diff --git a/experimental/linting_tool/.gitignore b/experimental/linting_tool/.gitignore
index 0fa6b675c..a1345d017 100644
--- a/experimental/linting_tool/.gitignore
+++ b/experimental/linting_tool/.gitignore
@@ -32,7 +32,6 @@
 /build/
 
 # Web related
-lib/generated_plugin_registrant.dart
 
 # Symbolication related
 app.*.symbols
diff --git a/experimental/linting_tool/lib/layout/adaptive.dart b/experimental/linting_tool/lib/layout/adaptive.dart
index c0d14dbff..5daa08986 100644
--- a/experimental/linting_tool/lib/layout/adaptive.dart
+++ b/experimental/linting_tool/lib/layout/adaptive.dart
@@ -12,12 +12,10 @@ bool isDisplayLarge(BuildContext context) =>
 
 /// Returns boolean value whether the window is considered medium size.
 /// Used to build adaptive and responsive layouts.
-bool isDisplayMedium(BuildContext context) {
-  return getWindowType(context) == AdaptiveWindowType.medium;
-}
+bool isDisplayMedium(BuildContext context) =>
+    getWindowType(context) == AdaptiveWindowType.medium;
 
 /// Returns boolean value whether the window is considered small size.
 /// Used to build adaptive and responsive layouts.
-bool isDisplaySmall(BuildContext context) {
-  return getWindowType(context) <= AdaptiveWindowType.small;
-}
+bool isDisplaySmall(BuildContext context) =>
+    getWindowType(context) <= AdaptiveWindowType.small;
diff --git a/experimental/linting_tool/lib/main.dart b/experimental/linting_tool/lib/main.dart
index 65bfbbe82..ec45d8660 100644
--- a/experimental/linting_tool/lib/main.dart
+++ b/experimental/linting_tool/lib/main.dart
@@ -10,7 +10,7 @@ import 'package:linting_tool/model/rule.dart';
 import 'package:window_size/window_size.dart';
 
 Future<void> main() async {
-  /// Initiliaze Hive DB.
+  /// Initialize Hive DB.
   await Hive.initFlutter();
 
   /// Register adapters for [Rule] and [RulesProfile]
diff --git a/experimental/linting_tool/lib/model/editing_controller.dart b/experimental/linting_tool/lib/model/editing_controller.dart
index f9ce4a5dd..4575c705e 100644
--- a/experimental/linting_tool/lib/model/editing_controller.dart
+++ b/experimental/linting_tool/lib/model/editing_controller.dart
@@ -11,7 +11,7 @@ import 'package:linting_tool/model/rule.dart';
 class EditingController extends ChangeNotifier {
   bool _isEditing;
 
-  EditingController({bool? isEditing}) : _isEditing = isEditing ?? false;
+  EditingController({bool isEditing = false}) : _isEditing = isEditing;
 
   bool get isEditing => _isEditing;
 
@@ -21,9 +21,9 @@ class EditingController extends ChangeNotifier {
     notifyListeners();
   }
 
-  final List<Rule> _selectedRules = [];
+  final Set<Rule> _selectedRules = {};
 
-  List<Rule> get selectedRules => _selectedRules;
+  Set<Rule> get selectedRules => _selectedRules;
 
   void selectRule(Rule rule) {
     _selectedRules.add(rule);
@@ -37,12 +37,10 @@ class EditingController extends ChangeNotifier {
 
   Future deleteSelected(
       RulesProfile profile, ProfilesStore profilesStore) async {
-    var rules = profile.rules;
-    for (var rule in _selectedRules) {
-      rules.remove(rule);
-    }
+    final rules = profile.rules;
+    rules.removeWhere((rule) => _selectedRules.contains(rule));
 
-    RulesProfile newProfile = RulesProfile(name: profile.name, rules: rules);
+    final newProfile = RulesProfile(name: profile.name, rules: rules);
 
     await profilesStore.updateProfile(profile, newProfile);
 
diff --git a/experimental/linting_tool/lib/model/profiles_store.dart b/experimental/linting_tool/lib/model/profiles_store.dart
index 854f0f8e9..67aa04adb 100644
--- a/experimental/linting_tool/lib/model/profiles_store.dart
+++ b/experimental/linting_tool/lib/model/profiles_store.dart
@@ -20,11 +20,12 @@ import 'package:yaml/yaml.dart';
 const _boxName = 'rules_profile';
 
 class ProfilesStore extends ChangeNotifier {
-  late final Repository repository;
-  ProfilesStore(http.Client httpClient) {
-    repository = Repository(httpClient);
+  final Repository repository;
+
+  ProfilesStore(http.Client httpClient) : repository = Repository(httpClient) {
     fetchSavedProfiles();
   }
+
   bool _isLoading = true;
 
   bool get isLoading => _isLoading;
@@ -41,8 +42,7 @@ class ProfilesStore extends ChangeNotifier {
     if (!_isLoading) _isLoading = true;
     notifyListeners();
     try {
-      var profiles = await HiveService.getBoxes<RulesProfile>(_boxName);
-      _savedProfiles = profiles;
+      _savedProfiles = await HiveService.getBoxes<RulesProfile>(_boxName);
     } on Exception catch (e) {
       log(e.toString());
     }
@@ -64,12 +64,16 @@ class ProfilesStore extends ChangeNotifier {
     // TODO(abd99): Consider refactoring to LinkedHashSet/SplayTreeSet to avoid
     // duplication automatically.
     // ref: https://github.com/flutter/samples/pull/870#discussion_r685666792
-    var rules = profile.rules;
-    if (!rules.contains(rule)) {
-      rules.add(rule);
+    final rules = profile.rules;
+
+    // If rule is already in profile, skip updating profile
+    if (rules.contains(rule)) {
+      return;
     }
 
-    RulesProfile newProfile = RulesProfile(name: profile.name, rules: rules);
+    rules.add(rule);
+
+    final newProfile = RulesProfile(name: profile.name, rules: rules);
 
     await HiveService.updateBox<RulesProfile>(profile, newProfile, _boxName);
 
@@ -88,7 +92,7 @@ class ProfilesStore extends ChangeNotifier {
   }
 
   Future<void> removeRuleFromProfile(RulesProfile profile, Rule rule) async {
-    var newProfile =
+    final newProfile =
         RulesProfile(name: profile.name, rules: profile.rules..remove(rule));
     await updateProfile(profile, newProfile);
   }
@@ -111,10 +115,10 @@ class ProfilesStore extends ChangeNotifier {
     var resultSaved = false;
 
     try {
-      var templateFileData = await repository.getTemplateFile();
+      final templateFileData = await repository.getTemplateFile();
 
       /// Fetch formatted data to create new YamlFile.
-      String newYamlFile =
+      final newYamlFile =
           _prepareYamlFile(profile, templateFileData, rulesStyle);
 
       resultSaved = await _saveFileToDisk(newYamlFile);
@@ -136,7 +140,7 @@ class ProfilesStore extends ChangeNotifier {
     const name = 'analysis_options.yaml';
 
     /// Get file path using file picker.
-    var savePath = await file_selector.getSavePath(
+    final savePath = await file_selector.getSavePath(
       suggestedName: name,
     );
 
@@ -149,25 +153,21 @@ class ProfilesStore extends ChangeNotifier {
       return true;
     }
 
-    var errorMessage = 'File path not found.';
+    const errorMessage = 'File path not found.';
     _error = errorMessage;
     throw Exception(errorMessage);
   }
 
   String _prepareYamlFile(
       RulesProfile profile, YamlMap templateFile, RulesStyle rulesStyle) {
-    var rules = profile.rules.map((e) => e.name).toList();
+    final rules = profile.rules.map((e) => e.name);
 
-    var rulesData =
+    final rulesData =
         json.decode(json.encode(templateFile)) as Map<String, dynamic>;
 
     /// Add rules to existing template according to formatting style.
     if (rulesStyle == RulesStyle.booleanMap) {
-      var rulesMap = Map.fromEntries(
-        rules.map(
-          (e) => MapEntry(e, true),
-        ),
-      );
+      final rulesMap = <String, bool>{for (final rule in rules) rule: true};
       rulesData.update('linter', (dynamic value) => {'rules': rulesMap});
     } else {
       rulesData.update('linter', (dynamic value) => {'rules': rules});
diff --git a/experimental/linting_tool/lib/model/rule.dart b/experimental/linting_tool/lib/model/rule.dart
index 5d9c5a103..ae88ed499 100644
--- a/experimental/linting_tool/lib/model/rule.dart
+++ b/experimental/linting_tool/lib/model/rule.dart
@@ -41,5 +41,5 @@ class Rule extends Equatable {
   Map<String, dynamic> toJson() => _$RuleToJson(this);
 
   @override
-  List<Object?> get props => [name];
+  List<Object> get props => [name];
 }
diff --git a/experimental/linting_tool/lib/model/rule.g.dart b/experimental/linting_tool/lib/model/rule.g.dart
index fdcd5f5ea..22d577e0f 100644
--- a/experimental/linting_tool/lib/model/rule.g.dart
+++ b/experimental/linting_tool/lib/model/rule.g.dart
@@ -62,19 +62,17 @@ class RuleAdapter extends TypeAdapter<Rule> {
 // JsonSerializableGenerator
 // **************************************************************************
 
-Rule _$RuleFromJson(Map<String, dynamic> json) {
-  return Rule(
-    name: json['name'] as String,
-    description: json['description'] as String,
-    group: json['group'] as String,
-    maturity: json['maturity'] as String,
-    incompatible: (json['incompatible'] as List<dynamic>)
-        .map((e) => e as String)
-        .toList(),
-    sets: (json['sets'] as List<dynamic>).map((e) => e as String).toList(),
-    details: json['details'] as String,
-  );
-}
+Rule _$RuleFromJson(Map<String, dynamic> json) => Rule(
+      name: json['name'] as String,
+      description: json['description'] as String,
+      group: json['group'] as String,
+      maturity: json['maturity'] as String,
+      incompatible: (json['incompatible'] as List<dynamic>)
+          .map((e) => e as String)
+          .toList(),
+      sets: (json['sets'] as List<dynamic>).map((e) => e as String).toList(),
+      details: json['details'] as String,
+    );
 
 Map<String, dynamic> _$RuleToJson(Rule instance) => <String, dynamic>{
       'name': instance.name,
diff --git a/experimental/linting_tool/lib/model/rules_store.dart b/experimental/linting_tool/lib/model/rules_store.dart
index 25597bec2..66ef06f49 100644
--- a/experimental/linting_tool/lib/model/rules_store.dart
+++ b/experimental/linting_tool/lib/model/rules_store.dart
@@ -13,12 +13,12 @@ import 'package:linting_tool/repository/repository.dart';
 
 /// Manages fetching rules from the web.
 class RuleStore extends ChangeNotifier {
-  late final Repository repository;
+  final Repository repository;
 
-  RuleStore(http.Client httpClient) {
-    repository = Repository(httpClient);
+  RuleStore(http.Client httpClient) : repository = Repository(httpClient) {
     fetchRules();
   }
+
   bool _isLoading = true;
 
   bool get isLoading => _isLoading;
@@ -32,32 +32,31 @@ class RuleStore extends ChangeNotifier {
   String? get error => _error;
 
   List<RulesProfile> get defaultProfiles {
-    List<RulesProfile> defaultProfiles = [];
+    if (isLoading || rules.isEmpty) {
+      return const [];
+    }
 
-    var rulesWithDefaultSets =
-        rules.where((rule) => rule.sets.isNotEmpty).toList();
+    final Map<String, RulesProfile> setsToProfiles = {};
 
-    for (final rule in rulesWithDefaultSets) {
+    for (final rule in rules) {
       for (final setName in rule.sets) {
-        var profileIndex =
-            defaultProfiles.indexWhere((profile) => profile.name == setName);
-        if (profileIndex >= 0) {
-          defaultProfiles[profileIndex].rules.add(rule);
+        final profile = setsToProfiles[setName];
+        if (profile == null) {
+          setsToProfiles[setName] = RulesProfile(name: setName, rules: [rule]);
         } else {
-          defaultProfiles.add(RulesProfile(name: setName, rules: [rule]));
+          profile.rules.add(rule);
         }
       }
     }
 
-    return defaultProfiles;
+    return setsToProfiles.values.toList(growable: false);
   }
 
   Future<void> fetchRules() async {
     if (!_isLoading) _isLoading = true;
     notifyListeners();
     try {
-      var rules = await repository.getRulesList();
-      _rules = rules;
+      _rules = await repository.getRulesList();
     } on SocketException catch (e) {
       log(e.toString());
       _error = 'Check internet connection.';
diff --git a/experimental/linting_tool/lib/pages/default_lints_page.dart b/experimental/linting_tool/lib/pages/default_lints_page.dart
index 81cec23e3..3c356c9cb 100644
--- a/experimental/linting_tool/lib/pages/default_lints_page.dart
+++ b/experimental/linting_tool/lib/pages/default_lints_page.dart
@@ -20,8 +20,8 @@ class DefaultLintsPage extends StatelessWidget {
           return const CircularProgressIndicator.adaptive();
         }
 
-        if (rulesStore.defaultProfiles.isNotEmpty) {
-          var defaultSets = rulesStore.defaultProfiles;
+        final defaultSets = rulesStore.defaultProfiles;
+        if (defaultSets.isNotEmpty) {
           final isDesktop = isDisplayLarge(context);
           final isTablet = isDisplayMedium(context);
           final startPadding = isTablet
@@ -45,7 +45,7 @@ class DefaultLintsPage extends StatelessWidget {
             cacheExtent: 5,
             itemCount: defaultSets.length,
             itemBuilder: (context, index) {
-              var profile = rulesStore.defaultProfiles[index];
+              final profile = defaultSets[index];
               return ListTile(
                 title: Text(
                   profile.name,
diff --git a/experimental/linting_tool/lib/pages/default_rules_page.dart b/experimental/linting_tool/lib/pages/default_rules_page.dart
index d23fc3718..2161704cc 100644
--- a/experimental/linting_tool/lib/pages/default_rules_page.dart
+++ b/experimental/linting_tool/lib/pages/default_rules_page.dart
@@ -20,7 +20,7 @@ class DefaultRulesPage extends StatelessWidget {
   Widget build(BuildContext context) {
     final isDesktop = isDisplayLarge(context);
     final isTablet = isDisplayMedium(context);
-    var textTheme = Theme.of(context).textTheme;
+    final textTheme = Theme.of(context).textTheme;
     final startPadding = isTablet
         ? 60.0
         : isDesktop
diff --git a/experimental/linting_tool/lib/pages/home_page.dart b/experimental/linting_tool/lib/pages/home_page.dart
index eef20ca9c..2dc63a96f 100644
--- a/experimental/linting_tool/lib/pages/home_page.dart
+++ b/experimental/linting_tool/lib/pages/home_page.dart
@@ -19,38 +19,36 @@ class HomePage extends StatelessWidget {
           return const CircularProgressIndicator.adaptive();
         }
 
-        if (!rulesStore.isLoading) {
-          if (rulesStore.rules.isNotEmpty) {
-            final isDesktop = isDisplayLarge(context);
-            final isTablet = isDisplayMedium(context);
-            final startPadding = isTablet
-                ? 60.0
-                : isDesktop
-                    ? 120.0
-                    : 16.0;
-            final endPadding = isTablet
-                ? 60.0
-                : isDesktop
-                    ? 120.0
-                    : 16.0;
+        if (rulesStore.rules.isNotEmpty) {
+          final isDesktop = isDisplayLarge(context);
+          final isTablet = isDisplayMedium(context);
+          final startPadding = isTablet
+              ? 60.0
+              : isDesktop
+                  ? 120.0
+                  : 16.0;
+          final endPadding = isTablet
+              ? 60.0
+              : isDesktop
+                  ? 120.0
+                  : 16.0;
 
-            return ListView.separated(
-              padding: EdgeInsetsDirectional.only(
-                start: startPadding,
-                end: endPadding,
-                top: isDesktop ? 28 : 16,
-                bottom: isDesktop ? kToolbarHeight : 16,
-              ),
-              itemCount: rulesStore.rules.length,
-              cacheExtent: 5,
-              itemBuilder: (context, index) {
-                return LintExpansionTile(
-                  rule: rulesStore.rules[index],
-                );
-              },
-              separatorBuilder: (context, index) => const SizedBox(height: 4),
-            );
-          }
+          return ListView.separated(
+            padding: EdgeInsetsDirectional.only(
+              start: startPadding,
+              end: endPadding,
+              top: isDesktop ? 28 : 16,
+              bottom: isDesktop ? kToolbarHeight : 16,
+            ),
+            itemCount: rulesStore.rules.length,
+            cacheExtent: 5,
+            itemBuilder: (context, index) {
+              return LintExpansionTile(
+                rule: rulesStore.rules[index],
+              );
+            },
+            separatorBuilder: (context, index) => const SizedBox(height: 4),
+          );
         }
 
         return Column(
diff --git a/experimental/linting_tool/lib/pages/rules_page.dart b/experimental/linting_tool/lib/pages/rules_page.dart
index 0e9816da1..a5e27899b 100644
--- a/experimental/linting_tool/lib/pages/rules_page.dart
+++ b/experimental/linting_tool/lib/pages/rules_page.dart
@@ -23,7 +23,7 @@ class RulesPage extends StatelessWidget {
   Widget build(BuildContext context) {
     final isDesktop = isDisplayLarge(context);
     final isTablet = isDisplayMedium(context);
-    var textTheme = Theme.of(context).textTheme;
+    final textTheme = Theme.of(context).textTheme;
     final startPadding = isTablet
         ? 60.0
         : isDesktop
@@ -85,7 +85,7 @@ class RulesPage extends StatelessWidget {
                           itemCount: profile.rules.length,
                           cacheExtent: 5,
                           itemBuilder: (context, index) {
-                            /// Show righ-click context menu to delete rule.
+                            /// Show right-click context menu to delete rule.
                             return ContextMenuRegion(
                               contextMenu: GenericContextMenu(
                                 buttonConfigs: [
diff --git a/experimental/linting_tool/lib/repository/api_provider.dart b/experimental/linting_tool/lib/repository/api_provider.dart
index dc48391f8..76045a830 100644
--- a/experimental/linting_tool/lib/repository/api_provider.dart
+++ b/experimental/linting_tool/lib/repository/api_provider.dart
@@ -8,8 +8,10 @@ import 'package:linting_tool/model/rule.dart';
 import 'package:yaml/yaml.dart';
 
 class APIProvider {
-  final _baseURL = 'https://dart-lang.github.io/linter';
+  static const String _baseURL = 'https://dart-lang.github.io/linter';
+
   final http.Client httpClient;
+
   APIProvider(this.httpClient);
 
   Future<List<Rule>> getRulesList() async {
@@ -17,11 +19,10 @@ class APIProvider {
         await httpClient.get(Uri.parse('$_baseURL//lints/machine/rules.json'));
 
     if (response.statusCode == 200) {
-      List<Rule> rulesList = [];
       final data = json.decode(response.body) as List;
-      for (var item in data) {
-        rulesList.add(Rule.fromJson(item as Map<String, dynamic>));
-      }
+      final rulesList = [
+        for (final item in data) Rule.fromJson(item as Map<String, dynamic>)
+      ];
       return rulesList;
     } else {
       throw Exception('Failed to load rules');
diff --git a/experimental/linting_tool/lib/repository/hive_service.dart b/experimental/linting_tool/lib/repository/hive_service.dart
index f46dcf791..3fdc75d0e 100644
--- a/experimental/linting_tool/lib/repository/hive_service.dart
+++ b/experimental/linting_tool/lib/repository/hive_service.dart
@@ -10,7 +10,7 @@ class HiveService {
       boxName,
     );
 
-    List<T> existingProducts = await getBoxes(boxName);
+    final List<T> existingProducts = await getBoxes(boxName);
 
     if (!existingProducts.contains(item)) {
       await openBox.add(item);
@@ -24,9 +24,9 @@ class HiveService {
       boxName,
     );
 
-    List<T> existingProducts = await getBoxes(boxName);
+    final Set<T> existingProducts = Set.unmodifiable(await getBoxes(boxName));
 
-    for (var item in items) {
+    for (final item in items) {
       if (!existingProducts.contains(item)) {
         await openBox.add(item);
       }
@@ -38,9 +38,9 @@ class HiveService {
       boxName,
     );
 
-    List<T> boxes = await getBoxes(boxName);
+    final List<T> boxes = await getBoxes(boxName);
 
-    for (var box in boxes) {
+    for (final box in boxes) {
       if (box == item) {
         await openBox.deleteAt(boxes.indexOf(item));
       }
@@ -52,9 +52,9 @@ class HiveService {
       boxName,
     );
 
-    List<T> boxes = await getBoxes(boxName);
+    final List<T> boxes = await getBoxes(boxName);
 
-    for (var box in boxes) {
+    for (final box in boxes) {
       if (box == item) {
         await openBox.putAt(boxes.indexOf(item), newItem);
       }
@@ -62,15 +62,13 @@ class HiveService {
   }
 
   static Future<List<T>> getBoxes<T>(String boxName, [String? query]) async {
-    List<T> boxList = [];
-
     final openBox = await Hive.openLazyBox<T>(boxName);
 
-    int length = openBox.length;
+    final length = openBox.length;
 
-    for (int i = 0; i < length; i++) {
-      boxList.add(await openBox.getAt(i) as T);
-    }
+    final boxList = <T>[
+      for (int i = 0; i < length; i++) await openBox.getAt(i) as T
+    ];
 
     return boxList;
   }
diff --git a/experimental/linting_tool/lib/repository/repository.dart b/experimental/linting_tool/lib/repository/repository.dart
index cf7812bc2..eadd8f409 100644
--- a/experimental/linting_tool/lib/repository/repository.dart
+++ b/experimental/linting_tool/lib/repository/repository.dart
@@ -8,11 +8,9 @@ import 'package:linting_tool/repository/api_provider.dart';
 import 'package:yaml/yaml.dart';
 
 class Repository {
-  late final APIProvider _apiProvider;
+  final APIProvider _apiProvider;
 
-  Repository(http.Client httpClient) {
-    _apiProvider = APIProvider(httpClient);
-  }
+  Repository(http.Client httpClient) : _apiProvider = APIProvider(httpClient);
 
   Future<List<Rule>> getRulesList() => _apiProvider.getRulesList();
 
diff --git a/experimental/linting_tool/lib/theme/app_theme.dart b/experimental/linting_tool/lib/theme/app_theme.dart
index 0253e2e30..1c0bf4b91 100644
--- a/experimental/linting_tool/lib/theme/app_theme.dart
+++ b/experimental/linting_tool/lib/theme/app_theme.dart
@@ -7,7 +7,7 @@ import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:linting_tool/theme/colors.dart';
 
-class AppTheme {
+abstract class AppTheme {
   static ThemeData buildReplyLightTheme(BuildContext context) {
     final base = ThemeData.light();
     return base.copyWith(
diff --git a/experimental/linting_tool/lib/theme/colors.dart b/experimental/linting_tool/lib/theme/colors.dart
index 9ffebb8e5..2166ea19b 100644
--- a/experimental/linting_tool/lib/theme/colors.dart
+++ b/experimental/linting_tool/lib/theme/colors.dart
@@ -4,7 +4,7 @@
 
 import 'package:flutter/material.dart';
 
-class AppColors {
+abstract class AppColors {
   static const Color white50 = Color(0xFFFFFFFF);
 
   static const Color black800 = Color(0xFF121212);
diff --git a/experimental/linting_tool/lib/widgets/adaptive_nav.dart b/experimental/linting_tool/lib/widgets/adaptive_nav.dart
index d6327fc9d..1a801265c 100644
--- a/experimental/linting_tool/lib/widgets/adaptive_nav.dart
+++ b/experimental/linting_tool/lib/widgets/adaptive_nav.dart
@@ -46,7 +46,7 @@ class _AdaptiveNavState extends State<AdaptiveNav> {
       ),
     ];
 
-    final trailing = <String, IconData>{
+    const trailing = <String, IconData>{
       'About': Icons.info_outline,
     };
 
@@ -62,25 +62,25 @@ class _NavView extends StatefulWidget {
   const _NavView({
     required this.extended,
     required this.destinations,
-    this.trailing,
+    this.trailing = const {},
   });
 
   final bool extended;
   final List<_Destination> destinations;
-  final Map<String, IconData>? trailing;
+  final Map<String, IconData> trailing;
 
   @override
   _NavViewState createState() => _NavViewState();
 }
 
 class _NavViewState extends State<_NavView> {
-  late ValueNotifier<bool?> _isExtended;
+  late final ValueNotifier<bool> _isExtended;
   var _selectedIndex = 0;
 
   @override
   void initState() {
     super.initState();
-    _isExtended = ValueNotifier<bool?>(widget.extended);
+    _isExtended = ValueNotifier<bool>(widget.extended);
   }
 
   void _onDestinationSelected(int index) {
@@ -91,7 +91,7 @@ class _NavViewState extends State<_NavView> {
 
   @override
   Widget build(BuildContext context) {
-    var textTheme = Theme.of(context).textTheme;
+    final textTheme = Theme.of(context).textTheme;
     return Scaffold(
       appBar: AppBar(
         title: Text(
@@ -115,7 +115,7 @@ class _NavViewState extends State<_NavView> {
                     minHeight: constraints.maxHeight,
                   ),
                   child: IntrinsicHeight(
-                    child: ValueListenableBuilder<bool?>(
+                    child: ValueListenableBuilder<bool>(
                       valueListenable: _isExtended,
                       builder: (context, value, child) {
                         var isSmallDisplay = isDisplaySmall(context);
@@ -130,13 +130,13 @@ class _NavViewState extends State<_NavView> {
                                 label: Text(destination.textLabel),
                               ),
                           ],
-                          extended: _isExtended.value! && !isSmallDisplay,
+                          extended: _isExtended.value && !isSmallDisplay,
                           labelType: NavigationRailLabelType.none,
                           leading: _NavigationRailHeader(
                             extended: _isExtended,
                           ),
                           trailing: _NavigationRailTrailingSection(
-                            trailingDestinations: widget.trailing!,
+                            trailingDestinations: widget.trailing,
                           ),
                           selectedIndex: _selectedIndex,
                           onDestinationSelected: _onDestinationSelected,
diff --git a/experimental/linting_tool/lib/widgets/lint_expansion_tile.dart b/experimental/linting_tool/lib/widgets/lint_expansion_tile.dart
index 7adee35a6..c02c78a1b 100644
--- a/experimental/linting_tool/lib/widgets/lint_expansion_tile.dart
+++ b/experimental/linting_tool/lib/widgets/lint_expansion_tile.dart
@@ -13,6 +13,7 @@ import 'package:provider/provider.dart';
 
 class LintExpansionTile extends StatefulWidget {
   final Rule rule;
+
   const LintExpansionTile({
     required this.rule,
     super.key,
@@ -24,10 +25,11 @@ class LintExpansionTile extends StatefulWidget {
 
 class _LintExpansionTileState extends State<LintExpansionTile> {
   var isExpanded = false;
+
   @override
   Widget build(BuildContext context) {
-    var theme = Theme.of(context);
-    var textTheme = theme.textTheme;
+    final theme = Theme.of(context);
+    final textTheme = theme.textTheme;
     final rule = widget.rule;
     final incompatibleString =
         rule.incompatible.isNotEmpty ? rule.incompatible.join(', ') : 'none';
@@ -287,8 +289,8 @@ class ExistingProfileDialog extends StatefulWidget {
 class _ExistingProfileDialogState extends State<ExistingProfileDialog> {
   @override
   Widget build(BuildContext context) {
-    var profilesStore = Provider.of<ProfilesStore>(context);
-    var savedProfiles = profilesStore.savedProfiles;
+    final profilesStore = Provider.of<ProfilesStore>(context);
+    final savedProfiles = profilesStore.savedProfiles;
     return AlertDialog(
       title: const Text('Select a lint profile'),
       content: Column(
diff --git a/experimental/linting_tool/lib/widgets/saved_rule_tile.dart b/experimental/linting_tool/lib/widgets/saved_rule_tile.dart
index 999ce523b..d5f695f92 100644
--- a/experimental/linting_tool/lib/widgets/saved_rule_tile.dart
+++ b/experimental/linting_tool/lib/widgets/saved_rule_tile.dart
@@ -12,6 +12,7 @@ import 'package:provider/provider.dart';
 
 class SavedRuleTile extends StatefulWidget {
   final Rule rule;
+
   const SavedRuleTile({
     required this.rule,
     super.key,
@@ -27,8 +28,8 @@ class _SavedRuleTileState extends State<SavedRuleTile> {
 
   @override
   Widget build(BuildContext context) {
-    var theme = Theme.of(context);
-    var textTheme = theme.textTheme;
+    final theme = Theme.of(context);
+    final textTheme = theme.textTheme;
     final rule = widget.rule;
     final incompatibleString =
         rule.incompatible.isNotEmpty ? rule.incompatible.join(', ') : 'none';
diff --git a/experimental/linting_tool/macos/Podfile.lock b/experimental/linting_tool/macos/Podfile.lock
index 2ab9ee132..b22eba92f 100644
--- a/experimental/linting_tool/macos/Podfile.lock
+++ b/experimental/linting_tool/macos/Podfile.lock
@@ -31,7 +31,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   file_selector_macos: f1b08a781e66103e3ba279fd5d4024a2478b3af6
   FlutterMacOS: 57701585bf7de1b3fc2bb61f6378d73bbdea8424
-  path_provider_macos: 160cab0d5461f0c0e02995469a98f24bdb9a3f1f
+  path_provider_macos: 3c0c3b4b0d4a76d2bf989a913c2de869c5641a19
   url_launcher_macos: 597e05b8e514239626bcf4a850fcf9ef5c856ec3
   window_size: 339dafa0b27a95a62a843042038fa6c3c48de195
 
diff --git a/experimental/linting_tool/pubspec.lock b/experimental/linting_tool/pubspec.lock
index 6df244240..c163a7636 100644
--- a/experimental/linting_tool/pubspec.lock
+++ b/experimental/linting_tool/pubspec.lock
@@ -7,35 +7,35 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "38.0.0"
+    version: "40.0.0"
   adaptive_breakpoints:
     dependency: "direct main"
     description:
       name: adaptive_breakpoints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.1"
+    version: "0.1.2"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.4.1"
+    version: "4.1.0"
   args:
     dependency: transitive
     description:
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.0"
+    version: "2.3.1"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -77,7 +77,7 @@ packages:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.10"
+    version: "2.1.11"
   build_runner_core:
     dependency: transitive
     description:
@@ -105,7 +105,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   charcode:
     dependency: transitive
     description:
@@ -203,7 +203,7 @@ packages:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.2.1"
   file:
     dependency: transitive
     description:
@@ -217,7 +217,7 @@ packages:
       name: file_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.4+1"
+    version: "0.8.4+2"
   file_selector_linux:
     dependency: "direct main"
     description:
@@ -231,7 +231,7 @@ packages:
       name: file_selector_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.2"
+    version: "0.8.2+1"
   file_selector_platform_interface:
     dependency: transitive
     description:
@@ -245,21 +245,21 @@ packages:
       name: file_selector_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.1+3"
+    version: "0.8.1+5"
   file_selector_windows:
     dependency: "direct main"
     description:
       name: file_selector_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.2"
+    version: "0.8.2+1"
   fixnum:
     dependency: transitive
     description:
       name: fixnum
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -295,7 +295,7 @@ packages:
       name: frontend_server_client
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   glob:
     dependency: transitive
     description:
@@ -309,7 +309,7 @@ packages:
       name: google_fonts
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.2"
+    version: "3.0.0"
   graphs:
     dependency: transitive
     description:
@@ -323,7 +323,7 @@ packages:
       name: hive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.2.1"
   hive_flutter:
     dependency: "direct main"
     description:
@@ -337,7 +337,7 @@ packages:
       name: hive_generator
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.1.3"
   http:
     dependency: "direct main"
     description:
@@ -358,7 +358,7 @@ packages:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.0.1"
   io:
     dependency: transitive
     description:
@@ -449,7 +449,7 @@ packages:
       name: mockito
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.1.0"
+    version: "5.2.0"
   nested:
     dependency: transitive
     description:
@@ -477,49 +477,49 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.9"
+    version: "2.0.10"
   path_provider_android:
     dependency: transitive
     description:
       name: path_provider_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
+    version: "2.0.14"
   path_provider_ios:
     dependency: transitive
     description:
       name: path_provider_ios
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.0.9"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "2.1.6"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.0.6"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.0.6"
   platform:
     dependency: transitive
     description:
@@ -608,7 +608,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.2"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -636,7 +636,7 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
@@ -664,42 +664,42 @@ packages:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.3.1"
   url_launcher:
     dependency: transitive
     description:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.0"
+    version: "6.1.2"
   url_launcher_android:
     dependency: transitive
     description:
       name: url_launcher_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.16"
+    version: "6.0.17"
   url_launcher_ios:
     dependency: transitive
     description:
       name: url_launcher_ios
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.15"
+    version: "6.0.17"
   url_launcher_linux:
     dependency: transitive
     description:
       name: url_launcher_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   url_launcher_macos:
     dependency: transitive
     description:
       name: url_launcher_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   url_launcher_platform_interface:
     dependency: transitive
     description:
@@ -713,14 +713,14 @@ packages:
       name: url_launcher_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.9"
+    version: "2.0.11"
   url_launcher_windows:
     dependency: transitive
     description:
       name: url_launcher_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   vector_math:
     dependency: transitive
     description:
@@ -748,7 +748,7 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.2"
+    version: "2.6.1"
   window_size:
     dependency: "direct main"
     description:
@@ -771,7 +771,7 @@ packages:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.0"
+    version: "3.1.1"
 sdks:
-  dart: ">=2.17.0-206.0.dev <3.0.0"
+  dart: ">=2.17.0 <3.0.0"
   flutter: ">=2.10.0"
diff --git a/experimental/linting_tool/pubspec.yaml b/experimental/linting_tool/pubspec.yaml
index 1c7d6f38c..d8ee75952 100644
--- a/experimental/linting_tool/pubspec.yaml
+++ b/experimental/linting_tool/pubspec.yaml
@@ -20,12 +20,12 @@ dependencies:
   file_selector_web: ^0.8.1+1
   file_selector_windows: ^0.8.2
   flutter_markdown: ^0.6.2
-  google_fonts: ^2.1.0
+  google_fonts: ^3.0.0
   hive: ^2.0.4
   hive_flutter: ^1.1.0
   http: ^0.13.3
   json2yaml: ^3.0.0
-  json_annotation: ^4.0.1
+  json_annotation: ^4.5.0
   mockito: ^5.0.13
   provider: ^6.0.2
   yaml: ^3.1.0
diff --git a/experimental/linting_tool/test/widget_test.mocks.dart b/experimental/linting_tool/test/widget_test.mocks.dart
index 98de493cc..5f976d678 100644
--- a/experimental/linting_tool/test/widget_test.mocks.dart
+++ b/experimental/linting_tool/test/widget_test.mocks.dart
@@ -1,4 +1,4 @@
-// Mocks generated by Mockito 5.0.13 from annotations
+// Mocks generated by Mockito 5.2.0 from annotations
 // in linting_tool/test/widget_test.dart.
 // Do not manually edit this file.
 
@@ -12,6 +12,7 @@ import 'package:http/src/response.dart' as _i2;
 import 'package:http/src/streamed_response.dart' as _i3;
 import 'package:mockito/mockito.dart' as _i1;
 
+// ignore_for_file: type=lint
 // ignore_for_file: avoid_redundant_argument_values
 // ignore_for_file: avoid_setters_without_getters
 // ignore_for_file: comment_references
@@ -19,10 +20,12 @@ import 'package:mockito/mockito.dart' as _i1;
 // ignore_for_file: invalid_use_of_visible_for_testing_member
 // ignore_for_file: prefer_const_constructors
 // ignore_for_file: unnecessary_parenthesis
+// ignore_for_file: camel_case_types
 
-class _FakeResponse extends _i1.Fake implements _i2.Response {}
+class _FakeResponse_0 extends _i1.Fake implements _i2.Response {}
 
-class _FakeStreamedResponse extends _i1.Fake implements _i3.StreamedResponse {}
+class _FakeStreamedResponse_1 extends _i1.Fake implements _i3.StreamedResponse {
+}
 
 /// A class which mocks [Client].
 ///
@@ -35,12 +38,12 @@ class MockClient extends _i1.Mock implements _i4.Client {
   @override
   _i5.Future<_i2.Response> head(Uri? url, {Map<String, String>? headers}) =>
       (super.noSuchMethod(Invocation.method(#head, [url], {#headers: headers}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<_i2.Response> get(Uri? url, {Map<String, String>? headers}) =>
       (super.noSuchMethod(Invocation.method(#get, [url], {#headers: headers}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<_i2.Response> post(Uri? url,
@@ -50,7 +53,7 @@ class MockClient extends _i1.Mock implements _i4.Client {
       (super.noSuchMethod(
               Invocation.method(#post, [url],
                   {#headers: headers, #body: body, #encoding: encoding}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<_i2.Response> put(Uri? url,
@@ -60,7 +63,7 @@ class MockClient extends _i1.Mock implements _i4.Client {
       (super.noSuchMethod(
               Invocation.method(#put, [url],
                   {#headers: headers, #body: body, #encoding: encoding}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<_i2.Response> patch(Uri? url,
@@ -70,7 +73,7 @@ class MockClient extends _i1.Mock implements _i4.Client {
       (super.noSuchMethod(
               Invocation.method(#patch, [url],
                   {#headers: headers, #body: body, #encoding: encoding}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<_i2.Response> delete(Uri? url,
@@ -80,7 +83,7 @@ class MockClient extends _i1.Mock implements _i4.Client {
       (super.noSuchMethod(
               Invocation.method(#delete, [url],
                   {#headers: headers, #body: body, #encoding: encoding}),
-              returnValue: Future<_i2.Response>.value(_FakeResponse()))
+              returnValue: Future<_i2.Response>.value(_FakeResponse_0()))
           as _i5.Future<_i2.Response>);
   @override
   _i5.Future<String> read(Uri? url, {Map<String, String>? headers}) =>
@@ -97,11 +100,9 @@ class MockClient extends _i1.Mock implements _i4.Client {
   _i5.Future<_i3.StreamedResponse> send(_i8.BaseRequest? request) =>
       (super.noSuchMethod(Invocation.method(#send, [request]),
               returnValue:
-                  Future<_i3.StreamedResponse>.value(_FakeStreamedResponse()))
+                  Future<_i3.StreamedResponse>.value(_FakeStreamedResponse_1()))
           as _i5.Future<_i3.StreamedResponse>);
   @override
   void close() => super.noSuchMethod(Invocation.method(#close, []),
       returnValueForMissingStub: null);
-  @override
-  String toString() => super.toString();
 }