## skeleton (`poetry_skeleton`)

A pulsing placeholder shown while content loads.

Class: Poetry::Ui::Skeleton::Component - BEM block `poetry-ui-skeleton`.
- PART `skeleton` - The pulsing placeholder box itself - sized entirely by utility classes
- RULE: Skeleton is a loading placeholder - size it with classes (h-4 w-32); it has no content of its own.
- RULE: Mark the live region that will replace it (aria-busy on the container), not the skeleton.