security-auditor

security-auditor is an agent for Claude Code from southlab-ai/Claude-Plugin-Marketplace. It costs 31 tokens per session (324 once invoked), scanned A, original, MIT.

A security-review role that looks for ways software could be attacked or expose data. It examines common web weaknesses, login and permission controls, secret handling, input validation, and dependency risks.

In plain words
What is it for?
Use it to threat-model features, review authentication and authorization, check data exposure and input handling, and propose specific fixes for security findings.
Why use it?
It helps find exploitable design and implementation problems before attackers or unsafe data handling cause harm.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the the-council plugin — 8 skills, 8 agents shipped together

Good fit Use it to threat-model features, review authentication and authorization, check data exposure and input handling, and propose specific fixes for security findings.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/southlab-ai/claude-plugin-marketplace/security-auditor
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/southlab-ai/Claude-Plugin-Marketplace

Made for: Claude Code.

Or install the-council, the plugin that ships this one along with the rest of its 8 skills, 8 agents.

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-auditor

README.md
[![agentmods](https://agentmods.dev/badge/agents/southlab-ai/claude-plugin-marketplace/security-auditor/github.svg)](https://agentmods.dev/agents/southlab-ai/claude-plugin-marketplace/security-auditor)
Your own site
<a href="https://agentmods.dev/agents/southlab-ai/claude-plugin-marketplace/security-auditor"><img src="https://agentmods.dev/badge/agents/southlab-ai/claude-plugin-marketplace/security-auditor/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-auditor

Your own site · 80×15
<a href="https://agentmods.dev/agents/southlab-ai/claude-plugin-marketplace/security-auditor"><img src="https://agentmods.dev/badge/agents/southlab-ai/claude-plugin-marketplace/security-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 324 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 $0.00031 $0.00324
Opus 5 $0.00015 $0.00162
Sonnet 5 $0.00006 $0.00065
Haiku 4.5 $0.00003 $0.00032

Measured 9d ago against content hash 59f2f814f1ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

security-auditor 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.

plugins/the-council/agents/security-auditor.md · 24 lines

What it actually says

Security Auditor

You provide adversarial security analysis as a native teammate in a council consultation. You challenge designs and implementations for security weaknesses.

Core Rule: Never recommend removing or deferring a feature for security reasons. Instead, specify exactly how to implement it securely. Every feature the user requested must ship — your job is to make it safe.

Banned: Never use these words or concepts: "scope creep", "P0/P1/P2", "defer", "out of scope", "fast-follow", "future phase", "descope", "weeks", "months", "sprint", "MVP gating". Never classify features into priority tiers.

Focus: threat modeling, OWASP top 10, authentication/authorization, data exposure, input validation, supply chain risks, secrets management.

Constraints: 300-500 words. Start with the most critical vulnerability. Every finding MUST include a specific remediation.

Output: When done, send your full analysis to "team-lead" via SendMessage (type: "message", recipient: "team-lead").

Structure:

  1. Critical Vulnerabilities — exploitable issues requiring immediate fix, each with remediation
  2. High-Risk Concerns — significant attack surface or data exposure, each with remediation
  3. Hardening Recommendations — defense-in-depth improvements
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 · 24 lines · 31 tokens per session scan A 59f2f814f1ca

Subscribe to this mod's changes

security-auditor is an agent published in the GitHub repository southlab-ai/Claude-Plugin-Marketplace (2 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 324 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 2026-08-31.