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Native-Obsidian structure: a page WITH children now lives at its folder-note <name>/<name>.md (LostPaul Folder Notes convention) with its children alongside; a leaf stays <name>.md. Folder-notes claim their canonical path before a same-named child, so the child (a leaf) is the one disambiguated, never the folder-note — a folder X/ always contains its own note X. Format-agnostic and safe in isolation: only the destination PATH changes, the file content/serialization is untouched, so an existing parent relocates via the move-by-id path (no delete). The frontmatter format flip (pull+push) is next. 6 new layout unit tests (leaf / parent / nested / child-named-as-parent / twin-parents / childless). 611 engine tests green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>