Agent skill
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".
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/antigravity-seo-sitemap
SKILL.md
Sitemap Analysis & Generation
When to Use
- Use when analyzing an existing XML sitemap or generating a new one.
- Use when the user mentions sitemap issues, sitemap generation, or sitemap validation.
- Use when checking URL coverage, sitemap limits, and sitemap quality rules.
Mode 1: Analyze Existing Sitemap
Validation Checks
- Valid XML format
- URL count <50,000 per file (protocol limit)
- All URLs return HTTP 200
<lastmod>dates are accurate (not all identical)- 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 |
| 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) |
Mode 2: Generate New Sitemap
Process
- Ask for business type (or auto-detect from existing site)
- Load industry template from
../seo-plan/assets/directory - Interactive structure planning with user
- Apply quality gates:
- ⚠️ WARNING at 30+ location pages (require 60%+ unique content)
- 🛑 HARD STOP at 50+ location pages (require justification)
- Generate valid XML output
- Split at 50k URLs with sitemap index
- 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
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>https://example.com/page</loc>
<lastmod>2026-02-07</lastmod>
</url>
</urlset>
Sitemap Index (for >50k URLs)
<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap>
<loc>https://example.com/sitemap-pages.xml</loc>
<lastmod>2026-02-07</lastmod>
</sitemap>
<sitemap>
<loc>https://example.com/sitemap-posts.xml</loc>
<lastmod>2026-02-07</lastmod>
</sitemap>
</sitemapindex>
Error Handling
- URL unreachable: Report the HTTP status code and suggest checking if the site is live
- No sitemap found: Check common locations (/sitemap.xml, /sitemap_index.xml, robots.txt reference) before reporting "not found"
- 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
Recommended Agent Skills
Expand your agent's capabilities with these related and highly-rated skills.
agent-ops-spec
Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.
agent-ops-state
Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.
agent-ops-spec
Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.
agent-ops-testing
Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.
agent-ops-testing
Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.
agent-ops-state
Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.
Didn't find tool you were looking for?