How to listen parent component value change in child component ember octane?

This is my code

parent.hbs
 
 <ChildComp
   @value=
 />


parent.js
export class ParentComponet extends Component {
  @tracked this.changes = [1,2,3]
  
  @action addChanges() {
     this.changes = [...this.changes, this.changes.length]
  }
}

child-comp.js
export class ChildComponet extends Component {
   // I wanted to observe this.args.changes updated
   // Based on that I need to call some operation
   get operation() {
      let parent = this.args.values.map((obj) {
            if (obj.parent !== null) {
             set(obj, 'goal', null);
             set(obj, 'newSubGoal', null);
            }
    });
   }
}

I wanted to observe this.args.changes in my child compoent. How can I do that in ember-octane way?