From 0deedd33b71ba3613ba2539c519434e7e5f6b755 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Tue, 26 May 2026 15:57:10 -0700
Subject: [PATCH 01/14] [material_ui] Set up `gen_defaults` sub-directory
 (#11762)

Work towards https://github.com/flutter/flutter/issues/186906

Adds the initial `gen_defaults` sub-directory with the initial
`TokenTemplate` and generator. This is simply the initial scaffold, we
will need to add additional helper functions as necessary as we begin
adding the actual templates.

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there for submitting PRs.
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- [x] I read the [Tree Hygiene] page, which explains my
responsibilities.
- [x] I read and followed the [relevant style guides] and ran [the
auto-formatter].
- [x] I signed the [CLA].
- [x] The title of the PR starts with the name of the package surrounded
by square brackets, e.g. `[shared_preferences]`
- [x] I [linked to at least one issue that this PR fixes] in the
description above.
- [x] I followed [the version and CHANGELOG instructions], using
[semantic versioning] and the [repository CHANGELOG style], or I have
commented below to indicate which documented exception this PR falls
under[^1].
- [x] I updated/added any relevant documentation (doc comments with
`///`).
- [x] I added new tests to check the change I am making, or I have
commented below to indicate which [test exemption] this PR falls
under[^1].
- [ ] All existing and new tests are passing.

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[the version and CHANGELOG instructions]:
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[semantic versioning]:
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[repository CHANGELOG style]:
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[test exemption]:
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---
 .../material_ui/tool/gen_defaults/README.md   |  24 ++++
 .../tool/gen_defaults/analysis_options.yaml   |   4 +
 .../tool/gen_defaults/bin/gen_defaults.dart   |  28 +++++
 .../tool/gen_defaults/pubspec.yaml            |  17 +++
 .../tool/gen_defaults/templates/template.dart | 111 +++++++++++++++++
 .../gen_defaults/test/gen_defaults_test.dart  | 112 ++++++++++++++++++
 .../test/test_fixtures/button_token_data.dart |   8 ++
 .../test/test_fixtures/test_templates.dart    |  66 +++++++++++
 8 files changed, 370 insertions(+)
 create mode 100644 packages/material_ui/tool/gen_defaults/README.md
 create mode 100644 packages/material_ui/tool/gen_defaults/analysis_options.yaml
 create mode 100644 packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart
 create mode 100644 packages/material_ui/tool/gen_defaults/pubspec.yaml
 create mode 100644 packages/material_ui/tool/gen_defaults/templates/template.dart
 create mode 100644 packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
 create mode 100644 packages/material_ui/tool/gen_defaults/test/test_fixtures/button_token_data.dart
 create mode 100644 packages/material_ui/tool/gen_defaults/test/test_fixtures/test_templates.dart

diff --git a/packages/material_ui/tool/gen_defaults/README.md b/packages/material_ui/tool/gen_defaults/README.md
new file mode 100644
index 000000000000..56581126a8ca
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/README.md
@@ -0,0 +1,24 @@
+## Token Defaults Generator
+
+Script that generates component theme data defaults based on token data.
+
+## Usage
+Run this program from the root of the git repository:
+```sh
+dart packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart [-v]
+```
+
+This updates generated component theming files under
+`packages/material_ui/lib/src/generated`.
+
+## Templates
+
+There is a template file for every component that needs defaults from the token
+database. These templates are implemented as subclasses of either `M3TokenTemplate` or `M3ETokenTemplate`.
+
+Templates need to override the `generateContents` method to provide the
+generated code block as a string.
+
+## Tokens
+
+Tokens are stored in `data/`, and are sourced from an internal Google database.
\ No newline at end of file
diff --git a/packages/material_ui/tool/gen_defaults/analysis_options.yaml b/packages/material_ui/tool/gen_defaults/analysis_options.yaml
new file mode 100644
index 000000000000..1fb98de01a0b
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/analysis_options.yaml
@@ -0,0 +1,4 @@
+include: ../../../../analysis_options.yaml
+
+formatter:
+  page_width: 100
diff --git a/packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart b/packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart
new file mode 100644
index 000000000000..2da295bc4e99
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart
@@ -0,0 +1,28 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ## Usage
+//
+// Run from the root of flutter/packages:
+//
+// ```
+// dart packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart [-v]
+// ```
+
+import 'package:args/args.dart';
+
+// TODO(elliette): Import template files.
+// import '../templates/x_template.dart';
+
+Future<void> main(List<String> args) async {
+  // Parse arguments
+  final parser = ArgParser();
+  parser.addFlag('verbose', abbr: 'v', help: 'Enable verbose output', negatable: false);
+  final ArgResults argResults = parser.parse(args);
+  // TODO(elliette): Add token logger when verbose flag is used.
+  // ignore: unused_local_variable
+  final verbose = argResults['verbose'] as bool;
+  // TODO(elliette): Invoke template generators.
+  // const XTemplate().generateFile(verbose: verbose);
+}
diff --git a/packages/material_ui/tool/gen_defaults/pubspec.yaml b/packages/material_ui/tool/gen_defaults/pubspec.yaml
new file mode 100644
index 000000000000..6ab022d87c3d
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/pubspec.yaml
@@ -0,0 +1,17 @@
+name: gen_defaults
+description: A command line script to generate Material component defaults from the token database.
+publish_to: none
+version: 1.0.0
+
+environment:
+  sdk: ^3.10.0-0
+
+resolution: workspace
+
+dependencies:
+  args: any
+  meta: any
+
+dev_dependencies:
+  path: any
+  test: any
diff --git a/packages/material_ui/tool/gen_defaults/templates/template.dart b/packages/material_ui/tool/gen_defaults/templates/template.dart
new file mode 100644
index 000000000000..e10ffca26693
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/templates/template.dart
@@ -0,0 +1,111 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:meta/meta.dart';
+
+enum _MaterialVersion { material3, material3Expressive }
+
+abstract class M3TokenTemplate extends _TokenTemplate {
+  const M3TokenTemplate();
+
+  @override
+  _MaterialVersion get _version => _MaterialVersion.material3;
+}
+
+abstract class M3ETokenTemplate extends _TokenTemplate {
+  const M3ETokenTemplate();
+
+  @override
+  _MaterialVersion get _version => _MaterialVersion.material3Expressive;
+}
+
+abstract class _TokenTemplate {
+  const _TokenTemplate();
+
+  static const String copyrightHeader = '''
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+''';
+
+  static const String headerComment = '''
+
+// Do not edit by hand. The code is generated from data in the Material
+// Design token database by the script:
+//   packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart.
+''';
+
+  /// The Material version this template is for.
+  _MaterialVersion get _version;
+
+  /// The name of the template, which corresponds to the target file name.
+  /// E.g., 'typography' for generating 'typography_defaults.g.dart'.
+  String get name;
+
+  @visibleForTesting
+  String get materialLib {
+    const packagePath = 'packages/material_ui';
+    const generatedDirectory = 'lib/src/generated';
+    final String relativeOutputPath = switch (_version) {
+      _MaterialVersion.material3 => generatedDirectory,
+      _MaterialVersion.material3Expressive => '$generatedDirectory/material_3_expressive',
+    };
+    if (Directory(packagePath).existsSync()) {
+      return '$packagePath/$relativeOutputPath';
+    }
+    return relativeOutputPath;
+  }
+
+  String generateContents();
+
+  void generateFile({bool verbose = false}) {
+    final fileName = '$materialLib/${name}_defaults.g.dart';
+    if (verbose) {
+      stdout.writeln('Generating file: $fileName');
+      stdout.writeln('Target parent file name: $name.dart');
+    }
+    final file = File(fileName);
+    if (!file.existsSync()) {
+      if (verbose) {
+        stdout.writeln('File does not exist, creating it.');
+      }
+      file.createSync(recursive: true);
+    }
+
+    final parentName = '$name.dart';
+
+    if (verbose) {
+      stdout.writeln('Generating contents...');
+    }
+    final buffer = StringBuffer();
+    buffer.write(copyrightHeader);
+    buffer.write(headerComment);
+    final String partOfPath = switch (_version) {
+      _MaterialVersion.material3 => '../$parentName',
+      _MaterialVersion.material3Expressive => '../../material_3_expressive/$parentName',
+    };
+    buffer.write("part of '$partOfPath';\n\n");
+    buffer.write(generateContents());
+
+    if (verbose) {
+      stdout.writeln('Writing generated contents to $fileName...');
+    }
+    file.writeAsStringSync(buffer.toString());
+    if (verbose) {
+      stdout.writeln('Formatting $fileName...');
+    }
+    final ProcessResult result = Process.runSync(Platform.resolvedExecutable, <String>[
+      'format',
+      fileName,
+    ]);
+    if (result.exitCode != 0) {
+      stderr.writeln('Failed to format $fileName: ${result.stderr}');
+    }
+    if (verbose) {
+      stdout.writeln('Done generating $fileName.');
+    }
+  }
+}
diff --git a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
new file mode 100644
index 000000000000..91053fcd959d
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
@@ -0,0 +1,112 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:test/test.dart';
+import 'test_fixtures/test_templates.dart';
+
+void main() {
+  Directory? tempDir;
+  String testPath() => tempDir!.path;
+
+  group('gen_defaults templates', () {
+    setUp(() {
+      tempDir = Directory.systemTemp.createTempSync('gen_defaults');
+    });
+
+    tearDown(() {
+      tempDir!.deleteSync(recursive: true);
+    });
+
+    test('will generate a part file ending in _defaults.g.dart', () {
+      final template = ButtonTemplate(testPath());
+      template.generateFile(verbose: true);
+
+      final file = File('${testPath()}/button_defaults.g.dart');
+      expect(file.existsSync(), isTrue);
+    });
+
+    test('will generate a file with the correct header text', () {
+      final template = ButtonTemplate(testPath());
+      template.generateFile();
+
+      final file = File('${testPath()}/button_defaults.g.dart');
+      final String fileContents = file.readAsStringSync();
+      expect(fileContents, contains(_fileHeader));
+    });
+
+    test('will generate a file with the expected contents', () {
+      final template = ButtonTemplate(testPath());
+      template.generateFile();
+
+      final file = File('${testPath()}/button_defaults.g.dart');
+      final String fileContents = file.readAsStringSync();
+      expect(fileContents, contains(_buttonDefaultsClass));
+    });
+
+    test('will completely overwrite any previous code', () {
+      final file = File('${testPath()}/button_defaults.g.dart');
+      const randomText = 'Pre-existing random text.';
+      file.writeAsStringSync(randomText);
+
+      final template = ButtonTemplate(testPath());
+      template.generateFile();
+      final String fileContents = file.readAsStringSync();
+      expect(fileContents, isNot(contains(randomText)));
+      expect(fileContents, contains(_buttonDefaultsClass));
+    });
+
+    test('will run dart format over the generated file', () {
+      final template = UnformattedTemplate(testPath());
+      template.generateFile();
+
+      final file = File('${testPath()}/unformatted_defaults.g.dart');
+      expect(file.readAsStringSync(), contains(formattedClass));
+    });
+
+    test('materialLib path resolves correctly based on MaterialVersion', () {
+      final m3Template = TestM3Template();
+      final m3ExpressiveTemplate = TestM3ExpressiveTemplate();
+      const materialUiDir = 'packages/material_ui';
+      const generatedDir = 'lib/src/generated';
+
+      final bool hasPackageDir = Directory(materialUiDir).existsSync();
+      if (hasPackageDir) {
+        expect(m3Template.materialLib, '$materialUiDir/$generatedDir');
+        expect(
+          m3ExpressiveTemplate.materialLib,
+          '$materialUiDir/$generatedDir/material_3_expressive',
+        );
+      } else {
+        expect(m3Template.materialLib, generatedDir);
+        expect(m3ExpressiveTemplate.materialLib, '$generatedDir/material_3_expressive');
+      }
+    });
+  });
+}
+
+const _fileHeader = '''
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Do not edit by hand. The code is generated from data in the Material
+// Design token database by the script:
+//   packages/material_ui/tool/gen_defaults/bin/gen_defaults.dart.
+''';
+
+const _buttonDefaultsClass = '''
+class _ButtonDefaults {
+  static const double height = 40.0;
+  static const double borderRadius = 8.0;
+}
+''';
+
+const formattedClass = '''
+class UnformattedClass {
+  final int x = 1;
+  final String y = 'hello';
+}
+''';
diff --git a/packages/material_ui/tool/gen_defaults/test/test_fixtures/button_token_data.dart b/packages/material_ui/tool/gen_defaults/test/test_fixtures/button_token_data.dart
new file mode 100644
index 000000000000..dbebb961a1e7
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/test/test_fixtures/button_token_data.dart
@@ -0,0 +1,8 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+class TokenButton {
+  static const double height = 40.0;
+  static const double borderRadius = 8.0;
+}
diff --git a/packages/material_ui/tool/gen_defaults/test/test_fixtures/test_templates.dart b/packages/material_ui/tool/gen_defaults/test/test_fixtures/test_templates.dart
new file mode 100644
index 000000000000..e56d0c8ef85d
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/test/test_fixtures/test_templates.dart
@@ -0,0 +1,66 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../../templates/template.dart';
+import 'button_token_data.dart';
+
+class ButtonTemplate extends M3ETokenTemplate {
+  ButtonTemplate(this.customMaterialLib);
+
+  final String customMaterialLib;
+
+  @override
+  String get name => 'button';
+
+  @override
+  String get materialLib => customMaterialLib;
+
+  @override
+  String generateContents() {
+    return '''
+class _ButtonDefaults {
+  static const double height = ${TokenButton.height};
+  static const double borderRadius = ${TokenButton.borderRadius};
+}
+''';
+  }
+}
+
+class UnformattedTemplate extends M3TokenTemplate {
+  UnformattedTemplate(this.customMaterialLib);
+
+  final String customMaterialLib;
+
+  @override
+  String get name => 'unformatted';
+
+  @override
+  String get materialLib => customMaterialLib;
+
+  @override
+  String generateContents() {
+    return '''
+class   UnformattedClass   {
+final    int    x = 1  ;
+  final String y   =   'hello' ;
+}
+''';
+  }
+}
+
+class TestM3Template extends M3TokenTemplate {
+  @override
+  String get name => 'm3';
+
+  @override
+  String generateContents() => '';
+}
+
+class TestM3ExpressiveTemplate extends M3ETokenTemplate {
+  @override
+  String get name => 'm3e';
+
+  @override
+  String generateContents() => '';
+}

From a1dc2c810d2970d500f701b6425b41f75aa5883f Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 13 Aug 2026 13:47:23 -0700
Subject: [PATCH 02/14] Add CHANGELOG entry

---
 .../pending_changelogs/change_2026_08_13_1786652261816.yaml    | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 packages/material_ui/pending_changelogs/change_2026_08_13_1786652261816.yaml

diff --git a/packages/material_ui/pending_changelogs/change_2026_08_13_1786652261816.yaml b/packages/material_ui/pending_changelogs/change_2026_08_13_1786652261816.yaml
new file mode 100644
index 000000000000..20995a7f1cb2
--- /dev/null
+++ b/packages/material_ui/pending_changelogs/change_2026_08_13_1786652261816.yaml
@@ -0,0 +1,3 @@
+changelog: |
+  - Set-up tool/gen_defaults sub-directory.
+version: skip

From e3fa26e9ff6e56a7d1f1832094979b698b777fc6 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 13 Aug 2026 16:03:56 -0700
Subject: [PATCH 03/14] Remove workspace resolution

---
 packages/material_ui/tool/gen_defaults/pubspec.yaml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/packages/material_ui/tool/gen_defaults/pubspec.yaml b/packages/material_ui/tool/gen_defaults/pubspec.yaml
index 6ab022d87c3d..13b1d0fb6d86 100644
--- a/packages/material_ui/tool/gen_defaults/pubspec.yaml
+++ b/packages/material_ui/tool/gen_defaults/pubspec.yaml
@@ -6,8 +6,6 @@ version: 1.0.0
 environment:
   sdk: ^3.10.0-0
 
-resolution: workspace
-
 dependencies:
   args: any
   meta: any

From 776cfba93896529d10633bc49da6318ea6a53eec Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 13 Aug 2026 16:49:15 -0700
Subject: [PATCH 04/14] Bump SDK

---
 packages/material_ui/tool/gen_defaults/pubspec.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/material_ui/tool/gen_defaults/pubspec.yaml b/packages/material_ui/tool/gen_defaults/pubspec.yaml
index 13b1d0fb6d86..eefb89500ac4 100644
--- a/packages/material_ui/tool/gen_defaults/pubspec.yaml
+++ b/packages/material_ui/tool/gen_defaults/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 version: 1.0.0
 
 environment:
-  sdk: ^3.10.0-0
+  sdk: ^3.12.0
 
 dependencies:
   args: any

From 10b8d80ac406a957319a5eb6819c2b669ff11c9f Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Fri, 14 Aug 2026 15:00:44 -0700
Subject: [PATCH 05/14] Fix dashboard checks

---
 packages/material_ui/tool/gen_defaults/pubspec.yaml       | 8 ++++----
 .../tool/gen_defaults/test/gen_defaults_test.dart         | 3 +++
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/packages/material_ui/tool/gen_defaults/pubspec.yaml b/packages/material_ui/tool/gen_defaults/pubspec.yaml
index eefb89500ac4..d591cbe44453 100644
--- a/packages/material_ui/tool/gen_defaults/pubspec.yaml
+++ b/packages/material_ui/tool/gen_defaults/pubspec.yaml
@@ -7,9 +7,9 @@ environment:
   sdk: ^3.12.0
 
 dependencies:
-  args: any
-  meta: any
+  args: ^2.7.0
+  meta: ^1.18.0
+  path: ^1.9.1
 
 dev_dependencies:
-  path: any
-  test: any
+  test: ^1.31.1
diff --git a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
index 91053fcd959d..c4830ae6fda6 100644
--- a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
+++ b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.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.
 
+@TestOn('!chrome')
+library;
+
 import 'dart:io';
 
 import 'package:test/test.dart';

From 67eab755711bec9bd058753fb7cb70768eafe030 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Mon, 17 Aug 2026 13:25:11 -0700
Subject: [PATCH 06/14] Add .pubignore

---
 packages/material_ui/.pubignore | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 packages/material_ui/.pubignore

diff --git a/packages/material_ui/.pubignore b/packages/material_ui/.pubignore
new file mode 100644
index 000000000000..8e1e131db9b0
--- /dev/null
+++ b/packages/material_ui/.pubignore
@@ -0,0 +1,2 @@
+# The tool/ directory is for package developer use only and should not be published.
+tool/
\ No newline at end of file

From 467afa4a580a456e62f322a7af758769c8f8adda Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Mon, 17 Aug 2026 13:26:19 -0700
Subject: [PATCH 07/14] New line end of file

---
 packages/material_ui/.pubignore | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/material_ui/.pubignore b/packages/material_ui/.pubignore
index 8e1e131db9b0..e4895aa60324 100644
--- a/packages/material_ui/.pubignore
+++ b/packages/material_ui/.pubignore
@@ -1,2 +1,2 @@
 # The tool/ directory is for package developer use only and should not be published.
-tool/
\ No newline at end of file
+tool/

From 1ef560298c86bff64020ed083b9ab2f15877ce78 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Wed, 19 Aug 2026 16:52:27 -0700
Subject: [PATCH 08/14] Exclude web unit testing on gen_defaults

---
 .ci/targets/web_dart_unit_tests.yaml                     | 3 ++-
 .ci/targets/web_dart_unit_tests_wasm.yaml                | 3 ++-
 .../tool/gen_defaults/test/gen_defaults_test.dart        | 3 ---
 script/configs/exclude_unit_tests_web.yaml               | 9 +++++++++
 4 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 script/configs/exclude_unit_tests_web.yaml

diff --git a/.ci/targets/web_dart_unit_tests.yaml b/.ci/targets/web_dart_unit_tests.yaml
index 16cdf1771bb0..aaca3bc84323 100644
--- a/.ci/targets/web_dart_unit_tests.yaml
+++ b/.ci/targets/web_dart_unit_tests.yaml
@@ -7,5 +7,6 @@ tasks:
     args: [
       "dart-test",
       "--platform=chrome",
-      "--exclude=script/configs/dart_unit_tests_exceptions.yaml"
+      "--exclude=script/configs/dart_unit_tests_exceptions.yaml",
+      "--exclude=script/configs/exclude_unit_tests_web.yaml"
     ]
diff --git a/.ci/targets/web_dart_unit_tests_wasm.yaml b/.ci/targets/web_dart_unit_tests_wasm.yaml
index a5a6eeeddf0d..1aa10e10c96a 100644
--- a/.ci/targets/web_dart_unit_tests_wasm.yaml
+++ b/.ci/targets/web_dart_unit_tests_wasm.yaml
@@ -9,5 +9,6 @@ tasks:
       "--platform=chrome",
       "--wasm",
       "--exclude=script/configs/dart_unit_tests_exceptions.yaml",
-      "--exclude=script/configs/dart_unit_tests_wasm_exceptions.yaml"
+      "--exclude=script/configs/dart_unit_tests_wasm_exceptions.yaml",
+      "--exclude=script/configs/exclude_unit_tests_web.yaml"
     ]
diff --git a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
index c4830ae6fda6..91053fcd959d 100644
--- a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
+++ b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-@TestOn('!chrome')
-library;
-
 import 'dart:io';
 
 import 'package:test/test.dart';
diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
new file mode 100644
index 000000000000..16727d63c79b
--- /dev/null
+++ b/script/configs/exclude_unit_tests_web.yaml
@@ -0,0 +1,9 @@
+# Packages that are excluded from web unit tests (compiled to JS/Wasm).
+#
+# Each excluded package should have a comment for why it is excluded.
+#
+# If trying to exclude a test that works in JS mode but fails in Wasm, use the
+# dart_unit_tests_wasm_exceptions.yaml file instead.
+
+# CLI-tool for material_ui developers to generate Material tokens.
+material_ui/tool/gen_defaults

From 742fb9650ac055e09acbd32c7c39b701c29b5c65 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 09:00:00 -0700
Subject: [PATCH 09/14] Fix formatting

---
 script/configs/exclude_unit_tests_web.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
index 16727d63c79b..dbbe60c84d97 100644
--- a/script/configs/exclude_unit_tests_web.yaml
+++ b/script/configs/exclude_unit_tests_web.yaml
@@ -6,4 +6,4 @@
 # dart_unit_tests_wasm_exceptions.yaml file instead.
 
 # CLI-tool for material_ui developers to generate Material tokens.
-material_ui/tool/gen_defaults
+- material_ui/tool/gen_defaults

From 83626cbf8fac59f52abfec6d976246865e5d1df1 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 10:47:54 -0700
Subject: [PATCH 10/14] Change path to fix package exclusion from tests

---
 script/configs/exclude_unit_tests_web.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
index dbbe60c84d97..1309391f23fa 100644
--- a/script/configs/exclude_unit_tests_web.yaml
+++ b/script/configs/exclude_unit_tests_web.yaml
@@ -6,4 +6,4 @@
 # dart_unit_tests_wasm_exceptions.yaml file instead.
 
 # CLI-tool for material_ui developers to generate Material tokens.
-- material_ui/tool/gen_defaults
+- gen_defaults

From db04a2bb81bc85fb7d1a1422ce04f30850653312 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 13:30:34 -0700
Subject: [PATCH 11/14] Revert "Change path to fix package exclusion from
 tests"

This reverts commit 83626cbf8fac59f52abfec6d976246865e5d1df1.
---
 script/configs/exclude_unit_tests_web.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
index 1309391f23fa..dbbe60c84d97 100644
--- a/script/configs/exclude_unit_tests_web.yaml
+++ b/script/configs/exclude_unit_tests_web.yaml
@@ -6,4 +6,4 @@
 # dart_unit_tests_wasm_exceptions.yaml file instead.
 
 # CLI-tool for material_ui developers to generate Material tokens.
-- gen_defaults
+- material_ui/tool/gen_defaults

From dc16e01d730319e5056d0ff4aa1c3f7b7e2262f7 Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 13:30:56 -0700
Subject: [PATCH 12/14] Revert "Fix formatting"

This reverts commit 742fb9650ac055e09acbd32c7c39b701c29b5c65.
---
 script/configs/exclude_unit_tests_web.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
index dbbe60c84d97..16727d63c79b 100644
--- a/script/configs/exclude_unit_tests_web.yaml
+++ b/script/configs/exclude_unit_tests_web.yaml
@@ -6,4 +6,4 @@
 # dart_unit_tests_wasm_exceptions.yaml file instead.
 
 # CLI-tool for material_ui developers to generate Material tokens.
-- material_ui/tool/gen_defaults
+material_ui/tool/gen_defaults

From fe7e22c3df725e9367f71ca79cd88030de11858a Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 13:31:30 -0700
Subject: [PATCH 13/14] Revert "Exclude web unit testing on gen_defaults"

This reverts commit 1ef560298c86bff64020ed083b9ab2f15877ce78.
---
 .ci/targets/web_dart_unit_tests.yaml                     | 3 +--
 .ci/targets/web_dart_unit_tests_wasm.yaml                | 3 +--
 .../tool/gen_defaults/test/gen_defaults_test.dart        | 3 +++
 script/configs/exclude_unit_tests_web.yaml               | 9 ---------
 4 files changed, 5 insertions(+), 13 deletions(-)
 delete mode 100644 script/configs/exclude_unit_tests_web.yaml

diff --git a/.ci/targets/web_dart_unit_tests.yaml b/.ci/targets/web_dart_unit_tests.yaml
index aaca3bc84323..16cdf1771bb0 100644
--- a/.ci/targets/web_dart_unit_tests.yaml
+++ b/.ci/targets/web_dart_unit_tests.yaml
@@ -7,6 +7,5 @@ tasks:
     args: [
       "dart-test",
       "--platform=chrome",
-      "--exclude=script/configs/dart_unit_tests_exceptions.yaml",
-      "--exclude=script/configs/exclude_unit_tests_web.yaml"
+      "--exclude=script/configs/dart_unit_tests_exceptions.yaml"
     ]
diff --git a/.ci/targets/web_dart_unit_tests_wasm.yaml b/.ci/targets/web_dart_unit_tests_wasm.yaml
index 1aa10e10c96a..a5a6eeeddf0d 100644
--- a/.ci/targets/web_dart_unit_tests_wasm.yaml
+++ b/.ci/targets/web_dart_unit_tests_wasm.yaml
@@ -9,6 +9,5 @@ tasks:
       "--platform=chrome",
       "--wasm",
       "--exclude=script/configs/dart_unit_tests_exceptions.yaml",
-      "--exclude=script/configs/dart_unit_tests_wasm_exceptions.yaml",
-      "--exclude=script/configs/exclude_unit_tests_web.yaml"
+      "--exclude=script/configs/dart_unit_tests_wasm_exceptions.yaml"
     ]
diff --git a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
index 91053fcd959d..c4830ae6fda6 100644
--- a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
+++ b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.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.
 
+@TestOn('!chrome')
+library;
+
 import 'dart:io';
 
 import 'package:test/test.dart';
diff --git a/script/configs/exclude_unit_tests_web.yaml b/script/configs/exclude_unit_tests_web.yaml
deleted file mode 100644
index 16727d63c79b..000000000000
--- a/script/configs/exclude_unit_tests_web.yaml
+++ /dev/null
@@ -1,9 +0,0 @@
-# Packages that are excluded from web unit tests (compiled to JS/Wasm).
-#
-# Each excluded package should have a comment for why it is excluded.
-#
-# If trying to exclude a test that works in JS mode but fails in Wasm, use the
-# dart_unit_tests_wasm_exceptions.yaml file instead.
-
-# CLI-tool for material_ui developers to generate Material tokens.
-material_ui/tool/gen_defaults

From f082ed1c0f7151ae980f04f6316adb4f8eee0ebb Mon Sep 17 00:00:00 2001
From: Elliott Brooks <21270878+elliette@users.noreply.github.com>
Date: Thu, 20 Aug 2026 13:33:16 -0700
Subject: [PATCH 14/14] Use dart_test.yaml file to prevent web testing instead

---
 packages/material_ui/tool/gen_defaults/dart_test.yaml          | 1 +
 .../material_ui/tool/gen_defaults/test/gen_defaults_test.dart  | 3 ---
 2 files changed, 1 insertion(+), 3 deletions(-)
 create mode 100644 packages/material_ui/tool/gen_defaults/dart_test.yaml

diff --git a/packages/material_ui/tool/gen_defaults/dart_test.yaml b/packages/material_ui/tool/gen_defaults/dart_test.yaml
new file mode 100644
index 000000000000..d02ef3a43beb
--- /dev/null
+++ b/packages/material_ui/tool/gen_defaults/dart_test.yaml
@@ -0,0 +1 @@
+test_on: "vm"
\ No newline at end of file
diff --git a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
index c4830ae6fda6..91053fcd959d 100644
--- a/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
+++ b/packages/material_ui/tool/gen_defaults/test/gen_defaults_test.dart
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-@TestOn('!chrome')
-library;
-
 import 'dart:io';
 
 import 'package:test/test.dart';