security-scan

A security-audit skill for checking a Claude Code project’s configuration files, hooks, agents, and tool connections for unsafe settings or prompt-injection risks.

In plain words
What is it for?
It is for reviewing files such as CLAUDE.md, settings.json, MCP configuration, hooks, and agent definitions with AgentShield.
Why use it?
It helps find exposed secrets, overly broad permissions, dangerous commands, and other configuration problems before they cause harm.

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/x-cmd/skill/security-scan
Any agent
npx skills add x-cmd/skill --skill security-scan
Clone the repo
git clone --depth 1 https://github.com/x-cmd/skill

Made for: Claude Code, Codex.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,108 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00048 $0.01108
Opus 5 $0.00024 $0.00554
Sonnet 5 $0.00010 $0.00222
Haiku 4.5 $0.00005 $0.00111

Measured 2d ago against content hash 6facddfa83c1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security-scan scanned grade A with 1 finding 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 2d 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.

Reads MCP configurationlowAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

| `mcp.json` | Risky MCP servers, hardcoded env secrets, npx supply chain risks |

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

data/affaanmustafa/security-scan/SKILL.md · 166 lines

How it starts

The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Scan Skill

Audit your Claude Code configuration for security issues using AgentShield.

When to Activate

  • Setting up a new Claude Code project
  • After modifying .claude/settings.json, CLAUDE.md, or MCP configs
  • Before committing configuration changes
  • When onboarding to a new repository with existing Claude Code configs
  • Periodic security hygiene checks

What It Scans

File Checks
CLAUDE.md Hardcoded secrets, auto-run instructions, prompt injection patterns
settings.json Overly permissive allow lists, missing deny lists, dangerous bypass flags
mcp.json Risky MCP servers, hardcoded env secrets, npx supply chain risks
hooks/ Command injection via interpolation, data exfiltration, silent error suppression
agents/*.md Unrestricted tool access, prompt injection surface, missing model specs

Prerequisites

AgentShield must be installed. Check and install if needed:

# Check if installed
npx ecc-agentshield --version

# Install globally (recommended)
npm install -g ecc-agentshield

# Or run directly via npx (no install needed)
npx ecc-agentshield scan .

Usage

Basic Scan

Run against the current project's .claude/ directory:

# Scan current project
npx ecc-agentshield scan

# Scan a specific path
npx ecc-agentshield scan --path /path/to/.claude

# Scan with minimum severity filter
npx ecc-agentshield scan --min-severity medium

Output Formats

# Terminal output (default) — colored report with grade
npx ecc-agentshield scan

# JSON — for CI/CD integration
npx ecc-agentshield scan --format json

# Markdown — for documentation
npx ecc-agentshield scan --format markdown

# HTML — self-contained dark-theme report
npx ecc-agentshield scan --format html > security-report.html

Auto-Fix

Apply safe fixes automatically (only fixes marked as auto-fixable):

npx ecc-agentshield scan --fix

Read the full file on GitHub · 166 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. 2d ago First seen · 166 lines · 48 tokens per session scan A 6facddfa83c1

Subscribe to this mod's changes

security-scan is a skill published in the GitHub repository x-cmd/skill (26 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 48 tokens to every session and 1,108 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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