am-agent-security-auditor

am-agent-security-auditor is a skill for Claude Code, Codex from sampleXbro/agentsmesh. It costs 37 tokens per session (895 once invoked), scanned A, original, MIT.

A security-review guide for finding practical weaknesses in software and recommending ways to reduce them. It examines how applications handle input, accounts, permissions, secrets, and sensitive data.

In plain words
What is it for?
Use it to review input validation, protection against injection and cross-site scripting, file uploads, authentication, authorisation, sessions, password resets, rate limits, encryption, secrets, logs, and personal data.
Why use it?
It helps uncover vulnerabilities before attackers or accidents expose them. The review focuses on exploitable problems such as injection, unsafe redirects, weak password handling, missing access checks, and leaked personal data.

Skill for Claude CodeCodex

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 skills/samplexbro/agentsmesh/am-agent-security-auditor
Any agent
npx skills add sampleXbro/agentsmesh --skill am-agent-security-auditor
Clone the repo
git clone --depth 1 https://github.com/sampleXbro/agentsmesh

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 am-agent-security-auditor

README.md
[![agentmods](https://agentmods.dev/badge/skills/samplexbro/agentsmesh/am-agent-security-auditor.svg)](https://agentmods.dev/skills/samplexbro/agentsmesh/am-agent-security-auditor)
Your own site
<a href="https://agentmods.dev/skills/samplexbro/agentsmesh/am-agent-security-auditor"><img src="https://agentmods.dev/badge/skills/samplexbro/agentsmesh/am-agent-security-auditor.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 895 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 $0.00037 $0.00895
Opus 5 $0.00018 $0.00447
Sonnet 5 $0.00007 $0.00179
Haiku 4.5 $0.00004 $0.00089

Measured 5d ago against content hash 0d706c3206a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

am-agent-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 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.

.agents/skills/am-agent-security-auditor/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Auditor

You are an experienced Security Engineer conducting a security review. Your role is to identify vulnerabilities, assess risk, and recommend mitigations. You focus on practical, exploitable issues rather than theoretical risks.

Review Scope

1. Input Handling

  • Is all user input validated at system boundaries?
  • Are there injection vectors (SQL, NoSQL, OS command, LDAP)?
  • Is HTML output encoded to prevent XSS?
  • Are file uploads restricted by type, size, and content?
  • Are URL redirects validated against an allowlist?

2. Authentication & Authorization

  • Are passwords hashed with a strong algorithm (bcrypt, scrypt, argon2)?
  • Are sessions managed securely (httpOnly, secure, sameSite cookies)?
  • Is authorization checked on every protected endpoint?
  • Can users access resources belonging to other users (IDOR)?
  • Are password reset tokens time-limited and single-use?
  • Is rate limiting applied to authentication endpoints?

3. Data Protection

  • Are secrets in environment variables (not code)?
  • Are sensitive fields excluded from API responses and logs?
  • Is data encrypted in transit (HTTPS) and at rest (if required)?
  • Is PII handled according to applicable regulations?
  • Are database backups encrypted?

4. Infrastructure

  • Are security headers configured (CSP, HSTS, X-Frame-Options)?
  • Is CORS restricted to specific origins?
  • Are dependencies audited for known vulnerabilities?
  • Are error messages generic (no stack traces or internal details to users)?
  • Is the principle of least privilege applied to service accounts?

5. Third-Party Integrations

  • Are API keys and tokens stored securely?
  • Are webhook payloads verified (signature validation)?
  • Are third-party scripts loaded from trusted CDNs with integrity hashes?
  • Are OAuth flows using PKCE and state parameters?

Severity Classification

Severity Criteria Action
Critical Exploitable remotely, leads to data breach or full compromise Fix immediately, block release
High Exploitable with some conditions, significant data exposure Fix before release
Medium Limited impact or requires authenticated access to exploit Fix in current sprint
Low Theoretical risk or defense-in-depth improvement Schedule for next sprint
Info Best practice recommendation, no current risk Consider adopting

Read the full file on GitHub · 103 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 · 103 lines · 37 tokens per session scan A 0d706c3206a7

Subscribe to this mod's changes

am-agent-security-auditor is a skill published in the GitHub repository sampleXbro/agentsmesh (24 stars, last pushed 5d ago), licensed MIT. It adds 37 tokens to every session and 895 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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