What is catpilot-guardrails?

A security-skills plugin with plain-language checkpoints for people building with an AI assistant and engineering guidance for coding agents.

Use it for safer AI-assisted building and security-focused agent guidance.

It gives security advice without hooks, tool servers, or telemetry running in the background.

catpilot-guardrails — Plugin for Claude Code by catpilotai

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/catpilotai/catpilot-ai-guardrails

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails/github.svg)](https://agentmods.dev/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails)

Your own site

<a href="https://agentmods.dev/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails"><img src="https://agentmods.dev/badge/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails/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/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails"><img src="https://agentmods.dev/badge/plugins/catpilotai/catpilot-ai-guardrails/catpilot-ai-guardrails.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 25 skills cost 1,937 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

catpilot-guardrails 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 8d 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/plugin.json · 12 lines

What it actually says

{
  "name": "catpilot-guardrails",
  "displayName": "Catpilot Guardrails",
  "version": "2026.09.18",
  "description": "Three security skills in the Agent Skills format: catpilot-safe-building, eight plain-language checkpoints for a person building with an AI assistant; catpilot-security-core, nine engineering components for coding agents; and catpilot-agentic-security, five components for agent loops. Advice the model reads. This plugin carries no hooks, no MCP servers, and no telemetry.",
  "author": { "name": "Catpilot", "url": "https://catpilot.ai" },
  "homepage": "https://github.com/catpilotai/catpilot-ai-guardrails",
  "repository": "https://github.com/catpilotai/catpilot-ai-guardrails",
  "license": "MIT",
  "keywords": ["security", "guardrails", "safe-building", "skills"]
}

Contents

What it installs

The manifest is a name and a version. 25 skills travel with it, and installing the plugin installs all of them — 1,937 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 plugin.json 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.

marketplace.json 519 B

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.

8d ago Changed 88c6de9c2413
10d ago Changed 6551a012df83
1mo ago First seen · 12 lines scan A d7f5b9645067

Subscribe to this mod's changes

catpilot-guardrails is a plugin published in the GitHub repository catpilotai/catpilot-ai-guardrails (2 stars, last pushed 8d 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 2026-09-21.

AI Safety Claude Code Security agent-harness agent-skills ai-agents chatgpt

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