A host security scanner for macOS and Linux that checks computer settings, network configuration, and development prerequisites.

Use it to run a full security scan of the current computer or perform the available local checks.

It identifies security misconfigurations and missing requirements, and can install the AgentKeeper command if needed.

scan — Skill for Claude Code by rad-security/claude-code-plugin

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 rad-security/claude-code-plugin --skill scan

Clone the repo

git clone --depth 1 https://github.com/rad-security/claude-code-plugin

Made for: Claude Code.

Or install agentkeeper, the plugin that ships this one along with the rest of its 13 skills, 4 hooks.

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/skills/rad-security/claude-code-plugin/scan/github.svg)](https://agentmods.dev/skills/rad-security/claude-code-plugin/scan)

Your own site

<a href="https://agentmods.dev/skills/rad-security/claude-code-plugin/scan"><img src="https://agentmods.dev/badge/skills/rad-security/claude-code-plugin/scan/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/skills/rad-security/claude-code-plugin/scan"><img src="https://agentmods.dev/badge/skills/rad-security/claude-code-plugin/scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 868 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 2 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	$0.00040	$0.00868
Opus 5.5	$0.00016	$0.00347
Sonnet 5.5	$0.00008	$0.00174
Haiku 4.5	$0.00004	$0.00087

Measured 2mo ago against content hash 6737fa671d59, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

scan scanned grade B with 2 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 2mo 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.

Downloads and executes remote codemediumSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://www.agentkeeper.dev/install.sh | bash

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

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://www.agentkeeper.dev/install.sh | bash

plugins/agentkeeper/skills/scan/SKILL.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AgentKeeper Host Security Scan

You are running the AgentKeeper CLI security scanner on the user's machine.

Step 1: Check if AgentKeeper CLI is Installed

which agentkeeper 2>/dev/null || command -v agentkeeper 2>/dev/null

If installed:

Proceed to Step 2.

If not installed:

Display:

AgentKeeper CLI not found.

The AgentKeeper CLI runs 39 security checks across your host configuration,
network settings, and development environment.

Would you like to install it? It takes about 10 seconds:

    curl -fsSL https://www.agentkeeper.dev/install.sh | bash

This installs the `agentkeeper` command to /usr/local/bin.

Ask the user if they want to install. If yes, run:

curl -fsSL https://www.agentkeeper.dev/install.sh | bash

If the install fails, show the error output and suggest:

Installation failed. You can also:
  - Download manually: https://www.agentkeeper.dev/install.sh
  - Or run directly without installing:
    curl -fsSL https://www.agentkeeper.dev/install.sh | bash -s -- --run-only

After successful install, proceed to Step 2.

If the user declines installation, display:

No problem. You can still use these local checks:
  /agentkeeper:audit — audit your Claude Code configuration
  /agentkeeper:secrets — scan for exposed secrets

Stop here.

Step 2: Run the Scanner

Run the AgentKeeper scanner:

agentkeeper scan 2>&1

If the command takes too long (>30 seconds), it may be running interactive prompts. Use:

agentkeeper scan --non-interactive 2>&1

If the scan command is not recognized, try the alternative:

agentkeeper agent run 2>&1

Step 3: Display Results

The scanner outputs a JSON report or formatted text. Display the results inline.

If the output is JSON, parse it and format it as a readable report:

AgentKeeper Host Security Scan

Grade: [letter_grade]
Score: [score]/[total]

Phase 1: macOS Host Security
  [PASS|FAIL|SKIP]  [check_name] — [detail]
  ...

Phase 2: Network Configuration
  [PASS|FAIL|SKIP]  [check_name] — [detail]
  ...

Phase 3: Prerequisites
  [PASS|FAIL|SKIP]  [check_name] — [detail]
  ...

Phase 4: Security Audit
  [PASS|FAIL|SKIP]  [check_name] — [detail]
  ...

[summary line with pass/fail/skip counts]

Read the full file on GitHub · 133 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.

2mo ago First seen · 133 lines · 40 tokens per session scan B 6737fa671d59

Subscribe to this mod's changes

scan is a skill published in the GitHub repository rad-security/claude-code-plugin (3 stars, last pushed 23d ago), licensed MIT. It adds 40 tokens to every session and 868 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it B with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.