What problem does it solve? Broken, oversized, or misconfigured XML sitemaps silently hurt search engine indexing, and manually auditing thousands of URLs against Google's rules is error-prone. This Skill validates existing sitemaps or generates new ones from industry templates with built-in quality gates. ## Core Features & Use Cases - Sitemap Analysis: Discovers sitemaps via robots.txt declarations and common-path probing, then validates XML format, URL status codes, lastmod accuracy, and the 50,000 URL / 50MB limits. - Extension Sitemap Validation: Checks image, video, and news sitemap subtypes against their specific rules, including the 1,000-entry cap for news sitemaps. - Guided Generation: Builds new sitemaps from industry templates with quality gates that warn at 30+ location pages and hard-stop at 50+ to prevent thin-content penalties. - Use Case: An SEO specialist suspects a client's sitemap is incomplete. They run the analysis mode, which discovers the declared sitemap, flags 200 redirected URLs and a single file exceeding 50,000 URLs, and outputs a VALIDATION-REPORT.md with severity-ranked fixes. ## Quick Start Analyze the XML sitemap for https://example.com and report any validation issues with severity levels.