2026-09-09 — Valentus v2 + Facto

The docs hub playbook now pins the Valentus UI bundle to the rolling v2 line and adopts Facto essentials: Lunr search, Kroki diagrams, page-context metadata, page-edit, and build-stack footer attribution.

Site branding is a thin supplemental layer (linx-brand.css, logo pair via site.keys) instead of a forked Default UI header. Folder URLs use urls.html_extension_style: indexify. STEM/KaTeX comes from the Valentus v2 bundle.