Crate lumen_core 

Lumen UI framework core crate.

• Owns the tick loop, command queue, ECS components, and the two ECS worlds (main + render). See render_world for the cross-world flow.
• Backend traits are marker types; concrete backends register systems via app::Plugin.
• Hierarchy uses bevy_ecs::hierarchy::ChildOf and bevy_ecs::hierarchy::Children, re-exported from prelude.

Modules

app

App builder and Plugin trait. Wraps [bevy_ecs::World] and Schedule directly without depending on bevy_app.

command

Bounded command queue for off-main-thread mutations of ECS state.

components

ECS component primitives.

i18n

Process-wide translation hook - the one surface a script host reaches translation through.

input

Pointer, keyboard, drag, IME, and file-drop event types plus shared input resources.

introspect

Typed, whitelisted component-introspection registry for the dynamic DOM n.components() / n.component("LayoutBox") reads (design 4.7).

nav

File-based-pages navigation primitive - the ONE surface every embedding reaches through.

net_capture

Process-wide, opt-in HTTP capture sink for dev tooling.

node

Node handles and the per-tick DOM index for the dynamic query API.

node_ir

Retained Node IR - typed scene-graph tree produced from the flat Extracted* bag.

palette

Design-token / named-color Palette.

prelude

Crate prelude re-exporting the common types. Glob-import with use lumen_core::prelude::*;.

property_store

Typed reactive property store with notify-on-write semantics.

render_world

Render world definitions and the extract pipeline.

signals

Reactive named-value store backing bind-text="..." markup attributes and <for each="..."> iteration.

text_events

W3.2: text-editing message bus.

text_model

W3.1: rope-backed text model components.

tick

Main-world tick stages and the Tick resource.

traits

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

window_state

Process-global window-state mirror for the window script namespace.