skill-security-scan

skill-security-scan is a skill for Claude Code, Codex from aris4u-dev/aris4u. It costs 216 tokens per session (799 once invoked), scanned A, original, no licence file.

A pre-installation security scanner for third-party skills, plugins, and MCP servers. It checks repositories, directories, ZIP files, or URLs for threats such as prompt injection, data theft, and credential collection, using a local Ollama model.

In plain words
What is it for?
Use it to scan third-party add-ons and their source packages before installation, while keeping the semantic analysis on the local Mac.
Why use it?
It helps detect suspicious instructions or code before an add-on from outside the project is installed.

Skill for Claude CodeCodex

Part of the aris4u plugin — 25 skills, 15 agents, 7 hooks, 1 MCP server shipped together

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/aris4u-dev/aris4u/skill-security-scan
Any agent
npx skills add aris4u-dev/aris4u --skill skill-security-scan
Clone the repo
git clone --depth 1 https://github.com/aris4u-dev/aris4u

Made for: Claude Code, Codex.

Or install aris4u, the plugin that ships this one along with the rest of its 25 skills, 15 agents, 7 hooks, 1 MCP server.

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-security-scan

README.md
[![agentmods](https://agentmods.dev/badge/skills/aris4u-dev/aris4u/skill-security-scan.svg)](https://agentmods.dev/skills/aris4u-dev/aris4u/skill-security-scan)
Your own site
<a href="https://agentmods.dev/skills/aris4u-dev/aris4u/skill-security-scan"><img src="https://agentmods.dev/badge/skills/aris4u-dev/aris4u/skill-security-scan.svg" alt="Measured on agentmods" height="20"></a>
Per session 216 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 799 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00216 $0.00799
Opus 5 $0.00108 $0.00400
Sonnet 5 $0.00043 $0.00160
Haiku 4.5 $0.00022 $0.00080

Measured 4d ago against content hash 001d0f845fbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-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 4d 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.

Makes network callslowCapability

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

viewers), `curl|bash` de instaladores conocidos, `ALTER/DROP TABLE` en migraciones,
skills/skill-security-scan/SKILL.md · 60 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 4d ago First seen · 60 lines · 216 tokens per session scan A 001d0f845fbd

Subscribe to this mod's changes

skill-security-scan is a skill published in the GitHub repository aris4u-dev/aris4u (0 stars, last pushed 1mo ago), with no licence file. It adds 216 tokens to every session and 799 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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