security-audit

security-audit is a skill for Claude Code, Codex from louisbrulenaudet/monorepo-template. It costs 72 tokens per session (4,447 once invoked), scanned A, a copy of security-audit, Apache-2.0.

A defensive guide for reviewing code, APIs, services, command-line tools, libraries, and background services for security weaknesses. It checks whether a weakness crosses a real trust boundary, meaning it lets an untrusted party affect protected data or actions.

In plain words
What is it for?
Use it to answer security questions, investigate vulnerabilities, review a specific area, or perform an explicitly requested full codebase audit or penetration test.
Why use it?
It prevents vague security claims by requiring evidence, a safe reproduction, a clear impact, and a practical fix. It also separates focused advice from a complete audit or penetration test, which is a security test that imitates an attacker.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents; installed under .agents/ (shared by several agents).

Good fit Use it to answer security questions, investigate vulnerabilities, review a specific area, or perform an explicitly requested full codebase audit or penetration test.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/louisbrulenaudet/monorepo-template/security-audit
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.

Any agent
npx skills add louisbrulenaudet/monorepo-template --skill security-audit
Clone the repo
git clone --depth 1 https://github.com/louisbrulenaudet/monorepo-template

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 security-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/security-audit/github.svg)](https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/security-audit)
Your own site
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/security-audit"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/security-audit/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-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/louisbrulenaudet/monorepo-template/security-audit"><img src="https://agentmods.dev/badge/skills/louisbrulenaudet/monorepo-template/security-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,447 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 100% copy Near-identical to another mod 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 $0.00072 $0.04447
Opus 5.5 $0.00029 $0.01779
Sonnet 5.5 $0.00014 $0.00889
Haiku 4.5 $0.00007 $0.00445

Measured 22d ago against content hash 5e3e96a1e438, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security-audit 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 22d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (validate-coverage-ledger.cjs, validate-coverage-ledger.test.cjs, validate-findings.cjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

100% identical to security-audit — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/security-audit/SKILL.md · 193 lines

How it starts

The opening of the file, as written. The whole thing — 193 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Audit

Find vulnerabilities that violate a real trust boundary, then give owners the source evidence, safe reproduction, priority, and smallest effective fix. This is a defensive, source-first workflow. A candidate without a concrete affected principal, resource, or security outcome is not a confirmed finding.

Operating modes

This skill is guidance by default. Loading it does not authorize the complete audit workflow or file creation.

  • Guidance mode: For security questions, focused reviews, methodology, triage, or investigation of specific findings, use only the relevant parts of this skill. Do not automatically run all six phases, create an output directory, or write audit artifacts. You may launch focused agents when useful; they return results to the current task.
  • Full audit mode: Use the complete workflow when the user explicitly asks to audit or pen-test a codebase, asks for a full, comprehensive, or end-to-end security review, or requests report artifacts. Run all six phases and write the files defined below.

If the request could mean either mode, ask one focused question before creating files or starting the complete workflow.

Platform terminology

This skill is agent-neutral:

  • Parent is the agent that coordinates the run and owns shared state.
  • Task tool is the platform's delegation or sub-agent mechanism.
  • research agent is a delegated agent for focused source exploration and factual verification.
  • general agent is a delegated agent for broad investigation and bounded local execution.
  • subagent_type: in a heading names which of these two delegated agent roles runs that work.

Use equivalent platform capabilities while preserving role, write-isolation, prompt, and independence boundaries.

Universal execution safety

These rules apply in both operating modes. Source inspection is read-only. Run target-controlled builds, tests, processes, browsers, emulators, fuzzers, and fixture processing only inside an OS-enforced sandbox that provides all of these controls:

Read the full file on GitHub · 193 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. 22d ago First seen · 193 lines · 72 tokens per session scan A 5e3e96a1e438

Subscribe to this mod's changes

security-audit is a skill published in the GitHub repository louisbrulenaudet/monorepo-template (19 stars, last pushed 2d ago), licensed Apache-2.0. It adds 72 tokens to every session and 4,447 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to security-audit, differing in 0 lines, and is treated as a copy.

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