Summary

Per-product llms.txt files previously included section index pages whose only content is a <DirectoryListing /> component — pages that exist purely as sidebar navigation containers. These pages have no standalone value for an LLM (the llms.txt file itself already serves as a directory), and they were failing the content-start-position audit check because 100% of their rendered content is navigation links.

This adds an isDirectoryOnlyPage() helper that strips imports, component tags, and JSX comments from a page's raw MDX body, then returns true if the page contains a <DirectoryListing /> with ≤ 250 characters of surrounding prose. Any page matching that condition is excluded from the per-product llms.txt filter in getStaticPaths.

• ~415 pure directory index pages are removed from per-product llms.txt outputs
• Pages with real prose alongside <DirectoryListing /> (>250 chars) are preserved
• Pages that don't use <DirectoryListing /> at all are unaffected
• No build time impact — operates on e.body already loaded in memory by getCollection
• The global /llms.txt (product directory) is unchanged