diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01.dart
new file mode 100644
index 0000000000..3b5bddac4a
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01.dart
@@ -0,0 +1,56 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Declarations in any library augmentation or the augmented library
+/// are visible to all of the others, including private ones.
+///
+/// @description Checks that declarations in an augmentation are visible in a
+/// main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import '../../Utils/expect.dart';
+import augment 'defining_augmentation_A01_t01_lib.dart';
+
+extension on C1 {
+  String get z => "z";
+}
+
+extension on _C2 {
+  String get _z => "_z";
+}
+
+extension type ET1(C1 id) {}
+extension type ET2(_C2 id) {}
+
+class MA1 = Object with M1;
+class MA2 = Object with _M2;
+
+main() {
+  Expect.equals("y", C1().y);
+  Expect.equals("z", C1().z);
+  Expect.equals("m", MA1().m);
+  Expect.equals("_y", _C2()._y);
+  Expect.equals("_z", _C2()._z);
+  Expect.equals("_m", MA2()._m);
+  Expect.equals("y", ET1(C1()).id.y);
+  Expect.equals("_y", ET2(_C2()).id._y);
+  Expect.equals(E1.e, E1.e.instance);
+  Expect.equals(_E2.e, _E2.e._instance);
+  Expect.equals(42, x1);
+  Expect.equals(42, _x2);
+  Expect.equals(0, foo1());
+  Expect.equals(0, _foo2());
+  Expect.equals("bar", [].bar);
+  Expect.equals("bar", MyList([]).bar);
+  Expect.equals("_baz", [].baz);
+  Expect.equals("_baz", _MyList([]).baz);
+  Expect.equals(42, MyInt(42));
+  Expect.equals(42, _MyInt(42));
+  Expect.isTrue((Foo1 as dynamic) is Type);
+  Expect.isTrue((_Foo2 as dynamic) is Type);
+  Expect.isTrue((C1Alias as dynamic) is Type);
+  Expect.isTrue((_C2Alias as dynamic) is Type);
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01_lib.dart
new file mode 100644
index 0000000000..6b4c87c2c3
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t01_lib.dart
@@ -0,0 +1,70 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Declarations in any library augmentation or the augmented library
+/// are visible to all of the others, including private ones.
+///
+/// @description Checks that declarations in an augmentation are visible in a
+/// main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A01_t01.dart';
+
+class C1 {
+  String get y => "y";
+}
+
+mixin M1 {
+  String get m => "m";
+}
+
+enum E1 {
+  e;
+
+  E1 get instance => e;
+}
+
+var x1 = 42;
+
+int foo1() => 0;
+
+extension MyList on List {
+  String get bar => "bar";
+}
+
+extension type MyInt(int id) {}
+
+typedef void Foo1();
+
+typedef C1Alias = C1;
+
+class _C2 {
+  String get _y => "_y";
+}
+
+mixin _M2 {
+  String get _m => "_m";
+}
+
+enum _E2 {
+  e;
+
+  _E2 get _instance => e;
+}
+
+var _x2 = 42;
+
+int _foo2() => 0;
+
+extension _MyList on List {
+  String get baz => "_baz";
+}
+
+extension type _MyInt(int id2) {}
+
+typedef void _Foo2();
+
+typedef _C2Alias = _C2;
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02.dart
new file mode 100644
index 0000000000..e8ea844578
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02.dart
@@ -0,0 +1,77 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Declarations in any library augmentation or the augmented library
+/// are visible to all of the others, including private ones.
+///
+/// @description Checks that declarations in a main library are visible in an
+/// augmentation library
+/// @author sgrekhov22@gmail.com
+/// @issue 55103
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A01_t02_lib.dart';
+
+import '../../Utils/expect.dart';
+
+class C1 {
+  String get y => "y";
+}
+
+mixin M1 {
+  String get m => "m";
+}
+
+enum E1 {
+  e;
+
+  E1 get instance => e;
+}
+
+var x1 = 42;
+
+int foo1() => 0;
+
+extension MyList on List {
+  String get bar => "bar";
+}
+
+extension type MyInt(int id) {}
+
+typedef void Foo1();
+
+typedef C1Alias = C1;
+
+class _C2 {
+  String get _y => "_y";
+}
+
+mixin _M2 {
+  String get _m => "_m";
+}
+
+enum _E2 {
+  e;
+
+  _E2 get _instance => e;
+}
+
+var _x2 = 42;
+
+int _foo2() => 0;
+
+extension _MyList on List {
+  String get baz => "_baz";
+}
+
+extension type _MyInt(int id2) {}
+
+typedef void _Foo2();
+
+typedef _C2Alias = _C2;
+
+main() {
+  test();
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02_lib.dart
new file mode 100644
index 0000000000..1c2b2f52fa
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A01_t02_lib.dart
@@ -0,0 +1,57 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Declarations in any library augmentation or the augmented library
+/// are visible to all of the others, including private ones.
+///
+/// @description Checks that declarations in a main library are visible in an
+/// augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A01_t02.dart';
+
+import '../../Utils/expect.dart';
+
+extension on C1 {
+  String get z => "z";
+}
+
+extension on _C2 {
+  String get _z => "_z";
+}
+
+extension type ET1(C1 id) {}
+extension type ET2(_C2 id) {}
+
+class MA1 = Object with M1;
+class MA2 = Object with _M2;
+
+test() {
+  Expect.equals("y", C1().y);
+  Expect.equals("z", C1().z);
+  Expect.equals("m", MA1().m);
+  Expect.equals("_y", _C2()._y);
+  Expect.equals("_z", _C2()._z);
+  Expect.equals("_m", MA2()._m);
+  Expect.equals("y", ET1(C1()).id.y);
+  Expect.equals("_y", ET2(_C2()).id._y);
+  Expect.equals(E1.e, E1.e.instance);
+  Expect.equals(_E2.e, _E2.e._instance);
+  Expect.equals(42, x1);
+  Expect.equals(42, _x2);
+  Expect.equals(0, foo1());
+  Expect.equals(0, _foo2());
+  Expect.equals("bar", [].bar);
+  Expect.equals("bar", MyList([]).bar);
+  Expect.equals("_baz", [].baz);
+  Expect.equals("_baz", _MyList([]).baz);
+  Expect.equals(42, MyInt(42));
+  Expect.equals(42, _MyInt(42));
+  Expect.isTrue((Foo1 as dynamic) is Type);
+  Expect.isTrue((_Foo2 as dynamic) is Type);
+  Expect.isTrue((C1Alias as dynamic) is Type);
+  Expect.isTrue((_C2Alias as dynamic) is Type);
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01.dart
new file mode 100644
index 0000000000..79bb8bda58
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in a main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t01_lib.dart';
+
+main() {
+  print(AL);
+//      ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01_lib.dart
new file mode 100644
index 0000000000..4b6e40148c
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t01_lib.dart
@@ -0,0 +1,19 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in a main library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t01.dart';
+
+import 'augmentation_libraries_lib.dart';
+
+class C implements AL {}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02.dart
new file mode 100644
index 0000000000..3f6a750d09
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02.dart
@@ -0,0 +1,23 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in a main library even if an augmentation library exports it
+/// @author sgrekhov22@gmail.com
+/// @issue 55112
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t02_lib.dart';
+
+main() {
+  print(AL);
+//      ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02_lib.dart
new file mode 100644
index 0000000000..a3884485ed
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t02_lib.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in a main library even if an augmentation library exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t02.dart';
+
+import 'augmentation_libraries_lib.dart';
+export 'augmentation_libraries_lib.dart';
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03.dart
new file mode 100644
index 0000000000..c133b71048
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03.dart
@@ -0,0 +1,20 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t03_lib1.dart';
+import augment 'defining_augmentation_A02_t03_lib2.dart';
+
+main() {
+  test();
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib1.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib1.dart
new file mode 100644
index 0000000000..26d72fe6e9
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib1.dart
@@ -0,0 +1,17 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t03.dart';
+
+import 'augmentation_libraries_lib.dart';
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib2.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib2.dart
new file mode 100644
index 0000000000..c0dcdac783
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t03_lib2.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t03.dart';
+
+test() {
+  print(AL);
+//      ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04.dart
new file mode 100644
index 0000000000..6de726480e
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04.dart
@@ -0,0 +1,20 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library even if it exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t04_lib1.dart';
+import augment 'defining_augmentation_A02_t04_lib2.dart';
+
+main() {
+  test();
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib1.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib1.dart
new file mode 100644
index 0000000000..d88dec577e
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib1.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library even if it exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t04.dart';
+
+import 'augmentation_libraries_lib.dart';
+export 'augmentation_libraries_lib.dart';
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib2.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib2.dart
new file mode 100644
index 0000000000..57c1ef5f2f
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t04_lib2.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports in an augmentation library are not visible
+/// in another augmentation library even if it exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t04.dart';
+
+test() {
+  print(AL);
+//      ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05.dart
new file mode 100644
index 0000000000..bd76c4e2c4
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05.dart
@@ -0,0 +1,21 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports from main library are not visible in an
+/// augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t05_lib.dart';
+
+import 'augmentation_libraries_lib.dart';
+
+main() {
+  test();
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05_lib.dart
new file mode 100644
index 0000000000..645416ca7e
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t05_lib.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that imports from main library are not visible in an
+/// augmentation library
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library 'defining_augmentation_A02_t05.dart';
+
+test() {
+  print(AL);
+//      ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06.dart
new file mode 100644
index 0000000000..cbfb6727da
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06.dart
@@ -0,0 +1,19 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that if augment library does exports then augmented
+/// library implicitly exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import 'defining_augmentation_A02_t06_augmented_lib.dart';
+
+main() {
+  print(AL);
+}
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_augmented_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_augmented_lib.dart
new file mode 100644
index 0000000000..d9f97cfb23
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_augmented_lib.dart
@@ -0,0 +1,15 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that if augment library does exports then augmented
+/// library implicitly exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+import augment 'defining_augmentation_A02_t06_lib.dart';
diff --git a/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_lib.dart b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_lib.dart
new file mode 100644
index 0000000000..030cf4f616
--- /dev/null
+++ b/LanguageFeatures/Augmentation-libraries/defining_augmentation_A02_t06_lib.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Augmentations do not share an import scope with the main library
+/// or each other. The libraries one augmentation imports are visible only to
+/// that file.
+///
+/// @description Checks that if augment library does exports then augmented
+/// library implicitly exports it
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=macros
+
+augment library  'defining_augmentation_A02_t06_augmented_lib.dart';
+
+import 'augmentation_libraries_lib.dart';
+export 'augmentation_libraries_lib.dart';