Demo

components.child-component\.js

import Component from '@ember/component';
import {action} from '@ember/object';

export default class extends Component {
  @action
  change() {
  	this.set("name", "Dux");
  }
}

components.glim-component\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';
import { computed, set } from '@ember/object';

export default class extends Component {
  static keys = ["a1"]

  @computed("args.name")
  get niceName() {
  	return this.args.name;
  }
  @action
  change() {
    console.log(this.args.name);
    set(this.args, "name", "runspired");
  }
}

components.reg-component\.js

import Component from '@ember/component';

export default class extends Component {
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

helpers.cache-helper\.js

import { helper } from '@ember/component/helper';

let cache = new WeakMap();

function getState(key1, key2) {
  let firstCache;
  
	if (cache.has(key1)) {
	  firstCache = cache.get(key1);
  } else {
  	firstCache = {};
    cache.set(key1, firstCache);
  }
  

	if (firstCache[key2]) {
		return firstCache[key2];
  } else {
  	let obj = {};

  	firstCache[key2] = obj;
	  
    return obj;
  }
}


export default helper(function cacheHelper(params/*, hash*/) {
  return getState(...params);
});

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
{{child-component name=name}}

{{reg-component name=name}}

<GlimComponent @name={{name}}/>
<br>
<br>

templates.components.child-component\.hbs

<a {{action "change"}}> Click me to change the value(child) :{{name}}</a>

templates.components.glim-component\.hbs

<div>---- Glimer start ----</div>
{{child-component name=@name}}

<a {{action "change"}}> Click me to change the value(glim) :{{@name}}</a>

{{log args.cacheFor}}

{{#let (cache-helper this @name) as |cache|}}
	{{cache.name}}
  
  <Input @value={{cache.name}} />
{{/let}}

<div>---- Glimer start ----</div>

templates.components.reg-component\.hbs

{{child-component name=name}}

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}