diff --git a/multitree/OWNERS b/multitree/OWNERS
new file mode 100644
index 000000000..aa0562f01
--- /dev/null
+++ b/multitree/OWNERS
@@ -0,0 +1,4 @@
+inseob@google.com
+jeongik@google.com
+justinyun@google.com
+kiyoungkim@google.com
diff --git a/multitree/build_vendor.sh b/multitree/build_vendor.sh
new file mode 100755
index 000000000..5ed207ed6
--- /dev/null
+++ b/multitree/build_vendor.sh
@@ -0,0 +1,26 @@
+#!/bin/bash -e
+#
+# Copyright (C) 2022 The Android Open Source Project
+#
+# 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.
+#
+
+export ALLOW_MISSING_DEPENDENCIES=true
+
+build/soong/soong_ui.bash --make-mode vendorimage TARGET_PRODUCT=cf_x86_64_phone TARGET_BUILD_VARIANT=userdebug
+
+mkdir -p $DIST_DIR/soong
+
+for f in out/*.ninja out/soong/build.ninja; do
+  gzip -c $f > $DIST_DIR/${f#out/}.gz
+done