A broad website SEO review that crawls up to 500 pages and combines checks from several specialist areas. SEO means improving a site so search engines can find, understand, and rank it.

Checking crawlability, indexing, page speed, mobile presentation, content quality, structured data, sitemaps, and search performance.

It brings technical, content, structured-data, sitemap, performance, and visual issues into one prioritized report.

seo-audit — Skill for Claude Code by lionkiii

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.

Any agent

npx skills add lionkiii/claude-seo-skills --skill seo-audit

Clone the repo

git clone --depth 1 https://github.com/lionkiii/claude-seo-skills

Made for: Claude Code.

Or install claude-seo-skills, the plugin that ships this one along with the rest of its 51 skills, 6 agents.

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/skills/lionkiii/claude-seo-skills/seo-audit/github.svg)](https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-audit)

Your own site

<a href="https://agentmods.dev/skills/lionkiii/claude-seo-skills/seo-audit"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-audit/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/skills/lionkiii/claude-seo-skills/seo-audit"><img src="https://agentmods.dev/badge/skills/lionkiii/claude-seo-skills/seo-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,512 The whole file, excluding the scripts and references it only reads on demand.

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.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00091	$0.01512
Opus 5	$0.00046	$0.00756
Sonnet 5	$0.00018	$0.00302
Haiku 4.5	$0.00009	$0.00151

Measured 12d ago against content hash dc40d1d4d891, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-audit 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 12d 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.

skills/seo-audit/SKILL.md · 195 lines

How it starts

The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Full Website SEO Audit

Process

Load reference — read seo/references/google-seo-guide.md for category-aligned checks
Fetch homepage — use scripts/fetch_page.py to retrieve HTML
Detect business type — analyze homepage signals per seo orchestrator
Crawl site — follow internal links up to 500 pages, respect robots.txt
Delegate to subagents (if available, otherwise run inline sequentially):
- seo-technical — robots.txt, sitemaps, canonicals, Core Web Vitals, security headers
- seo-content — E-E-A-T, readability, thin content, AI citation readiness
- seo-schema — detection, validation, generation recommendations
- seo-sitemap — structure analysis, quality gates, missing pages
- seo-performance — LCP, INP, CLS measurements
- seo-visual — screenshots, mobile testing, above-fold analysis
- seo-ai-optimization — AI search readiness (AI Overviews eligibility, llms.txt, AI crawler access) (if installed)
Score — aggregate into SEO Health Score (0-100)
Report — generate prioritized action plan

Crawl Configuration

Max pages: 500
Respect robots.txt: Yes
Follow redirects: Yes (max 3 hops)
Timeout per page: 30 seconds
Concurrent requests: 5
Delay between requests: 1 second

Output Files

FULL-AUDIT-REPORT.md — Comprehensive findings
ACTION-PLAN.md — Prioritized recommendations (Critical → High → Medium → Low)
screenshots/ — Desktop + mobile captures (if Playwright available)

Scoring Weights

Category	Weight
Technical SEO	25%
Content Quality	25%
On-Page SEO	20%
Schema / Structured Data	10%
Performance (CWV)	10%
Images	5%
AI Search Readiness	5%

Report Structure

Executive Summary

Overall SEO Health Score (0-100)
Business type detected
Top 5 critical issues
Top 5 quick wins

Technical SEO

Crawlability issues
Indexability problems
Security concerns
Core Web Vitals status

Read the full file on GitHub · 195 lines

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.

12d ago First seen · 195 lines · 91 tokens per session scan A dc40d1d4d891

Subscribe to this mod's changes

seo-audit is a skill published in the GitHub repository lionkiii/claude-seo-skills (20 stars, last pushed 3mo ago), licensed MIT. It adds 91 tokens to every session and 1,512 once invoked, about $0.0005 per session on Opus 5. 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.

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