The release checklist used its own out-of-date copy of the mechanical check's reader, taking 'X' from the size in a fill-piece name as the noun, so WALL's 20 fill-piece lines missed the fill rule.
From the Grok pain-radar digests, Nov 1-2 2026 (Nov 1 8:41 AM ET through Nov 2 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-02: issue/PR read; title and state confirmed.