The TECHNICAL BOOK's index under the mount — docs/book/, the same generated site.
Spelled here for the reason every other documentation URL is: one definition of the prefix,
one place to change the day the tree moves (surface-interaction-conventions.md Amendment
2026-09-07). docs/book/ does not exist yet — the companion site's /book route renders the
site's own empty state for a section with no pages, and never a placeholder chapter
(2026-09-17-companion-site.md §4).
The TECHNICAL BOOK's index under the mount —
docs/book/, the same generated site.Spelled here for the reason every other documentation URL is: one definition of the prefix, one place to change the day the tree moves (
surface-interaction-conventions.mdAmendment 2026-09-07).docs/book/does not exist yet — the companion site's/bookroute renders the site's own empty state for a section with no pages, and never a placeholder chapter (2026-09-17-companion-site.md§4).