diff --git a/packages/runtime/container-runtime/src/containerRuntime.ts b/packages/runtime/container-runtime/src/containerRuntime.ts
index 0d848b1ff86c..7052bee24fcc 100644
--- a/packages/runtime/container-runtime/src/containerRuntime.ts
+++ b/packages/runtime/container-runtime/src/containerRuntime.ts
@@ -89,6 +89,7 @@ import type {
 	IInboundSignalMessage,
 	IRuntimeMessagesContent,
 	ISummarizerNodeWithGC,
+	IFluidParentContext,
 } from "@fluidframework/runtime-definitions/internal";
 import {
 	FlushMode,
@@ -166,6 +167,7 @@ import {
 	IGarbageCollector,
 	gcGenerationOptionName,
 	type GarbageCollectionMessage,
+	type IGarbageCollectionRuntime,
 } from "./gc/index.js";
 import { InboundBatchAggregator } from "./inboundBatchAggregator.js";
 import { RuntimeCompatDetails, validateLoaderCompatibility } from "./layerCompatState.js";
@@ -712,8 +714,10 @@ export class ContainerRuntime
 	implements
 		IContainerRuntime,
 		IRuntime,
+		IGarbageCollectionRuntime,
 		ISummarizerRuntime,
 		ISummarizerInternalsProvider,
+		IFluidParentContext,
 		IProvideFluidHandleContext,
 		IProvideLayerCompatDetails
 {
diff --git a/packages/runtime/container-runtime/src/gc/gcDefinitions.ts b/packages/runtime/container-runtime/src/gc/gcDefinitions.ts
index d879867728e1..a4ffa5e31976 100644
--- a/packages/runtime/container-runtime/src/gc/gcDefinitions.ts
+++ b/packages/runtime/container-runtime/src/gc/gcDefinitions.ts
@@ -333,6 +333,8 @@ export type GarbageCollectionMessage = ISweepMessage | ITombstoneLoadedMessage;
 
 /**
  * Defines the APIs for the runtime object to be passed to the garbage collector.
+ *
+ * @internal
  */
 export interface IGarbageCollectionRuntime {
 	/**
diff --git a/packages/runtime/container-runtime/src/index.ts b/packages/runtime/container-runtime/src/index.ts
index d0cd6c0062c8..3fefbc186935 100644
--- a/packages/runtime/container-runtime/src/index.ts
+++ b/packages/runtime/container-runtime/src/index.ts
@@ -36,6 +36,7 @@ export {
 	IGCMetadata,
 	GCFeatureMatrix,
 	GCVersion,
+	IGarbageCollectionRuntime,
 	IGCRuntimeOptions,
 	IMarkPhaseStats,
 	ISweepPhaseStats,