diff --git a/packages/go_router_builder/CHANGELOG.md b/packages/go_router_builder/CHANGELOG.md
index c204e83cbc3c..1c7b9366fb11 100644
--- a/packages/go_router_builder/CHANGELOG.md
+++ b/packages/go_router_builder/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.0
+
+- Route classes now required to use a mixin `with _$RouteName`.
+
 ## 2.9.1
 
 - Fixes an deprecated warning for using withNullability
diff --git a/packages/go_router_builder/README.md b/packages/go_router_builder/README.md
index 5d90b22f2851..6472f56e1d50 100644
--- a/packages/go_router_builder/README.md
+++ b/packages/go_router_builder/README.md
@@ -86,7 +86,7 @@ method.
 
 <?code-excerpt "example/lib/readme_excerpts.dart (HomeRoute)"?>
 ```dart
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
@@ -108,7 +108,7 @@ The tree of routes is defined as an attribute on each of the top-level routes:
     ),
   ],
 )
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
@@ -124,7 +124,7 @@ class RedirectRoute extends GoRouteData {
 }
 
 @TypedGoRoute<LoginRoute>(path: '/login')
-class LoginRoute extends GoRouteData {
+class LoginRoute extends GoRouteData with _$LoginRoute {
   LoginRoute({this.from});
   final String? from;
 
@@ -211,7 +211,7 @@ Parameters (named or positional) not listed in the path of `TypedGoRoute` indica
 <?code-excerpt "example/lib/readme_excerpts.dart (login)"?>
 ```dart
 @TypedGoRoute<LoginRoute>(path: '/login')
-class LoginRoute extends GoRouteData {
+class LoginRoute extends GoRouteData with _$LoginRoute {
   LoginRoute({this.from});
   final String? from;
 
@@ -229,7 +229,7 @@ For query parameters with a **non-nullable** type, you can define a default valu
 <?code-excerpt "example/lib/readme_excerpts.dart (MyRoute)"?>
 ```dart
 @TypedGoRoute<MyRoute>(path: '/my-route')
-class MyRoute extends GoRouteData {
+class MyRoute extends GoRouteData with _$MyRoute {
   MyRoute({this.queryParameter = 'defaultValue'});
   final String queryParameter;
 
@@ -250,7 +250,7 @@ parameter with the special name `$extra`:
 
 <?code-excerpt "example/lib/readme_excerpts.dart (PersonRouteWithExtra)"?>
 ```dart
-class PersonRouteWithExtra extends GoRouteData {
+class PersonRouteWithExtra extends GoRouteData with _$PersonRouteWithExtra {
   PersonRouteWithExtra(this.$extra);
   final Person? $extra;
 
@@ -281,7 +281,8 @@ You can, of course, combine the use of path, query and $extra parameters:
 <?code-excerpt "example/lib/readme_excerpts.dart (HotdogRouteWithEverything)"?>
 ```dart
 @TypedGoRoute<HotdogRouteWithEverything>(path: '/:ketchup')
-class HotdogRouteWithEverything extends GoRouteData {
+class HotdogRouteWithEverything extends GoRouteData
+    with _$HotdogRouteWithEverything {
   HotdogRouteWithEverything(this.ketchup, this.mustard, this.$extra);
   final bool ketchup; // A required path parameter.
   final String? mustard; // An optional query parameter.
diff --git a/packages/go_router_builder/example/lib/all_types.dart b/packages/go_router_builder/example/lib/all_types.dart
index 63d73caa4c0c..2394a5e3715a 100644
--- a/packages/go_router_builder/example/lib/all_types.dart
+++ b/packages/go_router_builder/example/lib/all_types.dart
@@ -29,7 +29,7 @@ part 'all_types.g.dart';
       path: 'iterable-route-with-default-values'),
 ])
 @immutable
-class AllTypesBaseRoute extends GoRouteData {
+class AllTypesBaseRoute extends GoRouteData with _$AllTypesBaseRoute {
   const AllTypesBaseRoute();
 
   @override
@@ -39,7 +39,7 @@ class AllTypesBaseRoute extends GoRouteData {
       );
 }
 
-class BigIntRoute extends GoRouteData {
+class BigIntRoute extends GoRouteData with _$BigIntRoute {
   BigIntRoute({
     required this.requiredBigIntField,
     this.bigIntField,
@@ -62,7 +62,7 @@ class BigIntRoute extends GoRouteData {
       );
 }
 
-class BoolRoute extends GoRouteData {
+class BoolRoute extends GoRouteData with _$BoolRoute {
   BoolRoute({
     required this.requiredBoolField,
     this.boolField,
@@ -88,7 +88,7 @@ class BoolRoute extends GoRouteData {
       );
 }
 
-class DateTimeRoute extends GoRouteData {
+class DateTimeRoute extends GoRouteData with _$DateTimeRoute {
   DateTimeRoute({
     required this.requiredDateTimeField,
     this.dateTimeField,
@@ -111,7 +111,7 @@ class DateTimeRoute extends GoRouteData {
       );
 }
 
-class DoubleRoute extends GoRouteData {
+class DoubleRoute extends GoRouteData with _$DoubleRoute {
   DoubleRoute({
     required this.requiredDoubleField,
     this.doubleField,
@@ -137,7 +137,7 @@ class DoubleRoute extends GoRouteData {
       );
 }
 
-class IntRoute extends GoRouteData {
+class IntRoute extends GoRouteData with _$IntRoute {
   IntRoute({
     required this.requiredIntField,
     this.intField,
@@ -163,7 +163,7 @@ class IntRoute extends GoRouteData {
       );
 }
 
-class NumRoute extends GoRouteData {
+class NumRoute extends GoRouteData with _$NumRoute {
   NumRoute({
     required this.requiredNumField,
     this.numField,
@@ -189,7 +189,7 @@ class NumRoute extends GoRouteData {
       );
 }
 
-class EnumRoute extends GoRouteData {
+class EnumRoute extends GoRouteData with _$EnumRoute {
   EnumRoute({
     required this.requiredEnumField,
     this.enumField,
@@ -216,7 +216,7 @@ class EnumRoute extends GoRouteData {
       );
 }
 
-class EnhancedEnumRoute extends GoRouteData {
+class EnhancedEnumRoute extends GoRouteData with _$EnhancedEnumRoute {
   EnhancedEnumRoute({
     required this.requiredEnumField,
     this.enumField,
@@ -243,7 +243,7 @@ class EnhancedEnumRoute extends GoRouteData {
       );
 }
 
-class StringRoute extends GoRouteData {
+class StringRoute extends GoRouteData with _$StringRoute {
   StringRoute({
     required this.requiredStringField,
     this.stringField,
@@ -269,7 +269,7 @@ class StringRoute extends GoRouteData {
       );
 }
 
-class UriRoute extends GoRouteData {
+class UriRoute extends GoRouteData with _$UriRoute {
   UriRoute({
     required this.requiredUriField,
     this.uriField,
@@ -292,7 +292,7 @@ class UriRoute extends GoRouteData {
       );
 }
 
-class IterableRoute extends GoRouteData {
+class IterableRoute extends GoRouteData with _$IterableRoute {
   IterableRoute({
     this.intIterableField,
     this.doubleIterableField,
@@ -365,7 +365,8 @@ class IterableRoute extends GoRouteData {
       );
 }
 
-class IterableRouteWithDefaultValues extends GoRouteData {
+class IterableRouteWithDefaultValues extends GoRouteData
+    with _$IterableRouteWithDefaultValues {
   const IterableRouteWithDefaultValues({
     this.intIterableField = const <int>[0],
     this.doubleIterableField = const <double>[0, 1, 2],
diff --git a/packages/go_router_builder/example/lib/all_types.g.dart b/packages/go_router_builder/example/lib/all_types.g.dart
index 581814d47c25..6af36b14ee65 100644
--- a/packages/go_router_builder/example/lib/all_types.g.dart
+++ b/packages/go_router_builder/example/lib/all_types.g.dart
@@ -14,82 +14,87 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $allTypesBaseRoute => GoRouteData.$route(
       path: '/',
-      factory: $AllTypesBaseRouteExtension._fromState,
+      factory: _$AllTypesBaseRoute._fromState,
       routes: [
         GoRouteData.$route(
           path: 'big-int-route/:requiredBigIntField',
-          factory: $BigIntRouteExtension._fromState,
+          factory: _$BigIntRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'bool-route/:requiredBoolField',
-          factory: $BoolRouteExtension._fromState,
+          factory: _$BoolRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'date-time-route/:requiredDateTimeField',
-          factory: $DateTimeRouteExtension._fromState,
+          factory: _$DateTimeRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'double-route/:requiredDoubleField',
-          factory: $DoubleRouteExtension._fromState,
+          factory: _$DoubleRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'int-route/:requiredIntField',
-          factory: $IntRouteExtension._fromState,
+          factory: _$IntRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'num-route/:requiredNumField',
-          factory: $NumRouteExtension._fromState,
+          factory: _$NumRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'double-route/:requiredDoubleField',
-          factory: $DoubleRouteExtension._fromState,
+          factory: _$DoubleRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'enum-route/:requiredEnumField',
-          factory: $EnumRouteExtension._fromState,
+          factory: _$EnumRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'enhanced-enum-route/:requiredEnumField',
-          factory: $EnhancedEnumRouteExtension._fromState,
+          factory: _$EnhancedEnumRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'string-route/:requiredStringField',
-          factory: $StringRouteExtension._fromState,
+          factory: _$StringRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'uri-route/:requiredUriField',
-          factory: $UriRouteExtension._fromState,
+          factory: _$UriRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'iterable-route',
-          factory: $IterableRouteExtension._fromState,
+          factory: _$IterableRoute._fromState,
         ),
         GoRouteData.$route(
           path: 'iterable-route-with-default-values',
-          factory: $IterableRouteWithDefaultValuesExtension._fromState,
+          factory: _$IterableRouteWithDefaultValues._fromState,
         ),
       ],
     );
 
-extension $AllTypesBaseRouteExtension on AllTypesBaseRoute {
+mixin _$AllTypesBaseRoute on GoRouteData {
   static AllTypesBaseRoute _fromState(GoRouterState state) =>
       const AllTypesBaseRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $BigIntRouteExtension on BigIntRoute {
+mixin _$BigIntRoute on GoRouteData {
   static BigIntRoute _fromState(GoRouterState state) => BigIntRoute(
         requiredBigIntField:
             BigInt.parse(state.pathParameters['requiredBigIntField']!)!,
@@ -97,24 +102,32 @@ extension $BigIntRouteExtension on BigIntRoute {
             'big-int-field', state.uri.queryParameters, BigInt.tryParse),
       );
 
+  BigIntRoute get _self => this as BigIntRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/big-int-route/${Uri.encodeComponent(requiredBigIntField.toString())}',
+        '/big-int-route/${Uri.encodeComponent(_self.requiredBigIntField.toString())}',
         queryParams: {
-          if (bigIntField != null) 'big-int-field': bigIntField!.toString(),
+          if (_self.bigIntField != null)
+            'big-int-field': _self.bigIntField!.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $BoolRouteExtension on BoolRoute {
+mixin _$BoolRoute on GoRouteData {
   static BoolRoute _fromState(GoRouterState state) => BoolRoute(
         requiredBoolField:
             _$boolConverter(state.pathParameters['requiredBoolField']!)!,
@@ -127,27 +140,35 @@ extension $BoolRouteExtension on BoolRoute {
             true,
       );
 
+  BoolRoute get _self => this as BoolRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/bool-route/${Uri.encodeComponent(requiredBoolField.toString())}',
+        '/bool-route/${Uri.encodeComponent(_self.requiredBoolField.toString())}',
         queryParams: {
-          if (boolField != null) 'bool-field': boolField!.toString(),
-          if (boolFieldWithDefaultValue != true)
+          if (_self.boolField != null)
+            'bool-field': _self.boolField!.toString(),
+          if (_self.boolFieldWithDefaultValue != true)
             'bool-field-with-default-value':
-                boolFieldWithDefaultValue.toString(),
+                _self.boolFieldWithDefaultValue.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $DateTimeRouteExtension on DateTimeRoute {
+mixin _$DateTimeRoute on GoRouteData {
   static DateTimeRoute _fromState(GoRouterState state) => DateTimeRoute(
         requiredDateTimeField:
             DateTime.parse(state.pathParameters['requiredDateTimeField']!)!,
@@ -155,25 +176,32 @@ extension $DateTimeRouteExtension on DateTimeRoute {
             'date-time-field', state.uri.queryParameters, DateTime.tryParse),
       );
 
+  DateTimeRoute get _self => this as DateTimeRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/date-time-route/${Uri.encodeComponent(requiredDateTimeField.toString())}',
+        '/date-time-route/${Uri.encodeComponent(_self.requiredDateTimeField.toString())}',
         queryParams: {
-          if (dateTimeField != null)
-            'date-time-field': dateTimeField!.toString(),
+          if (_self.dateTimeField != null)
+            'date-time-field': _self.dateTimeField!.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $DoubleRouteExtension on DoubleRoute {
+mixin _$DoubleRoute on GoRouteData {
   static DoubleRoute _fromState(GoRouterState state) => DoubleRoute(
         requiredDoubleField:
             double.parse(state.pathParameters['requiredDoubleField']!)!,
@@ -186,27 +214,35 @@ extension $DoubleRouteExtension on DoubleRoute {
             1.0,
       );
 
+  DoubleRoute get _self => this as DoubleRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/double-route/${Uri.encodeComponent(requiredDoubleField.toString())}',
+        '/double-route/${Uri.encodeComponent(_self.requiredDoubleField.toString())}',
         queryParams: {
-          if (doubleField != null) 'double-field': doubleField!.toString(),
-          if (doubleFieldWithDefaultValue != 1.0)
+          if (_self.doubleField != null)
+            'double-field': _self.doubleField!.toString(),
+          if (_self.doubleFieldWithDefaultValue != 1.0)
             'double-field-with-default-value':
-                doubleFieldWithDefaultValue.toString(),
+                _self.doubleFieldWithDefaultValue.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $IntRouteExtension on IntRoute {
+mixin _$IntRoute on GoRouteData {
   static IntRoute _fromState(GoRouterState state) => IntRoute(
         requiredIntField: int.parse(state.pathParameters['requiredIntField']!)!,
         intField: _$convertMapValue(
@@ -218,26 +254,34 @@ extension $IntRouteExtension on IntRoute {
             1,
       );
 
+  IntRoute get _self => this as IntRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/int-route/${Uri.encodeComponent(requiredIntField.toString())}',
+        '/int-route/${Uri.encodeComponent(_self.requiredIntField.toString())}',
         queryParams: {
-          if (intField != null) 'int-field': intField!.toString(),
-          if (intFieldWithDefaultValue != 1)
-            'int-field-with-default-value': intFieldWithDefaultValue.toString(),
+          if (_self.intField != null) 'int-field': _self.intField!.toString(),
+          if (_self.intFieldWithDefaultValue != 1)
+            'int-field-with-default-value':
+                _self.intFieldWithDefaultValue.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $NumRouteExtension on NumRoute {
+mixin _$NumRoute on GoRouteData {
   static NumRoute _fromState(GoRouterState state) => NumRoute(
         requiredNumField: num.parse(state.pathParameters['requiredNumField']!)!,
         numField: _$convertMapValue(
@@ -249,26 +293,34 @@ extension $NumRouteExtension on NumRoute {
             1,
       );
 
+  NumRoute get _self => this as NumRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/num-route/${Uri.encodeComponent(requiredNumField.toString())}',
+        '/num-route/${Uri.encodeComponent(_self.requiredNumField.toString())}',
         queryParams: {
-          if (numField != null) 'num-field': numField!.toString(),
-          if (numFieldWithDefaultValue != 1)
-            'num-field-with-default-value': numFieldWithDefaultValue.toString(),
+          if (_self.numField != null) 'num-field': _self.numField!.toString(),
+          if (_self.numFieldWithDefaultValue != 1)
+            'num-field-with-default-value':
+                _self.numFieldWithDefaultValue.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $EnumRouteExtension on EnumRoute {
+mixin _$EnumRoute on GoRouteData {
   static EnumRoute _fromState(GoRouterState state) => EnumRoute(
         requiredEnumField: _$PersonDetailsEnumMap
             ._$fromName(state.pathParameters['requiredEnumField']!)!,
@@ -281,24 +333,31 @@ extension $EnumRouteExtension on EnumRoute {
             PersonDetails.favoriteFood,
       );
 
+  EnumRoute get _self => this as EnumRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/enum-route/${Uri.encodeComponent(_$PersonDetailsEnumMap[requiredEnumField]!)}',
+        '/enum-route/${Uri.encodeComponent(_$PersonDetailsEnumMap[_self.requiredEnumField]!)}',
         queryParams: {
-          if (enumField != null)
-            'enum-field': _$PersonDetailsEnumMap[enumField!],
-          if (enumFieldWithDefaultValue != PersonDetails.favoriteFood)
+          if (_self.enumField != null)
+            'enum-field': _$PersonDetailsEnumMap[_self.enumField!],
+          if (_self.enumFieldWithDefaultValue != PersonDetails.favoriteFood)
             'enum-field-with-default-value':
-                _$PersonDetailsEnumMap[enumFieldWithDefaultValue],
+                _$PersonDetailsEnumMap[_self.enumFieldWithDefaultValue],
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
@@ -308,7 +367,7 @@ const _$PersonDetailsEnumMap = {
   PersonDetails.favoriteSport: 'favorite-sport',
 };
 
-extension $EnhancedEnumRouteExtension on EnhancedEnumRoute {
+mixin _$EnhancedEnumRoute on GoRouteData {
   static EnhancedEnumRoute _fromState(GoRouterState state) => EnhancedEnumRoute(
         requiredEnumField: _$SportDetailsEnumMap
             ._$fromName(state.pathParameters['requiredEnumField']!)!,
@@ -321,24 +380,31 @@ extension $EnhancedEnumRouteExtension on EnhancedEnumRoute {
             SportDetails.football,
       );
 
+  EnhancedEnumRoute get _self => this as EnhancedEnumRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/enhanced-enum-route/${Uri.encodeComponent(_$SportDetailsEnumMap[requiredEnumField]!)}',
+        '/enhanced-enum-route/${Uri.encodeComponent(_$SportDetailsEnumMap[_self.requiredEnumField]!)}',
         queryParams: {
-          if (enumField != null)
-            'enum-field': _$SportDetailsEnumMap[enumField!],
-          if (enumFieldWithDefaultValue != SportDetails.football)
+          if (_self.enumField != null)
+            'enum-field': _$SportDetailsEnumMap[_self.enumField!],
+          if (_self.enumFieldWithDefaultValue != SportDetails.football)
             'enum-field-with-default-value':
-                _$SportDetailsEnumMap[enumFieldWithDefaultValue],
+                _$SportDetailsEnumMap[_self.enumFieldWithDefaultValue],
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
@@ -349,7 +415,7 @@ const _$SportDetailsEnumMap = {
   SportDetails.hockey: 'hockey',
 };
 
-extension $StringRouteExtension on StringRoute {
+mixin _$StringRoute on GoRouteData {
   static StringRoute _fromState(GoRouterState state) => StringRoute(
         requiredStringField: state.pathParameters['requiredStringField']!,
         stringField: state.uri.queryParameters['string-field'],
@@ -358,50 +424,65 @@ extension $StringRouteExtension on StringRoute {
                 'defaultValue',
       );
 
+  StringRoute get _self => this as StringRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/string-route/${Uri.encodeComponent(requiredStringField)}',
+        '/string-route/${Uri.encodeComponent(_self.requiredStringField)}',
         queryParams: {
-          if (stringField != null) 'string-field': stringField,
-          if (stringFieldWithDefaultValue != 'defaultValue')
-            'string-field-with-default-value': stringFieldWithDefaultValue,
+          if (_self.stringField != null) 'string-field': _self.stringField,
+          if (_self.stringFieldWithDefaultValue != 'defaultValue')
+            'string-field-with-default-value':
+                _self.stringFieldWithDefaultValue,
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $UriRouteExtension on UriRoute {
+mixin _$UriRoute on GoRouteData {
   static UriRoute _fromState(GoRouterState state) => UriRoute(
         requiredUriField: Uri.parse(state.pathParameters['requiredUriField']!)!,
         uriField: _$convertMapValue(
             'uri-field', state.uri.queryParameters, Uri.tryParse),
       );
 
+  UriRoute get _self => this as UriRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/uri-route/${Uri.encodeComponent(requiredUriField.toString())}',
+        '/uri-route/${Uri.encodeComponent(_self.requiredUriField.toString())}',
         queryParams: {
-          if (uriField != null) 'uri-field': uriField!.toString(),
+          if (_self.uriField != null) 'uri-field': _self.uriField!.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $IterableRouteExtension on IterableRoute {
+mixin _$IterableRoute on GoRouteData {
   static IterableRoute _fromState(GoRouterState state) => IterableRoute(
         intIterableField: (state.uri.queryParametersAll['int-iterable-field']
             ?.map(int.parse)
@@ -481,71 +562,84 @@ extension $IterableRouteExtension on IterableRoute {
             ?.toSet(),
       );
 
+  IterableRoute get _self => this as IterableRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/iterable-route',
         queryParams: {
-          if (intIterableField != null)
+          if (_self.intIterableField != null)
             'int-iterable-field':
-                intIterableField?.map((e) => e.toString()).toList(),
-          if (doubleIterableField != null)
+                _self.intIterableField?.map((e) => e.toString()).toList(),
+          if (_self.doubleIterableField != null)
             'double-iterable-field':
-                doubleIterableField?.map((e) => e.toString()).toList(),
-          if (stringIterableField != null)
+                _self.doubleIterableField?.map((e) => e.toString()).toList(),
+          if (_self.stringIterableField != null)
             'string-iterable-field':
-                stringIterableField?.map((e) => e).toList(),
-          if (boolIterableField != null)
+                _self.stringIterableField?.map((e) => e).toList(),
+          if (_self.boolIterableField != null)
             'bool-iterable-field':
-                boolIterableField?.map((e) => e.toString()).toList(),
-          if (enumIterableField != null)
-            'enum-iterable-field': enumIterableField
+                _self.boolIterableField?.map((e) => e.toString()).toList(),
+          if (_self.enumIterableField != null)
+            'enum-iterable-field': _self.enumIterableField
                 ?.map((e) => _$SportDetailsEnumMap[e])
                 .toList(),
-          if (enumOnlyInIterableField != null)
-            'enum-only-in-iterable-field': enumOnlyInIterableField
+          if (_self.enumOnlyInIterableField != null)
+            'enum-only-in-iterable-field': _self.enumOnlyInIterableField
                 ?.map((e) => _$CookingRecipeEnumMap[e])
                 .toList(),
-          if (intListField != null)
-            'int-list-field': intListField?.map((e) => e.toString()).toList(),
-          if (doubleListField != null)
+          if (_self.intListField != null)
+            'int-list-field':
+                _self.intListField?.map((e) => e.toString()).toList(),
+          if (_self.doubleListField != null)
             'double-list-field':
-                doubleListField?.map((e) => e.toString()).toList(),
-          if (stringListField != null)
-            'string-list-field': stringListField?.map((e) => e).toList(),
-          if (boolListField != null)
-            'bool-list-field': boolListField?.map((e) => e.toString()).toList(),
-          if (enumListField != null)
-            'enum-list-field':
-                enumListField?.map((e) => _$SportDetailsEnumMap[e]).toList(),
-          if (enumOnlyInListField != null)
-            'enum-only-in-list-field': enumOnlyInListField
+                _self.doubleListField?.map((e) => e.toString()).toList(),
+          if (_self.stringListField != null)
+            'string-list-field': _self.stringListField?.map((e) => e).toList(),
+          if (_self.boolListField != null)
+            'bool-list-field':
+                _self.boolListField?.map((e) => e.toString()).toList(),
+          if (_self.enumListField != null)
+            'enum-list-field': _self.enumListField
+                ?.map((e) => _$SportDetailsEnumMap[e])
+                .toList(),
+          if (_self.enumOnlyInListField != null)
+            'enum-only-in-list-field': _self.enumOnlyInListField
                 ?.map((e) => _$CookingRecipeEnumMap[e])
                 .toList(),
-          if (intSetField != null)
-            'int-set-field': intSetField?.map((e) => e.toString()).toList(),
-          if (doubleSetField != null)
+          if (_self.intSetField != null)
+            'int-set-field':
+                _self.intSetField?.map((e) => e.toString()).toList(),
+          if (_self.doubleSetField != null)
             'double-set-field':
-                doubleSetField?.map((e) => e.toString()).toList(),
-          if (stringSetField != null)
-            'string-set-field': stringSetField?.map((e) => e).toList(),
-          if (boolSetField != null)
-            'bool-set-field': boolSetField?.map((e) => e.toString()).toList(),
-          if (enumSetField != null)
-            'enum-set-field':
-                enumSetField?.map((e) => _$SportDetailsEnumMap[e]).toList(),
-          if (enumOnlyInSetField != null)
-            'enum-only-in-set-field': enumOnlyInSetField
+                _self.doubleSetField?.map((e) => e.toString()).toList(),
+          if (_self.stringSetField != null)
+            'string-set-field': _self.stringSetField?.map((e) => e).toList(),
+          if (_self.boolSetField != null)
+            'bool-set-field':
+                _self.boolSetField?.map((e) => e.toString()).toList(),
+          if (_self.enumSetField != null)
+            'enum-set-field': _self.enumSetField
+                ?.map((e) => _$SportDetailsEnumMap[e])
+                .toList(),
+          if (_self.enumOnlyInSetField != null)
+            'enum-only-in-set-field': _self.enumOnlyInSetField
                 ?.map((e) => _$CookingRecipeEnumMap[e])
                 .toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
@@ -555,8 +649,7 @@ const _$CookingRecipeEnumMap = {
   CookingRecipe.tacos: 'tacos',
 };
 
-extension $IterableRouteWithDefaultValuesExtension
-    on IterableRouteWithDefaultValues {
+mixin _$IterableRouteWithDefaultValues on GoRouteData {
   static IterableRouteWithDefaultValues _fromState(GoRouterState state) =>
       IterableRouteWithDefaultValues(
         intIterableField: (state.uri.queryParametersAll['int-iterable-field']
@@ -636,62 +729,80 @@ extension $IterableRouteWithDefaultValuesExtension
             const <SportDetails>{SportDetails.hockey},
       );
 
+  IterableRouteWithDefaultValues get _self =>
+      this as IterableRouteWithDefaultValues;
+
+  @override
   String get location => GoRouteData.$location(
         '/iterable-route-with-default-values',
         queryParams: {
-          if (!_$iterablesEqual(intIterableField, const <int>[0]))
+          if (!_$iterablesEqual(_self.intIterableField, const <int>[0]))
             'int-iterable-field':
-                intIterableField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(doubleIterableField, const <double>[0, 1, 2]))
+                _self.intIterableField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(
+              _self.doubleIterableField, const <double>[0, 1, 2]))
             'double-iterable-field':
-                doubleIterableField.map((e) => e.toString()).toList(),
+                _self.doubleIterableField.map((e) => e.toString()).toList(),
           if (!_$iterablesEqual(
-              stringIterableField, const <String>['defaultValue']))
-            'string-iterable-field': stringIterableField.map((e) => e).toList(),
-          if (!_$iterablesEqual(boolIterableField, const <bool>[false]))
+              _self.stringIterableField, const <String>['defaultValue']))
+            'string-iterable-field':
+                _self.stringIterableField.map((e) => e).toList(),
+          if (!_$iterablesEqual(_self.boolIterableField, const <bool>[false]))
             'bool-iterable-field':
-                boolIterableField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(enumIterableField,
+                _self.boolIterableField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.enumIterableField,
               const <SportDetails>[SportDetails.tennis, SportDetails.hockey]))
-            'enum-iterable-field':
-                enumIterableField.map((e) => _$SportDetailsEnumMap[e]).toList(),
-          if (!_$iterablesEqual(intListField, const <int>[0]))
-            'int-list-field': intListField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(doubleListField, const <double>[1, 2, 3]))
+            'enum-iterable-field': _self.enumIterableField
+                .map((e) => _$SportDetailsEnumMap[e])
+                .toList(),
+          if (!_$iterablesEqual(_self.intListField, const <int>[0]))
+            'int-list-field':
+                _self.intListField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.doubleListField, const <double>[1, 2, 3]))
             'double-list-field':
-                doubleListField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(stringListField,
+                _self.doubleListField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.stringListField,
               const <String>['defaultValue0', 'defaultValue1']))
-            'string-list-field': stringListField.map((e) => e).toList(),
-          if (!_$iterablesEqual(boolListField, const <bool>[true]))
-            'bool-list-field': boolListField.map((e) => e.toString()).toList(),
+            'string-list-field': _self.stringListField.map((e) => e).toList(),
+          if (!_$iterablesEqual(_self.boolListField, const <bool>[true]))
+            'bool-list-field':
+                _self.boolListField.map((e) => e.toString()).toList(),
           if (!_$iterablesEqual(
-              enumListField, const <SportDetails>[SportDetails.football]))
-            'enum-list-field':
-                enumListField.map((e) => _$SportDetailsEnumMap[e]).toList(),
-          if (!_$iterablesEqual(intSetField, const <int>{0, 1}))
-            'int-set-field': intSetField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(doubleSetField, const <double>{}))
+              _self.enumListField, const <SportDetails>[SportDetails.football]))
+            'enum-list-field': _self.enumListField
+                .map((e) => _$SportDetailsEnumMap[e])
+                .toList(),
+          if (!_$iterablesEqual(_self.intSetField, const <int>{0, 1}))
+            'int-set-field':
+                _self.intSetField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.doubleSetField, const <double>{}))
             'double-set-field':
-                doubleSetField.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(stringSetField, const <String>{'defaultValue'}))
-            'string-set-field': stringSetField.map((e) => e).toList(),
-          if (!_$iterablesEqual(boolSetField, const <bool>{true, false}))
-            'bool-set-field': boolSetField.map((e) => e.toString()).toList(),
+                _self.doubleSetField.map((e) => e.toString()).toList(),
           if (!_$iterablesEqual(
-              enumSetField, const <SportDetails>{SportDetails.hockey}))
-            'enum-set-field':
-                enumSetField.map((e) => _$SportDetailsEnumMap[e]).toList(),
+              _self.stringSetField, const <String>{'defaultValue'}))
+            'string-set-field': _self.stringSetField.map((e) => e).toList(),
+          if (!_$iterablesEqual(_self.boolSetField, const <bool>{true, false}))
+            'bool-set-field':
+                _self.boolSetField.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(
+              _self.enumSetField, const <SportDetails>{SportDetails.hockey}))
+            'enum-set-field': _self.enumSetField
+                .map((e) => _$SportDetailsEnumMap[e])
+                .toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/example/lib/case_sensitive_example.dart b/packages/go_router_builder/example/lib/case_sensitive_example.dart
index 579514064ea8..65d82e8790f9 100644
--- a/packages/go_router_builder/example/lib/case_sensitive_example.dart
+++ b/packages/go_router_builder/example/lib/case_sensitive_example.dart
@@ -28,7 +28,7 @@ class CaseSensitivityApp extends StatelessWidget {
 @TypedGoRoute<CaseSensitiveRoute>(
   path: '/case-sensitive',
 )
-class CaseSensitiveRoute extends GoRouteData {
+class CaseSensitiveRoute extends GoRouteData with _$CaseSensitiveRoute {
   const CaseSensitiveRoute();
 
   @override
@@ -41,7 +41,7 @@ class CaseSensitiveRoute extends GoRouteData {
   path: '/not-case-sensitive',
   caseSensitive: false,
 )
-class NotCaseSensitiveRoute extends GoRouteData {
+class NotCaseSensitiveRoute extends GoRouteData with _$NotCaseSensitiveRoute {
   const NotCaseSensitiveRoute();
 
   @override
diff --git a/packages/go_router_builder/example/lib/case_sensitive_example.g.dart b/packages/go_router_builder/example/lib/case_sensitive_example.g.dart
index e367ea7507cc..3c6a5b84e31c 100644
--- a/packages/go_router_builder/example/lib/case_sensitive_example.g.dart
+++ b/packages/go_router_builder/example/lib/case_sensitive_example.g.dart
@@ -15,47 +15,57 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $caseSensitiveRoute => GoRouteData.$route(
       path: '/case-sensitive',
-      factory: $CaseSensitiveRouteExtension._fromState,
+      factory: _$CaseSensitiveRoute._fromState,
     );
 
-extension $CaseSensitiveRouteExtension on CaseSensitiveRoute {
+mixin _$CaseSensitiveRoute on GoRouteData {
   static CaseSensitiveRoute _fromState(GoRouterState state) =>
       const CaseSensitiveRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/case-sensitive',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $notCaseSensitiveRoute => GoRouteData.$route(
       path: '/not-case-sensitive',
       caseSensitive: false,
-      factory: $NotCaseSensitiveRouteExtension._fromState,
+      factory: _$NotCaseSensitiveRoute._fromState,
     );
 
-extension $NotCaseSensitiveRouteExtension on NotCaseSensitiveRoute {
+mixin _$NotCaseSensitiveRoute on GoRouteData {
   static NotCaseSensitiveRoute _fromState(GoRouterState state) =>
       const NotCaseSensitiveRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/not-case-sensitive',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/extra_example.dart b/packages/go_router_builder/example/lib/extra_example.dart
index 33547b1a6466..5f281cd4e46f 100644
--- a/packages/go_router_builder/example/lib/extra_example.dart
+++ b/packages/go_router_builder/example/lib/extra_example.dart
@@ -34,7 +34,7 @@ class Extra {
 }
 
 @TypedGoRoute<RequiredExtraRoute>(path: '/requiredExtra')
-class RequiredExtraRoute extends GoRouteData {
+class RequiredExtraRoute extends GoRouteData with _$RequiredExtraRoute {
   const RequiredExtraRoute({required this.$extra});
 
   final Extra $extra;
@@ -59,7 +59,7 @@ class RequiredExtraScreen extends StatelessWidget {
 }
 
 @TypedGoRoute<OptionalExtraRoute>(path: '/optionalExtra')
-class OptionalExtraRoute extends GoRouteData {
+class OptionalExtraRoute extends GoRouteData with _$OptionalExtraRoute {
   const OptionalExtraRoute({this.$extra});
 
   final Extra? $extra;
@@ -84,7 +84,7 @@ class OptionalExtraScreen extends StatelessWidget {
 }
 
 @TypedGoRoute<SplashRoute>(path: '/splash')
-class SplashRoute extends GoRouteData {
+class SplashRoute extends GoRouteData with _$SplashRoute {
   const SplashRoute();
 
   @override
diff --git a/packages/go_router_builder/example/lib/extra_example.g.dart b/packages/go_router_builder/example/lib/extra_example.g.dart
index 7c43e54d2e58..1161326b103b 100644
--- a/packages/go_router_builder/example/lib/extra_example.g.dart
+++ b/packages/go_router_builder/example/lib/extra_example.g.dart
@@ -16,76 +16,95 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $requiredExtraRoute => GoRouteData.$route(
       path: '/requiredExtra',
-      factory: $RequiredExtraRouteExtension._fromState,
+      factory: _$RequiredExtraRoute._fromState,
     );
 
-extension $RequiredExtraRouteExtension on RequiredExtraRoute {
+mixin _$RequiredExtraRoute on GoRouteData {
   static RequiredExtraRoute _fromState(GoRouterState state) =>
       RequiredExtraRoute(
         $extra: state.extra as Extra,
       );
 
+  RequiredExtraRoute get _self => this as RequiredExtraRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/requiredExtra',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 RouteBase get $optionalExtraRoute => GoRouteData.$route(
       path: '/optionalExtra',
-      factory: $OptionalExtraRouteExtension._fromState,
+      factory: _$OptionalExtraRoute._fromState,
     );
 
-extension $OptionalExtraRouteExtension on OptionalExtraRoute {
+mixin _$OptionalExtraRoute on GoRouteData {
   static OptionalExtraRoute _fromState(GoRouterState state) =>
       OptionalExtraRoute(
         $extra: state.extra as Extra?,
       );
 
+  OptionalExtraRoute get _self => this as OptionalExtraRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/optionalExtra',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 RouteBase get $splashRoute => GoRouteData.$route(
       path: '/splash',
-      factory: $SplashRouteExtension._fromState,
+      factory: _$SplashRoute._fromState,
     );
 
-extension $SplashRouteExtension on SplashRoute {
+mixin _$SplashRoute on GoRouteData {
   static SplashRoute _fromState(GoRouterState state) => const SplashRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/splash',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/main.dart b/packages/go_router_builder/example/lib/main.dart
index d555649825ac..38136b17a9d0 100644
--- a/packages/go_router_builder/example/lib/main.dart
+++ b/packages/go_router_builder/example/lib/main.dart
@@ -80,7 +80,7 @@ class App extends StatelessWidget {
     TypedGoRoute<FamilyCountRoute>(path: 'family-count/:count'),
   ],
 )
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
@@ -90,7 +90,7 @@ class HomeRoute extends GoRouteData {
 @TypedGoRoute<LoginRoute>(
   path: '/login',
 )
-class LoginRoute extends GoRouteData {
+class LoginRoute extends GoRouteData with _$LoginRoute {
   const LoginRoute({this.fromPage});
 
   final String? fromPage;
@@ -100,7 +100,7 @@ class LoginRoute extends GoRouteData {
       LoginScreen(from: fromPage);
 }
 
-class FamilyRoute extends GoRouteData {
+class FamilyRoute extends GoRouteData with _$FamilyRoute {
   const FamilyRoute(this.fid);
 
   final String fid;
@@ -110,7 +110,7 @@ class FamilyRoute extends GoRouteData {
       FamilyScreen(family: familyById(fid));
 }
 
-class PersonRoute extends GoRouteData {
+class PersonRoute extends GoRouteData with _$PersonRoute {
   const PersonRoute(this.fid, this.pid);
 
   final String fid;
@@ -124,7 +124,7 @@ class PersonRoute extends GoRouteData {
   }
 }
 
-class PersonDetailsRoute extends GoRouteData {
+class PersonDetailsRoute extends GoRouteData with _$PersonDetailsRoute {
   const PersonDetailsRoute(this.fid, this.pid, this.details, {this.$extra});
 
   final String fid;
@@ -150,7 +150,7 @@ class PersonDetailsRoute extends GoRouteData {
   }
 }
 
-class FamilyCountRoute extends GoRouteData {
+class FamilyCountRoute extends GoRouteData with _$FamilyCountRoute {
   const FamilyCountRoute(this.count);
 
   final int count;
diff --git a/packages/go_router_builder/example/lib/main.g.dart b/packages/go_router_builder/example/lib/main.g.dart
index ab4cbdb3540c..f631d241cc01 100644
--- a/packages/go_router_builder/example/lib/main.g.dart
+++ b/packages/go_router_builder/example/lib/main.g.dart
@@ -15,19 +15,19 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $homeRoute => GoRouteData.$route(
       path: '/',
-      factory: $HomeRouteExtension._fromState,
+      factory: _$HomeRoute._fromState,
       routes: [
         GoRouteData.$route(
           path: 'family/:fid',
-          factory: $FamilyRouteExtension._fromState,
+          factory: _$FamilyRoute._fromState,
           routes: [
             GoRouteData.$route(
               path: 'person/:pid',
-              factory: $PersonRouteExtension._fromState,
+              factory: _$PersonRoute._fromState,
               routes: [
                 GoRouteData.$route(
                   path: 'details/:details',
-                  factory: $PersonDetailsRouteExtension._fromState,
+                  factory: _$PersonDetailsRoute._fromState,
                 ),
               ],
             ),
@@ -35,68 +35,87 @@ RouteBase get $homeRoute => GoRouteData.$route(
         ),
         GoRouteData.$route(
           path: 'family-count/:count',
-          factory: $FamilyCountRouteExtension._fromState,
+          factory: _$FamilyCountRoute._fromState,
         ),
       ],
     );
 
-extension $HomeRouteExtension on HomeRoute {
+mixin _$HomeRoute on GoRouteData {
   static HomeRoute _fromState(GoRouterState state) => const HomeRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $FamilyRouteExtension on FamilyRoute {
+mixin _$FamilyRoute on GoRouteData {
   static FamilyRoute _fromState(GoRouterState state) => FamilyRoute(
         state.pathParameters['fid']!,
       );
 
+  FamilyRoute get _self => this as FamilyRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family/${Uri.encodeComponent(fid)}',
+        '/family/${Uri.encodeComponent(_self.fid)}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $PersonRouteExtension on PersonRoute {
+mixin _$PersonRoute on GoRouteData {
   static PersonRoute _fromState(GoRouterState state) => PersonRoute(
         state.pathParameters['fid']!,
         int.parse(state.pathParameters['pid']!)!,
       );
 
+  PersonRoute get _self => this as PersonRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family/${Uri.encodeComponent(fid)}/person/${Uri.encodeComponent(pid.toString())}',
+        '/family/${Uri.encodeComponent(_self.fid)}/person/${Uri.encodeComponent(_self.pid.toString())}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $PersonDetailsRouteExtension on PersonDetailsRoute {
+mixin _$PersonDetailsRoute on GoRouteData {
   static PersonDetailsRoute _fromState(GoRouterState state) =>
       PersonDetailsRoute(
         state.pathParameters['fid']!,
@@ -105,20 +124,27 @@ extension $PersonDetailsRouteExtension on PersonDetailsRoute {
         $extra: state.extra as int?,
       );
 
+  PersonDetailsRoute get _self => this as PersonDetailsRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family/${Uri.encodeComponent(fid)}/person/${Uri.encodeComponent(pid.toString())}/details/${Uri.encodeComponent(_$PersonDetailsEnumMap[details]!)}',
+        '/family/${Uri.encodeComponent(_self.fid)}/person/${Uri.encodeComponent(_self.pid.toString())}/details/${Uri.encodeComponent(_$PersonDetailsEnumMap[_self.details]!)}',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 const _$PersonDetailsEnumMap = {
@@ -127,22 +153,29 @@ const _$PersonDetailsEnumMap = {
   PersonDetails.favoriteSport: 'favorite-sport',
 };
 
-extension $FamilyCountRouteExtension on FamilyCountRoute {
+mixin _$FamilyCountRoute on GoRouteData {
   static FamilyCountRoute _fromState(GoRouterState state) => FamilyCountRoute(
         int.parse(state.pathParameters['count']!)!,
       );
 
+  FamilyCountRoute get _self => this as FamilyCountRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family-count/${Uri.encodeComponent(count.toString())}',
+        '/family-count/${Uri.encodeComponent(_self.count.toString())}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
@@ -153,27 +186,34 @@ extension<T extends Enum> on Map<T, String> {
 
 RouteBase get $loginRoute => GoRouteData.$route(
       path: '/login',
-      factory: $LoginRouteExtension._fromState,
+      factory: _$LoginRoute._fromState,
     );
 
-extension $LoginRouteExtension on LoginRoute {
+mixin _$LoginRoute on GoRouteData {
   static LoginRoute _fromState(GoRouterState state) => LoginRoute(
         fromPage: state.uri.queryParameters['from-page'],
       );
 
+  LoginRoute get _self => this as LoginRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/login',
         queryParams: {
-          if (fromPage != null) 'from-page': fromPage,
+          if (_self.fromPage != null) 'from-page': _self.fromPage,
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/on_exit_example.dart b/packages/go_router_builder/example/lib/on_exit_example.dart
index b574c852c6e4..bbd8fea19bb1 100644
--- a/packages/go_router_builder/example/lib/on_exit_example.dart
+++ b/packages/go_router_builder/example/lib/on_exit_example.dart
@@ -29,14 +29,14 @@ class App extends StatelessWidget {
     TypedGoRoute<SubRoute>(path: 'sub-route')
   ],
 )
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
   Widget build(BuildContext context, GoRouterState state) => const HomeScreen();
 }
 
-class SubRoute extends GoRouteData {
+class SubRoute extends GoRouteData with _$SubRoute {
   const SubRoute();
 
   @override
diff --git a/packages/go_router_builder/example/lib/on_exit_example.g.dart b/packages/go_router_builder/example/lib/on_exit_example.g.dart
index 8a99156d8bfe..458ccc0371b2 100644
--- a/packages/go_router_builder/example/lib/on_exit_example.g.dart
+++ b/packages/go_router_builder/example/lib/on_exit_example.g.dart
@@ -14,45 +14,55 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $homeRoute => GoRouteData.$route(
       path: '/',
-      factory: $HomeRouteExtension._fromState,
+      factory: _$HomeRoute._fromState,
       routes: [
         GoRouteData.$route(
           path: 'sub-route',
-          factory: $SubRouteExtension._fromState,
+          factory: _$SubRoute._fromState,
         ),
       ],
     );
 
-extension $HomeRouteExtension on HomeRoute {
+mixin _$HomeRoute on GoRouteData {
   static HomeRoute _fromState(GoRouterState state) => const HomeRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $SubRouteExtension on SubRoute {
+mixin _$SubRoute on GoRouteData {
   static SubRoute _fromState(GoRouterState state) => const SubRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/sub-route',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/readme_excerpts.dart b/packages/go_router_builder/example/lib/readme_excerpts.dart
index 28eabdf1fa52..73577ef6452b 100644
--- a/packages/go_router_builder/example/lib/readme_excerpts.dart
+++ b/packages/go_router_builder/example/lib/readme_excerpts.dart
@@ -87,7 +87,7 @@ void otherDoc(BuildContext context) {
   ],
 )
 // #docregion HomeRoute
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
@@ -107,7 +107,7 @@ class RedirectRoute extends GoRouteData {
 
 // #docregion login
 @TypedGoRoute<LoginRoute>(path: '/login')
-class LoginRoute extends GoRouteData {
+class LoginRoute extends GoRouteData with _$LoginRoute {
   LoginRoute({this.from});
   final String? from;
 
@@ -142,7 +142,7 @@ class HomeScreen extends StatelessWidget {
   }
 }
 
-class FamilyRoute extends GoRouteData {
+class FamilyRoute extends GoRouteData with _$FamilyRoute {
   const FamilyRoute({this.fid});
 
   final String? fid;
@@ -218,7 +218,7 @@ class LoginScreen extends StatelessWidget {
 
 // #docregion MyRoute
 @TypedGoRoute<MyRoute>(path: '/my-route')
-class MyRoute extends GoRouteData {
+class MyRoute extends GoRouteData with _$MyRoute {
   MyRoute({this.queryParameter = 'defaultValue'});
   final String queryParameter;
 
@@ -245,7 +245,7 @@ class MyScreen extends StatelessWidget {
 
 @TypedGoRoute<PersonRouteWithExtra>(path: '/person')
 // #docregion PersonRouteWithExtra
-class PersonRouteWithExtra extends GoRouteData {
+class PersonRouteWithExtra extends GoRouteData with _$PersonRouteWithExtra {
   PersonRouteWithExtra(this.$extra);
   final Person? $extra;
 
@@ -272,7 +272,8 @@ class PersonScreen extends StatelessWidget {
 
 // #docregion HotdogRouteWithEverything
 @TypedGoRoute<HotdogRouteWithEverything>(path: '/:ketchup')
-class HotdogRouteWithEverything extends GoRouteData {
+class HotdogRouteWithEverything extends GoRouteData
+    with _$HotdogRouteWithEverything {
   HotdogRouteWithEverything(this.ketchup, this.mustard, this.$extra);
   final bool ketchup; // A required path parameter.
   final String? mustard; // An optional query parameter.
diff --git a/packages/go_router_builder/example/lib/readme_excerpts.g.dart b/packages/go_router_builder/example/lib/readme_excerpts.g.dart
index f6719844df60..41148c9230f5 100644
--- a/packages/go_router_builder/example/lib/readme_excerpts.g.dart
+++ b/packages/go_router_builder/example/lib/readme_excerpts.g.dart
@@ -18,140 +18,173 @@ List<RouteBase> get $appRoutes => [
 
 RouteBase get $homeRoute => GoRouteData.$route(
       path: '/',
-      factory: $HomeRouteExtension._fromState,
+      factory: _$HomeRoute._fromState,
       routes: [
         GoRouteData.$route(
           path: 'family/:fid',
-          factory: $FamilyRouteExtension._fromState,
+          factory: _$FamilyRoute._fromState,
         ),
       ],
     );
 
-extension $HomeRouteExtension on HomeRoute {
+mixin _$HomeRoute on GoRouteData {
   static HomeRoute _fromState(GoRouterState state) => const HomeRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $FamilyRouteExtension on FamilyRoute {
+mixin _$FamilyRoute on GoRouteData {
   static FamilyRoute _fromState(GoRouterState state) => FamilyRoute(
         fid: state.pathParameters['fid'],
       );
 
+  FamilyRoute get _self => this as FamilyRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family/${Uri.encodeComponent(fid ?? '')}',
+        '/family/${Uri.encodeComponent(_self.fid ?? '')}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $loginRoute => GoRouteData.$route(
       path: '/login',
-      factory: $LoginRouteExtension._fromState,
+      factory: _$LoginRoute._fromState,
     );
 
-extension $LoginRouteExtension on LoginRoute {
+mixin _$LoginRoute on GoRouteData {
   static LoginRoute _fromState(GoRouterState state) => LoginRoute(
         from: state.uri.queryParameters['from'],
       );
 
+  LoginRoute get _self => this as LoginRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/login',
         queryParams: {
-          if (from != null) 'from': from,
+          if (_self.from != null) 'from': _self.from,
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $myRoute => GoRouteData.$route(
       path: '/my-route',
-      factory: $MyRouteExtension._fromState,
+      factory: _$MyRoute._fromState,
     );
 
-extension $MyRouteExtension on MyRoute {
+mixin _$MyRoute on GoRouteData {
   static MyRoute _fromState(GoRouterState state) => MyRoute(
         queryParameter:
             state.uri.queryParameters['query-parameter'] ?? 'defaultValue',
       );
 
+  MyRoute get _self => this as MyRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/my-route',
         queryParams: {
-          if (queryParameter != 'defaultValue')
-            'query-parameter': queryParameter,
+          if (_self.queryParameter != 'defaultValue')
+            'query-parameter': _self.queryParameter,
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $personRouteWithExtra => GoRouteData.$route(
       path: '/person',
-      factory: $PersonRouteWithExtraExtension._fromState,
+      factory: _$PersonRouteWithExtra._fromState,
     );
 
-extension $PersonRouteWithExtraExtension on PersonRouteWithExtra {
+mixin _$PersonRouteWithExtra on GoRouteData {
   static PersonRouteWithExtra _fromState(GoRouterState state) =>
       PersonRouteWithExtra(
         state.extra as Person?,
       );
 
+  PersonRouteWithExtra get _self => this as PersonRouteWithExtra;
+
+  @override
   String get location => GoRouteData.$location(
         '/person',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 RouteBase get $hotdogRouteWithEverything => GoRouteData.$route(
       path: '/:ketchup',
-      factory: $HotdogRouteWithEverythingExtension._fromState,
+      factory: _$HotdogRouteWithEverything._fromState,
     );
 
-extension $HotdogRouteWithEverythingExtension on HotdogRouteWithEverything {
+mixin _$HotdogRouteWithEverything on GoRouteData {
   static HotdogRouteWithEverything _fromState(GoRouterState state) =>
       HotdogRouteWithEverything(
         _$boolConverter(state.pathParameters['ketchup']!)!,
@@ -159,23 +192,30 @@ extension $HotdogRouteWithEverythingExtension on HotdogRouteWithEverything {
         state.extra as Sauce,
       );
 
+  HotdogRouteWithEverything get _self => this as HotdogRouteWithEverything;
+
+  @override
   String get location => GoRouteData.$location(
-        '/${Uri.encodeComponent(ketchup.toString())}',
+        '/${Uri.encodeComponent(_self.ketchup.toString())}',
         queryParams: {
-          if (mustard != null) 'mustard': mustard,
+          if (_self.mustard != null) 'mustard': _self.mustard,
         },
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 bool _$boolConverter(String value) {
diff --git a/packages/go_router_builder/example/lib/shell_route_example.dart b/packages/go_router_builder/example/lib/shell_route_example.dart
index 93e1df207a88..fbbc078cf814 100644
--- a/packages/go_router_builder/example/lib/shell_route_example.dart
+++ b/packages/go_router_builder/example/lib/shell_route_example.dart
@@ -53,7 +53,7 @@ class MyShellRouteData extends ShellRouteData {
   }
 }
 
-class FooRouteData extends GoRouteData {
+class FooRouteData extends GoRouteData with _$FooRouteData {
   const FooRouteData();
 
   @override
@@ -62,7 +62,7 @@ class FooRouteData extends GoRouteData {
   }
 }
 
-class BarRouteData extends GoRouteData {
+class BarRouteData extends GoRouteData with _$BarRouteData {
   const BarRouteData();
 
   @override
@@ -133,7 +133,7 @@ class BarScreen extends StatelessWidget {
 }
 
 @TypedGoRoute<LoginRoute>(path: '/login')
-class LoginRoute extends GoRouteData {
+class LoginRoute extends GoRouteData with _$LoginRoute {
   const LoginRoute();
 
   @override
diff --git a/packages/go_router_builder/example/lib/shell_route_example.g.dart b/packages/go_router_builder/example/lib/shell_route_example.g.dart
index bc655746b619..0b2e61ebee34 100644
--- a/packages/go_router_builder/example/lib/shell_route_example.g.dart
+++ b/packages/go_router_builder/example/lib/shell_route_example.g.dart
@@ -18,11 +18,11 @@ RouteBase get $myShellRouteData => ShellRouteData.$route(
       routes: [
         GoRouteData.$route(
           path: '/foo',
-          factory: $FooRouteDataExtension._fromState,
+          factory: _$FooRouteData._fromState,
         ),
         GoRouteData.$route(
           path: '/bar',
-          factory: $BarRouteDataExtension._fromState,
+          factory: _$BarRouteData._fromState,
         ),
       ],
     );
@@ -32,58 +32,73 @@ extension $MyShellRouteDataExtension on MyShellRouteData {
       const MyShellRouteData();
 }
 
-extension $FooRouteDataExtension on FooRouteData {
+mixin _$FooRouteData on GoRouteData {
   static FooRouteData _fromState(GoRouterState state) => const FooRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/foo',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $BarRouteDataExtension on BarRouteData {
+mixin _$BarRouteData on GoRouteData {
   static BarRouteData _fromState(GoRouterState state) => const BarRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/bar',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $loginRoute => GoRouteData.$route(
       path: '/login',
-      factory: $LoginRouteExtension._fromState,
+      factory: _$LoginRoute._fromState,
     );
 
-extension $LoginRouteExtension on LoginRoute {
+mixin _$LoginRoute on GoRouteData {
   static LoginRoute _fromState(GoRouterState state) => const LoginRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/login',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/shell_route_with_keys_example.dart b/packages/go_router_builder/example/lib/shell_route_with_keys_example.dart
index 5448f7e19183..415a8f0b31b5 100644
--- a/packages/go_router_builder/example/lib/shell_route_with_keys_example.dart
+++ b/packages/go_router_builder/example/lib/shell_route_with_keys_example.dart
@@ -100,7 +100,7 @@ class MyShellRouteScreen extends StatelessWidget {
   }
 }
 
-class HomeRouteData extends GoRouteData {
+class HomeRouteData extends GoRouteData with _$HomeRouteData {
   const HomeRouteData();
 
   @override
@@ -109,7 +109,7 @@ class HomeRouteData extends GoRouteData {
   }
 }
 
-class UsersRouteData extends GoRouteData {
+class UsersRouteData extends GoRouteData with _$UsersRouteData {
   const UsersRouteData();
 
   @override
@@ -143,7 +143,7 @@ class DialogPage extends Page<void> {
   }
 }
 
-class UserRouteData extends GoRouteData {
+class UserRouteData extends GoRouteData with _$UserRouteData {
   const UserRouteData({required this.id});
 
   // Without this static key, the dialog will not cover the navigation rail.
diff --git a/packages/go_router_builder/example/lib/shell_route_with_keys_example.g.dart b/packages/go_router_builder/example/lib/shell_route_with_keys_example.g.dart
index 4a4cb4ff9a25..759588b2d286 100644
--- a/packages/go_router_builder/example/lib/shell_route_with_keys_example.g.dart
+++ b/packages/go_router_builder/example/lib/shell_route_with_keys_example.g.dart
@@ -18,16 +18,16 @@ RouteBase get $myShellRouteData => ShellRouteData.$route(
       routes: [
         GoRouteData.$route(
           path: '/home',
-          factory: $HomeRouteDataExtension._fromState,
+          factory: _$HomeRouteData._fromState,
         ),
         GoRouteData.$route(
           path: '/users',
-          factory: $UsersRouteDataExtension._fromState,
+          factory: _$UsersRouteData._fromState,
           routes: [
             GoRouteData.$route(
               path: ':id',
               parentNavigatorKey: UserRouteData.$parentNavigatorKey,
-              factory: $UserRouteDataExtension._fromState,
+              factory: _$UserRouteData._fromState,
             ),
           ],
         ),
@@ -39,56 +39,73 @@ extension $MyShellRouteDataExtension on MyShellRouteData {
       const MyShellRouteData();
 }
 
-extension $HomeRouteDataExtension on HomeRouteData {
+mixin _$HomeRouteData on GoRouteData {
   static HomeRouteData _fromState(GoRouterState state) => const HomeRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/home',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $UsersRouteDataExtension on UsersRouteData {
+mixin _$UsersRouteData on GoRouteData {
   static UsersRouteData _fromState(GoRouterState state) =>
       const UsersRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/users',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $UserRouteDataExtension on UserRouteData {
+mixin _$UserRouteData on GoRouteData {
   static UserRouteData _fromState(GoRouterState state) => UserRouteData(
         id: int.parse(state.pathParameters['id']!)!,
       );
 
+  UserRouteData get _self => this as UserRouteData;
+
+  @override
   String get location => GoRouteData.$location(
-        '/users/${Uri.encodeComponent(id.toString())}',
+        '/users/${Uri.encodeComponent(_self.id.toString())}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/shell_route_with_observers_example.dart b/packages/go_router_builder/example/lib/shell_route_with_observers_example.dart
index a69e05e749ef..326068ba8bc2 100644
--- a/packages/go_router_builder/example/lib/shell_route_with_observers_example.dart
+++ b/packages/go_router_builder/example/lib/shell_route_with_observers_example.dart
@@ -103,7 +103,7 @@ class MyShellRouteScreen extends StatelessWidget {
   }
 }
 
-class HomeRouteData extends GoRouteData {
+class HomeRouteData extends GoRouteData with _$HomeRouteData {
   const HomeRouteData();
 
   @override
@@ -112,7 +112,7 @@ class HomeRouteData extends GoRouteData {
   }
 }
 
-class UsersRouteData extends GoRouteData {
+class UsersRouteData extends GoRouteData with _$UsersRouteData {
   const UsersRouteData();
 
   @override
@@ -146,7 +146,7 @@ class DialogPage extends Page<void> {
   }
 }
 
-class UserRouteData extends GoRouteData {
+class UserRouteData extends GoRouteData with _$UserRouteData {
   const UserRouteData({required this.id});
 
   // Without this static key, the dialog will not cover the navigation rail.
diff --git a/packages/go_router_builder/example/lib/shell_route_with_observers_example.g.dart b/packages/go_router_builder/example/lib/shell_route_with_observers_example.g.dart
index 52d3c58f1cb7..e510a5f3a801 100644
--- a/packages/go_router_builder/example/lib/shell_route_with_observers_example.g.dart
+++ b/packages/go_router_builder/example/lib/shell_route_with_observers_example.g.dart
@@ -18,15 +18,15 @@ RouteBase get $myShellRouteData => ShellRouteData.$route(
       routes: [
         GoRouteData.$route(
           path: '/home',
-          factory: $HomeRouteDataExtension._fromState,
+          factory: _$HomeRouteData._fromState,
         ),
         GoRouteData.$route(
           path: '/users',
-          factory: $UsersRouteDataExtension._fromState,
+          factory: _$UsersRouteData._fromState,
           routes: [
             GoRouteData.$route(
               path: ':id',
-              factory: $UserRouteDataExtension._fromState,
+              factory: _$UserRouteData._fromState,
             ),
           ],
         ),
@@ -38,56 +38,73 @@ extension $MyShellRouteDataExtension on MyShellRouteData {
       const MyShellRouteData();
 }
 
-extension $HomeRouteDataExtension on HomeRouteData {
+mixin _$HomeRouteData on GoRouteData {
   static HomeRouteData _fromState(GoRouterState state) => const HomeRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/home',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $UsersRouteDataExtension on UsersRouteData {
+mixin _$UsersRouteData on GoRouteData {
   static UsersRouteData _fromState(GoRouterState state) =>
       const UsersRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/users',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $UserRouteDataExtension on UserRouteData {
+mixin _$UserRouteData on GoRouteData {
   static UserRouteData _fromState(GoRouterState state) => UserRouteData(
         id: int.parse(state.pathParameters['id']!)!,
       );
 
+  UserRouteData get _self => this as UserRouteData;
+
+  @override
   String get location => GoRouteData.$location(
-        '/users/${Uri.encodeComponent(id.toString())}',
+        '/users/${Uri.encodeComponent(_self.id.toString())}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/simple_example.dart b/packages/go_router_builder/example/lib/simple_example.dart
index bfef272b1861..a2e946c49e0c 100644
--- a/packages/go_router_builder/example/lib/simple_example.dart
+++ b/packages/go_router_builder/example/lib/simple_example.dart
@@ -32,14 +32,14 @@ class App extends StatelessWidget {
     TypedGoRoute<FamilyRoute>(path: 'family/:familyId')
   ],
 )
-class HomeRoute extends GoRouteData {
+class HomeRoute extends GoRouteData with _$HomeRoute {
   const HomeRoute();
 
   @override
   Widget build(BuildContext context, GoRouterState state) => const HomeScreen();
 }
 
-class FamilyRoute extends GoRouteData {
+class FamilyRoute extends GoRouteData with _$FamilyRoute {
   const FamilyRoute(this.familyId);
 
   final String familyId;
diff --git a/packages/go_router_builder/example/lib/simple_example.g.dart b/packages/go_router_builder/example/lib/simple_example.g.dart
index f87f0ac730cd..4ecd74e3cbfa 100644
--- a/packages/go_router_builder/example/lib/simple_example.g.dart
+++ b/packages/go_router_builder/example/lib/simple_example.g.dart
@@ -15,47 +15,59 @@ List<RouteBase> get $appRoutes => [
 RouteBase get $homeRoute => GoRouteData.$route(
       path: '/',
       name: 'Home',
-      factory: $HomeRouteExtension._fromState,
+      factory: _$HomeRoute._fromState,
       routes: [
         GoRouteData.$route(
           path: 'family/:familyId',
-          factory: $FamilyRouteExtension._fromState,
+          factory: _$FamilyRoute._fromState,
         ),
       ],
     );
 
-extension $HomeRouteExtension on HomeRoute {
+mixin _$HomeRoute on GoRouteData {
   static HomeRoute _fromState(GoRouterState state) => const HomeRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $FamilyRouteExtension on FamilyRoute {
+mixin _$FamilyRoute on GoRouteData {
   static FamilyRoute _fromState(GoRouterState state) => FamilyRoute(
         state.pathParameters['familyId']!,
       );
 
+  FamilyRoute get _self => this as FamilyRoute;
+
+  @override
   String get location => GoRouteData.$location(
-        '/family/${Uri.encodeComponent(familyId)}',
+        '/family/${Uri.encodeComponent(_self.familyId)}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/stateful_shell_route_example.dart b/packages/go_router_builder/example/lib/stateful_shell_route_example.dart
index ad5ba8c82fdd..6889403bc3ae 100644
--- a/packages/go_router_builder/example/lib/stateful_shell_route_example.dart
+++ b/packages/go_router_builder/example/lib/stateful_shell_route_example.dart
@@ -86,7 +86,7 @@ class BranchBData extends StatefulShellBranchData {
   static const String $restorationScopeId = 'restorationScopeId';
 }
 
-class DetailsARouteData extends GoRouteData {
+class DetailsARouteData extends GoRouteData with _$DetailsARouteData {
   const DetailsARouteData();
 
   @override
@@ -95,7 +95,7 @@ class DetailsARouteData extends GoRouteData {
   }
 }
 
-class DetailsBRouteData extends GoRouteData {
+class DetailsBRouteData extends GoRouteData with _$DetailsBRouteData {
   const DetailsBRouteData();
 
   @override
diff --git a/packages/go_router_builder/example/lib/stateful_shell_route_example.g.dart b/packages/go_router_builder/example/lib/stateful_shell_route_example.g.dart
index 9be15d9859a4..d0eaa8ddf6ac 100644
--- a/packages/go_router_builder/example/lib/stateful_shell_route_example.g.dart
+++ b/packages/go_router_builder/example/lib/stateful_shell_route_example.g.dart
@@ -21,7 +21,7 @@ RouteBase get $myShellRouteData => StatefulShellRouteData.$route(
           routes: [
             GoRouteData.$route(
               path: '/detailsA',
-              factory: $DetailsARouteDataExtension._fromState,
+              factory: _$DetailsARouteData._fromState,
             ),
           ],
         ),
@@ -31,7 +31,7 @@ RouteBase get $myShellRouteData => StatefulShellRouteData.$route(
           routes: [
             GoRouteData.$route(
               path: '/detailsB',
-              factory: $DetailsBRouteDataExtension._fromState,
+              factory: _$DetailsBRouteData._fromState,
             ),
           ],
         ),
@@ -43,38 +43,48 @@ extension $MyShellRouteDataExtension on MyShellRouteData {
       const MyShellRouteData();
 }
 
-extension $DetailsARouteDataExtension on DetailsARouteData {
+mixin _$DetailsARouteData on GoRouteData {
   static DetailsARouteData _fromState(GoRouterState state) =>
       const DetailsARouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/detailsA',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $DetailsBRouteDataExtension on DetailsBRouteData {
+mixin _$DetailsBRouteData on GoRouteData {
   static DetailsBRouteData _fromState(GoRouterState state) =>
       const DetailsBRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/detailsB',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.dart b/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.dart
index a944e7d0997a..0e05a36e9ad1 100644
--- a/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.dart
+++ b/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.dart
@@ -88,7 +88,7 @@ class OrdersShellBranchData extends StatefulShellBranchData {
   const OrdersShellBranchData();
 }
 
-class HomeRouteData extends GoRouteData {
+class HomeRouteData extends GoRouteData with _$HomeRouteData {
   const HomeRouteData();
 
   @override
@@ -103,7 +103,7 @@ enum NotificationsPageSection {
   archive,
 }
 
-class NotificationsRouteData extends GoRouteData {
+class NotificationsRouteData extends GoRouteData with _$NotificationsRouteData {
   const NotificationsRouteData({
     required this.section,
   });
@@ -118,7 +118,7 @@ class NotificationsRouteData extends GoRouteData {
   }
 }
 
-class OrdersRouteData extends GoRouteData {
+class OrdersRouteData extends GoRouteData with _$OrdersRouteData {
   const OrdersRouteData();
 
   @override
diff --git a/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.g.dart b/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.g.dart
index f86f360772d8..c7e63a1fc7ff 100644
--- a/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.g.dart
+++ b/packages/go_router_builder/example/lib/stateful_shell_route_initial_location_example.g.dart
@@ -19,7 +19,7 @@ RouteBase get $mainShellRouteData => StatefulShellRouteData.$route(
           routes: [
             GoRouteData.$route(
               path: '/home',
-              factory: $HomeRouteDataExtension._fromState,
+              factory: _$HomeRouteData._fromState,
             ),
           ],
         ),
@@ -28,7 +28,7 @@ RouteBase get $mainShellRouteData => StatefulShellRouteData.$route(
           routes: [
             GoRouteData.$route(
               path: '/notifications/:section',
-              factory: $NotificationsRouteDataExtension._fromState,
+              factory: _$NotificationsRouteData._fromState,
             ),
           ],
         ),
@@ -36,7 +36,7 @@ RouteBase get $mainShellRouteData => StatefulShellRouteData.$route(
           routes: [
             GoRouteData.$route(
               path: '/orders',
-              factory: $OrdersRouteDataExtension._fromState,
+              factory: _$OrdersRouteData._fromState,
             ),
           ],
         ),
@@ -48,41 +48,53 @@ extension $MainShellRouteDataExtension on MainShellRouteData {
       const MainShellRouteData();
 }
 
-extension $HomeRouteDataExtension on HomeRouteData {
+mixin _$HomeRouteData on GoRouteData {
   static HomeRouteData _fromState(GoRouterState state) => const HomeRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/home',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
-extension $NotificationsRouteDataExtension on NotificationsRouteData {
+mixin _$NotificationsRouteData on GoRouteData {
   static NotificationsRouteData _fromState(GoRouterState state) =>
       NotificationsRouteData(
         section: _$NotificationsPageSectionEnumMap
             ._$fromName(state.pathParameters['section']!)!,
       );
 
+  NotificationsRouteData get _self => this as NotificationsRouteData;
+
+  @override
   String get location => GoRouteData.$location(
-        '/notifications/${Uri.encodeComponent(_$NotificationsPageSectionEnumMap[section]!)}',
+        '/notifications/${Uri.encodeComponent(_$NotificationsPageSectionEnumMap[_self.section]!)}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
@@ -92,21 +104,26 @@ const _$NotificationsPageSectionEnumMap = {
   NotificationsPageSection.archive: 'archive',
 };
 
-extension $OrdersRouteDataExtension on OrdersRouteData {
+mixin _$OrdersRouteData on GoRouteData {
   static OrdersRouteData _fromState(GoRouterState state) =>
       const OrdersRouteData();
 
+  @override
   String get location => GoRouteData.$location(
         '/orders',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/lib/src/route_config.dart b/packages/go_router_builder/lib/src/route_config.dart
index 3e4c9175bd85..d95663d15acc 100644
--- a/packages/go_router_builder/lib/src/route_config.dart
+++ b/packages/go_router_builder/lib/src/route_config.dart
@@ -4,6 +4,7 @@
 
 import 'dart:collection';
 
+import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/nullability_suffix.dart';
@@ -237,9 +238,20 @@ class GoRouteConfig extends RouteBaseConfig {
         // here to ensure it matches Uri.encodeComponent nullability
         final DartType? type = _field(pathParameter)?.returnType;
 
-        final String value =
-            '\${Uri.encodeComponent(${_encodeFor(pathParameter)}${(type?.isEnum ?? false) ? '!' : (type?.isNullableType ?? false) ? "?? ''" : ''})}';
-        return MapEntry<String, String>(pathParameter, value);
+        final StringBuffer valueBuffer = StringBuffer();
+
+        valueBuffer.write(r'${Uri.encodeComponent(');
+        valueBuffer.write(_encodeFor(pathParameter));
+
+        if (type?.isEnum ?? false) {
+          valueBuffer.write('!');
+        } else if (type?.isNullableType ?? false) {
+          valueBuffer.write("?? ''");
+        }
+
+        valueBuffer.write(')}');
+
+        return MapEntry<String, String>(pathParameter, valueBuffer.toString());
       }),
     );
     final String location = patternToPath(_rawJoinedPath, pathParameters);
@@ -271,6 +283,16 @@ class GoRouteConfig extends RouteBaseConfig {
     return buffer.toString();
   }
 
+  String get _castedSelf {
+    if (_pathParams.isEmpty &&
+        _ctorQueryParams.isEmpty &&
+        _extraParam == null) {
+      return '';
+    }
+
+    return '\n$_className get $selfFieldName => this as $_className;\n';
+  }
+
   String _decodeFor(ParameterElement element) {
     if (element.isRequired) {
       if (element.type.nullabilitySuffix == NullabilitySuffix.question &&
@@ -328,7 +350,7 @@ class GoRouteConfig extends RouteBaseConfig {
           compareField(param, parameterName, param.defaultValueCode!),
         );
       } else if (param.type.isNullableType) {
-        conditions.add('$parameterName != null');
+        conditions.add('$selfFieldName.$parameterName != null');
       }
       String line = '';
       if (conditions.isNotEmpty) {
@@ -372,29 +394,49 @@ class GoRouteConfig extends RouteBaseConfig {
 
   @override
   Iterable<String> classDeclarations() => <String>[
-        _extensionDefinition,
+        _mixinDefinition,
         ..._enumDeclarations(),
       ];
 
-  String get _extensionDefinition => '''
-extension $_extensionName on $_className {
-  static $_className _fromState(GoRouterState state) $_fromStateConstructor
+  String get _mixinDefinition {
+    final bool hasMixin = getNodeDeclaration<ClassDeclaration>(routeDataClass)
+            ?.withClause
+            ?.mixinTypes
+            .any((NamedType e) => e.name2.toString() == _mixinName) ??
+        false;
 
-  String get location => GoRouteData.\$location($_locationArgs,$_locationQueryParams);
+    if (!hasMixin) {
+      throw InvalidGenerationSourceError(
+        'Missing mixin clause `with $_mixinName`',
+        element: routeDataClass,
+      );
+    }
 
+    return '''
+mixin $_mixinName on GoRouteData {
+  static $_className _fromState(GoRouterState state) $_fromStateConstructor
+  $_castedSelf
+  @override
+  String get location => GoRouteData.\$location($_locationArgs,$_locationQueryParams);
+  
+  @override
   void go(BuildContext context) =>
-      context.go(location${_extraParam != null ? ', extra: $extraFieldName' : ''});
-
+      context.go(location${_extraParam != null ? ', extra: $selfFieldName.$extraFieldName' : ''});
+  
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location${_extraParam != null ? ', extra: $extraFieldName' : ''});
-
+      context.push<T>(location${_extraParam != null ? ', extra: $selfFieldName.$extraFieldName' : ''});
+  
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location${_extraParam != null ? ', extra: $extraFieldName' : ''});
-
+      context.pushReplacement(location${_extraParam != null ? ', extra: $selfFieldName.$extraFieldName' : ''});
+  
+  @override
   void replace(BuildContext context) =>
-      context.replace(location${_extraParam != null ? ', extra: $extraFieldName' : ''});
+      context.replace(location${_extraParam != null ? ', extra: $selfFieldName.$extraFieldName' : ''});
 }
 ''';
+  }
 
   /// Returns code representing the constant maps that contain the `enum` to
   /// [String] mapping for each referenced enum.
@@ -420,8 +462,7 @@ extension $_extensionName on $_className {
   }
 
   @override
-  String get factorConstructorParameters =>
-      'factory: $_extensionName._fromState,';
+  String get factorConstructorParameters => 'factory: $_mixinName._fromState,';
 
   @override
   String get routeConstructorParameters => '''
@@ -688,6 +729,8 @@ RouteBase get $_routeGetterName => ${_invokesRouteConstructor()};
 
   String get _className => routeDataClass.name;
 
+  String get _mixinName => '_\$$_className';
+
   String get _extensionName => '\$${_className}Extension';
 
   String _invokesRouteConstructor() {
diff --git a/packages/go_router_builder/lib/src/type_helpers.dart b/packages/go_router_builder/lib/src/type_helpers.dart
index ecf7bbd30677..5f809c335d37 100644
--- a/packages/go_router_builder/lib/src/type_helpers.dart
+++ b/packages/go_router_builder/lib/src/type_helpers.dart
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:analyzer/dart/analysis/results.dart';
+import 'package:analyzer/dart/analysis/session.dart';
+import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:source_gen/source_gen.dart';
@@ -25,6 +28,9 @@ const String enumExtensionHelperName = r'_$fromName';
 /// be passed to a route.
 const String extraFieldName = r'$extra';
 
+/// The name of the generated, private getter for casting `this` (the mixin) to the class type.
+const String selfFieldName = '_self';
+
 /// Shared start of error message related to a likely code issue.
 const String likelyIssueMessage = 'Should never get here! File an issue!';
 
@@ -79,7 +85,8 @@ String decodeParameter(ParameterElement element, Set<String> pathParameters) {
 String encodeField(PropertyAccessorElement element) {
   for (final _TypeHelper helper in _helpers) {
     if (helper._matchesType(element.returnType)) {
-      return helper._encode(element.name, element.returnType);
+      return helper._encode(
+          '$selfFieldName.${element.name}', element.returnType);
     }
   }
 
@@ -89,13 +96,30 @@ String encodeField(PropertyAccessorElement element) {
   );
 }
 
+/// Returns an AstNode type from a InterfaceElement.
+T? getNodeDeclaration<T extends AstNode>(InterfaceElement element) {
+  final AnalysisSession? session = element.session;
+  if (session == null) {
+    return null;
+  }
+
+  final ParsedLibraryResult parsedLibrary =
+      session.getParsedLibraryByElement(element.library) as ParsedLibraryResult;
+  final ElementDeclarationResult? declaration =
+      parsedLibrary.getElementDeclaration(element);
+  final AstNode? node = declaration?.node;
+
+  return node is T ? node : null;
+}
+
 /// Returns the comparison of a parameter with its default value.
 ///
 /// Otherwise, throws an [InvalidGenerationSourceError].
 String compareField(ParameterElement param, String value1, String value2) {
   for (final _TypeHelper helper in _helpers) {
     if (helper._matchesType(param.type)) {
-      return helper._compare(param.name, param.defaultValueCode!);
+      return helper._compare(
+          '$selfFieldName.${param.name}', param.defaultValueCode!);
     }
   }
 
diff --git a/packages/go_router_builder/pubspec.yaml b/packages/go_router_builder/pubspec.yaml
index 567f8f7808bf..aeb819b55dce 100644
--- a/packages/go_router_builder/pubspec.yaml
+++ b/packages/go_router_builder/pubspec.yaml
@@ -2,7 +2,7 @@ name: go_router_builder
 description: >-
   A builder that supports generated strongly-typed route helpers for
   package:go_router
-version: 2.9.1
+version: 3.0.0
 repository: https://github.com/flutter/packages/tree/main/packages/go_router_builder
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+go_router_builder%22
 
diff --git a/packages/go_router_builder/test_inputs/bad_path_pattern.dart b/packages/go_router_builder/test_inputs/bad_path_pattern.dart
index b6c6012ecbb7..8f2d00a0f81a 100644
--- a/packages/go_router_builder/test_inputs/bad_path_pattern.dart
+++ b/packages/go_router_builder/test_inputs/bad_path_pattern.dart
@@ -4,5 +4,7 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$BadPathParam {}
+
 @TypedGoRoute<BadPathParam>(path: 'bob/:id')
-class BadPathParam extends GoRouteData {}
+class BadPathParam extends GoRouteData with _$BadPathParam {}
diff --git a/packages/go_router_builder/test_inputs/case_sensitivity.dart b/packages/go_router_builder/test_inputs/case_sensitivity.dart
index 44066f2bee99..d14feedbc70e 100644
--- a/packages/go_router_builder/test_inputs/case_sensitivity.dart
+++ b/packages/go_router_builder/test_inputs/case_sensitivity.dart
@@ -4,11 +4,14 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$CaseSensitiveRoute {}
+mixin _$NotCaseSensitiveRoute {}
+
 @TypedGoRoute<CaseSensitiveRoute>(path: '/case-sensitive-route')
-class CaseSensitiveRoute extends GoRouteData {}
+class CaseSensitiveRoute extends GoRouteData with _$CaseSensitiveRoute {}
 
 @TypedGoRoute<NotCaseSensitiveRoute>(
   path: '/not-case-sensitive-route',
   caseSensitive: false,
 )
-class NotCaseSensitiveRoute extends GoRouteData {}
+class NotCaseSensitiveRoute extends GoRouteData with _$NotCaseSensitiveRoute {}
diff --git a/packages/go_router_builder/test_inputs/case_sensitivity.dart.expect b/packages/go_router_builder/test_inputs/case_sensitivity.dart.expect
index 15f764162865..acbc044d5bf0 100644
--- a/packages/go_router_builder/test_inputs/case_sensitivity.dart.expect
+++ b/packages/go_router_builder/test_inputs/case_sensitivity.dart.expect
@@ -1,46 +1,56 @@
 RouteBase get $caseSensitiveRoute => GoRouteData.$route(
       path: '/case-sensitive-route',
-      factory: $CaseSensitiveRouteExtension._fromState,
+      factory: _$CaseSensitiveRoute._fromState,
     );
 
-extension $CaseSensitiveRouteExtension on CaseSensitiveRoute {
+mixin _$CaseSensitiveRoute on GoRouteData {
   static CaseSensitiveRoute _fromState(GoRouterState state) =>
       CaseSensitiveRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/case-sensitive-route',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
 RouteBase get $notCaseSensitiveRoute => GoRouteData.$route(
       path: '/not-case-sensitive-route',
       caseSensitive: false,
-      factory: $NotCaseSensitiveRouteExtension._fromState,
+      factory: _$NotCaseSensitiveRoute._fromState,
     );
 
-extension $NotCaseSensitiveRouteExtension on NotCaseSensitiveRoute {
+mixin _$NotCaseSensitiveRoute on GoRouteData {
   static NotCaseSensitiveRoute _fromState(GoRouterState state) =>
       NotCaseSensitiveRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/not-case-sensitive-route',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/test_inputs/default_value.dart b/packages/go_router_builder/test_inputs/default_value.dart
index 209e7f4f52f3..3d04653b7aab 100644
--- a/packages/go_router_builder/test_inputs/default_value.dart
+++ b/packages/go_router_builder/test_inputs/default_value.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$DefaultValueRoute {}
+
 @TypedGoRoute<DefaultValueRoute>(path: '/default-value-route')
-class DefaultValueRoute extends GoRouteData {
+class DefaultValueRoute extends GoRouteData with _$DefaultValueRoute {
   DefaultValueRoute({this.param = 0});
   final int param;
 }
diff --git a/packages/go_router_builder/test_inputs/default_value.dart.expect b/packages/go_router_builder/test_inputs/default_value.dart.expect
index 9d9d5e8ec83b..9302c4b2346c 100644
--- a/packages/go_router_builder/test_inputs/default_value.dart.expect
+++ b/packages/go_router_builder/test_inputs/default_value.dart.expect
@@ -1,29 +1,36 @@
 RouteBase get $defaultValueRoute => GoRouteData.$route(
       path: '/default-value-route',
-      factory: $DefaultValueRouteExtension._fromState,
+      factory: _$DefaultValueRoute._fromState,
     );
 
-extension $DefaultValueRouteExtension on DefaultValueRoute {
+mixin _$DefaultValueRoute on GoRouteData {
   static DefaultValueRoute _fromState(GoRouterState state) => DefaultValueRoute(
         param:
             _$convertMapValue('param', state.uri.queryParameters, int.parse) ??
                 0,
       );
 
+  DefaultValueRoute get _self => this as DefaultValueRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/default-value-route',
         queryParams: {
-          if (param != 0) 'param': param.toString(),
+          if (_self.param != 0) 'param': _self.param.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/enum_parameter.dart b/packages/go_router_builder/test_inputs/enum_parameter.dart
index 72b41486b881..ce1492338bb3 100644
--- a/packages/go_router_builder/test_inputs/enum_parameter.dart
+++ b/packages/go_router_builder/test_inputs/enum_parameter.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$EnumParam {}
+
 @TypedGoRoute<EnumParam>(path: '/:y')
-class EnumParam extends GoRouteData {
+class EnumParam extends GoRouteData with _$EnumParam {
   EnumParam({required this.y});
   final EnumTest y;
 }
diff --git a/packages/go_router_builder/test_inputs/enum_parameter.dart.expect b/packages/go_router_builder/test_inputs/enum_parameter.dart.expect
index 42d27809f85a..341e1bab2824 100644
--- a/packages/go_router_builder/test_inputs/enum_parameter.dart.expect
+++ b/packages/go_router_builder/test_inputs/enum_parameter.dart.expect
@@ -1,24 +1,31 @@
 RouteBase get $enumParam => GoRouteData.$route(
       path: '/:y',
-      factory: $EnumParamExtension._fromState,
+      factory: _$EnumParam._fromState,
     );
 
-extension $EnumParamExtension on EnumParam {
+mixin _$EnumParam on GoRouteData {
   static EnumParam _fromState(GoRouterState state) => EnumParam(
         y: _$EnumTestEnumMap._$fromName(state.pathParameters['y']!)!,
       );
 
+  EnumParam get _self => this as EnumParam;
+
+  @override
   String get location => GoRouteData.$location(
-        '/${Uri.encodeComponent(_$EnumTestEnumMap[y]!)}',
+        '/${Uri.encodeComponent(_$EnumTestEnumMap[_self.y]!)}',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/extra_value.dart b/packages/go_router_builder/test_inputs/extra_value.dart
index 60e809172125..3951bea53292 100644
--- a/packages/go_router_builder/test_inputs/extra_value.dart
+++ b/packages/go_router_builder/test_inputs/extra_value.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$ExtraValueRoute {}
+
 @TypedGoRoute<ExtraValueRoute>(path: '/default-value-route')
-class ExtraValueRoute extends GoRouteData {
+class ExtraValueRoute extends GoRouteData with _$ExtraValueRoute {
   ExtraValueRoute({this.param = 0, this.$extra});
   final int param;
   final int? $extra;
diff --git a/packages/go_router_builder/test_inputs/extra_value.dart.expect b/packages/go_router_builder/test_inputs/extra_value.dart.expect
index fccced1ce011..944b8a4b25c6 100644
--- a/packages/go_router_builder/test_inputs/extra_value.dart.expect
+++ b/packages/go_router_builder/test_inputs/extra_value.dart.expect
@@ -1,9 +1,9 @@
 RouteBase get $extraValueRoute => GoRouteData.$route(
       path: '/default-value-route',
-      factory: $ExtraValueRouteExtension._fromState,
+      factory: _$ExtraValueRoute._fromState,
     );
 
-extension $ExtraValueRouteExtension on ExtraValueRoute {
+mixin _$ExtraValueRoute on GoRouteData {
   static ExtraValueRoute _fromState(GoRouterState state) => ExtraValueRoute(
         param:
             _$convertMapValue('param', state.uri.queryParameters, int.parse) ??
@@ -11,23 +11,30 @@ extension $ExtraValueRouteExtension on ExtraValueRoute {
         $extra: state.extra as int?,
       );
 
+  ExtraValueRoute get _self => this as ExtraValueRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/default-value-route',
         queryParams: {
-          if (param != 0) 'param': param.toString(),
+          if (_self.param != 0) 'param': _self.param.toString(),
         },
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
 
 T? _$convertMapValue<T>(
diff --git a/packages/go_router_builder/test_inputs/iterable_with_default_value.dart b/packages/go_router_builder/test_inputs/iterable_with_default_value.dart
index 3abd7a923185..01b09784d259 100644
--- a/packages/go_router_builder/test_inputs/iterable_with_default_value.dart
+++ b/packages/go_router_builder/test_inputs/iterable_with_default_value.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$IterableDefaultValueRoute {}
+
 @TypedGoRoute<IterableDefaultValueRoute>(path: '/iterable-default-value-route')
-class IterableDefaultValueRoute extends GoRouteData {
+class IterableDefaultValueRoute extends GoRouteData
+    with _$IterableDefaultValueRoute {
   IterableDefaultValueRoute({this.param = const <int>[0]});
   final Iterable<int> param;
 }
diff --git a/packages/go_router_builder/test_inputs/iterable_with_default_value.dart.expect b/packages/go_router_builder/test_inputs/iterable_with_default_value.dart.expect
index 683a64ec7cab..35e4cb75fb5f 100644
--- a/packages/go_router_builder/test_inputs/iterable_with_default_value.dart.expect
+++ b/packages/go_router_builder/test_inputs/iterable_with_default_value.dart.expect
@@ -1,9 +1,9 @@
 RouteBase get $iterableDefaultValueRoute => GoRouteData.$route(
       path: '/iterable-default-value-route',
-      factory: $IterableDefaultValueRouteExtension._fromState,
+      factory: _$IterableDefaultValueRoute._fromState,
     );
 
-extension $IterableDefaultValueRouteExtension on IterableDefaultValueRoute {
+mixin _$IterableDefaultValueRoute on GoRouteData {
   static IterableDefaultValueRoute _fromState(GoRouterState state) =>
       IterableDefaultValueRoute(
         param: (state.uri.queryParametersAll['param']
@@ -12,21 +12,28 @@ extension $IterableDefaultValueRouteExtension on IterableDefaultValueRoute {
             const <int>[0],
       );
 
+  IterableDefaultValueRoute get _self => this as IterableDefaultValueRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/iterable-default-value-route',
         queryParams: {
-          if (!_$iterablesEqual(param, const <int>[0]))
-            'param': param.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.param, const <int>[0]))
+            'param': _self.param.map((e) => e.toString()).toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/iterable_with_enum.dart b/packages/go_router_builder/test_inputs/iterable_with_enum.dart
index afdb7689c7b2..0c0543ca2895 100644
--- a/packages/go_router_builder/test_inputs/iterable_with_enum.dart
+++ b/packages/go_router_builder/test_inputs/iterable_with_enum.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$IterableWithEnumRoute {}
+
 @TypedGoRoute<IterableWithEnumRoute>(path: '/iterable-with-enum')
-class IterableWithEnumRoute extends GoRouteData {
+class IterableWithEnumRoute extends GoRouteData with _$IterableWithEnumRoute {
   IterableWithEnumRoute({this.param});
 
   final Iterable<EnumOnlyUsedInIterable>? param;
diff --git a/packages/go_router_builder/test_inputs/iterable_with_enum.dart.expect b/packages/go_router_builder/test_inputs/iterable_with_enum.dart.expect
index 88a9f97dc273..ef7fd9fec7c6 100644
--- a/packages/go_router_builder/test_inputs/iterable_with_enum.dart.expect
+++ b/packages/go_router_builder/test_inputs/iterable_with_enum.dart.expect
@@ -1,9 +1,9 @@
 RouteBase get $iterableWithEnumRoute => GoRouteData.$route(
       path: '/iterable-with-enum',
-      factory: $IterableWithEnumRouteExtension._fromState,
+      factory: _$IterableWithEnumRoute._fromState,
     );
 
-extension $IterableWithEnumRouteExtension on IterableWithEnumRoute {
+mixin _$IterableWithEnumRoute on GoRouteData {
   static IterableWithEnumRoute _fromState(GoRouterState state) =>
       IterableWithEnumRoute(
         param: (state.uri.queryParametersAll['param']
@@ -12,22 +12,30 @@ extension $IterableWithEnumRouteExtension on IterableWithEnumRoute {
             as Iterable<EnumOnlyUsedInIterable>?),
       );
 
+  IterableWithEnumRoute get _self => this as IterableWithEnumRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/iterable-with-enum',
         queryParams: {
-          if (param != null)
-            'param':
-                param?.map((e) => _$EnumOnlyUsedInIterableEnumMap[e]).toList(),
+          if (_self.param != null)
+            'param': _self.param
+                ?.map((e) => _$EnumOnlyUsedInIterableEnumMap[e])
+                .toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/list.dart b/packages/go_router_builder/test_inputs/list.dart
index e7b3e3d975dd..07762f57bfb5 100644
--- a/packages/go_router_builder/test_inputs/list.dart
+++ b/packages/go_router_builder/test_inputs/list.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$ListRoute {}
+
 @TypedGoRoute<ListRoute>(path: '/list-route')
-class ListRoute extends GoRouteData {
+class ListRoute extends GoRouteData with _$ListRoute {
   ListRoute({
     required this.ids,
     this.nullableIds,
diff --git a/packages/go_router_builder/test_inputs/list.dart.expect b/packages/go_router_builder/test_inputs/list.dart.expect
index bd7563141842..abe23c4c4f1f 100644
--- a/packages/go_router_builder/test_inputs/list.dart.expect
+++ b/packages/go_router_builder/test_inputs/list.dart.expect
@@ -1,9 +1,9 @@
 RouteBase get $listRoute => GoRouteData.$route(
       path: '/list-route',
-      factory: $ListRouteExtension._fromState,
+      factory: _$ListRoute._fromState,
     );
 
-extension $ListRouteExtension on ListRoute {
+mixin _$ListRoute on GoRouteData {
   static ListRoute _fromState(GoRouterState state) => ListRoute(
         ids: (state.uri.queryParametersAll['ids']
                     ?.map(int.parse)
@@ -25,25 +25,33 @@ extension $ListRouteExtension on ListRoute {
             const <int>[0],
       );
 
+  ListRoute get _self => this as ListRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/list-route',
         queryParams: {
-          'ids': ids.map((e) => e.toString()).toList(),
-          if (nullableIds != null)
-            'nullable-ids': nullableIds?.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(idsWithDefaultValue, const <int>[0]))
+          'ids': _self.ids.map((e) => e.toString()).toList(),
+          if (_self.nullableIds != null)
+            'nullable-ids':
+                _self.nullableIds?.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.idsWithDefaultValue, const <int>[0]))
             'ids-with-default-value':
-                idsWithDefaultValue.map((e) => e.toString()).toList(),
+                _self.idsWithDefaultValue.map((e) => e.toString()).toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/missing_type_annotation.dart b/packages/go_router_builder/test_inputs/missing_type_annotation.dart
index 2b3ff58dda56..93e65ea6b889 100644
--- a/packages/go_router_builder/test_inputs/missing_type_annotation.dart
+++ b/packages/go_router_builder/test_inputs/missing_type_annotation.dart
@@ -4,5 +4,7 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$MissingTypeAnnotation {}
+
 @TypedGoRoute(path: 'bob')
-class MissingTypeAnnotation extends GoRouteData {}
+class MissingTypeAnnotation extends GoRouteData with _$MissingTypeAnnotation {}
diff --git a/packages/go_router_builder/test_inputs/named_escaped_route.dart b/packages/go_router_builder/test_inputs/named_escaped_route.dart
index eb5e26bc563e..6222aa74873a 100644
--- a/packages/go_router_builder/test_inputs/named_escaped_route.dart
+++ b/packages/go_router_builder/test_inputs/named_escaped_route.dart
@@ -4,5 +4,7 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NamedEscapedRoute {}
+
 @TypedGoRoute<NamedEscapedRoute>(path: '/named-route', name: r'named$Route')
-class NamedEscapedRoute extends GoRouteData {}
+class NamedEscapedRoute extends GoRouteData with _$NamedEscapedRoute {}
diff --git a/packages/go_router_builder/test_inputs/named_escaped_route.dart.expect b/packages/go_router_builder/test_inputs/named_escaped_route.dart.expect
index e4d75ec81631..df9ab5f52d58 100644
--- a/packages/go_router_builder/test_inputs/named_escaped_route.dart.expect
+++ b/packages/go_router_builder/test_inputs/named_escaped_route.dart.expect
@@ -1,23 +1,28 @@
 RouteBase get $namedEscapedRoute => GoRouteData.$route(
       path: '/named-route',
       name: r'named$Route',
-      factory: $NamedEscapedRouteExtension._fromState,
+      factory: _$NamedEscapedRoute._fromState,
     );
 
-extension $NamedEscapedRouteExtension on NamedEscapedRoute {
+mixin _$NamedEscapedRoute on GoRouteData {
   static NamedEscapedRoute _fromState(GoRouterState state) =>
       NamedEscapedRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/named-route',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/test_inputs/named_route.dart b/packages/go_router_builder/test_inputs/named_route.dart
index 3e45f7e476f4..449b9537c6db 100644
--- a/packages/go_router_builder/test_inputs/named_route.dart
+++ b/packages/go_router_builder/test_inputs/named_route.dart
@@ -4,5 +4,7 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NamedRoute {}
+
 @TypedGoRoute<NamedRoute>(path: '/named-route', name: 'namedRoute')
-class NamedRoute extends GoRouteData {}
+class NamedRoute extends GoRouteData with _$NamedRoute {}
diff --git a/packages/go_router_builder/test_inputs/named_route.dart.expect b/packages/go_router_builder/test_inputs/named_route.dart.expect
index 9d4b705530cf..b3cf1c42c42f 100644
--- a/packages/go_router_builder/test_inputs/named_route.dart.expect
+++ b/packages/go_router_builder/test_inputs/named_route.dart.expect
@@ -1,22 +1,27 @@
 RouteBase get $namedRoute => GoRouteData.$route(
       path: '/named-route',
       name: 'namedRoute',
-      factory: $NamedRouteExtension._fromState,
+      factory: _$NamedRoute._fromState,
     );
 
-extension $NamedRouteExtension on NamedRoute {
+mixin _$NamedRoute on GoRouteData {
   static NamedRoute _fromState(GoRouterState state) => NamedRoute();
 
+  @override
   String get location => GoRouteData.$location(
         '/named-route',
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/test_inputs/no_mixin.dart b/packages/go_router_builder/test_inputs/no_mixin.dart
new file mode 100644
index 000000000000..b894313adb1f
--- /dev/null
+++ b/packages/go_router_builder/test_inputs/no_mixin.dart
@@ -0,0 +1,8 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:go_router/go_router.dart';
+
+@TypedGoRoute<HomeRoute>(path: '/')
+class HomeRoute extends GoRouteData {}
diff --git a/packages/go_router_builder/test_inputs/no_mixin.dart.expect b/packages/go_router_builder/test_inputs/no_mixin.dart.expect
new file mode 100644
index 000000000000..dc98f351c1fa
--- /dev/null
+++ b/packages/go_router_builder/test_inputs/no_mixin.dart.expect
@@ -0,0 +1 @@
+Missing mixin clause `with _$HomeRoute`
diff --git a/packages/go_router_builder/test_inputs/nullable_default_value.dart b/packages/go_router_builder/test_inputs/nullable_default_value.dart
index dcf2ea8e9f1b..b41f5733e01e 100644
--- a/packages/go_router_builder/test_inputs/nullable_default_value.dart
+++ b/packages/go_router_builder/test_inputs/nullable_default_value.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NullableDefaultValueRoute {}
+
 @TypedGoRoute<NullableDefaultValueRoute>(path: '/nullable-default-value-route')
-class NullableDefaultValueRoute extends GoRouteData {
+class NullableDefaultValueRoute extends GoRouteData
+    with _$NullableDefaultValueRoute {
   NullableDefaultValueRoute({this.param = 0});
   final int? param;
 }
diff --git a/packages/go_router_builder/test_inputs/required_extra_value.dart b/packages/go_router_builder/test_inputs/required_extra_value.dart
index 98d6e7a94693..7c244b5b85c9 100644
--- a/packages/go_router_builder/test_inputs/required_extra_value.dart
+++ b/packages/go_router_builder/test_inputs/required_extra_value.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$RequiredExtraValueRoute {}
+
 @TypedGoRoute<RequiredExtraValueRoute>(path: '/default-value-route')
-class RequiredExtraValueRoute extends GoRouteData {
+class RequiredExtraValueRoute extends GoRouteData
+    with _$RequiredExtraValueRoute {
   RequiredExtraValueRoute({required this.$extra});
   final int $extra;
 }
diff --git a/packages/go_router_builder/test_inputs/required_extra_value.dart.expect b/packages/go_router_builder/test_inputs/required_extra_value.dart.expect
index 108cb1244588..662c55b67584 100644
--- a/packages/go_router_builder/test_inputs/required_extra_value.dart.expect
+++ b/packages/go_router_builder/test_inputs/required_extra_value.dart.expect
@@ -1,26 +1,33 @@
 RouteBase get $requiredExtraValueRoute => GoRouteData.$route(
       path: '/default-value-route',
-      factory: $RequiredExtraValueRouteExtension._fromState,
+      factory: _$RequiredExtraValueRoute._fromState,
     );
 
-extension $RequiredExtraValueRouteExtension on RequiredExtraValueRoute {
+mixin _$RequiredExtraValueRoute on GoRouteData {
   static RequiredExtraValueRoute _fromState(GoRouterState state) =>
       RequiredExtraValueRoute(
         $extra: state.extra as int,
       );
 
+  RequiredExtraValueRoute get _self => this as RequiredExtraValueRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/default-value-route',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
diff --git a/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart b/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart
index 2d7f8a17ac04..88b1deeba681 100644
--- a/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart
+++ b/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart
@@ -4,9 +4,12 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$RequiredNullableTypeArgumentsExtraValueRoute {}
+
 @TypedGoRoute<RequiredNullableTypeArgumentsExtraValueRoute>(
     path: '/default-value-route')
-class RequiredNullableTypeArgumentsExtraValueRoute extends GoRouteData {
+class RequiredNullableTypeArgumentsExtraValueRoute extends GoRouteData
+    with _$RequiredNullableTypeArgumentsExtraValueRoute {
   RequiredNullableTypeArgumentsExtraValueRoute({required this.$extra});
   final List<int?> $extra;
 }
diff --git a/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart.expect b/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart.expect
index 9877d353f4df..2a181ac85765 100644
--- a/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart.expect
+++ b/packages/go_router_builder/test_inputs/required_nullable_type_arguments_extra_value.dart.expect
@@ -1,30 +1,36 @@
 RouteBase get $requiredNullableTypeArgumentsExtraValueRoute =>
     GoRouteData.$route(
       path: '/default-value-route',
-      factory:
-          $RequiredNullableTypeArgumentsExtraValueRouteExtension._fromState,
+      factory: _$RequiredNullableTypeArgumentsExtraValueRoute._fromState,
     );
 
-extension $RequiredNullableTypeArgumentsExtraValueRouteExtension
-    on RequiredNullableTypeArgumentsExtraValueRoute {
+mixin _$RequiredNullableTypeArgumentsExtraValueRoute on GoRouteData {
   static RequiredNullableTypeArgumentsExtraValueRoute _fromState(
           GoRouterState state) =>
       RequiredNullableTypeArgumentsExtraValueRoute(
         $extra: state.extra as List<int?>,
       );
 
+  RequiredNullableTypeArgumentsExtraValueRoute get _self =>
+      this as RequiredNullableTypeArgumentsExtraValueRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/default-value-route',
       );
 
-  void go(BuildContext context) => context.go(location, extra: $extra);
+  @override
+  void go(BuildContext context) => context.go(location, extra: _self.$extra);
 
+  @override
   Future<T?> push<T>(BuildContext context) =>
-      context.push<T>(location, extra: $extra);
+      context.push<T>(location, extra: _self.$extra);
 
+  @override
   void pushReplacement(BuildContext context) =>
-      context.pushReplacement(location, extra: $extra);
+      context.pushReplacement(location, extra: _self.$extra);
 
+  @override
   void replace(BuildContext context) =>
-      context.replace(location, extra: $extra);
+      context.replace(location, extra: _self.$extra);
 }
diff --git a/packages/go_router_builder/test_inputs/required_parameters_in_path_cannnot_be_null.dart b/packages/go_router_builder/test_inputs/required_parameters_in_path_cannnot_be_null.dart
index 17cadfb6453f..33fa3b7a1d12 100644
--- a/packages/go_router_builder/test_inputs/required_parameters_in_path_cannnot_be_null.dart
+++ b/packages/go_router_builder/test_inputs/required_parameters_in_path_cannnot_be_null.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NullableRequiredParamInPath {}
+
 @TypedGoRoute<NullableRequiredParamInPath>(path: 'bob/:id')
-class NullableRequiredParamInPath extends GoRouteData {
+class NullableRequiredParamInPath extends GoRouteData
+    with _$NullableRequiredParamInPath {
   NullableRequiredParamInPath({required this.id});
   final int? id;
 }
diff --git a/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart b/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart
index 60c0c58cc1ea..3b5eecc48c08 100644
--- a/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart
+++ b/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NullableRequiredParamNotInPath {}
+
 @TypedGoRoute<NullableRequiredParamNotInPath>(path: 'bob')
-class NullableRequiredParamNotInPath extends GoRouteData {
+class NullableRequiredParamNotInPath extends GoRouteData
+    with _$NullableRequiredParamNotInPath {
   NullableRequiredParamNotInPath({required this.id});
   final int? id;
 }
diff --git a/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart.expect b/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart.expect
index 26ab06e90c2f..60c1c0f6a25c 100644
--- a/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart.expect
+++ b/packages/go_router_builder/test_inputs/required_parameters_not_in_path_can_be_null.dart.expect
@@ -1,29 +1,36 @@
 RouteBase get $nullableRequiredParamNotInPath => GoRouteData.$route(
       path: 'bob',
-      factory: $NullableRequiredParamNotInPathExtension._fromState,
+      factory: _$NullableRequiredParamNotInPath._fromState,
     );
 
-extension $NullableRequiredParamNotInPathExtension
-    on NullableRequiredParamNotInPath {
+mixin _$NullableRequiredParamNotInPath on GoRouteData {
   static NullableRequiredParamNotInPath _fromState(GoRouterState state) =>
       NullableRequiredParamNotInPath(
         id: _$convertMapValue('id', state.uri.queryParameters, int.tryParse),
       );
 
+  NullableRequiredParamNotInPath get _self =>
+      this as NullableRequiredParamNotInPath;
+
+  @override
   String get location => GoRouteData.$location(
         'bob',
         queryParams: {
-          if (id != null) 'id': id!.toString(),
+          if (_self.id != null) 'id': _self.id!.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/required_query_parameter.dart b/packages/go_router_builder/test_inputs/required_query_parameter.dart
index d5b5a814136d..1dd4f0c27810 100644
--- a/packages/go_router_builder/test_inputs/required_query_parameter.dart
+++ b/packages/go_router_builder/test_inputs/required_query_parameter.dart
@@ -4,8 +4,11 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$NonNullableRequiredParamNotInPath {}
+
 @TypedGoRoute<NonNullableRequiredParamNotInPath>(path: 'bob')
-class NonNullableRequiredParamNotInPath extends GoRouteData {
+class NonNullableRequiredParamNotInPath extends GoRouteData
+    with _$NonNullableRequiredParamNotInPath {
   NonNullableRequiredParamNotInPath({required this.id});
   final int id;
 }
diff --git a/packages/go_router_builder/test_inputs/required_query_parameter.dart.expect b/packages/go_router_builder/test_inputs/required_query_parameter.dart.expect
index aac229ed1180..23487d96d6e3 100644
--- a/packages/go_router_builder/test_inputs/required_query_parameter.dart.expect
+++ b/packages/go_router_builder/test_inputs/required_query_parameter.dart.expect
@@ -1,28 +1,35 @@
 RouteBase get $nonNullableRequiredParamNotInPath => GoRouteData.$route(
       path: 'bob',
-      factory: $NonNullableRequiredParamNotInPathExtension._fromState,
+      factory: _$NonNullableRequiredParamNotInPath._fromState,
     );
 
-extension $NonNullableRequiredParamNotInPathExtension
-    on NonNullableRequiredParamNotInPath {
+mixin _$NonNullableRequiredParamNotInPath on GoRouteData {
   static NonNullableRequiredParamNotInPath _fromState(GoRouterState state) =>
       NonNullableRequiredParamNotInPath(
         id: int.parse(state.uri.queryParameters['id']!)!,
       );
 
+  NonNullableRequiredParamNotInPath get _self =>
+      this as NonNullableRequiredParamNotInPath;
+
+  @override
   String get location => GoRouteData.$location(
         'bob',
         queryParams: {
-          'id': id.toString(),
+          'id': _self.id.toString(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
diff --git a/packages/go_router_builder/test_inputs/set.dart b/packages/go_router_builder/test_inputs/set.dart
index 286fd6b236f4..6fb05b47eeab 100644
--- a/packages/go_router_builder/test_inputs/set.dart
+++ b/packages/go_router_builder/test_inputs/set.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$SetRoute {}
+
 @TypedGoRoute<SetRoute>(path: '/set-route')
-class SetRoute extends GoRouteData {
+class SetRoute extends GoRouteData with _$SetRoute {
   SetRoute({
     required this.ids,
     this.nullableIds,
diff --git a/packages/go_router_builder/test_inputs/set.dart.expect b/packages/go_router_builder/test_inputs/set.dart.expect
index a8f577bdb001..69d25393d593 100644
--- a/packages/go_router_builder/test_inputs/set.dart.expect
+++ b/packages/go_router_builder/test_inputs/set.dart.expect
@@ -1,9 +1,9 @@
 RouteBase get $setRoute => GoRouteData.$route(
       path: '/set-route',
-      factory: $SetRouteExtension._fromState,
+      factory: _$SetRoute._fromState,
     );
 
-extension $SetRouteExtension on SetRoute {
+mixin _$SetRoute on GoRouteData {
   static SetRoute _fromState(GoRouterState state) => SetRoute(
         ids: (state.uri.queryParametersAll['ids']
                     ?.map(int.parse)
@@ -25,25 +25,33 @@ extension $SetRouteExtension on SetRoute {
             const <int>{0},
       );
 
+  SetRoute get _self => this as SetRoute;
+
+  @override
   String get location => GoRouteData.$location(
         '/set-route',
         queryParams: {
-          'ids': ids.map((e) => e.toString()).toList(),
-          if (nullableIds != null)
-            'nullable-ids': nullableIds?.map((e) => e.toString()).toList(),
-          if (!_$iterablesEqual(idsWithDefaultValue, const <int>{0}))
+          'ids': _self.ids.map((e) => e.toString()).toList(),
+          if (_self.nullableIds != null)
+            'nullable-ids':
+                _self.nullableIds?.map((e) => e.toString()).toList(),
+          if (!_$iterablesEqual(_self.idsWithDefaultValue, const <int>{0}))
             'ids-with-default-value':
-                idsWithDefaultValue.map((e) => e.toString()).toList(),
+                _self.idsWithDefaultValue.map((e) => e.toString()).toList(),
         },
       );
 
+  @override
   void go(BuildContext context) => context.go(location);
 
+  @override
   Future<T?> push<T>(BuildContext context) => context.push<T>(location);
 
+  @override
   void pushReplacement(BuildContext context) =>
       context.pushReplacement(location);
 
+  @override
   void replace(BuildContext context) => context.replace(location);
 }
 
diff --git a/packages/go_router_builder/test_inputs/unsupported_type.dart b/packages/go_router_builder/test_inputs/unsupported_type.dart
index 55df2a674d1d..7681c3212338 100644
--- a/packages/go_router_builder/test_inputs/unsupported_type.dart
+++ b/packages/go_router_builder/test_inputs/unsupported_type.dart
@@ -4,8 +4,10 @@
 
 import 'package:go_router/go_router.dart';
 
+mixin _$UnsupportedType {}
+
 @TypedGoRoute<UnsupportedType>(path: 'bob/:id')
-class UnsupportedType extends GoRouteData {
+class UnsupportedType extends GoRouteData with _$UnsupportedType {
   UnsupportedType({required this.id});
   final Stopwatch id;
 }