Mark mOnViewAttachMountItems as final in SurfaceMountingManager.java (#54344)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/54344

Changelog: [Internal]

Reviewed By: mdvacca

Differential Revision: D85904478

fbshipit-source-id: 961d12bf1cbf04b9087a518531b20d87be3ccb63

.editorconfig

@@ -9,12 +9,3 @@ end_of_line = lf
 insert_final_newline = true
 indent_style = space
 indent_size = 2
-
-[*.gradle]
-indent_size = 4
-
-[*.kts]
-indent_size = 4
-
-[BUCK]
-indent_size = 4

.eslintignore

@@ -13,7 +13,6 @@ packages/*/dist
 packages/*/types_generated
 packages/debugger-frontend/dist/**/*
 packages/react-native-codegen/lib
-tools/eslint/rules/sort-imports.js
 **/Pods/*
 **/*.macos.js
 **/*.windows.js

.eslintrc.js

@@ -4,21 +4,18 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @noflow
  * @format
  */
 
 'use strict';
 
-const path = require('node:path');
-
-require('eslint-plugin-lint').load(path.join(__dirname, 'tools/eslint/rules'));
-
 module.exports = {
   root: true,
 
   extends: ['@react-native'],
 
-  plugins: ['@react-native/eslint-plugin-specs', 'lint'],
+  plugins: ['@react-native/monorepo', '@react-native/specs'],
 
   overrides: [
     // overriding the JS config from @react-native/eslint-config to ensure
@@ -27,28 +24,37 @@ module.exports = {
       files: ['*.js', '*.js.flow', '*.jsx'],
       parser: 'hermes-eslint',
       rules: {
+        '@react-native/monorepo/sort-imports': 'warn',
+        'eslint-comments/no-unlimited-disable': 'off',
+        'ft-flow/require-valid-file-annotation': ['error', 'always'],
+        'no-extra-boolean-cast': 'off',
+        'no-void': 'off',
         // These rules are not required with hermes-eslint
-        'ft-flow/define-flow-type': 0,
-        'ft-flow/use-flow-type': 0,
-        'lint/sort-imports': 1,
-        // flow handles this check for us, so it's not required
-        'no-undef': 0,
+        'ft-flow/define-flow-type': 'off',
+        'ft-flow/use-flow-type': 'off',
+        // Flow handles these checks for us, so they aren't required
+        'no-undef': 'off',
+        'no-unreachable': 'off',
+        // Throwing from function or rejecting promises with non-error values could result in unclear error stack traces and lead to harder debugging
+        'prefer-promise-reject-errors': 'error',
+        'no-throw-literal': 'error',
       },
     },
     {
       files: ['*.js', '*.jsx', '*.ts', '*.tsx'],
       rules: {
-        '@react-native/no-deep-imports': 0,
+        '@react-native/no-deep-imports': 'off',
       },
     },
     {
       files: [
-        './packages/react-native/**/*.{js,flow}',
+        './packages/react-native/Libraries/**/*.{js,flow}',
+        './packages/react-native/src/**/*.{js,flow}',
         './packages/assets/registry.js',
       ],
       parser: 'hermes-eslint',
       rules: {
-        'lint/no-commonjs-exports': 1,
+        '@react-native/monorepo/no-commonjs-exports': 'warn',
       },
     },
     {
@@ -58,15 +64,17 @@ module.exports = {
     {
       files: ['package.json'],
       rules: {
-        'lint/react-native-manifest': 2,
+        '@react-native/monorepo/react-native-manifest': 'error',
       },
     },
     {
-      files: ['flow-typed/**/*.js'],
+      files: ['flow-typed/**/*.js', 'packages/react-native/flow/**/*'],
       rules: {
-        'lint/valid-flow-typed-signature': 2,
-        'no-unused-vars': 0,
-        quotes: 0,
+        '@react-native/monorepo/valid-flow-typed-signature': 'error',
+        'ft-flow/require-valid-file-annotation': 'off',
+        'no-shadow': 'off',
+        'no-unused-vars': 'off',
+        quotes: 'off',
       },
     },
     {
@@ -75,14 +83,14 @@ module.exports = {
         'packages/react-native/src/**/*.js',
       ],
       rules: {
-        '@react-native/platform-colors': 2,
-        '@react-native/specs/react-native-modules': 2,
-        'lint/no-haste-imports': 2,
-        'lint/no-react-native-imports': 2,
-        'lint/require-extends-error': 2,
-        'lint/no-react-node-imports': 2,
-        'lint/no-react-default-imports': 2,
-        'lint/no-react-named-type-imports': 2,
+        '@react-native/monorepo/no-haste-imports': 'error',
+        '@react-native/monorepo/no-react-default-imports': 'error',
+        '@react-native/monorepo/no-react-named-type-imports': 'error',
+        '@react-native/monorepo/no-react-native-imports': 'error',
+        '@react-native/monorepo/no-react-node-imports': 'error',
+        '@react-native/monorepo/require-extends-error': 'error',
+        '@react-native/platform-colors': 'error',
+        '@react-native/specs/react-native-modules': 'error',
       },
     },
     {
@@ -134,9 +142,9 @@ module.exports = {
       },
     },
     {
-      files: ['**/*-itest{.fb,}.js'],
+      files: ['**/__tests__/**'],
       rules: {
-        'lint/no-react-native-imports': 'off',
+        '@react-native/monorepo/no-react-native-imports': 'off',
       },
     },
   ],

.flowconfig

@@ -2,11 +2,14 @@
 ; Ignore build cache folder
 <PROJECT_ROOT>/packages/react-native/sdks/.*
 
+; Ignore fb_internal modules
+<PROJECT_ROOT>/packages/react-native/src/fb_internal/.*
+
 ; Ignore the codegen e2e tests
 <PROJECT_ROOT>/packages/react-native-codegen/e2e/__test_fixtures__/modules/NativeEnumTurboModule.js
 
 ; Ignore the Dangerfile
-<PROJECT_ROOT>/packages/react-native-bots/dangerfile.js
+<PROJECT_ROOT>/private/react-native-bots/dangerfile.js
 
 ; Ignore "BUCK" generated dirs
 <PROJECT_ROOT>/\.buckd/
@@ -24,7 +27,7 @@
 <PROJECT_ROOT>/packages/.*/dist
 
 ; helloworld
-<PROJECT_ROOT>/packages/helloworld/ios/Pods/
+<PROJECT_ROOT>/private/helloworld/ios/Pods/
 
 ; Ignore rn-tester Pods
 <PROJECT_ROOT>/packages/rn-tester/Pods/
@@ -41,11 +44,12 @@
 flow-typed/
 packages/react-native/interface.js
 packages/react-native/flow/
-packages/react-native/src/types/
 
 [options]
 enums=true
+experimental.pattern_matching=true
 casting_syntax=both
+component_syntax=true
 
 emoji=true
 
@@ -65,16 +69,12 @@ munge_underscores=true
 module.name_mapper='^react-native$' -> '<PROJECT_ROOT>/packages/react-native/index.js'
 module.name_mapper='^react-native/\(.*\)$' -> '<PROJECT_ROOT>/packages/react-native/\1'
 module.name_mapper='^@react-native/dev-middleware$' -> '<PROJECT_ROOT>/packages/dev-middleware'
-module.name_mapper='^@?[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\|xml\)$' -> '<PROJECT_ROOT>/packages/react-native/Libraries/Image/RelativeImageStub'
+module.name_mapper='^@?[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\|xml\|ktx\)$' -> '<PROJECT_ROOT>/packages/react-native/Libraries/Image/RelativeImageStub'
+
+module.system.haste.module_ref_prefix=m#
 
 react.runtime=automatic
 
-suppress_type=$FlowIssue
-suppress_type=$FlowFixMe
-suppress_type=$FlowFixMeProps
-suppress_type=$FlowFixMeState
-suppress_type=$FlowFixMeEmpty
-
 ban_spread_key_props=true
 
 [lints]
@@ -98,4 +98,4 @@ untyped-import
 untyped-type-import
 
 [version]
-^0.268.0
+^0.289.0

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -83,7 +83,7 @@ body:
             path: /bin/zsh
         Binaries:
           Node: ...
-            version: 18.14.0
+            version: 22.14.0
         ...
       render: text
     validations:

.github/ISSUE_TEMPLATE/debugger_bug_report.yml

@@ -1,6 +1,6 @@
 name: 🔍 Debugger - Bug Report
 description: Report a bug with React Native DevTools and the New Debugger
-labels: ["Needs: Triage :mag:", "Debugger"]
+labels: ["Needs: Triage :mag:", "Debugging"]
 
 body:
   - type: markdown
@@ -62,7 +62,7 @@ body:
             path: /bin/zsh
         Binaries:
           Node: ...
-            version: 18.14.0
+            version: 22.14.0
         ...
       render: text
     validations:

.github/ISSUE_TEMPLATE/new_architecture_bug_report.yml

@@ -95,7 +95,7 @@ body:
             path: /bin/zsh
         Binaries:
           Node: ...
-            version: 18.14.0
+            version: 22.14.0
         ...
       render: text
     validations:

.github/actions/build-android/action.yml

@@ -4,9 +4,6 @@ inputs:
   release-type:
     required: true
     description: The type of release we are building. It could be nightly, release or dry-run
-  run-e2e-tests:
-    default: 'false'
-    description: If we need to build to run E2E tests. If yes, we need to build also x86.
   gradle-cache-encryption-key:
     description: "The encryption key needed to store the Gradle Configuration cache"
 runs:
@@ -20,6 +17,9 @@ runs:
     - name: Install node dependencies
       uses: ./.github/actions/yarn-install
     - name: Set React Native Version
+      # We don't want to set the version for stable branches, because this has been
+      # already set from the 'create release' commits on the release branch.
+      if: ${{ !endsWith(github.ref_name, '-stable') }}
       shell: bash
       run: node ./scripts/releases/set-rn-artifacts-version.js --build-type ${{ inputs.release-type }}
     - name: Setup gradle
@@ -31,10 +31,11 @@ runs:
       uses: actions/cache/restore@v4
       with:
         path: /github/home/.cache/ccache
-        key: v1-ccache-android-${{ github.job }}-${{ github.ref }}
+        key: v2-ccache-android-${{ github.job }}-${{ github.ref }}-${{ hashFiles('packages/react-native/ReactAndroid/**/*.cpp', 'packages/react-native/ReactAndroid/**/*.h', 'packages/react-native/ReactCommon/**/*.cpp', 'packages/react-native/ReactAndroid/**/CMakeLists.txt', 'packages/react-native/ReactCommon/**/CMakeLists.txt') }}
         restore-keys: |
-          v1-ccache-android-${{ github.job }}-
-          v1-ccache-android-
+          v2-ccache-android-${{ github.job }}-${{ github.ref }}-
+          v2-ccache-android-${{ github.job }}-
+          v2-ccache-android-
     - name: Show ccache stats
       shell: bash
       run: ccache -s -v
@@ -43,11 +44,7 @@ runs:
       run: |
         if [[ "${{ inputs.release-type }}" == "dry-run" ]]; then
           # dry-run: we only build ARM64 to save time/resources. For release/nightlies the default is to build all archs.
-          if [[ "${{ inputs.run-e2e-tests }}" == 'true' ]]; then
-            export ORG_GRADLE_PROJECT_reactNativeArchitectures="arm64-v8a,x86" # x86 is required for E2E testing
-          else
-            export ORG_GRADLE_PROJECT_reactNativeArchitectures="arm64-v8a"
-          fi
+          export ORG_GRADLE_PROJECT_reactNativeArchitectures="arm64-v8a,x86" # x86 is required for E2E testing
           TASKS="publishAllToMavenTempLocal build"
         elif [[ "${{ inputs.release-type }}" == "nightly" ]]; then
           # nightly: we set isSnapshot to true so artifacts are sent to the right repository on Maven Central.
@@ -63,7 +60,7 @@ runs:
       uses: actions/cache/save@v4
       with:
         path: /github/home/.cache/ccache
-        key: v1-ccache-android-${{ github.job }}-${{ github.ref }}
+        key: v2-ccache-android-${{ github.job }}-${{ github.ref }}-${{ hashFiles('packages/react-native/ReactAndroid/**/*.cpp', 'packages/react-native/ReactAndroid/**/*.h', 'packages/react-native/ReactCommon/**/*.cpp', 'packages/react-native/ReactAndroid/**/CMakeLists.txt', 'packages/react-native/ReactCommon/**/CMakeLists.txt') }}
     - name: Show ccache stats
       shell: bash
       run: ccache -s -v
@@ -86,27 +83,13 @@ runs:
       if: ${{ always() }}
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: rntester-hermes-debug
-        path: packages/rn-tester/android/app/build/outputs/apk/hermes/debug/
+        name: rntester-debug
+        path: packages/rn-tester/android/app/build/outputs/apk/debug/
         compression-level: 0
     - name: Upload RNTester APK - hermes-release
       if: ${{ always() }}
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: rntester-hermes-release
-        path: packages/rn-tester/android/app/build/outputs/apk/hermes/release/
-        compression-level: 0
-    - name: Upload RNTester APK - jsc-debug
-      if: ${{ always() }}
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: rntester-jsc-debug
-        path: packages/rn-tester/android/app/build/outputs/apk/jsc/debug/
-        compression-level: 0
-    - name: Upload RNTester APK - jsc-release
-      if: ${{ always() }}
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: rntester-jsc-release
-        path: packages/rn-tester/android/app/build/outputs/apk/jsc/release/
+        name: rntester-release
+        path: packages/rn-tester/android/app/build/outputs/apk/release/
         compression-level: 0

.github/actions/build-apple-slices-hermes/action.yml

@@ -1,103 +0,0 @@
-name: build-apple-slices-hermes
-description: This action builds hermesc for Apple platforms
-inputs:
-  hermes-version:
-    required: true
-    description: The version of Hermes
-  react-native-version:
-    required: true
-    description: The version of Hermes
-  slice:
-    required: true
-    description: The slice of hermes you want to build. It could be iphone, iphonesimulator, macos, catalyst, appletvos, appletvsimulator, xros, or xrossimulator
-  flavor:
-    required: true
-    description: The flavor we want to build. It can be Debug or Release
-runs:
-  using: composite
-  steps:
-    - name: Setup xcode
-      uses: ./.github/actions/setup-xcode
-    - name: Restore Hermes workspace
-      uses: ./.github/actions/restore-hermes-workspace
-    - name: Restore HermesC Artifact
-      uses: actions/download-artifact@v4
-      with:
-        name: hermesc-apple
-        path: ./packages/react-native/sdks/hermes/build_host_hermesc
-    - name: Restore Slice From Cache
-      id: restore-slice-cache
-      uses: actions/cache/restore@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/build_${{ inputs.slice }}_${{ inputs.flavor }}
-        key: v6-hermes-apple-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}-${{ hashfiles('packages/react-native/sdks/hermes-engine/utils/build-apple-framework.sh') }}-${{ inputs.slice }}-${{ inputs.flavor }}
-    - name: Build the Hermes ${{ inputs.slice }} frameworks
-      shell: bash
-      run: |
-        cd ./packages/react-native/sdks/hermes || exit 1
-        SLICE=${{ inputs.slice }}
-        FLAVOR=${{ inputs.flavor }}
-        FINAL_PATH=build_"$SLICE"_"$FLAVOR"
-        echo "Final path for this slice is: $FINAL_PATH"
-
-        if [[ -d "$FINAL_PATH" ]]; then
-          echo "[HERMES] Skipping! Found the requested slice at $FINAL_PATH".
-          exit 0
-        fi
-
-        if [[ "$ARTIFACTS_EXIST" ]]; then
-          echo "[HERMES] Skipping! Artifacts exists already."
-          exit 0
-        fi
-
-        export RELEASE_VERSION=${{ inputs.react-native-version }}
-
-        # HermesC is used to build hermes, so it has to be executable
-        chmod +x ./build_host_hermesc/bin/hermesc
-
-        if [[ "$SLICE" == "macosx" ]]; then
-          echo "[HERMES] Building Hermes for MacOS"
-
-          chmod +x ./utils/build-mac-framework.sh
-          BUILD_TYPE="${{ inputs.flavor }}" ./utils/build-mac-framework.sh
-        else
-          echo "[HERMES] Building Hermes for iOS: $SLICE"
-
-          chmod +x ./utils/build-ios-framework.sh
-          BUILD_TYPE="${{ inputs.flavor }}" ./utils/build-ios-framework.sh "$SLICE"
-        fi
-
-        echo "Moving from build_$SLICE to $FINAL_PATH"
-        mv build_"$SLICE" "$FINAL_PATH"
-
-        # check whether everything is there
-        if [[ -d "$FINAL_PATH/API/hermes/hermes.framework" ]]; then
-          echo "Successfully built hermes.framework for $SLICE in $FLAVOR"
-        else
-          echo "Failed to built hermes.framework for $SLICE in $FLAVOR"
-          exit 1
-        fi
-
-        if [[ -d "$FINAL_PATH/API/hermes/hermes.framework.dSYM" ]]; then
-          echo "Successfully built hermes.framework.dSYM for $SLICE in $FLAVOR"
-        else
-          echo "Failed to built hermes.framework.dSYM for $SLICE in $FLAVOR"
-          echo "Please try again"
-          exit 1
-        fi
-    - name: Compress slices to preserve Symlinks
-      shell: bash
-      run: |
-        cd ./packages/react-native/sdks/hermes
-        tar -czv -f build_${{ matrix.slice }}_${{ matrix.flavor }}.tar.gz build_${{ matrix.slice }}_${{ matrix.flavor }}
-    - name: Upload Artifact for Slice (${{ inputs.slice }}, ${{ inputs.flavor }}}
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: slice-${{ inputs.slice }}-${{ inputs.flavor }}
-        path: ./packages/react-native/sdks/hermes/build_${{ inputs.slice }}_${{ inputs.flavor }}.tar.gz
-    - name: Save slice cache
-      if: ${{ github.ref == 'refs/heads/main' || contains(github.ref, '-stable') }} # To avoid that the cache explode.
-      uses: actions/cache/save@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/build_${{ inputs.slice }}_${{ inputs.flavor }}
-        key: v6-hermes-apple-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}-${{ hashfiles('packages/react-native/sdks/hermes-engine/utils/build-apple-framework.sh') }}-${{ inputs.SLICE }}-${{ inputs.FLAVOR }}

.github/actions/build-hermes-macos/action.yml

@@ -1,227 +0,0 @@
-name: build-hermes-macos
-description: This action builds hermesc for Apple platforms
-inputs:
-  hermes-version:
-    required: true
-    description: The version of Hermes
-  react-native-version:
-    required: true
-    description: The version of React Native
-  flavor:
-    required: true
-    description: The flavor we want to build. It can be Debug or Release
-runs:
-  using: composite
-  steps:
-    - name: Setup xcode
-      uses: ./.github/actions/setup-xcode
-    - name: Setup node.js
-      uses: ./.github/actions/setup-node
-    - name: Restore Hermes workspace
-      uses: ./.github/actions/restore-hermes-workspace
-    - name: Restore Cached Artifacts
-      uses: actions/cache/restore@v4
-      with:
-        key: v4-hermes-artifacts-${{ inputs.flavor }}-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}-${{ hashFiles('./packages/react-native/sdks/hermes-engine/utils/build-apple-framework.sh') }}
-        path: |
-          /tmp/hermes/osx-bin/${{ inputs.flavor }}
-          /tmp/hermes/dSYM/${{ inputs.flavor }}
-          /tmp/hermes/hermes-runtime-darwin/hermes-ios-${{ inputs.flavor }}.tar.gz
-    - name: Check if the required artifacts already exist
-      id: check_if_apple_artifacts_are_there
-      shell: bash
-      run: |
-        FLAVOR="${{ inputs.flavor }}"
-        echo "Flavor is $FLAVOR"
-        OSX_BIN="/tmp/hermes/osx-bin/$FLAVOR"
-        DSYM="/tmp/hermes/dSYM/$FLAVOR"
-        HERMES="/tmp/hermes/hermes-runtime-darwin/hermes-ios-$FLAVOR.tar.gz"
-
-        if [[ -d "$OSX_BIN" ]] && \
-            [[ -d "$DSYM" ]] && \
-            [[ -f "$HERMES" ]]; then
-
-          echo "Artifacts are there!"
-          echo "ARTIFACTS_EXIST=true" >> $GITHUB_ENV
-          echo "ARTIFACTS_EXIST=true" >> $GITHUB_OUTPUT
-        fi
-    - name: Yarn- Install Dependencies
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: ./.github/actions/yarn-install
-    - name: Slice cache macosx
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-macosx-${{ inputs.flavor }}
-    - name: Slice cache iphoneos
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-iphoneos-${{ inputs.flavor }}
-    - name: Slice cache iphonesimulator
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-iphonesimulator-${{ inputs.flavor }}
-    - name: Slice cache appletvos
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-appletvos-${{ inputs.flavor }}
-    - name: Slice cache appletvsimulator
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-appletvsimulator-${{ inputs.flavor }}
-    - name: Slice cache catalyst
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-catalyst-${{ inputs.flavor }}
-    - name: Slice cache xros
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-xros-${{ inputs.flavor }}
-    - name: Slice cache xrsimulator
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      uses: actions/download-artifact@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/
-        name: slice-xrsimulator-${{ inputs.flavor }}
-    - name: Unzip slices
-      shell: bash
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      run: |
-        cd ./packages/react-native/sdks/hermes
-        ls -l .
-        tar -xzv -f build_catalyst_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_iphoneos_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_iphonesimulator_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_appletvos_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_appletvsimulator_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_macosx_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_xros_${{ matrix.flavor }}.tar.gz
-        tar -xzv -f build_xrsimulator_${{ matrix.flavor }}.tar.gz
-    - name: Move back build folders
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      shell: bash
-      run: |
-        ls -l ./packages/react-native/sdks/hermes
-        cd ./packages/react-native/sdks/hermes || exit 1
-        mv build_macosx_${{ inputs.flavor }} build_macosx
-        mv build_iphoneos_${{ inputs.flavor }} build_iphoneos
-        mv build_iphonesimulator_${{ inputs.flavor }} build_iphonesimulator
-        mv build_appletvos_${{ inputs.flavor }} build_appletvos
-        mv build_appletvsimulator_${{ inputs.flavor }} build_appletvsimulator
-        mv build_catalyst_${{ inputs.flavor }} build_catalyst
-        mv build_xros_${{ inputs.flavor }} build_xros
-        mv build_xrsimulator_${{ inputs.flavor }} build_xrsimulator
-    - name: Prepare destroot folder
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      shell: bash
-      run: |
-        cd ./packages/react-native/sdks/hermes || exit 1
-        chmod +x ./utils/build-apple-framework.sh
-        . ./utils/build-apple-framework.sh
-        prepare_dest_root_for_ci
-    - name: Create fat framework for iOS
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      shell: bash
-      run: |
-        cd ./packages/react-native/sdks/hermes || exit 1
-        echo "[HERMES] Creating the universal framework"
-        chmod +x ./utils/build-ios-framework.sh
-        ./utils/build-ios-framework.sh build_framework
-
-        chmod +x ./destroot/bin/hermesc
-    - name: Package the Hermes Apple frameworks
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      shell: bash
-      run: |
-        BUILD_TYPE="${{ inputs.flavor }}"
-        echo "Packaging Hermes Apple frameworks for $BUILD_TYPE build type"
-
-        TARBALL_OUTPUT_DIR=$(mktemp -d /tmp/hermes-tarball-output-XXXXXXXX)
-
-        TARBALL_FILENAME=$(node ./packages/react-native/scripts/hermes/get-tarball-name.js --buildType "$BUILD_TYPE")
-
-        echo "Packaging Hermes Apple frameworks for $BUILD_TYPE build type"
-
-        TARBALL_OUTPUT_PATH=$(node ./packages/react-native/scripts/hermes/create-tarball.js \
-          --inputDir ./packages/react-native/sdks/hermes \
-          --buildType "$BUILD_TYPE" \
-          --outputDir $TARBALL_OUTPUT_DIR)
-
-        echo "Hermes tarball saved to $TARBALL_OUTPUT_PATH"
-
-        mkdir -p $HERMES_TARBALL_ARTIFACTS_DIR
-        cp $TARBALL_OUTPUT_PATH $HERMES_TARBALL_ARTIFACTS_DIR/.
-
-        mkdir -p /tmp/hermes/osx-bin/${{ inputs.flavor }}
-        cp ./packages/react-native/sdks/hermes/build_macosx/bin/* /tmp/hermes/osx-bin/${{ inputs.flavor }}
-        ls -lR /tmp/hermes/osx-bin/
-    - name: Create dSYM archive
-      if: ${{ steps.check_if_apple_artifacts_are_there.outputs.ARTIFACTS_EXIST != 'true' }}
-      shell: bash
-      run: |
-        FLAVOR=${{ inputs.flavor }}
-        WORKING_DIR="/tmp/hermes_tmp/dSYM/$FLAVOR"
-
-        mkdir -p "$WORKING_DIR/macosx"
-        mkdir -p "$WORKING_DIR/catalyst"
-        mkdir -p "$WORKING_DIR/iphoneos"
-        mkdir -p "$WORKING_DIR/iphonesimulator"
-        mkdir -p "$WORKING_DIR/appletvos"
-        mkdir -p "$WORKING_DIR/appletvsimulator"
-        mkdir -p "$WORKING_DIR/xros"
-        mkdir -p "$WORKING_DIR/xrsimulator"
-
-        cd ./packages/react-native/sdks/hermes || exit 1
-
-        DSYM_FILE_PATH=API/hermes/hermes.framework.dSYM
-        cp -r build_macosx/$DSYM_FILE_PATH "$WORKING_DIR/macosx/"
-        cp -r build_catalyst/$DSYM_FILE_PATH "$WORKING_DIR/catalyst/"
-        cp -r build_iphoneos/$DSYM_FILE_PATH "$WORKING_DIR/iphoneos/"
-        cp -r build_iphonesimulator/$DSYM_FILE_PATH "$WORKING_DIR/iphonesimulator/"
-        cp -r build_appletvos/$DSYM_FILE_PATH "$WORKING_DIR/appletvos/"
-        cp -r build_appletvsimulator/$DSYM_FILE_PATH "$WORKING_DIR/appletvsimulator/"
-        cp -r build_xros/$DSYM_FILE_PATH "$WORKING_DIR/xros/"
-        cp -r build_xrsimulator/$DSYM_FILE_PATH "$WORKING_DIR/xrsimulator/"
-
-        DEST_DIR="/tmp/hermes/dSYM/$FLAVOR"
-        tar -C "$WORKING_DIR" -czvf "hermes.framework.dSYM" .
-
-        mkdir -p "$DEST_DIR"
-        mv "hermes.framework.dSYM" "$DEST_DIR"
-    - name: Upload hermes dSYM artifacts
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-dSYM-${{ inputs.flavor }}
-        path: /tmp/hermes/dSYM/${{ inputs.flavor }}
-    - name: Upload hermes Runtime artifacts
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-darwin-bin-${{ inputs.flavor }}
-        path: /tmp/hermes/hermes-runtime-darwin/hermes-ios-${{ inputs.flavor }}.tar.gz
-    - name: Upload hermes osx artifacts
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-osx-bin-${{ inputs.flavor }}
-        path: /tmp/hermes/osx-bin/${{ inputs.flavor }}
-    - name: Upload Hermes Artifacts
-      uses: actions/cache/save@v4
-      if: ${{ github.ref == 'refs/heads/main' || contains(github.ref, '-stable') }} # To avoid that the cache explode.
-      with:
-        key: v4-hermes-artifacts-${{ inputs.flavor }}-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}-${{ hashFiles('./packages/react-native/sdks/hermes-engine/utils/build-apple-framework.sh') }}
-        path: |
-          /tmp/hermes/osx-bin/${{ inputs.flavor }}
-          /tmp/hermes/dSYM/${{ inputs.flavor }}
-          /tmp/hermes/hermes-runtime-darwin/hermes-ios-${{ inputs.flavor }}.tar.gz

.github/actions/build-hermesc-apple/action.yml

@@ -1,37 +0,0 @@
-name: build-hermesc-apple
-description: This action builds hermesc for Apple platforms
-inputs:
-  hermes-version:
-    required: true
-    description: The version of Hermes
-  react-native-version:
-    required: true
-    description: The version of React Native
-runs:
-  using: composite
-  steps:
-    - name: Restore Hermes workspace
-      uses: ./.github/actions/restore-hermes-workspace
-    - name: Hermes apple cache
-      uses: actions/cache/restore@v4
-      with:
-        path: ./packages/react-native/sdks/hermes/build_host_hermesc
-        key: v2-hermesc-apple-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}
-    - name: Build HermesC Apple
-      shell: bash
-      run: |
-        cd ./packages/react-native/sdks/hermes || exit 1
-        . ./utils/build-apple-framework.sh
-        build_host_hermesc_if_needed
-    - name: Upload HermesC Artifact
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermesc-apple
-        path: ./packages/react-native/sdks/hermes/build_host_hermesc
-    - name: Cache hermesc apple
-      uses: actions/cache/save@v4
-      if: ${{ github.ref == 'refs/heads/main' || contains(github.ref, '-stable') }} # To avoid that the cache explode.
-      with:
-        path: ./packages/react-native/sdks/hermes/build_host_hermesc
-        key: v2-hermesc-apple-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}
-        enableCrossOsArchive: true

.github/actions/build-hermesc-linux/action.yml

@@ -1,53 +0,0 @@
-name: build-hermesc-linux
-description: This action builds hermesc for linux platforms
-inputs:
-  hermes-version:
-    required: True
-    description: The version of Hermes
-  react-native-version:
-    required: True
-    description: The version of React Native
-runs:
-  using: composite
-  steps:
-    - name: Install dependencies
-      shell: bash
-      run: |
-        sudo apt update
-        sudo apt install -y git openssh-client build-essential \
-            libreadline-dev libicu-dev jq zip python3
-
-        # Install cmake 3.28.3-1build7
-        sudo apt-get install cmake=3.28.3-1build7
-        sudo ln -sf /usr/bin/cmake /usr/local/bin/cmake
-    - name: Restore Hermes workspace
-      uses: ./.github/actions/restore-hermes-workspace
-    - name: Linux cache
-      uses: actions/cache@v4
-      with:
-        key: v1-hermes-${{ github.job }}-linux-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}
-        path: |
-          /tmp/hermes/linux64-bin/
-          /tmp/hermes/hermes/destroot/
-    - name: Set up workspace
-      shell: bash
-      run: |
-        mkdir -p /tmp/hermes/linux64-bin
-    - name: Build HermesC for Linux
-      shell: bash
-      run: |
-        if [ -f /tmp/hermes/linux64-bin/hermesc ]; then
-          echo 'Skipping; Clean "/tmp/hermes/linux64-bin" to rebuild.'
-        else
-          cd /tmp/hermes
-          cmake -S hermes -B build -DHERMES_STATIC_LINK=ON -DCMAKE_BUILD_TYPE=Release -DHERMES_ENABLE_TEST_SUITE=OFF \
-            -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=True -DCMAKE_CXX_FLAGS=-s -DCMAKE_C_FLAGS=-s \
-            -DCMAKE_EXE_LINKER_FLAGS="-Wl,--whole-archive -lpthread -Wl,--no-whole-archive"
-          cmake --build build --target hermesc -j 4
-          cp /tmp/hermes/build/bin/hermesc /tmp/hermes/linux64-bin/.
-        fi
-    - name: Upload linux artifacts
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-linux-bin
-        path: /tmp/hermes/linux64-bin

.github/actions/build-hermesc-windows/action.yml

@@ -1,86 +0,0 @@
-name: build-hermesc-windows
-description: This action builds hermesc for Windows platforms
-inputs:
-  hermes-version:
-    required: True
-    description: The version of Hermes
-  react-native-version:
-    required: True
-    description: The version of React Native
-runs:
-  using: composite
-  steps:
-    - name: Download Previous Artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-workspace
-        path: 'D:\tmp\hermes'
-    - name: Set up workspace
-      shell: powershell
-      run: |
-        mkdir -p D:\tmp\hermes\osx-bin
-        mkdir -p .\packages\react-native\sdks\hermes
-        cp -r -Force D:\tmp\hermes\hermes\* .\packages\react-native\sdks\hermes\.
-        cp -r -Force .\packages\react-native\sdks\hermes-engine\utils\* .\packages\react-native\sdks\hermes\.
-    - name: Windows cache
-      uses: actions/cache@v4
-      with:
-        key: v2-hermes-${{ github.job }}-windows-${{ inputs.hermes-version }}-${{ inputs.react-native-version }}
-        path: |
-          D:\tmp\hermes\win64-bin\
-          D:\tmp\hermes\hermes\icu\
-          D:\tmp\hermes\hermes\deps\
-          D:\tmp\hermes\hermes\build_release\
-    - name: setup-msbuild
-      uses: microsoft/setup-msbuild@v1.3.2
-    - name: Set up workspace
-      shell: powershell
-      run: |
-        New-Item -ItemType Directory -ErrorAction SilentlyContinue $Env:HERMES_WS_DIR\icu
-        New-Item -ItemType Directory -ErrorAction SilentlyContinue $Env:HERMES_WS_DIR\deps
-        New-Item -ItemType Directory -ErrorAction SilentlyContinue $Env:HERMES_WS_DIR\win64-bin
-    - name: Downgrade CMake
-      shell: powershell
-      run: choco install cmake --version 3.31.6 --force
-    - name: Build HermesC for Windows
-      shell: powershell
-      run: |
-        if (-not(Test-Path -Path $Env:HERMES_WS_DIR\win64-bin\hermesc.exe)) {
-          cd $Env:HERMES_WS_DIR\icu
-          # If Invoke-WebRequest shows a progress bar, it will fail with
-          #   Win32 internal error "Access is denied" 0x5 occurred [...]
-          $progressPreference = 'silentlyContinue'
-          Invoke-WebRequest -Uri "$Env:ICU_URL" -OutFile "icu.zip"
-          Expand-Archive -Path "icu.zip" -DestinationPath "."
-
-          cd $Env:HERMES_WS_DIR
-          Copy-Item -Path "icu\bin64\icu*.dll" -Destination "deps"
-          # Include MSVC++ 2015 redistributables
-          Copy-Item -Path "c:\windows\system32\msvcp140.dll" -Destination "deps"
-          Copy-Item -Path "c:\windows\system32\vcruntime140.dll" -Destination "deps"
-          Copy-Item -Path "c:\windows\system32\vcruntime140_1.dll" -Destination "deps"
-
-          $Env:PATH += ";$Env:CMAKE_DIR;$Env:MSBUILD_DIR"
-          $Env:ICU_ROOT = "$Env:HERMES_WS_DIR\icu"
-
-          cmake -S hermes -B build_release -G 'Visual Studio 16 2019' -Ax64 -DCMAKE_BUILD_TYPE=Release -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=True -DHERMES_ENABLE_WIN10_ICU_FALLBACK=OFF
-          if (-not $?) { throw "Failed to configure Hermes" }
-          echo "Running windows build..."
-          cd build_release
-          cmake --build . --target hermesc --config Release
-          if (-not $?) { throw "Failed to build Hermes" }
-
-          echo "Copying hermesc.exe to win64-bin"
-          cd $Env:HERMES_WS_DIR
-          Copy-Item -Path "build_release\bin\Release\hermesc.exe" -Destination "win64-bin"
-          # Include Windows runtime dependencies
-          Copy-Item -Path "deps\*" -Destination "win64-bin"
-        }
-        else {
-            Write-Host "Skipping; Clean c:\tmp\hermes\win64-bin to rebuild."
-        }
-    - name: Upload windows artifacts
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-win64-bin
-        path: D:\tmp\hermes\win64-bin\

.github/actions/build-npm-package/action.yml

@@ -4,9 +4,6 @@ inputs:
   release-type:
     required: true
     description: The type of release we are building. It could be nightly, release or dry-run
-  hermes-ws-dir:
-    required: 'true'
-    description: The workspace for hermes
   gha-npm-token:
     required: false
     description: The GHA npm token, required only to publish to npm
@@ -20,102 +17,27 @@ runs:
     - name: Setup git safe folders
       shell: bash
       run: git config --global --add safe.directory '*'
-    - name: Create /tmp/hermes/osx-bin directory
-      shell: bash
-      run: mkdir -p /tmp/hermes/osx-bin
-    - name: Download osx-bin release artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-osx-bin-Release
-        path: /tmp/hermes/osx-bin/Release
-    - name: Download osx-bin debug artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-osx-bin-Debug
-        path: /tmp/hermes/osx-bin/Debug
-    - name: Download darwin-bin release artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-darwin-bin-Release
-        path: /tmp/hermes/hermes-runtime-darwin
-    - name: Download darwin-bin debug artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-darwin-bin-Debug
-        path: /tmp/hermes/hermes-runtime-darwin
-    - name: Download hermes dSYM debug artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-dSYM-Debug
-        path: /tmp/hermes/dSYM/Debug
-    - name: Download hermes dSYM release vartifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-dSYM-Release
-        path: /tmp/hermes/dSYM/Release
-    - name: Download windows-bin artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-win64-bin
-        path: /tmp/hermes/win64-bin
-    - name: Download linux-bin artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-linux-bin
-        path: /tmp/hermes/linux64-bin
-    - name: Show /tmp/hermes directory
-      shell: bash
-      run: ls -lR /tmp/hermes
-    - name: Copy Hermes binaries
-      shell: bash
-      run: |
-        mkdir -p ./packages/react-native/sdks/hermesc ./packages/react-native/sdks/hermesc/osx-bin ./packages/react-native/sdks/hermesc/win64-bin ./packages/react-native/sdks/hermesc/linux64-bin
-
-        # When build_hermes_macos runs as a matrix, it outputs
-        if [[ -d ${{ inputs.hermes-ws-dir }}/osx-bin/Release ]]; then
-          cp -r ${{ inputs.hermes-ws-dir }}/osx-bin/Release/* ./packages/react-native/sdks/hermesc/osx-bin/.
-        elif [[ -d ${{ inputs.hermes-ws-dir }}/osx-bin/Debug ]]; then
-          cp -r ${{ inputs.hermes-ws-dir }}/osx-bin/Debug/* ./packages/react-native/sdks/hermesc/osx-bin/.
-        else
-          ls ${{ inputs.hermes-ws-dir }}/osx-bin || echo "hermesc macOS artifacts directory missing."
-          echo "Could not locate macOS hermesc binary."; exit 1;
-        fi
-
-        # Sometimes, GHA creates artifacts with lowercase Debug/Release. Make sure that if it happen, we uppercase them.
-        if [[ -f "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-debug.tar.gz" ]]; then
-          mv "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-debug.tar.gz" "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-Debug.tar.gz"
-        fi
-
-        if [[ -f "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-release.tar.gz" ]]; then
-          mv "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-release.tar.gz" "${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-Release.tar.gz"
-        fi
-
-        cp -r ${{ inputs.hermes-ws-dir }}/win64-bin/* ./packages/react-native/sdks/hermesc/win64-bin/.
-        cp -r ${{ inputs.hermes-ws-dir }}/linux64-bin/* ./packages/react-native/sdks/hermesc/linux64-bin/.
-
-        # Make sure the hermesc files are actually executable.
-        chmod -R +x packages/react-native/sdks/hermesc/*
-
-        mkdir -p ./packages/react-native/ReactAndroid/external-artifacts/artifacts/
-        cp ${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-Debug.tar.gz ./packages/react-native/ReactAndroid/external-artifacts/artifacts/hermes-ios-debug.tar.gz
-        cp ${{ inputs.hermes-ws-dir }}/hermes-runtime-darwin/hermes-ios-Release.tar.gz ./packages/react-native/ReactAndroid/external-artifacts/artifacts/hermes-ios-release.tar.gz
-        cp ${{ inputs.hermes-ws-dir }}/dSYM/Debug/hermes.framework.dSYM  ./packages/react-native/ReactAndroid/external-artifacts/artifacts/hermes-framework-dSYM-debug.tar.gz
-        cp ${{ inputs.hermes-ws-dir }}/dSYM/Release/hermes.framework.dSYM  ./packages/react-native/ReactAndroid/external-artifacts/artifacts/hermes-framework-dSYM-release.tar.gz
     - name: Download ReactNativeDependencies
       uses: actions/download-artifact@v4
       with:
         pattern: ReactNativeDependencies*
         path: ./packages/react-native/ReactAndroid/external-artifacts/artifacts
         merge-multiple: true
+    - name: Download ReactCore artifacts
+      uses: actions/download-artifact@v4
+      with:
+        pattern: ReactCore*
+        path: ./packages/react-native/ReactAndroid/external-artifacts/artifacts
+        merge-multiple: true
     - name: Print Artifacts Directory
       shell: bash
       run: ls -lR ./packages/react-native/ReactAndroid/external-artifacts/artifacts/
-    - name: Setup node.js
-      uses: ./.github/actions/setup-node
     - name: Setup gradle
       uses: ./.github/actions/setup-gradle
       with:
         cache-encryption-key: ${{ inputs.gradle-cache-encryption-key }}
+    - name: Setup node.js
+      uses: ./.github/actions/setup-node
     - name: Install dependencies
       uses: ./.github/actions/yarn-install
     - name: Build packages
@@ -123,7 +45,7 @@ runs:
       run: yarn build
     - name: Build types
       shell: bash
-      run: yarn build-types
+      run: yarn build-types --skip-snapshot
     # Continue with publish steps
     - name: Set npm credentials
       if: ${{ inputs.release-type == 'release' ||

.github/actions/create-release/action.yml

@@ -14,6 +14,8 @@ inputs:
 runs:
   using: composite
   steps:
+    - name: Setup node.js
+      uses: ./.github/actions/setup-node
     - name: Yarn install
       uses: ./.github/actions/yarn-install
     - name: Configure Git

.github/actions/diff-js-api-breaking-changes/action.yml

@@ -0,0 +1,23 @@
+name: diff-js-api-breaking-changes
+description: Check for breaking changes in the public React Native JS API
+runs:
+  using: composite
+  steps:
+    - name: Fetch snapshot from PR head
+      shell: bash
+      env:
+        SCRATCH_DIR: ${{ runner.temp }}/diff-js-api-breaking-changes
+      run: |
+        mkdir $SCRATCH_DIR
+        git fetch --depth=1 origin ${{ github.event.pull_request.head.sha }}
+        git show ${{ github.event.pull_request.head.sha }}:packages/react-native/ReactNativeApi.d.ts > $SCRATCH_DIR/ReactNativeApi-after.d.ts \
+          || echo "" > $SCRATCH_DIR/ReactNativeApi.d.ts
+    - name: Run breaking change detection
+      shell: bash
+      env:
+        SCRATCH_DIR: ${{ runner.temp }}/diff-js-api-breaking-changes
+      run: |
+        node ./scripts/js-api/diff-api-snapshot \
+        ${{ github.workspace }}/packages/react-native/ReactNativeApi.d.ts  \
+        $SCRATCH_DIR/ReactNativeApi-after.d.ts \
+        > $SCRATCH_DIR/output.json

.github/actions/lint/action.yml

@@ -4,7 +4,7 @@ inputs:
   node-version:
     description: "The node.js version to use"
     required: false
-    default: "20"
+    default: "22"
   github-token:
     description: "The GitHub token used by pull-bot"
     required: true
@@ -26,15 +26,12 @@ runs:
     - name: Lint code
       shell: bash
       run: ./.github/workflow-scripts/exec_swallow_error.sh yarn lint --format junit -o ./reports/junit/eslint/results.xml
-    - name: Lint java
-      shell: bash
-      run: ./.github/workflow-scripts/exec_swallow_error.sh yarn lint-java --check
     - name: Lint file structure
       shell: bash
       run: ./.github/workflow-scripts/lint_files.sh
     - name: Verify not committing repo after running build
       shell: bash
-      run: yarn run build --check
+      run: yarn run build --validate
     - name: Run flowcheck
       shell: bash
       run: yarn flow-check
@@ -50,3 +47,9 @@ runs:
     - name: Lint markdown
       shell: bash
       run: yarn run lint-markdown
+    - name: Build types
+      shell: bash
+      run: yarn build-types --skip-snapshot
+    - name: Run typescript check of generated types
+      shell: bash
+      run: yarn test-generated-typescript

.github/actions/maestro-android/action.yml

@@ -1,5 +1,5 @@
 name: Maestro E2E Android
-description: Runs E2E Tests on iOS using Maestro
+description: Runs E2E Tests on Android using Maestro
 inputs:
   app-path:
     required: true
@@ -7,9 +7,6 @@ inputs:
   app-id:
     required: true
     description: The id of the app to test
-  jsengine:
-    required: true
-    description: The js engine we are using
   maestro-flow:
     required: true
     description: the folder that contains the maestro tests
@@ -25,17 +22,13 @@ inputs:
     required: false
     default: "."
     description: The directory from which metro should be started
-  architecture:
-    required: false
-    default: "NewArch"
-    description: The react native architecture to test
 
 runs:
   using: composite
   steps:
     - name: Installing Maestro
       shell: bash
-      run: export MAESTRO_VERSION=1.39.7; curl -Ls "https://get.maestro.mobile.dev" | bash
+      run: export MAESTRO_VERSION=1.40.0; curl -Ls "https://get.maestro.mobile.dev" | bash
     - name: Set up JDK 17
       if: ${{ inputs.install-java == 'true' }}
       uses: actions/setup-java@v4
@@ -79,7 +72,7 @@ runs:
       uses: actions/upload-artifact@v4.3.4
       if: always()
       with:
-        name: e2e_android_${{ steps.normalize-app-id.outputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}_${{ inputs.architecture }}
+        name: e2e_android_${{ steps.normalize-app-id.outputs.app-id }}_report_${{ inputs.flavor }}_NewArch
         path: |
           report.xml
           screen.mp4
@@ -87,5 +80,5 @@ runs:
       if: steps.run-tests.outcome == 'failure'
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: maestro-logs-android-${{ steps.normalize-app-id.outputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.architecture }}
+        name: maestro-logs-android-${{ steps.normalize-app-id.outputs.app-id }}-${{ inputs.flavor }}-NewArch
         path: /tmp/MaestroLogs

.github/actions/maestro-ios/action.yml

@@ -7,9 +7,6 @@ inputs:
   app-id:
     required: true
     description: The id of the app to test
-  jsengine:
-    required: true
-    description: The js engine we are using
   maestro-flow:
     required: true
     description: the folder that contains the maestro tests
@@ -21,17 +18,13 @@ inputs:
     required: false
     default: "."
     description: The directory from which metro should be started
-  architecture:
-    required: false
-    default: "NewArch"
-    description: The react native architecture to test
 
 runs:
   using: composite
   steps:
     - name: Installing Maestro
       shell: bash
-      run: export MAESTRO_VERSION=1.39.7; curl -Ls "https://get.maestro.mobile.dev" | bash
+      run: export MAESTRO_VERSION=1.40.0; curl -Ls "https://get.maestro.mobile.dev" | bash
     - name: Installing Maestro dependencies
       shell: bash
       run: |
@@ -42,6 +35,8 @@ runs:
       with:
         java-version: '17'
         distribution: 'zulu'
+    - name: Setup node.js
+      uses: ./.github/actions/setup-node
     - name: Run yarn install
       uses: ./.github/actions/yarn-install
     - name: Start Metro in Debug
@@ -66,24 +61,24 @@ runs:
           "${{ inputs.app-path }}" \
           "${{ inputs.app-id }}" \
           "${{ inputs.maestro-flow }}" \
-          "${{ inputs.jsengine }}" \
+          "Hermes" \
           "${{ inputs.flavor }}" \
           "${{ inputs.working-directory }}"
     - name: Store video record
       if: always()
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: e2e_ios_${{ inputs.app-id }}_report_${{ inputs.jsengine }}_${{ inputs.flavor }}_${{ inputs.architecture }}
+        name: e2e_ios_${{ inputs.app-id }}_report_${{ inputs.flavor }}_NewArch
         path: |
-          video_record_${{ inputs.jsengine }}_1.mov
-          video_record_${{ inputs.jsengine }}_2.mov
-          video_record_${{ inputs.jsengine }}_3.mov
-          video_record_${{ inputs.jsengine }}_4.mov
-          video_record_${{ inputs.jsengine }}_5.mov
+          video_record_1.mov
+          video_record_2.mov
+          video_record_3.mov
+          video_record_4.mov
+          video_record_5.mov
           report.xml
     - name: Store Logs
       if: failure() && steps.run-tests.outcome == 'failure'
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: maestro-logs-${{ inputs.app-id }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.architecture }}
+        name: maestro-logs-${{ inputs.app-id }}-${{ inputs.flavor }}-NewArch
         path: /tmp/MaestroLogs

.github/actions/prepare-hermes-workspace/action.yml

@@ -1,100 +0,0 @@
-name: prepare-hermes-workspace
-description: This action prepares the hermes workspace with the right hermes and react-native versions.
-inputs:
-  hermes-ws-dir:
-    required: true
-    description: The hermes dir we need to use to setup the workspace
-  hermes-version-file:
-    required: true
-    description: the path to the file that will contain the hermes version
-outputs:
-  hermes-version:
-    description: the version of Hermes tied to this run
-    value: ${{ steps.hermes-version.outputs.VERSION }}
-  react-native-version:
-    description: the version of React Native tied to this run
-    value: ${{ steps.react-native-version.outputs.VERSION }}
-runs:
-  using: composite
-  steps:
-    - name: Setup node.js
-      uses: ./.github/actions/setup-node
-
-    - name: Setup hermes version
-      shell: bash
-      id: hermes-version
-      run: |
-        mkdir -p "/tmp/hermes" "/tmp/hermes/download" "/tmp/hermes/hermes"
-
-        if [ -f "${{ inputs.hermes-version-file }}" ]; then
-          echo "Hermes Version file found! Using this version for the build:"
-          echo "VERSION=$(cat ${{ inputs.hermes-version-file }})" >> "$GITHUB_OUTPUT"
-        else
-          echo "Hermes Version file not found!!!"
-          echo "Using the last commit from main for the build:"
-          HERMES_TAG_SHA=$(git ls-remote https://github.com/facebook/hermes main | cut -f 1 | tr -d '[:space:]')
-          echo "VERSION=$HERMES_TAG_SHA" >> "$GITHUB_OUTPUT"
-        fi
-        echo "Hermes commit is $HERMES_TAG_SHA"
-
-    - name: Get react-native version
-      shell: bash
-      id: react-native-version
-      run: |
-        VERSION=$(cat packages/react-native/package.json | jq -r '.version')
-        # Save the react native version we are building in an output variable so we can use that file as part of the cache key.
-        echo "VERSION=$VERSION" >> "$GITHUB_OUTPUT"
-        echo "React Native Version is $VERSION"
-
-    - name: Cache hermes workspace
-      id: restore-hermes
-      uses: actions/cache/restore@v4
-      with:
-        path: |
-          /tmp/hermes/download/
-          /tmp/hermes/hermes/
-        key: v1-hermes-${{ steps.hermes-version.outputs.version }}
-        enableCrossOsArchive: true
-
-    # It happened while testing that a cache was created from the right folders
-    # but those folders where empty. Thus, the next check ensures that we can work with those caches.
-    - name: Check if cache was meaningful
-      id: meaningful-cache
-      shell: bash
-      run: |
-        if [[ -d /tmp/hermes/hermes ]] && [[ -n "$(ls -A /tmp/hermes/hermes)"  ]]; then
-          echo "Found a good hermes cache"
-          echo "HERMES_CACHED=true" >> "$GITHUB_OUTPUT"
-        fi
-
-    - name: Yarn- Install Dependencies
-      if: ${{ steps.meaningful-cache.outputs.HERMES_CACHED != 'true' }}
-      uses: ./.github/actions/yarn-install
-
-    - name: Download Hermes tarball
-      if: ${{ steps.meaningful-cache.outputs.HERMES_CACHED != 'true' }}
-      shell: bash
-      run: |
-        node packages/react-native/scripts/hermes/prepare-hermes-for-build ${{ github.event.pull_request.html_url }}
-        cp packages/react-native/sdks/download/* ${{ inputs.hermes-ws-dir }}/download/.
-        cp -r packages/react-native/sdks/hermes/* ${{ inputs.hermes-ws-dir }}/hermes/.
-
-        echo ${{ steps.hermes-version.outputs.version }}
-
-    - name: Upload Hermes artifact
-      uses: actions/upload-artifact@v4.3.4
-      with:
-        name: hermes-workspace
-        path: |
-          /tmp/hermes/download/
-          /tmp/hermes/hermes/
-
-    - name: Cache hermes workspace
-      uses: actions/cache/save@v4
-      if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode.
-      with:
-        path: |
-          /tmp/hermes/download/
-          /tmp/hermes/hermes/
-        key: v1-hermes-${{ steps.hermes-version.outputs.version }}
-        enableCrossOsArchive: true

.github/actions/restore-hermes-workspace/action.yml

@@ -1,16 +0,0 @@
-name: restore-hermes-workspace
-description: "Restore hermes workspace that has been created in Prepare Hermes Workspace"
-runs:
-  using: composite
-  steps:
-    - name: Download Previous Artifacts
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-workspace
-        path: /tmp/hermes
-    - name: Set up workspace
-      shell: bash
-      run: |
-        mkdir -p $HERMES_OSXBIN_ARTIFACTS_DIR ./packages/react-native/sdks/hermes
-        cp -r $HERMES_WS_DIR/hermes/* ./packages/react-native/sdks/hermes/.
-        cp -r ./packages/react-native/sdks/hermes-engine/utils ./packages/react-native/sdks/hermes/.

.github/actions/run-fantom-tests/action.yml

@@ -0,0 +1,83 @@
+name: Run Fantom Tests
+inputs:
+  release-type:
+    required: true
+    description: The type of release we are building. It could be nightly, release or dry-run
+  gradle-cache-encryption-key:
+    description: "The encryption key needed to store the Gradle Configuration cache"
+
+runs:
+  using: composite
+  steps:
+    - name: Install dependencies
+      shell: bash
+      run: |
+        sudo apt update
+        sudo apt install -y git cmake openssl libssl-dev clang
+    - name: Setup git safe folders
+      shell: bash
+      run: git config --global --add safe.directory '*'
+    - name: Setup node.js
+      uses: ./.github/actions/setup-node
+    - name: Install node dependencies
+      uses: ./.github/actions/yarn-install
+    - name: Setup gradle
+      uses: ./.github/actions/setup-gradle
+      with:
+        cache-read-only: "false"
+        cache-encryption-key: ${{ inputs.gradle-cache-encryption-key }}
+    - name: Restore Fantom ccache
+      uses: actions/cache/restore@v4
+      with:
+        path: /github/home/.cache/ccache
+        key: v2-ccache-fantom-${{ github.job }}-${{ github.ref }}-${{ hashFiles(
+            'packages/react-native/ReactAndroid/**/*.cpp',
+            'packages/react-native/ReactAndroid/**/*.h',
+            'packages/react-native/ReactAndroid/**/CMakeLists.txt',
+            'packages/react-native/ReactCommon/**/*.cpp',
+            'packages/react-native/ReactCommon/**/*.h',
+            'packages/react-native/ReactCommon/**/CMakeLists.txt',
+            'private/react-native-fantom/tester/**/*.cpp',
+            'private/react-native-fantom/tester/**/*.h',
+            'private/react-native-fantom/tester/**/CMakeLists.txt'
+          ) }}
+        restore-keys: |
+          v2-ccache-fantom-${{ github.job }}-${{ github.ref }}-
+          v2-ccache-fantom-${{ github.job }}-
+          v2-ccache-fantom-
+    - name: Show ccache stats
+      shell: bash
+      run: ccache -s -v
+    - name: Run Fantom Tests
+      shell: bash
+      run: yarn fantom
+      env:
+        CC: clang
+        CXX: clang++
+    - name: Save Fantom ccache
+      if: ${{ github.ref == 'refs/heads/main' || contains(github.ref, '-stable') }}
+      uses: actions/cache/save@v4
+      with:
+        path: /github/home/.cache/ccache
+        key: v2-ccache-fantom-${{ github.job }}-${{ github.ref }}-${{ hashFiles(
+            'packages/react-native/ReactAndroid/**/*.cpp',
+            'packages/react-native/ReactAndroid/**/*.h',
+            'packages/react-native/ReactAndroid/**/CMakeLists.txt',
+            'packages/react-native/ReactCommon/**/*.cpp',
+            'packages/react-native/ReactCommon/**/*.h',
+            'packages/react-native/ReactCommon/**/CMakeLists.txt',
+            'private/react-native-fantom/tester/**/*.cpp',
+            'private/react-native-fantom/tester/**/*.h',
+            'private/react-native-fantom/tester/**/CMakeLists.txt'
+          ) }}
+    - name: Show ccache stats
+      shell: bash
+      run: ccache -s -v
+    - name: Upload test results
+      if: ${{ always() }}
+      uses: actions/upload-artifact@v4.3.4
+      with:
+        name: run-fantom-tests-results
+        compression-level: 1
+        path: |
+          private/react-native-fantom/build/reports

.github/actions/setup-node/action.yml

@@ -4,7 +4,7 @@ inputs:
   node-version:
     description: 'The node.js version to use'
     required: false
-    default: '20'
+    default: '22.14.0'
 runs:
   using: "composite"
   steps:

.github/actions/setup-xcode-build-cache/action.yml

@@ -1,38 +0,0 @@
-name: setup-xcode-build-cache
-description: Add caching to iOS jobs to speed up builds
-inputs:
-  hermes-version:
-    description: The version of hermes
-    required: true
-  jsengine:
-    dscription: The js engine in use
-    default: Hermes
-  flavor:
-    description: The flavor that is going to be built
-    default: Debug
-  architecture:
-    description: The architecture that is going to be built
-    default: NewArch
-  use-frameworks:
-    description: Whether we are bulding with DynamicFrameworks or StaticLibraries
-    default: StaticLibraries
-  ruby-version:
-    description: The ruby version we are going to use
-    default: 2.6.10
-
-runs:
-  using: composite
-  steps:
-    - name: See commands.yml with_xcodebuild_cache
-      shell: bash
-      run: echo "See commands.yml with_xcodebuild_cache"
-    - name: Cache podfile lock
-      uses: actions/cache@v4
-      with:
-        path: packages/rn-tester/Podfile.lock
-        key: v13-podfilelock-${{ github.job }}-${{ inputs.architecture }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.use-frameworks }}-${{ inputs.ruby-version }}-${{ hashfiles('packages/rn-tester/Podfile') }}-${{ inputs.hermes-version }}
-    - name: Cache cocoapods
-      uses: actions/cache@v4
-      with:
-        path: packages/rn-tester/Pods
-        key: v15-cocoapods-${{ github.job }}-${{ inputs.architecture }}-${{ inputs.jsengine }}-${{ inputs.flavor }}-${{ inputs.use-frameworks }}-${{ inputs.ruby-version }}-${{ hashfiles('packages/rn-tester/Podfile.lock') }}-${{ hashfiles('packages/rn-tester/Podfile') }}-${{ inputs.hermes-version}}

.github/actions/setup-xcode/action.yml

@@ -4,7 +4,11 @@ inputs:
   xcode-version:
     description: 'The xcode version to use'
     required: false
-    default: '15.2'
+    default: '16.2.0'
+  platform:
+    description: 'The platform to use. Valid values are: ios, ios-simulator, macos, mac-catalyst, tvos, tvos-simulator, xros, xros-simulator'
+    required: false
+    default: 'macos'
 runs:
   using: "composite"
   steps:
@@ -12,3 +16,21 @@ runs:
       uses: maxim-lobanov/setup-xcode@60606e260d2fc5762a71e64e74b2174e8ea3c8bd
       with:
         xcode-version: ${{ inputs.xcode-version }}
+    - name: Setup Platform ${{ inputs.platform }}
+      if: ${{ inputs.platform != 'macos' && inputs.platform != 'mac-catalyst' }}
+      shell: bash
+      run: |
+        # https://github.com/actions/runner-images/issues/12541
+        sudo xcodebuild -runFirstLaunch
+        sudo xcrun simctl list
+
+        # Install platform based on the platform
+        if [[ "${{ inputs.platform }}" == "xros" || "${{ inputs.platform }}" == "xros-simulator" ]]; then
+          sudo xcodebuild -downloadPlatform visionOS
+        elif [[ "${{ inputs.platform }}" == "tvos" || "${{ inputs.platform }}" == "tvos-simulator" ]]; then
+          sudo xcodebuild -downloadPlatform tvOS
+        else
+          sudo xcodebuild -downloadPlatform iOS
+        fi
+
+        sudo xcodebuild -runFirstLaunch

.github/actions/test-ios-helloworld/action.yml

@@ -1,51 +1,36 @@
 name: test-ios-helloworld
 description: Test iOS Hello World
 inputs:
-  jsengine:
-    description: Which JavaScript engine to use. Must be one of "Hermes", "JSC".
-    default: Hermes
   use-frameworks:
     description: The dependency building and linking strategy to use. Must be one of "StaticLibraries", "DynamicFrameworks"
     default: StaticLibraries
-  architecture:
-    description: The React Native architecture to Test. RNTester has always Fabric enabled, but we want to run integration test with the old arch setup. Must be one of "OldArch" or "NewArch"
-    default: OldArch
   ruby-version:
     description: The version of ruby that must be used
     default: 2.6.10
   flavor:
     description: The flavor of the build. Must be one of "Debug", "Release".
     default: Debug
-  hermes-version:
-    description: The version of hermes
-    required: true
-  react-native-version:
-    description: The version of react-native
-    required: true
 runs:
   using: composite
   steps:
     - name: Setup xcode
       uses: ./.github/actions/setup-xcode
+      with:
+        platform: ios
     - name: Setup node.js
       uses: ./.github/actions/setup-node
-    - name: Create Hermes folder
-      shell: bash
-      run: mkdir -p "$HERMES_WS_DIR"
-    - name: Download Hermes
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-darwin-bin-${{ inputs.flavor }}
-        path: /tmp/hermes/hermes-runtime-darwin/
-    - name: Print Downloaded hermes
-      shell: bash
-      run: ls -lR "$HERMES_WS_DIR"
-    - name: Run yarn
+    - name: Run yarn install
       uses: ./.github/actions/yarn-install
     - name: Setup ruby
-      uses: ruby/setup-ruby@v1.170.0
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ inputs.ruby-version }}
+    - name: Set nightly Hermes versions
+      shell: bash
+      run: |
+        node ./scripts/releases/use-hermes-nightly.js
+    - name: Run yarn install again, with the correct hermes version
+      uses: ./.github/actions/yarn-install
     - name: Download ReactNativeDependencies
       uses: actions/download-artifact@v4
       with:
@@ -54,46 +39,39 @@ runs:
     - name: Print third-party folder
       shell: bash
       run: ls -lR /tmp/third-party
-    - name: Install iOS dependencies - Configuration ${{ inputs.flavor }}; New Architecture ${{ inputs.architecture }}; JS Engine ${{ inputs.jsengine }}
+    - name: Download React Native Prebuilds
+      uses: actions/download-artifact@v4
+      with:
+        name: ReactCore${{ inputs.flavor }}.xcframework.tar.gz
+        path: /tmp/ReactCore
+    - name: Print ReactCore folder
+      shell: bash
+      run: ls -lR /tmp/ReactCore
+    - name: Install iOS dependencies - Configuration ${{ inputs.flavor }};
       shell: bash
       run: |
-        cd packages/helloworld
+        cd private/helloworld
         args=()
 
-        if [[ ${{ inputs.architecture }} == "OldArch" ]]; then
-          args+=(--arch old)
-        fi
-
         if [[ ${{ inputs.use-frameworks }} == "DynamicFrameworks" ]]; then
           args+=(--frameworks dynamic)
         fi
 
-        if [[ ${{ inputs.jsengine }} == "JSC" ]]; then
-          args+=(--jsvm jsc)
-          yarn bootstrap ios "${args[@]}" | cat
-        else
-          # Tarball is restored with capital flavors suffix, but somehow the tarball name from JS at line 96 returns as lowercased.
-          # Let's ensure that the tarballs have the right names
+        export RCT_USE_LOCAL_RN_DEP="/tmp/third-party/ReactNativeDependencies${{ inputs.flavor }}.xcframework.tar.gz"
+        export RCT_TESTONLY_RNCORE_TARBALL_PATH="/tmp/ReactCore/ReactCore${{ inputs.flavor }}.xcframework.tar.gz"
 
-          if [[ -f "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-Debug.tar.gz" ]]; then
-            mv "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-Debug.tar.gz" "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-debug.tar.gz"
-          fi
+        yarn bootstrap ios "${args[@]}" | cat
 
-          if [[ -f "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-Release.tar.gz" ]]; then
-            mv "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-Release.tar.gz" "$HERMES_WS_DIR/hermes-runtime-darwin/hermes-ios-release.tar.gz"
-          fi
-
-          BUILD_TYPE="${{ inputs.flavor }}"
-          TARBALL_FILENAME=$(node ../react-native/scripts/hermes/get-tarball-name.js --buildType "$BUILD_TYPE")
-          export HERMES_ENGINE_TARBALL_PATH="$HERMES_WS_DIR/hermes-runtime-darwin/$TARBALL_FILENAME"
-          export RCT_USE_LOCAL_RN_DEP="/tmp/third-party/ReactNativeDependencies${{ inputs.flavor }}.xcframework.tar.gz"
-
-          yarn bootstrap ios "${args[@]}" | cat
-        fi
-    - name: Build HelloWorld  project
+    - name: Run Helloworld tests
       shell: bash
       run: |
-        cd packages/helloworld
+        cd private/helloworld
+        yarn test
+
+    - name: Build HelloWorld project
+      shell: bash
+      run: |
+        cd private/helloworld
 
         args=()
         if [[ ${{ inputs.flavor }} == "Release" ]]; then

.github/actions/test-ios-rntester/action.yml

@@ -1,33 +1,18 @@
 name: test-ios-rntester
 description: Test iOS RNTester
 inputs:
-  jsengine:
-    description: Which JavaScript engine to use. Must be one of "Hermes", "JSC".
-    default: Hermes
   use-frameworks:
     description: The dependency building and linking strategy to use. Must be one of "StaticLibraries", "DynamicFrameworks"
     default: StaticLibraries
-  architecture:
-    description: The React Native architecture to Test. RNTester has always Fabric enabled, but we want to run integration test with the old arch setup
-    default: NewArch
   ruby-version:
     description: The version of ruby that must be used
     default: 2.6.10
   run-unit-tests:
     description: whether unit tests should run or not.
     default: "false"
-  hermes-tarball-artifacts-dir:
-    description: The directory where the hermes tarball artifacts are stored
-    default: /tmp/hermes/hermes-runtime-darwin
   flavor:
     description: The flavor of the build. Must be one of "Debug", "Release".
     default: Debug
-  hermes-version:
-    description: The version of hermes
-    required: true
-  react-native-version:
-    description: The version of react-native
-    required: true
   run-e2e-tests:
     description: Whether we want to run E2E tests or not
     required: false
@@ -38,60 +23,25 @@ runs:
   steps:
     - name: Setup xcode
       uses: ./.github/actions/setup-xcode
+      with:
+        platform: ios
     - name: Setup node.js
       uses: ./.github/actions/setup-node
     - name: Run yarn
       uses: ./.github/actions/yarn-install
-    - name: Download Hermes
-      uses: actions/download-artifact@v4
-      with:
-        name: hermes-darwin-bin-${{ inputs.flavor }}
-        path: ${{ inputs.hermes-tarball-artifacts-dir }}
     - name: Setup ruby
-      uses: ruby/setup-ruby@v1.170.0
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ inputs.ruby-version }}
+    - name: Set nightly Hermes versions
+      shell: bash
+      run: |
+        node ./scripts/releases/use-hermes-nightly.js
+    - name: Run yarn install again, with the correct hermes version
+      uses: ./.github/actions/yarn-install
     - name: Prepare IOS Tests
       if: ${{ inputs.run-unit-tests == 'true' }}
       uses: ./.github/actions/prepare-ios-tests
-    - name: Set HERMES_ENGINE_TARBALL_PATH envvar if Hermes tarball is present
-      shell: bash
-      run: |
-        HERMES_TARBALL_ARTIFACTS_DIR=${{ inputs.hermes-tarball-artifacts-dir }}
-        if [ ! -d $HERMES_TARBALL_ARTIFACTS_DIR ]; then
-          echo "Hermes tarball artifacts dir not present ($HERMES_TARBALL_ARTIFACTS_DIR). Build Hermes from source."
-          exit 0
-        fi
-
-        TARBALL_FILENAME=$(node ./packages/react-native/scripts/hermes/get-tarball-name.js --buildType "${{ inputs.flavor }}")
-        TARBALL_PATH=$HERMES_TARBALL_ARTIFACTS_DIR/$TARBALL_FILENAME
-
-        echo "Looking for $TARBALL_FILENAME in $HERMES_TARBALL_ARTIFACTS_DIR"
-        echo "$TARBALL_PATH"
-
-        if [ ! -f $TARBALL_PATH ]; then
-          echo "Hermes tarball not present ($TARBALL_PATH). Build Hermes from source."
-          exit 0
-        fi
-
-        echo "Found Hermes tarball at $TARBALL_PATH"
-        echo "HERMES_ENGINE_TARBALL_PATH=$TARBALL_PATH" >> $GITHUB_ENV
-    - name: Print Hermes version
-      shell: bash
-      run: |
-        HERMES_TARBALL_ARTIFACTS_DIR=${{ inputs.hermes-tarball-artifacts-dir }}
-        TARBALL_FILENAME=$(node ./packages/react-native/scripts/hermes/get-tarball-name.js --buildType "${{ inputs.flavor }}")
-        TARBALL_PATH=$HERMES_TARBALL_ARTIFACTS_DIR/$TARBALL_FILENAME
-        if [[ -e $TARBALL_PATH ]]; then
-          tar -xf $TARBALL_PATH
-          echo 'print(HermesInternal?.getRuntimeProperties?.()["OSS Release Version"])' > test.js
-          chmod +x ./destroot/bin/hermes
-          ./destroot/bin/hermes test.js
-          rm test.js
-          rm -rf destroot
-        else
-          echo 'No Hermes tarball found.'
-        fi
     - name: Download ReactNativeDependencies
       uses: actions/download-artifact@v4
       with:
@@ -100,37 +50,28 @@ runs:
     - name: Print third-party folder
       shell: bash
       run: ls -lR /tmp/third-party
-    - name: Setup xcode build cache
-      uses: ./.github/actions/setup-xcode-build-cache
+    - name: Download React Native Prebuilds
+      uses: actions/download-artifact@v4
       with:
-        hermes-version: ${{ inputs.hermes-version }}
-        jsengine: ${{ inputs.jsengine }}
-        architecture: ${{ inputs.architecture }}
-        use-frameworks: ${{ inputs.use-frameworks }}
-        flavor: ${{ inputs.flavor }}
-        ruby-version: ${{ inputs.ruby-version }}
+        name: ReactCore${{ inputs.flavor }}.xcframework.tar.gz
+        path: /tmp/ReactCore
+    - name: Print ReactCore folder
+      shell: bash
+      run: ls -lR /tmp/ReactCore
     - name: Install CocoaPods dependencies
       shell: bash
       run: |
-        if [[ ${{ inputs.jsengine }} == "JSC" ]]; then
-          export USE_HERMES=0
-        else
-          export HERMES_ENGINE_TARBALL_PATH=$HERMES_ENGINE_TARBALL_PATH
-        fi
+        export RCT_USE_LOCAL_RN_DEP="/tmp/third-party/ReactNativeDependencies${{ inputs.flavor }}.xcframework.tar.gz"
+        export RCT_TESTONLY_RNCORE_TARBALL_PATH="/tmp/ReactCore/ReactCore${{ inputs.flavor }}.xcframework.tar.gz"
 
         if [[ ${{ inputs.use-frameworks }} == "DynamicFrameworks" ]]; then
           export USE_FRAMEWORKS=dynamic
         fi
 
-        if [[ ${{ inputs.architecture }} == "OldArch" ]]; then
-          export RCT_NEW_ARCH_ENABLED=0
-        fi
-
-        export RCT_USE_LOCAL_RN_DEP="/tmp/third-party/ReactNativeDependencies${{ inputs.flavor }}.xcframework.tar.gz"
         cd packages/rn-tester
 
         bundle install
-        bundle exec pod install
+        bundle exec pod update hermes-engine --no-repo-update
     - name: Build RNTester
       shell: bash
       run: |
@@ -170,7 +111,7 @@ runs:
       if: ${{ inputs.use-frameworks == 'StaticLibraries' && inputs.ruby-version == '2.6.10' }} # This is needed to avoid conflicts with the artifacts
       uses: actions/upload-artifact@v4.3.4
       with:
-        name: RNTesterApp-${{ inputs.architecture }}-${{ inputs.jsengine }}-${{ inputs.flavor }}
+        name: RNTesterApp-NewArch-${{ inputs.flavor }}
         path: ${{ env.app-path }}
     - name: Store test results
       if: ${{ inputs.run-unit-tests == 'true' }}

.github/actions/test-js/action.yml

@@ -4,7 +4,7 @@ inputs:
   node-version:
     description: "The node.js version to use"
     required: false
-    default: "20"
+    default: "22"
 runs:
   using: composite
   steps:

.github/actions/test-library-on-nightly/action.yml

@@ -1,46 +0,0 @@
-name: test-library-on-nightly
-description: Tests a library on a nightly
-inputs:
-  library-npm-package:
-    description: The library npm package to add
-    required: true
-  platform:
-    description: whether we want to build for iOS or Android
-    required: true
-runs:
-  using: composite
-  steps:
-    - name: Create new app
-      shell: bash
-      run: |
-        cd /tmp
-        npx @react-native-community/cli init RNApp --skip-install --version nightly
-    - name: Add library
-      shell: bash
-      run: |
-        cd /tmp/RNApp
-        yarn add ${{ inputs.library-npm-package }}
-
-    - name: Build iOS
-      shell: bash
-      if: ${{ inputs.platform == 'ios' }}
-      run: |
-        cd /tmp/RNApp/ios
-        bundle install
-        bundle exec pod install
-        xcodebuild build \
-          -workspace RNApp.xcworkspace \
-          -scheme RNApp \
-          -sdk iphonesimulator
-    - name: Setup Java for Android
-      if: ${{ inputs.platform == 'android' }}
-      uses: actions/setup-java@v2
-      with:
-        java-version: '17'
-        distribution: 'zulu'
-    - name: Build Android
-      shell: bash
-      if: ${{ inputs.platform == 'android' }}
-      run: |
-        cd /tmp/RNApp/android
-        ./gradlew assembleDebug

.github/workflow-scripts/__tests__/createDraftRelease-test.js

@@ -121,7 +121,7 @@ describe('Create Draft Release', () => {
   });
 
   describe('#_computeBody', () => {
-    it('computes body for release', async () => {
+    it('computes body for release when no hermes versions are passed', async () => {
       const version = '0.77.1';
       const changelog = `## v${version}
 ### Breaking Changes
@@ -134,20 +134,83 @@ describe('Create Draft Release', () => {
 #### iOS
 - [PR #3436](https://github.com/facebook/react-native/pull/3436) - Some other change
 - [PR #3437](https://github.com/facebook/react-native/pull/3437) - Some other change`;
-      const body = _computeBody(version, changelog);
+      const body = _computeBody(changelog, version);
 
       expect(body).toEqual(`${changelog}
 
 ---
 
 Hermes dSYMS:
-- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-hermes-framework-dSYM-debug.tar.gz)
-- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-hermes-framework-dSYM-release.tar.gz)
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${version}/hermes-ios-${version}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${version}/hermes-ios-${version}-hermes-framework-dSYM-release.tar.gz)
+
+Hermes V1 dSYMS:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${version}/hermes-ios-${version}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${version}/hermes-ios-${version}-hermes-framework-dSYM-release.tar.gz)
 
 ReactNativeDependencies dSYMs:
 - [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-debug.tar.gz)
 - [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-release.tar.gz)
 
+ReactNative Core dSYMs:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-release.tar.gz)
+
+---
+
+You can file issues or pick requests against this release [here](https://github.com/reactwg/react-native-releases/issues/new/choose).
+
+---
+
+To help you upgrade to this version, you can use the [Upgrade Helper](https://react-native-community.github.io/upgrade-helper/) ⚛️.
+
+---
+
+View the whole changelog in the [CHANGELOG.md file](https://github.com/facebook/react-native/blob/main/CHANGELOG.md).`);
+    });
+
+    it('computes body for release when hermes versions are passed', async () => {
+      const version = '0.77.1';
+      const hermesVersion = '0.15.0';
+      const hermesV1Version = '250829098.0.2';
+      const changelog = `## v${version}
+### Breaking Changes
+- [PR #9012](https://github.com/facebook/react-native/pull/9012) - Some other change
+
+#### Android
+- [PR #3456](https://github.com/facebook/react-native/pull/3456) - Some other change
+- [PR #3457](https://github.com/facebook/react-native/pull/3457) - Some other change
+
+#### iOS
+- [PR #3436](https://github.com/facebook/react-native/pull/3436) - Some other change
+- [PR #3437](https://github.com/facebook/react-native/pull/3437) - Some other change`;
+      const body = _computeBody(
+        changelog,
+        version,
+        hermesVersion,
+        hermesV1Version,
+      );
+
+      expect(body).toEqual(`${changelog}
+
+---
+
+Hermes dSYMS:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesVersion}/hermes-ios-${hermesVersion}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesVersion}/hermes-ios-${hermesVersion}-hermes-framework-dSYM-release.tar.gz)
+
+Hermes V1 dSYMS:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesV1Version}/hermes-ios-${hermesV1Version}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesV1Version}/hermes-ios-${hermesV1Version}-hermes-framework-dSYM-release.tar.gz)
+
+ReactNativeDependencies dSYMs:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-release.tar.gz)
+
+ReactNative Core dSYMs:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-release.tar.gz)
+
 ---
 
 You can file issues or pick requests against this release [here](https://github.com/reactwg/react-native-releases/issues/new/choose).
@@ -188,6 +251,7 @@ View the whole changelog in the [CHANGELOG.md file](https://github.com/facebook/
           status: 201,
           json: () =>
             Promise.resolve({
+              id: 1,
               html_url:
                 'https://github.com/facebook/react-native/releases/tag/v0.77.1',
             }),
@@ -208,9 +272,11 @@ View the whole changelog in the [CHANGELOG.md file](https://github.com/facebook/
           body: fetchBody,
         },
       );
-      expect(response).toEqual(
-        'https://github.com/facebook/react-native/releases/tag/v0.77.1',
-      );
+      expect(response).toEqual({
+        id: 1,
+        html_url:
+          'https://github.com/facebook/react-native/releases/tag/v0.77.1',
+      });
     });
 
     it('creates a draft release for prerelease on GitHub', async () => {
@@ -238,6 +304,7 @@ View the whole changelog in the [CHANGELOG.md file](https://github.com/facebook/
           status: 201,
           json: () =>
             Promise.resolve({
+              id: 1,
               html_url:
                 'https://github.com/facebook/react-native/releases/tag/v0.77.1',
             }),
@@ -258,9 +325,11 @@ View the whole changelog in the [CHANGELOG.md file](https://github.com/facebook/
           body: fetchBody,
         },
       );
-      expect(response).toEqual(
-        'https://github.com/facebook/react-native/releases/tag/v0.77.1',
-      );
+      expect(response).toEqual({
+        id: 1,
+        html_url:
+          'https://github.com/facebook/react-native/releases/tag/v0.77.1',
+      });
     });
 
     it('throws if the post failes', async () => {

.github/workflow-scripts/__tests__/publishTemplate-test.js

@@ -117,13 +117,13 @@ describe('#verifyPublishedTemplate', () => {
     it('will timeout if npm does not update package version after a set number of retries', async () => {
       const RETRIES = 2;
 
-      await verifyPublishedTemplate('0.77.0', true, RETRIES),
+      (await verifyPublishedTemplate('0.77.0', true, RETRIES),
         expect(mockVerifyPublishedPackage).toHaveBeenCalledWith(
           '@react-native-community/template',
           '0.77.0',
           'latest',
           2,
-        );
+        ));
     });
   });
 });

.github/workflow-scripts/__tests__/verifyArtifactsAreOnMaven-test.js

@@ -38,7 +38,7 @@ describe('#verifyArtifactsAreOnMaven', () => {
 
     expect(mockSleep).toHaveBeenCalledTimes(1);
     expect(mockFetch).toHaveBeenCalledWith(
-      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1',
+      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1/react-native-artifacts-0.78.1.pom',
     );
   });
 
@@ -55,7 +55,7 @@ describe('#verifyArtifactsAreOnMaven', () => {
 
     expect(mockSleep).toHaveBeenCalledTimes(1);
     expect(mockFetch).toHaveBeenCalledWith(
-      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1',
+      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1/react-native-artifacts-0.78.1.pom',
     );
   });
 
@@ -67,7 +67,7 @@ describe('#verifyArtifactsAreOnMaven', () => {
 
     expect(mockSleep).toHaveBeenCalledTimes(0);
     expect(mockFetch).toHaveBeenCalledWith(
-      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1',
+      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1/react-native-artifacts-0.78.1.pom',
     );
   });
 
@@ -81,7 +81,7 @@ describe('#verifyArtifactsAreOnMaven', () => {
     expect(mockSleep).toHaveBeenCalledTimes(90);
     expect(mockExit).toHaveBeenCalledWith(1);
     expect(mockFetch).toHaveBeenCalledWith(
-      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1',
+      'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/0.78.1/react-native-artifacts-0.78.1.pom',
     );
   });
 });

.github/workflow-scripts/__tests__/verifyReleaseOnNpm-test.js

@@ -83,13 +83,13 @@ describe('#verifyReleaseOnNPM', () => {
     it('will timeout if npm does not update package version after a set number of retries', async () => {
       const RETRIES = 2;
 
-      await verifyReleaseOnNpm('0.77.0', true, RETRIES),
+      (await verifyReleaseOnNpm('0.77.0', true, RETRIES),
         expect(mockVerifyPublishedPackage).toHaveBeenCalledWith(
           'react-native',
           '0.77.0',
           'latest',
           2,
-        );
+        ));
     });
 
     it('will timeout if npm does not update latest tag after a set number of retries', async () => {

.github/workflow-scripts/actOnLabel.js

@@ -95,12 +95,6 @@ module.exports = async (github, context, labelWithContext) => {
       );
       await requestAuthorFeedback();
       return;
-    case 'Newer Patch Available':
-      await addComment(
-        `> [!TIP]\n` +
-          `> **Newer version available**: You are on a supported minor version, but it looks like there's a newer patch available - ${labelWithContext.newestPatch}. Please [upgrade](https://reactnative.dev/docs/upgrading) to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.`,
-      );
-      return;
     case 'Needs: Version Info':
       await addComment(
         `> [!WARNING]\n` +

.github/workflow-scripts/analyze_code.sh

@@ -4,12 +4,16 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
-GITHUB_OWNER=-facebook
-GITHUB_REPO=-react-native
-export GITHUB_OWNER
-export GITHUB_REPO
+export GITHUB_OWNER=-facebook
+export GITHUB_REPO=-react-native
 
-cat <(echo eslint; npm run lint --silent -- --format=json; echo flow; npm run flow-check --silent --json; echo google-java-format; node scripts/lint-java.js --diff) | node packages/react-native-bots/code-analysis-bot.js
+{
+  echo eslint
+  npm run lint --silent -- --format=json
+
+  echo flow
+  npm run flow-check --silent --json
+} | node private/react-native-bots/code-analysis-bot.js
 
 STATUS=$?
 if [ $STATUS == 0 ]; then
@@ -17,3 +21,4 @@ if [ $STATUS == 0 ]; then
 else
   echo "Code analysis failed, error status $STATUS."
 fi
+exit $STATUS

.github/workflow-scripts/collectNightlyOutcomes.js

@@ -1,76 +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.
- *
- * @format
- */
-
-const fs = require('fs');
-const path = require('path');
-
-function readOutcomes() {
-  const baseDir = '/tmp';
-  let outcomes = [];
-  fs.readdirSync(baseDir).forEach(file => {
-    const fullPath = path.join(baseDir, file);
-    if (fullPath.endsWith('outcome') && fs.statSync(fullPath).isDirectory) {
-      fs.readdirSync(fullPath).forEach(subFile => {
-        const subFullPath = path.join(fullPath, subFile);
-        if (subFullPath.endsWith('outcome')) {
-          const [library, status] = String(fs.readFileSync(subFullPath, 'utf8'))
-            .trim()
-            .split(':');
-          const platform = subFile.includes('android') ? 'Android' : 'iOS';
-          console.log(
-            `[${platform}] ${library} completed with status ${status}`,
-          );
-          outcomes.push({
-            library: library.trim(),
-            platform,
-            status: status.trim(),
-          });
-        }
-      });
-    } else if (fullPath.endsWith('outcome')) {
-      const [library, status] = String(fs.readFileSync(fullPath, 'utf8'))
-        .trim()
-        .split(':');
-      const platform = file.includes('android') ? 'Android' : 'iOS';
-      console.log(`[${platform}] ${library} completed with status ${status}`);
-      outcomes.push({
-        library: library.trim(),
-        platform,
-        status: status.trim(),
-      });
-    }
-  });
-  return outcomes;
-}
-
-function printFailures(outcomes) {
-  console.log('Printing failures...');
-  let failures = 0;
-  outcomes.forEach(entry => {
-    if (entry.status !== 'success') {
-      console.log(
-        `❌ [${entry.platform}] ${entry.library} failed with status ${entry.status}`,
-      );
-      failures++;
-    }
-  });
-  return failures > 0;
-}
-
-function collectResults() {
-  const outcomes = readOutcomes();
-  const failures = printFailures(outcomes);
-  if (failures) {
-    process.exit(1);
-  }
-  console.log('✅ All tests passed!');
-}
-module.exports = {
-  collectResults,
-};

.github/workflow-scripts/createDraftRelease.js

@@ -40,19 +40,29 @@ function _extractChangelog(version) {
   return changelog.slice(changelogStarts, changelogEnds).join('\n').trim();
 }
 
-function _computeBody(version, changelog) {
+function _computeBody(changelog, version, hermesVersion, hermesV1Version) {
+  hermesVersion = hermesVersion ?? version;
+  hermesV1Version = hermesV1Version ?? version;
   return `${changelog}
 
 ---
 
 Hermes dSYMS:
-- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-hermes-framework-dSYM-debug.tar.gz)
-- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-hermes-framework-dSYM-release.tar.gz)
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesVersion}/hermes-ios-${hermesVersion}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesVersion}/hermes-ios-${hermesVersion}-hermes-framework-dSYM-release.tar.gz)
+
+Hermes V1 dSYMS:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesV1Version}/hermes-ios-${hermesV1Version}-hermes-framework-dSYM-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/hermes/hermes-ios/${hermesV1Version}/hermes-ios-${hermesV1Version}-hermes-framework-dSYM-release.tar.gz)
 
 ReactNativeDependencies dSYMs:
 - [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-debug.tar.gz)
 - [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-dependencies-dSYM-release.tar.gz)
 
+ReactNative Core dSYMs:
+- [Debug](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-debug.tar.gz)
+- [Release](https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/${version}/react-native-artifacts-${version}-reactnative-core-release.tar.gz)
+
 ---
 
 You can file issues or pick requests against this release [here](https://github.com/reactwg/react-native-releases/issues/new/choose).
@@ -101,7 +111,11 @@ async function _createDraftReleaseOnGitHub(version, body, latest, token) {
   }
 
   const data = await response.json();
-  return data.html_url;
+  const {html_url, id} = data;
+  return {
+    html_url,
+    id,
+  };
 }
 
 function moveToChangelogBranch(version) {
@@ -109,7 +123,13 @@ function moveToChangelogBranch(version) {
   run(`git checkout -b changelog/v${version}`);
 }
 
-async function createDraftRelease(version, latest, token) {
+async function createDraftRelease(
+  version,
+  latest,
+  token,
+  hermesVersion,
+  hermesV1Version,
+) {
   if (version.startsWith('v')) {
     version = version.substring(1);
   }
@@ -117,14 +137,15 @@ async function createDraftRelease(version, latest, token) {
   _verifyTagExists(version);
   moveToChangelogBranch(version);
   const changelog = _extractChangelog(version);
-  const body = _computeBody(version, changelog);
+  const body = _computeBody(changelog, version, hermesVersion, hermesV1Version);
   const release = await _createDraftReleaseOnGitHub(
     version,
     body,
     latest,
     token,
   );
-  log(`Created draft release: ${release}`);
+  log(`Created draft release: ${release.html_url}, ID ${release.id}`);
+  return release;
 }
 
 module.exports = {

.github/workflow-scripts/extractIssueOncalls.js

@@ -25,6 +25,31 @@ function extractUsersFromScheduleAndDate(schedule, userMap, date) {
   return [user1, user2];
 }
 
+/**
+ * You can invoke this script by doing:
+ * ```
+ * node .github/workflow-scripts/extractIssueOncalls.js $DATA
+ * ```
+ *
+ * the $DATA is stored in the github secrets as ONCALL_SCHEDULE variable.
+ * The format of the data is:
+ * ```
+ * {
+ *   \"userMap\": {
+ *     \"discord_handle1\": \"discord_id1\",
+ *     \"discord_handle2\": \"discord_id2\",
+ *    ...
+ *  },
+ *  \"schedule\": {
+ *    \"2025-07-29\": [\"discord_handle1\", \"discord_handle2\"],
+ *    \"2025-08-05\": [\"discord_handle3\", \"discord_handle4\"],
+ *   ...
+ * }
+ * ```
+ *
+ * When uploading the secret, make sure that the JSON strings are escaped!
+ * The script will fail otherwise, because GitHub will remove the `"` characters.
+ */
 function main() {
   const configuration = process.argv[2];
   const {userMap, schedule} = JSON.parse(configuration);

.github/workflow-scripts/maestro-ios.js

@@ -87,11 +87,11 @@ async function launchAppOnSimulator(appId, udid, isDebug) {
 
 function startVideoRecording(jsengine, currentAttempt) {
   console.log(
-    `Start video record using pid: video_record_${jsengine}_${currentAttempt}.pid`,
+    `Start video record using pid: video_record_${currentAttempt}.pid`,
   );
 
   const recordingArgs =
-    `simctl io booted recordVideo video_record_${jsengine}_${currentAttempt}.mov`.split(
+    `simctl io booted recordVideo video_record_${currentAttempt}.mov`.split(
       ' ',
     );
   const recordingProcess = childProcess.spawn('xcrun', recordingArgs, {
@@ -162,7 +162,7 @@ async function main() {
   console.info(`WORKING_DIRECTORY: ${WORKING_DIRECTORY}`);
   console.info('==============================\n');
 
-  const simulatorName = 'iPhone 15 Pro';
+  const simulatorName = 'iPhone 16 Pro';
   launchSimulator(simulatorName);
   installAppOnSimulator(APP_PATH);
   const udid = extractSimulatorUDID();

.github/workflow-scripts/verifyArtifactsAreOnMaven.js

@@ -13,13 +13,14 @@ const SLEEP_S = 60; // 1 minute
 const MAX_RETRIES = 90; // 90 attempts. Waiting between attempt: 1 min. Total time: 90 min.
 const ARTIFACT_URL =
   'https://repo1.maven.org/maven2/com/facebook/react/react-native-artifacts/';
+const ARTIFACT_NAME = 'react-native-artifacts-';
 
 async function verifyArtifactsAreOnMaven(version, retries = MAX_RETRIES) {
   if (version.startsWith('v')) {
     version = version.substring(1);
   }
 
-  const artifactUrl = `${ARTIFACT_URL}${version}`;
+  const artifactUrl = `${ARTIFACT_URL}${version}/${ARTIFACT_NAME}${version}.pom`;
   for (let currentAttempt = 1; currentAttempt <= retries; currentAttempt++) {
     const response = await fetch(artifactUrl);
 

.github/workflow-scripts/verifyVersion.js

@@ -45,18 +45,6 @@ module.exports = async (github, context) => {
   if (!isVersionSupported(issueVersion, latestVersion)) {
     return {label: 'Type: Unsupported Version'};
   }
-
-  // We want to encourage users to repro the issue on the highest available patch for the given minor.
-  const latestPatchForVersion = getLatestPatchForVersion(
-    issueVersion,
-    recentReleases,
-  );
-  if (latestPatchForVersion > issueVersion.patch) {
-    return {
-      label: 'Newer Patch Available',
-      newestPatch: `${issueVersion.major}.${issueVersion.minor}.${latestPatchForVersion}`,
-    };
-  }
 };
 
 /**
@@ -87,22 +75,6 @@ function isVersionTooOld(actualVersion, latestVersion) {
   );
 }
 
-// Assumes that releases are sorted in the order of recency (i.e. most recent releases are earlier in the list)
-// This enables us to stop looking as soon as we find the first release with a matching major/minor version, since
-// we know it's the most recent release, therefore the highest patch available.
-function getLatestPatchForVersion(version, releases) {
-  for (releaseName of releases) {
-    const release = parseVersionFromString(releaseName);
-    if (
-      release &&
-      release.major == version.major &&
-      release.minor == version.minor
-    ) {
-      return release.patch;
-    }
-  }
-}
-
 function getReactNativeVersionFromIssueBodyIfExists(issue) {
   if (!issue || !issue.body) return;
   const rnVersionRegex = /React Native Version[\r\n]+(?<version>.+)[\r\n]*/;

.github/workflows/bump-podfile-lock.yml

@@ -18,6 +18,10 @@ jobs:
         run: |
           git config --local user.email "bot@reactnative.dev"
           git config --local user.name "React Native Bot"
+      - name: Setup xcode
+        uses: ./.github/actions/setup-xcode
+        with:
+          platform: 'ios'
       - name: Extract branch name
         run: |
           TAG="${{ github.ref_name }}";

.github/workflows/cache-reaper.yml

@@ -14,7 +14,7 @@ jobs:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - uses: actions/checkout@v4
-      - name: Use Node.js 18
-        uses: actions/setup-node@v4
+      - name: Setup Node.js
+        uses: ./.github/actions/setup-node
       - name: Trim the cache
         run: node scripts/clean-gha-cache.js

.github/workflows/check-nightly.yml

@@ -1,32 +0,0 @@
-# This jobs runs every day 2 hours after the nightly job and its purpose is to report
-# a failure in case the nightly failed to be published. We are going to hook this to an internal automation.
-name: Check Nigthlies
-
-on:
-  workflow_dispatch:
-  # nightly build @ 4:15 AM UTC
-  schedule:
-    - cron: '15 4 * * *'
-
-jobs:
-  check-nightly:
-    runs-on: ubuntu-latest
-    if: github.repository == 'facebook/react-native'
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Check nightly
-        run: |
-          TODAY=$(date "+%Y%m%d")
-          echo "Checking nightly for $TODAY"
-          NIGHTLY="$(npm view react-native | grep $TODAY)"
-          if [[ -z $NIGHTLY ]]; then
-            echo 'Nightly job failed.'
-            exit 1
-          else
-            echo 'Nightly Worked, All Good!'
-          fi
-
-  test-libraries:
-    uses: ./.github/workflows/test-libraries-on-nightlies.yml
-    needs: check-nightly

.github/workflows/create-draft-release.yml

@@ -2,6 +2,15 @@ name: Create Draft Release
 
 on:
   workflow_call:
+    inputs:
+      hermesVersion:
+        required: false
+        type: string
+        description: The version of Hermes to use for this release (eg. 0.15.0). If not specified, it will use React Native Version
+      hermesV1Version:
+        required: false
+        type: string
+        description: The version of Hermes V1 to use for this release (eg. 250829098.0.2). If not specified, it will use React Native Version
 
 jobs:
   create-draft-release:
@@ -21,9 +30,24 @@ jobs:
           git config --local user.name "React Native Bot"
       - name: Create draft release
         uses: actions/github-script@v6
+        id: create-draft-release
         with:
           script: |
             const {createDraftRelease} = require('./.github/workflow-scripts/createDraftRelease.js');
-            const version = ${{ github.ref_name }}';
+            const version = '${{ github.ref_name }}';
             const {isLatest} = require('./.github/workflow-scripts/publishTemplate.js');
-            await createDraftRelease(version, isLatest(), '${{secrets.REACT_NATIVE_BOT_GITHUB_TOKEN}}');
+            return (await createDraftRelease(version, isLatest(), '${{secrets.REACT_NATIVE_BOT_GITHUB_TOKEN}}', ${{ inputs.hermesVersion }}, ${{ inputs.hermesV1Version }})).id;
+          result-encoding: string
+      - name: Upload release assets for DotSlash
+        uses: actions/github-script@v6
+        env:
+          RELEASE_ID: ${{ steps.create-draft-release.outputs.result }}
+        with:
+          script: |
+            const {uploadReleaseAssetsForDotSlashFiles} = require('./scripts/releases/upload-release-assets-for-dotslash.js');
+            const version = '${{ github.ref_name }}';
+            await uploadReleaseAssetsForDotSlashFiles({
+              version,
+              token: '${{secrets.REACT_NATIVE_BOT_GITHUB_TOKEN}}',
+              releaseId: process.env.RELEASE_ID,
+            });

.github/workflows/create-release.yml

@@ -19,6 +19,7 @@ on:
 
 jobs:
   create_release:
+    if: github.repository == 'facebook/react-native'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.github/workflows/danger-pr.yml

@@ -18,10 +18,14 @@ jobs:
     if: github.repository == 'facebook/react-native'
     steps:
       - uses: actions/checkout@v4
+      - name: Setup Node.js
+        uses: ./.github/actions/setup-node
       - name: Run yarn install
         uses: ./.github/actions/yarn-install
+      - name: Run diff-js-api-breaking-changes
+        uses: ./.github/actions/diff-js-api-breaking-changes
       - name: Danger
         run: yarn danger ci --use-github-checks --failOnErrors
-        working-directory: packages/react-native-bots
+        working-directory: private/react-native-bots
         env:
           DANGER_GITHUB_API_TOKEN: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}

.github/workflows/monitor-new-issues.yml

@@ -12,13 +12,12 @@ on:
 jobs:
   monitor-issues:
     runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
+        uses: ./.github/actions/setup-node
       - name: Install dependencies
         uses:  ./.github/actions/yarn-install
       - name: Extract next oncall
@@ -28,10 +27,6 @@ jobs:
           ONCALL2=$(echo $ONCALLS | cut -d ' ' -f 2)
           echo "oncall1=$ONCALL1" >> $GITHUB_ENV
           echo "oncall2=$ONCALL2" >> $GITHUB_ENV
-      - name: Print oncalls
-        run: |
-          echo "oncall1: ${{ env.oncall1 }}"
-          echo "oncall2: ${{ env.oncall2 }}"
       - name: Monitor New Issues
         uses: react-native-community/repo-monitor@v1.0.1
         with:

.github/workflows/nightly.yml

@@ -21,125 +21,21 @@ jobs:
           echo "Setting release type to nightly"
           echo "RELEASE_TYPE=nightly" >> $GITHUB_OUTPUT
 
-  prepare_hermes_workspace:
-    runs-on: ubuntu-latest
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
-    outputs:
-      react-native-version: ${{ steps.prepare-hermes-workspace.outputs.react-native-version }}
-      hermes-version: ${{ steps.prepare-hermes-workspace.outputs.hermes-version }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Prepare Hermes Workspace
-        id: prepare-hermes-workspace
-        uses: ./.github/actions/prepare-hermes-workspace
-        with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
-          hermes-version-file: ${{ env.HERMES_VERSION_FILE }}
-
-  build_hermesc_apple:
-    runs-on: macos-13
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - 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 }}
-
-  build_apple_slices_hermes:
-    runs-on: macos-14
-    needs: [build_hermesc_apple, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-      HERMES_OSXBIN_ARTIFACTS_DIR: /tmp/hermes/osx-bin
-      IOS_DEPLOYMENT_TARGET: "15.1"
-      XROS_DEPLOYMENT_TARGET: "1.0"
-      MAC_DEPLOYMENT_TARGET: "10.15"
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-        slice: [macosx, iphoneos, iphonesimulator, appletvos, appletvsimulator, catalyst, xros, xrsimulator]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Slice
-        uses: ./.github/actions/build-apple-slices-hermes
-        with:
-          flavor: ${{ matrix.flavor }}
-          slice: ${{ matrix.slice}}
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_hermes_macos:
-    runs-on: macos-13
-    needs: [build_apple_slices_hermes, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Hermes MacOS
-        uses: ./.github/actions/build-hermes-macos
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-          flavor: ${{ matrix.flavor }}
-
   prebuild_apple_dependencies:
-    uses: ./.github/workflows/prebuild-ios.yml
+    if: github.repository == 'facebook/react-native'
+    uses: ./.github/workflows/prebuild-ios-dependencies.yml
     secrets: inherit
 
-  build_hermesc_linux:
-    runs-on: ubuntu-latest
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Linux
-        uses: ./.github/actions/build-hermesc-linux
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_hermesc_windows:
-    runs-on: windows-2019
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
-      ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
-      MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
-      CMAKE_DIR: 'C:\Program Files\CMake\bin'
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Windows
-        uses: ./.github/actions/build-hermesc-windows
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+  prebuild_react_native_core:
+    uses: ./.github/workflows/prebuild-ios-core.yml
+    with:
+      use-hermes-nightly: true
+    secrets: inherit
+    needs: [prebuild_apple_dependencies]
 
   build_android:
     runs-on: 8-core-ubuntu
+    if: github.repository == 'facebook/react-native'
     needs: [set_release_type]
     container:
       image: reactnativecommunity/react-native-android:latest
@@ -164,12 +60,9 @@ jobs:
     needs:
       [
         set_release_type,
-        prepare_hermes_workspace,
-        build_hermes_macos,
-        build_hermesc_linux,
-        build_hermesc_windows,
         build_android,
         prebuild_apple_dependencies,
+        prebuild_react_native_core,
       ]
     container:
       image: reactnativecommunity/react-native-android:latest
@@ -179,7 +72,6 @@ jobs:
         # By default we only build ARM64 to save time/resources. For release/nightlies, we override this value to build all archs.
         ORG_GRADLE_PROJECT_reactNativeArchitectures: "arm64-v8a"
     env:
-      HERMES_WS_DIR: /tmp/hermes
       GHA_NPM_TOKEN: ${{ secrets.GHA_NPM_TOKEN }}
       ORG_GRADLE_PROJECT_SIGNING_PWD: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_PWD }}
       ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_KEY }}
@@ -191,7 +83,6 @@ jobs:
       - name: Build and Publish NPM Package
         uses: ./.github/actions/build-npm-package
         with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
           release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
           gha-npm-token: ${{ env.GHA_NPM_TOKEN }}
           gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}

.github/workflows/prebuild-ios-core.yml

@@ -0,0 +1,198 @@
+name: Prebuild iOS Dependencies
+
+on:
+  workflow_call: # this directive allow us to call this workflow from other workflows
+    inputs:
+      use-hermes-nightly:
+        description: 'Whether to use the hermes nightly build or read the version from the versions.properties file'
+        type: boolean
+        required: false
+        default: false
+
+jobs:
+  build-rn-slice:
+    runs-on: macos-15
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor: ['Debug', 'Release']
+        slice: [
+          'ios',
+          'ios-simulator',
+          'mac-catalyst',
+        ]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Restore cache if present
+        id: restore-ios-slice
+        uses: actions/cache/restore@v4
+        with:
+          key: v3-ios-core-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashFiles('packages/react-native/Package.swift', 'packages/react-native/scripts/ios-prebuild/*.js', 'packages/react-native/scripts/ios-prebuild.js', 'packages/react-native/React/**/*', 'packages/react-native/ReactCommon/**/*', 'packages/react-native/Libraries/**/*') }}
+          path: packages/react-native/
+      - name: Setup node.js
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        uses: ./.github/actions/setup-node
+      - name: Setup xcode
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        uses: ./.github/actions/setup-xcode
+        with:
+          platform: ${{ matrix.slice }}
+      - name: Yarn Install
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        uses: ./.github/actions/yarn-install
+      - name: Set Hermes version
+        shell: bash
+        run: |
+          if [ "${{ inputs.use-hermes-nightly }}" == "true" ]; then
+            HERMES_VERSION="nightly"
+          else
+            HERMES_VERSION=$(sed -n 's/^HERMES_VERSION_NAME=//p' packages/react-native/sdks/hermes-engine/version.properties)
+          fi
+          echo "Using Hermes version: $HERMES_VERSION"
+          echo "HERMES_VERSION=$HERMES_VERSION" >> $GITHUB_ENV
+      - name: Download ReactNativeDependencies
+        uses: actions/download-artifact@v4
+        with:
+          name: ReactNativeDependencies${{ matrix.flavor }}.xcframework.tar.gz
+          path: /tmp/third-party/
+      - name: Extract ReactNativeDependencies
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Extract ReactNativeDependencies
+          tar -xzf /tmp/third-party/ReactNativeDependencies${{ matrix.flavor }}.xcframework.tar.gz -C /tmp/third-party/
+
+          # Create destination folder
+          mkdir -p packages/react-native/third-party/
+
+          # Move the XCFramework in the destination directory
+          mv /tmp/third-party/packages/react-native/third-party/ReactNativeDependencies.xcframework packages/react-native/third-party/ReactNativeDependencies.xcframework
+
+          VERSION=$(jq -r '.version' packages/react-native/package.json)
+          echo "$VERSION-${{matrix.flavor}}" > "packages/react-native/third-party/version.txt"
+          cat "packages/react-native/third-party/version.txt"
+          # Check destination directory
+          ls -lR packages/react-native/third-party/
+      - name: Setup the workspace
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          cd packages/react-native
+          node scripts/ios-prebuild.js -s -f "${{ matrix.flavor }}"
+      - name: Build React Native
+        if: steps.restore-ios-slice.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # This is going to be replaced by a CLI script
+          cd packages/react-native
+          node scripts/ios-prebuild -b -f "${{ matrix.flavor }}" -p "${{ matrix.slice }}"
+      - name: Upload headers
+        uses: actions/upload-artifact@v4
+        with:
+          name: prebuild-ios-core-headers-${{ matrix.flavor }}-${{ matrix.slice }}
+          path:
+            packages/react-native/.build/headers
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4.3.4
+        with:
+          name: prebuild-ios-core-slice-${{ matrix.flavor }}-${{ matrix.slice }}
+          path: |
+            packages/react-native/.build/output/spm/${{ matrix.flavor }}/Build/Products
+      - name: Save Cache
+        uses: actions/cache/save@v4
+        if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode
+        with:
+          key: v3-ios-core-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashFiles('packages/react-native/Package.swift', 'packages/react-native/scripts/ios-prebuild/*.js', 'packages/react-native/scripts/ios-prebuild.js', 'packages/react-native/React/**/*', 'packages/react-native/ReactCommon/**/*', 'packages/react-native/Libraries/**/*') }}
+          path: |
+            packages/react-native/.build/output/spm/${{ matrix.flavor }}/Build/Products
+            packages/react-native/.build/headers
+
+  compose-xcframework:
+    runs-on: macos-15
+    needs: [build-rn-slice]
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor: ['Debug', 'Release']
+    env:
+      REACT_ORG_CODE_SIGNING_P12_CERT: ${{ secrets.REACT_ORG_CODE_SIGNING_P12_CERT }}
+      REACT_ORG_CODE_SIGNING_P12_CERT_PWD: ${{ secrets.REACT_ORG_CODE_SIGNING_P12_CERT_PWD }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Restore cache if present
+        id: restore-ios-xcframework
+        uses: actions/cache/restore@v4
+        with:
+          path: packages/react-native/.build/output/xcframeworks
+          key: v2-ios-core-xcframework-${{ matrix.flavor }}-${{ hashFiles('packages/react-native/Package.swift', 'packages/react-native/scripts/ios-prebuild/*.js', 'packages/react-native/scripts/ios-prebuild.js', 'packages/react-native/React/**/*', 'packages/react-native/ReactCommon/**/*', 'packages/react-native/Libraries/**/*') }}
+      - name: Setup node.js
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        uses: ./.github/actions/setup-node
+      - name: Setup xcode
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        uses: ./.github/actions/setup-xcode
+        with:
+          xcode-version: '16.2.0'
+      - name: Yarn Install
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        uses: ./.github/actions/yarn-install
+      - name: Download slice artifacts
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        uses: actions/download-artifact@v4
+        with:
+          pattern: prebuild-ios-core-slice-${{ matrix.flavor }}-*
+          path: packages/react-native/.build/output/spm/${{ matrix.flavor }}/Build/Products
+          merge-multiple: true
+      - name: Download headers
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        uses: actions/download-artifact@v4
+        with:
+          pattern: prebuild-ios-core-headers-${{ matrix.flavor }}-*
+          path: packages/react-native/.build/headers
+          merge-multiple: true
+      - name: Setup Keychain
+        if: ${{ steps.restore-ios-xcframework.outputs.cache-hit != 'true' && env.REACT_ORG_CODE_SIGNING_P12_CERT != '' }}
+        uses: apple-actions/import-codesign-certs@v3 # https://github.com/marketplace/actions/import-code-signing-certificates
+        with:
+          p12-file-base64: ${{ secrets.REACT_ORG_CODE_SIGNING_P12_CERT }}
+          p12-password: ${{ secrets.REACT_ORG_CODE_SIGNING_P12_CERT_PWD }}
+      - name: Create XCFramework
+        if: ${{ steps.restore-ios-xcframework.outputs.cache-hit != 'true' && env.REACT_ORG_CODE_SIGNING_P12_CERT == '' }}
+        run: |
+          cd packages/react-native
+          node scripts/ios-prebuild -c -f "${{ matrix.flavor }}"
+      - name: Create and Sign XCFramework
+        if: ${{ steps.restore-ios-xcframework.outputs.cache-hit != 'true' && env.REACT_ORG_CODE_SIGNING_P12_CERT != '' }}
+        run: |
+          cd packages/react-native
+          node scripts/ios-prebuild -c -f "${{ matrix.flavor }}" -i "React Org"
+      - name: Compress and Rename XCFramework
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        run: |
+          cd packages/react-native/.build/output/xcframeworks/${{matrix.flavor}}
+          tar -cz -f ../ReactCore${{matrix.flavor}}.xcframework.tar.gz React.xcframework
+      - name: Compress and Rename dSYM
+        if: steps.restore-ios-xcframework.outputs.cache-hit != 'true'
+        run: |
+          cd packages/react-native/.build/output/xcframeworks/${{matrix.flavor}}/Symbols
+          tar -cz -f ../../ReactCore${{ matrix.flavor }}.framework.dSYM.tar.gz .
+      - name: Upload XCFramework Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ReactCore${{ matrix.flavor }}.xcframework.tar.gz
+          path: packages/react-native/.build/output/xcframeworks/ReactCore${{matrix.flavor}}.xcframework.tar.gz
+      - name: Upload dSYM Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ReactCore${{ matrix.flavor }}.framework.dSYM.tar.gz
+          path: packages/react-native/.build/output/xcframeworks/ReactCore${{matrix.flavor}}.framework.dSYM.tar.gz
+      - name: Save cache if present
+        if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode
+        uses: actions/cache/save@v4
+        with:
+          path: |
+            packages/react-native/.build/output/xcframeworks/ReactCore${{matrix.flavor}}.xcframework.tar.gz
+            packages/react-native/.build/output/xcframeworks/ReactCore${{matrix.flavor}}.framework.dSYM.tar.gz
+          key: v2-ios-core-xcframework-${{ matrix.flavor }}-${{ hashFiles('packages/react-native/Package.swift', 'packages/react-native/scripts/ios-prebuild/*.js', 'packages/react-native/scripts/ios-prebuild.js', 'packages/react-native/React/**/*', 'packages/react-native/ReactCommon/**/*', 'packages/react-native/Libraries/**/*') }}

.github/workflows/prebuild-ios-dependencies.yml

@@ -1,4 +1,4 @@
-name: Prebuild iOS
+name: Prebuild iOS Dependencies
 
 on:
   workflow_call: # this directive allow us to call this workflow from other workflows
@@ -7,7 +7,7 @@ on:
 jobs:
   prepare_workspace:
     name: Prepare workspace
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -18,7 +18,7 @@ jobs:
         uses: actions/cache/restore@v4
         with:
           path: packages/react-native/third-party/
-          key: v2-ios-dependencies-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
           enableCrossOsArchive: true
       - name: Yarn Install
         if: steps.restore-ios-prebuilds.outputs.cache-hit != 'true'
@@ -40,13 +40,13 @@ jobs:
         uses: actions/cache/save@v4
         if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode
         with:
-          key: v2-ios-dependencies-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
           enableCrossOsArchive: true
           path: packages/react-native/third-party/
 
   build-apple-slices:
     name: Build Apple Slice
-    runs-on: macos-14
+    runs-on: macos-15
     needs: [prepare_workspace]
     strategy:
       fail-fast: false
@@ -65,16 +65,17 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup node.js
         uses: ./.github/actions/setup-node
-      - name: Setup xcode
-        uses: ./.github/actions/setup-xcode
-        with:
-          xcode-version: '16.1'
       - name: Restore slice folder
         id: restore-slice-folder
         uses: actions/cache/restore@v4
         with:
           path: packages/react-native/third-party/.build/Build/Products
-          key: v2-ios-dependencies-slice-folder-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-slice-folder-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+      - name: Setup xcode
+        if: steps.restore-slice-folder.outputs.cache-hit != 'true'
+        uses: ./.github/actions/setup-xcode
+        with:
+          platform: ${{ matrix.slice }}
       - name: Yarn Install
         if: steps.restore-slice-folder.outputs.cache-hit != 'true'
         uses: ./.github/actions/yarn-install
@@ -85,15 +86,8 @@ jobs:
           name: ios-prebuilds-workspace
           path: packages/react-native/third-party/
       - name: Print third-party folder structure
+        if: steps.restore-slice-folder.outputs.cache-hit != 'true'
         run: ls -lR packages/react-native/third-party
-      - name: Install VisionOS
-        if: ${{ steps.restore-slice-folder.outputs.cache-hit != 'true' && (matrix.slice == 'xros' || matrix.slice == 'xros-simulator') }}
-        run: |
-          # https://github.com/actions/runner-images/issues/10559
-          sudo xcodebuild -runFirstLaunch
-          sudo xcrun simctl list
-          sudo xcodebuild -downloadPlatform visionOS
-          sudo xcodebuild -runFirstLaunch
       - name: Build slice ${{ matrix.slice }} for ${{ matrix.flavor }}
         if: steps.restore-slice-folder.outputs.cache-hit != 'true'
         run:  node scripts/releases/prepare-ios-prebuilds.js -b -p ${{ matrix.slice }} -r ${{ matrix.flavor }}
@@ -107,14 +101,14 @@ jobs:
         uses: actions/cache/save@v4
         if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode
         with:
-          key: v2-ios-dependencies-slice-folder-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-slice-folder-${{ matrix.slice }}-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
           enableCrossOsArchive: true
           path: |
             packages/react-native/third-party/.build/Build/Products
 
   create-xcframework:
     name: Prepare XCFramework
-    runs-on: macos-14
+    runs-on: macos-15
     needs: [build-apple-slices]
     strategy:
       fail-fast: false
@@ -138,7 +132,7 @@ jobs:
         with:
           path: |
             packages/react-native/third-party/
-          key: v2-ios-dependencies-xcframework-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-xcframework-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
       # If cache hit, we already have our binary. We don't need to do anything.
       - name: Yarn Install
         if: steps.restore-xcframework.outputs.cache-hit != 'true'
@@ -179,8 +173,9 @@ jobs:
       - name: Compress and Rename dSYM
         if: steps.restore-xcframework.outputs.cache-hit != 'true'
         run: |
-          tar -cz -f packages/react-native/third-party/Symbols/ReactNativeDependencies${{ matrix.flavor }}.framework.dSYM.tar.gz \
-            packages/react-native/third-party/Symbols/ReactNativeDependencies.framework.dSYM
+          cd packages/react-native/third-party/Symbols/
+          tar -cz -f ../ReactNativeDependencies${{ matrix.flavor }}.framework.dSYM.tar.gz .
+          mv ../ReactNativeDependencies${{ matrix.flavor }}.framework.dSYM.tar.gz ./ReactNativeDependencies${{ matrix.flavor }}.framework.dSYM.tar.gz
       - name: Upload XCFramework Artifact
         uses: actions/upload-artifact@v4
         with:
@@ -199,4 +194,4 @@ jobs:
           path: |
             packages/react-native/third-party/ReactNativeDependencies${{ matrix.flavor }}.xcframework.tar.gz
             packages/react-native/third-party/ReactNativeDependencies${{ matrix.flavor }}.framework.dSYM.tar.gz
-          key: v2-ios-dependencies-xcframework-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}
+          key: v3-ios-dependencies-xcframework-${{ matrix.flavor }}-${{ hashfiles('scripts/releases/ios-prebuild/configuration.js') }}

.github/workflows/publish-bumped-packages.yml

@@ -9,6 +9,7 @@ on:
 jobs:
   publish_bumped_packages:
     runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
     env:
       GHA_NPM_TOKEN: ${{ secrets.GHA_NPM_TOKEN }}
     steps:
@@ -21,7 +22,7 @@ jobs:
       - name: Build packages
         run: yarn build
       - name: Build types
-        run: yarn build-types
+        run: yarn build-types --skip-snapshot
       - name: Set NPM auth token
         run: echo "//registry.npmjs.org/:_authToken=$GHA_NPM_TOKEN" > ~/.npmrc
       - name: Find and publish all bumped packages

.github/workflows/publish-release.yml

@@ -19,153 +19,45 @@ jobs:
           echo "Setting release type to release"
           echo "RELEASE_TYPE=release" >> $GITHUB_OUTPUT
 
-  prepare_hermes_workspace:
+  set_hermes_versions:
     runs-on: ubuntu-latest
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
+    if: github.repository == 'facebook/react-native'
     outputs:
-      react-native-version: ${{ steps.prepare-hermes-workspace.outputs.react-native-version }}
-      hermes-version: ${{ steps.prepare-hermes-workspace.outputs.hermes-version }}
+      HERMES_VERSION: ${{ steps.set_hermes_versions.outputs.HERMES_VERSION }}
+      HERMES_V1_VERSION: ${{ steps.set_hermes_versions.outputs.HERMES_V1_VERSION }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Prepare Hermes Workspace
-        id: prepare-hermes-workspace
-        uses: ./.github/actions/prepare-hermes-workspace
-        with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
-          hermes-version-file: ${{ env.HERMES_VERSION_FILE }}
+      - id: set_hermes_versions
+        run: |
+          echo "Setting hermes versions to latest"
+          hermes_version=$(grep -oE 'HERMES_VERSION_NAME=([0-9]+\.[0-9]+\.[0-9]+)' packages/react-native/sdks/hermes-engine/version.properties | cut -d'=' -f2)
+          hermes_v1_version=$(grep -oE 'HERMES_V1_VERSION_NAME=([0-9]+\.[0-9]+\.[0-9]+)' packages/react-native/sdks/hermes-engine/version.properties | cut -d'=' -f2)
 
-  build_hermesc_apple:
-    runs-on: macos-13
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - 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 }}
-  build_apple_slices_hermes:
-    runs-on: macos-14
-    needs: [build_hermesc_apple, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-      HERMES_OSXBIN_ARTIFACTS_DIR: /tmp/hermes/osx-bin
-      IOS_DEPLOYMENT_TARGET: "15.1"
-      XROS_DEPLOYMENT_TARGET: "1.0"
-      MAC_DEPLOYMENT_TARGET: "10.15"
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-        slice: [macosx, iphoneos, iphonesimulator, appletvos, appletvsimulator, catalyst, xros, xrsimulator]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Slice
-        uses: ./.github/actions/build-apple-slices-hermes
-        with:
-          flavor: ${{ matrix.flavor }}
-          slice: ${{ matrix.slice}}
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+          echo "HERMES_VERSION=$hermes_version" >> $GITHUB_OUTPUT
+          echo "HERMES_V1_VERSION=$hermes_v1_version" >> $GITHUB_OUTPUT
+      - name: Print hermes versions
+        run: |
+          echo "HERMES_VERSION=${{ steps.set_hermes_versions.outputs.HERMES_VERSION }}"
+          echo "HERMES_V1_VERSION=${{ steps.set_hermes_versions.outputs.HERMES_V1_VERSION }}"
 
-  build_hermes_macos:
-    runs-on: macos-13
-    needs: [build_apple_slices_hermes, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Hermes MacOS
-        uses: ./.github/actions/build-hermes-macos
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-          flavor: ${{ matrix.flavor }}
   prebuild_apple_dependencies:
-    uses: ./.github/workflows/prebuild-ios.yml
+    if: github.repository == 'facebook/react-native'
+    uses: ./.github/workflows/prebuild-ios-dependencies.yml
     secrets: inherit
 
-  build_hermesc_linux:
-    runs-on: ubuntu-latest
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Linux
-        uses: ./.github/actions/build-hermesc-linux
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_hermesc_windows:
-    runs-on: windows-2019
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
-      ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
-      MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
-      CMAKE_DIR: 'C:\Program Files\CMake\bin'
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Windows
-        uses: ./.github/actions/build-hermesc-windows
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_android:
-    runs-on: 8-core-ubuntu
-    needs: [set_release_type]
-    container:
-      image: reactnativecommunity/react-native-android:latest
-      env:
-        TERM: "dumb"
-        GRADLE_OPTS: "-Dorg.gradle.daemon=false"
-        ORG_GRADLE_PROJECT_SIGNING_PWD: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_PWD }}
-        ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_KEY }}
-        ORG_GRADLE_PROJECT_SONATYPE_USERNAME: ${{ secrets.ORG_GRADLE_PROJECT_SONATYPE_USERNAME }}
-        ORG_GRADLE_PROJECT_SONATYPE_PASSWORD: ${{ secrets.ORG_GRADLE_PROJECT_SONATYPE_PASSWORD }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Android
-        uses: ./.github/actions/build-android
-        with:
-          release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
-          gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
+  prebuild_react_native_core:
+    uses: ./.github/workflows/prebuild-ios-core.yml
+    secrets: inherit
+    needs: [prebuild_apple_dependencies]
 
   build_npm_package:
     runs-on: 8-core-ubuntu
     needs:
       [
         set_release_type,
-        prepare_hermes_workspace,
-        build_hermes_macos,
-        build_hermesc_linux,
-        build_hermesc_windows,
-        build_android,
         prebuild_apple_dependencies,
+        prebuild_react_native_core,
       ]
     container:
       image: reactnativecommunity/react-native-android:latest
@@ -175,7 +67,6 @@ jobs:
         # By default we only build ARM64 to save time/resources. For release/nightlies, we override this value to build all archs.
         ORG_GRADLE_PROJECT_reactNativeArchitectures: "arm64-v8a"
     env:
-      HERMES_WS_DIR: /tmp/hermes
       GHA_NPM_TOKEN: ${{ secrets.GHA_NPM_TOKEN }}
       ORG_GRADLE_PROJECT_SIGNING_PWD: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_PWD }}
       ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_KEY }}
@@ -191,7 +82,6 @@ jobs:
       - name: Build and Publish NPM Package
         uses: ./.github/actions/build-npm-package
         with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
           release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
           gha-npm-token: ${{ env.GHA_NPM_TOKEN }}
           gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
@@ -249,6 +139,9 @@ jobs:
     secrets: inherit
 
   create_draft_release:
-    needs: generate_changelog
+    needs: [generate_changelog, set_hermes_versions]
     uses: ./.github/workflows/create-draft-release.yml
     secrets: inherit
+    with:
+      hermesVersion: ${{ needs.set_hermes_versions.outputs.HERMES_VERSION }}
+      hermesV1Version: ${{ needs.set_hermes_versions.outputs.HERMES_V1_VERSION }}

.github/workflows/retry-workflow.yml

@@ -0,0 +1,20 @@
+name: Retry workflow
+# Based on https://stackoverflow.com/a/78314483
+
+on:
+    workflow_dispatch:
+        inputs:
+            run_id:
+                required: true
+jobs:
+    rerun:
+        runs-on: ubuntu-latest
+        if: github.repository == 'facebook/react-native'
+        steps:
+            - name: rerun ${{ inputs.run_id }}
+              env:
+                  GH_REPO: ${{ github.repository }}
+                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+              run: |
+                  gh run watch ${{ inputs.run_id }} > /dev/null 2>&1
+                  gh run rerun ${{ inputs.run_id }} --failed

.github/workflows/stale-bot.yml

@@ -14,8 +14,8 @@ jobs:
         with:
           repo-token: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
           days-before-stale: 180
-          stale-issue-message: 'This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 7 days.'
-          stale-pr-message: 'This PR is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 7 days.'
+          stale-issue-message: 'This issue is stale because it has been open for 180 days with no activity. It will be closed in 7 days unless you comment on it or remove the "Stale" label.'
+          stale-pr-message: 'This PR is stale because it has been open for 180 days with no activity. It will be closed in 7 days unless you comment on it or remove the "Stale" label.'
           close-issue-message: 'This issue was closed because it has been stalled for 7 days with no activity.'
           close-pr-message: 'This PR was closed because it has been stalled for 7 days with no activity.'
           exempt-issue-labels: 'Help Wanted :octocat:, Good first issue, Never gets stale, Issue: Author Provided Repro'

.github/workflows/test-all.yml

@@ -2,11 +2,6 @@ name: Test All
 
 on:
   workflow_dispatch:
-    inputs:
-      run-e2e-tests:
-        description: Whether to run E2E tests or not
-        type: boolean
-        default: false
   pull_request:
   push:
     branches:
@@ -16,6 +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:
@@ -37,96 +33,22 @@ jobs:
 
           echo "Should I run E2E tests? ${{ inputs.run-e2e-tests }}"
 
-  prepare_hermes_workspace:
-    runs-on: ubuntu-latest
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_VERSION_FILE: packages/react-native/sdks/.hermesversion
-    outputs:
-      react-native-version: ${{ steps.prepare-hermes-workspace.outputs.react-native-version }}
-      hermes-version: ${{ steps.prepare-hermes-workspace.outputs.hermes-version }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Prepare Hermes Workspace
-        id: prepare-hermes-workspace
-        uses: ./.github/actions/prepare-hermes-workspace
-        with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
-          hermes-version-file: ${{ env.HERMES_VERSION_FILE }}
-
-  build_hermesc_apple:
-    runs-on: macos-13
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Apple
-        uses: ./.github/actions/build-hermesc-apple
-        with:
-          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
-    needs: [build_hermesc_apple, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-      HERMES_OSXBIN_ARTIFACTS_DIR: /tmp/hermes/osx-bin
-      IOS_DEPLOYMENT_TARGET: "15.1"
-      XROS_DEPLOYMENT_TARGET: "1.0"
-      MAC_DEPLOYMENT_TARGET: "10.15"
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-        slice: [macosx, iphoneos, iphonesimulator, appletvos, appletvsimulator, catalyst, xros, xrsimulator]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Slice
-        uses: ./.github/actions/build-apple-slices-hermes
-        with:
-          flavor: ${{ matrix.flavor }}
-          slice: ${{ matrix.slice}}
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_hermes_macos:
-    runs-on: macos-13
-    needs: [build_apple_slices_hermes, prepare_hermes_workspace]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
-    strategy:
-      fail-fast: false
-      matrix:
-        flavor: [Debug, Release]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build Hermes MacOS
-        uses: ./.github/actions/build-hermes-macos
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-          flavor: ${{ matrix.flavor }}
-
   prebuild_apple_dependencies:
-    uses: ./.github/workflows/prebuild-ios.yml
+    if: github.repository == 'facebook/react-native'
+    uses: ./.github/workflows/prebuild-ios-dependencies.yml
     secrets: inherit
 
+  prebuild_react_native_core:
+    uses: ./.github/workflows/prebuild-ios-core.yml
+    with:
+      use-hermes-nightly: ${{ !endsWith(github.ref_name, '-stable') }}
+    secrets: inherit
+    needs: [prebuild_apple_dependencies]
+
   test_ios_rntester_ruby_3_2_0:
-    runs-on: macos-13
+    runs-on: macos-15
     needs:
-      [build_apple_slices_hermes, prepare_hermes_workspace, build_hermes_macos, prebuild_apple_dependencies]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
+      [prebuild_apple_dependencies, prebuild_react_native_core]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -134,133 +56,81 @@ jobs:
         uses: ./.github/actions/test-ios-rntester
         with:
           ruby-version: "3.2.0"
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  test_ios_rntester_dynamic_frameworks:
-    runs-on: macos-13
-    needs:
-      [build_apple_slices_hermes, prepare_hermes_workspace, build_hermes_macos, prebuild_apple_dependencies]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
-    strategy:
-      fail-fast: false
-      matrix:
-        jsengine: [Hermes, JSC]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Run it
-        uses: ./.github/actions/test-ios-rntester
-        with:
-          jsengine: ${{ matrix.jsengine }}
-          use-frameworks: DynamicFrameworks
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+          flavor: Debug
 
   test_ios_rntester:
-    runs-on: macos-13-large
+    runs-on: macos-15-large
     needs:
-      [build_apple_slices_hermes, prepare_hermes_workspace, build_hermes_macos, prebuild_apple_dependencies]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
+      [prebuild_apple_dependencies, prebuild_react_native_core]
     continue-on-error: true
     strategy:
       fail-fast: false
       matrix:
-        jsengine: [Hermes, JSC]
-        architecture: [NewArch, OldArch]
         flavor: [Debug, Release]
-        exclude: # We don't want to test the Old Arch in Release for E2E
-          - jsengine: Hermes
-            architecture: OldArch
-            flavor: Release
-          - jsengine: JSC
-            architecture: OldArch
-            flavor: Release
+        frameworks: [StaticLibraries, DynamicFrameworks]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Run it
         uses: ./.github/actions/test-ios-rntester
         with:
-          jsengine: ${{ matrix.jsengine }}
-          architecture: ${{ matrix.architecture }}
-          run-unit-tests: "false"
-          use-frameworks: StaticLibraries
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+          use-frameworks: ${{ matrix.frameworks }}
           flavor: ${{ matrix.flavor }}
 
   test_e2e_ios_rntester:
-    if: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
-    runs-on: macos-13-large
+    runs-on: macos-15-large
     needs:
       [test_ios_rntester]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
     strategy:
       fail-fast: false
       matrix:
-        jsengine: [Hermes, JSC]
-        architecture: [NewArch]
         flavor: [Debug, Release]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Setup Node.js
+        uses: ./.github/actions/setup-node
       - name: Download App
         uses: actions/download-artifact@v4
         with:
-          name: RNTesterApp-${{ matrix.architecture }}-${{ matrix.jsengine }}-${{ matrix.flavor }}
+          name: RNTesterApp-NewArch-${{ matrix.flavor }}
           path: /tmp/RNTesterBuild/RNTester.app
       - name: Check downloaded folder content
         run: ls -lR /tmp/RNTesterBuild
+      - name: Setup xcode
+        uses: ./.github/actions/setup-xcode
+        with:
+          platform: ios
       - name: Run E2E Tests
         uses: ./.github/actions/maestro-ios
         with:
           app-path: "/tmp/RNTesterBuild/RNTester.app"
           app-id: com.meta.RNTester.localDevelopment
-          jsengine: ${{ matrix.jsengine }}
           maestro-flow: ./packages/rn-tester/.maestro/
           flavor: ${{ matrix.flavor }}
 
   test_e2e_ios_templateapp:
-    if: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
-    runs-on: macos-13-large
+    runs-on: macos-15-large
     needs: [build_npm_package, prebuild_apple_dependencies]
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
-    continue-on-error: true
     strategy:
       fail-fast: false
       matrix:
-        jsengine: [Hermes, JSC]
         flavor: [Debug, Release]
-        architecture: [OldArch, NewArch]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup xcode
         uses: ./.github/actions/setup-xcode
+        with:
+          platform: ios
       - name: Setup node.js
         uses: ./.github/actions/setup-node
       - name: Run yarn
         uses: ./.github/actions/yarn-install
       - name: Setup ruby
-        uses: ruby/setup-ruby@v1.170.0
+        uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.6.10
-      - name: Download Hermes
-        uses: actions/download-artifact@v4
-        with:
-          name: hermes-darwin-bin-${{matrix.flavor}}
-          path: /tmp/react-native-tmp
       - name: Download React Native Package
         uses: actions/download-artifact@v4
         with:
@@ -276,14 +146,24 @@ jobs:
       - name: Print third-party folder
         shell: bash
         run: ls -lR /tmp/third-party
+      - name: Download React Native Prebuilds
+        uses: actions/download-artifact@v4
+        with:
+          name: ReactCore${{ matrix.flavor }}.xcframework.tar.gz
+          path: /tmp/ReactCore
+      - name: Print ReactCore folder
+        shell: bash
+        run: ls -lR /tmp/ReactCore
+      - name: Configure git
+        shell: bash
+        run: |
+            git config --global user.email "react-native-bot@meta.com"
+            git config --global user.name "React Native Bot"
       - name: Prepare artifacts
         run: |
           REACT_NATIVE_PKG=$(find /tmp/react-native-tmp -type f -name "*.tgz")
           echo "React Native tgs is $REACT_NATIVE_PKG"
 
-          HERMES_PATH=$(find /tmp/react-native-tmp -type f -name "*.tar.gz")
-          echo "Hermes path is $HERMES_PATH"
-
           # For stable branches, we want to use the stable branch of the template
           # In all the other cases, we want to use "main"
           BRANCH=${{ github.ref_name }}
@@ -296,13 +176,11 @@ jobs:
           cd /tmp/RNTestProject/ios
           bundle install
           NEW_ARCH_ENABLED=1
-          if [[ ${{ matrix.architecture }} == "OldArch" ]]; then
-            echo "Disable the New Architecture"
-            NEW_ARCH_ENABLED=0
-          fi
 
           export RCT_USE_LOCAL_RN_DEP=/tmp/third-party/ReactNativeDependencies${{ matrix.flavor }}.xcframework.tar.gz
-          HERMES_ENGINE_TARBALL_PATH=$HERMES_PATH RCT_NEW_ARCH_ENABLED=$NEW_ARCH_ENABLED bundle exec pod install
+          # Disable prebuilds for now, as they are causing issues with E2E tests for 0.82-stable branch
+          # export RCT_TESTONLY_RNCORE_TARBALL_PATH="/tmp/ReactCore/ReactCore${{ matrix.flavor }}.xcframework.tar.gz"
+          RCT_NEW_ARCH_ENABLED=$NEW_ARCH_ENABLED bundle exec pod install
 
           xcodebuild \
             -scheme "RNTestProject" \
@@ -316,23 +194,17 @@ jobs:
         with:
           app-path: "/tmp/RNTestProject/Build/Products/${{ matrix.flavor }}-iphonesimulator/RNTestProject.app"
           app-id: org.reactjs.native.example.RNTestProject
-          jsengine: ${{ matrix.jsengine }}
           maestro-flow: ./scripts/e2e/.maestro/
           flavor: ${{ matrix.flavor }}
           working-directory: /tmp/RNTestProject
-          architecture: ${{ matrix.architecture }}
 
   test_e2e_android_templateapp:
-    if: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
     runs-on: 4-core-ubuntu
     needs: build_npm_package
-    continue-on-error: true
     strategy:
       fail-fast: false
       matrix:
-        jsengine: [Hermes, JSC]
         flavor: [debug, release]
-        architecture: [OldArch, NewArch]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -378,16 +250,6 @@ jobs:
           cd /tmp/RNTestProject
           echo "react.internal.mavenLocalRepo=$MAVEN_LOCAL" >> android/gradle.properties
 
-          if [[ ${{matrix.architecture}} == "OldArch" ]]; then
-            echo "Disabling the New Architecture"
-            sed -i 's/newArchEnabled=true/newArchEnabled=false/' android/gradle.properties
-          fi
-
-          if [[ ${{matrix.jsengine}} == "JSC" ]]; then
-            echo "Using JSC instead of Hermes"
-            sed -i 's/hermesEnabled=true/hermesEnabled=false/' android/gradle.properties
-          fi
-
           # Build
           cd android
           CAPITALIZED_FLAVOR=$(echo "${{ matrix.flavor }}" | awk '{print toupper(substr($0, 1, 1)) substr($0, 2)}')
@@ -399,46 +261,29 @@ jobs:
         with:
           app-path: /tmp/RNTestProject/android/app/build/outputs/apk/${{ matrix.flavor }}/app-${{ matrix.flavor }}.apk
           app-id: com.rntestproject
-          jsengine: ${{ matrix.jsengine }}
           maestro-flow: ./scripts/e2e/.maestro/
           install-java: 'false'
           flavor: ${{ matrix.flavor }}
           working-directory: /tmp/RNTestProject
-          architecture: ${{ matrix.architecture }}
 
-  build_hermesc_linux:
-    runs-on: ubuntu-latest
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: /tmp/hermes
-      HERMES_TARBALL_ARTIFACTS_DIR: /tmp/hermes/hermes-runtime-darwin
+  run_fantom_tests:
+    runs-on: 8-core-ubuntu
+    needs: [set_release_type]
+    container:
+      image: reactnativecommunity/react-native-android:latest
+      env:
+        TERM: "dumb"
+        GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+        ORG_GRADLE_PROJECT_SIGNING_PWD: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_PWD }}
+        ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.ORG_GRADLE_PROJECT_SIGNING_KEY }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Build HermesC Linux
-        uses: ./.github/actions/build-hermesc-linux
+      - name: Build and Test Fantom
+        uses: ./.github/actions/run-fantom-tests
         with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
-
-  build_hermesc_windows:
-    runs-on: windows-2019
-    needs: prepare_hermes_workspace
-    env:
-      HERMES_WS_DIR: 'D:\tmp\hermes'
-      HERMES_TARBALL_ARTIFACTS_DIR: 'D:\tmp\hermes\hermes-runtime-darwin'
-      HERMES_OSXBIN_ARTIFACTS_DIR: 'D:\tmp\hermes\osx-bin'
-      ICU_URL: "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-Win64-MSVC2017.zip"
-      MSBUILD_DIR: 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin'
-      CMAKE_DIR: 'C:\Program Files\CMake\bin'
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Build HermesC Windows
-        uses: ./.github/actions/build-hermesc-windows
-        with:
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
+          release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
+          gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
 
   build_android:
     runs-on: 8-core-ubuntu
@@ -457,17 +302,14 @@ jobs:
         uses: ./.github/actions/build-android
         with:
           release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
-          run-e2e-tests: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
           gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
 
   test_e2e_android_rntester:
-    if: ${{ github.ref == 'refs/heads/main' || contains(github.ref,  'stable') || inputs.run-e2e-tests }}
     runs-on: 4-core-ubuntu
     needs: [build_android]
     strategy:
       fail-fast: false
       matrix:
-        jsengine: [hermes, jsc]
         flavor: [debug, release]
     steps:
       - name: Checkout
@@ -479,17 +321,16 @@ jobs:
       - name: Download APK
         uses: actions/download-artifact@v4
         with:
-          name: rntester-${{ matrix.jsengine }}-${{ matrix.flavor }}
-          path: ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.jsengine }}/${{ matrix.flavor }}/
+          name: rntester-${{ matrix.flavor }}
+          path: ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.flavor }}/
       - name: Print folder structure
-        run: ls -lR ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.jsengine }}/${{ matrix.flavor }}/
+        run: ls -lR ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.flavor }}/
       - name: Run E2E Tests
         uses: ./.github/actions/maestro-android
         timeout-minutes: 60
         with:
-          app-path: ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.jsengine }}/${{ matrix.flavor }}/app-${{ matrix.jsengine }}-x86-${{ matrix.flavor }}.apk
+          app-path: ./packages/rn-tester/android/app/build/outputs/apk/${{ matrix.flavor }}/app-x86-${{ matrix.flavor }}.apk
           app-id: com.facebook.react.uiapp
-          jsengine: ${{ matrix.jsengine }}
           maestro-flow: ./packages/rn-tester/.maestro
           flavor: ${{ matrix.flavor }}
 
@@ -498,27 +339,21 @@ jobs:
     needs:
       [
         set_release_type,
-        prepare_hermes_workspace,
-        build_hermes_macos,
-        build_hermesc_linux,
-        build_hermesc_windows,
         build_android,
         prebuild_apple_dependencies,
+        prebuild_react_native_core,
       ]
     container:
       image: reactnativecommunity/react-native-android:latest
       env:
         TERM: "dumb"
         GRADLE_OPTS: "-Dorg.gradle.daemon=false"
-    env:
-      HERMES_WS_DIR: /tmp/hermes
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Build NPM Package
         uses: ./.github/actions/build-npm-package
         with:
-          hermes-ws-dir: ${{ env.HERMES_WS_DIR }}
           release-type: ${{ needs.set_release_type.outputs.RELEASE_TYPE }}
           gradle-cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
 
@@ -540,8 +375,6 @@ jobs:
       fail-fast: false
       matrix:
         flavor: [Debug, Release]
-        architecture: [NewArch, OldArch]
-        jsengine: [Hermes, JSC]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -563,20 +396,20 @@ jobs:
           cache-encryption-key: ${{ secrets.GRADLE_CACHE_ENCRYPTION_KEY }}
       - name: Run yarn install
         uses: ./.github/actions/yarn-install
+      - name: Set nightly Hermes versions
+        shell: bash
+        run: |
+          node ./scripts/releases/use-hermes-nightly.js
+      - name: Run yarn install again, with the correct hermes version
+        uses: ./.github/actions/yarn-install
       - name: Prepare the Helloworld application
         shell: bash
         run: node ./scripts/e2e/init-project-e2e.js --useHelloWorld --pathToLocalReactNative "$GITHUB_WORKSPACE/build/$(cat build/react-native-package-version)"
-      - name: Build the Helloworld application for ${{ matrix.flavor }} with Architecture set to ${{ matrix.architecture }}, and using the ${{ matrix.jsengine }} JS engine.
+      - name: Build the Helloworld application for ${{ matrix.flavor }} with Architecture set to New Architecture.
         shell: bash
         run: |
-          cd packages/helloworld/android
+          cd private/helloworld/android
           args=()
-          if [[ ${{ matrix.architecture }} == "OldArch" ]]; then
-            args+=(--arch old)
-          fi
-          if [[ ${{ matrix.jsengine }} == "JSC" ]]; then
-            args+=(--jsvm jsc)
-          fi
           if [[ ${{ matrix.flavor }} == "Release" ]]; then
             args+=(--prod)
           fi
@@ -584,16 +417,15 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-artifact@v4.3.4
         with:
-          name: helloworld-apk-${{ matrix.flavor }}-${{ matrix.architecture }}-${{ matrix.jsengine }}
-          path: ./packages/helloworld/android/app/build/outputs/apk/
+          name: helloworld-apk-${{ matrix.flavor }}-NewArch-hermes
+          path: ./private/helloworld/android/app/build/outputs/apk/
           compression-level: 0
 
   test_ios_helloworld_with_ruby_3_2_0:
-    runs-on: macos-13
-    needs: [prepare_hermes_workspace, build_hermes_macos, prebuild_apple_dependencies] # prepare_hermes_workspace must be there because we need its reference to retrieve a couple of outputs
+    runs-on: macos-15
+    needs: [prebuild_apple_dependencies, prebuild_react_native_core]
     env:
       PROJECT_NAME: iOSTemplateProject
-      HERMES_WS_DIR: /tmp/hermes
       YARN_ENABLE_IMMUTABLE_INSTALLS: false
     steps:
       - name: Checkout
@@ -601,27 +433,21 @@ jobs:
       - uses: ./.github/actions/test-ios-helloworld
         with:
           ruby-version: 3.2.0
-          architecture: NewArch
           flavor: Debug
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
 
   test_ios_helloworld:
-    runs-on: macos-13
-    needs: [prepare_hermes_workspace, build_hermes_macos, prebuild_apple_dependencies] # prepare_hermes_workspace must be there because we need its reference to retrieve a couple of outputs
+    runs-on: macos-15
+    needs: [prebuild_apple_dependencies, prebuild_react_native_core]
     strategy:
       matrix:
         flavor: [Debug, Release]
-        jsengine: [Hermes, JSC]
         use_frameworks: [StaticLibraries, DynamicFrameworks]
         exclude:
           # This config is tested with Ruby 3.2.0. Let's not double test it.
           - flavor: Debug
-            jsengine: Hermes
             use_frameworks: StaticLibraries
     env:
       PROJECT_NAME: iOSTemplateProject
-      HERMES_WS_DIR: /tmp/hermes
       YARN_ENABLE_IMMUTABLE_INSTALLS: false
     steps:
       - name: Checkout
@@ -629,17 +455,15 @@ jobs:
       - uses: ./.github/actions/test-ios-helloworld
         with:
           flavor: ${{ matrix.flavor }}
-          jsengine: ${{ matrix.jsengine }}
           use-frameworks: ${{ matrix.use_frameworks }}
-          hermes-version: ${{ needs.prepare_hermes_workspace.outputs.hermes-version }}
-          react-native-version: ${{ needs.prepare_hermes_workspace.outputs.react-native-version }}
 
   test_js:
     runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
     strategy:
       fail-fast: false
       matrix:
-        node-version: ["22", "20", "18"]
+        node-version: ["24.4.1", "22", "20.19.4"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -650,12 +474,53 @@ jobs:
 
   lint:
     runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Run all the Linters
+      - name: Run all the linters
         uses: ./.github/actions/lint
         with:
           github-token: ${{ env.GH_TOKEN }}
+
+  # This job should help with the E2E flakyness.
+  # In case E2E tests fails, it launches a new retry-workflow workflow, passing the current run_id as input.
+  # The retry-workflow reruns only the failed jobs of the current test-all workflow using
+  # ```
+  # gh run rerun ${{ inputs.run_id }} --failed
+  # ```
+  # From https://stackoverflow.com/a/78314483 it seems like that adding the extra workflow
+  # rather then calling directly this command should improve stability of this solution.
+  # This is exactly the same as rerunning failed tests from the GH UI, but automated.
+  rerun-failed-jobs:
+    runs-on: ubuntu-latest
+    needs: [test_e2e_ios_rntester, test_e2e_android_rntester, test_e2e_ios_templateapp, test_e2e_android_templateapp]
+    if: ${{ github.ref == 'refs/heads/main' && always() }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Rerun failed jobs in the current workflow
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          SHOULD_RETRY=${{fromJSON(github.run_attempt) < 3}}
+          if [[ $SHOULD_RETRY == "false" ]]; then
+            exit 0
+          fi
+
+          RNTESTER_ANDROID_FAILED=${{ needs.test_e2e_android_rntester.result == 'failure' }}
+          TEMPLATE_ANDROID_FAILED=${{ needs.test_e2e_android_templateapp.result == 'failure' }}
+          RNTESTER_IOS_FAILED=${{ needs.test_e2e_ios_rntester.result == 'failure' }}
+          TEMPLATE_IOS_FAILED=${{ needs.test_e2e_ios_templateapp.result == 'failure' }}
+
+          echo "RNTESTER_ANDROID_FAILED: $RNTESTER_ANDROID_FAILED"
+          echo "TEMPLATE_ANDROID_FAILED: $TEMPLATE_ANDROID_FAILED"
+          echo "RNTESTER_IOS_FAILED: $RNTESTER_IOS_FAILED"
+          echo "TEMPLATE_IOS_FAILED: $TEMPLATE_IOS_FAILED"
+
+          if [[ $RNTESTER_ANDROID_FAILED == "true" || $TEMPLATE_ANDROID_FAILED == "true" || $RNTESTER_IOS_FAILED == "true" || $TEMPLATE_IOS_FAILED == "true" ]]; then
+            echo "Rerunning failed jobs in the current workflow"
+            gh workflow run retry-workflow.yml -F run_id=${{ github.run_id }}
+          fi

.github/workflows/test-libraries-on-nightlies.yml

@@ -1,96 +0,0 @@
-name: Test Libraries on Nightlies
-
-on:
-  workflow_call:
-
-
-# We use the matrix.library entry to specify the dependency we want to use
-# The key is used directly as the <pkg> in the `yarn add <pkg>` command.
-jobs:
-  runner-setup:
-    runs-on: ubuntu-latest
-    outputs:
-      runners: '{"ios":"macos-13-large", "android": "ubuntu-latest"}'
-    steps:
-      - run: echo no-op
-
-  test-library-on-nightly:
-    name: "[${{ matrix.platform }}] ${{ matrix.library }}"
-    needs: runner-setup
-    runs-on: ${{ fromJSON(needs.runner-setup.outputs.runners)[matrix.platform] }}
-    continue-on-error: true
-    strategy:
-      matrix:
-        library: [
-          "react-native-async-storage",
-          "react-native-blob-util",
-          "@react-native-clipboard/clipboard",
-          "@react-native-community/datetimepicker",
-          "react-native-gesture-handler",
-          "react-native-image-picker",
-          "react-native-linear-gradient",
-          "@react-native-masked-view/masked-view",
-          "react-native-maps",
-          "@react-native-community/netinfo",
-          "react-native-reanimated@nightly react-native-worklets@nightly", #reanimated requires worklet to be explicitly installed as a separate package
-          "react-native-svg",
-          "react-native-video",
-          "react-native-webview",
-          "react-native-mmkv",
-          "react-native-screens",
-          "react-native-pager-view",
-          "@react-native-community/slider",
-          #additional OSS libs used internally
-          "scandit-react-native-datacapture-barcode scandit-react-native-datacapture-core",
-          "react-native-contacts",
-          "react-native-device-info",
-          "react-native-email-link",
-          "react-native-exit-app",
-          "@dr.pogodin/react-native-fs",
-          "react-native-permissions",
-          "react-native-vector-icons",
-          "react-native-masked-view",
-          "@react-native-community/image-editor",
-        ]
-        platform: [ios, android]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Test ${{ matrix.library }}
-        id: run-test
-        uses: ./.github/actions/test-library-on-nightly
-        with:
-          library-npm-package: ${{ matrix.library }}
-          platform: ${{ matrix.platform}}
-      - name: Save outcome
-        id: save-outcome
-        if: always()
-        run: |
-          LIB_FOLDER=$(echo "${{matrix.library}}"  | tr ' ' '_' | tr '/' '_')
-          echo "${{matrix.library}}: ${{steps.run-test.outcome}}" > "/tmp/$LIB_FOLDER-${{ matrix.platform }}-outcome"
-          echo "lib_folder=$LIB_FOLDER" >> $GITHUB_OUTPUT
-      - name: Upload Artifact
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: ${{ steps.save-outcome.outputs.lib_folder }}-${{ matrix.platform }}-outcome
-          path: /tmp/${{ steps.save-outcome.outputs.lib_folder }}-${{ matrix.platform }}-outcome
-
-
-  collect-results:
-    runs-on: ubuntu-latest
-    needs: [test-library-on-nightly]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Restore outcomes
-        uses: actions/download-artifact@v4
-        with:
-          pattern: '*-outcome'
-          path: /tmp
-      - name: Collect failures
-        uses: actions/github-script@v6
-        with:
-          script: |
-            const {collectResults} = require('./.github/workflow-scripts/collectNightlyOutcomes.js');
-            collectResults();

.github/workflows/validate-dotslash-artifacts.yml

@@ -0,0 +1,49 @@
+name: Validate DotSlash Artifacts
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+  push:
+    branches:
+      - main
+    paths:
+      - packages/debugger-shell/bin/react-native-devtools
+      - "scripts/releases/**"
+      - package.json
+      - yarn.lock
+  pull_request:
+    branches:
+      - main
+    paths:
+      - packages/debugger-shell/bin/react-native-devtools
+      - "scripts/releases/**"
+      - package.json
+      - yarn.lock
+  # Same time as the nightly build: 2:15 AM UTC
+  schedule:
+    - cron: "15 2 * * *"
+
+jobs:
+  validate-dotslash-artifacts:
+    runs-on: ubuntu-latest
+    if: github.repository == 'facebook/react-native'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+      - name: Install dependencies
+        uses: ./.github/actions/yarn-install
+      - name: Configure Git
+        shell: bash
+        run: |
+          git config --local user.email "bot@reactnative.dev"
+          git config --local user.name "React Native Bot"
+      - name: Validate DotSlash artifacts
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const {validateDotSlashArtifacts} = require('./scripts/releases/validate-dotslash-artifacts.js');
+            await validateDotSlashArtifacts();

.gitignore

@@ -30,6 +30,7 @@ project.xcworkspace
 /packages/rn-tester/android/app/gradle/
 /packages/rn-tester/android/app/gradlew
 /packages/rn-tester/android/app/gradlew.bat
+/packages/react-native/build/
 /packages/react-native/ReactAndroid/build/
 /packages/react-native/ReactAndroid/.cxx/
 /packages/react-native/ReactAndroid/gradle/
@@ -39,10 +40,9 @@ project.xcworkspace
 /packages/react-native/ReactAndroid/external-artifacts/artifacts/
 /packages/react-native/ReactAndroid/hermes-engine/build/
 /packages/react-native/ReactAndroid/hermes-engine/.cxx/
-/packages/helloworld/android/app/build/
-/packages/helloworld/android/build/
+/private/helloworld/android/app/build/
+/private/helloworld/android/build/
 /packages/react-native-popup-menu-android/android/build/
-/packages/react-native-test-library/android/build/
 
 # Buck
 .buckd
@@ -107,33 +107,43 @@ package-lock.json
 
 # Ruby Gems (Bundler)
 /packages/react-native/vendor
-/packages/helloworld/vendor
+/private/helloworld/vendor
 .ruby-version
 /**/.ruby-version
 vendor/
 
 # iOS / CocoaPods
-/packages/helloworld/ios/build/
-/packages/helloworld/ios/Pods/
-/packages/helloworld/ios/Podfile.lock
+/private/helloworld/ios/build/
+/private/helloworld/ios/Pods/
+/private/helloworld/ios/Podfile.lock
+/packages/rn-tester/bin/
+/packages/rn-tester/cache/
+/packages/rn-tester/extensions/
+/packages/rn-tester/gems/
+/packages/rn-tester/specifications/
 /packages/rn-tester/Gemfile.lock
 /packages/**/RCTLegacyInteropComponents.mm
+/packages/sourcemap.ios.map
 
 # Ignore RNTester specific Pods, but keep the __offline_mirrors__ here.
 /packages/rn-tester/Pods/*
 !/packages/rn-tester/Pods/__offline_mirrors_hermes__
 !/packages/rn-tester/Pods/__offline_mirrors_jsc__
 
+# Swift Package build folder
+/packages/react-native/.build
+/packages/react-native/.swiftpm
+/packages/react-native/React/includes/
+
 # @react-native/codegen
 /packages/react-native/React/FBReactNativeSpec/
 /packages/react-native-codegen/lib
 /packages/react-native-codegen/tmp/
-/packages/react-native/ReactCommon/react/renderer/components/rncore/
 /packages/rn-tester/NativeModuleExample/ScreenshotManagerSpec*
 /**/RCTThirdPartyFabricComponentsProvider.*
 
 # @react-native/codegen-typescript-test
-/packages/react-native-codegen-typescript-test/lib
+/private/react-native-codegen-typescript-test/lib
 
 # Additional SDKs
 /packages/react-native/sdks/download
@@ -160,8 +170,12 @@ fix_*.patch
 .metro-health-check*
 
 # Jest Integration
-/packages/react-native-fantom/build/
-/packages/react-native-fantom/tester/build/
+/private/react-native-fantom/build/
+/private/react-native-fantom/.out/
+/private/react-native-fantom/tester/build/
 
 # [Experimental] Generated TS type definitions
 /packages/**/types_generated/
+
+/packages/debugger-shell/build/
+/packages/*/dist/

.prettierrc

@@ -1,36 +0,0 @@
-{
-  "arrowParens": "avoid",
-  "bracketSameLine": true,
-  "bracketSpacing": false,
-  "requirePragma": true,
-  "singleQuote": true,
-  "trailingComma": "all",
-  "endOfLine": "lf",
-  "overrides": [
-    {
-      "files": ["*.code-workspace"],
-      "options": {
-        "parser": "json"
-      }
-    },
-    {
-      "files": [
-        "*.js",
-        "*.js.flow"
-      ],
-      "options": {
-        "parser": "hermes"
-      }
-    },
-    {
-      "files": [
-        "**/__docs__/*.md"
-      ],
-      "options": {
-        "parser": "markdown",
-        "proseWrap": "always",
-        "requirePragma": false
-      }
-    }
-  ]
-}

.prettierrc.js

@@ -0,0 +1,46 @@
+/**
+ * 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.
+ *
+ * @format
+ */
+
+let plugins = ['prettier-plugin-hermes-parser'];
+try {
+  plugins = require('./.prettier-plugins.fb.js');
+} catch {}
+
+module.exports = {
+  arrowParens: 'avoid',
+  bracketSameLine: true,
+  bracketSpacing: false,
+  requirePragma: true,
+  singleQuote: true,
+  trailingComma: 'all',
+  endOfLine: 'lf',
+  plugins,
+  overrides: [
+    {
+      files: ['*.code-workspace'],
+      options: {
+        parser: 'json',
+      },
+    },
+    {
+      files: ['*.js', '*.js.flow'],
+      options: {
+        parser: 'hermes',
+      },
+    },
+    {
+      files: ['**/__docs__/*.md'],
+      options: {
+        parser: 'markdown',
+        proseWrap: 'always',
+        requirePragma: false,
+      },
+    },
+  ],
+};

ECOSYSTEM.md

@@ -28,7 +28,7 @@ Examples of contributing to the release include being a [community releaser](htt
 
 ### Current partners:
 * **[Coinbase](https://www.coinbase.com/):** Publishes [posts](https://blog.coinbase.com/tagged/react-native) advocating React Native usage. Supports `@react-native-community/datetimepicker` and other community modules to migrate to the new architecture. Supports releases in testing and feedback.
-* **[Callstack](https://callstack.com/):** Maintains the [React Native CLI](https://github.com/react-native-community/react-native-cli) and [other community libraries](https://github.com/callstack), organizes [React Native EU](https://react-native.eu/) and hosts [The React Native Show podcast](https://www.callstack.com/podcast-react-native-show)
+* **[Callstack](https://callstack.com/):** Maintains [React Native Community CLI](https://github.com/react-native-community/cli), develops [RNEF](https://rnef.dev), [Re.Pack](https://re-pack.dev) and [other community libraries](https://github.com/callstack). Hosts [React Universe Conf](https://www.reactuniverseconf.com/) and [React Universe On Air](https://www.callstack.com/podcast).
 * **[Expo](https://expo.dev/):** Builds [Expo Go and SDK](https://github.com/expo/expo), [Snack](https://snack.expo.dev/), and [Expo Application Services](https://expo.dev/eas). Maintains [React Native Directory](https://reactnative.directory/), stewards [React Navigation](https://reactnavigation.org/) along with other partners.
 * **[Infinite Red](https://infinite.red/):** Maintains the [ignite cli/boilerplate](https://github.com/infinitered/ignite), organizes [Chain React Conf](https://cr.infinite.red/), hosts the [React Native Radio podcast](https://reactnativeradio.com), publishes the [React Native Newsletter](https://reactnativenewsletter.com)
 * **[Meta](https://opensource.fb.com/):** Oversees the React Native product and maintains the [React Native core repo](https://reactnative.dev/) 

README.md

@@ -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>
 
@@ -138,7 +141,4 @@ Larger discussions and proposals are discussed in [**@react-native-community/dis
 
 React Native is MIT licensed, as found in the [LICENSE][l] file.
 
-React Native documentation is Creative Commons licensed, as found in the [LICENSE-docs][ld] file.
-
 [l]: https://github.com/facebook/react-native/blob/main/LICENSE
-[ld]: https://github.com/facebook/react-native/blob/main/LICENSE-docs

__docs__/README.md

@@ -45,6 +45,8 @@ TODO: Explain the different components of React Native at a high level.
     - UI / Fabric
       - Events
       - Shadow Tree Lifecycle
+        - [Runtime Shadow Node Reference Update](../packages/react-native/ReactCommon/react/renderer/core/__docs__/RSNRU.md)
+        - [passChildrenWhenCloningPersistedNodes](../packages/react-native/ReactCommon/react/renderer/core/__docs__/passChildrenWhenCloning.md)
       - Layout
       - Mounting
     - Native Modules / TurboModules
@@ -88,7 +90,7 @@ TODO: Explain the different components of React Native at a high level.
     - Jest
     - ESLint
   - Integration / E2E
-    - [Fantom](../packages/react-native-fantom/__docs__/README.md)
+    - [Fantom](../private/react-native-fantom/__docs__/README.md)
 - Tooling
   - React Native DevTools
 

build.gradle.kts

@@ -13,6 +13,7 @@ plugins {
   alias(libs.plugins.kotlin.android) apply false
   alias(libs.plugins.binary.compatibility.validator) apply true
   alias(libs.plugins.android.test) apply false
+  alias(libs.plugins.ktfmt) apply true
 }
 
 val reactAndroidProperties = java.util.Properties()
@@ -25,10 +26,12 @@ fun getListReactAndroidProperty(name: String) = reactAndroidProperties.getProper
 
 apiValidation {
   ignoredPackages.addAll(
-      getListReactAndroidProperty("binaryCompatibilityValidator.ignoredPackages"))
+      getListReactAndroidProperty("binaryCompatibilityValidator.ignoredPackages")
+  )
   ignoredClasses.addAll(getListReactAndroidProperty("binaryCompatibilityValidator.ignoredClasses"))
   nonPublicMarkers.addAll(
-      getListReactAndroidProperty("binaryCompatibilityValidator.nonPublicMarkers"))
+      getListReactAndroidProperty("binaryCompatibilityValidator.nonPublicMarkers")
+  )
   validationDisabled =
       reactAndroidProperties
           .getProperty("binaryCompatibilityValidator.validationDisabled")
@@ -36,8 +39,9 @@ apiValidation {
 }
 
 version =
-    if (project.hasProperty("isSnapshot") &&
-        (project.property("isSnapshot") as? String).toBoolean()) {
+    if (
+        project.hasProperty("isSnapshot") && (project.property("isSnapshot") as? String).toBoolean()
+    ) {
       "${reactAndroidProperties.getProperty("VERSION_NAME")}-SNAPSHOT"
     } else {
       reactAndroidProperties.getProperty("VERSION_NAME")
@@ -55,6 +59,8 @@ nexusPublishing {
     sonatype {
       username.set(sonatypeUsername)
       password.set(sonatypePassword)
+      nexusUrl.set(uri("https://ossrh-staging-api.central.sonatype.com/service/local/"))
+      snapshotRepositoryUrl.set(uri("https://central.sonatype.com/repository/maven-snapshots/"))
     }
   }
 }
@@ -63,8 +69,10 @@ tasks.register("clean", Delete::class.java) {
   description = "Remove all the build files and intermediate build outputs"
   dependsOn(gradle.includedBuild("gradle-plugin").task(":clean"))
   subprojects.forEach {
-    if (it.project.plugins.hasPlugin("com.android.library") ||
-        it.project.plugins.hasPlugin("com.android.application")) {
+    if (
+        it.project.plugins.hasPlugin("com.android.library") ||
+            it.project.plugins.hasPlugin("com.android.application")
+    ) {
       dependsOn(it.tasks.named("clean"))
     }
   }
@@ -74,10 +82,13 @@ tasks.register("clean", Delete::class.java) {
   delete(rootProject.file("./packages/react-native/sdks/download/"))
   delete(rootProject.file("./packages/react-native/sdks/hermes/"))
   delete(
-      rootProject.file("./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/arm64-v8a/"))
+      rootProject.file("./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/arm64-v8a/")
+  )
   delete(
       rootProject.file(
-          "./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/armeabi-v7a/"))
+          "./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/armeabi-v7a/"
+      )
+  )
   delete(rootProject.file("./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/x86/"))
   delete(rootProject.file("./packages/react-native/ReactAndroid/src/main/jni/prebuilt/lib/x86_64/"))
   delete(rootProject.file("./packages/react-native-codegen/lib"))
@@ -93,9 +104,6 @@ tasks.register("build") {
 tasks.register("publishAllToMavenTempLocal") {
   description = "Publish all the artifacts to be available inside a Maven Local repository on /tmp."
   dependsOn(":packages:react-native:ReactAndroid:publishAllPublicationsToMavenTempLocalRepository")
-  // We don't publish the external-artifacts to Maven Local as ci is using it via workspace.
-  dependsOn(
-      ":packages:react-native:ReactAndroid:hermes-engine:publishAllPublicationsToMavenTempLocalRepository")
 }
 
 tasks.register("publishAndroidToSonatype") {
@@ -116,15 +124,56 @@ if (project.findProperty("react.internal.useHermesNightly")?.toString()?.toBoole
 
       That's fine for local development, but you should not commit this change.
       ********************************************************************************
-  """
-          .trimIndent())
+      """
+          .trimIndent()
+  )
   allprojects {
     configurations.all {
       resolutionStrategy.dependencySubstitution {
         substitute(project(":packages:react-native:ReactAndroid:hermes-engine"))
-            .using(module("com.facebook.react:hermes-android:0.0.0-+"))
+            .using(module("com.facebook.hermes:hermes-android:0.+"))
             .because("Users opted to use hermes from nightly")
       }
     }
   }
 }
+
+ktfmt {
+  blockIndent.set(2)
+  continuationIndent.set(4)
+  maxWidth.set(100)
+  removeUnusedImports.set(false)
+  manageTrailingCommas.set(false)
+}
+
+// Configure ktfmt tasks to include gradle-plugin
+listOf("ktfmtCheck", "ktfmtFormat").forEach { taskName ->
+  tasks.named(taskName) { dependsOn(gradle.includedBuild("gradle-plugin").task(":$taskName")) }
+}
+
+allprojects {
+  // Apply exclusions for specific files that should not be formatted
+  val excludePatterns =
+      listOf(
+          "**/build/**",
+          "**/hermes-engine/**",
+          "**/internal/featureflags/**",
+          "**/systeminfo/ReactNativeVersion.kt",
+      )
+  listOf(
+          com.ncorti.ktfmt.gradle.tasks.KtfmtCheckTask::class,
+          com.ncorti.ktfmt.gradle.tasks.KtfmtFormatTask::class,
+      )
+      .forEach { tasks.withType(it) { exclude(excludePatterns) } }
+
+  // Disable the problematic ktfmt script tasks due to symbolic link issues in subprojects
+  afterEvaluate {
+    listOf("ktfmtCheckScripts", "ktfmtFormatScripts").forEach {
+      tasks.findByName(it)?.enabled = false
+    }
+  }
+}
+
+// We intentionally disable the `ktfmtCheck` tasks as the formatting is primarly handled inside
+// fbsource
+allprojects { tasks.withType<com.ncorti.ktfmt.gradle.tasks.KtfmtCheckTask>() { enabled = false } }

flow-typed/environment/node.js

@@ -4,8 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @flow
  * @format
- * @oncall flow
  */
 
 // Adapted from https://github.com/flow-typed/flow-typed/blob/main/definitions/environments/node/flow_v0.261.x-/node.js
@@ -3057,30 +3057,30 @@ type util$InspectOptions = {
 };
 
 declare type util$ParseArgsOption =
-  | {|
+  | $ReadOnly<{|
       type: 'boolean',
       multiple?: false,
       short?: string,
       default?: boolean,
-    |}
-  | {|
+    |}>
+  | $ReadOnly<{|
       type: 'boolean',
       multiple: true,
       short?: string,
       default?: Array<boolean>,
-    |}
-  | {|
+    |}>
+  | $ReadOnly<{|
       type: 'string',
       multiple?: false,
       short?: string,
       default?: string,
-    |}
-  | {|
+    |}>
+  | $ReadOnly<{|
       type: 'string',
       multiple: true,
       short?: string,
       default?: Array<string>,
-    |};
+    |}>;
 
 type util$ParseArgsOptionToValue<TOption> = TOption['type'] extends 'boolean'
   ? TOption['multiple'] extends true
@@ -3137,7 +3137,7 @@ declare module 'util' {
   declare function stripVTControlCharacters(str: string): string;
 
   declare function parseArgs<
-    TOptions: {[string]: util$ParseArgsOption} = {||},
+    TOptions: {+[string]: util$ParseArgsOption} = {||},
   >(config: {|
     args?: Array<string>,
     options?: TOptions,
@@ -3229,6 +3229,73 @@ declare module 'util' {
     isWebAssemblyCompiledModule: (value: mixed) => boolean,
     ...
   };
+
+  declare type BackgroundColors =
+    | 'bgBlack'
+    | 'bgBlackBright'
+    | 'bgBlue'
+    | 'bgBlueBright'
+    | 'bgCyan'
+    | 'bgCyanBright'
+    | 'bgGray'
+    | 'bgGreen'
+    | 'bgGreenBright'
+    | 'bgGrey'
+    | 'bgMagenta'
+    | 'bgMagentaBright'
+    | 'bgRed'
+    | 'bgRedBright'
+    | 'bgWhite'
+    | 'bgWhiteBright'
+    | 'bgYellow'
+    | 'bgYellowBright';
+
+  declare type ForegroundColors =
+    | 'black'
+    | 'blackBright'
+    | 'blue'
+    | 'blueBright'
+    | 'cyan'
+    | 'cyanBright'
+    | 'gray'
+    | 'green'
+    | 'greenBright'
+    | 'grey'
+    | 'magenta'
+    | 'magentaBright'
+    | 'red'
+    | 'redBright'
+    | 'white'
+    | 'whiteBright'
+    | 'yellow'
+    | 'yellowBright';
+
+  declare type Modifiers =
+    | 'blink'
+    | 'bold'
+    | 'dim'
+    | 'doubleunderline'
+    | 'framed'
+    | 'hidden'
+    | 'inverse'
+    | 'italic'
+    | 'overlined'
+    | 'reset'
+    | 'strikethrough'
+    | 'underline';
+
+  declare function styleText(
+    format:
+      | ForegroundColors
+      | BackgroundColors
+      | Modifiers
+      | $ReadOnlyArray<ForegroundColors | BackgroundColors | Modifiers>,
+    text: string,
+    options?: $ReadOnly<{
+      stream?: ?stream$Stream,
+      validStream?: ?boolean,
+    }>,
+  ): string;
 }
 
 type vm$ScriptOptions = {
@@ -3928,13 +3995,16 @@ declare class Process extends events$EventEmitter {
   initgroups?: (user: number | string, extra_group: number | string) => void;
   kill(pid: number, signal?: string | number): void;
   mainModule: Object;
-  memoryUsage(): {
-    arrayBuffers: number,
-    rss: number,
-    heapTotal: number,
-    heapUsed: number,
-    external: number,
-    ...
+  memoryUsage: {
+    (): {
+      arrayBuffers: number,
+      rss: number,
+      heapTotal: number,
+      heapUsed: number,
+      external: number,
+      ...
+    },
+    rss: () => number,
   };
   nextTick: <T>(cb: (...T) => mixed, ...T) => void;
   pid: number;

flow-typed/npm/@expo/spawn-async_v1.x.x.js

@@ -0,0 +1,46 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+declare module '@expo/spawn-async' {
+  type SpawnOptions = {
+    cwd?: string,
+    env?: Object,
+    argv0?: string,
+    stdio?: string | Array<any>,
+    detached?: boolean,
+    uid?: number,
+    gid?: number,
+    shell?: boolean | string,
+    windowsVerbatimArguments?: boolean,
+    windowsHide?: boolean,
+    encoding?: string,
+    ignoreStdio?: boolean,
+  };
+
+  declare class SpawnPromise<T> extends Promise<T> {
+    child: child_process$ChildProcess;
+  }
+  type SpawnResult = {
+    pid?: number,
+    output: string[],
+    stdout: string,
+    stderr: string,
+    status: number | null,
+    signal: string | null,
+  };
+
+  declare function spawnAsync(
+    command: string,
+    args?: $ReadOnlyArray<string>,
+    options?: SpawnOptions,
+  ): SpawnPromise<SpawnResult>;
+
+  declare module.exports: typeof spawnAsync;
+}

flow-typed/npm/@octokit/rest_v22.x.x.js

@@ -0,0 +1,61 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+// Partial types for Octokit based on the usage in react-native-github
+declare module '@octokit/rest' {
+  declare class Octokit {
+    constructor(options?: {auth?: string, ...}): this;
+
+    repos: $ReadOnly<{
+      listReleaseAssets: (
+        params: $ReadOnly<{
+          owner: string,
+          repo: string,
+          release_id: string,
+        }>,
+      ) => Promise<{
+        data: Array<{
+          id: string,
+          name: string,
+          ...
+        }>,
+        ...
+      }>,
+      uploadReleaseAsset: (
+        params: $ReadOnly<{
+          owner: string,
+          repo: string,
+          release_id: string,
+          name: string,
+          data: Buffer,
+          headers: $ReadOnly<{
+            'content-type': string,
+            ...
+          }>,
+          ...
+        }>,
+      ) => Promise<{
+        data: {
+          browser_download_url: string,
+          ...
+        },
+        ...
+      }>,
+      deleteReleaseAsset: (params: {
+        owner: string,
+        repo: string,
+        asset_id: string,
+        ...
+      }) => Promise<mixed>,
+    }>;
+  }
+
+  declare export {Octokit};
+}

flow-typed/npm/@react-native-community/cli-server-api_v19.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module '@react-native-community/cli-server-api' {

flow-typed/npm/@react-native-community/cli-types_v19.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow
  * @format
- * @oncall react_native
  */
 
 declare module '@react-native-community/cli-types' {

flow-typed/npm/@tsconfig/node22_v22.x.x.js

@@ -8,6 +8,6 @@
  * @format
  */
 
-declare module '@tsconfig/node18/tsconfig.json' {
+declare module '@tsconfig/node22/tsconfig.json' {
   declare module.exports: any;
 }

flow-typed/npm/actual-request-url_v1.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict-local
  * @format
- * @oncall react_native
  */
 
 declare module 'actual-request-url' {

flow-typed/npm/babel-traverse_v7.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow
  * @format
- * @oncall react_native
  */
 
 // The sections between BEGIN GENERATED and END GENERATED are generated

flow-typed/npm/chalk_v4.x.x.js

@@ -1,231 +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.
- *
- * @flow
- * @format
- * @oncall react_native
- */
-
-// flow-typed signature: 79cfa6bcaa67fdb60f10d320da0470fc
-// flow-typed version: 6cecea2e51/chalk_v4.x.x/flow_>=v0.104.x
-
-// From: https://github.com/chalk/chalk/blob/master/index.d.ts
-
-declare module 'chalk' {
-  declare type ForegroundColor =
-    | 'black'
-    | 'red'
-    | 'green'
-    | 'yellow'
-    | 'blue'
-    | 'magenta'
-    | 'cyan'
-    | 'white'
-    | 'gray'
-    | 'grey'
-    | 'blackBright'
-    | 'redBright'
-    | 'greenBright'
-    | 'yellowBright'
-    | 'blueBright'
-    | 'magentaBright'
-    | 'cyanBright'
-    | 'whiteBright';
-
-  declare type BackgroundColor =
-    | 'bgBlack'
-    | 'bgRed'
-    | 'bgGreen'
-    | 'bgYellow'
-    | 'bgBlue'
-    | 'bgMagenta'
-    | 'bgCyan'
-    | 'bgWhite'
-    | 'bgGray'
-    | 'bgGrey'
-    | 'bgBlackBright'
-    | 'bgRedBright'
-    | 'bgGreenBright'
-    | 'bgYellowBright'
-    | 'bgBlueBright'
-    | 'bgMagentaBright'
-    | 'bgCyanBright'
-    | 'bgWhiteBright';
-
-  declare type Color = ForegroundColor | BackgroundColor;
-
-  declare type Modifiers =
-    | 'reset'
-    | 'bold'
-    | 'dim'
-    | 'italic'
-    | 'underline'
-    | 'inverse'
-    | 'hidden'
-    | 'strikethrough'
-    | 'visible';
-
-  declare type TemplateStringsArray = $ReadOnlyArray<string>;
-
-  declare type Level = $Values<{
-    None: 0,
-    Basic: 1,
-    Ansi256: 2,
-    TrueColor: 3,
-    ...
-  }>;
-
-  declare type ChalkOptions = {|
-    level?: Level,
-  |};
-
-  declare type ColorSupport = {|
-    level: Level,
-    hasBasic: boolean,
-    has256: boolean,
-    has16m: boolean,
-  |};
-
-  declare class Instance implements Chalk {
-    constructor(options?: ChalkOptions): this;
-
-    (...text: string[]): string;
-    (text: TemplateStringsArray, ...placeholders: string[]): string;
-    Instance: typeof Instance;
-    level: Level;
-    rgb(r: number, g: number, b: number): Chalk;
-    hsl(h: number, s: number, l: number): Chalk;
-    hsv(h: number, s: number, v: number): Chalk;
-    hwb(h: number, w: number, b: number): Chalk;
-    bgHex(color: string): Chalk;
-    bgKeyword(color: string): Chalk;
-    bgRgb(r: number, g: number, b: number): Chalk;
-    bgHsl(h: number, s: number, l: number): Chalk;
-    bgHsv(h: number, s: number, v: number): Chalk;
-    bgHwb(h: number, w: number, b: number): Chalk;
-    hex(color: string): Chalk;
-    keyword(color: string): Chalk;
-
-    +reset: Chalk;
-    +bold: Chalk;
-    +dim: Chalk;
-    +italic: Chalk;
-    +underline: Chalk;
-    +inverse: Chalk;
-    +hidden: Chalk;
-    +strikethrough: Chalk;
-
-    +visible: Chalk;
-
-    +black: Chalk;
-    +red: Chalk;
-    +green: Chalk;
-    +yellow: Chalk;
-    +blue: Chalk;
-    +magenta: Chalk;
-    +cyan: Chalk;
-    +white: Chalk;
-    +gray: Chalk;
-    +grey: Chalk;
-    +blackBright: Chalk;
-    +redBright: Chalk;
-    +greenBright: Chalk;
-    +yellowBright: Chalk;
-    +blueBright: Chalk;
-    +magentaBright: Chalk;
-    +cyanBright: Chalk;
-    +whiteBright: Chalk;
-
-    +bgBlack: Chalk;
-    +bgRed: Chalk;
-    +bgGreen: Chalk;
-    +bgYellow: Chalk;
-    +bgBlue: Chalk;
-    +bgMagenta: Chalk;
-    +bgCyan: Chalk;
-    +bgWhite: Chalk;
-    +bgBlackBright: Chalk;
-    +bgRedBright: Chalk;
-    +bgGreenBright: Chalk;
-    +bgYellowBright: Chalk;
-    +bgBlueBright: Chalk;
-    +bgMagentaBright: Chalk;
-    +bgCyanBright: Chalk;
-    +bgWhiteBright: Chalk;
-
-    supportsColor: ColorSupport;
-  }
-
-  declare interface Chalk {
-    (...text: string[]): string;
-    (text: TemplateStringsArray, ...placeholders: string[]): string;
-    Instance: typeof Instance;
-    level: Level;
-    rgb(r: number, g: number, b: number): Chalk;
-    hsl(h: number, s: number, l: number): Chalk;
-    hsv(h: number, s: number, v: number): Chalk;
-    hwb(h: number, w: number, b: number): Chalk;
-    bgHex(color: string): Chalk;
-    bgKeyword(color: string): Chalk;
-    bgRgb(r: number, g: number, b: number): Chalk;
-    bgHsl(h: number, s: number, l: number): Chalk;
-    bgHsv(h: number, s: number, v: number): Chalk;
-    bgHwb(h: number, w: number, b: number): Chalk;
-    hex(color: string): Chalk;
-    keyword(color: string): Chalk;
-
-    +reset: Chalk;
-    +bold: Chalk;
-    +dim: Chalk;
-    +italic: Chalk;
-    +underline: Chalk;
-    +inverse: Chalk;
-    +hidden: Chalk;
-    +strikethrough: Chalk;
-
-    +visible: Chalk;
-
-    +black: Chalk;
-    +red: Chalk;
-    +green: Chalk;
-    +yellow: Chalk;
-    +blue: Chalk;
-    +magenta: Chalk;
-    +cyan: Chalk;
-    +white: Chalk;
-    +gray: Chalk;
-    +grey: Chalk;
-    +blackBright: Chalk;
-    +redBright: Chalk;
-    +greenBright: Chalk;
-    +yellowBright: Chalk;
-    +blueBright: Chalk;
-    +magentaBright: Chalk;
-    +cyanBright: Chalk;
-    +whiteBright: Chalk;
-
-    +bgBlack: Chalk;
-    +bgRed: Chalk;
-    +bgGreen: Chalk;
-    +bgYellow: Chalk;
-    +bgBlue: Chalk;
-    +bgMagenta: Chalk;
-    +bgCyan: Chalk;
-    +bgWhite: Chalk;
-    +bgBlackBright: Chalk;
-    +bgRedBright: Chalk;
-    +bgGreenBright: Chalk;
-    +bgYellowBright: Chalk;
-    +bgBlueBright: Chalk;
-    +bgMagentaBright: Chalk;
-    +bgCyanBright: Chalk;
-    +bgWhiteBright: Chalk;
-
-    supportsColor: ColorSupport;
-  }
-
-  declare module.exports: Chalk;
-}

flow-typed/npm/chrome-launcher_v0.15.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'chrome-launcher' {

flow-typed/npm/chromium-edge-launcher_v0.2.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'chromium-edge-launcher' {

flow-typed/npm/commander_v12.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  * @generated
  */
 

flow-typed/npm/connect_v3.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'connect' {

flow-typed/npm/cross-spawn_v7.x.x.js

@@ -0,0 +1,20 @@
+/**
+ * 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.
+ *
+ * @flow strict
+ * @format
+ */
+
+declare module 'cross-spawn' {
+  import * as child_process from 'child_process';
+
+  type spawn = typeof child_process.spawn & {
+    spawn: spawn,
+    sync: typeof child_process.spawnSync,
+  };
+
+  declare module.exports: spawn;
+}

flow-typed/npm/electron-packager_v18.x.x.js

@@ -0,0 +1,149 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+declare module '@electron/packager' {
+  declare export type AsarOptions = $FlowFixMe;
+
+  declare export type ElectronDownloadRequestOptions = $FlowFixMe;
+
+  declare export type TargetDefinition = {
+    arch: TargetArch,
+    platform: TargetPlatform,
+  };
+
+  declare export type FinalizePackageTargetsHookFunction = (
+    targets: TargetDefinition[],
+    callback: HookFunctionErrorCallback,
+  ) => void;
+
+  declare export type HookFunction = (
+    buildPath: string,
+    electronVersion: string,
+    platform: TargetPlatform,
+    arch: TargetArch,
+    callback: HookFunctionErrorCallback,
+  ) => void;
+
+  declare export type IgnoreFunction = (path: string) => boolean;
+
+  declare export type HookFunctionErrorCallback = (err?: Error | null) => void;
+
+  declare export interface MacOSProtocol {
+    name: string;
+    schemes: string[];
+  }
+
+  declare export type NotaryToolCredentials = $FlowFixMe;
+
+  declare export type OsxSignOptions = $FlowFixMe;
+
+  declare export type OsxUniversalOptions = $FlowFixMe;
+
+  declare export type Win32MetadataOptions = $ReadOnly<{
+    CompanyName?: string,
+    FileDescription?: string,
+    OriginalFilename?: string,
+    ProductName?: string,
+    InternalName?: string,
+    'requested-execution-level'?:
+      | 'asInvoker'
+      | 'highestAvailable'
+      | 'requireAdministrator',
+    'application-manifest'?: string,
+  }>;
+
+  declare export type WindowsSignOptions = $FlowFixMe;
+
+  declare export type OfficialArch =
+    | 'ia32'
+    | 'x64'
+    | 'armv7l'
+    | 'arm64'
+    | 'mips64el'
+    | 'universal';
+
+  declare export type OfficialPlatform = 'linux' | 'win32' | 'darwin' | 'mas';
+
+  declare export type TargetArch = OfficialArch | string;
+
+  declare export type TargetPlatform = OfficialPlatform | string;
+
+  declare export type ArchOption = TargetArch | 'all';
+
+  declare export type PlatformOption = TargetPlatform | 'all';
+
+  declare export interface Options {
+    dir: string;
+    afterAsar?: HookFunction[];
+    afterComplete?: HookFunction[];
+    afterCopy?: HookFunction[];
+    afterCopyExtraResources?: HookFunction[];
+    afterExtract?: HookFunction[];
+    afterFinalizePackageTargets?: FinalizePackageTargetsHookFunction[];
+    afterInitialize?: HookFunction[];
+    afterPrune?: HookFunction[];
+    all?: boolean;
+    appBundleId?: string;
+    appCategoryType?: string;
+    appCopyright?: string;
+    appVersion?: string;
+    arch?: ArchOption | ArchOption[];
+    asar?: boolean | AsarOptions;
+    beforeAsar?: HookFunction[];
+    beforeCopy?: HookFunction[];
+    beforeCopyExtraResources?: HookFunction[];
+    buildVersion?: string;
+    darwinDarkModeSupport?: boolean;
+    derefSymlinks?: boolean;
+    download?: ElectronDownloadRequestOptions;
+    electronVersion?: string;
+    electronZipDir?: string;
+    executableName?: string;
+    extendHelperInfo?:
+      | string
+      | {
+          [property: string]: any,
+        };
+    extendInfo?:
+      | string
+      | {
+          [property: string]: any,
+        };
+    extraResource?: string | string[];
+    helperBundleId?: string;
+    icon?: string;
+    ignore?: RegExp | (string | RegExp)[] | IgnoreFunction;
+    junk?: boolean;
+    name?: string;
+    osxNotarize?: NotaryToolCredentials;
+    osxSign?: true | OsxSignOptions;
+    osxUniversal?: OsxUniversalOptions;
+    out?: string;
+    overwrite?: boolean;
+    platform?: TargetPlatform | 'all' | Array<TargetPlatform | 'all'>;
+    prebuiltAsar?: string;
+    protocols?: MacOSProtocol[];
+    prune?: boolean;
+    quiet?: boolean;
+    tmpdir?: string | false;
+    usageDescription?: {
+      [property: string]: string,
+    };
+    win32metadata?: Win32MetadataOptions;
+    windowsSign?: true | WindowsSignOptions;
+  }
+
+  declare function packager(options: Options): Promise<string[]>;
+
+  declare module.exports: typeof packager & {
+    packager: typeof packager,
+    default: typeof packager,
+  };
+}

flow-typed/npm/electron_v36.x.x.js

@@ -8,12 +8,7 @@
  * @format
  */
 
-export default {
-  primary: '#1292B4',
-  white: '#FFF',
-  lighter: '#F3F3F3',
-  light: '#DAE1E7',
-  dark: '#444',
-  darker: '#222',
-  black: '#000',
-};
+// Types for Electron when required as a Node package.
+declare module 'electron' {
+  declare module.exports: string;
+}

flow-typed/npm/execa_v5.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 // Modified from flow-typed repo:

flow-typed/npm/fb-dotslash_v0.x.x.js

@@ -0,0 +1,13 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+declare module 'fb-dotslash' {
+  declare module.exports: string;
+}

flow-typed/npm/jest-diff_v29.x.x.js

@@ -3,7 +3,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'jest-diff' {

flow-typed/npm/jest-snapshot_v29.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'jest-snapshot' {

flow-typed/npm/jest.js

@@ -4,15 +4,14 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
+ * @flow
  * @format
- * @oncall react_native
  */
 
 // Modified from https://raw.githubusercontent.com/flow-typed/flow-typed/master/definitions/npm/jest_v29.x.x/flow_v0.134.x-/jest_v29.x.x.js
 // Modifications are explained inline by comments beginning with `// MODIFIED`.
 
 // MODIFIED: Added ESLint suppression comment - no-unused-vars doesn't understand declaration files
-/* eslint-disable no-unused-vars */
 
 type JestMockFn<TArguments: $ReadOnlyArray<mixed>, TReturn> = {
   (...args: TArguments): TReturn,
@@ -855,6 +854,10 @@ type JestObjectType = {
    * Returns the number of fake timers still left to run.
    */
   getTimerCount(): number,
+  /**
+   * Returns the time in ms of the current clock.
+   */
+  now(): number,
   /**
    * Set the current system time used by fake timers.
    * Simulates a user changing the system clock while your program is running.

flow-typed/npm/jsonc-parser_v2.2.x.js

@@ -0,0 +1,421 @@
+/**
+ * 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.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+declare module 'jsonc-parser' {
+  /**
+   * Creates a JSON scanner on the given text.
+   * If ignoreTrivia is set, whitespaces or comments are ignored.
+   */
+  declare export const createScanner: (
+    text: string,
+    ignoreTrivia?: boolean,
+  ) => JSONScanner;
+  export type ScanError = number;
+  export type SyntaxKind = number;
+  /**
+   * The scanner object, representing a JSON scanner at a position in the input string.
+   */
+  export type JSONScanner = $ReadOnly<{
+    /**
+     * Sets the scan position to a new offset. A call to 'scan' is needed to get the first token.
+     */
+    setPosition(pos: number): void,
+    /**
+     * Read the next token. Returns the token code.
+     */
+    scan(): SyntaxKind,
+    /**
+     * Returns the zero-based current scan position, which is after the last read token.
+     */
+    getPosition(): number,
+    /**
+     * Returns the last read token.
+     */
+    getToken(): SyntaxKind,
+    /**
+     * Returns the last read token value. The value for strings is the decoded string content. For numbers it's of type number, for boolean it's true or false.
+     */
+    getTokenValue(): string,
+    /**
+     * The zero-based start offset of the last read token.
+     */
+    getTokenOffset(): number,
+    /**
+     * The length of the last read token.
+     */
+    getTokenLength(): number,
+    /**
+     * The zero-based start line number of the last read token.
+     */
+    getTokenStartLine(): number,
+    /**
+     * The zero-based start character (column) of the last read token.
+     */
+    getTokenStartCharacter(): number,
+    /**
+     * An error code of the last scan.
+     */
+    getTokenError(): ScanError,
+  }>;
+  /**
+   * For a given offset, evaluate the location in the JSON document. Each segment in the location path is either a property name or an array index.
+   */
+  declare export const getLocation: (
+    text: string,
+    position: number,
+  ) => Location;
+  /**
+   * Parses the given text and returns the object the JSON content represents. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
+   * Therefore, always check the errors list to find out if the input was valid.
+   */
+  declare export const parse: (
+    text: string,
+    errors?: ParseError[],
+    options?: ParseOptions,
+  ) => any;
+  /**
+   * Parses the given text and returns a tree representation the JSON content. On invalid input, the parser tries to be as fault tolerant as possible, but still return a result.
+   */
+  declare export const parseTree: (
+    text: string,
+    errors?: ParseError[],
+    options?: ParseOptions,
+  ) => Node | void;
+  /**
+   * Finds the node at the given path in a JSON DOM.
+   */
+  declare export const findNodeAtLocation: (
+    root: Node,
+    path: JSONPath,
+  ) => Node | void;
+  /**
+   * Finds the innermost node at the given offset. If includeRightBound is set, also finds nodes that end at the given offset.
+   */
+  declare export const findNodeAtOffset: (
+    root: Node,
+    offset: number,
+    includeRightBound?: boolean,
+  ) => Node | void;
+  /**
+   * Gets the JSON path of the given JSON DOM node
+   */
+  declare export const getNodePath: (node: Node) => JSONPath;
+  /**
+   * Evaluates the JavaScript object of the given JSON DOM node
+   */
+  declare export const getNodeValue: (node: Node) => any;
+  /**
+   * Parses the given text and invokes the visitor functions for each object, array and literal reached.
+   */
+  declare export const visit: (
+    text: string,
+    visitor: JSONVisitor,
+    options?: ParseOptions,
+  ) => any;
+  /**
+   * Takes JSON with JavaScript-style comments and remove
+   * them. Optionally replaces every none-newline character
+   * of comments with a replaceCharacter
+   */
+  declare export const stripComments: (
+    text: string,
+    replaceCh?: string,
+  ) => string;
+  export type ParseError = {
+    error: ParseErrorCode,
+    offset: number,
+    length: number,
+  };
+  export type ParseErrorCode = number;
+  declare export function printParseErrorCode(
+    code: ParseErrorCode,
+  ):
+    | 'InvalidSymbol'
+    | 'InvalidNumberFormat'
+    | 'PropertyNameExpected'
+    | 'ValueExpected'
+    | 'ColonExpected'
+    | 'CommaExpected'
+    | 'CloseBraceExpected'
+    | 'CloseBracketExpected'
+    | 'EndOfFileExpected'
+    | 'InvalidCommentToken'
+    | 'UnexpectedEndOfComment'
+    | 'UnexpectedEndOfString'
+    | 'UnexpectedEndOfNumber'
+    | 'InvalidUnicode'
+    | 'InvalidEscapeCharacter'
+    | 'InvalidCharacter'
+    | '<unknown ParseErrorCode>';
+  export type NodeType =
+    | 'object'
+    | 'array'
+    | 'property'
+    | 'string'
+    | 'number'
+    | 'boolean'
+    | 'null';
+  export type Node = {
+    type: NodeType,
+    value?: any,
+    offset: number,
+    length: number,
+    colonOffset?: number,
+    parent?: Node,
+    children?: Node[],
+  };
+  /**
+   * A {@linkcode JSONPath} segment. Either a string representing an object property name
+   * or a number (starting at 0) for array indices.
+   */
+  export type Segment = string | number;
+  export type JSONPath = Segment[];
+  export type Location = {
+    /**
+     * The previous property key or literal value (string, number, boolean or null) or undefined.
+     */
+    previousNode?: Node,
+    /**
+     * The path describing the location in the JSON document. The path consists of a sequence of strings
+     * representing an object property or numbers for array indices.
+     */
+    path: JSONPath,
+    /**
+     * Matches the locations path against a pattern consisting of strings (for properties) and numbers (for array indices).
+     * '*' will match a single segment of any property name or index.
+     * '**' will match a sequence of segments of any property name or index, or no segment.
+     */
+    matches: (patterns: JSONPath) => boolean,
+    /**
+     * If set, the location's offset is at a property key.
+     */
+    isAtPropertyKey: boolean,
+  };
+  export type ParseOptions = {
+    disallowComments?: boolean,
+    allowTrailingComma?: boolean,
+    allowEmptyContent?: boolean,
+  };
+  /**
+   * Visitor called by {@linkcode visit} when parsing JSON.
+   *
+   * The visitor functions have the following common parameters:
+   * - `offset`: Global offset within the JSON document, starting at 0
+   * - `startLine`: Line number, starting at 0
+   * - `startCharacter`: Start character (column) within the current line, starting at 0
+   *
+   * Additionally some functions have a `pathSupplier` parameter which can be used to obtain the
+   * current `JSONPath` within the document.
+   */
+  export type JSONVisitor = {
+    /**
+     * Invoked when an open brace is encountered and an object is started. The offset and length represent the location of the open brace.
+     */
+    onObjectBegin?: (
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+      pathSupplier: () => JSONPath,
+    ) => void,
+    /**
+     * Invoked when a property is encountered. The offset and length represent the location of the property name.
+     * The `JSONPath` created by the `pathSupplier` refers to the enclosing JSON object, it does not include the
+     * property name yet.
+     */
+    onObjectProperty?: (
+      property: string,
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+      pathSupplier: () => JSONPath,
+    ) => void,
+    /**
+     * Invoked when a closing brace is encountered and an object is completed. The offset and length represent the location of the closing brace.
+     */
+    onObjectEnd?: (
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+    ) => void,
+    /**
+     * Invoked when an open bracket is encountered. The offset and length represent the location of the open bracket.
+     */
+    onArrayBegin?: (
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+      pathSupplier: () => JSONPath,
+    ) => void,
+    /**
+     * Invoked when a closing bracket is encountered. The offset and length represent the location of the closing bracket.
+     */
+    onArrayEnd?: (
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+    ) => void,
+    /**
+     * Invoked when a literal value is encountered. The offset and length represent the location of the literal value.
+     */
+    onLiteralValue?: (
+      value: any,
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+      pathSupplier: () => JSONPath,
+    ) => void,
+    /**
+     * Invoked when a comma or colon separator is encountered. The offset and length represent the location of the separator.
+     */
+    onSeparator?: (
+      character: string,
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+    ) => void,
+    /**
+     * When comments are allowed, invoked when a line or block comment is encountered. The offset and length represent the location of the comment.
+     */
+    onComment?: (
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+    ) => void,
+    /**
+     * Invoked on an error.
+     */
+    onError?: (
+      error: ParseErrorCode,
+      offset: number,
+      length: number,
+      startLine: number,
+      startCharacter: number,
+    ) => void,
+  };
+  /**
+   * An edit result describes a textual edit operation. It is the result of a {@linkcode format} and {@linkcode modify} operation.
+   * It consist of one or more edits describing insertions, replacements or removals of text segments.
+   * * The offsets of the edits refer to the original state of the document.
+   * * No two edits change or remove the same range of text in the original document.
+   * * Multiple edits can have the same offset if they are multiple inserts, or an insert followed by a remove or replace.
+   * * The order in the array defines which edit is applied first.
+   * To apply an edit result use {@linkcode applyEdits}.
+   * In general multiple EditResults must not be concatenated because they might impact each other, producing incorrect or malformed JSON data.
+   */
+  export type EditResult = Edit[];
+  /**
+   * Represents a text modification
+   */
+  export type Edit = {
+    /**
+     * The start offset of the modification.
+     */
+    offset: number,
+    /**
+     * The length of the modification. Must not be negative. Empty length represents an *insert*.
+     */
+    length: number,
+    /**
+     * The new content. Empty content represents a *remove*.
+     */
+    content: string,
+  };
+  /**
+   * A text range in the document
+   */
+  export type Range = {
+    /**
+     * The start offset of the range.
+     */
+    offset: number,
+    /**
+     * The length of the range. Must not be negative.
+     */
+    length: number,
+  };
+  /**
+   * Options used by {@linkcode format} when computing the formatting edit operations
+   */
+  export type FormattingOptions = $ReadOnly<{
+    /**
+     * If indentation is based on spaces (`insertSpaces` = true), the number of spaces that make an indent.
+     */
+    tabSize?: number,
+    /**
+     * Is indentation based on spaces?
+     */
+    insertSpaces?: boolean,
+    /**
+     * The default 'end of line' character. If not set, '\n' is used as default.
+     */
+    eol?: string,
+  }>;
+  /**
+   * Computes the edit operations needed to format a JSON document.
+   *
+   * @param documentText The input text
+   * @param range The range to format or `undefined` to format the full content
+   * @param options The formatting options
+   * @returns The edit operations describing the formatting changes to the original document following the format described in {@linkcode EditResult}.
+   * To apply the edit operations to the input, use {@linkcode applyEdits}.
+   */
+  declare export function format(
+    documentText: string,
+    range: Range | void,
+    options: FormattingOptions,
+  ): EditResult;
+  /**
+   * Options used by {@linkcode modify} when computing the modification edit operations
+   */
+  export type ModificationOptions = {
+    /**
+     * Formatting options.
+     */
+    formattingOptions: FormattingOptions,
+    /**
+     * Optional function to define the insertion index given an existing list of properties.
+     */
+    getInsertionIndex?: (properties: string[]) => number,
+  };
+  /**
+   * Computes the edit operations needed to modify a value in the JSON document.
+   *
+   * @param documentText The input text
+   * @param path The path of the value to change. The path represents either to the document root, a property or an array item.
+   * If the path points to an non-existing property or item, it will be created.
+   * @param value The new value for the specified property or item. If the value is undefined,
+   * the property or item will be removed.
+   * @param options Options
+   * @returns The edit operations describing the changes to the original document, following the format described in {@linkcode EditResult}.
+   * To apply the edit operations to the input, use {@linkcode applyEdits}.
+   */
+  declare export function modify(
+    text: string,
+    path: JSONPath,
+    value: any,
+    options: ModificationOptions,
+  ): EditResult;
+  /**
+   * Applies edits to an input string.
+   * @param text The input text
+   * @param edits Edit operations following the format described in {@linkcode EditResult}.
+   * @returns The text with the applied edits.
+   * @throws An error if the edit operations are not well-formed as described in {@linkcode EditResult}.
+   */
+  declare export function applyEdits(text: string, edits: EditResult): string;
+}

flow-typed/npm/node-fetch_v2.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 // Modified from flow-typed repo:

flow-typed/npm/open_v7.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'open' {

flow-typed/npm/pretty-format_v29.x.x.js

@@ -3,7 +3,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 declare type Print = (value: mixed) => string;
 declare type Indent = (value: string) => string;

flow-typed/npm/selfsigned_v2.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict-local
  * @format
- * @oncall react_native
  */
 
 declare module 'selfsigned' {

flow-typed/npm/serve-static_v1.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'serve-static' {

flow-typed/npm/signedsource_v1.x.x.js

@@ -1,8 +1,8 @@
 /**
  * (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
  *
- * @format
  * @flow strict
+ * @format
  */
 
 declare module 'signedsource' {

flow-typed/npm/tinybench_v4.1.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict
  * @format
- * @oncall react_native
  */
 
 declare module 'tinybench' {
@@ -92,7 +91,19 @@ declare module 'tinybench' {
     beforeEach?: (this: Task) => void | Promise<void>,
   };
 
-  export type Fn = () => Promise<mixed> | mixed;
+  // This is defined as an interface in tinybench but we define it as an object
+  // to catch problems like `overriddenDuration` being misspelled.
+  export type FnReturnedObject = {
+    overriddenDuration?: number,
+  };
+
+  // This type is defined as returning `unknown` instead of `void` in tinybench,
+  // but we type it this way to avoid mistakes (we can make breaking changes
+  // in our definition that they can't).
+  export type Fn = () =>
+    | Promise<void | FnReturnedObject>
+    | void
+    | FnReturnedObject;
 
   declare export class Bench extends EventTarget {
     concurrency: null | 'task' | 'bench';

flow-typed/npm/typescript_v5.x.x.js

@@ -48,6 +48,11 @@ declare module 'typescript' {
       file: SourceFile,
       start?: number,
     ): $ReadOnly<{line: number, character: number}>,
+    convertCompilerOptionsFromJson(
+      jsonOptions: any,
+      basePath: string,
+      configFileName?: string,
+    ): {options: Object, errors: Diagnostic[]},
     ModuleResolutionKind: typeof ModuleResolutionKind,
     ...
   };

flow-typed/npm/undici_v5.x.x.js

@@ -6,7 +6,6 @@
  *
  * @flow strict-local
  * @format
- * @oncall react_native
  */
 
 // Very incomplete types for the undici package.