Module traits 

Marker traits identifying backend roles, plus the Bindable trait declaring a component as a property-bus participant.

Concrete backends register systems via a crate::app::Plugin into the appropriate crate::tick::TickStage; the marker traits provide a type-level identifier only.

Traits

A11yBackend

Marker trait implemented by accessibility bridges. Plugins register systems into crate::tick::TickStage::A11ySync.

Bindable

Declares that a Component participates in the entity-property bus exposed by crate::property_store::PropertyStore.

LayoutEngine

Marker trait implemented by layout engines. Plugins register systems into crate::tick::TickStage::LayoutSync.

Renderer

Marker trait implemented by render backends. The accompanying plugin installs the backend as a (possibly NonSend) render-world resource and registers systems into crate::render_world::RenderStage.

Spawn

Marker trait implemented by async-task runtimes.

Timer

Marker trait implemented by one-shot timer runtimes.

WindowBackend

Marker trait implemented by window backends. Plugins register systems into crate::tick::TickStage::Input.