New Twiddle

components.category-browser.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  router: Ember.inject.service()
});

controllers.categories.category.js

import Ember from 'ember';

export default Ember.Controller.extend({
});

controllers.categories.js

import Ember from 'ember';

export default Ember.Controller.extend({
  categoryController: Ember.inject.controller('categories.category'),
  categoryModel: Ember.computed.reads('categoryController.model')
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('categories', function () {
    this.route('category', {path: ':category_id'} );
  });
});

export default Router;

routes.categories.category.js

import Ember from 'ember';

export default Ember.Route.extend({
  model (params) {
    return params.category_id;
  }
});

routes.categories.js

import Ember from 'ember';

export default Ember.Route.extend({

});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<h3>Current Route: <span style="font-family:monospace">{{router._router.currentRouteName}}</span></h3>
{{#link-to 'categories'}}Categories{{/link-to}}

{{outlet}}
<br>

<br>

templates.categories.hbs

<h3>Categories Page</h3>
{{categoryController}}
{{category-browser category=categoryModel}} 

templates.components.category-browser.hbs

<h3>Category Browser</h3>

{{#link-to 'categories.category' 2}}Category 2{{/link-to}}

<h4>Current Model: {{category}}</h4>

twiddle.json

{
  "version": "0.13.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}