XML sitemap audit — find and fix the sitemap problems that quietly waste crawl budget and slow indexing. Discovers the sitemap (robots.txt, /sitemap.xml, sitemap index), validates structure and size limits, and cross-checks the URLs it lists against reality: non-200 / redirected / noindex / canonicalized-away URLs that shouldn't be in a sitemap, plus indexable pages that are missing from it. Reviews lastmod accuracy, sitemap-index organization, and robots.txt reference.
SkillScore100Maintained
Automatic
◆Marketing & Content pack
Last verified 8/17/2026
What it changes
Passed 23 of 23 test cases with the skill, and 22 of 23 without it.
Without skill96%
With skill100%
Checks it passed that the model alone missed
Checks for pages blocked by robots.txt directives.
1 fixed22 passed either way0 still failing0 broke
Pass-rate lift
+4 pp
Tokens
+3%
Agent turns
0%
Response time
+9%
Measured 8/17/2026v2 · latest is v323 of 23 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
This benchmark measured an earlier version of the skill.
A newer attempt on gemini-3.8-flash on 10/20/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.
See it in action
A test case the skill fixed. Same model, same prompt, with and without the skill.
Prompt
Could you run a full audit on my website's primary XML sitemap at https://example.com/sitemap.xml? I need a detailed report showing any HTTP error codes, redirected endpoints, and orphan URLs, along with a summary of overall sitemap health.
What was checked, without and with the skill
Checked
Without skill
With skill
Categorizes URLs by HTTP status codes.
Passed
Passed
Identifies non-canonical URLs listed in the sitemap.
Passed
Passed
Checks for pages blocked by robots.txt directives.
Missed
Passed
case-01 · gemini-3.6-flash · 8/17/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md3 linessingle file
Canonical NotFair workflow
Read ../../seo/sitemap-audit/WORKFLOW.md completely, then follow it as the active workflow. Resolve every relative reference from that file against ../../seo/sitemap-audit/.