diff --git a/packages/react-native/React/Base/RCTUtils.mm b/packages/react-native/React/Base/RCTUtils.mm
index 04f4e4ed3911..21ddfb6ff1f2 100644
--- a/packages/react-native/React/Base/RCTUtils.mm
+++ b/packages/react-native/React/Base/RCTUtils.mm
@@ -13,6 +13,7 @@
 #import <objc/runtime.h>
 #import <zlib.h>
 #import <atomic>
+#import <cmath>
 #import <vector>
 
 #import <UIKit/UIKit.h>
@@ -437,20 +438,20 @@ CGSize RCTSwitchSize(void)
 CGFloat RCTRoundPixelValue(CGFloat value)
 {
   CGFloat scale = RCTScreenScale();
-  return round(value * scale) / scale;
+  return std::round(value * scale) / scale;
 }
 
 CGFloat RCTCeilPixelValue(CGFloat value)
 {
   CGFloat scale = RCTScreenScale();
-  return ceil(value * scale) / scale;
+  return std::ceil(value * scale) / scale;
 }
 
 CGSize RCTSizeInPixels(CGSize pointSize, CGFloat scale)
 {
   return (CGSize){
-      ceil(pointSize.width * scale),
-      ceil(pointSize.height * scale),
+      std::ceil(pointSize.width * scale),
+      std::ceil(pointSize.height * scale),
   };
 }
 
diff --git a/packages/react-native/ReactCommon/React-Fabric.podspec b/packages/react-native/ReactCommon/React-Fabric.podspec
index 8b84f704eef5..81971b33ae6b 100644
--- a/packages/react-native/ReactCommon/React-Fabric.podspec
+++ b/packages/react-native/ReactCommon/React-Fabric.podspec
@@ -77,6 +77,9 @@ Pod::Spec.new do |s|
   end
 
   s.subspec "attributedstring" do |ss|
+    ss.dependency             "React-Fabric/coreUmbrella"
+    ss.dependency             "React-Fabric/components/viewUmbrella"
+    ss.dependency             "React-renderercss"
     ss.source_files         = podspec_sources("react/renderer/attributedstring/**/*.{m,mm,cpp,h}", "react/renderer/attributedstring/**/*.{h}")
     ss.exclude_files        = "react/renderer/attributedstring/tests"
     ss.header_dir           = "react/renderer/attributedstring"
@@ -209,6 +212,7 @@ Pod::Spec.new do |s|
   end
 
   s.subspec "mounting" do |ss|
+    ss.dependency             "React-Fabric/coreUmbrella"
     ss.dependency             "React-jsinspectortracing"
     ss.source_files         = podspec_sources("react/renderer/mounting/**/*.{m,mm,cpp,h}", "react/renderer/mounting/**/*.h")
     ss.exclude_files        = "react/renderer/mounting/tests"
diff --git a/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedString.h b/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedString.h
index f1cdbe4181cb..4913f3583704 100644
--- a/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedString.h
+++ b/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedString.h
@@ -9,11 +9,10 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
+#include <React/RendererCore.h>
+#include <React/Utils.h>
 #include <react/renderer/attributedstring/TextAttributes.h>
-#include <react/renderer/core/Sealable.h>
-#include <react/renderer/debug/DebugStringConvertible.h>
 #include <react/renderer/mounting/ShadowView.h>
-#include <react/utils/hash_combine.h>
 
 namespace facebook::react {
 
diff --git a/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedStringBox.h b/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedStringBox.h
index 4c9471bde5cf..077bf846c34d 100644
--- a/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedStringBox.h
+++ b/packages/react-native/ReactCommon/react/renderer/attributedstring/AttributedStringBox.h
@@ -11,6 +11,7 @@
 
 #include <memory>
 
+#include <React/Debug.h>
 #include <react/renderer/attributedstring/AttributedString.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/attributedstring/ParagraphAttributes.h b/packages/react-native/ReactCommon/react/renderer/attributedstring/ParagraphAttributes.h
index 7cd8252d7c8f..f9385bebe811 100644
--- a/packages/react-native/ReactCommon/react/renderer/attributedstring/ParagraphAttributes.h
+++ b/packages/react-native/ReactCommon/react/renderer/attributedstring/ParagraphAttributes.h
@@ -11,10 +11,10 @@
 
 #include <limits>
 
+#include <React/Graphics.h>
+#include <React/RendererCore.h>
+#include <React/Utils.h>
 #include <react/renderer/attributedstring/primitives.h>
-#include <react/renderer/debug/DebugStringConvertible.h>
-#include <react/renderer/graphics/Float.h>
-#include <react/utils/hash_combine.h>
 
 namespace facebook::react {
 
diff --git a/packages/react-native/ReactCommon/react/renderer/attributedstring/TextAttributes.h b/packages/react-native/ReactCommon/react/renderer/attributedstring/TextAttributes.h
index bcf902f9093a..9f9fdb02b824 100644
--- a/packages/react-native/ReactCommon/react/renderer/attributedstring/TextAttributes.h
+++ b/packages/react-native/ReactCommon/react/renderer/attributedstring/TextAttributes.h
@@ -14,16 +14,12 @@
 #include <optional>
 #include <vector>
 
+#include <React/Graphics.h>
+#include <React/RendererCore.h>
+#include <React/Utils.h>
+#include <React/View.h>
 #include <folly/dynamic.h>
 #include <react/renderer/attributedstring/primitives.h>
-#include <react/renderer/components/view/AccessibilityPrimitives.h>
-#include <react/renderer/core/LayoutPrimitives.h>
-#include <react/renderer/core/ReactPrimitives.h>
-#include <react/renderer/debug/DebugStringConvertible.h>
-#include <react/renderer/graphics/Color.h>
-#include <react/renderer/graphics/Float.h>
-#include <react/renderer/graphics/Size.h>
-#include <react/utils/hash_combine.h>
 
 namespace facebook::react {
 
diff --git a/packages/react-native/ReactCommon/react/renderer/attributedstring/conversions.h b/packages/react-native/ReactCommon/react/renderer/attributedstring/conversions.h
index e77b21d33653..bdc5258a8664 100644
--- a/packages/react-native/ReactCommon/react/renderer/attributedstring/conversions.h
+++ b/packages/react-native/ReactCommon/react/renderer/attributedstring/conversions.h
@@ -9,28 +9,20 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/debug/react_native_expect.h>
-#include <react/featureflags/ReactNativeFeatureFlags.h>
+#include <React/CSS.h>
+#include <React/Debug.h>
+#include <React/FeatureFlags.h>
+#include <React/RendererCore.h>
+#include <React/View.h>
 #include <react/renderer/attributedstring/AttributedString.h>
 #include <react/renderer/attributedstring/ParagraphAttributes.h>
 #include <react/renderer/attributedstring/TextAttributes.h>
-#include <react/renderer/attributedstring/conversions.h>
 #include <react/renderer/attributedstring/primitives.h>
-#include <react/renderer/components/view/accessibilityPropsConversions.h>
-#include <react/renderer/core/LayoutableShadowNode.h>
-#include <react/renderer/core/PropsParserContext.h>
-#include <react/renderer/core/ShadowNode.h>
-#include <react/renderer/core/conversions.h>
-#include <react/renderer/core/graphicsConversions.h>
-#include <react/renderer/core/propsConversions.h>
-#include <react/renderer/css/CSSFontVariant.h>
-#include <react/renderer/css/CSSValueParser.h>
 #include <unordered_map>
 
 #ifdef RN_SERIALIZABLE_STATE
+#include <React/MapBuffer.h>
 #include <folly/json.h>
-#include <react/renderer/mapbuffer/MapBuffer.h>
-#include <react/renderer/mapbuffer/MapBufferBuilder.h>
 #endif
 
 #include <glog/logging.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/graphics/platform/ios/react/renderer/graphics/HostPlatformColor.mm b/packages/react-native/ReactCommon/react/renderer/graphics/platform/ios/react/renderer/graphics/HostPlatformColor.mm
index e47deaa95cf6..1fc1a37068bf 100644
--- a/packages/react-native/ReactCommon/react/renderer/graphics/platform/ios/react/renderer/graphics/HostPlatformColor.mm
+++ b/packages/react-native/ReactCommon/react/renderer/graphics/platform/ios/react/renderer/graphics/HostPlatformColor.mm
@@ -12,6 +12,7 @@
 #import <objc/runtime.h>
 #import <react/renderer/graphics/RCTPlatformColorUtils.h>
 #import <react/utils/ManagedObjectWrapper.h>
+#import <cmath>
 #import <string>
 
 using namespace facebook::react;
@@ -86,9 +87,10 @@ bool UIColorIsP3ColorSpace(const std::shared_ptr<void> &uiColor)
 int32_t ColorFromColorComponents(const facebook::react::ColorComponents &components)
 {
   float ratio = 255;
-  auto color = ((int32_t)round((float)components.alpha * ratio) & 0xff) << 24 |
-      ((int)round((float)components.red * ratio) & 0xff) << 16 |
-      ((int)round((float)components.green * ratio) & 0xff) << 8 | ((int)round((float)components.blue * ratio) & 0xff);
+  auto color = ((int32_t)std::round((float)components.alpha * ratio) & 0xff) << 24 |
+      ((int)std::round((float)components.red * ratio) & 0xff) << 16 |
+      ((int)std::round((float)components.green * ratio) & 0xff) << 8 |
+      ((int)std::round((float)components.blue * ratio) & 0xff);
   return color;
 }
 
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/Differentiator.h b/packages/react-native/ReactCommon/react/renderer/mounting/Differentiator.h
index e0ecb4cfca52..8ba9f99c64d0 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/Differentiator.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/Differentiator.h
@@ -9,7 +9,7 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/core/ShadowNode.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/ShadowViewMutation.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/MountingCoordinator.h b/packages/react-native/ReactCommon/react/renderer/mounting/MountingCoordinator.h
index 561a74b8292b..c520508cb06b 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/MountingCoordinator.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/MountingCoordinator.h
@@ -13,7 +13,7 @@
 #include <condition_variable>
 #include <optional>
 
-#include <react/renderer/debug/flags.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/Differentiator.h>
 #include <react/renderer/mounting/MountingOverrideDelegate.h>
 #include <react/renderer/mounting/MountingTransaction.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h
index 4eeb85abceea..457f9a56e3a2 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.h
@@ -13,14 +13,12 @@
 #include <mutex>
 #include <shared_mutex>
 
+#include <React/RendererCore.h>
+#include <React/Utils.h>
 #include <react/renderer/components/root/RootShadowNode.h>
-#include <react/renderer/core/LayoutConstraints.h>
-#include <react/renderer/core/ReactPrimitives.h>
-#include <react/renderer/core/ShadowNode.h>
 #include <react/renderer/mounting/MountingCoordinator.h>
 #include <react/renderer/mounting/ShadowTreeDelegate.h>
 #include <react/renderer/mounting/ShadowTreeRevision.h>
-#include <react/utils/ContextContainer.h>
 #include "MountingOverrideDelegate.h"
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTreeRegistry.h b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTreeRegistry.h
index bfe843ebf8f4..d65974423565 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTreeRegistry.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowTreeRegistry.h
@@ -12,7 +12,7 @@
 #include <shared_mutex>
 #include <unordered_map>
 
-#include <react/renderer/core/ReactPrimitives.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/ShadowTree.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowView.h b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowView.h
index e9a51fdf8363..e0dd7d4afc3a 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/ShadowView.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/ShadowView.h
@@ -9,13 +9,8 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/core/EventEmitter.h>
-#include <react/renderer/core/LayoutMetrics.h>
-#include <react/renderer/core/Props.h>
-#include <react/renderer/core/ReactPrimitives.h>
-#include <react/renderer/core/ShadowNode.h>
-#include <react/renderer/debug/flags.h>
-#include <react/utils/hash_combine.h>
+#include <React/RendererCore.h>
+#include <React/Utils.h>
 
 namespace facebook::react {
 
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/internal/CullingContext.h b/packages/react-native/ReactCommon/react/renderer/mounting/internal/CullingContext.h
index 1057b7ab5384..30cc5f4792b1 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/internal/CullingContext.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/internal/CullingContext.h
@@ -9,8 +9,7 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/graphics/Rect.h>
-#include <react/renderer/graphics/Transform.h>
+#include <React/Graphics.h>
 
 namespace facebook::react {
 
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/internal/ShadowViewNodePair.h b/packages/react-native/ReactCommon/react/renderer/mounting/internal/ShadowViewNodePair.h
index 899deb527034..a5904bb32f8d 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/internal/ShadowViewNodePair.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/internal/ShadowViewNodePair.h
@@ -9,8 +9,8 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/core/ShadowNode.h>
-#include <react/renderer/graphics/Point.h>
+#include <React/Graphics.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/ShadowView.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/stubs/StubView.h b/packages/react-native/ReactCommon/react/renderer/mounting/stubs/StubView.h
index ffd166a0b0dc..c6507521e5ec 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/stubs/StubView.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/stubs/StubView.h
@@ -12,9 +12,7 @@
 #include <memory>
 #include <vector>
 
-#include <react/renderer/core/LayoutMetrics.h>
-#include <react/renderer/core/State.h>
-#include <react/renderer/debug/debugStringConvertibleUtils.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/ShadowView.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/stubs/stubs.h b/packages/react-native/ReactCommon/react/renderer/mounting/stubs/stubs.h
index cd5199c03b34..3948aa4eefcd 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/stubs/stubs.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/stubs/stubs.h
@@ -9,7 +9,7 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/core/ShadowNode.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/stubs/StubView.h>
 #include <react/renderer/mounting/stubs/StubViewTree.h>
 
diff --git a/packages/react-native/ReactCommon/react/renderer/mounting/updateMountedFlag.h b/packages/react-native/ReactCommon/react/renderer/mounting/updateMountedFlag.h
index 0f8f8b968758..4ce08d2288a3 100644
--- a/packages/react-native/ReactCommon/react/renderer/mounting/updateMountedFlag.h
+++ b/packages/react-native/ReactCommon/react/renderer/mounting/updateMountedFlag.h
@@ -9,7 +9,7 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
-#include <react/renderer/core/ShadowNode.h>
+#include <React/RendererCore.h>
 #include <react/renderer/mounting/ShadowTree.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm b/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm
index af5b225e8e7e..3e5bfd528320 100644
--- a/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm
+++ b/packages/react-native/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm
@@ -8,6 +8,7 @@
 #import "RCTTextLayoutManager.h"
 
 #import <array>
+#import <cmath>
 
 #import "RCTAttributedTextUtils.h"
 
@@ -186,8 +187,8 @@ - (void)drawAttributedString:(AttributedString)attributedString
                     // remains visible at small sizes and proportionate at
                     // large ones. ~`fontSize / 12` plus a 1.5pt floor.
                     CGFloat thickness = MAX(fontSize / 12.0f, 1.5f);
-                    CGFloat wavyWavelength = 1.0f + 2.0f * round(2.0f * thickness + 0.5f);
-                    CGFloat wavyCpDistance = 0.5f + round(3.0f * thickness + 0.5f);
+                    CGFloat wavyWavelength = 1.0f + 2.0f * std::round(2.0f * thickness + 0.5f);
+                    CGFloat wavyCpDistance = 0.5f + std::round(3.0f * thickness + 0.5f);
 
                     NSRange targetGlyphRange = [layoutManager glyphRangeForCharacterRange:attrRange
                                                                      actualCharacterRange:nullptr];