diff --git a/Conjuga/Conjuga/ConjugaApp.swift b/Conjuga/Conjuga/ConjugaApp.swift
index 18c9638..2fb6a04 100644
--- a/Conjuga/Conjuga/ConjugaApp.swift
+++ b/Conjuga/Conjuga/ConjugaApp.swift
@@ -217,26 +217,16 @@ struct ConjugaApp: App {
     }
 
     private static func makeLocalContainer(at url: URL) throws -> ModelContainer {
+        // Built from the single shared model list so the app and the widget
+        // extension always open the store with an identical schema.
+        let schema = Schema(SharedStore.localSchemaModels)
         let localConfig = ModelConfiguration(
             "local",
-            schema: Schema([
-                Verb.self, VerbForm.self, IrregularSpan.self,
-                TenseGuide.self, CourseDeck.self, VocabCard.self,
-                TextbookChapter.self,
-                DownloadedVideo.self,
-                Book.self, BookChapter.self,
-            ]),
+            schema: schema,
             url: url,
             cloudKitDatabase: .none
         )
-        return try ModelContainer(
-            for: Verb.self, VerbForm.self, IrregularSpan.self,
-                 TenseGuide.self, CourseDeck.self, VocabCard.self,
-                 TextbookChapter.self,
-                 DownloadedVideo.self,
-                 Book.self, BookChapter.self,
-            configurations: localConfig
-        )
+        return try ModelContainer(for: schema, configurations: localConfig)
     }
 
     private static func localStoreIsUsable(container: ModelContainer) -> Bool {
diff --git a/Conjuga/ConjugaWidget/CombinedWidget.swift b/Conjuga/ConjugaWidget/CombinedWidget.swift
index ef24ef3..8639a6d 100644
--- a/Conjuga/ConjugaWidget/CombinedWidget.swift
+++ b/Conjuga/ConjugaWidget/CombinedWidget.swift
@@ -41,24 +41,19 @@ struct CombinedProvider: TimelineProvider {
     private func fetchWordOfDay(for date: Date) -> WordOfDay? {
         guard let localURL = SharedStore.localStoreURL() else { return nil }
 
-        // MUST declare all 7 local entities to match the main app's schema.
-        // Declaring a subset would cause SwiftData to destructively migrate the
-        // store on open, dropping the entities not listed here (this is how we
-        // previously lost all TextbookChapter rows on every widget refresh).
+        // Open the store with the SAME schema as the main app. A subset schema
+        // would make SwiftData destructively migrate the store on open and drop
+        // every unlisted table (this is how widget refreshes kept wiping the
+        // bundled Book rows, and TextbookChapter before them).
+        let schema = Schema(SharedStore.localSchemaModels)
         let config = ModelConfiguration(
             "local",
-            schema: Schema([
-                Verb.self, VerbForm.self, IrregularSpan.self,
-                TenseGuide.self, CourseDeck.self, VocabCard.self,
-                TextbookChapter.self,
-            ]),
+            schema: schema,
             url: localURL,
             cloudKitDatabase: .none
         )
         guard let container = try? ModelContainer(
-            for: Verb.self, VerbForm.self, IrregularSpan.self,
-                 TenseGuide.self, CourseDeck.self, VocabCard.self,
-                 TextbookChapter.self,
+            for: schema,
             configurations: config
         ) else { return nil }
 
diff --git a/Conjuga/ConjugaWidget/WordOfDayWidget.swift b/Conjuga/ConjugaWidget/WordOfDayWidget.swift
index c41c3be..1b490c8 100644
--- a/Conjuga/ConjugaWidget/WordOfDayWidget.swift
+++ b/Conjuga/ConjugaWidget/WordOfDayWidget.swift
@@ -32,24 +32,19 @@ struct WordOfDayProvider: TimelineProvider {
     private func fetchWordOfDay(for date: Date) -> WordOfDay? {
         guard let localURL = SharedStore.localStoreURL() else { return nil }
 
-        // MUST declare all 7 local entities to match the main app's schema.
-        // Declaring a subset would cause SwiftData to destructively migrate the
-        // store on open, dropping the entities not listed here (this is how we
-        // previously lost all TextbookChapter rows on every widget refresh).
+        // Open the store with the SAME schema as the main app. A subset schema
+        // would make SwiftData destructively migrate the store on open and drop
+        // every unlisted table (this is how widget refreshes kept wiping the
+        // bundled Book rows, and TextbookChapter before them).
+        let schema = Schema(SharedStore.localSchemaModels)
         let config = ModelConfiguration(
             "local",
-            schema: Schema([
-                Verb.self, VerbForm.self, IrregularSpan.self,
-                TenseGuide.self, CourseDeck.self, VocabCard.self,
-                TextbookChapter.self,
-            ]),
+            schema: schema,
             url: localURL,
             cloudKitDatabase: .none
         )
         guard let container = try? ModelContainer(
-            for: Verb.self, VerbForm.self, IrregularSpan.self,
-                 TenseGuide.self, CourseDeck.self, VocabCard.self,
-                 TextbookChapter.self,
+            for: schema,
             configurations: config
         ) else { return nil }
 
diff --git a/Conjuga/SharedModels/Sources/SharedModels/SharedStore.swift b/Conjuga/SharedModels/Sources/SharedModels/SharedStore.swift
index 50b2b83..0c5a710 100644
--- a/Conjuga/SharedModels/Sources/SharedModels/SharedStore.swift
+++ b/Conjuga/SharedModels/Sources/SharedModels/SharedStore.swift
@@ -23,4 +23,22 @@ public enum SharedStore {
     /// and hit the exact container used for seeding.
     @MainActor
     public static var localContainer: ModelContainer?
+
+    /// The canonical model list for the local reference-data store.
+    ///
+    /// The main app AND the widget extension MUST build their `ModelContainer`
+    /// from this exact set. Opening the store with a *subset* schema makes
+    /// SwiftData destructively migrate it — silently dropping every table that
+    /// isn't listed. That is how widget refreshes repeatedly wiped the bundled
+    /// `Book`/`BookChapter` rows (and `TextbookChapter` before them). Keeping
+    /// one shared list means a newly-added model can't be forgotten in the
+    /// widget and quietly nuke its own data.
+    public static var localSchemaModels: [any PersistentModel.Type] {
+        [
+            Verb.self, VerbForm.self, IrregularSpan.self,
+            TenseGuide.self, CourseDeck.self, VocabCard.self,
+            TextbookChapter.self, DownloadedVideo.self,
+            Book.self, BookChapter.self,
+        ]
+    }
 }