Bevy 0.19 — Router

Read this first when working on a Bevy project. All current implementation sibling skills assume Bevy 0.19 (released 2026-06-19); historical migration skills deliberately describe their source versions. If the user's Cargo.toml pins a different version, stop and confirm before applying current patterns from this collection.

Smallest valid app

use bevy::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}