A security review checklist for source code, dependencies, settings, and stored data. It looks for common risks such as leaked secrets, unsafe database queries, cross-site scripting, and missing access controls.

Auditing dependencies, scanning for credentials, reviewing SQL and browser output, checking authentication and CORS settings, and inspecting sensitive data handling.

It gives developers a repeatable way to spot security problems before they reach users or production.

security — Command for Claude Code by Cristhianzl

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/Cristhianzl/claude-skills-czl

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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/cristhianzl/claude-skills-czl/security/github.svg)](https://agentmods.dev/commands/cristhianzl/claude-skills-czl/security)

Your own site

<a href="https://agentmods.dev/commands/cristhianzl/claude-skills-czl/security"><img src="https://agentmods.dev/badge/commands/cristhianzl/claude-skills-czl/security/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/cristhianzl/claude-skills-czl/security"><img src="https://agentmods.dev/badge/commands/cristhianzl/claude-skills-czl/security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 381 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.

Model	Per session	Once invoked
Fable 5.1	$0.00003	$0.00381
Opus 5	$0.00002	$0.00191
Sonnet 5	$0.00001	$0.00076
Haiku 4.5	$0.00000	$0.00038

Measured 12d ago against content hash 49b696431e63, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

security 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 12d 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.

configs/agnostic/commands/security.md · 70 lines

What it actually says

/security

Static and dependency audit. Use the Grep tool (not bash grep).

1. Dependencies

Run the project's dependency audit (<dependency audit command>)
Review reported vulnerabilities by severity

2. Secrets

Grep for:

password\s*=\s*["']
api_key\s*=\s*["']
(secret|token)\s*=\s*["'][^"']+["']

Verify .env* is in .gitignore.

3. SQL injection

Grep for string-built SQL:

execute\(f["'] or execute\(["'].*\{ (f-string in SQL)
Query builders without bind params

OK: parameterized queries with bind params. Bad: f-string interpolation into SQL.

4. XSS

Grep dangerouslySetInnerHTML. Each occurrence must be sanitized.

5. Auth

List private endpoints without an auth dependency. Flag the ones that look private.

6. CORS / Headers

allow_origins=["*"] in production = critical
Security headers: CSP, X-Frame-Options, X-Content-Type-Options

7. Sensitive data

Personal data (emails, IDs) in logs (Grep logger.*email and similar)
Sensitive fields hashed/encrypted in models

Report

Security
Deps:    <✅ | ⚠️ N>
Secrets: ✅
SQLi:    ✅
XSS:     ✅
Auth:    ⚠️ N public endpoints
CORS:    ✅
Data:    ✅

Critical:
- ...

Recommendations:
- ...

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.

12d ago First seen · 70 lines · 3 tokens per session scan A 49b696431e63

Subscribe to this mod's changes

security is a command published in the GitHub repository Cristhianzl/claude-skills-czl (5 stars, last pushed yesterday), licensed MIT. It adds 3 tokens to every session and 381 once invoked, about $0.0000 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.

Claude Code Security agent-skills ai-agents anthropic claude claude-skills

security