diff --git a/protos/launcher_atom.proto b/protos/launcher_atom.proto
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+/*
+ * Copyright (C) 2020 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.
+ */
+syntax = "proto2";
+
+option java_package = "com.android.launcher3.logger";
+option java_outer_classname = "LauncherAtom";
+
+//
+// ItemInfos
+message ItemInfo {
+  oneof Item {
+    Application application = 1;
+    Task task= 2;
+    Shortcut shortcut = 3;
+    Widget widget = 4;
+  }
+  // When used for launch event, stores the global predictive rank
+  optional int32 rank = 5;
+
+  // Stores whether the Item belows to non primary user
+  optional bool is_work = 6;
+
+  // Item can be child node to parent container or parent containers (nested)
+  oneof Container {
+    WorkspaceContainer workspace = 7;
+    HotseatContainer hotseat = 8;
+    FolderContainer folder = 9;
+  }
+  // Stores the origin of the Item
+  optional Origin source = 10;
+}
+
+enum Origin {
+  UNKNOWN = 0;
+  DEFAULT_LAYOUT = 1;       // icon automatically placed in workspace, folder, hotseat
+  BACKUP_RESTORE = 2;       // icon layout restored from backup
+  PINITEM = 3;              // from another app (e.g., Chrome's "Add to Home screen")
+  ALLAPPS_ATOZ = 4;         // within launcher surface, all aps a-z
+  WIDGETS = 5;              // within launcher, widgets tray
+  ADD_TO_HOMESCREEN = 6;    // play install + launcher home setting
+  ALLAPPS_PREDICTION = 7;   // from prediction bar in all apps container
+  HOTSEAT_PREDICTION = 8;   // from prediction bar in hotseat container
+}
+
+// Main app icons
+message Application {
+  optional string package_name = 1;
+  optional string component_name = 2;
+}
+
+// Legacy shortcuts and shortcuts handled by ShortcutManager
+message Shortcut {
+  optional string shortcut_name = 1;
+}
+
+// AppWidgets handled by AppWidgetManager
+message Widget {
+  optional int32 span_x = 1;
+  optional int32 span_y = 2;
+  optional int32 app_widget_id = 3;
+  optional string package_name = 4; // only populated during snapshot if from workspace
+  optional string component_name = 5; // only populated during snapshot if from workspace
+}
+
+// Tasks handled by PackageManager
+message Task {
+  optional string package_name = 1;
+  optional string component_name = 2;
+  optional int32 index = 3;
+}
+
+//////////////////////////////////////////////
+// Containers
+
+message WorkspaceContainer {
+  optional int32 page_index = 1; // range [-1, l], 0 is the index of the main homescreen
+  optional int32 grid_x = 2;     // [0, m], m varies based on the display density and resolution
+  optional int32 grid_y = 3;     // [0, n], n varies based on the display density and resolution
+}
+
+message HotseatContainer {
+  optional int32 index = 1;
+}
+
+message FolderContainer {
+  optional int32 page_index = 1;
+  optional int32 grid_x = 2;
+  optional int32 grid_y = 3;
+  oneof Container {
+    WorkspaceContainer workspace = 4;
+    HotseatContainer hotseat = 5;
+  }
+}
+
+