seo-sitemap
Analyze existing XML sitemaps or generate new ones with industry templates. Validates format, URLs, and structure. Use when user says "sitemap", "generate sitemap", "sitemap issues", or "XML sitemap".
By agricidaniel · 5,726 installs
npx skills add agricidaniel/claude-seo --skill seo-sitemap
Source repository · Upstream listing
Sitemap Analysis & Generation
Mode 1: Analyze Existing Sitemap
Discover candidates before reporting a sitemap missing:
The helper reads every bounded Sitemap: declaration in robots.txt, validates
cross host targets through the shared SSRF safe fetch layer, and still probes
common paths when a declared sitemap is stale or invalid. Use only entries in
found ; preserve declared failures as findings instead of treating a robots.txt
line alone as proof that a sitemap works.
Validation Checks
Valid XML format
Per file limit: ≤50,000 URLs AND ≤50MB uncompressed (whichever is hit first)
All URLs return HTTP 200
<lastmod accurate: must be a valid W3C Datetime and reflect the last
significant content change (main content, structured data, links, not
copyright/boilerplate edits). Google only honours <lastmod when consistently
and verifiably accurate, so warn when values are suspiciously uniform or newer
than the page's real content.
No deprecated tags: <priority and <changefreq are ignored by Google
Sitemap referenced in robots.txt
Compare crawled pages vs sitemap; flag missing pages
Quality Signals
Sitemap index file if 50k URLs
Split by content type (pages, posts, images, videos)
No non canonical URLs in sitemap
No noindexed URLs in sitemap
No redirected URLs in sitemap
HTTPS URLs only (no HTTP)
Common Issues
Issue Severity Fix
50k URLs in single file Critical Split with sitemap index
50MB uncompressed single file Critical Split with sitemap index
Non 200 URLs High Remove or fix broken URLs
Noindexed URLs included High Remove from sitemap
Redirected URLs included Medium Update to final URLs
All identical lastmod Low Use actual modification dates
Priority/changefreq used Info Can remove (ignored by Google)
Extension sitemaps (image / video / news)
Google documents three subtypes with their own rules, validate per subtype:
Image ( http://www.google.com/schemas/sitemap image/1.1 ): only two valid
tags remain, <image:image and <image:loc (max 1,000 <image:image
per <url ). <image:caption / <image:geo location / <image:title /
<image:license were deprecated (2022), flag as info level removable.
Video : required <video:video with <video:thumbnail loc ,
<video:title , <video:description , plus <video:content loc or
<video:player loc ; mRSS also supported. Flag deprecated/removed tags
( <video:category , <video:gallery loc , <video:price , <video:tvshow ,
player autoplay/allow embed) as info level removable; recheck Google docs before citing a removal date.
News : max 1,000 <news:news per file (not 50,000); include only
articles from the last 2 days ; required <news:publication / <news:name /
<news:language / <news:publication date / <news:title ; submit/discover through
Search Console or robots.txt/sitemap index; use Publisher Center only for
publication management where relevant. When the news: namespace is detected, override the generic
50k check with the 1,000 cap.
Mode 2: Generate New Sitemap
Process
1. Ask for business type (or auto detect from existing site)
2. Load industry template from ../seo plan/assets/ directory
3. Interactive structure planning with user
4. Apply quality gates:
⚠️ WARNING at 30+ location pages (require 60%+ unique content)
🛑 HARD STOP at 50+ location pages (require justification)
5. Generate valid XML output
6. Split at whichever comes first: 50,000 URLs or 50MB uncompressed, with sitemap index
7. Generate STRUCTURE.md documentation
Safe Programmatic Pages (OK at scale)
✅ Integration pages (with real setup docs)
✅ Template/tool pages (with downloadable content)
✅ Glossary pages (200+ word definitions)
✅ Product pages (unique specs, reviews)
✅ User profile pages (user generated content)
Penalty Risk (avoid at scale)
❌ Location pages with only city name swapped
❌ "Best [tool] for [industry]" without industry specific value
❌ "[Competitor] alternative" without real comparison data
❌ AI generated pages without human review and unique value
Sitemap Format
Standard Sitemap
Sitemap Index (for 50k URLs)
Error Handling
URL unreachable : Report the HTTP status code and suggest checking if the site is live
No sitemap found : Run sitemap discovery.py and report "not found" only
when its found list is empty after declared and common candidates are checked
Invalid XML format : Report specific parsing errors with line numbers
Rate limiting detected : Back off and report partial results with a note about retry timing
Output
For Analysis
VALIDATION REPORT.md : analysis results
Issues list with severity
Recommendations
For Generation
sitemap.xml (or split files with index)
STRUCTURE.md : site architecture documentation
URL count and organization summary