diff --git a/tests/domain/runtime-control-foundation.test.ts b/tests/domain/runtime-control-foundation.test.ts
new file mode 100644
index 00000000..7609e8e4
--- /dev/null
+++ b/tests/domain/runtime-control-foundation.test.ts
@@ -0,0 +1,247 @@
+import { describe, expect, it } from "vitest";
+
+import { createModelInstance } from "../../src/assets/model-instances";
+import {
+  createProjectAssetStorageKey,
+  type AudioAssetRecord,
+  type ModelAssetRecord
+} from "../../src/assets/project-assets";
+import {
+  createInteractableEntity,
+  createPointLightEntity,
+  createSoundEmitterEntity,
+  createTriggerVolumeEntity
+} from "../../src/entities/entity-instances";
+import {
+  createLightControlTargetRef,
+  createSetLightEnabledControlEffect
+} from "../../src/controls/control-surface";
+import { createEmptySceneDocument } from "../../src/document/scene-document";
+import {
+  createControlInteractionLink
+} from "../../src/interactions/interaction-links";
+import { RuntimeInteractionSystem } from "../../src/runtime-three/runtime-interaction-system";
+import { buildRuntimeSceneFromDocument } from "../../src/runtime-three/runtime-scene-build";
+
+describe("runtime control foundation", () => {
+  it("builds a typed control surface for light, interaction, sound, and model targets", () => {
+    const pointLight = createPointLightEntity({
+      id: "entity-point-light-main",
+      visible: false,
+      intensity: 2.5
+    });
+    const interactable = createInteractableEntity({
+      id: "entity-interactable-console",
+      interactionEnabled: false
+    });
+    const soundEmitter = createSoundEmitterEntity({
+      id: "entity-sound-main",
+      audioAssetId: "asset-audio-main"
+    });
+    const triggerVolume = createTriggerVolumeEntity({
+      id: "entity-trigger-main"
+    });
+    const modelAsset = {
+      id: "asset-model-animated",
+      kind: "model" as const,
+      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"],
+        boundingBox: null,
+        warnings: []
+      }
+    } satisfies ModelAssetRecord;
+    const audioAsset = {
+      id: "asset-audio-main",
+      kind: "audio" as const,
+      sourceName: "loop.ogg",
+      mimeType: "audio/ogg",
+      storageKey: createProjectAssetStorageKey("asset-audio-main"),
+      byteLength: 2048,
+      metadata: {
+        kind: "audio" as const,
+        durationSeconds: 2,
+        channelCount: 2,
+        sampleRateHz: 48000,
+        warnings: []
+      }
+    } satisfies AudioAssetRecord;
+    const modelInstance = createModelInstance({
+      id: "model-instance-animated",
+      assetId: modelAsset.id
+    });
+
+    const runtimeScene = buildRuntimeSceneFromDocument({
+      ...createEmptySceneDocument(),
+      assets: {
+        [modelAsset.id]: modelAsset,
+        [audioAsset.id]: audioAsset
+      },
+      modelInstances: {
+        [modelInstance.id]: modelInstance
+      },
+      entities: {
+        [pointLight.id]: pointLight,
+        [interactable.id]: interactable,
+        [soundEmitter.id]: soundEmitter,
+        [triggerVolume.id]: triggerVolume
+      }
+    });
+
+    expect(runtimeScene.control.targets).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          target: {
+            kind: "entity",
+            entityKind: "pointLight",
+            entityId: pointLight.id
+          },
+          capabilities: ["lightEnabled", "lightIntensity"]
+        }),
+        expect.objectContaining({
+          target: {
+            kind: "interaction",
+            interactionKind: "interactable",
+            entityId: interactable.id
+          },
+          capabilities: ["interactionAvailability"]
+        }),
+        expect.objectContaining({
+          target: {
+            kind: "entity",
+            entityKind: "soundEmitter",
+            entityId: soundEmitter.id
+          },
+          capabilities: ["soundPlayback"]
+        }),
+        expect.objectContaining({
+          target: {
+            kind: "modelInstance",
+            modelInstanceId: modelInstance.id
+          },
+          capabilities: ["animationPlayback"]
+        })
+      ])
+    );
+    expect(runtimeScene.control.channels).toEqual([
+      {
+        channel: "light.intensity",
+        target: {
+          kind: "entity",
+          entityKind: "pointLight",
+          entityId: pointLight.id
+        },
+        minValue: 0,
+        defaultValue: 2.5
+      }
+    ]);
+    expect(runtimeScene.control.resolved.discrete).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          type: "lightEnabled",
+          target: {
+            kind: "entity",
+            entityKind: "pointLight",
+            entityId: pointLight.id
+          },
+          value: false
+        }),
+        expect.objectContaining({
+          type: "interactionEnabled",
+          target: {
+            kind: "interaction",
+            interactionKind: "interactable",
+            entityId: interactable.id
+          },
+          value: false
+        })
+      ])
+    );
+    expect(runtimeScene.control.resolved.channels).toEqual([
+      expect.objectContaining({
+        type: "lightIntensity",
+        descriptor: expect.objectContaining({
+          channel: "light.intensity",
+          target: {
+            kind: "entity",
+            entityKind: "pointLight",
+            entityId: pointLight.id
+          }
+        }),
+        value: 2.5
+      })
+    ]);
+  });
+
+  it("dispatches authored control effects through the interaction system", () => {
+    const triggerVolume = createTriggerVolumeEntity({
+      id: "entity-trigger-main"
+    });
+    const pointLight = createPointLightEntity({
+      id: "entity-point-light-main"
+    });
+    const lightOffEffect = createSetLightEnabledControlEffect({
+      target: createLightControlTargetRef("pointLight", pointLight.id),
+      enabled: false
+    });
+    const runtimeScene = buildRuntimeSceneFromDocument({
+      ...createEmptySceneDocument(),
+      entities: {
+        [triggerVolume.id]: triggerVolume,
+        [pointLight.id]: pointLight
+      },
+      interactionLinks: {
+        "link-light-off": createControlInteractionLink({
+          id: "link-light-off",
+          sourceEntityId: triggerVolume.id,
+          trigger: "enter",
+          effect: lightOffEffect
+        })
+      }
+    });
+    const interactionSystem = new RuntimeInteractionSystem();
+    const dispatches: Array<{ type: string; enabled: boolean }> = [];
+
+    interactionSystem.updatePlayerPosition(
+      {
+        x: 0,
+        y: 0,
+        z: 0
+      },
+      runtimeScene,
+      {
+        teleportPlayer: () => {},
+        activateSceneExit: () => {},
+        toggleBrushVisibility: () => {},
+        playAnimation: () => {},
+        stopAnimation: () => {},
+        playSound: () => {},
+        stopSound: () => {},
+        dispatchControlEffect: (effect, link) => {
+          dispatches.push({
+            type: `${link.id}:${effect.type}`,
+            enabled:
+              effect.type === "setLightEnabled" ? effect.enabled : true
+          });
+        }
+      }
+    );
+
+    expect(dispatches).toEqual([
+      {
+        type: "link-light-off:setLightEnabled",
+        enabled: false
+      }
+    ]);
+  });
+});