diff --git a/React/CoreModules/BUCK b/React/CoreModules/BUCK
index 5658870246..22ead8b155 100644
--- a/React/CoreModules/BUCK
+++ b/React/CoreModules/BUCK
@@ -1,5 +1,9 @@
 load("@fbsource//tools/build_defs/apple:flag_defs.bzl", "OBJC_ARC_PREPROCESSOR_FLAGS", "get_debug_preprocessor_flags", "get_fbobjc_enable_exception_lang_compiler_flags_DEPRECATED")
-load("//tools/build_defs/oss:rn_defs.bzl", "rn_debug_flags", "rn_apple_library", "subdir_glob")
+load("@fbsource//tools/build_defs/oss:rn_defs.bzl", "rn_apple_library", "rn_debug_flags", "subdir_glob")
+load(
+    "@fbsource//xplat/configurations/buck/apple/plugins/sad_xplat_hosted_configurations:react_module_registration.bzl",
+    "react_module_plugin_providers",
+)
 
 rn_apple_library(
     name = "CoreModulesApple",
@@ -9,11 +13,49 @@ rn_apple_library(
             "**/*.mm",
         ],
     ),
-    headers = glob(
-        [
-            "**/*.h",
-        ],
+    headers = ["CoreModulesPlugins.h"],
+    compiler_flags = [
+        "-Wno-error=unguarded-availability-new",
+        "-Wno-unknown-warning-option",
+    ],
+    contacts = ["oncall+react_native@xmail.facebook.com"],
+    exported_linker_flags = [
+        "-weak_framework",
+        "UserNotifications",
+        "-weak_framework",
+        "WebKit",
+    ],
+    exported_preprocessor_flags = rn_debug_flags(),
+    frameworks = [
+        "Foundation",
+        "UIKit",
+    ],
+    lang_compiler_flags = get_fbobjc_enable_exception_lang_compiler_flags_DEPRECATED(),
+    link_whole = True,
+    platform_preprocessor_flags = [(
+        "linux",
+        ["-D PIC_MODIFIER=@PLT"],
+    )],
+    plugins = react_module_plugin_providers(
+        name = "PlatformConstants",
+        native_class_func = "RCTPlatformCls",
     ),
+    preprocessor_flags = OBJC_ARC_PREPROCESSOR_FLAGS + get_debug_preprocessor_flags() + rn_debug_flags() + [
+        "-DRN_DISABLE_OSS_PLUGIN_HEADER",
+    ],
+    visibility = ["PUBLIC"],
+    exported_deps = [
+        "fbsource//xplat/js/react-native-github:ReactInternalApple",
+        "fbsource//xplat/js/react-native-github/Libraries/FBReactNativeSpec:FBReactNativeSpecApple",
+        ":CoreModulesAppleHeader",
+    ],
+)
+
+# Workaround: define exported headers target separately so that the header
+# namespace can be specified correctly.
+rn_apple_library(
+    name = "CoreModulesAppleHeader",
+    srcs = [],
     header_namespace = "",
     exported_headers = subdir_glob(
         [
@@ -22,6 +64,7 @@ rn_apple_library(
                 "*.h",
             ),
         ],
+        exclude = ["CoreModulesPlugins.h"],
         prefix = "React",
     ),
     compiler_flags = [
@@ -40,17 +83,17 @@ rn_apple_library(
         "Foundation",
         "UIKit",
     ],
-    labels = ["depslint_never_add"],
     lang_compiler_flags = get_fbobjc_enable_exception_lang_compiler_flags_DEPRECATED(),
     link_whole = True,
     platform_preprocessor_flags = [(
         "linux",
         ["-D PIC_MODIFIER=@PLT"],
     )],
-    preprocessor_flags = OBJC_ARC_PREPROCESSOR_FLAGS + get_debug_preprocessor_flags() + rn_debug_flags(),
+    preprocessor_flags = OBJC_ARC_PREPROCESSOR_FLAGS + get_debug_preprocessor_flags() + rn_debug_flags() + [
+        "-DRN_DISABLE_OSS_PLUGIN_HEADER",
+    ],
     visibility = ["PUBLIC"],
     exported_deps = [
         "fbsource//xplat/js/react-native-github:ReactInternalApple",
-        "fbsource//xplat/js/react-native-github/Libraries/FBReactNativeSpec:FBReactNativeSpecApple",
     ],
 )
diff --git a/React/CoreModules/CoreModulesPlugins.h b/React/CoreModules/CoreModulesPlugins.h
new file mode 100644
index 0000000000..29f2ecd51c
--- /dev/null
+++ b/React/CoreModules/CoreModulesPlugins.h
@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#ifdef RN_DISABLE_OSS_PLUGIN_HEADER
+
+// FB Internal: Plugins.h is autogenerated by the build system.
+#import "Plugins.h"
+
+#else
+
+//OSS-compatibility layer: manually define these for github.
+
+#import <Foundation/Foundation.h>
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wreturn-type-c-linkage"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// NOTE: Sync these with FB internal version.
+
+Class RCTPlatformCls(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#pragma GCC diagnostic pop
+
+#endif // RN_DISABLE_OSS_PLUGIN_HEADER
diff --git a/React/CoreModules/RCTPlatform.mm b/React/CoreModules/RCTPlatform.mm
index 34a78484bf..b28d70248c 100644
--- a/React/CoreModules/RCTPlatform.mm
+++ b/React/CoreModules/RCTPlatform.mm
@@ -5,14 +5,15 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-#import "RCTPlatform.h"
-
 #import <UIKit/UIKit.h>
 
 #import <FBReactNativeSpec/FBReactNativeSpec.h>
+#import <React/RCTPlatform.h>
 #import <React/RCTUtils.h>
 #import <React/RCTVersion.h>
 
+#import "CoreModulesPlugins.h"
+
 using namespace facebook::react;
 
 static NSString *interfaceIdiom(UIUserInterfaceIdiom idiom) {
@@ -68,3 +69,7 @@ RCT_EXPORT_MODULE(PlatformConstants)
 }
 
 @end
+
+Class RCTPlatformCls(void) {
+  return RCTPlatform.class;
+}
diff --git a/tools/build_defs/oss/rn_defs.bzl b/tools/build_defs/oss/rn_defs.bzl
index 0257c93b36..bf22dd5a24 100644
--- a/tools/build_defs/oss/rn_defs.bzl
+++ b/tools/build_defs/oss/rn_defs.bzl
@@ -331,3 +331,8 @@ def jni_instrumentation_test_lib(**_kwargs):
 def fb_xplat_cxx_test(**_kwargs):
     """A noop stub for OSS build."""
     pass
+
+# iOS Plugin support.
+def react_module_plugin_providers():
+    # Noop for now
+    return []