Fix CQS signal readability-isolate-declaration in xplat/js/react-native-github/packages

Reviewed By: javache Differential Revision: D82197859
ensure animatedNodes collection is only accessed on render thread (#53734 )
2025-11-01 09:14:26 +00:00 · 2025-09-12 02:00:09 -07:00 · 2025-09-11 20:29:00 -07:00 · 2025-09-11 18:55:40 -07:00 · 2025-09-11 14:21:00 -07:00 · 2025-09-11 11:34:09 -07:00
183 changed files with 3006 additions and 1489 deletions
@@ -19,6 +19,7 @@ on:

 jobs:
  create_release:
+    if: github.repository == 'facebook/react-native'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
@@ -23,6 +23,7 @@ jobs:

  prepare_hermes_workspace:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    env:
      HERMES_WS_DIR: /tmp/hermes
      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
@@ -50,8 +51,8 @@ jobs:
      - name: Build HermesC Apple
        uses: ./.github/actions/build-hermesc-apple
        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.output.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.output.react-native-version }}
+          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
+          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}

  build_apple_slices_hermes:
    runs-on: macos-14
@@ -75,7 +76,7 @@ jobs:
        uses: ./.github/actions/build-apple-slices-hermes
        with:
          flavor: ${{ matrix.flavor }}
-          slice: ${{ matrix.slice}}
+          slice: ${{ matrix.slice }}
          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}

@@ -101,6 +102,7 @@ jobs:
          flavor: ${{ matrix.flavor }}

  prebuild_apple_dependencies:
+    if: github.repository == 'facebook/react-native'
    uses: ./.github/workflows/prebuild-ios-dependencies.yml
    secrets: inherit

@@ -145,6 +147,7 @@ jobs:

  build_android:
    runs-on: 8-core-ubuntu
+    if: github.repository == 'facebook/react-native'
    needs: [set_release_type]
    container:
      image: reactnativecommunity/react-native-android:latest
@@ -9,6 +9,7 @@ on:
 jobs:
  publish_bumped_packages:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    env:
      GHA_NPM_TOKEN: ${{ secrets.GHA_NPM_TOKEN }}
    steps:
@@ -21,6 +21,7 @@ jobs:

  prepare_hermes_workspace:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    env:
      HERMES_WS_DIR: /tmp/hermes
      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
@@ -98,6 +99,7 @@ jobs:
          flavor: ${{ matrix.flavor }}

  prebuild_apple_dependencies:
+    if: github.repository == 'facebook/react-native'
    uses: ./.github/workflows/prebuild-ios-dependencies.yml
    secrets: inherit

@@ -9,6 +9,7 @@ on:
 jobs:
    rerun:
        runs-on: ubuntu-latest
+        if: github.repository == 'facebook/react-native'
        steps:
            - name: rerun ${{ inputs.run_id }}
              env:
@@ -11,6 +11,7 @@ on:
 jobs:
  set_release_type:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    outputs:
      RELEASE_TYPE: ${{ steps.set_release_type.outputs.RELEASE_TYPE }}
    env:
@@ -34,6 +35,7 @@ jobs:

  prepare_hermes_workspace:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    env:
      HERMES_WS_DIR: /tmp/hermes
      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
@@ -112,6 +114,7 @@ jobs:
          flavor: ${{ matrix.flavor }}

  prebuild_apple_dependencies:
+    if: github.repository == 'facebook/react-native'
    uses: ./.github/workflows/prebuild-ios-dependencies.yml
    secrets: inherit

@@ -379,7 +382,8 @@ jobs:
    runs-on: 8-core-ubuntu
    needs: [set_release_type]
    container:
-      image: reactnativecommunity/react-native-android:latest
+      # Version is pinned to v18.0 to unblock `run_fantom_tests` - see https://github.com/react-native-community/docker-android/pull/242#issuecomment-3280029122
+      image: reactnativecommunity/react-native-android:v18.0
      env:
        TERM: "dumb"
        GRADLE_OPTS: "-Dorg.gradle.daemon=false"
@@ -594,6 +598,7 @@ jobs:

  test_js:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    strategy:
      fail-fast: false
      matrix:
@@ -608,6 +613,7 @@ jobs:

  lint:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    env:
      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
@@ -27,6 +27,7 @@ on:
 jobs:
  validate-dotslash-artifacts:
    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
@@ -1,5 +1,53 @@
 # Changelog

+## v0.81.2
+
+### Added
+
+#### Android specific
+
+- Create a debugOptimized buildType for Android ([5e3edafec6](https://github.com/facebook/react-native/commit/5e3edafec6c69558521061dced7a6bcd046576b0) by [@cortinico](https://github.com/cortinico))
+- Add `useNativeEqualsInNativeReadableArrayAndroid` and `useNativeTransformHelperAndroid` feature flag to the experimental channel. This should alleviate some of the perf issue users are seeing on Android + Reanimated + NewArch on 0.81([a346096da8](https://github.com/facebook/react-native/commit/a346096da81fccf5fbc82d83bfc128695e6ec3a5) by [@cortinico](https://github.com/cortinico))
+
+### Fixed
+
+#### iOS specific
+
+- Fix Node scripts related to prebuilt tarball extraction for paths containing whitespaces ([366f2ad505](https://github.com/facebook/react-native/commit/366f2ad5057ffecc1f5b211f6aae29567ae6b7e5) by [@kitten](https://github.com/kitten))
+- Use autolinking-generated react-native-config output in second step of cocoapods linking that generates artifacts and generated source ([a2eb29e5e7](https://github.com/facebook/react-native/commit/a2eb29e5e7aef8bbdf4c647c8467b5292b013b20) by [@kitten](https://github.com/kitten))
+
+## v0.82.0-rc.1
+
+### Added
+
+#### Android specific
+
+- **Hermes V1:** Added opt-in to use the new Hermes ([3e9990f860](https://github.com/facebook/react-native/commit/3e9990f860eb9380837ef431ca02def32c4261ad) by [@j-piasecki](https://github.com/j-piasecki))
+
+#### iOS specific
+
+- **Hermes V1:** Added opt-in to use the new Hermes ([e9cdc308b4](https://github.com/facebook/react-native/commit/e9cdc308b4c04753d85757e8877ac00c3c687b95) by [@j-piasecki](https://github.com/j-piasecki))
+
+### Changed
+
+- **Hermes V1:** Changed the source of hermesc binary to be an npm package ([2e0bd13a25](https://github.com/facebook/react-native/commit/2e0bd13a2533fe7ab64125a95b9215b806018c6e) by [@j-piasecki](https://github.com/j-piasecki))
+
+### Deprecated
+
+- **APIs:** Deprecate legacy javascript react native apis ([e7aeea26bd](https://github.com/facebook/react-native/commit/e7aeea26bde6e9cda0a3a0a55fc2a0421fb0c0e5) by [@RSNara](https://github.com/RSNara))
+
+### Fixed
+
+#### Android specific
+
+- **Build From Source:** Fix build from source due to missing folder error on Gradle 9.0 ([9fbce3eff1](https://github.com/facebook/react-native/commit/9fbce3eff18060f16e796badc415ba733ede19af) by [@cortinico](https://github.com/cortinico))
+
+#### iOS specific
+
+- **RCTAlertController:** Simplify RCTAlertController, don't create additional UIWindow ([05c4321b19](https://github.com/facebook/react-native/commit/05c4321b194c3d0e146b6085bcaccc75acd3fd67) by [@okwasniewski](https://github.com/okwasniewski))
+- **Prebuild:** Fix Node scripts related to prebuilt tarball extraction for paths containing whitespaces ([9731e8ebc5](https://github.com/facebook/react-native/commit/9731e8ebc5ea87526a91b9903172639e062cd920) by [@kitten](https://github.com/kitten))
+- **Prebuild:** Use autolinking-generated react-native-config output in second step of cocoapods linking that generates artifacts and generated source ([f170db412b](https://github.com/facebook/react-native/commit/f170db412b3ab46fd0894d5d66431d9c230cd3a8) by [@kitten](https://github.com/kitten))
+
 ## v0.82.0-rc.0

 ### Breaking
@@ -17,10 +17,13 @@
    <img src="https://img.shields.io/npm/v/react-native?color=brightgreen&label=npm%20package" alt="Current npm package version." />
  </a>
  <a href="https://reactnative.dev/docs/contributing">
-    <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs welcome!" />
+    <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs are welcome!" />
  </a>
  <a href="https://twitter.com/intent/follow?screen_name=reactnative">
-    <img src="https://img.shields.io/twitter/follow/reactnative.svg?label=Follow%20@reactnative" alt="Follow @reactnative" />
+    <img src="https://img.shields.io/twitter/follow/reactnative.svg?label=Follow%20@reactnative" alt="Follow @reactnative on X" />
+  </a>
+  <a href="https://bsky.app/profile/reactnative.dev">
+    <img src="https://img.shields.io/badge/Bluesky-0285FF?logo=bluesky&logoColor=fff" alt="Follow @reactnative.dev on Bluesky" />
  </a>
 </p>

@@ -135,6 +135,7 @@ if (project.findProperty("react.internal.useHermesNightly")?.toString()?.toBoole
    configurations.all {
      resolutionStrategy.dependencySubstitution {
        substitute(project(":packages:react-native:ReactAndroid:hermes-engine"))
+            // TODO: T237406039 update coordinates
            .using(module("com.facebook.react:hermes-android:0.+"))
            .because("Users opted to use hermes from nightly")
      }
@@ -100,7 +100,7 @@
    "jsonc-parser": "2.2.1",
    "markdownlint-cli2": "^0.17.2",
    "markdownlint-rule-relative-links": "^3.0.0",
-    "memfs": "^4.7.7",
+    "memfs": "^4.38.2",
    "metro-babel-register": "^0.83.1",
    "metro-transform-plugins": "^0.83.1",
    "micromatch": "^4.0.4",
@@ -1,5 +1,5 @@
-@generated SignedSource<<b6a779e724ecce5e727ee674dc20f809>>
-Git revision: e87564a24cf233c60aaebee8c418ec85724f7214
+@generated SignedSource<<0b54f75686e4893a5444839bf621a317>>
+Git revision: 5a792db1225adda206313e9bf751198a1ca7851a
 Built with --nohooks: false
 Is local checkout: false
 Remote URL: https://github.com/facebook/react-native-devtools-frontend
@@ -238,7 +238,7 @@ import"../../ui/components/icon_button/icon_button.js";import"../../ui/component
                        <td>${e.method}</td>
                        <td>${e.params?d`<code>${JSON.stringify(e.params)}</code>`:""}</td>
                        <td>
-                          ${e.result?d`<code>${JSON.stringify(e.result)}</code>`:e.error?d`<code>${JSON.stringify(e.error)}</code>`:"(pending)"}
+                          ${e.result?d`<code>${JSON.stringify(e.result)}</code>`:e.error?d`<code>${JSON.stringify(e.error)}</code>`:"id"in e?"(pending)":""}
                        </td>
                        <td data-value=${e.elapsedTime||0}>
                          ${"id"in e?e.elapsedTime?U(A.sMs,{PH1:String(e.elapsedTime)}):"(pending)":""}
@@ -55,8 +55,8 @@ class ReactPlugin : Plugin<Project> {
                project,
            )

-    if (project.rootProject.isHermesV1Enabled != rootExtension.hermesV1Enabled.get()) {
-      rootExtension.hermesV1Enabled.set(project.rootProject.isHermesV1Enabled)
+    if (project.rootProject.isHermesV1Enabled) {
+      rootExtension.hermesV1Enabled.set(true)
    }

    // App Only Configuration
@@ -71,11 +71,11 @@ class ReactPlugin : Plugin<Project> {
      project.afterEvaluate {
        val reactNativeDir = extension.reactNativeDir.get().asFile
        val propertiesFile = File(reactNativeDir, "ReactAndroid/gradle.properties")
-        val versionAndGroupStrings = readVersionAndGroupStrings(propertiesFile)
-        val hermesV1Enabled =
-            if (project.rootProject.hasProperty("hermesV1Enabled"))
-                project.rootProject.findProperty("hermesV1Enabled") == "true"
-            else false
+        val hermesVersionPropertiesFile =
+            File(reactNativeDir, "sdks/hermes-engine/version.properties")
+        val versionAndGroupStrings =
+            readVersionAndGroupStrings(propertiesFile, hermesVersionPropertiesFile)
+        val hermesV1Enabled = rootExtension.hermesV1Enabled.get()
        configureDependencies(project, versionAndGroupStrings, hermesV1Enabled)
        configureRepositories(project)
      }
@@ -14,6 +14,7 @@ import com.facebook.react.utils.KotlinStdlibCompatUtils.capitalizeCompat
 import com.facebook.react.utils.NdkConfiguratorUtils.configureJsEnginePackagingOptions
 import com.facebook.react.utils.NdkConfiguratorUtils.configureNewArchPackagingOptions
 import com.facebook.react.utils.ProjectUtils.isHermesEnabled
+import com.facebook.react.utils.ProjectUtils.isHermesV1Enabled
 import com.facebook.react.utils.ProjectUtils.useThirdPartyJSC
 import com.facebook.react.utils.detectedCliFile
 import com.facebook.react.utils.detectedEntryFile
@@ -48,6 +49,7 @@ internal fun Project.configureReactTasks(variant: Variant, config: ReactExtensio
      } else {
        isHermesEnabledInProject
      }
+  val isHermesV1Enabled = project.isHermesV1Enabled || rootProject.isHermesV1Enabled
  val isDebuggableVariant =
      config.debuggableVariants.get().any { it.equals(variant.name, ignoreCase = true) }
  val useThirdPartyJSC = project.useThirdPartyJSC
@@ -78,6 +80,7 @@ internal fun Project.configureReactTasks(variant: Variant, config: ReactExtensio
          task.jsBundleDir.set(jsBundleDir)
          task.resourcesDir.set(resourcesDir)
          task.hermesEnabled.set(isHermesEnabledInThisVariant)
+          task.hermesV1Enabled.set(isHermesV1Enabled)
          task.minifyEnabled.set(!isHermesEnabledInThisVariant)
          task.devEnabled.set(false)
          task.jsIntermediateSourceMapsDir.set(jsIntermediateSourceMapsDir)
@@ -63,6 +63,8 @@ abstract class BundleHermesCTask : DefaultTask() {

  @get:Input abstract val hermesEnabled: Property<Boolean>

+  @get:Input abstract val hermesV1Enabled: Property<Boolean>
+
  @get:Input abstract val devEnabled: Property<Boolean>

  @get:Input abstract val extraPackagerArgs: ListProperty<String>
@@ -94,12 +96,8 @@ abstract class BundleHermesCTask : DefaultTask() {
    runCommand(bundleCommand)

    if (hermesEnabled.get()) {
-      val hermesV1Enabled =
-          if (project.rootProject.hasProperty("hermesV1Enabled"))
-              project.rootProject.findProperty("hermesV1Enabled") == "true"
-          else false
      val detectedHermesCommand =
-          detectOSAwareHermesCommand(root.get().asFile, hermesCommand.get(), hermesV1Enabled)
+          detectOSAwareHermesCommand(root.get().asFile, hermesCommand.get(), hermesV1Enabled.get())
      val bytecodeFile = File("${bundleFile}.hbc")
      val outputSourceMap = resolveOutputSourceMap(bundleAssetFilename)
      val compilerSourceMap = resolveCompilerSourceMap(bundleAssetFilename)
@@ -13,7 +13,7 @@ import com.facebook.react.utils.PropertyUtils.EXCLUSIVE_ENTEPRISE_REPOSITORY
 import com.facebook.react.utils.PropertyUtils.INCLUDE_JITPACK_REPOSITORY
 import com.facebook.react.utils.PropertyUtils.INCLUDE_JITPACK_REPOSITORY_DEFAULT
 import com.facebook.react.utils.PropertyUtils.INTERNAL_HERMES_PUBLISHING_GROUP
-import com.facebook.react.utils.PropertyUtils.INTERNAL_HERMES_VERSION_NAME
+import com.facebook.react.utils.PropertyUtils.INTERNAL_HERMES_V1_VERSION_NAME
 import com.facebook.react.utils.PropertyUtils.INTERNAL_REACT_NATIVE_MAVEN_LOCAL_REPO
 import com.facebook.react.utils.PropertyUtils.INTERNAL_REACT_PUBLISHING_GROUP
 import com.facebook.react.utils.PropertyUtils.INTERNAL_USE_HERMES_NIGHTLY
@@ -31,6 +31,7 @@ internal object DependencyUtils {
  internal data class Coordinates(
      val versionString: String,
      val hermesVersionString: String,
+      val hermesV1VersionString: String,
      val reactGroupString: String = DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP,
      val hermesGroupString: String = DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP,
  )
@@ -113,7 +114,12 @@ internal object DependencyUtils {
      coordinates: Coordinates,
      hermesV1Enabled: Boolean = false,
  ) {
-    if (coordinates.versionString.isBlank() || coordinates.hermesVersionString.isBlank()) return
+    if (
+        coordinates.versionString.isBlank() ||
+            (!hermesV1Enabled && coordinates.hermesVersionString.isBlank()) ||
+            (hermesV1Enabled && coordinates.hermesV1VersionString.isBlank())
+    )
+        return
    project.rootProject.allprojects { eachProject ->
      eachProject.configurations.all { configuration ->
        // Here we set a dependencySubstitution for both react-native and hermes-engine as those
@@ -133,7 +139,11 @@ internal object DependencyUtils {
          // Contributors only: The hermes-engine version is forced only if the user has
          // not opted into using nightlies for local development.
          configuration.resolutionStrategy.force(
-              "${coordinates.reactGroupString}:hermes-android:${coordinates.versionString}"
+              // TODO: T237406039 update coordinates
+              if (hermesV1Enabled)
+                  "${coordinates.hermesGroupString}:hermes-android:${coordinates.hermesV1VersionString}"
+              else
+                  "${coordinates.reactGroupString}:hermes-android:${coordinates.hermesVersionString}"
          )
        }
      }
@@ -146,10 +156,11 @@ internal object DependencyUtils {
  ): List<Triple<String, String, String>> {
    // TODO: T231755027 update coordinates and versioning
    val dependencySubstitution = mutableListOf<Triple<String, String, String>>()
+    // TODO: T237406039 update coordinates
    val hermesVersionString =
        if (hermesV1Enabled)
-            "${coordinates.hermesGroupString}:hermes-android:${coordinates.versionString}"
-        else "${coordinates.reactGroupString}:hermes-android:${coordinates.versionString}"
+            "${coordinates.hermesGroupString}:hermes-android:${coordinates.hermesV1VersionString}"
+        else "${coordinates.reactGroupString}:hermes-android:${coordinates.hermesVersionString}"
    dependencySubstitution.add(
        Triple(
            "com.facebook.react:react-native",
@@ -172,6 +183,7 @@ internal object DependencyUtils {
              "The react-android dependency was modified to use the correct Maven group.",
          )
      )
+      // TODO: T237406039 update coordinates
      dependencySubstitution.add(
          Triple(
              "com.facebook.react:hermes-android",
@@ -183,14 +195,10 @@ internal object DependencyUtils {
    return dependencySubstitution
  }

-  fun readVersionAndGroupStrings(propertiesFile: File): Coordinates {
+  fun readVersionAndGroupStrings(propertiesFile: File, hermesVersionFile: File): Coordinates {
    val reactAndroidProperties = Properties()
    propertiesFile.inputStream().use { reactAndroidProperties.load(it) }
    val versionStringFromFile = (reactAndroidProperties[INTERNAL_VERSION_NAME] as? String).orEmpty()
-    // TODO: T231755027 update HERMES_VERSION_NAME in gradle.properties to point to the correct
-    // hermes version
-    val hermesVersionStringFromFile =
-        (reactAndroidProperties[INTERNAL_HERMES_VERSION_NAME] as? String).orEmpty()
    // If on a nightly, we need to fetch the -SNAPSHOT artifact from Sonatype.
    val versionString =
        if (versionStringFromFile.startsWith("0.0.0") || "-nightly-" in versionStringFromFile) {
@@ -205,9 +213,18 @@ internal object DependencyUtils {
    val hermesGroupString =
        reactAndroidProperties[INTERNAL_HERMES_PUBLISHING_GROUP] as? String
            ?: DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP
+    // TODO: T237406039 read both versions from the same file
+    val hermesVersionProperties = Properties()
+    hermesVersionFile.inputStream().use { hermesVersionProperties.load(it) }
+
+    val hermesVersion = versionString
+    val hermesV1Version =
+        (hermesVersionProperties[INTERNAL_HERMES_V1_VERSION_NAME] as? String).orEmpty()
+
    return Coordinates(
        versionString,
-        hermesVersionStringFromFile,
+        hermesVersion,
+        hermesV1Version,
        reactGroupString,
        hermesGroupString,
    )
@@ -153,6 +153,7 @@ internal fun detectOSAwareHermesCommand(

  // 3. If Hermes V1 is enabled, use hermes-compiler from npm, otherwise, if the
  // react-native contains a pre-built hermesc, use it.
+  // TODO: T237406039 use hermes-compiler from npm for both
  val hermesCPath = if (hermesV1Enabled) HERMES_COMPILER_NPM_DIR else HERMESC_IN_REACT_NATIVE_DIR
  val prebuiltHermesPath =
      hermesCPath
@@ -23,6 +23,7 @@ import com.facebook.react.utils.PropertyUtils.SCOPED_USE_THIRD_PARTY_JSC
 import com.facebook.react.utils.PropertyUtils.USE_THIRD_PARTY_JSC
 import org.gradle.api.Project
 import org.gradle.api.file.DirectoryProperty
+import org.jetbrains.kotlin.gradle.plugin.extraProperties

 internal object ProjectUtils {

@@ -75,7 +76,11 @@ internal object ProjectUtils {
        (project.hasProperty(HERMES_V1_ENABLED) &&
            project.property(HERMES_V1_ENABLED).toString().toBoolean()) ||
            (project.hasProperty(SCOPED_HERMES_V1_ENABLED) &&
-                project.property(SCOPED_HERMES_V1_ENABLED).toString().toBoolean())
+                project.property(SCOPED_HERMES_V1_ENABLED).toString().toBoolean()) ||
+            (project.extraProperties.has(HERMES_V1_ENABLED) &&
+                project.extraProperties.get(HERMES_V1_ENABLED).toString().toBoolean()) ||
+            (project.extraProperties.has(SCOPED_HERMES_V1_ENABLED) &&
+                project.extraProperties.get(SCOPED_HERMES_V1_ENABLED).toString().toBoolean())

  internal fun Project.needsCodegenFromPackageJson(rootProperty: DirectoryProperty): Boolean {
    val parsedPackageJson = readPackageJsonFile(this, rootProperty)
@@ -79,6 +79,10 @@ object PropertyUtils {

  /** Internal property used to control the version name of React Native */
  const val INTERNAL_VERSION_NAME = "VERSION_NAME"
-  /** Internal property used to control the version name of Hermes Engine */
-  const val INTERNAL_HERMES_VERSION_NAME = "HERMES_VERSION_NAME"
+
+  /**
+   * Internal property, shared with iOS, used to control the version name of Hermes Engine. This is
+   * stored in sdks/hermes-engine/version.properties
+   */
+  const val INTERNAL_HERMES_V1_VERSION_NAME = "HERMES_V1_VERSION_NAME"
 }
@@ -33,9 +33,9 @@ class GeneratePackageListTaskTest {
    val inputFile = tempFolder.newFile("config.json")

    val task =
-        createTestTask<GeneratePackageListTask> {
-          it.generatedOutputDirectory.set(outputFolder)
-          it.autolinkInputFile.set(inputFile)
+        createTestTask<GeneratePackageListTask> { testTask ->
+          testTask.generatedOutputDirectory.set(outputFolder)
+          testTask.autolinkInputFile.set(inputFile)
        }

    assertThat(task.inputs.files.singleFile).isEqualTo(inputFile)
@@ -82,11 +82,11 @@ class PrepareGflagsTaskTest {
    val gflagsThirdPartyPath = tempFolder.newFolder("gflagspath/jni")
    val output = tempFolder.newFolder("output")
    val task =
-        createTestTask<PrepareGflagsTask> {
-          it.gflagsPath.setFrom(gflagspath)
-          it.gflagsThirdPartyPath.set(gflagsThirdPartyPath)
-          it.gflagsVersion.set("1.0.0")
-          it.outputDir.set(output)
+        createTestTask<PrepareGflagsTask> { taskConfig ->
+          taskConfig.gflagsPath.setFrom(gflagspath)
+          taskConfig.gflagsThirdPartyPath.set(gflagsThirdPartyPath)
+          taskConfig.gflagsVersion.set("1.0.0")
+          taskConfig.outputDir.set(output)
        }
    File(gflagspath, "gflags-1.0.0/src/gflags_declare.h.in").apply {
      parentFile.mkdirs()
@@ -271,54 +271,69 @@ class DependencyUtilsTest {
        .isEqualTo(2)
  }

-  // TODO: T236767053
-
  @Test
  fun configureDependencies_withEmptyVersion_doesNothing() {
    val project = createProject()

-    configureDependencies(project, DependencyUtils.Coordinates("", ""))
+    configureDependencies(project, DependencyUtils.Coordinates("", "", ""))

    assertThat(project.configurations.first().resolutionStrategy.forcedModules.isEmpty()).isTrue()
  }

  @Test
-  fun configureDependencies_withVersionString_appliesResolutionStrategy() {
+  fun configureDependencies_withVersionString_appliesResolutionStrategy_withClassicHermes() {
    val project = createProject()

-    configureDependencies(project, DependencyUtils.Coordinates("1.2.3", "1.2.3"))
+    configureDependencies(project, DependencyUtils.Coordinates("1.2.3", "4.5.6", "7.8.9"))

    val forcedModules = project.configurations.first().resolutionStrategy.forcedModules
    assertThat(forcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
        .isTrue()
-    assertThat(forcedModules.any { it.toString() == "com.facebook.react:hermes-android:1.2.3" })
+    assertThat(forcedModules.any { it.toString() == "com.facebook.react:hermes-android:4.5.6" })
        .isTrue()
  }

  @Test
-  fun configureDependencies_withVersionString_appliesOnAllProjects() {
+  fun configureDependencies_withVersionString_appliesResolutionStrategy_withHermesV1() {
+    val project = createProject()
+
+    configureDependencies(
+        project,
+        DependencyUtils.Coordinates("1.2.3", "4.5.6", "7.8.9"),
+        hermesV1Enabled = true,
+    )
+
+    val forcedModules = project.configurations.first().resolutionStrategy.forcedModules
+    assertThat(forcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
+        .isTrue()
+    assertThat(forcedModules.any { it.toString() == "com.facebook.hermes:hermes-android:7.8.9" })
+        .isTrue()
+  }
+
+  @Test
+  fun configureDependencies_withVersionString_appliesOnAllProjects_withClassicHermes() {
    val rootProject = ProjectBuilder.builder().build()
    val appProject = ProjectBuilder.builder().withName("app").withParent(rootProject).build()
    val libProject = ProjectBuilder.builder().withName("lib").withParent(rootProject).build()
    appProject.plugins.apply("com.android.application")
    libProject.plugins.apply("com.android.library")

-    configureDependencies(appProject, DependencyUtils.Coordinates("1.2.3", "1.2.3"))
+    configureDependencies(appProject, DependencyUtils.Coordinates("1.2.3", "4.5.6", "7.8.9"))

    val appForcedModules = appProject.configurations.first().resolutionStrategy.forcedModules
    val libForcedModules = libProject.configurations.first().resolutionStrategy.forcedModules
    assertThat(appForcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
        .isTrue()
-    assertThat(appForcedModules.any { it.toString() == "com.facebook.react:hermes-android:1.2.3" })
+    assertThat(appForcedModules.any { it.toString() == "com.facebook.react:hermes-android:4.5.6" })
        .isTrue()
    assertThat(libForcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
        .isTrue()
-    assertThat(libForcedModules.any { it.toString() == "com.facebook.react:hermes-android:1.2.3" })
+    assertThat(libForcedModules.any { it.toString() == "com.facebook.react:hermes-android:4.5.6" })
        .isTrue()
  }

  @Test
-  fun configureDependencies_withVersionStringAndGroupString_appliesOnAllProjects() {
+  fun configureDependencies_withVersionString_appliesOnAllProjects_withHermesV1() {
    val rootProject = ProjectBuilder.builder().build()
    val appProject = ProjectBuilder.builder().withName("app").withParent(rootProject).build()
    val libProject = ProjectBuilder.builder().withName("lib").withParent(rootProject).build()
@@ -327,25 +342,93 @@ class DependencyUtilsTest {

    configureDependencies(
        appProject,
-        DependencyUtils.Coordinates("1.2.3", "1.2.3", "io.github.test"),
+        DependencyUtils.Coordinates("1.2.3", "4.5.6", "7.8.9"),
+        hermesV1Enabled = true,
+    )
+
+    val appForcedModules = appProject.configurations.first().resolutionStrategy.forcedModules
+    val libForcedModules = libProject.configurations.first().resolutionStrategy.forcedModules
+    assertThat(appForcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
+        .isTrue()
+    assertThat(appForcedModules.any { it.toString() == "com.facebook.hermes:hermes-android:7.8.9" })
+        .isTrue()
+    assertThat(libForcedModules.any { it.toString() == "com.facebook.react:react-android:1.2.3" })
+        .isTrue()
+    assertThat(libForcedModules.any { it.toString() == "com.facebook.hermes:hermes-android:7.8.9" })
+        .isTrue()
+  }
+
+  @Test
+  fun configureDependencies_withVersionStringAndGroupString_appliesOnAllProjects_withClassicHermes() {
+    val rootProject = ProjectBuilder.builder().build()
+    val appProject = ProjectBuilder.builder().withName("app").withParent(rootProject).build()
+    val libProject = ProjectBuilder.builder().withName("lib").withParent(rootProject).build()
+    appProject.plugins.apply("com.android.application")
+    libProject.plugins.apply("com.android.library")
+
+    configureDependencies(
+        appProject,
+        DependencyUtils.Coordinates(
+            "1.2.3",
+            "4.5.6",
+            "7.8.9",
+            "io.github.test",
+            "io.github.test.hermes",
+        ),
    )

    val appForcedModules = appProject.configurations.first().resolutionStrategy.forcedModules
    val libForcedModules = libProject.configurations.first().resolutionStrategy.forcedModules
    assertThat(appForcedModules.any { it.toString() == "io.github.test:react-android:1.2.3" })
        .isTrue()
-    assertThat(appForcedModules.any { it.toString() == "io.github.test:hermes-android:1.2.3" })
+    assertThat(appForcedModules.any { it.toString() == "io.github.test:hermes-android:4.5.6" })
        .isTrue()
    assertThat(libForcedModules.any { it.toString() == "io.github.test:react-android:1.2.3" })
        .isTrue()
-    assertThat(libForcedModules.any { it.toString() == "io.github.test:hermes-android:1.2.3" })
+    assertThat(libForcedModules.any { it.toString() == "io.github.test:hermes-android:4.5.6" })
        .isTrue()
  }

  @Test
-  fun getDependencySubstitutions_withDefaultGroup_substitutesCorrectly() {
+  fun configureDependencies_withVersionStringAndGroupString_appliesOnAllProjects_withHermesV1() {
+    val rootProject = ProjectBuilder.builder().build()
+    val appProject = ProjectBuilder.builder().withName("app").withParent(rootProject).build()
+    val libProject = ProjectBuilder.builder().withName("lib").withParent(rootProject).build()
+    appProject.plugins.apply("com.android.application")
+    libProject.plugins.apply("com.android.library")
+
+    configureDependencies(
+        appProject,
+        DependencyUtils.Coordinates(
+            "1.2.3",
+            "4.5.6",
+            "7.8.9",
+            "io.github.test",
+            "io.github.test.hermes",
+        ),
+        hermesV1Enabled = true,
+    )
+
+    val appForcedModules = appProject.configurations.first().resolutionStrategy.forcedModules
+    val libForcedModules = libProject.configurations.first().resolutionStrategy.forcedModules
+    assertThat(appForcedModules.any { it.toString() == "io.github.test:react-android:1.2.3" })
+        .isTrue()
+    assertThat(
+            appForcedModules.any { it.toString() == "io.github.test.hermes:hermes-android:7.8.9" }
+        )
+        .isTrue()
+    assertThat(libForcedModules.any { it.toString() == "io.github.test:react-android:1.2.3" })
+        .isTrue()
+    assertThat(
+            libForcedModules.any { it.toString() == "io.github.test.hermes:hermes-android:7.8.9" }
+        )
+        .isTrue()
+  }
+
+  @Test
+  fun getDependencySubstitutions_withDefaultGroup_substitutesCorrectly_withClassicHermes() {
    val dependencySubstitutions =
-        getDependencySubstitutions(DependencyUtils.Coordinates("0.42.0", "0.42.0"))
+        getDependencySubstitutions(DependencyUtils.Coordinates("0.42.0", "0.42.0", "0.43.0"))

    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
    assertThat("com.facebook.react:react-android:0.42.0")
@@ -364,10 +447,40 @@ class DependencyUtilsTest {
  }

  @Test
-  fun getDependencySubstitutions_withCustomGroup_substitutesCorrectly() {
+  fun getDependencySubstitutions_withDefaultGroup_substitutesCorrectly_withHermesV1() {
    val dependencySubstitutions =
        getDependencySubstitutions(
-            DependencyUtils.Coordinates("0.42.0", "0.42.0", "io.github.test")
+            DependencyUtils.Coordinates("0.42.0", "0.42.0", "0.43.0"),
+            hermesV1Enabled = true,
+        )
+
+    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
+    assertThat("com.facebook.react:react-android:0.42.0")
+        .isEqualTo(dependencySubstitutions[0].second)
+    assertThat(
+            "The react-native artifact was deprecated in favor of react-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[0].third)
+    assertThat("com.facebook.react:hermes-engine").isEqualTo(dependencySubstitutions[1].first)
+    assertThat("com.facebook.hermes:hermes-android:0.43.0")
+        .isEqualTo(dependencySubstitutions[1].second)
+    assertThat(
+            "The hermes-engine artifact was deprecated in favor of hermes-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[1].third)
+  }
+
+  @Test
+  fun getDependencySubstitutions_withCustomGroup_substitutesCorrectly_withClassicHermes() {
+    val dependencySubstitutions =
+        getDependencySubstitutions(
+            DependencyUtils.Coordinates(
+                "0.42.0",
+                "0.42.0",
+                "0.43.0",
+                "io.github.test",
+                "io.github.test.hermes",
+            )
        )

    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
@@ -392,6 +505,44 @@ class DependencyUtilsTest {
        .isEqualTo(dependencySubstitutions[3].third)
  }

+  @Test
+  fun getDependencySubstitutions_withCustomGroup_substitutesCorrectly_withHermesV1() {
+    val dependencySubstitutions =
+        getDependencySubstitutions(
+            DependencyUtils.Coordinates(
+                "0.42.0",
+                "0.42.0",
+                "0.43.0",
+                "io.github.test",
+                "io.github.test.hermes",
+            ),
+            hermesV1Enabled = true,
+        )
+
+    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
+    assertThat("io.github.test:react-android:0.42.0").isEqualTo(dependencySubstitutions[0].second)
+    assertThat(
+            "The react-native artifact was deprecated in favor of react-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[0].third)
+    assertThat("com.facebook.react:hermes-engine").isEqualTo(dependencySubstitutions[1].first)
+    assertThat("io.github.test.hermes:hermes-android:0.43.0")
+        .isEqualTo(dependencySubstitutions[1].second)
+    assertThat(
+            "The hermes-engine artifact was deprecated in favor of hermes-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[1].third)
+    assertThat("com.facebook.react:react-android").isEqualTo(dependencySubstitutions[2].first)
+    assertThat("io.github.test:react-android:0.42.0").isEqualTo(dependencySubstitutions[2].second)
+    assertThat("The react-android dependency was modified to use the correct Maven group.")
+        .isEqualTo(dependencySubstitutions[2].third)
+    assertThat("com.facebook.react:hermes-android").isEqualTo(dependencySubstitutions[3].first)
+    assertThat("io.github.test.hermes:hermes-android:0.43.0")
+        .isEqualTo(dependencySubstitutions[3].second)
+    assertThat("The hermes-android dependency was modified to use the correct Maven group.")
+        .isEqualTo(dependencySubstitutions[3].third)
+  }
+
  @Test
  fun readVersionString_withCorrectVersionString_returnsIt() {
    val propertiesFile =
@@ -405,9 +556,25 @@ class DependencyUtilsTest {
          )
        }

-    val versionString = readVersionAndGroupStrings(propertiesFile).versionString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        HERMES_V1_VERSION_NAME=1000.0.0
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }
+
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val versionString = strings.versionString
+    val hermesVersionString = strings.hermesVersionString
+    val hermesV1VersionString = strings.hermesV1VersionString

    assertThat(versionString).isEqualTo("1000.0.0")
+    assertThat(hermesVersionString).isEqualTo("1000.0.0")
+    assertThat(hermesV1VersionString).isEqualTo("1000.0.0")
  }

  @Test
@@ -417,15 +584,33 @@ class DependencyUtilsTest {
          writeText(
              """
        VERSION_NAME=0.0.0-20221101-2019-cfe811ab1
+        HERMES_VERSION_NAME=0.12.0-commitly-20221101-2019-cfe811ab1
+        HERMES_V1_VERSION_NAME=250829098.0.0-stable
        ANOTHER_PROPERTY=true
      """
                  .trimIndent()
          )
        }

-    val versionString = readVersionAndGroupStrings(propertiesFile).versionString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        HERMES_V1_VERSION_NAME=250829098.0.0-stable
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }
+
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val versionString = strings.versionString
+    val hermesVersionString = strings.hermesVersionString
+    val hermesV1VersionString = strings.hermesV1VersionString

    assertThat(versionString).isEqualTo("0.0.0-20221101-2019-cfe811ab1-SNAPSHOT")
+    assertThat(hermesVersionString).isEqualTo("0.0.0-20221101-2019-cfe811ab1-SNAPSHOT")
+    assertThat(hermesV1VersionString).isEqualTo("250829098.0.0-stable")
  }

  @Test
@@ -440,8 +625,23 @@ class DependencyUtilsTest {
          )
        }

-    val versionString = readVersionAndGroupStrings(propertiesFile).versionString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }
+
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val versionString = strings.versionString
+    val hermesVersionString = strings.hermesVersionString
+    val hermesV1VersionString = strings.hermesV1VersionString
    assertThat(versionString).isEqualTo("")
+    assertThat(hermesVersionString).isEqualTo("")
+    assertThat(hermesV1VersionString).isEqualTo("")
  }

  @Test
@@ -457,8 +657,24 @@ class DependencyUtilsTest {
          )
        }

-    val versionString = readVersionAndGroupStrings(propertiesFile).versionString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        HERMES_V1_VERSION_NAME=
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }
+
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val versionString = strings.versionString
+    val hermesVersionString = strings.hermesVersionString
+    val hermesV1VersionString = strings.hermesV1VersionString
    assertThat(versionString).isEqualTo("")
+    assertThat(hermesVersionString).isEqualTo("")
+    assertThat(hermesV1VersionString).isEqualTo("")
  }

  @Test
@@ -468,15 +684,30 @@ class DependencyUtilsTest {
          writeText(
              """
        react.internal.publishingGroup=io.github.test
+        react.internal.hermesPublishingGroup=io.github.test
        ANOTHER_PROPERTY=true
      """
                  .trimIndent()
          )
        }

-    val groupString = readVersionAndGroupStrings(propertiesFile).reactGroupString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        HERMES_V1_VERSION_NAME=
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }

-    assertThat(groupString).isEqualTo("io.github.test")
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val reactGroupString = strings.reactGroupString
+    val hermesGroupString = strings.hermesGroupString
+
+    assertThat(reactGroupString).isEqualTo("io.github.test")
+    assertThat(hermesGroupString).isEqualTo("io.github.test")
  }

  @Test
@@ -491,9 +722,23 @@ class DependencyUtilsTest {
          )
        }

-    val groupString = readVersionAndGroupStrings(propertiesFile).reactGroupString
+    val hermesVersionFile =
+        tempFolder.newFile("version.properties").apply {
+          writeText(
+              """
+        HERMES_V1_VERSION_NAME=
+        ANOTHER_PROPERTY=true
+      """
+                  .trimIndent()
+          )
+        }

-    assertThat(groupString).isEqualTo("com.facebook.react")
+    val strings = readVersionAndGroupStrings(propertiesFile, hermesVersionFile)
+    val reactGroupString = strings.reactGroupString
+    val hermesGroupString = strings.hermesGroupString
+
+    assertThat(reactGroupString).isEqualTo("com.facebook.react")
+    assertThat(hermesGroupString).isEqualTo("com.facebook.hermes")
  }

  @Test
@@ -166,7 +166,7 @@ class PathUtilsTest {
  @WithOs(OS.MAC)
  fun detectOSAwareHermesCommand_withHermesV1Enabled() {
    tempFolder.newFolder("node_modules/hermes-compiler/osx-bin/")
-    val expected = tempFolder.newFile("node_modules/hermes-compiler/osx-bin//hermesc")
+    val expected = tempFolder.newFile("node_modules/hermes-compiler/osx-bin/hermesc")

    assertThat(detectOSAwareHermesCommand(tempFolder.root, "", hermesV1Enabled = true))
        .isEqualTo(expected.toString())
@@ -25,14 +25,14 @@ class OsRule : TestRule {
      override fun evaluate() {
        val annotation = description.annotations.filterIsInstance<WithOs>().firstOrNull()

-        annotation?.os?.propertyName?.let {
+        annotation?.os?.propertyName?.let { osName ->
          retainOs = System.getProperty(OS_NAME_KEY)
-          System.setProperty(OS_NAME_KEY, it)
+          System.setProperty(OS_NAME_KEY, osName)
        }
-        annotation?.arch?.let {
-          if (it.isNotBlank()) {
+        annotation?.arch?.let { arch ->
+          if (arch.isNotBlank()) {
            retainArch = System.getProperty(OS_ARCH_KEY)
-            System.setProperty(OS_ARCH_KEY, it)
+            System.setProperty(OS_ARCH_KEY, arch)
          }
        }
        try {
@@ -5,8 +5,6 @@
 * LICENSE file in the root directory of this source tree.
 */

-#import <React/RCTBridgeDelegate.h>
-#import <React/RCTConvert.h>
 #import <UIKit/UIKit.h>
 #import "RCTDefaultReactNativeFactoryDelegate.h"
 #import "RCTReactNativeFactory.h"
@@ -6,6 +6,7 @@
 */

 #import "RCTAppDelegate.h"
+#import <React/RCTBridgeDelegate.h>
 #import <React/RCTLog.h>
 #import <React/RCTRootView.h>
 #import <React/RCTSurfacePresenterBridgeAdapter.h>
@@ -6,6 +6,7 @@
 *
 * @flow strict
 * @format
+ * @deprecated
 */

 'use strict';
@@ -6,6 +6,7 @@
 *
 * @flow strict
 * @format
+ * @deprecated
 */

 'use strict';
@@ -6,6 +6,7 @@
 *
 * @flow
 * @format
+ * @deprecated
 */

 import NativeTiming from './NativeTiming';
@@ -6,6 +6,7 @@
 *
 * @flow strict
 * @format
+ * @deprecated
 */

 export * from '../../../src/private/specs_DEPRECATED/modules/NativeTiming';
@@ -6,6 +6,7 @@
 *
 * @flow
 * @format
+ * @deprecated
 */

 'use strict';
@@ -30,7 +30,8 @@ UIImage *RCTBlurredImageWithRadius(UIImage *inputImage, CGFloat radius)
               }].CGImage;
  }

-  vImage_Buffer buffer1, buffer2;
+  vImage_Buffer buffer1;
+  vImage_Buffer buffer2;
  buffer1.width = buffer2.width = CGImageGetWidth(imageRef);
  buffer1.height = buffer2.height = CGImageGetHeight(imageRef);
  buffer1.rowBytes = buffer2.rowBytes = CGImageGetBytesPerRow(imageRef);
@@ -212,7 +212,8 @@ BOOL RCTUpscalingRequired(
  sourceSize.height *= scale;

  // Calculate aspect ratios if needed (don't bother if resizeMode == stretch)
-  CGFloat aspect = 0.0, targetAspect = 0.0;
+  CGFloat aspect = 0.0;
+  CGFloat targetAspect = 0.0;
  if (resizeMode != RCTResizeModeStretch) {
    aspect = sourceSize.width / sourceSize.height;
    targetAspect = destSize.width / destSize.height;
@@ -90,9 +90,15 @@ uint32_t RCTInterpolateColorInRange(CGFloat value, NSArray<NSNumber *> *inputRan
  CGFloat inputMin = inputRange[rangeIndex].doubleValue;
  CGFloat inputMax = inputRange[rangeIndex + 1].doubleValue;

-  CGFloat redMin, greenMin, blueMin, alphaMin;
+  CGFloat redMin;
+  CGFloat greenMin;
+  CGFloat blueMin;
+  CGFloat alphaMin;
  [outputRange[rangeIndex] getRed:&redMin green:&greenMin blue:&blueMin alpha:&alphaMin];
-  CGFloat redMax, greenMax, blueMax, alphaMax;
+  CGFloat redMax;
+  CGFloat greenMax;
+  CGFloat blueMax;
+  CGFloat alphaMax;
  [outputRange[rangeIndex + 1] getRed:&redMax green:&greenMax blue:&blueMax alpha:&alphaMax];

  return RCTColorFromComponents(
@@ -10,9 +10,9 @@
 #import "RCTNetworkConversions.h"

 #import <React/RCTLog.h>
-#import <jsinspector-modern/network/NetworkReporter.h>
+#import <react/networking/NetworkReporter.h>

-using namespace facebook::react::jsinspector_modern;
+using namespace facebook::react;

 #ifdef REACT_NATIVE_DEBUGGER_ENABLED
 namespace {
@@ -50,6 +50,7 @@ Pod::Spec.new do |s|
  add_dependency(s, "React-jsinspectorcdp", :framework_name => 'jsinspector_moderncdp')
  add_dependency(s, "React-jsinspectornetwork", :framework_name => 'jsinspector_modernnetwork')
  add_dependency(s, "React-NativeModulesApple", :additional_framework_paths => ["build/generated/ios"])
+  add_dependency(s, "React-networking", :framework_name => 'React_networking')

  add_rn_third_party_dependencies(s)
  add_rncore_dependency(s)
@@ -7,7 +7,7 @@
 * @noformat
 * @nolint
 * @flow strict
- * @generated SignedSource<<deb7924d11c790f99448a1c2f0edddb9>>
+ * @generated SignedSource<<c0e57723772ea5f1aa8c3c897ac3c216>>
 */

 import type {
@@ -135,6 +135,7 @@ export type RenderRootOptions = {
    error: mixed,
    errorInfo: {+componentStack?: ?string},
  ) => void,
+  onDefaultTransitionIndicator?: () => void | (() => void),
 };

 /**
@@ -67,7 +67,7 @@ template <typename T>
 facebook::react::LazyVector<T> RCTBridgingToVec(id value, T (^ctor)(id element))
 {
  NSArray *array = RCTBridgingToArray(value);
-  typedef typename facebook::react::LazyVector<T>::size_type _size_t;
+  using _size_t = typename facebook::react::LazyVector<T>::size_type;
  _size_t size = static_cast<_size_t>(array.count);
  return facebook::react::LazyVector<T>::fromUnsafeRawValue(array, size, ctor);
 }
@@ -211,6 +211,18 @@ let reactHermes = RNTarget(
  ]
 )

+/// React-networking.podspec
+let reactNetworking = RNTarget(
+  name: .reactNetworking,
+  path: "ReactCommon/react/networking",
+  excludedPaths: ["tests"],
+  dependencies: [.reactNativeDependencies, .reactJsInspectorNetwork, .reactPerformanceTimeline],
+  defines: [
+    CXXSetting.define("REACT_NATIVE_DEBUGGER_ENABLED", to: "1", .when(configuration: BuildConfiguration.debug)),
+    CXXSetting.define("REACT_NATIVE_DEBUGGER_ENABLED_DEVONLY", to: "1", .when(configuration: BuildConfiguration.debug)),
+  ]
+)
+
 /// React-performancecdpmetrics.podspec
 let reactPerformanceCdpMetrics = RNTarget(
  name: .reactPerformanceCdpMetrics,
@@ -304,6 +316,13 @@ let reactIdleCallbacksNativeModule = RNTarget(
  dependencies: [.reactNativeDependencies, .reactDebug, .reactFeatureFlags, .reactUtils, .reactPerfLogger, .reactCxxReact, .reactTurboModuleCore]
 )

+/// React-webperformance.podspec
+let reactWebPerformanceNativeModule = RNTarget(
+  name: .reactWebPerformanceNativeModule,
+  path: "ReactCommon/react/nativemodule/webperformance",
+  dependencies: [.reactNativeDependencies, .reactCxxReact, .reactTurboModuleCore, .reactPerformanceTimeline]
+)
+
 /// React-featureflagnativemodule.podspec
 let reactFeatureflagsNativemodule = RNTarget(
  name: .reactFeatureflagsNativemodule,
@@ -566,6 +585,7 @@ let targets = [
  reactNativeDependencies,
  hermesPrebuilt,
  reactJsiTooling,
+  reactNetworking,
  reactPerformanceCdpMetrics,
  reactPerformanceTimeline,
  reactRuntimeScheduler,
@@ -590,6 +610,7 @@ let targets = [
  reactTurboModuleCoreDefaults,
  reactTurboModuleCoreMicrotasks,
  reactIdleCallbacksNativeModule,
+  reactWebPerformanceNativeModule,
  reactFeatureflagsNativemodule,
  reactNativeModuleDom,
  reactAppDelegate,
@@ -737,6 +758,7 @@ extension String {
  static let hermesPrebuilt = "hermes-prebuilt"

  static let reactJsiTooling = "React-jsitooling"
+  static let reactNetworking = "React-networking"
  static let reactPerformanceCdpMetrics = "React-performancecdpmetrics"
  static let reactPerformanceTimeline = "React-performancetimeline"
  static let reactRuntimeScheduler = "React-runtimescheduler"
@@ -764,6 +786,7 @@ extension String {
  static let reactTurboModuleCoreDefaults = "ReactCommon/turbomodule/core/defaults"
  static let reactTurboModuleCoreMicrotasks = "ReactCommon/turbomodule/core/microtasks"
  static let reactIdleCallbacksNativeModule = "React-idlecallbacksnativemodule"
+  static let reactWebPerformanceNativeModule = "React-webperformancenativemodule"
  static let reactFeatureflagsNativemodule = "React-featureflagsnativemodule"
  static let reactNativeModuleDom = "React-domnativemodule"
  static let reactAppDelegate = "React-RCTAppDelegate"
@@ -69,6 +69,7 @@ RCT_EXTERN_C_END
 * will be used as the JS module name. If omitted, the JS module name will
 * match the Objective-C class name.
 */
+#ifndef RCT_FIT_RM_OLD_RUNTIME
 #define RCT_EXPORT_MODULE(js_name)          \
  RCT_EXTERN void RCTRegisterModule(Class); \
  +(NSString *)moduleName                   \
@@ -80,6 +81,17 @@ RCT_EXTERN_C_END
    RCTRegisterModule(self);                \
  }

+#else
+
+#define RCT_EXPORT_MODULE(js_name)          \
+  RCT_EXTERN void RCTRegisterModule(Class); \
+  +(NSString *)moduleName                   \
+  {                                         \
+    return @ #js_name;                      \
+  }
+
+#endif // RCT_FIT_RM_OLD_RUNTIME
+
 /**
 * Same as RCT_EXPORT_MODULE, but uses __attribute__((constructor)) for module
 * registration. Useful for registering swift classes that forbids use of load
@@ -721,13 +721,13 @@ NSData *__nullable RCTGzipData(NSData *__nullable input, float level)

  void *libz = dlopen("/usr/lib/libz.dylib", RTLD_LAZY);

-  typedef int (*DeflateInit2_)(z_streamp, int, int, int, int, int, const char *, int);
+  using DeflateInit2_ = int (*)(z_streamp, int, int, int, int, int, const char *, int);
  DeflateInit2_ deflateInit2_ = (DeflateInit2_)dlsym(libz, "deflateInit2_");

-  typedef int (*Deflate)(z_streamp, int);
+  using Deflate = int (*)(z_streamp, int);
  Deflate deflate = (Deflate)dlsym(libz, "deflate");

-  typedef int (*DeflateEnd)(z_streamp);
+  using DeflateEnd = int (*)(z_streamp);
  DeflateEnd deflateEnd = (DeflateEnd)dlsym(libz, "deflateEnd");

  z_stream stream;
@@ -238,11 +238,10 @@ static NSDictionary *RCTExportedDimensions(CGFloat fontScale)
 - (void)interfaceOrientationDidChange
 {
 #if TARGET_OS_IOS && !TARGET_OS_MACCATALYST
-  UIApplication *application = RCTSharedApplication();
-  UIInterfaceOrientation nextOrientation = RCTKeyWindow().windowScene.interfaceOrientation;
+  UIWindow *window = RCTKeyWindow();
+  UIInterfaceOrientation nextOrientation = window.windowScene.interfaceOrientation;

-  BOOL isRunningInFullScreen =
-      CGRectEqualToRect(application.delegate.window.frame, application.delegate.window.screen.bounds);
+  BOOL isRunningInFullScreen = window ? CGRectEqualToRect(window.frame, window.screen.bounds) : YES;
  // We are catching here two situations for multitasking view:
  // a) The app is in Split View and the container gets resized -> !isRunningInFullScreen
  // b) The app changes to/from fullscreen example: App runs in slide over mode and goes into fullscreen->
@@ -81,7 +81,8 @@
    return;
  }

-  CGFloat top = 0, left = 0;
+  CGFloat top = 0;
+  CGFloat left = 0;
  if (contentSize.width < boundsSize.width) {
    left = (boundsSize.width - contentSize.width) * 0.5f;
  }
@@ -91,9 +91,9 @@ Pod::Spec.new do |s|
  add_dependency(s, "React-RCTAnimation", :framework_name => 'RCTAnimation')
  add_dependency(s, "React-jsinspector", :framework_name => 'jsinspector_modern')
  add_dependency(s, "React-jsinspectorcdp", :framework_name => 'jsinspector_moderncdp')
-  add_dependency(s, "React-jsinspectornetwork", :framework_name => 'jsinspector_modernnetwork')
  add_dependency(s, "React-jsinspectortracing", :framework_name => 'jsinspector_moderntracing')
  add_dependency(s, "React-performancecdpmetrics", :framework_name => 'React_performancecdpmetrics')
+  add_dependency(s, "React-networking", :framework_name => 'React_networking')
  add_dependency(s, "React-renderercss")
  add_dependency(s, "React-RCTFBReactNativeSpec")

@@ -80,7 +80,9 @@ static void RCTPathAddEllipticArc(
    CGFloat endAngle,
    BOOL clockwise)
 {
-  CGFloat xScale = 1, yScale = 1, radius = 0;
+  CGFloat xScale = 1;
+  CGFloat yScale = 1;
+  CGFloat radius = 0;
  if (size.width != 0) {
    xScale = 1;
    yScale = size.height / size.width;
@@ -679,7 +679,8 @@ RCT_SCROLL_EVENT_HANDLER(scrollViewDidScrollToTop, onScrollToTop)
    return;
  }

-  CGFloat top = 0, left = 0;
+  CGFloat top = 0;
+  CGFloat left = 0;
  if (contentSize.width < boundsSize.width) {
    left = (boundsSize.width - contentSize.width) * 0.5f;
  }
@@ -2354,12 +2354,14 @@ public class com/facebook/react/fabric/mounting/SurfaceMountingManager {
 	public fun sendAccessibilityEvent (II)V
 	public fun setJSResponder (IIZ)V
 	public fun stopSurface ()V
+	public fun storeSynchronousMountPropsOverride (ILcom/facebook/react/bridge/ReadableMap;)V
 	public fun sweepActiveTouchForTag (I)V
 	public fun updateEventEmitter (ILcom/facebook/react/fabric/events/EventEmitterWrapper;)V
 	public fun updateLayout (IIIIIIII)V
 	public fun updateOverflowInset (IIIII)V
 	public fun updatePadding (IIIII)V
 	public fun updateProps (ILcom/facebook/react/bridge/ReadableMap;)V
+	public fun updatePropsSynchronously (ILcom/facebook/react/bridge/ReadableMap;)V
 	public fun updateState (ILcom/facebook/react/uimanager/StateWrapper;)V
 }

@@ -1,5 +1,4 @@
 VERSION_NAME=1000.0.0
-HERMES_VERSION_NAME=1000.0.0
 react.internal.publishingGroup=com.facebook.react
 react.internal.hermesPublishingGroup=com.facebook.hermes

@@ -88,7 +88,7 @@ val hermesVersionProvider: Provider<String> =
      val hermesVersionFile =
          File(
              reactNativeRootDir,
-              if (hermesV1Enabled) "sdks/.hermesv1version" else "\"sdks/.hermesversion\"",
+              if (hermesV1Enabled) "sdks/.hermesv1version" else "sdks/.hermesversion",
          )

      if (hermesVersionFile.exists()) {
@@ -96,7 +96,7 @@ public class CatalystInstanceImpl implements CatalystInstance {
  private final TraceListener mTraceListener;
  private final JavaScriptModuleRegistry mJSModuleRegistry;
  private final JSBundleLoader mJSBundleLoader;
-  private final ArrayList<PendingJSCall> mJSCallsPendingInit = new ArrayList<PendingJSCall>();
+  private final ArrayList<PendingJSCall> mJSCallsPendingInit = new ArrayList<>();
  private final Object mJSCallsPendingInitLock = new Object();

  private final NativeModuleRegistry mNativeModuleRegistry;
@@ -83,6 +83,6 @@ internal class BridgelessDevSupportManager(
  }

  fun tracingState(): TracingState {
-    return TracingState.DISABLED
+    return TracingState.ENABLEDINCDPMODE
  }
 }
@@ -68,6 +68,7 @@ import com.facebook.react.devsupport.interfaces.StackFrame
 import com.facebook.react.devsupport.interfaces.TracingState
 import com.facebook.react.devsupport.interfaces.TracingStateProvider
 import com.facebook.react.devsupport.perfmonitor.PerfMonitorDevHelper
+import com.facebook.react.devsupport.perfmonitor.PerfMonitorOverlayManager
 import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
 import com.facebook.react.internal.featureflags.ReactNativeNewArchitectureFeatureFlags
 import com.facebook.react.modules.core.RCTNativeAppEventEmitter
@@ -77,6 +78,7 @@ import java.io.File
 import java.net.MalformedURLException
 import java.net.URL
 import java.util.Locale
+import javax.inject.Provider

 public abstract class DevSupportManagerBase(
    protected val applicationContext: Context,
@@ -182,7 +184,7 @@ public abstract class DevSupportManagerBase(
          null
        }

-  private var perfMonitorOverlayManager: PerfMonitorOverlayViewManager? = null
+  private var perfMonitorOverlayManager: PerfMonitorOverlayManager? = null
  private var tracingStateProvider: TracingStateProvider? = null

  init {
@@ -215,19 +217,18 @@ public abstract class DevSupportManagerBase(
    if (
        ReactNativeNewArchitectureFeatureFlags.enableBridgelessArchitecture() &&
            ReactNativeFeatureFlags.perfMonitorV2Enabled() &&
-            reactInstanceDevHelper is PerfMonitorDevHelper &&
-            perfMonitorOverlayManager == null
+            reactInstanceDevHelper is PerfMonitorDevHelper
    ) {
      perfMonitorOverlayManager =
-          PerfMonitorOverlayViewManager(
-              Supplier {
+          PerfMonitorOverlayManager(
+              reactInstanceDevHelper,
+              Provider {
                val context = reactInstanceDevHelper.currentActivity
                if (context == null || context.isFinishing) {
-                  return@Supplier null
+                  return@Provider null
                }
                context
              },
-              reactInstanceDevHelper.inspectorTarget,
          )
    }
  }
@@ -548,10 +549,11 @@ public abstract class DevSupportManagerBase(
  override fun onNewReactContextCreated(reactContext: ReactContext) {
    resetCurrentContext(reactContext)

-    if (perfMonitorOverlayManager != null && reactInstanceDevHelper is PerfMonitorDevHelper) {
+    if (reactInstanceDevHelper is PerfMonitorDevHelper) {
      perfMonitorOverlayManager?.let { manager ->
        reactInstanceDevHelper.inspectorTarget?.addPerfMonitorListener(manager)
      }
+      perfMonitorOverlayManager?.enable()
    }
  }

@@ -882,6 +884,7 @@ public abstract class DevSupportManagerBase(

            override fun onPackagerDisconnected() {
              isPackagerConnected = false
+              perfMonitorOverlayManager?.disable()
            }

            override fun onPackagerReloadCommand() {
@@ -1,278 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.devsupport
-
-import android.app.Dialog
-import android.content.Context
-import android.graphics.Color
-import android.graphics.Typeface
-import android.graphics.drawable.ColorDrawable
-import android.graphics.drawable.GradientDrawable
-import android.os.Handler
-import android.os.Looper
-import android.view.Gravity
-import android.view.Window
-import android.view.WindowManager
-import android.widget.LinearLayout
-import android.widget.TextView
-import androidx.core.util.Supplier
-import androidx.core.view.ViewCompat
-import androidx.core.view.WindowInsetsCompat
-import com.facebook.react.R
-import com.facebook.react.bridge.UiThreadUtil
-import com.facebook.react.devsupport.interfaces.PerfMonitorOverlayManager
-import com.facebook.react.devsupport.interfaces.TracingState
-import com.facebook.react.devsupport.perfmonitor.PerfMonitorInspectorTargetBinding
-import com.facebook.react.devsupport.perfmonitor.PerfMonitorUpdateListener
-import com.facebook.react.uimanager.DisplayMetricsHolder
-import com.facebook.react.uimanager.PixelUtil
-import java.util.Locale
-
-internal class PerfMonitorOverlayViewManager(
-    private val contextSupplier: Supplier<Context?>,
-    private val inspectorTarget: PerfMonitorInspectorTargetBinding?,
-) : PerfMonitorOverlayManager, PerfMonitorUpdateListener {
-  private var initialized: Boolean = false
-  private var enabled: Boolean = false
-  private var hasInteractionData: Boolean = false
-  private var interactionDialog: Dialog? = null
-  private var buttonDialog: Dialog? = null
-  private var durationLabel: TextView? = null
-  private var ttl: Int = 0
-  private var hideAfterTimeoutHandler: Handler? = null
-
-  override fun enable() {
-    UiThreadUtil.runOnUiThread {
-      enabled = true
-      if (hasInteractionData) {
-        showOverlay()
-      }
-    }
-  }
-
-  override fun disable() {
-    UiThreadUtil.runOnUiThread {
-      enabled = false
-      hideOverlay()
-    }
-  }
-
-  override fun reset() {
-    UiThreadUtil.runOnUiThread {
-      hasInteractionData = false
-      hideOverlay()
-    }
-  }
-
-  override fun onRecordingStateChanged(state: TracingState) {
-    // recordingState = state
-    // view?.updateRecordingState(state)
-  }
-
-  override fun onNewFocusedEvent(data: PerfMonitorUpdateListener.LongTaskEventData) {
-    UiThreadUtil.runOnUiThread {
-      ensureInitialized()
-      durationLabel?.text = String.format(Locale.US, "%d ms", data.durationMs)
-      durationLabel?.setTextColor(getDurationHighlightColor(data.responsivenessScore))
-      hasInteractionData = true
-      ttl = data.ttl
-
-      hideAfterTimeoutHandler?.removeCallbacksAndMessages(null)
-
-      if (enabled) {
-        showOverlay()
-
-        // Schedule hiding overlay after ttl milliseconds
-        if (ttl > 0) {
-          if (hideAfterTimeoutHandler == null) {
-            hideAfterTimeoutHandler = Handler(Looper.getMainLooper())
-          }
-          hideAfterTimeoutHandler?.postDelayed({ hideOverlay() }, ttl.toLong())
-        }
-      }
-    }
-  }
-
-  private fun ensureInitialized() {
-    if (initialized) {
-      return
-    }
-    val context = contextSupplier.get() ?: return
-    DisplayMetricsHolder.initDisplayMetricsIfNotInitialized(context)
-    createDialog(context)
-    createButton(context)
-    initialized = true
-  }
-
-  private fun showOverlay() {
-    interactionDialog?.show()
-    buttonDialog?.show()
-  }
-
-  private fun hideOverlay() {
-    interactionDialog?.hide()
-    buttonDialog?.hide()
-  }
-
-  private fun createDialog(context: Context) {
-    val containerLayout = createInnerLayout(context)
-    val longTaskLabel =
-        TextView(context).apply {
-          textSize = TEXT_SIZE_PRIMARY
-          text = "Long Task"
-          setTextColor(Color.WHITE)
-          typeface = TYPEFACE_BOLD
-        }
-    durationLabel =
-        TextView(context).apply {
-          textSize = TEXT_SIZE_PRIMARY
-          setTextColor(COLOR_TEXT_GREEN)
-          typeface = TYPEFACE_BOLD
-        }
-    containerLayout.addView(longTaskLabel)
-    containerLayout.addView(durationLabel)
-
-    val dialog =
-        createAnchoredDialog(context, dpToPx(140f), dpToPx(16f)).apply {
-          setContentView(containerLayout)
-        }
-    dialog.window?.apply {
-      attributes =
-          attributes?.apply {
-            flags =
-                flags or
-                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE or
-                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
-          }
-    }
-
-    this.interactionDialog = dialog
-  }
-
-  fun updateRecordingState(state: TracingState) {}
-
-  private fun createButton(context: Context) {
-    val buttonInner = createInnerLayout(context)
-    buttonInner.addView(
-        TextView(context).apply {
-          text = "Analyze"
-          textSize = TEXT_SIZE_PRIMARY
-          setTextColor(Color.WHITE)
-          typeface = TYPEFACE_BOLD
-        }
-    )
-    buttonInner.addView(
-        TextView(context).apply {
-          text = "cmd + A"
-          textSize = TEXT_SIZE_ACCESSORY
-          setTextColor(Color.WHITE)
-          alpha = 0.7f
-          typeface = TYPEFACE_BOLD
-        }
-    )
-    val buttonView =
-        LinearLayout(context).apply {
-          orientation = LinearLayout.VERTICAL
-          setPadding(
-              dpToPx(8f).toInt(),
-              dpToPx(16f).toInt(),
-              dpToPx(16f).toInt(),
-              dpToPx(8f).toInt(),
-          )
-          addView(buttonInner)
-          setOnClickListener { inspectorTarget?.pauseAndAnalyzeBackgroundTrace() }
-        }
-    val dialog =
-        createAnchoredDialog(context, dpToPx(0f), dpToPx(0f)).apply { setContentView(buttonView) }
-    dialog.window?.apply {
-      attributes =
-          attributes?.apply { flags = flags or WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE }
-    }
-
-    this.buttonDialog = dialog
-  }
-
-  private fun createAnchoredDialog(context: Context, offsetX: Float, offsetY: Float): Dialog {
-    val dialog =
-        Dialog(context, R.style.NoAnimationDialog).apply {
-          requestWindowFeature(Window.FEATURE_NO_TITLE)
-          window?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
-          window?.setDimAmount(0f)
-          setCancelable(false)
-        }
-    dialog.window?.apply {
-      attributes =
-          attributes?.apply {
-            width = WindowManager.LayoutParams.WRAP_CONTENT
-            height = WindowManager.LayoutParams.WRAP_CONTENT
-            gravity = Gravity.TOP or Gravity.END
-            x = offsetX.toInt()
-            y = offsetY.toInt()
-          }
-    }
-    dialog.window?.decorView?.let { decorView ->
-      ViewCompat.setOnApplyWindowInsetsListener(decorView) { view, windowInsets ->
-        val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
-        val layoutParams = (view.layoutParams as WindowManager.LayoutParams)
-        layoutParams.y = insets.top + offsetY.toInt()
-        dialog.window?.attributes = layoutParams
-        WindowInsetsCompat.CONSUMED
-      }
-    }
-
-    return dialog
-  }
-
-  private fun createInnerLayout(context: Context): LinearLayout {
-    return LinearLayout(context).apply {
-      orientation = LinearLayout.HORIZONTAL
-      gravity = Gravity.CENTER_VERTICAL
-      val paddingHorizontal = dpToPx(14f).toInt()
-      val paddingVertical = dpToPx(8f).toInt()
-      setPadding(paddingHorizontal, paddingVertical, paddingHorizontal, paddingVertical)
-      layoutParams =
-          LinearLayout.LayoutParams(
-              LinearLayout.LayoutParams.WRAP_CONTENT,
-              LinearLayout.LayoutParams.WRAP_CONTENT,
-          )
-      background =
-          GradientDrawable().apply {
-            shape = GradientDrawable.RECTANGLE
-            setColor(Color.BLACK)
-            cornerRadius = dpToPx(14.5f)
-            alpha = (0.8 * 255).toInt()
-            setStroke(dpToPx(1f).toInt(), COLOR_OVERLAY_BORDER)
-          }
-      showDividers = LinearLayout.SHOW_DIVIDER_MIDDLE
-      dividerDrawable =
-          object : ColorDrawable(Color.TRANSPARENT) {
-            override fun getIntrinsicWidth(): Int = dpToPx(8f).toInt()
-          }
-    }
-  }
-
-  private fun getDurationHighlightColor(responsivenessScore: Int): Int {
-    return when (responsivenessScore) {
-      3 -> COLOR_TEXT_RED
-      2 -> COLOR_TEXT_YELLOW
-      else -> COLOR_TEXT_GREEN
-    }
-  }
-
-  private fun dpToPx(dp: Float): Float = PixelUtil.toPixelFromDIP(dp)
-
-  companion object {
-    private val COLOR_TEXT_GREEN = Color.parseColor("#4AEB2F")
-    private val COLOR_TEXT_YELLOW = Color.parseColor("#FFAA00")
-    private val COLOR_TEXT_RED = Color.parseColor("#FF0000")
-    private val COLOR_OVERLAY_BORDER = Color.parseColor("#6C6C6C")
-    private val TEXT_SIZE_PRIMARY = 13f
-    private val TEXT_SIZE_ACCESSORY = 9f
-    private val TYPEFACE_BOLD = Typeface.create("sans-serif", Typeface.BOLD)
-  }
-}
@@ -1,20 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-package com.facebook.react.devsupport.interfaces
-
-/** [Experimental] Interface to manage the V2 Perf Monitor overlay. */
-internal interface PerfMonitorOverlayManager {
-  /** Enable the Perf Monitor overlay. Will be shown when updates are received. */
-  public fun enable()
-
-  /** Disable the Perf Monitor overlay. Will remain hidden when updates are received. */
-  public fun disable()
-
-  /** Reset the Perf Monitor overlay, e.g. after a reload. */
-  public fun reset()
-}
@@ -7,11 +7,16 @@

 package com.facebook.react.devsupport.perfmonitor

+import com.facebook.react.devsupport.interfaces.TracingState
+
 /**
 * [Experimental] Interface implemented by [com.facebook.react.runtime.ReactHostInspectorTarget]
 * exposing actions for the V2 Perf Monitor.
 */
 internal interface PerfMonitorInspectorTargetBinding {
+  /** Get the current CDP or background performance tracing state. */
+  public fun getTracingState(): TracingState
+
  /** Attempt to pause the current background performance trace, and open in DevTools. */
  public fun pauseAndAnalyzeBackgroundTrace()

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.devsupport.perfmonitor
+
+import android.content.Context
+import com.facebook.react.bridge.UiThreadUtil
+import com.facebook.react.devsupport.interfaces.TracingState
+import javax.inject.Provider
+
+internal class PerfMonitorOverlayManager(
+    private val devHelper: PerfMonitorDevHelper,
+    private val contextProvider: Provider<Context?>,
+) : PerfMonitorUpdateListener {
+  private var enabled: Boolean = false
+  private var initialized: Boolean = false
+  private var view: PerfMonitorOverlayView? = null
+
+  private fun init() {
+    if (initialized || !enabled) {
+      return
+    }
+
+    UiThreadUtil.runOnUiThread {
+      val context = contextProvider.get() ?: return@runOnUiThread
+      view = PerfMonitorOverlayView(context)
+
+      // Start background tracing
+      devHelper.inspectorTarget?.resumeBackgroundTrace()
+
+      view?.show()
+      initialized = true
+    }
+  }
+
+  /** Enable the Perf Monitor overlay. Will be shown when updates are received. */
+  fun enable() {
+    enabled = true
+    init()
+  }
+
+  /** Disable the Perf Monitor overlay. Will remain hidden when updates are received. */
+  fun disable() {
+    UiThreadUtil.runOnUiThread { view?.hide() }
+    view = null
+    enabled = false
+  }
+
+  /** Reset the Perf Monitor overlay, e.g. after a reload. */
+  fun reset() {
+    // Update with current recording state
+    onRecordingStateChanged(
+        devHelper.inspectorTarget?.getTracingState() ?: TracingState.ENABLEDINCDPMODE
+    )
+  }
+
+  override fun onRecordingStateChanged(state: TracingState) {
+    view?.updateRecordingState(state)
+  }
+}
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.devsupport.perfmonitor
+
+import android.app.Dialog
+import android.content.Context
+import android.graphics.Color
+import android.graphics.Typeface
+import android.graphics.drawable.ColorDrawable
+import android.graphics.drawable.GradientDrawable
+import android.view.Gravity
+import android.view.Window
+import android.view.WindowManager
+import android.widget.LinearLayout
+import android.widget.TextView
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import com.facebook.react.R
+import com.facebook.react.devsupport.interfaces.TracingState
+import com.facebook.react.uimanager.DisplayMetricsHolder
+import com.facebook.react.uimanager.PixelUtil
+
+internal class PerfMonitorOverlayView(
+    private val context: Context,
+) {
+  private val dialog: Dialog
+  private lateinit var statusLabel: TextView
+  private lateinit var tooltipLabel: TextView
+  private lateinit var statusIndicator: TextView
+
+  init {
+    DisplayMetricsHolder.initDisplayMetricsIfNotInitialized(context)
+    dialog = createToolbarDialog()
+  }
+
+  fun show() {
+    dialog.show()
+  }
+
+  fun hide() {
+    dialog.hide()
+  }
+
+  fun updateRecordingState(state: TracingState) {
+    if (state == TracingState.ENABLEDINCDPMODE) {
+      dialog.hide()
+      return
+    }
+
+    if (state == TracingState.ENABLEDINBACKGROUNDMODE) {
+      (statusIndicator.background as GradientDrawable).setColor(Color.RED)
+      statusLabel.text = "Background Profiling Active"
+      tooltipLabel.text = "Press ☰ to open"
+    } else {
+      (statusIndicator.background as GradientDrawable).setColor(Color.GRAY)
+      statusLabel.text = "Background Profiling Stopped"
+      tooltipLabel.text = "Press ☰ to restart"
+    }
+    dialog.show()
+  }
+
+  private fun createToolbarDialog(): Dialog {
+    statusIndicator =
+        TextView(context).apply {
+          width = dpToPx(12f).toInt()
+          height = dpToPx(12f).toInt()
+          background =
+              GradientDrawable().apply {
+                shape = GradientDrawable.OVAL
+                setColor(Color.RED)
+              }
+        }
+
+    val textContainer =
+        LinearLayout(context).apply {
+          orientation = LinearLayout.VERTICAL
+          layoutParams =
+              LinearLayout.LayoutParams(
+                  LinearLayout.LayoutParams.WRAP_CONTENT,
+                  LinearLayout.LayoutParams.WRAP_CONTENT,
+              )
+        }
+    statusLabel =
+        TextView(context).apply {
+          textSize = TEXT_SIZE_PRIMARY
+          setTextColor(Color.WHITE)
+          typeface = TYPEFACE_BOLD
+        }
+    tooltipLabel =
+        TextView(context).apply {
+          textSize = TEXT_SIZE_ACCESSORY
+          setTextColor(Color.WHITE)
+          typeface = TYPEFACE_BOLD
+        }
+    textContainer.addView(statusLabel)
+    textContainer.addView(tooltipLabel)
+
+    val containerLayout = createInnerLayout()
+    containerLayout.addView(statusIndicator)
+    containerLayout.addView(textContainer)
+
+    val dialog =
+        createAnchoredDialog(dpToPx(12f), dpToPx(12f)).apply { setContentView(containerLayout) }
+    dialog.window?.apply {
+      attributes =
+          attributes?.apply {
+            flags =
+                flags or
+                    WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE or
+                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
+          }
+    }
+
+    return dialog
+  }
+
+  private fun createAnchoredDialog(offsetX: Float, offsetY: Float): Dialog {
+    val dialog =
+        Dialog(context, R.style.NoAnimationDialog).apply {
+          requestWindowFeature(Window.FEATURE_NO_TITLE)
+          window?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
+          window?.setDimAmount(0f)
+          setCancelable(false)
+        }
+    dialog.window?.apply {
+      attributes =
+          attributes?.apply {
+            width = WindowManager.LayoutParams.WRAP_CONTENT
+            height = WindowManager.LayoutParams.WRAP_CONTENT
+            gravity = Gravity.TOP or Gravity.END
+            x = offsetX.toInt()
+            y = offsetY.toInt()
+          }
+    }
+    dialog.window?.decorView?.let { decorView ->
+      ViewCompat.setOnApplyWindowInsetsListener(decorView) { view, windowInsets ->
+        val insets = windowInsets.getInsets(WindowInsetsCompat.Type.systemBars())
+        val layoutParams = (view.layoutParams as WindowManager.LayoutParams)
+        layoutParams.y = insets.top + offsetY.toInt()
+        dialog.window?.attributes = layoutParams
+        WindowInsetsCompat.CONSUMED
+      }
+    }
+
+    return dialog
+  }
+
+  private fun createInnerLayout(): LinearLayout {
+    return LinearLayout(context).apply {
+      orientation = LinearLayout.HORIZONTAL
+      gravity = Gravity.CENTER_VERTICAL
+      val paddingHorizontal = dpToPx(14f).toInt()
+      val paddingVertical = dpToPx(7f).toInt()
+      setPadding(paddingHorizontal, paddingVertical, paddingHorizontal, paddingVertical)
+      layoutParams =
+          LinearLayout.LayoutParams(
+              LinearLayout.LayoutParams.WRAP_CONTENT,
+              LinearLayout.LayoutParams.WRAP_CONTENT,
+          )
+      background =
+          GradientDrawable().apply {
+            shape = GradientDrawable.RECTANGLE
+            setColor(Color.BLACK)
+            cornerRadius = dpToPx(14.5f)
+            alpha = (0.8 * 255).toInt()
+            setStroke(dpToPx(1f).toInt(), COLOR_OVERLAY_BORDER)
+          }
+      showDividers = LinearLayout.SHOW_DIVIDER_MIDDLE
+      dividerDrawable =
+          object : ColorDrawable(Color.TRANSPARENT) {
+            override fun getIntrinsicWidth(): Int = dpToPx(8f).toInt()
+          }
+    }
+  }
+
+  private fun dpToPx(dp: Float): Float = PixelUtil.toPixelFromDIP(dp)
+
+  companion object {
+    private val COLOR_OVERLAY_BORDER = Color.parseColor("#6C6C6C")
+    private val TEXT_SIZE_PRIMARY = 12f
+    private val TEXT_SIZE_ACCESSORY = 10f
+    private val TYPEFACE_BOLD = Typeface.create("sans-serif", Typeface.BOLD)
+  }
+}
@@ -10,15 +10,6 @@ import com.facebook.react.devsupport.interfaces.TracingState

 /** [Experimental] An interface for subscribing to updates for the V2 Perf Monitor. */
 internal interface PerfMonitorUpdateListener {
-  data class LongTaskEventData(
-      val durationMs: Int,
-      val responsivenessScore: Int,
-      val ttl: Int,
-  )
-
-  /** Called when a new active performance event should be displayed. */
-  fun onNewFocusedEvent(data: LongTaskEventData)
-
  /** Called when the recording state of the background performance trace has changed. */
  fun onRecordingStateChanged(state: TracingState)
 }
@@ -791,7 +791,8 @@ public class FabricUIManager
          @Override
          public void execute(MountingManager mountingManager) {
            try {
-              mountingManager.updateProps(reactTag, props);
+              mountingManager.storeSynchronousMountPropsOverride(reactTag, props);
+              mountingManager.updatePropsSynchronously(reactTag, props);
            } catch (Exception ex) {
              // TODO T42943890: Fix animations in Fabric and remove this try/catch?
              // There might always be race conditions between surface teardown and
@@ -265,13 +265,23 @@ internal class MountingManager(
  }

  @UiThread
-  fun updateProps(reactTag: Int, props: ReadableMap?) {
+  fun storeSynchronousMountPropsOverride(reactTag: Int, props: ReadableMap?) {
    assertOnUiThread()
    if (props == null) {
      return
    }

-    getSurfaceManagerForViewEnforced(reactTag).updateProps(reactTag, props)
+    getSurfaceManagerForViewEnforced(reactTag).storeSynchronousMountPropsOverride(reactTag, props)
+  }
+
+  @UiThread
+  fun updatePropsSynchronously(reactTag: Int, props: ReadableMap?) {
+    assertOnUiThread()
+    if (props == null) {
+      return
+    }
+
+    getSurfaceManagerForViewEnforced(reactTag).updatePropsSynchronously(reactTag, props)
  }

  /**
@@ -27,10 +27,14 @@ import com.facebook.react.bridge.ReactNoCrashSoftException;
 import com.facebook.react.bridge.ReactSoftExceptionLogger;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
+import com.facebook.react.bridge.ReadableType;
 import com.facebook.react.bridge.RetryableMountingLayerException;
 import com.facebook.react.bridge.SoftAssertions;
 import com.facebook.react.bridge.UiThreadUtil;
+import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.bridge.WritableNativeArray;
+import com.facebook.react.bridge.WritableNativeMap;
 import com.facebook.react.common.annotations.UnstableReactNativeAPI;
 import com.facebook.react.common.build.ReactBuildConfig;
 import com.facebook.react.common.mapbuffer.MapBuffer;
@@ -53,7 +57,10 @@ import com.facebook.react.uimanager.ViewManagerRegistry;
 import com.facebook.react.uimanager.events.EventCategoryDef;
 import com.facebook.systrace.Systrace;
 import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.Map;
 import java.util.Queue;
@@ -96,6 +103,11 @@ public class SurfaceMountingManager {
  // This is null *until* StopSurface is called.
  private SparseArrayCompat<Object> mTagSetForStoppedSurface;

+  // This is to make sure direct manipulation result will not be overridden by React update.
+  @ThreadConfined(UI)
+  private final SparseArrayCompat<Map<String, Object>> mTagToSynchronousMountProps =
+      new SparseArrayCompat<>();
+
  private final int mSurfaceId;

  public SurfaceMountingManager(
@@ -682,13 +694,110 @@ public class SurfaceMountingManager {
    }
  }

+  private static void overridePropsReadableMap(
+      Map<String, Object> patchMap, WritableMap outputReadableMap) {
+    for (Map.Entry<String, Object> entry : patchMap.entrySet()) {
+      String propKey = entry.getKey();
+      if (outputReadableMap.hasKey(propKey)) {
+        Object propValue = entry.getValue();
+        if (propKey.equals("transform")) {
+          assert (outputReadableMap.getType(propKey) == ReadableType.Array
+              && propValue instanceof ArrayList);
+          WritableArray array = new WritableNativeArray();
+          for (Object item : (ArrayList<?>) propValue) {
+            if (item instanceof HashMap) {
+              WritableNativeMap itemMap = new WritableNativeMap();
+              for (Map.Entry<String, Object> itemEntry :
+                  ((HashMap<String, Object>) item).entrySet()) {
+                if (itemEntry.getValue() instanceof String) {
+                  itemMap.putString(itemEntry.getKey(), (String) itemEntry.getValue());
+                } else if (itemEntry.getValue() instanceof Number) {
+                  itemMap.putDouble(
+                      itemEntry.getKey(), ((Number) itemEntry.getValue()).doubleValue());
+                }
+              }
+              array.pushMap(itemMap);
+            }
+          }
+          outputReadableMap.putArray(propKey, array);
+        } else if (propKey.equals("opacity")) {
+          assert (outputReadableMap.getType(propKey) == ReadableType.Number
+              && propValue instanceof Number);
+          outputReadableMap.putDouble(propKey, ((Number) propValue).doubleValue());
+        }
+      }
+    }
+  }
+
+  private static Map<String, Object> getHashMapFromPropsReadableMap(ReadableMap readableMap) {
+    HashMap<String, Object> outputMap = new HashMap<>();
+
+    Iterator<Map.Entry<String, Object>> iter = readableMap.getEntryIterator();
+    while (iter.hasNext()) {
+      Map.Entry<String, Object> entry = iter.next();
+      String propKey = entry.getKey();
+      Object propValue = entry.getValue();
+      if (propKey.equals("transform") && propValue instanceof ReadableArray) {
+        ArrayList<HashMap<String, Object>> arrayList = new ArrayList<>();
+        for (int i = 0; i < ((ReadableArray) propValue).size(); i++) {
+          ReadableMap map = ((ReadableArray) propValue).getMap(i);
+          if (map != null) {
+            arrayList.add(map.toHashMap());
+          }
+        }
+        outputMap.put(propKey, arrayList);
+      } else if (propKey.equals("opacity") && propValue instanceof Number) {
+        outputMap.put(propKey, ((Number) propValue).doubleValue());
+      }
+    }
+
+    return outputMap;
+  }
+
+  public void storeSynchronousMountPropsOverride(int reactTag, ReadableMap props) {
+    if (ReactNativeFeatureFlags.overrideBySynchronousMountPropsAtMountingAndroid()) {
+      Map<String, Object> propsMap = getHashMapFromPropsReadableMap(props);
+      if (mTagToSynchronousMountProps.containsKey(reactTag)) {
+        Map<String, Object> mergedPropsMap =
+            Assertions.assertNotNull(mTagToSynchronousMountProps.get(reactTag));
+        mergedPropsMap.putAll(propsMap);
+        mTagToSynchronousMountProps.put(reactTag, mergedPropsMap);
+      } else {
+        mTagToSynchronousMountProps.put(reactTag, propsMap);
+      }
+    }
+  }
+
+  public void updatePropsSynchronously(int reactTag, ReadableMap props) {
+    updateProps(reactTag, props, true);
+  }
+
  public void updateProps(int reactTag, ReadableMap props) {
+    updateProps(reactTag, props, false);
+  }
+
+  @UiThread
+  private void updateProps(
+      int reactTag, ReadableMap props, Boolean shouldSkipSynchronousMountPropsOverride) {
    if (isStopped()) {
      return;
    }

    ViewState viewState = getViewState(reactTag);
-    viewState.mCurrentProps = new ReactStylesDiffMap(props);
+
+    if (ReactNativeFeatureFlags.overrideBySynchronousMountPropsAtMountingAndroid()
+        && !shouldSkipSynchronousMountPropsOverride
+        && mTagToSynchronousMountProps.containsKey(reactTag)) {
+      WritableMap modifiedProps = new WritableNativeMap();
+      modifiedProps.merge(props);
+      Map<String, Object> directPropsMap =
+          Assertions.assertNotNull(mTagToSynchronousMountProps.get(reactTag));
+      overridePropsReadableMap(directPropsMap, modifiedProps);
+      viewState.mCurrentProps = new ReactStylesDiffMap(modifiedProps);
+    } else {
+      viewState.mCurrentProps = new ReactStylesDiffMap(props);
+    }
+
    View view = viewState.mView;

    if (view == null) {
@@ -1057,6 +1166,11 @@ public class SurfaceMountingManager {
      return;
    }

+    if (ReactNativeFeatureFlags.overrideBySynchronousMountPropsAtMountingAndroid()
+        && mTagToSynchronousMountProps.containsKey(reactTag)) {
+      mTagToSynchronousMountProps.remove(reactTag);
+    }
+
    ViewState viewState = getNullableViewState(reactTag);

    if (viewState == null) {
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<92a6edded037a504fc1c2c8ae88deae1>>
+ * @generated SignedSource<<af10f4eea240ae4a228de9bbc4b78b7e>>
 */

 /**
@@ -90,6 +90,12 @@ public object ReactNativeFeatureFlags {
  @JvmStatic
  public fun enableAccumulatedUpdatesInRawPropsAndroid(): Boolean = accessor.enableAccumulatedUpdatesInRawPropsAndroid()

+  /**
+   * Enables linear text rendering on Android wherever subpixel text rendering is enabled
+   */
+  @JvmStatic
+  public fun enableAndroidLinearText(): Boolean = accessor.enableAndroidLinearText()
+
  /**
   * Enables various optimizations throughout the path of measuring text on Android.
   */
@@ -300,6 +306,12 @@ public object ReactNativeFeatureFlags {
  @JvmStatic
  public fun enableVirtualViewWindowFocusDetection(): Boolean = accessor.enableVirtualViewWindowFocusDetection()

+  /**
+   * Enable Web Performance APIs (Performance Timeline, User Timings, etc.) by default.
+   */
+  @JvmStatic
+  public fun enableWebPerformanceAPIsByDefault(): Boolean = accessor.enableWebPerformanceAPIsByDefault()
+
  /**
   * Uses the default event priority instead of the discreet event priority by default when dispatching events from Fabric to React.
   */
@@ -324,6 +336,12 @@ public object ReactNativeFeatureFlags {
  @JvmStatic
  public fun hideOffscreenVirtualViewsOnIOS(): Boolean = accessor.hideOffscreenVirtualViewsOnIOS()

+  /**
+   * Override props at mounting with synchronously mounted (i.e. direct manipulation) props from Native Animated.
+   */
+  @JvmStatic
+  public fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean = accessor.overrideBySynchronousMountPropsAtMountingAndroid()
+
  /**
   * Enable the V2 in-app Performance Monitor. This flag is global and should not be changed across React Host lifetimes.
   */
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<ebbc6602fc8e3fb4c510bbd47361a7f0>>
+ * @generated SignedSource<<0b5ee4e7d8800ea89c97b2501d121b6e>>
 */

 /**
@@ -30,6 +30,7 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
  private var disableTextLayoutManagerCacheAndroidCache: Boolean? = null
  private var enableAccessibilityOrderCache: Boolean? = null
  private var enableAccumulatedUpdatesInRawPropsAndroidCache: Boolean? = null
+  private var enableAndroidLinearTextCache: Boolean? = null
  private var enableAndroidTextMeasurementOptimizationsCache: Boolean? = null
  private var enableBridgelessArchitectureCache: Boolean? = null
  private var enableCppPropsIteratorSetterCache: Boolean? = null
@@ -65,10 +66,12 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
  private var enableVirtualViewDebugFeaturesCache: Boolean? = null
  private var enableVirtualViewRenderStateCache: Boolean? = null
  private var enableVirtualViewWindowFocusDetectionCache: Boolean? = null
+  private var enableWebPerformanceAPIsByDefaultCache: Boolean? = null
  private var fixMappingOfEventPrioritiesBetweenFabricAndReactCache: Boolean? = null
  private var fuseboxEnabledReleaseCache: Boolean? = null
  private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
  private var hideOffscreenVirtualViewsOnIOSCache: Boolean? = null
+  private var overrideBySynchronousMountPropsAtMountingAndroidCache: Boolean? = null
  private var perfMonitorV2EnabledCache: Boolean? = null
  private var preparedTextCacheSizeCache: Double? = null
  private var preventShadowTreeCommitExhaustionCache: Boolean? = null
@@ -180,6 +183,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
    return cached
  }

+  override fun enableAndroidLinearText(): Boolean {
+    var cached = enableAndroidLinearTextCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableAndroidLinearText()
+      enableAndroidLinearTextCache = cached
+    }
+    return cached
+  }
+
  override fun enableAndroidTextMeasurementOptimizations(): Boolean {
    var cached = enableAndroidTextMeasurementOptimizationsCache
    if (cached == null) {
@@ -495,6 +507,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
    return cached
  }

+  override fun enableWebPerformanceAPIsByDefault(): Boolean {
+    var cached = enableWebPerformanceAPIsByDefaultCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableWebPerformanceAPIsByDefault()
+      enableWebPerformanceAPIsByDefaultCache = cached
+    }
+    return cached
+  }
+
  override fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean {
    var cached = fixMappingOfEventPrioritiesBetweenFabricAndReactCache
    if (cached == null) {
@@ -531,6 +552,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
    return cached
  }

+  override fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean {
+    var cached = overrideBySynchronousMountPropsAtMountingAndroidCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.overrideBySynchronousMountPropsAtMountingAndroid()
+      overrideBySynchronousMountPropsAtMountingAndroidCache = cached
+    }
+    return cached
+  }
+
  override fun perfMonitorV2Enabled(): Boolean {
    var cached = perfMonitorV2EnabledCache
    if (cached == null) {
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<4410628511f112f3eef22434a05fa757>>
+ * @generated SignedSource<<5fbbabfffca4f13066ad1ab7f9462c13>>
 */

 /**
@@ -48,6 +48,8 @@ public object ReactNativeFeatureFlagsCxxInterop {

  @DoNotStrip @JvmStatic public external fun enableAccumulatedUpdatesInRawPropsAndroid(): Boolean

+  @DoNotStrip @JvmStatic public external fun enableAndroidLinearText(): Boolean
+
  @DoNotStrip @JvmStatic public external fun enableAndroidTextMeasurementOptimizations(): Boolean

  @DoNotStrip @JvmStatic public external fun enableBridgelessArchitecture(): Boolean
@@ -118,6 +120,8 @@ public object ReactNativeFeatureFlagsCxxInterop {

  @DoNotStrip @JvmStatic public external fun enableVirtualViewWindowFocusDetection(): Boolean

+  @DoNotStrip @JvmStatic public external fun enableWebPerformanceAPIsByDefault(): Boolean
+
  @DoNotStrip @JvmStatic public external fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean

  @DoNotStrip @JvmStatic public external fun fuseboxEnabledRelease(): Boolean
@@ -126,6 +130,8 @@ public object ReactNativeFeatureFlagsCxxInterop {

  @DoNotStrip @JvmStatic public external fun hideOffscreenVirtualViewsOnIOS(): Boolean

+  @DoNotStrip @JvmStatic public external fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean
+
  @DoNotStrip @JvmStatic public external fun perfMonitorV2Enabled(): Boolean

  @DoNotStrip @JvmStatic public external fun preparedTextCacheSize(): Double
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<411732d441bacbef37c3474b9041202c>>
+ * @generated SignedSource<<bcad5baef5d072b71afba69bffabdb41>>
 */

 /**
@@ -43,6 +43,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi

  override fun enableAccumulatedUpdatesInRawPropsAndroid(): Boolean = false

+  override fun enableAndroidLinearText(): Boolean = false
+
  override fun enableAndroidTextMeasurementOptimizations(): Boolean = false

  override fun enableBridgelessArchitecture(): Boolean = false
@@ -113,6 +115,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi

  override fun enableVirtualViewWindowFocusDetection(): Boolean = false

+  override fun enableWebPerformanceAPIsByDefault(): Boolean = false
+
  override fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean = false

  override fun fuseboxEnabledRelease(): Boolean = false
@@ -121,6 +125,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi

  override fun hideOffscreenVirtualViewsOnIOS(): Boolean = false

+  override fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean = false
+
  override fun perfMonitorV2Enabled(): Boolean = false

  override fun preparedTextCacheSize(): Double = 200.0
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<2f65e0e9066a8c2c35c44ea7c73dbedc>>
+ * @generated SignedSource<<0733f7a2ea498a0230bcfaa5b15a0b89>>
 */

 /**
@@ -34,6 +34,7 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
  private var disableTextLayoutManagerCacheAndroidCache: Boolean? = null
  private var enableAccessibilityOrderCache: Boolean? = null
  private var enableAccumulatedUpdatesInRawPropsAndroidCache: Boolean? = null
+  private var enableAndroidLinearTextCache: Boolean? = null
  private var enableAndroidTextMeasurementOptimizationsCache: Boolean? = null
  private var enableBridgelessArchitectureCache: Boolean? = null
  private var enableCppPropsIteratorSetterCache: Boolean? = null
@@ -69,10 +70,12 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
  private var enableVirtualViewDebugFeaturesCache: Boolean? = null
  private var enableVirtualViewRenderStateCache: Boolean? = null
  private var enableVirtualViewWindowFocusDetectionCache: Boolean? = null
+  private var enableWebPerformanceAPIsByDefaultCache: Boolean? = null
  private var fixMappingOfEventPrioritiesBetweenFabricAndReactCache: Boolean? = null
  private var fuseboxEnabledReleaseCache: Boolean? = null
  private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
  private var hideOffscreenVirtualViewsOnIOSCache: Boolean? = null
+  private var overrideBySynchronousMountPropsAtMountingAndroidCache: Boolean? = null
  private var perfMonitorV2EnabledCache: Boolean? = null
  private var preparedTextCacheSizeCache: Double? = null
  private var preventShadowTreeCommitExhaustionCache: Boolean? = null
@@ -194,6 +197,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
    return cached
  }

+  override fun enableAndroidLinearText(): Boolean {
+    var cached = enableAndroidLinearTextCache
+    if (cached == null) {
+      cached = currentProvider.enableAndroidLinearText()
+      accessedFeatureFlags.add("enableAndroidLinearText")
+      enableAndroidLinearTextCache = cached
+    }
+    return cached
+  }
+
  override fun enableAndroidTextMeasurementOptimizations(): Boolean {
    var cached = enableAndroidTextMeasurementOptimizationsCache
    if (cached == null) {
@@ -544,6 +557,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
    return cached
  }

+  override fun enableWebPerformanceAPIsByDefault(): Boolean {
+    var cached = enableWebPerformanceAPIsByDefaultCache
+    if (cached == null) {
+      cached = currentProvider.enableWebPerformanceAPIsByDefault()
+      accessedFeatureFlags.add("enableWebPerformanceAPIsByDefault")
+      enableWebPerformanceAPIsByDefaultCache = cached
+    }
+    return cached
+  }
+
  override fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean {
    var cached = fixMappingOfEventPrioritiesBetweenFabricAndReactCache
    if (cached == null) {
@@ -584,6 +607,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
    return cached
  }

+  override fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean {
+    var cached = overrideBySynchronousMountPropsAtMountingAndroidCache
+    if (cached == null) {
+      cached = currentProvider.overrideBySynchronousMountPropsAtMountingAndroid()
+      accessedFeatureFlags.add("overrideBySynchronousMountPropsAtMountingAndroid")
+      overrideBySynchronousMountPropsAtMountingAndroidCache = cached
+    }
+    return cached
+  }
+
  override fun perfMonitorV2Enabled(): Boolean {
    var cached = perfMonitorV2EnabledCache
    if (cached == null) {
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<f82b5905d822f8009c054a9443f86e39>>
+ * @generated SignedSource<<4464982256b8ce543d9235fccbf67054>>
 */

 /**
@@ -27,6 +27,8 @@ public open class ReactNativeFeatureFlagsOverrides_RNOSS_Canary_Android : ReactN

  override fun enableFabricRenderer(): Boolean = true

+  override fun enableWebPerformanceAPIsByDefault(): Boolean = true
+
  override fun useNativeViewConfigsInBridgelessMode(): Boolean = true

  override fun useTurboModuleInterop(): Boolean = true
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<e97601660cfd4f614ac934ba20ca4635>>
+ * @generated SignedSource<<a51d970a5ea4e74b7871cc9521f9edce>>
 */

 /**
@@ -43,6 +43,8 @@ public interface ReactNativeFeatureFlagsProvider {

  @DoNotStrip public fun enableAccumulatedUpdatesInRawPropsAndroid(): Boolean

+  @DoNotStrip public fun enableAndroidLinearText(): Boolean
+
  @DoNotStrip public fun enableAndroidTextMeasurementOptimizations(): Boolean

  @DoNotStrip public fun enableBridgelessArchitecture(): Boolean
@@ -113,6 +115,8 @@ public interface ReactNativeFeatureFlagsProvider {

  @DoNotStrip public fun enableVirtualViewWindowFocusDetection(): Boolean

+  @DoNotStrip public fun enableWebPerformanceAPIsByDefault(): Boolean
+
  @DoNotStrip public fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean

  @DoNotStrip public fun fuseboxEnabledRelease(): Boolean
@@ -121,6 +125,8 @@ public interface ReactNativeFeatureFlagsProvider {

  @DoNotStrip public fun hideOffscreenVirtualViewsOnIOS(): Boolean

+  @DoNotStrip public fun overrideBySynchronousMountPropsAtMountingAndroid(): Boolean
+
  @DoNotStrip public fun perfMonitorV2Enabled(): Boolean

  @DoNotStrip public fun preparedTextCacheSize(): Double
@@ -310,8 +310,8 @@ public open class JavaTimerManager(
          }
        }
      }
-      timersToCall?.let {
-        javaScriptTimerExecutor.callTimers(it)
+      timersToCall?.let { timers ->
+        javaScriptTimerExecutor.callTimers(timers)
        timersToCall = null
      }
      reactChoreographer.postFrameCallback(ReactChoreographer.CallbackType.TIMERS_EVENTS, this)
@@ -81,6 +81,6 @@ internal class ReactHostImplDevHelper(private val delegate: ReactHostImpl) :
      delegate.loadBundle(bundleLoader)

  override fun getTracingState(): TracingState {
-    return delegate.reactHostInspectorTarget?.tracingState() ?: TracingState.DISABLED
+    return delegate.reactHostInspectorTarget?.getTracingState() ?: TracingState.ENABLEDINCDPMODE
  }
 }
@@ -43,7 +43,7 @@ internal class ReactHostInspectorTarget(reactHostImpl: ReactHostImpl) :

  external fun tracingStateAsInt(): Int

-  fun tracingState(): TracingState {
+  override fun getTracingState(): TracingState {
    return TracingState.entries[tracingStateAsInt()]
  }

@@ -65,18 +65,6 @@ internal class ReactHostInspectorTarget(reactHostImpl: ReactHostImpl) :
    }
  }

-  fun handleNativePerfMonitorMetricUpdate(
-      longTaskDurationMs: Int,
-      responsivenessScore: Int,
-      ttl: Int,
-  ) {
-    perfMonitorListeners.forEach { listener ->
-      listener.onNewFocusedEvent(
-          PerfMonitorUpdateListener.LongTaskEventData(longTaskDurationMs, responsivenessScore, ttl)
-      )
-    }
-  }
-
  override fun close() {
    mHybridData.resetNative()
  }
@@ -245,7 +245,15 @@ public object ReactScrollViewHelper {
  @RequiresApi(Build.VERSION_CODES.N)
  @JvmStatic
  public fun removeScrollListener(listener: ScrollListener) {
-    scrollListeners.removeIf { it.get() == null || it.get() == listener }
+    // Avoid using removeIf, only available in API 26+
+    val toRemove = ArrayList<WeakReference<ScrollListener>>()
+    for (ref in scrollListeners) {
+      val target = ref.get()
+      if (target == null || target == listener) {
+        toRemove.add(ref)
+      }
+    }
+    scrollListeners.removeAll(toRemove)
  }

  @JvmStatic
@@ -256,7 +264,15 @@ public object ReactScrollViewHelper {
  @RequiresApi(Build.VERSION_CODES.N)
  @JvmStatic
  public fun removeLayoutChangeListener(listener: LayoutChangeListener) {
-    layoutChangeListeners.removeIf { it.get() == null || it.get() == listener }
+    // Avoid using removeIf, only available in API 26+
+    val toRemove = ArrayList<WeakReference<LayoutChangeListener>>()
+    for (ref in layoutChangeListeners) {
+      val target = ref.get()
+      if (target == null || target == listener) {
+        toRemove.add(ref)
+      }
+    }
+    layoutChangeListeners.removeAll(toRemove)
  }

  /**
@@ -14,6 +14,7 @@ import android.text.TextPaint
 import android.text.style.MetricAffectingSpan
 import com.facebook.react.common.ReactConstants
 import com.facebook.react.common.assets.ReactFontManager
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
 import com.facebook.react.views.text.ReactTypefaceUtils

 /**
@@ -73,6 +74,9 @@ internal class CustomStyleSpan(
        fontFeatureSettings = fontFeatureSettingsParam
        setTypeface(typeface)
        isSubpixelText = true
+        if (ReactNativeFeatureFlags.enableAndroidLinearText()) {
+          isLinearText = true
+        }
      }
    }
  }
@@ -611,17 +611,26 @@ public open class ReactEditText public constructor(context: Context) : AppCompat

    // Match behavior of CustomStyleSpan and enable SUBPIXEL_TEXT_FLAG when setting anything
    // nonstandard
+    val enableSubpixelText =
+        fontStyle != ReactConstants.UNSET ||
+            fontWeight != ReactConstants.UNSET ||
+            fontFamily != null ||
+            fontFeatureSettings != null
    paintFlags =
-        if (
-            fontStyle != ReactConstants.UNSET ||
-                fontWeight != ReactConstants.UNSET ||
-                fontFamily != null ||
-                fontFeatureSettings != null
-        ) {
+        if (enableSubpixelText) {
          paintFlags or Paint.SUBPIXEL_TEXT_FLAG
        } else {
-          paintFlags and (Paint.SUBPIXEL_TEXT_FLAG.inv())
+          paintFlags and Paint.SUBPIXEL_TEXT_FLAG.inv()
        }
+
+    if (ReactNativeFeatureFlags.enableAndroidLinearText()) {
+      paintFlags =
+          if (enableSubpixelText) {
+            paintFlags or Paint.LINEAR_TEXT_FLAG
+          } else {
+            paintFlags and Paint.LINEAR_TEXT_FLAG.inv()
+          }
+    }
  }

  public fun requestFocusFromJS() {
@@ -124,6 +124,8 @@ add_react_common_subdir(react/nativemodule/dom)
 add_react_common_subdir(react/nativemodule/featureflags)
 add_react_common_subdir(react/nativemodule/microtasks)
 add_react_common_subdir(react/nativemodule/idlecallbacks)
+add_react_common_subdir(react/nativemodule/webperformance)
+add_react_common_subdir(react/networking)
 add_react_common_subdir(jserrorhandler)
 add_react_common_subdir(react/runtime)
 add_react_common_subdir(react/runtime/hermes)
@@ -190,6 +192,8 @@ add_library(reactnative
          $<TARGET_OBJECTS:react_nativemodule_featureflags>
          $<TARGET_OBJECTS:react_nativemodule_idlecallbacks>
          $<TARGET_OBJECTS:react_nativemodule_microtasks>
+          $<TARGET_OBJECTS:react_nativemodule_webperformance>
+          $<TARGET_OBJECTS:react_networking>
          $<TARGET_OBJECTS:react_newarchdefaults>
          $<TARGET_OBJECTS:react_performance_cdpmetrics>
          $<TARGET_OBJECTS:react_performance_timeline>
@@ -279,6 +283,8 @@ target_include_directories(reactnative
        $<TARGET_PROPERTY:react_nativemodule_featureflags,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_nativemodule_idlecallbacks,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_nativemodule_microtasks,INTERFACE_INCLUDE_DIRECTORIES>
+        $<TARGET_PROPERTY:react_nativemodule_webperformance,INTERFACE_INCLUDE_DIRECTORIES>
+        $<TARGET_PROPERTY:react_networking,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_newarchdefaults,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_performance_cdpmetrics,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_performance_timeline,INTERFACE_INCLUDE_DIRECTORIES>
@@ -20,6 +20,6 @@ target_include_directories(react_devsupportjni PUBLIC .)
 target_link_libraries(react_devsupportjni
        fbjni
        jsinspector
-        jsinspector_network)
+        react_networking)

 target_compile_reactnative_options(react_devsupportjni PRIVATE)
@@ -7,7 +7,7 @@

 #include "JInspectorNetworkReporter.h"

-#include <jsinspector-modern/network/NetworkReporter.h>
+#include <react/networking/NetworkReporter.h>

 #include <cstddef>
 #include <string>
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<f9c4f8d97edff1b016873b0a6121b76b>>
+ * @generated SignedSource<<b3357ac501bc00f026a3a7ed90c83ba3>>
 */

 /**
@@ -99,6 +99,12 @@ class ReactNativeFeatureFlagsJavaProvider
    return method(javaProvider_);
  }

+  bool enableAndroidLinearText() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableAndroidLinearText");
+    return method(javaProvider_);
+  }
+
  bool enableAndroidTextMeasurementOptimizations() override {
    static const auto method =
        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableAndroidTextMeasurementOptimizations");
@@ -309,6 +315,12 @@ class ReactNativeFeatureFlagsJavaProvider
    return method(javaProvider_);
  }

+  bool enableWebPerformanceAPIsByDefault() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableWebPerformanceAPIsByDefault");
+    return method(javaProvider_);
+  }
+
  bool fixMappingOfEventPrioritiesBetweenFabricAndReact() override {
    static const auto method =
        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("fixMappingOfEventPrioritiesBetweenFabricAndReact");
@@ -333,6 +345,12 @@ class ReactNativeFeatureFlagsJavaProvider
    return method(javaProvider_);
  }

+  bool overrideBySynchronousMountPropsAtMountingAndroid() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("overrideBySynchronousMountPropsAtMountingAndroid");
+    return method(javaProvider_);
+  }
+
  bool perfMonitorV2Enabled() override {
    static const auto method =
        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("perfMonitorV2Enabled");
@@ -507,6 +525,11 @@ bool JReactNativeFeatureFlagsCxxInterop::enableAccumulatedUpdatesInRawPropsAndro
  return ReactNativeFeatureFlags::enableAccumulatedUpdatesInRawPropsAndroid();
 }

+bool JReactNativeFeatureFlagsCxxInterop::enableAndroidLinearText(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableAndroidLinearText();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::enableAndroidTextMeasurementOptimizations(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
  return ReactNativeFeatureFlags::enableAndroidTextMeasurementOptimizations();
@@ -682,6 +705,11 @@ bool JReactNativeFeatureFlagsCxxInterop::enableVirtualViewWindowFocusDetection(
  return ReactNativeFeatureFlags::enableVirtualViewWindowFocusDetection();
 }

+bool JReactNativeFeatureFlagsCxxInterop::enableWebPerformanceAPIsByDefault(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableWebPerformanceAPIsByDefault();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::fixMappingOfEventPrioritiesBetweenFabricAndReact(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
  return ReactNativeFeatureFlags::fixMappingOfEventPrioritiesBetweenFabricAndReact();
@@ -702,6 +730,11 @@ bool JReactNativeFeatureFlagsCxxInterop::hideOffscreenVirtualViewsOnIOS(
  return ReactNativeFeatureFlags::hideOffscreenVirtualViewsOnIOS();
 }

+bool JReactNativeFeatureFlagsCxxInterop::overrideBySynchronousMountPropsAtMountingAndroid(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::overrideBySynchronousMountPropsAtMountingAndroid();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::perfMonitorV2Enabled(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
  return ReactNativeFeatureFlags::perfMonitorV2Enabled();
@@ -863,6 +896,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
      makeNativeMethod(
        "enableAccumulatedUpdatesInRawPropsAndroid",
        JReactNativeFeatureFlagsCxxInterop::enableAccumulatedUpdatesInRawPropsAndroid),
+      makeNativeMethod(
+        "enableAndroidLinearText",
+        JReactNativeFeatureFlagsCxxInterop::enableAndroidLinearText),
      makeNativeMethod(
        "enableAndroidTextMeasurementOptimizations",
        JReactNativeFeatureFlagsCxxInterop::enableAndroidTextMeasurementOptimizations),
@@ -968,6 +1004,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
      makeNativeMethod(
        "enableVirtualViewWindowFocusDetection",
        JReactNativeFeatureFlagsCxxInterop::enableVirtualViewWindowFocusDetection),
+      makeNativeMethod(
+        "enableWebPerformanceAPIsByDefault",
+        JReactNativeFeatureFlagsCxxInterop::enableWebPerformanceAPIsByDefault),
      makeNativeMethod(
        "fixMappingOfEventPrioritiesBetweenFabricAndReact",
        JReactNativeFeatureFlagsCxxInterop::fixMappingOfEventPrioritiesBetweenFabricAndReact),
@@ -980,6 +1019,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
      makeNativeMethod(
        "hideOffscreenVirtualViewsOnIOS",
        JReactNativeFeatureFlagsCxxInterop::hideOffscreenVirtualViewsOnIOS),
+      makeNativeMethod(
+        "overrideBySynchronousMountPropsAtMountingAndroid",
+        JReactNativeFeatureFlagsCxxInterop::overrideBySynchronousMountPropsAtMountingAndroid),
      makeNativeMethod(
        "perfMonitorV2Enabled",
        JReactNativeFeatureFlagsCxxInterop::perfMonitorV2Enabled),
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<6a98f8398948f8d56e51d3eff19c5d05>>
+ * @generated SignedSource<<2c969005f4c7bb24f98bf4e3ed3dc0e9>>
 */

 /**
@@ -60,6 +60,9 @@ class JReactNativeFeatureFlagsCxxInterop
  static bool enableAccumulatedUpdatesInRawPropsAndroid(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

+  static bool enableAndroidLinearText(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
  static bool enableAndroidTextMeasurementOptimizations(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

@@ -165,6 +168,9 @@ class JReactNativeFeatureFlagsCxxInterop
  static bool enableVirtualViewWindowFocusDetection(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

+  static bool enableWebPerformanceAPIsByDefault(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
  static bool fixMappingOfEventPrioritiesBetweenFabricAndReact(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

@@ -177,6 +183,9 @@ class JReactNativeFeatureFlagsCxxInterop
  static bool hideOffscreenVirtualViewsOnIOS(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

+  static bool overrideBySynchronousMountPropsAtMountingAndroid(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
  static bool perfMonitorV2Enabled(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

@@ -28,7 +28,7 @@ target_compile_reactnative_options(hermes_executor PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(hermes_executor PRIVATE -DHERMES_ENABLE_DEBUGGER=1)

-  if (DEFINED HERMES_V1_ENABLED)
+  if (HERMES_V1_ENABLED)
        target_compile_options(hermes_executor PRIVATE -DHERMES_V1_ENABLED=1)
  endif()
 endif()
@@ -30,7 +30,7 @@ target_compile_reactnative_options(hermesinstancejni PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(hermesinstancejni PRIVATE -DHERMES_ENABLE_DEBUGGER=1)

-  if (DEFINED HERMES_V1_ENABLED)
+  if (HERMES_V1_ENABLED)
        target_compile_options(hermesinstancejni PRIVATE -DHERMES_V1_ENABLED=1)
  endif()
 endif ()
@@ -20,7 +20,7 @@ target_compile_reactnative_options(rninstance PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(rninstance PRIVATE -DHERMES_ENABLE_DEBUGGER=1)

-  if (DEFINED HERMES_V1_ENABLED)
+  if (HERMES_V1_ENABLED)
        target_compile_options(rninstance PRIVATE -DHERMES_V1_ENABLED=1)
  endif()
 endif ()
@@ -120,17 +120,6 @@ void JReactHostInspectorTarget::onSetPausedInDebuggerMessage(
  }
 }

-void JReactHostInspectorTarget::unstable_onPerfMonitorUpdate(
-    const PerfMonitorUpdateRequest& request) {
-  static auto method = javaClassStatic()->getMethod<void(jint, jint, jint)>(
-      "handleNativePerfMonitorMetricUpdate");
-  method(
-      jobj_,
-      request.activeInteraction.duration,
-      static_cast<jint>(request.activeInteraction.responsivenessScore),
-      request.activeInteraction.ttl);
-}
-
 void JReactHostInspectorTarget::loadNetworkResource(
    const jsinspector_modern::LoadNetworkResourceRequest& params,
    jsinspector_modern::ScopedExecutor<
@@ -113,8 +113,6 @@ class JReactHostInspectorTarget
  void onReload(const PageReloadRequest& request) override;
  void onSetPausedInDebuggerMessage(
      const OverlaySetPausedInDebuggerMessageRequest& request) override;
-  void unstable_onPerfMonitorUpdate(
-      const jsinspector_modern::PerfMonitorUpdateRequest& request) override;
  void loadNetworkResource(
      const jsinspector_modern::LoadNetworkResourceRequest& params,
      jsinspector_modern::ScopedExecutor<
@@ -33,7 +33,7 @@ if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
                -DHERMES_ENABLE_DEBUGGER=1
        )

-        if (DEFINED HERMES_V1_ENABLED)
+        if (HERMES_V1_ENABLED)
                target_compile_options(hermes_executor_common PRIVATE -DHERMES_V1_ENABLED=1)
        endif()
 else()
@@ -24,7 +24,7 @@ if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
                -DHERMES_ENABLE_DEBUGGER=1
        )

-        if (DEFINED HERMES_V1_ENABLED)
+        if (HERMES_V1_ENABLED)
                target_compile_options(hermes_inspector_modern PRIVATE -DHERMES_V1_ENABLED=1)
        endif()
 endif()
@@ -192,9 +192,6 @@ std::shared_ptr<HostTarget> HostTarget::create(
    VoidExecutor executor) {
  std::shared_ptr<HostTarget> hostTarget{new HostTarget(delegate)};
  hostTarget->setExecutor(std::move(executor));
-  if (InspectorFlags::getInstance().getPerfMonitorV2Enabled()) {
-    hostTarget->installPerfMetricsBinding();
-  }
  return hostTarget;
 }

@@ -279,17 +276,6 @@ void HostTarget::sendCommand(HostCommand command) {
  });
 }

-void HostTarget::installPerfMetricsBinding() {
-  perfMonitorUpdateHandler_ =
-      std::make_unique<PerfMonitorUpdateHandler>(delegate_);
-  perfMetricsBinding_ = std::make_unique<HostRuntimeBinding>(
-      *this, // Used immediately
-      "__chromium_devtools_metrics_reporter",
-      [this](const std::string& message) {
-        perfMonitorUpdateHandler_->handlePerfMetricsUpdate(message);
-      });
-}
-
 HostTargetController::HostTargetController(HostTarget& target)
    : target_(target) {}

@@ -12,7 +12,6 @@
 #include "InspectorInterfaces.h"
 #include "InstanceTarget.h"
 #include "NetworkIOAgent.h"
-#include "PerfMonitorV2.h"
 #include "ScopedExecutor.h"
 #include "WeakList.h"

@@ -128,13 +127,6 @@ class HostTargetDelegate : public LoadNetworkResourceDelegate {
  virtual void onSetPausedInDebuggerMessage(
      const OverlaySetPausedInDebuggerMessageRequest& request) = 0;

-  /**
-   * [Experimental] Called when the runtime has new data for the V2 Perf
-   * Monitor overlay. This is called on the inspector thread.
-   */
-  virtual void unstable_onPerfMonitorUpdate(
-      const PerfMonitorUpdateRequest& /*request*/) {}
-
  /**
   * Called by NetworkIOAgent on handling a `Network.loadNetworkResource` CDP
   * request. Platform implementations should override this to perform a
@@ -324,7 +316,6 @@ class JSINSPECTOR_EXPORT HostTarget
  std::shared_ptr<ExecutionContextManager> executionContextManager_;
  std::shared_ptr<InstanceTarget> currentInstance_{nullptr};
  std::unique_ptr<HostCommandSender> commandSender_;
-  std::unique_ptr<PerfMonitorUpdateHandler> perfMonitorUpdateHandler_;
  std::unique_ptr<HostRuntimeBinding> perfMetricsBinding_;

  /**
@@ -343,13 +334,6 @@ class JSINSPECTOR_EXPORT HostTarget
    return currentInstance_ != nullptr;
  }

-  /**
-   * Install a runtime binding subscribing to the Interaction to Next Paint
-   * (INP) live metric, which we broadcast to the V2 Perf Monitor overlay
-   * via \ref HostTargetDelegate::unstable_onPerfMonitorUpdate.
-   */
-  void installPerfMetricsBinding();
-
  // Necessary to allow HostAgent to access HostTarget's internals in a
  // controlled way (i.e. only HostTargetController gets friend access, while
  // HostAgent itself doesn't).
@@ -33,10 +33,6 @@ bool InspectorFlags::getNetworkInspectionEnabled() const {
  return loadFlagsAndAssertUnchanged().networkInspectionEnabled;
 }

-bool InspectorFlags::getPerfMonitorV2Enabled() const {
-  return loadFlagsAndAssertUnchanged().perfMonitorV2Enabled;
-}
-
 void InspectorFlags::dangerouslyResetFlags() {
  *this = InspectorFlags{};
 }
@@ -63,9 +59,6 @@ const InspectorFlags::Values& InspectorFlags::loadFlagsAndAssertUnchanged()
      .networkInspectionEnabled =
          ReactNativeFeatureFlags::enableBridgelessArchitecture() &&
          ReactNativeFeatureFlags::fuseboxNetworkInspectionEnabled(),
-      .perfMonitorV2Enabled =
-          ReactNativeFeatureFlags::enableBridgelessArchitecture() &&
-          ReactNativeFeatureFlags::perfMonitorV2Enabled(),
  };

  if (cachedValues_.has_value() && !inconsistentFlagsStateLogged_) {
@@ -35,11 +35,6 @@ class InspectorFlags {
   */
  bool getNetworkInspectionEnabled() const;

-  /**
-   * Flag determining if the V2 in-app Performance Monitor is enabled.
-   */
-  bool getPerfMonitorV2Enabled() const;
-
  /**
   * Forcibly disable the main `getFuseboxEnabled()` flag. This should ONLY be
   * used by `ReactInstanceIntegrationTest`.
@@ -57,7 +52,6 @@ class InspectorFlags {
    bool fuseboxEnabled;
    bool isProfilingBuild;
    bool networkInspectionEnabled;
-    bool perfMonitorV2Enabled;
    bool operator==(const Values&) const = default;
  };

@@ -11,7 +11,7 @@
 #include "Base64.h"
 #include "Utf8.h"

-#include <jsinspector-modern/network/NetworkReporter.h>
+#include <jsinspector-modern/network/NetworkHandler.h>

 #include <sstream>
 #include <tuple>
@@ -272,19 +272,19 @@ bool NetworkIOAgent::handleRequest(
  }

  if (InspectorFlags::getInstance().getNetworkInspectionEnabled()) {
-    auto& networkReporter = NetworkReporter::getInstance();
+    auto& networkHandler = NetworkHandler::getInstance();

    // @cdp Network.enable support is experimental.
    if (req.method == "Network.enable") {
-      networkReporter.setFrontendChannel(frontendChannel_);
-      networkReporter.enableDebugging();
+      networkHandler.setFrontendChannel(frontendChannel_);
+      networkHandler.enable();
      frontendChannel_(cdp::jsonResult(req.id));
      return true;
    }

    // @cdp Network.disable support is experimental.
    if (req.method == "Network.disable") {
-      networkReporter.disableDebugging();
+      networkHandler.disable();
      frontendChannel_(cdp::jsonResult(req.id));
      return true;
    }
@@ -497,9 +497,9 @@ void NetworkIOAgent::handleGetResponseBody(const cdp::PreparsedRequest& req) {
    return;
  }

-  auto& networkReporter = NetworkReporter::getInstance();
+  auto& networkHandler = NetworkHandler::getInstance();

-  if (!networkReporter.isDebuggingEnabled()) {
+  if (!networkHandler.isEnabled()) {
    frontendChannel_(cdp::jsonError(
        requestId,
        cdp::ErrorCode::InvalidRequest,
@@ -508,7 +508,7 @@ void NetworkIOAgent::handleGetResponseBody(const cdp::PreparsedRequest& req) {
  }

  auto storedResponse =
-      networkReporter.getResponseBody(req.params.at("requestId").asString());
+      networkHandler.getResponseBody(req.params.at("requestId").asString());

  if (!storedResponse) {
    frontendChannel_(cdp::jsonError(
@@ -1,91 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-#include "PerfMonitorV2.h"
-#include "HostTarget.h"
-
-#include <folly/json.h>
-#include <react/timing/primitives.h>
-
-namespace facebook::react::jsinspector_modern {
-
-namespace {
-
-constexpr uint16_t MIN_DURATION = 200;
-constexpr uint16_t DEFAULT_TTL = 4000;
-constexpr uint16_t BAD_EVENT_TTL = 20000;
-
-InteractionResponsivenessScore getInteractionScore(uint16_t duration) {
-  constexpr uint16_t GOOD_THRESHOLD = 200;
-  constexpr uint16_t NEEDS_IMPROVEMENT_THRESHOLD = 500;
-
-  if (duration < GOOD_THRESHOLD) {
-    return InteractionResponsivenessScore::Good;
-  } else if (duration < NEEDS_IMPROVEMENT_THRESHOLD) {
-    return InteractionResponsivenessScore::NeedsImprovement;
-  } else {
-    return InteractionResponsivenessScore::Poor;
-  }
-}
-
-} // namespace
-
-void PerfMonitorUpdateHandler::handlePerfMetricsUpdate(
-    const std::string& message) {
-  auto payload = folly::parseJson(message);
-
-  if (payload.isObject()) {
-    if (payload["name"] != "__ReactNative__LongTask") {
-      return;
-    }
-
-    auto duration = static_cast<uint16_t>(payload["duration"].asInt());
-
-    if (duration < MIN_DURATION) {
-      return;
-    }
-
-    auto responsivenessScore = getInteractionScore(duration);
-    auto ttl = responsivenessScore == InteractionResponsivenessScore::Poor
-        ? BAD_EVENT_TTL
-        : DEFAULT_TTL;
-
-    LongTaskPayload newEvent{
-        static_cast<uint16_t>(payload["startTime"].asInt()),
-        duration,
-        responsivenessScore,
-        ttl};
-
-    if (shouldOverrideLastEvent(newEvent)) {
-      lastEvent_ = newEvent;
-      delegate_.unstable_onPerfMonitorUpdate(
-          PerfMonitorUpdateRequest{newEvent});
-    }
-  }
-}
-
-bool PerfMonitorUpdateHandler::shouldOverrideLastEvent(
-    const LongTaskPayload& newEvent) {
-  if (!lastEvent_) {
-    return true;
-  }
-
-  // Override if last event has expired
-  if (HighResTimeStamp::now().toDOMHighResTimeStamp() >
-      lastEvent_->startTime + lastEvent_->ttl) {
-    return true;
-  }
-
-  // Override if same or greater responsiveness score
-  if (newEvent.responsivenessScore >= lastEvent_->responsivenessScore) {
-    return true;
-  }
-
-  return false;
-}
-
-} // namespace facebook::react::jsinspector_modern
@@ -1,59 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-#pragma once
-
-#include <cstdint>
-#include <optional>
-#include <string>
-
-namespace facebook::react::jsinspector_modern {
-
-class HostTargetDelegate;
-
-/**
- * See https://web.dev/articles/inp#good-score.
- */
-enum class InteractionResponsivenessScore : int32_t {
-  Good = 0,
-  NeedsImprovement = 1,
-  Poor = 2
-};
-
-struct LongTaskPayload {
-  uint16_t startTime;
-  uint16_t duration;
-  InteractionResponsivenessScore responsivenessScore;
-  uint16_t ttl;
-};
-
-struct PerfMonitorUpdateRequest {
-  LongTaskPayload activeInteraction;
-};
-
-/**
- * [Experimental] Utility to handle performance metrics updates received from
- * the runtime and forward update events to the V2 Perf Monitor UI.
- */
-class PerfMonitorUpdateHandler {
- public:
-  explicit PerfMonitorUpdateHandler(HostTargetDelegate& delegate)
-      : delegate_(delegate) {}
-
-  /**
-   * Handle a new "__chromium_devtools_metrics_reporter" message.
-   */
-  void handlePerfMetricsUpdate(const std::string& message);
-
- private:
-  HostTargetDelegate& delegate_;
-  std::optional<LongTaskPayload> lastEvent_;
-
-  bool shouldOverrideLastEvent(const LongTaskPayload& newInteraction);
-};
-
-} // namespace facebook::react::jsinspector_modern
@@ -24,6 +24,4 @@ target_include_directories(jsinspector_network PUBLIC ${REACT_COMMON_DIR})
 target_link_libraries(jsinspector_network
        folly_runtime
        glog
-        jsinspector_cdp
-        react_performance_timeline
-        react_timing)
+        jsinspector_cdp)
@@ -27,15 +27,6 @@ folly::dynamic headersToDynamic(const std::optional<Headers>& headers) {

 } // namespace

-/* static */ Request Request::fromInputParams(const RequestInfo& requestInfo) {
-  return {
-      .url = requestInfo.url,
-      .method = requestInfo.httpMethod,
-      .headers = requestInfo.headers,
-      .postData = requestInfo.httpBody,
-  };
-}
-
 folly::dynamic Request::toDynamic() const {
  folly::dynamic result = folly::dynamic::object;

@@ -48,16 +39,16 @@ folly::dynamic Request::toDynamic() const {
 }

 /* static */ Response Response::fromInputParams(
-    const ResponseInfo& responseInfo,
+    const std::string& url,
+    uint16_t status,
+    const std::optional<Headers>& headers,
    int encodedDataLength) {
-  auto headers = responseInfo.headers.value_or(Headers());
-
  return {
-      .url = responseInfo.url,
-      .status = responseInfo.statusCode,
-      .statusText = httpReasonPhrase(responseInfo.statusCode),
+      .url = url,
+      .status = status,
+      .statusText = httpReasonPhrase(status),
      .headers = headers,
-      .mimeType = mimeTypeFromHeaders(headers),
+      .mimeType = mimeTypeFromHeaders(headers.value_or(Headers())),
      .encodedDataLength = encodedDataLength,
  };
 }
--- a/Show More
+++ b/Show More