diff --git a/.github/workflows/commit_artifacts.yml b/.github/workflows/commit_artifacts.yml
index aec96b0fe31fb..8c016b276ff05 100644
--- a/.github/workflows/commit_artifacts.yml
+++ b/.github/workflows/commit_artifacts.yml
@@ -52,6 +52,7 @@ jobs:
           CIRCLECI_TOKEN: ${{secrets.CIRCLECI_TOKEN_DIFFTRAIN}}
         with:
           script: |
+            // TODO: Move this to a script file.
             const cp = require('child_process');
 
             function sleep(ms) {
@@ -250,14 +251,18 @@ jobs:
           grep -rl "$CURRENT_VERSION_MODERN" ./compiled || echo "No files found with $CURRENT_VERSION_MODERN"
           grep -rl "$CURRENT_VERSION_MODERN" ./compiled | xargs -r sed -i -e "s/$CURRENT_VERSION_MODERN/$LAST_VERSION_MODERN/g"
           grep -rl "$CURRENT_VERSION_MODERN" ./compiled || echo "Modern version reverted"
-      - name: Check if only the REVISION file has changed
+      - name: Check for changes
         id: check_should_commit
         run: |
           echo "Full git status"
+          git add .
           git status
           echo "===================="
           if git status --porcelain | grep -qv '/REVISION'; then
             echo "Changes detected"
+            echo "===== Changes ====="
+            git --no-pager diff -U0 | grep '^[+-]' | head -n 50
+            echo "==================="
             echo "should_commit=true" >> "$GITHUB_OUTPUT"
           else
             echo "No Changes detected"
@@ -322,17 +327,109 @@ jobs:
           grep -rl "$CURRENT_VERSION" ./compiled-rn || echo "No files found with $CURRENT_VERSION"
           grep -rl "$CURRENT_VERSION" ./compiled-rn | xargs -r sed -i -e "s/$CURRENT_VERSION/$LAST_VERSION/g"
           grep -rl "$CURRENT_VERSION" ./compiled-rn || echo "Version reverted"
-      - name: Check if only the REVISION file has changed
-        id: check_should_commit
+      - name: Check changes before signing
         run: |
           echo "Full git status"
+          git add .
           git status
           echo "===================="
-          echo "Checking for changes"
-          # Check if there are changes in the files other than REVISION or @generated headers
-          # We also filter out the file name lines with "---" and "+++".
-          if git diff -- . ':(exclude)*REVISION' | grep -vE "^(@@|diff|index|\-\-\-|\+\+\+|@generated SignedSource)" | grep "^[+-]" > /dev/null; then
+          if git status --porcelain | grep -qv '/REVISION'; then
+            echo "Changes detected"
+            echo "===== Changes ====="
+            git --no-pager diff -U0 --cached | grep '^[+-]' | head -n 50
+            echo "==================="
+          else
+            echo "No Changes detected"
+          fi
+      - name: Revert signatures
+        uses: actions/github-script@v6
+        with:
+          script: |
+            // TODO: Move this to a script file.
+            // We currently can't call scripts from the repo because
+            // at this point in the workflow, we're on the compiled
+            // artifact branch (so the scripts don't exist).
+            // We can fix this with a composite action in the main repo.
+            // This script is duplicated below.
+            const fs = require('fs');
+            const crypto = require('crypto');
+            const {execSync} = require('child_process');
+
+            // TODO: when we move this to a script, we can use this from npm.
+            // Copy of signedsource since we can't install deps on this branch
+            const GENERATED = '@' + 'generated';
+            const NEWTOKEN = '<<SignedSource::*O*zOeWoEQle#+L!plEphiEmie@IsG>>';
+            const PATTERN = new RegExp(`${GENERATED} (?:SignedSource<<([a-f0-9]{32})>>)`);
+
+            const TokenNotFoundError = new Error(
+              `SignedSource.signFile(...): Cannot sign file without token: ${NEWTOKEN}`
+            );
+
+            function hash(data, encoding) {
+              const md5sum = crypto.createHash('md5');
+              md5sum.update(data, encoding);
+              return md5sum.digest('hex');
+            }
+
+            const SignedSource = {
+              getSigningToken() {
+                return `${GENERATED} ${NEWTOKEN}`;
+              },
+              isSigned(data) {
+                return PATTERN.exec(data) != null;
+              },
+              signFile(data) {
+                if (!data.includes(NEWTOKEN)) {
+                  if (SignedSource.isSigned(data)) {
+                    // Signing a file that was previously signed.
+                   data = data.replace(PATTERN, SignedSource.getSigningToken());
+                  } else {
+                    throw TokenNotFoundError;
+                  }
+                }
+                return data.replace(NEWTOKEN, `SignedSource<<${hash(data, 'utf8')}>>`);
+              },
+            };
+
+            const directory = './compiled-rn';
+            console.log('Signing files in directory:', directory);
+            try {
+              const result = execSync(`git status --porcelain ${directory}`, {encoding: 'utf8'});
+
+              // Parse the git status output to get file paths
+              const files = result.split('\n').filter(file => file.endsWith('.js'));
+
+              if (files.length === 0) {
+                throw new Error(
+                  'git status returned no files to sign. this job should not have run.'
+                );
+              } else {
+                files.forEach(line => {
+                  const file = line.slice(3).trim();
+                  if (file) {
+                    console.log('  Signing file:', file);
+                    const originalContents = fs.readFileSync(file, 'utf8');
+                    const signedContents = SignedSource.signFile(originalContents);
+                    fs.writeFileSync(file, signedContents, 'utf8');
+                  }
+                });
+              }
+            } catch (e) {
+              process.exitCode = 1;
+              console.error('Error signing files:', e);
+            }
+      - name: Check for changes
+        id: check_should_commit
+        run: |
+          echo "Full git status"
+          git add .
+          git status --porcelain
+          echo "===================="
+          if git status --porcelain | grep -qv '/REVISION'; then
             echo "Changes detected"
+            echo "===== Changes ====="
+             git --no-pager diff -U0 --cached | grep '^[+-]' | head -n 50
+            echo "==================="
             echo "should_commit=true" >> "$GITHUB_OUTPUT"
           else
             echo "No Changes detected"
@@ -348,10 +445,92 @@ jobs:
           grep -rl "$LAST_VERSION" ./compiled-rn || echo "No files found with $LAST_VERSION"
           grep -rl "$LAST_VERSION" ./compiled-rn | xargs -r sed -i -e "s/$LAST_VERSION/$CURRENT_VERSION/g"
           grep -rl "$LAST_VERSION" ./compiled-rn || echo "Version re-applied"
-      - name: Will commit these changes
+      - name: Add files
         if: steps.check_should_commit.outputs.should_commit == 'true'
         run: |
           echo ":"
+          git add .
+      - name: Signing files
+        if: steps.check_should_commit.outputs.should_commit == 'true'
+        uses: actions/github-script@v6
+        with:
+          script: |
+            // TODO: Move this to a script file.
+            // We currently can't call scripts from the repo because
+            // at this point in the workflow, we're on the compiled
+            // artifact branch (so the scripts don't exist).
+            // We can fix this with a composite action in the main repo.
+            // This script is duplicated above.
+            const fs = require('fs');
+            const crypto = require('crypto');
+            const {execSync} = require('child_process');
+
+            // TODO: when we move this to a script, we can use this from npm.
+            // Copy of signedsource since we can't install deps on this branch.
+            const GENERATED = '@' + 'generated';
+            const NEWTOKEN = '<<SignedSource::*O*zOeWoEQle#+L!plEphiEmie@IsG>>';
+            const PATTERN = new RegExp(`${GENERATED} (?:SignedSource<<([a-f0-9]{32})>>)`);
+
+            const TokenNotFoundError = new Error(
+              `SignedSource.signFile(...): Cannot sign file without token: ${NEWTOKEN}`
+            );
+
+            function hash(data, encoding) {
+              const md5sum = crypto.createHash('md5');
+              md5sum.update(data, encoding);
+              return md5sum.digest('hex');
+            }
+
+            const SignedSource = {
+              getSigningToken() {
+                return `${GENERATED} ${NEWTOKEN}`;
+              },
+              isSigned(data) {
+                return PATTERN.exec(data) != null;
+              },
+              signFile(data) {
+                if (!data.includes(NEWTOKEN)) {
+                  if (SignedSource.isSigned(data)) {
+                    // Signing a file that was previously signed.
+                   data = data.replace(PATTERN, SignedSource.getSigningToken());
+                  } else {
+                    throw TokenNotFoundError;
+                  }
+                }
+                return data.replace(NEWTOKEN, `SignedSource<<${hash(data, 'utf8')}>>`);
+              },
+            };
+
+            const directory = './compiled-rn';
+            console.log('Signing files in directory:', directory);
+            try {
+              const result = execSync(`git status --porcelain ${directory}`, {encoding: 'utf8'});
+
+              // Parse the git status output to get file paths
+              const files = result.split('\n').filter(file => file.endsWith('.js'));
+
+              if (files.length === 0) {
+                throw new Error(
+                  'git status returned no files to sign. this job should not have run.'
+                );
+              } else {
+                files.forEach(line => {
+                  const file = line.slice(3).trim();
+                  if (file) {
+                    console.log('  Signing file:', file);
+                    const originalContents = fs.readFileSync(file, 'utf8');
+                    const signedContents = SignedSource.signFile(originalContents);
+                    fs.writeFileSync(file, signedContents, 'utf8');
+                  }
+                });
+              }
+            } catch (e) {
+              process.exitCode = 1;
+              console.error('Error signing files:', e);
+            }
+      - name: Will commit these changes
+        if: steps.check_should_commit.outputs.should_commit == 'true'
+        run: |
           git status -u
       - name: Commit changes to branch
         if: steps.check_should_commit.outputs.should_commit == 'true'
diff --git a/packages/react-native-renderer/src/ReactNativeTypes.js b/packages/react-native-renderer/src/ReactNativeTypes.js
index 1b38ed2ad9608..0b4f9a1045b84 100644
--- a/packages/react-native-renderer/src/ReactNativeTypes.js
+++ b/packages/react-native-renderer/src/ReactNativeTypes.js
@@ -4,7 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow strict
  */
 
diff --git a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/deepDiffer.js b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/deepDiffer.js
index 5e8b3a309f9ca..200668afdfe12 100644
--- a/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/deepDiffer.js
+++ b/packages/react-native-renderer/src/__mocks__/react-native/Libraries/ReactPrivate/deepDiffer.js
@@ -4,8 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
- * @flow
  */
 
 'use strict';
diff --git a/scripts/rollup/packaging.js b/scripts/rollup/packaging.js
index 24b3d79316d4a..7c433fc2dd330 100644
--- a/scripts/rollup/packaging.js
+++ b/scripts/rollup/packaging.js
@@ -7,7 +7,6 @@ const {
   readFileSync,
   writeFileSync,
 } = require('fs');
-const path = require('path');
 const Bundles = require('./bundles');
 const {
   asyncCopyTo,
@@ -15,7 +14,6 @@ const {
   asyncExtractTar,
   asyncRimRaf,
 } = require('./utils');
-const {getSigningToken, signFile} = require('signedsource');
 
 const {
   NODE_ES2015,
@@ -127,24 +125,6 @@ async function copyRNShims() {
     require.resolve('react-native-renderer/src/ReactNativeTypes.js'),
     'build/react-native/shims/ReactNativeTypes.js'
   );
-  processGenerated('build/react-native/shims');
-}
-
-function processGenerated(directory) {
-  const files = readdirSync(directory)
-    .filter(dir => dir.endsWith('.js'))
-    .map(file => path.join(directory, file));
-
-  files.forEach(file => {
-    const originalContents = readFileSync(file, 'utf8');
-    const contents = originalContents
-      // Replace {@}format with {@}noformat
-      .replace(/(\r?\n\s*\*\s*)@format\b.*(\n)/, '$1@noformat$2')
-      // Add {@}nolint and {@}generated
-      .replace(/(\r?\n\s*\*)\//, `$1 @nolint$1 ${getSigningToken()}$1/`);
-    const signedContents = signFile(contents);
-    writeFileSync(file, signedContents, 'utf8');
-  });
 }
 
 async function copyAllShims() {
diff --git a/scripts/rollup/shims/react-native/ReactFabric.js b/scripts/rollup/shims/react-native/ReactFabric.js
index 417c156c2f607..61f6d726887b3 100644
--- a/scripts/rollup/shims/react-native/ReactFabric.js
+++ b/scripts/rollup/shims/react-native/ReactFabric.js
@@ -4,7 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow
  */
 
diff --git a/scripts/rollup/shims/react-native/ReactFeatureFlags.js b/scripts/rollup/shims/react-native/ReactFeatureFlags.js
index ef3595c1f8db7..69e6f48b68a34 100644
--- a/scripts/rollup/shims/react-native/ReactFeatureFlags.js
+++ b/scripts/rollup/shims/react-native/ReactFeatureFlags.js
@@ -4,7 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow strict-local
  */
 
diff --git a/scripts/rollup/shims/react-native/ReactNative.js b/scripts/rollup/shims/react-native/ReactNative.js
index c11b4a3a8e73c..d0297cc9a61cb 100644
--- a/scripts/rollup/shims/react-native/ReactNative.js
+++ b/scripts/rollup/shims/react-native/ReactNative.js
@@ -4,10 +4,10 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow
  */
-
 'use strict';
 
 import type {ReactNativeType} from './ReactNativeTypes';
diff --git a/scripts/rollup/shims/react-native/ReactNativeViewConfigRegistry.js b/scripts/rollup/shims/react-native/ReactNativeViewConfigRegistry.js
index 84a7082ea26e2..98e03187c74a5 100644
--- a/scripts/rollup/shims/react-native/ReactNativeViewConfigRegistry.js
+++ b/scripts/rollup/shims/react-native/ReactNativeViewConfigRegistry.js
@@ -4,7 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow strict-local
  */
 
diff --git a/scripts/rollup/shims/react-native/createReactNativeComponentClass.js b/scripts/rollup/shims/react-native/createReactNativeComponentClass.js
index bbacdc472e46f..388991e45b545 100644
--- a/scripts/rollup/shims/react-native/createReactNativeComponentClass.js
+++ b/scripts/rollup/shims/react-native/createReactNativeComponentClass.js
@@ -4,7 +4,8 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
+ * @noformat
+ * @nolint
  * @flow strict-local
  */
 
diff --git a/scripts/rollup/wrappers.js b/scripts/rollup/wrappers.js
index e76931bb85b42..e01ca30a6d054 100644
--- a/scripts/rollup/wrappers.js
+++ b/scripts/rollup/wrappers.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const {signFile, getSigningToken} = require('signedsource');
 const {bundleTypes, moduleTypes} = require('./bundles');
 
 const {
@@ -392,86 +391,80 @@ ${source}`;
 
   /****************** RN_OSS_DEV ******************/
   [RN_OSS_DEV](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 
   /****************** RN_OSS_PROD ******************/
   [RN_OSS_PROD](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 
   /****************** RN_OSS_PROFILING ******************/
   [RN_OSS_PROFILING](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 
   /****************** RN_FB_DEV ******************/
   [RN_FB_DEV](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 
   /****************** RN_FB_PROD ******************/
   [RN_FB_PROD](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 
   /****************** RN_FB_PROFILING ******************/
   [RN_FB_PROFILING](source, globalName, filename, moduleType) {
-    return signFile(`/**
+    return `/**
 ${license}
  *
  * @noflow
  * @nolint
  * @preventMunge
- * ${getSigningToken()}
  */
 
-${source}`);
+${source}`;
   },
 };