Tells a site's stylesheet which components its documentation's text draws, which icons it names and which classes it writes, through the runtime:compile:content_components hook MishkaCmsCore.Runtime.Compilers.TailwindCompiler.content_components/1 fires while it builds a site's stylesheet: the names the site's approved pages and notes list in content_components, the icon classes they list in content_icons and the classes they list in content_classes, which MishkaDocument.Resources.Changes.ContentFacts stores when either is written. The kit's doc-section, which draws both with rich_content, then reaches those components (MishkaCmsCore.Runtime.Compilers.CssClosure), the stylesheet carries a rule for each icon, and it is built with each class.

Read as the system, as the sitemap reads them (MishkaDocument.Plugins.SitemapUrls): a page locked to some readers draws its components, icons and classes for them, so it counts. Only the rows that name a component, an icon or a class are read, and only those columns.

And the block only the bar under the header draws, doc-switcher (MishkaDocument.Plugins.PageFrame): no page or layout names it, so nothing else would bring its classes into the stylesheet. Registered in MishkaDocument.Application.