The sitemap discovery gap investigation revealed five distinct HTML format variants used across 11,672 articles that the original extraction regex failed to capture. The fix required changes to the data-article-id regex from digits-only to any characters handling h3 tags both with and without anchor tags adding div.article-date and div.article-meta extractors and changing the condition logic from requiring both title and meta to working with title alone plus fallback. The result was 1,649 previously invisible articles becoming searchable.