diff --git a/packages/shorebird_code_push_protocol/lib/src/models/account.dart b/packages/shorebird_code_push_protocol/lib/src/models/account.dart
deleted file mode 100644
index 96e83266..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/account.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-import 'package:json_annotation/json_annotation.dart';
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
-
-part 'account.g.dart';
-
-/// {@template account}
-/// A user account which contains zero or more apps.
-/// {@endtemplate}
-@JsonSerializable()
-class Account {
-  /// {@macro account}
-  Account({required this.apiKey, List<App>? apps}) : apps = apps ?? [];
-
-  /// Converts a Map<String, dynamic> to a [Account]
-  factory Account.fromJson(Map<String, dynamic> json) =>
-      _$AccountFromJson(json);
-
-  /// Converts a [Account] to a Map<String, dynamic>
-  Map<String, dynamic> toJson() => _$AccountToJson(this);
-
-  /// List of apps associated with this account.
-  final List<App> apps;
-
-  /// The api key associated with this account.
-  final String apiKey;
-}
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/account.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/account.g.dart
deleted file mode 100644
index 17a0fccb..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/account.g.dart
+++ /dev/null
@@ -1,31 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-// ignore_for_file: implicit_dynamic_parameter, require_trailing_commas, cast_nullable_to_non_nullable, lines_longer_than_80_chars
-
-part of 'account.dart';
-
-// **************************************************************************
-// JsonSerializableGenerator
-// **************************************************************************
-
-Account _$AccountFromJson(Map<String, dynamic> json) => $checkedCreate(
-      'Account',
-      json,
-      ($checkedConvert) {
-        final val = Account(
-          apiKey: $checkedConvert('api_key', (v) => v as String),
-          apps: $checkedConvert(
-              'apps',
-              (v) => (v as List<dynamic>?)
-                  ?.map((e) => App.fromJson(e as Map<String, dynamic>))
-                  .toList()),
-        );
-        return val;
-      },
-      fieldKeyMap: const {'apiKey': 'api_key'},
-    );
-
-Map<String, dynamic> _$AccountToJson(Account instance) => <String, dynamic>{
-      'apps': instance.apps.map((e) => e.toJson()).toList(),
-      'api_key': instance.apiKey,
-    };
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/app.dart b/packages/shorebird_code_push_protocol/lib/src/models/app.dart
index beaffc8e..62ffd4ab 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/app.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/app.dart
@@ -1,5 +1,4 @@
 import 'package:json_annotation/json_annotation.dart';
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
 
 part 'app.g.dart';
 
@@ -9,8 +8,11 @@ part 'app.g.dart';
 @JsonSerializable()
 class App {
   /// {@macro app}
-  App({required this.appId, List<Release>? releases})
-      : releases = releases ?? [];
+  const App({
+    required this.appId,
+    this.latestReleaseVersion,
+    this.latestPatchNumber,
+  });
 
   /// Converts a Map<String, dynamic> to an [App]
   factory App.fromJson(Map<String, dynamic> json) => _$AppFromJson(json);
@@ -21,6 +23,9 @@ class App {
   /// The ID of the app.
   final String appId;
 
-  /// List of releases associated with this app.
-  final List<Release> releases;
+  /// The latest release version of the app.
+  final String? latestReleaseVersion;
+
+  /// The latest patch number of the app.
+  final int? latestPatchNumber;
 }
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/app.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/app.g.dart
index 23f841fe..987defd0 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/app.g.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/app.g.dart
@@ -14,18 +14,22 @@ App _$AppFromJson(Map<String, dynamic> json) => $checkedCreate(
       ($checkedConvert) {
         final val = App(
           appId: $checkedConvert('app_id', (v) => v as String),
-          releases: $checkedConvert(
-              'releases',
-              (v) => (v as List<dynamic>?)
-                  ?.map((e) => Release.fromJson(e as Map<String, dynamic>))
-                  .toList()),
+          latestReleaseVersion:
+              $checkedConvert('latest_release_version', (v) => v as String?),
+          latestPatchNumber:
+              $checkedConvert('latest_patch_number', (v) => v as int?),
         );
         return val;
       },
-      fieldKeyMap: const {'appId': 'app_id'},
+      fieldKeyMap: const {
+        'appId': 'app_id',
+        'latestReleaseVersion': 'latest_release_version',
+        'latestPatchNumber': 'latest_patch_number'
+      },
     );
 
 Map<String, dynamic> _$AppToJson(App instance) => <String, dynamic>{
       'app_id': instance.appId,
-      'releases': instance.releases.map((e) => e.toJson()).toList(),
+      'latest_release_version': instance.latestReleaseVersion,
+      'latest_patch_number': instance.latestPatchNumber,
     };
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/models.dart b/packages/shorebird_code_push_protocol/lib/src/models/models.dart
index 161678c3..07882afe 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/models.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/models.dart
@@ -1,6 +1,4 @@
-export 'account.dart';
 export 'app.dart';
 export 'artifact.dart';
 export 'patch.dart';
-export 'registry.dart';
-export 'release.dart';
+export 'user.dart';
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/patch.dart b/packages/shorebird_code_push_protocol/lib/src/models/patch.dart
index d5ebf35b..e00a3fe5 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/patch.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/patch.dart
@@ -1,5 +1,4 @@
 import 'package:json_annotation/json_annotation.dart';
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
 
 part 'patch.g.dart';
 
@@ -9,11 +8,7 @@ part 'patch.g.dart';
 @JsonSerializable()
 class Patch {
   /// {@macro patch}
-  const Patch({
-    required this.number,
-    this.artifacts = const [],
-    this.channels = const [],
-  });
+  const Patch({required this.id, required this.number});
 
   /// Converts a Map<String, dynamic> to a [Patch]
   factory Patch.fromJson(Map<String, dynamic> json) => _$PatchFromJson(json);
@@ -21,12 +16,9 @@ class Patch {
   /// Converts a [Patch] to a Map<String, dynamic>
   Map<String, dynamic> toJson() => _$PatchToJson(this);
 
+  /// The unique patch identifier.
+  final int id;
+
   /// The patch number (newer patches are larger).
   final int number;
-
-  /// The list of channels associated with this patch.
-  final List<String> channels;
-
-  /// List of artifacts associated with this patch.
-  final List<Artifact> artifacts;
 }
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/patch.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/patch.g.dart
index 7b942887..3f04be68 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/patch.g.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/patch.g.dart
@@ -13,26 +13,14 @@ Patch _$PatchFromJson(Map<String, dynamic> json) => $checkedCreate(
       json,
       ($checkedConvert) {
         final val = Patch(
+          id: $checkedConvert('id', (v) => v as int),
           number: $checkedConvert('number', (v) => v as int),
-          artifacts: $checkedConvert(
-              'artifacts',
-              (v) =>
-                  (v as List<dynamic>?)
-                      ?.map((e) => Artifact.fromJson(e as Map<String, dynamic>))
-                      .toList() ??
-                  const []),
-          channels: $checkedConvert(
-              'channels',
-              (v) =>
-                  (v as List<dynamic>?)?.map((e) => e as String).toList() ??
-                  const []),
         );
         return val;
       },
     );
 
 Map<String, dynamic> _$PatchToJson(Patch instance) => <String, dynamic>{
+      'id': instance.id,
       'number': instance.number,
-      'channels': instance.channels,
-      'artifacts': instance.artifacts.map((e) => e.toJson()).toList(),
     };
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/registry.dart b/packages/shorebird_code_push_protocol/lib/src/models/registry.dart
deleted file mode 100644
index c6568ac3..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/registry.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-import 'package:json_annotation/json_annotation.dart';
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
-
-part 'registry.g.dart';
-
-/// {@template registry}
-/// A collection of accounts and their respective apps
-/// {@endtemplate}
-@JsonSerializable()
-class Registry {
-  /// {@macro registry}
-  const Registry({this.accounts = const []});
-
-  /// Converts a Map<String, dynamic> to a [Registry]
-  factory Registry.fromJson(Map<String, dynamic> json) =>
-      _$RegistryFromJson(json);
-
-  /// Converts a [Registry] to a Map<String, dynamic>
-  Map<String, dynamic> toJson() => _$RegistryToJson(this);
-
-  /// List of accounts associated with this registry.
-  final List<Account> accounts;
-}
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/registry.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/registry.g.dart
deleted file mode 100644
index 70b6fa89..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/registry.g.dart
+++ /dev/null
@@ -1,30 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-// ignore_for_file: implicit_dynamic_parameter, require_trailing_commas, cast_nullable_to_non_nullable, lines_longer_than_80_chars
-
-part of 'registry.dart';
-
-// **************************************************************************
-// JsonSerializableGenerator
-// **************************************************************************
-
-Registry _$RegistryFromJson(Map<String, dynamic> json) => $checkedCreate(
-      'Registry',
-      json,
-      ($checkedConvert) {
-        final val = Registry(
-          accounts: $checkedConvert(
-              'accounts',
-              (v) =>
-                  (v as List<dynamic>?)
-                      ?.map((e) => Account.fromJson(e as Map<String, dynamic>))
-                      .toList() ??
-                  const []),
-        );
-        return val;
-      },
-    );
-
-Map<String, dynamic> _$RegistryToJson(Registry instance) => <String, dynamic>{
-      'accounts': instance.accounts.map((e) => e.toJson()).toList(),
-    };
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/release.dart b/packages/shorebird_code_push_protocol/lib/src/models/release.dart
deleted file mode 100644
index 6f32d02a..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/release.dart
+++ /dev/null
@@ -1,27 +0,0 @@
-import 'package:json_annotation/json_annotation.dart';
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
-
-part 'release.g.dart';
-
-/// {@template release}
-/// A single release which contains zero or more patches.
-/// {@endtemplate}
-@JsonSerializable()
-class Release {
-  /// {@macro release}
-  Release({required this.version, List<Patch>? patches})
-      : patches = patches ?? [];
-
-  /// Converts a Map<String, dynamic> to a [Release]
-  factory Release.fromJson(Map<String, dynamic> json) =>
-      _$ReleaseFromJson(json);
-
-  /// Converts a [Release] to a Map<String, dynamic>
-  Map<String, dynamic> toJson() => _$ReleaseToJson(this);
-
-  /// The version of the release.
-  final String version;
-
-  /// List of patches associated with this release.
-  final List<Patch> patches;
-}
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/release.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/release.g.dart
deleted file mode 100644
index 4a24ffc8..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/release.g.dart
+++ /dev/null
@@ -1,30 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-// ignore_for_file: implicit_dynamic_parameter, require_trailing_commas, cast_nullable_to_non_nullable, lines_longer_than_80_chars
-
-part of 'release.dart';
-
-// **************************************************************************
-// JsonSerializableGenerator
-// **************************************************************************
-
-Release _$ReleaseFromJson(Map<String, dynamic> json) => $checkedCreate(
-      'Release',
-      json,
-      ($checkedConvert) {
-        final val = Release(
-          version: $checkedConvert('version', (v) => v as String),
-          patches: $checkedConvert(
-              'patches',
-              (v) => (v as List<dynamic>?)
-                  ?.map((e) => Patch.fromJson(e as Map<String, dynamic>))
-                  .toList()),
-        );
-        return val;
-      },
-    );
-
-Map<String, dynamic> _$ReleaseToJson(Release instance) => <String, dynamic>{
-      'version': instance.version,
-      'patches': instance.patches.map((e) => e.toJson()).toList(),
-    };
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/user.dart b/packages/shorebird_code_push_protocol/lib/src/models/user.dart
new file mode 100644
index 00000000..a6a0c4f9
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/lib/src/models/user.dart
@@ -0,0 +1,21 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'user.g.dart';
+
+/// {@template user}
+/// A user account which contains zero or more apps.
+/// {@endtemplate}
+@JsonSerializable()
+class User {
+  /// {@macro user}
+  const User({required this.id});
+
+  /// Converts a Map<String, dynamic> to a [User]
+  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
+
+  /// Converts a [User] to a Map<String, dynamic>
+  Map<String, dynamic> toJson() => _$UserToJson(this);
+
+  /// The unique user identifier.
+  final int id;
+}
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/user.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/user.g.dart
new file mode 100644
index 00000000..46c852fc
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/lib/src/models/user.g.dart
@@ -0,0 +1,24 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+// ignore_for_file: implicit_dynamic_parameter, require_trailing_commas, cast_nullable_to_non_nullable, lines_longer_than_80_chars
+
+part of 'user.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+User _$UserFromJson(Map<String, dynamic> json) => $checkedCreate(
+      'User',
+      json,
+      ($checkedConvert) {
+        final val = User(
+          id: $checkedConvert('id', (v) => v as int),
+        );
+        return val;
+      },
+    );
+
+Map<String, dynamic> _$UserToJson(User instance) => <String, dynamic>{
+      'id': instance.id,
+    };
diff --git a/packages/shorebird_code_push_protocol/test/src/models/app_test.dart b/packages/shorebird_code_push_protocol/test/src/models/app_test.dart
new file mode 100644
index 00000000..a31c47bd
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/test/src/models/app_test.dart
@@ -0,0 +1,15 @@
+import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('App', () {
+    test('can be (de)serialized', () {
+      const app = App(
+        appId: 'my_app',
+        latestReleaseVersion: '1.0.0',
+        latestPatchNumber: 1,
+      );
+      expect(App.fromJson(app.toJson()).toJson(), equals(app.toJson()));
+    });
+  });
+}
diff --git a/packages/shorebird_code_push_protocol/test/src/models/artifact_test.dart b/packages/shorebird_code_push_protocol/test/src/models/artifact_test.dart
new file mode 100644
index 00000000..91efeaf2
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/test/src/models/artifact_test.dart
@@ -0,0 +1,19 @@
+import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('Artifact', () {
+    test('can be (de)serialized', () {
+      const artifact = Artifact(
+        arch: 'aarm64',
+        platform: 'android',
+        url: 'https://example.com',
+        hash: '#',
+      );
+      expect(
+        Artifact.fromJson(artifact.toJson()).toJson(),
+        equals(artifact.toJson()),
+      );
+    });
+  });
+}
diff --git a/packages/shorebird_code_push_protocol/test/src/models/patch_test.dart b/packages/shorebird_code_push_protocol/test/src/models/patch_test.dart
new file mode 100644
index 00000000..e8ceeb7f
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/test/src/models/patch_test.dart
@@ -0,0 +1,14 @@
+import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('Patch', () {
+    test('can be (de)serialized', () {
+      const patch = Patch(id: 1, number: 2);
+      expect(
+        Patch.fromJson(patch.toJson()).toJson(),
+        equals(patch.toJson()),
+      );
+    });
+  });
+}
diff --git a/packages/shorebird_code_push_protocol/test/src/models/registry_test.dart b/packages/shorebird_code_push_protocol/test/src/models/registry_test.dart
deleted file mode 100644
index 86e1f6c9..00000000
--- a/packages/shorebird_code_push_protocol/test/src/models/registry_test.dart
+++ /dev/null
@@ -1,99 +0,0 @@
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('Registry', () {
-    test('can be (de)serialized', () {
-      final registry = Registry(
-        accounts: [
-          Account(
-            apiKey: 'api_key1',
-            apps: [
-              App(
-                appId: 'app1',
-                releases: [
-                  Release(
-                    version: '1.0.0',
-                    patches: [
-                      const Patch(
-                        number: 1,
-                        artifacts: [
-                          Artifact(
-                            arch: 'aarm64',
-                            platform: 'android',
-                            url: 'localhost',
-                            hash: '#',
-                          )
-                        ],
-                        channels: ['stable'],
-                      ),
-                      const Patch(
-                        number: 2,
-                        artifacts: [
-                          Artifact(
-                            arch: 'aarm64',
-                            platform: 'android',
-                            url: 'localhost',
-                            hash: '#',
-                          )
-                        ],
-                        channels: ['stable'],
-                      )
-                    ],
-                  ),
-                  Release(version: '1.0.1'),
-                ],
-              ),
-              App(appId: 'app2'),
-            ],
-          ),
-          Account(
-            apiKey: 'api_key2',
-            apps: [
-              App(
-                appId: 'app2',
-                releases: [
-                  Release(
-                    version: '1.0.0',
-                    patches: [
-                      const Patch(
-                        number: 1,
-                        artifacts: [
-                          Artifact(
-                            arch: 'aarm64',
-                            platform: 'android',
-                            url: 'localhost',
-                            hash: '#',
-                          )
-                        ],
-                        channels: ['stable'],
-                      ),
-                      const Patch(
-                        number: 2,
-                        artifacts: [
-                          Artifact(
-                            arch: 'aarm64',
-                            platform: 'android',
-                            url: 'localhost',
-                            hash: '#',
-                          )
-                        ],
-                        channels: ['stable'],
-                      )
-                    ],
-                  ),
-                  Release(version: '2.0.0'),
-                ],
-              ),
-            ],
-          ),
-        ],
-      );
-
-      expect(
-        Registry.fromJson(registry.toJson()).toJson(),
-        equals(registry.toJson()),
-      );
-    });
-  });
-}
diff --git a/packages/shorebird_code_push_protocol/test/src/models/user_test.dart b/packages/shorebird_code_push_protocol/test/src/models/user_test.dart
new file mode 100644
index 00000000..a0f2653c
--- /dev/null
+++ b/packages/shorebird_code_push_protocol/test/src/models/user_test.dart
@@ -0,0 +1,14 @@
+import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('User', () {
+    test('can be (de)serialized', () {
+      const user = User(id: 1);
+      expect(
+        User.fromJson(user.toJson()).toJson(),
+        equals(user.toJson()),
+      );
+    });
+  });
+}