diff --git a/release/flag_declarations/Android.bp b/release/flag_declarations/Android.bp
new file mode 100644
index 00000000..698ec62e
--- /dev/null
+++ b/release/flag_declarations/Android.bp
@@ -0,0 +1,20 @@
+// Copyright 2024 Google Inc. All rights reserved.
+//
+// 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.
+
+build_flag_declarations {
+    name: "build_flags-build-release-calyx",
+    srcs: [
+        "RELEASE_*.textproto",
+    ],
+}
diff --git a/release/flag_declarations/RELEASE_KERNEL_CAIMAN_DIR.textproto b/release/flag_declarations/RELEASE_KERNEL_CAIMAN_DIR.textproto
new file mode 100644
index 00000000..9025e013
--- /dev/null
+++ b/release/flag_declarations/RELEASE_KERNEL_CAIMAN_DIR.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_KERNEL_CAIMAN_DIR"
+namespace: "android_UNKNOWN"
+description: ""
+value: {
+  string_value: ""
+}
+workflow: PREBUILT
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_KERNEL_COMET_DIR.textproto b/release/flag_declarations/RELEASE_KERNEL_COMET_DIR.textproto
new file mode 100644
index 00000000..0b788bdd
--- /dev/null
+++ b/release/flag_declarations/RELEASE_KERNEL_COMET_DIR.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_KERNEL_COMET_DIR"
+namespace: "android_UNKNOWN"
+description: ""
+value: {
+  string_value: ""
+}
+workflow: PREBUILT
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_KERNEL_KOMODO_DIR.textproto b/release/flag_declarations/RELEASE_KERNEL_KOMODO_DIR.textproto
new file mode 100644
index 00000000..33db8f3a
--- /dev/null
+++ b/release/flag_declarations/RELEASE_KERNEL_KOMODO_DIR.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_KERNEL_KOMODO_DIR"
+namespace: "android_UNKNOWN"
+description: ""
+value: {
+  string_value: ""
+}
+workflow: PREBUILT
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_KERNEL_TOKAY_DIR.textproto b/release/flag_declarations/RELEASE_KERNEL_TOKAY_DIR.textproto
new file mode 100644
index 00000000..aaabd6cd
--- /dev/null
+++ b/release/flag_declarations/RELEASE_KERNEL_TOKAY_DIR.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_KERNEL_TOKAY_DIR"
+namespace: "android_UNKNOWN"
+description: ""
+value: {
+  string_value: ""
+}
+workflow: PREBUILT
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL.textproto b/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL.textproto
new file mode 100644
index 00000000..4b4bd837
--- /dev/null
+++ b/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_PIXEL_AIDL_AUDIO_HAL"
+namespace: "android_UNKNOWN"
+description: "Using this flag to control AIDL Audio Hal on Pixel phone."
+value: {
+  bool_value: false
+}
+workflow: LAUNCH
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL_ZUMA.textproto b/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL_ZUMA.textproto
new file mode 100644
index 00000000..4eb36f4c
--- /dev/null
+++ b/release/flag_declarations/RELEASE_PIXEL_AIDL_AUDIO_HAL_ZUMA.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_PIXEL_AIDL_AUDIO_HAL_ZUMA"
+namespace: "android_UNKNOWN"
+description: ""
+value: {
+  bool_value: false
+}
+workflow: LAUNCH
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_PIXEL_AIDL_BATTERY_MITIGATION_HAL.textproto b/release/flag_declarations/RELEASE_PIXEL_AIDL_BATTERY_MITIGATION_HAL.textproto
new file mode 100644
index 00000000..06107d17
--- /dev/null
+++ b/release/flag_declarations/RELEASE_PIXEL_AIDL_BATTERY_MITIGATION_HAL.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_PIXEL_AIDL_BATTERY_MITIGATION_HAL"
+namespace: "android_UNKNOWN"
+description: "Using this flag to control AIDL Battery Mitigation Hal on Pixel phone."
+value: {
+  bool_value: false
+}
+workflow: LAUNCH
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_PIXEL_BROADCAST_ENABLED.textproto b/release/flag_declarations/RELEASE_PIXEL_BROADCAST_ENABLED.textproto
new file mode 100644
index 00000000..4f76429d
--- /dev/null
+++ b/release/flag_declarations/RELEASE_PIXEL_BROADCAST_ENABLED.textproto
@@ -0,0 +1,11 @@
+name: "RELEASE_PIXEL_BROADCAST_ENABLED"
+namespace: "android_UNKNOWN"
+description: "feature flag to enable broadcast feature for Pixel leading phone"
+value: {
+  bool_value: false
+}
+workflow: LAUNCH
+containers: "product"
+containers: "system"
+containers: "system_ext"
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_SVN_CAIMAN.textproto b/release/flag_declarations/RELEASE_SVN_CAIMAN.textproto
new file mode 100644
index 00000000..d9fdd40d
--- /dev/null
+++ b/release/flag_declarations/RELEASE_SVN_CAIMAN.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_SVN_CAIMAN"
+namespace: "android_UNKNOWN"
+description: "Using this flag to set build SVN(Software Version Number) value for CAIMAN under VENDOR"
+value: {
+  string_value: "00"
+}
+workflow: MANUAL
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_SVN_COMET.textproto b/release/flag_declarations/RELEASE_SVN_COMET.textproto
new file mode 100644
index 00000000..1a679298
--- /dev/null
+++ b/release/flag_declarations/RELEASE_SVN_COMET.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_SVN_COMET"
+namespace: "android_UNKNOWN"
+description: "Using this flag to set build SVN(Software Version Number) value for COMET under VENDOR"
+value: {
+  string_value: "00"
+}
+workflow: MANUAL
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_SVN_KOMODO.textproto b/release/flag_declarations/RELEASE_SVN_KOMODO.textproto
new file mode 100644
index 00000000..ca1e297c
--- /dev/null
+++ b/release/flag_declarations/RELEASE_SVN_KOMODO.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_SVN_KOMODO"
+namespace: "android_UNKNOWN"
+description: "Using this flag to set build SVN(Software Version Number) value for KOMODO under VENDOR"
+value: {
+  string_value: "00"
+}
+workflow: MANUAL
+containers: "vendor"
diff --git a/release/flag_declarations/RELEASE_SVN_TOKAY.textproto b/release/flag_declarations/RELEASE_SVN_TOKAY.textproto
new file mode 100644
index 00000000..c62ce12d
--- /dev/null
+++ b/release/flag_declarations/RELEASE_SVN_TOKAY.textproto
@@ -0,0 +1,8 @@
+name: "RELEASE_SVN_TOKAY"
+namespace: "android_UNKNOWN"
+description: "Using this flag to set build SVN(Software Version Number) value for TOKAY under VENDOR"
+value: {
+  string_value: "00"
+}
+workflow: MANUAL
+containers: "vendor"