diff --git a/.github/workflows/abtesting.yml b/.github/workflows/abtesting.yml
index 78327c72ca9..5a69d6f17fe 100644
--- a/.github/workflows/abtesting.yml
+++ b/.github/workflows/abtesting.yml
@@ -45,10 +45,9 @@ jobs:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: ABTesting
-      is_legacy: true
-      setup_command: scripts/setup_quickstart.sh abtesting
-      plist_src_path: scripts/gha-encrypted/qs-database.plist.gpg
-      plist_dst_path: quickstart-ios/database/GoogleService-Info.plist
+      setup_command: scripts/setup_quickstart_spm.sh abtesting
+      plist_src_path: scripts/gha-encrypted/qs-abtesting.plist.gpg
+      plist_dst_path: quickstart-ios/abtesting/GoogleService-Info.plist
     secrets:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
 
@@ -66,8 +65,6 @@ jobs:
       with:
         python-version: '3.11'
     - name: Setup quickstart
-      env:
-        LEGACY: true
       run: scripts/setup_quickstart.sh abtesting
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-abtesting.plist.gpg \
@@ -75,8 +72,6 @@ jobs:
     - name: Xcode
       run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
     - name: Build swift quickstart
-      env:
-        LEGACY: true
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_ftl.sh ABTesting)
     - id: ftl_test
       uses: FirebaseExtended/github-actions/firebase-test-lab@v1.4
diff --git a/.github/workflows/auth.yml b/.github/workflows/auth.yml
index 59626a1a4b8..fd9cce9f5be 100644
--- a/.github/workflows/auth.yml
+++ b/.github/workflows/auth.yml
@@ -97,8 +97,7 @@ jobs:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: Authentication
-      is_legacy: false
-      setup_command: scripts/setup_quickstart.sh authentication
+      setup_command: scripts/setup_quickstart_spm.sh authentication
       plist_src_path: scripts/gha-encrypted/qs-authentication.plist.gpg
       plist_dst_path: quickstart-ios/authentication/GoogleService-Info.plist
       run_tests: false
@@ -141,6 +140,5 @@ jobs:
       platforms: '[ "ios", "tvos --skip-tests", "macos --skip-tests", "watchos --skip-tests" ]'
       flags: '[ "--use-static-frameworks" ]'
       setup_command: scripts/configure_test_keychain.sh
-      ignore_deprecation_warnings: true
     secrets:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
diff --git a/.github/workflows/common_quickstart.yml b/.github/workflows/common_quickstart.yml
index 3ced9e62959..ef41a4332ba 100644
--- a/.github/workflows/common_quickstart.yml
+++ b/.github/workflows/common_quickstart.yml
@@ -29,10 +29,11 @@ on:
         type: string
         required: true
 
-      # Whether to test the legacy version of the quickstart.
-      is_legacy:
-        type: boolean
-        required: true
+      # The branch to checkout in the quickstart repo.
+      quickstart_branch:
+        type: string
+        required: false
+        default: 'main'
 
       # The path to the encrypted `GoogleService-Info.plist` file.
       plist_src_path:
@@ -44,14 +45,6 @@ on:
         type: string
         required: true
 
-      # The type of quickstart to test.
-      #
-      # Options: [swift, objc]
-      quickstart_type:
-        type: string
-        required: false
-        default: objc
-
       # Whether to run tests or just build. Defaults to true.
       run_tests:
         type: boolean
@@ -68,15 +61,18 @@ on:
 
 jobs:
   quickstart:
+    name: quickstart (${{ inputs.product }})
     # Run on the main repo's scheduled jobs or pull requests and manual workflow invocations.
     if: (github.repository == 'firebase/firebase-ios-sdk' && github.event_name == 'schedule') || contains(fromJSON('["pull_request", "workflow_dispatch"]'), github.event_name)
     env:
       plist_secret: ${{ secrets.plist_secret }}
-      LEGACY: ${{ inputs.is_legacy && true || '' }}
+      QUICKSTART_BRANCH: ${{ inputs.quickstart_branch }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
+    - name: Prereqs
+      run: gem install xcpretty
     - name: Xcode
       run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
     - name: Run setup command.
@@ -87,17 +83,16 @@ jobs:
             ${{ inputs.plist_src_path }} \
             ${{ inputs.plist_dst_path }} \
             "$plist_secret"
-    - name: Build ${{ inputs.product }} Quickstart (${{ inputs.quickstart_type }} / ${{ inputs.is_legacy && 'Legacy' || 'Non-Legacy' }})
+    - name: Build ${{ inputs.product }} Quickstart
       uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
       with:
         timeout_minutes: 15
         max_attempts: 3
         retry_wait_seconds: 120
         command: |
-          scripts/test_quickstart.sh \
+          SPM=true DIR=${{ inputs.product }} scripts/test_quickstart.sh \
             ${{ inputs.product }} \
-            ${{ inputs.run_tests }} \
-            ${{ inputs.quickstart_type }}
+            ${{ inputs.run_tests }}
     # Failure sequence to upload artifact.
     - id: lowercase_product
       if: failure()
diff --git a/.github/workflows/crashlytics.yml b/.github/workflows/crashlytics.yml
index d3f712b913e..8e074482d08 100644
--- a/.github/workflows/crashlytics.yml
+++ b/.github/workflows/crashlytics.yml
@@ -47,14 +47,7 @@ jobs:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: Crashlytics
-      is_legacy: true
-      quickstart_type: swift
-      setup_command: |
-        scripts/setup_quickstart.sh crashlytics
-        mkdir quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics
-        # Set the deployed pod location of run and upload-symbols with the development pod version.
-        cp Crashlytics/run quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-        cp Crashlytics/upload-symbols quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
+      setup_command: scripts/setup_quickstart_spm.sh crashlytics
       plist_src_path: scripts/gha-encrypted/qs-crashlytics.plist.gpg
       plist_dst_path: quickstart-ios/crashlytics/GoogleService-Info.plist
     secrets:
@@ -77,20 +70,12 @@ jobs:
       run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
     - name: Setup quickstart
       run: scripts/setup_quickstart.sh crashlytics
-      env:
-        LEGACY: true
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-crashlytics.plist.gpg \
           quickstart-ios/crashlytics/GoogleService-Info.plist "$plist_secret"
     - name: Build swift quickstart
       run: |
-        mkdir quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics
-        # Set the deployed pod location of run and upload-symbols with the development pod version.
-        cp Crashlytics/run quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-        cp Crashlytics/upload-symbols quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
         ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_ftl.sh Crashlytics swift)
-      env:
-        LEGACY: true
     - id: ftl_test
       uses: FirebaseExtended/github-actions/firebase-test-lab@v1.4
       with:
diff --git a/.github/workflows/database.yml b/.github/workflows/database.yml
index 04396da47ab..b75ecb9f8a3 100644
--- a/.github/workflows/database.yml
+++ b/.github/workflows/database.yml
@@ -72,16 +72,11 @@ jobs:
 
   quickstart:
     uses: ./.github/workflows/common_quickstart.yml
-    strategy:
-      matrix:
-        quickstart_type: [objc, swift]
     with:
       product: Database
-      is_legacy: false
-      setup_command: scripts/setup_quickstart.sh database
+      setup_command: scripts/setup_quickstart_spm.sh database
       plist_src_path: scripts/gha-encrypted/qs-database.plist.gpg
       plist_dst_path: quickstart-ios/database/GoogleService-Info.plist
-      quickstart_type: ${{ matrix.quickstart_type }}
       run_tests: false
     secrets:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
diff --git a/.github/workflows/firestore.yml b/.github/workflows/firestore.yml
index 548153496f4..4c3e9726425 100644
--- a/.github/workflows/firestore.yml
+++ b/.github/workflows/firestore.yml
@@ -605,8 +605,7 @@ jobs:
   #   uses: ./.github/workflows/common_quickstart.yml
   #   with:
   #     product: Firestore
-  #     is_legacy: true
-  #     setup_command: scripts/setup_quickstart.sh firestore
+  #     setup_command: scripts/setup_quickstart_spm.sh firestore
   #     plist_src_path: scripts/gha-encrypted/qs-firestore.plist.gpg
   #     plist_dst_path: quickstart-ios/firestore/GoogleService-Info.plist
   #     run_tests: false
diff --git a/.github/workflows/functions.yml b/.github/workflows/functions.yml
index 42d7b0c1395..07cafd50e4e 100644
--- a/.github/workflows/functions.yml
+++ b/.github/workflows/functions.yml
@@ -51,23 +51,7 @@ jobs:
     with:
       target: FirebaseFunctionsUnit
 
-  # TODO: The legacy quickstart uses material which doesn't build on Xcode 15.
-  # quickstart:
-  #     uses: ./.github/workflows/common_quickstart.yml
-  #     strategy:
-  #       matrix:
-  #         quickstart_type: [objc, swift]
-  #     with:
-  #       product: Functions
-  #       is_legacy: true
-  #       setup_command: |
-  #         scripts/setup_quickstart.sh functions
-  #         sed -i '' 's/REVERSED_CLIENT_ID/com.googleusercontent.apps.1025801074639-6p6ebi8amuklcjrto20gvpe295smm8u6/' quickstart-ios/functions/LegacyFunctionsQuickstart/FunctionsExample/Info.plist
-  #       plist_src_path: scripts/gha-encrypted/qs-functions.plist.gpg
-  #       plist_dst_path: quickstart-ios/functions/GoogleService-Info.plist
-  #       quickstart_type: ${{ matrix.quickstart_type }}
-  #     secrets:
-  #       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
+  # TODO(ncooke3): Add a Functions quickstart test.
 
   # quickstart-ftl-cron-only:
   #   # Don't run on private repo
diff --git a/.github/workflows/inappmessaging.yml b/.github/workflows/inappmessaging.yml
index d0633743721..b7ace6a847a 100644
--- a/.github/workflows/inappmessaging.yml
+++ b/.github/workflows/inappmessaging.yml
@@ -74,15 +74,11 @@ jobs:
 
   quickstart:
     uses: ./.github/workflows/common_quickstart.yml
-    strategy:
-      matrix:
-        quickstart_type: [objc, swift]
     with:
       product: InAppMessaging
-      is_legacy: false
-      quickstart_type: ${{ matrix.quickstart_type }}
-      setup_command: scripts/setup_quickstart.sh inappmessaging
+      setup_command: scripts/setup_quickstart_spm.sh inappmessaging
       plist_src_path: scripts/gha-encrypted/qs-inappmessaging.plist.gpg
       plist_dst_path: quickstart-ios/inappmessaging/GoogleService-Info.plist
+      run_tests: false
     secrets:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
diff --git a/.github/workflows/installations.yml b/.github/workflows/installations.yml
index ff7fde15883..1d236e40983 100644
--- a/.github/workflows/installations.yml
+++ b/.github/workflows/installations.yml
@@ -51,16 +51,11 @@ jobs:
 
   quickstart:
     uses: ./.github/workflows/common_quickstart.yml
-    strategy:
-      matrix:
-        quickstart_type: [objc, swift]
     with:
       product: Installations
-      is_legacy: false
-      setup_command: scripts/setup_quickstart.sh installations
+      setup_command: scripts/setup_quickstart_spm.sh installations
       plist_src_path: scripts/gha-encrypted/Installations/GoogleService-Info.plist.gpg
       plist_dst_path: quickstart-ios/installations/GoogleService-Info.plist
-      quickstart_type: ${{ matrix.quickstart_type }}
     secrets:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
 
diff --git a/.github/workflows/messaging.yml b/.github/workflows/messaging.yml
index 993cfb543dd..f1ab4cb2f1f 100644
--- a/.github/workflows/messaging.yml
+++ b/.github/workflows/messaging.yml
@@ -83,14 +83,9 @@ jobs:
 
   quickstart:
     uses: ./.github/workflows/common_quickstart.yml
-    strategy:
-      matrix:
-        quickstart_type: [objc, swift]
     with:
       product: Messaging
-      is_legacy: false
-      quickstart_type: ${{ matrix.quickstart_type }}
-      setup_command: scripts/setup_quickstart.sh messaging
+      setup_command: scripts/setup_quickstart_spm.sh messaging
       plist_src_path: scripts/gha-encrypted/qs-messaging.plist.gpg
       plist_dst_path: quickstart-ios/messaging/GoogleService-Info.plist
       run_tests: false
diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index 9d1f35594e6..19a6e044a73 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -78,14 +78,11 @@ jobs:
       #TODO: tests are not supported with Xcode 15 because the test spec depends on the iOS 8 GDCWebServer
       buildonly_platforms: iOS, tvOS
 
-  # TODO: The legacy ObjC quickstarts don't run with Xcode 15, re-able if we get these working.
   quickstart:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: Performance
-      is_legacy: false
-      quickstart_type: swift
-      setup_command: scripts/setup_quickstart.sh performance
+      setup_command: scripts/setup_quickstart_spm.sh performance
       plist_src_path: scripts/gha-encrypted/qs-performance.plist.gpg
       plist_dst_path: quickstart-ios/performance/GoogleService-Info.plist
     secrets:
diff --git a/.github/workflows/prerelease.yml b/.github/workflows/prerelease.yml
new file mode 100644
index 00000000000..e6575f9a614
--- /dev/null
+++ b/.github/workflows/prerelease.yml
@@ -0,0 +1,128 @@
+name: prerelease
+
+permissions:
+  contents: read
+
+on:
+  pull_request:
+    # closed will be triggered when a pull request is merged. This is to keep https://github.com/firebase/SpecsTesting up to date.
+    # types: [closed] # TODO(ncooke3): Uncomment.
+    paths:
+    - '.github/workflows/prerelease.yml'
+  workflow_dispatch:
+  schedule:
+    # Run every day at 10pm (PDT) / 1am (EDT) - cron uses UTC times
+    - cron:  '0 5 * * *'
+
+env:
+  FIREBASE_CI: true
+
+concurrency:
+    group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+    cancel-in-progress: true
+
+jobs:
+  # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
+  #functions_quickstart:
+    # Don't run on private repo unless it is a PR.
+    # if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'workflow_dispatch'
+    # needs: buildup_SpecsTesting_repo
+    # env:
+    #   plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
+    #   botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
+    # # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
+    # runs-on: macos-12
+    # steps:
+    # - uses: actions/checkout@v4
+    # - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
+    # - name: Xcode
+    #   run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
+    # - name: Setup testing repo and quickstart
+    #   run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh functions prerelease_testing
+    # - name: install secret googleservice-info.plist
+    #   run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-functions.plist.gpg \
+    #       quickstart-ios/functions/GoogleService-Info.plist "$plist_secret"
+    # - name: Setup custom URL scheme
+    #   run: sed -i '' 's/REVERSED_CLIENT_ID/com.googleusercontent.apps.1025801074639-6p6ebi8amuklcjrto20gvpe295smm8u6/' quickstart-ios/functions/LegacyFunctionsQuickstart/FunctionsExample/Info.plist
+    # - name: Test objc quickstart
+    #   run: ([ -z $plist_secret ] ||
+    #         scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true)
+    # - name: Test swift quickstart
+    #   run: ([ -z $plist_secret ] ||
+    #         scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true swift)
+    # - name: Remove data before upload
+    #   if: ${{ failure() }}
+    #   run: scripts/remove_data.sh functions
+    # - uses: actions/upload-artifact@v4
+    #   if: ${{ failure() }}
+    #   with:
+    #     name: quickstart_artifacts_functions
+    #     path: quickstart-ios/
+
+  quickstart:
+    # Don't run on private repo unless it is a PR.
+    if: |
+      github.repository == 'firebase/firebase-ios-sdk' &&
+      contains(fromJSON('["schedule", "pull_request", "workflow_dispatch"]'), github.event_name)
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - product: Performance
+            run_tests: true
+          - product: Storage
+            run_tests: false
+          - product: Config
+            run_tests: true
+          - product: Messaging
+            run_tests: false
+          - product: InAppMessaging
+            run_tests: false
+          - product: Firestore
+            run_tests: false
+          - product: Database
+            run_tests: false
+          - product: Authentication
+            run_tests: false
+          - product: Crashlytics
+            run_tests: true
+          - product: ABTesting
+            run_tests: true
+    name: 'quickstart (prerelease, ${{ matrix.product }}, run_tests: ${{ matrix.run_tests }})'
+    env:
+      plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
+      botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
+    runs-on: macos-15
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
+    - name: Prereqs
+      run: gem install xcpretty
+    - name: Xcode
+      run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
+    - name: Setup testing repo and quickstart
+      run: scripts/setup_quickstart_spm.sh ${{ matrix.product }} prerelease_testing
+    - name: Install Secret GoogleService-Info.plist
+      run: |
+        scripts/decrypt_gha_secret.sh \
+          scripts/gha-encrypted/qs-${{ matrix.product }}.plist.gpg \
+          quickstart-ios/${{ matrix.product }}/GoogleService-Info.plist \
+          "$plist_secret"
+    - name: Build Quickstart
+      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
+      with:
+        timeout_minutes: 15
+        max_attempts: 3
+        retry_wait_seconds: 120
+        command: DIR=${{ matrix.product }} scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }}
+    # Failure sequence to upload artifact.
+    - name: Remove data before upload.
+      if: ${{ failure() }}
+      run: scripts/remove_data.sh ${{ matrix.product }}
+    - uses: actions/upload-artifact@v4
+      if: ${{ failure() }}
+      with:
+        name: quickstart_artifacts_${{ matrix.product }}
+        path: |
+          quickstart-ios/
+          !quickstart-ios/**/GoogleService-Info.plist
diff --git a/.github/workflows/prerelease_cocoapods.yml b/.github/workflows/prerelease_cocoapods.yml
index f74adfb6e7d..684716b9c8b 100644
--- a/.github/workflows/prerelease_cocoapods.yml
+++ b/.github/workflows/prerelease_cocoapods.yml
@@ -214,138 +214,3 @@ jobs:
         swift build
         pod repo add --silent "${local_repo}" https://"$botaccess"@github.com/Firebase/SpecsTesting.git
         BOT_TOKEN="${botaccess}" .build/debug/spec-repo-builder --sdk-repo $(pwd) --local-spec-repo-name "${local_repo}" --sdk-repo-name SpecsTesting --github-account Firebase --pod-sources 'https://${BOT_TOKEN}@github.com/Firebase/SpecsTesting' "https://github.com/firebase/SpecsDev.git" "https://github.com/firebase/SpecsStaging.git" "https://cdn.cocoapods.org/" "FirebaseFirestoreTestingSupport" "FirebaseAuthTestingSupport" "FirebaseCombineSwift" --keep-repo --include-pods "${updated_podspecs[@]}"
-
-  # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
-  #functions_quickstart:
-    # Don't run on private repo unless it is a PR.
-    # if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'workflow_dispatch'
-    # needs: buildup_SpecsTesting_repo
-    # env:
-    #   plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-    #   botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-    #   LEGACY: true
-    # # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
-    # runs-on: macos-12
-    # steps:
-    # - uses: actions/checkout@v4
-    # - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
-    # - name: Xcode
-    #   run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
-    # - name: Setup testing repo and quickstart
-    #   run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh functions prerelease_testing
-    # - name: install secret googleservice-info.plist
-    #   run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-functions.plist.gpg \
-    #       quickstart-ios/functions/GoogleService-Info.plist "$plist_secret"
-    # - name: Setup custom URL scheme
-    #   run: sed -i '' 's/REVERSED_CLIENT_ID/com.googleusercontent.apps.1025801074639-6p6ebi8amuklcjrto20gvpe295smm8u6/' quickstart-ios/functions/LegacyFunctionsQuickstart/FunctionsExample/Info.plist
-    # - name: Test objc quickstart
-    #   run: ([ -z $plist_secret ] ||
-    #         scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true)
-    # - name: Test swift quickstart
-    #   run: ([ -z $plist_secret ] ||
-    #         scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true swift)
-    # - name: Remove data before upload
-    #   if: ${{ failure() }}
-    #   run: scripts/remove_data.sh functions
-    # - uses: actions/upload-artifact@v4
-    #   if: ${{ failure() }}
-    #   with:
-    #     name: quickstart_artifacts_functions
-    #     path: quickstart-ios/
-
-  quickstart:
-    # Don't run on private repo unless it is a PR.
-    if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'workflow_dispatch'
-    needs: buildup_SpecsTesting_repo
-    strategy:
-      matrix:
-        include:
-          - product: Performance
-            run_tests: true
-            swift: true
-          - product: Storage
-            is_legacy: true
-            run_tests: true
-            swift: true
-          - product: Config
-            run_tests: true
-            objc: true
-          - product: Messaging
-            run_tests: false
-            swift: true
-            objc: true
-          - product: InAppMessaging
-            run_tests: true
-            swift: true
-            objc: true
-          - product: Firestore
-            run_tests: false
-          - product: Database
-            run_tests: false
-            swift: true
-            objc: true
-          - product: Authentication
-            run_tests: false
-            objc: true
-          - product: Crashlytics
-            is_legacy: true
-            run_tests: true
-            objc: false
-            swift: true
-            setup_command: |
-              mkdir -p quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics
-              # Set the deployed pod location of run and upload-symbols with the development pod version.
-              cp Crashlytics/run quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-              cp Crashlytics/upload-symbols quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-          - product: ABTesting
-            is_legacy: true
-            run_tests: true
-            objc: true
-    env:
-      plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      LEGACY: ${{ matrix.is_legacy && true || '' }}
-    runs-on: macos-15
-    steps:
-    - uses: actions/checkout@v4
-    - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
-    - name: Xcode
-      run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
-    - name: Setup testing repo and quickstart
-      run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh ${{ matrix.product }} prerelease_testing
-    - name: Install Secret GoogleService-Info.plist
-      run: |
-        scripts/decrypt_gha_secret.sh \
-          scripts/gha-encrypted/qs-${{ matrix.product }}.plist.gpg \
-          quickstart-ios/${{ matrix.product }}/GoogleService-Info.plist \
-          "$plist_secret"
-    - name: Run setup command, if needed.
-      if: matrix.setup_command != ''
-      run: ${{ matrix.setup_command }}
-    - name: Build Swift quickstart
-      if: matrix.swift == true
-      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
-      with:
-        timeout_minutes: 15
-        max_attempts: 3
-        retry_wait_seconds: 120
-        command: scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }} swift
-    - name: Build Obj-C quickstart
-      if: matrix.objc == true
-      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
-      with:
-        timeout_minutes: 15
-        max_attempts: 3
-        retry_wait_seconds: 120
-        command: scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }}
-    # Failure sequence to upload artifact.
-    - name: Remove data before upload.
-      if: failure()
-      run: scripts/remove_data.sh ${{ matrix.product }}
-    - uses: actions/upload-artifact@v4
-      if: failure()
-      with:
-        name: quickstart_artifacts_${{ matrix.product }}
-        path: |
-          quickstart-ios/
-          !quickstart-ios/**/GoogleService-Info.plist
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 00000000000..0a3d4842b53
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,123 @@
+name: release
+
+permissions:
+  contents: read
+
+on:
+  pull_request:
+    paths:
+    - '.github/workflows/release.yml'
+    - 'Gemfile*'
+  workflow_dispatch:
+  schedule:
+    # Run every day at 10pm (PDT) / 1am (EDT) - cron uses UTC times
+    - cron:  '0 5 * * *'
+
+env:
+  FIREBASE_CI: true
+  FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: true
+
+concurrency:
+    group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+    cancel-in-progress: true
+
+jobs:
+  # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
+  # functions_quickstart:
+  #   # Don't run on private repo unless it is a PR.
+  #   if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
+  #   needs: buildup_SpecsReleasing_repo
+  #   env:
+  #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
+  #     botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
+  #   runs-on: macos-12
+  #   steps:
+  #   - uses: actions/checkout@v4
+  #   - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
+  #   - name: Setup testing repo and quickstart
+  #     run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh functions nightly_release_testing
+  #   - name: install secret googleservice-info.plist
+  #     run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-functions.plist.gpg \
+  #         quickstart-ios/functions/GoogleService-Info.plist "$plist_secret"
+  #   - name: Setup custom URL scheme
+  #     run: sed -i '' 's/REVERSED_CLIENT_ID/com.googleusercontent.apps.1025801074639-6p6ebi8amuklcjrto20gvpe295smm8u6/' quickstart-ios/functions/LegacyFunctionsQuickstart/FunctionsExample/Info.plist
+  #   - name: Test objc quickstart
+  #     run: ([ -z $plist_secret ] ||
+  #           scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true)
+  #   - name: Test swift quickstart
+  #     run: ([ -z $plist_secret ] ||
+  #           scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true swift)
+  #   - name: Remove data before upload
+  #     if: ${{ failure() }}
+  #     run: scripts/remove_data.sh functions
+  #   - uses: actions/upload-artifact@v4
+  #     if: ${{ failure() }}
+  #     with:
+  #       name: quickstart_artifacts_functions
+  #       path: quickstart-ios/
+
+  quickstart:
+    if: |
+      github.repository == 'firebase/firebase-ios-sdk' &&
+      contains(fromJSON('["schedule", "pull_request", "workflow_dispatch"]'), github.event_name)
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - product: Performance
+            run_tests: true
+          - product: Storage
+            run_tests: false
+          - product: Config
+            run_tests: true
+          - product: Messaging
+            run_tests: false
+          - product: InAppMessaging
+            run_tests: false
+          - product: Firestore
+            run_tests: false
+          - product: Database
+            run_tests: false
+          - product: Authentication
+            run_tests: false
+          - product: Crashlytics
+            run_tests: true
+          - product: ABTesting
+            run_tests: false
+    name: 'quickstart (release, ${{ matrix.product }}, run_tests: ${{ matrix.run_tests }})'
+    env:
+      plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
+      botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
+    runs-on: macos-15
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0 # Required for pulling down repo tags.
+    - name: Set Xcode version
+      run: sudo xcode-select -s /Applications/Xcode_16.4.app
+    - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
+    - name: Prereqs
+      run: gem install xcpretty
+    - name: Setup testing repo and quickstart
+      run: scripts/setup_quickstart_spm.sh ${{ matrix.product }} nightly_release_testing
+    - name: Install Secret GoogleService-Info.plist
+      run: |
+        scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-${{ matrix.product }}.plist.gpg \
+          quickstart-ios/${{ matrix.product }}/GoogleService-Info.plist "$plist_secret"
+    - name: Build Quickstart
+      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
+      with:
+        timeout_minutes: 15
+        max_attempts: 3
+        retry_wait_seconds: 120
+        command: DIR=${{ matrix.product }} scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }}
+    - name: Remove data before upload
+      if: failure()
+      run: scripts/remove_data.sh ${{ matrix.product }}
+    - uses: actions/upload-artifact@v4
+      if: failure()
+      with:
+        name: quickstart_artifacts_${{ matrix.product }}
+        path: |
+          quickstart-ios/
+          !quickstart-ios/**/GoogleService-Info.plist
diff --git a/.github/workflows/release_cocoapods.yml b/.github/workflows/release_cocoapods.yml
index 4ec26a41272..c75b089802c 100644
--- a/.github/workflows/release_cocoapods.yml
+++ b/.github/workflows/release_cocoapods.yml
@@ -152,132 +152,3 @@ jobs:
     - name: Clean Artifacts
       if: ${{ always() }}
       run: pod repo remove "${local_repo}"
-
-  quickstart:
-    # Don't run on private repo unless it is a PR.
-    if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'workflow_dispatch'
-    needs: buildup_SpecsReleasing_repo
-    strategy:
-      matrix:
-        include:
-          - product: Performance
-            run_tests: true
-            swift: true
-          - product: Storage
-            run_tests: true
-            swift: true
-            is_legacy: true
-          - product: Config
-            run_tests: true
-            objc: true
-          - product: Messaging
-            run_tests: false
-            objc: true
-            swift: true
-          - product: InAppMessaging
-            run_tests: true
-            objc: true
-            swift: true
-          - product: Firestore
-            run_tests: false
-            objc: true
-          - product: Database
-            run_tests: false
-            objc: true
-            swift: true
-          - product: Authentication
-            run_tests: false
-            objc: true
-          - product: Crashlytics
-            run_tests: true
-            swift: true
-            is_legacy: true
-            setup_command: |
-              mkdir -p quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics
-              # Set the deployed pod location of run and upload-symbols with the development pod version.
-              cp Crashlytics/run quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-              cp Crashlytics/upload-symbols quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Pods/FirebaseCrashlytics/
-          - product: ABTesting
-            run_tests: true
-            objc: true
-            is_legacy: true
-    env:
-      plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      LEGACY: ${{ matrix.is_legacy && true || '' }}
-    runs-on: macos-15
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set Xcode version
-      run: sudo xcode-select -s /Applications/Xcode_16.4.app
-    - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
-    - name: Setup testing repo and quickstart
-      run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh ${{ matrix.product }} nightly_release_testing
-    - name: Install Secret GoogleService-Info.plist
-      run: |
-        scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-${{ matrix.product }}.plist.gpg \
-          quickstart-ios/${{ matrix.product }}/GoogleService-Info.plist "$plist_secret"
-    - name: Run setup command, if needed.
-      if: matrix.setup_command != ''
-      run: ${{ matrix.setup_command }}
-    - name: Build Obj-C quickstart
-      if: matrix.objc == true
-      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
-      with:
-        timeout_minutes: 15
-        max_attempts: 3
-        retry_wait_seconds: 120
-        command: scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }}
-    - name: Build Swift quickstart
-      if: matrix.swift == true
-      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
-      with:
-        timeout_minutes: 15
-        max_attempts: 3
-        retry_wait_seconds: 120
-        command: scripts/test_quickstart.sh ${{ matrix.product }} ${{ matrix.run_tests }} swift
-    - name: Remove data before upload
-      if: failure()
-      run: scripts/remove_data.sh ${{ matrix.product }}
-    - uses: actions/upload-artifact@v4
-      if: failure()
-      with:
-        name: quickstart_artifacts_${{ matrix.product }}
-        path: |
-          quickstart-ios/
-          !quickstart-ios/**/GoogleService-Info.plist
-
-  # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
-  # functions_quickstart:
-  #   # Don't run on private repo unless it is a PR.
-  #   if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
-  #   needs: buildup_SpecsReleasing_repo
-  #   env:
-  #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-  #     LEGACY: true
-  #   runs-on: macos-12
-  #   steps:
-  #   - uses: actions/checkout@v4
-  #   - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
-  #   - name: Setup testing repo and quickstart
-  #     run: BOT_TOKEN="${botaccess}" scripts/setup_quickstart.sh functions nightly_release_testing
-  #   - name: install secret googleservice-info.plist
-  #     run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-functions.plist.gpg \
-  #         quickstart-ios/functions/GoogleService-Info.plist "$plist_secret"
-  #   - name: Setup custom URL scheme
-  #     run: sed -i '' 's/REVERSED_CLIENT_ID/com.googleusercontent.apps.1025801074639-6p6ebi8amuklcjrto20gvpe295smm8u6/' quickstart-ios/functions/LegacyFunctionsQuickstart/FunctionsExample/Info.plist
-  #   - name: Test objc quickstart
-  #     run: ([ -z $plist_secret ] ||
-  #           scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true)
-  #   - name: Test swift quickstart
-  #     run: ([ -z $plist_secret ] ||
-  #           scripts/third_party/travis/retry.sh scripts/test_quickstart.sh Functions true swift)
-  #   - name: Remove data before upload
-  #     if: ${{ failure() }}
-  #     run: scripts/remove_data.sh functions
-  #   - uses: actions/upload-artifact@v4
-  #     if: ${{ failure() }}
-  #     with:
-  #       name: quickstart_artifacts_functions
-  #       path: quickstart-ios/
diff --git a/.github/workflows/remoteconfig.yml b/.github/workflows/remoteconfig.yml
index 9d6fe55f330..36ba73ed473 100644
--- a/.github/workflows/remoteconfig.yml
+++ b/.github/workflows/remoteconfig.yml
@@ -94,8 +94,7 @@ jobs:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: Config
-      is_legacy: false
-      setup_command: scripts/setup_quickstart.sh config
+      setup_command: scripts/setup_quickstart_spm.sh config
       plist_src_path: scripts/gha-encrypted/qs-config.plist.gpg
       plist_dst_path: quickstart-ios/config/GoogleService-Info.plist
     secrets:
diff --git a/.github/workflows/storage.yml b/.github/workflows/storage.yml
index 12bbb9bf86d..9aae03de131 100644
--- a/.github/workflows/storage.yml
+++ b/.github/workflows/storage.yml
@@ -83,9 +83,7 @@ jobs:
     uses: ./.github/workflows/common_quickstart.yml
     with:
       product: Storage
-      quickstart_type: swift
-      is_legacy: true
-      setup_command: scripts/setup_quickstart.sh storage
+      setup_command: scripts/setup_quickstart_spm.sh storage
       plist_src_path: scripts/gha-encrypted/qs-storage.plist.gpg
       plist_dst_path: quickstart-ios/storage/GoogleService-Info.plist
       run_tests: false
@@ -97,7 +95,6 @@ jobs:
     if: github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      LEGACY: true
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/zip.yml b/.github/workflows/zip.yml
index d698a01a20a..db5055fb93e 100644
--- a/.github/workflows/zip.yml
+++ b/.github/workflows/zip.yml
@@ -231,8 +231,6 @@ jobs:
         mkdir -p "${HOME}"/ios_frameworks/
         find "${GITHUB_WORKSPACE}" -name "Firebase*latest.zip" -exec unzip -d "${HOME}"/ios_frameworks/ {} +
     - name: Setup quickstart
-      env:
-        LEGACY: true
       run: SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseRemoteConfig/* \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/FirebaseCore.xcframework \
@@ -244,8 +242,6 @@ jobs:
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-abtesting.plist.gpg \
         quickstart-ios/abtesting/GoogleService-Info.plist "$plist_secret"
     - name: Test Quickstart
-      env:
-        LEGACY: true
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
     - uses: actions/upload-artifact@v4
       if: failure()
@@ -384,29 +380,23 @@ jobs:
         mkdir -p "${HOME}"/ios_frameworks/
         find "${GITHUB_WORKSPACE}" -name "Firebase*latest.zip" -exec unzip -d "${HOME}"/ios_frameworks/ {} +
     - name: Setup quickstart
-      env:
-        LEGACY: true
       run: |
-              SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
-                                               "${HOME}"/ios_frameworks/Firebase/FirebaseCrashlytics/* \
-                                               "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/*
-              cp quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Firebase/run quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart
-              cp quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/Firebase/upload-symbols quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart
-              chmod +x quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/run
-              chmod +x quickstart-ios/crashlytics/LegacyCrashlyticsQuickstart/upload-symbols
-    # TODO(#8057): Restore Swift Quickstart
-    # - name: Setup swift quickstart
-    #   env:
-    #     LEGACY: true
-    #   run: |
-    #           SAMPLE="$SDK" TARGET="${SDK}ExampleSwift" NON_FIREBASE_SDKS="ReachabilitySwift" scripts/setup_quickstart_framework.sh \
-    #                                            "${HOME}"/ios_frameworks/Firebase/NonFirebaseSDKs/*
+        rm -rf "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/FirebaseAnalytics*
+        rm -rf "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/GoogleAppMeasurement*
+        rm -rf "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/GoogleAds*
+        SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
+          "${HOME}"/ios_frameworks/Firebase/FirebaseCrashlytics/* \
+          "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/*
+    - name: Add frameworks to Crashlytics watchOS target
+      run: |
+        cd quickstart-ios/crashlytics
+        "${GITHUB_WORKSPACE}"/quickstart-ios/scripts/add_framework_script.rb --sdk "Crashlytics" --target "CrashlyticsExample_(watchOS)_Extension" --framework_path Firebase/
+    - name: Patch Crashlytics Run Script Path
+      run: scripts/patch_crashlytics_run_path.rb
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-crashlytics.plist.gpg \
         quickstart-ios/crashlytics/GoogleService-Info.plist "$plist_secret"
     - name: Test Quickstart
-      env:
-        LEGACY: true
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
     - uses: actions/upload-artifact@v4
       if: failure()
@@ -467,8 +457,8 @@ jobs:
           !quickstart-ios/**/GoogleService-Info.plist
 
   quickstart_framework_firebaseai:
-    needs: package-head
-    if: ${{ !cancelled() && (success() || github.event.inputs.zip_run_id != '') }}
+    needs: packaging_done
+    if: ${{ !cancelled() }}
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "FirebaseAI"
@@ -487,7 +477,7 @@ jobs:
       uses: actions/download-artifact@v4.1.7
       with:
         name: ${{ matrix.artifact }}
-        run-id: ${{ github.event.inputs.zip_run_id || github.run_id }}
+        run-id: ${{ needs.packaging_done.outputs.run_id }}
         github-token: ${{ secrets.GITHUB_TOKEN }}
     - uses: ruby/setup-ruby@354a1ad156761f5ee2b7b13fa8e09943a5e8d252 # v1
     - name: Xcode
@@ -609,15 +599,11 @@ jobs:
       run: SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseInAppMessaging/* \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/*
-    - name: Setup swift quickstart
-      run: SAMPLE="$SDK" TARGET="${SDK}ExampleSwift" scripts/setup_quickstart_framework.sh
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-inappmessaging.plist.gpg \
         quickstart-ios/inappmessaging/GoogleService-Info.plist "$plist_secret"
-    - name: Test Quickstart
-      run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
     - name: Test Swift Quickstart
-      run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}" swift)
+      run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
     - uses: actions/upload-artifact@v4
       if: failure()
       with:
@@ -660,19 +646,15 @@ jobs:
       run: SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseMessaging/* \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/*
-    - name: Setup swift quickstart
-      run: SAMPLE="$SDK" TARGET="${SDK}ExampleSwift" scripts/setup_quickstart_framework.sh
-    - name: Add frameworks to Crashlytics watchOS target
+    - name: Add frameworks to notification extension target
       run: |
         cd quickstart-ios/messaging
-        "${GITHUB_WORKSPACE}"/quickstart-ios/scripts/add_framework_script.rb --sdk Messaging --target NotificationServiceExtension --framework_path Firebase/
+        "${GITHUB_WORKSPACE}"/quickstart-ios/scripts/add_framework_script.rb --sdk "Messaging" --target "NotificationServiceExtension" --framework_path Firebase/
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-messaging.plist.gpg \
         quickstart-ios/messaging/GoogleService-Info.plist "$plist_secret"
     - name: Test Quickstart
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
-    - name: Test Swift Quickstart
-      run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}" swift)
     - uses: actions/upload-artifact@v4
       if: failure()
       with:
@@ -712,31 +694,19 @@ jobs:
         mkdir -p "${HOME}"/ios_frameworks/
         find "${GITHUB_WORKSPACE}" -name "Firebase*latest.zip" -exec unzip -d "${HOME}"/ios_frameworks/ {} +
     - name: Setup quickstart
-      env:
-        LEGACY: true
       run: SAMPLE="$SDK" TARGET="${SDK}Example" scripts/setup_quickstart_framework.sh \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseStorage/* \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseAuth/* \
                                                "${HOME}"/ios_frameworks/Firebase/FirebaseAnalytics/*
-    - name: Setup swift quickstart
-      env:
-        LEGACY: true
-      run: SAMPLE="$SDK" TARGET="${SDK}ExampleSwift" scripts/setup_quickstart_framework.sh
     - name: Install Secret GoogleService-Info.plist
       run: scripts/decrypt_gha_secret.sh scripts/gha-encrypted/qs-storage.plist.gpg \
         quickstart-ios/storage/GoogleService-Info.plist "$plist_secret"
     - name: Test Quickstart
-      env:
-        LEGACY: true
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}")
-    - name: Test Swift Quickstart
-      env:
-        LEGACY: true
-      run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/test_quickstart_framework.sh "${SDK}" swift)
     - uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: quickstart_artifacts_storage_${{ matrix.artifact }}
         path: |
           quickstart-ios/
-          !quickstart-ios/**/GoogleService-Info.plist
\ No newline at end of file
+          !quickstart-ios/**/GoogleService-Info.plist
diff --git a/scripts/check_secrets.sh b/scripts/check_secrets.sh
index 4db1540f00c..ea289feb4b4 100755
--- a/scripts/check_secrets.sh
+++ b/scripts/check_secrets.sh
@@ -17,7 +17,6 @@
 
 # Check if secrets are available for multiple CI's
 
-set -x
 echo "GITHUB_BASE_REF: ${GITHUB_BASE_REF:-}"
 echo "GITHUB_HEAD_REF: ${GITHUB_HEAD_REF:-}"
 
diff --git a/scripts/patch_crashlytics_run_path.rb b/scripts/patch_crashlytics_run_path.rb
new file mode 100755
index 00000000000..0af96faed0b
--- /dev/null
+++ b/scripts/patch_crashlytics_run_path.rb
@@ -0,0 +1,41 @@
+#!/usr/bin/env ruby
+
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'xcodeproj'
+
+# This script patches the Crashlytics Quickstart's Xcode project to fix the
+# path to the `run` script for XCFramework-based builds.
+#
+# The default project assumes an SPM dependency. This script changes the path
+# to point to the location where the `run` script is placed in the zip
+# distribution test environment.
+
+project_path = 'quickstart-ios/crashlytics/CrashlyticsExample.xcodeproj'
+project = Xcodeproj::Project.open(project_path)
+new_path = '"${SRCROOT}/Firebase/run"'
+
+project.targets.each do |target|
+  target.build_phases.each do |phase|
+    if phase.is_a?(Xcodeproj::Project::Object::PBXShellScriptBuildPhase) && phase.name == 'Run Script'
+      if phase.shell_script.include?('SourcePackages/checkouts/firebase-ios-sdk/Crashlytics/run')
+        puts "Patching Run Script phase in target '#{target.name}' to: #{new_path}"
+        phase.shell_script = new_path
+      end
+    end
+  end
+end
+
+project.save
diff --git a/scripts/remove_data.sh b/scripts/remove_data.sh
index 04dcf25ae8f..eb6832b3916 100755
--- a/scripts/remove_data.sh
+++ b/scripts/remove_data.sh
@@ -16,10 +16,20 @@ set -xe
 
 SDK="$1"
 
+if [[ -z "$SDK" ]]; then
+  echo "Error: SDK name not provided." >&2
+  echo "Usage: $0 <SDKName>" >&2
+  exit 1
+fi
+
 DIR="${SDK}"
 
-if [[ ! -z "$LEGACY" ]]; then
-  DIR="${SDK}/Legacy${SDK}Quickstart"
+TARGET_DIR="quickstart-ios/${DIR}"
+
+if [[ ! -d "$TARGET_DIR" ]]; then
+  echo "Error: Directory '$TARGET_DIR' not found." >&2
+  echo "Please provide a valid SDK name." >&2
+  exit 1
 fi
 
-rm -f quickstart-ios/"${DIR}"/GoogleService-Info.plist
+rm -f "${TARGET_DIR}"/GoogleService-Info.plist
diff --git a/scripts/remove_spm_dependencies.rb b/scripts/remove_spm_dependencies.rb
new file mode 100755
index 00000000000..ff229655e0b
--- /dev/null
+++ b/scripts/remove_spm_dependencies.rb
@@ -0,0 +1,177 @@
+#!/usr/bin/env ruby
+
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may
+# obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'xcodeproj'
+require 'set'
+
+# This script removes Swift Package Manager dependencies from an Xcode project.
+# It can remove all dependencies or a specified list of dependencies.
+# It's designed to be used in CI to prepare a project for framework-based testing.
+
+# --- Argument Parsing ---
+unless ARGV.length >= 1
+  puts "Usage: #{$0} <path_to.xcodeproj> [dependency_name_1 dependency_name_2 ...]"
+  puts "If no dependency names are provided, all SPM dependencies will be removed."
+  exit 1
+end
+
+project_path = ARGV[0]
+# If more than one argument is provided, treat the rest as a list of dependencies to remove.
+# Otherwise, deps_to_remove_names will be nil, signaling that all dependencies should be removed.
+deps_to_remove_names = ARGV.length > 1 ? ARGV[1..-1].to_set : nil
+
+
+# --- Main Logic ---
+begin
+  project = Xcodeproj::Project.open(project_path)
+rescue => e
+  puts "Error opening project at #{project_path}: #{e.message}"
+  exit 1
+end
+
+puts "Opened project: #{project.path}"
+
+# --- Step 1: Find all SPM product dependencies ---
+all_package_product_dependencies = project.objects.select do |obj|
+  obj.is_a?(Xcodeproj::Project::Object::XCSwiftPackageProductDependency)
+end
+
+if all_package_product_dependencies.empty?
+  puts "No SPM product dependencies found in the project."
+  # Still, try to clean up package references if they exist.
+  unless project.root_object.package_references.empty?
+    puts "Removing #{project.root_object.package_references.count} orphaned package reference(s)..."
+    project.root_object.package_references.clear
+    project.save
+    puts "Project saved."
+  end
+  exit 0
+end
+
+# --- Step 2: Determine which dependencies to remove and which to keep ---
+dependencies_to_remove = []
+dependencies_to_keep = []
+
+if deps_to_remove_names
+  puts "Attempting to remove specific dependencies: #{deps_to_remove_names.to_a.join(', ')}"
+  all_package_product_dependencies.each do |dep|
+    if deps_to_remove_names.include?(dep.product_name)
+      dependencies_to_remove << dep
+    else
+      dependencies_to_keep << dep
+    end
+  end
+
+  found_dep_names = dependencies_to_remove.map(&:product_name).to_set
+  not_found = deps_to_remove_names - found_dep_names
+  unless not_found.empty?
+    puts "Warning: The following specified dependencies were not found: #{not_found.to_a.join(', ')}"
+  end
+else
+  puts "No specific dependencies provided. Removing all #{all_package_product_dependencies.count} SPM dependencies."
+  dependencies_to_remove = all_package_product_dependencies
+  # dependencies_to_keep remains empty
+end
+
+if dependencies_to_remove.empty?
+  puts "No SPM product dependencies to remove."
+  exit 0
+end
+
+# --- Step 3: Remove dependencies and their references ---
+puts "Found #{dependencies_to_remove.count} SPM product dependencies to remove. Removing all references..."
+package_product_dep_uuids = dependencies_to_remove.map(&:uuid).to_set
+
+# Find all BuildFile objects that reference these SPM products
+build_files_to_remove = project.objects.select do |obj|
+  obj.is_a?(Xcodeproj::Project::Object::PBXBuildFile) &&
+  obj.product_ref &&
+  package_product_dep_uuids.include?(obj.product_ref.uuid)
+end
+build_file_uuids_to_remove = build_files_to_remove.map(&:uuid).to_set
+
+# Remove references from all targets
+project.targets.each do |target|
+  puts "Cleaning target '#{target.name}'..."
+
+  # Remove from target dependencies list
+  removed_deps = target.dependencies.reject! do |dep|
+    package_product_dep_uuids.include?(dep.uuid)
+  end
+  if removed_deps
+    puts "  - Removed #{removed_deps.count} SPM target dependencies."
+  end
+
+  # Remove from build phases (e.g., "Link Binary With Libraries")
+  target.build_phases.each do |phase|
+    next unless phase.respond_to?(:files)
+
+    original_file_count = phase.files.count
+    phase.files.reject! do |build_file|
+      build_file_uuids_to_remove.include?(build_file.uuid)
+    end
+    removed_count = original_file_count - phase.files.count
+    if removed_count > 0
+      puts "  - Removed #{removed_count} SPM build file references from '#{phase.display_name}'."
+    end
+  end
+end
+
+# Delete the now-orphaned BuildFile and dependency objects
+puts "Deleting #{build_files_to_remove.count} SPM BuildFile object(s)..."
+build_files_to_remove.each(&:remove_from_project)
+
+puts "Deleting #{dependencies_to_remove.count} SPM product dependency object(s)..."
+dependencies_to_remove.each(&:remove_from_project)
+
+
+# --- Step 4: Remove package references from the project root ---
+if deps_to_remove_names
+  # If we are removing a subset of dependencies, only remove package references
+  # if no other products from that package are being used.
+  packages_to_keep = dependencies_to_keep.map(&:package).compact.to_set
+
+  original_count = project.root_object.package_references.count
+  project.root_object.package_references.reject! do |ref|
+    !packages_to_keep.include?(ref)
+  end
+  removed_count = original_count - project.root_object.package_references.count
+  if removed_count > 0
+    puts "Removed #{removed_count} package reference(s) that no longer have products in use."
+  else
+    puts "No package references needed to be removed."
+  end
+else
+  # Remove all package references if we are removing all dependencies.
+  unless project.root_object.package_references.empty?
+    puts "Removing #{project.root_object.package_references.count} package reference(s)..."
+    project.root_object.package_references.clear
+    puts "All package references removed from the project."
+  else
+    puts "No package references found in the project."
+  end
+end
+
+
+# --- Step 5: Save the modified project ---
+begin
+  project.save
+  puts "Project saved successfully."
+rescue => e
+  puts "Error saving project: #{e.message}"
+  exit 1
+end
diff --git a/scripts/setup_quickstart_framework.sh b/scripts/setup_quickstart_framework.sh
index 51499ab6efa..d500666ae4f 100755
--- a/scripts/setup_quickstart_framework.sh
+++ b/scripts/setup_quickstart_framework.sh
@@ -21,6 +21,16 @@ fi
 QS_SCRIPTS="${REPO}"/quickstart-ios/scripts
 cd quickstart-ios/"${SAMPLE}"
 
+# Remove all SPM dependencies from the project. This is necessary to prepare
+# the project for framework-based testing.
+if [[ "${SAMPLE}" == "FirebaseAI" ]]; then
+  # For the FirebaseAI quickstart, we only want to remove the Firebase deps.
+  "${REPO}"/scripts/remove_spm_dependencies.rb "${SAMPLE}Example.xcodeproj" FirebaseAI
+else
+  # For other quickstarts, remove all SPM dependencies.
+  "${REPO}"/scripts/remove_spm_dependencies.rb "${SAMPLE}Example.xcodeproj"
+fi
+
 if [[ ! -z "$LEGACY" ]]; then
   cd "Legacy${SAMPLE}Quickstart"
 fi
diff --git a/scripts/setup_quickstart_spm.sh b/scripts/setup_quickstart_spm.sh
new file mode 100755
index 00000000000..faf0224fec8
--- /dev/null
+++ b/scripts/setup_quickstart_spm.sh
@@ -0,0 +1,260 @@
+#!/usr/bin/env bash
+
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Script to run in a CI `before_install` phase to setup a SPM-based
+# quickstart repo so that it can be used for integration testing.
+
+set -euo pipefail
+
+# Define testing mode constants.
+readonly NIGHTLY_RELEASE_TESTING="nightly_release_testing"
+readonly PRERELEASE_TESTING="prerelease_testing"
+
+# All script logic is contained in functions. The main function is called at
+# the end.
+# Global variables:
+#   - readonly constants are defined at the top.
+#   - scripts_dir and root_dir are set after constants.
+
+scripts_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+root_dir="$(dirname "$scripts_dir")"
+
+print_usage() {
+  cat <<EOF
+Usage: $(basename "$0") <sample_name> [testing_mode]
+
+This script sets up a quickstart sample for SPM integration testing.
+
+ARGUMENTS:
+  <sample_name>   The name of the quickstart sample directory
+                  (e.g., "authentication").
+  [testing_mode]  Optional. Specifies the testing mode. Can be one of:
+                  - "${NIGHTLY_RELEASE_TESTING}": Points SPM to the latest
+                    CocoaPods tag.
+                  - "${PRERELEASE_TESTING}": Points SPM to the tip of the main
+                    branch.
+                  - (default): Points SPM to the current commit for PR testing.
+
+ENVIRONMENT VARIABLES:
+  QUICKSTART_REPO: Optional. Path to a local clone of the quickstart-ios repo.
+                   If not set, the script will clone it from GitHub.
+                   Example:
+                   QUICKSTART_REPO=/path/to/quickstart-ios $(basename "$0") authentication
+
+  QUICKSTART_BRANCH: Optional. The branch to checkout in the quickstart repo.
+                     Defaults to the repo's default branch.
+                     Example:
+                     QUICKSTART_BRANCH=my-feature-branch $(basename "$0") authentication
+
+  BYPASS_SECRET_CHECK: Optional. Set to "true" to bypass the CI secret check
+                       for local runs.
+                       Example:
+                       BYPASS_SECRET_CHECK=true $(basename "$0") authentication
+
+  DEBUG: Optional. Set to "true" to enable shell trace mode (`set -x`).
+         Example: DEBUG=true $(basename "$0") authentication
+EOF
+}
+
+# Clones or locates the quickstart repo.
+#
+# Globals:
+#   - QUICKSTART_REPO (read-only)
+# Arguments:
+#   - $1: The name of the sample.
+# Outputs:
+#   - Echoes the absolute path to the quickstart directory.
+setup_quickstart_repo() {
+  local sample_name="$1"
+  local quickstart_dir
+
+  # If QUICKSTART_REPO is set, use it. Otherwise, clone the repo.
+  if [[ -n "${QUICKSTART_REPO:-}" ]]; then
+    # If the user provided a path, it must be a valid directory.
+    if [[ ! -d "${QUICKSTART_REPO}" ]]; then
+      echo "Error: QUICKSTART_REPO is set to '${QUICKSTART_REPO}'," \
+           "but this is not a valid directory." >&2
+      exit 1
+    fi
+    echo "Using local quickstart repository at ${QUICKSTART_REPO}" >&2
+    quickstart_dir="${QUICKSTART_REPO}"
+    if ! (cd "${quickstart_dir}" && \
+          git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
+      echo "Error: QUICKSTART_REPO ('${quickstart_dir}') is not a git" \
+           "repository." >&2
+      exit 1
+    fi
+  else
+    # QUICKSTART_REPO is not set, so clone it.
+    quickstart_dir="quickstart-ios"
+    if [[ -d "${quickstart_dir}" ]]; then
+      echo "Quickstart repository already exists at ${quickstart_dir}" >&2
+    else
+      echo "Cloning quickstart repository into '${quickstart_dir}' directory..." >&2
+      # Do a partial, sparse clone to speed up CI. See
+      # https://github.blog/2020-12-21-get-up-to-speed-with-partial-clone-and-shallow-clone/
+      git clone --filter=blob:none --sparse \
+        https://github.com/firebase/quickstart-ios.git "${quickstart_dir}"
+    fi
+    (
+      cd "${quickstart_dir}"
+      echo "Ensuring sparse checkout is set for ${sample_name}..." >&2
+      # Checkout the sample and scripts directories.
+      git sparse-checkout set "${sample_name}" scripts shared
+    )
+  fi
+
+  # If a branch is specified, check it out.
+  if [[ -n "${QUICKSTART_BRANCH:-}" ]]; then
+    echo "Checking out quickstart branch: ${QUICKSTART_BRANCH}" >&2
+    (
+      cd "${quickstart_dir}"
+      git fetch --quiet
+      git checkout --quiet "${QUICKSTART_BRANCH}"
+    )
+  fi
+
+  # Return the absolute path to the quickstart directory.
+  (cd "$quickstart_dir" && pwd)
+}
+
+# Updates the SPM dependency in the Xcode project based on the testing mode.
+#
+# Globals:
+#   - NIGHTLY_RELEASE_TESTING (read-only)
+#   - PRERELEASE_TESTING (read-only)
+#   - scripts_dir (read-only)
+#   - root_dir (read-only)
+# Arguments:
+#   - $1: The testing mode.
+#   - $2: The absolute path to the .xcodeproj file.
+update_spm_dependency() {
+  local release_testing_mode="$1"
+  local absolute_project_file="$2"
+
+  case "$release_testing_mode" in
+    "${NIGHTLY_RELEASE_TESTING}")
+      # For release testing, find the latest CocoaPods tag.
+      local latest_tag
+      latest_tag=$(git -C "$root_dir" tag -l "CocoaPods-*" --sort=-v:refname |
+        awk '/^CocoaPods-[0-9]+\.[0-9]+\.[0-9]+$/{print; exit}')
+      if [[ -z "$latest_tag" ]]; then
+        echo "Error: Could not find the latest CocoaPods tag." >&2
+        echo "This is often caused by a shallow git clone in a CI environment." >&2
+        echo "If you are running in GitHub Actions, please ensure your checkout" >&2
+        echo "step includes 'fetch-depth: 0' to fetch the full git history." >&2
+        exit 1
+      fi
+      local tag_revision
+      tag_revision=$(git -C "$root_dir" rev-list -n 1 "$latest_tag")
+      echo "Setting SPM dependency to revision for tag ${latest_tag}:" \
+           "${tag_revision}"
+      "$scripts_dir/update_firebase_spm_dependency.sh" \
+        "$absolute_project_file" --revision "$tag_revision"
+      ;;
+
+    "${PRERELEASE_TESTING}")
+      # For prerelease testing, point to the tip of the main branch.
+      echo "Setting SPM dependency to the tip of the main branch."
+      "$scripts_dir/update_firebase_spm_dependency.sh" \
+        "$absolute_project_file" --prerelease
+      ;;
+
+    *)
+      # For PR testing, point to the current commit.
+      local current_revision
+      current_revision=$(git -C "$root_dir" rev-parse HEAD)
+      echo "Setting SPM dependency to current revision: ${current_revision}"
+      "$scripts_dir/update_firebase_spm_dependency.sh" \
+        "$absolute_project_file" --revision "$current_revision"
+      ;;
+  esac
+}
+
+main() {
+  # --- Argument Parsing ---
+  if [[ -z "${1:-}" ]]; then
+    print_usage
+    exit 1
+  fi
+
+  local sample="$1"
+  local release_testing="${2-}"
+
+  # Validate release_testing argument.
+  case "$release_testing" in
+    "" | "${NIGHTLY_RELEASE_TESTING}" | "${PRERELEASE_TESTING}")
+      # This is a valid value (or empty), so do nothing.
+      ;;
+    *)
+      # This is an invalid value.
+      echo "Error: Invalid testing_mode: '${release_testing}'" >&2
+      print_usage
+      exit 1
+      ;;
+  esac
+
+  # --- Environment Setup and Validation ---
+  # Enable trace mode if DEBUG is set to 'true'
+  if [[ "${DEBUG:-false}" == "true" ]]; then
+    set -x
+  fi
+
+  # Source function to check if CI secrets are available.
+  source "$scripts_dir/check_secrets.sh"
+
+  # Some quickstarts may not need a real GoogleService-Info.plist for their
+  # tests. When QUICKSTART_REPO is set (for local runs) or BYPASS_SECRET_CHECK
+  # is true, the secrets check is skipped.
+  if [[ -z "${QUICKSTART_REPO:-}" ]] && \
+     [[ "${BYPASS_SECRET_CHECK:-}" != "true" ]] && \
+     ! check_secrets && \
+     [[ "${sample}" != "installations" ]]; then
+    echo "Skipping quickstart setup: CI secrets are not available."
+    exit 0
+  fi
+
+  # --- Main Logic ---
+  local quickstart_dir
+  quickstart_dir=$(setup_quickstart_repo "$sample")
+
+  local quickstart_project_dir="${quickstart_dir}/${sample}"
+
+  if [[ ! -d "${quickstart_project_dir}" ]]; then
+    echo "Error: Sample directory not found at '${quickstart_project_dir}'" >&2
+    exit 1
+  fi
+
+  # Find the .xcodeproj file within the sample directory.
+  # Fail if there isn't exactly one.
+  # Enable nullglob to ensure the glob expands to an empty list if no files
+  # are found.
+  shopt -s nullglob
+  local project_files=("${quickstart_project_dir}"/*.xcodeproj)
+  # Restore default globbing behavior.
+  shopt -u nullglob
+  if [[ "${#project_files[@]}" -ne 1 ]]; then
+    echo "Error: Expected 1 .xcodeproj file in" \
+         "'${quickstart_project_dir}', but found ${#project_files[@]}." >&2
+    exit 1
+  fi
+  local project_file="${project_files[0]}"
+
+  update_spm_dependency "$release_testing" "$project_file"
+}
+
+# Run the main function with all provided arguments.
+main "$@"
diff --git a/scripts/test_quickstart.sh b/scripts/test_quickstart.sh
index 4db82009d3f..2a3f533fc1d 100755
--- a/scripts/test_quickstart.sh
+++ b/scripts/test_quickstart.sh
@@ -20,17 +20,11 @@ set -xeuo pipefail
 
 sample="$1"
 test="$2"
-language="${3-}"
 
 # Source function to check if CI secrets are available.
 source scripts/check_secrets.sh
 
 if check_secrets; then
   cd quickstart-ios
-  if [ "$language" = "swift" ]; then
-    have_secrets=true SAMPLE="$sample" TEST="$test" SWIFT_SUFFIX="Swift" ./scripts/test.sh
-  else
-    have_secrets=true SAMPLE="$sample" TEST="$test" ./scripts/test.sh
-  fi
-
+  have_secrets=true SAMPLE="$sample" TEST="$test" ./scripts/test.sh
 fi
diff --git a/scripts/update_firebase_spm_dependency.sh b/scripts/update_firebase_spm_dependency.sh
index 7a13e07a3cb..27d54e4658d 100755
--- a/scripts/update_firebase_spm_dependency.sh
+++ b/scripts/update_firebase_spm_dependency.sh
@@ -65,7 +65,7 @@ case "$MODE" in
     REPLACEMENT_REGEX="\1kind = branch;\n\t\t\t\tbranch = \"$VERSION\";\2"
     ;;
   --prerelease)
-    COMMIT_HASH=$(git ls-remote https://github.com/firebase/firebase-ios-sdk.git main | cut -f1)
+    COMMIT_HASH=$(git ls-remote https://github.com/firebase/firebase-ios-sdk.git refs/heads/main | cut -f1)
     if [[ -z "$COMMIT_HASH" ]]; then
         echo "Error: Failed to get remote revision for main branch."
         exit 1
diff --git a/scripts/zip_quickstart_test.sh b/scripts/zip_quickstart_test.sh
index 2771b8eb02a..0a3cc30ec9a 100755
--- a/scripts/zip_quickstart_test.sh
+++ b/scripts/zip_quickstart_test.sh
@@ -42,10 +42,23 @@ else
   device_name="iPhone 16"
 fi
 
+# Define project and scheme names
+PROJECT_NAME="${SAMPLE}Example.xcodeproj"
+SCHEME_NAME="${SAMPLE}Example${SWIFT_SUFFIX}"
+
+# Check if the scheme exists before attempting to build.
+# The `awk` command prints all lines from "Schemes:" to the end of the output.
+if ! xcodebuild -list -project "${PROJECT_NAME}" | awk '/Schemes:/,0' | grep -q "^\s*${SCHEME_NAME}"$; then
+    echo "Error: Scheme '${SCHEME_NAME}' not found in project '${PROJECT_NAME}'."
+    echo "Available schemes from '${PROJECT_NAME}':"
+    xcodebuild -list -project "${PROJECT_NAME}"
+    exit 65
+fi
+
 (
 xcodebuild \
--project ${SAMPLE}Example.xcodeproj \
--scheme  ${SAMPLE}Example${SWIFT_SUFFIX} \
+-project ${PROJECT_NAME} \
+-scheme  ${SCHEME_NAME} \
 -destination "platform=iOS Simulator,name=$device_name" "SWIFT_VERSION=5.3" "OTHER_LDFLAGS=\$(OTHER_LDFLAGS) -ObjC" "FRAMEWORK_SEARCH_PATHS= \$(PROJECT_DIR)/Firebase/" HEADER_SEARCH_PATHS='$(inherited) $(PROJECT_DIR)/Firebase' \
 build \
 ) || EXIT_STATUS=$?