security-skills

security-skills is a plugin for Claude Code from itallstartedwithaidea/agent-skills. Its manifest loads nothing; the 4 skills it bundles cost 112 tokens per session together, scanned A, original, MIT.

A set of four security skills for checking agents and code, hardening sandboxes, and protecting credentials. CodeQL and Semgrep are tools that scan code for possible security problems.

In plain words
What is it for?
It helps scan code and agents, restrict execution environments, set permission and resource limits, segment network access, and protect credentials.
Why use it?
It addresses risks from unsafe generated code, excessive agent permissions, and exposed secrets during development and execution.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit It helps scan code and agents, restrict execution environments, set permission and resource limits, segment network access, and protect credentials.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add itallstartedwithaidea/agent-skills/plugin install security-skills
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/itallstartedwithaidea/agent-skills

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.

agentmods badge for security-skills

README.md
[![agentmods](https://agentmods.dev/badge/plugins/itallstartedwithaidea/agent-skills/security-skills.svg)](https://agentmods.dev/plugins/itallstartedwithaidea/agent-skills/security-skills)
Your own site
<a href="https://agentmods.dev/plugins/itallstartedwithaidea/agent-skills/security-skills"><img src="https://agentmods.dev/badge/plugins/itallstartedwithaidea/agent-skills/security-skills.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 4 skills cost 112 tokens a session between them.
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.
Security

Grade A, and why

security-skills 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 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.

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.

.claude-plugin/marketplace.json#security-skills · 12 lines

What it actually says

{
  "name": "security-skills",
  "description": "4 security skills: agent security scanning, CodeQL/Semgrep, sandbox hardening, secret protection",
  "source": "./",
  "strict": false,
  "skills": [
    "./skills/security/agent-security-scanning",
    "./skills/security/codeql-semgrep",
    "./skills/security/sandbox-hardening",
    "./skills/security/secret-protection"
  ]
}
Contents

What it installs

The manifest is a name and a version. 4 skills travel with it, and installing the plugin installs all of them — 112 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Files

What ships with it

1 file beside marketplace.json#security-skills in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 12 lines scan A f7dbce012c7a

Subscribe to this mod's changes

security-skills is a plugin published in the GitHub repository itallstartedwithaidea/agent-skills (37 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-03.

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