diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/coordinator/KeyguardCoordinator.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/coordinator/KeyguardCoordinator.kt
index 1a223c1..933eb20 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/coordinator/KeyguardCoordinator.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/coordinator/KeyguardCoordinator.kt
@@ -18,12 +18,10 @@
 
 package com.android.systemui.statusbar.notification.collection.coordinator
 
-import android.os.SystemProperties
 import android.os.UserHandle
 import android.provider.Settings
 import androidx.annotation.VisibleForTesting
 import com.android.systemui.Dumpable
-import com.android.systemui.Flags.notificationMinimalismPrototype
 import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.dagger.qualifiers.Background
 import com.android.systemui.dump.DumpManager
@@ -41,6 +39,7 @@
 import com.android.systemui.statusbar.notification.collection.provider.SectionHeaderVisibilityProvider
 import com.android.systemui.statusbar.notification.domain.interactor.SeenNotificationsInteractor
 import com.android.systemui.statusbar.notification.interruption.KeyguardNotificationVisibilityProvider
+import com.android.systemui.statusbar.notification.shared.NotificationMinimalismPrototype
 import com.android.systemui.statusbar.policy.HeadsUpManager
 import com.android.systemui.statusbar.policy.headsUpEvents
 import com.android.systemui.util.asIndenting
@@ -264,7 +263,7 @@
     }
 
     private fun unseenFeatureEnabled(): Flow<Boolean> {
-        if (notificationMinimalismPrototype()) {
+        if (NotificationMinimalismPrototype.V1.isEnabled) {
             return flowOf(true)
         }
         return secureSettings
@@ -342,18 +341,6 @@
             var hasFilteredAnyNotifs = false
 
             /**
-             * the [notificationMinimalismPrototype] will now show seen notifications on the locked
-             * shade by default, but this property read allows that to be quickly disabled for
-             * testing
-             */
-            private val minimalismShowOnLockedShade
-                get() =
-                    SystemProperties.getBoolean(
-                        "persist.notification_minimalism_prototype.show_on_locked_shade",
-                        true
-                    )
-
-            /**
              * Encapsulates a definition of "being on the keyguard". Note that these two definitions
              * are wildly different: [StatusBarState.KEYGUARD] is when on the lock screen and does
              * not include shade or occluded states, whereas [KeyguardRepository.isKeyguardShowing]
@@ -364,7 +351,10 @@
              * allow seen notifications to appear in the locked shade.
              */
             private fun isOnKeyguard(): Boolean =
-                if (notificationMinimalismPrototype() && minimalismShowOnLockedShade) {
+                if (
+                    NotificationMinimalismPrototype.V1.isEnabled &&
+                        NotificationMinimalismPrototype.V1.showOnLockedShade
+                ) {
                     statusBarStateController.state == StatusBarState.KEYGUARD
                 } else {
                     keyguardRepository.isKeyguardShowing()
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/NotificationMinimalismPrototype.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/NotificationMinimalismPrototype.kt
new file mode 100644
index 0000000..8889a10
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/NotificationMinimalismPrototype.kt
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+package com.android.systemui.statusbar.notification.shared
+
+import android.os.SystemProperties
+import com.android.systemui.Flags
+import com.android.systemui.flags.FlagToken
+import com.android.systemui.flags.RefactorFlagUtils
+
+/** Helper for reading or using the minimalism prototype flag state. */
+@Suppress("NOTHING_TO_INLINE")
+object NotificationMinimalismPrototype {
+    object V1 {
+        /** The aconfig flag name */
+        const val FLAG_NAME = Flags.FLAG_NOTIFICATION_MINIMALISM_PROTOTYPE
+
+        /** A token used for dependency declaration */
+        val token: FlagToken
+            get() = FlagToken(FLAG_NAME, isEnabled)
+
+        /** Is the heads-up cycling animation enabled */
+        @JvmStatic
+        inline val isEnabled
+            get() = Flags.notificationMinimalismPrototype()
+
+        /**
+         * the prototype will now show seen notifications on the locked shade by default, but this
+         * property read allows that to be quickly disabled for testing
+         */
+        val showOnLockedShade: Boolean
+            get() =
+                if (isUnexpectedlyInLegacyMode()) false
+                else
+                    SystemProperties.getBoolean(
+                        "persist.notification_minimalism_prototype.show_on_locked_shade",
+                        true
+                    )
+
+        /** gets the configurable max number of notifications */
+        val maxNotifs: Int
+            get() =
+                if (isUnexpectedlyInLegacyMode()) -1
+                else
+                    SystemProperties.getInt(
+                        "persist.notification_minimalism_prototype.lock_screen_max_notifs",
+                        1
+                    )
+
+        /**
+         * Called to ensure code is only run when the flag is enabled. This protects users from the
+         * unintended behaviors caused by accidentally running new logic, while also crashing on an
+         * eng build to ensure that the refactor author catches issues in testing.
+         */
+        @JvmStatic
+        inline fun isUnexpectedlyInLegacyMode() =
+            RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, FLAG_NAME)
+
+        /**
+         * Called to ensure code is only run when the flag is disabled. This will throw an exception
+         * if the flag is enabled to ensure that the refactor author catches issues in testing.
+         */
+        @JvmStatic
+        inline fun assertInLegacyMode() = RefactorFlagUtils.assertInLegacyMode(isEnabled, FLAG_NAME)
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackSizeCalculator.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackSizeCalculator.kt
index 5bd4c75..a446745 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackSizeCalculator.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackSizeCalculator.kt
@@ -17,11 +17,9 @@
 package com.android.systemui.statusbar.notification.stack
 
 import android.content.res.Resources
-import android.os.SystemProperties
 import android.util.Log
 import android.view.View.GONE
 import androidx.annotation.VisibleForTesting
-import com.android.systemui.Flags.notificationMinimalismPrototype
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Main
 import com.android.systemui.media.controls.domain.pipeline.MediaDataManager
@@ -31,6 +29,7 @@
 import com.android.systemui.statusbar.SysuiStatusBarStateController
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow
 import com.android.systemui.statusbar.notification.row.ExpandableView
+import com.android.systemui.statusbar.notification.shared.NotificationMinimalismPrototype
 import com.android.systemui.statusbar.policy.SplitShadeStateController
 import com.android.systemui.util.Compile
 import com.android.systemui.util.children
@@ -381,16 +380,13 @@
     fun updateResources() {
         maxKeyguardNotifications =
             infiniteIfNegative(
-                if (notificationMinimalismPrototype()) {
-                    SystemProperties.getInt(
-                        "persist.notification_minimalism_prototype.lock_screen_max_notifs",
-                        1
-                    )
+                if (NotificationMinimalismPrototype.V1.isEnabled) {
+                    NotificationMinimalismPrototype.V1.maxNotifs
                 } else {
                     resources.getInteger(R.integer.keyguard_max_notification_count)
                 }
             )
-        maxNotificationsExcludesMedia = notificationMinimalismPrototype()
+        maxNotificationsExcludesMedia = NotificationMinimalismPrototype.V1.isEnabled
 
         dividerHeight =
             max(1f, resources.getDimensionPixelSize(R.dimen.notification_divider_height).toFloat())