agent-security

agent-security is a plugin for Claude Code from zero-lab-ai/skills. Its manifest loads nothing; the 4 skills it bundles cost 205 tokens per session together, scanned A, original, Apache-2.0.

A security review add-on for AI agents and MCP connections, where MCP is a way for an AI agent to use external tools and services. It examines those interfaces, instruction attacks, runtime controls, and identity handoffs.

In plain words
What is it for?
It is for reviewing agent and MCP security, testing prompt-injection and runtime protections, and mapping which identity has which authority across handoffs.
Why use it?
It helps reveal where authority or identity may be confused as work moves between agents, tools, and services.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit It is for reviewing agent and MCP security, testing prompt-injection and runtime protections, and mapping which identity has which authority across handoffs.

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

README.md
[![agentmods](https://agentmods.dev/badge/plugins/zero-lab-ai/skills/agent-security/github.svg)](https://agentmods.dev/plugins/zero-lab-ai/skills/agent-security)
Your own site
<a href="https://agentmods.dev/plugins/zero-lab-ai/skills/agent-security"><img src="https://agentmods.dev/badge/plugins/zero-lab-ai/skills/agent-security/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 agent-security

Your own site · 80×15
<a href="https://agentmods.dev/plugins/zero-lab-ai/skills/agent-security"><img src="https://agentmods.dev/badge/plugins/zero-lab-ai/skills/agent-security.svg" alt="Reviewed on agentmods" width="80" 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 205 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

agent-security 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 yesterday.

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.

plugins/agent-security/.claude-plugin/plugin.json · 11 lines

What it actually says

{
  "name": "agent-security",
  "version": "0.3.2",
  "description": "Reviews agent and MCP surfaces, tests prompt-injection and runtime controls, and maps identity and authority across agent handoffs.",
  "author": {
    "name": "zero-lab.ai",
    "email": "[email protected]",
    "url": "https://zero-lab.ai"
  }
}
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 — 205 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. yesterday First seen · 11 lines scan A fd1467f87513

Subscribe to this mod's changes

agent-security is a plugin published in the GitHub repository zero-lab-ai/skills (283 stars, last pushed 12d ago), licensed Apache-2.0. 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 2026-10-26.

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