diff --git a/React/Fabric/RCTFabricUIManager.h b/React/Fabric/RCTFabricUIManager.h
index 2228d1029..a1e5b5ed7 100644
--- a/React/Fabric/RCTFabricUIManager.h
+++ b/React/Fabric/RCTFabricUIManager.h
@@ -10,8 +10,35 @@
 #import <UIKit/UIKit.h>
 
 #import <React/RCTBridge.h>
-#import <React/RCTBridgeModule.h>
+#import <React/RCTInvalidating.h>
+#import <React/RCTShadowView.h>
 
-@interface RCTFabricUIManager : NSObject<RCTBridgeModule>
+@class RCTShadowView;
+
+/**
+ * The RCTFabricUIManager is the module responsible for updating the view hierarchy.
+ */
+@interface RCTFabricUIManager : NSObject <RCTInvalidating>
+
+- (RCTShadowView *)createNode:(nonnull NSNumber *)reactTag
+                      viewName:(NSString *)viewName
+                      rootTag:(nonnull NSNumber *)rootTag
+                        props:(NSDictionary *)props
+                instanceHandle:(void *)instanceHandle;
+
+- (RCTShadowView *)cloneNode:(RCTShadowView *)node;
+- (RCTShadowView *)cloneNodeWithNewChildren:(RCTShadowView *)node;
+- (RCTShadowView *)cloneNodeWithNewProps:(RCTShadowView *)node
+                                newProps:(NSDictionary *)props;
+- (RCTShadowView *)cloneNodeWithNewChildrenAndProps:(RCTShadowView *)node
+                                            newProps:(NSDictionary *)props;
+- (void)appendChild:(RCTShadowView *)parentNode
+          childNode:(RCTShadowView *)childNode;
+
+- (NSMutableArray<RCTShadowView *> *)createChildSet:(nonnull NSNumber *)rootTag;
+- (void)appendChildToSet:(NSMutableArray<RCTShadowView *> *)childSet
+               childNode:(RCTShadowView *)childNode;
+- (void)completeRoot:(nonnull NSNumber *)rootTag
+            childSet:(NSArray<RCTShadowView *> *)childSet;
 
 @end
diff --git a/React/Fabric/RCTFabricUIManager.mm b/React/Fabric/RCTFabricUIManager.mm
index e140aa60c..d8a754b06 100644
--- a/React/Fabric/RCTFabricUIManager.mm
+++ b/React/Fabric/RCTFabricUIManager.mm
@@ -12,55 +12,63 @@
 // This file contains experimental placeholders, nothing is finalized.
 @implementation RCTFabricUIManager
 
-@synthesize bridge = _bridge;
-
-RCT_EXPORT_MODULE()
-
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, createNode:(int)reactTag
-                                                  viewName:(NSString *)viewName
-                                                   rootTag:(int)rootTag
-                                                     props:(NSDictionary *)props
-                                            instanceHandle:(int)instanceHandleID)
+- (void)dealloc
 {
-  return @0;
 }
 
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNode:(int)nodeID)
+- (void)invalidate
 {
-  return @0;
 }
 
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewChildren:(int)nodeID)
+- (RCTShadowView *)createNode:(nonnull NSNumber *)reactTag
+                      viewName:(NSString *)viewName
+                      rootTag:(nonnull NSNumber *)rootTag
+                        props:(NSDictionary *)props
+                instanceHandle:(void *)instanceHandle
 {
-  return @0;
+  return nil;
 }
 
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewProps:(int)nodeID newProps:(NSDictionary *)newProps)
+- (RCTShadowView *)cloneNode:(RCTShadowView *)node
 {
-  return @0;
+  return nil;
+}
+- (RCTShadowView *)cloneNodeWithNewChildren:(RCTShadowView *)node
+{
+  return nil;
 }
 
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, cloneNodeWithNewChildrenAndProps:(int)nodeID newProps:(NSDictionary *)newProps)
+- (RCTShadowView *)cloneNodeWithNewProps:(RCTShadowView *)node
+                                newProps:(NSDictionary *)props
 {
-  return @0;
+  return nil;
 }
-
-RCT_EXPORT_METHOD(appendChild:(int)parentNodeID child:(int)childNodeID)
+- (RCTShadowView *)cloneNodeWithNewChildrenAndProps:(RCTShadowView *)node
+                                            newProps:(NSDictionary *)props
+{
+  return nil;
+}
+- (void)appendChild:(RCTShadowView *)parentNode
+          childNode:(RCTShadowView *)childNode
 {
 
 }
 
-RCT_EXPORT_SYNCHRONOUS_TYPED_METHOD(NSNumber *, createChildSet)
+- (NSMutableArray<RCTShadowView *> *)createChildSet:(nonnull NSNumber *)rootTag
 {
-  return @0;
+  return [NSMutableArray array];
 }
 
-RCT_EXPORT_METHOD(appendChildToSet:(int)childSetID child:(int)childNodeID)
+- (void)appendChildToSet:(NSMutableArray<RCTShadowView *> *)childSet
+               childNode:(RCTShadowView *)childNode
 {
+  [childSet addObject:childNode];
 }
 
-RCT_EXPORT_METHOD(completeRoot:(int)rootTag childSet:(int)childSetID)
+- (void)completeRoot:(nonnull NSNumber *)rootTag
+            childSet:(NSArray<RCTShadowView *> *)childSet
 {
+
 }
 
 @end