breaking another cycle

Author: ef4

packages/@ember/-internals/glimmer/lib/components/link-to.ts

@@ -2,8 +2,8 @@ import type Route from '@ember/routing/route';
 import type { RouterState, RoutingService } from '@ember/routing/-internals';
 import { isSimpleClick } from '@ember/-internals/views';
 import { assert, debugFreeze, inspect, warn } from '@ember/debug';
-import { getEngineParent } from '@ember/engine';
-import EngineInstance from '@ember/engine/instance';
+import { getEngineParent } from '@ember/engine/parent';
+import type EngineInstance from '@ember/engine/instance';
 import { flaggedInstrument } from '@ember/instrumentation';
 import { action } from '@ember/object';
 import { service } from '@ember/service';
@@ -494,13 +494,13 @@ class _LinkTo extends InternalComponent {
   }
 
   private get isEngine(): boolean {
-    let owner = this.owner;
-    return owner instanceof EngineInstance && getEngineParent(owner) !== undefined;
+    let owner = this.owner as EngineInstance;
+    return getEngineParent(owner) !== undefined;
   }
 
   private get engineMountPoint(): string | undefined {
-    let owner = this.owner;
-    return owner instanceof EngineInstance ? owner.mountPoint : undefined;
+    let owner = this.owner as EngineInstance;
+    return owner.mountPoint;
   }
 
   private classFor(state: 'active' | 'loading' | 'disabled'): string {

packages/@ember/engine/index.ts

@@ -1,4 +1,4 @@
-export { getEngineParent, setEngineParent } from './lib/engine-parent';
+export { getEngineParent, setEngineParent } from './parent';
 
 import { canInvoke } from '@ember/-internals/utils';
 import Controller from '@ember/controller';

packages/@ember/engine/instance.ts

@@ -7,7 +7,7 @@ import { RSVP } from '@ember/-internals/runtime';
 import { assert } from '@ember/debug';
 import { Registry, privatize as P } from '@ember/-internals/container';
 import { guidFor } from '@ember/-internals/utils';
-import { ENGINE_PARENT, getEngineParent, setEngineParent } from './lib/engine-parent';
+import { ENGINE_PARENT, getEngineParent, setEngineParent } from './parent';
 import { ContainerProxyMixin, RegistryProxyMixin } from '@ember/-internals/runtime';
 import type { InternalOwner } from '@ember/-internals/owner';
 import type Owner from '@ember/-internals/owner';

packages/@ember/engine/package.json

@@ -4,7 +4,8 @@
   "type": "module",
   "exports": {
     ".": "./index.ts",
-    "./instance": "./instance.ts"
+    "./instance": "./instance.ts",
+    "./parent": "./parent.ts"
   },
   "dependencies": {
     "@ember/-internals": "workspace:*",

packages/@ember/engine/lib/engine-parent.ts renamed to packages/@ember/engine/parent.ts

@@ -1,7 +1,7 @@
 /**
 @module @ember/engine
 */
-import type EngineInstance from '../instance';
+import type EngineInstance from './instance';
 
 export const ENGINE_PARENT = Symbol('ENGINE_PARENT');