diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 8675226..0231090 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -101,6 +101,7 @@
     public final float aspectRatio;
 
     public final boolean isScalableGrid;
+    public final boolean isResponsiveGrid;
     private final int mTypeIndex;
 
     /**
@@ -293,6 +294,10 @@
         this.rotationHint = windowBounds.rotationHint;
         mInsets.set(windowBounds.insets);
 
+        // TODO(b/241386436):
+        //  for testing that the flag works only, shouldn't change any launcher behaviour
+        isResponsiveGrid = inv.workspaceSpecsId != INVALID_RESOURCE_HANDLE;
+
         isScalableGrid = inv.isScalable && !isVerticalBarLayout() && !isMultiWindowMode;
         // Determine device posture.
         mInfo = info;
@@ -1577,6 +1582,7 @@
 
         writer.println(prefix + "\taspectRatio:" + aspectRatio);
 
+        writer.println(prefix + "\tisResponsiveGrid:" + isResponsiveGrid);
         writer.println(prefix + "\tisScalableGrid:" + isScalableGrid);
 
         writer.println(prefix + "\tinv.numRows: " + inv.numRows);
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index 3aa582d..376f54d 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -48,6 +48,7 @@
 import androidx.annotation.XmlRes;
 import androidx.core.content.res.ResourcesCompat;
 
+import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.icons.DotRenderer;
 import com.android.launcher3.model.DeviceGridState;
 import com.android.launcher3.provider.RestoreDbTask;
@@ -105,7 +106,7 @@
     static final int INDEX_TWO_PANEL_PORTRAIT = 2;
     static final int INDEX_TWO_PANEL_LANDSCAPE = 3;
 
-    /** These resources are used to override the device profile  */
+    /** These resources are used to override the device profile */
     private static final String RES_GRID_NUM_ROWS = "grid_num_rows";
     private static final String RES_GRID_NUM_COLUMNS = "grid_num_columns";
     private static final String RES_GRID_ICON_SIZE_DP = "grid_icon_size_dp";
@@ -177,6 +178,8 @@
     protected boolean isScalable;
     @XmlRes
     public int devicePaddingId = INVALID_RESOURCE_HANDLE;
+    @XmlRes
+    public int workspaceSpecsId = INVALID_RESOURCE_HANDLE;
 
     public String dbFile;
     public int defaultLayoutId;
@@ -350,6 +353,7 @@
 
         isScalable = closestProfile.isScalable;
         devicePaddingId = closestProfile.devicePaddingId;
+        workspaceSpecsId = closestProfile.mWorkspaceSpecsId;
         this.deviceType = deviceType;
 
         inlineNavButtonsEndSpacing = closestProfile.inlineNavButtonsEndSpacing;
@@ -795,6 +799,7 @@
 
         private final boolean isScalable;
         private final int devicePaddingId;
+        private final int mWorkspaceSpecsId;
 
         public GridOption(Context context, AttributeSet attrs) {
             TypedArray a = context.obtainStyledAttributes(
@@ -836,7 +841,7 @@
 
             inlineNavButtonsEndSpacing =
                     a.getResourceId(R.styleable.GridDisplayOption_inlineNavButtonsEndSpacing,
-                    R.dimen.taskbar_button_margin_default);
+                            R.dimen.taskbar_button_margin_default);
 
             numFolderRows = a.getInt(
                     R.styleable.GridDisplayOption_numFolderRows, numRows);
@@ -856,6 +861,13 @@
             deviceCategory = a.getInt(R.styleable.GridDisplayOption_deviceCategory,
                     DEVICE_CATEGORY_ALL);
 
+            if (FeatureFlags.ENABLE_RESPONSIVE_WORKSPACE.get()) {
+                mWorkspaceSpecsId = a.getResourceId(
+                        R.styleable.GridDisplayOption_workspaceSpecsId, INVALID_RESOURCE_HANDLE);
+            } else {
+                mWorkspaceSpecsId = INVALID_RESOURCE_HANDLE;
+            }
+
             int inlineForRotation = a.getInt(R.styleable.GridDisplayOption_inlineQsb,
                     DONT_INLINE_QSB);
             inlineQsb[INDEX_DEFAULT] =
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index 065122a..ef57953 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -420,6 +420,10 @@
 
     // TODO(Block 32): Empty block
 
+    public static final BooleanFlag ENABLE_RESPONSIVE_WORKSPACE = getDebugFlag(241386436,
+            "ENABLE_RESPONSIVE_WORKSPACE", DISABLED,
+            "Enables new workspace grid calculations method.");
+
     public static class BooleanFlag {
 
         private final boolean mCurrentValue;