Release 0.82.1

#publish-packages-to-npm&latest
fixed cp command to work with gnu coreutils (#54063 )
2025-11-01 09:14:26 +00:00 · 2025-10-20 16:32:45 +00:00 · 2025-10-20 15:07:16 +01:00 · 2025-10-20 15:06:57 +01:00 · 2025-10-08 00:25:58 +00:00 · 2025-10-07 22:17:26 +00:00
191 changed files with 6062 additions and 933 deletions
@@ -188,6 +188,7 @@ 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 +209,11 @@ 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 +241,7 @@ 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 +262,11 @@ 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 () => {
@@ -101,7 +101,11 @@ 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) {
@@ -124,7 +128,8 @@ async function createDraftRelease(version, latest, token) {
    latest,
    token,
  );
-  log(`Created draft release: ${release}`);
+  log(`Created draft release: ${release.html_url}, ID ${release.id}`);
+  return release;
 }

 module.exports = {
@@ -10,6 +10,7 @@ jobs:
      - name: Checkout
        uses: actions/checkout@v4
        with:
+          token: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
          fetch-depth: 0
          fetch-tags: true
      - name: Install dependencies
@@ -21,9 +21,24 @@ jobs:
          git config --local user.name "React Native Bot"
      - name: Create draft release
        uses: actions/github-script@v6
+        id: create-draft-release
        with:
          script: |
            const {createDraftRelease} = require('./.github/workflow-scripts/createDraftRelease.js');
            const version = '${{ github.ref_name }}';
            const {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}}')).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,
+            });
@@ -10,6 +10,7 @@ jobs:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
+          token: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
          fetch-depth: 0
          fetch-tags: true
      - name: Install dependencies
@@ -22,6 +23,7 @@ jobs:
      - name: Generate Changelog
        uses: actions/github-script@v6
        with:
+          github-token: ${{ secrets.REACT_NATIVE_BOT_GITHUB_TOKEN }}
          script: |
            const {generateChangelog} = require('./.github/workflow-scripts/generateChangelog');
            const version = '${{ github.ref_name }}';
@@ -273,7 +273,8 @@ jobs:
          NEW_ARCH_ENABLED=1

          export RCT_USE_LOCAL_RN_DEP=/tmp/third-party/ReactNativeDependencies${{ matrix.flavor }}.xcframework.tar.gz
-          export RCT_TESTONLY_RNCORE_TARBALL_PATH="/tmp/ReactCore/ReactCore${{ matrix.flavor }}.xcframework.tar.gz"
+          # 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${{ matrix.flavor }}.xcframework.tar.gz"
          HERMES_ENGINE_TARBALL_PATH=$HERMES_PATH RCT_NEW_ARCH_ENABLED=$NEW_ARCH_ENABLED bundle exec pod install

          xcodebuild \
@@ -379,7 +380,8 @@ jobs:
    runs-on: 8-core-ubuntu
    needs: [set_release_type]
    container:
-      image: reactnativecommunity/react-native-android:latest
+      # Version is pinned to v18.0 to unblock `run_fantom_tests` - see https://github.com/react-native-community/docker-android/pull/242#issuecomment-3280029122
+      image: reactnativecommunity/react-native-android:v18.0
      env:
        TERM: "dumb"
        GRADLE_OPTS: "-Dorg.gradle.daemon=false"
@@ -0,0 +1,48 @@
+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
+    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();
@@ -135,6 +135,7 @@ if (project.findProperty("react.internal.useHermesNightly")?.toString()?.toBoole
    configurations.all {
      resolutionStrategy.dependencySubstitution {
        substitute(project(":packages:react-native:ReactAndroid:hermes-engine"))
+            // TODO: T237406039 update coordinates
            .using(module("com.facebook.react:hermes-android:0.+"))
            .because("Users opted to use hermes from nightly")
      }
@@ -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;
+}
@@ -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};
+}
@@ -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;
+}
@@ -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;
+}
@@ -12,3 +12,6 @@ reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
 # Controls whether to use Hermes from nightly builds. This will speed up builds
 # but should NOT be turned on for CI or release builds.
 react.internal.useHermesNightly=false
+
+# Controls whether to use Hermes 1.0. Clean and rebuild when changing.
+hermesV1Enabled=false
@@ -54,13 +54,16 @@
    "@babel/preset-env": "^7.25.3",
    "@babel/preset-flow": "^7.24.7",
    "@electron/packager": "^18.3.6",
+    "@expo/spawn-async": "^1.7.2",
    "@jest/create-cache-key-function": "^29.7.0",
    "@microsoft/api-extractor": "^7.52.2",
-    "@react-native/metro-babel-transformer": "0.82.0-main",
-    "@react-native/metro-config": "0.82.0-main",
+    "@octokit/rest": "^22.0.0",
+    "@react-native/metro-babel-transformer": "0.82.1",
+    "@react-native/metro-config": "0.82.1",
    "@tsconfig/node22": "22.0.2",
    "@types/react": "^19.1.0",
    "@typescript-eslint/parser": "^8.36.0",
+    "ansi-regex": "^5.0.0",
    "ansi-styles": "^4.2.1",
    "babel-plugin-minify-dead-code-elimination": "^0.5.2",
    "babel-plugin-syntax-hermes-parser": "0.32.0",
@@ -81,6 +84,7 @@
    "eslint-plugin-react-native": "^4.0.0",
    "eslint-plugin-redundant-undefined": "^0.4.0",
    "eslint-plugin-relay": "^1.8.3",
+    "fb-dotslash": "0.5.8",
    "flow-api-translator": "0.32.0",
    "flow-bin": "^0.280.0",
    "glob": "^7.1.1",
@@ -93,6 +97,7 @@
    "jest-diff": "^29.7.0",
    "jest-junit": "^16.0.0",
    "jest-snapshot": "^29.7.0",
+    "jsonc-parser": "2.2.1",
    "markdownlint-cli2": "^0.17.2",
    "markdownlint-rule-relative-links": "^3.0.0",
    "memfs": "^4.7.7",
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/assets-registry",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Asset support code for React Native.",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/babel-plugin-codegen",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Babel plugin to generate native module and view manager code for React Native.",
  "license": "MIT",
  "repository": {
@@ -26,7 +26,7 @@
  ],
  "dependencies": {
    "@babel/traverse": "^7.25.3",
-    "@react-native/codegen": "0.82.0-main"
+    "@react-native/codegen": "0.82.1"
  },
  "devDependencies": {
    "@babel/core": "^7.25.2"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/community-cli-plugin",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Core CLI commands for React Native",
  "keywords": [
    "react-native",
@@ -22,7 +22,7 @@
    "dist"
  ],
  "dependencies": {
-    "@react-native/dev-middleware": "0.82.0-main",
+    "@react-native/dev-middleware": "0.82.1",
    "debug": "^4.4.0",
    "invariant": "^2.2.4",
    "metro": "^0.83.1",
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/core-cli-utils",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "React Native CLI library for Frameworks to build on",
  "license": "MIT",
  "main": "./src/index.flow.js",
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/debugger-frontend",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Debugger frontend for React Native based on Chrome DevTools",
  "keywords": [
    "react-native",
@@ -1,6 +1,6 @@
 #!/usr/bin/env dotslash

-// @generated SignedSource<<e93d55b5e28943e44271f5d3738083e0>>
+// @generated SignedSource<<ea146009f0eb66caf2e1e8c6ad9a664b>>


 {
@@ -11,6 +11,9 @@
            "hash": "sha256",
            "digest": "4352f1c9848ca919101ec628bd08b87a72a828d1ab55fa43a02098329fa452fa",
            "providers": [
+                {
+                    "url": "https://github.com/facebook/react-native/releases/download/v0.82.1/React.Native.DevTools-linux-aarch64.tar.gz"
+                },
                {
                    "type": "http",
                    "url": "https://scontent.xx.fbcdn.net/mci_ab/uap/?ab_b=m&ab_page=react_native_devtools_binaries&ab_entry=AQM24LW0nPZRk0ypuIG9prz_72YjBJNcVlGSIEpO4zdlLXgw4dFNodH7MKg9eKNTnx7wrVDDBNACrnEPt_OfXOjZyZsV9Oaqu0-vNFRdlEyis4YqmpqGLtz3LvD-9R6fzcWxJI9zrhdPvOvlXP-3Syt1UNITaxXDVqIwAAYpCaAh0oLpupAFCc2yvYw"
@@ -24,6 +27,9 @@
            "hash": "sha256",
            "digest": "11c7b07942928a6301b07fbf2bc77ce1229b2a52891f23541cdd9858b5250e64",
            "providers": [
+                {
+                    "url": "https://github.com/facebook/react-native/releases/download/v0.82.1/React.Native.DevTools-linux-x86_64.tar.gz"
+                },
                {
                    "type": "http",
                    "url": "https://scontent.xx.fbcdn.net/mci_ab/uap/?ab_b=m&ab_page=react_native_devtools_binaries&ab_entry=AQNDwm7HZRhtNxHqMr1FfSb0afHFGrn1OHxH0gOiggrLrht9QRUgJ3GG5jj7huhQzMRogE-LCMsnxh1ioOZks-YYX4KRt6Kj1-whdWsGFc7lBhPOpk1ssbYFGN1NNyuyFRmH-3nCY3lBC4AmbCUkbDTUeCi9DidCtJeyc73CZJEu7M62rIzxR2yV"
@@ -37,6 +43,9 @@
            "hash": "sha256",
            "digest": "3cbe8b1b3d17e433347f1601435bb9a6cb758528a5c176a66fc52d9977223175",
            "providers": [
+                {
+                    "url": "https://github.com/facebook/react-native/releases/download/v0.82.1/React.Native.DevTools-macos-aarch64.tar.gz"
+                },
                {
                    "type": "http",
                    "url": "https://scontent.xx.fbcdn.net/mci_ab/uap/?ab_b=m&ab_page=react_native_devtools_binaries&ab_entry=AQOmC2cqqSv4OrSJKJroYVg_NE8OE4O73AXqY7wXiYqiWQVkDt0Xnyw3ZeUpQT_Qb0-OoT5F8REKoFrB6eqwat8Ovkyina30peYTTwNUzmwnnGQEg7J0fOHNxLF4dkmU1FagXtsoWgex4dKgsK_VpcMsHj3Vp7diomkYvWBVTf_gPVEseYSN9oKq92qa"
@@ -50,6 +59,9 @@
            "hash": "sha256",
            "digest": "6fb79bc2ba3008401b4c9c128248657b95b98581ccde60f8fadb622163779775",
            "providers": [
+                {
+                    "url": "https://github.com/facebook/react-native/releases/download/v0.82.1/React.Native.DevTools-macos-x86_64.tar.gz"
+                },
                {
                    "type": "http",
                    "url": "https://scontent.xx.fbcdn.net/mci_ab/uap/?ab_b=m&ab_page=react_native_devtools_binaries&ab_entry=AQMMtGn-YGdfLfTVWC8zbQkQx65Asq6iArKt1t__cjZ8UY_s6-sX5XBHr8k1SaexAO21dFZENQVZ1jW_wn_gJ9ENvosQDG1KfWMViKsHli0xRzZ1HVsgPIj_KVXe907QZwwtJf2XhgH0HT8dfH-AQdDcd0_TB5DFUwOsHzhH0nBrHet7YFkbJtPTaA"
@@ -63,6 +75,9 @@
            "hash": "sha256",
            "digest": "579a5b0944c51c3b1b541ad5af66c1ffedf93cae2a891ecdf88cb7219fd9b096",
            "providers": [
+                {
+                    "url": "https://github.com/facebook/react-native/releases/download/v0.82.1/React.Native.DevTools-windows-x86_64.tar.gz"
+                },
                {
                    "type": "http",
                    "url": "https://scontent.xx.fbcdn.net/mci_ab/uap/?ab_b=m&ab_page=react_native_devtools_binaries&ab_entry=AQOQ3E8lBXqdVHbDPyVb5AOQMrDWjFrFV8fnLLBsygQvLWdpu6ixyG9PgWdwpi5jM-XcDdCHkhBdhaq-5dwT_tgRWKCAMsEBoAIUk0Xg77mGyHG2VF7bNfQ2qFBMuObrsTmrKy1nJ-UFDDm29pJD4GkFQW5NesiBwndJj8t3B8Ur8cczh_XR8rF5"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/debugger-shell",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Experimental debugger shell for React Native for use with @react-native/debugger-frontend",
  "keywords": [
    "react-native",
@@ -152,11 +152,7 @@ function getShellBinaryAndArgs(
 ): [string, Array<string>] {
  switch (flavor) {
    case 'prebuilt':
-      return [
-        // $FlowFixMe[cannot-resolve-module] fb-dotslash includes Flow types but Flow does not pick them up
-        require('fb-dotslash'),
-        [DEVTOOLS_BINARY_DOTSLASH_FILE],
-      ];
+      return [require('fb-dotslash'), [DEVTOOLS_BINARY_DOTSLASH_FILE]];
    case 'dev':
      return [
        // NOTE: Internally at Meta, this is aliased to a workspace that is
@@ -44,11 +44,11 @@ async function spawnAndGetStderr(
 async function prepareDebuggerShellFromDotSlashFile(
  filePath: string,
 ): Promise<DebuggerShellPreparationResult> {
-  const {code, stderr} = await spawnAndGetStderr(
-    // $FlowFixMe[cannot-resolve-module] fb-dotslash includes Flow types but Flow does not pick them up
-    require('fb-dotslash'),
-    ['--', 'fetch', filePath],
-  );
+  const {code, stderr} = await spawnAndGetStderr(require('fb-dotslash'), [
+    '--',
+    'fetch',
+    filePath,
+  ]);
  if (code === 0) {
    return {code: 'success'};
  }
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/dev-middleware",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Dev server middleware for React Native",
  "keywords": [
    "react-native",
@@ -23,8 +23,8 @@
  ],
  "dependencies": {
    "@isaacs/ttlcache": "^1.4.1",
-    "@react-native/debugger-frontend": "0.82.0-main",
-    "@react-native/debugger-shell": "0.82.0-main",
+    "@react-native/debugger-frontend": "0.82.1",
+    "@react-native/debugger-shell": "0.82.1",
    "chrome-launcher": "^0.15.2",
    "chromium-edge-launcher": "^0.2.0",
    "connect": "^3.6.5",
@@ -39,7 +39,7 @@
    "node": ">= 20.19.4"
  },
  "devDependencies": {
-    "@react-native/debugger-shell": "0.82.0-main",
+    "@react-native/debugger-shell": "0.82.1",
    "selfsigned": "^2.4.1",
    "undici": "^5.29.0",
    "wait-for-expect": "^3.0.2"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/eslint-config",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "ESLint config for React Native",
  "license": "MIT",
  "repository": {
@@ -22,7 +22,7 @@
  "dependencies": {
    "@babel/core": "^7.25.2",
    "@babel/eslint-parser": "^7.25.1",
-    "@react-native/eslint-plugin": "0.82.0-main",
+    "@react-native/eslint-plugin": "0.82.1",
    "@typescript-eslint/eslint-plugin": "^8.36.0",
    "@typescript-eslint/parser": "^8.36.0",
    "eslint-config-prettier": "^8.5.0",
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/eslint-plugin",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "ESLint rules for @react-native/eslint-config",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/eslint-plugin-specs",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "ESLint rules to validate NativeModule and Component Specs",
  "license": "MIT",
  "repository": {
@@ -26,7 +26,7 @@
  "dependencies": {
    "@babel/core": "^7.25.2",
    "@babel/plugin-transform-flow-strip-types": "^7.25.2",
-    "@react-native/codegen": "0.82.0-main",
+    "@react-native/codegen": "0.82.1",
    "make-dir": "^2.1.0",
    "pirates": "^4.0.1",
    "source-map-support": "0.5.0"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/gradle-plugin",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Gradle Plugin for React Native",
  "license": "MIT",
  "repository": {
@@ -28,6 +28,7 @@ import com.facebook.react.utils.DependencyUtils.readVersionAndGroupStrings
 import com.facebook.react.utils.JdkConfiguratorUtils.configureJavaToolChains
 import com.facebook.react.utils.JsonUtils
 import com.facebook.react.utils.NdkConfiguratorUtils.configureReactNativeNdk
+import com.facebook.react.utils.ProjectUtils.isHermesV1Enabled
 import com.facebook.react.utils.ProjectUtils.needsCodegenFromPackageJson
 import com.facebook.react.utils.findPackageJsonFile
 import java.io.File
@@ -54,6 +55,10 @@ class ReactPlugin : Plugin<Project> {
                project,
            )

+    if (project.rootProject.isHermesV1Enabled) {
+      rootExtension.hermesV1Enabled.set(true)
+    }
+
    // App Only Configuration
    project.pluginManager.withPlugin("com.android.application") {
      // We wire the root extension with the values coming from the app (either user populated or
@@ -66,10 +71,12 @@ class ReactPlugin : Plugin<Project> {
      project.afterEvaluate {
        val reactNativeDir = extension.reactNativeDir.get().asFile
        val propertiesFile = File(reactNativeDir, "ReactAndroid/gradle.properties")
-        val versionAndGroupStrings = readVersionAndGroupStrings(propertiesFile)
-        val versionString = versionAndGroupStrings.first
-        val groupString = versionAndGroupStrings.second
-        configureDependencies(project, versionString, groupString)
+        val hermesVersionPropertiesFile =
+            File(reactNativeDir, "sdks/hermes-engine/version.properties")
+        val versionAndGroupStrings =
+            readVersionAndGroupStrings(propertiesFile, hermesVersionPropertiesFile)
+        val hermesV1Enabled = rootExtension.hermesV1Enabled.get()
+        configureDependencies(project, versionAndGroupStrings, hermesV1Enabled)
        configureRepositories(project)
      }

@@ -11,6 +11,7 @@ import javax.inject.Inject
 import org.gradle.api.Project
 import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.provider.ListProperty
+import org.gradle.api.provider.Property

 /**
 * A private extension we set on the rootProject to make easier to share values at execution time
@@ -57,4 +58,6 @@ abstract class PrivateReactExtension @Inject constructor(project: Project) {

  val codegenDir: DirectoryProperty =
      objects.directoryProperty().convention(root.dir("node_modules/@react-native/codegen"))
+
+  val hermesV1Enabled: Property<Boolean> = objects.property(Boolean::class.java).convention(false)
 }
@@ -94,7 +94,12 @@ abstract class BundleHermesCTask : DefaultTask() {
    runCommand(bundleCommand)

    if (hermesEnabled.get()) {
-      val detectedHermesCommand = detectOSAwareHermesCommand(root.get().asFile, hermesCommand.get())
+      val hermesV1Enabled =
+          if (project.rootProject.hasProperty("hermesV1Enabled"))
+              project.rootProject.findProperty("hermesV1Enabled") == "true"
+          else false
+      val detectedHermesCommand =
+          detectOSAwareHermesCommand(root.get().asFile, hermesCommand.get(), hermesV1Enabled)
      val bytecodeFile = File("${bundleFile}.hbc")
      val outputSourceMap = resolveOutputSourceMap(bundleAssetFilename)
      val compilerSourceMap = resolveCompilerSourceMap(bundleAssetFilename)
@@ -7,12 +7,15 @@

 package com.facebook.react.utils

-import com.facebook.react.utils.PropertyUtils.DEFAULT_INTERNAL_PUBLISHING_GROUP
+import com.facebook.react.utils.PropertyUtils.DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP
+import com.facebook.react.utils.PropertyUtils.DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP
 import com.facebook.react.utils.PropertyUtils.EXCLUSIVE_ENTEPRISE_REPOSITORY
 import com.facebook.react.utils.PropertyUtils.INCLUDE_JITPACK_REPOSITORY
 import com.facebook.react.utils.PropertyUtils.INCLUDE_JITPACK_REPOSITORY_DEFAULT
-import com.facebook.react.utils.PropertyUtils.INTERNAL_PUBLISHING_GROUP
+import com.facebook.react.utils.PropertyUtils.INTERNAL_HERMES_PUBLISHING_GROUP
+import com.facebook.react.utils.PropertyUtils.INTERNAL_HERMES_V1_VERSION_NAME
 import com.facebook.react.utils.PropertyUtils.INTERNAL_REACT_NATIVE_MAVEN_LOCAL_REPO
+import com.facebook.react.utils.PropertyUtils.INTERNAL_REACT_PUBLISHING_GROUP
 import com.facebook.react.utils.PropertyUtils.INTERNAL_USE_HERMES_NIGHTLY
 import com.facebook.react.utils.PropertyUtils.INTERNAL_VERSION_NAME
 import com.facebook.react.utils.PropertyUtils.SCOPED_EXCLUSIVE_ENTEPRISE_REPOSITORY
@@ -25,6 +28,14 @@ import org.gradle.api.artifacts.repositories.MavenArtifactRepository

 internal object DependencyUtils {

+  internal data class Coordinates(
+      val versionString: String,
+      val hermesVersionString: String,
+      val hermesV1VersionString: String,
+      val reactGroupString: String = DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP,
+      val hermesGroupString: String = DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP,
+  )
+
  /**
   * This method takes care of configuring the repositories{} block for both the app and all the 3rd
   * party libraries which are auto-linked.
@@ -95,14 +106,20 @@ internal object DependencyUtils {
   * This method takes care of configuring the resolution strategy for both the app and all the 3rd
   * party libraries which are auto-linked. Specifically it takes care of:
   * - Forcing the react-android/hermes-android version to the one specified in the package.json
-   * - Substituting `react-native` with `react-android` and `hermes-engine` with `hermes-android`.
+   * - Substituting `react-native` with `react-android` and `hermes-engine` with `hermes-android`
+   * - Selecting between the classic Hermes and Hermes V1
   */
  fun configureDependencies(
      project: Project,
-      versionString: String,
-      groupString: String = DEFAULT_INTERNAL_PUBLISHING_GROUP,
+      coordinates: Coordinates,
+      hermesV1Enabled: Boolean = false,
  ) {
-    if (versionString.isBlank()) return
+    if (
+        coordinates.versionString.isBlank() ||
+            (!hermesV1Enabled && coordinates.hermesVersionString.isBlank()) ||
+            (hermesV1Enabled && coordinates.hermesV1VersionString.isBlank())
+    )
+        return
    project.rootProject.allprojects { eachProject ->
      eachProject.configurations.all { configuration ->
        // Here we set a dependencySubstitution for both react-native and hermes-engine as those
@@ -110,61 +127,83 @@ internal object DependencyUtils {
        // This allows users to import libraries that are still using
        // implementation("com.facebook.react:react-native:+") and resolve the right dependency.
        configuration.resolutionStrategy.dependencySubstitution {
-          getDependencySubstitutions(versionString, groupString).forEach { (module, dest, reason) ->
+          getDependencySubstitutions(coordinates, hermesV1Enabled).forEach { (module, dest, reason)
+            ->
            it.substitute(it.module(module)).using(it.module(dest)).because(reason)
          }
        }
        configuration.resolutionStrategy.force(
-            "${groupString}:react-android:${versionString}",
+            "${coordinates.reactGroupString}:react-android:${coordinates.versionString}",
        )
        if (!(eachProject.findProperty(INTERNAL_USE_HERMES_NIGHTLY) as? String).toBoolean()) {
          // Contributors only: The hermes-engine version is forced only if the user has
          // not opted into using nightlies for local development.
-          configuration.resolutionStrategy.force("${groupString}:hermes-android:${versionString}")
+          configuration.resolutionStrategy.force(
+              // TODO: T237406039 update coordinates
+              if (hermesV1Enabled)
+                  "${coordinates.hermesGroupString}:hermes-android:${coordinates.hermesV1VersionString}"
+              else
+                  "${coordinates.reactGroupString}:hermes-android:${coordinates.hermesVersionString}"
+          )
        }
      }
    }
  }

  internal fun getDependencySubstitutions(
-      versionString: String,
-      groupString: String = DEFAULT_INTERNAL_PUBLISHING_GROUP,
+      coordinates: Coordinates,
+      hermesV1Enabled: Boolean = false,
  ): List<Triple<String, String, String>> {
+    // TODO: T231755027 update coordinates and versioning
    val dependencySubstitution = mutableListOf<Triple<String, String, String>>()
+    // TODO: T237406039 update coordinates
+    val hermesVersionString =
+        if (hermesV1Enabled)
+            "${coordinates.hermesGroupString}:hermes-android:${coordinates.hermesV1VersionString}"
+        else "${coordinates.reactGroupString}:hermes-android:${coordinates.hermesVersionString}"
    dependencySubstitution.add(
        Triple(
            "com.facebook.react:react-native",
-            "${groupString}:react-android:${versionString}",
+            "${coordinates.reactGroupString}:react-android:${coordinates.versionString}",
            "The react-native artifact was deprecated in favor of react-android due to https://github.com/facebook/react-native/issues/35210.",
        )
    )
    dependencySubstitution.add(
        Triple(
            "com.facebook.react:hermes-engine",
-            "${groupString}:hermes-android:${versionString}",
+            hermesVersionString,
            "The hermes-engine artifact was deprecated in favor of hermes-android due to https://github.com/facebook/react-native/issues/35210.",
        )
    )
-    if (groupString != DEFAULT_INTERNAL_PUBLISHING_GROUP) {
+    if (coordinates.reactGroupString != DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP) {
      dependencySubstitution.add(
          Triple(
              "com.facebook.react:react-android",
-              "${groupString}:react-android:${versionString}",
+              "${coordinates.reactGroupString}:react-android:${coordinates.versionString}",
              "The react-android dependency was modified to use the correct Maven group.",
          )
      )
+      // TODO: T237406039 update coordinates
      dependencySubstitution.add(
          Triple(
              "com.facebook.react:hermes-android",
-              "${groupString}:hermes-android:${versionString}",
+              hermesVersionString,
              "The hermes-android dependency was modified to use the correct Maven group.",
          )
      )
+    } else if (hermesV1Enabled) {
+      dependencySubstitution.add(
+          Triple(
+              "com.facebook.react:hermes-android",
+              hermesVersionString,
+              "The hermes-android dependency was modified to use Hermes V1.",
+          )
+      )
    }
    return dependencySubstitution
  }

-  fun readVersionAndGroupStrings(propertiesFile: File): Pair<String, String> {
+  fun readVersionAndGroupStrings(propertiesFile: File, hermesVersionFile: File): Coordinates {
    val reactAndroidProperties = Properties()
    propertiesFile.inputStream().use { reactAndroidProperties.load(it) }
    val versionStringFromFile = (reactAndroidProperties[INTERNAL_VERSION_NAME] as? String).orEmpty()
@@ -176,10 +215,27 @@ internal object DependencyUtils {
          versionStringFromFile
        }
    // Returns Maven group for repos using different group for Maven artifacts
-    val groupString =
-        reactAndroidProperties[INTERNAL_PUBLISHING_GROUP] as? String
-            ?: DEFAULT_INTERNAL_PUBLISHING_GROUP
-    return Pair(versionString, groupString)
+    val reactGroupString =
+        reactAndroidProperties[INTERNAL_REACT_PUBLISHING_GROUP] as? String
+            ?: DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP
+    val hermesGroupString =
+        reactAndroidProperties[INTERNAL_HERMES_PUBLISHING_GROUP] as? String
+            ?: DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP
+    // TODO: T237406039 read both versions from the same file
+    val hermesVersionProperties = Properties()
+    hermesVersionFile.inputStream().use { hermesVersionProperties.load(it) }
+
+    val hermesVersion = versionString
+    val hermesV1Version =
+        (hermesVersionProperties[INTERNAL_HERMES_V1_VERSION_NAME] as? String).orEmpty()
+
+    return Coordinates(
+        versionString,
+        hermesVersion,
+        hermesV1Version,
+        reactGroupString,
+        hermesGroupString,
+    )
  }

  fun Project.mavenRepoFromUrl(
@@ -122,11 +122,16 @@ private fun detectCliFile(reactNativeRoot: File, preconfiguredCliFile: File?): F
 *    used if the user is building Hermes from source.
 * 3. The file located in `node_modules/react-native/sdks/hermesc/%OS-BIN%/hermesc` where `%OS-BIN%`
 *    is substituted with the correct OS arch. This will be used if the user is using a precompiled
- *    hermes-engine package.
+ *    hermes-engine package. Or, if the user has opted in to use Hermes V1, the used file will be
+ *    located in `node_modules/hermes-compiler/%OS-BIN%/hermesc` where `%OS-BIN%` is substituted
+ *    with the correct OS arch.
 * 4. Fails otherwise
 */
-internal fun detectOSAwareHermesCommand(projectRoot: File, hermesCommand: String): String {
-  // 1. If the project specifies a Hermes command, don't second guess it.
+internal fun detectOSAwareHermesCommand(
+    projectRoot: File,
+    hermesCommand: String,
+    hermesV1Enabled: Boolean = false,
+): String { // 1. If the project specifies a Hermes command, don't second guess it.
  if (hermesCommand.isNotBlank()) {
    val osSpecificHermesCommand =
        if ("%OS-BIN%" in hermesCommand) {
@@ -146,9 +151,13 @@ internal fun detectOSAwareHermesCommand(projectRoot: File, hermesCommand: String
    return builtHermesc.cliPath(projectRoot)
  }

-  // 3. If the react-native contains a pre-built hermesc, use it.
+  // 3. If Hermes V1 is enabled, use hermes-compiler from npm, otherwise, if the
+  // react-native contains a pre-built hermesc, use it.
+  // TODO: T237406039 use hermes-compiler from npm for both
+  val hermesCPath = if (hermesV1Enabled) HERMES_COMPILER_NPM_DIR else HERMESC_IN_REACT_NATIVE_DIR
  val prebuiltHermesPath =
-      HERMESC_IN_REACT_NATIVE_DIR.plus(getHermesCBin())
+      hermesCPath
+          .plus(getHermesCBin())
          .replace("%OS-BIN%", getHermesOSBin())
          // Execution on Windows fails with / as separator
          .replace('/', File.separatorChar)
@@ -233,6 +242,7 @@ internal fun readPackageJsonFile(
  return packageJson?.let { JsonUtils.fromPackageJson(it) }
 }

+private const val HERMES_COMPILER_NPM_DIR = "node_modules/hermes-compiler/hermesc/%OS-BIN%/"
 private const val HERMESC_IN_REACT_NATIVE_DIR = "node_modules/react-native/sdks/hermesc/%OS-BIN%/"
 private const val HERMESC_BUILT_FROM_SOURCE_DIR =
    "node_modules/react-native/ReactAndroid/hermes-engine/build/hermes/bin/"
@@ -13,14 +13,17 @@ import com.facebook.react.utils.KotlinStdlibCompatUtils.lowercaseCompat
 import com.facebook.react.utils.KotlinStdlibCompatUtils.toBooleanStrictOrNullCompat
 import com.facebook.react.utils.PropertyUtils.EDGE_TO_EDGE_ENABLED
 import com.facebook.react.utils.PropertyUtils.HERMES_ENABLED
+import com.facebook.react.utils.PropertyUtils.HERMES_V1_ENABLED
 import com.facebook.react.utils.PropertyUtils.REACT_NATIVE_ARCHITECTURES
 import com.facebook.react.utils.PropertyUtils.SCOPED_EDGE_TO_EDGE_ENABLED
 import com.facebook.react.utils.PropertyUtils.SCOPED_HERMES_ENABLED
+import com.facebook.react.utils.PropertyUtils.SCOPED_HERMES_V1_ENABLED
 import com.facebook.react.utils.PropertyUtils.SCOPED_REACT_NATIVE_ARCHITECTURES
 import com.facebook.react.utils.PropertyUtils.SCOPED_USE_THIRD_PARTY_JSC
 import com.facebook.react.utils.PropertyUtils.USE_THIRD_PARTY_JSC
 import org.gradle.api.Project
 import org.gradle.api.file.DirectoryProperty
+import org.jetbrains.kotlin.gradle.plugin.extraProperties

 internal object ProjectUtils {

@@ -68,6 +71,17 @@ internal object ProjectUtils {
            (project.hasProperty(SCOPED_USE_THIRD_PARTY_JSC) &&
                project.property(SCOPED_USE_THIRD_PARTY_JSC).toString().toBoolean())

+  internal val Project.isHermesV1Enabled: Boolean
+    get() =
+        (project.hasProperty(HERMES_V1_ENABLED) &&
+            project.property(HERMES_V1_ENABLED).toString().toBoolean()) ||
+            (project.hasProperty(SCOPED_HERMES_V1_ENABLED) &&
+                project.property(SCOPED_HERMES_V1_ENABLED).toString().toBoolean()) ||
+            (project.extraProperties.has(HERMES_V1_ENABLED) &&
+                project.extraProperties.get(HERMES_V1_ENABLED).toString().toBoolean()) ||
+            (project.extraProperties.has(SCOPED_HERMES_V1_ENABLED) &&
+                project.extraProperties.get(SCOPED_HERMES_V1_ENABLED).toString().toBoolean())
+
  internal fun Project.needsCodegenFromPackageJson(rootProperty: DirectoryProperty): Boolean {
    val parsedPackageJson = readPackageJsonFile(this, rootProperty)
    return needsCodegenFromPackageJson(parsedPackageJson)
@@ -18,6 +18,10 @@ object PropertyUtils {
  const val HERMES_ENABLED = "hermesEnabled"
  const val SCOPED_HERMES_ENABLED = "react.hermesEnabled"

+  /** Public property that toggles Hermes V1 */
+  const val HERMES_V1_ENABLED = "hermesV1Enabled"
+  const val SCOPED_HERMES_V1_ENABLED = "react.hermesV1Enabled"
+
  /** Public property that toggles edge-to-edge */
  const val EDGE_TO_EDGE_ENABLED = "edgeToEdgeEnabled"
  const val SCOPED_EDGE_TO_EDGE_ENABLED = "react.edgeToEdgeEnabled"
@@ -68,9 +72,17 @@ object PropertyUtils {
  const val INTERNAL_USE_HERMES_NIGHTLY = "react.internal.useHermesNightly"

  /** Internal property used to override the publishing group for the React Native artifacts. */
-  const val INTERNAL_PUBLISHING_GROUP = "react.internal.publishingGroup"
-  const val DEFAULT_INTERNAL_PUBLISHING_GROUP = "com.facebook.react"
+  const val INTERNAL_REACT_PUBLISHING_GROUP = "react.internal.publishingGroup"
+  const val INTERNAL_HERMES_PUBLISHING_GROUP = "react.internal.hermesPublishingGroup"
+  const val DEFAULT_INTERNAL_REACT_PUBLISHING_GROUP = "com.facebook.react"
+  const val DEFAULT_INTERNAL_HERMES_PUBLISHING_GROUP = "com.facebook.hermes"

  /** Internal property used to control the version name of React Native */
  const val INTERNAL_VERSION_NAME = "VERSION_NAME"
+
+  /**
+   * Internal property, shared with iOS, used to control the version name of Hermes Engine. This is
+   * stored in sdks/hermes-engine/version.properties
+   */
+  const val INTERNAL_HERMES_V1_VERSION_NAME = "HERMES_V1_VERSION_NAME"
 }
@@ -275,71 +275,160 @@ class DependencyUtilsTest {
  fun configureDependencies_withEmptyVersion_doesNothing() {
    val project = createProject()

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

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

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

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

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

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

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

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

  @Test
-  fun configureDependencies_withVersionStringAndGroupString_appliesOnAllProjects() {
+  fun configureDependencies_withVersionString_appliesOnAllProjects_withHermesV1() {
    val rootProject = ProjectBuilder.builder().build()
    val appProject = ProjectBuilder.builder().withName("app").withParent(rootProject).build()
    val libProject = ProjectBuilder.builder().withName("lib").withParent(rootProject).build()
    appProject.plugins.apply("com.android.application")
    libProject.plugins.apply("com.android.library")

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

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

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

    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
    assertThat("com.facebook.react:react-android:0.42.0")
@@ -358,8 +447,41 @@ class DependencyUtilsTest {
  }

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

    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
    assertThat("io.github.test:react-android:0.42.0").isEqualTo(dependencySubstitutions[0].second)
@@ -383,6 +505,44 @@ class DependencyUtilsTest {
        .isEqualTo(dependencySubstitutions[3].third)
  }

+  @Test
+  fun getDependencySubstitutions_withCustomGroup_substitutesCorrectly_withHermesV1() {
+    val dependencySubstitutions =
+        getDependencySubstitutions(
+            DependencyUtils.Coordinates(
+                "0.42.0",
+                "0.42.0",
+                "0.43.0",
+                "io.github.test",
+                "io.github.test.hermes",
+            ),
+            hermesV1Enabled = true,
+        )
+
+    assertThat("com.facebook.react:react-native").isEqualTo(dependencySubstitutions[0].first)
+    assertThat("io.github.test:react-android:0.42.0").isEqualTo(dependencySubstitutions[0].second)
+    assertThat(
+            "The react-native artifact was deprecated in favor of react-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[0].third)
+    assertThat("com.facebook.react:hermes-engine").isEqualTo(dependencySubstitutions[1].first)
+    assertThat("io.github.test.hermes:hermes-android:0.43.0")
+        .isEqualTo(dependencySubstitutions[1].second)
+    assertThat(
+            "The hermes-engine artifact was deprecated in favor of hermes-android due to https://github.com/facebook/react-native/issues/35210."
+        )
+        .isEqualTo(dependencySubstitutions[1].third)
+    assertThat("com.facebook.react:react-android").isEqualTo(dependencySubstitutions[2].first)
+    assertThat("io.github.test:react-android:0.42.0").isEqualTo(dependencySubstitutions[2].second)
+    assertThat("The react-android dependency was modified to use the correct Maven group.")
+        .isEqualTo(dependencySubstitutions[2].third)
+    assertThat("com.facebook.react:hermes-android").isEqualTo(dependencySubstitutions[3].first)
+    assertThat("io.github.test.hermes:hermes-android:0.43.0")
+        .isEqualTo(dependencySubstitutions[3].second)
+    assertThat("The hermes-android dependency was modified to use the correct Maven group.")
+        .isEqualTo(dependencySubstitutions[3].third)
+  }
+
  @Test
  fun readVersionString_withCorrectVersionString_returnsIt() {
    val propertiesFile =
@@ -396,9 +556,25 @@ class DependencyUtilsTest {
          )
        }

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

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

  @Test
@@ -408,15 +584,33 @@ class DependencyUtilsTest {
          writeText(
              """
        VERSION_NAME=0.0.0-20221101-2019-cfe811ab1
+        HERMES_VERSION_NAME=0.12.0-commitly-20221101-2019-cfe811ab1
+        HERMES_V1_VERSION_NAME=250829098.0.0-stable
        ANOTHER_PROPERTY=true
      """
                  .trimIndent()
          )
        }

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

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

  @Test
@@ -431,8 +625,23 @@ class DependencyUtilsTest {
          )
        }

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

  @Test
@@ -448,8 +657,24 @@ class DependencyUtilsTest {
          )
        }

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

  @Test
@@ -459,15 +684,30 @@ class DependencyUtilsTest {
          writeText(
              """
        react.internal.publishingGroup=io.github.test
+        react.internal.hermesPublishingGroup=io.github.test
        ANOTHER_PROPERTY=true
      """
                  .trimIndent()
          )
        }

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

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

  @Test
@@ -482,9 +722,23 @@ class DependencyUtilsTest {
          )
        }

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

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

  @Test
@@ -162,6 +162,16 @@ class PathUtilsTest {
    assertThat(detectOSAwareHermesCommand(tempFolder.root, "")).isEqualTo(expected.toString())
  }

+  @Test
+  @WithOs(OS.MAC)
+  fun detectOSAwareHermesCommand_withHermesV1Enabled() {
+    tempFolder.newFolder("node_modules/hermes-compiler/hermesc/osx-bin/")
+    val expected = tempFolder.newFile("node_modules/hermes-compiler/hermesc/osx-bin/hermesc")
+
+    assertThat(detectOSAwareHermesCommand(tempFolder.root, "", hermesV1Enabled = true))
+        .isEqualTo(expected.toString())
+  }
+
  @Test(expected = IllegalStateException::class)
  @WithOs(OS.MAC)
  fun detectOSAwareHermesCommand_failsIfNotFound() {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/metro-config",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Metro configuration for React Native.",
  "license": "MIT",
  "repository": {
@@ -26,8 +26,8 @@
    "dist"
  ],
  "dependencies": {
-    "@react-native/js-polyfills": "0.82.0-main",
-    "@react-native/metro-babel-transformer": "0.82.0-main",
+    "@react-native/js-polyfills": "0.82.1",
+    "@react-native/metro-babel-transformer": "0.82.1",
    "metro-config": "^0.83.1",
    "metro-runtime": "^0.83.1"
  }
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/new-app-screen",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "NewAppScreen component for React Native",
  "keywords": [
    "react-native"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/normalize-colors",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Color normalization for React Native.",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/js-polyfills",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Polyfills for React Native.",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/babel-preset",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Babel preset for React Native applications",
  "repository": {
    "type": "git",
@@ -66,7 +66,7 @@
    "@babel/plugin-transform-typescript": "^7.25.2",
    "@babel/plugin-transform-unicode-regex": "^7.24.7",
    "@babel/template": "^7.25.0",
-    "@react-native/babel-plugin-codegen": "0.82.0-main",
+    "@react-native/babel-plugin-codegen": "0.82.1",
    "babel-plugin-syntax-hermes-parser": "0.32.0",
    "babel-plugin-transform-flow-enums": "^0.0.2",
    "react-refresh": "^0.14.0"
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/metro-babel-transformer",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Babel transformer for React Native applications.",
  "repository": {
    "type": "git",
@@ -27,7 +27,7 @@
  ],
  "dependencies": {
    "@babel/core": "^7.25.2",
-    "@react-native/babel-preset": "0.82.0-main",
+    "@react-native/babel-preset": "0.82.1",
    "hermes-parser": "0.32.0",
    "nullthrows": "^1.1.1"
  },
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/codegen",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Code generation tools for React Native",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/compatibility-check",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "Check a React Native app's boundary between JS and Native for incompatibilities",
  "license": "MIT",
  "repository": {
@@ -29,7 +29,7 @@
    "dist"
  ],
  "dependencies": {
-    "@react-native/codegen": "0.82.0-main"
+    "@react-native/codegen": "0.82.1"
  },
  "devDependencies": {
    "flow-remove-types": "^2.237.2",
@@ -1,6 +1,6 @@
 {
  "name": "@react-native/popup-menu-android",
-  "version": "0.82.0-main",
+  "version": "0.82.1",
  "description": "PopupMenu for the Android platform",
  "main": "index.js",
  "files": [
@@ -21,7 +21,7 @@
  },
  "license": "MIT",
  "devDependencies": {
-    "@react-native/codegen": "0.82.0-main"
+    "@react-native/codegen": "0.82.1"
  },
  "peerDependencies": {
    "@types/react": "^19.1.0",
@@ -873,56 +873,6 @@ describe('Animated', () => {
    });
  });

-  describe('Animated Interactions', () => {
-    let Animated; // eslint-disable-line no-shadow
-    let InteractionManager;
-
-    beforeEach(() => {
-      jest.mock('../../Interaction/InteractionManager');
-      Animated = require('../Animated').default;
-      InteractionManager =
-        require('../../Interaction/InteractionManager').default;
-    });
-
-    afterEach(() => {
-      jest.unmock('../../Interaction/InteractionManager');
-    });
-
-    it('registers an interaction by default', () => {
-      // $FlowFixMe[prop-missing]
-      InteractionManager.createInteractionHandle.mockReturnValue(777);
-
-      const value = new Animated.Value(0);
-      const callback = jest.fn();
-      Animated.timing(value, {
-        toValue: 100,
-        duration: 100,
-        useNativeDriver: false,
-      }).start(callback);
-      jest.runAllTimers();
-
-      expect(InteractionManager.createInteractionHandle).toBeCalled();
-      expect(InteractionManager.clearInteractionHandle).toBeCalledWith(777);
-      expect(callback).toBeCalledWith({finished: true});
-    });
-
-    it('does not register an interaction when specified', () => {
-      const value = new Animated.Value(0);
-      const callback = jest.fn();
-      Animated.timing(value, {
-        toValue: 100,
-        duration: 100,
-        isInteraction: false,
-        useNativeDriver: false,
-      }).start(callback);
-      jest.runAllTimers();
-
-      expect(InteractionManager.createInteractionHandle).not.toBeCalled();
-      expect(InteractionManager.clearInteractionHandle).not.toBeCalled();
-      expect(callback).toBeCalledWith({finished: true});
-    });
-  });
-
  describe('Animated Tracking', () => {
    it('should track values', () => {
      const value1 = new Animated.Value(0);
@@ -18,7 +18,6 @@ import type {AnimatedNodeConfig} from './AnimatedNode';
 import type AnimatedTracking from './AnimatedTracking';

 import NativeAnimatedHelper from '../../../src/private/animated/NativeAnimatedHelper';
-import InteractionManager from '../../Interaction/InteractionManager';
 import AnimatedInterpolation from './AnimatedInterpolation';
 import AnimatedWithChildren from './AnimatedWithChildren';

@@ -312,10 +311,6 @@ export default class AnimatedValue extends AnimatedWithChildren {
   * See https://reactnative.dev/docs/animatedvalue#animate
   */
  animate(animation: Animation, callback: ?EndCallback): void {
-    let handle = null;
-    if (animation.__isInteraction) {
-      handle = InteractionManager.createInteractionHandle();
-    }
    const previousAnimation = this._animation;
    this._animation && this._animation.stop();
    this._animation = animation;
@@ -328,9 +323,6 @@ export default class AnimatedValue extends AnimatedWithChildren {
      },
      result => {
        this._animation = null;
-        if (handle !== null) {
-          InteractionManager.clearInteractionHandle(handle);
-        }
        callback && callback(result);
      },
      previousAnimation,
@@ -6,6 +6,7 @@
 *
 * @flow strict
 * @format
+ * @deprecated
 */

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

 'use strict';
@@ -264,7 +264,7 @@ const Switch: component(
      disabled,
      onTintColor: trackColorForTrue,
      style: StyleSheet.compose(
-        {height: 31, width: 51},
+        {alignSelf: 'flex-start' as const},
        StyleSheet.compose(
          style,
          ios_backgroundColor == null
@@ -26,9 +26,9 @@
 * ```
 */
 export default class ReactNativeVersion {
-  static major: number = 1000;
-  static minor: number = 0;
-  static patch: number = 0;
+  static major: number = 0;
+  static minor: number = 82;
+  static patch: number = 1;
  static prerelease: string | null = null;

  static getVersionString(): string {
@@ -6,6 +6,7 @@
 *
 * @flow
 * @format
+ * @deprecated
 */

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

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

 'use strict';
@@ -4,19 +4,17 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @flow strict
+ * @flow strict-local
 * @format
 */

+import setUpPerformanceModern from '../../src/private/setup/setUpPerformanceModern';
 import NativePerformance from '../../src/private/webapis/performance/specs/NativePerformance';

 // In case if the native implementation of the Performance API is available, use it,
 // otherwise fall back to the legacy/default one, which only defines 'Performance.now()'
 if (NativePerformance) {
-  const Performance =
-    require('../../src/private/webapis/performance/Performance').default;
-  // $FlowExpectedError[cannot-write]
-  global.performance = new Performance();
+  setUpPerformanceModern();
 } else {
  if (!global.performance) {
    // $FlowExpectedError[cannot-write]
@@ -12,7 +12,6 @@

 import type {GestureResponderEvent} from '../Types/CoreEventTypes';

-const InteractionManager = require('./InteractionManager').default;
 const TouchHistoryMath = require('./TouchHistoryMath').default;

 const currentCentroidXOfTouchesChangedAfter =
@@ -31,9 +30,6 @@ const currentCentroidY = TouchHistoryMath.currentCentroidY;
 * single-touch gestures resilient to extra touches, and can be used to
 * recognize simple multi-touch gestures.
 *
- * By default, `PanResponder` holds an `InteractionManager` handle to block
- * long-running JS events from interrupting active gestures.
- *
 * It provides a predictable wrapper of the responder handlers provided by the
 * [gesture responder system](docs/gesture-responder-system.html).
 * For each handler, it provides a new `gestureState` object alongside the
@@ -405,9 +401,6 @@ const PanResponder = {
    getInteractionHandle: () => ?number,
    panHandlers: GestureResponderHandlerMethods,
  } {
-    const interactionState = {
-      handle: (null: ?number),
-    };
    const gestureState: PanResponderGestureState = {
      // Useful for debugging
      stateID: Math.random(),
@@ -464,10 +457,6 @@ const PanResponder = {
      },

      onResponderGrant(event: GestureResponderEvent): boolean {
-        if (!interactionState.handle) {
-          interactionState.handle =
-            InteractionManager.createInteractionHandle();
-        }
        gestureState.x0 = currentCentroidX(event.touchHistory);
        gestureState.y0 = currentCentroidY(event.touchHistory);
        gestureState.dx = 0;
@@ -482,21 +471,11 @@ const PanResponder = {
      },

      onResponderReject(event: GestureResponderEvent): void {
-        clearInteractionHandle(
-          interactionState,
-          config.onPanResponderReject,
-          event,
-          gestureState,
-        );
+        config.onPanResponderReject?.call(undefined, event, gestureState);
      },

      onResponderRelease(event: GestureResponderEvent): void {
-        clearInteractionHandle(
-          interactionState,
-          config.onPanResponderRelease,
-          event,
-          gestureState,
-        );
+        config.onPanResponderRelease?.call(undefined, event, gestureState);
        PanResponder._initializeGestureState(gestureState);
      },

@@ -529,21 +508,11 @@ const PanResponder = {
      onResponderEnd(event: GestureResponderEvent): void {
        const touchHistory = event.touchHistory;
        gestureState.numberActiveTouches = touchHistory.numberActiveTouches;
-        clearInteractionHandle(
-          interactionState,
-          config.onPanResponderEnd,
-          event,
-          gestureState,
-        );
+        config.onPanResponderEnd?.call(undefined, event, gestureState);
      },

      onResponderTerminate(event: GestureResponderEvent): void {
-        clearInteractionHandle(
-          interactionState,
-          config.onPanResponderTerminate,
-          event,
-          gestureState,
-        );
+        config.onPanResponderTerminate?.call(undefined, event, gestureState);
        PanResponder._initializeGestureState(gestureState);
      },

@@ -556,27 +525,13 @@ const PanResponder = {
    return {
      panHandlers,
      getInteractionHandle(): ?number {
-        return interactionState.handle;
+        // TODO: Deprecate and delete this method.
+        return null;
      },
    };
  },
 };

-function clearInteractionHandle(
-  interactionState: {handle: ?number, ...},
-  callback: ?(ActiveCallback | PassiveCallback),
-  event: GestureResponderEvent,
-  gestureState: PanResponderGestureState,
-) {
-  if (interactionState.handle) {
-    InteractionManager.clearInteractionHandle(interactionState.handle);
-    interactionState.handle = null;
-  }
-  if (callback) {
-    callback(event, gestureState);
-  }
-}
-
 export type PanResponderInstance = ReturnType<(typeof PanResponder)['create']>;

 export default PanResponder;
@@ -304,6 +304,13 @@ let reactIdleCallbacksNativeModule = RNTarget(
  dependencies: [.reactNativeDependencies, .reactDebug, .reactFeatureFlags, .reactUtils, .reactPerfLogger, .reactCxxReact, .reactTurboModuleCore]
 )

+/// React-webperformance.podspec
+let reactWebPerformanceNativeModule = RNTarget(
+  name: .reactWebPerformanceNativeModule,
+  path: "ReactCommon/react/nativemodule/webperformance",
+  dependencies: [.reactNativeDependencies, .reactCxxReact, .reactTurboModuleCore, .reactPerformanceTimeline]
+)
+
 /// React-featureflagnativemodule.podspec
 let reactFeatureflagsNativemodule = RNTarget(
  name: .reactFeatureflagsNativemodule,
@@ -590,6 +597,7 @@ let targets = [
  reactTurboModuleCoreDefaults,
  reactTurboModuleCoreMicrotasks,
  reactIdleCallbacksNativeModule,
+  reactWebPerformanceNativeModule,
  reactFeatureflagsNativemodule,
  reactNativeModuleDom,
  reactAppDelegate,
@@ -764,6 +772,7 @@ extension String {
  static let reactTurboModuleCoreDefaults = "ReactCommon/turbomodule/core/defaults"
  static let reactTurboModuleCoreMicrotasks = "ReactCommon/turbomodule/core/microtasks"
  static let reactIdleCallbacksNativeModule = "React-idlecallbacksnativemodule"
+  static let reactWebPerformanceNativeModule = "React-webperformancenativemodule"
  static let reactFeatureflagsNativemodule = "React-featureflagsnativemodule"
  static let reactNativeModuleDom = "React-domnativemodule"
  static let reactAppDelegate = "React-RCTAppDelegate"
@@ -380,6 +380,11 @@ static RCTBridge *RCTCurrentBridgeInstance = nil;
                  moduleProvider:(RCTBridgeModuleListProvider)block
                   launchOptions:(NSDictionary *)launchOptions
 {
+  // Only enabld this assertion in OSS
+#if COCOAPODS
+  [RCTBridge throwIfOnLegacyArch];
+#endif
+
  if (self = [super init]) {
    RCTEnforceNewArchitectureValidation(RCTNotAllowedInBridgeless, self, nil);
    _delegate = delegate;
@@ -393,6 +398,17 @@ static RCTBridge *RCTCurrentBridgeInstance = nil;
  return self;
 }

+// Wrap the exception throwing in a static method to avoid the warning: "The code following the exception will never be
+// executed". This might create build failures internally where we treat warnings as errors.
+ (void)throwIfOnLegacyArch
+{
+  @throw [NSException
+      exceptionWithName:NSInternalInconsistencyException
+                 reason:
+                     @"You are trying to initialize the legacy architecture. This is not supported anymore and will be removed in the next version of React Native. Please use the New Architecture instead."
+               userInfo:nil];
+}
+
 RCT_NOT_IMPLEMENTED(-(instancetype)init)

 - (void)dealloc
@@ -21,9 +21,9 @@ NSDictionary* RCTGetReactNativeVersion(void)
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^(void){
    __rnVersion = @{
-                  RCTVersionMajor: @(1000),
-                  RCTVersionMinor: @(0),
-                  RCTVersionPatch: @(0),
+                  RCTVersionMajor: @(0),
+                  RCTVersionMinor: @(82),
+                  RCTVersionPatch: @(1),
                  RCTVersionPrerelease: [NSNull null],
                  };
  });
@@ -20,7 +20,12 @@
 - (UIWindow *)alertWindow
 {
  if (_alertWindow == nil) {
-    _alertWindow = [[UIWindow alloc] initWithWindowScene:RCTKeyWindow().windowScene];
+    UIWindowScene *scene = RCTKeyWindow().windowScene;
+    if (scene != nil) {
+      _alertWindow = [[UIWindow alloc] initWithWindowScene:scene];
+    } else {
+      _alertWindow = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
+    }

    if (_alertWindow) {
      _alertWindow.rootViewController = [UIViewController new];
@@ -111,6 +111,12 @@ typedef NS_OPTIONS(NSInteger, RNComponentViewUpdateMask) {
 */
 - (void)prepareForRecycle;

+/*
+ * Called for unmounted components that won't be moved to a recycle pool.
+ * Useful for releasing any associated resources.
+ */
+- (void)invalidate;
+
 /*
 * Read the last props used to update the view.
 */
@@ -108,6 +108,7 @@ const NSInteger RCTComponentViewRegistryRecyclePoolMaxSize = 1024;
  auto &recycledViews = _recyclePool[componentHandle];

  if (recycledViews.size() > RCTComponentViewRegistryRecyclePoolMaxSize || !componentViewDescriptor.shouldBeRecycled) {
+    [componentViewDescriptor.view invalidate];
    return;
  }

@@ -37,6 +37,8 @@ NS_ASSUME_NONNULL_BEGIN

 - (void)prepareForRecycle;

+- (void)invalidate;
+
 - (facebook::react::Props::Shared)props;

 - (void)setIsJSResponder:(BOOL)isJSResponder;
@@ -129,6 +129,11 @@ using namespace facebook::react;
  // Default implementation does nothing.
 }

+- (void)invalidate
+{
+  // Default implementation does nothing.
+}
+
 - (facebook::react::Props::Shared)props
 {
  RCTAssert(NO, @"props access should be implemented by RCTViewComponentView.");
@@ -39,6 +39,9 @@ val downloadsDir =
 val thirdPartyNdkDir = File("$buildDir/third-party-ndk")
 val reactNativeRootDir = projectDir.parent

+val hermesV1Enabled =
+    rootProject.extensions.getByType(PrivateReactExtension::class.java).hermesV1Enabled.get()
+
 // We put the publishing version from gradle.properties inside ext. so other
 // subprojects can access it as well.
 extra["publishing_version"] = project.findProperty("VERSION_NAME")?.toString()!!
@@ -565,6 +568,10 @@ android {
            "-DCMAKE_POLICY_DEFAULT_CMP0069=NEW",
        )

+        if (hermesV1Enabled) {
+          arguments("-DHERMES_V1_ENABLED=1")
+        }
+
        targets(
            "reactnative",
            "jsi",
@@ -1,5 +1,6 @@
-VERSION_NAME=1000.0.0
+VERSION_NAME=0.82.1
 react.internal.publishingGroup=com.facebook.react
+react.internal.hermesPublishingGroup=com.facebook.hermes

 android.useAndroidX=true

@@ -5,6 +5,7 @@
 * LICENSE file in the root directory of this source tree.
 */

+import com.facebook.react.internal.PrivateReactExtension
 import com.facebook.react.tasks.internal.*
 import de.undercouch.gradle.tasks.download.Download
 import org.apache.tools.ant.taskdefs.condition.Os
@@ -50,6 +51,8 @@ fun getSDKManagerPath(): String {
  }
 }

+val hermesV1Enabled =
+    rootProject.extensions.getByType(PrivateReactExtension::class.java).hermesV1Enabled.get()
 val reactNativeRootDir = project(":packages:react-native:ReactAndroid").projectDir.parent
 val customDownloadDir = System.getenv("REACT_NATIVE_DOWNLOADS_DIR")
 val downloadsDir =
@@ -79,12 +82,21 @@ val hermesBuildOutputFileTree =
    fileTree(hermesBuildDir.toString())
        .include("**/*.cmake", "**/*.marks", "**/compiler_depends.ts", "**/Makefile", "**/link.txt")

-var hermesVersion = "main"
-val hermesVersionFile = File(reactNativeRootDir, "sdks/.hermesversion")
+val hermesVersionProvider: Provider<String> =
+    providers.provider {
+      var hermesVersion = if (hermesV1Enabled) "250829098.0.0-stable" else "main"
+      val hermesVersionFile =
+          File(
+              reactNativeRootDir,
+              if (hermesV1Enabled) "sdks/.hermesv1version" else "sdks/.hermesversion",
+          )

-if (hermesVersionFile.exists()) {
-  hermesVersion = hermesVersionFile.readText()
-}
+      if (hermesVersionFile.exists()) {
+        hermesVersion = hermesVersionFile.readText()
+      }
+
+      hermesVersion
+    }

 val ndkBuildJobs = Runtime.getRuntime().availableProcessors().toString()
 val prefabHeadersDir = File("$buildDir/prefab-headers")
@@ -95,7 +107,11 @@ val jsiDir = File(reactNativeRootDir, "ReactCommon/jsi")
 val downloadHermesDest = File(downloadsDir, "hermes.tar.gz")
 val downloadHermes by
    tasks.registering(Download::class) {
-      src("https://github.com/facebook/hermes/tarball/${hermesVersion}")
+      src(
+          providers.provider {
+            "https://github.com/facebook/hermes/tarball/${hermesVersionProvider.get()}"
+          }
+      )
      onlyIfModified(true)
      overwrite(true)
      quiet(true)
@@ -151,6 +167,7 @@ val configureBuildForHermes by
              "-B",
              hermesBuildDir.toString(),
              "-DJSI_DIR=" + jsiDir.absolutePath,
+              "-DCMAKE_BUILD_TYPE=Release",
          )
      if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        cmakeCommandLine = cmakeCommandLine + "-GNMake Makefiles"
@@ -295,7 +312,11 @@ android {
          // Therefore we're passing as build type Release, to provide a faster build.
          // This has the (unlucky) side effect of letting AGP call the build
          // tasks `configureCMakeRelease` while is actually building the debug flavor.
-          arguments("-DCMAKE_BUILD_TYPE=Release")
+          arguments(
+              "-DCMAKE_BUILD_TYPE=Release",
+              // For debug builds, explicitly enable the Hermes Debugger.
+              "-DHERMES_ENABLE_DEBUGGER=True",
+          )
        }
      }
    }
@@ -328,6 +328,15 @@ public class ReactInstanceManager {
    }

    registerCxxErrorHandlerFunc();
+
+    // Using `if (true)` just to prevent tests / lint errors.
+    if (true) {
+      // Legacy architecture of React Native is deprecated and can't be initialized anymore.
+      // More details on:
+      // https://github.com/react-native-community/discussions-and-proposals/blob/nc/legacy-arch-removal/proposals/0929-legacy-architecture-removal.md
+      throw new UnsupportedOperationException(
+          "ReactInstanceManager.createReactContext is unsupported.");
+    }
  }

  private ReactInstanceDevHelper createDevHelperInterface() {
@@ -1446,6 +1455,7 @@ public class ReactInstanceManager {
   */
  private ReactApplicationContext createReactContext(
      JavaScriptExecutor jsExecutor, JSBundleLoader jsBundleLoader) {
+
    FLog.d(ReactConstants.TAG, "ReactInstanceManager.createReactContext()");
    ReactMarker.logMarker(CREATE_REACT_CONTEXT_START, jsExecutor.getName());

@@ -125,6 +125,16 @@ public object DefaultNewArchitectureEntryPoint {
    privateConcurrentReactEnabled = featureFlags.enableFabricRenderer()
    privateBridgelessEnabled = featureFlags.enableBridgelessArchitecture()

+    val (isValid, errorMessage) =
+        isConfigurationValid(
+            privateTurboModulesEnabled,
+            privateFabricEnabled,
+            privateBridgelessEnabled,
+        )
+    if (!isValid) {
+      error(errorMessage)
+    }
+
    DefaultSoLoader.maybeLoadSoLibrary()
  }

@@ -158,13 +168,13 @@ public object DefaultNewArchitectureEntryPoint {
      fabricEnabled: Boolean,
      bridgelessEnabled: Boolean,
  ): Pair<Boolean, String> =
-      when {
-        fabricEnabled && !turboModulesEnabled ->
-            false to
-                "fabricEnabled=true requires turboModulesEnabled=true (is now false) - Please update your DefaultNewArchitectureEntryPoint.load() parameters."
-        bridgelessEnabled && (!turboModulesEnabled || !fabricEnabled) ->
-            false to
-                "bridgelessEnabled=true requires (turboModulesEnabled=true AND fabricEnabled=true) - Please update your DefaultNewArchitectureEntryPoint.load() parameters."
-        else -> true to ""
+      if (!turboModulesEnabled || !fabricEnabled || !bridgelessEnabled) {
+        false to
+            "You cannot load React Native with the New Architecture disabled. " +
+                "Please use DefaultNewArchitectureEntryPoint.load() instead of " +
+                "DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=$turboModulesEnabled, " +
+                "fabricEnabled=$fabricEnabled, bridgelessEnabled=$bridgelessEnabled)"
+      } else {
+        true to ""
      }
 }
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<34c12f5a31aab5bfb874953f1beefef1>>
+ * @generated SignedSource<<2ecd46fdcab0202d62304dd9cdff76e0>>
 */

 /**
@@ -294,6 +294,12 @@ public object ReactNativeFeatureFlags {
  @JvmStatic
  public fun enableVirtualViewWindowFocusDetection(): Boolean = accessor.enableVirtualViewWindowFocusDetection()

+  /**
+   * Enable Web Performance APIs (Performance Timeline, User Timings, etc.) by default.
+   */
+  @JvmStatic
+  public fun enableWebPerformanceAPIsByDefault(): Boolean = accessor.enableWebPerformanceAPIsByDefault()
+
  /**
   * Uses the default event priority instead of the discreet event priority by default when dispatching events from Fabric to React.
   */
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<392da016e0bf4193b72c44a508811e10>>
+ * @generated SignedSource<<3cbd83777e0840419fee9d582b4da692>>
 */

 /**
@@ -64,6 +64,7 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
  private var enableVirtualViewDebugFeaturesCache: Boolean? = null
  private var enableVirtualViewRenderStateCache: Boolean? = null
  private var enableVirtualViewWindowFocusDetectionCache: Boolean? = null
+  private var enableWebPerformanceAPIsByDefaultCache: Boolean? = null
  private var fixMappingOfEventPrioritiesBetweenFabricAndReactCache: Boolean? = null
  private var fuseboxEnabledReleaseCache: Boolean? = null
  private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
@@ -486,6 +487,15 @@ internal class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAcces
    return cached
  }

+  override fun enableWebPerformanceAPIsByDefault(): Boolean {
+    var cached = enableWebPerformanceAPIsByDefaultCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableWebPerformanceAPIsByDefault()
+      enableWebPerformanceAPIsByDefaultCache = cached
+    }
+    return cached
+  }
+
  override fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean {
    var cached = fixMappingOfEventPrioritiesBetweenFabricAndReactCache
    if (cached == null) {
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<a0453230524ebca2bfb8fad656a6f54a>>
+ * @generated SignedSource<<b92c1fc5d527033d0f7988d88533eb03>>
 */

 /**
@@ -116,6 +116,8 @@ public object ReactNativeFeatureFlagsCxxInterop {

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

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

  @DoNotStrip @JvmStatic public external fun fuseboxEnabledRelease(): Boolean
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<719706a983a073b6c286c49d993f7f80>>
+ * @generated SignedSource<<71354bd41b222239b80129659f5f5d21>>
 */

 /**
@@ -111,6 +111,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi

  override fun enableVirtualViewWindowFocusDetection(): Boolean = false

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

  override fun fuseboxEnabledRelease(): Boolean = false
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<594815ba6a984c460ab8bddd91c5cae2>>
+ * @generated SignedSource<<4ad6fc15663277c2c8b4843f42a078f8>>
 */

 /**
@@ -68,6 +68,7 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
  private var enableVirtualViewDebugFeaturesCache: Boolean? = null
  private var enableVirtualViewRenderStateCache: Boolean? = null
  private var enableVirtualViewWindowFocusDetectionCache: Boolean? = null
+  private var enableWebPerformanceAPIsByDefaultCache: Boolean? = null
  private var fixMappingOfEventPrioritiesBetweenFabricAndReactCache: Boolean? = null
  private var fuseboxEnabledReleaseCache: Boolean? = null
  private var fuseboxNetworkInspectionEnabledCache: Boolean? = null
@@ -534,6 +535,16 @@ internal class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcc
    return cached
  }

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

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

  override fun enableFabricRenderer(): Boolean = true

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

  override fun useTurboModuleInterop(): Boolean = true
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<dfbd5e84392f1fda0e68324582c328b2>>
+ * @generated SignedSource<<51e9b65c32aa4a990f21afd4f0244223>>
 */

 /**
@@ -111,6 +111,8 @@ public interface ReactNativeFeatureFlagsProvider {

  @DoNotStrip public fun enableVirtualViewWindowFocusDetection(): Boolean

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

  @DoNotStrip public fun fuseboxEnabledRelease(): Boolean
@@ -1,15 +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.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
 *
 * @generated by scripts/releases/set-version.js
 */
+
 package com.facebook.react.modules.systeminfo

 public object ReactNativeVersion {
  @JvmField
-  public val VERSION: Map<String, Any?> =
-      mapOf("major" to 1000, "minor" to 0, "patch" to 0, "prerelease" to null)
+  public val VERSION: Map<String, Any?> = mapOf(
+    "major" to 0,
+    "minor" to 82,
+    "patch" to 1,
+    "prerelease" to null
+  )
 }
@@ -22,6 +22,8 @@ file(TO_CMAKE_PATH "${REACT_ANDROID_DIR}" REACT_ANDROID_DIR)
 file(TO_CMAKE_PATH "${REACT_BUILD_DIR}" REACT_BUILD_DIR)
 file(TO_CMAKE_PATH "${REACT_COMMON_DIR}" REACT_COMMON_DIR)

+set(HERMES_V1_ENABLED OFF CACHE BOOL "Build with support for Hermes v1")
+
 # If you have ccache installed, we're going to honor it.
 find_program(CCACHE_FOUND ccache)
 if(CCACHE_FOUND)
@@ -122,6 +124,7 @@ add_react_common_subdir(react/nativemodule/dom)
 add_react_common_subdir(react/nativemodule/featureflags)
 add_react_common_subdir(react/nativemodule/microtasks)
 add_react_common_subdir(react/nativemodule/idlecallbacks)
+add_react_common_subdir(react/nativemodule/webperformance)
 add_react_common_subdir(jserrorhandler)
 add_react_common_subdir(react/runtime)
 add_react_common_subdir(react/runtime/hermes)
@@ -188,6 +191,7 @@ add_library(reactnative
          $<TARGET_OBJECTS:react_nativemodule_featureflags>
          $<TARGET_OBJECTS:react_nativemodule_idlecallbacks>
          $<TARGET_OBJECTS:react_nativemodule_microtasks>
+          $<TARGET_OBJECTS:react_nativemodule_webperformance>
          $<TARGET_OBJECTS:react_newarchdefaults>
          $<TARGET_OBJECTS:react_performance_cdpmetrics>
          $<TARGET_OBJECTS:react_performance_timeline>
@@ -277,6 +281,7 @@ target_include_directories(reactnative
        $<TARGET_PROPERTY:react_nativemodule_featureflags,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_nativemodule_idlecallbacks,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_nativemodule_microtasks,INTERFACE_INCLUDE_DIRECTORIES>
+        $<TARGET_PROPERTY:react_nativemodule_webperformance,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_newarchdefaults,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_performance_cdpmetrics,INTERFACE_INCLUDE_DIRECTORIES>
        $<TARGET_PROPERTY:react_performance_timeline,INTERFACE_INCLUDE_DIRECTORIES>
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<16b12024bb363358ef09b9a42cb2fc97>>
+ * @generated SignedSource<<f4ec3b7b6f99dd3409d872470872ece6>>
 */

 /**
@@ -303,6 +303,12 @@ class ReactNativeFeatureFlagsJavaProvider
    return method(javaProvider_);
  }

+  bool enableWebPerformanceAPIsByDefault() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableWebPerformanceAPIsByDefault");
+    return method(javaProvider_);
+  }
+
  bool fixMappingOfEventPrioritiesBetweenFabricAndReact() override {
    static const auto method =
        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("fixMappingOfEventPrioritiesBetweenFabricAndReact");
@@ -677,6 +683,11 @@ bool JReactNativeFeatureFlagsCxxInterop::enableVirtualViewWindowFocusDetection(
  return ReactNativeFeatureFlags::enableVirtualViewWindowFocusDetection();
 }

+bool JReactNativeFeatureFlagsCxxInterop::enableWebPerformanceAPIsByDefault(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableWebPerformanceAPIsByDefault();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::fixMappingOfEventPrioritiesBetweenFabricAndReact(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
  return ReactNativeFeatureFlags::fixMappingOfEventPrioritiesBetweenFabricAndReact();
@@ -965,6 +976,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
      makeNativeMethod(
        "enableVirtualViewWindowFocusDetection",
        JReactNativeFeatureFlagsCxxInterop::enableVirtualViewWindowFocusDetection),
+      makeNativeMethod(
+        "enableWebPerformanceAPIsByDefault",
+        JReactNativeFeatureFlagsCxxInterop::enableWebPerformanceAPIsByDefault),
      makeNativeMethod(
        "fixMappingOfEventPrioritiesBetweenFabricAndReact",
        JReactNativeFeatureFlagsCxxInterop::fixMappingOfEventPrioritiesBetweenFabricAndReact),
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<54118ccd475a8bf1d7db83304b1f17d0>>
+ * @generated SignedSource<<d34119ad2e9a068463e8a31ecced59d9>>
 */

 /**
@@ -162,6 +162,9 @@ class JReactNativeFeatureFlagsCxxInterop
  static bool enableVirtualViewWindowFocusDetection(
    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);

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

@@ -27,4 +27,8 @@ target_link_libraries(
 target_compile_reactnative_options(hermes_executor PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(hermes_executor PRIVATE -DHERMES_ENABLE_DEBUGGER=1)
+
+  if (HERMES_V1_ENABLED)
+        target_compile_options(hermes_executor PRIVATE -DHERMES_V1_ENABLED=1)
+  endif()
 endif()
@@ -39,7 +39,9 @@ void processTransform(
  }

  auto result = BaseViewProps::resolveTransform(
-      Size(viewWidth, viewHeight), transform, transformOrigin);
+      Size{.width = viewWidth, .height = viewHeight},
+      transform,
+      transformOrigin);

  // Convert from matrix of floats to double matrix
  constexpr size_t MatrixSize = std::tuple_size_v<decltype(result.matrix)>;
@@ -29,4 +29,8 @@ target_link_libraries(hermesinstancejni
 target_compile_reactnative_options(hermesinstancejni PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(hermesinstancejni PRIVATE -DHERMES_ENABLE_DEBUGGER=1)
+
+  if (HERMES_V1_ENABLED)
+        target_compile_options(hermesinstancejni PRIVATE -DHERMES_V1_ENABLED=1)
+  endif()
 endif ()
@@ -19,6 +19,10 @@ add_library(rninstance
 target_compile_reactnative_options(rninstance PRIVATE)
 if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
  target_compile_options(rninstance PRIVATE -DHERMES_ENABLE_DEBUGGER=1)
+
+  if (HERMES_V1_ENABLED)
+        target_compile_options(rninstance PRIVATE -DHERMES_V1_ENABLED=1)
+  endif()
 endif ()

 target_merge_so(rninstance)
@@ -13,36 +13,48 @@ import org.junit.Test
 class DefaultNewArchitectureEntryPointTest {

  @Test
-  fun isConfigurationValid_withEverythingOff_returnsTrue() {
-    val (isValid, _) =
+  fun isConfigurationValid_withEverythingOff_returnsFalse() {
+    val (isValid, errorMessage) =
        DefaultNewArchitectureEntryPoint.isConfigurationValid(
            turboModulesEnabled = false,
            fabricEnabled = false,
            bridgelessEnabled = false,
        )
-    assertThat(isValid).isTrue()
+    assertThat(isValid).isFalse()
+    assertThat(errorMessage)
+        .isEqualTo(
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=false, fabricEnabled=false, bridgelessEnabled=false)"
+        )
  }

  @Test
-  fun isConfigurationValid_withNewArchOn_returnsTrue() {
-    val (isValid, _) =
+  fun isConfigurationValid_withNewArchOnlyOn_returnsFalse() {
+    val (isValid, errorMessage) =
        DefaultNewArchitectureEntryPoint.isConfigurationValid(
            turboModulesEnabled = true,
            fabricEnabled = true,
            bridgelessEnabled = false,
        )
-    assertThat(isValid).isTrue()
+    assertThat(isValid).isFalse()
+    assertThat(errorMessage)
+        .isEqualTo(
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=true, fabricEnabled=true, bridgelessEnabled=false)"
+        )
  }

  @Test
-  fun isConfigurationValid_withTurboModulesOnlyOn_returnsTrue() {
-    val (isValid, _) =
+  fun isConfigurationValid_withTurboModulesOnlyOn_returnsFalse() {
+    val (isValid, errorMessage) =
        DefaultNewArchitectureEntryPoint.isConfigurationValid(
            turboModulesEnabled = true,
            fabricEnabled = false,
            bridgelessEnabled = false,
        )
-    assertThat(isValid).isTrue()
+    assertThat(isValid).isFalse()
+    assertThat(errorMessage)
+        .isEqualTo(
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=true, fabricEnabled=false, bridgelessEnabled=false)"
+        )
  }

  @Test
@@ -67,7 +79,7 @@ class DefaultNewArchitectureEntryPointTest {
    assertThat(isValid).isFalse()
    assertThat(errorMessage)
        .isEqualTo(
-            "fabricEnabled=true requires turboModulesEnabled=true (is now false) - Please update your DefaultNewArchitectureEntryPoint.load() parameters."
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=false, fabricEnabled=true, bridgelessEnabled=false)"
        )
  }

@@ -82,7 +94,7 @@ class DefaultNewArchitectureEntryPointTest {
    assertThat(isValid).isFalse()
    assertThat(errorMessage)
        .isEqualTo(
-            "fabricEnabled=true requires turboModulesEnabled=true (is now false) - Please update your DefaultNewArchitectureEntryPoint.load() parameters."
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=false, fabricEnabled=true, bridgelessEnabled=true)"
        )
  }

@@ -97,7 +109,7 @@ class DefaultNewArchitectureEntryPointTest {
    assertThat(isValid).isFalse()
    assertThat(errorMessage)
        .isEqualTo(
-            "bridgelessEnabled=true requires (turboModulesEnabled=true AND fabricEnabled=true) - Please update your DefaultNewArchitectureEntryPoint.load() parameters."
+            "You cannot load React Native with the New Architecture disabled. Please use DefaultNewArchitectureEntryPoint.load() instead of DefaultNewArchitectureEntryPoint.load(turboModulesEnabled=true, fabricEnabled=false, bridgelessEnabled=true)"
        )
  }
 }
@@ -12,16 +12,16 @@
 #include <cstdint>
 #include <string_view>

-#define REACT_NATIVE_VERSION_MAJOR 1000
-#define REACT_NATIVE_VERSION_MINOR 0
-#define REACT_NATIVE_VERSION_PATCH 0
+#define REACT_NATIVE_VERSION_MAJOR 0
+#define REACT_NATIVE_VERSION_MINOR 82
+#define REACT_NATIVE_VERSION_PATCH 1

 namespace facebook::react {

 constexpr struct {
-  int32_t Major = 1000;
-  int32_t Minor = 0;
-  int32_t Patch = 0;
+  int32_t Major = 0;
+  int32_t Minor = 82;
+  int32_t Patch = 1;
  std::string_view Prerelease = "";
 } ReactNativeVersion;

@@ -32,6 +32,10 @@ if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
                PRIVATE
                -DHERMES_ENABLE_DEBUGGER=1
        )
+
+        if (HERMES_V1_ENABLED)
+                target_compile_options(hermes_executor_common PRIVATE -DHERMES_V1_ENABLED=1)
+        endif()
 else()
        target_compile_options(
                hermes_executor_common
@@ -14,8 +14,11 @@
 #include <jsinspector-modern/InspectorFlags.h>

 #include <hermes/inspector-modern/chrome/HermesRuntimeTargetDelegate.h>
+
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
 #include <hermes/inspector-modern/chrome/Registration.h>
 #include <hermes/inspector/RuntimeAdapter.h>
+#endif

 using namespace facebook::hermes;
 using namespace facebook::jsi;
@@ -24,7 +27,7 @@ namespace facebook::react {

 namespace {

-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 class HermesExecutorRuntimeAdapter
    : public facebook::hermes::inspector_modern::RuntimeAdapter {
@@ -59,7 +62,7 @@ class HermesExecutorRuntimeAdapter
  std::shared_ptr<MessageQueueThread> thread_;
 };

-#endif // HERMES_ENABLE_DEBUGGER
+#endif // defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 struct ReentrancyCheck {
 // This is effectively a very subtle and complex assert, so only
@@ -144,7 +147,7 @@ class DecoratedRuntime : public jsi::WithRuntimeDecorator<ReentrancyCheck> {
      const std::string& debuggerName)
      : jsi::WithRuntimeDecorator<ReentrancyCheck>(*runtime, reentrancyCheck_),
        runtime_(std::move(runtime)) {
-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
    enableDebugger_ = enableDebugger;
    if (enableDebugger_) {
      std::shared_ptr<HermesRuntime> rt(runtime_, &hermesRuntime);
@@ -159,7 +162,7 @@ class DecoratedRuntime : public jsi::WithRuntimeDecorator<ReentrancyCheck> {
  }

  ~DecoratedRuntime() {
-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
    if (enableDebugger_) {
      facebook::hermes::inspector_modern::chrome::disableDebugging(debugToken_);
    }
@@ -176,7 +179,7 @@ class DecoratedRuntime : public jsi::WithRuntimeDecorator<ReentrancyCheck> {

  std::shared_ptr<Runtime> runtime_;
  ReentrancyCheck reentrancyCheck_;
-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
  bool enableDebugger_;
  facebook::hermes::inspector_modern::chrome::DebugSessionToken debugToken_;
 #endif // HERMES_ENABLE_DEBUGGER
@@ -23,6 +23,10 @@ if(${CMAKE_BUILD_TYPE} MATCHES Debug OR REACT_NATIVE_DEBUG_OPTIMIZED)
                PRIVATE
                -DHERMES_ENABLE_DEBUGGER=1
        )
+
+        if (HERMES_V1_ENABLED)
+                target_compile_options(hermes_inspector_modern PRIVATE -DHERMES_V1_ENABLED=1)
+        endif()
 endif()

 target_include_directories(hermes_inspector_modern PUBLIC ${REACT_COMMON_DIR})
@@ -7,7 +7,7 @@

 #include "ConnectionDemux.h"

-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 #include <hermes/inspector/RuntimeAdapter.h>
 #include <hermes/inspector/chrome/CDPHandler.h>
@@ -139,4 +139,4 @@ void ConnectionDemux::removePage(int pageId) {

 } // namespace facebook::hermes::inspector_modern::chrome

-#endif // HERMES_ENABLE_DEBUGGER
+#endif // defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
@@ -7,7 +7,7 @@

 #pragma once

-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 #include <memory>
 #include <mutex>
@@ -59,4 +59,4 @@ class ConnectionDemux {

 } // namespace facebook::hermes::inspector_modern::chrome

-#endif // HERMES_ENABLE_DEBUGGER
+#endif // defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
@@ -8,7 +8,7 @@
 #include "Registration.h"
 #include "ConnectionDemux.h"

-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 namespace facebook::hermes::inspector_modern::chrome {

@@ -34,4 +34,4 @@ void disableDebugging(DebugSessionToken session) {

 } // namespace facebook::hermes::inspector_modern::chrome

-#endif // HERMES_ENABLE_DEBUGGER
+#endif // defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
@@ -7,7 +7,7 @@

 #pragma once

-#ifdef HERMES_ENABLE_DEBUGGER
+#if defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)

 #include <memory>
 #include <string>
@@ -38,4 +38,4 @@ extern void disableDebugging(DebugSessionToken session);

 } // namespace facebook::hermes::inspector_modern::chrome

-#endif // HERMES_ENABLE_DEBUGGER
+#endif // defined(HERMES_ENABLE_DEBUGGER) && !defined(HERMES_V1_ENABLED)
@@ -54,6 +54,8 @@ Pod::Spec.new do |s|
  add_dependency(s, "React-jsinspectornetwork", :framework_name => 'jsinspector_modernnetwork')
  add_dependency(s, "React-jsinspectortracing", :framework_name => 'jsinspector_moderntracing')
  s.dependency "React-perflogger", version
+  add_dependency(s, "React-oscompat")
+
  if use_hermes()
    s.dependency "hermes-engine"
  end
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<12a06ea04fc09c34f1fbdcbdf6046d81>>
+ * @generated SignedSource<<ce235bb558df2f110e0446e68cf6bc6a>>
 */

 /**
@@ -202,6 +202,10 @@ bool ReactNativeFeatureFlags::enableVirtualViewWindowFocusDetection() {
  return getAccessor().enableVirtualViewWindowFocusDetection();
 }

+bool ReactNativeFeatureFlags::enableWebPerformanceAPIsByDefault() {
+  return getAccessor().enableWebPerformanceAPIsByDefault();
+}
+
 bool ReactNativeFeatureFlags::fixMappingOfEventPrioritiesBetweenFabricAndReact() {
  return getAccessor().fixMappingOfEventPrioritiesBetweenFabricAndReact();
 }
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<eee81e4e9bb13ef5134d4e2d79876b38>>
+ * @generated SignedSource<<55cd4ef6cd8902af5c0959077336b0bb>>
 */

 /**
@@ -259,6 +259,11 @@ class ReactNativeFeatureFlags {
   */
  RN_EXPORT static bool enableVirtualViewWindowFocusDetection();

+  /**
+   * Enable Web Performance APIs (Performance Timeline, User Timings, etc.) by default.
+   */
+  RN_EXPORT static bool enableWebPerformanceAPIsByDefault();
+
  /**
   * Uses the default event priority instead of the discreet event priority by default when dispatching events from Fabric to React.
   */
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<3c5588a851e6cdefaba22236c5ebb828>>
+ * @generated SignedSource<<bccad78ad6684e7aeb741e3cbf1b8331>>
 */

 /**
@@ -821,6 +821,24 @@ bool ReactNativeFeatureFlagsAccessor::enableVirtualViewWindowFocusDetection() {
  return flagValue.value();
 }

+bool ReactNativeFeatureFlagsAccessor::enableWebPerformanceAPIsByDefault() {
+  auto flagValue = enableWebPerformanceAPIsByDefault_.load();
+
+  if (!flagValue.has_value()) {
+    // This block is not exclusive but it is not necessary.
+    // If multiple threads try to initialize the feature flag, we would only
+    // be accessing the provider multiple times but the end state of this
+    // instance and the returned flag value would be the same.
+
+    markFlagAsAccessed(44, "enableWebPerformanceAPIsByDefault");
+
+    flagValue = currentProvider_->enableWebPerformanceAPIsByDefault();
+    enableWebPerformanceAPIsByDefault_ = flagValue;
+  }
+
+  return flagValue.value();
+}
+
 bool ReactNativeFeatureFlagsAccessor::fixMappingOfEventPrioritiesBetweenFabricAndReact() {
  auto flagValue = fixMappingOfEventPrioritiesBetweenFabricAndReact_.load();

@@ -830,7 +848,7 @@ bool ReactNativeFeatureFlagsAccessor::fixMappingOfEventPrioritiesBetweenFabricAn
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(44, "fixMappingOfEventPrioritiesBetweenFabricAndReact");
+    markFlagAsAccessed(45, "fixMappingOfEventPrioritiesBetweenFabricAndReact");

    flagValue = currentProvider_->fixMappingOfEventPrioritiesBetweenFabricAndReact();
    fixMappingOfEventPrioritiesBetweenFabricAndReact_ = flagValue;
@@ -848,7 +866,7 @@ bool ReactNativeFeatureFlagsAccessor::fuseboxEnabledRelease() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(45, "fuseboxEnabledRelease");
+    markFlagAsAccessed(46, "fuseboxEnabledRelease");

    flagValue = currentProvider_->fuseboxEnabledRelease();
    fuseboxEnabledRelease_ = flagValue;
@@ -866,7 +884,7 @@ bool ReactNativeFeatureFlagsAccessor::fuseboxNetworkInspectionEnabled() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(46, "fuseboxNetworkInspectionEnabled");
+    markFlagAsAccessed(47, "fuseboxNetworkInspectionEnabled");

    flagValue = currentProvider_->fuseboxNetworkInspectionEnabled();
    fuseboxNetworkInspectionEnabled_ = flagValue;
@@ -884,7 +902,7 @@ bool ReactNativeFeatureFlagsAccessor::hideOffscreenVirtualViewsOnIOS() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(47, "hideOffscreenVirtualViewsOnIOS");
+    markFlagAsAccessed(48, "hideOffscreenVirtualViewsOnIOS");

    flagValue = currentProvider_->hideOffscreenVirtualViewsOnIOS();
    hideOffscreenVirtualViewsOnIOS_ = flagValue;
@@ -902,7 +920,7 @@ bool ReactNativeFeatureFlagsAccessor::perfMonitorV2Enabled() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(48, "perfMonitorV2Enabled");
+    markFlagAsAccessed(49, "perfMonitorV2Enabled");

    flagValue = currentProvider_->perfMonitorV2Enabled();
    perfMonitorV2Enabled_ = flagValue;
@@ -920,7 +938,7 @@ double ReactNativeFeatureFlagsAccessor::preparedTextCacheSize() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(49, "preparedTextCacheSize");
+    markFlagAsAccessed(50, "preparedTextCacheSize");

    flagValue = currentProvider_->preparedTextCacheSize();
    preparedTextCacheSize_ = flagValue;
@@ -938,7 +956,7 @@ bool ReactNativeFeatureFlagsAccessor::preventShadowTreeCommitExhaustion() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(50, "preventShadowTreeCommitExhaustion");
+    markFlagAsAccessed(51, "preventShadowTreeCommitExhaustion");

    flagValue = currentProvider_->preventShadowTreeCommitExhaustion();
    preventShadowTreeCommitExhaustion_ = flagValue;
@@ -956,7 +974,7 @@ bool ReactNativeFeatureFlagsAccessor::releaseImageDataWhenConsumed() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(51, "releaseImageDataWhenConsumed");
+    markFlagAsAccessed(52, "releaseImageDataWhenConsumed");

    flagValue = currentProvider_->releaseImageDataWhenConsumed();
    releaseImageDataWhenConsumed_ = flagValue;
@@ -974,7 +992,7 @@ bool ReactNativeFeatureFlagsAccessor::shouldPressibilityUseW3CPointerEventsForHo
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(52, "shouldPressibilityUseW3CPointerEventsForHover");
+    markFlagAsAccessed(53, "shouldPressibilityUseW3CPointerEventsForHover");

    flagValue = currentProvider_->shouldPressibilityUseW3CPointerEventsForHover();
    shouldPressibilityUseW3CPointerEventsForHover_ = flagValue;
@@ -992,7 +1010,7 @@ bool ReactNativeFeatureFlagsAccessor::skipActivityIdentityAssertionOnHostPause()
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(53, "skipActivityIdentityAssertionOnHostPause");
+    markFlagAsAccessed(54, "skipActivityIdentityAssertionOnHostPause");

    flagValue = currentProvider_->skipActivityIdentityAssertionOnHostPause();
    skipActivityIdentityAssertionOnHostPause_ = flagValue;
@@ -1010,7 +1028,7 @@ bool ReactNativeFeatureFlagsAccessor::sweepActiveTouchOnChildNativeGesturesAndro
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(54, "sweepActiveTouchOnChildNativeGesturesAndroid");
+    markFlagAsAccessed(55, "sweepActiveTouchOnChildNativeGesturesAndroid");

    flagValue = currentProvider_->sweepActiveTouchOnChildNativeGesturesAndroid();
    sweepActiveTouchOnChildNativeGesturesAndroid_ = flagValue;
@@ -1028,7 +1046,7 @@ bool ReactNativeFeatureFlagsAccessor::traceTurboModulePromiseRejectionsOnAndroid
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(55, "traceTurboModulePromiseRejectionsOnAndroid");
+    markFlagAsAccessed(56, "traceTurboModulePromiseRejectionsOnAndroid");

    flagValue = currentProvider_->traceTurboModulePromiseRejectionsOnAndroid();
    traceTurboModulePromiseRejectionsOnAndroid_ = flagValue;
@@ -1046,7 +1064,7 @@ bool ReactNativeFeatureFlagsAccessor::updateRuntimeShadowNodeReferencesOnCommit(
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(56, "updateRuntimeShadowNodeReferencesOnCommit");
+    markFlagAsAccessed(57, "updateRuntimeShadowNodeReferencesOnCommit");

    flagValue = currentProvider_->updateRuntimeShadowNodeReferencesOnCommit();
    updateRuntimeShadowNodeReferencesOnCommit_ = flagValue;
@@ -1064,7 +1082,7 @@ bool ReactNativeFeatureFlagsAccessor::useAlwaysAvailableJSErrorHandling() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(57, "useAlwaysAvailableJSErrorHandling");
+    markFlagAsAccessed(58, "useAlwaysAvailableJSErrorHandling");

    flagValue = currentProvider_->useAlwaysAvailableJSErrorHandling();
    useAlwaysAvailableJSErrorHandling_ = flagValue;
@@ -1082,7 +1100,7 @@ bool ReactNativeFeatureFlagsAccessor::useFabricInterop() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(58, "useFabricInterop");
+    markFlagAsAccessed(59, "useFabricInterop");

    flagValue = currentProvider_->useFabricInterop();
    useFabricInterop_ = flagValue;
@@ -1100,7 +1118,7 @@ bool ReactNativeFeatureFlagsAccessor::useNativeEqualsInNativeReadableArrayAndroi
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(59, "useNativeEqualsInNativeReadableArrayAndroid");
+    markFlagAsAccessed(60, "useNativeEqualsInNativeReadableArrayAndroid");

    flagValue = currentProvider_->useNativeEqualsInNativeReadableArrayAndroid();
    useNativeEqualsInNativeReadableArrayAndroid_ = flagValue;
@@ -1118,7 +1136,7 @@ bool ReactNativeFeatureFlagsAccessor::useNativeTransformHelperAndroid() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(60, "useNativeTransformHelperAndroid");
+    markFlagAsAccessed(61, "useNativeTransformHelperAndroid");

    flagValue = currentProvider_->useNativeTransformHelperAndroid();
    useNativeTransformHelperAndroid_ = flagValue;
@@ -1136,7 +1154,7 @@ bool ReactNativeFeatureFlagsAccessor::useNativeViewConfigsInBridgelessMode() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(61, "useNativeViewConfigsInBridgelessMode");
+    markFlagAsAccessed(62, "useNativeViewConfigsInBridgelessMode");

    flagValue = currentProvider_->useNativeViewConfigsInBridgelessMode();
    useNativeViewConfigsInBridgelessMode_ = flagValue;
@@ -1154,7 +1172,7 @@ bool ReactNativeFeatureFlagsAccessor::useOptimizedEventBatchingOnAndroid() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(62, "useOptimizedEventBatchingOnAndroid");
+    markFlagAsAccessed(63, "useOptimizedEventBatchingOnAndroid");

    flagValue = currentProvider_->useOptimizedEventBatchingOnAndroid();
    useOptimizedEventBatchingOnAndroid_ = flagValue;
@@ -1172,7 +1190,7 @@ bool ReactNativeFeatureFlagsAccessor::useRawPropsJsiValue() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(63, "useRawPropsJsiValue");
+    markFlagAsAccessed(64, "useRawPropsJsiValue");

    flagValue = currentProvider_->useRawPropsJsiValue();
    useRawPropsJsiValue_ = flagValue;
@@ -1190,7 +1208,7 @@ bool ReactNativeFeatureFlagsAccessor::useShadowNodeStateOnClone() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(64, "useShadowNodeStateOnClone");
+    markFlagAsAccessed(65, "useShadowNodeStateOnClone");

    flagValue = currentProvider_->useShadowNodeStateOnClone();
    useShadowNodeStateOnClone_ = flagValue;
@@ -1208,7 +1226,7 @@ bool ReactNativeFeatureFlagsAccessor::useTurboModuleInterop() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(65, "useTurboModuleInterop");
+    markFlagAsAccessed(66, "useTurboModuleInterop");

    flagValue = currentProvider_->useTurboModuleInterop();
    useTurboModuleInterop_ = flagValue;
@@ -1226,7 +1244,7 @@ bool ReactNativeFeatureFlagsAccessor::useTurboModules() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(66, "useTurboModules");
+    markFlagAsAccessed(67, "useTurboModules");

    flagValue = currentProvider_->useTurboModules();
    useTurboModules_ = flagValue;
@@ -1244,7 +1262,7 @@ double ReactNativeFeatureFlagsAccessor::virtualViewHysteresisRatio() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(67, "virtualViewHysteresisRatio");
+    markFlagAsAccessed(68, "virtualViewHysteresisRatio");

    flagValue = currentProvider_->virtualViewHysteresisRatio();
    virtualViewHysteresisRatio_ = flagValue;
@@ -1262,7 +1280,7 @@ double ReactNativeFeatureFlagsAccessor::virtualViewPrerenderRatio() {
    // be accessing the provider multiple times but the end state of this
    // instance and the returned flag value would be the same.

-    markFlagAsAccessed(68, "virtualViewPrerenderRatio");
+    markFlagAsAccessed(69, "virtualViewPrerenderRatio");

    flagValue = currentProvider_->virtualViewPrerenderRatio();
    virtualViewPrerenderRatio_ = flagValue;
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<f1eb31a7412bff743a5c581224d71e2a>>
+ * @generated SignedSource<<8131db9fc73621cf2a63be9d775dfc3d>>
 */

 /**
@@ -76,6 +76,7 @@ class ReactNativeFeatureFlagsAccessor {
  bool enableVirtualViewDebugFeatures();
  bool enableVirtualViewRenderState();
  bool enableVirtualViewWindowFocusDetection();
+  bool enableWebPerformanceAPIsByDefault();
  bool fixMappingOfEventPrioritiesBetweenFabricAndReact();
  bool fuseboxEnabledRelease();
  bool fuseboxNetworkInspectionEnabled();
@@ -112,7 +113,7 @@ class ReactNativeFeatureFlagsAccessor {
  std::unique_ptr<ReactNativeFeatureFlagsProvider> currentProvider_;
  bool wasOverridden_;

-  std::array<std::atomic<const char*>, 69> accessedFeatureFlags_;
+  std::array<std::atomic<const char*>, 70> accessedFeatureFlags_;

  std::atomic<std::optional<bool>> commonTestFlag_;
  std::atomic<std::optional<bool>> cdpInteractionMetricsEnabled_;
@@ -158,6 +159,7 @@ class ReactNativeFeatureFlagsAccessor {
  std::atomic<std::optional<bool>> enableVirtualViewDebugFeatures_;
  std::atomic<std::optional<bool>> enableVirtualViewRenderState_;
  std::atomic<std::optional<bool>> enableVirtualViewWindowFocusDetection_;
+  std::atomic<std::optional<bool>> enableWebPerformanceAPIsByDefault_;
  std::atomic<std::optional<bool>> fixMappingOfEventPrioritiesBetweenFabricAndReact_;
  std::atomic<std::optional<bool>> fuseboxEnabledRelease_;
  std::atomic<std::optional<bool>> fuseboxNetworkInspectionEnabled_;
@@ -4,7 +4,7 @@
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
- * @generated SignedSource<<a76f1a1e8ba0d65b689b4b87d33d7ced>>
+ * @generated SignedSource<<ca1bff402a7b8c5048b50e0a7c09c0da>>
 */

 /**
@@ -203,6 +203,10 @@ class ReactNativeFeatureFlagsDefaults : public ReactNativeFeatureFlagsProvider {
    return false;
  }

+  bool enableWebPerformanceAPIsByDefault() override {
+    return false;
+  }
+
  bool fixMappingOfEventPrioritiesBetweenFabricAndReact() override {
    return false;
  }
--- a/Show More
+++ b/Show More