skill-scanner

skill-scanner is a skill for Claude Code from redhat-community-ai-tools/claude-plugins. It costs 113 tokens per session (2,440 once invoked), scanned D, original, no licence file.

A security-scanning skill for checking installed Claude Code skills and plugins for vulnerabilities and harmful instructions. It can be used when you want to assess whether an extension is safe.

In plain words
What is it for?
Use it to scan skills and plugins and investigate their security.
Why use it?
It helps you find malicious or risky instructions before trusting a skill or plugin.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the skill-scanner plugin — 1 skill, 1 command shipped together

Good fit Use it to scan skills and plugins and investigate their security.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/redhat-community-ai-tools/claude-plugins/skill-scanner
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 redhat-community-ai-tools/claude-plugins --skill skill-scanner
Clone the repo
git clone --depth 1 https://github.com/redhat-community-ai-tools/claude-plugins

Made for: Claude Code.

Or install skill-scanner, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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 skill-scanner

README.md
[![agentmods](https://agentmods.dev/badge/skills/redhat-community-ai-tools/claude-plugins/skill-scanner/github.svg)](https://agentmods.dev/skills/redhat-community-ai-tools/claude-plugins/skill-scanner)
Your own site
<a href="https://agentmods.dev/skills/redhat-community-ai-tools/claude-plugins/skill-scanner"><img src="https://agentmods.dev/badge/skills/redhat-community-ai-tools/claude-plugins/skill-scanner/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 skill-scanner

Your own site · 80×15
<a href="https://agentmods.dev/skills/redhat-community-ai-tools/claude-plugins/skill-scanner"><img src="https://agentmods.dev/badge/skills/redhat-community-ai-tools/claude-plugins/skill-scanner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,440 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 5 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00113 $0.02440
Opus 5.5 $0.00045 $0.00976
Sonnet 5.5 $0.00023 $0.00488
Haiku 4.5 $0.00011 $0.00244

Measured 1mo ago against content hash dbecb0d093f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade D, and why

skill-scanner scanned grade D with 5 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 1mo 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

- Overriding safety: "ignore previous instructions", "disregard safety", "bypass permission", "skip verification", "override policy", "you are now", "forget your rules"

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

Reaches for credential filesmediumPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

- SSH config: `~/.ssh/config`, `~/.ssh/authorized_keys`

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

Reads agent configuration directorieslowAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

find ~/.claude/plugins/cache -name "SKILL.md" -o -name "*.md" -path "*/commands/*" | sort

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

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- File deletion: `rm -rf`, `rm -f`, `shred`, `unlink`, `rmdir` on important paths

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.

- Sending data externally: `curl`, `wget`, `fetch`, `http`, `https://`, `nc`, `netcat`, `socat`, any URL that isn't clearly documentation
plugins/skill-scanner/skills/skill-scanner/SKILL.md · 216 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 1mo ago First seen · 216 lines · 113 tokens per session scan D dbecb0d093f2

Subscribe to this mod's changes

skill-scanner is a skill published in the GitHub repository redhat-community-ai-tools/claude-plugins (14 stars, last pushed 26d ago), with no licence file. It adds 113 tokens to every session and 2,440 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it D with 5 findings (instruction-override phrasing, reaches for credential files, reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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