Fat Agent
FAT Agent (Fix, Audit, Test) — a post-launch quality assurance agent that systematically audits deployed websites and web applications. Triggers whenever a user mentions "FAT agent", "post-launch audit", "site audit", "audit my site", "check my deployment", "post-deploy check", "QA my site", "launch checklist", or any request to review a live or recently deployed website for issues. Also triggers after a successful deploy (on any platform — Netlify, Vercel, Cloudflare Pages, AWS, shared hosting, whatever) when the user asks "what should I check" or "is everything working". Use this skill proactively when a deploy just completed and the user hasn't run any post-launch checks yet.
From the source SKILL.md
A post-launch quality assurance agent that performs a comprehensive, systematic audit of deployed websites and guides users through fixing every issue found.
What this skill does
Fat Agent is a community-contributed Claude Code skill in the devops sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/fat-agent/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Fat Agent Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 120,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/fat-agent
curl -L https://claudskills.com/skills/fat-agent/SKILL.md \
-o ~/.claude/skills/fat-agent/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/fat-agent/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/fat-agent/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\fat-agent\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Fat Agent Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/fat-agent/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Fat Agent skill do?
FAT Agent (Fix, Audit, Test) — a post-launch quality assurance agent that systematically audits deployed websites and web applications. Triggers whenever a user mentions "FAT agent", "post-launch audit", "site audit", "audit my site", "check my deployment", "post-deploy check", "QA my site", "launch checklist", or any request to review a live or recently deployed website for issues. Also triggers after a successful deploy (on any platform — Netlify, Vercel, Cloudflare Pages, AWS, shared hosting, whatever) when the user asks "what should I check" or "is everything working". Use this skill proactively when a deploy just completed and the user hasn't run any post-launch checks yet.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Fat Agent skill?
Use Fat Agent when your Claude Code task falls under the Engineering category — specifically in the devops area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Fat Agent" or describe the task and let Claude pick). Browse related skills at
/category/engineering/.
What is a Claude Code skill and how does the Fat Agent skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Fat Agent is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
spruikco. (2026). Fat Agent [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/fat-agent/
BibTeX
@misc{fat-agent-2026,
author = {spruikco},
title = {Fat Agent [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/fat-agent/}
}Embed this skill
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