SEO: Universal SEO Analysis Skill
SkillWeb & browsingComprehensive SEO analysis for any website or business type. Full site audits, single-page analysis, technical SEO (crawlability, indexability, Core Web Vitals with INP), schema markup, content quality (E-E-A-T), image optimization, sitemap analysis, and GEO for AI Overviews/ChatGPT/Perplexity. Industry detection for SaaS, e-commerce, local, publishers, agencies. Triggers on: SEO, audit, schema, Core Web Vitals, sitemap, E-E-A-T, AI Overviews, GEO, technical SEO, content quality, page speed, structured data.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the SEO: Universal SEO Analysis Skill skill
What this skill tells your AI
The instructions your AI receives, as published by hashgraph-online/awesome-codex-plugins in plugins/BestLemoon/codex-seo/skills/seo/SKILL.md and read by ahel’s review.
Invocation: /seo $1 $2 where $1 is the command and $2 is the URL or argument.
Scripts: Located at the plugin root scripts/ directory.
Comprehensive SEO analysis across all industries (SaaS, local services, e-commerce, publishers, agencies). Orchestrates 16 specialized sub-skills and 11 subagents (+ 3 optional extension sub-skills: seo-dataforseo, seo-firecrawl, and seo-image-gen).
Quick Reference
| Command | What it does |
|---|---|
/seo audit <url> | Full website audit with parallel subagent delegation |
/seo page <url> | Deep single-page analysis |
/seo sitemap <url or generate> | Analyze or generate XML sitemaps |
/seo schema <url> | Detect, validate, and generate Schema.org markup |
/seo images <url> | Image optimization analysis |
/seo technical <url> | Technical SEO audit (9 categories) |
/seo content <url> | E-E-A-T and content quality analysis |
/seo geo <url> | AI Overviews / Generative Engine Optimization |
/seo plan <business-type> | Strategic SEO planning |
/seo programmatic [url|plan] | Programmatic SEO analysis and planning |
/seo competitor-pages [url|generate] | Competitor comparison page generation |
/seo local <url> | Local SEO analysis (GBP, citations, reviews, map pack) |
/seo maps [command] [args] | Maps intelligence (geo-grid, GBP audit, reviews, competitors) |
/seo hreflang [url] | Hreflang/i18n SEO audit and generation |
/seo google [command] [url] | Google SEO APIs (GSC, PageSpeed, CrUX, Indexing, GA4) |
/seo backlinks <url> | Backlink profile analysis (free: Moz, Bing, CC; premium: DataForSEO) |
/seo firecrawl [command] <url> | Full-site crawling and site mapping (extension) |
/seo dataforseo [command] | Live SEO data via DataForSEO (extension) |
/seo image-gen [use-case] <description> | AI image generation for SEO assets (extension) |
Orchestration Logic
When the user invokes /seo audit, delegate to subagents in parallel:
- Detect business type (SaaS, local, ecommerce, publisher, agency, other)
- Spawn subagents: seo-technical, seo-content, seo-schema, seo-sitemap, seo-performance, seo-visual, seo-geo
- If Google API credentials detected (
python scripts/google_auth.py --check), also spawn seo-google agent - If local business detected, also spawn seo-local agent
- If local business detected AND DataForSEO MCP available, also spawn seo-maps agent
- If backlink APIs detected (
python scripts/backlinks_auth.py --check), also spawn seo-backlinks agent - If Firecrawl MCP available, use
firecrawl_mapto discover all site URLs before analysis - Collect results and generate unified report with SEO Health Score (0-100)
- Create prioritized action plan (Critical -> High -> Medium -> Low)
- Offer PDF report: "Generate a professional PDF report? Use
/seo google report full"
For individual commands, load the relevant sub-skill directly.
After any analysis command completes, offer to generate a PDF report via scripts/google_report.py.
Industry Detection
Detect business type from homepage signals:
- SaaS: pricing page, /features, /integrations, /docs, "free trial", "sign up"
- Local Service: phone number, address, service area, "serving [city]", Google Maps embed --> auto-suggest
/seo localfor deeper analysis - E-commerce: /products, /collections, /cart, "add to cart", product schema
- Publisher: /blog, /articles, /topics, article schema, author pages, publication dates
- Agency: /case-studies, /portfolio, /industries, "our work", client logos
Quality Gates
Read references/quality-gates.md for thin content thresholds per page type.
Hard rules:
- WARNING at 30+ location pages (enforce 60%+ unique content)
- HARD STOP at 50+ location pages (require user justification)
- Never recommend HowTo schema (deprecated Sept 2023)
- FAQ schema for Google rich results: only government and healthcare sites (Aug 2023 restriction); existing FAQPage on commercial sites -> flag Info priority (not Critical), noting AI/LLM citation benefit; adding new FAQPage -> not recommended for Google benefit
- All Core Web Vitals references use INP, never FID
Reference Files
Load these on-demand as needed (do NOT load all at startup):
references/cwv-thresholds.md: Current Core Web Vitals thresholds and measurement detailsreferences/schema-types.md: All supported schema types with deprecation statusreferences/eeat-framework.md: E-E-A-T evaluation criteria (Sept 2025 QRG update)references/quality-gates.md: Content length minimums, uniqueness thresholdsreferences/local-seo-signals.md: Local ranking factors, review benchmarks, citation tiers, GBP statusreferences/local-schema-types.md: LocalBusiness subtypes, industry-specific schema and citation sources
Maps-specific references (loaded by seo-maps skill, not at startup):
references/maps-geo-grid.md,references/maps-gbp-checklist.md,references/maps-api-endpoints.md,references/maps-free-apis.md
Scoring Methodology
SEO Health Score (0-100)
Weighted aggregate of all categories:
| Category | Weight |
|---|---|
| Technical SEO | 22% |
| Content Quality | 23% |
| On-Page SEO | 20% |
| Schema / Structured Data | 10% |
| Performance (CWV) | 10% |
| AI Search Readiness | 10% |
| Images | 5% |
Priority Levels
- Critical: Blocks indexing or causes penalties (immediate fix required)
- High: Significantly impacts rankings (fix within 1 week)
- Medium: Optimization opportunity (fix within 1 month)
- Low: Nice to have (backlog)
Sub-Skills
This skill orchestrates 15 specialized sub-skills (+ 2 extensions):
- seo-audit -- Full website audit with parallel delegation
- seo-page -- Deep single-page analysis
- seo-technical -- Technical SEO (9 categories)
- seo-content -- E-E-A-T and content quality
- seo-schema -- Schema markup detection and generation
- seo-images -- Image optimization
- seo-sitemap -- Sitemap analysis and generation
- seo-geo -- AI Overviews / GEO optimization
- seo-plan -- Strategic planning with templates
- seo-programmatic -- Programmatic SEO analysis and planning
- seo-competitor-pages -- Competitor comparison page generation
- seo-hreflang -- Hreflang/i18n SEO audit and generation
- seo-local -- Local SEO (GBP, NAP, citations, reviews, local schema, multi-location)
- seo-maps -- Maps intelligence (geo-grid, GBP audit, reviews, competitor radius)
- seo-google -- Google SEO APIs (GSC, PageSpeed, CrUX, Indexing API, GA4)
- seo-backlinks -- Backlink profile analysis (free: Moz, Bing, CC; premium: DataForSEO)
- seo-firecrawl -- Full-site crawling and site mapping via Firecrawl MCP (extension)
- seo-dataforseo -- Live SEO data via DataForSEO MCP (extension)
- seo-image-gen -- AI image generation for SEO assets via Gemini (extension)
Subagents
For parallel analysis during audits:
seo-technical-- Crawlability, indexability, security, CWVseo-content-- E-E-A-T, readability, thin contentseo-schema-- Detection, validation, generationseo-sitemap-- Structure, coverage, quality gatesseo-performance-- Core Web Vitals measurementseo-visual-- Screenshots, mobile testing, above-foldseo-geo-- AI crawler access, llms.txt, citability, brand mention signalsseo-local-- GBP signals, NAP consistency, reviews, local schema, industry-specific local factors (conditional: spawned when Local Service detected)seo-maps-- Geo-grid rank tracking, GBP audit, review intelligence, competitor radius mapping (conditional: spawned when Local Service detected AND DataForSEO MCP available)seo-google-- CWV field data, URL indexation status, organic traffic trends (conditional: spawned when Google API credentials detected)seo-backlinks-- Backlink profile data: DA/PA, referring domains, anchor text, toxic links (conditional: spawned when Moz/Bing API keys detected or always for CC domain-level metrics)seo-dataforseo-- Live SERP, keyword, backlink, local SEO data (extension, optional)seo-image-gen-- SEO image audit and generation plan (extension, optional)seo-firecrawl-- Full-site crawl and site mapping (extension, optional; used by audit for URL discovery)
Error Handling
| Scenario | Action |
|---|---|
| Unrecognized command | List available commands from the Quick Reference table. Suggest the closest matching command. |
| URL unreachable | Report the error and suggest the user verify the URL. Do not attempt to guess site content. |
| Sub-skill fails during audit | Report partial results from successful sub-skills. Clearly note which sub-skill failed and why. Suggest re-running the failed sub-skill individually. |
| Ambiguous business type detection | Present the top two detected types with supporting signals. Ask the user to confirm before proceeding with industry-specific recommendations. |
Signals
- GitHub stars
- 985
- Forks
- 276
- Last commit
- Sep 2026
Advanced
- Catalog kind
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- Gateway key
seo-hashgraph-online- Source
- github.com/hashgraph-online/awesome-codex-plugins