diff --git a/CLAUDE.md b/CLAUDE.md
index 40e6ee1..0a14f64 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -6,8 +6,9 @@ and sync peer-to-peer through a GitHub repo used as dumb storage.
 
 - Package name: `todo` (Dart SDK `^3.12.2`).
 - Git remote: `origin` → `github.com/kuhyx/todo-app`.
-- The note **content** also syncs to a separate private repo `kuhyx/todo-sync`
-  via the in-app GitHub sync (changeset files); that is data, not this codebase.
+- The note **content** also syncs to a separate private repo `kuhyx/syncs`
+  (under `todo-sync/`) via the in-app GitHub sync (changeset files); that is
+  data, not this codebase.
 
 ## Git workflow (repo-specific — overrides global rules)
 
@@ -42,7 +43,8 @@ Three layers under `lib/`, each single-purpose:
     AND-combined), `NoteSort`, `watchNotes`/`watchCount` streams, and
     `importNotes` (safe newer-wins merge by id).
 - `sync/` — GitHub-as-storage sync.
-  - `sync_service.dart`: each device owns one file `changesets/<nodeId>.json`
+  - `sync_service.dart`: each device owns one file
+    `todo-sync/changesets/<nodeId>.json`
     holding its full CRDT changeset. No two devices write the same file ⇒ no
     git merge conflicts; convergence is the CRDT layer's job (pull every other
     device's changeset and `merge()`, which is commutative + idempotent).
diff --git a/lib/sync/sync_service.dart b/lib/sync/sync_service.dart
index fb0e5ba..d76fa6d 100644
--- a/lib/sync/sync_service.dart
+++ b/lib/sync/sync_service.dart
@@ -22,14 +22,15 @@ class SyncResult {
 
 /// Synchronises a [NoteRepository] with a GitHub repo used as dumb storage.
 ///
-/// Design: each device owns exactly one file, `changesets/<nodeId>.json`,
+/// Design: each device owns exactly one file,
+/// `todo-sync/changesets/<nodeId>.json`,
 /// holding its full CRDT changeset. Because no two devices ever write the
 /// same file, there are **no git-level merge conflicts**. Data convergence
 /// is handled entirely by the CRDT layer: pulling every other device's
 /// changeset and [NoteRepository.merge]-ing it is commutative and
 /// idempotent, so repeated syncs in any order converge to the same state.
 class SyncService {
-  const SyncService({this.changesetDir = 'changesets'});
+  const SyncService({this.changesetDir = 'todo-sync/changesets'});
 
   /// Directory in the repo under which per-device changeset files live.
   final String changesetDir;
diff --git a/lib/sync/sync_settings.dart b/lib/sync/sync_settings.dart
index e5c6e3d..40715fa 100644
--- a/lib/sync/sync_settings.dart
+++ b/lib/sync/sync_settings.dart
@@ -52,14 +52,24 @@ class SyncSettings {
   /// path on Android and use libsecret on Linux.
   static const _secure = FlutterSecureStorage();
 
-  /// Loads settings, defaulting the repo to `kuhyx/todo-sync` and the client id
+  /// Loads settings, defaulting the repo to `kuhyx/syncs` and the client id
   /// to the baked-in [defaultClientId] so first run (and any reinstall) needs
   /// nothing but a single "Connect GitHub" tap.
+  ///
+  /// A device that already persisted the old standalone `todo-sync` repo
+  /// name (before it was folded into the shared `syncs` monorepo) is
+  /// migrated to `syncs` here and the corrected value is written straight
+  /// back to prefs, so this only ever runs once per device.
   static Future<SyncSettings> load() async {
     final prefs = await SharedPreferences.getInstance();
+    var repo = prefs.getString(_kRepo) ?? 'syncs';
+    if (repo == 'todo-sync') {
+      repo = 'syncs';
+      await prefs.setString(_kRepo, repo);
+    }
     return SyncSettings(
       owner: prefs.getString(_kOwner) ?? 'kuhyx',
-      repo: prefs.getString(_kRepo) ?? 'todo-sync',
+      repo: repo,
       token: await _loadToken(prefs),
       clientId: prefs.getString(_kClientId) ?? defaultClientId,
     );
diff --git a/lib/ui/settings_screen.dart b/lib/ui/settings_screen.dart
index 430b27e..6beaea3 100644
--- a/lib/ui/settings_screen.dart
+++ b/lib/ui/settings_screen.dart
@@ -250,7 +250,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
           const SizedBox(height: 4),
           Text(
             'Authorize in your browser — no token to paste. Syncs to '
-            'kuhyx/todo-sync by default.',
+            'kuhyx/syncs by default.',
             style: Theme.of(context).textTheme.bodySmall,
           ),
           const SizedBox(height: 12),
diff --git a/test/settings_screen_test.dart b/test/settings_screen_test.dart
index 5772682..579d76f 100644
--- a/test/settings_screen_test.dart
+++ b/test/settings_screen_test.dart
@@ -78,7 +78,7 @@ void main() {
     WidgetTester tester, {
     SyncSettings initial = const SyncSettings(
       owner: 'kuhyx',
-      repo: 'todo-sync',
+      repo: 'syncs',
       token: 't',
     ),
     http.Client? httpClient,
diff --git a/test/sync_service_test.dart b/test/sync_service_test.dart
index 5ef9ad5..7dceadf 100644
--- a/test/sync_service_test.dart
+++ b/test/sync_service_test.dart
@@ -43,7 +43,7 @@ void main() {
       {
         'type': 'file',
         'name': otherFile,
-        'path': 'changesets/$otherFile',
+        'path': 'todo-sync/changesets/$otherFile',
         'sha': 'sha-other',
       },
     ]);
@@ -54,7 +54,7 @@ void main() {
         putCount++;
         return http.Response('{}', 200);
       }
-      if (req.url.path.endsWith('/contents/changesets')) {
+      if (req.url.path.endsWith('/contents/todo-sync/changesets')) {
         return http.Response(listResponse, 200); // directory listing
       }
       return http.Response(fileResponse, 200); // the other device's file
@@ -122,7 +122,7 @@ void main() {
       {
         'type': 'file',
         'name': ownFile,
-        'path': 'changesets/$ownFile',
+        'path': 'todo-sync/changesets/$ownFile',
         'sha': 'own-sha-123',
       },
     ]);
diff --git a/test/sync_settings_test.dart b/test/sync_settings_test.dart
index 74c350c..5516ff4 100644
--- a/test/sync_settings_test.dart
+++ b/test/sync_settings_test.dart
@@ -9,19 +9,26 @@ void main() {
   // binding up first (widget tests get this for free via testWidgets).
   TestWidgetsFlutterBinding.ensureInitialized();
 
-  test(
-    'load returns the kuhyx/todo-sync defaults on a fresh install',
-    () async {
-      SharedPreferences.setMockInitialValues({});
-      installFakeSecureStorage();
-      final s = await SyncSettings.load();
-      expect(s.owner, 'kuhyx');
-      expect(s.repo, 'todo-sync');
-      expect(s.token, '');
-      // Client id defaults to the baked-in OAuth App id (one-tap connect).
-      expect(s.clientId, SyncSettings.defaultClientId);
-    },
-  );
+  test('load returns the kuhyx/syncs defaults on a fresh install', () async {
+    SharedPreferences.setMockInitialValues({});
+    installFakeSecureStorage();
+    final s = await SyncSettings.load();
+    expect(s.owner, 'kuhyx');
+    expect(s.repo, 'syncs');
+    expect(s.token, '');
+    // Client id defaults to the baked-in OAuth App id (one-tap connect).
+    expect(s.clientId, SyncSettings.defaultClientId);
+  });
+
+  test('load migrates a persisted old todo-sync repo value to syncs', () async {
+    SharedPreferences.setMockInitialValues({'sync.repo': 'todo-sync'});
+    installFakeSecureStorage();
+    final s = await SyncSettings.load();
+    expect(s.repo, 'syncs');
+
+    final prefs = await SharedPreferences.getInstance();
+    expect(prefs.getString('sync.repo'), 'syncs');
+  });
 
   test('save stores the token in the keystore, not in prefs', () async {
     SharedPreferences.setMockInitialValues({});
diff --git a/tool/device_flow_check.dart b/tool/device_flow_check.dart
index 1b72fe9..c7e35fc 100644
--- a/tool/device_flow_check.dart
+++ b/tool/device_flow_check.dart
@@ -12,7 +12,7 @@ import 'package:http/http.dart' as http;
 const _clientId = 'Ov23li9tF2R46PqzJgch';
 const _scope = 'repo';
 const _owner = 'kuhyx';
-const _repo = 'todo-sync';
+const _repo = 'syncs';
 
 Future<void> main() async {
   final code = await http.post(
diff --git a/tool/sync_smoke.dart b/tool/sync_smoke.dart
index a21cdcd..c63634b 100644
--- a/tool/sync_smoke.dart
+++ b/tool/sync_smoke.dart
@@ -24,9 +24,9 @@ Future<void> main() async {
   }
 
   // Throwaway directory so we never pollute the real `changesets/`.
-  const service = SyncService(changesetDir: 'changesets_smoketest');
+  const service = SyncService(changesetDir: 'todo-sync/changesets_smoketest');
   GitHubClient client() =>
-      GitHubClient(owner: 'kuhyx', repo: 'todo-sync', token: token);
+      GitHubClient(owner: 'kuhyx', repo: 'syncs', token: token);
 
   final deviceA = await NoteRepository.openInMemory();
   final deviceB = await NoteRepository.openInMemory();
@@ -59,7 +59,9 @@ Future<void> main() async {
 
   // Cleanup: remove the throwaway changeset files.
   final cleanup = client();
-  for (final f in await cleanup.listDirectory('changesets_smoketest')) {
+  for (final f in await cleanup.listDirectory(
+    'todo-sync/changesets_smoketest',
+  )) {
     await cleanup.deleteFile(f.path, f.sha, message: 'smoke test cleanup');
   }
   stdout.writeln('Cleaned up throwaway changeset files.');