Pinned Page
A leaf page in the demo/ folder that carries order: -1 in its frontmatter (ARCH-004).
Siblings normally sort folders first, then by name, so this file would sit below the advanced/ folder. The negative order pins it above every unnumbered sibling — without having to renumber any of them, since anything without an order is 0.
yaml
---
order: -1
---The same attribute works on a folder, through its explorer.json (which wins) or its index.md frontmatter — the advanced-2 folder in this tree uses { "order": 1 } to sit below its file sibling.
Its localized explorer label comes from this page's title map, like every other page in the tree.
See the frontmatter reference for the exact rules.