2026-09-26 - Software stack nest + Overview peers :: Business Bootstrap

IA: Capability categories (Email, Scheduling, Design, Vault, Chat, Org infra, Funding) nest under Software stack as linked parents (Business Bootstrap > Software stack > Email > …). Categories no longer sit on the component root (avoids reading "BB > Email" as bootstrap email).
Overview: Component start-page nav stays a sibling Overview leaf. Category landings are the linked parent titles (Email, …), not nested Overview wrappers.
Typology: Hub excludes /business-bootstrap/ from Diataxis URL path heuristics (tree folders are hierarchy). Leaf icons, when wanted, use explicit :page-nav-typology: (see nav-typology README) — not /how-to|tutorials|…/ URL markers.
History: BB grew its own Diataxis-shaped tree; articles were not lifted from General Knowledge (GK overlap is xrefs/altitude).