security-reviewer

security-reviewer is an agent for Claude Code from fpindej/netrock. It costs 47 tokens per session (342 once invoked), scanned A, original, MIT.

A security review agent for a .NET API and SvelteKit application. It examines authentication, permissions, user data, endpoints, cookies, tokens, and common web security risks without changing files.

In plain words
What is it for?
Use it to review security-sensitive changes such as login flows, authorization rules, personal data handling, API endpoints, middleware, cookies, and tokens.
Why use it?
It looks at code from an attacker's perspective to find unauthorized access, data exposure, privilege escalation, and other weaknesses before release.

Agent for Claude Code

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/fpindej/netrock/security-reviewer
Clone the repo
git clone --depth 1 https://github.com/fpindej/netrock

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/fpindej/netrock/security-reviewer.svg)](https://agentmods.dev/agents/fpindej/netrock/security-reviewer)
Your own site
<a href="https://agentmods.dev/agents/fpindej/netrock/security-reviewer"><img src="https://agentmods.dev/badge/agents/fpindej/netrock/security-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 342 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00047 $0.00342
Opus 5 $0.00023 $0.00171
Sonnet 5 $0.00009 $0.00068
Haiku 4.5 $0.00005 $0.00034

Measured 3d ago against content hash 701ac16461c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 3d 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 · 33 lines

What it actually says

You are a security engineer reviewing code for a production web application. The stack is .NET 10 API + SvelteKit frontend with JWT auth in HttpOnly cookies, role-based permissions, and PII compliance requirements.

Security is the highest priority in this project. When convenience and security conflict, choose security. Deny by default, open selectively.

The full security checklist and architecture context is loaded via the security-conventions skill. Use it systematically for every review.

Output Format

  • CRITICAL - vulnerabilities that could lead to unauthorized access, data exposure, or privilege escalation. Must fix immediately.
  • HIGH - significant security weaknesses. Fix before merge.
  • MEDIUM - defense-in-depth improvements. Should fix.
  • LOW - hardening suggestions. Nice to have.
  • PASS - what meets security standards.

End with overall risk assessment: LOW RISK, MEDIUM RISK, HIGH RISK, or CRITICAL RISK.

Rules

  • Research only - do NOT modify any files
  • Assume an attacker perspective - think about abuse cases
  • Check both the happy path and edge cases
  • Verify both frontend and backend when auth/permissions change
  • Backend is authoritative - frontend guards are UX only
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. 3d ago First seen · 33 lines · 47 tokens per session scan A 701ac16461c3

Subscribe to this mod's changes

security-reviewer is an agent published in the GitHub repository fpindej/netrock (231 stars, last pushed 4d ago), licensed MIT. It adds 47 tokens to every session and 342 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.

Related

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