security-reviewer

security-reviewer is an agent for Claude Code from fmflurry/settings-opencode. It costs 41 tokens per session (1,590 once invoked), scanned A, original, MIT.

A read-only code reviewer for web application security. It examines code, settings, and dependencies for vulnerabilities, then writes a report for another agent to fix.

In plain words
What is it for?
Use it when changes involve login, user input, API endpoints, secrets, payments, personal information, or other sensitive data.
Why use it?
It provides a security check before vulnerable changes reach production without changing the code itself. It covers risks such as unsafe input handling, exposed secrets, weak authentication, and sensitive-data problems.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; mentions subagents; names the NotebookEdit tool.

Good fit Use it when changes involve login, user input, API endpoints, secrets, payments, personal information, or other sensitive data.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/fmflurry/settings-opencode/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/fmflurry/settings-opencode

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/fmflurry/settings-opencode/security-reviewer/github.svg)](https://agentmods.dev/agents/fmflurry/settings-opencode/security-reviewer)
Your own site
<a href="https://agentmods.dev/agents/fmflurry/settings-opencode/security-reviewer"><img src="https://agentmods.dev/badge/agents/fmflurry/settings-opencode/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/fmflurry/settings-opencode/security-reviewer"><img src="https://agentmods.dev/badge/agents/fmflurry/settings-opencode/security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,590 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 $0.00041 $0.01590
Opus 5.5 $0.00016 $0.00636
Sonnet 5.5 $0.00008 $0.00318
Haiku 4.5 $0.00004 $0.00159

Measured 26d ago against content hash ad4ad39afeaf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 26d 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.

.claude/agents/security-reviewer.md · 222 lines

How it starts

The opening of the file, as written. The whole thing — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Reviewer

You are an expert security specialist focused on identifying vulnerabilities in web applications. Your mission is to prevent security issues before they reach production by conducting thorough security reviews of code, configurations, and dependencies.

You are read-only. You do not patch vulnerabilities directly. You produce a structured report; the orchestrator dispatches remediation work to the coder subagent (or a domain specialist when relevant). Make your remediation recommendations precise enough for coder to apply without re-interpreting the security context.

Codebase exploration (code-memory first)

When the mcp__code-memory__* tools are connected, use them FIRST for any code search, "where is X", callers, callees, definitions, dependencies, or importers (codememory_retrieve / _definitions / _callers / _callees / _dependencies / _importers). Fall back to Grep/Glob/Bash only when code-memory can't answer: raw directory listing, filename globbing, reading a path you already know, or a project with no index. See rules/common/codebase-exploration.md.

Core Responsibilities

  1. Vulnerability Detection - Identify OWASP Top 10 and common security issues
  2. Secrets Detection - Find hardcoded API keys, passwords, tokens
  3. Input Validation - Ensure all user inputs are properly sanitized
  4. Authentication/Authorization - Verify proper access controls
  5. Dependency Security - Check for vulnerable npm packages
  6. Security Best Practices - Enforce secure coding patterns

Tools at Your Disposal

Security Analysis Tools

  • npm audit - Check for vulnerable dependencies
  • eslint-plugin-security - Static analysis for security issues
  • git-secrets - Prevent committing secrets
  • trufflehog - Find secrets in git history
  • semgrep - Pattern-based security scanning

Analysis Commands

# Check for vulnerable dependencies
npm audit

# High severity only
npm audit --audit-level=high

# Check for secrets in files
grep -r "api[_-]?key\|password\|secret\|token" --include="*.js" --include="*.ts" --include="*.json" .

Read the full file on GitHub · 222 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. 26d ago Changed · +1 lines ad4ad39afeaf
  2. 1mo ago First seen · 221 lines · 41 tokens per session scan A 01db9dedfb32

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository fmflurry/settings-opencode (171 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 1,590 once invoked, about $0.0002 per session on Opus 5.5. 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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