A post-launch website audit agent covering search visibility, trust signals, content, accessibility-related crawl issues, online stores, video, structured data, and related checks.

Use it to audit SEO, local search, e-commerce, schema, crawlability, content depth, Google Search Console behaviour, and redirects.

It brings many website quality checks into one audit after a site has been launched.

fat-agent — Plugin for Claude Code by spruikco/fat-agent-skill

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/spruikco/fat-agent-skill

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/spruikco/fat-agent-skill/fat-agent/github.svg)](https://agentmods.dev/plugins/spruikco/fat-agent-skill/fat-agent)

Your own site

<a href="https://agentmods.dev/plugins/spruikco/fat-agent-skill/fat-agent"><img src="https://agentmods.dev/badge/plugins/spruikco/fat-agent-skill/fat-agent/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/spruikco/fat-agent-skill/fat-agent"><img src="https://agentmods.dev/badge/plugins/spruikco/fat-agent-skill/fat-agent.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 2 skills, 3 commands cost 502 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

fat-agent 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 7d 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.

plugins/fat-agent/.claude-plugin/plugin.json · 20 lines

What it actually says

{
  "name": "fat-agent",
  "version": "3.14.1",
  "description": "FAT Agent with Superpowers (Fix, Audit, Test): modular post-launch QA audit with 23 modules incl. SEO, Google Guidelines (spam policies + doorway detection), E-E-A-T & Trust, AI Search/GEO, Technical SEO, Crawlability, Content-Depth, Local SEO, E-commerce, Video, Schema, GSC behavioural & redirect analysis, plus FAT Design, a six-lens design-taste audit (/fat-design).",
  "author": {
    "name": "Spruik Co",
    "url": "https://github.com/spruikco"
  },
  "license": "MIT",
  "homepage": "https://github.com/spruikco/fat-agent-skill",
  "skills": [
    "./skills/fat-agent",
    "./skills/fat-design"
  ],
  "commands": [
    "./commands/fat-audit.md",
    "./commands/fat-design.md"
  ]
}

Contents

What it installs

The manifest is a name and a version. 2 skills, 3 commands travel with it, and installing the plugin installs all of them — 502 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.

7d ago Changed 28e80cdc30b8
8d ago Changed 44f0fe91d00d
17d ago Changed · +2 lines 512fce1d1a0f
28d ago Changed 589d350ae68a
1mo ago Changed 7a46af008535
2mo ago First seen · 18 lines scan A 9de32143f663

Subscribe to this mod's changes

fat-agent is a plugin published in the GitHub repository spruikco/fat-agent-skill (40 stars, last pushed 7d 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 2026-08-30.

Analytics and metrics Marketing and SEO

fat-agent next to 6 plugins from other repositories
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