helm publishes the library as a spine and a file of columns per group, so the row a screen reads is assembled here: art, figures, paperwork and combat, joined to the spine by position with the build digest on both ends checked. Four of the seven, because quirks and the loadout are nothing this filters on yet. A prefix written before the split carries the columns on the spine and has no side documents, and is read exactly as it always was. The site and the index are deployed separately, so a page that only worked against one of the two layouts would be broken for as long as that took. The curve loader now goes through the same reader rather than its own copy of the fetch and the two checks.