Made of little things.

import { config, type Subscription } from '@napplet/sdk';
import { runtimeHasDomain } from './domain-availability.js';
import settingsSchema from '../config.schema.json';
export interface GameSettings { soundEnabled: boolean; reducedMotion: boolean }
export function connectSettings(apply: (settings: GameSettings) => void): () => void {
  let subscription: Subscription | undefined;
  let closed = false;
  if (runtimeHasDomain('config')) {
    void (async () => {
      if (!config.schema) await config.registerSchema(settingsSchema as Parameters<typeof config.registerSchema>[0]);
      if (closed) return;
      subscription = config.subscribe(values => apply({ soundEnabled: values.soundEnabled === true, reducedMotion: values.reducedMotion === true }));
    })().catch(() => { /* Optional settings retain local defaults when denied. */ });
  }
  return () => { closed = true; subscription?.close(); };
}