diff --git a/Application/DevLogApp/Sources/App/Assembler/AppLayerAssembler.swift b/Application/DevLogApp/Sources/App/Assembler/AppLayerAssembler.swift
index 8e763f20..12fc5e13 100644
--- a/Application/DevLogApp/Sources/App/Assembler/AppLayerAssembler.swift
+++ b/Application/DevLogApp/Sources/App/Assembler/AppLayerAssembler.swift
@@ -8,7 +8,6 @@
 import DevLogCore
 import DevLogData
 import DevLogDomain
-import DevLogWidgetCore
 
 final class AppLayerAssembler: Assembler {
     func assemble(_ container: any DIContainer) {
diff --git a/Application/DevLogApp/Sources/App/Delegate/AppDelegate.swift b/Application/DevLogApp/Sources/App/Delegate/AppDelegate.swift
index 718a884a..b4024610 100644
--- a/Application/DevLogApp/Sources/App/Delegate/AppDelegate.swift
+++ b/Application/DevLogApp/Sources/App/Delegate/AppDelegate.swift
@@ -8,7 +8,6 @@
 import UIKit
 import DevLogCore
 import DevLogData
-import DevLogWidgetCore
 import GoogleSignIn
 
 class AppDelegate: UIResponder, UIApplicationDelegate {
diff --git a/Application/DevLogApp/Sources/App/DevLogApp.swift b/Application/DevLogApp/Sources/App/DevLogApp.swift
index db923c37..645d183a 100644
--- a/Application/DevLogApp/Sources/App/DevLogApp.swift
+++ b/Application/DevLogApp/Sources/App/DevLogApp.swift
@@ -7,9 +7,9 @@
 
 import SwiftUI
 import DevLogCore
+import DevLogData
 import DevLogDomain
 import DevLogPresentation
-import DevLogWidgetCore
 
 @main
 struct DevLogApp: App {
diff --git a/Application/DevLogCore/Sources/WidgetTodoSnapshot.swift b/Application/DevLogCore/Sources/WidgetTodoSnapshot.swift
new file mode 100644
index 00000000..200e1188
--- /dev/null
+++ b/Application/DevLogCore/Sources/WidgetTodoSnapshot.swift
@@ -0,0 +1,39 @@
+//
+//  WidgetTodoSnapshot.swift
+//  DevLogCore
+//
+//  Created by opfic on 5/18/26.
+//
+
+import Foundation
+
+public struct WidgetTodoSnapshot: Equatable, Sendable {
+    public let id: String
+    public let number: Int?
+    public let title: String
+    public let isPinned: Bool
+    public let createdAt: Date
+    public let completedAt: Date?
+    public let deletedAt: Date?
+    public let dueDate: Date?
+
+    public init(
+        id: String,
+        number: Int?,
+        title: String,
+        isPinned: Bool,
+        createdAt: Date,
+        completedAt: Date?,
+        deletedAt: Date?,
+        dueDate: Date?
+    ) {
+        self.id = id
+        self.number = number
+        self.title = title
+        self.isPinned = isPinned
+        self.createdAt = createdAt
+        self.completedAt = completedAt
+        self.deletedAt = deletedAt
+        self.dueDate = dueDate
+    }
+}
diff --git a/Application/DevLogData/Sources/DTO/TodoDTO.swift b/Application/DevLogData/Sources/DTO/TodoDTO.swift
index f2b8ec0f..218d905f 100644
--- a/Application/DevLogData/Sources/DTO/TodoDTO.swift
+++ b/Application/DevLogData/Sources/DTO/TodoDTO.swift
@@ -101,34 +101,3 @@ public struct TodoResponse {
         self.category = category
     }
 }
-
-public struct WidgetTodoSnapshot: Equatable {
-    public let id: String
-    public let number: Int?
-    public let title: String
-    public let isPinned: Bool
-    public let createdAt: Date
-    public let completedAt: Date?
-    public let deletedAt: Date?
-    public let dueDate: Date?
-
-    public init(
-        id: String,
-        number: Int?,
-        title: String,
-        isPinned: Bool,
-        createdAt: Date,
-        completedAt: Date?,
-        deletedAt: Date?,
-        dueDate: Date?
-    ) {
-        self.id = id
-        self.number = number
-        self.title = title
-        self.isPinned = isPinned
-        self.createdAt = createdAt
-        self.completedAt = completedAt
-        self.deletedAt = deletedAt
-        self.dueDate = dueDate
-    }
-}
diff --git a/Application/DevLogData/Sources/Mapper/TodoMapping.swift b/Application/DevLogData/Sources/Mapper/TodoMapping.swift
index 74123ad2..31e23f7a 100644
--- a/Application/DevLogData/Sources/Mapper/TodoMapping.swift
+++ b/Application/DevLogData/Sources/Mapper/TodoMapping.swift
@@ -5,6 +5,7 @@
 //  Created by 최윤진 on 2/19/26.
 //
 
+import DevLogCore
 import DevLogDomain
 
 public extension TodoRequest {
diff --git a/Widget/DevLogWidgetCore/Sources/Common/WidgetSyncEvent.swift b/Application/DevLogData/Sources/Widget/WidgetSyncEvent.swift
similarity index 69%
rename from Widget/DevLogWidgetCore/Sources/Common/WidgetSyncEvent.swift
rename to Application/DevLogData/Sources/Widget/WidgetSyncEvent.swift
index c9116764..1865a716 100644
--- a/Widget/DevLogWidgetCore/Sources/Common/WidgetSyncEvent.swift
+++ b/Application/DevLogData/Sources/Widget/WidgetSyncEvent.swift
@@ -1,13 +1,10 @@
 //
 //  WidgetSyncEvent.swift
-//  DevLogWidgetCore
+//  DevLogData
 //
 //  Created by opfic on 4/29/26.
 //
 
-import DevLogDomain
-import DevLogData
-
 public enum WidgetSyncEvent: Equatable {
     case syncRequested
 }
diff --git a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBus.swift b/Application/DevLogData/Sources/Widget/WidgetSyncEventBus.swift
similarity index 79%
rename from Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBus.swift
rename to Application/DevLogData/Sources/Widget/WidgetSyncEventBus.swift
index 23aa021f..02cf4977 100644
--- a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBus.swift
+++ b/Application/DevLogData/Sources/Widget/WidgetSyncEventBus.swift
@@ -1,13 +1,11 @@
 //
 //  WidgetSyncEventBus.swift
-//  DevLogWidgetCore
+//  DevLogData
 //
 //  Created by opfic on 4/30/26.
 //
 
 import Combine
-import DevLogDomain
-import DevLogData
 
 public protocol WidgetSyncEventBus {
     func publish(_ event: WidgetSyncEvent)
diff --git a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBusImpl.swift b/Application/DevLogData/Sources/Widget/WidgetSyncEventBusImpl.swift
similarity index 88%
rename from Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBusImpl.swift
rename to Application/DevLogData/Sources/Widget/WidgetSyncEventBusImpl.swift
index 38009879..3031036f 100644
--- a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventBusImpl.swift
+++ b/Application/DevLogData/Sources/Widget/WidgetSyncEventBusImpl.swift
@@ -1,13 +1,11 @@
 //
 //  WidgetSyncEventBusImpl.swift
-//  DevLogWidgetCore
+//  DevLogData
 //
 //  Created by opfic on 4/30/26.
 //
 
 import Combine
-import DevLogDomain
-import DevLogData
 
 public final class WidgetSyncEventBusImpl: WidgetSyncEventBus {
     private let subject = PassthroughSubject<WidgetSyncEvent, Never>()
diff --git a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventHandler.swift b/Application/DevLogData/Sources/Widget/WidgetSyncEventHandler.swift
similarity index 99%
rename from Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventHandler.swift
rename to Application/DevLogData/Sources/Widget/WidgetSyncEventHandler.swift
index 31710430..e23f8990 100644
--- a/Widget/DevLogWidgetCore/Sources/Sync/WidgetSyncEventHandler.swift
+++ b/Application/DevLogData/Sources/Widget/WidgetSyncEventHandler.swift
@@ -1,6 +1,6 @@
 //
 //  WidgetSyncEventHandler.swift
-//  DevLogWidgetCore
+//  DevLogData
 //
 //  Created by opfic on 4/30/26.
 //
@@ -9,7 +9,6 @@ import Combine
 import Foundation
 import DevLogCore
 import DevLogDomain
-import DevLogData
 
 public final class WidgetSyncEventHandler {
     private let repository: TodoRepository
diff --git a/Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventBusTests.swift b/Application/DevLogData/Tests/Widget/WidgetSyncEventBusTests.swift
similarity index 91%
rename from Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventBusTests.swift
rename to Application/DevLogData/Tests/Widget/WidgetSyncEventBusTests.swift
index d3ae240a..b85610f9 100644
--- a/Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventBusTests.swift
+++ b/Application/DevLogData/Tests/Widget/WidgetSyncEventBusTests.swift
@@ -1,13 +1,13 @@
 //
 //  WidgetSyncEventBusTests.swift
-//  DevLogWidgetCoreTests
+//  DevLogDataTests
 //
 //  Created by opfic on 4/30/26.
 //
 
 import Combine
 import Testing
-@testable import DevLogWidgetCore
+@testable import DevLogData
 
 struct WidgetSyncEventBusTests {
     @Test("WidgetSyncEventBus는 발행된 이벤트를 관찰자에게 전달한다")
diff --git a/Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventHandlerTests.swift b/Application/DevLogData/Tests/Widget/WidgetSyncEventHandlerTests.swift
similarity index 99%
rename from Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventHandlerTests.swift
rename to Application/DevLogData/Tests/Widget/WidgetSyncEventHandlerTests.swift
index 22f48382..7171bce4 100644
--- a/Widget/DevLogWidgetCore/Tests/Sync/WidgetSyncEventHandlerTests.swift
+++ b/Application/DevLogData/Tests/Widget/WidgetSyncEventHandlerTests.swift
@@ -1,6 +1,6 @@
 //
 //  WidgetSyncEventHandlerTests.swift
-//  DevLogWidgetCoreTests
+//  DevLogDataTests
 //
 //  Created by opfic on 4/30/26.
 //
@@ -8,9 +8,8 @@
 import Foundation
 import Testing
 import DevLogCore
-import DevLogData
 import DevLogDomain
-@testable import DevLogWidgetCore
+@testable import DevLogData
 
 struct WidgetSyncEventHandlerTests {
     @Test("위젯 동기화 요청 이벤트는 Today와 Heatmap 스냅샷을 갱신한다")
diff --git a/Widget/DevLogWidgetCore/Tests/Common/WidgetSyncEventTests.swift b/Application/DevLogData/Tests/Widget/WidgetSyncEventTests.swift
similarity index 85%
rename from Widget/DevLogWidgetCore/Tests/Common/WidgetSyncEventTests.swift
rename to Application/DevLogData/Tests/Widget/WidgetSyncEventTests.swift
index 9a7e9a09..d97cb847 100644
--- a/Widget/DevLogWidgetCore/Tests/Common/WidgetSyncEventTests.swift
+++ b/Application/DevLogData/Tests/Widget/WidgetSyncEventTests.swift
@@ -1,13 +1,13 @@
 //
 //  WidgetSyncEventTests.swift
-//  DevLogWidgetCoreTests
+//  DevLogDataTests
 //
 //  Created by opfic on 4/29/26.
 //
 
 import Foundation
 import Testing
-@testable import DevLogWidgetCore
+@testable import DevLogData
 
 struct WidgetSyncEventTests {
     @Test("위젯 동기화 이벤트는 동기화 요청만 표현한다")
diff --git a/Application/DevLogPersistence/Sources/Persistence/WidgetSnapshotPreferenceStoreImpl.swift b/Application/DevLogPersistence/Sources/Widget/WidgetSnapshotPreferenceStoreImpl.swift
similarity index 100%
rename from Application/DevLogPersistence/Sources/Persistence/WidgetSnapshotPreferenceStoreImpl.swift
rename to Application/DevLogPersistence/Sources/Widget/WidgetSnapshotPreferenceStoreImpl.swift
diff --git a/Application/DevLogPersistence/Sources/Persistence/WidgetSnapshotUpdaterImpl.swift b/Application/DevLogPersistence/Sources/Widget/WidgetSnapshotUpdaterImpl.swift
similarity index 100%
rename from Application/DevLogPersistence/Sources/Persistence/WidgetSnapshotUpdaterImpl.swift
rename to Application/DevLogPersistence/Sources/Widget/WidgetSnapshotUpdaterImpl.swift
diff --git a/Widget/DevLogWidgetCore/DevLogWidgetCore.xcodeproj/project.pbxproj b/Widget/DevLogWidgetCore/DevLogWidgetCore.xcodeproj/project.pbxproj
index 28770b79..22223393 100644
--- a/Widget/DevLogWidgetCore/DevLogWidgetCore.xcodeproj/project.pbxproj
+++ b/Widget/DevLogWidgetCore/DevLogWidgetCore.xcodeproj/project.pbxproj
@@ -8,13 +8,9 @@
 
 /* Begin PBXBuildFile section */
 		75C99AB35C6DF930E824185E /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FBD260F923A87C1577DBFF0F /* Foundation.framework */; };
-		7E979130578F4839B3C640C1 /* DevLogData.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7C18996E00A69C4BCB0F63AE /* DevLogData.framework */; };
-		80423C5F6B880409E39FD20F /* DevLogData.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7C18996E00A69C4BCB0F63AE /* DevLogData.framework */; };
 		8EF4007864D24A1F9074C80A /* DevLogWidgetCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6AF1B307A7E7CC03AA2BABB1 /* DevLogWidgetCore.framework */; };
-		A1DEB84CF3B18EC2005382C5 /* DevLogDomain.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B108898FD3650BE0C116BD3C /* DevLogDomain.framework */; };
 		B11111111111111111111111 /* DevLogCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B55555555555555555555555 /* DevLogCore.framework */; };
 		B69F5362A64E4C8FAA88393A /* DevLogCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B55555555555555555555555 /* DevLogCore.framework */; };
-		CE64C1569E684FD7BF6E21E7 /* DevLogDomain.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B108898FD3650BE0C116BD3C /* DevLogDomain.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -30,8 +26,6 @@
 /* Begin PBXFileReference section */
 		099A7D56A0E544A28733E668 /* DevLogWidgetCoreTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = DevLogWidgetCoreTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		6AF1B307A7E7CC03AA2BABB1 /* DevLogWidgetCore.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = DevLogWidgetCore.framework; sourceTree = BUILT_PRODUCTS_DIR; };
-		7C18996E00A69C4BCB0F63AE /* DevLogData.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = DevLogData.framework; sourceTree = BUILT_PRODUCTS_DIR; };
-		B108898FD3650BE0C116BD3C /* DevLogDomain.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = DevLogDomain.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		B55555555555555555555555 /* DevLogCore.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = DevLogCore.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		FBD260F923A87C1577DBFF0F /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.0.sdk/System/Library/Frameworks/Foundation.framework; sourceTree = DEVELOPER_DIR; };
 /* End PBXFileReference section */
@@ -65,8 +59,6 @@
 			files = (
 				8EF4007864D24A1F9074C80A /* DevLogWidgetCore.framework in Frameworks */,
 				B69F5362A64E4C8FAA88393A /* DevLogCore.framework in Frameworks */,
-				CE64C1569E684FD7BF6E21E7 /* DevLogDomain.framework in Frameworks */,
-				7E979130578F4839B3C640C1 /* DevLogData.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -76,8 +68,6 @@
 			files = (
 				75C99AB35C6DF930E824185E /* Foundation.framework in Frameworks */,
 				B11111111111111111111111 /* DevLogCore.framework in Frameworks */,
-				A1DEB84CF3B18EC2005382C5 /* DevLogDomain.framework in Frameworks */,
-				80423C5F6B880409E39FD20F /* DevLogData.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -108,8 +98,6 @@
 				6AF1B307A7E7CC03AA2BABB1 /* DevLogWidgetCore.framework */,
 				099A7D56A0E544A28733E668 /* DevLogWidgetCoreTests.xctest */,
 				B55555555555555555555555 /* DevLogCore.framework */,
-				B108898FD3650BE0C116BD3C /* DevLogDomain.framework */,
-				7C18996E00A69C4BCB0F63AE /* DevLogData.framework */,
 			);
 			name = Products;
 			sourceTree = "<group>";
diff --git a/Widget/DevLogWidgetCore/Sources/Common/WidgetSharedDefaultsStore.swift b/Widget/DevLogWidgetCore/Sources/Common/WidgetSharedDefaultsStore.swift
index ef03d307..72b63765 100644
--- a/Widget/DevLogWidgetCore/Sources/Common/WidgetSharedDefaultsStore.swift
+++ b/Widget/DevLogWidgetCore/Sources/Common/WidgetSharedDefaultsStore.swift
@@ -6,8 +6,6 @@
 //
 
 import Foundation
-import DevLogDomain
-import DevLogData
 
 public final class WidgetSharedDefaultsStore {
     private let userDefaults: UserDefaults
diff --git a/Widget/DevLogWidgetCore/Sources/Common/WidgetSnapshotStore.swift b/Widget/DevLogWidgetCore/Sources/Common/WidgetSnapshotStore.swift
index 7a8b005e..727e2bc8 100644
--- a/Widget/DevLogWidgetCore/Sources/Common/WidgetSnapshotStore.swift
+++ b/Widget/DevLogWidgetCore/Sources/Common/WidgetSnapshotStore.swift
@@ -6,8 +6,6 @@
 //
 
 import Foundation
-import DevLogDomain
-import DevLogData
 
 public final class WidgetSnapshotStore {
     private let store: WidgetSharedDefaultsStore
diff --git a/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshot.swift b/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshot.swift
index b25f89ee..78fc0855 100644
--- a/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshot.swift
+++ b/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshot.swift
@@ -6,8 +6,6 @@
 //
 
 import Foundation
-import DevLogDomain
-import DevLogData
 
 public struct HeatmapWidgetSnapshot: Codable, Equatable {
     let generatedAt: Date
diff --git a/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshotFactory.swift b/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshotFactory.swift
index a290a0f9..5db55edf 100644
--- a/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshotFactory.swift
+++ b/Widget/DevLogWidgetCore/Sources/Heatmap/HeatmapWidgetSnapshotFactory.swift
@@ -7,7 +7,6 @@
 
 import Foundation
 import DevLogCore
-import DevLogData
 
 public struct HeatmapWidgetSnapshotFactory {
     fileprivate struct DailyCounts {
diff --git a/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshot.swift b/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshot.swift
index 89034668..fcb0d3d0 100644
--- a/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshot.swift
+++ b/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshot.swift
@@ -6,8 +6,6 @@
 //
 
 import Foundation
-import DevLogDomain
-import DevLogData
 
 public struct TodayWidgetSnapshot: Codable, Equatable {
     let generatedAt: Date
diff --git a/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshotFactory.swift b/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshotFactory.swift
index 6c935e04..efa0a212 100644
--- a/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshotFactory.swift
+++ b/Widget/DevLogWidgetCore/Sources/Today/TodayWidgetSnapshotFactory.swift
@@ -7,7 +7,6 @@
 
 import Foundation
 import DevLogCore
-import DevLogData
 
 public struct TodayWidgetSnapshotFactory {
     private enum SectionCategory: String, CaseIterable {
diff --git a/Widget/DevLogWidgetCore/Tests/Heatmap/HeatmapWidgetSnapshotFactoryTests.swift b/Widget/DevLogWidgetCore/Tests/Heatmap/HeatmapWidgetSnapshotFactoryTests.swift
index 2c878a9d..5bf87ae4 100644
--- a/Widget/DevLogWidgetCore/Tests/Heatmap/HeatmapWidgetSnapshotFactoryTests.swift
+++ b/Widget/DevLogWidgetCore/Tests/Heatmap/HeatmapWidgetSnapshotFactoryTests.swift
@@ -8,7 +8,6 @@
 import Foundation
 import Testing
 import DevLogCore
-import DevLogData
 @testable import DevLogWidgetCore
 
 struct HeatmapWidgetSnapshotFactoryTests {
diff --git a/Widget/DevLogWidgetCore/Tests/Today/TodayWidgetSnapshotFactoryTests.swift b/Widget/DevLogWidgetCore/Tests/Today/TodayWidgetSnapshotFactoryTests.swift
index 96dcf92c..dc029774 100644
--- a/Widget/DevLogWidgetCore/Tests/Today/TodayWidgetSnapshotFactoryTests.swift
+++ b/Widget/DevLogWidgetCore/Tests/Today/TodayWidgetSnapshotFactoryTests.swift
@@ -8,7 +8,6 @@
 import Foundation
 import Testing
 import DevLogCore
-import DevLogData
 @testable import DevLogWidgetCore
 
 struct TodayWidgetSnapshotFactoryTests {