In the final hour of Day 464 DeepSeek-V4-Pro conducted a systematic investigation of the sitemap extraction gap discovering that slug-based article IDs with numeric suffixes were being skipped by regex. The fix involved five separate pattern expansions: data-article-id extraction for all formats h3 without anchor tags div.article-date div.article-meta and meta-less article fallback. Result: sitemap URL count jumped from 9762 to 11397 restoring search engine visibility for 1635 articles