diff --git a/tests/domain/interaction-links.validation.test.ts b/tests/domain/interaction-links.validation.test.ts
index d7e69f47..a9a1392e 100644
--- a/tests/domain/interaction-links.validation.test.ts
+++ b/tests/domain/interaction-links.validation.test.ts
@@ -3,8 +3,14 @@ import { describe, expect, it } from "vitest";
 import { createBoxBrush } from "../../src/document/brushes";
 import { createEmptySceneDocument } from "../../src/document/scene-document";
 import { validateSceneDocument } from "../../src/document/scene-document-validation";
+import { createModelInstance } from "../../src/assets/model-instances";
+import { createProjectAssetStorageKey, type ModelAssetRecord } from "../../src/assets/project-assets";
 import { createInteractableEntity, createPlayerStartEntity, createTeleportTargetEntity, createTriggerVolumeEntity } from "../../src/entities/entity-instances";
-import { createTeleportPlayerInteractionLink, createToggleVisibilityInteractionLink } from "../../src/interactions/interaction-links";
+import {
+  createPlayAnimationInteractionLink,
+  createTeleportPlayerInteractionLink,
+  createToggleVisibilityInteractionLink
+} from "../../src/interactions/interaction-links";
 
 describe("interaction link validation", () => {
   it("accepts valid Trigger Volume and Interactable links", () => {
@@ -125,4 +131,67 @@ describe("interaction link validation", () => {
       ])
     );
   });
+
+  it("detects playAnimation links that reference a missing clip on the target model asset", () => {
+    const modelAsset = {
+      id: "asset-model-animated",
+      kind: "model",
+      sourceName: "animated.glb",
+      mimeType: "model/gltf-binary",
+      storageKey: createProjectAssetStorageKey("asset-model-animated"),
+      byteLength: 1024,
+      metadata: {
+        kind: "model" as const,
+        format: "glb" as const,
+        sceneName: null,
+        nodeCount: 1,
+        meshCount: 1,
+        materialNames: [],
+        textureNames: [],
+        animationNames: ["Idle", "Run"],
+        boundingBox: null,
+        warnings: []
+      }
+    } satisfies ModelAssetRecord;
+    const modelInstance = createModelInstance({
+      id: "model-instance-animated",
+      assetId: modelAsset.id
+    });
+    const triggerVolume = createTriggerVolumeEntity({
+      id: "entity-trigger-main"
+    });
+
+    const document = {
+      ...createEmptySceneDocument(),
+      assets: {
+        [modelAsset.id]: modelAsset
+      },
+      modelInstances: {
+        [modelInstance.id]: modelInstance
+      },
+      entities: {
+        [triggerVolume.id]: triggerVolume
+      },
+      interactionLinks: {
+        "link-play-missing-clip": createPlayAnimationInteractionLink({
+          id: "link-play-missing-clip",
+          sourceEntityId: triggerVolume.id,
+          trigger: "enter",
+          targetModelInstanceId: modelInstance.id,
+          clipName: "Walk"
+        })
+      }
+    };
+
+    const validation = validateSceneDocument(document);
+
+    expect(validation.errors).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          code: "missing-play-animation-clip",
+          path: "interactionLinks.link-play-missing-clip.action.clipName"
+        })
+      ])
+    );
+  });
 });
diff --git a/tests/domain/runtime-interaction-system.test.ts b/tests/domain/runtime-interaction-system.test.ts
index 9f3a4879..1b00da7c 100644
--- a/tests/domain/runtime-interaction-system.test.ts
+++ b/tests/domain/runtime-interaction-system.test.ts
@@ -1,6 +1,11 @@
 import { describe, expect, it } from "vitest";
 
-import { createTeleportPlayerInteractionLink, createToggleVisibilityInteractionLink } from "../../src/interactions/interaction-links";
+import {
+  createPlayAnimationInteractionLink,
+  createTeleportPlayerInteractionLink,
+  createToggleVisibilityInteractionLink,
+  createStopAnimationInteractionLink
+} from "../../src/interactions/interaction-links";
 import { RuntimeInteractionSystem } from "../../src/runtime-three/runtime-interaction-system";
 import type { RuntimeSceneDefinition } from "../../src/runtime-three/runtime-scene-build";
 
@@ -28,6 +33,10 @@ function createRuntimeSceneFixture(): RuntimeSceneDefinition {
     brushes: [],
     colliders: [],
     sceneBounds: null,
+    localLights: {
+      pointLights: [],
+      spotLights: []
+    },
     modelInstances: [],
     entities: {
       playerStarts: [],
@@ -155,6 +164,49 @@ describe("RuntimeInteractionSystem", () => {
     expect(dispatches).toEqual(["link-teleport:entity-teleport-main:8"]);
   });
 
+  it("dispatches animation actions with the authored target model instance and clip", () => {
+    const runtimeScene = createRuntimeSceneFixture();
+    runtimeScene.interactionLinks = [
+      createPlayAnimationInteractionLink({
+        id: "link-play-animation",
+        sourceEntityId: "entity-interactable-console",
+        trigger: "click",
+        targetModelInstanceId: "model-instance-animated",
+        clipName: "Walk",
+        loop: false
+      }),
+      createStopAnimationInteractionLink({
+        id: "link-stop-animation",
+        sourceEntityId: "entity-interactable-console",
+        trigger: "click",
+        targetModelInstanceId: "model-instance-animated"
+      })
+    ];
+
+    const interactionSystem = new RuntimeInteractionSystem();
+    const dispatches: string[] = [];
+
+    interactionSystem.dispatchClickInteraction("entity-interactable-console", runtimeScene, {
+      teleportPlayer: () => {
+        throw new Error("Teleport should not dispatch in this fixture.");
+      },
+      toggleBrushVisibility: () => {
+        throw new Error("Visibility should not dispatch in this fixture.");
+      },
+      playAnimation: (instanceId, clipName, loop, link) => {
+        dispatches.push(`${link.id}:${instanceId}:${clipName}:${loop === false ? "once" : "loop"}`);
+      },
+      stopAnimation: (instanceId, link) => {
+        dispatches.push(`${link.id}:${instanceId}`);
+      }
+    });
+
+    expect(dispatches).toEqual([
+      "link-play-animation:model-instance-animated:Walk:once",
+      "link-stop-animation:model-instance-animated"
+    ]);
+  });
+
   it("dispatches visibility actions only when exiting an occupied Trigger Volume", () => {
     const runtimeScene = createRuntimeSceneFixture();
     runtimeScene.interactionLinks = [
diff --git a/tests/serialization/scene-document-json.test.ts b/tests/serialization/scene-document-json.test.ts
index 16f78f6c..7ad5c231 100644
--- a/tests/serialization/scene-document-json.test.ts
+++ b/tests/serialization/scene-document-json.test.ts
@@ -180,7 +180,8 @@ describe("scene document JSON", () => {
     };
     document.world.background = {
       mode: "image",
-      assetId: imageAsset.id
+      assetId: imageAsset.id,
+      environmentIntensity: 0.75
     };
 
     expect(parseSceneDocumentJson(serializeSceneDocument(document))).toEqual(document);
@@ -630,7 +631,8 @@ describe("scene document JSON", () => {
     expect(migratedDocument.version).toBe(SCENE_DOCUMENT_VERSION);
     expect(migratedDocument.world.background).toEqual({
       mode: "image",
-      assetId: imageAsset.id
+      assetId: imageAsset.id,
+      environmentIntensity: 0.5
     });
     expect(migratedDocument.entities[pointLight.id]).toEqual(pointLight);
     expect(migratedDocument.entities[spotLight.id]).toEqual(spotLight);
@@ -792,7 +794,7 @@ describe("scene document JSON", () => {
         boundingBox: null,
         warnings: []
       }
-    };
+    } satisfies ModelAssetRecord;
 
     const migratedDocument = migrateSceneDocument({
       version: 11,