diff --git a/tools/finalization/OWNERS b/tools/finalization/OWNERS
new file mode 100644
index 0000000..518b60d
--- /dev/null
+++ b/tools/finalization/OWNERS
@@ -0,0 +1,5 @@
+include platform/build/soong:/OWNERS
+smoreland@google.com
+alexbuy@google.com
+patb@google.com
+zyy@google.com
diff --git a/tools/finalization/cleanup.sh b/tools/finalization/cleanup.sh
new file mode 100755
index 0000000..cd87b1d
--- /dev/null
+++ b/tools/finalization/cleanup.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+# Brings local repository to a remote head state.
+
+# set -ex
+
+function finalize_revert_local_changes_main() {
+    local top="$(dirname "$0")"/../../../..
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # remove the out folder
+    $m clobber
+
+    repo selfupdate
+
+    repo forall -c '\
+        git checkout . ; git revert --abort ; git clean -fdx ;\
+        git checkout @ ; git branch fina-step1 -D ; git reset --hard; \
+        repo start fina-step1 ; git checkout @ ; git b fina-step1 -D ;'
+}
+
+finalize_revert_local_changes_main
diff --git a/tools/finalization/environment.sh b/tools/finalization/environment.sh
new file mode 100755
index 0000000..2e56bd5
--- /dev/null
+++ b/tools/finalization/environment.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -ex
+
+export FINA_BUG_ID='0'
+
+export FINA_PLATFORM_CODENAME='UpsideDownCake'
+export FINA_PLATFORM_CODENAME_JAVA='UPSIDE_DOWN_CAKE'
+export FINA_PLATFORM_SDK_VERSION='34'
+export FINA_PLATFORM_VERSION='14'
+
+export FINA_BUILD_PREFIX='UP1A'
+
+export FINA_MAINLINE_EXTENSION='6'
+export FINA_MAINLINE_SDK_COMMIT_MESSAGE=''
+export FINA_MAINLINE_SDK_BUILD_ID=0
diff --git a/tools/finalization/finalize-aidl-vndk-sdk-resources.sh b/tools/finalization/finalize-aidl-vndk-sdk-resources.sh
new file mode 100755
index 0000000..1decb6f
--- /dev/null
+++ b/tools/finalization/finalize-aidl-vndk-sdk-resources.sh
@@ -0,0 +1,82 @@
+#!/bin/bash
+
+set -ex
+
+function finalize_aidl_vndk_sdk_resources() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    local SDK_CODENAME="public static final int $FINA_PLATFORM_CODENAME_JAVA = CUR_DEVELOPMENT;"
+    local SDK_VERSION="public static final int $FINA_PLATFORM_CODENAME_JAVA = $FINA_PLATFORM_SDK_VERSION;"
+
+    # default target to modify tree and build SDK
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # This script is WIP and only finalizes part of the Android branch for release.
+    # The full process can be found at (INTERNAL) go/android-sdk-finalization.
+
+    # Update references in the codebase to new API version (TODO)
+    # ...
+
+    # VNDK definitions for new SDK version
+    cp "$top/development/vndk/tools/definition-tool/datasets/vndk-lib-extra-list-current.txt" \
+       "$top/development/vndk/tools/definition-tool/datasets/vndk-lib-extra-list-$FINA_PLATFORM_SDK_VERSION.txt"
+
+    AIDL_TRANSITIVE_FREEZE=true $m aidl-freeze-api create_reference_dumps
+
+    # Generate ABI dumps
+    ANDROID_BUILD_TOP="$top" \
+        out/host/linux-x86/bin/create_reference_dumps \
+        -p aosp_arm64 --build-variant user
+
+    echo "NOTE: THIS INTENTIONALLY MAY FAIL AND REPAIR ITSELF (until 'DONE')"
+    # Update new versions of files. See update-vndk-list.sh (which requires envsetup.sh)
+    $m check-vndk-list || \
+        { cp $top/out/soong/vndk/vndk.libraries.txt $top/build/make/target/product/gsi/current.txt; }
+    echo "DONE: THIS INTENTIONALLY MAY FAIL AND REPAIR ITSELF"
+
+    # Finalize SDK
+
+    # build/make
+    local version_defaults="$top/build/make/core/version_defaults.mk"
+    sed -i -e "s/PLATFORM_SDK_VERSION := .*/PLATFORM_SDK_VERSION := ${FINA_PLATFORM_SDK_VERSION}/g" $version_defaults
+    sed -i -e "s/PLATFORM_VERSION_LAST_STABLE := .*/PLATFORM_VERSION_LAST_STABLE := ${FINA_PLATFORM_VERSION}/g" $version_defaults
+    sed -i -e "s/sepolicy_major_vers := .*/sepolicy_major_vers := ${FINA_PLATFORM_SDK_VERSION}/g" "$top/build/make/core/config.mk"
+    cp "$top/build/make/target/product/gsi/current.txt" "$top/build/make/target/product/gsi/$FINA_PLATFORM_SDK_VERSION.txt"
+
+    # build/soong
+    sed -i -e "/:.*$((${FINA_PLATFORM_SDK_VERSION}-1)),/a \\\t\t\t\"${FINA_PLATFORM_CODENAME}\":     ${FINA_PLATFORM_SDK_VERSION}," "$top/build/soong/android/api_levels.go"
+
+    # cts
+    echo ${FINA_PLATFORM_VERSION} > "$top/cts/tests/tests/os/assets/platform_releases.txt"
+    sed -i -e "s/EXPECTED_SDK = $((${FINA_PLATFORM_SDK_VERSION}-1))/EXPECTED_SDK = ${FINA_PLATFORM_SDK_VERSION}/g" "$top/cts/tests/tests/os/src/android/os/cts/BuildVersionTest.java"
+
+    # libcore
+    sed -i "s%$SDK_CODENAME%$SDK_VERSION%g" "$top/libcore/dalvik/src/main/java/dalvik/annotation/compat/VersionCodes.java"
+
+    # platform_testing
+    local version_codes="$top/platform_testing/libraries/compatibility-common-util/src/com/android/compatibility/common/util/VersionCodes.java"
+    sed -i -e "/=.*$((${FINA_PLATFORM_SDK_VERSION}-1));/a \\    ${SDK_VERSION}" $version_codes
+
+    # Finalize resources
+    "$top/frameworks/base/tools/aapt2/tools/finalize_res.py" \
+           "$top/frameworks/base/core/res/res/values/public-staging.xml" \
+           "$top/frameworks/base/core/res/res/values/public-final.xml"
+
+    # frameworks/base
+    sed -i "s%$SDK_CODENAME%$SDK_VERSION%g" "$top/frameworks/base/core/java/android/os/Build.java"
+    sed -i -e "/=.*$((${FINA_PLATFORM_SDK_VERSION}-1)),/a \\    SDK_${FINA_PLATFORM_CODENAME_JAVA} = ${FINA_PLATFORM_SDK_VERSION}," "$top/frameworks/base/tools/aapt/SdkConstants.h"
+    sed -i -e "/=.*$((${FINA_PLATFORM_SDK_VERSION}-1)),/a \\  SDK_${FINA_PLATFORM_CODENAME_JAVA} = ${FINA_PLATFORM_SDK_VERSION}," "$top/frameworks/base/tools/aapt2/SdkConstants.h"
+
+    # Bump Mainline SDK extension version.
+    "$top/packages/modules/SdkExtensions/gen_sdk/bump_sdk.sh" ${MAINLINE_EXTENSION}
+    local version_defaults="$top/build/make/core/version_defaults.mk"
+    sed -i -e "s/PLATFORM_SDK_EXTENSION_VERSION := .*/PLATFORM_SDK_EXTENSION_VERSION := ${MAINLINE_EXTENSION}/g" $version_defaults
+
+    # Force update current.txt
+    $m clobber
+    $m update-api
+}
+
+finalize_aidl_vndk_sdk_resources
+
diff --git a/tools/finalization/finalize-sdk-rel.sh b/tools/finalization/finalize-sdk-rel.sh
new file mode 100755
index 0000000..203d742
--- /dev/null
+++ b/tools/finalization/finalize-sdk-rel.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+set -ex
+
+function finalize_sdk_rel() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    # default target to modify tree and build SDK
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # adb keys
+    $m adb
+    LOGNAME=android-eng HOSTNAME=google.com "$top/out/host/linux-x86/bin/adb" keygen "$top/vendor/google/security/adb/${FINA_PLATFORM_VERSION}.adb_key"
+
+    # build/make/core/version_defaults.mk
+    sed -i -e "s/PLATFORM_VERSION_CODENAME.${BUILD_PREFIX} := .*/PLATFORM_VERSION_CODENAME.${BUILD_PREFIX} := REL/g" "$top/build/make/core/version_defaults.mk"
+
+    # cts
+    echo "$FINA_PLATFORM_VERSION" > "$top/cts/tests/tests/os/assets/platform_versions.txt"
+    git -C "$top/cts" mv hostsidetests/theme/assets/${FINA_PLATFORM_CODENAME} hostsidetests/theme/assets/${FINA_PLATFORM_SDK_VERSION}
+
+    # system/sepolicy
+    mkdir -p "$top/system/sepolicy/prebuilts/api/${FINA_PLATFORM_SDK_VERSION}.0/"
+    cp -r "$top/system/sepolicy/public/" "$top/system/sepolicy/prebuilts/api/${FINA_PLATFORM_SDK_VERSION}.0/"
+    cp -r "$top/system/sepolicy/private/" "$top/system/sepolicy/prebuilts/api/${FINA_PLATFORM_SDK_VERSION}.0/"
+
+    # prebuilts/abi-dumps/ndk
+    mv "$top/prebuilts/abi-dumps/ndk/current" "$top/prebuilts/abi-dumps/ndk/$FINA_PLATFORM_SDK_VERSION"
+
+    # prebuilts/abi-dumps/vndk
+    mv "$top/prebuilts/abi-dumps/vndk/$FINA_PLATFORM_CODENAME" "$top/prebuilts/abi-dumps/vndk/$FINA_PLATFORM_SDK_VERSION"
+
+    # prebuilts/abi-dumps/platform
+    mv "$top/prebuilts/abi-dumps/platform/current" "$top/prebuilts/abi-dumps/platform/$FINA_PLATFORM_SDK_VERSION"
+}
+
+finalize_sdk_rel
+
diff --git a/tools/finalization/localonly-finalize-mainline-sdk.sh b/tools/finalization/localonly-finalize-mainline-sdk.sh
new file mode 100755
index 0000000..e1c2cb7
--- /dev/null
+++ b/tools/finalization/localonly-finalize-mainline-sdk.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -ex
+
+function finalize_locally_mainline_sdk() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    # Build modules SDKs.
+    TARGET_BUILD_VARIANT=userdebug UNBUNDLED_BUILD_SDKS_FROM_SOURCE=true "$top/vendor/google/build/mainline_modules_sdks.sh"
+
+    # Update prebuilts.
+    "$top/prebuilts/build-tools/path/linux-x86/python3" "$top/packages/modules/common/tools/finalize_sdk.py" -l -b 0 -f ${FINA_MAINLINE_EXTENSION} -r '' 0
+}
+
+finalize_locally_mainline_sdk
+
diff --git a/tools/finalization/step-1.sh b/tools/finalization/step-1.sh
new file mode 100755
index 0000000..ae54d64
--- /dev/null
+++ b/tools/finalization/step-1.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+# Script to perform a 1st step of Android Finalization: API/SDK finalization, create CLs and upload to Gerrit.
+
+set -ex
+
+function commit_step_1_changes() {
+    set +e
+    repo forall -c '\
+        if [[ $(git status --short) ]]; then
+            repo start "$FINA_PLATFORM_CODENAME-SDK-Finalization" ;
+            git add -A . ;
+            git commit -m "$FINA_PLATFORM_CODENAME is now $FINA_PLATFORM_SDK_VERSION" \
+                       -m "Ignore-AOSP-First: $FINA_PLATFORM_CODENAME Finalization
+Bug: $FINA_BUG_ID
+Test: build";
+            repo upload --cbr --no-verify -o nokeycheck -t -y . ;
+            git clean -fdx ; git reset --hard ;
+        fi'
+}
+
+function finalize_step_1_main() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # vndk etc finalization
+    source $top/build/make/tools/finalization/finalize-aidl-vndk-sdk-resources.sh
+
+    # build to confirm everything is OK
+    AIDL_FROZEN_REL=true $m
+
+    # move all changes to finalization branch/topic and upload to gerrit
+    commit_step_1_changes
+}
+
+finalize_step_1_main
diff --git a/tools/finalization/step-2.sh b/tools/finalization/step-2.sh
new file mode 100755
index 0000000..10b752e
--- /dev/null
+++ b/tools/finalization/step-2.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+# Script to perform a 2nd step of Android Finalization: REL finalization, create CLs and upload to Gerrit.
+
+function commit_step_2_changes() {
+    repo forall -c '\
+        if [[ $(git status --short) ]]; then
+            repo start "$FINA_PLATFORM_CODENAME-SDK-Finalization-Rel" ;
+            git add -A . ;
+            git commit -m "$FINA_PLATFORM_CODENAME/$FINA_PLATFORM_SDK_VERSION is now REL" \
+                       -m "Ignore-AOSP-First: $FINA_PLATFORM_CODENAME Finalization
+Bug: $FINA_BUG_ID
+Test: build";
+
+            repo upload --cbr --no-verify -o nokeycheck -t -y . ;
+            git clean -fdx ; git reset --hard ;
+        fi'
+}
+
+function finalize_step_2_main() {
+    local top="$(dirname "$0")"/../../../..
+    source $top/build/make/tools/finalization/environment.sh
+
+    local m="$top/build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=aosp_arm64 TARGET_BUILD_VARIANT=userdebug"
+
+    # vndk etc finalization
+    source $top/build/make/tools/finalization/finalize-aidl-vndk-sdk-resources.sh
+
+    # prebuilts etc
+    source $top/build/make/tools/finalization/finalize-sdk-rel.sh
+
+    # Update prebuilts.
+    "$top/prebuilts/build-tools/path/linux-x86/python3" "$top/packages/modules/common/tools/finalize_sdk.py" -b ${FINA_BUG_ID} -f ${FINA_MAINLINE_EXTENSION} -r "${FINA_MAINLINE_SDK_COMMIT_MESSAGE}" ${FINA_MAINLINE_SDK_BUILD_ID}
+
+    # build to confirm everything is OK
+    AIDL_FROZEN_REL=true $m
+
+    # move all changes to finalization branch/topic and upload to gerrit
+    commit_step_2_changes
+}
+
+finalize_step_2_main