Crawlability and site structure for SEO: robots.txt, noindex, canonical, redirect chains, sitemap.xml; internal linking, click depth, orphan pages, URL hierarchy, breadcrumbs; competitor comparison (gaps, overlapping keywords, content gaps). Commands documented in commands/. Triggers: 'seo crawl', 'crawlability', 'robots txt', 'site structure', 'URL structure', 'competitor seo', 'индексация', 'структура сайта', 'конкуренты seo', 'краулинг'.
