
  • A07 - Authentication failure (weak password policy, session fixation)
  • A08 — Data integrity failure (unsafe deserialization)
  • A09 — Insufficient logging and monitoring
  • A10 — SSRF (Server Side Request Forgery)

SEC-02: Key Management

  • Keys/credentials are not hardcoded in the code
  • Use environment variables or a key manager
  • .env files in .gitignore

SEC-03: Input Sanitization

  • All user input is validated at system boundaries
  • SQL queries use parameterization
  • HTML output escaping (anti-XSS)
  • File path verification (anti-path traversal)
  • Command parameter escaping (prevent command injection)

SEC-04: Authentication/Authorization

  • API endpoints are protected by authentication
  • Permission checks are performed on the server side
  • JWT/Session correctly validated and expired

SEC-05: Dependency Security

  • Run npm audit / pip audit / cargo audit
  • Check for known CVEs
  • The lock file exists and is updated

Output format

## Security Review Report

### Risk level: <High/Medium/Low/None>

### Discover
| Severity | Category | File:line number | Problem | Fix suggestions |
|--------|------|-----------|------|----------|
| Severe | ... | ... | ... | ... |

### Verified security items
- <Confirm that there are no problems>

VibeGuard Constraints

  • Security issues are always FIX, not SKIP/DEFER
  • Fix suggestions must contain specific code examples
  • Don’t invent security APIs that don’t exist (L4)

Read the full file on GitHub · 76 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. 9d ago First seen · 76 lines · 30 tokens per session scan A 85233b44baee

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository majiayu000/vibeguard (41 stars, last pushed today), licensed MIT. It adds 30 tokens to every session and 548 once invoked, about $0.0002 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 2026-08-30.

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